From 60cbc57a0782336ac7b0fa255ca1a166dd7894de Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 13:36:18 +0200
Subject: [PATCH 001/295] [ion/device] Fix unresponsive keyboard

---
 ion/src/device/events_keyboard_platform.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ion/src/device/events_keyboard_platform.cpp b/ion/src/device/events_keyboard_platform.cpp
index 4c2b1a605..0ea71ee61 100644
--- a/ion/src/device/events_keyboard_platform.cpp
+++ b/ion/src/device/events_keyboard_platform.cpp
@@ -13,7 +13,7 @@ Event getPlatformEvent() {
   bool usbPlugged = USB::isPlugged();
   if (usbPlugged != sLastUSBPlugged) {
     sLastUSBPlugged = usbPlugged;
-    return Events::USBPlug;
+    return USBPlug;
   }
 
   // Second, check if the USB device has been connected to an USB host
@@ -21,9 +21,11 @@ Event getPlatformEvent() {
   if (usbEnumerated != sLastUSBEnumerated) {
     sLastUSBEnumerated = usbEnumerated;
     if (usbEnumerated) {
-      return Events::USBEnumeration;
+      return USBEnumeration;
     }
   }
+
+  return None;
 }
 
 }

From bb89ae9211e37a5fd249d6e66ee3a34410d37ee9 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 09:41:54 +0200
Subject: [PATCH 002/295] [python/kandinsky] Color can now be passed as a tuple

The values are expected to be integers between 0 and 255
---
 python/port/mod/kandinsky/modkandinsky.cpp | 43 +++++++++++++++++-----
 1 file changed, 33 insertions(+), 10 deletions(-)

diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index e36b5a462..db688ae29 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -1,9 +1,35 @@
 extern "C" {
 #include "modkandinsky.h"
+#include <py/objtuple.h>
+#include <py/runtime.h>
 }
 #include <kandinsky.h>
 #include "port.h"
 
+static KDColor ColorForTuple(mp_obj_t tuple) {
+    size_t len;
+    mp_obj_t * elem;
+
+    mp_obj_get_array(tuple, &len, &elem);
+    if (len != 3) {
+      mp_raise_TypeError("color needs 3 components");
+    }
+
+    return KDColor::RGB888(
+      mp_obj_get_int(elem[0]),
+      mp_obj_get_int(elem[1]),
+      mp_obj_get_int(elem[2])
+    );
+}
+
+static mp_obj_t TupleForRGB(uint8_t r, uint8_t g, uint8_t b) {
+  mp_obj_tuple_t * t = static_cast<mp_obj_tuple_t *>(MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL)));
+  t->items[0] = MP_OBJ_NEW_SMALL_INT(r);
+  t->items[1] = MP_OBJ_NEW_SMALL_INT(g);
+  t->items[2] = MP_OBJ_NEW_SMALL_INT(b);
+  return MP_OBJ_FROM_PTR(t);
+}
+
 /* KDIonContext::sharedContext needs to be set to the wanted Rect before
  * calling kandinsky_get_pixel, kandinsky_set_pixel and kandinsky_draw_string.
  * We do this here with displaySandbox(), which pushes the SandboxController on
@@ -11,28 +37,25 @@ extern "C" {
  * KDIonContext::sharedContext is set to the frame of the last object drawn. */
 
 mp_obj_t modkandinsky_color(mp_obj_t red, mp_obj_t green, mp_obj_t blue) {
-  return
-    MP_OBJ_NEW_SMALL_INT(
-      KDColor::RGB888(
-        mp_obj_get_int(red),
-        mp_obj_get_int(green),
-        mp_obj_get_int(blue)
-      )
-    );
+  return TupleForRGB(
+    mp_obj_get_int(red),
+    mp_obj_get_int(green),
+    mp_obj_get_int(blue)
+  );
 }
 
 mp_obj_t modkandinsky_get_pixel(mp_obj_t x, mp_obj_t y) {
   KDColor c = KDIonContext::sharedContext()->getPixel(
     KDPoint(mp_obj_get_int(x), mp_obj_get_int(y))
   );
-  return MP_OBJ_NEW_SMALL_INT(c);
+  return TupleForRGB(c.red(), c.green(), c.blue());
 }
 
 mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color) {
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
   KDIonContext::sharedContext()->setPixel(
     KDPoint(mp_obj_get_int(x), mp_obj_get_int(y)),
-    KDColor::RGB16(mp_obj_get_int(color))
+    ColorForTuple(color)
   );
   return mp_const_none;
 }

From 926b96cafbf7176bb39e78d7fa1617f25ddc254f Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 09:57:28 +0200
Subject: [PATCH 003/295] [python/kandinsky] Expose the fill_rect method

Which allows for *much* faster graphics
---
 python/port/genhdr/qstrdefs.in.h               |  1 +
 python/port/mod/kandinsky/modkandinsky.cpp     | 13 +++++++++++++
 python/port/mod/kandinsky/modkandinsky.h       |  1 +
 python/port/mod/kandinsky/modkandinsky_table.c |  2 ++
 4 files changed, 17 insertions(+)

diff --git a/python/port/genhdr/qstrdefs.in.h b/python/port/genhdr/qstrdefs.in.h
index f905e1dea..540a17da4 100644
--- a/python/port/genhdr/qstrdefs.in.h
+++ b/python/port/genhdr/qstrdefs.in.h
@@ -21,6 +21,7 @@ QCFG(BYTES_IN_HASH, (2))
 Q(kandinsky)
 Q(color)
 Q(draw_string)
+Q(fill_rect)
 Q(get_pixel)
 Q(set_pixel)
 
diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index db688ae29..3878f33a3 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -69,3 +69,16 @@ mp_obj_t modkandinsky_draw_string(mp_obj_t text, mp_obj_t x, mp_obj_t y) {
   return mp_const_none;
 }
 
+mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t * args) {
+  MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
+  KDIonContext::sharedContext()->fillRect(
+    KDRect(
+      mp_obj_get_int(args[0]),
+      mp_obj_get_int(args[1]),
+      mp_obj_get_int(args[2]),
+      mp_obj_get_int(args[3])
+    ),
+    ColorForTuple(args[4])
+  );
+  return mp_const_none;
+}
diff --git a/python/port/mod/kandinsky/modkandinsky.h b/python/port/mod/kandinsky/modkandinsky.h
index c9dc84989..11bc43b0b 100644
--- a/python/port/mod/kandinsky/modkandinsky.h
+++ b/python/port/mod/kandinsky/modkandinsky.h
@@ -4,3 +4,4 @@ mp_obj_t modkandinsky_color(mp_obj_t red, mp_obj_t green, mp_obj_t blue);
 mp_obj_t modkandinsky_get_pixel(mp_obj_t x, mp_obj_t y);
 mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color);
 mp_obj_t modkandinsky_draw_string(mp_obj_t text, mp_obj_t x, mp_obj_t y);
+mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t *args);
diff --git a/python/port/mod/kandinsky/modkandinsky_table.c b/python/port/mod/kandinsky/modkandinsky_table.c
index ee402fd09..2a8e19c5c 100644
--- a/python/port/mod/kandinsky/modkandinsky_table.c
+++ b/python/port/mod/kandinsky/modkandinsky_table.c
@@ -4,6 +4,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_color_obj, modkandinsky_color);
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(modkandinsky_get_pixel_obj, modkandinsky_get_pixel);
 STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_set_pixel_obj, modkandinsky_set_pixel);
 STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_draw_string_obj, modkandinsky_draw_string);
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modkandinsky_fill_rect_obj, 5, 5, modkandinsky_fill_rect);
 
 STATIC const mp_rom_map_elem_t modkandinsky_module_globals_table[] = {
   { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_kandinsky) },
@@ -11,6 +12,7 @@ STATIC const mp_rom_map_elem_t modkandinsky_module_globals_table[] = {
   { MP_ROM_QSTR(MP_QSTR_get_pixel), (mp_obj_t)&modkandinsky_get_pixel_obj },
   { MP_ROM_QSTR(MP_QSTR_set_pixel), (mp_obj_t)&modkandinsky_set_pixel_obj },
   { MP_ROM_QSTR(MP_QSTR_draw_string), (mp_obj_t)&modkandinsky_draw_string_obj },
+  { MP_ROM_QSTR(MP_QSTR_fill_rect), (mp_obj_t)&modkandinsky_fill_rect_obj },
 };
 
 STATIC MP_DEFINE_CONST_DICT(modkandinsky_module_globals, modkandinsky_module_globals_table);

From ec50e75a3aae275abe8c0d811f4f9c92a0f50e3d Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 10:12:39 +0200
Subject: [PATCH 004/295] [python/kandinsky] Bubble-up input errors before
 switching to draw mode

---
 python/port/mod/kandinsky/modkandinsky.cpp | 41 +++++++++++-----------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index 3878f33a3..3fceb11d9 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -44,41 +44,42 @@ mp_obj_t modkandinsky_color(mp_obj_t red, mp_obj_t green, mp_obj_t blue) {
   );
 }
 
+/* Calling ExecutionEnvironment::displaySandbox() hides the console and switches
+ * to another mode. So it's a good idea to retrieve and handle input parameters
+ * before calling displaySandbox, otherwise error messages (such as TypeError)
+ * won't be visible until the user comes back to the console screen. */
+
 mp_obj_t modkandinsky_get_pixel(mp_obj_t x, mp_obj_t y) {
-  KDColor c = KDIonContext::sharedContext()->getPixel(
-    KDPoint(mp_obj_get_int(x), mp_obj_get_int(y))
-  );
+  KDPoint point(mp_obj_get_int(x), mp_obj_get_int(y));
+  KDColor c = KDIonContext::sharedContext()->getPixel(point);
   return TupleForRGB(c.red(), c.green(), c.blue());
 }
 
 mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color) {
+  KDPoint point(mp_obj_get_int(x), mp_obj_get_int(y));
+  KDColor kdColor = ColorForTuple(color);
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
-  KDIonContext::sharedContext()->setPixel(
-    KDPoint(mp_obj_get_int(x), mp_obj_get_int(y)),
-    ColorForTuple(color)
-  );
+  KDIonContext::sharedContext()->setPixel(point, kdColor);
   return mp_const_none;
 }
 
 mp_obj_t modkandinsky_draw_string(mp_obj_t text, mp_obj_t x, mp_obj_t y) {
+  const char * kdText = mp_obj_str_get_str(text);
+  KDPoint point(mp_obj_get_int(x), mp_obj_get_int(y));
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
-  KDIonContext::sharedContext()->drawString(
-    mp_obj_str_get_str(text),
-    KDPoint(mp_obj_get_int(x), mp_obj_get_int(y))
-  );
+  KDIonContext::sharedContext()->drawString(kdText, point);
   return mp_const_none;
 }
 
 mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t * args) {
-  MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
-  KDIonContext::sharedContext()->fillRect(
-    KDRect(
-      mp_obj_get_int(args[0]),
-      mp_obj_get_int(args[1]),
-      mp_obj_get_int(args[2]),
-      mp_obj_get_int(args[3])
-    ),
-    ColorForTuple(args[4])
+  KDRect rect(
+    mp_obj_get_int(args[0]),
+    mp_obj_get_int(args[1]),
+    mp_obj_get_int(args[2]),
+    mp_obj_get_int(args[3])
   );
+  KDColor color = ColorForTuple(args[4]);
+  MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
+  KDIonContext::sharedContext()->fillRect(rect, color);
   return mp_const_none;
 }

From 42f72eee7757172629848793c0efeeddff6e5aa6 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 10:24:38 +0200
Subject: [PATCH 005/295] [python/kandinsky] draw_string takes two optional
 colors (text/bg)

---
 python/port/mod/kandinsky/modkandinsky.cpp     | 10 ++++++----
 python/port/mod/kandinsky/modkandinsky.h       |  2 +-
 python/port/mod/kandinsky/modkandinsky_table.c |  2 +-
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/python/port/mod/kandinsky/modkandinsky.cpp b/python/port/mod/kandinsky/modkandinsky.cpp
index 3fceb11d9..eacc184ae 100644
--- a/python/port/mod/kandinsky/modkandinsky.cpp
+++ b/python/port/mod/kandinsky/modkandinsky.cpp
@@ -63,11 +63,13 @@ mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color) {
   return mp_const_none;
 }
 
-mp_obj_t modkandinsky_draw_string(mp_obj_t text, mp_obj_t x, mp_obj_t y) {
-  const char * kdText = mp_obj_str_get_str(text);
-  KDPoint point(mp_obj_get_int(x), mp_obj_get_int(y));
+mp_obj_t modkandinsky_draw_string(size_t n_args, const mp_obj_t * args) {
+  const char * text = mp_obj_str_get_str(args[0]);
+  KDPoint point(mp_obj_get_int(args[1]), mp_obj_get_int(args[2]));
+  KDColor textColor = (n_args >= 4) ? ColorForTuple(args[3]) : KDColorBlack;
+  KDColor backgroundColor = (n_args >= 5) ? ColorForTuple(args[4]) : KDColorWhite;
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
-  KDIonContext::sharedContext()->drawString(kdText, point);
+  KDIonContext::sharedContext()->drawString(text, point, KDFont::LargeFont, textColor, backgroundColor);
   return mp_const_none;
 }
 
diff --git a/python/port/mod/kandinsky/modkandinsky.h b/python/port/mod/kandinsky/modkandinsky.h
index 11bc43b0b..c346650cd 100644
--- a/python/port/mod/kandinsky/modkandinsky.h
+++ b/python/port/mod/kandinsky/modkandinsky.h
@@ -3,5 +3,5 @@
 mp_obj_t modkandinsky_color(mp_obj_t red, mp_obj_t green, mp_obj_t blue);
 mp_obj_t modkandinsky_get_pixel(mp_obj_t x, mp_obj_t y);
 mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color);
-mp_obj_t modkandinsky_draw_string(mp_obj_t text, mp_obj_t x, mp_obj_t y);
+mp_obj_t modkandinsky_draw_string(size_t n_args, const mp_obj_t *args);
 mp_obj_t modkandinsky_fill_rect(size_t n_args, const mp_obj_t *args);
diff --git a/python/port/mod/kandinsky/modkandinsky_table.c b/python/port/mod/kandinsky/modkandinsky_table.c
index 2a8e19c5c..802bee555 100644
--- a/python/port/mod/kandinsky/modkandinsky_table.c
+++ b/python/port/mod/kandinsky/modkandinsky_table.c
@@ -3,7 +3,7 @@
 STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_color_obj, modkandinsky_color);
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(modkandinsky_get_pixel_obj, modkandinsky_get_pixel);
 STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_set_pixel_obj, modkandinsky_set_pixel);
-STATIC MP_DEFINE_CONST_FUN_OBJ_3(modkandinsky_draw_string_obj, modkandinsky_draw_string);
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modkandinsky_draw_string_obj, 3, 5, modkandinsky_draw_string);
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modkandinsky_fill_rect_obj, 5, 5, modkandinsky_fill_rect);
 
 STATIC const mp_rom_map_elem_t modkandinsky_module_globals_table[] = {

From 8308068b694b397bbcc92ca3552541ec55ffa233 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 17 Apr 2019 11:20:09 +0200
Subject: [PATCH 006/295] [apps/code] Add catalog entry for kandinsky.fill_rect

---
 apps/code/catalog.de.i18n        | 1 +
 apps/code/catalog.en.i18n        | 1 +
 apps/code/catalog.es.i18n        | 1 +
 apps/code/catalog.fr.i18n        | 1 +
 apps/code/catalog.pt.i18n        | 1 +
 apps/code/catalog.universal.i18n | 1 +
 apps/code/python_toolbox.cpp     | 4 +++-
 7 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/apps/code/catalog.de.i18n b/apps/code/catalog.de.i18n
index 2bbcd18ff..e5a0be097 100644
--- a/apps/code/catalog.de.i18n
+++ b/apps/code/catalog.de.i18n
@@ -36,6 +36,7 @@ PythonEval = "Returns the evaluated expression"
 PythonExp = "Exponential function"
 PythonExpm1 = "Compute exp(x)-1"
 PythonFabs = "Absolute value"
+PythonFillRect = "Fill a rectangle at pixel (x,y)"
 PythonFloat = "Convert x to a float"
 PythonFloor = "Floor"
 PythonFmod = "a modulo b"
diff --git a/apps/code/catalog.en.i18n b/apps/code/catalog.en.i18n
index d9ec7bfad..4fd635083 100644
--- a/apps/code/catalog.en.i18n
+++ b/apps/code/catalog.en.i18n
@@ -36,6 +36,7 @@ PythonEval = "Returns the evaluated expression"
 PythonExp = "Exponential function"
 PythonExpm1 = "Compute exp(x)-1"
 PythonFabs = "Absolute value"
+PythonFillRect = "Fill a rectangle at pixel (x,y)"
 PythonFloat = "Convert x to a float"
 PythonFloor = "Floor"
 PythonFmod = "a modulo b"
diff --git a/apps/code/catalog.es.i18n b/apps/code/catalog.es.i18n
index d9ec7bfad..4fd635083 100644
--- a/apps/code/catalog.es.i18n
+++ b/apps/code/catalog.es.i18n
@@ -36,6 +36,7 @@ PythonEval = "Returns the evaluated expression"
 PythonExp = "Exponential function"
 PythonExpm1 = "Compute exp(x)-1"
 PythonFabs = "Absolute value"
+PythonFillRect = "Fill a rectangle at pixel (x,y)"
 PythonFloat = "Convert x to a float"
 PythonFloor = "Floor"
 PythonFmod = "a modulo b"
diff --git a/apps/code/catalog.fr.i18n b/apps/code/catalog.fr.i18n
index 109faebe0..30a6247b1 100644
--- a/apps/code/catalog.fr.i18n
+++ b/apps/code/catalog.fr.i18n
@@ -36,6 +36,7 @@ PythonEval = "Evalue l'expression en argument "
 PythonExp = "Fonction exponentielle"
 PythonExpm1 = "Calcul de exp(x)-1"
 PythonFabs = "Valeur absolue"
+PythonFillRect = "Remplit un rectangle"
 PythonFloat = "Conversion en flottant"
 PythonFloor = "Partie entière"
 PythonFmod = "a modulo b"
diff --git a/apps/code/catalog.pt.i18n b/apps/code/catalog.pt.i18n
index 2d0210552..fd30d2b90 100644
--- a/apps/code/catalog.pt.i18n
+++ b/apps/code/catalog.pt.i18n
@@ -36,6 +36,7 @@ PythonEval = "Returns the evaluated expression"
 PythonExp = "Exponential function"
 PythonExpm1 = "Compute exp(x)-1"
 PythonFabs = "Absolute value"
+PythonFillRect = "Fill a rectangle at pixel (x,y)"
 PythonFloat = "Convert x to a float"
 PythonFloor = "Floor"
 PythonFmod = "a modulo b"
diff --git a/apps/code/catalog.universal.i18n b/apps/code/catalog.universal.i18n
index d1e47d336..9052cee93 100644
--- a/apps/code/catalog.universal.i18n
+++ b/apps/code/catalog.universal.i18n
@@ -38,6 +38,7 @@ PythonCommandExp = "exp(x)"
 PythonCommandExpComplex = "exp(z)"
 PythonCommandExpm1 = "expm1(x)"
 PythonCommandFabs = "fabs(x)"
+PythonCommandFillRect = "fill_rect(x,y,width,height,color)"
 PythonCommandFloat = "float(x)"
 PythonCommandFloor = "floor(x)"
 PythonCommandFmod = "fmod(a,b)"
diff --git a/apps/code/python_toolbox.cpp b/apps/code/python_toolbox.cpp
index 1a3ed9916..771f5624b 100644
--- a/apps/code/python_toolbox.cpp
+++ b/apps/code/python_toolbox.cpp
@@ -99,7 +99,8 @@ const ToolboxMessageTree KandinskyModuleChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandGetPixel, I18n::Message::PythonGetPixel),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandSetPixel, I18n::Message::PythonSetPixel),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandColor, I18n::Message::PythonColor),
-  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandDrawString, I18n::Message::PythonDrawString)
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandDrawString, I18n::Message::PythonDrawString),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandFillRect, I18n::Message::PythonFillRect)
 };
 
 const ToolboxMessageTree RandomModuleChildren[] = {
@@ -216,6 +217,7 @@ const ToolboxMessageTree catalogChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandExp, I18n::Message::PythonExp),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandExpm1, I18n::Message::PythonExpm1),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandFabs, I18n::Message::PythonFabs),
+  ToolboxMessageTree::Leaf(I18n::Message::PythonCommandFillRect, I18n::Message::PythonFillRect),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandFloat, I18n::Message::PythonFloat),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandFloor, I18n::Message::PythonFloor),
   ToolboxMessageTree::Leaf(I18n::Message::PythonTurtleCommandForward, I18n::Message::PythonTurtleForward),

From e7d2c61cec8c6233ced5651e2493bc07b4e23816 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 29 Apr 2019 16:33:52 +0200
Subject: [PATCH 007/295] [apps/regression] Increase the iterations limit to
 compute a regression

The exponential regression on the following data now works:
1 120000
3 130000
6 150000
8 160000
---
 apps/regression/model/model.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/regression/model/model.h b/apps/regression/model/model.h
index 86e586ee5..60a4e5470 100644
--- a/apps/regression/model/model.h
+++ b/apps/regression/model/model.h
@@ -47,7 +47,7 @@ private:
   virtual double partialDerivate(double * modelCoefficients, int derivateCoefficientIndex, double x) const = 0;
 
   // Levenberg-Marquardt
-  static constexpr double k_maxIterations = 100;
+  static constexpr double k_maxIterations = 300;
   static constexpr double k_maxMatrixInversionFixIterations = 10;
   static constexpr double k_initialLambda = 0.001;
   static constexpr double k_lambdaFactor = 10;

From 25456b7973386dd2f4d4e39e1d12b2ed56950547 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 31 Oct 2018 10:28:57 +0100
Subject: [PATCH 008/295] [kandinsky] Assume UTF-8 encoding for strings

---
 kandinsky/include/kandinsky/font.h            |  67 +++++----
 .../include/kandinsky/unicode/codepoint.h     |  23 ++++
 .../include/kandinsky/unicode/utf8decoder.h   |  14 ++
 kandinsky/src/context_text.cpp                |  35 +++--
 kandinsky/src/font.cpp                        | 130 +++++++++++++++---
 kandinsky/src/unicode/utf8decoder.cpp         |  26 ++++
 6 files changed, 237 insertions(+), 58 deletions(-)
 create mode 100644 kandinsky/include/kandinsky/unicode/codepoint.h
 create mode 100644 kandinsky/include/kandinsky/unicode/utf8decoder.h
 create mode 100644 kandinsky/src/unicode/utf8decoder.cpp

diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index a4ae9c786..5d2a571e9 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -2,13 +2,15 @@
 #define KANDINSKY_FONT_H
 
 #include <stdint.h>
+#include <stddef.h>
 #include <kandinsky/size.h>
 #include <kandinsky/coordinate.h>
+#include <kandinsky/unicode/codepoint.h>
 #include "palette.h"
 
 class KDFont {
 private:
-  static constexpr int k_bitsPerPixel = 4;
+  static constexpr int k_bitsPerPixel = 4; // TODO: Should be generated by the rasterizer
   static const KDFont privateLargeFont;
   static const KDFont privateSmallFont;
 public:
@@ -17,38 +19,57 @@ public:
 
   KDSize stringSize(const char * text) const;
 
+  union GlyphBuffer {
+  public:
+    GlyphBuffer() {} // Don't initialize either buffer
+    KDColor * colorBuffer() { return m_colors; }
+    uint8_t * greyscaleBuffer() { return m_greyscales; }
+    uint8_t * secondaryGreyscaleBuffer() { return m_greyscales + k_maxGlyphPixelCount; }
+  private:
+  private:
+    static constexpr int k_maxGlyphPixelCount = 180; //TODO: Should be generated by the rasterizer
+    uint8_t m_greyscales[2*k_maxGlyphPixelCount];
+    KDColor m_colors[k_maxGlyphPixelCount];
+  };
+
+  using GlyphIndex = uint8_t;
+  class CodepointIndexPair {
+  public:
+    constexpr CodepointIndexPair(Codepoint c, GlyphIndex i) : m_codepoint(c), m_glyphIndex(i) {}
+    Codepoint codepoint() const { return m_codepoint; }
+    GlyphIndex glyphIndex() const { return m_glyphIndex; }
+  private:
+    Codepoint m_codepoint;
+    GlyphIndex m_glyphIndex;
+  };
+  GlyphIndex indexForCodepoint(Codepoint c) const;
+
+  void setGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const;
+  void accumulateGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const;
+
   using RenderPalette = KDPalette<(1<<k_bitsPerPixel)>;
-  void fetchGlyphForChar(char c, const RenderPalette * renderPalette, KDColor * pixelBuffer) const;
+  void colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffer * glyphBuffer) const;
+
   RenderPalette renderPalette(KDColor textColor, KDColor backgroundColor) const {
     return RenderPalette::Gradient(textColor, backgroundColor);
   }
   KDSize glyphSize() const { return m_glyphSize; }
 
-  constexpr KDFont(KDCoordinate glyphWidth, KDCoordinate glyphHeight, const uint16_t * glyphDataOffset, const uint8_t * data) :
-    m_glyphSize(glyphWidth, glyphHeight), m_glyphDataOffset(glyphDataOffset), m_data(data) { }
+  constexpr KDFont(size_t tableLength, const CodepointIndexPair * table, KDCoordinate glyphWidth, KDCoordinate glyphHeight, const uint16_t * glyphDataOffset, const uint8_t * data) :
+    m_tableLength(tableLength), m_table(table), m_glyphSize(glyphWidth, glyphHeight), m_glyphDataOffset(glyphDataOffset), m_data(data) { }
 private:
-  void fetchGreyscaleGlyphForChar(char c, uint8_t * greyscaleBuffer) const;
+  void fetchGreyscaleGlyphAtIndex(GlyphIndex index, uint8_t * greyscaleBuffer) const;
 
-  const uint8_t * compressedGlyphData(char c) const {
-    return m_data + m_glyphDataOffset[charAsIndex(c)];
-  }
-  uint16_t compressedGlyphDataSize(char c) const {
-    return m_glyphDataOffset[charAsIndex(c)+1] - m_glyphDataOffset[charAsIndex(c)];
-  }
-  uint8_t charAsIndex(char c) const {
-    // FIXME: This is most likely false for chars greater than 127
-    return static_cast<uint8_t>(c) - k_magicCharOffsetValue;
-  }
-  int signedCharAsIndex(char c) const {
-    int cInt = c;
-    if (cInt < 0) {
-      /* A char casted as int takes its value between -127 and +128, but we want
-       * a positive value. -127 is thus 129, -126 is 130, etc. */
-      cInt=128+(cInt-(-127)+1);
-    }
-    return cInt - k_magicCharOffsetValue;
+  const uint8_t * compressedGlyphData(GlyphIndex index) const {
+    return m_data + m_glyphDataOffset[index];
   }
 
+  uint16_t compressedGlyphDataSize(GlyphIndex index) const {
+    return m_glyphDataOffset[index+1] - m_glyphDataOffset[index];
+  }
+
+  size_t m_tableLength;
+  const CodepointIndexPair * m_table;
   KDSize m_glyphSize;
   const uint16_t * m_glyphDataOffset;
   const uint8_t * m_data;
diff --git a/kandinsky/include/kandinsky/unicode/codepoint.h b/kandinsky/include/kandinsky/unicode/codepoint.h
new file mode 100644
index 000000000..323647cfe
--- /dev/null
+++ b/kandinsky/include/kandinsky/unicode/codepoint.h
@@ -0,0 +1,23 @@
+#ifndef KANDINSKY_UNICODE_CODEPOINT_H
+#define KANDINSKY_UNICODE_CODEPOINT_H
+
+#include <stdint.h>
+
+class Codepoint {
+public:
+  constexpr Codepoint(uint32_t c) : m_code(c) {}
+  operator uint16_t() const { return m_code; }
+
+
+  bool isCombining() const {
+    return (m_code >= 0x300 && m_code <= 0x036F);
+  }
+private:
+  uint32_t m_code;
+};
+
+static constexpr Codepoint Null = 0x0;
+static constexpr Codepoint Tabulation = 0x9;
+static constexpr Codepoint LineFeed = 0xA;
+
+#endif
diff --git a/kandinsky/include/kandinsky/unicode/utf8decoder.h b/kandinsky/include/kandinsky/unicode/utf8decoder.h
new file mode 100644
index 000000000..f9badc77f
--- /dev/null
+++ b/kandinsky/include/kandinsky/unicode/utf8decoder.h
@@ -0,0 +1,14 @@
+#ifndef KANDINSKY_UNICODE_UTF8DECODER_H
+#define KANDINSKY_UNICODE_UTF8DECODER_H
+
+#include "codepoint.h"
+
+class UTF8Decoder {
+public:
+  UTF8Decoder(const char * string) : m_string(string) {}
+  Codepoint nextCodepoint();
+private:
+  const char * m_string;
+};
+
+#endif
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index 8d401d773..6a4282f90 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -1,35 +1,44 @@
 #include <assert.h>
 #include <kandinsky/context.h>
 #include <kandinsky/font.h>
+#include <kandinsky/unicode/utf8decoder.h>
 
-constexpr int maxGlyphPixelCount = 180;
 constexpr static int k_tabCharacterWidth = 4;
 
 KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font, KDColor textColor, KDColor backgroundColor, int maxLength) {
-
   KDPoint position = p;
   KDSize glyphSize = font->glyphSize();
   KDFont::RenderPalette palette = font->renderPalette(textColor, backgroundColor);
 
-  KDColor glyph[maxGlyphPixelCount];
+  KDFont::GlyphBuffer glyphBuffer;
 
-  const char * end = text + maxLength;
-  while(*text != 0 && text != end) {
-    if (*text == '\n') {
+  UTF8Decoder decoder(text);
+  Codepoint codepoint = decoder.nextCodepoint();
+  while (codepoint != Null) {
+    if (codepoint == LineFeed) {
       position = KDPoint(0, position.y() + glyphSize.height());
-    } else if (*text == '\t') {
+      codepoint = decoder.nextCodepoint();
+    } else if (codepoint == Tabulation) {
       position = position.translatedBy(KDPoint(k_tabCharacterWidth * glyphSize.width(), 0));
+      codepoint = decoder.nextCodepoint();
     } else {
-      // Fetch and draw glyph for current char
-      font->fetchGlyphForChar(*text, &palette, glyph);
+      assert(!codepoint.isCombining());
+      font->setGlyphGreyscalesForCodepoint(codepoint, &glyphBuffer);
+      codepoint = decoder.nextCodepoint();
+      while (codepoint.isCombining()) {
+        font->accumulateGlyphGreyscalesForCodepoint(codepoint, &glyphBuffer);
+        codepoint = decoder.nextCodepoint();
+      }
+      font->colorizeGlyphBuffer(&palette, &glyphBuffer);
+      // Flush accumulated content
       fillRectWithPixels(
-        KDRect(position, glyphSize.width(), glyphSize.height()),
-        glyph,
-        glyph // It's OK to trash the content of glyph since we'll re-fetch it for the next char anyway
+        KDRect(position, glyphSize),
+        glyphBuffer.colorBuffer(),
+        glyphBuffer.colorBuffer() // It's OK to trash the content of the color buffer since we'll re-fetch it for the next char anyway
       );
       position = position.translatedBy(KDPoint(glyphSize.width(), 0));
     }
-    text++;
   }
+
   return position;
 }
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 38f947d7e..2e5a88321 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -1,6 +1,7 @@
 #include <assert.h>
 #include <kandinsky/font.h>
 #include <ion.h>
+#include <kandinsky/unicode/utf8decoder.h>
 
 constexpr static int k_tabCharacterWidth = 4;
 
@@ -9,39 +10,48 @@ KDSize KDFont::stringSize(const char * text) const {
     return KDSizeZero;
   }
   KDSize stringSize = KDSize(0, m_glyphSize.height());
-  while (*text != 0) {
+
+  UTF8Decoder decoder(text);
+  Codepoint codepoint = decoder.nextCodepoint();
+  while (codepoint != Null) {
     KDSize cSize = KDSize(m_glyphSize.width(), 0);
-    if (*text == '\t') {
-      cSize = KDSize(k_tabCharacterWidth*m_glyphSize.width(), 0);
-    }
-    if (*text == '\n') {
+    if (codepoint == LineFeed) {
       cSize = KDSize(0, m_glyphSize.height());
+      codepoint = decoder.nextCodepoint();
+    } else if (codepoint == Tabulation) {
+      cSize = KDSize(k_tabCharacterWidth*m_glyphSize.width(), 0);
+    } else if (codepoint.isCombining()) {
+      cSize = KDSizeZero;
     }
     stringSize = KDSize(stringSize.width()+cSize.width(), stringSize.height()+cSize.height());
-    text++;
+    codepoint = decoder.nextCodepoint();
   }
   return stringSize;
 }
 
-void KDFont::fetchGreyscaleGlyphForChar(char c, uint8_t * greyscaleBuffer) const {
+void KDFont::setGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const {
+  fetchGreyscaleGlyphAtIndex(indexForCodepoint(codepoint), glyphBuffer->greyscaleBuffer());
+}
+
+void KDFont::accumulateGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const {
+  uint8_t * greyscaleBuffer = glyphBuffer->greyscaleBuffer();
+  uint8_t * accumulationGreyscaleBuffer = glyphBuffer->secondaryGreyscaleBuffer();
+  fetchGreyscaleGlyphAtIndex(indexForCodepoint(codepoint), accumulationGreyscaleBuffer);
+  for (int i=0; i<m_glyphSize.width()*m_glyphSize.height(); i++) {
+    greyscaleBuffer[i] |= accumulationGreyscaleBuffer[i];
+  }
+}
+
+void KDFont::fetchGreyscaleGlyphAtIndex(KDFont::GlyphIndex index, uint8_t * greyscaleBuffer) const {
   Ion::decompress(
-    compressedGlyphData(c),
+    compressedGlyphData(index),
     greyscaleBuffer,
-    compressedGlyphDataSize(c),
+    compressedGlyphDataSize(index),
     m_glyphSize.width() * m_glyphSize.height() * k_bitsPerPixel/8
   );
 }
 
-void KDFont::fetchGlyphForChar(char c, const KDFont::RenderPalette * renderPalette, KDColor * pixelBuffer) const {
-  int pixelCount = m_glyphSize.width() * m_glyphSize.height() - 1;
-  int charIndex = signedCharAsIndex(c);
-  if (charIndex < 0 || charIndex >= k_numberOfGlyphs) {
-    // There is no data for this glyph
-    for (int i = 0; i < pixelCount; i++) {
-      pixelBuffer[i] = KDColorBlack;
-    }
-    return;
-  }
+void KDFont::colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffer * glyphBuffer) const {
   /* Since a greyscale value is smaller than a color value (see assertion), we
    * can store the temporary greyscale values in the output pixel buffer.
    * What's great is that now, if we fill the pixel buffer right-to-left with
@@ -49,8 +59,9 @@ void KDFont::fetchGlyphForChar(char c, const KDFont::RenderPalette * renderPalet
    * the remaining grayscale values since those are smaller. So we can avoid a
    * separate buffer for the temporary greyscale values. */
   assert(k_bitsPerPixel < 8*sizeof(KDColor));
-  uint8_t * greyscaleBuffer = reinterpret_cast<uint8_t *>(pixelBuffer);
-  fetchGreyscaleGlyphForChar(c, greyscaleBuffer);
+
+  uint8_t * greyscaleBuffer = glyphBuffer->greyscaleBuffer();
+  KDColor * colorBuffer = glyphBuffer->colorBuffer();
 
   uint8_t mask = (0xFF >> (8-k_bitsPerPixel));
   int pixelIndex = pixelCount; // Let's start at the final pixel
@@ -62,7 +73,82 @@ void KDFont::fetchGlyphForChar(char c, const KDFont::RenderPalette * renderPalet
       uint8_t greyscale = greyscaleByte & mask;
       greyscaleByte = greyscaleByte >> k_bitsPerPixel;
       assert(pixelIndex >= 0);
-      pixelBuffer[pixelIndex--] = renderPalette->colorAtIndex(greyscale);
+      colorBuffer[pixelIndex--] = renderPalette->colorAtIndex(greyscale);
     }
   }
 }
+
+KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
+#define USE_BINARY_SEARCH 0
+#if USE_BINARY_SEARCH
+  int lowerBound = 0;
+  int upperBound = m_tableLength;
+  while (true) {
+    int currentIndex = (lowerBound+upperBound)/2;
+    // printf("Considering %d in [%d,%d]\n", currentIndex, lowerBound, upperBound);
+    const CodepointIndexPair * currentPair = m_table + currentIndex;
+    const CodepointIndexPair * nextPair = currentIndex + 1 < m_tableLength ? currentPair + 1 : nullptr;
+    // printf("At this point, currentPair->codepoint() = %d and c = %d\n", currentPair->codepoint(), c);
+    if (currentPair->codepoint() == c) {
+      return currentPair->glyphIndex();
+    } else if (currentPair->codepoint() > c) {
+      // We need to look below
+      if (upperBound == currentIndex) {
+        // There's nothing below. Error out.
+        return 0;
+      }
+      upperBound = currentIndex;
+      continue;
+    } else if (nextPair == nullptr) {
+      return 0;
+    } else if (nextPair->codepoint() == c) {
+      return nextPair->glyphIndex();
+    } else if (nextPair->codepoint() < c) {
+      // We need to look above
+      if (lowerBound == currentIndex) {
+        // There's nothing above. Error out.
+        return 0;
+      }
+      lowerBound = currentIndex;
+      continue;
+    } else {
+      // At this point,
+      // currentPair->codepoint < c && nextPair != nullptr && nextPair->codepoint > c
+      // Yay, it's over!
+      // There can be an empty space between the currentPair and the nextPair
+      // e.g. currentPair(3,1) and nextPair(9, 4)
+      // means value at codepoints 3, 4, 5, 6, 7, 8, 9
+      //     are glyph identifiers 1, ?, ?, ?, ?, ?, 4
+      //                 solved as 1, 2, 3, 0, 0, 0, 4
+
+      // Let's hunt down the zeroes
+      Codepoint lastCodepointOfCurrentPair = currentPair->codepoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
+      if (c > lastCodepointOfCurrentPair) {
+        return 0;
+      }
+      return currentPair->glyphIndex() + (c - currentPair->codepoint());
+    }
+  }
+#else
+  const CodepointIndexPair * currentPair = m_table;
+  if (c < currentPair->codepoint()) {
+    return 0;
+  }
+  const CodepointIndexPair * endPair = m_table + m_tableLength - 1;
+  while (currentPair < endPair) {
+    const CodepointIndexPair * nextPair = currentPair + 1;
+    if (c < nextPair->codepoint()) {
+      Codepoint lastCodepointOfCurrentPair = currentPair->codepoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
+      if (c > lastCodepointOfCurrentPair) {
+        return 0;
+      }
+      return currentPair->glyphIndex() + (c - currentPair->codepoint());
+    }
+    currentPair = nextPair;
+  }
+  if (endPair->codepoint() == c) {
+    return endPair->glyphIndex();
+  }
+  return 0;
+#endif
+}
diff --git a/kandinsky/src/unicode/utf8decoder.cpp b/kandinsky/src/unicode/utf8decoder.cpp
new file mode 100644
index 000000000..e8585e9f8
--- /dev/null
+++ b/kandinsky/src/unicode/utf8decoder.cpp
@@ -0,0 +1,26 @@
+#include <kandinsky/unicode/utf8decoder.h>
+#include <assert.h>
+
+static inline int leading_ones(uint8_t value) {
+  for (int i=0; i<8; i++) {
+    if (!(value & 0x80)) {
+      return i;
+    }
+    value = value << 1;
+  }
+  assert(false);
+}
+
+static inline uint8_t last_k_bits(uint8_t value, uint8_t bits) {
+  return (value & ((1<<bits)-1));
+}
+
+Codepoint UTF8Decoder::nextCodepoint() {
+  int leadingOnes = leading_ones(*m_string);
+  uint32_t result = last_k_bits(*m_string++, 8-leadingOnes-1);
+  for (int i=0; i<(leadingOnes-1); i++) {
+    result <<= 6;
+    result += (*m_string++ & 0x3F);
+  }
+  return Codepoint(result);
+}

From 713e0f5426f7fb09561b13ebae2f232af1f1d774 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 31 Oct 2018 10:30:34 +0100
Subject: [PATCH 009/295] [kandinsky] The rasterizer encodes Unicode codepoints

---
 kandinsky/fonts/codepoints.h | 149 +++++++++++++++++++++++++++++++++++
 kandinsky/fonts/rasterizer.c | 118 +++++++++++++--------------
 2 files changed, 204 insertions(+), 63 deletions(-)
 create mode 100644 kandinsky/fonts/codepoints.h

diff --git a/kandinsky/fonts/codepoints.h b/kandinsky/fonts/codepoints.h
new file mode 100644
index 000000000..f039df1d8
--- /dev/null
+++ b/kandinsky/fonts/codepoints.h
@@ -0,0 +1,149 @@
+// [0x30a].map{|i| "0x" + i.to_s(16) +", // " + [i].pack("U") + " // " + Unicode::Name.of([i].pack("U"))}.join("|")
+#include <stdint.h>
+
+uint32_t Codepoints[] = {
+  0x20, //   // SPACE
+  0x21, // ! // EXCLAMATION MARK
+  0x22, // " // QUOTATION MARK
+  0x23, // # // NUMBER SIGN
+  0x24, // $ // DOLLAR SIGN
+  0x25, // % // PERCENT SIGN
+  0x26, // & // AMPERSAND
+  0x27, // ' // APOSTROPHE
+  0x28, // ( // LEFT PARENTHESIS
+  0x29, // ) // RIGHT PARENTHESIS
+  0x2a, // * // ASTERISK
+  0x2b, // + // PLUS SIGN
+  0x2c, // , // COMMA
+  0x2d, // - // HYPHEN-MINUS
+  0x2e, // . // FULL STOP
+  0x2f, // / // SOLIDUS
+  0x30, // 0 // DIGIT ZERO
+  0x31, // 1 // DIGIT ONE
+  0x32, // 2 // DIGIT TWO
+  0x33, // 3 // DIGIT THREE
+  0x34, // 4 // DIGIT FOUR
+  0x35, // 5 // DIGIT FIVE
+  0x36, // 6 // DIGIT SIX
+  0x37, // 7 // DIGIT SEVEN
+  0x38, // 8 // DIGIT EIGHT
+  0x39, // 9 // DIGIT NINE
+  0x3a, // : // COLON
+  0x3b, // ; // SEMICOLON
+  0x3c, // < // LESS-THAN SIGN
+  0x3d, // = // EQUALS SIGN
+  0x3e, // > // GREATER-THAN SIGN
+  0x3f, // ? // QUESTION MARK
+  0x40, // @ // COMMERCIAL AT
+  0x41, // A // LATIN CAPITAL LETTER A
+  0x42, // B // LATIN CAPITAL LETTER B
+  0x43, // C // LATIN CAPITAL LETTER C
+  0x44, // D // LATIN CAPITAL LETTER D
+  0x45, // E // LATIN CAPITAL LETTER E
+  0x46, // F // LATIN CAPITAL LETTER F
+  0x47, // G // LATIN CAPITAL LETTER G
+  0x48, // H // LATIN CAPITAL LETTER H
+  0x49, // I // LATIN CAPITAL LETTER I
+  0x4a, // J // LATIN CAPITAL LETTER J
+  0x4b, // K // LATIN CAPITAL LETTER K
+  0x4c, // L // LATIN CAPITAL LETTER L
+  0x4d, // M // LATIN CAPITAL LETTER M
+  0x4e, // N // LATIN CAPITAL LETTER N
+  0x4f, // O // LATIN CAPITAL LETTER O
+  0x50, // P // LATIN CAPITAL LETTER P
+  0x51, // Q // LATIN CAPITAL LETTER Q
+  0x52, // R // LATIN CAPITAL LETTER R
+  0x53, // S // LATIN CAPITAL LETTER S
+  0x54, // T // LATIN CAPITAL LETTER T
+  0x55, // U // LATIN CAPITAL LETTER U
+  0x56, // V // LATIN CAPITAL LETTER V
+  0x57, // W // LATIN CAPITAL LETTER W
+  0x58, // X // LATIN CAPITAL LETTER X
+  0x59, // Y // LATIN CAPITAL LETTER Y
+  0x5a, // Z // LATIN CAPITAL LETTER Z
+  0x5b, // [ // LEFT SQUARE BRACKET
+  0x5c, // \ // REVERSE SOLIDUS
+  0x5d, // ] // RIGHT SQUARE BRACKET
+  0x5e, // ^ // CIRCUMFLEX ACCENT
+  0x5f, // _ // LOW LINE
+  0x60, // ` // GRAVE ACCENT
+  0x61, // a // LATIN SMALL LETTER A
+  0x62, // b // LATIN SMALL LETTER B
+  0x63, // c // LATIN SMALL LETTER C
+  0x64, // d // LATIN SMALL LETTER D
+  0x65, // e // LATIN SMALL LETTER E
+  0x66, // f // LATIN SMALL LETTER F
+  0x67, // g // LATIN SMALL LETTER G
+  0x68, // h // LATIN SMALL LETTER H
+  0x69, // i // LATIN SMALL LETTER I
+  0x6a, // j // LATIN SMALL LETTER J
+  0x6b, // k // LATIN SMALL LETTER K
+  0x6c, // l // LATIN SMALL LETTER L
+  0x6d, // m // LATIN SMALL LETTER M
+  0x6e, // n // LATIN SMALL LETTER N
+  0x6f, // o // LATIN SMALL LETTER O
+  0x70, // p // LATIN SMALL LETTER P
+  0x71, // q // LATIN SMALL LETTER Q
+  0x72, // r // LATIN SMALL LETTER R
+  0x73, // s // LATIN SMALL LETTER S
+  0x74, // t // LATIN SMALL LETTER T
+  0x75, // u // LATIN SMALL LETTER U
+  0x76, // v // LATIN SMALL LETTER V
+  0x77, // w // LATIN SMALL LETTER W
+  0x78, // x // LATIN SMALL LETTER X
+  0x79, // y // LATIN SMALL LETTER Y
+  0x7a, // z // LATIN SMALL LETTER Z
+  0x7b, // { // LEFT CURLY BRACKET
+  0x7c, // | // VERTICAL LINE
+  0x7d, // } // RIGHT CURLY BRACKET
+  0x7e, // ~ // TILDE
+
+  0xb0, // ° // DEGREE SIGN
+  0xb5, // µ // MICRO SIGN
+  0xb7, // · // MIDDLE DOT
+
+  0xc6, // Æ // LATIN CAPITAL LETTER AE
+  0xd0, // Ð // LATIN CAPITAL LETTER ETH
+  0xd7, // × // MULTIPLICATION SIGN
+  0xd8, // Ø // LATIN CAPITAL LETTER O WITH STROKE
+  0xde, // Þ // LATIN CAPITAL LETTER THORN
+  0xdf, // ß // LATIN SMALL LETTER SHARP S
+  0xe6, // æ // LATIN SMALL LETTER AE
+  0xf0, // ð // LATIN SMALL LETTER ETH
+  0xf7, // ÷ // DIVISION SIGN
+  0xf8, // ø // LATIN SMALL LETTER O WITH STROKE
+  0xfe, // þ // LATIN SMALL LETTER THORN
+
+  0x300, //  ̀ // COMBINING GRAVE ACCENT
+  0x301, //  ́ // COMBINING ACUTE ACCENT
+  0x302, //  ̂ // COMBINING CIRCUMFLEX ACCENT
+  0x303, //  ̃ // COMBINING TILDE
+  0x304, //  ̄ // COMBINING MACRON
+  0x308, //  ̈ // COMBINING DIAERESIS
+  0x30a, //  ̊ // COMBINING RING ABOVE
+  0x327, //  ̧ // COMBINING CEDILLA
+
+  0x393,   // Γ // GREEK CAPITAL LETTER GAMMA
+  0x394,   // Δ // GREEK CAPITAL LETTER DELTA
+  0x3b8,   // θ // GREEK SMALL LETTER THETA
+  0x3bb,   // λ // GREEK SMALL LETTER LAMDA
+  0x3c0,   // π // GREEK SMALL LETTER PI
+  0x3c3,   // σ // GREEK SMALL LETTER SIGMA
+  0x1d07,  // ᴇ // LATIN LETTER SMALL CAPITAL E
+  0x212f,  // ℯ // SCRIPT SMALL E
+  0x2192,  // → // RIGHTWARDS ARROW
+  0x2211,  // ∑ // N-ARY SUMMATION
+  0x221a,  // √ // SQUARE ROOT
+  0x222b,  // ∫ // INTEGRAL
+  0x2248,  // ≈ // ALMOST EQUAL TO
+  0x2264,  // ≤ // LESS-THAN OR EQUAL TO
+  0x2265,  // ≥ // GREATER-THAN OR EQUAL TO
+  0x1d422, // 𝐢 // MATHEMATICAL BOLD SMALL I"
+
+  // Apostrophe
+  // Xbar
+  // Ybar
+
+};
+
+int NumberOfCodepoints = sizeof(Codepoints)/sizeof(Codepoints[0]);
diff --git a/kandinsky/fonts/rasterizer.c b/kandinsky/fonts/rasterizer.c
index baafd3b4e..5903adfdf 100644
--- a/kandinsky/fonts/rasterizer.c
+++ b/kandinsky/fonts/rasterizer.c
@@ -16,6 +16,7 @@
 #include FT_FREETYPE_H
 
 #include "unicode_for_symbol.h"
+#include "codepoints.h"
 #include "../../ion/src/external/lz4/lz4hc.h"
 
 
@@ -40,18 +41,6 @@ typedef struct {
 void writeImageToPNGFile(image_t * image, char * filename);
 #endif
 
-#define CHARACTER_RANGE_START 0x20
-#define CHARACTER_RANGE_END 0x7E
-#define CHARACTER_COUNT (CHARACTER_RANGE_END-CHARACTER_RANGE_START+1)
-#define GLYPH_COUNT (CHARACTER_COUNT + NUMBER_OF_SYMBOLS)
-
-#define GRID_WIDTH 19
-#define GRID_HEIGHT 8
-
-#if (GRID_WIDTH*GRID_HEIGHT < GLYPH_COUNT)
-#error Grid too small. Consider increasing GRID_WIDTH or GRID_HEIGHT
-#endif
-
 void drawGlyphInImage(FT_Bitmap * glyphBitmap, image_t * image, int x, int y);
 static void prettyPrintArray(FILE * stream, int maxWidth, int typeSize, void * array, int numberOfElements);
 
@@ -105,24 +94,9 @@ int main(int argc, char * argv[]) {
   int maxWidth = 0;
   int maxAboveBaseline = 0;
   int maxBelowBaseline = 0;
-  for (unsigned char character = CHARACTER_RANGE_START; character <= CHARACTER_RANGE_END; character++) {
-    ENSURE(!FT_Load_Char(face, character, FT_LOAD_RENDER), "Loading character 0x%02x", character);
-    int aboveBaseline = face->glyph->bitmap_top;
-    int belowBaseline = face->glyph->bitmap.rows - face->glyph->bitmap_top;
-    int width = face->glyph->bitmap_left + face->glyph->bitmap.width;
-    if (width > maxWidth) {
-      maxWidth = width;
-    }
-    if (aboveBaseline > maxAboveBaseline) {
-      maxAboveBaseline = aboveBaseline;
-    }
-    if (belowBaseline > maxBelowBaseline) {
-      maxBelowBaseline = belowBaseline;
-    }
-  }
-  for (int charIndex = 0; charIndex < NUMBER_OF_SYMBOLS; charIndex++) {
-    wchar_t wideChar = codePointForSymbol[charIndex];
-    ENSURE(!FT_Load_Char(face, wideChar, FT_LOAD_RENDER), "Loading character 0x%02x", wideChar);
+  for (int i=0; i < NumberOfCodepoints; i++) {
+    wchar_t codepoint = Codepoints[i];
+    ENSURE(!FT_Load_Char(face, codepoint, FT_LOAD_RENDER), "Loading character 0x%02x", codepoint);
     int aboveBaseline = face->glyph->bitmap_top;
     int belowBaseline = face->glyph->bitmap.rows - face->glyph->bitmap_top;
     int width = face->glyph->bitmap_left + face->glyph->bitmap.width;
@@ -142,9 +116,11 @@ int main(int argc, char * argv[]) {
   //printf("Actual glyph size = %dx%d\n", glyph_width, glyph_height);
 
   int grid_size = 1;
+  int grid_width = 20;
+  int grid_height = ((NumberOfCodepoints-1)/grid_width)+1;
 
-  bitmap_image.width = GRID_WIDTH*glyph_width+(GRID_WIDTH-1)*grid_size;
-  bitmap_image.height = GRID_HEIGHT*glyph_height+(GRID_HEIGHT-1)*grid_size;
+  bitmap_image.width = grid_width*glyph_width+(grid_width-1)*grid_size;
+  bitmap_image.height = grid_height*glyph_height+(grid_height-1)*grid_size;
   bitmap_image.pixels = malloc(sizeof(pixel_t)*bitmap_image.width*bitmap_image.height);
   ENSURE(bitmap_image.pixels != NULL, "Allocating bitmap image of size %dx%d at %ld bytes per pixel", bitmap_image.width, bitmap_image.height, sizeof(pixel_t));
 
@@ -159,30 +135,23 @@ int main(int argc, char * argv[]) {
     }
   }
 
-  // We're doing the ASCII table, so characters from 0 to 255 inclusive
-  for (unsigned char character = CHARACTER_RANGE_START; character <= CHARACTER_RANGE_END; character++) {
-    int x = (character-CHARACTER_RANGE_START)%(GRID_WIDTH);
-    int y = (character-CHARACTER_RANGE_START)/(GRID_WIDTH);
+  for (int i=0; i<NumberOfCodepoints; i++) {
+    wchar_t codepoint = Codepoints[i];
+    int x = i%grid_width;
+    int y = i/grid_width;
     // FT_LOAD_RENDER: Render the glyph upon load
-    ENSURE(!FT_Load_Char(face, character, FT_LOAD_RENDER), "Loading character 0x%02x", character);
+    ENSURE(!FT_Load_Char(face, codepoint, FT_LOAD_RENDER), "Loading character 0x%08x", codepoint);
     //printf("Advances = %dx%d\n", face->glyph->bitmap_left, face->glyph->bitmap_top);
+    while (face->glyph->bitmap_left < 0) {
+      // This is a workaround for combining glyphs.
+      // For some reason, FreeType does a fun hack and yields a negative bitmap_left
+      // This way, the glyph automagically combines with the previous one. That's neat,
+      // but we don't want to do that.
+      face->glyph->bitmap_left += glyph_width;
+    }
     drawGlyphInImage(&face->glyph->bitmap,
         &bitmap_image,
-        x*(glyph_width+grid_size) + face->glyph->bitmap_left,
-        y*(glyph_height+grid_size) + maxAboveBaseline - face->glyph->bitmap_top
-    );
-  }
-  // We are now using unicode to access non-ASCII characters
-  for (int charIndex = 0; charIndex < NUMBER_OF_SYMBOLS; charIndex++) {
-    wchar_t wideChar = codePointForSymbol[charIndex];
-    int x = (charIndex+1+CHARACTER_RANGE_END-CHARACTER_RANGE_START)%(GRID_WIDTH);
-    int y = (charIndex+1+CHARACTER_RANGE_END-CHARACTER_RANGE_START)/(GRID_WIDTH);
-    // FT_LOAD_RENDER: Render the glyph upon load
-    ENSURE(!FT_Load_Char(face, wideChar, FT_LOAD_RENDER), "Loading character 0x%02x", wideChar);
-    //printf("Advances = %dx%d\n", face->glyph->bitmap_left, face->glyph->bitmap_top);
-    drawGlyphInImage(&face->glyph->bitmap,
-        &bitmap_image,
-        x*(glyph_width+grid_size) + face->glyph->bitmap_left,
+        x*(glyph_width+grid_size)  + face->glyph->bitmap_left,
         y*(glyph_height+grid_size) + maxAboveBaseline - face->glyph->bitmap_top
     );
   }
@@ -195,6 +164,29 @@ int main(int argc, char * argv[]) {
 
   fprintf(sourceFile, "/* This file is auto-generated by the rasterizer */\n\n");
   fprintf(sourceFile, "#include <kandinsky/font.h>\n\n");
+
+  // Step 1 - Build the GlyphIndex <-> UnicodeCodepoint correspondance table
+
+  int previousIndex = -1;
+  uint32_t previousCodepoint = 0;
+  int numberOfPairs = 0;
+
+  fprintf(sourceFile, "static constexpr KDFont::CodepointIndexPair table[] = {\n");
+  for (int i=0; i<NumberOfCodepoints; i++) {
+    int currentCodepoint = Codepoints[i];
+    if (currentCodepoint != (previousCodepoint + (i-previousIndex))) {
+      fprintf(sourceFile, "  KDFont::CodepointIndexPair(0x%x, %d),\n", currentCodepoint, i);
+      previousCodepoint = currentCodepoint;
+      previousIndex = i;
+      numberOfPairs++;
+    }
+  }
+  fprintf(sourceFile, "};\n\n");
+
+  fprintf(sourceFile, "static constexpr size_t tableLength = %d;\n\n", numberOfPairs);
+
+  // Step 2 - Build Glyph data
+
   fprintf(sourceFile, "static constexpr KDCoordinate glyphWidth = %d;\n\n", glyph_width);
   fprintf(sourceFile, "static constexpr KDCoordinate glyphHeight = %d;\n\n", glyph_height);
 
@@ -203,14 +195,14 @@ int main(int argc, char * argv[]) {
   int sizeOfUncompressedGlyphBuffer = glyph_width * glyph_height * greyscaleBitsPerPixel/8;
   uint8_t * uncompressedGlyphBuffer = (uint8_t *)malloc(sizeOfUncompressedGlyphBuffer);
 
-  uint16_t glyphDataOffset[GLYPH_COUNT+1];
-  int maxGlyphDataSize = GLYPH_COUNT* sizeOfUncompressedGlyphBuffer;
+  uint16_t glyphDataOffset[NumberOfCodepoints+1];
+  int maxGlyphDataSize = NumberOfCodepoints* sizeOfUncompressedGlyphBuffer;
   uint8_t * glyphData = (uint8_t *)malloc(maxGlyphDataSize);
   uint16_t lastOffset = 0;
 
-  for (int character = 0; character < GLYPH_COUNT; character++) {
-    int characterX = (character%GRID_WIDTH * (glyph_width+grid_size));
-    int characterY = (character/GRID_WIDTH * (glyph_height+grid_size));
+  for (int character = 0; character < NumberOfCodepoints; character++) {
+    int characterX = (character%grid_width * (glyph_width+grid_size));
+    int characterY = (character/grid_width * (glyph_height+grid_size));
     uint8_t accumulator = 0;
     int uncompressedGlyphBufferIndex = 0;
     int numberOfValuesAccumulated = 0;
@@ -244,16 +236,16 @@ int main(int argc, char * argv[]) {
     glyphDataOffset[character] = lastOffset;
     lastOffset += sizeOfCompressedGlyphBuffer;
   }
-  glyphDataOffset[GLYPH_COUNT] = lastOffset;
+  glyphDataOffset[NumberOfCodepoints] = lastOffset;
 
-  fprintf(sourceFile, "static constexpr uint16_t glyphDataOffset[%d] = {", GLYPH_COUNT+1);
-  prettyPrintArray(sourceFile, 80, 2, glyphDataOffset, GLYPH_COUNT+1);
+  fprintf(sourceFile, "static constexpr uint16_t glyphDataOffset[%d] = {", NumberOfCodepoints+1);
+  prettyPrintArray(sourceFile, 80, 2, glyphDataOffset, NumberOfCodepoints+1);
   fprintf(sourceFile, "};\n\n");
 
   size_t finalDataSize = lastOffset;
-  size_t initialDataSize = GLYPH_COUNT * glyph_width * glyph_height;
+  size_t initialDataSize = NumberOfCodepoints * glyph_width * glyph_height;
 
-  fprintf(sourceFile, "/* Rasterized  = %5zu bytes (%d glyphs x %d pixels)\n", initialDataSize, GLYPH_COUNT, glyph_width*glyph_height);
+  fprintf(sourceFile, "/* Rasterized  = %5zu bytes (%d glyphs x %d pixels)\n", initialDataSize, NumberOfCodepoints, glyph_width*glyph_height);
   fprintf(sourceFile, " * Downsampled = %5lu bytes (1/%d of rasterized)\n", initialDataSize*greyscaleBitsPerPixel/8, 8/greyscaleBitsPerPixel);
   fprintf(sourceFile, " * Compressed  = %5zu bytes (%.2f%% of rasterized) */\n", finalDataSize, 100.0*finalDataSize/initialDataSize);
 
@@ -264,7 +256,7 @@ int main(int argc, char * argv[]) {
   free(glyphData);
   free(uncompressedGlyphBuffer);
 
-  fprintf(sourceFile, "const KDFont KDFont::private%s(glyphWidth, glyphHeight, glyphDataOffset, glyphData);\n", font_name);
+  fprintf(sourceFile, "const KDFont KDFont::private%s(tableLength, table, glyphWidth, glyphHeight, glyphDataOffset, glyphData);\n", font_name);
 
   fclose(sourceFile);
 

From bf0d947939623834ed94bd38665fb6058bf75db6 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 31 Oct 2018 10:37:41 +0100
Subject: [PATCH 010/295] [i18n] Encode strings as NFKD-normalized UTF-8
 strings

---
 apps/i18n.py | 62 +++++++++++++++++++---------------------------------
 1 file changed, 23 insertions(+), 39 deletions(-)

diff --git a/apps/i18n.py b/apps/i18n.py
index 93ec034c9..dd307b8ba 100644
--- a/apps/i18n.py
+++ b/apps/i18n.py
@@ -1,4 +1,6 @@
-#coding=utf-8
+# This script gather all .i18n files and aggregates them as a pair of .h/.cpp file
+# In practice, it enforces a NFKD normalization
+# It works with Python 2 and Python 3
 
 import sys
 import re
@@ -6,42 +8,8 @@ import unicodedata
 import argparse
 import io
 
-ion_special_characters = {
-    u'Δ': "Ion::Charset::CapitalDelta",
-    u'Σ': "Ion::Charset::CapitalSigma",
-    u'λ': "Ion::Charset::SmallLambda",
-    u'μ': "Ion::Charset::SmallMu",
-    u'σ': "Ion::Charset::SmallSigma",
-    u'≤': "Ion::Charset::LessEqual",
-    u'≈': "Ion::Charset::AlmostEqual",
-    u'ø': "Ion::Charset::Empty",
-    u'•': "Ion::Charset::MiddleDot"
-}
-
-def ion_char(i18n_letter):
-    if i18n_letter == '\'':
-        return "'\\\''"
-    if ord(i18n_letter) < 128:
-        return "'" + i18n_letter + "'"
-    if i18n_letter in ion_special_characters:
-        return ion_special_characters[i18n_letter]
-    normalized = unicodedata.normalize("NFD", i18n_letter).encode('ascii', 'ignore')
-    #sys.stderr.write("Warning: Normalizing unicode character \"" + i18n_letter + "\" -> \"" + normalized + "\"\n")
-    return "'" + normalized.decode() + "'"
-
 def source_definition(i18n_string):
-    ion_characters = []
-    i = 0
-    while i < len(i18n_string):
-        if i18n_string[i] == '\\':
-            i = i+1
-            newChar = "'\\"+i18n_string[i]+"'"
-            ion_characters.append(newChar)
-        else:
-            ion_characters.append(ion_char(i18n_string[i]))
-        i = i+1
-    ion_characters.append("0")
-    return "{" + ", ".join(ion_characters) + "}"
+    return (u"\"" + unicodedata.normalize("NFKD", i18n_string) + u"\"").encode("utf-8")
 
 def split_line(line):
     match = re.match(r"^(\w+)\s*=\s*\"(.*)\"$", line)
@@ -78,7 +46,7 @@ def parse_files(files):
     return {"messages": sorted(messages), "universal_messages": sorted(universal_messages), "data": data}
 
 def print_header(data, path, locales):
-    f = open(path, 'w')
+    f = open(path, "w")
     f.write("#ifndef APPS_I18N_H\n")
     f.write("#define APPS_I18N_H\n\n")
     f.write("// This file is auto-generated by i18n.py\n\n")
@@ -114,7 +82,7 @@ def print_header(data, path, locales):
     f.close()
 
 def print_implementation(data, path, locales):
-    f = open(path, 'w')
+    f = open(path, "w")
     f.write("#include \"i18n.h\"\n")
     f.write("#include <apps/global_preferences.h>\n")
     f.write("#include <assert.h>\n\n");
@@ -141,7 +109,11 @@ def print_implementation(data, path, locales):
             if not message in data["data"][locale]:
                 sys.stderr.write("Error: Undefined key \"" + message + "\" for locale \"" + locale + "\"\n")
                 sys.exit(-1)
-            f.write("constexpr static char " + locale + message + "[] = " + data["data"][locale][message] + ";\n")
+            f.write("constexpr static char " + locale + message + "[] = ")
+            f = open(path, "ab") # Re-open the file as binary to output raw UTF-8 bytes
+            f.write(data["data"][locale][message])
+            f = open(path, "a") # Re-open the file as text
+            f.write(";\n")
     f.write("\n")
     f.write("constexpr static const char * messages[%d][%d] = {\n" % (len(data["messages"]), len(locales)))
     for message in data["messages"]:
@@ -152,6 +124,18 @@ def print_implementation(data, path, locales):
     f.write("};\n\n")
 
     # Write the translate method
+    for message in data["universal_messages"]:
+        f.write("constexpr static char universal" + message + "[] = ")
+        f = open(path, "ab") # Re-open the file as binary to output raw UTF-8 bytes
+        f.write(data["data"]["universal"][message])
+        f = open(path, "a") # Re-open the file as text
+        f.write(";\n")
+    f.write("\n")
+    f.write("constexpr static const char * universalMessages[%d] = {\n" % len(data["universal_messages"]))
+    for message in data["universal_messages"]:
+        f.write("  universal" + message + ",\n")
+    f.write("};\n")
+    f.write("\n")
     f.write("const char * translate(Message m, Language l) {\n")
     f.write("  assert(m != Message::LocalizedMessageMarker);\n")
     f.write("  int localizedMessageOffset = (int)Message::LocalizedMessageMarker+1;\n")

From c23e5a47bc1464c4ae8bd92cd862ae6aa815266a Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Wed, 31 Oct 2018 10:38:25 +0100
Subject: [PATCH 011/295] [kandinsky] Add unit tests for UTF-8 decoding and
 CodepointToIndex

---
 kandinsky/Makefile             |  3 +++
 kandinsky/test/font.cpp        | 24 ++++++++++++++++++++++++
 kandinsky/test/utf8decoder.cpp | 15 +++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 kandinsky/test/font.cpp
 create mode 100644 kandinsky/test/utf8decoder.cpp

diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index 9705de6fe..af4804052 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -13,6 +13,7 @@ src += $(addprefix kandinsky/src/,\
   ion_context.cpp \
   point.cpp \
   rect.cpp \
+  unicode/utf8decoder.cpp\
 )
 
 src += $(addprefix kandinsky/fonts/, \
@@ -22,7 +23,9 @@ src += $(addprefix kandinsky/fonts/, \
 
 tests += $(addprefix kandinsky/test/,\
   color.cpp\
+  font.cpp\
   rect.cpp\
+  utf8decoder.cpp\
 )
 
 RASTERIZER_CFLAGS := -std=c99 `pkg-config freetype2 --cflags`
diff --git a/kandinsky/test/font.cpp b/kandinsky/test/font.cpp
new file mode 100644
index 000000000..96a2acfed
--- /dev/null
+++ b/kandinsky/test/font.cpp
@@ -0,0 +1,24 @@
+#include <quiz.h>
+#include <kandinsky.h>
+#include <assert.h>
+
+static constexpr KDFont::CodepointIndexPair table[] = {
+  KDFont::CodepointIndexPair(3, 1), // Codepoint, identifier
+  KDFont::CodepointIndexPair(9, 4),
+  KDFont::CodepointIndexPair(12, 5),
+  KDFont::CodepointIndexPair(14, 7)
+};
+
+constexpr KDFont testFont(4, table, 10, 10, nullptr, nullptr);
+
+const KDFont::GlyphIndex index_for_codepoint[] = {
+/* 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 */
+   0,  0,  0,  1,  2,  3,  0,  0,  0,  4,  0,  0,  5,  6,  7,  0
+};
+
+QUIZ_CASE(kandinsky_font_index_for_codepoint) {
+  for (int i=0; i<16; i++) {
+    KDFont::GlyphIndex result = testFont.indexForCodepoint(i);
+    quiz_assert(result == index_for_codepoint[i]);
+  }
+}
diff --git a/kandinsky/test/utf8decoder.cpp b/kandinsky/test/utf8decoder.cpp
new file mode 100644
index 000000000..3e858f526
--- /dev/null
+++ b/kandinsky/test/utf8decoder.cpp
@@ -0,0 +1,15 @@
+#include <quiz.h>
+#include <kandinsky/unicode/utf8decoder.h>
+
+void assert_decodes_to(const char * string, Codepoint c) {
+  UTF8Decoder d(string);
+  quiz_assert(d.nextCodepoint() == c);
+  quiz_assert(d.nextCodepoint() == 0);
+}
+
+QUIZ_CASE(kandinsky_utf8_decoder) {
+  assert_decodes_to("\x20", 0x20);
+  assert_decodes_to("\xC2\xA2", 0xA2);
+  assert_decodes_to("\xED\x9F\xBF", 0xD7FF);
+  assert_decodes_to("\xCC\x81", 0x301);
+}

From e57995712be058b7e9e165a64116f850a67373d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 10 Jan 2019 14:07:36 +0100
Subject: [PATCH 012/295] [kandinsky/font] Fix rebase on master

---
 apps/i18n.py           | 23 +++++++++--------------
 kandinsky/src/font.cpp |  2 +-
 2 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/apps/i18n.py b/apps/i18n.py
index dd307b8ba..8aee99be6 100644
--- a/apps/i18n.py
+++ b/apps/i18n.py
@@ -85,14 +85,20 @@ def print_implementation(data, path, locales):
     f = open(path, "w")
     f.write("#include \"i18n.h\"\n")
     f.write("#include <apps/global_preferences.h>\n")
-    f.write("#include <assert.h>\n\n");
+    f.write("#include <assert.h>\n\n")
     f.write("namespace I18n {\n\n")
 
+
     # Write the default message
     f.write("constexpr static char universalDefault[] = {0};\n")
+
     # Write the universal messages
     for message in data["universal_messages"]:
-        f.write("constexpr static char universal" + message + "[] = " + data["data"]["universal"][message] + ";\n")
+        f.write("constexpr static char universal" + message + "[] = ")
+        f = open(path, "ab") # Re-open the file as binary to output raw UTF-8 bytes
+        f.write(data["data"]["universal"][message])
+        f = open(path, "a") # Re-open the file as text
+        f.write(";\n")
     f.write("\n")
     f.write("constexpr static const char * universalMessages[%d] = {\n" % (len(data["universal_messages"])+1))
     f.write("  universalDefault,\n")
@@ -123,19 +129,8 @@ def print_implementation(data, path, locales):
         f.write("},\n")
     f.write("};\n\n")
 
+
     # Write the translate method
-    for message in data["universal_messages"]:
-        f.write("constexpr static char universal" + message + "[] = ")
-        f = open(path, "ab") # Re-open the file as binary to output raw UTF-8 bytes
-        f.write(data["data"]["universal"][message])
-        f = open(path, "a") # Re-open the file as text
-        f.write(";\n")
-    f.write("\n")
-    f.write("constexpr static const char * universalMessages[%d] = {\n" % len(data["universal_messages"]))
-    for message in data["universal_messages"]:
-        f.write("  universal" + message + ",\n")
-    f.write("};\n")
-    f.write("\n")
     f.write("const char * translate(Message m, Language l) {\n")
     f.write("  assert(m != Message::LocalizedMessageMarker);\n")
     f.write("  int localizedMessageOffset = (int)Message::LocalizedMessageMarker+1;\n")
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 2e5a88321..b6c43151d 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -64,7 +64,7 @@ void KDFont::colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffe
   KDColor * colorBuffer = glyphBuffer->colorBuffer();
 
   uint8_t mask = (0xFF >> (8-k_bitsPerPixel));
-  int pixelIndex = pixelCount; // Let's start at the final pixel
+  int pixelIndex = m_glyphSize.width() * m_glyphSize.height() - 1; // Let's start at the final pixel
   int greyscaleByteIndex = pixelIndex * k_bitsPerPixel / 8;
   while (pixelIndex >= 0) {
     assert(greyscaleByteIndex == pixelIndex * k_bitsPerPixel / 8);

From 1f80e63bea202d501a339fe6fa999667542e8b30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 10 Jan 2019 14:36:06 +0100
Subject: [PATCH 013/295] [kandinsky] Coding style

---
 kandinsky/include/kandinsky/font.h | 1 -
 kandinsky/src/font.cpp             | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 5d2a571e9..a45a1e283 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -25,7 +25,6 @@ public:
     KDColor * colorBuffer() { return m_colors; }
     uint8_t * greyscaleBuffer() { return m_greyscales; }
     uint8_t * secondaryGreyscaleBuffer() { return m_greyscales + k_maxGlyphPixelCount; }
-  private:
   private:
     static constexpr int k_maxGlyphPixelCount = 180; //TODO: Should be generated by the rasterizer
     uint8_t m_greyscales[2*k_maxGlyphPixelCount];
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index b6c43151d..40fbebd00 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -87,7 +87,7 @@ KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
     int currentIndex = (lowerBound+upperBound)/2;
     // printf("Considering %d in [%d,%d]\n", currentIndex, lowerBound, upperBound);
     const CodepointIndexPair * currentPair = m_table + currentIndex;
-    const CodepointIndexPair * nextPair = currentIndex + 1 < m_tableLength ? currentPair + 1 : nullptr;
+    const CodepointIndexPair * nextPair = (currentIndex + 1) < m_tableLength ? currentPair + 1 : nullptr;
     // printf("At this point, currentPair->codepoint() = %d and c = %d\n", currentPair->codepoint(), c);
     if (currentPair->codepoint() == c) {
       return currentPair->glyphIndex();

From 6380ba6cea5ac0a6457c4524d2bb7ed52f5177ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 10 Jan 2019 14:40:45 +0100
Subject: [PATCH 014/295] [poincare/tokenizer] Coding style

---
 poincare/src/parsing/tokenizer.cpp | 19 ++++++++++---------
 poincare/src/parsing/tokenizer.h   | 13 ++++++-------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 1ad7dfd99..00698188a 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -16,7 +16,7 @@ const char Tokenizer::popChar() {
   const char nextChar = *m_nextCharP;
   m_nextCharP++;
   return nextChar;
-  // Note that, after returning, m_nextCharP points to the character after nextChar.
+  // After returning, m_nextCharP points to the character after nextChar.
 }
 
 bool Tokenizer::canPopChar (const char c) {
@@ -28,8 +28,8 @@ bool Tokenizer::canPopChar (const char c) {
 }
 
 size_t Tokenizer::popIdentifier() {
-  // Since this method is only called by popToken,
-  // currentChar is necessary a letter.
+  /* Since this method is only called by popToken, currentChar is necessarily a
+   * letter. */
   size_t length = 1;
   char nextChar = *m_nextCharP;
   while (isLetter(nextChar) || isDigit(nextChar) || nextChar == '_') {
@@ -50,7 +50,7 @@ size_t Tokenizer::popDigits() {
 
 Token Tokenizer::popNumber() {
   /* This method is only called by popToken, after popping a dot or a digit.
-   * Hence one needs to get one character back. */
+   * Hence the need to get one character back. */
   m_nextCharP--;
 
   const char * integralPartText = m_nextCharP;
@@ -88,7 +88,8 @@ Token Tokenizer::popToken() {
   // Skip whitespaces
   while (canPopChar(' ')) {}
 
-  // Save for later use (since m_nextCharP is altered by popChar, popNumber, popIdentifier).
+  /* Save for later use (since m_nextCharP is altered by popChar, popNumber,
+   * popIdentifier). */
   const char * start = m_nextCharP;
 
   const char currentChar = popChar();
@@ -102,8 +103,8 @@ Token Tokenizer::popToken() {
     return result;
   }
   if ('(' <= currentChar && currentChar <= '/') {
-    // Those characters form a contiguous range in the ascii character set,
-    // so one can make searching faster with this lookup table.
+    /* Those characters form a contiguous range in the ascii character set, we
+     * make searching faster with this lookup table. */
     constexpr Token::Type typeForChar[] = {
       Token::LeftParenthesis,
       Token::RightParenthesis,
@@ -114,8 +115,8 @@ Token Tokenizer::popToken() {
       Token::Undefined,
       Token::Slash
     };
-    // The dot character is the second last of that range,
-    // but it is matched before (with popNumber).
+    /* The dot character is the second last of that range, but it is matched
+     * before (with popNumber). */
     assert(currentChar != '.');
     return Token(typeForChar[currentChar - '(']);
   }
diff --git a/poincare/src/parsing/tokenizer.h b/poincare/src/parsing/tokenizer.h
index 7e3cd452e..05e2017d9 100644
--- a/poincare/src/parsing/tokenizer.h
+++ b/poincare/src/parsing/tokenizer.h
@@ -1,12 +1,11 @@
 #ifndef POINCARE_PARSING_TOKENIZER_H
 #define POINCARE_PARSING_TOKENIZER_H
 
-/* In order to parse a text input into an Expression,
- * (an instance of) the Tokenizer reads the successive
- * characters of the input, pops the Tokens it recognizes,
- * which are then consumed by the Parser.
- * For each Token, the Tokenizer determines a Type and
- * may save other relevant data intended for the Parser. */
+/* In order to parse a text input into an Expression, (an instance of) the
+ * Tokenizer reads the successive characters of the input, pops the Tokens it
+ * recognizes, which are then consumed by the Parser. For each Token, the
+ * Tokenizer determines a Type and may save other relevant data intended for the
+ * Parser. */
 
 #include "token.h"
 
@@ -14,7 +13,7 @@ namespace Poincare {
 
 class Tokenizer {
 public:
-  Tokenizer(const char * text) : m_nextCharP(text) {};
+  Tokenizer(const char * text) : m_nextCharP(text) {}
   Token popToken();
 private:
   const char popChar();

From 46f2cc29dcaeb8b90080a71e6b67b6a69b3f2d32 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 10 Jan 2019 15:38:36 +0100
Subject: [PATCH 015/295] [poincare/parser] Use the UTF8Decoder in the parser

---
 poincare/src/parsing/tokenizer.cpp | 95 ++++++++++++++++++------------
 poincare/src/parsing/tokenizer.h   |  7 ++-
 2 files changed, 63 insertions(+), 39 deletions(-)

diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 00698188a..bd2c8e823 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -1,6 +1,7 @@
 #include "tokenizer.h"
 #include <ion/charset.h>
 #include <poincare/number.h>
+#include <kandinsky/unicode/utf8decoder.h>
 
 namespace Poincare {
 
@@ -12,54 +13,70 @@ static inline bool isDigit(const char c) {
   return '0' <= c && c <= '9';
 }
 
+const char Tokenizer::nextChar(PopTest popTest, char context, bool * testResult) {
+  // Beware of chars spaning over more than one byte: use the UTF8Decoder.
+  UTF8Decoder decoder(m_text);
+  Codepoint firstCodepoint = decoder.nextCodepoint();
+  int numberOfBytesForChar = 1;
+  if (firstCodepoint != Null) {
+    Codepoint codepoint = decoder.nextCodepoint();
+    while (codepoint.isCombining()) {
+      numberOfBytesForChar++;
+      codepoint = decoder.nextCodepoint();
+    }
+  }
+  char c = *m_text; // TODO handle combined chars?
+  bool shouldPop = popTest(c, context);
+  if (testResult != nullptr) {
+    *testResult = shouldPop;
+  }
+  if (shouldPop) {
+    m_text+= numberOfBytesForChar;
+  }
+  return c;
+}
+
 const char Tokenizer::popChar() {
-  const char nextChar = *m_nextCharP;
-  m_nextCharP++;
-  return nextChar;
-  // After returning, m_nextCharP points to the character after nextChar.
+  return nextChar([](char c, char context) { return true; });
+  // m_text now points to the start of the character after the returned char.
 }
 
 bool Tokenizer::canPopChar (const char c) {
-  if (*m_nextCharP == c) {
-    m_nextCharP++;
-    return true;
+  bool didPop = false;
+  nextChar([](char nextC, char context) { return nextC == context; }, c, &didPop);
+  return didPop;
+}
+
+size_t Tokenizer::popWhile(PopTest popTest, char context) {
+  size_t length = 0;
+  bool didPop = true;
+  while (didPop) {
+    nextChar(popTest, context, &didPop);
+    if (didPop) {
+      length++;
+    }
   }
-  return false;
+  return length;
 }
 
 size_t Tokenizer::popIdentifier() {
-  /* Since this method is only called by popToken, currentChar is necessarily a
-   * letter. */
-  size_t length = 1;
-  char nextChar = *m_nextCharP;
-  while (isLetter(nextChar) || isDigit(nextChar) || nextChar == '_') {
-    length++;
-    nextChar = *++m_nextCharP;
-  }
-  return length;
+  return popWhile([](char c, char context) { return isLetter(c) || isDigit(c) || c == context; }, '_');
 }
 
 size_t Tokenizer::popDigits() {
-  size_t length = 0;
-  while (isDigit(*m_nextCharP)) {
-    length++;
-    m_nextCharP++;
-  }
-  return length;
+  return popWhile([](char c, char context) { return isDigit(c); });
 }
 
 Token Tokenizer::popNumber() {
-  /* This method is only called by popToken, after popping a dot or a digit.
-   * Hence the need to get one character back. */
-  m_nextCharP--;
-
-  const char * integralPartText = m_nextCharP;
+  const char * integralPartText = m_text;
   size_t integralPartLength = popDigits();
 
-  const char * fractionalPartText = m_nextCharP;
+  const char * fractionalPartText = m_text;
   size_t fractionalPartLength = 0;
+
+  assert(integralPartLength > 0 || *m_text == '.');
   if (canPopChar('.')) {
-    fractionalPartText = m_nextCharP;
+    fractionalPartText = m_text;
     fractionalPartLength = popDigits();
   }
 
@@ -67,12 +84,12 @@ Token Tokenizer::popNumber() {
     return Token(Token::Undefined);
   }
 
-  const char * exponentPartText = m_nextCharP;
+  const char * exponentPartText = m_text;
   size_t exponentPartLength = 0;
   bool exponentIsNegative = false;
   if (canPopChar(Ion::Charset::Exponent)) {
     exponentIsNegative = canPopChar('-');
-    exponentPartText = m_nextCharP;
+    exponentPartText = m_text;
     exponentPartLength = popDigits();
     if (exponentPartLength == 0) {
       return Token(Token::Undefined);
@@ -88,18 +105,22 @@ Token Tokenizer::popToken() {
   // Skip whitespaces
   while (canPopChar(' ')) {}
 
-  /* Save for later use (since m_nextCharP is altered by popChar, popNumber,
+  /* Save for later use (since m_text is altered by popChar, popNumber,
    * popIdentifier). */
-  const char * start = m_nextCharP;
+  const char * start = m_text;
+
+  /* If the next char is the start of a number, we do not want to pop it because
+   * popNumber needs this char. */
+  bool nextCharIsNeitherDotNorDigit = true;
+  const char currentChar = nextChar([](char c, char context) { return c != context && !isDigit(c); }, '.', &nextCharIsNeitherDotNorDigit);
 
-  const char currentChar = popChar();
   // According to currentChar, recognize the Token::Type.
-  if (currentChar == '.' || isDigit(currentChar)) {
+  if (!nextCharIsNeitherDotNorDigit) {
     return popNumber();
   }
   if (isLetter(currentChar)) {
     Token result(Token::Identifier);
-    result.setString(start, popIdentifier());
+    result.setString(start, 1 + popIdentifier()); // We already popped 1 char
     return result;
   }
   if ('(' <= currentChar && currentChar <= '/') {
diff --git a/poincare/src/parsing/tokenizer.h b/poincare/src/parsing/tokenizer.h
index 05e2017d9..b75d6e863 100644
--- a/poincare/src/parsing/tokenizer.h
+++ b/poincare/src/parsing/tokenizer.h
@@ -13,16 +13,19 @@ namespace Poincare {
 
 class Tokenizer {
 public:
-  Tokenizer(const char * text) : m_nextCharP(text) {}
+  Tokenizer(const char * text) : m_text(text) {}
   Token popToken();
 private:
+  typedef bool (*PopTest)(char c, char context);
+  const char nextChar(PopTest popTest, char context = 0, bool * testResult = nullptr);
   const char popChar();
   bool canPopChar(const char c);
+  size_t popWhile(PopTest popTest, char context = 0);
   size_t popDigits();
   size_t popIdentifier();
   Token popNumber();
 
-  const char * m_nextCharP;
+  const char * m_text;
 };
 
 }

From c8da3bb9e7b8c56365ba6f9260e87c8d73858f69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 11:09:07 +0100
Subject: [PATCH 016/295] [kandinsky/font] Add comment about UTF-8

---
 kandinsky/include/kandinsky/font.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index a45a1e283..7f716ba70 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -8,6 +8,21 @@
 #include <kandinsky/unicode/codepoint.h>
 #include "palette.h"
 
+/* We use UTF-8 encoding. This means that a character is encoded as a code point
+ * that uses between 1 and 4 bytes. Code points can be "combining", in which
+ * case their glyph should be superimposed to the glyph of the previous code
+ * point in the string. This is for instance used to print accents: the string
+ * for the glyph 'è' is composed of the code point for 'e' followed by the
+ * combining code point for '`'.
+ * ASCII characters have the same encoding in ASCII and in UTF-8.
+ *
+ * We do not provide a glyph for each of the 1,112,064 valid UTF-8 code points.
+ * We thus have a table of the glyphs we can draw (uint32_t Codepoints[] in
+ * kandinsky/fonts/codepoints.h). To easily compute the index of a code point in
+ * the Codepoints table, we use the m_table matching table: it contains the
+ * CodepointIndexPairs of the first code point of each series of consecutive
+ * code points in the Codepoints table. */
+
 class KDFont {
 private:
   static constexpr int k_bitsPerPixel = 4; // TODO: Should be generated by the rasterizer

From 50ac72107b80742136a45e16239b6e2a8f8de2bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 11:16:14 +0100
Subject: [PATCH 017/295] Rename Codepoint Code point

---
 .../fonts/{codepoints.h => code_points.h}     |  4 +-
 kandinsky/fonts/rasterizer.c                  | 48 +++++++-------
 kandinsky/include/kandinsky/font.h            | 30 ++++-----
 .../include/kandinsky/unicode/code_point.h    | 23 +++++++
 .../include/kandinsky/unicode/codepoint.h     | 23 -------
 .../include/kandinsky/unicode/utf8decoder.h   |  4 +-
 kandinsky/src/context_text.cpp                | 24 +++----
 kandinsky/src/font.cpp                        | 66 +++++++++----------
 kandinsky/src/unicode/utf8decoder.cpp         |  4 +-
 kandinsky/test/font.cpp                       | 18 ++---
 kandinsky/test/utf8decoder.cpp                |  6 +-
 poincare/src/parsing/tokenizer.cpp            | 10 +--
 12 files changed, 130 insertions(+), 130 deletions(-)
 rename kandinsky/fonts/{codepoints.h => code_points.h} (98%)
 create mode 100644 kandinsky/include/kandinsky/unicode/code_point.h
 delete mode 100644 kandinsky/include/kandinsky/unicode/codepoint.h

diff --git a/kandinsky/fonts/codepoints.h b/kandinsky/fonts/code_points.h
similarity index 98%
rename from kandinsky/fonts/codepoints.h
rename to kandinsky/fonts/code_points.h
index f039df1d8..44195cf96 100644
--- a/kandinsky/fonts/codepoints.h
+++ b/kandinsky/fonts/code_points.h
@@ -1,7 +1,7 @@
 // [0x30a].map{|i| "0x" + i.to_s(16) +", // " + [i].pack("U") + " // " + Unicode::Name.of([i].pack("U"))}.join("|")
 #include <stdint.h>
 
-uint32_t Codepoints[] = {
+uint32_t CodePoints[] = {
   0x20, //   // SPACE
   0x21, // ! // EXCLAMATION MARK
   0x22, // " // QUOTATION MARK
@@ -146,4 +146,4 @@ uint32_t Codepoints[] = {
 
 };
 
-int NumberOfCodepoints = sizeof(Codepoints)/sizeof(Codepoints[0]);
+int NumberOfCodePoints = sizeof(CodePoints)/sizeof(CodePoints[0]);
diff --git a/kandinsky/fonts/rasterizer.c b/kandinsky/fonts/rasterizer.c
index 5903adfdf..1990ba56c 100644
--- a/kandinsky/fonts/rasterizer.c
+++ b/kandinsky/fonts/rasterizer.c
@@ -16,7 +16,7 @@
 #include FT_FREETYPE_H
 
 #include "unicode_for_symbol.h"
-#include "codepoints.h"
+#include "code_points.h"
 #include "../../ion/src/external/lz4/lz4hc.h"
 
 
@@ -94,9 +94,9 @@ int main(int argc, char * argv[]) {
   int maxWidth = 0;
   int maxAboveBaseline = 0;
   int maxBelowBaseline = 0;
-  for (int i=0; i < NumberOfCodepoints; i++) {
-    wchar_t codepoint = Codepoints[i];
-    ENSURE(!FT_Load_Char(face, codepoint, FT_LOAD_RENDER), "Loading character 0x%02x", codepoint);
+  for (int i=0; i < NumberOfCodePoints; i++) {
+    wchar_t codePoint = CodePoints[i];
+    ENSURE(!FT_Load_Char(face, codePoint, FT_LOAD_RENDER), "Loading character 0x%02x", codePoint);
     int aboveBaseline = face->glyph->bitmap_top;
     int belowBaseline = face->glyph->bitmap.rows - face->glyph->bitmap_top;
     int width = face->glyph->bitmap_left + face->glyph->bitmap.width;
@@ -117,7 +117,7 @@ int main(int argc, char * argv[]) {
 
   int grid_size = 1;
   int grid_width = 20;
-  int grid_height = ((NumberOfCodepoints-1)/grid_width)+1;
+  int grid_height = ((NumberOfCodePoints-1)/grid_width)+1;
 
   bitmap_image.width = grid_width*glyph_width+(grid_width-1)*grid_size;
   bitmap_image.height = grid_height*glyph_height+(grid_height-1)*grid_size;
@@ -135,12 +135,12 @@ int main(int argc, char * argv[]) {
     }
   }
 
-  for (int i=0; i<NumberOfCodepoints; i++) {
-    wchar_t codepoint = Codepoints[i];
+  for (int i=0; i<NumberOfCodePoints; i++) {
+    wchar_t codePoint = CodePoints[i];
     int x = i%grid_width;
     int y = i/grid_width;
     // FT_LOAD_RENDER: Render the glyph upon load
-    ENSURE(!FT_Load_Char(face, codepoint, FT_LOAD_RENDER), "Loading character 0x%08x", codepoint);
+    ENSURE(!FT_Load_Char(face, codePoint, FT_LOAD_RENDER), "Loading character 0x%08x", codePoint);
     //printf("Advances = %dx%d\n", face->glyph->bitmap_left, face->glyph->bitmap_top);
     while (face->glyph->bitmap_left < 0) {
       // This is a workaround for combining glyphs.
@@ -165,18 +165,18 @@ int main(int argc, char * argv[]) {
   fprintf(sourceFile, "/* This file is auto-generated by the rasterizer */\n\n");
   fprintf(sourceFile, "#include <kandinsky/font.h>\n\n");
 
-  // Step 1 - Build the GlyphIndex <-> UnicodeCodepoint correspondance table
+  // Step 1 - Build the GlyphIndex <-> UnicodeCodePoint correspondance table
 
   int previousIndex = -1;
-  uint32_t previousCodepoint = 0;
+  uint32_t previousCodePoint = 0;
   int numberOfPairs = 0;
 
-  fprintf(sourceFile, "static constexpr KDFont::CodepointIndexPair table[] = {\n");
-  for (int i=0; i<NumberOfCodepoints; i++) {
-    int currentCodepoint = Codepoints[i];
-    if (currentCodepoint != (previousCodepoint + (i-previousIndex))) {
-      fprintf(sourceFile, "  KDFont::CodepointIndexPair(0x%x, %d),\n", currentCodepoint, i);
-      previousCodepoint = currentCodepoint;
+  fprintf(sourceFile, "static constexpr KDFont::CodePointIndexPair table[] = {\n");
+  for (int i=0; i<NumberOfCodePoints; i++) {
+    int currentCodePoint = CodePoints[i];
+    if (currentCodePoint != (previousCodePoint + (i-previousIndex))) {
+      fprintf(sourceFile, "  KDFont::CodePointIndexPair(0x%x, %d),\n", currentCodePoint, i);
+      previousCodePoint = currentCodePoint;
       previousIndex = i;
       numberOfPairs++;
     }
@@ -195,12 +195,12 @@ int main(int argc, char * argv[]) {
   int sizeOfUncompressedGlyphBuffer = glyph_width * glyph_height * greyscaleBitsPerPixel/8;
   uint8_t * uncompressedGlyphBuffer = (uint8_t *)malloc(sizeOfUncompressedGlyphBuffer);
 
-  uint16_t glyphDataOffset[NumberOfCodepoints+1];
-  int maxGlyphDataSize = NumberOfCodepoints* sizeOfUncompressedGlyphBuffer;
+  uint16_t glyphDataOffset[NumberOfCodePoints+1];
+  int maxGlyphDataSize = NumberOfCodePoints* sizeOfUncompressedGlyphBuffer;
   uint8_t * glyphData = (uint8_t *)malloc(maxGlyphDataSize);
   uint16_t lastOffset = 0;
 
-  for (int character = 0; character < NumberOfCodepoints; character++) {
+  for (int character = 0; character < NumberOfCodePoints; character++) {
     int characterX = (character%grid_width * (glyph_width+grid_size));
     int characterY = (character/grid_width * (glyph_height+grid_size));
     uint8_t accumulator = 0;
@@ -236,16 +236,16 @@ int main(int argc, char * argv[]) {
     glyphDataOffset[character] = lastOffset;
     lastOffset += sizeOfCompressedGlyphBuffer;
   }
-  glyphDataOffset[NumberOfCodepoints] = lastOffset;
+  glyphDataOffset[NumberOfCodePoints] = lastOffset;
 
-  fprintf(sourceFile, "static constexpr uint16_t glyphDataOffset[%d] = {", NumberOfCodepoints+1);
-  prettyPrintArray(sourceFile, 80, 2, glyphDataOffset, NumberOfCodepoints+1);
+  fprintf(sourceFile, "static constexpr uint16_t glyphDataOffset[%d] = {", NumberOfCodePoints+1);
+  prettyPrintArray(sourceFile, 80, 2, glyphDataOffset, NumberOfCodePoints+1);
   fprintf(sourceFile, "};\n\n");
 
   size_t finalDataSize = lastOffset;
-  size_t initialDataSize = NumberOfCodepoints * glyph_width * glyph_height;
+  size_t initialDataSize = NumberOfCodePoints * glyph_width * glyph_height;
 
-  fprintf(sourceFile, "/* Rasterized  = %5zu bytes (%d glyphs x %d pixels)\n", initialDataSize, NumberOfCodepoints, glyph_width*glyph_height);
+  fprintf(sourceFile, "/* Rasterized  = %5zu bytes (%d glyphs x %d pixels)\n", initialDataSize, NumberOfCodePoints, glyph_width*glyph_height);
   fprintf(sourceFile, " * Downsampled = %5lu bytes (1/%d of rasterized)\n", initialDataSize*greyscaleBitsPerPixel/8, 8/greyscaleBitsPerPixel);
   fprintf(sourceFile, " * Compressed  = %5zu bytes (%.2f%% of rasterized) */\n", finalDataSize, 100.0*finalDataSize/initialDataSize);
 
diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 7f716ba70..4af33758c 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -5,7 +5,7 @@
 #include <stddef.h>
 #include <kandinsky/size.h>
 #include <kandinsky/coordinate.h>
-#include <kandinsky/unicode/codepoint.h>
+#include <kandinsky/unicode/code_point.h>
 #include "palette.h"
 
 /* We use UTF-8 encoding. This means that a character is encoded as a code point
@@ -17,11 +17,11 @@
  * ASCII characters have the same encoding in ASCII and in UTF-8.
  *
  * We do not provide a glyph for each of the 1,112,064 valid UTF-8 code points.
- * We thus have a table of the glyphs we can draw (uint32_t Codepoints[] in
- * kandinsky/fonts/codepoints.h). To easily compute the index of a code point in
- * the Codepoints table, we use the m_table matching table: it contains the
- * CodepointIndexPairs of the first code point of each series of consecutive
- * code points in the Codepoints table. */
+ * We thus have a table of the glyphs we can draw (uint32_t CodePoints[] in
+ * kandinsky/fonts/code_points.h). To easily compute the index of a code point in
+ * the CodePoints table, we use the m_table matching table: it contains the
+ * CodePointIndexPairs of the first code point of each series of consecutive
+ * code points in the CodePoints table. */
 
 class KDFont {
 private:
@@ -47,19 +47,19 @@ public:
   };
 
   using GlyphIndex = uint8_t;
-  class CodepointIndexPair {
+  class CodePointIndexPair {
   public:
-    constexpr CodepointIndexPair(Codepoint c, GlyphIndex i) : m_codepoint(c), m_glyphIndex(i) {}
-    Codepoint codepoint() const { return m_codepoint; }
+    constexpr CodePointIndexPair(CodePoint c, GlyphIndex i) : m_codePoint(c), m_glyphIndex(i) {}
+    CodePoint codePoint() const { return m_codePoint; }
     GlyphIndex glyphIndex() const { return m_glyphIndex; }
   private:
-    Codepoint m_codepoint;
+    CodePoint m_codePoint;
     GlyphIndex m_glyphIndex;
   };
-  GlyphIndex indexForCodepoint(Codepoint c) const;
+  GlyphIndex indexForCodePoint(CodePoint c) const;
 
-  void setGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const;
-  void accumulateGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const;
+  void setGlyphGreyscalesForCodePoint(CodePoint codePoint, GlyphBuffer * glyphBuffer) const;
+  void accumulateGlyphGreyscalesForCodePoint(CodePoint codePoint, GlyphBuffer * glyphBuffer) const;
 
   using RenderPalette = KDPalette<(1<<k_bitsPerPixel)>;
   void colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffer * glyphBuffer) const;
@@ -69,7 +69,7 @@ public:
   }
   KDSize glyphSize() const { return m_glyphSize; }
 
-  constexpr KDFont(size_t tableLength, const CodepointIndexPair * table, KDCoordinate glyphWidth, KDCoordinate glyphHeight, const uint16_t * glyphDataOffset, const uint8_t * data) :
+  constexpr KDFont(size_t tableLength, const CodePointIndexPair * table, KDCoordinate glyphWidth, KDCoordinate glyphHeight, const uint16_t * glyphDataOffset, const uint8_t * data) :
     m_tableLength(tableLength), m_table(table), m_glyphSize(glyphWidth, glyphHeight), m_glyphDataOffset(glyphDataOffset), m_data(data) { }
 private:
   void fetchGreyscaleGlyphAtIndex(GlyphIndex index, uint8_t * greyscaleBuffer) const;
@@ -83,7 +83,7 @@ private:
   }
 
   size_t m_tableLength;
-  const CodepointIndexPair * m_table;
+  const CodePointIndexPair * m_table;
   KDSize m_glyphSize;
   const uint16_t * m_glyphDataOffset;
   const uint8_t * m_data;
diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
new file mode 100644
index 000000000..0487efb97
--- /dev/null
+++ b/kandinsky/include/kandinsky/unicode/code_point.h
@@ -0,0 +1,23 @@
+#ifndef KANDINSKY_UNICODE_CODE_POINT_H
+#define KANDINSKY_UNICODE_CODE_POINT_H
+
+#include <stdint.h>
+
+class CodePoint {
+public:
+  constexpr CodePoint(uint32_t c) : m_code(c) {}
+  operator uint16_t() const { return m_code; }
+
+
+  bool isCombining() const {
+    return (m_code >= 0x300 && m_code <= 0x036F);
+  }
+private:
+  uint32_t m_code;
+};
+
+static constexpr CodePoint Null = 0x0;
+static constexpr CodePoint Tabulation = 0x9;
+static constexpr CodePoint LineFeed = 0xA;
+
+#endif
diff --git a/kandinsky/include/kandinsky/unicode/codepoint.h b/kandinsky/include/kandinsky/unicode/codepoint.h
deleted file mode 100644
index 323647cfe..000000000
--- a/kandinsky/include/kandinsky/unicode/codepoint.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef KANDINSKY_UNICODE_CODEPOINT_H
-#define KANDINSKY_UNICODE_CODEPOINT_H
-
-#include <stdint.h>
-
-class Codepoint {
-public:
-  constexpr Codepoint(uint32_t c) : m_code(c) {}
-  operator uint16_t() const { return m_code; }
-
-
-  bool isCombining() const {
-    return (m_code >= 0x300 && m_code <= 0x036F);
-  }
-private:
-  uint32_t m_code;
-};
-
-static constexpr Codepoint Null = 0x0;
-static constexpr Codepoint Tabulation = 0x9;
-static constexpr Codepoint LineFeed = 0xA;
-
-#endif
diff --git a/kandinsky/include/kandinsky/unicode/utf8decoder.h b/kandinsky/include/kandinsky/unicode/utf8decoder.h
index f9badc77f..36aed2c48 100644
--- a/kandinsky/include/kandinsky/unicode/utf8decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8decoder.h
@@ -1,12 +1,12 @@
 #ifndef KANDINSKY_UNICODE_UTF8DECODER_H
 #define KANDINSKY_UNICODE_UTF8DECODER_H
 
-#include "codepoint.h"
+#include "code_point.h"
 
 class UTF8Decoder {
 public:
   UTF8Decoder(const char * string) : m_string(string) {}
-  Codepoint nextCodepoint();
+  CodePoint nextCodePoint();
 private:
   const char * m_string;
 };
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index 6a4282f90..d4654a6d0 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -13,21 +13,21 @@ KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font,
   KDFont::GlyphBuffer glyphBuffer;
 
   UTF8Decoder decoder(text);
-  Codepoint codepoint = decoder.nextCodepoint();
-  while (codepoint != Null) {
-    if (codepoint == LineFeed) {
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != Null) {
+    if (codePoint == LineFeed) {
       position = KDPoint(0, position.y() + glyphSize.height());
-      codepoint = decoder.nextCodepoint();
-    } else if (codepoint == Tabulation) {
+      codePoint = decoder.nextCodePoint();
+    } else if (codePoint == Tabulation) {
       position = position.translatedBy(KDPoint(k_tabCharacterWidth * glyphSize.width(), 0));
-      codepoint = decoder.nextCodepoint();
+      codePoint = decoder.nextCodePoint();
     } else {
-      assert(!codepoint.isCombining());
-      font->setGlyphGreyscalesForCodepoint(codepoint, &glyphBuffer);
-      codepoint = decoder.nextCodepoint();
-      while (codepoint.isCombining()) {
-        font->accumulateGlyphGreyscalesForCodepoint(codepoint, &glyphBuffer);
-        codepoint = decoder.nextCodepoint();
+      assert(!codePoint.isCombining());
+      font->setGlyphGreyscalesForCodePoint(codePoint, &glyphBuffer);
+      codePoint = decoder.nextCodePoint();
+      while (codePoint.isCombining()) {
+        font->accumulateGlyphGreyscalesForCodePoint(codePoint, &glyphBuffer);
+        codePoint = decoder.nextCodePoint();
       }
       font->colorizeGlyphBuffer(&palette, &glyphBuffer);
       // Flush accumulated content
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 40fbebd00..15173836b 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -12,31 +12,31 @@ KDSize KDFont::stringSize(const char * text) const {
   KDSize stringSize = KDSize(0, m_glyphSize.height());
 
   UTF8Decoder decoder(text);
-  Codepoint codepoint = decoder.nextCodepoint();
-  while (codepoint != Null) {
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != Null) {
     KDSize cSize = KDSize(m_glyphSize.width(), 0);
-    if (codepoint == LineFeed) {
+    if (codePoint == LineFeed) {
       cSize = KDSize(0, m_glyphSize.height());
-      codepoint = decoder.nextCodepoint();
-    } else if (codepoint == Tabulation) {
+      codePoint = decoder.nextCodePoint();
+    } else if (codePoint == Tabulation) {
       cSize = KDSize(k_tabCharacterWidth*m_glyphSize.width(), 0);
-    } else if (codepoint.isCombining()) {
+    } else if (codePoint.isCombining()) {
       cSize = KDSizeZero;
     }
     stringSize = KDSize(stringSize.width()+cSize.width(), stringSize.height()+cSize.height());
-    codepoint = decoder.nextCodepoint();
+    codePoint = decoder.nextCodePoint();
   }
   return stringSize;
 }
 
-void KDFont::setGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const {
-  fetchGreyscaleGlyphAtIndex(indexForCodepoint(codepoint), glyphBuffer->greyscaleBuffer());
+void KDFont::setGlyphGreyscalesForCodePoint(CodePoint codePoint, GlyphBuffer * glyphBuffer) const {
+  fetchGreyscaleGlyphAtIndex(indexForCodePoint(codePoint), glyphBuffer->greyscaleBuffer());
 }
 
-void KDFont::accumulateGlyphGreyscalesForCodepoint(Codepoint codepoint, GlyphBuffer * glyphBuffer) const {
+void KDFont::accumulateGlyphGreyscalesForCodePoint(CodePoint codePoint, GlyphBuffer * glyphBuffer) const {
   uint8_t * greyscaleBuffer = glyphBuffer->greyscaleBuffer();
   uint8_t * accumulationGreyscaleBuffer = glyphBuffer->secondaryGreyscaleBuffer();
-  fetchGreyscaleGlyphAtIndex(indexForCodepoint(codepoint), accumulationGreyscaleBuffer);
+  fetchGreyscaleGlyphAtIndex(indexForCodePoint(codePoint), accumulationGreyscaleBuffer);
   for (int i=0; i<m_glyphSize.width()*m_glyphSize.height(); i++) {
     greyscaleBuffer[i] |= accumulationGreyscaleBuffer[i];
   }
@@ -78,7 +78,7 @@ void KDFont::colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffe
   }
 }
 
-KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
+KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
 #define USE_BINARY_SEARCH 0
 #if USE_BINARY_SEARCH
   int lowerBound = 0;
@@ -86,12 +86,12 @@ KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
   while (true) {
     int currentIndex = (lowerBound+upperBound)/2;
     // printf("Considering %d in [%d,%d]\n", currentIndex, lowerBound, upperBound);
-    const CodepointIndexPair * currentPair = m_table + currentIndex;
-    const CodepointIndexPair * nextPair = (currentIndex + 1) < m_tableLength ? currentPair + 1 : nullptr;
-    // printf("At this point, currentPair->codepoint() = %d and c = %d\n", currentPair->codepoint(), c);
-    if (currentPair->codepoint() == c) {
+    const CodePointIndexPair * currentPair = m_table + currentIndex;
+    const CodePointIndexPair * nextPair = (currentIndex + 1) < m_tableLength ? currentPair + 1 : nullptr;
+    // printf("At this point, currentPair->codePoint() = %d and c = %d\n", currentPair->codePoint(), c);
+    if (currentPair->codePoint() == c) {
       return currentPair->glyphIndex();
-    } else if (currentPair->codepoint() > c) {
+    } else if (currentPair->codePoint() > c) {
       // We need to look below
       if (upperBound == currentIndex) {
         // There's nothing below. Error out.
@@ -101,9 +101,9 @@ KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
       continue;
     } else if (nextPair == nullptr) {
       return 0;
-    } else if (nextPair->codepoint() == c) {
+    } else if (nextPair->codePoint() == c) {
       return nextPair->glyphIndex();
-    } else if (nextPair->codepoint() < c) {
+    } else if (nextPair->codePoint() < c) {
       // We need to look above
       if (lowerBound == currentIndex) {
         // There's nothing above. Error out.
@@ -113,40 +113,40 @@ KDFont::GlyphIndex KDFont::indexForCodepoint(Codepoint c) const {
       continue;
     } else {
       // At this point,
-      // currentPair->codepoint < c && nextPair != nullptr && nextPair->codepoint > c
+      // currentPair->codePoint < c && nextPair != nullptr && nextPair->codePoint > c
       // Yay, it's over!
       // There can be an empty space between the currentPair and the nextPair
       // e.g. currentPair(3,1) and nextPair(9, 4)
-      // means value at codepoints 3, 4, 5, 6, 7, 8, 9
+      // means value at codePoints 3, 4, 5, 6, 7, 8, 9
       //     are glyph identifiers 1, ?, ?, ?, ?, ?, 4
       //                 solved as 1, 2, 3, 0, 0, 0, 4
 
       // Let's hunt down the zeroes
-      Codepoint lastCodepointOfCurrentPair = currentPair->codepoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
-      if (c > lastCodepointOfCurrentPair) {
+      CodePoint lastCodePointOfCurrentPair = currentPair->codePoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
+      if (c > lastCodePointOfCurrentPair) {
         return 0;
       }
-      return currentPair->glyphIndex() + (c - currentPair->codepoint());
+      return currentPair->glyphIndex() + (c - currentPair->codePoint());
     }
   }
 #else
-  const CodepointIndexPair * currentPair = m_table;
-  if (c < currentPair->codepoint()) {
+  const CodePointIndexPair * currentPair = m_table;
+  if (c < currentPair->codePoint()) {
     return 0;
   }
-  const CodepointIndexPair * endPair = m_table + m_tableLength - 1;
+  const CodePointIndexPair * endPair = m_table + m_tableLength - 1;
   while (currentPair < endPair) {
-    const CodepointIndexPair * nextPair = currentPair + 1;
-    if (c < nextPair->codepoint()) {
-      Codepoint lastCodepointOfCurrentPair = currentPair->codepoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
-      if (c > lastCodepointOfCurrentPair) {
+    const CodePointIndexPair * nextPair = currentPair + 1;
+    if (c < nextPair->codePoint()) {
+      CodePoint lastCodePointOfCurrentPair = currentPair->codePoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
+      if (c > lastCodePointOfCurrentPair) {
         return 0;
       }
-      return currentPair->glyphIndex() + (c - currentPair->codepoint());
+      return currentPair->glyphIndex() + (c - currentPair->codePoint());
     }
     currentPair = nextPair;
   }
-  if (endPair->codepoint() == c) {
+  if (endPair->codePoint() == c) {
     return endPair->glyphIndex();
   }
   return 0;
diff --git a/kandinsky/src/unicode/utf8decoder.cpp b/kandinsky/src/unicode/utf8decoder.cpp
index e8585e9f8..7990c28bb 100644
--- a/kandinsky/src/unicode/utf8decoder.cpp
+++ b/kandinsky/src/unicode/utf8decoder.cpp
@@ -15,12 +15,12 @@ static inline uint8_t last_k_bits(uint8_t value, uint8_t bits) {
   return (value & ((1<<bits)-1));
 }
 
-Codepoint UTF8Decoder::nextCodepoint() {
+CodePoint UTF8Decoder::nextCodePoint() {
   int leadingOnes = leading_ones(*m_string);
   uint32_t result = last_k_bits(*m_string++, 8-leadingOnes-1);
   for (int i=0; i<(leadingOnes-1); i++) {
     result <<= 6;
     result += (*m_string++ & 0x3F);
   }
-  return Codepoint(result);
+  return CodePoint(result);
 }
diff --git a/kandinsky/test/font.cpp b/kandinsky/test/font.cpp
index 96a2acfed..4c29c68d4 100644
--- a/kandinsky/test/font.cpp
+++ b/kandinsky/test/font.cpp
@@ -2,23 +2,23 @@
 #include <kandinsky.h>
 #include <assert.h>
 
-static constexpr KDFont::CodepointIndexPair table[] = {
-  KDFont::CodepointIndexPair(3, 1), // Codepoint, identifier
-  KDFont::CodepointIndexPair(9, 4),
-  KDFont::CodepointIndexPair(12, 5),
-  KDFont::CodepointIndexPair(14, 7)
+static constexpr KDFont::CodePointIndexPair table[] = {
+  KDFont::CodePointIndexPair(3, 1), // CodePoint, identifier
+  KDFont::CodePointIndexPair(9, 4),
+  KDFont::CodePointIndexPair(12, 5),
+  KDFont::CodePointIndexPair(14, 7)
 };
 
 constexpr KDFont testFont(4, table, 10, 10, nullptr, nullptr);
 
-const KDFont::GlyphIndex index_for_codepoint[] = {
+const KDFont::GlyphIndex index_for_code_point[] = {
 /* 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 */
    0,  0,  0,  1,  2,  3,  0,  0,  0,  4,  0,  0,  5,  6,  7,  0
 };
 
-QUIZ_CASE(kandinsky_font_index_for_codepoint) {
+QUIZ_CASE(kandinsky_font_index_for_code_point) {
   for (int i=0; i<16; i++) {
-    KDFont::GlyphIndex result = testFont.indexForCodepoint(i);
-    quiz_assert(result == index_for_codepoint[i]);
+    KDFont::GlyphIndex result = testFont.indexForCodePoint(i);
+    quiz_assert(result == index_for_code_point[i]);
   }
 }
diff --git a/kandinsky/test/utf8decoder.cpp b/kandinsky/test/utf8decoder.cpp
index 3e858f526..1198166a6 100644
--- a/kandinsky/test/utf8decoder.cpp
+++ b/kandinsky/test/utf8decoder.cpp
@@ -1,10 +1,10 @@
 #include <quiz.h>
 #include <kandinsky/unicode/utf8decoder.h>
 
-void assert_decodes_to(const char * string, Codepoint c) {
+void assert_decodes_to(const char * string, CodePoint c) {
   UTF8Decoder d(string);
-  quiz_assert(d.nextCodepoint() == c);
-  quiz_assert(d.nextCodepoint() == 0);
+  quiz_assert(d.nextCodePoint() == c);
+  quiz_assert(d.nextCodePoint() == 0);
 }
 
 QUIZ_CASE(kandinsky_utf8_decoder) {
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index bd2c8e823..84c3a2d7e 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -16,13 +16,13 @@ static inline bool isDigit(const char c) {
 const char Tokenizer::nextChar(PopTest popTest, char context, bool * testResult) {
   // Beware of chars spaning over more than one byte: use the UTF8Decoder.
   UTF8Decoder decoder(m_text);
-  Codepoint firstCodepoint = decoder.nextCodepoint();
+  CodePoint firstCodePoint = decoder.nextCodePoint();
   int numberOfBytesForChar = 1;
-  if (firstCodepoint != Null) {
-    Codepoint codepoint = decoder.nextCodepoint();
-    while (codepoint.isCombining()) {
+  if (firstCodePoint != Null) {
+    CodePoint codePoint = decoder.nextCodePoint();
+    while (codePoint.isCombining()) {
       numberOfBytesForChar++;
-      codepoint = decoder.nextCodepoint();
+      codePoint = decoder.nextCodePoint();
     }
   }
   char c = *m_text; // TODO handle combined chars?

From c31fe3856a89fa17bb77b47b3ff29172f9bb9946 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 11:40:32 +0100
Subject: [PATCH 018/295] [kandinsky] Add KDCodePoint prefix static code points

---
 kandinsky/include/kandinsky/unicode/code_point.h | 6 +++---
 kandinsky/src/context_text.cpp                   | 6 +++---
 kandinsky/src/font.cpp                           | 6 +++---
 poincare/src/parsing/tokenizer.cpp               | 2 +-
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
index 0487efb97..033e96407 100644
--- a/kandinsky/include/kandinsky/unicode/code_point.h
+++ b/kandinsky/include/kandinsky/unicode/code_point.h
@@ -16,8 +16,8 @@ private:
   uint32_t m_code;
 };
 
-static constexpr CodePoint Null = 0x0;
-static constexpr CodePoint Tabulation = 0x9;
-static constexpr CodePoint LineFeed = 0xA;
+static constexpr CodePoint KDCodePointNull = 0x0;
+static constexpr CodePoint KDCodePointTabulation = 0x9;
+static constexpr CodePoint KDCodePointLineFeed = 0xA;
 
 #endif
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index d4654a6d0..05728dbba 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -14,11 +14,11 @@ KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font,
 
   UTF8Decoder decoder(text);
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != Null) {
-    if (codePoint == LineFeed) {
+  while (codePoint != KDCodePointNull) {
+    if (codePoint == KDCodePointLineFeed) {
       position = KDPoint(0, position.y() + glyphSize.height());
       codePoint = decoder.nextCodePoint();
-    } else if (codePoint == Tabulation) {
+    } else if (codePoint == KDCodePointTabulation) {
       position = position.translatedBy(KDPoint(k_tabCharacterWidth * glyphSize.width(), 0));
       codePoint = decoder.nextCodePoint();
     } else {
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 15173836b..6f48d7814 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -13,12 +13,12 @@ KDSize KDFont::stringSize(const char * text) const {
 
   UTF8Decoder decoder(text);
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != Null) {
+  while (codePoint != KDCodePointNull) {
     KDSize cSize = KDSize(m_glyphSize.width(), 0);
-    if (codePoint == LineFeed) {
+    if (codePoint == KDCodePointLineFeed) {
       cSize = KDSize(0, m_glyphSize.height());
       codePoint = decoder.nextCodePoint();
-    } else if (codePoint == Tabulation) {
+    } else if (codePoint == KDCodePointTabulation) {
       cSize = KDSize(k_tabCharacterWidth*m_glyphSize.width(), 0);
     } else if (codePoint.isCombining()) {
       cSize = KDSizeZero;
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 84c3a2d7e..0dfa5e0fa 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -18,7 +18,7 @@ const char Tokenizer::nextChar(PopTest popTest, char context, bool * testResult)
   UTF8Decoder decoder(m_text);
   CodePoint firstCodePoint = decoder.nextCodePoint();
   int numberOfBytesForChar = 1;
-  if (firstCodePoint != Null) {
+  if (firstCodePoint != KDCodePointNull) {
     CodePoint codePoint = decoder.nextCodePoint();
     while (codePoint.isCombining()) {
       numberOfBytesForChar++;

From 1928e267a97c7e9cc38a09802d2dcb588a2e691c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 11:52:20 +0100
Subject: [PATCH 019/295] [kandinsky] UTF8Decoder::CodePointToChars

---
 .../include/kandinsky/unicode/utf8decoder.h   | 13 ++++++++++++
 kandinsky/src/unicode/utf8decoder.cpp         | 21 +++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/kandinsky/include/kandinsky/unicode/utf8decoder.h b/kandinsky/include/kandinsky/unicode/utf8decoder.h
index 36aed2c48..fcabe859a 100644
--- a/kandinsky/include/kandinsky/unicode/utf8decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8decoder.h
@@ -1,12 +1,25 @@
 #ifndef KANDINSKY_UNICODE_UTF8DECODER_H
 #define KANDINSKY_UNICODE_UTF8DECODER_H
 
+#include <stddef.h>
 #include "code_point.h"
 
+/* UTF-8 encodes all valid code points using at most 4 bytes (= 28 bits), the
+ * lowest codes being equal to ASCII codes. There are less than 2^21 different
+ * UTF-8 valid code points.
+ *
+ * The encoding is the following:
+ * For code points between ...   ->  The corresponding bits are ...
+ * 0 and 7F         -> 0xxxxxxx
+ * 80 and 7FF       -> 110xxxxx 10xxxxxx
+ * 800 and FFFF     -> 1110xxxx 10xxxxxx 10xxxxxx
+ * 10000 and 10FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
+
 class UTF8Decoder {
 public:
   UTF8Decoder(const char * string) : m_string(string) {}
   CodePoint nextCodePoint();
+  static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
 private:
   const char * m_string;
 };
diff --git a/kandinsky/src/unicode/utf8decoder.cpp b/kandinsky/src/unicode/utf8decoder.cpp
index 7990c28bb..5648df4df 100644
--- a/kandinsky/src/unicode/utf8decoder.cpp
+++ b/kandinsky/src/unicode/utf8decoder.cpp
@@ -24,3 +24,24 @@ CodePoint UTF8Decoder::nextCodePoint() {
   }
   return CodePoint(result);
 }
+
+size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize) {
+  assert(bufferSize >= sizeof(CodePoint)/sizeof(char));
+  size_t i = 0;
+  if (c <= 0x7F) {
+    buffer[i++] = c;
+  } else if (c <= 0x7FF) {
+    buffer[i++] = 0b11000000 | (c >> 6);
+    buffer[i++] = 0b10000000 | (c & 0b111111);
+  } else if (c <= 0xFFFF) {
+    buffer[i++] = 0b11100000 | (c >> 12);
+    buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
+    buffer[i++] = 0b10000000 | (c & 0b111111);
+  } else {
+    buffer[i++] = 0b11110000 | (c >> 18);
+    buffer[i++] = 0b10000000 | ((c >> 12) & 0b111111);
+    buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
+    buffer[i++] = 0b10000000 | (c & 0b111111);
+  }
+  return i;
+}

From 1a55c2023b0a8a98bd878030c8e975c3cc3ce759 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 12:13:22 +0100
Subject: [PATCH 020/295] [kandinsly] Rename utf8decoder as utf8_decoder

---
 kandinsky/Makefile                                            | 4 ++--
 .../kandinsky/unicode/{utf8decoder.h => utf8_decoder.h}       | 4 ++--
 kandinsky/src/context_text.cpp                                | 2 +-
 kandinsky/src/font.cpp                                        | 2 +-
 kandinsky/src/unicode/{utf8decoder.cpp => utf8_decoder.cpp}   | 2 +-
 kandinsky/test/utf8decoder.cpp                                | 2 +-
 poincare/src/parsing/tokenizer.cpp                            | 2 +-
 7 files changed, 9 insertions(+), 9 deletions(-)
 rename kandinsky/include/kandinsky/unicode/{utf8decoder.h => utf8_decoder.h} (90%)
 rename kandinsky/src/unicode/{utf8decoder.cpp => utf8_decoder.cpp} (96%)

diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index af4804052..368948437 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -13,7 +13,7 @@ src += $(addprefix kandinsky/src/,\
   ion_context.cpp \
   point.cpp \
   rect.cpp \
-  unicode/utf8decoder.cpp\
+  unicode/utf8_decoder.cpp\
 )
 
 src += $(addprefix kandinsky/fonts/, \
@@ -25,7 +25,7 @@ tests += $(addprefix kandinsky/test/,\
   color.cpp\
   font.cpp\
   rect.cpp\
-  utf8decoder.cpp\
+  utf8_decoder.cpp\
 )
 
 RASTERIZER_CFLAGS := -std=c99 `pkg-config freetype2 --cflags`
diff --git a/kandinsky/include/kandinsky/unicode/utf8decoder.h b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
similarity index 90%
rename from kandinsky/include/kandinsky/unicode/utf8decoder.h
rename to kandinsky/include/kandinsky/unicode/utf8_decoder.h
index fcabe859a..f4dab5269 100644
--- a/kandinsky/include/kandinsky/unicode/utf8decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
@@ -1,5 +1,5 @@
-#ifndef KANDINSKY_UNICODE_UTF8DECODER_H
-#define KANDINSKY_UNICODE_UTF8DECODER_H
+#ifndef KANDINSKY_UNICODE_UTF8_DECODER_H
+#define KANDINSKY_UNICODE_UTF8_DECODER_H
 
 #include <stddef.h>
 #include "code_point.h"
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index 05728dbba..860d9da65 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <kandinsky/context.h>
 #include <kandinsky/font.h>
-#include <kandinsky/unicode/utf8decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 constexpr static int k_tabCharacterWidth = 4;
 
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 6f48d7814..a921b4a4b 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <kandinsky/font.h>
 #include <ion.h>
-#include <kandinsky/unicode/utf8decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 constexpr static int k_tabCharacterWidth = 4;
 
diff --git a/kandinsky/src/unicode/utf8decoder.cpp b/kandinsky/src/unicode/utf8_decoder.cpp
similarity index 96%
rename from kandinsky/src/unicode/utf8decoder.cpp
rename to kandinsky/src/unicode/utf8_decoder.cpp
index 5648df4df..bdb6ed370 100644
--- a/kandinsky/src/unicode/utf8decoder.cpp
+++ b/kandinsky/src/unicode/utf8_decoder.cpp
@@ -1,4 +1,4 @@
-#include <kandinsky/unicode/utf8decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <assert.h>
 
 static inline int leading_ones(uint8_t value) {
diff --git a/kandinsky/test/utf8decoder.cpp b/kandinsky/test/utf8decoder.cpp
index 1198166a6..3c649f3b7 100644
--- a/kandinsky/test/utf8decoder.cpp
+++ b/kandinsky/test/utf8decoder.cpp
@@ -1,5 +1,5 @@
 #include <quiz.h>
-#include <kandinsky/unicode/utf8decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 void assert_decodes_to(const char * string, CodePoint c) {
   UTF8Decoder d(string);
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 0dfa5e0fa..9b7d440f7 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -1,7 +1,7 @@
 #include "tokenizer.h"
 #include <ion/charset.h>
 #include <poincare/number.h>
-#include <kandinsky/unicode/utf8decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 namespace Poincare {
 

From 3f56cb70415a13b09090f258fdff49449ecaa425 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 14:02:50 +0100
Subject: [PATCH 021/295] [poincare] CodePointLayout

---
 .../include/kandinsky/unicode/code_point.h    |  10 +-
 poincare/Makefile                             |   1 +
 poincare/include/poincare/code_point_layout.h |  76 ++++++++++++
 poincare/include/poincare/layout.h            |   1 +
 poincare/include/poincare/layout_node.h       |   1 +
 .../include/poincare/serialization_helper.h   |   9 +-
 poincare/include/poincare_layouts.h           |   1 +
 poincare/src/code_point_layout.cpp            | 108 ++++++++++++++++++
 poincare/src/serialization_helper.cpp         |  18 +++
 9 files changed, 219 insertions(+), 6 deletions(-)
 create mode 100644 poincare/include/poincare/code_point_layout.h
 create mode 100644 poincare/src/code_point_layout.cpp

diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
index 033e96407..fc32a7b1a 100644
--- a/kandinsky/include/kandinsky/unicode/code_point.h
+++ b/kandinsky/include/kandinsky/unicode/code_point.h
@@ -16,8 +16,12 @@ private:
   uint32_t m_code;
 };
 
-static constexpr CodePoint KDCodePointNull = 0x0;
-static constexpr CodePoint KDCodePointTabulation = 0x9;
-static constexpr CodePoint KDCodePointLineFeed = 0xA;
+static constexpr CodePoint KDCodePointNull                      = 0x0;
+static constexpr CodePoint KDCodePointTabulation                = 0x9;
+static constexpr CodePoint KDCodePointLineFeed                  = 0xA;
+static constexpr CodePoint KDCodePointMiddleDot                 = 0xB7;
+static constexpr CodePoint KDCodePointMultiplicationSign        = 0xD7;
+static constexpr CodePoint KDCodePointLatinLetterSmallCapitalE  = 0x1d07;
+static constexpr CodePoint KDCodePointRightwardsArrow           = 0x2192;
 
 #endif
diff --git a/poincare/Makefile b/poincare/Makefile
index 4a41680f9..cc7f7e2df 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -5,6 +5,7 @@ src += $(addprefix poincare/src/,\
   bracket_layout.cpp \
   bracket_pair_layout.cpp \
   char_layout.cpp \
+  code_point_layout.cpp\
   condensed_sum_layout.cpp \
   conjugate_layout.cpp \
   empty_layout.cpp \
diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
new file mode 100644
index 000000000..06f5adb91
--- /dev/null
+++ b/poincare/include/poincare/code_point_layout.h
@@ -0,0 +1,76 @@
+#ifndef POINCARE_CODEPOINT_LAYOUT_NODE_H
+#define POINCARE_CODEPOINT_LAYOUT_NODE_H
+
+#include <kandinsky/include/kandinsky/unicode/code_point.h>
+#include <poincare/layout_cursor.h>
+#include <poincare/layout.h>
+
+namespace Poincare {
+
+/* TODO: Make several code point classes depending on codepoint size?
+ * (m_codePoint sometimes fits in a char, no need for a whole CodePoint */
+
+class CodePointLayoutNode final : public LayoutNode {
+public:
+  static constexpr const KDFont * k_defaultFont = KDFont::LargeFont;
+  CodePointLayoutNode(CodePoint c = KDCodePointNull, const KDFont * font = k_defaultFont) :
+    LayoutNode(),
+    m_codePoint(c),
+    m_font(font)
+  {}
+
+  // CodePointLayout
+  CodePoint codePoint() const { return m_codePoint; }
+  const KDFont * font() const { return m_font; }
+
+  // LayoutNode
+  void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
+  void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
+  int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
+  bool isCodePoint() const override { return true; }
+  bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override;
+  bool canBeOmittedMultiplicationLeftFactor() const override;
+  bool canBeOmittedMultiplicationRightFactor() const override;
+
+  // TreeNode
+  size_t size() const override { return sizeof(CodePointLayoutNode); }
+  int numberOfChildren() const override { return 0; }
+#if POINCARE_TREE_LOG
+  virtual void logNodeName(std::ostream & stream) const override {
+    stream << "CodePointLayout";
+  }
+  virtual void logAttributes(std::ostream & stream) const override {
+    stream << " CodePoint=\"" << m_codePoint << "\"";
+  }
+#endif
+
+protected:
+  // LayoutNode
+  KDSize computeSize() override;
+  KDCoordinate computeBaseline() override;
+  KDPoint positionOfChild(LayoutNode * child) override {
+    assert(false);
+    return KDPointZero;
+  }
+
+private:
+  void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
+  bool isMultiplicationCodePoint() const;
+  CodePoint m_codePoint;
+  const KDFont * m_font;
+};
+
+class CodePointLayout final : public Layout {
+public:
+  CodePointLayout(const CodePointLayoutNode * n) : Layout(n) {}
+  static CharLayout Builder(CodePoint c, const KDFont * font = KDFont::LargeFont);
+  const KDFont * font() const { return const_cast<CodePointLayout *>(this)->node()->font(); }
+  CodePoint codePoint() const { return const_cast<CodePointLayout *>(this)->node()->codePoint(); }
+private:
+  using Layout::node;
+  CodePointLayoutNode * node() { return static_cast<CodePointLayoutNode *>(Layout::node()); }
+};
+
+}
+
+#endif
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index 2dfffdcd9..bf70fba41 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -50,6 +50,7 @@ public:
   bool isVerticalOffset() const { return const_cast<Layout *>(this)->node()->isVerticalOffset(); }
   bool isLeftParenthesis() const { return const_cast<Layout *>(this)->node()->isLeftParenthesis(); }
   bool isChar() const { return const_cast<Layout *>(this)->node()->isChar(); }
+  bool isCodePoint() const { return const_cast<Layout *>(this)->node()->isCodePoint(); }
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const { return const_cast<Layout *>(this)->node()->isCollapsable(numberOfOpenParenthesis, goingLeft); }
   int leftCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->leftCollapsingAbsorbingChildIndex(); }
   int rightCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->rightCollapsingAbsorbingChildIndex(); }
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index 40a2afe41..c10120091 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -105,6 +105,7 @@ public:
   virtual bool isEmpty() const { return false; }
   virtual bool isMatrix() const { return false; }
   virtual bool isChar() const { return false; }
+  virtual bool isCodePoint() const { return false; }
   virtual bool hasUpperLeftIndex() const { return false; }
   virtual char XNTChar() const {
     LayoutNode * p = parent();
diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index 2135d0aea..c2406302d 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -2,11 +2,12 @@
 #define POINCARE_SERIALIZATION_HELPER_H
 
 #include <poincare/tree_node.h>
+#include <kandinsky/include/kandinsky/unicode/code_point.h>
 
 namespace Poincare {
 
 namespace SerializationHelper {
-  /* SerializableReference to Text */
+  // SerializableReference to text
   int Infix(
       const TreeNode * node,
       char * buffer,
@@ -26,8 +27,10 @@ namespace SerializationHelper {
       const char * operatorName,
       bool writeFirstChild = true);
 
-  /* Write one char in buffer */
-  int Char(char * buffer, int bufferSize, char charToWrite);
+  // Write one char in buffer
+  int Char(char * buffer, int bufferSize, char charToWrite); // TODO REMOVE
+  // Write one code point in a buffer
+  int CodePoint(char * buffer, int bufferSize, CodePoint c);
 };
 
 }
diff --git a/poincare/include/poincare_layouts.h b/poincare/include/poincare_layouts.h
index 743d99bac..3cf5ee953 100644
--- a/poincare/include/poincare_layouts.h
+++ b/poincare/include/poincare_layouts.h
@@ -7,6 +7,7 @@
 #include <poincare/binomial_coefficient_layout.h>
 #include <poincare/bracket_pair_layout.h>
 #include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/ceiling_layout.h>
 #include <poincare/condensed_sum_layout.h>
 #include <poincare/conjugate_layout.h>
diff --git a/poincare/src/code_point_layout.cpp b/poincare/src/code_point_layout.cpp
new file mode 100644
index 000000000..2e052164c
--- /dev/null
+++ b/poincare/src/code_point_layout.cpp
@@ -0,0 +1,108 @@
+#include <poincare/code_point_layout.h>
+#include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
+
+namespace Poincare {
+
+// LayoutNode
+void CodePointLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
+  if (cursor->position() == LayoutCursor::Position::Right) {
+    cursor->setPosition(LayoutCursor::Position::Left);
+    return;
+  }
+  LayoutNode * parentNode = parent();
+  if (parentNode != nullptr) {
+    parentNode->moveCursorLeft(cursor, shouldRecomputeLayout);
+  }
+}
+
+void CodePointLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
+  if (cursor->position() == LayoutCursor::Position::Left) {
+    cursor->setPosition(LayoutCursor::Position::Right);
+    return;
+  }
+  LayoutNode * parentNode = parent();
+  if (parentNode != nullptr) {
+    parentNode->moveCursorRight(cursor, shouldRecomputeLayout);
+  }
+}
+
+int CodePointLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
+  return SerializationHelper::CodePoint(buffer, bufferSize, m_codePoint);
+}
+
+bool CodePointLayoutNode::isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const {
+  if (*numberOfOpenParenthesis <= 0) {
+    if (m_codePoint == '+'
+        || m_codePoint == KDCodePointRightwardsArrow
+        || m_codePoint == '='
+        || m_codePoint == ',')
+    {
+      return false;
+    }
+    if (m_codePoint == '-') {
+      /* If the expression is like 3ᴇ-200, we want '-' to be collapsable.
+       * Otherwise, '-' is not collapsable. */
+      Layout thisRef = CodePointLayout(this);
+      Layout parent = thisRef.parent();
+      if (!parent.isUninitialized()) {
+        int indexOfThis = parent.indexOfChild(thisRef);
+        if (indexOfThis > 0) {
+          Layout leftBrother = parent.childAtIndex(indexOfThis-1);
+          if (leftBrother.isCodePoint()
+              && static_cast<CodePointLayout&>(leftBrother).codePoint() == KDCodePointLatinLetterSmallCapitalE)
+          {
+            return true;
+          }
+        }
+      }
+      return false;
+    }
+  }
+  return true;
+}
+
+bool CodePointLayoutNode::canBeOmittedMultiplicationLeftFactor() const {
+  if (isMultiplicationCodePoint()) {
+    return false;
+  }
+  return LayoutNode::canBeOmittedMultiplicationRightFactor();
+}
+
+bool CodePointLayoutNode::canBeOmittedMultiplicationRightFactor() const {
+  if (m_codePoint == '!' || isMultiplicationCodePoint()) {
+    return false;
+  }
+  return LayoutNode::canBeOmittedMultiplicationRightFactor();
+}
+
+// Sizing and positioning
+KDSize CodePointLayoutNode::computeSize() {
+  return m_font->glyphSize();
+}
+
+KDCoordinate CodePointLayoutNode::computeBaseline() {
+  return m_font->glyphSize().height()/2;
+}
+
+void CodePointLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
+  constexpr int bufferSize = sizeof(CodePoint)/sizeof(char) + 1; // Null-terminating char
+  char buffer[bufferSize];
+  SerializationHelper::CodePoint(buffer, bufferSize, m_codePoint);
+  ctx->drawString(buffer, p, m_font, expressionColor, backgroundColor);
+}
+
+bool CodePointLayoutNode::isMultiplicationCodePoint() const {
+  return m_codePoint == '*'
+    || m_codePoint == KDCodePointMultiplicationSign
+    || m_codePoint == KDCodePointMiddleDot;
+}
+
+CodePointLayout CodePointLayout::Builder(CodePoint c, const KDFont * font) {
+  void * bufferNode = TreePool::sharedPool()->alloc(sizeof(CodePointLayoutNode));
+  CodePointLayoutNode * node = new (bufferNode) CodePointLayoutNode(c, font);
+  TreeHandle h = TreeHandle::BuildWithGhostChildren(node);
+  return static_cast<CodePointLayout &>(h);
+}
+
+}
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 3375d3b6f..c255bd160 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -1,4 +1,5 @@
 #include <poincare/serialization_helper.h>
+#include <kandinsky/include/kandinsky/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
@@ -149,4 +150,21 @@ int SerializationHelper::Char(char * buffer, int bufferSize, char charToWrite) {
   return 1;
 }
 
+int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoint c) {
+  if (bufferSize == 0) {
+    return -1;
+  }
+  if (bufferSize == 1) {
+    buffer[0] = 0;
+    return 0;
+  }
+  constexpr int maxCodePointSize = sizeof(class CodePoint)/sizeof(char) + 1; // Null-terminating char
+  char helpBuffer[maxCodePointSize];
+  size_t size = UTF8Decoder::CodePointToChars(c, helpBuffer, maxCodePointSize);
+  assert(size < maxCodePointSize);
+  helpBuffer[size] = 0;
+  strlcpy(buffer, helpBuffer, bufferSize);
+  return strlen(buffer);
+}
+
 }

From f576e31ff11326a8dbc8409971b807ccbe4021dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 14:09:45 +0100
Subject: [PATCH 022/295] [apps/poincare] Replace CharLayouts with
 CodePointLayouts

---
 apps/regression/calculation_controller.cpp    |   4 +-
 apps/regression/model/cubic_model.cpp         |  32 ++---
 apps/regression/model/exponential_model.cpp   |  14 +--
 apps/regression/model/linear_model.cpp        |  12 +-
 apps/regression/model/logarithmic_model.cpp   |  20 ++--
 apps/regression/model/logistic_model.cpp      |  22 ++--
 apps/regression/model/power_model.cpp         |  10 +-
 apps/regression/model/quadratic_model.cpp     |  22 ++--
 apps/regression/model/quartic_model.cpp       |  42 +++----
 apps/regression/model/trigonometric_model.cpp |  30 ++---
 apps/sequence/graph/term_sum_controller.cpp   |   6 +-
 apps/sequence/list/sequence_toolbox.cpp       |   8 +-
 .../list/type_parameter_controller.cpp        |   4 +-
 apps/sequence/sequence.cpp                    |  16 +--
 apps/sequence/sequence_title_cell.h           |   2 +-
 .../sub_menu/preferences_controller.cpp       |   4 +-
 apps/solver/list_controller.cpp               |   4 +-
 apps/solver/solutions_controller.cpp          |   4 +-
 poincare/Makefile                             |   1 -
 poincare/include/poincare/char_layout.h       |  73 ------------
 poincare/include/poincare/layout.h            |   1 -
 poincare/include/poincare/layout_cursor.h     |   2 +-
 poincare/include/poincare/layout_node.h       |   5 +-
 .../include/poincare/serialization_helper.h   |   4 +-
 poincare/include/poincare_layouts.h           |   1 -
 poincare/src/char_layout.cpp                  | 106 -----------------
 poincare/src/constant.cpp                     |   2 +-
 poincare/src/equal.cpp                        |   4 +-
 poincare/src/factorial.cpp                    |   4 +-
 poincare/src/integral_layout.cpp              |   2 +-
 poincare/src/layout.cpp                       |   2 +-
 poincare/src/layout_cursor.cpp                |  20 ++--
 poincare/src/layout_helper.cpp                |   6 +-
 poincare/src/opposite.cpp                     |   4 +-
 poincare/src/product_layout.cpp               |   2 +-
 poincare/src/rational.cpp                     |   2 +-
 poincare/src/sequence_layout.cpp              |   2 +-
 poincare/src/serialization_helper.cpp         |   6 +-
 poincare/src/store.cpp                        |   4 +-
 poincare/src/sum_layout.cpp                   |   2 +-
 poincare/src/symbol.cpp                       |  16 +--
 poincare/test/fraction_layout.cpp             |   8 +-
 poincare/test/layouts.cpp                     | 110 +++++++++---------
 poincare/test/parentheses_layout.cpp          |  12 +-
 poincare/test/vertical_offset_layout.cpp      |   2 +-
 45 files changed, 238 insertions(+), 421 deletions(-)
 delete mode 100644 poincare/include/poincare/char_layout.h
 delete mode 100644 poincare/src/char_layout.cpp

diff --git a/apps/regression/calculation_controller.cpp b/apps/regression/calculation_controller.cpp
index 895256377..02446c0f3 100644
--- a/apps/regression/calculation_controller.cpp
+++ b/apps/regression/calculation_controller.cpp
@@ -1,7 +1,7 @@
 #include "calculation_controller.h"
 #include "../apps_container.h"
 #include "../shared/poincare_helpers.h"
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
 #include <assert.h>
@@ -25,7 +25,7 @@ CalculationController::CalculationController(Responder * parentResponder, Button
   m_hideableCell(),
   m_store(store)
 {
-  m_r2Layout = HorizontalLayout::Builder(CharLayout::Builder('r', KDFont::SmallFont), VerticalOffsetLayout::Builder(CharLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript));
+  m_r2Layout = HorizontalLayout::Builder(CodePointLayout::Builder('r', KDFont::SmallFont), VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript));
   m_selectableTableView.setVerticalCellOverlap(0);
   m_selectableTableView.setBackgroundColor(Palette::WallScreenDark);
   m_selectableTableView.setMargins(k_margin, k_scrollBarMargin, k_scrollBarMargin, k_margin);
diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index 5147ff5f5..39cf2139b 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -2,7 +2,7 @@
 #include "../../shared/poincare_helpers.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/decimal.h>
@@ -20,27 +20,27 @@ namespace Regression {
 Layout CubicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('3', KDFont::SmallFont),
+          CodePointLayout::Builder('3', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('c', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('d', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('c', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('d', KDFont::SmallFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 15);
   }
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index 320d99b45..4b2c3fa5d 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -1,7 +1,7 @@
 #include "exponential_model.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
@@ -12,14 +12,14 @@ namespace Regression {
 Layout ExponentialModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(
-            CharLayout::Builder('b', KDFont::SmallFont),
-            CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-            CharLayout::Builder('X', KDFont::SmallFont)
+            CodePointLayout::Builder('b', KDFont::SmallFont),
+            CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+            CodePointLayout::Builder('X', KDFont::SmallFont)
           ),
           VerticalOffsetLayoutNode::Type::Superscript
         )
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index 92e03af93..116126fc5 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -2,7 +2,7 @@
 #include "../store.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 
 using namespace Poincare;
@@ -12,11 +12,11 @@ namespace Regression {
 Layout LinearModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 5);
   }
diff --git a/apps/regression/model/logarithmic_model.cpp b/apps/regression/model/logarithmic_model.cpp
index fb7563928..255ef5268 100644
--- a/apps/regression/model/logarithmic_model.cpp
+++ b/apps/regression/model/logarithmic_model.cpp
@@ -2,7 +2,7 @@
 #include "../store.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 
 using namespace Poincare;
@@ -12,15 +12,15 @@ namespace Regression {
 Layout LogarithmicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('l', KDFont::SmallFont),
-      CharLayout::Builder('n', KDFont::SmallFont),
-      CharLayout::Builder('(', KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder(')', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont)
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('l', KDFont::SmallFont),
+      CodePointLayout::Builder('n', KDFont::SmallFont),
+      CodePointLayout::Builder('(', KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder(')', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont)
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 9);
   }
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index ad0ea7503..5f637e798 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -1,7 +1,7 @@
 #include "logistic_model.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/fraction_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
@@ -13,24 +13,24 @@ namespace Regression {
 Layout LogisticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout exponentLayoutChildren[] = {
-      CharLayout::Builder('-', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont)
+      CodePointLayout::Builder('-', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont)
     };
     Layout layoutChildren[] = {
-      CharLayout::Builder('1', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('1', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(exponentLayoutChildren, 4),
           VerticalOffsetLayoutNode::Type::Superscript
         )
     };
     m_layout = FractionLayout::Builder(
-       CharLayout::Builder('c', KDFont::SmallFont),
+       CodePointLayout::Builder('c', KDFont::SmallFont),
        HorizontalLayout::Builder(layoutChildren, 6)
       );
   }
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index bd790d815..7a5dcc992 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -2,7 +2,7 @@
 #include "../store.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
@@ -13,11 +13,11 @@ namespace Regression {
 Layout PowerModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('b', KDFont::SmallFont),
+          CodePointLayout::Builder('b', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
       };
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index 0ee0b1764..16d9fd6c9 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -2,7 +2,7 @@
 #include "../../shared/poincare_helpers.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/decimal.h>
@@ -20,19 +20,19 @@ namespace Regression {
 Layout QuadraticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('c', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('c', KDFont::SmallFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 10);
   }
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 3f7a4395a..163880fae 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -2,7 +2,7 @@
 #include "../../shared/poincare_helpers.h"
 #include <math.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/decimal.h>
@@ -20,35 +20,35 @@ namespace Regression {
 Layout QuarticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('4', KDFont::SmallFont),
+          CodePointLayout::Builder('4', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('3', KDFont::SmallFont),
+          CodePointLayout::Builder('3', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('c', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('c', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          CharLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('d', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('d', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('e', KDFont::SmallFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 20);
   }
diff --git a/apps/regression/model/trigonometric_model.cpp b/apps/regression/model/trigonometric_model.cpp
index 2a605cdde..8fceb306f 100644
--- a/apps/regression/model/trigonometric_model.cpp
+++ b/apps/regression/model/trigonometric_model.cpp
@@ -3,7 +3,7 @@
 #include <math.h>
 #include <poincare/preferences.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/number.h>
@@ -21,20 +21,20 @@ namespace Regression {
 Layout TrigonometricModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
-      CharLayout::Builder('a', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('s', KDFont::SmallFont),
-      CharLayout::Builder('i', KDFont::SmallFont),
-      CharLayout::Builder('n', KDFont::SmallFont),
-      CharLayout::Builder('(', KDFont::SmallFont),
-      CharLayout::Builder('b', KDFont::SmallFont),
-      CharLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
-      CharLayout::Builder('X', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('c', KDFont::SmallFont),
-      CharLayout::Builder(')', KDFont::SmallFont),
-      CharLayout::Builder('+', KDFont::SmallFont),
-      CharLayout::Builder('d', KDFont::SmallFont)
+      CodePointLayout::Builder('a', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('s', KDFont::SmallFont),
+      CodePointLayout::Builder('i', KDFont::SmallFont),
+      CodePointLayout::Builder('n', KDFont::SmallFont),
+      CodePointLayout::Builder('(', KDFont::SmallFont),
+      CodePointLayout::Builder('b', KDFont::SmallFont),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('c', KDFont::SmallFont),
+      CodePointLayout::Builder(')', KDFont::SmallFont),
+      CodePointLayout::Builder('+', KDFont::SmallFont),
+      CodePointLayout::Builder('d', KDFont::SmallFont)
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, 14);
   }
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 35fcfb49f..17b59c943 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -1,7 +1,7 @@
 #include "term_sum_controller.h"
 #include "../../shared/text_field_delegate.h"
 #include "../app.h"
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
@@ -51,9 +51,9 @@ double TermSumController::cursorNextStep(double x, int direction) {
 
 Layout TermSumController::createFunctionLayout(const char * functionName) {
   return HorizontalLayout::Builder(
-      CharLayout::Builder(functionName[0], KDFont::SmallFont),
+      CodePointLayout::Builder(functionName[0], KDFont::SmallFont),
         VerticalOffsetLayout::Builder(
-          CharLayout::Builder('n', KDFont::SmallFont),
+          CodePointLayout::Builder('n', KDFont::SmallFont),
           VerticalOffsetLayoutNode::Type::Subscript
         )
       );
diff --git a/apps/sequence/list/sequence_toolbox.cpp b/apps/sequence/list/sequence_toolbox.cpp
index 5dbcd3380..0742fc4bd 100644
--- a/apps/sequence/list/sequence_toolbox.cpp
+++ b/apps/sequence/list/sequence_toolbox.cpp
@@ -2,7 +2,7 @@
 #include "../sequence_store.h"
 #include <poincare/layout_helper.h>
 #include <assert.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
 using namespace Poincare;
@@ -77,18 +77,18 @@ void SequenceToolbox::buildExtraCellsLayouts(const char * sequenceName, int recu
   for (int j = 0; j < recurrenceDepth; j++) {
     const char * indice = j == 0 ? "n" : "n+1";
     m_addedCellLayout[j] = HorizontalLayout::Builder(
-        CharLayout::Builder(sequenceName[0], KDFont::LargeFont),
+        CodePointLayout::Builder(sequenceName[0], KDFont::LargeFont),
         VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
     m_addedCellLayout[j+recurrenceDepth] = HorizontalLayout::Builder(
-        CharLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
+        CodePointLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
         VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
   }
   if (recurrenceDepth < 2) {
     const char * indice = recurrenceDepth == 0 ? "n" : (recurrenceDepth == 1 ? "n+1" : "n+2");
     m_addedCellLayout[2*recurrenceDepth] = HorizontalLayout::Builder(
-        CharLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
+        CodePointLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
         VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
   }
diff --git a/apps/sequence/list/type_parameter_controller.cpp b/apps/sequence/list/type_parameter_controller.cpp
index 71bace67e..75bbd12e0 100644
--- a/apps/sequence/list/type_parameter_controller.cpp
+++ b/apps/sequence/list/type_parameter_controller.cpp
@@ -3,7 +3,7 @@
 #include "../app.h"
 #include <assert.h>
 #include <poincare/layout_helper.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
 using namespace Poincare;
@@ -116,7 +116,7 @@ void TypeParameterController::willDisplayCellAtLocation(HighlightCell * cell, in
   }
   const char * subscripts[3] = {"n", "n+1", "n+2"};
   m_layouts[j] = HorizontalLayout::Builder(
-        CharLayout::Builder(nextName[0], font),
+        CodePointLayout::Builder(nextName[0], font),
         VerticalOffsetLayout::Builder(LayoutHelper::String(subscripts[j], strlen(subscripts[j]), font), VerticalOffsetLayoutNode::Type::Subscript)
       );
   ExpressionTableCellWithPointer * myCell = (ExpressionTableCellWithPointer *)cell;
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index d413343b0..e108f1b25 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -2,7 +2,7 @@
 #include "sequence_store.h"
 #include "cache_context.h"
 #include <poincare/layout_helper.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/integer.h>
 #include "../shared/poincare_helpers.h"
@@ -147,8 +147,8 @@ int Sequence::numberOfElements() {
 Poincare::Layout Sequence::nameLayout() {
   if (m_nameLayout.isUninitialized()) {
     m_nameLayout = HorizontalLayout::Builder(
-        CharLayout::Builder(name()[0], KDFont::SmallFont),
-        VerticalOffsetLayout::Builder(CharLayout::Builder('n', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
+        CodePointLayout::Builder(name()[0], KDFont::SmallFont),
+        VerticalOffsetLayout::Builder(CodePointLayout::Builder('n', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
   }
   return m_nameLayout;
@@ -158,16 +158,16 @@ Poincare::Layout Sequence::definitionName() {
   if (m_definitionName.isUninitialized()) {
     if (m_type == Type::Explicit) {
       m_definitionName = HorizontalLayout::Builder(
-          CharLayout::Builder(name()[0], k_layoutFont),
+          CodePointLayout::Builder(name()[0], k_layoutFont),
           VerticalOffsetLayout::Builder(LayoutHelper::String("n", 1, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
     } else if (m_type == Type::SingleRecurrence) {
       m_definitionName = HorizontalLayout::Builder(
-          CharLayout::Builder(name()[0], k_layoutFont),
+          CodePointLayout::Builder(name()[0], k_layoutFont),
           VerticalOffsetLayout::Builder(LayoutHelper::String("n+1", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
     } else {
       assert(m_type == Type::DoubleRecurrence);
       m_definitionName = HorizontalLayout::Builder(
-          CharLayout::Builder(name()[0], k_layoutFont),
+          CodePointLayout::Builder(name()[0], k_layoutFont),
           VerticalOffsetLayout::Builder(LayoutHelper::String("n+2", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
     }
   }
@@ -183,7 +183,7 @@ Poincare::Layout Sequence::firstInitialConditionName() {
   {
     Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
     m_firstInitialConditionName = HorizontalLayout::Builder(
-        CharLayout::Builder(name()[0], k_layoutFont),
+        CodePointLayout::Builder(name()[0], k_layoutFont),
         VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
   }
   return m_firstInitialConditionName;
@@ -196,7 +196,7 @@ Poincare::Layout Sequence::secondInitialConditionName() {
     if (m_type == Type::DoubleRecurrence) {
       Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
       m_secondInitialConditionName = HorizontalLayout::Builder(
-        CharLayout::Builder(name()[0], k_layoutFont),
+        CodePointLayout::Builder(name()[0], k_layoutFont),
         VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
     }
   }
diff --git a/apps/sequence/sequence_title_cell.h b/apps/sequence/sequence_title_cell.h
index 1f6b92c67..bcebbd4a9 100644
--- a/apps/sequence/sequence_title_cell.h
+++ b/apps/sequence/sequence_title_cell.h
@@ -15,7 +15,7 @@ public:
   void setColor(KDColor color) override;
   void setOrientation(Orientation orientation) override;
   const KDFont * font() const override {
-    return Poincare::CharLayoutNode::k_defaultFont;
+    return Poincare::CodePointLayoutNode::k_defaultFont;
   }
   Poincare::Layout layout() const override {
     return m_titleTextView.layout();
diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index bb96f02cf..65baa91eb 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -4,7 +4,7 @@
 #include <assert.h>
 #include <cmath>
 #include <poincare/layout_helper.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/fraction_layout.h>
 #include <poincare/vertical_offset_layout.h>
 
@@ -84,7 +84,7 @@ Layout layoutForPreferences(I18n::Message message) {
     // Complex format
     case I18n::Message::Real:
     {
-      return CharLayout::Builder('x', KDFont::SmallFont);
+      return CodePointLayout::Builder('x', KDFont::SmallFont);
     }
     case I18n::Message::Cartesian:
     {
diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index d46095f21..1f8fc7434 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -1,6 +1,6 @@
 #include "list_controller.h"
 #include "app.h"
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <assert.h>
 
 using namespace Shared;
@@ -124,7 +124,7 @@ bool textRepresentsAnEquality(const char * text) {
 bool layoutRepresentsAnEquality(Poincare::Layout l) {
   Poincare::Layout match = l.recursivelyMatches(
       [](Poincare::Layout layout) {
-      return layout.isChar() && static_cast<Poincare::CharLayout &>(layout).character() == '='; });
+      return layout.isCodePoint() && static_cast<Poincare::CodePointLayout &>(layout).codePoint() == '='; });
   return !match.isUninitialized();
 }
 
diff --git a/apps/solver/solutions_controller.cpp b/apps/solver/solutions_controller.cpp
index f9b97405b..1f01562a7 100644
--- a/apps/solver/solutions_controller.cpp
+++ b/apps/solver/solutions_controller.cpp
@@ -5,7 +5,7 @@
 #include <assert.h>
 #include <limits.h>
 #include <poincare/layout_helper.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/symbol_abstract.h>
 #include <poincare/vertical_offset_layout.h>
@@ -75,7 +75,7 @@ SolutionsController::SolutionsController(Responder * parentResponder, EquationSt
   m_delta2Layout(),
   m_contentView(this)
 {
-  m_delta2Layout = HorizontalLayout::Builder(VerticalOffsetLayout::Builder(CharLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript), LayoutHelper::String("-4ac", 4, KDFont::SmallFont));
+  m_delta2Layout = HorizontalLayout::Builder(VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript), LayoutHelper::String("-4ac", 4, KDFont::SmallFont));
   char deltaB[] = {Ion::Charset::CapitalDelta, '=', 'b'};
   static_cast<HorizontalLayout&>(m_delta2Layout).addOrMergeChildAtIndex(LayoutHelper::String(deltaB, 3, KDFont::SmallFont), 0, false);
   for (int i = 0; i < EquationStore::k_maxNumberOfExactSolutions; i++) {
diff --git a/poincare/Makefile b/poincare/Makefile
index cc7f7e2df..d6a13b974 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -4,7 +4,6 @@ src += $(addprefix poincare/src/,\
   binomial_coefficient_layout.cpp \
   bracket_layout.cpp \
   bracket_pair_layout.cpp \
-  char_layout.cpp \
   code_point_layout.cpp\
   condensed_sum_layout.cpp \
   conjugate_layout.cpp \
diff --git a/poincare/include/poincare/char_layout.h b/poincare/include/poincare/char_layout.h
deleted file mode 100644
index c206d39b8..000000000
--- a/poincare/include/poincare/char_layout.h
+++ /dev/null
@@ -1,73 +0,0 @@
-#ifndef POINCARE_CHAR_LAYOUT_NODE_H
-#define POINCARE_CHAR_LAYOUT_NODE_H
-
-#include <poincare/layout_cursor.h>
-#include <poincare/layout.h>
-#include <ion/charset.h>
-
-namespace Poincare {
-
-class CharLayoutNode final : public LayoutNode {
-public:
-  static constexpr const KDFont * k_defaultFont = KDFont::LargeFont;
-  CharLayoutNode(char c = Ion::Charset::Empty, const KDFont * font = k_defaultFont) :
-    LayoutNode(),
-    m_char(c),
-    m_font(font)
-  {}
-
-  // CharLayout
-  char character() const { return m_char; }
-  const KDFont * font() const { return m_font; }
-
-  // LayoutNode
-  void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
-  void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
-  int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
-  bool isChar() const override { return true; }
-  bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override;
-  bool canBeOmittedMultiplicationLeftFactor() const override;
-  bool canBeOmittedMultiplicationRightFactor() const override;
-
-  // TreeNode
-  size_t size() const override { return sizeof(CharLayoutNode); }
-  int numberOfChildren() const override { return 0; }
-#if POINCARE_TREE_LOG
-  virtual void logNodeName(std::ostream & stream) const override {
-    stream << "CharLayout";
-  }
-  virtual void logAttributes(std::ostream & stream) const override {
-    stream << " char=\"" << m_char << "\"";
-  }
-#endif
-
-protected:
-  // LayoutNode
-  KDSize computeSize() override;
-  KDCoordinate computeBaseline() override;
-  KDPoint positionOfChild(LayoutNode * child) override {
-    assert(false);
-    return KDPointZero;
-  }
-
-private:
-  void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
-  bool isMultiplicationChar() const;
-  char m_char;
-  const KDFont * m_font;
-};
-
-class CharLayout final : public Layout {
-public:
-  CharLayout(const CharLayoutNode * n) : Layout(n) {}
-  static CharLayout Builder(char c, const KDFont * font = KDFont::LargeFont);
-  const KDFont * font() const { return const_cast<CharLayout *>(this)->node()->font(); }
-  char character() const {return const_cast<CharLayout *>(this)->node()->character();}
-private:
-  using Layout::node;
-  CharLayoutNode * node() { return static_cast<CharLayoutNode *>(Layout::node());}
-};
-
-}
-
-#endif
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index bf70fba41..306b93355 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -49,7 +49,6 @@ public:
   bool isMatrix() const { return const_cast<Layout *>(this)->node()->isMatrix(); }
   bool isVerticalOffset() const { return const_cast<Layout *>(this)->node()->isVerticalOffset(); }
   bool isLeftParenthesis() const { return const_cast<Layout *>(this)->node()->isLeftParenthesis(); }
-  bool isChar() const { return const_cast<Layout *>(this)->node()->isChar(); }
   bool isCodePoint() const { return const_cast<Layout *>(this)->node()->isCodePoint(); }
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const { return const_cast<Layout *>(this)->node()->isCollapsable(numberOfOpenParenthesis, goingLeft); }
   int leftCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->leftCollapsingAbsorbingChildIndex(); }
diff --git a/poincare/include/poincare/layout_cursor.h b/poincare/include/poincare/layout_cursor.h
index 17f99143c..764023e04 100644
--- a/poincare/include/poincare/layout_cursor.h
+++ b/poincare/include/poincare/layout_cursor.h
@@ -109,7 +109,7 @@ public:
   void addEmptySquarePowerLayout();
   void addEmptyTenPowerLayout();
   void addFractionLayoutAndCollapseSiblings();
-  void addXNTCharLayout();
+  void addXNTCodePointLayout();
   void insertText(const char * text);
   void addLayoutAndMoveCursor(Layout l);
   bool showEmptyLayoutIfNeeded() { return privateShowHideEmptyLayoutIfNeeded(true); }
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index c10120091..37c8899f9 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -84,14 +84,14 @@ public:
   virtual bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const { return true; }
   /* isCollapsable is used when adding a sibling fraction: should the layout be
    * inserted in the numerator (or denominator)? For instance, 1+2|3-4 should
-   * become 1+ 2/3 - 4 when pressing "Divide": a CharLayout is collapsable if
+   * become 1+ 2/3 - 4 when pressing "Divide": a CodePointLayout is collapsable if
    * its char is not +, -, or *. */
   virtual bool canBeOmittedMultiplicationLeftFactor() const;
   virtual bool canBeOmittedMultiplicationRightFactor() const;
   /* canBeOmittedMultiplicationLeftFactor and RightFactor return true if the
    * layout, next to another layout, might be the factor of a multiplication
    * with an omitted multiplication sign. For instance, an absolute value layout
-   * returns true, because |3|2 means |3|*2. A '+' CharLayout returns false,
+   * returns true, because |3|2 means |3|*2. A '+' CodePointLayout returns false,
    * because +'something' nevers means +*'something'. */
   virtual bool mustHaveLeftSibling() const { return false; }
   virtual bool isVerticalOffset() const { return false; }
@@ -104,7 +104,6 @@ public:
   virtual bool isRightBracket() const { return false; }
   virtual bool isEmpty() const { return false; }
   virtual bool isMatrix() const { return false; }
-  virtual bool isChar() const { return false; }
   virtual bool isCodePoint() const { return false; }
   virtual bool hasUpperLeftIndex() const { return false; }
   virtual char XNTChar() const {
diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index c2406302d..6d2a0de39 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -27,8 +27,8 @@ namespace SerializationHelper {
       const char * operatorName,
       bool writeFirstChild = true);
 
-  // Write one char in buffer
-  int Char(char * buffer, int bufferSize, char charToWrite); // TODO REMOVE
+  // Write one char in a buffer
+  int Char(char * buffer, int bufferSize, char c);
   // Write one code point in a buffer
   int CodePoint(char * buffer, int bufferSize, CodePoint c);
 };
diff --git a/poincare/include/poincare_layouts.h b/poincare/include/poincare_layouts.h
index 3cf5ee953..ef9d39212 100644
--- a/poincare/include/poincare_layouts.h
+++ b/poincare/include/poincare_layouts.h
@@ -6,7 +6,6 @@
 #include <poincare/absolute_value_layout.h>
 #include <poincare/binomial_coefficient_layout.h>
 #include <poincare/bracket_pair_layout.h>
-#include <poincare/char_layout.h>
 #include <poincare/code_point_layout.h>
 #include <poincare/ceiling_layout.h>
 #include <poincare/condensed_sum_layout.h>
diff --git a/poincare/src/char_layout.cpp b/poincare/src/char_layout.cpp
deleted file mode 100644
index c938c06ff..000000000
--- a/poincare/src/char_layout.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-#include <poincare/char_layout.h>
-#include <poincare/layout_helper.h>
-#include <poincare/serialization_helper.h>
-
-namespace Poincare {
-
-// LayoutNode
-void CharLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
-  if (cursor->position() == LayoutCursor::Position::Right) {
-    cursor->setPosition(LayoutCursor::Position::Left);
-    return;
-  }
-  LayoutNode * parentNode = parent();
-  if (parentNode != nullptr) {
-    parentNode->moveCursorLeft(cursor, shouldRecomputeLayout);
-  }
-}
-
-void CharLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
-  if (cursor->position() == LayoutCursor::Position::Left) {
-    cursor->setPosition(LayoutCursor::Position::Right);
-    return;
-  }
-  LayoutNode * parentNode = parent();
-  if (parentNode != nullptr) {
-    parentNode->moveCursorRight(cursor, shouldRecomputeLayout);
-  }
-}
-
-int CharLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  return SerializationHelper::Char(buffer, bufferSize, m_char);
-}
-
-bool CharLayoutNode::isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const {
-  if (*numberOfOpenParenthesis <= 0) {
-    if (m_char == '+'
-        || m_char == Ion::Charset::Sto
-        || m_char == '='
-        || m_char == ',')
-    {
-      return false;
-    }
-    if (m_char == '-') {
-      /* If the expression is like 3E-200, we want '-' to be collapsable.
-       * Otherwise, '-' is not collapsable. */
-      Layout thisRef = CharLayout(this);
-      Layout parent = thisRef.parent();
-      if (!parent.isUninitialized()) {
-        int indexOfThis = parent.indexOfChild(thisRef);
-        if (indexOfThis > 0) {
-          Layout leftBrother = parent.childAtIndex(indexOfThis-1);
-          if (leftBrother.isChar()
-              && static_cast<CharLayout&>(leftBrother).character() == Ion::Charset::Exponent)
-          {
-            return true;
-          }
-        }
-      }
-      return false;
-    }
-  }
-  return true;
-}
-
-bool CharLayoutNode::canBeOmittedMultiplicationLeftFactor() const {
-  if (isMultiplicationChar()) {
-    return false;
-  }
-  return LayoutNode::canBeOmittedMultiplicationRightFactor();
-}
-
-bool CharLayoutNode::canBeOmittedMultiplicationRightFactor() const {
-  if (m_char == '!' || isMultiplicationChar()) {
-    return false;
-  }
-  return LayoutNode::canBeOmittedMultiplicationRightFactor();
-}
-
-// Sizing and positioning
-KDSize CharLayoutNode::computeSize() {
-  return m_font->glyphSize();
-}
-
-KDCoordinate CharLayoutNode::computeBaseline() {
-  return m_font->glyphSize().height()/2;
-}
-
-void CharLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
-  char string[2] = {m_char, 0};
-  ctx->drawString(string, p, m_font, expressionColor, backgroundColor);
-}
-
-bool CharLayoutNode::isMultiplicationChar() const {
-  return m_char == '*'
-    || m_char == Ion::Charset::MultiplicationSign
-    || m_char == Ion::Charset::MiddleDot;
-}
-
-CharLayout CharLayout::Builder(char c, const KDFont * font) {
-  void * bufferNode = TreePool::sharedPool()->alloc(sizeof(CharLayoutNode));
-  CharLayoutNode * node = new (bufferNode) CharLayoutNode(c, font);
-  TreeHandle h = TreeHandle::BuildWithGhostChildren(node);
-  return static_cast<CharLayout &>(h);
-}
-
-}
diff --git a/poincare/src/constant.cpp b/poincare/src/constant.cpp
index 6c4039c03..2f971598c 100644
--- a/poincare/src/constant.cpp
+++ b/poincare/src/constant.cpp
@@ -1,5 +1,5 @@
 #include <poincare/constant.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/layout_helper.h>
 #include <poincare/complex_cartesian.h>
diff --git a/poincare/src/equal.cpp b/poincare/src/equal.cpp
index 0f8c758fe..338ac935f 100644
--- a/poincare/src/equal.cpp
+++ b/poincare/src/equal.cpp
@@ -8,7 +8,7 @@
 #include <poincare/square_root.h>
 #include <poincare/subtraction.h>
 #include <poincare/symbol.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/serialization_helper.h>
 #include <poincare/horizontal_layout.h>
 #include <ion.h>
@@ -27,7 +27,7 @@ Expression EqualNode::shallowReduce(Context & context, Preferences::ComplexForma
 Layout EqualNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   HorizontalLayout result = HorizontalLayout::Builder();
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
-  result.addChildAtIndex(CharLayout::Builder('='), result.numberOfChildren(), result.numberOfChildren(), nullptr);
+  result.addChildAtIndex(CodePointLayout::Builder('='), result.numberOfChildren(), result.numberOfChildren(), nullptr);
   result.addOrMergeChildAtIndex(childAtIndex(1)->createLayout(floatDisplayMode, numberOfSignificantDigits), result.numberOfChildren(), false);
   return result;
 }
diff --git a/poincare/src/factorial.cpp b/poincare/src/factorial.cpp
index 643d24001..9c777a44a 100644
--- a/poincare/src/factorial.cpp
+++ b/poincare/src/factorial.cpp
@@ -1,6 +1,6 @@
 #include <poincare/factorial.h>
 #include <poincare/constant.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/rational.h>
 #include <poincare/undefined.h>
@@ -62,7 +62,7 @@ Layout FactorialNode::createLayout(Preferences::PrintFloatMode floatDisplayMode,
   HorizontalLayout result = HorizontalLayout::Builder();
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
   int childrenCount = result.numberOfChildren();
-  result.addChildAtIndex(CharLayout::Builder('!'), childrenCount, childrenCount, nullptr);
+  result.addChildAtIndex(CodePointLayout::Builder('!'), childrenCount, childrenCount, nullptr);
   return result;
 }
 
diff --git a/poincare/src/integral_layout.cpp b/poincare/src/integral_layout.cpp
index b53035fa6..907ee5c01 100644
--- a/poincare/src/integral_layout.cpp
+++ b/poincare/src/integral_layout.cpp
@@ -1,5 +1,5 @@
 #include <poincare/integral_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/serialization_helper.h>
 #include <string.h>
diff --git a/poincare/src/layout.cpp b/poincare/src/layout.cpp
index 103f5fa6d..d55906954 100644
--- a/poincare/src/layout.cpp
+++ b/poincare/src/layout.cpp
@@ -1,6 +1,6 @@
 #include <poincare/layout.h>
 #include <poincare/bracket_pair_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/empty_layout.h>
 #include <poincare/expression.h>
 #include <poincare/horizontal_layout.h>
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index 07b205b4c..a5f9346e5 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -1,5 +1,5 @@
 #include <poincare/layout_cursor.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/empty_layout.h>
 #include <poincare/fraction_layout.h>
 #include <poincare/horizontal_layout.h>
@@ -75,7 +75,7 @@ void LayoutCursor::move(MoveDirection direction, bool * shouldRecomputeLayout) {
 void LayoutCursor::addEmptyExponentialLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CharLayout::Builder(Ion::Charset::Exponential),
+      CodePointLayout::Builder(Ion::Charset::Exponential),
       VerticalOffsetLayout::Builder(emptyLayout, VerticalOffsetLayoutNode::Type::Superscript));
   m_layout.addSibling(this, sibling, false);
   m_layout = emptyLayout;
@@ -107,16 +107,16 @@ void LayoutCursor::addEmptyPowerLayout() {
 }
 
 void LayoutCursor::addEmptySquarePowerLayout() {
-  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(CharLayout::Builder('2'), VerticalOffsetLayoutNode::Type::Superscript);
+  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(CodePointLayout::Builder('2'), VerticalOffsetLayoutNode::Type::Superscript);
   privateAddEmptyPowerLayout(offsetLayout);
 }
 
 void LayoutCursor::addEmptyTenPowerLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CharLayout::Builder(Ion::Charset::MiddleDot),
-      CharLayout::Builder('1'),
-      CharLayout::Builder('0'),
+      CodePointLayout::Builder(Ion::Charset::MiddleDot),
+      CodePointLayout::Builder('1'),
+      CodePointLayout::Builder('0'),
       VerticalOffsetLayout::Builder(
         emptyLayout,
         VerticalOffsetLayoutNode::Type::Superscript));
@@ -132,8 +132,8 @@ void LayoutCursor::addFractionLayoutAndCollapseSiblings() {
   Layout(newChild.node()).collapseSiblings(this);
 }
 
-void LayoutCursor::addXNTCharLayout() {
-  m_layout.addSibling(this, CharLayout::Builder(m_layout.XNTChar()), true);
+void LayoutCursor::addXNTCodePointLayout() {
+  m_layout.addSibling(this, CodePointLayout::Builder(m_layout.XNTChar()), true);
 }
 
 void LayoutCursor::insertText(const char * text) {
@@ -148,7 +148,7 @@ void LayoutCursor::insertText(const char * text) {
       continue;
     }
     if (text[i] == Ion::Charset::MultiplicationSign) {
-      newChild = CharLayout::Builder(Ion::Charset::MiddleDot);
+      newChild = CodePointLayout::Builder(Ion::Charset::MiddleDot);
     } else if (text[i] == '(') {
       newChild = LeftParenthesisLayout::Builder();
       if (pointedChild.isUninitialized()) {
@@ -167,7 +167,7 @@ void LayoutCursor::insertText(const char * text) {
     }
 #endif
     else {
-      newChild = CharLayout::Builder(text[i]);
+      newChild = CodePointLayout::Builder(text[i]);
     }
     m_layout.addSibling(this, newChild, true);
   }
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index 7a61da0b8..d713ec1eb 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -1,5 +1,5 @@
 #include <poincare/layout_helper.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/left_parenthesis_layout.h>
 #include <poincare/right_parenthesis_layout.h>
@@ -34,7 +34,7 @@ Layout LayoutHelper::Prefix(const Expression & expression, Preferences::PrintFlo
   if (numberOfChildren > 0) {
     args.addOrMergeChildAtIndex(expression.childAtIndex(0).createLayout(floatDisplayMode, numberOfSignificantDigits), 0, true);
     for (int i = 1; i < numberOfChildren; i++) {
-      args.addChildAtIndex(CharLayout::Builder(','), args.numberOfChildren(), args.numberOfChildren(), nullptr);
+      args.addChildAtIndex(CodePointLayout::Builder(','), args.numberOfChildren(), args.numberOfChildren(), nullptr);
       args.addOrMergeChildAtIndex(expression.childAtIndex(i).createLayout(floatDisplayMode, numberOfSignificantDigits), args.numberOfChildren(), true);
     }
   }
@@ -57,7 +57,7 @@ HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const
   assert(bufferLen > 0);
   HorizontalLayout resultLayout = HorizontalLayout::Builder();
   for (int i = 0; i < bufferLen; i++) {
-    resultLayout.addChildAtIndex(CharLayout::Builder(buffer[i], font), i, i, nullptr);
+    resultLayout.addChildAtIndex(CodePointLayout::Builder(buffer[i], font), i, i, nullptr);
   }
   return resultLayout;
 }
diff --git a/poincare/src/opposite.cpp b/poincare/src/opposite.cpp
index ec4665c05..071f7b8c8 100644
--- a/poincare/src/opposite.cpp
+++ b/poincare/src/opposite.cpp
@@ -1,6 +1,6 @@
 #include <poincare/opposite.h>
 #include <poincare/addition.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/constant.h>
 #include <poincare/horizontal_layout.h>
 #include <cmath>
@@ -41,7 +41,7 @@ bool OppositeNode::childNeedsParenthesis(const TreeNode * child) const {
 }
 
 Layout OppositeNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  HorizontalLayout result = HorizontalLayout::Builder(CharLayout::Builder('-'));
+  HorizontalLayout result = HorizontalLayout::Builder(CodePointLayout::Builder('-'));
   if (childAtIndex(0)->type() == Type::Opposite) {
     result.addOrMergeChildAtIndex(LayoutHelper::Parentheses(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), false), 1, false);
   } else {
diff --git a/poincare/src/product_layout.cpp b/poincare/src/product_layout.cpp
index 8be05d651..70abbfb8f 100644
--- a/poincare/src/product_layout.cpp
+++ b/poincare/src/product_layout.cpp
@@ -1,5 +1,5 @@
 #include <poincare/product_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 
 namespace Poincare {
diff --git a/poincare/src/rational.cpp b/poincare/src/rational.cpp
index fa86aba96..3379dec01 100644
--- a/poincare/src/rational.cpp
+++ b/poincare/src/rational.cpp
@@ -9,7 +9,7 @@ extern "C" {
 #include <poincare/opposite.h>
 #include <poincare/infinity.h>
 #include <poincare/fraction_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 
 namespace Poincare {
 
diff --git a/poincare/src/sequence_layout.cpp b/poincare/src/sequence_layout.cpp
index b1c0e96eb..ed209b147 100644
--- a/poincare/src/sequence_layout.cpp
+++ b/poincare/src/sequence_layout.cpp
@@ -1,5 +1,5 @@
 #include <poincare/sequence_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/left_parenthesis_layout.h>
 #include <poincare/right_parenthesis_layout.h>
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index c255bd160..f66c02ec6 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -137,15 +137,15 @@ int SerializationHelper::Prefix(
   return numberOfChar;
 }
 
-int SerializationHelper::Char(char * buffer, int bufferSize, char charToWrite) {
+int SerializationHelper::Char(char * buffer, int bufferSize, char c) {
   if (bufferSize == 0) {
     return -1;
   }
-  buffer[bufferSize-1] = 0;
   if (bufferSize == 1) {
+    buffer[0] = 0;
     return 0;
   }
-  buffer[0] = charToWrite;
+  buffer[0] = c;
   buffer[1] = 0;
   return 1;
 }
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 0c085733d..76e646653 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -1,5 +1,5 @@
 #include <poincare/store.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/context.h>
 #include <poincare/complex.h>
 #include <poincare/horizontal_layout.h>
@@ -34,7 +34,7 @@ int StoreNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatM
 Layout StoreNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   HorizontalLayout result = HorizontalLayout::Builder();
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
-  result.addChildAtIndex(CharLayout::Builder(Ion::Charset::Sto), result.numberOfChildren(), result.numberOfChildren(), nullptr);
+  result.addChildAtIndex(CodePointLayout::Builder(Ion::Charset::Sto), result.numberOfChildren(), result.numberOfChildren(), nullptr);
   result.addOrMergeChildAtIndex(childAtIndex(1)->createLayout(floatDisplayMode, numberOfSignificantDigits), result.numberOfChildren(), false);
   return result;
 }
diff --git a/poincare/src/sum_layout.cpp b/poincare/src/sum_layout.cpp
index 9c9a079e8..1d7a60d74 100644
--- a/poincare/src/sum_layout.cpp
+++ b/poincare/src/sum_layout.cpp
@@ -1,5 +1,5 @@
 #include <poincare/sum_layout.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 
 namespace Poincare {
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 0428218eb..de844615a 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -1,5 +1,5 @@
 #include <poincare/symbol.h>
-#include <poincare/char_layout.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/context.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/layout_helper.h>
@@ -81,32 +81,32 @@ bool SymbolNode::isReal(Context & context) const {
 Layout SymbolNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   if (m_name[0] == Symbol::SpecialSymbols::UnknownX) {
     assert(m_name[1] == 0);
-    return CharLayout::Builder(Symbol::k_unknownXReadableChar);
+    return CodePointLayout::Builder(Symbol::k_unknownXReadableChar);
   }
   if (strcmp(m_name, "u(n)") == 0) {
     return HorizontalLayout::Builder(
-        CharLayout::Builder('u'),
+        CodePointLayout::Builder('u'),
         VerticalOffsetLayout::Builder(
-          CharLayout::Builder('n'),
+          CodePointLayout::Builder('n'),
           VerticalOffsetLayoutNode::Type::Subscript));
   }
   if (strcmp(m_name, "u(n+1)") == 0) {
     return HorizontalLayout::Builder(
-      CharLayout::Builder('u'),
+      CodePointLayout::Builder('u'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("n+1", 3),
         VerticalOffsetLayoutNode::Type::Subscript));
   }
   if (strcmp(m_name, "v(n)") == 0) {
     return HorizontalLayout::Builder(
-        CharLayout::Builder('v'),
+        CodePointLayout::Builder('v'),
         VerticalOffsetLayout::Builder(
-          CharLayout::Builder('n'),
+          CodePointLayout::Builder('n'),
           VerticalOffsetLayoutNode::Type::Subscript));
   }
   if (strcmp(m_name, "v(n+1)") == 0) {
     return HorizontalLayout::Builder(
-      CharLayout::Builder('v'),
+      CodePointLayout::Builder('v'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("n+1", 3),
           VerticalOffsetLayoutNode::Type::Subscript));
diff --git a/poincare/test/fraction_layout.cpp b/poincare/test/fraction_layout.cpp
index 51417ed3f..e17ec7cf6 100644
--- a/poincare/test/fraction_layout.cpp
+++ b/poincare/test/fraction_layout.cpp
@@ -41,11 +41,11 @@ QUIZ_CASE(poincare_fraction_layout_delete) {
    *     |3
    * */
   HorizontalLayout layout2 = HorizontalLayout::Builder(
-      CharLayout::Builder('1'),
-      CharLayout::Builder('+'),
+      CodePointLayout::Builder('1'),
+      CodePointLayout::Builder('+'),
       FractionLayout::Builder(
         EmptyLayout::Builder(),
-        CharLayout::Builder('3')
+        CodePointLayout::Builder('3')
       )
     );
   LayoutCursor cursor2(layout2.childAtIndex(2).childAtIndex(1), LayoutCursor::Position::Left);
@@ -56,7 +56,7 @@ QUIZ_CASE(poincare_fraction_layout_delete) {
 
 QUIZ_CASE(poincare_fraction_layout_serialize) {
   FractionLayout layout = FractionLayout::Builder(
-      CharLayout::Builder('1'),
+      CodePointLayout::Builder('1'),
       LayoutHelper::String("2+3", 3)
     );
   assert_expression_layout_serialize_to(layout, "(1)/(2+3)");
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index c8ee32a97..7e7172748 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -44,7 +44,7 @@ void assert_parsed_layout_is(Layout l, Poincare::Expression r) {
 QUIZ_CASE(poincare_create_all_layouts) {
   EmptyLayout e0 = EmptyLayout::Builder();
   AbsoluteValueLayout e1 = AbsoluteValueLayout::Builder(e0);
-  CharLayout e2 = CharLayout::Builder('a');
+  CodePointLayout e2 = CodePointLayout::Builder('a');
   BinomialCoefficientLayout e3 = BinomialCoefficientLayout::Builder(e1, e2);
   CeilingLayout e4 = CeilingLayout::Builder(e3);
   RightParenthesisLayout e5 = RightParenthesisLayout::Builder();
@@ -82,20 +82,20 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // 1+2
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('1'),
-      CharLayout::Builder('+'),
-      CharLayout::Builder('2'));
+      CodePointLayout::Builder('1'),
+      CodePointLayout::Builder('+'),
+      CodePointLayout::Builder('2'));
   e = Addition::Builder(Rational::Builder(1), Rational::Builder(2));
   assert_parsed_layout_is(l, e);
 
   // |3+3/6|
   l = AbsoluteValueLayout:: Builder(
       HorizontalLayout::Builder(
-        CharLayout::Builder('3'),
-        CharLayout::Builder('+'),
+        CodePointLayout::Builder('3'),
+        CodePointLayout::Builder('+'),
         FractionLayout::Builder(
-          CharLayout::Builder('3'),
-          CharLayout::Builder('6'))));
+          CodePointLayout::Builder('3'),
+          CodePointLayout::Builder('6'))));
   e = AbsoluteValue::Builder(
       Addition::Builder(
         Rational::Builder(3),
@@ -106,8 +106,8 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // binCoef(4,5)
   l = BinomialCoefficientLayout::Builder(
-      CharLayout::Builder('4'),
-      CharLayout::Builder('5'));
+      CodePointLayout::Builder('4'),
+      CodePointLayout::Builder('5'));
   e = BinomialCoefficient::Builder(
       Rational::Builder(4),
       Rational::Builder(5));
@@ -116,9 +116,9 @@ QUIZ_CASE(poincare_parse_layouts) {
   // ceil(4.6)
   l = CeilingLayout::Builder(
       HorizontalLayout::Builder(
-        CharLayout::Builder('4'),
-        CharLayout::Builder('.'),
-        CharLayout::Builder('6')));
+        CodePointLayout::Builder('4'),
+        CodePointLayout::Builder('.'),
+        CodePointLayout::Builder('6')));
   e = Ceiling::Builder(
       Decimal::Builder(4.6));
   assert_parsed_layout_is(l, e);
@@ -126,21 +126,21 @@ QUIZ_CASE(poincare_parse_layouts) {
   // floor(7.2)
   l = FloorLayout::Builder(
       HorizontalLayout::Builder(
-        CharLayout::Builder('7'),
-        CharLayout::Builder('.'),
-        CharLayout::Builder('2')));
+        CodePointLayout::Builder('7'),
+        CodePointLayout::Builder('.'),
+        CodePointLayout::Builder('2')));
   e = Floor::Builder(
       Decimal::Builder(7.2));
   assert_parsed_layout_is(l, e);
 
   // 2^(3+4)
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('2'),
+      CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
         HorizontalLayout::Builder(
-          CharLayout::Builder('3'),
-          CharLayout::Builder('+'),
-          CharLayout::Builder('4')),
+          CodePointLayout::Builder('3'),
+          CodePointLayout::Builder('+'),
+          CodePointLayout::Builder('4')),
         VerticalOffsetLayoutNode::Type::Superscript));
   e = Power::Builder(
       Rational::Builder(2),
@@ -151,12 +151,12 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // log_3(2)
   HorizontalLayout l1 = HorizontalLayout::Builder();
-  l1.addChildAtIndex(CharLayout::Builder('l'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
-  l1.addChildAtIndex(CharLayout::Builder('o'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
-  l1.addChildAtIndex(CharLayout::Builder('g'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
-  l1.addChildAtIndex(VerticalOffsetLayout::Builder(CharLayout::Builder('3'), VerticalOffsetLayoutNode::Type::Subscript), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(CodePointLayout::Builder('l'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(CodePointLayout::Builder('o'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(CodePointLayout::Builder('g'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(VerticalOffsetLayout::Builder(CodePointLayout::Builder('3'), VerticalOffsetLayoutNode::Type::Subscript), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(LeftParenthesisLayout::Builder(), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
-  l1.addChildAtIndex(CharLayout::Builder('2'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(CodePointLayout::Builder('2'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(RightParenthesisLayout::Builder(), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l = l1;
   e = Logarithm::Builder(
@@ -166,17 +166,17 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // root(5,3)
   l = NthRootLayout::Builder(
-      CharLayout::Builder('5'),
-      CharLayout::Builder('3'));
+      CodePointLayout::Builder('5'),
+      CodePointLayout::Builder('3'));
   e = NthRoot::Builder(Rational::Builder(5), Rational::Builder(3));
   assert_parsed_layout_is(l, e);
 
   // int(7, x, 4, 5)
   l = IntegralLayout::Builder(
-      CharLayout::Builder('7'),
-      CharLayout::Builder('x'),
-      CharLayout::Builder('4'),
-      CharLayout::Builder('5'));
+      CodePointLayout::Builder('7'),
+      CodePointLayout::Builder('x'),
+      CodePointLayout::Builder('4'),
+      CodePointLayout::Builder('5'));
   e = Integral::Builder(
       Rational::Builder(7),
       Symbol::Builder('x'),
@@ -186,11 +186,11 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // 2^2 !
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('2'),
+      CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
-        CharLayout::Builder('2'),
+        CodePointLayout::Builder('2'),
         VerticalOffsetLayoutNode::Type::Superscript),
-      CharLayout::Builder('!'));
+      CodePointLayout::Builder('!'));
   e = Factorial::Builder(
       Power::Builder(
         Rational::Builder(2),
@@ -199,14 +199,14 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // 5* 6/(7+5) *3
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('5'),
+      CodePointLayout::Builder('5'),
       FractionLayout::Builder(
-        CharLayout::Builder('6'),
+        CodePointLayout::Builder('6'),
         HorizontalLayout::Builder(
-          CharLayout::Builder('7'),
-          CharLayout::Builder('+'),
-          CharLayout::Builder('5'))),
-      CharLayout::Builder('3'));
+          CodePointLayout::Builder('7'),
+          CodePointLayout::Builder('+'),
+          CodePointLayout::Builder('5'))),
+      CodePointLayout::Builder('3'));
   e = Multiplication::Builder(
       Rational::Builder(5),
       Division::Builder(
@@ -220,14 +220,14 @@ QUIZ_CASE(poincare_parse_layouts) {
   // [[3^2!, 7][4,5]
   l = MatrixLayout::Builder(
       HorizontalLayout::Builder(
-        CharLayout::Builder('3'),
+        CodePointLayout::Builder('3'),
         VerticalOffsetLayout::Builder(
-          CharLayout::Builder('2'),
+          CodePointLayout::Builder('2'),
           VerticalOffsetLayoutNode::Type::Superscript),
-        CharLayout::Builder('!')),
-      CharLayout::Builder('7'),
-      CharLayout::Builder('4'),
-      CharLayout::Builder('5'));
+        CodePointLayout::Builder('!')),
+      CodePointLayout::Builder('7'),
+      CodePointLayout::Builder('4'),
+      CodePointLayout::Builder('5'));
   Matrix m = BuildOneChildMatrix(
       Factorial::Builder(
         Power::Builder(
@@ -242,15 +242,15 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // 2^det([[3!, 7][4,5])
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('2'),
+      CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
         MatrixLayout::Builder(
           HorizontalLayout::Builder(
-            CharLayout::Builder('3'),
-            CharLayout::Builder('!')),
-          CharLayout::Builder('7'),
-          CharLayout::Builder('4'),
-          CharLayout::Builder('5')),
+            CodePointLayout::Builder('3'),
+            CodePointLayout::Builder('!')),
+          CodePointLayout::Builder('7'),
+          CodePointLayout::Builder('4'),
+          CodePointLayout::Builder('5')),
         VerticalOffsetLayoutNode::Type::Superscript));
   m = BuildOneChildMatrix(
       Factorial::Builder(
@@ -264,10 +264,10 @@ QUIZ_CASE(poincare_parse_layouts) {
 
   // 2e^3
   l = HorizontalLayout::Builder(
-      CharLayout::Builder('2'),
-      CharLayout::Builder(Ion::Charset::Exponential),
+      CodePointLayout::Builder('2'),
+      CodePointLayout::Builder(Ion::Charset::Exponential),
       VerticalOffsetLayout::Builder(
-        CharLayout::Builder('3'),
+        CodePointLayout::Builder('3'),
         VerticalOffsetLayoutNode::Type::Superscript));
   e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(Ion::Charset::Exponential),Parenthesis::Builder(Rational::Builder(3))));
   assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(Ion::Charset::Exponential),Parenthesis::Builder(Rational::Builder(3)))));
diff --git a/poincare/test/parentheses_layout.cpp b/poincare/test/parentheses_layout.cpp
index 1cb82c0d3..241ac6f02 100644
--- a/poincare/test/parentheses_layout.cpp
+++ b/poincare/test/parentheses_layout.cpp
@@ -16,16 +16,16 @@ QUIZ_CASE(poincare_parenthesis_layout_size) {
   LeftParenthesisLayout leftPar = LeftParenthesisLayout::Builder();
   RightParenthesisLayout rightPar = RightParenthesisLayout::Builder();
   layout.addChildAtIndex(leftPar, 0, 0, nullptr);
-  layout.addChildAtIndex(CharLayout::Builder('2'), 1, 1, nullptr);
-  layout.addChildAtIndex(CharLayout::Builder('+'), 2, 2, nullptr);
+  layout.addChildAtIndex(CodePointLayout::Builder('2'), 1, 1, nullptr);
+  layout.addChildAtIndex(CodePointLayout::Builder('+'), 2, 2, nullptr);
   layout.addChildAtIndex(LeftParenthesisLayout::Builder(), 3, 3, nullptr);
   layout.addChildAtIndex(FractionLayout::Builder(
-        CharLayout::Builder('3'),
-        CharLayout::Builder('4')),
+        CodePointLayout::Builder('3'),
+        CodePointLayout::Builder('4')),
       4, 4, nullptr);
   layout.addChildAtIndex(RightParenthesisLayout::Builder(), 4, 4, nullptr);
-  layout.addChildAtIndex(CharLayout::Builder('6'), 5, 5, nullptr);
+  layout.addChildAtIndex(CodePointLayout::Builder('6'), 5, 5, nullptr);
   layout.addChildAtIndex(rightPar, 7, 7, nullptr);
-  layout.addChildAtIndex(CharLayout::Builder('1'), 8, 8, nullptr);
+  layout.addChildAtIndex(CodePointLayout::Builder('1'), 8, 8, nullptr);
   quiz_assert(leftPar.layoutSize().height() == rightPar.layoutSize().height());
 }
diff --git a/poincare/test/vertical_offset_layout.cpp b/poincare/test/vertical_offset_layout.cpp
index 4c4e71750..72bc3ae09 100644
--- a/poincare/test/vertical_offset_layout.cpp
+++ b/poincare/test/vertical_offset_layout.cpp
@@ -8,7 +8,7 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_vertical_offset_layout_serialize) {
   HorizontalLayout layout = HorizontalLayout::Builder(
-    CharLayout::Builder('2'),
+    CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("x+5", 3),
         VerticalOffsetLayoutNode::Type::Superscript

From 65e5adafac519f6f35b4725149e998eb61acfd03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 11 Jan 2019 17:37:23 +0100
Subject: [PATCH 023/295] Remove Ion::Charset

---
 apps/calculation/test/calculation_store.cpp   |  13 +-
 apps/code/helpers.cpp                         |  15 +--
 apps/code/script_node_cell.h                  |   5 +-
 .../graph/graph/integral_graph_controller.cpp |   2 +-
 apps/regression/graph_controller.cpp          |   4 +-
 apps/regression/model/cubic_model.cpp         |   6 +-
 apps/regression/model/exponential_model.cpp   |   4 +-
 apps/regression/model/linear_model.cpp        |   2 +-
 apps/regression/model/logarithmic_model.cpp   |   2 +-
 apps/regression/model/logistic_model.cpp      |   4 +-
 apps/regression/model/power_model.cpp         |   2 +-
 apps/regression/model/quadratic_model.cpp     |   4 +-
 apps/regression/model/quartic_model.cpp       |   8 +-
 apps/regression/model/trigonometric_model.cpp |   4 +-
 apps/sequence/graph/term_sum_controller.cpp   |   2 +-
 .../sub_menu/preferences_controller.cpp       |  22 ++--
 apps/shared/storage_sum_graph_controller.cpp  |  15 +--
 apps/shared/storage_sum_graph_controller.h    |   6 +-
 apps/shared/sum_graph_controller.cpp          |  15 +--
 apps/shared/sum_graph_controller.h            |   6 +-
 apps/shared/text_field_delegate_app.cpp       |  10 +-
 apps/shared/toolbox_helpers.cpp               |   4 +-
 apps/solver/equation.cpp                      |   2 +-
 apps/solver/equation_store.cpp                |   2 +-
 apps/solver/solutions_controller.cpp          |   2 +-
 apps/solver/test/equation_store.cpp           |  14 +--
 apps/variable_box_controller.cpp              |   2 +-
 apps/variable_box_empty_controller.cpp        |   8 +-
 escher/include/escher/editable_field.h        |   3 +-
 escher/include/escher/layout_field.h          |   2 +-
 escher/include/escher/text_field.h            |   2 +-
 escher/src/layout_field.cpp                   |   8 +-
 escher/src/text_area.cpp                      |   3 +-
 escher/src/text_field.cpp                     |  12 +-
 escher/src/text_input_helpers.cpp             |   6 +-
 ion/include/ion.h                             |   1 -
 ion/include/ion/charset.h                     |  37 ------
 ion/src/shared/events.cpp                     |  34 ++----
 .../include/kandinsky/unicode/code_point.h    |  44 +++++--
 .../include/kandinsky/unicode/utf8_decoder.h  |   1 +
 kandinsky/src/unicode/utf8_decoder.cpp        |   8 +-
 poincare/include/poincare/code_point_layout.h |   2 +-
 poincare/include/poincare/constant.h          |  14 ++-
 poincare/include/poincare/integral_layout.h   |   2 +-
 poincare/include/poincare/layout.h            |   2 +-
 poincare/include/poincare/layout_helper.h     |   1 +
 poincare/include/poincare/layout_node.h       |   5 +-
 poincare/include/poincare/print_float.h       |   2 +-
 poincare/include/poincare/sequence_layout.h   |   2 +-
 .../include/poincare/serialization_helper.h   |   1 +
 poincare/include/poincare/square_root.h       |   8 +-
 poincare/include/poincare/symbol.h            |   2 +-
 .../poincare/trigonometry_cheat_table.h       |   2 +-
 poincare/src/complex_argument.cpp             |   2 +-
 poincare/src/complex_cartesian.cpp            |   6 +-
 poincare/src/constant.cpp                     |  40 +++++--
 poincare/src/decimal.cpp                      |   4 +-
 poincare/src/empty_expression.cpp             |   3 +-
 poincare/src/expression.cpp                   |  17 +--
 poincare/src/expression_debug.cpp             |  10 +-
 poincare/src/fraction_layout.cpp              |   5 +-
 poincare/src/layout_cursor.cpp                |  18 +--
 poincare/src/layout_helper.cpp                |  10 ++
 poincare/src/logarithm.cpp                    |   2 +-
 poincare/src/multiplication.cpp               |  12 +-
 poincare/src/naperian_logarithm.cpp           |   2 +-
 poincare/src/nth_root_layout.cpp              |   3 +-
 poincare/src/parsing/tokenizer.cpp            | 112 +++++++++---------
 poincare/src/parsing/tokenizer.h              |  10 +-
 poincare/src/power.cpp                        |  12 +-
 poincare/src/print_float.cpp                  |  36 +++---
 poincare/src/serialization_helper.cpp         |   9 +-
 poincare/src/store.cpp                        |   7 +-
 poincare/src/trigonometry.cpp                 |  46 +++----
 poincare/src/trigonometry_cheat_table.cpp     |  74 ++++++------
 poincare/src/vertical_offset_layout.cpp       |   7 +-
 poincare/test/convert_expression_to_text.cpp  |   2 -
 poincare/test/expression_order.cpp            |  14 +--
 poincare/test/float.cpp                       |   1 -
 poincare/test/helper.cpp                      |  37 ++----
 poincare/test/helper.h                        |   2 -
 poincare/test/layouts.cpp                     |   6 +-
 poincare/test/parser.cpp                      |  25 ++--
 83 files changed, 453 insertions(+), 470 deletions(-)
 delete mode 100644 ion/include/ion/charset.h

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 151d6254a..c64fdd9ac 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -70,10 +70,7 @@ QUIZ_CASE(calculation_ans) {
 }
 
 void assertCalculationDisplay(const char * input, bool displayExactOutput, bool displayApproximateOutput, ::Calculation::Calculation::EqualSign sign, const char * exactOutput, const char * approximateOutput, Context * context, CalculationStore * store) {
-  char buffer[500];
-  strlcpy(buffer, input, sizeof(buffer));
-  translate_in_special_chars(buffer);
-  store->push(buffer, context);
+  store->push(input, context);
   ::Calculation::Calculation * lastCalculation = store->calculationAtIndex(1);
   quiz_assert(lastCalculation->shouldOnlyDisplayExactOutput() == displayExactOutput);
   quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(context) == displayApproximateOutput);
@@ -81,14 +78,10 @@ void assertCalculationDisplay(const char * input, bool displayExactOutput, bool
     quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(context) == sign);
   }
   if (exactOutput) {
-    strlcpy(buffer, exactOutput, sizeof(buffer));
-    translate_in_special_chars(buffer);
-    quiz_assert(strcmp(lastCalculation->exactOutputText(), buffer) == 0);
+    quiz_assert(strcmp(lastCalculation->exactOutputText(), exactOutput) == 0);
   }
   if (approximateOutput) {
-    strlcpy(buffer, approximateOutput, sizeof(buffer));
-    translate_in_special_chars(buffer);
-    quiz_assert(strcmp(lastCalculation->approximateOutputText(),buffer) == 0);
+    quiz_assert(strcmp(lastCalculation->approximateOutputText(), approximateOutput) == 0);
   }
   store->deleteAll();
 }
diff --git a/apps/code/helpers.cpp b/apps/code/helpers.cpp
index 12582729c..8a9735de4 100644
--- a/apps/code/helpers.cpp
+++ b/apps/code/helpers.cpp
@@ -1,5 +1,6 @@
 #include "helpers.h"
 #include <string.h>
+#include <kandinsky/unicode/code_point.h>
 #include <ion.h>
 
 namespace Code {
@@ -15,20 +16,16 @@ private:
   const char * m_text;
 };
 
-static constexpr const char k_exponential[7] = {'e', 'x', 'p', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_logarithm[7] = {'l', 'o', 'g', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_logarithm10[9] = {'l', 'o', 'g', '1', '0', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_sqrt[8] = {'s', 'q', 'r', 't', '(', Ion::Charset::Empty, ')', 0};
-
+static_assert('\x11' == KDCodePointEmpty, "Unicode error");
 static constexpr EventTextPair sEventTextMap[] = {
   EventTextPair(Ion::Events::XNT, "x"),
-  EventTextPair(Ion::Events::Exp, k_exponential),
-  EventTextPair(Ion::Events::Ln, k_logarithm),
-  EventTextPair(Ion::Events::Log, k_logarithm10),
+  EventTextPair(Ion::Events::Exp, "exp(\x11)"),
+  EventTextPair(Ion::Events::Ln, "log(\x11)"),
+  EventTextPair(Ion::Events::Log, "log10(\x11)"),
   EventTextPair(Ion::Events::Imaginary, "1j"),
   EventTextPair(Ion::Events::Power, "**"),
   EventTextPair(Ion::Events::Pi, "pi"),
-  EventTextPair(Ion::Events::Sqrt, k_sqrt),
+  EventTextPair(Ion::Events::Sqrt, "sqrt(\x11)"),
   EventTextPair(Ion::Events::Square, "**2"),
   EventTextPair(Ion::Events::Multiplication, "*"),
   EventTextPair(Ion::Events::EE, "e"),
diff --git a/apps/code/script_node_cell.h b/apps/code/script_node_cell.h
index ae1c252ba..29e9f8bbf 100644
--- a/apps/code/script_node_cell.h
+++ b/apps/code/script_node_cell.h
@@ -4,7 +4,6 @@
 #include "script_node.h"
 #include "script_store.h"
 #include <escher/table_cell.h>
-#include <ion/charset.h>
 #include <kandinsky/coordinate.h>
 
 namespace Code {
@@ -23,8 +22,10 @@ public:
   void reloadCell() override;
   const char * text() const override { return m_scriptNodeView.text(); }
 
+  static_assert('\x11' == KDCodePointEmpty, "Unicode error");
   constexpr static char k_parentheses[] = "()";
-  constexpr static char k_parenthesesWithEmpty[] = {'(', Ion::Charset::Empty, ')', 0};
+  constexpr static char k_parenthesesWithEmpty[] = "(\x11)";
+
 protected:
   class ScriptNodeView : public HighlightCell {
   public:
diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index a2ff51402..6dc3fe6bd 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -13,7 +13,7 @@ using namespace Poincare;
 namespace Graph {
 
 IntegralGraphController::IntegralGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, Ion::Charset::Integral)
+  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, KDCodePointIntegral)
 {
 }
 
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index be3298f72..3d8a8a807 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -121,7 +121,7 @@ void GraphController::reloadBannerView() {
   double x = m_cursor->x();
   // Display a specific legend if the mean dot is selected
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    constexpr static char legX[] = {Ion::Charset::XBar, '=', 0};
+    constexpr static char legX[] = {'X'/*TODO LEA Ion::Charset::XBar*/, '=', 0};
     legend = legX;
     x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   }
@@ -138,7 +138,7 @@ void GraphController::reloadBannerView() {
   legend = "y=";
   double y = m_cursor->y();
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    constexpr static char legY[] = {Ion::Charset::YBar, '=', 0};
+    constexpr static char legY[] = {'Y' /*TODO LEA Ion::Charset::YBar*/, '=', 0};
     legend = legY;
     y = m_store->meanOfColumn(*m_selectedSeriesIndex, 1);
   }
diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index 39cf2139b..e8bbc5734 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -21,7 +21,7 @@ Layout CubicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout CubicModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -37,7 +37,7 @@ Layout CubicModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('d', KDFont::SmallFont),
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index 4b2c3fa5d..a5f5b937f 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -13,12 +13,12 @@ Layout ExponentialModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(
             CodePointLayout::Builder('b', KDFont::SmallFont),
-            CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+            CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
             CodePointLayout::Builder('X', KDFont::SmallFont)
           ),
           VerticalOffsetLayoutNode::Type::Superscript
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index 116126fc5..15b811181 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -13,7 +13,7 @@ Layout LinearModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
diff --git a/apps/regression/model/logarithmic_model.cpp b/apps/regression/model/logarithmic_model.cpp
index 255ef5268..c0402bac9 100644
--- a/apps/regression/model/logarithmic_model.cpp
+++ b/apps/regression/model/logarithmic_model.cpp
@@ -13,7 +13,7 @@ Layout LogarithmicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('l', KDFont::SmallFont),
       CodePointLayout::Builder('n', KDFont::SmallFont),
       CodePointLayout::Builder('(', KDFont::SmallFont),
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index 5f637e798..f7744f916 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -15,14 +15,14 @@ Layout LogisticModel::layout() {
     Layout exponentLayoutChildren[] = {
       CodePointLayout::Builder('-', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont)
     };
     Layout layoutChildren[] = {
       CodePointLayout::Builder('1', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(exponentLayoutChildren, 4),
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index 7a5dcc992..2241eb4fa 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -14,7 +14,7 @@ Layout PowerModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('b', KDFont::SmallFont),
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index 16d9fd6c9..feaf176e6 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -21,7 +21,7 @@ Layout QuadraticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout QuadraticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 163880fae..710bb970a 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -21,7 +21,7 @@ Layout QuarticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('4', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', KDFont::SmallFont),
@@ -37,7 +37,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -45,7 +45,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('d', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
diff --git a/apps/regression/model/trigonometric_model.cpp b/apps/regression/model/trigonometric_model.cpp
index 8fceb306f..46ba81386 100644
--- a/apps/regression/model/trigonometric_model.cpp
+++ b/apps/regression/model/trigonometric_model.cpp
@@ -22,13 +22,13 @@ Layout TrigonometricModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('s', KDFont::SmallFont),
       CodePointLayout::Builder('i', KDFont::SmallFont),
       CodePointLayout::Builder('n', KDFont::SmallFont),
       CodePointLayout::Builder('(', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(Ion::Charset::MiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 17b59c943..aa636e422 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -18,7 +18,7 @@ using namespace Poincare;
 namespace Sequence {
 
 TermSumController::TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
-  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, Ion::Charset::CapitalSigma)
+  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, KDCodePointNArySummation)
 {
 }
 
diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index 65baa91eb..a20c3b45f 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -54,12 +54,12 @@ Layout layoutForPreferences(I18n::Message message) {
     // Angle Unit
     case I18n::Message::Degres:
     {
-      const char degEx[] = {'9', '0', Ion::Charset::Degree};
-      return LayoutHelper::String(degEx, sizeof(degEx), KDFont::SmallFont);
+      const char * degEx = "90°";
+      return LayoutHelper::String("90°", strlen(degEx), KDFont::SmallFont);
     }
     case I18n::Message::Radian:
     {
-      const char pi[] = {Ion::Charset::SmallPi};
+      const char * pi = "π";
       return FractionLayout::Builder(
           LayoutHelper::String(pi, sizeof(pi), KDFont::SmallFont),
           LayoutHelper::String("2", 1, KDFont::SmallFont)
@@ -70,8 +70,8 @@ Layout layoutForPreferences(I18n::Message message) {
       return LayoutHelper::String("12.34", 5, KDFont::SmallFont);
     case I18n::Message::Scientific:
     {
-      const char text[] = {'1','.', '2', '3', '4', Ion::Charset::Exponent, '1'};
-      return LayoutHelper::String(text, sizeof(text), KDFont::SmallFont);
+      const char * text = "1.234ᴇ1";
+      return LayoutHelper::String(text, strlen(text), KDFont::SmallFont);
     }
     // Edition mode
     case I18n::Message::Edition2D:
@@ -88,16 +88,16 @@ Layout layoutForPreferences(I18n::Message message) {
     }
     case I18n::Message::Cartesian:
     {
-      const char text[] = {'a','+', Ion::Charset::IComplex, 'b'};
-      return LayoutHelper::String(text, sizeof(text), KDFont::SmallFont);
+      const char * text = "a+𝐢b";
+      return LayoutHelper::String(text, strlen(text), KDFont::SmallFont);
     }
     case I18n::Message::Polar:
     {
-      const char base[] = {'r', Ion::Charset::Exponential};
-      const char superscript[] = {Ion::Charset::IComplex, Ion::Charset::SmallTheta};
+      const char * base = "rℯ";
+      const char * superscript = "𝐢θ";
       return HorizontalLayout::Builder(
-          LayoutHelper::String(base, sizeof(base), KDFont::SmallFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, sizeof(superscript), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript)
+          LayoutHelper::String(base, strlen(base), KDFont::SmallFont),
+          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, strlen(superscript), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript)
         );
     }
     default:
diff --git a/apps/shared/storage_sum_graph_controller.cpp b/apps/shared/storage_sum_graph_controller.cpp
index bc164fb5a..7582995f6 100644
--- a/apps/shared/storage_sum_graph_controller.cpp
+++ b/apps/shared/storage_sum_graph_controller.cpp
@@ -13,7 +13,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageSumGraphController::StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, char sumSymbol) :
+StorageSumGraphController::StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
   SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
   m_step(Step::FirstParameter),
   m_startSum(NAN),
@@ -203,7 +203,7 @@ bool StorageSumGraphController::handleEnter() {
 
 /* Legend View */
 
-StorageSumGraphController::LegendView::LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, char sumSymbol) :
+StorageSumGraphController::LegendView::LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
   m_sum(0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_sumLayout(),
   m_legend(k_font, I18n::Message::Default, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
@@ -234,25 +234,26 @@ void StorageSumGraphController::LegendView::setEditableZone(double d) {
 
 void StorageSumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
-  const char sigma[] = {' ', m_sumSymbol};
+  constexpr int sigmaLength = 2;
+  const CodePoint sigma[sigmaLength] = {KDCodePointSpace, m_sumSymbol};
   if (step == Step::FirstParameter) {
-    m_sumLayout = LayoutHelper::String(sigma, sizeof(sigma));
+    m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaLength);
   } else if (step == Step::SecondParameter) {
     char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::String(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
         LayoutHelper::String(buffer, strlen(buffer), k_font),
         EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, k_font, false));
   } else {
-    m_sumLayout = LayoutHelper::String(sigma, sizeof(sigma));
+    m_sumLayout = LayoutHelper::CodePointString(sigma, sizeof(sigma));
     char buffer[2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout start = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
     PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout end = LayoutHelper::String(buffer, strlen(buffer), k_font);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::String(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
         start,
         end);
     strlcpy(buffer, "= ", 3);
diff --git a/apps/shared/storage_sum_graph_controller.h b/apps/shared/storage_sum_graph_controller.h
index 0f5189133..7b9aceecc 100644
--- a/apps/shared/storage_sum_graph_controller.h
+++ b/apps/shared/storage_sum_graph_controller.h
@@ -15,7 +15,7 @@ namespace Shared {
 
 class StorageSumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
 public:
-  StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, char sumSymbol);
+  StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
   void viewWillAppear() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
   bool handleEvent(Ion::Events::Event event) override;
@@ -49,7 +49,7 @@ private:
   bool handleEnter() override;
   class LegendView : public View {
   public:
-    LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, char sumSymbol);
+    LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
     LegendView(const LegendView& other) = delete;
     LegendView(LegendView&& other) = delete;
     LegendView& operator=(const LegendView& other) = delete;
@@ -76,7 +76,7 @@ private:
     MessageTextView m_legend;
     TextField m_editableZone;
     char m_draftText[TextField::maxBufferSize()];
-    char m_sumSymbol;
+    CodePoint m_sumSymbol;
   };
   StorageFunctionGraphView * m_graphView;
   LegendView m_legendView;
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index ee03dbc2b..e45984d5b 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -13,7 +13,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-SumGraphController::SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, char sumSymbol) :
+SumGraphController::SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
   SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
   m_step(Step::FirstParameter),
   m_startSum(NAN),
@@ -202,7 +202,7 @@ bool SumGraphController::handleEnter() {
 
 /* Legend View */
 
-SumGraphController::LegendView::LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, char sumSymbol) :
+SumGraphController::LegendView::LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
   m_sum(0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_sumLayout(),
   m_legend(KDFont::SmallFont, I18n::Message::Default, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
@@ -233,18 +233,19 @@ void SumGraphController::LegendView::setEditableZone(double d) {
 
 void SumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
-  const char sigma[] = {' ', m_sumSymbol};
+  constexpr int sigmaSize = 2;
+  const CodePoint sigma[sigmaSize] = {KDCodePointSpace, m_sumSymbol};
   if (step == Step::FirstParameter) {
-    m_sumLayout = LayoutHelper::String(sigma, sizeof(sigma));
+    m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaSize);
   } else if (step == Step::SecondParameter) {
     char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::String(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
         LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont),
         EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, KDFont::SmallFont, false));
   } else {
-    m_sumLayout = LayoutHelper::String(sigma, sizeof(sigma));
+    m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaSize);
     constexpr size_t bufferSize = 2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
     char buffer[bufferSize];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
@@ -252,7 +253,7 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
     PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout end = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::String(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
         start,
         end);
     strlcpy(buffer, "= ", bufferSize);
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 9def6e084..595f9f4bc 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -14,7 +14,7 @@ namespace Shared {
 
 class SumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
 public:
-  SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, char sumSymbol);
+  SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
   void viewWillAppear() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
   bool handleEvent(Ion::Events::Event event) override;
@@ -48,7 +48,7 @@ private:
   bool handleEnter() override;
   class LegendView : public View {
   public:
-    LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, char sumSymbol);
+    LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
     LegendView(const LegendView& other) = delete;
     LegendView(LegendView&& other) = delete;
     LegendView& operator=(const LegendView& other) = delete;
@@ -72,7 +72,7 @@ private:
     MessageTextView m_legend;
     TextField m_editableZone;
     char m_draftText[TextField::maxBufferSize()];
-    char m_sumSymbol;
+    CodePoint m_sumSymbol;
   };
   FunctionGraphView * m_graphView;
   LegendView m_legendView;
diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index b9062c352..94aacf698 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -1,4 +1,5 @@
 #include "text_field_delegate_app.h"
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <apps/apps_container.h>
 #include <apps/constant.h>
 #include <apps/shared/poincare_helpers.h>
@@ -53,8 +54,13 @@ bool TextFieldDelegateApp::fieldDidReceiveEvent(EditableField * field, Responder
     if (!field->isEditing()) {
       field->setEditing(true);
     }
-    const char xnt[2] = {field->XNTChar(XNT()), 0};
-    return field->handleEventWithText(xnt);
+    /* TODO decode here to encode again in handleEventWithText? */
+    constexpr int bufferSize = CodePoint::MaxCodePointCharLength+1;
+    char buffer[bufferSize];
+    size_t length = UTF8Decoder::CodePointToChars(XNT(), buffer, bufferSize);
+    assert(length < bufferSize - 1);
+    buffer[length] = 0;
+    return field->handleEventWithText(buffer);
   }
   return false;
 }
diff --git a/apps/shared/toolbox_helpers.cpp b/apps/shared/toolbox_helpers.cpp
index 0a0e50035..99c89cd3b 100644
--- a/apps/shared/toolbox_helpers.cpp
+++ b/apps/shared/toolbox_helpers.cpp
@@ -1,5 +1,4 @@
 #include "toolbox_helpers.h"
-#include <ion/charset.h>
 #include <apps/i18n.h>
 #include <string.h>
 #include <assert.h>
@@ -8,6 +7,7 @@ namespace Shared {
 namespace ToolboxHelpers {
 
 int CursorIndexInCommandText(const char * text) {
+  // TODO LEA
   size_t textLength = strlen(text);
   for (size_t i = 0; i < textLength; i++) {
     if (text[i] == '(' || text[i] == '\'') {
@@ -49,7 +49,7 @@ void TextToInsertForCommandText(const char * command, char * buffer, int bufferS
       buffer[currentNewTextIndex++] = command[i];
     } else {
       if (replaceArgsWithEmptyChar && !argumentAlreadyReplaced) {
-        buffer[currentNewTextIndex++] = Ion::Charset::Empty;
+        // TODO LEA buffer[currentNewTextIndex++] = Ion::Charset::Empty;
         argumentAlreadyReplaced = true;
       }
     }
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 15c9e1578..04edc3eb8 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -50,7 +50,7 @@ Expression Equation::standardForm(Context * context) const {
 }
 
 bool Equation::containsIComplex() const {
-  return strchr(text(), Ion::Charset::IComplex) != nullptr;
+  return false; //TODO LEA strchr(text(), KDCodePointMathematicalBoldSmallI) != nullptr;
 }
 
 void Equation::tidyStandardForm() {
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index b81de3552..c629302a3 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -325,7 +325,7 @@ EquationStore::Error EquationStore::oneDimensialPolynomialSolve(Expression exact
       // C = Root((delta1+sqrt(-27a^2*delta))/2, 3)
       Expression * mult11Operands[3] = {new Rational::Builder(-27), new Power::Builder(a->clone(), new Rational::Builder(2), false), (*delta)->clone()};
       Expression * c = new Power::Builder(new Division::Builder(new Addition(delta1, new SquareRoot(new Multiplication::Builder(mult11Operands, 3, false), false), false), new Rational::Builder(2), false), new Rational::Builder(1,3), false);
-      Expression * unary3roots[2] = {new Addition(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(Ion::Charset::IComplex), false), new Rational::Builder(2), false), false), new Subtraction::Builder(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(Ion::Charset::IComplex), false), new Rational::Builder(2), false), false)};
+      Expression * unary3roots[2] = {new Addition(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(KDCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false), new Subtraction::Builder(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(KDCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false)};
       // x_k = -1/(3a)*(b+C*z+delta0/(zC)) with z = unary cube root
       for (int k = 0; k < 3; k++) {
         Expression * ccopy = c;
diff --git a/apps/solver/solutions_controller.cpp b/apps/solver/solutions_controller.cpp
index 1f01562a7..c3b9ae56a 100644
--- a/apps/solver/solutions_controller.cpp
+++ b/apps/solver/solutions_controller.cpp
@@ -76,7 +76,7 @@ SolutionsController::SolutionsController(Responder * parentResponder, EquationSt
   m_contentView(this)
 {
   m_delta2Layout = HorizontalLayout::Builder(VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript), LayoutHelper::String("-4ac", 4, KDFont::SmallFont));
-  char deltaB[] = {Ion::Charset::CapitalDelta, '=', 'b'};
+  const char * deltaB = "Δ=b";
   static_cast<HorizontalLayout&>(m_delta2Layout).addOrMergeChildAtIndex(LayoutHelper::String(deltaB, 3, KDFont::SmallFont), 0, false);
   for (int i = 0; i < EquationStore::k_maxNumberOfExactSolutions; i++) {
     m_exactValueCells[i].setParentResponder(m_contentView.selectableTableView());
diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index fd2e3e9c5..2053defb6 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -12,15 +12,12 @@ using namespace Poincare;
 namespace Solver {
 
 void assert_equation_system_exact_solve_to(const char * equations[], EquationStore::Error error, EquationStore::Type type, const char * variables[], const char * solutions[], int numberOfSolutions) {
-  char buffer[200];
   Shared::GlobalContext globalContext;
   EquationStore equationStore;
   int index = 0;
   while (equations[index] != 0) {
     Shared::ExpressionModel * e = equationStore.addEmptyModel();
-    strlcpy(buffer, equations[index++], 200);
-    translate_in_special_chars(buffer);
-    e->setContent(buffer);
+    e->setContent(equations[index++]);
   }
   EquationStore::Error err = equationStore.exactSolve(&globalContext);
   quiz_assert(err == error);
@@ -40,20 +37,15 @@ void assert_equation_system_exact_solve_to(const char * equations[], EquationSto
     quiz_assert(strcmp(equationStore.variableAtIndex(0), variables[0]) == 0);
   }
   for (int i = 0; i < numberOfSolutions; i++) {
-    equationStore.exactSolutionLayoutAtIndex(i, true).serializeForParsing(buffer, 200);
-    translate_in_ASCII_chars(buffer);
-    quiz_assert(strcmp(buffer, solutions[i]) == 0);
+    quiz_assert(strcmp(equationStore.exactSolutionLayoutAtIndex(i, true), solutions[i]) == 0);
   }
 }
 
 void assert_equation_approximate_solve_to(const char * equations, double xMin, double xMax, const char * variable, double solutions[], int numberOfSolutions, bool hasMoreSolutions) {
-  char buffer[200];
   Shared::GlobalContext globalContext;
   EquationStore equationStore;
   Shared::ExpressionModel * e = equationStore.addEmptyModel();
-  strlcpy(buffer, equations, 200);
-  translate_in_special_chars(buffer);
-  e->setContent(buffer);
+  e->setContent(equations);
   EquationStore::Error err = equationStore.exactSolve(&globalContext);
   quiz_assert(err == EquationStore::Error::RequireApproximateSolution);
   equationStore.setIntervalBound(0, xMin);
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index adc6f61bd..54a6367c4 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -199,7 +199,7 @@ bool VariableBoxController::selectLeaf(int selectedRow) {
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = '(';
     assert(nameLength < nameToHandleMaxSize);
-    nameToHandle[nameLength++] = Ion::Charset::Empty;
+    // TODO LEA nameToHandle[nameLength++] = Ion::Charset::Empty;
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = ')';
     assert(nameLength < nameToHandleMaxSize);
diff --git a/apps/variable_box_empty_controller.cpp b/apps/variable_box_empty_controller.cpp
index 0c810bdd8..1f0d4fd7e 100644
--- a/apps/variable_box_empty_controller.cpp
+++ b/apps/variable_box_empty_controller.cpp
@@ -84,8 +84,8 @@ void VariableBoxEmptyController::setType(Type type) {
       messages[0] = I18n::Message::EmptyExpressionBox0;
       messages[1] = I18n::Message::EmptyExpressionBox1;
       messages[2] = I18n::Message::EmptyExpressionBox2;
-      char storeExpression[] = {'3', Ion::Charset::Sto, 'A'};
-      layout = LayoutHelper::String(storeExpression, sizeof(storeExpression), VariableBoxEmptyView::k_font);
+      const char * storeExpression = "3→A";
+      layout = LayoutHelper::String(storeExpression, strlen(storeExpression), VariableBoxEmptyView::k_font);
       break;
     }
     case Type::Functions:
@@ -93,8 +93,8 @@ void VariableBoxEmptyController::setType(Type type) {
       messages[0] = I18n::Message::EmptyFunctionBox0;
       messages[1] = I18n::Message::EmptyFunctionBox1;
       messages[2] = I18n::Message::EmptyFunctionBox2;
-      char storeFunction[] = {'3', '+', Graph::StorageCartesianFunctionStore::Symbol(), Ion::Charset::Sto, 'f', '(', Graph::StorageCartesianFunctionStore::Symbol(), ')'};
-      layout = LayoutHelper::String(storeFunction, sizeof(storeFunction), VariableBoxEmptyView::k_font);
+      const char * storeFunction = "3+x→f(x)";
+      layout = LayoutHelper::String(storeFunction, strlen(storeFunction), VariableBoxEmptyView::k_font);
       break;
     }
     default:
diff --git a/escher/include/escher/editable_field.h b/escher/include/escher/editable_field.h
index 0343d183e..53671bd62 100644
--- a/escher/include/escher/editable_field.h
+++ b/escher/include/escher/editable_field.h
@@ -3,13 +3,14 @@
 
 #include <ion.h>
 #include <escher/input_event_handler.h>
+#include <kandinsky/unicode/code_point.h>
 
 class EditableField : public InputEventHandler {
 public:
   using InputEventHandler::InputEventHandler;
   virtual bool isEditing() const = 0;
   virtual void setEditing(bool isEditing, bool reinitDraftBuffer = true) = 0;
-  virtual char XNTChar(char defaultXNTChar) = 0;
+  virtual CodePoint XNTCodePoint(CodePoint defaultXNTCodePoint) = 0;
   virtual bool shouldFinishEditing(Ion::Events::Event event) = 0;
 };
 
diff --git a/escher/include/escher/layout_field.h b/escher/include/escher/layout_field.h
index bb8a38927..f04ed133b 100644
--- a/escher/include/escher/layout_field.h
+++ b/escher/include/escher/layout_field.h
@@ -28,7 +28,7 @@ public:
   }
   bool hasText() const { return layout().hasText(); }
   Poincare::Layout layout() const { return m_contentView.expressionView()->layout(); }
-  char XNTChar(char defaultXNTChar) override;
+  CodePoint XNTCodePoint(CodePoint defaultXNTCodePoint) override;
 
   // ScrollableView
   void setBackgroundColor(KDColor c) override  {
diff --git a/escher/include/escher/text_field.h b/escher/include/escher/text_field.h
index 49b488747..46a9c73f2 100644
--- a/escher/include/escher/text_field.h
+++ b/escher/include/escher/text_field.h
@@ -20,7 +20,7 @@ public:
   void setText(const char * text);
   void setAlignment(float horizontalAlignment, float verticalAlignment);
   virtual void setEditing(bool isEditing, bool reinitDraftBuffer = true) override;
-  char XNTChar(char defaultXNTChar) override;
+  CodePoint XNTCodePoint(CodePoint defaultXNTCodePoint) override;
   bool handleEventWithText(const char * text, bool indentation = false, bool forceCursorRightOfText = false) override;
   bool handleEvent(Ion::Events::Event event) override;
   constexpr static int maxBufferSize() {
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index b31123263..ecac2dc63 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -68,12 +68,12 @@ void LayoutField::ContentView::layoutCursorSubview() {
   m_cursorView.setFrame(KDRect(cursorTopLeftPosition, LayoutCursor::k_cursorWidth, m_cursor.cursorHeight()));
 }
 
-char LayoutField::XNTChar(char defaultXNTChar) {
-  char xnt = m_contentView.cursor()->layoutReference().XNTChar();
-  if (xnt != Ion::Charset::Empty) {
+CodePoint LayoutField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
+  CodePoint xnt = m_contentView.cursor()->layoutReference().XNTCodePoint();
+  if (xnt != KDCodePointNull) {
     return xnt;
   }
-  return defaultXNTChar;
+  return defaultXNTCodePoint;
 }
 
 void LayoutField::reload(KDSize previousSize) {
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index e9084892c..e7bccb24d 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -30,11 +30,12 @@ bool TextArea::handleEventWithText(const char * text, bool indentation, bool for
 
   // Remove EmptyChars
   for (size_t i = bufferIndex; i < eventTextSize; i++) {
+    /* TODO LEA
     if (text[i] != Ion::Charset::Empty) {
       buffer[bufferIndex++] = text[i];
     } else if (i < cursorIndexInCommand) {
       cursorIndexInCommand--;
-    }
+    } */
   }
 
   if ((indentation && insertTextWithIndentation(buffer, cursorLocation())) || insertTextAtLocation(buffer, cursorLocation())) {
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 7f21bcfc6..1a2190a42 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -1,7 +1,6 @@
 #include <escher/text_field.h>
 #include <escher/text_input_helpers.h>
 #include <escher/clipboard.h>
-#include <ion/charset.h>
 #include <assert.h>
 
 /* TextField::ContentView */
@@ -312,13 +311,14 @@ bool TextField::privateHandleEvent(Ion::Events::Event event) {
   return false;
 }
 
-char TextField::XNTChar(char defaultXNTChar) {
+CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
   static constexpr struct { const char *name; char xnt; } sFunctions[] = {
     { "diff", 'x' }, { "int", 'x' },
     { "product", 'n' }, { "sum", 'n' }
   };
   // Let's assume everything before the cursor is nested correctly, which is reasonable if the expression is being entered left-to-right.
   const char * text = this->text();
+  /* TODO LEA
   size_t location = cursorLocation();
   unsigned level = 0;
   while (location >= 1) {
@@ -355,8 +355,9 @@ char TextField::XNTChar(char defaultXNTChar) {
         break;
     }
   }
+  */
   // Fallback to the default
-  return defaultXNTChar;
+  return defaultXNTCodePoint;
 }
 
 bool TextField::handleEvent(Ion::Events::Event event) {
@@ -404,6 +405,7 @@ bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
 }
 
 bool TextField::handleEventWithText(const char * eventText, bool indentation, bool forceCursorRightOfText) {
+//TODO LEA
   size_t previousTextLength = strlen(text());
   size_t eventTextLength = strlen(eventText);
 
@@ -421,11 +423,11 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
 
   int newBufferIndex = 0;
   // Remove EmptyChars
-  for (size_t i = 0; i < eventTextSize; i++) {
+ /* TODO for (size_t i = 0; i < eventTextSize; i++) {
     if (eventText[i] != Ion::Charset::Empty) {
       buffer[newBufferIndex++] = eventText[i];
     }
-  }
+  }*/
 
   int nextCursorLocation = draftTextLength();
   if (insertTextAtLocation(buffer, cursorLocation())) {
diff --git a/escher/src/text_input_helpers.cpp b/escher/src/text_input_helpers.cpp
index a9600b62b..c210c33a0 100644
--- a/escher/src/text_input_helpers.cpp
+++ b/escher/src/text_input_helpers.cpp
@@ -1,17 +1,17 @@
 #include <escher/text_input_helpers.h>
-#include <ion/charset.h>
 #include <string.h>
 
 namespace TextInputHelpers {
 
 size_t CursorIndexInCommand(const char * text) {
+  // TODO LEA
   size_t index = 0;
   while (text[index] != 0) {
     if (text[index] == '\'' &&  text[index+1] == '\'') {
       return index + 1;
-    } else if (text[index] == Ion::Charset::Empty) {
+    } /* TODO else if (text[index] == Ion::Charset::Empty) {
       return index;
-    }
+    }*/
     index++;
   }
   return index;
diff --git a/ion/include/ion.h b/ion/include/ion.h
index 8c66af6bf..74e62514b 100644
--- a/ion/include/ion.h
+++ b/ion/include/ion.h
@@ -3,7 +3,6 @@
 
 #include <ion/backlight.h>
 #include <ion/battery.h>
-#include <ion/charset.h>
 #include <ion/console.h>
 #include <ion/display.h>
 #include <ion/events.h>
diff --git a/ion/include/ion/charset.h b/ion/include/ion/charset.h
deleted file mode 100644
index 1a18bbfec..000000000
--- a/ion/include/ion/charset.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef ION_CHARSET_H
-#define ION_CHARSET_H
-
-namespace Ion {
-
-enum Charset : char {
-  Integral = (char)127,
-  XBar = (char)128,
-  YBar = (char)130,
-  CapitalGamma = (char)132,
-  CapitalDelta = (char)133,
-  CapitalSigma = (char)134,
-  SmallTheta = (char)135,
-  SmallLambda = (char)136,
-  SmallMu = (char)137,
-  SmallPi = (char)138,
-  SmallSigma = (char)139,
-  IComplex = (char)140,
-  Exponent = (char)141,
-  Prime = (char)142,
-  Exponential = (char)143,
-  Sto = (char)144,
-  Root = (char)145,
-  LessEqual = (char)146,
-  GreaterEqual = (char)147,
-  MultiplicationSign = (char)148,
-  MiddleDot = (char)149,
-  AlmostEqual = (char)150,
-  Degree = (char)151,
-  Empty = (char)152, // This char is used to be parsed into EmptyExpression
-  LeftSuperscript = (char)153, // This char is used to parse Power
-  RightSuperscript = (char)154 // This char is used to parse Power
-};
-
-}
-
-#endif
diff --git a/ion/src/shared/events.cpp b/ion/src/shared/events.cpp
index b5300ec37..89fb1a736 100644
--- a/ion/src/shared/events.cpp
+++ b/ion/src/shared/events.cpp
@@ -1,5 +1,5 @@
 #include <ion/events.h>
-#include <ion/charset.h>
+#include <kandinsky/unicode/code_point.h>
 
 extern "C" {
 #include <assert.h>
@@ -25,42 +25,24 @@ private:
 #define U() EventData::Undefined()
 #define T(x) EventData::Text(x)
 
-static constexpr const char k_exponential[6] = {Ion::Charset::Exponential, '^', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_naperianLogarithm[6] = {'l', 'n', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_logarithm[7] = {'l', 'o', 'g', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_complexI[2] = {Ion::Charset::IComplex, 0};
-
-static constexpr const char k_sine[7] = {'s', 'i', 'n', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_cosine[7] = {'c', 'o', 's', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_tangent[7] = {'t', 'a', 'n', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_pi[2] = {Ion::Charset::SmallPi, 0};
-static constexpr const char k_root[5] = {Ion::Charset::Root, '(', Ion::Charset::Empty, ')', 0};
-
-static constexpr const char k_multiplicationSign[2] = {Ion::Charset::MultiplicationSign, 0};
-static constexpr const char k_exponent[2] = {Ion::Charset::Exponent, 0};
-static constexpr const char k_sto[2] = {Ion::Charset::Sto, 0};
-
-static constexpr const char k_arcSine[8] = {'a', 's', 'i', 'n', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_arcCosine[8] = {'a', 'c', 'o', 's', '(', Ion::Charset::Empty, ')', 0};
-static constexpr const char k_arcTangent[8] = {'a', 't', 'a', 'n', '(', Ion::Charset::Empty, ')', 0};
-
+static_assert('\x11' == KDCodePointEmpty, "Unicode error");
 static constexpr EventData s_dataForEvent[4*Event::PageSize] = {
 // Plain
   TL(), TL(), TL(), TL(), TL(), TL(),
   TL(), TL(), U(),   U(),  U(),  U(),
   TL(), TL(), TL(), TL(), TL(), TL(),
-  T(k_exponential), T(k_naperianLogarithm),  T(k_logarithm), T(k_complexI), T(","), T("^"),
-  T(k_sine), T(k_cosine), T(k_tangent), T(k_pi), T(k_root), T("^2"),
+  T("ℯ^(\x11)"), T("ln(\x11)"),  T("log(\x11)"), T("𝐢"), T(","), T("^"),
+  T("sin(\x11)"), T("cos(\x11)"), T("tan(\x11)"), T("π"), T("√(\x11)"), T("^2"),
   T("7"), T("8"), T("9"), T("("), T(")"), U(),
-  T("4"), T("5"), T("6"), T(k_multiplicationSign), T("/"), U(),
+  T("4"), T("5"), T("6"), T("×"), T("/"), U(),
   T("1"), T("2"), T("3"), T("+"), T("-"), U(),
-  T("0"), T("."), T(k_exponent), TL(), TL(), U(),
+  T("0"), T("."), T("ℯ"), TL(), TL(), U(),
 // Shift
   TL(), U(), U(), TL(), U(), U(),
   U(), U(), U(), U(), U(), U(),
   U(), U(), TL(), TL(), TL(), TL(),
-  T("["), T("]"), T("{"), T("}"), T("_"), T(k_sto),
-  T(k_arcSine), T(k_arcCosine), T(k_arcTangent), T("="), T("<"), T(">"),
+  T("["), T("]"), T("{"), T("}"), T("_"), T("→"),
+  T("arcsin(\x11)"), T("arccos(\x11)"), T("arctan(\x11)"), T("="), T("<"), T(">"),
   U(), U(), U(), U(), U(), U(),
   U(), U(), U(), U(), U(), U(),
   U(), U(), U(), U(), U(), U(),
diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
index fc32a7b1a..e3648384d 100644
--- a/kandinsky/include/kandinsky/unicode/code_point.h
+++ b/kandinsky/include/kandinsky/unicode/code_point.h
@@ -5,9 +5,9 @@
 
 class CodePoint {
 public:
+  constexpr static int MaxCodePointCharLength = sizeof(uint32_t) / sizeof(char);
   constexpr CodePoint(uint32_t c) : m_code(c) {}
-  operator uint16_t() const { return m_code; }
-
+  constexpr operator uint16_t() const { return m_code; }
 
   bool isCombining() const {
     return (m_code >= 0x300 && m_code <= 0x036F);
@@ -16,12 +16,38 @@ private:
   uint32_t m_code;
 };
 
-static constexpr CodePoint KDCodePointNull                      = 0x0;
-static constexpr CodePoint KDCodePointTabulation                = 0x9;
-static constexpr CodePoint KDCodePointLineFeed                  = 0xA;
-static constexpr CodePoint KDCodePointMiddleDot                 = 0xB7;
-static constexpr CodePoint KDCodePointMultiplicationSign        = 0xD7;
-static constexpr CodePoint KDCodePointLatinLetterSmallCapitalE  = 0x1d07;
-static constexpr CodePoint KDCodePointRightwardsArrow           = 0x2192;
+
+// TODO LEA Remove unneeded values
+static constexpr CodePoint KDCodePointNull                     = 0x0;
+static constexpr CodePoint KDCodePointTabulation               = 0x9;
+static constexpr CodePoint KDCodePointLineFeed                 = 0xa;
+
+/* 0x11, 0x12, 0x13, 0x14 represent DEVICE CONTROL ONE TO FOUR. They are not
+ * used, so we can use them for another purpose */
+static constexpr CodePoint KDCodePointEmpty                    = 0x11; // Used to be parsed into EmptyExpression
+static constexpr CodePoint KDCodePointLeftSuperscript          = 0x12; // Used to parse Power
+static constexpr CodePoint KDCodePointRightSuperscript         = 0x13; // Used to parse Power
+static constexpr CodePoint KDCodePointUnknownX                 = 0x14; // Used to store expressions
+
+static constexpr CodePoint KDCodePointSpace                    = 0x20;    //
+static constexpr CodePoint KDCodePointDegree                   = 0xb0;    // °
+static constexpr CodePoint KDCodePointMiddleDot                = 0xb7;    // ·
+static constexpr CodePoint KDCodePointMultiplicationSign       = 0xd7;    // ×
+static constexpr CodePoint KDCodePointGreekCapitalLetterGamma  = 0x393;   // Γ
+static constexpr CodePoint KDCodePointGreekCapitalLetterDelta  = 0x394;   // Δ
+static constexpr CodePoint KDCodePointGreekSmallLetterTheta    = 0x3b8;   // θ
+static constexpr CodePoint KDCodePointGreekSmallLetterLambda   = 0x3bb;   // λ
+static constexpr CodePoint KDCodePointGreekSmallLetterPi       = 0x3c0;   // π
+static constexpr CodePoint KDCodePointGreekSmallLetterSigma    = 0x3c3;   // σ
+static constexpr CodePoint KDCodePointLatinLetterSmallCapitalE = 0x1d07;  // ᴇ
+static constexpr CodePoint KDCodePointScriptSmallE             = 0x212f;  // ℯ
+static constexpr CodePoint KDCodePointRightwardsArrow          = 0x2192;  // →
+static constexpr CodePoint KDCodePointNArySummation            = 0x2211;  // ∑
+static constexpr CodePoint KDCodePointSquareRoot               = 0x221a;  // √
+static constexpr CodePoint KDCodePointIntegral                 = 0x222b;  // ∫
+static constexpr CodePoint KDCodePointAlmostEqualTo            = 0x2248;  // ≈
+static constexpr CodePoint KDCodePointLessThanOrEqualTo        = 0x2264;  // ≤
+static constexpr CodePoint KDCodePointGreaterThanOrEqualTo     = 0x2265;  // ≥
+static constexpr CodePoint KDCodePointMathematicalBoldSmallI   = 0x1d422; // 𝐢
 
 #endif
diff --git a/kandinsky/include/kandinsky/unicode/utf8_decoder.h b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
index f4dab5269..abb768d7f 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
@@ -19,6 +19,7 @@ class UTF8Decoder {
 public:
   UTF8Decoder(const char * string) : m_string(string) {}
   CodePoint nextCodePoint();
+  static size_t CharSizeOfCodePoint(CodePoint c);
   static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
 private:
   const char * m_string;
diff --git a/kandinsky/src/unicode/utf8_decoder.cpp b/kandinsky/src/unicode/utf8_decoder.cpp
index bdb6ed370..cb6f449d3 100644
--- a/kandinsky/src/unicode/utf8_decoder.cpp
+++ b/kandinsky/src/unicode/utf8_decoder.cpp
@@ -25,8 +25,14 @@ CodePoint UTF8Decoder::nextCodePoint() {
   return CodePoint(result);
 }
 
+size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength;
+  char buffer[bufferSize];
+  return CodePointToChars(c, buffer, bufferSize);
+}
+
 size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize) {
-  assert(bufferSize >= sizeof(CodePoint)/sizeof(char));
+  assert(bufferSize >= CodePoint::MaxCodePointCharLength);
   size_t i = 0;
   if (c <= 0x7F) {
     buffer[i++] = c;
diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index 06f5adb91..28d3970e7 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -63,7 +63,7 @@ private:
 class CodePointLayout final : public Layout {
 public:
   CodePointLayout(const CodePointLayoutNode * n) : Layout(n) {}
-  static CharLayout Builder(CodePoint c, const KDFont * font = KDFont::LargeFont);
+  static CodePointLayout Builder(CodePoint c, const KDFont * font = KDFont::LargeFont);
   const KDFont * font() const { return const_cast<CodePointLayout *>(this)->node()->font(); }
   CodePoint codePoint() const { return const_cast<CodePointLayout *>(this)->node()->codePoint(); }
 private:
diff --git a/poincare/include/poincare/constant.h b/poincare/include/poincare/constant.h
index 9f09fbbe1..e0a9c5626 100644
--- a/poincare/include/poincare/constant.h
+++ b/poincare/include/poincare/constant.h
@@ -5,6 +5,9 @@
 
 namespace Poincare {
 
+/* TODO: Also keep a m_codePoint ? Redundant with m_name, but faster constants
+ * comparison */
+
 class ConstantNode final : public SymbolAbstractNode {
 public:
   ConstantNode(const char * newName, int length);
@@ -35,9 +38,10 @@ public:
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
 
   /* Symbol properties */
-  bool isPi() const { return isConstantChar(Ion::Charset::SmallPi); }
-  bool isExponential() const { return isConstantChar(Ion::Charset::Exponential); }
-  bool isIComplex() const { return isConstantChar(Ion::Charset::IComplex); }
+  bool isPi() const { return isConstantCodePoint(KDCodePointGreekSmallLetterPi); }
+  bool isExponential() const { return isConstantCodePoint(KDCodePointScriptSmallE); }
+  bool isIComplex() const { return isConstantCodePoint(KDCodePointMathematicalBoldSmallI); }
+  CodePoint codePoint() const;
 
   // Comparison
   int simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
@@ -49,13 +53,13 @@ private:
 
   size_t nodeSize() const override { return sizeof(ConstantNode); }
   template<typename T> Evaluation<T> templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
-  bool isConstantChar(char c) const { const char constantName[2] = {c, 0}; return strcmp(m_name, constantName) == 0; }
+  bool isConstantCodePoint(CodePoint c) const;
 };
 
 class Constant final : public SymbolAbstract {
 public:
   Constant(const ConstantNode * node) : SymbolAbstract(node) {}
-  static Constant Builder(char name) { return SymbolAbstract::Builder<Constant, ConstantNode>(&name, 1); }
+  static Constant Builder(CodePoint c);
 
   // Constant properties
   bool isPi() const { return node()->isPi(); }
diff --git a/poincare/include/poincare/integral_layout.h b/poincare/include/poincare/integral_layout.h
index 30b8901cf..9b33b2c40 100644
--- a/poincare/include/poincare/integral_layout.h
+++ b/poincare/include/poincare/integral_layout.h
@@ -22,7 +22,7 @@ public:
   void deleteBeforeCursor(LayoutCursor * cursor) override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   LayoutNode * layoutToPointWhenInserting() override { return lowerBoundLayout(); }
-  char XNTChar() const override { return 'x'; }
+  CodePoint XNTCodePoint() const override { return 'x'; }
 
   // TreeNode
   size_t size() const override { return sizeof(IntegralLayoutNode); }
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index 306b93355..7cffc3ded 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -54,7 +54,7 @@ public:
   int leftCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->leftCollapsingAbsorbingChildIndex(); }
   int rightCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->rightCollapsingAbsorbingChildIndex(); }
   bool hasText() { return node()->hasText(); }
-  char XNTChar() const { return const_cast<Layout *>(this)->node()->XNTChar(); }
+  CodePoint XNTCodePoint() const { return const_cast<Layout *>(this)->node()->XNTCodePoint(); }
 
   // Layout modification
   void deleteBeforeCursor(LayoutCursor * cursor) { return node()->deleteBeforeCursor(cursor); }
diff --git a/poincare/include/poincare/layout_helper.h b/poincare/include/poincare/layout_helper.h
index d9b3a37c8..92a2036f8 100644
--- a/poincare/include/poincare/layout_helper.h
+++ b/poincare/include/poincare/layout_helper.h
@@ -15,6 +15,7 @@ namespace LayoutHelper {
   /* Create special layouts */
   Layout Parentheses(Layout layout, bool cloneLayout);
   HorizontalLayout String(const char * buffer, int bufferLen, const KDFont * font = KDFont::LargeFont);
+  HorizontalLayout CodePointString(const CodePoint * buffer, int bufferLen, const KDFont * font = KDFont::LargeFont);
   Layout Logarithm(Layout argument, Layout index);
 };
 
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index 37c8899f9..d73188a7d 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -3,7 +3,6 @@
 
 #include <poincare/tree_node.h>
 #include <kandinsky.h>
-#include <ion/charset.h>
 
 namespace Poincare {
 
@@ -106,9 +105,9 @@ public:
   virtual bool isMatrix() const { return false; }
   virtual bool isCodePoint() const { return false; }
   virtual bool hasUpperLeftIndex() const { return false; }
-  virtual char XNTChar() const {
+  virtual CodePoint XNTCodePoint() const {
     LayoutNode * p = parent();
-    return p == nullptr ? Ion::Charset::Empty : p->XNTChar();
+    return p == nullptr ? KDCodePointNull : p->XNTCodePoint();
   }
 
   virtual bool willAddChildAtIndex(LayoutNode * l, int * index, int * currentNumberOfChildren, LayoutCursor * cursor) { return true; }
diff --git a/poincare/include/poincare/print_float.h b/poincare/include/poincare/print_float.h
index 7509878b0..26dfb0a2d 100644
--- a/poincare/include/poincare/print_float.h
+++ b/poincare/include/poincare/print_float.h
@@ -47,7 +47,7 @@ namespace PrintFloat {
   template <class T>
   int convertFloatToText(T d, char * buffer, int bufferSize, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, bool allowRounding = true);
   template <class T>
-  static int convertFloatToTextPrivate(T f, char * buffer, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, int * numberOfRemovedZeros);
+  static int convertFloatToTextPrivate(T f, char * buffer, int bufferSize, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, int * numberOfRemovedZeros);
 }
 
 }
diff --git a/poincare/include/poincare/sequence_layout.h b/poincare/include/poincare/sequence_layout.h
index 59ef8d34d..28d2a48d5 100644
--- a/poincare/include/poincare/sequence_layout.h
+++ b/poincare/include/poincare/sequence_layout.h
@@ -20,7 +20,7 @@ public:
   void moveCursorDown(LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited = false) override;
   void deleteBeforeCursor(LayoutCursor * cursor) override;
   LayoutNode * layoutToPointWhenInserting() override { return lowerBoundLayout(); }
-  char XNTChar() const override { return 'n'; }
+  CodePoint XNTCodePoint() const override { return 'n'; }
 
   // TreeNode
   int numberOfChildren() const override { return 4; }
diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index 6d2a0de39..e0ed71193 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -30,6 +30,7 @@ namespace SerializationHelper {
   // Write one char in a buffer
   int Char(char * buffer, int bufferSize, char c);
   // Write one code point in a buffer
+  constexpr int MaxSerializedCodePointSize = CodePoint::MaxCodePointCharLength + 1; // Null-terminating char
   int CodePoint(char * buffer, int bufferSize, CodePoint c);
 };
 
diff --git a/poincare/include/poincare/square_root.h b/poincare/include/poincare/square_root.h
index 4ea8737d1..0cc02f5d0 100644
--- a/poincare/include/poincare/square_root.h
+++ b/poincare/include/poincare/square_root.h
@@ -4,7 +4,6 @@
 #include <poincare/approximation_helper.h>
 #include <poincare/expression.h>
 #include <poincare/multiplication.h>
-#include <ion/charset.h>
 
 namespace Poincare {
 
@@ -42,13 +41,8 @@ class SquareRoot final : public Expression {
 public:
   SquareRoot(const SquareRootNode * n) : Expression(n) {}
   static SquareRoot Builder(Expression child) { return TreeHandle::FixedArityBuilder<SquareRoot, SquareRootNode>(&child, 1); }
-
-  static_assert('\x91' == Ion::Charset::Root, "Charset error");
-  static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("\x91", 1, &UntypedBuilderOneChild<SquareRoot>);
-
+  static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("√", 1, &UntypedBuilderOneChild<SquareRoot>);
   Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
-private:
-  static const char k_name[2];
 };
 
 }
diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index 3c4c93ec4..e7715e65e 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -61,7 +61,7 @@ public:
   enum SpecialSymbols : char {
     /* We can use characters from 1 to 31 as they do not correspond to usual
      * characters but events as 'end of text', 'backspace'... */
-    UnknownX = 1,
+    UnknownX = 1 //TODO LEA make sure there is no collision with the code points
   };
   Symbol(const SymbolNode * node) : SymbolAbstract(node) {}
   static Symbol Builder(const char * name, int length) { return SymbolAbstract::Builder<Symbol, SymbolNode>(name, length); }
diff --git a/poincare/include/poincare/trigonometry_cheat_table.h b/poincare/include/poincare/trigonometry_cheat_table.h
index eb81172d5..0ae4f678a 100644
--- a/poincare/include/poincare/trigonometry_cheat_table.h
+++ b/poincare/include/poincare/trigonometry_cheat_table.h
@@ -7,7 +7,7 @@
 namespace Poincare {
 
   /* We use the cheat table to look for known simplifications (e.g. cos(0)=1,
-   * cos(Pi/2)=1...). For each entry of the table, we store its expression and
+   * cos(π/2)=1...). For each entry of the table, we store its expression and
    * its float approximation in order to quickly scan the table looking for our
    * input approximation. If one entry matches the float approximation, we then
    * check that the actual expression of our input is equivalent to the table
diff --git a/poincare/src/complex_argument.cpp b/poincare/src/complex_argument.cpp
index eb6983ec3..b803c66eb 100644
--- a/poincare/src/complex_argument.cpp
+++ b/poincare/src/complex_argument.cpp
@@ -57,7 +57,7 @@ Expression ComplexArgument::shallowReduce(Context & context, Preferences::Comple
       return result;
     } else if (!std::isnan(app) && app <= -Expression::Epsilon<float>()) {
       // arg(x) = Pi if x < 0
-      Expression result = Constant::Builder(Ion::Charset::SmallPi);
+      Expression result = Constant::Builder(KDCodePointGreekSmallLetterPi);
       replaceWithInPlace(result);
       return result;
     }
diff --git a/poincare/src/complex_cartesian.cpp b/poincare/src/complex_cartesian.cpp
index ce0416d42..70b027169 100644
--- a/poincare/src/complex_cartesian.cpp
+++ b/poincare/src/complex_cartesian.cpp
@@ -152,7 +152,7 @@ Expression ComplexCartesian::argument(Context & context, Preferences::ComplexFor
     }
     // Then, compute sign(b) * Pi/2 - arctan(a/b)
     Expression signb = SignFunction::Builder(b);
-    Expression signbPi2 = Multiplication::Builder(Rational::Builder(1,2), signb, Constant::Builder(Ion::Charset::SmallPi));
+    Expression signbPi2 = Multiplication::Builder(Rational::Builder(1,2), signb, Constant::Builder(KDCodePointGreekSmallLetterPi));
     signb.shallowReduce(context, complexFormat, angleUnit, target);
     Expression sub = Subtraction::Builder(signbPi2, arcTangent);
     signbPi2.shallowReduce(context, complexFormat, angleUnit, target);
@@ -163,7 +163,7 @@ Expression ComplexCartesian::argument(Context & context, Preferences::ComplexFor
     Expression signa = SignFunction::Builder(a).shallowReduce(context, complexFormat, angleUnit, target);
     Subtraction sub = Subtraction::Builder(Rational::Builder(1), signa);
     signa.shallowReduce(context, complexFormat, angleUnit, target);
-    Multiplication mul = Multiplication::Builder(Rational::Builder(1,2), Constant::Builder(Ion::Charset::SmallPi), sub);
+    Multiplication mul = Multiplication::Builder(Rational::Builder(1,2), Constant::Builder(KDCodePointGreekSmallLetterPi), sub);
     sub.shallowReduce(context, complexFormat, angleUnit, target);
     return mul;
   }
@@ -330,7 +330,7 @@ ComplexCartesian ComplexCartesian::power(ComplexCartesian & other, Context & con
   rclone.shallowReduce(context, complexFormat, angleUnit, target);
   Expression thmuld = Multiplication::Builder(Rational::Builder(-1), thclone, d.clone());
   thclone.shallowReduce(context, complexFormat, angleUnit, target);
-  Expression exp = Power::Builder(Constant::Builder(Ion::Charset::Exponential), thmuld);
+  Expression exp = Power::Builder(Constant::Builder(KDCodePointScriptSmallE), thmuld);
   thmuld.shallowReduce(context, complexFormat, angleUnit, target);
   Multiplication norm = Multiplication::Builder(rpowc, exp);
   rpowc.shallowReduce(context, complexFormat, angleUnit, target);
diff --git a/poincare/src/constant.cpp b/poincare/src/constant.cpp
index 2f971598c..788cf5135 100644
--- a/poincare/src/constant.cpp
+++ b/poincare/src/constant.cpp
@@ -4,10 +4,13 @@
 #include <poincare/layout_helper.h>
 #include <poincare/complex_cartesian.h>
 #include <poincare/rational.h>
+#include <poincare/serialization_helper.h>
+#include <poincare/unreal.h>
 #include <poincare/unreal.h>
 #include <ion.h>
 #include <cmath>
 #include <assert.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
@@ -26,13 +29,13 @@ bool ConstantNode::isReal(Context & context) const {
   return !isIComplex();
 }
 
-int rankOfConstant(char c) {
+int rankOfConstant(CodePoint c) {
   switch (c) {
-    case Ion::Charset::IComplex:
+    case KDCodePointMathematicalBoldSmallI :
       return 0;
-    case Ion::Charset::SmallPi:
+    case KDCodePointGreekSmallLetterPi :
       return 1;
-    case Ion::Charset::Exponential:
+    case KDCodePointScriptSmallE :
       return 2;
     default:
       assert(false);
@@ -40,12 +43,19 @@ int rankOfConstant(char c) {
   }
 }
 
+CodePoint ConstantNode::codePoint() const {
+  UTF8Decoder decoder = UTF8Decoder(m_name);
+  CodePoint result = decoder.nextCodePoint();
+  assert(decoder.nextCodePoint() == KDCodePointNull);
+  return result;
+}
+
 int ConstantNode::simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const {
   if (!ascending) {
     return e->simplificationOrderSameType(this, true, canBeInterrupted);
   }
   assert(type() == e->type());
-  return (rankOfConstant(name()[0]) - rankOfConstant(static_cast<const ConstantNode *>(e)->name()[0]));
+  return rankOfConstant(codePoint()) - rankOfConstant(static_cast<const ConstantNode *>(e)->codePoint());
 }
 
 Layout ConstantNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
@@ -62,7 +72,6 @@ int ConstantNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
 template<typename T>
 Evaluation<T> ConstantNode::templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const {
   if (isIComplex()) {
-    assert(m_name[1] == 0);
     return Complex<T>::Builder(0.0, 1.0);
   }
   if (isPi()) {
@@ -76,11 +85,26 @@ Expression ConstantNode::shallowReduce(Context & context, Preferences::ComplexFo
   return Constant(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
+bool ConstantNode::isConstantCodePoint(CodePoint c) const {
+  UTF8Decoder decoder(m_name);
+  bool result = (decoder.nextCodePoint() == c);
+  assert(decoder.nextCodePoint() == KDCodePointNull);
+  return result;
+}
+
+Constant Constant::Builder(CodePoint c) {
+  constexpr int bufferSize = SerializationHelper::MaxSerializedCodePointSize;
+  char buffer[bufferSize];
+  size_t codePointSize = SerializationHelper::CodePoint(buffer, bufferSize, c);
+  return SymbolAbstract::Builder<Constant, ConstantNode>(buffer, codePointSize);
+}
+
 Expression Constant::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
   Expression result;
-  if (complexFormat == Preferences::ComplexFormat::Real && isIComplex()) {
+  bool isI = isIComplex();
+  if (complexFormat == Preferences::ComplexFormat::Real && isI) {
     result = Unreal::Builder();
-  } else if (target == ExpressionNode::ReductionTarget::User && isIComplex()) {
+  } else if (target == ExpressionNode::ReductionTarget::User && isI) {
     result = ComplexCartesian::Builder(Rational::Builder(0), Rational::Builder(1));
   }
   if (!result.isUninitialized()) {
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index 1e88397e9..fcad08c9a 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -4,6 +4,7 @@
 #include <poincare/infinity.h>
 #include <poincare/undefined.h>
 #include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
 #include <poincare/ieee754.h>
 #include <assert.h>
 #include <ion.h>
@@ -176,7 +177,8 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
       return currentChar;
     }
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
-    buffer[currentChar++] = Ion::Charset::Exponent;
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, KDCodePointScriptSmallE);
+    if (currentChar >= bufferSize-1) { return bufferSize-1; }
     currentChar += Integer(exponent).serialize(buffer+currentChar, bufferSize-currentChar);
     return currentChar;
   }
diff --git a/poincare/src/empty_expression.cpp b/poincare/src/empty_expression.cpp
index 882d6311f..88bd12e1f 100644
--- a/poincare/src/empty_expression.cpp
+++ b/poincare/src/empty_expression.cpp
@@ -2,12 +2,11 @@
 #include <poincare/complex.h>
 #include <poincare/empty_layout.h>
 #include <poincare/serialization_helper.h>
-#include <ion/charset.h>
 
 namespace Poincare {
 
 int EmptyExpressionNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  return SerializationHelper::Char(buffer, bufferSize, Ion::Charset::Empty);
+  return SerializationHelper::CodePoint(buffer, bufferSize, KDCodePointEmpty);
 }
 
 Layout EmptyExpressionNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index ec19edd2f..b08f8e3ff 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -342,9 +342,10 @@ void Expression::SetEncounteredComplex(bool encounterComplex) {
 }
 
 Preferences::ComplexFormat Expression::UpdatedComplexFormatWithTextInput(Preferences::ComplexFormat complexFormat, const char * textInput) {
-  if (complexFormat == Preferences::ComplexFormat::Real && strchr(textInput, Ion::Charset::IComplex) != nullptr) {
+  /* TODO LEA if (complexFormat == Preferences::ComplexFormat::Real && strchr(textInput, KDCodePointMathematicalBoldSmallI) != nullptr) {
     return Preferences::ComplexFormat::Cartesian;
   }
+  */
   return complexFormat;
 }
 
@@ -519,12 +520,12 @@ Expression Expression::ExpressionWithoutSymbols(Expression e, Context & context)
 
 Expression Expression::radianToDegree() {
   // e*180/Pi
-  return Multiplication::Builder(*this, Rational::Builder(180), Power::Builder(Constant::Builder(Ion::Charset::SmallPi), Rational::Builder(-1)));
+  return Multiplication::Builder(*this, Rational::Builder(180), Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(-1)));
 }
 
 Expression Expression::degreeToRadian() {
   // e*Pi/180
-  return Multiplication::Builder(*this, Rational::Builder(1, 180), Constant::Builder(Ion::Charset::SmallPi));
+  return Multiplication::Builder(*this, Rational::Builder(1, 180), Constant::Builder(KDCodePointGreekSmallLetterPi));
 }
 
 Expression Expression::reduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
@@ -626,9 +627,9 @@ Expression Expression::CreateComplexExpression(Expression ra, Expression tb, Pre
       }
       if (!isZeroTb) {
         if (isOneTb) {
-          imag = Constant::Builder(Ion::Charset::IComplex);
+          imag = Constant::Builder(KDCodePointMathematicalBoldSmallI);
         } else {
-          imag = Multiplication::Builder(tb , Constant::Builder(Ion::Charset::IComplex));
+          imag = Multiplication::Builder(tb , Constant::Builder(KDCodePointMathematicalBoldSmallI));
         }
       }
       if (imag.isUninitialized()) {
@@ -657,14 +658,14 @@ Expression Expression::CreateComplexExpression(Expression ra, Expression tb, Pre
       if (!isZeroRa && !isZeroTb) {
         Expression arg;
         if (isOneTb) {
-          arg = Constant::Builder(Ion::Charset::IComplex);
+          arg = Constant::Builder(KDCodePointMathematicalBoldSmallI);
         } else {
-          arg = Multiplication::Builder(tb, Constant::Builder(Ion::Charset::IComplex));
+          arg = Multiplication::Builder(tb, Constant::Builder(KDCodePointMathematicalBoldSmallI));
         }
         if (isNegativeTb) {
           arg = Opposite::Builder(arg);
         }
-        exp = Power::Builder(Constant::Builder(Ion::Charset::Exponential), arg);
+        exp = Power::Builder(Constant::Builder(KDCodePointScriptSmallE), arg);
       }
       if (exp.isUninitialized()) {
         return norm;
diff --git a/poincare/src/expression_debug.cpp b/poincare/src/expression_debug.cpp
index f99d9523f..34eaa839d 100644
--- a/poincare/src/expression_debug.cpp
+++ b/poincare/src/expression_debug.cpp
@@ -213,14 +213,16 @@ void print_expression(const Expression e, int indentationLevel) {
       break;
     case ExpressionNode::Type::Symbol:
       std::cout << "Symbol(";
-      switch (static_cast<const Symbol &>(e).name()) {
-        case Ion::Charset::SmallPi:
+      UTF8Decoder decoder(static_cast<const Symbol &>(e).name());
+      CodePoint firstCodePoint = decoder.nextCodePoint();
+      switch (firstCodePoint) {
+        case KDCodePointGreekSmallLetterPi:
           std::cout << "PI";
           break;
-        case Ion::Charset::IComplex:
+        case KDCodePointMathematicalBoldSmallI:
           std::cout << "i";
           break;
-        case Ion::Charset::Exponential:
+        case KDCodePointScriptSmallE:
           std::cout << "e";
           break;
         default:
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 2b615d11a..4443c13fd 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -3,7 +3,6 @@
 #include <poincare/horizontal_layout.h>
 #include <poincare/layout_helper.h>
 #include <poincare/serialization_helper.h>
-#include <ion/charset.h>
 #include <escher/metric.h>
 #include <assert.h>
 
@@ -135,7 +134,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 
   // Add a multiplication if omitted.
   if (idxInParent > 0 && p->isHorizontal() && p->childAtIndex(idxInParent - 1)->canBeOmittedMultiplicationLeftFactor()) {
-    buffer[numberOfChar++] = Ion::Charset::MiddleDot;
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
@@ -159,7 +158,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 
   // Add a multiplication if omitted.
   if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->isHorizontal() && p->childAtIndex(idxInParent + 1)->canBeOmittedMultiplicationRightFactor()) {
-    buffer[numberOfChar++] = Ion::Charset::MiddleDot;
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index a5f9346e5..9c29bd146 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -9,7 +9,6 @@
 #include <poincare/nth_root_layout.h>
 #include <poincare/right_parenthesis_layout.h>
 #include <poincare/vertical_offset_layout.h>
-#include <ion/charset.h>
 #include <stdio.h>
 
 namespace Poincare {
@@ -75,7 +74,7 @@ void LayoutCursor::move(MoveDirection direction, bool * shouldRecomputeLayout) {
 void LayoutCursor::addEmptyExponentialLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CodePointLayout::Builder(Ion::Charset::Exponential),
+      CodePointLayout::Builder(KDCodePointScriptSmallE),
       VerticalOffsetLayout::Builder(emptyLayout, VerticalOffsetLayoutNode::Type::Superscript));
   m_layout.addSibling(this, sibling, false);
   m_layout = emptyLayout;
@@ -114,7 +113,7 @@ void LayoutCursor::addEmptySquarePowerLayout() {
 void LayoutCursor::addEmptyTenPowerLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CodePointLayout::Builder(Ion::Charset::MiddleDot),
+      CodePointLayout::Builder(KDCodePointMiddleDot),
       CodePointLayout::Builder('1'),
       CodePointLayout::Builder('0'),
       VerticalOffsetLayout::Builder(
@@ -133,10 +132,12 @@ void LayoutCursor::addFractionLayoutAndCollapseSiblings() {
 }
 
 void LayoutCursor::addXNTCodePointLayout() {
-  m_layout.addSibling(this, CodePointLayout::Builder(m_layout.XNTChar()), true);
+  m_layout.addSibling(this, CodePointLayout::Builder(m_layout.XNTCodePoint()), true);
 }
 
 void LayoutCursor::insertText(const char * text) {
+// TODO LEA
+#if 0
   int textLength = strlen(text);
   if (textLength <= 0) {
     return;
@@ -144,12 +145,12 @@ void LayoutCursor::insertText(const char * text) {
   Layout newChild;
   Layout pointedChild;
   for (int i = 0; i < textLength; i++) {
-    if (text[i] == Ion::Charset::Empty) {
+    if (text[i] == //TODO Ion::Charset::Empty) {
       continue;
     }
-    if (text[i] == Ion::Charset::MultiplicationSign) {
-      newChild = CodePointLayout::Builder(Ion::Charset::MiddleDot);
-    } else if (text[i] == '(') {
+    if (text[i] == //TODO Ion::Charset::MultiplicationSign) {
+      newChild = CodePointLayout::Builder(KDCodePointMiddleDot);
+    } else*/ if (text[i] == '(') {
       newChild = LeftParenthesisLayout::Builder();
       if (pointedChild.isUninitialized()) {
         pointedChild = newChild;
@@ -175,6 +176,7 @@ void LayoutCursor::insertText(const char * text) {
     m_layout = pointedChild;
     m_position = Position::Right;
   }
+#endif
 }
 
 void LayoutCursor::addLayoutAndMoveCursor(Layout l) {
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index d713ec1eb..9555eab3e 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -54,6 +54,16 @@ Layout LayoutHelper::Parentheses(Layout layout, bool cloneLayout) {
 }
 
 HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const KDFont * font) {
+  assert(bufferLen > 0);
+  HorizontalLayout resultLayout = HorizontalLayout::Builder();
+  /* TODO LEA */
+  for (int i = 0; i < bufferLen; i++) {
+    resultLayout.addChildAtIndex(CodePointLayout::Builder(buffer[i], font), i, i, nullptr);
+  }
+  return resultLayout;
+}
+
+HorizontalLayout LayoutHelper::CodePointString(const CodePoint * buffer, int bufferLen, const KDFont * font) {
   assert(bufferLen > 0);
   HorizontalLayout resultLayout = HorizontalLayout::Builder();
   for (int i = 0; i < bufferLen; i++) {
diff --git a/poincare/src/logarithm.cpp b/poincare/src/logarithm.cpp
index 4301d3c07..1e911c6e3 100644
--- a/poincare/src/logarithm.cpp
+++ b/poincare/src/logarithm.cpp
@@ -341,7 +341,7 @@ Expression Logarithm::splitLogarithmInteger(Integer i, bool isDenominator, Conte
 
 Expression Logarithm::shallowBeautify() {
   assert(numberOfChildren() == 2);
-  Constant e = Constant::Builder(Ion::Charset::Exponential);
+  Constant e = Constant::Builder(KDCodePointScriptSmallE);
   if (childAtIndex(1).isIdenticalTo(e)) {
     NaperianLogarithm np = NaperianLogarithm::Builder(childAtIndex(0));
     replaceWithInPlace(np);
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index 29aceb262..edc28d20e 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -85,13 +85,17 @@ bool MultiplicationNode::childNeedsParenthesis(const TreeNode * child) const {
 }
 
 Layout MultiplicationNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  const char middleDotString[] = {Ion::Charset::MiddleDot, 0};
-  return LayoutHelper::Infix(Multiplication(this), floatDisplayMode, numberOfSignificantDigits, middleDotString);
+  constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
+  char string[stringMaxSize];
+  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointMiddleDot);
+  return LayoutHelper::Infix(Multiplication(this), floatDisplayMode, numberOfSignificantDigits, string);
 }
 
 int MultiplicationNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  const char multiplicationString[] = {Ion::Charset::MultiplicationSign, 0};
-  return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, multiplicationString);
+  constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
+  char string[stringMaxSize];
+  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointMultiplicationSign);
+  return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, string);
 }
 
 Expression MultiplicationNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
diff --git a/poincare/src/naperian_logarithm.cpp b/poincare/src/naperian_logarithm.cpp
index 29ea6cb9b..56fb53063 100644
--- a/poincare/src/naperian_logarithm.cpp
+++ b/poincare/src/naperian_logarithm.cpp
@@ -35,7 +35,7 @@ Expression NaperianLogarithm::shallowReduce(Context & context, Preferences::Comp
     return SimplificationHelper::Map(*this, context, angleUnit);
   }
 #endif
-  Logarithm l = Logarithm::Builder(childAtIndex(0), Constant::Builder(Ion::Charset::Exponential));
+  Logarithm l = Logarithm::Builder(childAtIndex(0), Constant::Builder(KDCodePointScriptSmallE));
   replaceWithInPlace(l);
   return l.shallowReduce(context, complexFormat, angleUnit, target);
 }
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index 4e7dd4573..898641318 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -3,7 +3,6 @@
 #include <poincare/square_root.h>
 #include <poincare/layout_helper.h>
 #include <poincare/serialization_helper.h>
-#include <ion/charset.h>
 #include <assert.h>
 
 namespace Poincare {
@@ -169,7 +168,7 @@ int NthRootLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pri
   buffer[bufferSize-1] = 0;
   int numberOfChar = 0;
 
-  buffer[numberOfChar++] = Ion::Charset::Root;
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointSquareRoot);
   if (numberOfChar >= bufferSize-1) {
     return bufferSize-1;
   }
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 9b7d440f7..f5143f235 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -1,57 +1,56 @@
 #include "tokenizer.h"
-#include <ion/charset.h>
 #include <poincare/number.h>
 #include <kandinsky/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
-static inline bool isLetter(const char c) {
+static inline bool isLetter(const CodePoint c) {
   return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
 }
 
-static inline bool isDigit(const char c) {
+static inline bool isDigit(const CodePoint c) {
   return '0' <= c && c <= '9';
 }
 
-const char Tokenizer::nextChar(PopTest popTest, char context, bool * testResult) {
-  // Beware of chars spaning over more than one byte: use the UTF8Decoder.
+const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, bool * testResult) {
   UTF8Decoder decoder(m_text);
   CodePoint firstCodePoint = decoder.nextCodePoint();
-  int numberOfBytesForChar = 1;
+  size_t numberOfBytesForCodePoint = UTF8Decoder::CharSizeOfCodePoint(firstCodePoint);
   if (firstCodePoint != KDCodePointNull) {
     CodePoint codePoint = decoder.nextCodePoint();
     while (codePoint.isCombining()) {
-      numberOfBytesForChar++;
+      numberOfBytesForCodePoint = UTF8Decoder::CharSizeOfCodePoint(codePoint);
       codePoint = decoder.nextCodePoint();
     }
   }
-  char c = *m_text; // TODO handle combined chars?
-  bool shouldPop = popTest(c, context);
+  // TODO handle combined code points?
+  bool shouldPop = popTest(firstCodePoint, context);
   if (testResult != nullptr) {
     *testResult = shouldPop;
   }
   if (shouldPop) {
-    m_text+= numberOfBytesForChar;
+    m_text+= numberOfBytesForCodePoint;
   }
-  return c;
+  return firstCodePoint;
 }
 
-const char Tokenizer::popChar() {
-  return nextChar([](char c, char context) { return true; });
-  // m_text now points to the start of the character after the returned char.
+const CodePoint Tokenizer::popCodePoint() {
+  return nextCodePoint([](CodePoint c, CodePoint context) { return true; });
+  /* m_text now points to the start of the first non combining code point after
+   * the returned code point. */
 }
 
-bool Tokenizer::canPopChar (const char c) {
+bool Tokenizer::canPopCodePoint(const CodePoint c) {
   bool didPop = false;
-  nextChar([](char nextC, char context) { return nextC == context; }, c, &didPop);
+  nextCodePoint([](CodePoint nextC, CodePoint context) { return nextC == context; }, c, &didPop);
   return didPop;
 }
 
-size_t Tokenizer::popWhile(PopTest popTest, char context) {
+size_t Tokenizer::popWhile(PopTest popTest, CodePoint context) {
   size_t length = 0;
   bool didPop = true;
   while (didPop) {
-    nextChar(popTest, context, &didPop);
+    nextCodePoint(popTest, context, &didPop);
     if (didPop) {
       length++;
     }
@@ -60,11 +59,11 @@ size_t Tokenizer::popWhile(PopTest popTest, char context) {
 }
 
 size_t Tokenizer::popIdentifier() {
-  return popWhile([](char c, char context) { return isLetter(c) || isDigit(c) || c == context; }, '_');
+  return popWhile([](CodePoint c, CodePoint context) { return isLetter(c) || isDigit(c) || c == context; }, '_');
 }
 
 size_t Tokenizer::popDigits() {
-  return popWhile([](char c, char context) { return isDigit(c); });
+  return popWhile([](CodePoint c, CodePoint context) { return isDigit(c); });
 }
 
 Token Tokenizer::popNumber() {
@@ -75,7 +74,7 @@ Token Tokenizer::popNumber() {
   size_t fractionalPartLength = 0;
 
   assert(integralPartLength > 0 || *m_text == '.');
-  if (canPopChar('.')) {
+  if (canPopCodePoint('.')) {
     fractionalPartText = m_text;
     fractionalPartLength = popDigits();
   }
@@ -87,8 +86,8 @@ Token Tokenizer::popNumber() {
   const char * exponentPartText = m_text;
   size_t exponentPartLength = 0;
   bool exponentIsNegative = false;
-  if (canPopChar(Ion::Charset::Exponent)) {
-    exponentIsNegative = canPopChar('-');
+  if (canPopCodePoint(KDCodePointLatinLetterSmallCapitalE)) {
+    exponentIsNegative = canPopCodePoint('-');
     exponentPartText = m_text;
     exponentPartLength = popDigits();
     if (exponentPartLength == 0) {
@@ -103,30 +102,30 @@ Token Tokenizer::popNumber() {
 
 Token Tokenizer::popToken() {
   // Skip whitespaces
-  while (canPopChar(' ')) {}
+  while (canPopCodePoint(' ')) {}
 
-  /* Save for later use (since m_text is altered by popChar, popNumber,
+  /* Save for later use (since m_text is altered by popCodePoint, popNumber,
    * popIdentifier). */
   const char * start = m_text;
 
-  /* If the next char is the start of a number, we do not want to pop it because
-   * popNumber needs this char. */
-  bool nextCharIsNeitherDotNorDigit = true;
-  const char currentChar = nextChar([](char c, char context) { return c != context && !isDigit(c); }, '.', &nextCharIsNeitherDotNorDigit);
+  /* If the next code point is the start of a number, we do not want to pop it
+   * because popNumber needs this code point. */
+  bool nextCodePointIsNeitherDotNorDigit = true;
+  const CodePoint c = nextCodePoint([](CodePoint cp, CodePoint context) { return cp != context && !isDigit(cp); }, '.', &nextCodePointIsNeitherDotNorDigit);
 
-  // According to currentChar, recognize the Token::Type.
-  if (!nextCharIsNeitherDotNorDigit) {
+  // According to c, recognize the Token::Type.
+  if (!nextCodePointIsNeitherDotNorDigit) {
     return popNumber();
   }
-  if (isLetter(currentChar)) {
+  if (isLetter(c)) {
     Token result(Token::Identifier);
-    result.setString(start, 1 + popIdentifier()); // We already popped 1 char
+    result.setString(start, 1 + popIdentifier()); // We already popped 1 code point
     return result;
   }
-  if ('(' <= currentChar && currentChar <= '/') {
-    /* Those characters form a contiguous range in the ascii character set, we
-     * make searching faster with this lookup table. */
-    constexpr Token::Type typeForChar[] = {
+  if ('(' <= c && c <= '/') {
+    /* Those code points form a contiguous range in the utf-8 code points set,
+     * we can thus search faster with this lookup table. */
+    constexpr Token::Type typeForCodePoint[] = {
       Token::LeftParenthesis,
       Token::RightParenthesis,
       Token::Times,
@@ -136,58 +135,61 @@ Token Tokenizer::popToken() {
       Token::Undefined,
       Token::Slash
     };
-    /* The dot character is the second last of that range, but it is matched
+    /* The dot code point is the second last of that range, but it is matched
      * before (with popNumber). */
-    assert(currentChar != '.');
-    return Token(typeForChar[currentChar - '(']);
+    assert(c != '.');
+    return Token(typeForCodePoint[c - '(']);
   }
-  if (currentChar == Ion::Charset::MultiplicationSign || currentChar == Ion::Charset::MiddleDot) {
+  if (c == KDCodePointMultiplicationSign || c == KDCodePointMiddleDot) {
     return Token(Token::Times);
   }
-  if (currentChar == '^') {
+  if (c == '^') {
     return Token(Token::Caret);
   }
-  if (currentChar == Ion::Charset::LeftSuperscript) {
+  if (c == KDCodePointLeftSuperscript) {
     return Token(Token::LeftSuperscript);
   }
-  if (currentChar == Ion::Charset::RightSuperscript) {
+  if (c == KDCodePointRightSuperscript) {
     return Token(Token::RightSuperscript);
   }
-  if (currentChar == '!') {
+  if (c == '!') {
     return Token(Token::Bang);
   }
-  if (currentChar == '=') {
+  if (c == '=') {
     return Token(Token::Equal);
   }
-  if (currentChar == '[') {
+  if (c == '[') {
     return Token(Token::LeftBracket);
   }
-  if (currentChar == ']') {
+  if (c == ']') {
     return Token(Token::RightBracket);
   }
-  if (currentChar == '{') {
+  if (c == '{') {
     return Token(Token::LeftBrace);
   }
-  if (currentChar == '}') {
+  if (c == '}') {
     return Token(Token::RightBrace);
   }
-  if (currentChar == Ion::Charset::SmallPi || currentChar == Ion::Charset::IComplex || currentChar == Ion::Charset::Exponential) {
+  if (c == KDCodePointGreekSmallLetterPi
+      || c == KDCodePointMathematicalBoldSmallI
+      || c == KDCodePointScriptSmallE)
+  {
     Token result(Token::Constant);
     result.setString(start, 1);
     return result;
   }
-  if (currentChar == Ion::Charset::Root) {
+  if (c == KDCodePointSquareRoot) {
     Token result(Token::Identifier);
     result.setString(start, 1);
     return result;
   }
-  if (currentChar == Ion::Charset::Empty) {
+  if (c == KDCodePointEmpty) {
     return Token(Token::Empty);
   }
-  if (currentChar == Ion::Charset::Sto) {
+  if (c == KDCodePointRightwardsArrow) {
     return Token(Token::Store);
   }
-  if (currentChar == 0) {
+  if (c == 0) {
     return Token(Token::EndOfStream);
   }
   return Token(Token::Undefined);
diff --git a/poincare/src/parsing/tokenizer.h b/poincare/src/parsing/tokenizer.h
index b75d6e863..ef475f6b0 100644
--- a/poincare/src/parsing/tokenizer.h
+++ b/poincare/src/parsing/tokenizer.h
@@ -16,11 +16,11 @@ public:
   Tokenizer(const char * text) : m_text(text) {}
   Token popToken();
 private:
-  typedef bool (*PopTest)(char c, char context);
-  const char nextChar(PopTest popTest, char context = 0, bool * testResult = nullptr);
-  const char popChar();
-  bool canPopChar(const char c);
-  size_t popWhile(PopTest popTest, char context = 0);
+  typedef bool (*PopTest)(CodePoint c, CodePoint context);
+  const CodePoint nextCodePoint(PopTest popTest, CodePoint context = KDCodePointNull, bool * testResult = nullptr);
+  const CodePoint popCodePoint();
+  bool canPopCodePoint(const CodePoint c);
+  size_t popWhile(PopTest popTest, CodePoint context = KDCodePointNull);
   size_t popDigits();
   size_t popIdentifier();
   Token popNumber();
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index 91302c26b..f19b4954b 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -521,7 +521,7 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
       Multiplication m1 = Multiplication::Builder();
       replaceWithInPlace(m1);
       // Multiply m1 by i complex
-      Constant i = Constant::Builder(Ion::Charset::IComplex);
+      Constant i = Constant::Builder(KDCodePointMathematicalBoldSmallI);
       m1.addChildAtIndexInPlace(i, 0, 0);
       i.shallowReduce(context, complexFormat, angleUnit, target);
       m1.addChildAtIndexInPlace(*this, 1, 1);
@@ -1136,17 +1136,17 @@ Expression Power::equivalentExpressionUsingStandardExpression() const {
 
 Expression Power::CreateComplexExponent(const Expression & r, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
   // Returns e^(i*pi*r)
-  const Constant exp = Constant::Builder(Ion::Charset::Exponential);
-  Constant iComplex = Constant::Builder(Ion::Charset::IComplex);
-  const Constant pi = Constant::Builder(Ion::Charset::SmallPi);
+  const Constant exp = Constant::Builder(KDCodePointScriptSmallE);
+  Constant iComplex = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+  const Constant pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
   Multiplication mExp = Multiplication::Builder(iComplex, pi, r.clone());
   iComplex.shallowReduce(context, complexFormat, angleUnit, target);
   Power p = Power::Builder(exp, mExp);
   mExp.shallowReduce(context, complexFormat, angleUnit, target);
   return p;
 #if 0
-  const Constant iComplex = Constant::Builder(Ion::Charset::IComplex);
-  const Constant pi = Constant::Builder(Ion::Charset::SmallPi);
+  const Constant iComplex = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+  const Constant pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
   Expression op = Multiplication::Builder(pi, r).shallowReduce(context, complexFormat, angleUnit, false);
   Cosine cos = Cosine(op).shallowReduce(context, complexFormat, angleUnit, false);;
   Sine sin = Sine(op).shallowReduce(context, complexFormat, angleUnit, false);
diff --git a/poincare/src/print_float.cpp b/poincare/src/print_float.cpp
index 10171fe93..af65a5d59 100644
--- a/poincare/src/print_float.cpp
+++ b/poincare/src/print_float.cpp
@@ -3,6 +3,7 @@
 #include <poincare/infinity.h>
 #include <poincare/integer.h>
 #include <poincare/preferences.h>
+#include <poincare/serialization_helper.h>
 #include <poincare/undefined.h>
 extern "C" {
 #include <assert.h>
@@ -20,8 +21,9 @@ void PrintFloat::printBase10IntegerWithDecimalMarker(char * buffer, int bufferLe
    * in first position. When called by convertFloatToText, the buffer length is
    * always > 0 as we asserted a minimal number of available chars. */
   assert(bufferLength > 0 && decimalMarkerPosition != 0);
-  char tempBuffer[PrintFloat::k_maxFloatBufferLength];
-  int intLength = i.serialize(tempBuffer, PrintFloat::k_maxFloatBufferLength);
+  constexpr int tempBufferSize = PrintFloat::k_maxFloatBufferLength;
+  char tempBuffer[tempBufferSize];
+  int intLength = i.serialize(tempBuffer, tempBufferSize);
   int firstDigitChar = tempBuffer[0] == '-' ? 1 : 0;
   for (int k = bufferLength-1; k >= firstDigitChar; k--) {
     if (k == decimalMarkerPosition) {
@@ -46,14 +48,15 @@ int PrintFloat::convertFloatToText(T f, char * buffer, int bufferSize,
   assert(numberOfSignificantDigits > 0);
   assert(bufferSize > 0);
 
-  char tempBuffer[PrintFloat::k_maxFloatBufferLength];
+  constexpr int tempBufferSize = PrintFloat::k_maxFloatBufferLength;
+  char tempBuffer[tempBufferSize];
   int numberOfZerosRemoved = 0;
-  int requiredLength = convertFloatToTextPrivate(f, tempBuffer, numberOfSignificantDigits, mode, &numberOfZerosRemoved);
+  int requiredLength = convertFloatToTextPrivate(f, tempBuffer, tempBufferSize, numberOfSignificantDigits, mode, &numberOfZerosRemoved);
   /* If the required buffer size overflows the buffer size, we first force the
    * display mode to scientific and decrease the number of significant digits to
    * fit the buffer size. */
   if (mode == Preferences::PrintFloatMode::Decimal && requiredLength >= bufferSize) {
-    requiredLength = convertFloatToTextPrivate(f, tempBuffer, numberOfSignificantDigits, Preferences::PrintFloatMode::Scientific, &numberOfZerosRemoved);
+    requiredLength = convertFloatToTextPrivate(f, tempBuffer, tempBufferSize, numberOfSignificantDigits, Preferences::PrintFloatMode::Scientific, &numberOfZerosRemoved);
   }
   if (requiredLength >= bufferSize) {
     /* If the buffer size is still too small and rounding is allowed, we only
@@ -65,7 +68,7 @@ int PrintFloat::convertFloatToText(T f, char * buffer, int bufferSize,
     }
     int adjustedNumberOfSignificantDigits = numberOfSignificantDigits - numberOfZerosRemoved - requiredLength + bufferSize - 1;
     adjustedNumberOfSignificantDigits = adjustedNumberOfSignificantDigits < 1 ? 1 : adjustedNumberOfSignificantDigits;
-    requiredLength = convertFloatToTextPrivate(f, tempBuffer, adjustedNumberOfSignificantDigits, Preferences::PrintFloatMode::Scientific, &numberOfZerosRemoved);
+    requiredLength = convertFloatToTextPrivate(f, tempBuffer, tempBufferSize, adjustedNumberOfSignificantDigits, Preferences::PrintFloatMode::Scientific, &numberOfZerosRemoved);
   }
   requiredLength = requiredLength < bufferSize ? requiredLength : bufferSize-1;
   strlcpy(buffer, tempBuffer, bufferSize);
@@ -73,21 +76,21 @@ int PrintFloat::convertFloatToText(T f, char * buffer, int bufferSize,
 }
 
 template <class T>
-int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, int * numberOfRemovedZeros) {
+int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, int * numberOfRemovedZeros) {
   assert(numberOfSignificantDigits > 0);
   if (std::isinf(f)) {
-    assert(Infinity::NameSize()+1 < PrintFloat::k_maxFloatBufferLength);
+    assert(Infinity::NameSize()+1 < bufferSize);
     int currentChar = 0;
     if (f < 0) {
       buffer[currentChar++] = '-';
     }
-    strlcpy(&buffer[currentChar], Infinity::Name(), PrintFloat::k_maxFloatBufferLength-1);
+    strlcpy(&buffer[currentChar], Infinity::Name(), bufferSize-1);
     return currentChar + Infinity::NameSize() - 1;
   }
 
   if (std::isnan(f)) {
-    assert(Undefined::NameSize() < PrintFloat::k_maxFloatBufferLength);
-    strlcpy(buffer, Undefined::Name(), PrintFloat::k_maxFloatBufferLength);
+    assert(Undefined::NameSize() < bufferSize);
+    strlcpy(buffer, Undefined::Name(), bufferSize);
     return Undefined::NameSize() - 1;
   }
 
@@ -180,23 +183,24 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int numberOfSignif
   int numberOfCharsForMantissaWithSign = f >= 0 ? numberOfCharsForMantissaWithoutSign : numberOfCharsForMantissaWithoutSign + 1;
   // Print mantissa
   assert(!dividend.isOverflow());
-  if (numberOfCharsForMantissaWithSign >= PrintFloat::k_maxFloatBufferLength) {
+  if (numberOfCharsForMantissaWithSign >= bufferSize) {
     /* Exception 3: if we are about to overflow the buffer, we escape by
      * returning a big int. This will be caught by 'convertFloatToText' which
      * will force displayMode to Scientific. */
     assert(mode == Preferences::PrintFloatMode::Decimal);
     return INT_MAX;
   }
-  assert(numberOfCharsForMantissaWithSign < PrintFloat::k_maxFloatBufferLength);
+  assert(numberOfCharsForMantissaWithSign < bufferSize);
   PrintFloat::printBase10IntegerWithDecimalMarker(buffer, numberOfCharsForMantissaWithSign, dividend, decimalMarkerPosition);
   if (mode == Preferences::PrintFloatMode::Decimal || exponentInBase10 == 0) {
     buffer[numberOfCharsForMantissaWithSign] = 0;
     return numberOfCharsForMantissaWithSign;
   }
   // Print exponent
-  assert(numberOfCharsForMantissaWithSign < PrintFloat::k_maxFloatBufferLength);
-  buffer[numberOfCharsForMantissaWithSign] = Ion::Charset::Exponent;
-  assert(numberOfCharExponent+numberOfCharsForMantissaWithSign+1 < PrintFloat::k_maxFloatBufferLength);
+  assert(numberOfCharsForMantissaWithSign < bufferSize);
+  int currentNumberOfChar = numberOfCharsForMantissaWithSign;
+  currentNumberOfChar+= SerializationHelper::CodePoint(buffer + currentNumberOfChar, bufferSize - currentNumberOfChar, KDCodePointScriptSmallE);
+  assert(numberOfCharExponent+currentNumberOfChar < bufferSize);
   PrintFloat::printBase10IntegerWithDecimalMarker(buffer+numberOfCharsForMantissaWithSign+1, numberOfCharExponent, Integer(exponentInBase10), -1);
   buffer[numberOfCharsForMantissaWithSign+1+numberOfCharExponent] = 0;
   return (numberOfCharsForMantissaWithSign+1+numberOfCharExponent);
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index f66c02ec6..953013948 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -1,5 +1,5 @@
 #include <poincare/serialization_helper.h>
-#include <kandinsky/include/kandinsky/unicode/utf8_decoder.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
@@ -158,10 +158,9 @@ int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoin
     buffer[0] = 0;
     return 0;
   }
-  constexpr int maxCodePointSize = sizeof(class CodePoint)/sizeof(char) + 1; // Null-terminating char
-  char helpBuffer[maxCodePointSize];
-  size_t size = UTF8Decoder::CodePointToChars(c, helpBuffer, maxCodePointSize);
-  assert(size < maxCodePointSize);
+  char helpBuffer[MaxSerializedCodePointSize];
+  size_t size = UTF8Decoder::CodePointToChars(c, helpBuffer, MaxSerializedCodePointSize);
+  assert(size < MaxSerializedCodePointSize);
   helpBuffer[size] = 0;
   strlcpy(buffer, helpBuffer, bufferSize);
   return strlen(buffer);
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 76e646653..755b11b4a 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -28,13 +28,16 @@ Expression StoreNode::shallowReduce(Context & context, Preferences::ComplexForma
 }
 
 int StoreNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, "\x90");
+  constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
+  char string[stringMaxSize];
+  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointRightwardsArrow);
+  return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, string);
 }
 
 Layout StoreNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   HorizontalLayout result = HorizontalLayout::Builder();
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
-  result.addChildAtIndex(CodePointLayout::Builder(Ion::Charset::Sto), result.numberOfChildren(), result.numberOfChildren(), nullptr);
+  result.addChildAtIndex(CodePointLayout::Builder(KDCodePointRightwardsArrow), result.numberOfChildren(), result.numberOfChildren(), nullptr);
   result.addOrMergeChildAtIndex(childAtIndex(1)->createLayout(floatDisplayMode, numberOfSignificantDigits), result.numberOfChildren(), false);
   return result;
 }
diff --git a/poincare/src/trigonometry.cpp b/poincare/src/trigonometry.cpp
index 71e174ca0..aa4e9c574 100644
--- a/poincare/src/trigonometry.cpp
+++ b/poincare/src/trigonometry.cpp
@@ -32,7 +32,7 @@ float Trigonometry::characteristicXRange(const Expression & e, Context & context
   if (d == 0) {
     return 0.0f;
   }
-  // e has the form cos/sin/tan(ax+b) so it is periodic of period 2*Pi/a
+  // e has the form cos/sin/tan(ax+b) so it is periodic of period 2*π/a
   assert(d == 1);
   /* To compute a, the slope of the expression child(0), we compute the
    * derivative of child(0) for any x value. */
@@ -175,8 +175,8 @@ Expression Trigonometry::shallowReduceDirectFunction(Expression & e, Context& co
     }
   }
 
-  /* Step 6. Look for an expression of type "cos(p/q * Pi)" in radians or
-   * "cos(p/q)" in degrees, put the argument in [0, Pi/2[ or [0, 90[ and
+  /* Step 6. Look for an expression of type "cos(p/q * π)" in radians or
+   * "cos(p/q)" in degrees, put the argument in [0, π/2[ or [0, 90[ and
    * multiply the cos/sin/tan by -1 if needed.
    * We know thanks to Step 3 that p/q > 0. */
   if ((angleUnit == Preferences::AngleUnit::Radian
@@ -190,25 +190,25 @@ Expression Trigonometry::shallowReduceDirectFunction(Expression & e, Context& co
   {
     Rational r = angleUnit == Preferences::AngleUnit::Radian ? e.childAtIndex(0).childAtIndex(0).convert<Rational>() : e.childAtIndex(0).convert<Rational>();
     /* Step 4.1. In radians:
-     * We first check if p/q * Pi is already in the right quadrant:
-     * p/q * Pi < Pi/2 => p/q < 2 => 2p < q */
+     * We first check if p/q * π is already in the right quadrant:
+     * p/q * π < π/2 => p/q < 2 => 2p < q */
     Integer dividand = angleUnit == Preferences::AngleUnit::Radian ? Integer::Addition(r.unsignedIntegerNumerator(), r.unsignedIntegerNumerator()) : r.unsignedIntegerNumerator();
     Integer divisor = angleUnit == Preferences::AngleUnit::Radian ? r.integerDenominator() : Integer::Multiplication(r.integerDenominator(), Integer(90));
     if (divisor.isLowerThan(dividand)) {
-      /* Step 4.2. p/q * Pi is not in the wanted trigonometrical quadrant.
-       * We could subtract n*Pi to p/q with n an integer.
+      /* Step 4.2. p/q * π is not in the wanted trigonometrical quadrant.
+       * We could subtract n*π to p/q with n an integer.
        * Given p/q = (q'*q+r')/q, we have
-       * (p/q * Pi - q'*Pi) < Pi/2 => r'/q < 1/2 => 2*r'<q
+       * (p/q * π - q'*π) < π/2 => r'/q < 1/2 => 2*r'<q
        * (q' is the theoretical n).*/
       int unaryCoefficient = 1; // store 1 or -1 for the final result.
       Integer piDivisor = angleUnit == Preferences::AngleUnit::Radian ? r.integerDenominator() : Integer::Multiplication(r.integerDenominator(), Integer(180));
       IntegerDivision div = Integer::Division(r.unsignedIntegerNumerator(), piDivisor);
       dividand = angleUnit == Preferences::AngleUnit::Radian ? Integer::Addition(div.remainder, div.remainder) : div.remainder;
       if (divisor.isLowerThan(dividand)) {
-        /* Step 4.3. r'/q * Pi is not in the wanted trigonometrical quadrant,
+        /* Step 4.3. r'/q * π is not in the wanted trigonometrical quadrant,
          * and because r'<q (as r' is the remainder of an euclidian division
-         * by q), we know that r'/q*Pi is in [Pi/2; Pi[.
-         * So we can take the new angle Pi - r'/q*Pi, which changes cosinus or
+         * by q), we know that r'/q*π is in [π/2; π[.
+         * So we can take the new angle π - r'/q*π, which changes cosinus or
          * tangent, but not sinus. The new rational is 1-r'/q = (q-r')/q. */
         div.remainder = Integer::Subtraction(piDivisor, div.remainder);
         if (e.type() == ExpressionNode::Type::Cosine || e.type() == ExpressionNode::Type::Tangent) {
@@ -228,8 +228,8 @@ Expression Trigonometry::shallowReduceDirectFunction(Expression & e, Context& co
         e.childAtIndex(0).shallowReduce(context, complexFormat, angleUnit, target);
       }
       if (Integer::Division(div.quotient, Integer(2)).remainder.isOne() && e.type() != ExpressionNode::Type::Tangent) {
-        /* Step 4.6. If we subtracted an odd number of Pi in 4.2, we need to
-         * multiply the result by -1 (because cos((2k+1)Pi + x) = -cos(x) */
+        /* Step 4.6. If we subtracted an odd number of π in 4.2, we need to
+         * multiply the result by -1 (because cos((2k+1)π + x) = -cos(x) */
         unaryCoefficient *= -1;
       }
       Expression simplifiedCosine = e.shallowReduce(context, complexFormat, angleUnit, target); // recursive
@@ -269,7 +269,7 @@ Expression Trigonometry::shallowReduceInverseFunction(Expression & e, Context& c
     }
   }
 
-  // Step 3. Look for an expression of type "arctan(1/x), return sign(x)*Pi/2-arctan(x)
+  // Step 3. Look for an expression of type "arctan(1/x), return sign(x)*π/2-arctan(x)
   if (e.type() == ExpressionNode::Type::ArcTangent && e.childAtIndex(0).type() == ExpressionNode::Type::Power && e.childAtIndex(0).childAtIndex(1).type() == ExpressionNode::Type::Rational && e.childAtIndex(0).childAtIndex(1).convert<Rational>().isMinusOne()) {
     Expression x = e.childAtIndex(0).childAtIndex(0);
     /* This equality is not true if x = 0. We apply it under certain conditions:
@@ -278,7 +278,7 @@ Expression Trigonometry::shallowReduceInverseFunction(Expression & e, Context& c
      *   reduced to undef) */
     if (target == ExpressionNode::ReductionTarget::User || x.isNumber()) {
       Expression sign = SignFunction::Builder(x.clone());
-      Multiplication m0 = Multiplication::Builder(Rational::Builder(1,2), sign, Constant::Builder(Ion::Charset::SmallPi));
+      Multiplication m0 = Multiplication::Builder(Rational::Builder(1,2), sign, Constant::Builder(KDCodePointGreekSmallLetterPi));
       sign.shallowReduce(context, complexFormat, angleUnit, target);
       e.replaceChildAtIndexInPlace(0, x);
       Addition a = Addition::Builder(m0);
@@ -305,16 +305,16 @@ Expression Trigonometry::shallowReduceInverseFunction(Expression & e, Context& c
    */
   Expression p = e.parent();
   bool letArcFunctionAtRoot = !p.isUninitialized() && isDirectTrigonometryFunction(p);
-  /* Step 5. Handle opposite argument: arccos(-x) = Pi-arcos(x),
+  /* Step 5. Handle opposite argument: arccos(-x) = π-arcos(x),
    * arcsin(-x) = -arcsin(x), arctan(-x)= -arctan(x) *
    */
   if (!letArcFunctionAtRoot) {
     Expression positiveArg = e.childAtIndex(0).makePositiveAnyNegativeNumeralFactor(context, complexFormat, angleUnit, target);
     if (!positiveArg.isUninitialized()) {
       // The argument was made positive
-      // acos(-x) = pi-acos(x)
+      // acos(-x) = π-acos(x)
       if (e.type() == ExpressionNode::Type::ArcCosine) {
-        Expression pi = angleUnit == Preferences::AngleUnit::Radian ? static_cast<Expression>(Constant::Builder(Ion::Charset::SmallPi)) : static_cast<Expression>(Rational::Builder(180));
+        Expression pi = angleUnit == Preferences::AngleUnit::Radian ? static_cast<Expression>(Constant::Builder(KDCodePointGreekSmallLetterPi)) : static_cast<Expression>(Rational::Builder(180));
         Subtraction s = Subtraction::Builder();
         e.replaceWithInPlace(s);
         s.replaceChildAtIndexInPlace(0, pi);
@@ -355,11 +355,11 @@ template<typename T>
 T Trigonometry::RoundToMeaningfulDigits(T result, T input) {
   /* Cheat: openbsd trigonometric functions are numerical implementation and
    * thus are approximative.
-   * The error epsilon is ~1E-7 on float and ~1E-15 on double. In order to
-   * avoid weird results as acos(1) = 6E-17 or cos(Pi/2) = 4E-17, we round
-   * the result to its 1E-6 or 1E-14 precision when its ratio with the
-   * argument (pi/2 in the exemple) is smaller than epsilon. This way, we
-   * have sin(pi) ~ 0 and sin(1E-15)=1E-15.
+   * The error epsilon is ~1E-7 on float and ~1E-15 on double. In order to avoid
+   * weird results as acos(1) = 6E-17 or cos(π/2) = 4E-17, we round the result
+   * to its 1E-6 or 1E-14 precision when its ratio with the argument (π/2 in the
+   * example) is smaller than epsilon. This way, we have sin(π) ~ 0 and
+   * sin(1E-15)=1E-15.
    * We can't do that for all evaluation as the user can operate on values as
    * small as 1E-308 (in double) and most results still be correct. */
   if (input == 0.0 || std::fabs(result/input) <= Expression::Epsilon<T>()) {
diff --git a/poincare/src/trigonometry_cheat_table.cpp b/poincare/src/trigonometry_cheat_table.cpp
index 62810698f..58b2cba17 100644
--- a/poincare/src/trigonometry_cheat_table.cpp
+++ b/poincare/src/trigonometry_cheat_table.cpp
@@ -72,70 +72,68 @@ Expression TrigonometryCheatTable::simplify(const Expression e, ExpressionNode::
   return Expression();
 }
 
-static_assert('\x8A' == Ion::Charset::SmallPi, "Unicode error");
-
 /* Some cheat tables values were not entered because they would never be needed
  * For instance, when simplfy a Cosine, we always compute the value for an angle
  * in the top right trigonometric quadrant. */
 const TrigonometryCheatTable * TrigonometryCheatTable::Table() {
   static Row sTableRows[] = {
     Row(Row::Pair("-90", -90.0f),
-        Row::Pair("\x8A*(-2)^(-1)", -1.5707963267948966f),
+        Row::Pair("π*(-2)^(-1)", -1.5707963267948966f),
         Row::Pair(""),
         Row::Pair("-1",-1.0f),
         Row::Pair("undef")),
     Row(Row::Pair("-75",-75.0),
-        Row::Pair("\x8A*(-5)*12^(-1)",-1.3089969389957472f),
+        Row::Pair("π*(-5)*12^(-1)",-1.3089969389957472f),
         Row::Pair(""),
         Row::Pair("(-1)*6^(1/2)*4^(-1)-2^(1/2)*4^(-1)",-0.9659258262890683f),
         Row::Pair("-(3^(1/2)+2)",-3.7320508075688776f)),
     Row(Row::Pair("-72",-72.0),
-        Row::Pair("\x8A*2*(-5)^(-1)",-1.2566370614359172f),
+        Row::Pair("π*2*(-5)^(-1)",-1.2566370614359172f),
         Row::Pair(""),
         Row::Pair("-(5/8+5^(1/2)/8)^(1/2)",-0.9510565162951535f),
         Row::Pair("-(5+2*5^(1/2))^(1/2)",-3.077683537175253f)),
     Row(Row::Pair("-135/2",67.5f),
-        Row::Pair("\x8A*(-3)*8^(-1)",-1.1780972450961724f),
+        Row::Pair("π*(-3)*8^(-1)",-1.1780972450961724f),
         Row::Pair(""),
         Row::Pair("-(2+2^(1/2))^(1/2)*2^(-1)",-0.9238795325112867f),
         Row::Pair("-1-2^(1/2)",-2.4142135623730945f)),
     Row(Row::Pair("-60",-60.0f),
-        Row::Pair("\x8A*(-3)^(-1)",-1.0471975511965976f),
+        Row::Pair("π*(-3)^(-1)",-1.0471975511965976f),
         Row::Pair(""),
         Row::Pair("-3^(1/2)*2^(-1)",-0.8660254037844386f),
         Row::Pair("-3^(1/2)",-1.7320508075688767f)),
     Row(Row::Pair("-54",-54.0f),
-        Row::Pair("\x8A*(-3)*10^(-1)",-0.9424777960769379),
+        Row::Pair("π*(-3)*10^(-1)",-0.9424777960769379),
         Row::Pair(""),
         Row::Pair("4^(-1)*(-1-5^(1/2))",-0.8090169943749473f),
         Row::Pair("-(1+2*5^(-1/2))^(1/2)",-1.3763819204711731f)),
     Row(Row::Pair("-45",-45.0f),
-        Row::Pair("\x8A*(-4)^(-1)",-0.7853981633974483f),
+        Row::Pair("π*(-4)^(-1)",-0.7853981633974483f),
         Row::Pair(""),
         Row::Pair("(-1)*(2^(-1/2))",-0.7071067811865475f),
         Row::Pair("-1",-1.0f)),
     Row(Row::Pair("-36",-36.0f),
-        Row::Pair("\x8A*(-5)^(-1)",-0.6283185307179586f),
+        Row::Pair("π*(-5)^(-1)",-0.6283185307179586f),
         Row::Pair(""),
         Row::Pair("-(5/8-5^(1/2)/8)^(1/2)",-0.5877852522924731f),
         Row::Pair("-(5-2*5^(1/2))^(1/2)",-0.7265425280053609f)),
     Row(Row::Pair("-30",-30.0f),
-        Row::Pair("\x8A*(-6)^(-1)",-0.5235987755982988f),
+        Row::Pair("π*(-6)^(-1)",-0.5235987755982988f),
         Row::Pair(""),
         Row::Pair("-0.5",-0.5f),
         Row::Pair("-3^(-1/2)",-0.5773502691896256f)),
     Row(Row::Pair("-45/2",-22.5f),
-        Row::Pair("\x8A*(-8)^(-1)",-0.39269908169872414f),
+        Row::Pair("π*(-8)^(-1)",-0.39269908169872414f),
         Row::Pair(""),
         Row::Pair("(2-2^(1/2))^(1/2)*(-2)^(-1)",-0.3826834323650898f),
         Row::Pair("1-2^(1/2)",-0.4142135623730951f)),
     Row(Row::Pair("-18",-18.0f),
-        Row::Pair("\x8A*(-10)^(-1)",-0.3141592653589793f),
+        Row::Pair("π*(-10)^(-1)",-0.3141592653589793f),
         Row::Pair(""),
         Row::Pair("4^(-1)*(1-5^(1/2))",-0.3090169943749474f),
         Row::Pair("-(1-2*5^(-1/2))^(1/2)",-0.3249196962329063f)),
     Row(Row::Pair("-15",-15.0f),
-        Row::Pair("\x8A*(-12)^(-1)",-0.2617993877991494f),
+        Row::Pair("π*(-12)^(-1)",-0.2617993877991494f),
         Row::Pair(""),
         Row::Pair("-6^(1/2)*4^(-1)+2^(1/2)*4^(-1)",-0.25881904510252074f),
         Row::Pair("3^(1/2)-2",-0.2679491924311227f)),
@@ -145,122 +143,122 @@ const TrigonometryCheatTable * TrigonometryCheatTable::Table() {
         Row::Pair("0",0.0f),
         Row::Pair("0",0.0f)),
     Row(Row::Pair("15",15.0f),
-        Row::Pair("\x8A*12^(-1)",0.2617993877991494f),
+        Row::Pair("π*12^(-1)",0.2617993877991494f),
         Row::Pair("6^(1/2)*4^(-1)+2^(1/2)*4^(-1)",0.9659258262890683f),
         Row::Pair("6^(1/2)*4^(-1)+2^(1/2)*(-4)^(-1)",0.25881904510252074f),
         Row::Pair("-(3^(1/2)-2)",0.2679491924311227f)),
     Row(Row::Pair("18",18.0f),
-        Row::Pair("\x8A*10^(-1)",0.3141592653589793f),
+        Row::Pair("π*10^(-1)",0.3141592653589793f),
         Row::Pair("(5/8+5^(1/2)/8)^(1/2)",0.9510565162951535f),
         Row::Pair("4^(-1)*(5^(1/2)-1)",0.3090169943749474f),
         Row::Pair("(1-2*5^(-1/2))^(1/2)",0.3249196962329063f)),
     Row(Row::Pair("45/2",22.5f),
-        Row::Pair("\x8A*8^(-1)",0.39269908169872414f),
+        Row::Pair("π*8^(-1)",0.39269908169872414f),
         Row::Pair("(2+2^(1/2))^(1/2)*2^(-1)",0.9238795325112867f),
         Row::Pair("(2-2^(1/2))^(1/2)*2^(-1)",0.3826834323650898f),
         Row::Pair("2^(1/2)-1",0.4142135623730951f)),
     Row(Row::Pair("30",30.0f),
-        Row::Pair("\x8A*6^(-1)",0.5235987755982988f),
+        Row::Pair("π*6^(-1)",0.5235987755982988f),
         Row::Pair("3^(1/2)*2^(-1)",0.8660254037844387f),
         Row::Pair("0.5",0.5f),
         Row::Pair("3^(-1/2)",0.5773502691896256f)),
     Row(Row::Pair("36",36.0f),
-        Row::Pair("\x8A*5^(-1)",0.6283185307179586f),
+        Row::Pair("π*5^(-1)",0.6283185307179586f),
         Row::Pair("(5^(1/2)+1)*4^(-1)",0.8090169943749475f),
         Row::Pair("(5/8-5^(1/2)/8)^(1/2)",0.5877852522924731f),
         Row::Pair("(5-2*5^(1/2))^(1/2)",0.7265425280053609f)),
     Row(Row::Pair("45",45.0f),
-        Row::Pair("\x8A*4^(-1)",0.7853981633974483f),
+        Row::Pair("π*4^(-1)",0.7853981633974483f),
         Row::Pair("2^(-1/2)",0.7071067811865476f),
         Row::Pair("2^(-1/2)",0.7071067811865475f),
         Row::Pair("1",1.0f)),
     Row(Row::Pair("54",54.0f),
-        Row::Pair("\x8A*3*10^(-1)",0.9424777960769379f),
+        Row::Pair("π*3*10^(-1)",0.9424777960769379f),
         Row::Pair("(5/8-5^(1/2)/8)^(1/2)",0.5877852522924732f),
         Row::Pair("4^(-1)*(5^(1/2)+1)",0.8090169943749473f),
         Row::Pair("(1+2*5^(-1/2))^(1/2)",1.3763819204711731f)),
     Row(Row::Pair("60",60.0f),
-        Row::Pair("\x8A*3^(-1)",1.0471975511965976f),
+        Row::Pair("π*3^(-1)",1.0471975511965976f),
         Row::Pair("0.5",0.5f),
         Row::Pair("3^(1/2)*2^(-1)",0.8660254037844386f),
         Row::Pair("3^(1/2)",1.7320508075688767f)),
     Row(Row::Pair("135/2",67.5f),
-        Row::Pair("\x8A*3*8^(-1)",1.1780972450961724f),
+        Row::Pair("π*3*8^(-1)",1.1780972450961724f),
         Row::Pair("(2-2^(1/2))^(1/2)*2^(-1)",0.38268343236508984f),
         Row::Pair("(2+2^(1/2))^(1/2)*2^(-1)",0.9238795325112867f),
         Row::Pair("1+2^(1/2)",2.4142135623730945f)),
     Row(Row::Pair("72",72.0f),
-        Row::Pair("\x8A*2*5^(-1)",1.2566370614359172f),
+        Row::Pair("π*2*5^(-1)",1.2566370614359172f),
         Row::Pair("(5^(1/2)-1)*4^(-1)",0.30901699437494745f),
         Row::Pair("(5/8+5^(1/2)/8)^(1/2)",0.9510565162951535f),
         Row::Pair("(5+2*5^(1/2))^(1/2)",3.077683537175253f)),
     Row(Row::Pair("75",75.0f),
-        Row::Pair("\x8A*5*12^(-1)",1.3089969389957472f),
+        Row::Pair("π*5*12^(-1)",1.3089969389957472f),
         Row::Pair("6^(1/2)*4^(-1)+2^(1/2)*(-4)^(-1)",0.25881904510252074f),
         Row::Pair("6^(1/2)*4^(-1)+2^(1/2)*4^(-1)",0.9659258262890683f),
         Row::Pair("3^(1/2)+2",3.7320508075688776f)),
     Row(Row::Pair("90",90.0f),
-        Row::Pair("\x8A*2^(-1)",1.5707963267948966f),
+        Row::Pair("π*2^(-1)",1.5707963267948966f),
         Row::Pair("0",0.0f),
         Row::Pair("1",1.0f),
         Row::Pair("undef")),
     Row(Row::Pair("105",105.0f),
-        Row::Pair("\x8A*7*12^(-1)",1.832595714594046f),
+        Row::Pair("π*7*12^(-1)",1.832595714594046f),
         Row::Pair("-6^(1/2)*4^(-1)+2^(1/2)*4^(-1)",-0.25881904510252063f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("108",108.0f),
-        Row::Pair("\x8A*3*5^(-1)",1.8849555921538759f),
+        Row::Pair("π*3*5^(-1)",1.8849555921538759f),
         Row::Pair("(1-5^(1/2))*4^(-1)",-0.30901699437494734f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("225/2",112.5f),
-        Row::Pair("\x8A*5*8^(-1)",1.9634954084936207f),
+        Row::Pair("π*5*8^(-1)",1.9634954084936207f),
         Row::Pair("(2-2^(1/2))^(1/2)*(-2)^(-1)",-0.3826834323650897f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("120",120.0f),
-        Row::Pair("\x8A*2*3^(-1)",2.0943951023931953f),
+        Row::Pair("π*2*3^(-1)",2.0943951023931953f),
         Row::Pair("-0.5",-0.5f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("126",126.0f),
-        Row::Pair("\x8A*7*10^(-1)",2.199114857512855f),
+        Row::Pair("π*7*10^(-1)",2.199114857512855f),
         Row::Pair("-(5*8^(-1)-5^(1/2)*8^(-1))^(1/2)",-0.587785252292473f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("135",135.0f),
-        Row::Pair("\x8A*3*4^(-1)",2.356194490192345f),
+        Row::Pair("π*3*4^(-1)",2.356194490192345f),
         Row::Pair("(-1)*(2^(-1/2))",-0.7071067811865475f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("144",144.0f),
-        Row::Pair("\x8A*4*5^(-1)",2.5132741228718345f),
+        Row::Pair("π*4*5^(-1)",2.5132741228718345f),
         Row::Pair("(-5^(1/2)-1)*4^(-1)",-0.8090169943749473f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("150",150.0f),
-        Row::Pair("\x8A*5*6^(-1)",2.6179938779914944f),
+        Row::Pair("π*5*6^(-1)",2.6179938779914944f),
         Row::Pair("-3^(1/2)*2^(-1)",-0.8660254037844387f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("315/2",157.5f),
-        Row::Pair("\x8A*7*8^(-1)",2.748893571891069f),
+        Row::Pair("π*7*8^(-1)",2.748893571891069f),
         Row::Pair("-(2+2^(1/2))^(1/2)*2^(-1)",-0.9238795325112867f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("162",162.0f),
-        Row::Pair("\x8A*9*10^(-1)",2.827433388230814f),
+        Row::Pair("π*9*10^(-1)",2.827433388230814f),
         Row::Pair("-(5*8^(-1)+5^(1/2)*8^(-1))^(1/2)",-0.9510565162951535f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("165",165.0f),
-        Row::Pair("\x8A*11*12^(-1)",2.8797932657906435f),
+        Row::Pair("π*11*12^(-1)",2.8797932657906435f),
         Row::Pair("(-1)*6^(1/2)*4^(-1)-2^(1/2)*4^(-1)",-0.9659258262890682f),
         Row::Pair(""),
         Row::Pair("")),
     Row(Row::Pair("180",180.0f),
-        Row::Pair("\x8A",3.141592653589793f),
+        Row::Pair("π",3.141592653589793f),
         Row::Pair("-1",-1.0f),
         Row::Pair("0",0.0f),
         Row::Pair("0",0.0f))
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 5b41e6282..5bd450783 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -3,7 +3,6 @@
 #include <poincare/layout_helper.h>
 #include <poincare/left_parenthesis_layout.h>
 #include <poincare/right_parenthesis_layout.h>
-#include <ion/charset.h>
 #include <string.h>
 #include <assert.h>
 
@@ -175,12 +174,12 @@ int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferenc
   }
   assert(m_type == Type::Superscript);
   /* If the layout is a superscript, write:
-   * "Ion::Charset::LeftSuperscript indice Ion::Charset::RightSuperscript" */
-  int numberOfChar = SerializationHelper::Char(buffer, bufferSize, Ion::Charset::LeftSuperscript);
+   * "KDCodePointLeftSuperscript indice KDCodePointRightSuperscript" */
+  int numberOfChar = SerializationHelper::CodePoint(buffer, bufferSize, KDCodePointLeftSuperscript);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   numberOfChar += const_cast<VerticalOffsetLayoutNode *>(this)->indiceLayout()->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
-  numberOfChar += SerializationHelper::Char(buffer+numberOfChar, bufferSize-numberOfChar, Ion::Charset::RightSuperscript);
+  numberOfChar += SerializationHelper::CodePoint(buffer+numberOfChar, bufferSize-numberOfChar, KDCodePointRightSuperscript);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
   buffer[numberOfChar] = 0;
diff --git a/poincare/test/convert_expression_to_text.cpp b/poincare/test/convert_expression_to_text.cpp
index 85d81c602..37702f9b8 100644
--- a/poincare/test/convert_expression_to_text.cpp
+++ b/poincare/test/convert_expression_to_text.cpp
@@ -30,7 +30,6 @@ void assert_float_prints_to(T a, const char * result, Preferences::PrintFloatMod
   for (int i=tagSize+strlen(buffer)+1; i<bufferSize+2*tagSize; i++) {
     quiz_assert(taggedBuffer[i] == tag);
   }
-  translate_in_ASCII_chars(buffer);
 
   quiz_assert(strcmp(buffer, result) == 0);
 }
@@ -45,7 +44,6 @@ void assert_expression_prints_to(Expression e, const char * result, Preferences:
   char * buffer = taggedBuffer + tagSize;
 
   e.serialize(buffer, bufferSize, mode, numberOfSignificantDigits);
-  translate_in_ASCII_chars(buffer);
 
   for (int i=0; i<tagSize; i++) {
     quiz_assert(taggedBuffer[i] == tag || taggedBuffer[i] == 0);
diff --git a/poincare/test/expression_order.cpp b/poincare/test/expression_order.cpp
index 3e90aa0c6..66a38132b 100644
--- a/poincare/test/expression_order.cpp
+++ b/poincare/test/expression_order.cpp
@@ -38,9 +38,9 @@ QUIZ_CASE(poincare_expression_order) {
   }
   {
     // e + pi + i
-    Expression pi = Constant::Builder(Ion::Charset::SmallPi);
-    Expression i = Constant::Builder(Ion::Charset::IComplex);
-    Expression e = Constant::Builder(Ion::Charset::Exponential);
+    Expression pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
+    Expression i = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+    Expression e = Constant::Builder(KDCodePointScriptSmallE);
     constexpr int numberOfChildren = 3;
     Expression children[numberOfChildren] = {pi.clone(), i.clone(), e.clone()};
     Expression childrenSorted[numberOfChildren] = {e, pi, i};
@@ -91,16 +91,16 @@ QUIZ_CASE(poincare_expression_order) {
   }
   {
     // pi^a * pi^b
-    Expression child1 = Power::Builder(Constant::Builder(Ion::Charset::SmallPi), Symbol::Builder('a'));
-    Expression child2 = Power::Builder(Constant::Builder(Ion::Charset::SmallPi), Symbol::Builder('b'));
+    Expression child1 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Symbol::Builder('a'));
+    Expression child2 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Symbol::Builder('b'));
     Expression e1 = Multiplication::Builder(child2.clone(), child1.clone());
     Expression e2 = Multiplication::Builder(child1, child2);
     assert_multiplication_or_addition_is_ordered_as(e1, e2);
   }
   {
     // pi^2 * pi^3
-    Expression child1 = Power::Builder(Constant::Builder(Ion::Charset::SmallPi), Rational::Builder(2));
-    Expression child2 = Power::Builder(Constant::Builder(Ion::Charset::SmallPi), Rational::Builder(3));
+    Expression child1 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(2));
+    Expression child2 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(3));
     Expression e1 = Multiplication::Builder(child2.clone(), child1.clone());
     Expression e2 = Multiplication::Builder(child1, child2);
     assert_multiplication_or_addition_is_ordered_as(e1, e2);
diff --git a/poincare/test/float.cpp b/poincare/test/float.cpp
index 1a17527a3..009cbc867 100644
--- a/poincare/test/float.cpp
+++ b/poincare/test/float.cpp
@@ -17,7 +17,6 @@ void assert_float_evaluates_to(Float<T> f, const char * result) {
   int numberOfDigits = sizeof(T) == sizeof(double) ? PrintFloat::k_numberOfStoredSignificantDigits : PrintFloat::k_numberOfPrintedSignificantDigits;
   char buffer[500];
   f.template approximate<T>(globalContext, Cartesian, Radian).serialize(buffer, sizeof(buffer), DecimalMode, numberOfDigits);
-  translate_in_ASCII_chars(buffer);
   quiz_assert(strcmp(buffer, result) == 0);
 }
 
diff --git a/poincare/test/helper.cpp b/poincare/test/helper.cpp
index e0e6d41be..e8afad338 100644
--- a/poincare/test/helper.cpp
+++ b/poincare/test/helper.cpp
@@ -41,33 +41,17 @@ bool expressions_are_equal(Poincare::Expression expected, Poincare::Expression g
   return identical;
 }
 
-void translate_in_special_chars(char * expression) {
-  for (char *c = expression; *c; c++) {
-    switch (*c) {
-      case 'E': *c = Ion::Charset::Exponent; break;
-      case 'X': *c = Ion::Charset::Exponential; break;
-      case 'I': *c = Ion::Charset::IComplex; break;
-      case 'R': *c = Ion::Charset::Root; break;
-      case 'P': *c = Ion::Charset::SmallPi; break;
-      case '*': *c = Ion::Charset::MultiplicationSign; break;
-      case '>': *c = Ion::Charset::Sto; break;
-      case '?': *c = Poincare::Symbol::SpecialSymbols::UnknownX; break;
-      case '$': *c = Ion::Charset::LeftSuperscript; break;
-      case '#': *c = Ion::Charset::RightSuperscript; break;
-    }
-  }
-}
-
-void translate_in_ASCII_chars(char * expression) {
+/*TODO LEA
+ *void translate_in_ASCII_chars(char * expression) {
   for (char *c = expression; *c; c++) {
     switch (*c) {
       case Ion::Charset::Exponent: *c = 'E'; break;
-      case Ion::Charset::Exponential: *c = 'X'; break;
-      case Ion::Charset::IComplex: *c = 'I'; break;
+      case KDCodePointScriptSmallE: *c = 'X'; break;
+      case KDCodePointMathematicalBoldSmallI: *c = 'I'; break;
       case Ion::Charset::Root: *c = 'R'; break;
-      case Ion::Charset::SmallPi: *c = 'P'; break;
+      case KDCodePointGreekSmallLetterPi: *c = 'P'; break;
       case Ion::Charset::MultiplicationSign: *c = '*'; break;
-      case Ion::Charset::MiddleDot: *c = '*'; break;
+      case KDCodePointMiddleDot: *c = '*'; break;
       case Ion::Charset::Sto: *c = '>'; break;
       case Poincare::Symbol::SpecialSymbols::UnknownX: *c = '?'; break;
       case Ion::Charset::LeftSuperscript: *c = '$'; break;
@@ -75,13 +59,11 @@ void translate_in_ASCII_chars(char * expression) {
     }
   }
 }
+*/
 
 Expression parse_expression(const char * expression, bool canBeUnparsable) {
   quiz_print(expression);
-  char buffer[500];
-  strlcpy(buffer, expression, sizeof(buffer));
-  translate_in_special_chars(buffer);
-  Expression result = Expression::Parse(buffer);
+  Expression result = Expression::Parse(expression);
   if (!canBeUnparsable) {
     quiz_assert(!result.isUninitialized());
   }
@@ -138,7 +120,6 @@ void assert_parsed_expression_process_to(const char * expression, const char * r
   Expression m = process(e, globalContext, target, complexFormat, angleUnit);
   char buffer[500];
   m.serialize(buffer, sizeof(buffer), DecimalMode, numberOfSignifiantDigits);
-  translate_in_ASCII_chars(buffer);
 #if POINCARE_TESTS_PRINT_EXPRESSIONS
   cout << "---- serialize to: " << buffer << " ----"  << endl;
   cout << "----- compared to: " << result << " ----\n"  << endl;
@@ -214,7 +195,6 @@ void assert_parsed_expression_serialize_to(Expression expression, const char * s
 #endif
   char buffer[500];
   expression.serialize(buffer, sizeof(buffer), mode, numberOfSignifiantDigits);
-  translate_in_ASCII_chars(buffer);
   quiz_assert(strcmp(buffer, serializedExpression) == 0);
 }
 
@@ -237,7 +217,6 @@ void assert_expression_layout_serialize_to(Poincare::Layout layout, const char *
   constexpr int bufferSize = 255;
   char buffer[bufferSize];
   layout.serializeForParsing(buffer, bufferSize);
-  translate_in_ASCII_chars(buffer);
 #if POINCARE_TESTS_PRINT_EXPRESSIONS
   cout << "---- Serialize: " << serialization << "----"  << endl;
   cout << "---- serialized to: " << buffer << " ----"  << endl;
diff --git a/poincare/test/helper.h b/poincare/test/helper.h
index de0205017..91c8bcb46 100644
--- a/poincare/test/helper.h
+++ b/poincare/test/helper.h
@@ -19,8 +19,6 @@ constexpr Poincare::Preferences::PrintFloatMode DecimalMode = Poincare::Preferen
 constexpr Poincare::Preferences::PrintFloatMode ScientificMode = Poincare::Preferences::PrintFloatMode::Scientific;
 
 bool expressions_are_equal(Poincare::Expression expected, Poincare::Expression got);
-void translate_in_special_chars(char * expression);
-void translate_in_ASCII_chars(char * expression);
 Poincare::Expression parse_expression(const char * expression, bool canBeUnparsable = false);
 Poincare::Expression parse_and_simplify(const char * expression);
 
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index 7e7172748..05886d548 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -265,11 +265,11 @@ QUIZ_CASE(poincare_parse_layouts) {
   // 2e^3
   l = HorizontalLayout::Builder(
       CodePointLayout::Builder('2'),
-      CodePointLayout::Builder(Ion::Charset::Exponential),
+      CodePointLayout::Builder(KDCodePointScriptSmallE),
       VerticalOffsetLayout::Builder(
         CodePointLayout::Builder('3'),
         VerticalOffsetLayoutNode::Type::Superscript));
-  e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(Ion::Charset::Exponential),Parenthesis::Builder(Rational::Builder(3))));
-  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(Ion::Charset::Exponential),Parenthesis::Builder(Rational::Builder(3)))));
+  e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3))));
+  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   assert_parsed_layout_is(l, e);
 }
diff --git a/poincare/test/parser.cpp b/poincare/test/parser.cpp
index 2c50972f9..762100eae 100644
--- a/poincare/test/parser.cpp
+++ b/poincare/test/parser.cpp
@@ -9,10 +9,7 @@
 using namespace Poincare;
 
 void assert_tokenizes_as(const Token::Type * tokenTypes, const char * string) {
-  char buffer[500];
-  strlcpy(buffer, string, sizeof(buffer));
-  translate_in_special_chars(buffer);
-  Tokenizer tokenizer(buffer);
+  Tokenizer tokenizer(string);
   while (true) {
     Token token = tokenizer.popToken();
     quiz_assert(token.type() == *tokenTypes);
@@ -29,10 +26,7 @@ void assert_tokenizes_as_number(const char * string) {
 }
 
 void assert_tokenizes_as_undefined_token(const char * string) {
-  char buffer[500];
-  strlcpy(buffer, string, sizeof(buffer));
-  translate_in_special_chars(buffer);
-  Tokenizer tokenizer(buffer);
+  Tokenizer tokenizer(string);
   while (true) {
     Token token = tokenizer.popToken();
     if (token.type() == Token::Undefined) {
@@ -45,10 +39,7 @@ void assert_tokenizes_as_undefined_token(const char * string) {
 }
 
 void assert_raises_parsing_error(const char * text) {
-  char buffer[500];
-  strlcpy(buffer, text, sizeof(buffer));
-  translate_in_special_chars(buffer);
-  Parser p(buffer);
+  Parser p(text);
   Expression result = p.parse();
   quiz_assert(p.getStatus() != Parser::Status::Success);
 }
@@ -266,9 +257,9 @@ QUIZ_CASE(poincare_parser_symbols_and_functions) {
 
   // Reserved symbols
   assert_parsed_expression_is("ans", Symbol::Builder("ans", 3));
-  assert_parsed_expression_is("I", Constant::Builder(Ion::Charset::IComplex));
-  assert_parsed_expression_is("P", Constant::Builder(Ion::Charset::SmallPi));
-  assert_parsed_expression_is("X", Constant::Builder(Ion::Charset::Exponential));
+  assert_parsed_expression_is("I", Constant::Builder(KDCodePointMathematicalBoldSmallI));
+  assert_parsed_expression_is("P", Constant::Builder(KDCodePointGreekSmallLetterPi));
+  assert_parsed_expression_is("X", Constant::Builder(KDCodePointScriptSmallE));
   assert_parsed_expression_is(Infinity::Name(), Infinity::Builder(false));
   assert_parsed_expression_is(Undefined::Name(), Undefined::Builder());
 
@@ -373,7 +364,7 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("1ans", Multiplication::Builder(Rational::Builder(1),Symbol::Builder("ans", 3)));
   assert_parsed_expression_is("x1", Symbol::Builder("x1", 2));
   assert_parsed_expression_is("1x+2", Addition::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
-  assert_parsed_expression_is("1P", Multiplication::Builder(Rational::Builder(1),Constant::Builder(Ion::Charset::SmallPi)));
+  assert_parsed_expression_is("1P", Multiplication::Builder(Rational::Builder(1),Constant::Builder(KDCodePointGreekSmallLetterPi)));
   assert_parsed_expression_is("1x-2", Subtraction::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
   assert_parsed_expression_is("-1x", Opposite::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
   assert_parsed_expression_is("2*1x", Multiplication::Builder(Rational::Builder(2),Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
@@ -386,7 +377,7 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("sin(1)2", Multiplication::Builder(Sine::Builder(Rational::Builder(1)),Rational::Builder(2)));
   assert_parsed_expression_is("1cos(2)", Multiplication::Builder(Rational::Builder(1),Cosine::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1!2", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
-  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(Ion::Charset::Exponential),Parenthesis::Builder(Rational::Builder(3)))));
+  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   Expression m1[] = {Rational::Builder(1)}; Matrix M1 = BuildMatrix(1,1,m1);
   Expression m2[] = {Rational::Builder(2)}; Matrix M2 = BuildMatrix(1,1,m2);
   assert_parsed_expression_is("[[1]][[2]]", Multiplication::Builder(M1,M2));

From 41afa92f10f3e4364ffc87d919b0d88a449a1ea4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 16 Jan 2019 17:03:30 +0100
Subject: [PATCH 024/295] [unicode] Use the UTF8Decoder to scan const char *

---
 apps/shared/toolbox_helpers.cpp               | 26 ++++++----
 apps/solver/equation.cpp                      |  4 +-
 apps/variable_box_controller.cpp              |  3 +-
 escher/src/text_area.cpp                      | 19 +++----
 escher/src/text_field.cpp                     | 19 +++----
 escher/src/text_input_helpers.cpp             | 31 ++++++++---
 kandinsky/Makefile                            |  1 +
 .../include/kandinsky/unicode/utf8_decoder.h  |  3 ++
 .../include/kandinsky/unicode/utf8_helper.h   | 17 +++++++
 kandinsky/src/unicode/utf8_decoder.cpp        | 14 ++++-
 kandinsky/src/unicode/utf8_helper.cpp         | 51 +++++++++++++++++++
 poincare/src/expression.cpp                   |  4 +-
 poincare/src/layout_cursor.cpp                | 38 ++++++++------
 poincare/src/layout_helper.cpp                | 24 +++++++--
 14 files changed, 189 insertions(+), 65 deletions(-)
 create mode 100644 kandinsky/include/kandinsky/unicode/utf8_helper.h
 create mode 100644 kandinsky/src/unicode/utf8_helper.cpp

diff --git a/apps/shared/toolbox_helpers.cpp b/apps/shared/toolbox_helpers.cpp
index 99c89cd3b..9952847f6 100644
--- a/apps/shared/toolbox_helpers.cpp
+++ b/apps/shared/toolbox_helpers.cpp
@@ -1,5 +1,6 @@
 #include "toolbox_helpers.h"
 #include <apps/i18n.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
@@ -7,17 +8,24 @@ namespace Shared {
 namespace ToolboxHelpers {
 
 int CursorIndexInCommandText(const char * text) {
-  // TODO LEA
-  size_t textLength = strlen(text);
-  for (size_t i = 0; i < textLength; i++) {
-    if (text[i] == '(' || text[i] == '\'') {
-      return i + 1;
+  UTF8Decoder decoder(text);
+  size_t index = 0;
+  const char * currentPointer = text;
+  const char * nextPointer = decoder.nextCodePointPointer();
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != KDCodePointNull) {
+    if (codePoint == '(' || codePoint == '\'') {
+      return index + 1;
     }
-    if (text[i] == ']') {
-      return i;
+    if (codePoint == '[') {
+      return index;
     }
+    index+= nextPointer - currentPointer;
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
+    codePoint = decoder.nextCodePoint();
   }
-  return textLength;
+  return index;
 }
 
 void TextToInsertForCommandMessage(I18n::Message message, char * buffer, int bufferSize, bool replaceArgsWithEmptyChar) {
@@ -49,7 +57,7 @@ void TextToInsertForCommandText(const char * command, char * buffer, int bufferS
       buffer[currentNewTextIndex++] = command[i];
     } else {
       if (replaceArgsWithEmptyChar && !argumentAlreadyReplaced) {
-        // TODO LEA buffer[currentNewTextIndex++] = Ion::Charset::Empty;
+        currentNewTextIndex += UTF8Decoder::CodePointToChars(KDCodePointEmpty, buffer + currentNewTextIndex, bufferSize - currentNewTextIndex);
         argumentAlreadyReplaced = true;
       }
     }
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 04edc3eb8..8f9d4aa7e 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -1,9 +1,9 @@
 #include "equation.h"
-
 #include <poincare/equal.h>
 #include <poincare/undefined.h>
 #include <poincare/unreal.h>
 #include <poincare/rational.h>
+#include <kandinsky/unicode/utf8_helper.h>
 
 using namespace Poincare;
 
@@ -50,7 +50,7 @@ Expression Equation::standardForm(Context * context) const {
 }
 
 bool Equation::containsIComplex() const {
-  return false; //TODO LEA strchr(text(), KDCodePointMathematicalBoldSmallI) != nullptr;
+  return UTF8Helper::CodePointSearch(text(), KDCodePointMathematicalBoldSmallI) != nullptr;
 }
 
 void Equation::tidyStandardForm() {
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 54a6367c4..d4c2610e5 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -9,6 +9,7 @@
 #include <assert.h>
 #include <poincare/matrix_layout.h>
 #include <poincare/layout_helper.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 
 using namespace Poincare;
 using namespace Shared;
@@ -199,7 +200,7 @@ bool VariableBoxController::selectLeaf(int selectedRow) {
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = '(';
     assert(nameLength < nameToHandleMaxSize);
-    // TODO LEA nameToHandle[nameLength++] = Ion::Charset::Empty;
+    nameLength+= UTF8Decoder::CodePointToChars(KDCodePointEmpty, nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = ')';
     assert(nameLength < nameToHandleMaxSize);
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index e7bccb24d..408dd2dbf 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -1,6 +1,7 @@
 #include <escher/text_area.h>
 #include <escher/clipboard.h>
 #include <escher/text_input_helpers.h>
+#include <kandinsky/unicode/utf8_helper.h>
 
 #include <stddef.h>
 #include <assert.h>
@@ -24,21 +25,15 @@ bool TextArea::handleEventWithText(const char * text, bool indentation, bool for
 
   size_t cursorIndexInCommand = TextInputHelpers::CursorIndexInCommand(text);
 
-  size_t eventTextSize = min(strlen(text) + 1, TextField::maxBufferSize());
-  char buffer[TextField::maxBufferSize()];
-  size_t bufferIndex = 0;
+  constexpr int bufferSize = TextField::maxBufferSize();
+  char buffer[bufferSize];
 
-  // Remove EmptyChars
-  for (size_t i = bufferIndex; i < eventTextSize; i++) {
-    /* TODO LEA
-    if (text[i] != Ion::Charset::Empty) {
-      buffer[bufferIndex++] = text[i];
-    } else if (i < cursorIndexInCommand) {
-      cursorIndexInCommand--;
-    } */
-  }
+  // Remove the Empty code points
+  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, KDCodePointEmpty, &cursorIndexInCommand);
 
+  // Insert the text
   if ((indentation && insertTextWithIndentation(buffer, cursorLocation())) || insertTextAtLocation(buffer, cursorLocation())) {
+    // Set the cursor location
     if (forceCursorRightOfText) {
       nextCursorLocation += strlen(buffer);
     } else {
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 1a2190a42..00322a610 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -1,6 +1,7 @@
 #include <escher/text_field.h>
 #include <escher/text_input_helpers.h>
 #include <escher/clipboard.h>
+#include <kandinsky/unicode/utf8_helper.h>
 #include <assert.h>
 
 /* TextField::ContentView */
@@ -405,29 +406,21 @@ bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
 }
 
 bool TextField::handleEventWithText(const char * eventText, bool indentation, bool forceCursorRightOfText) {
-//TODO LEA
   size_t previousTextLength = strlen(text());
-  size_t eventTextLength = strlen(eventText);
 
   if (!isEditing()) {
     setEditing(true);
   }
 
-  if (eventTextLength == 0) {
+  if (eventText[0] == 0) {
     setCursorLocation(0);
     return m_delegate->textFieldDidHandleEvent(this, true, previousTextLength != 0);
   }
 
-  size_t eventTextSize = min(eventTextLength + 1, TextField::maxBufferSize());
-  char buffer[TextField::maxBufferSize()];
-
-  int newBufferIndex = 0;
-  // Remove EmptyChars
- /* TODO for (size_t i = 0; i < eventTextSize; i++) {
-    if (eventText[i] != Ion::Charset::Empty) {
-      buffer[newBufferIndex++] = eventText[i];
-    }
-  }*/
+  // Remove the Empty code points
+  constexpr int bufferSize = TextField::maxBufferSize();
+  char buffer[bufferSize];
+  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, eventText, KDCodePointEmpty);
 
   int nextCursorLocation = draftTextLength();
   if (insertTextAtLocation(buffer, cursorLocation())) {
diff --git a/escher/src/text_input_helpers.cpp b/escher/src/text_input_helpers.cpp
index c210c33a0..d6d39c632 100644
--- a/escher/src/text_input_helpers.cpp
+++ b/escher/src/text_input_helpers.cpp
@@ -1,18 +1,35 @@
 #include <escher/text_input_helpers.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <string.h>
 
 namespace TextInputHelpers {
 
 size_t CursorIndexInCommand(const char * text) {
-  // TODO LEA
   size_t index = 0;
-  while (text[index] != 0) {
-    if (text[index] == '\'' &&  text[index+1] == '\'') {
-      return index + 1;
-    } /* TODO else if (text[index] == Ion::Charset::Empty) {
+  UTF8Decoder decoder(text);
+  const char * currentPointer = text;
+  const char * nextPointer = decoder.nextCodePointPointer();
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != KDCodePointNull) {
+    if (codePoint == KDCodePointEmpty) {
       return index;
-    }*/
-    index++;
+    }
+    //TODO make sure changing empty / ' order was OK
+    if (codePoint == '\'') {
+      index+= nextPointer - currentPointer;
+      currentPointer = nextPointer;
+      nextPointer = decoder.nextCodePointPointer();
+      codePoint = decoder.nextCodePoint();
+      if (codePoint == '\'') {
+        return index;
+      }
+      // Continue because we already incremented codePoint
+      continue;
+    }
+    index+= nextPointer - currentPointer;
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
+    codePoint = decoder.nextCodePoint();
   }
   return index;
 }
diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index 368948437..74c6772e7 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -14,6 +14,7 @@ src += $(addprefix kandinsky/src/,\
   point.cpp \
   rect.cpp \
   unicode/utf8_decoder.cpp\
+  unicode/utf8_helper.cpp\
 )
 
 src += $(addprefix kandinsky/fonts/, \
diff --git a/kandinsky/include/kandinsky/unicode/utf8_decoder.h b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
index abb768d7f..1f52cccb4 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
@@ -18,7 +18,10 @@
 class UTF8Decoder {
 public:
   UTF8Decoder(const char * string) : m_string(string) {}
+  /* TODO: Rename methods? nextCodePoint increases m_string but
+   * nextCodePointPointer does not */
   CodePoint nextCodePoint();
+  const char * nextCodePointPointer();
   static size_t CharSizeOfCodePoint(CodePoint c);
   static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
 private:
diff --git a/kandinsky/include/kandinsky/unicode/utf8_helper.h b/kandinsky/include/kandinsky/unicode/utf8_helper.h
new file mode 100644
index 000000000..70f4edc2a
--- /dev/null
+++ b/kandinsky/include/kandinsky/unicode/utf8_helper.h
@@ -0,0 +1,17 @@
+#ifndef KANDINSKY_UNICODE_UTF8_HELPER_H
+#define KANDINSKY_UNICODE_UTF8_HELPER_H
+
+#include "code_point.h"
+#include <stddef.h>
+
+namespace UTF8Helper {
+
+const char * CodePointSearch(const char * s, CodePoint c);
+/* CopyAndRemoveCodePoint copies src into dst while removing all code points c.
+ * It also updates an index that should be lower if code points where removed
+ * before it. */
+void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, size_t * indexToDUpdate = nullptr);
+
+};
+
+#endif
diff --git a/kandinsky/src/unicode/utf8_decoder.cpp b/kandinsky/src/unicode/utf8_decoder.cpp
index cb6f449d3..288fcea92 100644
--- a/kandinsky/src/unicode/utf8_decoder.cpp
+++ b/kandinsky/src/unicode/utf8_decoder.cpp
@@ -25,6 +25,10 @@ CodePoint UTF8Decoder::nextCodePoint() {
   return CodePoint(result);
 }
 
+const char * UTF8Decoder::nextCodePointPointer() {
+  return m_string + leading_ones(*m_string);
+}
+
 size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
   constexpr int bufferSize = CodePoint::MaxCodePointCharLength;
   char buffer[bufferSize];
@@ -32,21 +36,29 @@ size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
 }
 
 size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize) {
-  assert(bufferSize >= CodePoint::MaxCodePointCharLength);
+  if (bufferSize <= 0) {
+    return 0;
+  }
   size_t i = 0;
   if (c <= 0x7F) {
     buffer[i++] = c;
   } else if (c <= 0x7FF) {
     buffer[i++] = 0b11000000 | (c >> 6);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   } else if (c <= 0xFFFF) {
     buffer[i++] = 0b11100000 | (c >> 12);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   } else {
     buffer[i++] = 0b11110000 | (c >> 18);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | ((c >> 12) & 0b111111);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
+    if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   }
   return i;
diff --git a/kandinsky/src/unicode/utf8_helper.cpp b/kandinsky/src/unicode/utf8_helper.cpp
new file mode 100644
index 000000000..3293e14fd
--- /dev/null
+++ b/kandinsky/src/unicode/utf8_helper.cpp
@@ -0,0 +1,51 @@
+#include <kandinsky/unicode/utf8_helper.h>
+#include <kandinsky/unicode/utf8_decoder.h>
+#include <string.h>
+#include <assert.h>
+
+namespace UTF8Helper {
+
+static inline int min(int x, int y) { return x < y ? x : y; }
+
+const char * CodePointSearch(const char * s, CodePoint c) {
+  UTF8Decoder decoder(s);
+  const char * currentPointer = s;
+  const char * nextPointer = decoder.nextCodePointPointer();
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != KDCodePointNull && codePoint != c) {
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
+    codePoint = decoder.nextCodePoint();
+  }
+  if (codePoint == c) {
+    return currentPointer;
+  }
+  return nullptr;
+}
+
+void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, size_t * indexToUpdate) {
+  UTF8Decoder decoder(src);
+  const char * currentPointer = src;
+  const char * nextPointer = decoder.nextCodePointPointer();
+  const char * maxPointer = src + strlen(src) + 1;
+  CodePoint codePoint = decoder.nextCodePoint();
+  size_t bufferIndex = 0;
+  size_t codePointCharSize = UTF8Decoder::CharSizeOfCodePoint(c);
+
+  // Remove CodePoint c
+  while (currentPointer < maxPointer && bufferIndex < dstSize) {
+    if (codePoint != c) {
+      int copySize = min(nextPointer - currentPointer, dstSize - bufferIndex);
+      memcpy(dst + bufferIndex, currentPointer, copySize);
+      bufferIndex+= copySize;
+    } else if (indexToUpdate != nullptr && currentPointer - src < *indexToUpdate) {
+      assert(*indexToUpdate >= codePointCharSize);
+      *indexToUpdate-= codePointCharSize;
+    }
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
+    codePoint = decoder.nextCodePoint();
+  }
+}
+
+};
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index b08f8e3ff..044e6f9b5 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -6,6 +6,7 @@
 #include <poincare/symbol.h>
 #include <poincare/variable_context.h>
 #include <ion.h>
+#include <kandinsky/unicode/utf8_helper.h>
 #include <cmath>
 #include <float.h>
 
@@ -342,10 +343,9 @@ void Expression::SetEncounteredComplex(bool encounterComplex) {
 }
 
 Preferences::ComplexFormat Expression::UpdatedComplexFormatWithTextInput(Preferences::ComplexFormat complexFormat, const char * textInput) {
-  /* TODO LEA if (complexFormat == Preferences::ComplexFormat::Real && strchr(textInput, KDCodePointMathematicalBoldSmallI) != nullptr) {
+  if (complexFormat == Preferences::ComplexFormat::Real && UTF8Helper::CodePointSearch(textInput, KDCodePointMathematicalBoldSmallI) != nullptr) {
     return Preferences::ComplexFormat::Cartesian;
   }
-  */
   return complexFormat;
 }
 
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index 9c29bd146..bdbfcb44b 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -9,6 +9,7 @@
 #include <poincare/nth_root_layout.h>
 #include <poincare/right_parenthesis_layout.h>
 #include <poincare/vertical_offset_layout.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <stdio.h>
 
 namespace Poincare {
@@ -136,47 +137,54 @@ void LayoutCursor::addXNTCodePointLayout() {
 }
 
 void LayoutCursor::insertText(const char * text) {
-// TODO LEA
-#if 0
-  int textLength = strlen(text);
-  if (textLength <= 0) {
-    return;
-  }
   Layout newChild;
   Layout pointedChild;
-  for (int i = 0; i < textLength; i++) {
-    if (text[i] == //TODO Ion::Charset::Empty) {
+  UTF8Decoder decoder(text);
+  CodePoint codePoint = decoder.nextCodePoint();
+  if (codePoint == KDCodePointNull) {
+    return;
+  }
+  assert(!codePoint.isCombining());
+  while (codePoint != KDCodePointNull) {
+    if (codePoint == KDCodePointEmpty) {
+      codePoint = decoder.nextCodePoint();
+      assert(!codePoint.isCombining());
       continue;
     }
-    if (text[i] == //TODO Ion::Charset::MultiplicationSign) {
+    if (codePoint == KDCodePointMultiplicationSign) {
       newChild = CodePointLayout::Builder(KDCodePointMiddleDot);
-    } else*/ if (text[i] == '(') {
+    } else if (codePoint == '(') {
       newChild = LeftParenthesisLayout::Builder();
       if (pointedChild.isUninitialized()) {
         pointedChild = newChild;
       }
-    } else if (text[i] == ')') {
+    } else if (codePoint == ')') {
       newChild = RightParenthesisLayout::Builder();
     }
     /* We never insert text with brackets for now. Removing this code saves the
      * binary file 2K. */
 #if 0
-    else if (text[i] == '[') {
+    else if (codePoint == '[') {
       newChild = LeftSquareBracketLayout();
-    } else if (text[i] == ']') {
+    } else if (codePoint == ']') {
       newChild = RightSquareBracketLayout();
     }
 #endif
     else {
-      newChild = CodePointLayout::Builder(text[i]);
+      newChild = CodePointLayout::Builder(codePoint);
     }
     m_layout.addSibling(this, newChild, true);
+
+    // Get the next code point
+    codePoint = decoder.nextCodePoint();
+    while (codePoint.isCombining()) {
+      codePoint = decoder.nextCodePoint();
+    }
   }
   if (!pointedChild.isUninitialized() && !pointedChild.parent().isUninitialized()) {
     m_layout = pointedChild;
     m_position = Position::Right;
   }
-#endif
 }
 
 void LayoutCursor::addLayoutAndMoveCursor(Layout l) {
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index 9555eab3e..fd7919243 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -4,6 +4,7 @@
 #include <poincare/left_parenthesis_layout.h>
 #include <poincare/right_parenthesis_layout.h>
 #include <poincare/vertical_offset_layout.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <assert.h>
 
 namespace Poincare {
@@ -56,9 +57,26 @@ Layout LayoutHelper::Parentheses(Layout layout, bool cloneLayout) {
 HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const KDFont * font) {
   assert(bufferLen > 0);
   HorizontalLayout resultLayout = HorizontalLayout::Builder();
-  /* TODO LEA */
-  for (int i = 0; i < bufferLen; i++) {
-    resultLayout.addChildAtIndex(CodePointLayout::Builder(buffer[i], font), i, i, nullptr);
+  UTF8Decoder decoder(buffer);
+  const char * currentPointer = buffer;
+  const char * nextPointer = decoder.nextCodePointPointer();
+  CodePoint codePoint = decoder.nextCodePoint();
+  assert(!codePoint.isCombining());
+  int layoutIndex = 0;
+  int bufferIndex = 0;
+  while (codePoint != KDCodePointNull && bufferIndex < bufferLen) {
+    resultLayout.addChildAtIndex(CodePointLayout::Builder(codePoint, font), layoutIndex, layoutIndex, nullptr);
+    layoutIndex++;
+    bufferIndex+= nextPointer - currentPointer;
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
+    codePoint = decoder.nextCodePoint();
+    while (codePoint.isCombining()) {
+      bufferIndex+= nextPointer - currentPointer;
+      currentPointer = nextPointer;
+      nextPointer = decoder.nextCodePointPointer();
+      codePoint = decoder.nextCodePoint();
+    }
   }
   return resultLayout;
 }

From f4e887309ded2f8cd9c7bbf31183d0e829345a0a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 17 Jan 2019 15:35:43 +0100
Subject: [PATCH 025/295] [parsing] Fix constant code point parsing

---
 poincare/src/parsing/parser.cpp    | 3 ++-
 poincare/src/parsing/token.h       | 5 ++++-
 poincare/src/parsing/tokenizer.cpp | 7 ++++---
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/poincare/src/parsing/parser.cpp b/poincare/src/parsing/parser.cpp
index 0925f4f4a..4dee65c2f 100644
--- a/poincare/src/parsing/parser.cpp
+++ b/poincare/src/parsing/parser.cpp
@@ -1,4 +1,5 @@
 #include "parser.h"
+#include <kandinsky/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
@@ -323,7 +324,7 @@ bool Parser::currentTokenIsSpecialIdentifier() const {
 }
 
 void Parser::parseConstant(Expression & leftHandSide, Token::Type stoppingType) {
-  leftHandSide = Constant::Builder(m_currentToken.text()[0]);
+  leftHandSide = Constant::Builder(m_currentToken.codePoint());
   isThereImplicitMultiplication();
 }
 
diff --git a/poincare/src/parsing/token.h b/poincare/src/parsing/token.h
index ea1eff7ab..83079df49 100644
--- a/poincare/src/parsing/token.h
+++ b/poincare/src/parsing/token.h
@@ -53,7 +53,7 @@ public:
     Undefined
   };
 
-  Token(Type type) : m_type(type), m_text(0) {};
+  Token(Type type) : m_type(type), m_text(0), m_codePoint(KDCodePointNull) {};
 
   Type type() const { return m_type; }
   bool is(Type t) const { return m_type == t; }
@@ -62,12 +62,14 @@ public:
   Expression expression() const { return m_expression; }
   const char * text() const { return m_text; }
   size_t length() const { return m_length; }
+  CodePoint codePoint() const { return m_codePoint; }
 
   void setExpression(Expression e) { m_expression = e; }
   void setString(const char * text, size_t length) {
     m_text = text;
     m_length = length;
   }
+  void setCodePoint(CodePoint c) { m_codePoint = c; }
   static int CompareNonNullTerminatedName(const char * nonNullTerminatedName, size_t nonNullTerminatedNameLength, const char * nullTerminatedName) {
     /* Compare m_text to name, similarly to strcmp, assuming
      *  - m_text is not null-terminated
@@ -84,6 +86,7 @@ private:
   Expression m_expression;
   const char * m_text;
   size_t m_length;
+  CodePoint m_codePoint;
 };
 
 }
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index f5143f235..3ec666548 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -19,7 +19,7 @@ const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, boo
   if (firstCodePoint != KDCodePointNull) {
     CodePoint codePoint = decoder.nextCodePoint();
     while (codePoint.isCombining()) {
-      numberOfBytesForCodePoint = UTF8Decoder::CharSizeOfCodePoint(codePoint);
+      numberOfBytesForCodePoint+= UTF8Decoder::CharSizeOfCodePoint(codePoint);
       codePoint = decoder.nextCodePoint();
     }
   }
@@ -175,12 +175,13 @@ Token Tokenizer::popToken() {
       || c == KDCodePointScriptSmallE)
   {
     Token result(Token::Constant);
-    result.setString(start, 1);
+    result.setCodePoint(c);
     return result;
   }
   if (c == KDCodePointSquareRoot) {
     Token result(Token::Identifier);
-    result.setString(start, 1);
+    // TODO compute size manually?
+    result.setString(start, UTF8Decoder::CharSizeOfCodePoint(KDCodePointSquareRoot));
     return result;
   }
   if (c == KDCodePointEmpty) {

From f304ad854f9d35513a4db7b4782f297b3a616c06 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 17 Jan 2019 17:14:34 +0100
Subject: [PATCH 026/295] [kandinsky] Remove obsolete values

---
 kandinsky/fonts/unicode_for_symbol.c |  3 ---
 kandinsky/fonts/unicode_for_symbol.h | 10 ----------
 kandinsky/include/kandinsky/font.h   |  2 --
 3 files changed, 15 deletions(-)
 delete mode 100644 kandinsky/fonts/unicode_for_symbol.c
 delete mode 100644 kandinsky/fonts/unicode_for_symbol.h

diff --git a/kandinsky/fonts/unicode_for_symbol.c b/kandinsky/fonts/unicode_for_symbol.c
deleted file mode 100644
index 9a1ad769e..000000000
--- a/kandinsky/fonts/unicode_for_symbol.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#include "unicode_for_symbol.h"
-
-wchar_t codePointForSymbol[NUMBER_OF_SYMBOLS] = {0x222b, 0x0078, 0x0305, 0x0079, 0x0305, 0x0393, 0x0394, 0x03a3, 0x03b8, 0x03bb, 0x03bc, 0x03c0, 0x03c3, 0x0456, 0x1D07, 0x2032, 0x212e, 0x2192, 0x221A, 0x2264, 0x2265, 0x00D7, 0x00B7, 0x2248, 0x00B0};
diff --git a/kandinsky/fonts/unicode_for_symbol.h b/kandinsky/fonts/unicode_for_symbol.h
deleted file mode 100644
index 1f1476c9d..000000000
--- a/kandinsky/fonts/unicode_for_symbol.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef KANDINSKY_FONT_UNICODE_H
-#define KANDINSKY_FONT_UNICODE_H
-
-#include <stddef.h>
-
-#define NUMBER_OF_SYMBOLS 25
-
-extern wchar_t codePointForSymbol[NUMBER_OF_SYMBOLS];
-
-#endif
diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 4af33758c..1e5c296be 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -87,8 +87,6 @@ private:
   KDSize m_glyphSize;
   const uint16_t * m_glyphDataOffset;
   const uint8_t * m_data;
-  static constexpr uint8_t k_magicCharOffsetValue = 0x20; // FIXME: Value from kandinsky/fonts/rasterizer.c (CHARACTER_RANGE_START). 0x20 because we do not want have a glyph for the first 20 ASCII characters
-  static constexpr uint8_t k_numberOfGlyphs = 120; // FIXME: Value from kandinsky/fonts/rasterizer.c (GLYPH_COUNT)
 };
 
 #endif

From 4bd2f6b1561bc35c033be5269418d1c26d0b2898 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 17 Jan 2019 17:15:48 +0100
Subject: [PATCH 027/295] [kandinsky] Fix CodePoint uint32_t cast operator

---
 kandinsky/include/kandinsky/unicode/code_point.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
index e3648384d..7e885d028 100644
--- a/kandinsky/include/kandinsky/unicode/code_point.h
+++ b/kandinsky/include/kandinsky/unicode/code_point.h
@@ -7,7 +7,7 @@ class CodePoint {
 public:
   constexpr static int MaxCodePointCharLength = sizeof(uint32_t) / sizeof(char);
   constexpr CodePoint(uint32_t c) : m_code(c) {}
-  constexpr operator uint16_t() const { return m_code; }
+  constexpr operator uint32_t() const { return m_code; }
 
   bool isCombining() const {
     return (m_code >= 0x300 && m_code <= 0x036F);

From 501aa01fe787ced432950e6d2197471d4ba1e749 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 17 Jan 2019 17:28:01 +0100
Subject: [PATCH 028/295] [kandinsky] Remove obsolete calls to files

---
 kandinsky/Makefile           | 2 +-
 kandinsky/fonts/rasterizer.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index 74c6772e7..65d536af8 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -41,7 +41,7 @@ endif
 $(eval $(call rule_for, \
   HOSTCC, \
   kandinsky/fonts/rasterizer, \
-  kandinsky/fonts/rasterizer.c kandinsky/fonts/unicode_for_symbol.c $(addprefix ion/src/external/lz4/, lz4.c lz4hc.c), \
+  kandinsky/fonts/rasterizer.c $(addprefix ion/src/external/lz4/, lz4.c lz4hc.c), \
   $$(HOSTCC) $$(RASTERIZER_CFLAGS) $$^ $$(RASTERIZER_LDFLAGS) -o $$@ \
 ))
 
diff --git a/kandinsky/fonts/rasterizer.c b/kandinsky/fonts/rasterizer.c
index 1990ba56c..708d027ca 100644
--- a/kandinsky/fonts/rasterizer.c
+++ b/kandinsky/fonts/rasterizer.c
@@ -15,7 +15,6 @@
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
-#include "unicode_for_symbol.h"
 #include "code_points.h"
 #include "../../ion/src/external/lz4/lz4hc.h"
 

From 28545869beaba215f352450d823ba67f4590ad2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 17 Jan 2019 17:43:27 +0100
Subject: [PATCH 029/295] [kandinsky] Use new unicodes in fonts for
 Exponential, mu and i complex

---
 kandinsky/fonts/LargeSourcePixel.ttf | Bin 219468 -> 220768 bytes
 kandinsky/fonts/SmallSourcePixel.ttf | Bin 213592 -> 214268 bytes
 2 files changed, 0 insertions(+), 0 deletions(-)

diff --git a/kandinsky/fonts/LargeSourcePixel.ttf b/kandinsky/fonts/LargeSourcePixel.ttf
index 9def301b4e5a05efc3c4589701a79058dc70cc81..6271613a06a8cebfa01146cd1be4651b8d5b267c 100644
GIT binary patch
literal 220768
zcmce<37A~fc_3QnR(Dr-b#?7~-P-r1tGo8<?%Ru6TWg^ak`O{PvJgTjAPZSw+{PFa
zf^CK&gfI#rgy-S$WJlo<hIsmUupVKE<Hrz3W)#Bb;o}iKjYAj@A*3H+h{un<djEg!
zy;ZliuG<Y*d=gr!&iT)O{(U<tqEe|$@Jo-%xM|O}t?(zJQXkw8|L@<rY4etse)b=q
zQ>m}-hrgcPy65Uy_*WJD`%d^(d*z;y{B1k$_?n7&?<D;B(2ZZb;p8v>@_$^0KVML(
z@;|=u&N~9|_wafDlkjWL(UUiS@t^Pe?h`7t_cW}Rx%r0MPpaIiuu8q~OZa!=&Bwob
z^lkr^hv45>74yTMV>jJ!MEB~SJ*Hy*#tHvkJ_diG{$lS(us-e|Irhan7T<m34<Chp
z-=$L7KRJHejW-PR^=?uz=VnwY=bK-=Vew?&Py7A}{v3eM2Tt7Z#hd=|kG}e60MAn@
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zIVd(QXFVY<wc?D2RM%&f|4#Z^$-2Z1CF@C!^GpLgrgOiZ@U`~psx`D%Pl`)+I6tv2
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z=D3cBx5m%<#v}J%DNZIgUF!{X%(zgf!Bkzsjv0R{&T~{<bEfJgTd@%vjyk6;2lhjb
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From d57e28bdc737d44d46727602ec8fdc2372748546 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 09:41:07 +0100
Subject: [PATCH 030/295] [poincare] Clean parsing with unicodes

---
 poincare/src/parsing/parser.cpp    | 23 ++++++++++++++---------
 poincare/src/parsing/tokenizer.cpp | 16 ++++++++++++----
 2 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/poincare/src/parsing/parser.cpp b/poincare/src/parsing/parser.cpp
index 4dee65c2f..308c507f5 100644
--- a/poincare/src/parsing/parser.cpp
+++ b/poincare/src/parsing/parser.cpp
@@ -361,12 +361,14 @@ void Parser::parseSequence(Expression & leftHandSide, const char name, Token::Ty
     if (m_status != Status::Progress) {
     } else if (!popTokenIfType(rightDelimiter)) {
       m_status = Status::Error; // Right delimiter missing.
-    } else if (rank.isIdenticalTo(Symbol::Builder("n",1))) {
-      char sym[5] = {name, '(', 'n', ')', 0};
-      leftHandSide = Symbol::Builder(sym, 4);
-    } else if (rank.isIdenticalTo(Addition::Builder(Symbol::Builder("n",1),Rational::Builder("1")))) {
-      char sym[7] = {name, '(', 'n', '+', '1', ')', 0};
-      leftHandSide = Symbol::Builder(sym, 6);
+    } else if (rank.isIdenticalTo(Symbol::Builder('n'))) {
+      constexpr int symbolNameSize = 5;
+      char sym[symbolNameSize] = {name, '(', 'n', ')', 0};
+      leftHandSide = Symbol::Builder(sym, symbolNameSize);
+    } else if (rank.isIdenticalTo(Addition::Builder(Symbol::Builder('n'), Rational::Builder("1")))) {
+      constexpr int symbolNameSize = 7;
+      char sym[symbolNameSize] = {name, '(', 'n', '+', '1', ')', 0};
+      leftHandSide = Symbol::Builder(sym, symbolNameSize);
     } else {
       m_status = Status::Error; // Unexpected parameter.
     }
@@ -383,8 +385,12 @@ void Parser::parseSpecialIdentifier(Expression & leftHandSide) {
   } else if (m_currentToken.compareTo(Unreal::Name()) == 0) {
     leftHandSide = Unreal::Builder();
   } else if (m_currentToken.compareTo("u_") == 0 || m_currentToken.compareTo("v_") == 0) { // Special case for sequences (e.g. "u_{n}")
+    /* We now that m_currentToken.text()[0] is either 'u' or 'v', so we do not
+     * need to pass a code point to parseSequence. */
     parseSequence(leftHandSide, m_currentToken.text()[0], Token::LeftBrace, Token::RightBrace);
   } else if (m_currentToken.compareTo("u") == 0 || m_currentToken.compareTo("v") == 0) { // Special case for sequences (e.g. "u(n)")
+    /* We now that m_currentToken.text()[0] is either 'u' or 'v', so we do not
+     * need to pass a code point to parseSequence. */
     parseSequence(leftHandSide, m_currentToken.text()[0], Token::LeftParenthesis, Token::RightParenthesis);
   } else if (m_currentToken.compareTo("log_") == 0) { // Special case for the log function (e.g. "log_{2}(8)")
     if (!popTokenIfType(Token::LeftBrace)) {
@@ -426,7 +432,7 @@ void Parser::parseCustomIdentifier(Expression & leftHandSide, const char * name,
     return;
   }
   parameter = parameter.childAtIndex(0);
-  if (parameter.type() == ExpressionNode::Type::Symbol && strncmp(static_cast<SymbolAbstract&>(parameter).name(),name, length) == 0) {
+  if (parameter.type() == ExpressionNode::Type::Symbol && strncmp(static_cast<SymbolAbstract&>(parameter).name(), name, length) == 0) {
     m_status = Status::Error; // Function and variable must have distinct names.
   } else if (!popTokenIfType(Token::RightParenthesis)) {
     m_status = Status::Error; // Right parenthesis missing.
@@ -487,8 +493,7 @@ void Parser::parseMatrix(Expression & leftHandSide, Token::Type stoppingType) {
       return;
     }
     if ((numberOfRows == 0 && (numberOfColumns = row.numberOfChildren()) == 0)
-        ||
-        (numberOfColumns != row.numberOfChildren())) {
+        || (numberOfColumns != row.numberOfChildren())) {
       m_status = Status::Error; // Incorrect matrix.
       return;
     } else {
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 3ec666548..d1812f48d 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -14,16 +14,22 @@ static inline bool isDigit(const CodePoint c) {
 
 const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, bool * testResult) {
   UTF8Decoder decoder(m_text);
+  const char * currentPointer = m_text;
+  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint firstCodePoint = decoder.nextCodePoint();
-  size_t numberOfBytesForCodePoint = UTF8Decoder::CharSizeOfCodePoint(firstCodePoint);
+  size_t numberOfBytesForCodePoint = nextPointer - currentPointer;
   if (firstCodePoint != KDCodePointNull) {
+    currentPointer = nextPointer;
+    nextPointer = decoder.nextCodePointPointer();
     CodePoint codePoint = decoder.nextCodePoint();
     while (codePoint.isCombining()) {
-      numberOfBytesForCodePoint+= UTF8Decoder::CharSizeOfCodePoint(codePoint);
+      numberOfBytesForCodePoint+= nextPointer - currentPointer;
+      currentPointer = nextPointer;
+      nextPointer = decoder.nextCodePointPointer();
       codePoint = decoder.nextCodePoint();
     }
   }
-  // TODO handle combined code points?
+  // TODO handle combined code points? For now the combining codepoints get dropped.
   bool shouldPop = popTest(firstCodePoint, context);
   if (testResult != nullptr) {
     *testResult = shouldPop;
@@ -181,7 +187,9 @@ Token Tokenizer::popToken() {
   if (c == KDCodePointSquareRoot) {
     Token result(Token::Identifier);
     // TODO compute size manually?
-    result.setString(start, UTF8Decoder::CharSizeOfCodePoint(KDCodePointSquareRoot));
+    constexpr int squareRootCharLength = 3;
+    assert(UTF8Decoder::CharSizeOfCodePoint(KDCodePointSquareRoot) == squareRootCharLength);
+    result.setString(start, squareRootCharLength);
     return result;
   }
   if (c == KDCodePointEmpty) {

From 948f62ddffb0abd89ac5347e328c9097abe0f00f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 10:07:16 +0100
Subject: [PATCH 031/295] [poincare/serialization_helper] Clean CodePoint

---
 poincare/src/serialization_helper.cpp | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 953013948..71cb9dc39 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -158,12 +158,10 @@ int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoin
     buffer[0] = 0;
     return 0;
   }
-  char helpBuffer[MaxSerializedCodePointSize];
-  size_t size = UTF8Decoder::CodePointToChars(c, helpBuffer, MaxSerializedCodePointSize);
-  assert(size < MaxSerializedCodePointSize);
-  helpBuffer[size] = 0;
-  strlcpy(buffer, helpBuffer, bufferSize);
-  return strlen(buffer);
+  size_t size = UTF8Decoder::CodePointToChars(c, buffer, bufferSize);
+  int nullTerminatingIndex = min(size, bufferSize - 1);
+  buffer[nullTerminatingIndex] = 0;
+  return nullTerminatingIndex;
 }
 
 }

From fdfb568805857144c722952af3c0cafdea254eb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 09:58:24 +0100
Subject: [PATCH 032/295] [poincare/serialization_helper] Clean

---
 .../include/poincare/serialization_helper.h   |   7 +-
 poincare/src/constant.cpp                     |   2 +-
 poincare/src/serialization_helper.cpp         | 110 +++++++++++-------
 3 files changed, 78 insertions(+), 41 deletions(-)

diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index e0ed71193..061e587ce 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -6,6 +6,12 @@
 
 namespace Poincare {
 
+/* The serialization methods write their argument as a string in the given
+ * buffer, with a null-terminating 0. The return value is:
+ *   -> -1 if the buffer size is 0
+ *   -> Otherwise, the number of chars written, without the null terminating 0
+ */
+
 namespace SerializationHelper {
   // SerializableReference to text
   int Infix(
@@ -30,7 +36,6 @@ namespace SerializationHelper {
   // Write one char in a buffer
   int Char(char * buffer, int bufferSize, char c);
   // Write one code point in a buffer
-  constexpr int MaxSerializedCodePointSize = CodePoint::MaxCodePointCharLength + 1; // Null-terminating char
   int CodePoint(char * buffer, int bufferSize, CodePoint c);
 };
 
diff --git a/poincare/src/constant.cpp b/poincare/src/constant.cpp
index 788cf5135..329babeda 100644
--- a/poincare/src/constant.cpp
+++ b/poincare/src/constant.cpp
@@ -93,7 +93,7 @@ bool ConstantNode::isConstantCodePoint(CodePoint c) const {
 }
 
 Constant Constant::Builder(CodePoint c) {
-  constexpr int bufferSize = SerializationHelper::MaxSerializedCodePointSize;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char buffer[bufferSize];
   size_t codePointSize = SerializationHelper::CodePoint(buffer, bufferSize, c);
   return SymbolAbstract::Builder<Constant, ConstantNode>(buffer, codePointSize);
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 71cb9dc39..f77ddd247 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -5,24 +5,57 @@
 
 namespace Poincare {
 
-static void serializeChild(const TreeNode * childNode, const TreeNode * parentNode, char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfDigits, int * numberOfChar) {
+static inline int min(int x, int y) { return x < y ? x : y; }
+
+static bool checkBufferSize(char * buffer, int bufferSize, int * result) {
+  // If buffer has size 0 or 1, put a zero if it fits and return
+  if (bufferSize == 0) {
+    *result = -1;
+    return true;
+  }
+
+  buffer[bufferSize-1] = 0; // Null-terminate the buffer
+  if (bufferSize == 1) {
+    *result = 0;
+    return true;
+  }
+  return false;
+}
+
+static int serializeChild(
+    const TreeNode * childNode,
+    const TreeNode * parentNode,
+    char * buffer,
+    int bufferSize,
+    Preferences::PrintFloatMode floatDisplayMode,
+    int numberOfDigits)
+{
+  {
+    int result = 0;
+    if (checkBufferSize(buffer, bufferSize, &result)) {
+      return result;
+    }
+  }
+
+  int numberOfChar = 0;
   // Write the child with parentheses if needed
   bool addParentheses = parentNode->childNeedsParenthesis(childNode);
   if (addParentheses) {
-    buffer[*numberOfChar] = '(';
-    *numberOfChar = *numberOfChar + 1;
-    if (*numberOfChar >= bufferSize-1) {
-      return;
+    buffer[numberOfChar++] = '(';
+    if (numberOfChar >= bufferSize-1) {
+      return bufferSize-1;
     }
   }
-  *numberOfChar += childNode->serialize(buffer + *numberOfChar, bufferSize - *numberOfChar, floatDisplayMode, numberOfDigits);
-  if (*numberOfChar >= bufferSize-1) {
-    return;
+  numberOfChar+= childNode->serialize(buffer + numberOfChar, bufferSize - numberOfChar, floatDisplayMode, numberOfDigits);
+  if (numberOfChar >= bufferSize-1) {
+    assert(buffer[bufferSize - 1] == 0);
+    return bufferSize-1;
   }
   if (addParentheses) {
-    buffer[*numberOfChar] = ')';
-    *numberOfChar = *numberOfChar + 1;
+    buffer[numberOfChar++] = ')';
   }
+  buffer[numberOfChar] = 0;
+  return numberOfChar;
 }
 
 int SerializationHelper::Infix(
@@ -35,14 +68,11 @@ int SerializationHelper::Infix(
     int firstChildIndex,
     int lastChildIndex)
 {
-  // If buffer has size 0 or 1, put a zero if it fits and return
-  if (bufferSize == 0) {
-    return -1;
-  }
-
-  buffer[bufferSize-1] = 0; // Null-terminate the buffer
-  if (bufferSize == 1) {
-    return 0;
+  {
+    int result = 0;
+    if (checkBufferSize(buffer, bufferSize, &result)) {
+      return result;
+    }
   }
 
   // Get some information on the node
@@ -51,8 +81,9 @@ int SerializationHelper::Infix(
   assert(numberOfChildren > 0);
 
   // Write the first child, with parentheses if needed
-  serializeChild(node->childAtIndex(firstChildIndex), node, buffer, bufferSize, floatDisplayMode, numberOfDigits, &numberOfChar);
+  numberOfChar+= serializeChild(node->childAtIndex(firstChildIndex), node, buffer + numberOfChar, bufferSize - numberOfChar, floatDisplayMode, numberOfDigits);
   if (numberOfChar >= bufferSize-1) {
+    assert(buffer[bufferSize - 1] == 0);
     return bufferSize-1;
   }
   // For all remaining children:
@@ -61,11 +92,13 @@ int SerializationHelper::Infix(
     // Write the operator
     numberOfChar += strlcpy(buffer+numberOfChar, operatorName, bufferSize-numberOfChar);
     if (numberOfChar >= bufferSize-1) {
+      assert(buffer[bufferSize - 1] == 0);
       return bufferSize-1;
     }
     // Write the child, with parentheses if needed
-    serializeChild(node->childAtIndex(i), node, buffer, bufferSize, floatDisplayMode, numberOfDigits, &numberOfChar);
+    numberOfChar+= serializeChild(node->childAtIndex(i), node, buffer + numberOfChar, bufferSize - numberOfChar, floatDisplayMode, numberOfDigits);
     if (numberOfChar >= bufferSize-1) {
+      assert(buffer[bufferSize - 1] == 0);
       return bufferSize-1;
     }
   }
@@ -84,18 +117,17 @@ int SerializationHelper::Prefix(
     const char * operatorName,
     bool writeFirstChild)
 {
-  // If buffer has size 0 or 1, put a zero if it fits and return
-  if (bufferSize == 0) {
-    return -1;
-  }
-  buffer[bufferSize-1] = 0;
-    if (bufferSize == 1) {
-    return 0;
+  {
+    int result = 0;
+    if (checkBufferSize(buffer, bufferSize, &result)) {
+      return result;
+    }
   }
 
   // Copy the operator name
   int numberOfChar = strlcpy(buffer, operatorName, bufferSize);
   if (numberOfChar >= bufferSize-1) {
+    assert(buffer[bufferSize - 1] == 0);
     return bufferSize-1;
   }
 
@@ -115,6 +147,7 @@ int SerializationHelper::Prefix(
     // Write the first child
     numberOfChar += node->childAtIndex(firstChildIndex)->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits);
     if (numberOfChar >= bufferSize-1) {
+      assert(buffer[bufferSize - 1] == 0);
       return bufferSize-1;
     }
 
@@ -126,6 +159,7 @@ int SerializationHelper::Prefix(
       }
       numberOfChar += node->childAtIndex(i)->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits);
       if (numberOfChar >= bufferSize-1) {
+        assert(buffer[bufferSize - 1] == 0);
         return bufferSize-1;
       }
     }
@@ -138,12 +172,11 @@ int SerializationHelper::Prefix(
 }
 
 int SerializationHelper::Char(char * buffer, int bufferSize, char c) {
-  if (bufferSize == 0) {
-    return -1;
-  }
-  if (bufferSize == 1) {
-    buffer[0] = 0;
-    return 0;
+  {
+    int result = 0;
+    if (checkBufferSize(buffer, bufferSize, &result)) {
+      return result;
+    }
   }
   buffer[0] = c;
   buffer[1] = 0;
@@ -151,12 +184,11 @@ int SerializationHelper::Char(char * buffer, int bufferSize, char c) {
 }
 
 int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoint c) {
-  if (bufferSize == 0) {
-    return -1;
-  }
-  if (bufferSize == 1) {
-    buffer[0] = 0;
-    return 0;
+  {
+    int result = 0;
+    if (checkBufferSize(buffer, bufferSize, &result)) {
+      return result;
+    }
   }
   size_t size = UTF8Decoder::CodePointToChars(c, buffer, bufferSize);
   int nullTerminatingIndex = min(size, bufferSize - 1);

From 7a1fd686265f04ad860922bc8e068a1ddf301025 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 10:29:10 +0100
Subject: [PATCH 033/295] [poincare/utf8_decoder] nextCodePointPointer is now
 stringPosition

---
 apps/shared/toolbox_helpers.cpp                    | 4 ++--
 escher/src/text_input_helpers.cpp                  | 6 +++---
 kandinsky/include/kandinsky/unicode/utf8_decoder.h | 4 +---
 kandinsky/src/unicode/utf8_decoder.cpp             | 4 ----
 kandinsky/src/unicode/utf8_helper.cpp              | 8 ++++----
 poincare/src/layout_helper.cpp                     | 6 +++---
 poincare/src/parsing/tokenizer.cpp                 | 6 +++---
 7 files changed, 16 insertions(+), 22 deletions(-)

diff --git a/apps/shared/toolbox_helpers.cpp b/apps/shared/toolbox_helpers.cpp
index 9952847f6..10fb4a95b 100644
--- a/apps/shared/toolbox_helpers.cpp
+++ b/apps/shared/toolbox_helpers.cpp
@@ -11,8 +11,8 @@ int CursorIndexInCommandText(const char * text) {
   UTF8Decoder decoder(text);
   size_t index = 0;
   const char * currentPointer = text;
-  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   while (codePoint != KDCodePointNull) {
     if (codePoint == '(' || codePoint == '\'') {
       return index + 1;
@@ -22,8 +22,8 @@ int CursorIndexInCommandText(const char * text) {
     }
     index+= nextPointer - currentPointer;
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
   }
   return index;
 }
diff --git a/escher/src/text_input_helpers.cpp b/escher/src/text_input_helpers.cpp
index d6d39c632..5a653c3d3 100644
--- a/escher/src/text_input_helpers.cpp
+++ b/escher/src/text_input_helpers.cpp
@@ -8,8 +8,8 @@ size_t CursorIndexInCommand(const char * text) {
   size_t index = 0;
   UTF8Decoder decoder(text);
   const char * currentPointer = text;
-  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   while (codePoint != KDCodePointNull) {
     if (codePoint == KDCodePointEmpty) {
       return index;
@@ -18,8 +18,8 @@ size_t CursorIndexInCommand(const char * text) {
     if (codePoint == '\'') {
       index+= nextPointer - currentPointer;
       currentPointer = nextPointer;
-      nextPointer = decoder.nextCodePointPointer();
       codePoint = decoder.nextCodePoint();
+      nextPointer = decoder.stringPosition();
       if (codePoint == '\'') {
         return index;
       }
@@ -28,8 +28,8 @@ size_t CursorIndexInCommand(const char * text) {
     }
     index+= nextPointer - currentPointer;
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
   }
   return index;
 }
diff --git a/kandinsky/include/kandinsky/unicode/utf8_decoder.h b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
index 1f52cccb4..084765b9f 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
@@ -18,10 +18,8 @@
 class UTF8Decoder {
 public:
   UTF8Decoder(const char * string) : m_string(string) {}
-  /* TODO: Rename methods? nextCodePoint increases m_string but
-   * nextCodePointPointer does not */
   CodePoint nextCodePoint();
-  const char * nextCodePointPointer();
+  const char * stringPosition() const { return m_string; }
   static size_t CharSizeOfCodePoint(CodePoint c);
   static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
 private:
diff --git a/kandinsky/src/unicode/utf8_decoder.cpp b/kandinsky/src/unicode/utf8_decoder.cpp
index 288fcea92..5b23cbdb2 100644
--- a/kandinsky/src/unicode/utf8_decoder.cpp
+++ b/kandinsky/src/unicode/utf8_decoder.cpp
@@ -25,10 +25,6 @@ CodePoint UTF8Decoder::nextCodePoint() {
   return CodePoint(result);
 }
 
-const char * UTF8Decoder::nextCodePointPointer() {
-  return m_string + leading_ones(*m_string);
-}
-
 size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
   constexpr int bufferSize = CodePoint::MaxCodePointCharLength;
   char buffer[bufferSize];
diff --git a/kandinsky/src/unicode/utf8_helper.cpp b/kandinsky/src/unicode/utf8_helper.cpp
index 3293e14fd..da2d47f2b 100644
--- a/kandinsky/src/unicode/utf8_helper.cpp
+++ b/kandinsky/src/unicode/utf8_helper.cpp
@@ -10,12 +10,12 @@ static inline int min(int x, int y) { return x < y ? x : y; }
 const char * CodePointSearch(const char * s, CodePoint c) {
   UTF8Decoder decoder(s);
   const char * currentPointer = s;
-  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   while (codePoint != KDCodePointNull && codePoint != c) {
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
   }
   if (codePoint == c) {
     return currentPointer;
@@ -26,9 +26,9 @@ const char * CodePointSearch(const char * s, CodePoint c) {
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, size_t * indexToUpdate) {
   UTF8Decoder decoder(src);
   const char * currentPointer = src;
-  const char * nextPointer = decoder.nextCodePointPointer();
   const char * maxPointer = src + strlen(src) + 1;
   CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   size_t bufferIndex = 0;
   size_t codePointCharSize = UTF8Decoder::CharSizeOfCodePoint(c);
 
@@ -43,8 +43,8 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
       *indexToUpdate-= codePointCharSize;
     }
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
   }
 }
 
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index fd7919243..2b41a2b45 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -59,8 +59,8 @@ HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const
   HorizontalLayout resultLayout = HorizontalLayout::Builder();
   UTF8Decoder decoder(buffer);
   const char * currentPointer = buffer;
-  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   assert(!codePoint.isCombining());
   int layoutIndex = 0;
   int bufferIndex = 0;
@@ -69,13 +69,13 @@ HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const
     layoutIndex++;
     bufferIndex+= nextPointer - currentPointer;
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
     while (codePoint.isCombining()) {
       bufferIndex+= nextPointer - currentPointer;
       currentPointer = nextPointer;
-      nextPointer = decoder.nextCodePointPointer();
       codePoint = decoder.nextCodePoint();
+      nextPointer = decoder.stringPosition();
     }
   }
   return resultLayout;
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index d1812f48d..ea30387a4 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -15,18 +15,18 @@ static inline bool isDigit(const CodePoint c) {
 const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, bool * testResult) {
   UTF8Decoder decoder(m_text);
   const char * currentPointer = m_text;
-  const char * nextPointer = decoder.nextCodePointPointer();
   CodePoint firstCodePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
   size_t numberOfBytesForCodePoint = nextPointer - currentPointer;
   if (firstCodePoint != KDCodePointNull) {
     currentPointer = nextPointer;
-    nextPointer = decoder.nextCodePointPointer();
     CodePoint codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
     while (codePoint.isCombining()) {
       numberOfBytesForCodePoint+= nextPointer - currentPointer;
       currentPointer = nextPointer;
-      nextPointer = decoder.nextCodePointPointer();
       codePoint = decoder.nextCodePoint();
+      nextPointer = decoder.stringPosition();
     }
   }
   // TODO handle combined code points? For now the combining codepoints get dropped.

From 07a910b455b84413620282a5dce4e31fab3c3922 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 10:54:21 +0100
Subject: [PATCH 034/295] [escher] Clean text_input

---
 escher/include/escher/text_input.h | 20 ++++++++++-----
 escher/src/text_input.cpp          | 40 ++++++++----------------------
 2 files changed, 24 insertions(+), 36 deletions(-)

diff --git a/escher/include/escher/text_input.h b/escher/include/escher/text_input.h
index 826b92d21..f4a705c77 100644
--- a/escher/include/escher/text_input.h
+++ b/escher/include/escher/text_input.h
@@ -1,14 +1,14 @@
 #ifndef ESCHER_TEXT_INPUT_H
 #define ESCHER_TEXT_INPUT_H
 
-#include <assert.h>
-#include <string.h>
 #include <escher/scrollable_view.h>
 #include <escher/text_cursor_view.h>
+#include <assert.h>
+#include <string.h>
 
 class TextInput : public ScrollableView, public ScrollViewDataSource {
 public:
-  TextInput(Responder * parentResponder, View * contentView);
+  TextInput(Responder * parentResponder, View * contentView) : ScrollableView(parentResponder, contentView, this) {}
   void setFont(const KDFont * font) { contentView()->setFont(font); }
   const char * text() const { return nonEditableContentView()->text(); }
   bool removeChar();
@@ -18,7 +18,12 @@ public:
 protected:
   class ContentView : public View {
   public:
-    ContentView(const KDFont * font);
+    ContentView(const KDFont * font) :
+      View(),
+      m_cursorView(),
+      m_font(font),
+      m_cursorIndex(0)
+    {}
     void setFont(const KDFont * font);
     const KDFont * font() const { return m_font; }
     size_t cursorLocation() const { return m_cursorIndex; }
@@ -37,8 +42,11 @@ protected:
     const KDFont * m_font;
     size_t m_cursorIndex;
   private:
-    int numberOfSubviews() const override;
-    View * subviewAtIndex(int index) override;
+    int numberOfSubviews() const override { return 1; }
+    View * subviewAtIndex(int index) override {
+      assert(index == 1);
+      return &m_cursorView;
+    }
     virtual size_t editedTextLength() const = 0;
   };
 protected:
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index 51c7d6dfd..dee7c1f79 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -3,14 +3,6 @@
 
 /* TextInput::ContentView */
 
-TextInput::ContentView::ContentView(const KDFont * font) :
-  View(),
-  m_cursorView(),
-  m_font(font),
-  m_cursorIndex(0)
-{
-}
-
 void TextInput::ContentView::setCursorLocation(int location) {
   assert(location >= 0);
   int adjustedLocation = location > (signed int)editedTextLength() ? (signed int)editedTextLength() : location;
@@ -27,14 +19,6 @@ KDRect TextInput::ContentView::cursorRect() {
   return characterFrameAtIndex(m_cursorIndex);
 }
 
-int TextInput::ContentView::numberOfSubviews() const {
-  return 1;
-}
-
-View * TextInput::ContentView::subviewAtIndex(int index) {
-  return &m_cursorView;
-}
-
 void TextInput::ContentView::layoutSubviews() {
   m_cursorView.setFrame(cursorRect());
 }
@@ -43,7 +27,7 @@ KDRect TextInput::ContentView::dirtyRectFromCursorPosition(size_t index, bool li
   KDRect charRect = characterFrameAtIndex(index);
   KDRect dirtyRect = KDRect(charRect.x(), charRect.y(), bounds().width() - charRect.x(), charRect.height());
   if (lineBreak) {
-      dirtyRect = dirtyRect.unionedWith(KDRect(0, charRect.bottom()+1, bounds().width(), bounds().height()-charRect.bottom()-1));
+    dirtyRect = dirtyRect.unionedWith(KDRect(0, charRect.bottom()+1, bounds().width(), bounds().height()-charRect.bottom()-1));
   }
   return dirtyRect;
 }
@@ -54,11 +38,6 @@ void TextInput::ContentView::reloadRectFromCursorPosition(size_t index, bool lin
 
 /* TextInput */
 
-TextInput::TextInput(Responder * parentResponder, View * contentView) :
-  ScrollableView(parentResponder, contentView, this)
-{
-}
-
 bool TextInput::removeChar() {
   contentView()->removeChar();
   scrollToCursor();
@@ -66,13 +45,14 @@ bool TextInput::removeChar() {
 }
 
 void TextInput::scrollToCursor() {
-  /* Technically, we do not need to overscroll in text input. However,
-   * logically, we should layout the scroll view before calling
-   * scrollToContentRect in case the size of the scroll view has changed and
-   * then call scrollToContentRect which call another layout of the scroll view
-   * if the offset has evolved. In order to avoid requiring two layouts, we
-   * allow overscrolling in scrollToContentRect and the last layout of the
-   * scroll view corrects the size of the scroll view only once. */
+  /* Technically, we do not need to overscroll in text input. However, we should
+   * layout the scroll view before calling scrollToContentRect (in case the size
+   * of the scroll view has changed) and then call scrollToContentRect which
+   * calls another layout of the scroll view if the offset has evolved.
+   *
+   * In order to avoid requiring two layouts, we allow overscrolling in
+   * scrollToContentRect, and the last layout of the scroll view corrects the
+   * size of the scroll view only once. */
   scrollToContentRect(contentView()->cursorRect(), true);
 }
 
@@ -87,7 +67,7 @@ bool TextInput::setCursorLocation(int location) {
 bool TextInput::insertTextAtLocation(const char * text, int location) {
   if (contentView()->insertTextAtLocation(text, location)) {
     /* We layout the scrollable view before scrolling to cursor because the
-     *  content size might have changed. */
+     * content size might have changed. */
     layoutSubviews();
     scrollToCursor();
     return true;

From 5c39cab73e0a6aae8e0bcf0784b795444895a488 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 18 Jan 2019 16:41:39 +0100
Subject: [PATCH 035/295] [escher] Fix text inputs so they use UTF8

---
 apps/code/editor_controller.cpp               |  61 ++--
 apps/code/editor_controller.h                 |   2 +-
 apps/code/editor_view.h                       |   4 +-
 apps/code/menu_controller.cpp                 |  15 +-
 apps/code/python_text_area.cpp                |   6 +-
 apps/code/python_text_area.h                  |   2 +-
 apps/probability/calculation_controller.cpp   |   7 +-
 .../editable_cell_table_view_controller.cpp   |   4 +-
 apps/shared/text_field_with_extension.cpp     |  23 +-
 apps/shared/text_field_with_extension.h       |   2 +-
 escher/include/escher/text_area.h             |  28 +-
 escher/include/escher/text_field.h            |  19 +-
 escher/include/escher/text_input.h            |  30 +-
 escher/include/escher/text_input_helpers.h    |  10 +-
 escher/src/text_area.cpp                      | 304 +++++++++++-------
 escher/src/text_field.cpp                     | 202 +++++++-----
 escher/src/text_input.cpp                     |  53 +--
 escher/src/text_input_helpers.cpp             |  18 +-
 kandinsky/include/kandinsky/font.h            |   5 +-
 .../include/kandinsky/unicode/utf8_decoder.h  |  16 +-
 .../include/kandinsky/unicode/utf8_helper.h   |   2 +-
 kandinsky/src/font.cpp                        |  11 +-
 kandinsky/src/unicode/utf8_decoder.cpp        |  38 ++-
 kandinsky/src/unicode/utf8_helper.cpp         |   8 +-
 24 files changed, 510 insertions(+), 360 deletions(-)

diff --git a/apps/code/editor_controller.cpp b/apps/code/editor_controller.cpp
index 51f1f2397..11a22cb07 100644
--- a/apps/code/editor_controller.cpp
+++ b/apps/code/editor_controller.cpp
@@ -44,7 +44,7 @@ void EditorController::didBecomeFirstResponder() {
 
 void EditorController::viewWillAppear() {
   m_editorView.loadSyntaxHighlighter();
-  m_editorView.setCursorLocation(strlen(m_editorView.text()));
+  m_editorView.setCursorTextLocation(m_editorView.text() + strlen(m_editorView.text()));
 }
 
 void EditorController::viewDidDisappear() {
@@ -53,7 +53,8 @@ void EditorController::viewDidDisappear() {
 
 bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events::Event event) {
   if (event == Ion::Events::Var) {
-    // We save script before displaying the Variable box to add new functions or variables
+    /* We save the script before displaying the Variable box to add new
+     * functions or variables. */
     saveScript();
     return false;
   }
@@ -61,60 +62,38 @@ bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events:
     return true;
   }
   if (event == Ion::Events::EXE) {
-    // Auto-Indent
-    char * text = const_cast<char *>(textArea->text());
-    int charBeforeCursorIndex = textArea->cursorLocation()-1;
-    int indentationSize = 0;
-    // Indent more if the previous line ends with ':'.
-    if (charBeforeCursorIndex >= 0 && text[charBeforeCursorIndex] == ':') {
-      indentationSize += k_indentationSpacesNumber;
-    }
-    // Compute the indentation of the current line.
-    int indentationIndex = charBeforeCursorIndex;
-    while (indentationIndex >= 0 && text[indentationIndex] != '\n') {
-      indentationIndex--;
-    }
-    if (indentationIndex >= 0) {
-      indentationIndex++;
-      while (text[indentationIndex] == ' ') {
-        indentationSize++;
-        indentationIndex++;
-      }
-    }
-    textArea->handleEventWithText("\n");
-    for (int i = 0; i < indentationSize; i++) {
-      textArea->handleEventWithText(" ");
-    }
+    textArea->handleEventWithText("\n", true, false);
     return true;
   }
 
   if (event == Ion::Events::Backspace) {
-    // If the cursor is on the left of the text of a line,
-    // backspace one intentation space at a time.
+    /* If the cursor is on the left of the text of a line, backspace one
+     * indentation space at a time. */
     char * text = const_cast<char *>(textArea->text());
-    int charBeforeCursorIndex = textArea->cursorLocation()-1;
+    const char * charBeforeCursorPointer = textArea->cursorTextLocation()-1;
     int indentationSize = 0;
-    while (charBeforeCursorIndex >= 0 && text[charBeforeCursorIndex] == ' ') {
-      charBeforeCursorIndex--;
+    while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
+      charBeforeCursorPointer--;
       indentationSize++;
     }
-    if (charBeforeCursorIndex >= 0 && text[charBeforeCursorIndex] == '\n'
+    if (charBeforeCursorPointer >= text
+        && *charBeforeCursorPointer == '\n'
         && indentationSize >= k_indentationSpacesNumber)
     {
       for (int i = 0; i < k_indentationSpacesNumber; i++) {
-        textArea->removeChar();
+        textArea->removeCodePoint();
       }
       return true;
     }
   } else if (event == Ion::Events::Space) {
-    // If the cursor is on the left of the text of a line,
-    // a space triggers an indentation.
+    /* If the cursor is on the left of the text of a line, a space triggers an
+     * indentation. */
     char * text = const_cast<char *>(textArea->text());
-    int charBeforeCursorIndex = textArea->cursorLocation()-1;
-    while (charBeforeCursorIndex >= 0 && text[charBeforeCursorIndex] == ' ') {
-      charBeforeCursorIndex--;
+    const char * charBeforeCursorPointer = textArea->cursorTextLocation()-1;
+    while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
+      charBeforeCursorPointer--;
     }
-    if (charBeforeCursorIndex >= 0 && text[charBeforeCursorIndex] == '\n') {
+    if (charBeforeCursorPointer >= text && *charBeforeCursorPointer == '\n') {
       char indentationBuffer[k_indentationSpacesNumber+1];
       for (int i = 0; i < k_indentationSpacesNumber; i++) {
         indentationBuffer[i] = ' ';
@@ -144,9 +123,7 @@ StackViewController * EditorController::stackController() {
 void EditorController::saveScript() {
   size_t sizeOfValue = strlen(m_areaBuffer+1)+1+1; // size of scriptContent + size of importation status
   Script::ErrorStatus err = m_script.setValue({.buffer=m_areaBuffer, .size=sizeOfValue});
-  if (err == Script::ErrorStatus::NotEnoughSpaceAvailable || err == Script::ErrorStatus::RecordDoesNotExist) {
-    assert(false); // This should not happen as we set the text area according to the available space in the Kallax
-  }
+  assert(err != Script::ErrorStatus::NotEnoughSpaceAvailable && err != Script::ErrorStatus::RecordDoesNotExist); // This should not happen as we set the text area according to the available space in the Kallax
 }
 
 }
diff --git a/apps/code/editor_controller.h b/apps/code/editor_controller.h
index 34e3eadab..93e3adb60 100644
--- a/apps/code/editor_controller.h
+++ b/apps/code/editor_controller.h
@@ -34,7 +34,7 @@ public:
 
 private:
   Shared::InputEventHandlerDelegateApp * inputEventHandlerDelegateApp() override;
-  static constexpr int k_indentationSpacesNumber = 2;
+  static constexpr int k_indentationSpacesNumber = 2; //TODO LEA merge with text area k_indentationSpaces
   StackViewController * stackController();
   void saveScript();
   EditorView m_editorView;
diff --git a/apps/code/editor_view.h b/apps/code/editor_view.h
index 16cb0749c..170fc9b54 100644
--- a/apps/code/editor_view.h
+++ b/apps/code/editor_view.h
@@ -16,8 +16,8 @@ public:
   void setText(char * textBuffer, size_t textBufferSize) {
     m_textArea.setText(textBuffer, textBufferSize);
   }
-  bool setCursorLocation(int location) {
-    return m_textArea.setCursorLocation(location);
+  bool setCursorTextLocation(const char * location) {
+    return m_textArea.setCursorTextLocation(location);
   }
   void loadSyntaxHighlighter() { m_textArea.loadSyntaxHighlighter(); };
   void unloadSyntaxHighlighter() { m_textArea.unloadSyntaxHighlighter(); };
diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index bf4533456..363cdce52 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -126,7 +126,7 @@ void MenuController::renameSelectedScript() {
   app()->setFirstResponder(myCell);
   myCell->setHighlighted(false);
   myCell->textField()->setEditing(true, false);
-  myCell->textField()->setCursorLocation(strlen(myCell->textField()->text()));
+  myCell->textField()->setCursorTextLocation(myCell->textField()->text() + strlen(myCell->textField()->text()));
 }
 
 void MenuController::deleteScript(Script script) {
@@ -283,7 +283,9 @@ bool MenuController::textFieldShouldFinishEditing(TextField * textField, Ion::Ev
 }
 
 bool MenuController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
-  if (event == Ion::Events::Right && textField->isEditing() && textField->cursorLocation() == textField->draftTextLength()) {
+  if (event == Ion::Events::Right
+      && textField->isEditing()
+      && textField->cursorTextLocation() == textField->text() + textField->draftTextLength()) {
     return true;
   }
   if (event == Ion::Events::Clear && textField->isEditing()) {
@@ -292,7 +294,7 @@ bool MenuController::textFieldDidReceiveEvent(TextField * textField, Ion::Events
     assert(k_bufferSize >= 1 + strlen(ScriptStore::k_scriptExtension) + 1);
     strlcpy(&buffer[1], ScriptStore::k_scriptExtension, strlen(ScriptStore::k_scriptExtension) + 1);
     textField->setText(buffer);
-    textField->setCursorLocation(0);
+    textField->setCursorTextLocation(textField->text());
     return true;
   }
   return false;
@@ -316,7 +318,7 @@ bool MenuController::textFieldDidFinishEditing(TextField * textField, const char
      * default name and let the user modify it. */
     if (!foundDefaultName) {
       textField->setText(numberedDefaultName);
-      textField->setCursorLocation(defaultNameLength);
+      textField->setCursorTextLocation(textField->draftTextBuffer() + defaultNameLength);
     }
     newName = const_cast<const char *>(numberedDefaultName);
   }
@@ -348,8 +350,9 @@ bool MenuController::textFieldDidFinishEditing(TextField * textField, const char
 
 bool MenuController::textFieldDidHandleEvent(TextField * textField, bool returnValue, bool textSizeDidChange) {
   int scriptExtensionLength = 1 + strlen(ScriptStore::k_scriptExtension);
-  if (textField->isEditing() && textField->cursorLocation() > textField->draftTextLength() - scriptExtensionLength) {
-    textField->setCursorLocation(textField->draftTextLength() - scriptExtensionLength);
+  const char * maxPointerLocation = textField->text() + textField->draftTextLength() - scriptExtensionLength;
+  if (textField->isEditing() && textField->cursorTextLocation() > maxPointerLocation) {
+    textField->setCursorTextLocation(maxPointerLocation);
   }
   return returnValue;
 }
diff --git a/apps/code/python_text_area.cpp b/apps/code/python_text_area.cpp
index e8764be2d..d99d26e60 100644
--- a/apps/code/python_text_area.cpp
+++ b/apps/code/python_text_area.cpp
@@ -18,7 +18,7 @@ constexpr KDColor OperatorColor = KDColor::RGB24(0xd73a49);
 constexpr KDColor StringColor = KDColor::RGB24(0x032f62);
 constexpr KDColor BackgroundColor = KDColorWhite;
 
-static inline int min(int x, int y) { return (x<y ? x : y); }
+static inline int min(int x, int y) { return x < y ? x : y; }
 
 static inline KDColor TokenColor(mp_token_kind_t tokenKind) {
   if (tokenKind == MP_TOKEN_STRING) {
@@ -164,13 +164,13 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
   }
 }
 
-KDRect PythonTextArea::ContentView::dirtyRectFromCursorPosition(size_t index, bool lineBreak) const {
+KDRect PythonTextArea::ContentView::dirtyRectFromPosition(const char * position, bool lineBreak) const {
   /* Mark the whole line as dirty.
    * TextArea has a very conservative approach and only dirties the surroundings
    * of the current character. That works for plain text, but when doing syntax
    * highlighting, you may want to redraw the surroundings as well. For example,
    * if editing "def foo" into "df foo", you'll want to redraw "df". */
-  KDRect baseDirtyRect = TextArea::ContentView::dirtyRectFromCursorPosition(index, lineBreak);
+  KDRect baseDirtyRect = TextArea::ContentView::dirtyRectFromPosition(position, lineBreak);
   return KDRect(
     bounds().x(),
     baseDirtyRect.y(),
diff --git a/apps/code/python_text_area.h b/apps/code/python_text_area.h
index 45bfb4151..a16b5006b 100644
--- a/apps/code/python_text_area.h
+++ b/apps/code/python_text_area.h
@@ -28,7 +28,7 @@ protected:
     void unloadSyntaxHighlighter();
     void clearRect(KDContext * ctx, KDRect rect) const override;
     void drawLine(KDContext * ctx, int line, const char * text, size_t length, int fromColumn, int toColumn) const override;
-    KDRect dirtyRectFromCursorPosition(size_t index, bool lineBreak) const override;
+    KDRect dirtyRectFromPosition(const char * position, bool lineBreak) const override;
   private:
     App * m_pythonDelegate;
   };
diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 12d3f3de4..90c509640 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -202,8 +202,11 @@ bool CalculationController::textFieldDidHandleEvent(::TextField * textField, boo
 
 bool CalculationController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
   return TextFieldDelegate::textFieldShouldFinishEditing(textField, event)
-       || (event == Ion::Events::Right && textField->cursorLocation() == textField->draftTextLength() && selectedColumn() < m_calculation->numberOfParameters())
-       || (event == Ion::Events::Left && textField->cursorLocation() == 0);
+       || (event == Ion::Events::Right
+           && textField->cursorTextLocation() == textField->text() + textField->draftTextLength()
+           && selectedColumn() < m_calculation->numberOfParameters())
+       || (event == Ion::Events::Left
+           && textField->cursorTextLocation() == textField->text());
 }
 
 bool CalculationController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index b9a5af534..a6c411bd8 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -19,8 +19,8 @@ bool EditableCellTableViewController::textFieldShouldFinishEditing(TextField * t
   return TextFieldDelegate::textFieldShouldFinishEditing(textField, event)
      || (event == Ion::Events::Down && selectedRow() < numberOfRows()-1)
      || (event == Ion::Events::Up && selectedRow() > 0)
-     || (event == Ion::Events::Right && textField->cursorLocation() == textField->draftTextLength() && selectedColumn() < numberOfColumns()-1)
-     || (event == Ion::Events::Left && textField->cursorLocation() == 0 && selectedColumn() > 0);
+     || (event == Ion::Events::Right && (textField->cursorTextLocation() == textField->draftTextBuffer() + textField->draftTextLength()) && selectedColumn() < numberOfColumns()-1)
+     || (event == Ion::Events::Left && textField->cursorTextLocation() == textField->draftTextBuffer() && selectedColumn() > 0);
 }
 
 bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
diff --git a/apps/shared/text_field_with_extension.cpp b/apps/shared/text_field_with_extension.cpp
index b2a3ca9fe..5d74cb531 100644
--- a/apps/shared/text_field_with_extension.cpp
+++ b/apps/shared/text_field_with_extension.cpp
@@ -2,11 +2,11 @@
 
 namespace Shared {
 
-void TextFieldWithExtension::willSetCursorLocation(int * location) {
+void TextFieldWithExtension::willSetCursorTextLocation(const char * * location) {
   size_t textLength = strlen(text());
   assert(textLength >= m_extensionLength);
-  size_t maxLocation = textLength - m_extensionLength;
-  if (*location > (int)maxLocation) {
+  const char * maxLocation = m_contentView.draftTextBuffer() + (textLength - m_extensionLength);
+  if (*location > maxLocation) {
     *location = maxLocation;
   }
 }
@@ -21,17 +21,18 @@ void TextFieldWithExtension::removeWholeText() {
 }
 
 bool TextFieldWithExtension::removeTextBeforeExtension(bool whole) {
-  int extensionIndex = strlen(text()) - m_extensionLength;
-  assert(extensionIndex >= 0 && extensionIndex < ContentView::k_maxBufferSize - m_extensionLength);
-  int destinationIndex = whole ? 0 : cursorLocation();
-  if (destinationIndex == extensionIndex) {
+  assert(isEditing());
+  const char * extension = m_contentView.draftTextBuffer() + (strlen(text()) - m_extensionLength);
+  assert(extension >= m_contentView.draftTextBuffer() && extension < m_contentView.draftTextBuffer() + (ContentView::k_maxBufferSize - m_extensionLength));
+  char * destination = whole ? m_contentView.draftTextBuffer() : const_cast<char *>(cursorTextLocation());
+  if (destination == extension) {
     return false;
   }
-  assert(destinationIndex >= 0);
-  assert(destinationIndex < extensionIndex);
+  assert(destination >= m_contentView.draftTextBuffer());
+  assert(destination < extension);
   m_contentView.willModifyTextBuffer();
-  strlcpy(&(m_contentView.textBuffer()[destinationIndex]), &(m_contentView.textBuffer()[extensionIndex]), ContentView::k_maxBufferSize);
-  m_contentView.setCursorLocation(destinationIndex);
+  strlcpy(destination, extension, ContentView::k_maxBufferSize - (destination - m_contentView.draftTextBuffer()));
+  m_contentView.setCursorTextLocation(destination);
   m_contentView.didModifyTextBuffer();
   layoutSubviews();
   return true;
diff --git a/apps/shared/text_field_with_extension.h b/apps/shared/text_field_with_extension.h
index 12e087ef5..fa2264be4 100644
--- a/apps/shared/text_field_with_extension.h
+++ b/apps/shared/text_field_with_extension.h
@@ -24,7 +24,7 @@ public:
     m_extensionLength(extensionLength)
   {}
 private:
-  void willSetCursorLocation(int * location) override;
+  void willSetCursorTextLocation(const char * * location) override;
   bool privateRemoveEndOfLine() override;
   void removeWholeText() override;
   bool removeTextBeforeExtension(bool whole);
diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 94a663e9f..2e60c9d52 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -17,7 +17,7 @@ public:
 
 protected:
   int indentationBeforeCursor() const;
-  bool insertTextWithIndentation(const char * textBuffer, int location);
+  bool insertTextWithIndentation(const char * textBuffer, const char * location);
 
   class Text {
   public:
@@ -36,11 +36,12 @@ protected:
     public:
       Line(const char * text);
       const char * text() const { return m_text; }
-      size_t length() const { return m_length; }
+      size_t charLength() const { return m_charLength; }
+      KDCoordinate glyphWidth(const KDFont * const font) const;
       bool contains(const char * c) const;
     private:
       const char * m_text;
-      size_t m_length;
+      size_t m_charLength;
     };
 
     class LineIterator {
@@ -66,14 +67,16 @@ protected:
     LineIterator begin() const { return LineIterator(m_buffer); };
     LineIterator end() const { return LineIterator(nullptr); };
 
-    Position span() const;
+    KDSize span(const KDFont * const font) const;
 
-    Position positionAtIndex(size_t index) const;
-    size_t indexAtPosition(Position p);
+    Position positionAtPointer(const char * pointer) const;
+    const char * pointerAtPosition(Position p);
 
-    void insertChar(char c, size_t index);
-    char removeChar(size_t index);
-    size_t removeRemainingLine(size_t index, int direction);
+    void insertText(const char * s, int textLength, char * location);
+    void insertSpacesAtLocation(int numberOfSpaces, char * location);
+
+    CodePoint removeCodePoint(const char * * position);
+    size_t removeRemainingLine(const char * position, int direction);
     char operator[](size_t index) {
       assert(index < m_bufferSize);
       return m_buffer[index];
@@ -105,18 +108,19 @@ protected:
     const char * text() const override { return m_text.text(); }
     size_t editedTextLength() const override { return m_text.textLength(); }
     const Text * getText() const { return &m_text; }
-    bool insertTextAtLocation(const char * text, int location) override;
+    bool insertTextAtLocation(const char * text, const char * location) override;
     void moveCursorGeo(int deltaX, int deltaY);
-    bool removeChar() override;
+    bool removeCodePoint() override;
     bool removeEndOfLine() override;
     bool removeStartOfLine();
   protected:
-    KDRect characterFrameAtIndex(size_t index) const override;
+    KDRect glyphFrameAtPosition(const char * position) const override;
     Text m_text;
   };
 
   ContentView * contentView() { return static_cast<ContentView *>(TextInput::contentView()); }
 private:
+  static constexpr int k_indentationSpaces = 2;
   TextAreaDelegate * m_delegate;
 };
 
diff --git a/escher/include/escher/text_field.h b/escher/include/escher/text_field.h
index 46a9c73f2..9077e2332 100644
--- a/escher/include/escher/text_field.h
+++ b/escher/include/escher/text_field.h
@@ -16,7 +16,8 @@ public:
   void setDelegates(InputEventHandlerDelegate * inputEventHandlerDelegate, TextFieldDelegate * delegate) { m_inputEventHandlerDelegate = inputEventHandlerDelegate; m_delegate = delegate; }
   void setDraftTextBuffer(char * draftTextBuffer);
   bool isEditing() const override;
-  size_t draftTextLength() const;
+  const char * draftTextBuffer() const { return const_cast<TextField *>(this)->m_contentView.draftTextBuffer(); }
+  size_t draftTextLength() const; //TODO keep ?
   void setText(const char * text);
   void setAlignment(float horizontalAlignment, float verticalAlignment);
   virtual void setEditing(bool isEditing, bool reinitDraftBuffer = true) override;
@@ -40,7 +41,7 @@ protected:
     void drawRect(KDContext * ctx, KDRect rect) const override;
     bool isEditing() const { return m_isEditing; }
     const char * text() const override;
-    size_t editedTextLength() const override;
+    size_t editedTextLength() const override { return m_currentDraftTextLength; } //TODO keep ?
     char * textBuffer() { return m_textBuffer; }
     char * draftTextBuffer() { return m_draftTextBuffer; }
     int bufferSize() { return k_maxBufferSize; }
@@ -48,12 +49,12 @@ protected:
     void setAlignment(float horizontalAlignment, float verticalAlignment);
     void setEditing(bool isEditing, bool reinitDraftBuffer);
     void reinitDraftTextBuffer();
-  /* If the text to be appended is too long to be added without overflowing the
-   * buffer, nothing is done (not even adding few letters from the text to reach
-   * the maximum buffer capacity) and false is returned. */
-    bool insertTextAtLocation(const char * text, int location) override;
+    /* If the text to be appended is too long to be added without overflowing the
+     * buffer, nothing is done (not even adding few letters from the text to reach
+     * the maximum buffer capacity) and false is returned. */
+    bool insertTextAtLocation(const char * text, const char * location) override; // TODO
     KDSize minimalSizeForOptimalDisplay() const override;
-    bool removeChar() override;
+    bool removeCodePoint() override;
     bool removeEndOfLine() override;
     void willModifyTextBuffer();
     void didModifyTextBuffer();
@@ -65,11 +66,11 @@ protected:
     constexpr static int k_maxBufferSize = 152;
   private:
     void layoutSubviews() override;
-    KDRect characterFrameAtIndex(size_t index) const override;
+    KDRect glyphFrameAtPosition(const char * position) const override;
     bool m_isEditing;
     char * m_textBuffer;
     char * m_draftTextBuffer;
-    size_t m_currentDraftTextLength;
+    size_t m_currentDraftTextLength; //TODO keep ?
     size_t m_textBufferSize;
     float m_horizontalAlignment;
     float m_verticalAlignment;
diff --git a/escher/include/escher/text_input.h b/escher/include/escher/text_input.h
index f4a705c77..283d3db90 100644
--- a/escher/include/escher/text_input.h
+++ b/escher/include/escher/text_input.h
@@ -11,9 +11,9 @@ public:
   TextInput(Responder * parentResponder, View * contentView) : ScrollableView(parentResponder, contentView, this) {}
   void setFont(const KDFont * font) { contentView()->setFont(font); }
   const char * text() const { return nonEditableContentView()->text(); }
-  bool removeChar();
-  size_t cursorLocation() const { return nonEditableContentView()->cursorLocation(); }
-  bool setCursorLocation(int location);
+  bool removeCodePoint();
+  const char * cursorTextLocation() const { return nonEditableContentView()->cursorTextLocation(); }
+  bool setCursorTextLocation(const char * location);
   virtual void scrollToCursor();
 protected:
   class ContentView : public View {
@@ -22,29 +22,29 @@ protected:
       View(),
       m_cursorView(),
       m_font(font),
-      m_cursorIndex(0)
+      m_cursorTextLocation(nullptr)
     {}
     void setFont(const KDFont * font);
     const KDFont * font() const { return m_font; }
-    size_t cursorLocation() const { return m_cursorIndex; }
-    void setCursorLocation(int cursorLocation);
+    const char * cursorTextLocation() const { assert(m_cursorTextLocation != nullptr); return m_cursorTextLocation; }
+    void setCursorTextLocation(const char * cursorTextLocation);
     virtual const char * text() const = 0;
-    virtual bool insertTextAtLocation(const char * text, int location) = 0;
-    virtual bool removeChar() = 0;
+    virtual bool insertTextAtLocation(const char * text, const char * location) = 0;
+    virtual bool removeCodePoint() = 0;
     virtual bool removeEndOfLine() = 0;
     KDRect cursorRect();
   protected:
     virtual void layoutSubviews() override;
-    virtual KDRect dirtyRectFromCursorPosition(size_t index, bool lineBreak) const;
-    void reloadRectFromCursorPosition(size_t index, bool lineBreak = false);
-    virtual KDRect characterFrameAtIndex(size_t index) const = 0;
+    void reloadRectFromPosition(const char * position, bool lineBreak = false);
+    virtual KDRect glyphFrameAtPosition(const char * position) const = 0;
     TextCursorView m_cursorView;
     const KDFont * m_font;
-    size_t m_cursorIndex;
+    const char * m_cursorTextLocation;
+    virtual KDRect dirtyRectFromPosition(const char * position, bool lineBreak) const;
   private:
     int numberOfSubviews() const override { return 1; }
     View * subviewAtIndex(int index) override {
-      assert(index == 1);
+      assert(index == 0);
       return &m_cursorView;
     }
     virtual size_t editedTextLength() const = 0;
@@ -53,14 +53,14 @@ protected:
   /* If the text to be appended is too long to be added without overflowing the
    * buffer, nothing is done (not even adding few letters from the text to reach
    * the maximum buffer capacity) and false is returned. */
-  bool insertTextAtLocation(const char * textBuffer, int location);
+  bool insertTextAtLocation(const char * textBuffer, const char * location);
   bool removeEndOfLine();
   ContentView * contentView() {
     return const_cast<ContentView *>(nonEditableContentView());
   }
   virtual const ContentView * nonEditableContentView() const = 0;
 private:
-  virtual void willSetCursorLocation(int * location) {}
+  virtual void willSetCursorTextLocation(const char * * location) {}
   virtual bool privateRemoveEndOfLine();
 };
 
diff --git a/escher/include/escher/text_input_helpers.h b/escher/include/escher/text_input_helpers.h
index 8eab24830..04718b4b5 100644
--- a/escher/include/escher/text_input_helpers.h
+++ b/escher/include/escher/text_input_helpers.h
@@ -6,11 +6,11 @@
 
 namespace TextInputHelpers {
 
-size_t CursorIndexInCommand(const char * text);
-/* Returns the index of the cursor position in a Command, which is the smallest
- * index between :
- *   - The first EmptyChar index (which is the position of the first argument)
- *   - The first empty quote
+const char * CursorPositionInCommand(const char * text);
+/* Returns the pointer to the char that should be right of the cursor, which is
+ * the first char between :
+ *   - The first EmptyChar (which is the position of the first argument)
+ *   - The char after the first empty quote
  *   - The end of the text */
 }
 
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 408dd2dbf..997227404 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -1,15 +1,15 @@
 #include <escher/text_area.h>
 #include <escher/clipboard.h>
 #include <escher/text_input_helpers.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <kandinsky/unicode/utf8_helper.h>
 
 #include <stddef.h>
 #include <assert.h>
 #include <limits.h>
 
-static inline size_t min(size_t a, size_t b) {
-  return (a>b ? b : a);
-}
+static inline size_t minSize(size_t a, size_t b) { return a < b ? a : b; }
+static inline size_t maxSize(size_t a, size_t b) { return a > b ? a : b; }
 
 /* TextArea */
 
@@ -21,26 +21,26 @@ TextArea::TextArea(Responder * parentResponder, View * contentView, const KDFont
 }
 
 bool TextArea::handleEventWithText(const char * text, bool indentation, bool forceCursorRightOfText) {
-  int nextCursorLocation = cursorLocation();
+  const char * nextCursorLocation = cursorTextLocation();
 
-  size_t cursorIndexInCommand = TextInputHelpers::CursorIndexInCommand(text);
+  const char * cursorPositionInCommand = TextInputHelpers::CursorPositionInCommand(text);
 
   constexpr int bufferSize = TextField::maxBufferSize();
   char buffer[bufferSize];
 
   // Remove the Empty code points
-  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, KDCodePointEmpty, &cursorIndexInCommand);
+  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, KDCodePointEmpty, &cursorPositionInCommand);
 
   // Insert the text
-  if ((indentation && insertTextWithIndentation(buffer, cursorLocation())) || insertTextAtLocation(buffer, cursorLocation())) {
+  if ((indentation && insertTextWithIndentation(buffer, cursorTextLocation())) || insertTextAtLocation(buffer, cursorTextLocation())) {
     // Set the cursor location
     if (forceCursorRightOfText) {
       nextCursorLocation += strlen(buffer);
     } else {
-      nextCursorLocation += cursorIndexInCommand;
+      nextCursorLocation += cursorPositionInCommand - text;
     }
   }
-  setCursorLocation(nextCursorLocation);
+  setCursorTextLocation(nextCursorLocation);
   return true;
 }
 
@@ -50,9 +50,20 @@ bool TextArea::handleEvent(Ion::Events::Event event) {
   } else if (handleBoxEvent(app(), event)) {
     return true;
   } else if (event == Ion::Events::Left) {
-    return setCursorLocation(cursorLocation()-1);
+    if (cursorTextLocation() <= text()) {
+      assert(cursorTextLocation() == text());
+      return false;
+    }
+    UTF8Decoder decoder(text(), cursorTextLocation());
+    decoder.previousCodePoint();
+    return setCursorTextLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Right) {
-    return setCursorLocation(cursorLocation()+1);
+    if (*cursorTextLocation() == 0) {
+      return false;
+    }
+    UTF8Decoder decoder(text(), cursorTextLocation());
+    decoder.nextCodePoint();
+    return setCursorTextLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Up) {
     contentView()->moveCursorGeo(0, -1);
   } else if (event == Ion::Events::Down) {
@@ -62,7 +73,7 @@ bool TextArea::handleEvent(Ion::Events::Event event) {
   } else if (event == Ion::Events::ShiftRight) {
     contentView()->moveCursorGeo(INT_MAX/2, 0);
   } else if (event == Ion::Events::Backspace) {
-    return removeChar();
+    return removeCodePoint();
   } else if (event.hasText()) {
     return handleEventWithText(event.text());
   } else if (event == Ion::Events::EXE) {
@@ -85,80 +96,75 @@ void TextArea::setText(char * textBuffer, size_t textBufferSize) {
   contentView()->moveCursorGeo(0, 0);
 }
 
-bool TextArea::insertTextWithIndentation(const char * textBuffer, int location) {
+bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * location) {
   int indentation = indentationBeforeCursor();
-  char spaceString[indentation+1];
-  for (int i = 0; i < indentation; i++) {
-    spaceString[i] = ' ';
+  const char * previousChar = cursorTextLocation()-1;
+  if (previousChar >= const_cast<TextArea *>(this)->contentView()->text() && *previousChar == ':') {
+    indentation += k_indentationSpaces;
   }
-  spaceString[indentation] = 0;
-  int spaceStringSize = strlen(spaceString);
   int textSize = strlen(textBuffer);
   int totalIndentationSize = 0;
-  for (size_t i = 0; i < strlen(textBuffer); i++) {
+  for (size_t i = 0; i < textSize; i++) {
+    // No need to use the UTF8Decoder here, because we look for an ASCII char.
     if (textBuffer[i] == '\n') {
-      totalIndentationSize+=spaceStringSize;
+      totalIndentationSize+= indentation;
     }
   }
   if (contentView()->getText()->textLength() + textSize + totalIndentationSize >= contentView()->getText()->bufferSize() || textSize == 0) {
     return false;
   }
-  int currentLocation = location;
-  for (size_t i = 0; i < strlen(textBuffer); i++) {
-    const char charString[] = {textBuffer[i], 0};
-    insertTextAtLocation(charString, currentLocation++);
-    if (textBuffer[i] == '\n') {
-      insertTextAtLocation(spaceString, currentLocation);
-      currentLocation += strlen(spaceString);
+  insertTextAtLocation(textBuffer, location);
+  const char * currentLocation = location;
+  int currentIndex = location - contentView()->text();
+  for (size_t i = 0; i < textSize; i++) {
+    // No need to use the UTF8Decoder here, because we look for an ASCII char.
+    if (textBuffer[currentIndex + i] == '\n') {
+      const_cast<Text *>(contentView()->getText())->insertSpacesAtLocation(indentation, const_cast<char *>(currentLocation));
+      currentIndex+= indentation;
     }
   }
   return true;
 }
 
 int TextArea::indentationBeforeCursor() const {
-  int charIndex = cursorLocation()-1;
+  const char * p = cursorTextLocation()-1;
   int indentationSize = 0;
-  while (charIndex >= 0 && nonEditableContentView()->text()[charIndex] != '\n') {
-    if (nonEditableContentView()->text()[charIndex] == ' ') {
+  // No need to use the UTF8Decoder here, be cause we look for an ASCII char.
+  while (p >= const_cast<TextArea *>(this)->contentView()->text() && *p != '\n') {
+    if (*p == ' ') {
       indentationSize++;
     } else {
       indentationSize = 0;
     }
-    charIndex--;
+    p--;
   }
   return indentationSize;
 }
 
 /* TextArea::Text */
 
-size_t TextArea::Text::indexAtPosition(Position p) {
+const char * TextArea::Text::pointerAtPosition(Position p) {
   assert(m_buffer != nullptr);
   if (p.line() < 0) {
-    return 0;
+    return m_buffer;
   }
   int y = 0;
-  const char * endOfLastLine = nullptr;
   for (Line l : *this) {
     if (p.line() == y) {
-      size_t x = p.column() < 0 ? 0 : p.column();
-      x = min(x, l.length());
-      return l.text() - m_buffer + x;
+      return l.text() + minSize(l.charLength(), maxSize(p.column(), 0));
     }
-    endOfLastLine = l.text() + l.length();
     y++;
   }
-  assert(endOfLastLine != nullptr && endOfLastLine >= m_buffer);
-  return endOfLastLine - m_buffer;
+  return m_buffer + strlen(m_buffer);
 }
 
-TextArea::Text::Position TextArea::Text::positionAtIndex(size_t index) const {
+TextArea::Text::Position TextArea::Text::positionAtPointer(const char * p) const {
   assert(m_buffer != nullptr);
-  assert(index < m_bufferSize);
-  const char * target = m_buffer + index;
+  assert(p <= m_buffer && p < m_buffer + m_bufferSize);
   size_t y = 0;
   for (Line l : *this) {
-    if (l.text() <= target && l.text() + l.length() >= target) {
-      size_t x = target - l.text();
+    if (l.contains(p)) {
+      size_t x = p - l.text();
       return Position(x, y);
     }
     y++;
@@ -167,56 +173,91 @@ TextArea::Text::Position TextArea::Text::positionAtIndex(size_t index) const {
   return Position(0, 0);
 }
 
-void TextArea::Text::insertChar(char c, size_t index) {
+void TextArea::Text::insertText(const char * s, int textLength, char * location) {
   assert(m_buffer != nullptr);
-  assert(index < m_bufferSize-1);
-  char previous = c;
-  for (size_t i=index; i<m_bufferSize; i++) {
-    char inserted = previous;
-    previous = m_buffer[i];
-    m_buffer[i] = inserted;
-    if (inserted == 0) {
-      break;
-    }
+  assert(location >= m_buffer && location < m_buffer + m_bufferSize - 1);
+  assert(strlen(m_buffer) + textLength < m_bufferSize);
+
+  size_t sizeToMove = strlen(location) + 1;
+  assert(location + textLength + sizeToMove <= m_buffer + m_bufferSize);
+  memmove(location + textLength, location, sizeToMove);
+  memmove(location, s, textLength);
+}
+
+void TextArea::Text::insertSpacesAtLocation(int numberOfSpaces, char * location) {
+  assert(m_buffer != nullptr);
+  assert(location >= m_buffer && location < m_buffer + m_bufferSize - 1);
+  assert(strlen(m_buffer) + numberOfSpaces < m_bufferSize);
+
+  size_t sizeToMove = strlen(location) + 1;
+  assert(location + numberOfSpaces + sizeToMove <= m_buffer + m_bufferSize);
+  memmove(location + numberOfSpaces, location, sizeToMove);
+  for (int i = 0; i < numberOfSpaces; i++) {
+    *(location+i) = ' ';
   }
 }
 
-char TextArea::Text::removeChar(size_t index) {
+CodePoint TextArea::Text::removeCodePoint(const char * * position) {
   assert(m_buffer != nullptr);
-  assert(index < m_bufferSize-1);
-  char deletedChar = m_buffer[index];
-  for (size_t i=index; i<m_bufferSize; i++) {
-    m_buffer[i] = m_buffer[i+1];
+  assert(m_buffer <= *position && *position < m_buffer + m_bufferSize);
+
+  // Find the beginning of the previous code point
+  UTF8Decoder decoder(m_buffer, *position);
+  CodePoint deletedCodePoint = decoder.previousCodePoint();
+  const char * newCursorLocation = decoder.stringPosition();
+  assert(newCursorLocation < *position);
+
+  // Shift the buffer
+  int codePointSize = *position - newCursorLocation;
+  assert(newCursorLocation >= m_buffer);
+  for (size_t i = newCursorLocation - m_buffer; i < m_bufferSize; i++) {
+    m_buffer[i] = m_buffer[i + codePointSize];
     if (m_buffer[i] == 0) {
       break;
     }
   }
-  return deletedChar;
+  // Set the new cursor position
+  *position = newCursorLocation;
+  return deletedCodePoint;
 }
 
-size_t TextArea::Text::removeRemainingLine(size_t index, int direction) {
+size_t TextArea::Text::removeRemainingLine(const char * location, int direction) {
   assert(m_buffer != nullptr);
-  assert(index < m_bufferSize);
-  int jump = index;
-  while (m_buffer[jump] != '\n' && m_buffer[jump] != 0 && jump >= 0) {
-    jump += direction;
+  assert(location >= m_buffer && location < m_buffer + m_bufferSize);
+
+  UTF8Decoder decoder(m_buffer, location);
+  const char * codePointPosition = decoder.stringPosition();
+  CodePoint nextCodePoint = direction > 0 ? decoder.nextCodePoint() : decoder.previousCodePoint();
+  if (direction < 0) {
+    codePointPosition = decoder.stringPosition();
   }
-  size_t delta = direction > 0 ? jump - index : index - jump;
+  while (nextCodePoint != '\n'
+      && ((direction > 0 && nextCodePoint != 0)
+        || (direction < 0 && codePointPosition >= m_buffer)))
+  {
+    if (direction > 0) {
+      codePointPosition = decoder.stringPosition();
+    }
+    nextCodePoint = direction > 0 ? decoder.nextCodePoint() : decoder.previousCodePoint();
+    if (direction < 0) {
+      codePointPosition = decoder.stringPosition();
+    }
+  }
+  size_t delta = direction > 0 ? codePointPosition - location : location - codePointPosition;
   if (delta == 0) {
     return 0;
   }
-  /* We stop at m_bufferSize-1 because:
-   * - if direction > 0: jump >= k+1 so we will reach the 0 before m_bufferSize-1
-   * - if direction < 0: k+1 will reach m_bufferSize. */
-  for (size_t k = index; k < m_bufferSize-1; k++) {
-    if (direction > 0) {
-      m_buffer[k] = m_buffer[jump++];
-    } else {
-      m_buffer[++jump] = m_buffer[k+1];
-    }
-    if (m_buffer[k] == 0 || m_buffer[k+1] == 0) {
+
+  char * dst = const_cast<char* >(direction > 0 ? location : codePointPosition);
+  char * src = const_cast<char* >(direction > 0 ? codePointPosition : location);
+  assert(src > dst);
+  for (size_t index = src - m_buffer; index < m_bufferSize; index++) {
+    *dst = *src;
+    if (*src == 0) {
       return delta;
     }
+    dst++;
+    src++;
   }
   assert(false);
   return 0;
@@ -226,41 +267,47 @@ size_t TextArea::Text::removeRemainingLine(size_t index, int direction) {
 
 TextArea::Text::Line::Line(const char * text) :
   m_text(text),
-  m_length(0)
+  m_charLength(0)
 {
   if (m_text != nullptr) {
+    // No need to use the UTF8Decoder here, because we look for an ASCII char.
     while (*text != 0 && *text != '\n') {
       text++;
     }
-    m_length = text-m_text;
+    m_charLength = text - m_text;
   }
 }
 
+KDCoordinate TextArea::Text::Line::glyphWidth(const KDFont * const font) const {
+  return font->stringSizeUntil(m_text, m_text + m_charLength).width();
+}
+
 bool TextArea::Text::Line::contains(const char * c) const {
-  return (c >= m_text) && (c < m_text + m_length);
+  return (c >= m_text) && (c < m_text + m_charLength);
 }
 
 /* TextArea::Text::LineIterator */
 
 TextArea::Text::LineIterator & TextArea::Text::LineIterator::operator++() {
-  const char * last = m_line.text() + m_line.length();
+  const char * last = m_line.text() + m_line.charLength();
   m_line = Line(*last == 0 ? nullptr : last+1);
   return *this;
 }
 
 /* TextArea::Text::Position */
 
-TextArea::Text::Position TextArea::Text::span() const {
+KDSize TextArea::Text::span(const KDFont * const font) const {
   assert(m_buffer != nullptr);
-  size_t width = 0;
-  size_t height = 0;
+  KDCoordinate width = 0;
+  int numberOfLines = 0;
   for (Line l : *this) {
-    if (l.length() > width) {
-      width = l.length();
+    KDCoordinate lineWidth = l.glyphWidth(font);
+    if (lineWidth > width) {
+      width = lineWidth;
     }
-    height++;
+    numberOfLines++;
   }
-  return Position(width, height);
+  return KDSize(width, numberOfLines * font->glyphSize().height());
 }
 
 /* TextArea::ContentView */
@@ -285,8 +332,9 @@ void TextArea::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
   int y = 0;
 
   for (Text::Line line : m_text) {
-    if (y >= topLeft.line() && y <= bottomRight.line() && topLeft.column() < (int)line.length()) {
-      drawLine(ctx, y, line.text(), line.length(), topLeft.column(), bottomRight.column());
+    KDCoordinate width = line.glyphWidth(m_font);
+    if (y >= topLeft.line() && y <= bottomRight.line() && topLeft.column() < (int)width) {
+      drawLine(ctx, y, line.text(), width, topLeft.column(), bottomRight.column());
     }
     y++;
   }
@@ -305,77 +353,97 @@ void TextArea::ContentView::drawStringAt(KDContext * ctx, int line, int column,
 }
 
 KDSize TextArea::ContentView::minimalSizeForOptimalDisplay() const {
-  KDSize glyphSize = m_font->glyphSize();
-  Text::Position span = m_text.span();
+  KDSize span = m_text.span(m_font);
   return KDSize(
     /* We take into account the space required to draw a cursor at the end of
      * line by adding glyphSize.width() to the width. */
-    glyphSize.width() * (span.column()+1),
-    glyphSize.height() * span.line()
+    span.width() + m_font->glyphSize().width(),
+    span.height()
   );
 }
 
 void TextArea::TextArea::ContentView::setText(char * textBuffer, size_t textBufferSize) {
   m_text.setText(textBuffer, textBufferSize);
-  m_cursorIndex = 0;
+  m_cursorTextLocation = text();
 }
 
-bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, int location) {
+bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, const char * location) {
   int textSize = strlen(text);
   if (m_text.textLength() + textSize >= m_text.bufferSize() || textSize == 0) {
     return false;
   }
   bool lineBreak = false;
-  int currentLocation = location;
-  while (*text != 0) {
-    lineBreak |= *text == '\n';
-    m_text.insertChar(*text++, currentLocation++);
+
+  // Scan for \n and 0
+  const char * textScanner = text;
+  while (*textScanner != 0) {
+    textScanner++;
+    lineBreak |= *textScanner == '\n';
   }
-  reloadRectFromCursorPosition(currentLocation-1, lineBreak);
+  assert(*textScanner == 0);
+  m_text.insertText(text, textScanner - text, const_cast<char *>(location));
+  reloadRectFromPosition(location/*-1 TODO  LEA */, lineBreak);
   return true;
 }
 
-bool TextArea::TextArea::ContentView::removeChar() {
-  if (cursorLocation() <= 0) {
+bool TextArea::TextArea::ContentView::removeCodePoint() {
+  if (cursorTextLocation() <= text()) {
+    assert(cursorTextLocation() == text());
     return false;
   }
   bool lineBreak = false;
-  assert(m_cursorIndex > 0);
-  lineBreak = m_text.removeChar(--m_cursorIndex) == '\n';
+  const char * cursorLoc = cursorTextLocation();
+  lineBreak = m_text.removeCodePoint(&cursorLoc) == '\n';
+  setCursorTextLocation(cursorLoc); // Update the cursor
   layoutSubviews(); // Reposition the cursor
-  reloadRectFromCursorPosition(cursorLocation(), lineBreak);
+  reloadRectFromPosition(cursorTextLocation(), lineBreak);
   return true;
 }
 
 bool TextArea::ContentView::removeEndOfLine() {
-  size_t removedLine = m_text.removeRemainingLine(cursorLocation(), 1);
+  size_t removedLine = m_text.removeRemainingLine(cursorTextLocation(), 1);
   if (removedLine > 0) {
     layoutSubviews();
-    reloadRectFromCursorPosition(cursorLocation(), false);
+    reloadRectFromPosition(cursorTextLocation(), false);
     return true;
   }
   return false;
 }
 
 bool TextArea::ContentView::removeStartOfLine() {
-  if (cursorLocation() <= 0) {
+  if (cursorTextLocation() <= text()) {
+    assert(cursorTextLocation() == text());
     return false;
   }
-  size_t removedLine = m_text.removeRemainingLine(cursorLocation()-1, -1);
+  size_t removedLine = m_text.removeRemainingLine(cursorTextLocation(), -1); //TODO LEA Before : cursorTextLocation()-1
   if (removedLine > 0) {
-    assert(m_cursorIndex >= removedLine);
-    setCursorLocation(cursorLocation()-removedLine);
-    reloadRectFromCursorPosition(cursorLocation(), false);
+    assert(cursorTextLocation() >= text() + removedLine);
+    setCursorTextLocation(cursorTextLocation() - removedLine);
+    reloadRectFromPosition(cursorTextLocation(), false);
     return true;
   }
   return false;
 }
 
-KDRect TextArea::ContentView::characterFrameAtIndex(size_t index) const {
+KDRect TextArea::ContentView::glyphFrameAtPosition(const char * position) const {
   KDSize glyphSize = m_font->glyphSize();
-  Text::Position p = m_text.positionAtIndex(index);
+  Text::Position p = m_text.positionAtPointer(position);
+
+  KDCoordinate x = 0;
+  bool found = false;
+  int y = 0;
+  for (Text::Line l : m_text) {
+    if (p.line() == y) {
+      x = m_font->stringSizeUntil(l.text(), position).width();
+      found = true;
+      break;
+    }
+    y++;
+  }
+  assert(found);
+
   return KDRect(
-    p.column() * glyphSize.width(),
+    x,
     p.line() * glyphSize.height(),
     glyphSize.width(),
     glyphSize.height()
@@ -383,6 +451,6 @@ KDRect TextArea::ContentView::characterFrameAtIndex(size_t index) const {
 }
 
 void TextArea::ContentView::moveCursorGeo(int deltaX, int deltaY) {
-  Text::Position p = m_text.positionAtIndex(m_cursorIndex);
-  setCursorLocation(m_text.indexAtPosition(Text::Position(p.column() + deltaX, p.line() + deltaY)));
+  Text::Position p = m_text.positionAtPointer(cursorTextLocation());
+  setCursorTextLocation(m_text.pointerAtPosition(Text::Position(p.column() + deltaX, p.line() + deltaY)));
 }
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 00322a610..d8150544f 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -1,9 +1,12 @@
 #include <escher/text_field.h>
 #include <escher/text_input_helpers.h>
 #include <escher/clipboard.h>
+#include <kandinsky/unicode/utf8_decoder.h>
 #include <kandinsky/unicode/utf8_helper.h>
 #include <assert.h>
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 /* TextField::ContentView */
 
 TextField::ContentView::ContentView(char * textBuffer, char * draftTextBuffer, size_t textBufferSize, const KDFont * font, float horizontalAlignment, float verticalAlignment, KDColor textColor, KDColor backgroundColor) :
@@ -19,6 +22,7 @@ TextField::ContentView::ContentView(char * textBuffer, char * draftTextBuffer, s
   m_backgroundColor(backgroundColor)
 {
   assert(m_textBufferSize <= k_maxBufferSize);
+  m_cursorTextLocation = draftTextBuffer;
 }
 
 void TextField::ContentView::setBackgroundColor(KDColor backgroundColor) {
@@ -41,31 +45,24 @@ void TextField::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
     backgroundColor = KDColorWhite;
   }
   ctx->fillRect(bounds(), backgroundColor);
-  ctx->drawString(text(), characterFrameAtIndex(0).origin(), m_font, m_textColor, backgroundColor);
+  ctx->drawString(text(), glyphFrameAtPosition(text()).origin(), m_font, m_textColor, backgroundColor);
 }
 
 const char * TextField::ContentView::text() const {
-  if (m_isEditing) {
-    return const_cast<const char *>(m_draftTextBuffer);
-  }
-  return const_cast<const char *>(m_textBuffer);
-}
-
-size_t TextField::ContentView::editedTextLength() const {
-  return m_currentDraftTextLength;
+  return const_cast<const char *>(m_isEditing ? m_draftTextBuffer : m_textBuffer);
 }
 
 void TextField::ContentView::setText(const char * text) {
-  reloadRectFromCursorPosition(0);
+  reloadRectFromPosition(m_textBuffer);
   size_t textRealLength = strlen(text);
-  int textLength = textRealLength >= m_textBufferSize ? m_textBufferSize-1 : textRealLength;
+  int textLength = minInt(textRealLength, m_textBufferSize - 1);
   // Copy the text
   strlcpy(m_isEditing ? m_draftTextBuffer : m_textBuffer, text, m_textBufferSize);
   // Update the draft text length and cursor location
   if (m_isEditing || m_textBuffer == m_draftTextBuffer) {
     m_currentDraftTextLength = textLength;
   }
-  reloadRectFromCursorPosition(0);
+  reloadRectFromPosition(m_textBuffer);
 }
 
 void TextField::ContentView::setAlignment(float horizontalAlignment, float verticalAlignment) {
@@ -88,82 +85,109 @@ void TextField::ContentView::setEditing(bool isEditing, bool reinitDrafBuffer) {
 }
 
 void TextField::ContentView::reinitDraftTextBuffer() {
-  setCursorLocation(0);
+  setCursorTextLocation(text());
   m_draftTextBuffer[0] = 0;
   m_currentDraftTextLength = 0;
 }
 
-bool TextField::ContentView::insertTextAtLocation(const char * text, int location) {
+bool TextField::ContentView::insertTextAtLocation(const char * text, const char * location) {
+  assert(m_isEditing);
+
   int textSize = strlen(text);
   if (m_currentDraftTextLength + textSize >= m_textBufferSize || textSize == 0) {
     return false;
   }
-  for (int k = m_currentDraftTextLength; k >= location && k >= 0; k--) {
-    m_draftTextBuffer[k+textSize] = m_draftTextBuffer[k];
-  }
+
+  memmove(const_cast<char *>(location + textSize), location, (m_draftTextBuffer + m_currentDraftTextLength + 1) - location);
 
   // Caution! One char will be overridden by the null-terminating char of strlcpy
-  int overridenCharLocation = location + strlen(text);
-  char overridenChar = m_draftTextBuffer[overridenCharLocation];
-  strlcpy(&m_draftTextBuffer[location], text, m_textBufferSize-location);
-  assert(overridenCharLocation < m_textBufferSize);
-  m_draftTextBuffer[overridenCharLocation] = overridenChar;
+  char * overridenCharLocation = const_cast<char *>(location + strlen(text));
+  char overridenChar = *overridenCharLocation;
+  strlcpy(const_cast<char *>(location), text, (m_draftTextBuffer + m_textBufferSize) - location);
+  assert(overridenCharLocation < m_draftTextBuffer + m_textBufferSize);
+  *overridenCharLocation = overridenChar;
   m_currentDraftTextLength += textSize;
 
-  for (size_t i = 0; i < m_currentDraftTextLength; i++) {
-    if (m_draftTextBuffer[i] == '\n') {
-      m_draftTextBuffer[i] = 0;
-      m_currentDraftTextLength = i;
+  UTF8Decoder decoder(m_draftTextBuffer);
+  const char * codePointPointer = decoder.stringPosition();
+  CodePoint codePoint = decoder.nextCodePoint();
+  assert(!codePoint.isCombining());
+  while (codePoint != KDCodePointNull) {
+    assert(codePointPointer < m_draftTextBuffer + m_textBufferSize);
+    if (codePoint == '\n') {
+      *(const_cast<char *>(codePointPointer)) = 0;
+      m_currentDraftTextLength = codePointPointer - m_draftTextBuffer;
       break;
     }
+    codePointPointer = decoder.stringPosition();
+    codePoint = decoder.nextCodePoint();
   }
-  reloadRectFromCursorPosition((m_horizontalAlignment == 0.0f ? location : 0));
+
+  reloadRectFromPosition(m_horizontalAlignment == 0.0f ? location : m_draftTextBuffer);
   return true;
 }
 
 KDSize TextField::ContentView::minimalSizeForOptimalDisplay() const {
-  KDSize glyphSize = m_font->glyphSize();
+  KDSize stringSize = m_font->stringSize(text());
+  assert(stringSize.height() == m_font->glyphSize().height());
   if (m_isEditing) {
-    return KDSize(glyphSize.width()*strlen(text())+m_cursorView.minimalSizeForOptimalDisplay().width(), glyphSize.height());
+    return KDSize(stringSize.width() + m_cursorView.minimalSizeForOptimalDisplay().width(), stringSize.height());
   }
-  return KDSize(glyphSize.width()*strlen(text()), glyphSize.height());
+  return stringSize;
 }
 
-bool TextField::ContentView::removeChar() {
-  if (cursorLocation() <= 0) {
+bool TextField::ContentView::removeCodePoint() {
+  assert(m_isEditing);
+  if (cursorTextLocation() <= m_draftTextBuffer) {
+    assert(cursorTextLocation() == m_draftTextBuffer);
     return false;
   }
-  m_currentDraftTextLength--;
+  UTF8Decoder decoder(m_draftTextBuffer, cursorTextLocation());
+  decoder.previousCodePoint();
+  const char * newCursorLocation = decoder.stringPosition();
+
+  assert(newCursorLocation < cursorTextLocation());
+  int removedCodePointLength = cursorTextLocation() - newCursorLocation;
+  m_currentDraftTextLength-= removedCodePointLength;
+
   if (m_horizontalAlignment > 0.0f) {
-    reloadRectFromCursorPosition(0);
+    reloadRectFromPosition(m_draftTextBuffer);
   }
-  setCursorLocation(cursorLocation()-1);
-  if( m_horizontalAlignment == 0.0f) {
-    reloadRectFromCursorPosition(cursorLocation());
+
+  setCursorTextLocation(newCursorLocation);
+  if (m_horizontalAlignment == 0.0f) {
+    reloadRectFromPosition(cursorTextLocation());
   }
-  for (size_t k = cursorLocation(); k < m_currentDraftTextLength; k++) {
-    m_draftTextBuffer[k] = m_draftTextBuffer[k+1];
+
+  for (char * k = const_cast<char *>(cursorTextLocation()); k < m_draftTextBuffer + m_currentDraftTextLength + removedCodePointLength; k++) {
+    *k = *(k+removedCodePointLength);
+    if (*k == 0) {
+      break;
+    }
   }
-  m_draftTextBuffer[m_currentDraftTextLength] = 0;
+
+  assert(m_draftTextBuffer[m_currentDraftTextLength] == 0);
   layoutSubviews();
   return true;
 }
 
 bool TextField::ContentView::removeEndOfLine() {
-  if (m_currentDraftTextLength == cursorLocation()) {
+  assert(m_isEditing);
+  if (m_currentDraftTextLength == cursorTextLocation() - m_draftTextBuffer) {
     return false;
   }
-  reloadRectFromCursorPosition((m_horizontalAlignment == 0.0f ? cursorLocation() : 0));
-  m_currentDraftTextLength = cursorLocation();
-  m_draftTextBuffer[cursorLocation()] = 0;
+  reloadRectFromPosition(m_horizontalAlignment == 0.0f ? cursorTextLocation() : m_draftTextBuffer);
+  m_currentDraftTextLength = cursorTextLocation() - m_draftTextBuffer;
+  *(const_cast<char *>(cursorTextLocation())) = 0;
   layoutSubviews();
   return true;
 }
 
 void TextField::ContentView::willModifyTextBuffer() {
+  assert(m_isEditing);
   /* This method should be called when the buffer is modified outside the
    * content view, for instance from the textfield directly. */
-  reloadRectFromCursorPosition(0);
+  reloadRectFromPosition(m_draftTextBuffer);
 }
 
 void TextField::ContentView::didModifyTextBuffer() {
@@ -181,11 +205,16 @@ void TextField::ContentView::layoutSubviews() {
   TextInput::ContentView::layoutSubviews();
 }
 
-KDRect TextField::ContentView::characterFrameAtIndex(size_t index) const {
+KDRect TextField::ContentView::glyphFrameAtPosition(const char * position) const {
+  assert(position != nullptr);
   KDSize glyphSize = m_font->glyphSize();
-  KDSize textSize = m_font->stringSize(text());
   KDCoordinate cursorWidth = m_cursorView.minimalSizeForOptimalDisplay().width();
-  return KDRect(m_horizontalAlignment*(m_frame.width() - textSize.width()-cursorWidth)+ index * glyphSize.width(), m_verticalAlignment*(m_frame.height() - glyphSize.height()), glyphSize);
+  KDCoordinate horizontalOffset = m_horizontalAlignment == 0.0f ? 0.0f :
+    m_horizontalAlignment * (m_frame.width() - m_font->stringSize(text()).width() - cursorWidth);
+  return KDRect(
+      horizontalOffset + m_font->stringSizeUntil(text(), position).width(),
+      m_verticalAlignment * (m_frame.height() - glyphSize.height()),
+      glyphSize);
 }
 
 /* TextField */
@@ -228,7 +257,7 @@ void TextField::setText(const char * text) {
   m_contentView.setText(text);
   /* Set the cursor location here and not in ContentView::setText so that
    * TextInput::willSetCursorLocation is called. */
-  setCursorLocation(strlen(text));
+  setCursorTextLocation(m_contentView.draftTextBuffer()+strlen(text));
 }
 
 void TextField::setAlignment(float horizontalAlignment, float verticalAlignment) {
@@ -252,7 +281,7 @@ bool TextField::privateHandleEvent(Ion::Events::Event event) {
   }
   if (isEditing() && shouldFinishEditing(event)) {
     char bufferText[ContentView::k_maxBufferSize];
-    int cursorLoc = cursorLocation();
+    const char * cursorLoc = cursorTextLocation();
     if (m_hasTwoBuffers) {
       strlcpy(bufferText, m_contentView.textBuffer(), ContentView::k_maxBufferSize);
       strlcpy(m_contentView.textBuffer(), m_contentView.draftTextBuffer(), m_contentView.bufferSize());
@@ -272,21 +301,26 @@ bool TextField::privateHandleEvent(Ion::Events::Event event) {
     }
     setEditing(true, false);
     if (m_hasTwoBuffers) {
-      /* if the text was refused (textInputDidFinishEditing returned false, we
+      /* If the text was refused (textInputDidFinishEditing returned false, we
        * reset the textfield in the same state as before */
       setText(m_contentView.textBuffer());
       strlcpy(m_contentView.textBuffer(), bufferText, ContentView::k_maxBufferSize);
-      setCursorLocation(cursorLoc);
+      setCursorTextLocation(cursorLoc);
     }
     return true;
   }
-  /* if move event was not caught before nor by textFieldShouldFinishEditing,
-   * we handle it here to avoid bubbling the event up. */
-  if ((event == Ion::Events::Up || event == Ion::Events::Down || event == Ion::Events::Left || event == Ion::Events::Right) && isEditing()) {
+  /* If a move event was not caught before, we handle it here to avoid bubbling
+   * the event up. */
+  if (isEditing()
+      && (event == Ion::Events::Up
+        || event == Ion::Events::Down
+        || event == Ion::Events::Left
+        || event == Ion::Events::Right))
+  {
     return true;
   }
   if (event == Ion::Events::Backspace && isEditing()) {
-    return removeChar();
+    return removeCodePoint();
   }
   if (event == Ion::Events::Back && isEditing()) {
     setEditing(false, m_hasTwoBuffers);
@@ -317,29 +351,31 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
     { "diff", 'x' }, { "int", 'x' },
     { "product", 'n' }, { "sum", 'n' }
   };
-  // Let's assume everything before the cursor is nested correctly, which is reasonable if the expression is being entered left-to-right.
+  /* Let's assume everything before the cursor is nested correctly, which is
+   * reasonable if the expression is being entered left-to-right. */
   const char * text = this->text();
-  /* TODO LEA
-  size_t location = cursorLocation();
+  const char * location = cursorTextLocation();
+  UTF8Decoder decoder(text, text + (location - m_contentView.draftTextBuffer()));
   unsigned level = 0;
-  while (location >= 1) {
-    location--;
-    switch (text[location]) {
+  while (location > m_contentView.draftTextBuffer()) {
+    CodePoint c = decoder.previousCodePoint();
+    location = decoder.stringPosition();
+    switch (c) {
       case '(':
         // Check if we are skipping to the next matching '('.
-        if (level) {
+        if (level > 0) {
           level--;
           break;
         }
         // Skip over whitespace.
-        while (location >= 1 && text[location-1] == ' ') {
-          location--;
+        while (location > m_contentView.draftTextBuffer() && decoder.previousCodePoint() == ' ') {
+          location = decoder.stringPosition();
         }
         // We found the next innermost function we are currently in.
         for (size_t i = 0; i < sizeof(sFunctions)/sizeof(sFunctions[0]); i++) {
           const char * name = sFunctions[i].name;
           size_t length = strlen(name);
-          if (location >= length && memcmp(&text[location-length], name, length) == 0) {
+          if (location >= (m_contentView.draftTextBuffer() + length) && memcmp(&text[(location - m_contentView.draftTextBuffer()) - length], name, length) == 0) {
             return sFunctions[i].xnt;
           }
         }
@@ -356,7 +392,7 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
         break;
     }
   }
-  */
+
   // Fallback to the default
   return defaultXNTCodePoint;
 }
@@ -390,17 +426,22 @@ void TextField::scrollToCursor() {
 }
 
 bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Left && isEditing() && cursorLocation() > 0) {
-    return setCursorLocation(cursorLocation()-1);
+  assert(isEditing());
+  if (event == Ion::Events::Left && isEditing() && cursorTextLocation() > m_contentView.draftTextBuffer()) {
+    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
+    decoder.previousCodePoint();
+    return setCursorTextLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftLeft && isEditing()) {
-    return setCursorLocation(0);
+    return setCursorTextLocation(m_contentView.draftTextBuffer());
   }
-  if (event == Ion::Events::Right && isEditing() && cursorLocation() < draftTextLength()) {
-    return setCursorLocation(cursorLocation()+1);
+  if (event == Ion::Events::Right && isEditing() && cursorTextLocation() < m_contentView.draftTextBuffer() + draftTextLength()) {
+    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
+    decoder.nextCodePoint();
+    return setCursorTextLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftRight && isEditing()) {
-    return setCursorLocation(draftTextLength());
+    return setCursorTextLocation(m_contentView.draftTextBuffer() + draftTextLength());
   }
   return false;
 }
@@ -412,8 +453,11 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
     setEditing(true);
   }
 
+  assert(isEditing());
+
   if (eventText[0] == 0) {
-    setCursorLocation(0);
+    assert(false); // TODO LEA Does this ever happen?
+    setCursorTextLocation(m_contentView.draftTextBuffer());
     return m_delegate->textFieldDidHandleEvent(this, true, previousTextLength != 0);
   }
 
@@ -422,19 +466,19 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
   char buffer[bufferSize];
   UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, eventText, KDCodePointEmpty);
 
-  int nextCursorLocation = draftTextLength();
-  if (insertTextAtLocation(buffer, cursorLocation())) {
+  const char * nextCursorLocation = m_contentView.draftTextBuffer() + draftTextLength();
+  if (insertTextAtLocation(buffer, cursorTextLocation())) {
     /* The cursor position depends on the text as we sometimes want to position
      * the cursor at the end of the text and sometimes after the first
      * parenthesis. */
-    nextCursorLocation = cursorLocation();
+    nextCursorLocation = cursorTextLocation();
     if (forceCursorRightOfText) {
       nextCursorLocation+= strlen(buffer);
     } else {
-      nextCursorLocation+= TextInputHelpers::CursorIndexInCommand(eventText);
+      nextCursorLocation+= TextInputHelpers::CursorPositionInCommand(eventText) - eventText;
     }
   }
-  setCursorLocation(nextCursorLocation);
+  setCursorTextLocation(nextCursorLocation);
   return m_delegate->textFieldDidHandleEvent(this, true, strlen(text()) != previousTextLength);
 }
 
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index dee7c1f79..a8327b801 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -3,10 +3,14 @@
 
 /* TextInput::ContentView */
 
-void TextInput::ContentView::setCursorLocation(int location) {
-  assert(location >= 0);
-  int adjustedLocation = location > (signed int)editedTextLength() ? (signed int)editedTextLength() : location;
-  m_cursorIndex = adjustedLocation;
+static inline const char * min(const char * x, const char * y) { return x < y ? x : y; } // TODO LEA check this compiles OK
+static inline const char * max(const char * x, const char * y) { return x > y ? x : y; } // TODO LEA check this compiles OK
+
+void TextInput::ContentView::setCursorTextLocation(const char * location) {
+  assert(location != nullptr);
+  assert(location >= text());
+  const char * adjustedLocation = min(location, text() + editedTextLength()); // TODO LEA check this complies OK
+  m_cursorTextLocation = adjustedLocation;
   layoutSubviews();
 }
 
@@ -16,30 +20,38 @@ void TextInput::ContentView::setFont(const KDFont * font) {
 }
 
 KDRect TextInput::ContentView::cursorRect() {
-  return characterFrameAtIndex(m_cursorIndex);
+  return glyphFrameAtPosition(m_cursorTextLocation);
 }
 
 void TextInput::ContentView::layoutSubviews() {
   m_cursorView.setFrame(cursorRect());
 }
 
-KDRect TextInput::ContentView::dirtyRectFromCursorPosition(size_t index, bool lineBreak) const {
-  KDRect charRect = characterFrameAtIndex(index);
-  KDRect dirtyRect = KDRect(charRect.x(), charRect.y(), bounds().width() - charRect.x(), charRect.height());
+void TextInput::ContentView::reloadRectFromPosition(const char * position, bool lineBreak) {
+  markRectAsDirty(dirtyRectFromPosition(position, lineBreak));
+}
+
+KDRect TextInput::ContentView::dirtyRectFromPosition(const char * position, bool lineBreak) const {
+  KDRect glyphRect = glyphFrameAtPosition(position);
+  KDRect dirtyRect = KDRect(
+      glyphRect.x(),
+      glyphRect.y(),
+      bounds().width() - glyphRect.x(),
+      glyphRect.height());
   if (lineBreak) {
-    dirtyRect = dirtyRect.unionedWith(KDRect(0, charRect.bottom()+1, bounds().width(), bounds().height()-charRect.bottom()-1));
+    dirtyRect = dirtyRect.unionedWith(
+        KDRect(0,
+          glyphRect.bottom() + 1,
+          bounds().width(),
+          bounds().height() - glyphRect.bottom() - 1));
   }
   return dirtyRect;
 }
 
-void TextInput::ContentView::reloadRectFromCursorPosition(size_t index, bool lineBreak) {
-  markRectAsDirty(dirtyRectFromCursorPosition(index, lineBreak));
-}
-
 /* TextInput */
 
-bool TextInput::removeChar() {
-  contentView()->removeChar();
+bool TextInput::removeCodePoint() {
+  contentView()->removeCodePoint();
   scrollToCursor();
   return true;
 }
@@ -56,15 +68,16 @@ void TextInput::scrollToCursor() {
   scrollToContentRect(contentView()->cursorRect(), true);
 }
 
-bool TextInput::setCursorLocation(int location) {
-  int adjustedLocation = location < 0 ? 0 : location;
-  willSetCursorLocation(&adjustedLocation);
-  contentView()->setCursorLocation(adjustedLocation);
+bool TextInput::setCursorTextLocation(const char * location) {
+  assert(location != nullptr);
+  const char * adjustedLocation = max(location, text());
+  willSetCursorTextLocation(&adjustedLocation);
+  contentView()->setCursorTextLocation(adjustedLocation);
   scrollToCursor();
   return true;
 }
 
-bool TextInput::insertTextAtLocation(const char * text, int location) {
+bool TextInput::insertTextAtLocation(const char * text, const char * location) {
   if (contentView()->insertTextAtLocation(text, location)) {
     /* We layout the scrollable view before scrolling to cursor because the
      * content size might have changed. */
diff --git a/escher/src/text_input_helpers.cpp b/escher/src/text_input_helpers.cpp
index 5a653c3d3..436a076f6 100644
--- a/escher/src/text_input_helpers.cpp
+++ b/escher/src/text_input_helpers.cpp
@@ -4,34 +4,28 @@
 
 namespace TextInputHelpers {
 
-size_t CursorIndexInCommand(const char * text) {
-  size_t index = 0;
+const char * CursorPositionInCommand(const char * text) {
   UTF8Decoder decoder(text);
   const char * currentPointer = text;
   CodePoint codePoint = decoder.nextCodePoint();
-  const char * nextPointer = decoder.stringPosition();
   while (codePoint != KDCodePointNull) {
     if (codePoint == KDCodePointEmpty) {
-      return index;
+      return currentPointer;
     }
     //TODO make sure changing empty / ' order was OK
     if (codePoint == '\'') {
-      index+= nextPointer - currentPointer;
-      currentPointer = nextPointer;
+      currentPointer = decoder.stringPosition();
       codePoint = decoder.nextCodePoint();
-      nextPointer = decoder.stringPosition();
       if (codePoint == '\'') {
-        return index;
+        return currentPointer;
       }
       // Continue because we already incremented codePoint
       continue;
     }
-    index+= nextPointer - currentPointer;
-    currentPointer = nextPointer;
+    currentPointer = decoder.stringPosition();
     codePoint = decoder.nextCodePoint();
-    nextPointer = decoder.stringPosition();
   }
-  return index;
+  return currentPointer;
 }
 
 }
diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 1e5c296be..164dce2c8 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -32,7 +32,10 @@ public:
   static constexpr const KDFont * LargeFont = &privateLargeFont;
   static constexpr const KDFont * SmallFont = &privateSmallFont;
 
-  KDSize stringSize(const char * text) const;
+  KDSize stringSize(const char * text) const {
+    return stringSizeUntil(text, nullptr);
+  }
+  KDSize stringSizeUntil(const char * text, const char * limit) const;
 
   union GlyphBuffer {
   public:
diff --git a/kandinsky/include/kandinsky/unicode/utf8_decoder.h b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
index 084765b9f..d9884f7fb 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_decoder.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_decoder.h
@@ -1,8 +1,9 @@
 #ifndef KANDINSKY_UNICODE_UTF8_DECODER_H
 #define KANDINSKY_UNICODE_UTF8_DECODER_H
 
-#include <stddef.h>
 #include "code_point.h"
+#include <stddef.h>
+#include <assert.h>
 
 /* UTF-8 encodes all valid code points using at most 4 bytes (= 28 bits), the
  * lowest codes being equal to ASCII codes. There are less than 2^21 different
@@ -17,13 +18,20 @@
 
 class UTF8Decoder {
 public:
-  UTF8Decoder(const char * string) : m_string(string) {}
+  UTF8Decoder(const char * string, const char * initialPosition = nullptr) :
+    m_string(string),
+    m_stringPosition(initialPosition == nullptr ? string : initialPosition)
+  {
+    assert(m_string != nullptr);
+  }
   CodePoint nextCodePoint();
-  const char * stringPosition() const { return m_string; }
+  CodePoint previousCodePoint();
+  const char * stringPosition() const { return m_stringPosition; }
   static size_t CharSizeOfCodePoint(CodePoint c);
   static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
 private:
-  const char * m_string;
+  const char * const m_string;
+  const char * m_stringPosition;
 };
 
 #endif
diff --git a/kandinsky/include/kandinsky/unicode/utf8_helper.h b/kandinsky/include/kandinsky/unicode/utf8_helper.h
index 70f4edc2a..5d7c7d4a9 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_helper.h
+++ b/kandinsky/include/kandinsky/unicode/utf8_helper.h
@@ -10,7 +10,7 @@ const char * CodePointSearch(const char * s, CodePoint c);
 /* CopyAndRemoveCodePoint copies src into dst while removing all code points c.
  * It also updates an index that should be lower if code points where removed
  * before it. */
-void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, size_t * indexToDUpdate = nullptr);
+void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
 };
 
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index a921b4a4b..93a07f9b3 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -5,25 +5,26 @@
 
 constexpr static int k_tabCharacterWidth = 4;
 
-KDSize KDFont::stringSize(const char * text) const {
+KDSize KDFont::stringSizeUntil(const char * text, const char * limit) const {
   if (text == nullptr) {
     return KDSizeZero;
   }
   KDSize stringSize = KDSize(0, m_glyphSize.height());
 
   UTF8Decoder decoder(text);
+  const char * currentStringPosition = decoder.stringPosition();
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != KDCodePointNull) {
+  while (codePoint != KDCodePointNull && (limit == nullptr || currentStringPosition < limit)) {
     KDSize cSize = KDSize(m_glyphSize.width(), 0);
     if (codePoint == KDCodePointLineFeed) {
       cSize = KDSize(0, m_glyphSize.height());
-      codePoint = decoder.nextCodePoint();
     } else if (codePoint == KDCodePointTabulation) {
-      cSize = KDSize(k_tabCharacterWidth*m_glyphSize.width(), 0);
+      cSize = KDSize(k_tabCharacterWidth * m_glyphSize.width(), 0);
     } else if (codePoint.isCombining()) {
       cSize = KDSizeZero;
     }
-    stringSize = KDSize(stringSize.width()+cSize.width(), stringSize.height()+cSize.height());
+    stringSize = KDSize(stringSize.width() + cSize.width(), stringSize.height() + cSize.height());
+    currentStringPosition = decoder.stringPosition();
     codePoint = decoder.nextCodePoint();
   }
   return stringSize;
diff --git a/kandinsky/src/unicode/utf8_decoder.cpp b/kandinsky/src/unicode/utf8_decoder.cpp
index 5b23cbdb2..1c5f65f5f 100644
--- a/kandinsky/src/unicode/utf8_decoder.cpp
+++ b/kandinsky/src/unicode/utf8_decoder.cpp
@@ -16,15 +16,45 @@ static inline uint8_t last_k_bits(uint8_t value, uint8_t bits) {
 }
 
 CodePoint UTF8Decoder::nextCodePoint() {
-  int leadingOnes = leading_ones(*m_string);
-  uint32_t result = last_k_bits(*m_string++, 8-leadingOnes-1);
-  for (int i=0; i<(leadingOnes-1); i++) {
+  assert(m_stringPosition == m_stringPosition || *(m_stringPosition - 1) != 0);
+  int leadingOnes = leading_ones(*m_stringPosition);
+  uint32_t result = last_k_bits(*m_stringPosition++, 8-leadingOnes-1);
+  for (int i = 0; i < leadingOnes - 1; i++) {
     result <<= 6;
-    result += (*m_string++ & 0x3F);
+    result += (*m_stringPosition++ & 0x3F);
   }
   return CodePoint(result);
 }
 
+CodePoint UTF8Decoder::previousCodePoint() {
+  assert(m_stringPosition > m_string);
+  if (leading_ones(*(m_stringPosition - 1)) == 0) {
+    // The current code point is one char long
+    m_stringPosition--;
+    return *m_stringPosition;
+  }
+  // The current code point spans over multiple chars
+  uint32_t result = 0;
+  int i = 0;
+  int leadingOnes = 1;
+  m_stringPosition--;
+  assert(leading_ones(*m_stringPosition) == 1);
+  while (leadingOnes == 1) {
+    assert(m_stringPosition > m_string);
+    result += (*m_stringPosition & 0x3F) << (6 * i);
+    i++;
+    m_stringPosition--;
+    leadingOnes = leading_ones(*m_stringPosition);
+  }
+
+  assert(i <= 3);
+  assert(leadingOnes > 1 && leadingOnes <= 4);
+  assert(m_stringPosition >= m_string);
+
+  result+= last_k_bits(*m_stringPosition, 8-leadingOnes-1);
+  return CodePoint(result);
+}
+
 size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
   constexpr int bufferSize = CodePoint::MaxCodePointCharLength;
   char buffer[bufferSize];
diff --git a/kandinsky/src/unicode/utf8_helper.cpp b/kandinsky/src/unicode/utf8_helper.cpp
index da2d47f2b..4a984d1a7 100644
--- a/kandinsky/src/unicode/utf8_helper.cpp
+++ b/kandinsky/src/unicode/utf8_helper.cpp
@@ -23,7 +23,7 @@ const char * CodePointSearch(const char * s, CodePoint c) {
   return nullptr;
 }
 
-void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, size_t * indexToUpdate) {
+void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * pointerToUpdate) {
   UTF8Decoder decoder(src);
   const char * currentPointer = src;
   const char * maxPointer = src + strlen(src) + 1;
@@ -38,9 +38,9 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
       int copySize = min(nextPointer - currentPointer, dstSize - bufferIndex);
       memcpy(dst + bufferIndex, currentPointer, copySize);
       bufferIndex+= copySize;
-    } else if (indexToUpdate != nullptr && currentPointer - src < *indexToUpdate) {
-      assert(*indexToUpdate >= codePointCharSize);
-      *indexToUpdate-= codePointCharSize;
+    } else if (pointerToUpdate != nullptr && currentPointer < *pointerToUpdate) {
+      assert(*pointerToUpdate - src >= codePointCharSize);
+      *pointerToUpdate = *pointerToUpdate - codePointCharSize;
     }
     currentPointer = nextPointer;
     codePoint = decoder.nextCodePoint();

From f0e8196016acefd543de28e18a667e6b33343e56 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 22 Jan 2019 15:21:20 +0100
Subject: [PATCH 036/295] [escher] Fix text field and text area navigation

---
 escher/include/escher/text_area.h | 1 +
 escher/src/text_area.cpp          | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 2e60c9d52..8bcb1a0b0 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -98,6 +98,7 @@ protected:
       TextInput::ContentView(font),
       m_text(nullptr, 0)
     {
+      m_cursorTextLocation = m_text.text();
     }
     void drawRect(KDContext * ctx, KDRect rect) const override;
     void drawStringAt(KDContext * ctx, int line, int column, const char * text, size_t length, KDColor textColor, KDColor backgroundColor) const;
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 997227404..f53374500 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -160,7 +160,7 @@ const char * TextArea::Text::pointerAtPosition(Position p) {
 
 TextArea::Text::Position TextArea::Text::positionAtPointer(const char * p) const {
   assert(m_buffer != nullptr);
-  assert(p <= m_buffer && p < m_buffer + m_bufferSize);
+  assert(m_buffer <= p && p < m_buffer + m_bufferSize);
   size_t y = 0;
   for (Line l : *this) {
     if (l.contains(p)) {
@@ -283,7 +283,9 @@ KDCoordinate TextArea::Text::Line::glyphWidth(const KDFont * const font) const {
 }
 
 bool TextArea::Text::Line::contains(const char * c) const {
-  return (c >= m_text) && (c < m_text + m_charLength);
+  return (c >= m_text)
+    && ((c < m_text + m_charLength)
+        || (c == m_text + m_charLength && (*c == 0 || *c == '\n'))) ;
 }
 
 /* TextArea::Text::LineIterator */

From 76e6860f832868b78953bc6a9c2c967123d72b89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 22 Jan 2019 15:25:50 +0100
Subject: [PATCH 037/295] Remove TODOs

---
 escher/src/text_input.cpp |  6 +++---
 poincare/test/helper.cpp  | 20 --------------------
 2 files changed, 3 insertions(+), 23 deletions(-)

diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index a8327b801..f8131c21b 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -3,13 +3,13 @@
 
 /* TextInput::ContentView */
 
-static inline const char * min(const char * x, const char * y) { return x < y ? x : y; } // TODO LEA check this compiles OK
-static inline const char * max(const char * x, const char * y) { return x > y ? x : y; } // TODO LEA check this compiles OK
+static inline const char * min(const char * x, const char * y) { return x < y ? x : y; }
+static inline const char * max(const char * x, const char * y) { return x > y ? x : y; }
 
 void TextInput::ContentView::setCursorTextLocation(const char * location) {
   assert(location != nullptr);
   assert(location >= text());
-  const char * adjustedLocation = min(location, text() + editedTextLength()); // TODO LEA check this complies OK
+  const char * adjustedLocation = min(location, text() + editedTextLength());
   m_cursorTextLocation = adjustedLocation;
   layoutSubviews();
 }
diff --git a/poincare/test/helper.cpp b/poincare/test/helper.cpp
index e8afad338..ee9a2149d 100644
--- a/poincare/test/helper.cpp
+++ b/poincare/test/helper.cpp
@@ -41,26 +41,6 @@ bool expressions_are_equal(Poincare::Expression expected, Poincare::Expression g
   return identical;
 }
 
-/*TODO LEA
- *void translate_in_ASCII_chars(char * expression) {
-  for (char *c = expression; *c; c++) {
-    switch (*c) {
-      case Ion::Charset::Exponent: *c = 'E'; break;
-      case KDCodePointScriptSmallE: *c = 'X'; break;
-      case KDCodePointMathematicalBoldSmallI: *c = 'I'; break;
-      case Ion::Charset::Root: *c = 'R'; break;
-      case KDCodePointGreekSmallLetterPi: *c = 'P'; break;
-      case Ion::Charset::MultiplicationSign: *c = '*'; break;
-      case KDCodePointMiddleDot: *c = '*'; break;
-      case Ion::Charset::Sto: *c = '>'; break;
-      case Poincare::Symbol::SpecialSymbols::UnknownX: *c = '?'; break;
-      case Ion::Charset::LeftSuperscript: *c = '$'; break;
-      case Ion::Charset::RightSuperscript: *c = '#'; break;
-    }
-  }
-}
-*/
-
 Expression parse_expression(const char * expression, bool canBeUnparsable) {
   quiz_print(expression);
   Expression result = Expression::Parse(expression);

From 6b6d3d7fe2d4b96b4592b11ede4788f99a3376fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 22 Jan 2019 16:27:34 +0100
Subject: [PATCH 038/295] [tests] Fix unicode for tests

---
 apps/calculation/test/calculation_store.cpp  |  38 +-
 apps/solver/test/equation_store.cpp          |  82 +--
 kandinsky/test/utf8decoder.cpp               |  15 -
 poincare/src/decimal.cpp                     |   2 +-
 poincare/src/print_float.cpp                 |  10 +-
 poincare/test/addition.cpp                   |  32 +-
 poincare/test/complex.cpp                    | 182 +++---
 poincare/test/complex_to_expression.cpp      |  94 ++--
 poincare/test/convert_expression_to_text.cpp | 168 +++---
 poincare/test/decimal.cpp                    |   8 +-
 poincare/test/division.cpp                   |  12 +-
 poincare/test/factorial.cpp                  |   4 +-
 poincare/test/float.cpp                      |  12 +-
 poincare/test/function.cpp                   | 128 ++---
 poincare/test/infinity.cpp                   |  24 +-
 poincare/test/layouts.cpp                    |   2 +-
 poincare/test/logarithm.cpp                  |  42 +-
 poincare/test/multiplication.cpp             |  84 +--
 poincare/test/number.cpp                     |   8 +-
 poincare/test/parser.cpp                     | 184 +++---
 poincare/test/power.cpp                      | 120 ++--
 poincare/test/properties.cpp                 |  76 +--
 poincare/test/rational.cpp                   |   8 +-
 poincare/test/simplify.cpp                   |  86 +--
 poincare/test/store.cpp                      |  30 +-
 poincare/test/subtraction.cpp                |   8 +-
 poincare/test/symbol.cpp                     |  14 +-
 poincare/test/trigo.cpp                      | 556 +++++++++----------
 poincare/test/user_variable.cpp              |  81 +--
 poincare/test/vertical_offset_layout.cpp     |   4 +-
 30 files changed, 1057 insertions(+), 1057 deletions(-)
 delete mode 100644 kandinsky/test/utf8decoder.cpp

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index c64fdd9ac..e241fc4b5 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -97,13 +97,13 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   assertCalculationDisplay("[[1,2,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("[[1,x,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("28^7", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("3+R(2)>a", false, false, ::Calculation::Calculation::EqualSign::Approximation, "R(2)+3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("3+√(2)→a", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(2)+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3+2>a", false, true, ::Calculation::Calculation::EqualSign::Equal, "5", "5", &globalContext, &store);
+  assertCalculationDisplay("3+2→a", false, true, ::Calculation::Calculation::EqualSign::Equal, "5", "5", &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3>a", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
+  assertCalculationDisplay("3→a", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3+x>f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x+3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("3+x→f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 }
 
@@ -112,31 +112,31 @@ QUIZ_CASE(calculation_complex_format) {
   CalculationStore store;
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Real);
-  assertCalculationDisplay("1+I", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+I", &globalContext, &store);
-  assertCalculationDisplay("R(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, "unreal", nullptr, &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
+  assertCalculationDisplay("√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, "unreal", nullptr, &globalContext, &store);
   assertCalculationDisplay("ln(-2)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
-  assertCalculationDisplay("R(-1)*R(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
   assertCalculationDisplay("(-8)^(1/3)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-2", &globalContext, &store);
   assertCalculationDisplay("(-8)^(2/3)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "4", &globalContext, &store);
   assertCalculationDisplay("(-2)^(1/4)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Cartesian);
-  assertCalculationDisplay("1+I", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+I", &globalContext, &store);
-  assertCalculationDisplay("R(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "I", &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
+  assertCalculationDisplay("√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "𝐢", &globalContext, &store);
   assertCalculationDisplay("ln(-2)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("R(-1)*R(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-1", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "1+R(3)*I", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "-2+2*R(3)*I", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(8,4)/2+root(8,4)/2*I", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-1", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "1+√(3)×𝐢", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "-2+2×√(3)×𝐢", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(8,4)/2+root(8,4)/2×𝐢", nullptr, &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Polar);
-  assertCalculationDisplay("1+I", false, false, ::Calculation::Calculation::EqualSign::Approximation, "R(2)*X^(P/4*I)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("R(-1)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "X^(P/2*I)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(2)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ℯ^(π/2×𝐢)", nullptr, &globalContext, &store);
   assertCalculationDisplay("ln(-2)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("R(-1)*R(-1)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "X^(3.1415926535898*I)", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "2*X^(P/3*I)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "4*X^((2*P)/3*I)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(2,4)*X^(P/4*I)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "ℯ^(3.1415926535898×𝐢)", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "2×ℯ^(π/3×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "4×ℯ^((2×π)/3×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(2,4)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Cartesian);
 }
diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index 2053defb6..bd86b7569 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -36,8 +36,11 @@ void assert_equation_system_exact_solve_to(const char * equations[], EquationSto
   } else {
     quiz_assert(strcmp(equationStore.variableAtIndex(0), variables[0]) == 0);
   }
+  constexpr int bufferSize = 200;
+  char buffer[bufferSize];
   for (int i = 0; i < numberOfSolutions; i++) {
-    quiz_assert(strcmp(equationStore.exactSolutionLayoutAtIndex(i, true), solutions[i]) == 0);
+    equationStore.exactSolutionLayoutAtIndex(i, true).serializeForParsing(buffer, bufferSize);
+    quiz_assert(strcmp(buffer, solutions[i]) == 0);
   }
 }
 
@@ -95,29 +98,34 @@ QUIZ_CASE(equation_solve) {
   assert_equation_system_exact_solve_to(equations7,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions7, 1);
 
   // 3x^2-4x+4=2
-  const char * equations8[] = {"3*x^2-4x+4=2", 0};
-  const char * solutions8[] = {"(2)/(3)-(R(2))/(3)*I","(2)/(3)+(R(2))/(3)*I", "-8"};
+  const char * equations8[] = {"3×x^2-4x+4=2", 0};
+  const char * solutions8[] = {"(2)/(3)-(√(2))/(3)·𝐢","(2)/(3)+(√(2))/(3)·𝐢", "-8"};
   assert_equation_system_exact_solve_to(equations8, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions8, 3);
 
-  // 2*x^2-4*x+4=3
-  const char * equations9[] = {"2*x^2-4*x+4=3", 0};
-  const char * solutions9[] = {"(-R(2)+2)/(2)","(R(2)+2)/(2)", "8"};
+  // 2×x^2-4×x+4=3
+  const char * equations9[] = {"2×x^2-4×x+4=3", 0};
+  const char * solutions9[] = {"(-√(2)+2)/(2)","(√(2)+2)/(2)", "8"};
   assert_equation_system_exact_solve_to(equations9, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions9, 3);
 
-  // 2*x^2-4*x+2=0
-  const char * equations10[] = {"2*x^2-4*x+2=0", 0};
+  // 2×x^2-4×x+2=0
+  const char * equations10[] = {"2×x^2-4×x+2=0", 0};
   const char * solutions10[] = {"1", "0"};
   assert_equation_system_exact_solve_to(equations10, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions10, 2);
 
-  // x^2+x+1=3*x^2+pi*x-R(5)
-  const char * equations11[] = {"x^2+x+1=3*x^2+P*x-R(5)", 0};
-  const char * solutions11[] = {"(R(P$2#-2*P+8*R(5)+9)-P+1)/(4)", "(-R(P$2#-2*P+8*R(5)+9)-P+1)/(4)", "P$2#-2*P+8*R(5)+9"};
+  quiz_assert(KDCodePointLeftSuperscript == '\022');
+  quiz_assert(KDCodePointLeftSuperscript == '\x12');
+  quiz_assert(KDCodePointRightSuperscript == '\023');
+  quiz_assert(KDCodePointRightSuperscript == '\x13');
+
+  // x^2+x+1=3×x^2+pi×x-√(5)
+  const char * equations11[] = {"x^2+x+1=3×x^2+π×x-√(5)", 0};
+  const char * solutions11[] = {"(√(π\0222\023-2·π+8·√(5)+9)-π+1)/(4)", "(-√(π\0222\023-2·π+8·√(5)+9)-π+1)/(4)", "π\0222\023-2·π+8·√(5)+9"};
   assert_equation_system_exact_solve_to(equations11, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions11, 3);
 
   // TODO
   // x^3 - 4x^2 + 6x - 24 = 0
-  //const char * equations10[] = {"2*x^2-4*x+4=3", 0};
-  //assert_equation_system_exact_solve_to(equations10, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, {"x", ""}, {"4", "I*R(6)", "-I*R(6)", "-11616"}, 4);
+  //const char * equations10[] = {"2×x^2-4×x+4=3", 0};
+  //assert_equation_system_exact_solve_to(equations10, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, {"x", ""}, {"4", "𝐢×√(6)", "-𝐢×√(6)", "-11616"}, 4);
 
   //x^3+x^2+1=0
   // x^3-3x-2=0
@@ -134,8 +142,8 @@ QUIZ_CASE(equation_solve) {
 
   const char * variablesxyz[] = {"x", "y", "z", ""};
 
-  const char * equations14[] = {"x+y=0", "3x+y+z=-5", "4z-P=0", 0};
-  const char * solutions14[] = {"(-P-20)/(8)", "(P+20)/(8)", "(P)/(4)"};
+  const char * equations14[] = {"x+y=0", "3x+y+z=-5", "4z-π=0", 0};
+  const char * solutions14[] = {"(-π-20)/(8)", "(π+20)/(8)", "(π)/(4)"};
   assert_equation_system_exact_solve_to(equations14,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesxyz, solutions14, 3);
 
   // Monovariable non-polynomial equation
@@ -146,7 +154,7 @@ QUIZ_CASE(equation_solve) {
   assert_equation_approximate_solve_to("cos(x)=0", -900.0, 1000.0, "x", solutions16, 10, true);
 
   double solutions17[] = {0};
-  assert_equation_approximate_solve_to("R(y)=0", -900.0, 1000.0, "y", solutions17, 1, false);
+  assert_equation_approximate_solve_to("√(y)=0", -900.0, 1000.0, "y", solutions17, 1, false);
 
   // Long variable names
   const char * variablesabcde[] = {"abcde", ""};
@@ -163,13 +171,13 @@ QUIZ_CASE(equation_solve) {
 QUIZ_CASE(equation_solve_complex_format) {
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Real);
   const char * variablesx[] = {"x", ""};
-  // x+I = 0 --> x = -I
-  const char * equations0[] = {"x+I=0", 0};
-  const char * solutions0[] = {"-I"};
+  // x+I = 0 --> x = -𝐢
+  const char * equations0[] = {"x+𝐢=0", 0};
+  const char * solutions0[] = {"-𝐢"};
   assert_equation_system_exact_solve_to(equations0,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions0, 1);
 
-  // x+R(-1) = 0 --> Not defined in R
-  const char * equations1[] = {"x+R(-1)=0", 0};
+  // x+√(-1) = 0 --> Not defined in R
+  const char * equations1[] = {"x+√(-1)=0", 0};
   assert_equation_system_exact_solve_to(equations1,  EquationStore::Error::EquationUnreal, EquationStore::Type::LinearSystem, (const char **)variablesx, nullptr, 0);
 
   // x^2+x+1=0 --> No solution in R
@@ -177,47 +185,47 @@ QUIZ_CASE(equation_solve_complex_format) {
   const char * delta2[] = {"-3"};
   assert_equation_system_exact_solve_to(equations2, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, delta2, 1);
 
-  // x^2-R(-1)=0 --> Not defined in R
-  const char * equations3[] = {"x^2-R(-1)=0", 0};
+  // x^2-√(-1)=0 --> Not defined in R
+  const char * equations3[] = {"x^2-√(-1)=0", 0};
   assert_equation_system_exact_solve_to(equations3, EquationStore::Error::EquationUnreal, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, nullptr, 0);
 
-  // x+R(-1)*R(-1) = 0 --> Not defined in R
-  const char * equations4[] = {"x+R(-1)*R(-1)=0", 0};
+  // x+√(-1)×√(-1) = 0 --> Not defined in R
+  const char * equations4[] = {"x+√(-1)×√(-1)=0", 0};
   assert_equation_system_exact_solve_to(equations4,  EquationStore::Error::EquationUnreal, EquationStore::Type::LinearSystem, (const char **)variablesx, nullptr, 0);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Cartesian);
-  // x+I = 0 --> x = -I
+  // x+𝐢 = 0 --> x = -𝐢
   assert_equation_system_exact_solve_to(equations0,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions0, 1);
 
-  // x+R(-1) = 0 --> x = -I
+  // x+√(-1) = 0 --> x = -𝐢
   assert_equation_system_exact_solve_to(equations1,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions0, 1);
 
   // x^2+x+1=0
-  const char * solutions2[] = {"-(1)/(2)-(R(3))/(2)*I","-(1)/(2)+(R(3))/(2)*I", "-3"};
+  const char * solutions2[] = {"-(1)/(2)-(√(3))/(2)·𝐢","-(1)/(2)+(√(3))/(2)·𝐢", "-3"};
   assert_equation_system_exact_solve_to(equations2, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions2, 3);
 
-  // x^2-R(-1)=0
-  const char * solutions3[] = {"-(R(2))/(2)-(R(2))/(2)*I", "(R(2))/(2)+(R(2))/(2)*I","4*I"};
+  // x^2-√(-1)=0
+  const char * solutions3[] = {"-(√(2))/(2)-(√(2))/(2)·𝐢", "(√(2))/(2)+(√(2))/(2)·𝐢","4·𝐢"};
   assert_equation_system_exact_solve_to(equations3, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions3, 3);
 
-  // x+R(-1)*R(-1) = 0
+  // x+√(-1)×√(-1) = 0
   const char * solutions4[] = {"1"};
   assert_equation_system_exact_solve_to(equations4,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions4, 1);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Polar);
-  // x+I = 0 --> x = e^(-pi/2*i)
-  const char * solutions0Polar[] = {"X$-(P)/(2)*I#"};
+  // x+𝐢 = 0 --> x = e^(-π/2×i)
+  const char * solutions0Polar[] = {"ℯ\x12-(π)/(2)·𝐢\x13"};
   assert_equation_system_exact_solve_to(equations0,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions0Polar, 1);
 
-  // x+R(-1) = 0 --> x = e^(-pi/2*i)
+  // x+√(-1) = 0 --> x = e^(-π/2×𝐢)
   assert_equation_system_exact_solve_to(equations1,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesx, solutions0Polar, 1);
 
   // x^2+x+1=0
-  const char * solutions2Polar[] = {"X$-(2*P)/(3)*I#","X$(2*P)/(3)*I#", "3*X$P*I#"};
+  const char * solutions2Polar[] = {"ℯ\x12-(2·π)/(3)·𝐢\x13","ℯ\x12(2·π)/(3)·𝐢\x13", "3·ℯ\x12π·𝐢\x13"};
   assert_equation_system_exact_solve_to(equations2, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions2Polar, 3);
 
-  // x^2-R(-1)=0
-  const char * solutions3Polar[] = {"X$-(3*P)/(4)*I#", "X$(P)/(4)*I#", "4*X$(P)/(2)*I#"};
+  // x^2-√(-1)=0
+  const char * solutions3Polar[] = {"ℯ\x12-(3·π)/(4)·𝐢\x13", "ℯ\x12(π)/(4)·𝐢\x13", "4·ℯ\x12(π)/(2)·𝐢\x13"};
   assert_equation_system_exact_solve_to(equations3, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions3Polar, 3);
 
 }
diff --git a/kandinsky/test/utf8decoder.cpp b/kandinsky/test/utf8decoder.cpp
deleted file mode 100644
index 3c649f3b7..000000000
--- a/kandinsky/test/utf8decoder.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <quiz.h>
-#include <kandinsky/unicode/utf8_decoder.h>
-
-void assert_decodes_to(const char * string, CodePoint c) {
-  UTF8Decoder d(string);
-  quiz_assert(d.nextCodePoint() == c);
-  quiz_assert(d.nextCodePoint() == 0);
-}
-
-QUIZ_CASE(kandinsky_utf8_decoder) {
-  assert_decodes_to("\x20", 0x20);
-  assert_decodes_to("\xC2\xA2", 0xA2);
-  assert_decodes_to("\xED\x9F\xBF", 0xD7FF);
-  assert_decodes_to("\xCC\x81", 0x301);
-}
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index fcad08c9a..c24095089 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -177,7 +177,7 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
       return currentChar;
     }
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
-    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, KDCodePointScriptSmallE);
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, KDCodePointLatinLetterSmallCapitalE);
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
     currentChar += Integer(exponent).serialize(buffer+currentChar, bufferSize-currentChar);
     return currentChar;
diff --git a/poincare/src/print_float.cpp b/poincare/src/print_float.cpp
index af65a5d59..76f31560c 100644
--- a/poincare/src/print_float.cpp
+++ b/poincare/src/print_float.cpp
@@ -179,7 +179,7 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
     numberOfCharExponent++;
   }
 
-  /* Part III: print mantissa*10^exponent*/
+  /* Part III: print mantissa*10^exponent */
   int numberOfCharsForMantissaWithSign = f >= 0 ? numberOfCharsForMantissaWithoutSign : numberOfCharsForMantissaWithoutSign + 1;
   // Print mantissa
   assert(!dividend.isOverflow());
@@ -199,11 +199,11 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
   // Print exponent
   assert(numberOfCharsForMantissaWithSign < bufferSize);
   int currentNumberOfChar = numberOfCharsForMantissaWithSign;
-  currentNumberOfChar+= SerializationHelper::CodePoint(buffer + currentNumberOfChar, bufferSize - currentNumberOfChar, KDCodePointScriptSmallE);
+  currentNumberOfChar+= SerializationHelper::CodePoint(buffer + currentNumberOfChar, bufferSize - currentNumberOfChar, KDCodePointLatinLetterSmallCapitalE);
   assert(numberOfCharExponent+currentNumberOfChar < bufferSize);
-  PrintFloat::printBase10IntegerWithDecimalMarker(buffer+numberOfCharsForMantissaWithSign+1, numberOfCharExponent, Integer(exponentInBase10), -1);
-  buffer[numberOfCharsForMantissaWithSign+1+numberOfCharExponent] = 0;
-  return (numberOfCharsForMantissaWithSign+1+numberOfCharExponent);
+  PrintFloat::printBase10IntegerWithDecimalMarker(buffer + currentNumberOfChar, numberOfCharExponent, Integer(exponentInBase10), -1);
+  buffer[currentNumberOfChar + numberOfCharExponent] = 0;
+  return (currentNumberOfChar + numberOfCharExponent);
 }
 
 template int PrintFloat::convertFloatToText<float>(float, char*, int, int, Preferences::Preferences::PrintFloatMode, bool);
diff --git a/poincare/test/addition.cpp b/poincare/test/addition.cpp
index f7588f627..e0114946f 100644
--- a/poincare/test/addition.cpp
+++ b/poincare/test/addition.cpp
@@ -47,16 +47,16 @@ QUIZ_CASE(poincare_addition_parsing) {
 
 QUIZ_CASE(poincare_addition_evaluate) {
   assert_parsed_expression_evaluates_to<float>("1+2", "3");
-  assert_parsed_expression_evaluates_to<float>("I", "I");
-  assert_parsed_expression_evaluates_to<float>("I+I", "2*I");
-  assert_parsed_expression_evaluates_to<double>("2+I+4+I", "6+2*I");
+  assert_parsed_expression_evaluates_to<float>("𝐢", "𝐢");
+  assert_parsed_expression_evaluates_to<float>("𝐢+𝐢", "2×𝐢");
+  assert_parsed_expression_evaluates_to<double>("2+𝐢+4+𝐢", "6+2×𝐢");
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]+3", "[[4,5][6,7][8,9]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]+3+I", "[[4+I,5+2*I][6+I,7+I][8+I,9+I]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]+3+𝐢", "[[4+𝐢,5+2×𝐢][6+𝐢,7+𝐢][8+𝐢,9+𝐢]]");
   assert_parsed_expression_evaluates_to<float>("3+[[1,2][3,4][5,6]]", "[[4,5][6,7][8,9]]");
-  assert_parsed_expression_evaluates_to<double>("3+I+[[1,2+I][3,4][5,6]]", "[[4+I,5+2*I][6+I,7+I][8+I,9+I]]");
+  assert_parsed_expression_evaluates_to<double>("3+𝐢+[[1,2+𝐢][3,4][5,6]]", "[[4+𝐢,5+2×𝐢][6+𝐢,7+𝐢][8+𝐢,9+𝐢]]");
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]+[[1,2][3,4][5,6]]", "[[2,4][6,8][10,12]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]+[[1,2+I][3,4][5,6]]", "[[2,4+2*I][6,8][10,12]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]+[[1,2+𝐢][3,4][5,6]]", "[[2,4+2×𝐢][6,8][10,12]]");
 #endif
 }
 
@@ -75,18 +75,18 @@ QUIZ_CASE(poincare_addition_simplify) {
   assert_parsed_expression_simplify_to("-2-6", "-8");
   assert_parsed_expression_simplify_to("-A", "-A");
   assert_parsed_expression_simplify_to("A-A", "0");
-  assert_parsed_expression_simplify_to("-5P+3P", "-2*P");
+  assert_parsed_expression_simplify_to("-5π+3π", "-2×π");
   assert_parsed_expression_simplify_to("1-3+A-5+2A-4A", "-A-7");
   assert_parsed_expression_simplify_to("A+B-A-B", "0");
-  assert_parsed_expression_simplify_to("A+B+(-1)*A+(-1)*B", "0");
-  assert_parsed_expression_simplify_to("2+13cos(2)-23cos(2)", "-10*cos(2)+2");
-  assert_parsed_expression_simplify_to("1+1+ln(2)+(5+3*2)/9-4/7+1/98", "(882*ln(2)+2347)/882");
+  assert_parsed_expression_simplify_to("A+B+(-1)×A+(-1)×B", "0");
+  assert_parsed_expression_simplify_to("2+13cos(2)-23cos(2)", "-10×cos(2)+2");
+  assert_parsed_expression_simplify_to("1+1+ln(2)+(5+3×2)/9-4/7+1/98", "(882×ln(2)+2347)/882");
   assert_parsed_expression_simplify_to("1+2+0+cos(2)", "cos(2)+3");
   assert_parsed_expression_simplify_to("A-A+2cos(2)+B-B-cos(2)", "cos(2)");
-  assert_parsed_expression_simplify_to("x+3+P+2*x", "3*x+P+3");
-  assert_parsed_expression_simplify_to("1/(x+1)+1/(P+2)", "(x+P+3)/(P*x+2*x+P+2)");
-  assert_parsed_expression_simplify_to("1/x^2+1/(x^2*P)", "(P+1)/(P*x^2)");
-  assert_parsed_expression_simplify_to("1/x^2+1/(x^3*P)", "(P*x+1)/(P*x^3)");
-  assert_parsed_expression_simplify_to("4x/x^2+3P/(x^3*P)", "(4*x^2+3)/x^3");
-  assert_parsed_expression_simplify_to("3^(1/2)+2^(-2*3^(1/2)*X^P)/2", "(2*2^(2*R(3)*X^P)*R(3)+1)/(2*2^(2*R(3)*X^P))");
+  assert_parsed_expression_simplify_to("x+3+π+2×x", "3×x+π+3");
+  assert_parsed_expression_simplify_to("1/(x+1)+1/(π+2)", "(x+π+3)/(π×x+2×x+π+2)");
+  assert_parsed_expression_simplify_to("1/x^2+1/(x^2×π)", "(π+1)/(π×x^2)");
+  assert_parsed_expression_simplify_to("1/x^2+1/(x^3×π)", "(π×x+1)/(π×x^3)");
+  assert_parsed_expression_simplify_to("4x/x^2+3π/(x^3×π)", "(4×x^2+3)/x^3");
+  assert_parsed_expression_simplify_to("3^(1/2)+2^(-2×3^(1/2)×ℯ^π)/2", "(2×2^(2×√(3)×ℯ^π)×√(3)+1)/(2×2^(2×√(3)×ℯ^π))");
 }
diff --git a/poincare/test/complex.cpp b/poincare/test/complex.cpp
index f72f26bb5..76749ba06 100644
--- a/poincare/test/complex.cpp
+++ b/poincare/test/complex.cpp
@@ -8,9 +8,9 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_complex_evaluate) {
   // Real
-  assert_parsed_expression_evaluates_to<float>("I", "unreal", System, Radian, Real);
-  assert_parsed_expression_evaluates_to<double>("R(-1)", "unreal", System, Radian, Real);
-  assert_parsed_expression_evaluates_to<double>("R(-1)*R(-1)", "unreal", System, Radian, Real);
+  assert_parsed_expression_evaluates_to<float>("𝐢", "unreal", System, Radian, Real);
+  assert_parsed_expression_evaluates_to<double>("√(-1)", "unreal", System, Radian, Real);
+  assert_parsed_expression_evaluates_to<double>("√(-1)×√(-1)", "unreal", System, Radian, Real);
   assert_parsed_expression_evaluates_to<double>("ln(-2)", "unreal", System, Radian, Real);
   assert_parsed_expression_evaluates_to<double>("(-8)^(1/3)", "-2", System, Radian, Real);
   assert_parsed_expression_evaluates_to<double>("8^(1/3)", "2", System, Radian, Real);
@@ -18,89 +18,89 @@ QUIZ_CASE(poincare_complex_evaluate) {
   assert_parsed_expression_evaluates_without_simplifying_to<double>("root(-8,3)", "-2", Radian, Real);
 
   // Cartesian
-  assert_parsed_expression_evaluates_to<float>("I", "I", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_to<double>("R(-1)", "I", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_to<double>("R(-1)*R(-1)", "-1", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_to<double>("ln(-2)", "6.9314718055995E-1+3.1415926535898*I", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_to<double>("(-8)^(1/3)", "1+1.7320508075689*I", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_to<float>("(-8)^(2/3)", "-2+3.464102*I", System, Radian, Cartesian);
-  assert_parsed_expression_evaluates_without_simplifying_to<double>("root(-8,3)", "1+1.7320508075689*I", Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<float>("𝐢", "𝐢", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<double>("√(-1)", "𝐢", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<double>("√(-1)×√(-1)", "-1", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<double>("ln(-2)", "6.9314718055995ᴇ-1+3.1415926535898×𝐢", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<double>("(-8)^(1/3)", "1+1.7320508075689×𝐢", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_to<float>("(-8)^(2/3)", "-2+3.464102×𝐢", System, Radian, Cartesian);
+  assert_parsed_expression_evaluates_without_simplifying_to<double>("root(-8,3)", "1+1.7320508075689×𝐢", Radian, Cartesian);
 
   // Polar
-  assert_parsed_expression_evaluates_to<float>("I", "X^(1.570796*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("R(-1)", "X^(1.5707963267949*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("R(-1)*R(-1)", "X^(3.1415926535898*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("(-8)^(1/3)", "2*X^(1.0471975511966*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("(-8)^(2/3)", "4*X^(2.094395*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_without_simplifying_to<double>("root(-8,3)", "2*X^(1.0471975511966*I)", Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("𝐢", "ℯ^(1.570796×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("√(-1)", "ℯ^(1.5707963267949×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("√(-1)×√(-1)", "ℯ^(3.1415926535898×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("(-8)^(1/3)", "2×ℯ^(1.0471975511966×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("(-8)^(2/3)", "4×ℯ^(2.094395×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_without_simplifying_to<double>("root(-8,3)", "2×ℯ^(1.0471975511966×𝐢)", Radian, Polar);
 }
 
 QUIZ_CASE(poincare_complex_simplify) {
   // Real
-  assert_parsed_expression_simplify_to("I", "unreal", User, Radian, Real);
-  assert_parsed_expression_simplify_to("R(-1)", "unreal", User, Radian, Real);
-  assert_parsed_expression_simplify_to("R(-1)*R(-1)", "unreal", User, Radian, Real);
+  assert_parsed_expression_simplify_to("𝐢", "unreal", User, Radian, Real);
+  assert_parsed_expression_simplify_to("√(-1)", "unreal", User, Radian, Real);
+  assert_parsed_expression_simplify_to("√(-1)×√(-1)", "unreal", User, Radian, Real);
   assert_parsed_expression_simplify_to("ln(-2)", "ln(-2)", User, Radian, Real);
   assert_parsed_expression_simplify_to("(-8)^(2/3)", "4", User, Radian, Real);
-  assert_parsed_expression_simplify_to("(-8)^(2/5)", "2*root(2,5)", User, Radian, Real);
+  assert_parsed_expression_simplify_to("(-8)^(2/5)", "2×root(2,5)", User, Radian, Real);
   assert_parsed_expression_simplify_to("(-8)^(1/5)", "-root(8,5)", User, Radian, Real);
   assert_parsed_expression_simplify_to("(-8)^(1/4)", "unreal", User, Radian, Real);
   assert_parsed_expression_simplify_to("(-8)^(1/3)", "-2", User, Radian, Real);
 
   // Cartesian
-  assert_parsed_expression_simplify_to("-2.3E3", "-2300", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("-2.3ᴇ3", "-2300", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("3", "3", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("inf", "inf", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("1+2+I", "3+I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("-(5+2*I)", "-5-2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(5+2*I)", "5+2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("I+I", "2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("-2+2*I", "-2+2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(3+I)-(2+4*I)", "1-3*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(2+3*I)*(4-2*I)", "14+8*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(3+I)/2", "3/2+1/2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(3+I)/(2+I)", "7/5-1/5*I", User, Radian, Cartesian);
-  // The simplification of (3+I)^(2+I) in a Cartesian complex form generates to many nodes
-  //assert_parsed_expression_simplify_to("(3+I)^(2+I)", "10*cos((-4*atan(3)+ln(2)+ln(5)+2*P)/2)*X^((2*atan(3)-P)/2)+10*sin((-4*atan(3)+ln(2)+ln(5)+2*P)/2)*X^((2*atan(3)-P)/2)*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(3+I)^(2+I)", "(I+3)^(I+2)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("R(1+6I)", "R(2*R(37)+2)/2+R(2*R(37)-2)/2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("(1+I)^2", "2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("2*I", "2*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("I!", "I!", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("1+2+𝐢", "3+𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("-(5+2×𝐢)", "-5-2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(5+2×𝐢)", "5+2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("𝐢+𝐢", "2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("-2+2×𝐢", "-2+2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(3+𝐢)-(2+4×𝐢)", "1-3×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(2+3×𝐢)×(4-2×𝐢)", "14+8×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(3+𝐢)/2", "3/2+1/2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(3+𝐢)/(2+𝐢)", "7/5-1/5×𝐢", User, Radian, Cartesian);
+  // The simplification of (3+𝐢)^(2+𝐢) in a Cartesian complex form generates to many nodes
+  //assert_parsed_expression_simplify_to("(3+𝐢)^(2+𝐢)", "10×cos((-4×atan(3)+ln(2)+ln(5)+2×π)/2)×ℯ^((2×atan(3)-π)/2)+10×sin((-4×atan(3)+ln(2)+ln(5)+2×π)/2)×ℯ^((2×atan(3)-π)/2)×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(3+𝐢)^(2+𝐢)", "(𝐢+3)^(𝐢+2)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("√(1+6𝐢)", "√(2×√(37)+2)/2+√(2×√(37)-2)/2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("(1+𝐢)^2", "2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("2×𝐢", "2×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("𝐢!", "𝐢!", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("3!", "6", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("x!", "x!", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("X", "X", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("P", "P", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("I", "I", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("ℯ", "ℯ", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("π", "π", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("𝐢", "𝐢", User, Radian, Cartesian);
 
   assert_parsed_expression_simplify_to("abs(-3)", "3", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("abs(-3+I)", "R(10)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("abs(-3+𝐢)", "√(10)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("atan(2)", "atan(2)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("atan(2+I)", "atan(2+I)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("atan(2+𝐢)", "atan(2+𝐢)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("binomial(10, 4)", "210", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("ceil(-1.3)", "-1", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("arg(-2)", "P", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("arg(-2)", "π", User, Radian, Cartesian);
   // TODO: confidence is not simplified yet
   //assert_parsed_expression_simplify_to("confidence(-2,-3)", "confidence(-2)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("conj(-2)", "-2", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("conj(-2+2*I+I)", "-2-3*I", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("conj(-2+2×𝐢+𝐢)", "-2-3×𝐢", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("cos(12)", "cos(12)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("cos(12+I)", "cos(12+I)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("diff(3*x, x, 3)", "diff(3*x,x,3)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("cos(12+𝐢)", "cos(12+𝐢)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("diff(3×x, x, 3)", "diff(3×x,x,3)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("quo(34,x)", "quo(34,x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("rem(5,3)", "2", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("floor(x)", "floor(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("frac(x)", "frac(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("gcd(x,y)", "gcd(x,y)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("im(1+I)", "1", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("im(1+𝐢)", "1", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("int(x^2, x, 1, 2)", "int(x^2,x,1,2)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("lcm(x,y)", "lcm(x,y)", User, Radian, Cartesian);
   // TODO: dim is not simplified yet
   //assert_parsed_expression_simplify_to("dim(x)", "dim(x)", User, Radian, Cartesian);
 
-  assert_parsed_expression_simplify_to("root(2,I)", "cos(ln(2))-sin(ln(2))*I", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("root(2,I+1)", "R(2)*cos((90*ln(2))/P)-R(2)*sin((90*ln(2))/P)*I", User, Degree, Cartesian);
-  assert_parsed_expression_simplify_to("root(2,I+1)", "R(2)*cos(ln(2)/2)-R(2)*sin(ln(2)/2)*I", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("root(2,𝐢)", "cos(ln(2))-sin(ln(2))×𝐢", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("root(2,𝐢+1)", "√(2)×cos((90×ln(2))/π)-√(2)×sin((90×ln(2))/π)×𝐢", User, Degree, Cartesian);
+  assert_parsed_expression_simplify_to("root(2,𝐢+1)", "√(2)×cos(ln(2)/2)-√(2)×sin(ln(2)/2)×𝐢", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("permute(10, 4)", "5040", User, Radian, Cartesian);
   // TODO: prediction is not simplified yet
   //assert_parsed_expression_simplify_to("prediction(-2,-3)", "prediction(-2)", User, Radian, Cartesian);
@@ -110,70 +110,70 @@ QUIZ_CASE(poincare_complex_simplify) {
   assert_parsed_expression_simplify_to("round(x,y)", "round(x,y)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("sign(x)", "sign(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("sin(23)", "sin(23)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("sin(23+I)", "sin(23+I)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("R(1-I)", "R(2*R(2)+2)/2-R(2*R(2)-2)/2*I", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("sin(23+𝐢)", "sin(23+𝐢)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("√(1-𝐢)", "√(2×√(2)+2)/2-√(2×√(2)-2)/2×𝐢", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("tan(23)", "tan(23)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("tan(23+I)", "tan(23+I)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("tan(23+𝐢)", "tan(23+𝐢)", User, Radian, Cartesian);
 
   // User defined variable
   assert_parsed_expression_simplify_to("a", "a", User, Radian, Cartesian);
   // a = 2+i
-  assert_simplify("2+I>a");
-  assert_parsed_expression_simplify_to("a", "2+I", User, Radian, Cartesian);
+  assert_simplify("2+𝐢→a");
+  assert_parsed_expression_simplify_to("a", "2+𝐢", User, Radian, Cartesian);
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
   // User defined function
   assert_parsed_expression_simplify_to("f(3)", "f(3)", User, Radian, Cartesian);
-  // f: x -> x+1
-  assert_simplify("x+1+I>f(x)");
-  assert_parsed_expression_simplify_to("f(3)", "4+I", User, Radian, Cartesian);
+  // f : x → x+1
+  assert_simplify("x+1+𝐢→f(x)");
+  assert_parsed_expression_simplify_to("f(3)", "4+𝐢", User, Radian, Cartesian);
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 
   // Polar
-  assert_parsed_expression_simplify_to("-2.3E3", "2300*X^(P*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("-2.3ᴇ3", "2300×ℯ^(π×𝐢)", User, Radian, Polar);
   assert_parsed_expression_simplify_to("3", "3", User, Radian, Polar);
   assert_parsed_expression_simplify_to("inf", "inf", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("1+2+I", "R(10)*X^((-2*atan(3)+P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("1+2+I", "R(10)*X^((-P*atan(3)+90*P)/180*I)", User, Degree, Polar);
-  assert_parsed_expression_simplify_to("-(5+2*I)", "R(29)*X^((-2*atan(5/2)-P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(5+2*I)", "R(29)*X^((-2*atan(5/2)+P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("I+I", "2*X^(P/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("I+I", "2*X^(P/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("-2+2*I", "2*R(2)*X^((3*P)/4*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(3+I)-(2+4*I)", "R(10)*X^((2*atan(1/3)-P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(2+3*I)*(4-2*I)", "2*R(65)*X^((-2*atan(7/4)+P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(3+I)/2", "R(10)/2*X^((-2*atan(3)+P)/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(3+I)/(2+I)", "R(2)*X^((2*atan(7)-P)/2*I)", User, Radian, Polar);
-  // TODO: simplify atan(tan(x)) = x±k*pi?
-  //assert_parsed_expression_simplify_to("(3+I)^(2+I)", "10*X^((2*atan(3)-P)/2)*X^((-4*atan(3)+ln(2)+ln(5)+2*P)/2*I)", User, Radian, Polar);
-  // The simplification of (3+I)^(2+I) in a Polar complex form generates to many nodes
-  //assert_parsed_expression_simplify_to("(3+I)^(2+I)", "10*X^((2*atan(3)-P)/2)*X^((atan(tan((-4*atan(3)+ln(2)+ln(5)+2*P)/2))+P)*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(3+I)^(2+I)", "(I+3)^(I+2)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("(1+I)^2", "2*X^(P/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("2*I", "2*X^(P/2*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("1+2+𝐢", "√(10)×ℯ^((-2×atan(3)+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("1+2+𝐢", "√(10)×ℯ^((-π×atan(3)+90×π)/180×𝐢)", User, Degree, Polar);
+  assert_parsed_expression_simplify_to("-(5+2×𝐢)", "√(29)×ℯ^((-2×atan(5/2)-π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(5+2×𝐢)", "√(29)×ℯ^((-2×atan(5/2)+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("𝐢+𝐢", "2×ℯ^(π/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("𝐢+𝐢", "2×ℯ^(π/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("-2+2×𝐢", "2×√(2)×ℯ^((3×π)/4×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(3+𝐢)-(2+4×𝐢)", "√(10)×ℯ^((2×atan(1/3)-π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(2+3×𝐢)×(4-2×𝐢)", "2×√(65)×ℯ^((-2×atan(7/4)+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(3+𝐢)/2", "√(10)/2×ℯ^((-2×atan(3)+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(3+𝐢)/(2+𝐢)", "√(2)×ℯ^((2×atan(7)-π)/2×𝐢)", User, Radian, Polar);
+  // TODO: simplify atan(tan(x)) = x±k×pi?
+  //assert_parsed_expression_simplify_to("(3+𝐢)^(2+𝐢)", "10×ℯ^((2×atan(3)-π)/2)×ℯ^((-4×atan(3)+ln(2)+ln(5)+2×π)/2×𝐢)", User, Radian, Polar);
+  // The simplification of (3+𝐢)^(2+𝐢) in a Polar complex form generates to many nodes
+  //assert_parsed_expression_simplify_to("(3+𝐢)^(2+𝐢)", "10×ℯ^((2×atan(3)-π)/2)×ℯ^((atan(tan((-4×atan(3)+ln(2)+ln(5)+2×π)/2))+π)×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(3+𝐢)^(2+𝐢)", "(𝐢+3)^(𝐢+2)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("(1+𝐢)^2", "2×ℯ^(π/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("2×𝐢", "2×ℯ^(π/2×𝐢)", User, Radian, Polar);
   assert_parsed_expression_simplify_to("3!", "6", User, Radian, Polar);
   assert_parsed_expression_simplify_to("x!", "x!", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("X", "X", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("P", "P", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("I", "X^(P/2*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("ℯ", "ℯ", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("π", "π", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("𝐢", "ℯ^(π/2×𝐢)", User, Radian, Polar);
   assert_parsed_expression_simplify_to("abs(-3)", "3", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("abs(-3+I)", "R(10)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("conj(2*X^(I*P/2))", "2*X^(-P/2*I)", User, Radian, Polar);
-  assert_parsed_expression_simplify_to("-2*X^(I*P/2)", "2*X^(-P/2*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("abs(-3+𝐢)", "√(10)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("conj(2×ℯ^(𝐢×π/2))", "2×ℯ^(-π/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("-2×ℯ^(𝐢×π/2)", "2×ℯ^(-π/2×𝐢)", User, Radian, Polar);
 
   // User defined variable
-  assert_parsed_expression_simplify_to("a", "R(a^2)*X^((-P*sign(a)+P)/2*I)", User, Radian, Polar);
-  // a = 2+i
-  assert_simplify("2+I>a");
-  assert_parsed_expression_simplify_to("a", "R(5)*X^((-2*atan(2)+P)/2*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("a", "√(a^2)×ℯ^((-π×sign(a)+π)/2×𝐢)", User, Radian, Polar);
+  // a = 2 + 𝐢
+  assert_simplify("2+𝐢→a");
+  assert_parsed_expression_simplify_to("a", "√(5)×ℯ^((-2×atan(2)+π)/2×𝐢)", User, Radian, Polar);
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
   // User defined function
-  assert_parsed_expression_simplify_to("f(3)", "R(f(3)^2)*X^((-P*sign(f(3))+P)/2*I)", User, Radian, Polar);
-  // f: x -> x+1
-  assert_simplify("x+1+I>f(x)");
-  assert_parsed_expression_simplify_to("f(3)", "R(17)*X^((-2*atan(4)+P)/2*I)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("f(3)", "√(f(3)^2)×ℯ^((-π×sign(f(3))+π)/2×𝐢)", User, Radian, Polar);
+  // f: x → x+1
+  assert_simplify("x+1+𝐢→f(x)");
+  assert_parsed_expression_simplify_to("f(3)", "√(17)×ℯ^((-2×atan(4)+π)/2×𝐢)", User, Radian, Polar);
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 }
diff --git a/poincare/test/complex_to_expression.cpp b/poincare/test/complex_to_expression.cpp
index 669669586..3f44d8a0c 100644
--- a/poincare/test/complex_to_expression.cpp
+++ b/poincare/test/complex_to_expression.cpp
@@ -17,71 +17,71 @@ QUIZ_CASE(poincare_complex_to_expression) {
   assert_parsed_expression_evaluates_to<float>("0.1", "0.1");
   assert_parsed_expression_evaluates_to<float>("0.1234567", "0.1234567");
   assert_parsed_expression_evaluates_to<float>("0.12345678", "0.1234568");
-  assert_parsed_expression_evaluates_to<float>("1+2*I", "1+2*I");
-  assert_parsed_expression_evaluates_to<float>("1+I-I", "1");
-  assert_parsed_expression_evaluates_to<float>("1+I-1", "I");
-  assert_parsed_expression_evaluates_to<float>("1+I", "1+I");
-  assert_parsed_expression_evaluates_to<float>("3+I", "3+I");
-  assert_parsed_expression_evaluates_to<float>("3-I", "3-I");
-  assert_parsed_expression_evaluates_to<float>("3-I-3", "-I");
+  assert_parsed_expression_evaluates_to<float>("1+2×𝐢", "1+2×𝐢");
+  assert_parsed_expression_evaluates_to<float>("1+𝐢-𝐢", "1");
+  assert_parsed_expression_evaluates_to<float>("1+𝐢-1", "𝐢");
+  assert_parsed_expression_evaluates_to<float>("1+𝐢", "1+𝐢");
+  assert_parsed_expression_evaluates_to<float>("3+𝐢", "3+𝐢");
+  assert_parsed_expression_evaluates_to<float>("3-𝐢", "3-𝐢");
+  assert_parsed_expression_evaluates_to<float>("3-𝐢-3", "-𝐢");
 
   assert_parsed_expression_evaluates_to<float>("10", "10", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("-10", "10*X^(3.141593*I)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("-10", "10×ℯ^(3.141593×𝐢)", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<float>("100", "100", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<float>("0.1", "0.1", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<float>("0.1234567", "0.1234567", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<float>("0.12345678", "0.1234568", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("1+2*I", "2.236068*X^(1.107149*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("1+I-I", "1", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("1+I-1", "X^(1.570796*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("1+I", "1.414214*X^(0.7853982*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("3+I", "3.162278*X^(0.3217506*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("3-I", "3.162278*X^(-0.3217506*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<float>("3-I-3", "X^(-1.570796*I)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("1+2×𝐢", "2.236068×ℯ^(1.107149×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("1+𝐢-𝐢", "1", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("1+𝐢-1", "ℯ^(1.570796×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("1+𝐢", "1.414214×ℯ^(0.7853982×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("3+𝐢", "3.162278×ℯ^(0.3217506×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("3-𝐢", "3.162278×ℯ^(-0.3217506×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<float>("3-𝐢-3", "ℯ^(-1.570796×𝐢)", System, Radian, Polar);
 
   assert_parsed_expression_evaluates_to<double>("10", "10");
   assert_parsed_expression_evaluates_to<double>("-10", "-10");
   assert_parsed_expression_evaluates_to<double>("100", "100");
   assert_parsed_expression_evaluates_to<double>("0.1", "0.1");
-  assert_parsed_expression_evaluates_to<double>("0.12345678901234", "1.2345678901234E-1");
-  assert_parsed_expression_evaluates_to<double>("0.123456789012345", "1.2345678901235E-1");
-  assert_parsed_expression_evaluates_to<double>("1+2*I", "1+2*I");
-  assert_parsed_expression_evaluates_to<double>("1+I-I", "1");
-  assert_parsed_expression_evaluates_to<double>("1+I-1", "I");
-  assert_parsed_expression_evaluates_to<double>("1+I", "1+I");
-  assert_parsed_expression_evaluates_to<double>("3+I", "3+I");
-  assert_parsed_expression_evaluates_to<double>("3-I", "3-I");
-  assert_parsed_expression_evaluates_to<double>("3-I-3", "-I");
+  assert_parsed_expression_evaluates_to<double>("0.12345678901234", "1.2345678901234ᴇ-1");
+  assert_parsed_expression_evaluates_to<double>("0.123456789012345", "1.2345678901235ᴇ-1");
+  assert_parsed_expression_evaluates_to<double>("1+2×𝐢", "1+2×𝐢");
+  assert_parsed_expression_evaluates_to<double>("1+𝐢-𝐢", "1");
+  assert_parsed_expression_evaluates_to<double>("1+𝐢-1", "𝐢");
+  assert_parsed_expression_evaluates_to<double>("1+𝐢", "1+𝐢");
+  assert_parsed_expression_evaluates_to<double>("3+𝐢", "3+𝐢");
+  assert_parsed_expression_evaluates_to<double>("3-𝐢", "3-𝐢");
+  assert_parsed_expression_evaluates_to<double>("3-𝐢-3", "-𝐢");
 
   assert_parsed_expression_evaluates_to<double>("10", "10", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("-10", "10*X^(3.1415926535898*I)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("-10", "10×ℯ^(3.1415926535898×𝐢)", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<double>("100", "100", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<double>("0.1", "0.1", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<double>("0.1234567", "0.1234567", System, Radian, Polar);
   assert_parsed_expression_evaluates_to<double>("0.12345678", "0.12345678", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("1+2*I", "2.2360679775*X^(1.10714871779*I)", System, Radian, Polar, 12);
-  assert_parsed_expression_evaluates_to<double>("1+I-I", "1", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("1+I-1", "X^(1.57079632679*I)", System, Radian, Polar, 12);
-  assert_parsed_expression_evaluates_to<double>("1+I", "1.41421356237*X^(0.785398163397*I)", System, Radian, Polar, 12);
-  assert_parsed_expression_evaluates_to<double>("3+I", "3.16227766017*X^(0.321750554397*I)", System, Radian, Polar,12);
-  assert_parsed_expression_evaluates_to<double>("3-I", "3.16227766017*X^(-0.321750554397*I)", System, Radian, Polar,12);
-  assert_parsed_expression_evaluates_to<double>("3-I-3", "X^(-1.57079632679*I)", System, Radian, Polar,12);
+  assert_parsed_expression_evaluates_to<double>("1+2×𝐢", "2.2360679775×ℯ^(1.10714871779×𝐢)", System, Radian, Polar, 12);
+  assert_parsed_expression_evaluates_to<double>("1+𝐢-𝐢", "1", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("1+𝐢-1", "ℯ^(1.57079632679×𝐢)", System, Radian, Polar, 12);
+  assert_parsed_expression_evaluates_to<double>("1+𝐢", "1.41421356237×ℯ^(0.785398163397×𝐢)", System, Radian, Polar, 12);
+  assert_parsed_expression_evaluates_to<double>("3+𝐢", "3.16227766017×ℯ^(0.321750554397×𝐢)", System, Radian, Polar,12);
+  assert_parsed_expression_evaluates_to<double>("3-𝐢", "3.16227766017×ℯ^(-0.321750554397×𝐢)", System, Radian, Polar,12);
+  assert_parsed_expression_evaluates_to<double>("3-𝐢-3", "ℯ^(-1.57079632679×𝐢)", System, Radian, Polar,12);
 
-  assert_parsed_expression_evaluates_to<double>("2+3*I", "3.60555127546*X^(0.982793723247*I)", System, Radian, Polar, 12);
-  assert_parsed_expression_evaluates_to<double>("3.60555127546*X^(0.982793723247*I)", "2+3*I", System, Radian, Cartesian, 12);
-  assert_parsed_expression_evaluates_to<float>("12.04159457879229548012824103*X^(1.4876550949*I)", "1+12*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("-2E20+2E20*I", "-2E20+2E20*I");
-  assert_parsed_expression_evaluates_to<float>("-2E20+2E20*I", "2.828427E20*X^(2.356194*I)", System, Radian, Polar);
-  assert_parsed_expression_evaluates_to<double>("1E155-1E155*I", "1E155-1E155*I");
-  assert_parsed_expression_evaluates_to<double>("1E155-1E155*I", "1.41421356237E155*X^(-0.785398163397*I)", System, Radian, Polar,12);
+  assert_parsed_expression_evaluates_to<double>("2+3×𝐢", "3.60555127546×ℯ^(0.982793723247×𝐢)", System, Radian, Polar, 12);
+  assert_parsed_expression_evaluates_to<double>("3.60555127546×ℯ^(0.982793723247×𝐢)", "2+3×𝐢", System, Radian, Cartesian, 12);
+  assert_parsed_expression_evaluates_to<float>("12.04159457879229548012824103×ℯ^(1.4876550949×𝐢)", "1+12×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("-2ᴇ20+2ᴇ20×𝐢", "-2ᴇ20+2ᴇ20×𝐢");
+  assert_parsed_expression_evaluates_to<float>("-2ᴇ20+2ᴇ20×𝐢", "2.828427ᴇ20×ℯ^(2.356194×𝐢)", System, Radian, Polar);
+  assert_parsed_expression_evaluates_to<double>("1ᴇ155-1ᴇ155×𝐢", "1ᴇ155-1ᴇ155×𝐢");
+  assert_parsed_expression_evaluates_to<double>("1ᴇ155-1ᴇ155×𝐢", "1.41421356237ᴇ155×ℯ^(-0.785398163397×𝐢)", System, Radian, Polar,12);
 
-  assert_parsed_expression_evaluates_to<float>("-2E100+2E100*I", Undefined::Name());
-  assert_parsed_expression_evaluates_to<double>("-2E360+2E360*I", Undefined::Name());
-  assert_parsed_expression_evaluates_to<float>("-2E100+2E10*I", "-inf+2E10*I");
-  assert_parsed_expression_evaluates_to<double>("-2E360+2*I", "-inf+2*I");
-  assert_parsed_expression_evaluates_to<float>("undef+2E100*I", Undefined::Name());
-  assert_parsed_expression_evaluates_to<double>("-2E360+undef*I", Undefined::Name());
+  assert_parsed_expression_evaluates_to<float>("-2ᴇ100+2ᴇ100×𝐢", Undefined::Name());
+  assert_parsed_expression_evaluates_to<double>("-2ᴇ360+2ᴇ360×𝐢", Undefined::Name());
+  assert_parsed_expression_evaluates_to<float>("-2ᴇ100+2ᴇ10×𝐢", "-inf+2ᴇ10×𝐢");
+  assert_parsed_expression_evaluates_to<double>("-2ᴇ360+2×𝐢", "-inf+2×𝐢");
+  assert_parsed_expression_evaluates_to<float>("undef+2ᴇ100×𝐢", Undefined::Name());
+  assert_parsed_expression_evaluates_to<double>("-2ᴇ360+undef×𝐢", Undefined::Name());
 
-  assert_parsed_expression_evaluates_to<double>("2*X^(I)", "2*X^I", System, Radian, Polar, 5);
-  assert_parsed_expression_evaluates_to<double>("2*X^(-I)", "2*X^(-I)", System, Radian, Polar, 5);
+  assert_parsed_expression_evaluates_to<double>("2×ℯ^(𝐢)", "2×ℯ^𝐢", System, Radian, Polar, 5);
+  assert_parsed_expression_evaluates_to<double>("2×ℯ^(-𝐢)", "2×ℯ^(-𝐢)", System, Radian, Polar, 5);
 }
diff --git a/poincare/test/convert_expression_to_text.cpp b/poincare/test/convert_expression_to_text.cpp
index 37702f9b8..0d557cbb1 100644
--- a/poincare/test/convert_expression_to_text.cpp
+++ b/poincare/test/convert_expression_to_text.cpp
@@ -58,9 +58,9 @@ void assert_expression_prints_to(Expression e, const char * result, Preferences:
 }
 
 QUIZ_CASE(assert_float_prints_to) {
-  assert_float_prints_to(123.456f, "1.23456E2", ScientificMode, 7);
+  assert_float_prints_to(123.456f, "1.23456ᴇ2", ScientificMode, 7);
   assert_float_prints_to(123.456f, "123.456", DecimalMode, 7);
-  assert_float_prints_to(123.456, "1.23456E2", ScientificMode, 14);
+  assert_float_prints_to(123.456, "1.23456ᴇ2", ScientificMode, 14);
   assert_float_prints_to(123.456, "123.456", DecimalMode, 14);
 
   assert_float_prints_to(1.234567891011f, "1.234568", ScientificMode, 7);
@@ -73,29 +73,29 @@ QUIZ_CASE(assert_float_prints_to) {
   assert_float_prints_to(2.0, "2", ScientificMode, 14);
   assert_float_prints_to(2.0, "2", DecimalMode, 14);
 
-  assert_float_prints_to(123456789.0f, "1.234568E8", ScientificMode, 7);
-  assert_float_prints_to(123456789.0f, "1.234568E8", DecimalMode, 7);
-  assert_float_prints_to(123456789.0, "1.23456789E8", ScientificMode, 14);
+  assert_float_prints_to(123456789.0f, "1.234568ᴇ8", ScientificMode, 7);
+  assert_float_prints_to(123456789.0f, "1.234568ᴇ8", DecimalMode, 7);
+  assert_float_prints_to(123456789.0, "1.23456789ᴇ8", ScientificMode, 14);
   assert_float_prints_to(123456789.0, "123456789", DecimalMode, 14);
 
-  assert_float_prints_to(0.00000123456789f, "1.234568E-6", ScientificMode, 7);
+  assert_float_prints_to(0.00000123456789f, "1.234568ᴇ-6", ScientificMode, 7);
   assert_float_prints_to(0.00000123456789f, "0.000001234568", DecimalMode, 7);
-  assert_float_prints_to(0.00000123456789, "1.23456789E-6", ScientificMode, 14);
+  assert_float_prints_to(0.00000123456789, "1.23456789ᴇ-6", ScientificMode, 14);
   assert_float_prints_to(0.00000123456789, "0.00000123456789", DecimalMode, 14);
 
-  assert_float_prints_to(0.99f, "9.9E-1", ScientificMode, 7);
+  assert_float_prints_to(0.99f, "9.9ᴇ-1", ScientificMode, 7);
   assert_float_prints_to(0.99f, "0.99", DecimalMode, 7);
-  assert_float_prints_to(0.99, "9.9E-1", ScientificMode, 14);
+  assert_float_prints_to(0.99, "9.9ᴇ-1", ScientificMode, 14);
   assert_float_prints_to(0.99, "0.99", DecimalMode, 14);
 
-  assert_float_prints_to(-123.456789f, "-1.234568E2", ScientificMode, 7);
+  assert_float_prints_to(-123.456789f, "-1.234568ᴇ2", ScientificMode, 7);
   assert_float_prints_to(-123.456789f, "-123.4568", DecimalMode, 7);
-  assert_float_prints_to(-123.456789, "-1.23456789E2", ScientificMode, 14);
+  assert_float_prints_to(-123.456789, "-1.23456789ᴇ2", ScientificMode, 14);
   assert_float_prints_to(-123.456789, "-123.456789", DecimalMode, 14);
 
-  assert_float_prints_to(-0.000123456789f, "-1.234568E-4", ScientificMode, 7);
+  assert_float_prints_to(-0.000123456789f, "-1.234568ᴇ-4", ScientificMode, 7);
   assert_float_prints_to(-0.000123456789f, "-0.0001234568", DecimalMode, 7);
-  assert_float_prints_to(-0.000123456789, "-1.23456789E-4", ScientificMode, 14);
+  assert_float_prints_to(-0.000123456789, "-1.23456789ᴇ-4", ScientificMode, 14);
   assert_float_prints_to(-0.000123456789, "-0.000123456789", DecimalMode, 14);
 
   assert_float_prints_to(0.0f, "0", ScientificMode, 7);
@@ -103,86 +103,86 @@ QUIZ_CASE(assert_float_prints_to) {
   assert_float_prints_to(0.0, "0", ScientificMode, 14);
   assert_float_prints_to(0.0, "0", DecimalMode, 14);
 
-  assert_float_prints_to(10000000000000000000000000000.0, "1E28", ScientificMode, 7);
+  assert_float_prints_to(10000000000000000000000000000.0, "1ᴇ28", ScientificMode, 7);
   /* Converting 10000000000000000000000000000.0f into a decimal display would
    * overflow the number of significant digits set to 7. When this is the case, the
    * display mode is automatically set to scientific. */
-  assert_float_prints_to(10000000000000000000000000000.0, "1E28", DecimalMode, 7);
-  assert_float_prints_to(10000000000000000000000000000.0, "1E28", ScientificMode, 14);
-  assert_float_prints_to(10000000000000000000000000000.0, "1E28", DecimalMode, 14);
+  assert_float_prints_to(10000000000000000000000000000.0, "1ᴇ28", DecimalMode, 7);
+  assert_float_prints_to(10000000000000000000000000000.0, "1ᴇ28", ScientificMode, 14);
+  assert_float_prints_to(10000000000000000000000000000.0, "1ᴇ28", DecimalMode, 14);
 
-  assert_float_prints_to(1000000.0f, "1E6", ScientificMode, 7);
+  assert_float_prints_to(1000000.0f, "1ᴇ6", ScientificMode, 7);
   assert_float_prints_to(1000000.0f, "1000000", DecimalMode, 7);
-  assert_float_prints_to(1000000.0, "1E6", ScientificMode, 14);
+  assert_float_prints_to(1000000.0, "1ᴇ6", ScientificMode, 14);
   assert_float_prints_to(1000000.0, "1000000", DecimalMode);
 
-  assert_float_prints_to(10000000.0f, "1E7", ScientificMode, 7);
-  assert_float_prints_to(10000000.0f, "1E7", DecimalMode, 7);
-  assert_float_prints_to(10000000.0, "1E7", ScientificMode, 14);
+  assert_float_prints_to(10000000.0f, "1ᴇ7", ScientificMode, 7);
+  assert_float_prints_to(10000000.0f, "1ᴇ7", DecimalMode, 7);
+  assert_float_prints_to(10000000.0, "1ᴇ7", ScientificMode, 14);
   assert_float_prints_to(10000000.0, "10000000", DecimalMode, 14);
 
-  assert_float_prints_to(0.0000001, "1E-7", ScientificMode, 7);
+  assert_float_prints_to(0.0000001, "1ᴇ-7", ScientificMode, 7);
   /* Converting 0.00000001f into a decimal display would also overflow the
    * number of significant digits set to 7. */
   assert_float_prints_to(0.0000001f, "0.0000001", DecimalMode, 7);
-  assert_float_prints_to(0.0000001, "1E-7", ScientificMode, 14);
+  assert_float_prints_to(0.0000001, "1ᴇ-7", ScientificMode, 14);
   assert_float_prints_to(0.0000001, "0.0000001", DecimalMode, 14);
 
-  assert_float_prints_to(-0.000000000000000000000000000000009090018f, "-9.090018E-33", ScientificMode, 7);
-  assert_float_prints_to(-0.000000000000000000000000000000009090018f, "-9.090018E-33", DecimalMode, 7);
-  assert_float_prints_to(-0.000000000000000000000000000000009090018, "-9.090018E-33", ScientificMode, 14);
-  assert_float_prints_to(-0.000000000000000000000000000000009090018, "-9.090018E-33", DecimalMode, 14);
+  assert_float_prints_to(-0.000000000000000000000000000000009090018f, "-9.090018ᴇ-33", ScientificMode, 7);
+  assert_float_prints_to(-0.000000000000000000000000000000009090018f, "-9.090018ᴇ-33", DecimalMode, 7);
+  assert_float_prints_to(-0.000000000000000000000000000000009090018, "-9.090018ᴇ-33", ScientificMode, 14);
+  assert_float_prints_to(-0.000000000000000000000000000000009090018, "-9.090018ᴇ-33", DecimalMode, 14);
 
-  assert_float_prints_to(123.421f, "1.23421E2", ScientificMode, 7);
+  assert_float_prints_to(123.421f, "1.23421ᴇ2", ScientificMode, 7);
   assert_float_prints_to(123.421f, "123.4", DecimalMode, 4, 6);
-  assert_float_prints_to(123.421f, "1.2E2", ScientificMode, 4, 6);
+  assert_float_prints_to(123.421f, "1.2ᴇ2", ScientificMode, 4, 8); // 'ᴇ' uses 3 bytes
 
-  assert_float_prints_to(9.999999f, "1E1", ScientificMode, 6);
+  assert_float_prints_to(9.999999f, "1ᴇ1", ScientificMode, 6);
   assert_float_prints_to(9.999999f, "10", DecimalMode, 6);
   assert_float_prints_to(9.999999f, "9.999999", ScientificMode, 7);
   assert_float_prints_to(9.999999f, "9.999999", DecimalMode, 7);
 
-  assert_float_prints_to(-9.99999904f, "-1E1", ScientificMode, 6);
+  assert_float_prints_to(-9.99999904f, "-1ᴇ1", ScientificMode, 6);
   assert_float_prints_to(-9.99999904f, "-10", DecimalMode, 6);
   assert_float_prints_to(-9.99999904, "-9.999999", ScientificMode, 7);
   assert_float_prints_to(-9.99999904, "-9.999999", DecimalMode, 7);
 
-  assert_float_prints_to(-0.017452f, "-1.745E-2", ScientificMode, 4);
+  assert_float_prints_to(-0.017452f, "-1.745ᴇ-2", ScientificMode, 4);
   assert_float_prints_to(-0.017452f, "-0.01745", DecimalMode, 4);
-  assert_float_prints_to(-0.017452, "-1.7452E-2", ScientificMode, 14);
+  assert_float_prints_to(-0.017452, "-1.7452ᴇ-2", ScientificMode, 14);
   assert_float_prints_to(-0.017452, "-0.017452", DecimalMode, 14);
 
-  assert_float_prints_to(1E50, "1E50", ScientificMode, 9);
-  assert_float_prints_to(1E50, "1E50", DecimalMode, 9);
-  assert_float_prints_to(1E50, "1E50", ScientificMode, 14);
-  assert_float_prints_to(1E50, "1E50", DecimalMode, 14);
+  assert_float_prints_to(1E50, "1ᴇ50", ScientificMode, 9);
+  assert_float_prints_to(1E50, "1ᴇ50", DecimalMode, 9);
+  assert_float_prints_to(1E50, "1ᴇ50", ScientificMode, 14);
+  assert_float_prints_to(1E50, "1ᴇ50", DecimalMode, 14);
 
-  assert_float_prints_to(100.0, "1E2", ScientificMode, 9);
+  assert_float_prints_to(100.0, "1ᴇ2", ScientificMode, 9);
   assert_float_prints_to(100.0, "100", DecimalMode, 9);
 
-  assert_float_prints_to(12345.678910121314f, "1.234568E4", ScientificMode, 7);
+  assert_float_prints_to(12345.678910121314f, "1.234568ᴇ4", ScientificMode, 7);
   assert_float_prints_to(12345.678910121314f, "12345.68", DecimalMode, 7);
-  assert_float_prints_to(12345.678910121314, "1.2345678910121E4", ScientificMode, 14);
+  assert_float_prints_to(12345.678910121314, "1.2345678910121ᴇ4", ScientificMode, 14);
   assert_float_prints_to(12345.678910121314, "12345.678910121", DecimalMode, 14);
 
-  assert_float_prints_to(9.999999999999999999999E12, "1E13", ScientificMode, 9);
-  assert_float_prints_to(9.999999999999999999999E12, "1E13", DecimalMode, 9);
-  assert_float_prints_to(9.999999999999999999999E12, "1E13", ScientificMode, 14);
+  assert_float_prints_to(9.999999999999999999999E12, "1ᴇ13", ScientificMode, 9);
+  assert_float_prints_to(9.999999999999999999999E12, "1ᴇ13", DecimalMode, 9);
+  assert_float_prints_to(9.999999999999999999999E12, "1ᴇ13", ScientificMode, 14);
   assert_float_prints_to(9.999999999999999999999E12, "10000000000000", DecimalMode, 14);
 
-  assert_float_prints_to(-0.000000099999999f, "-1E-7", ScientificMode, 7);
+  assert_float_prints_to(-0.000000099999999f, "-1ᴇ-7", ScientificMode, 7);
   assert_float_prints_to(-0.000000099999999f, "-0.0000001", DecimalMode, 7);
-  assert_float_prints_to(-0.000000099999999, "-9.9999999E-8", ScientificMode, 9);
+  assert_float_prints_to(-0.000000099999999, "-9.9999999ᴇ-8", ScientificMode, 9);
   assert_float_prints_to(-0.000000099999999, "-0.000000099999999", DecimalMode, 9);
 
-  assert_float_prints_to(999.99999999999977f, "1E3", ScientificMode, 5);
+  assert_float_prints_to(999.99999999999977f, "1ᴇ3", ScientificMode, 5);
   assert_float_prints_to(999.99999999999977f, "1000", DecimalMode, 5);
-  assert_float_prints_to(999.99999999999977, "1E3", ScientificMode, 14);
+  assert_float_prints_to(999.99999999999977, "1ᴇ3", ScientificMode, 14);
   assert_float_prints_to(999.99999999999977, "1000", DecimalMode, 14);
 
-  assert_float_prints_to(0.000000999999997, "1E-6", ScientificMode, 7);
+  assert_float_prints_to(0.000000999999997, "1ᴇ-6", ScientificMode, 7);
   assert_float_prints_to(0.000000999999997, "0.000001", DecimalMode, 7);
-  assert_float_prints_to(9999999.97, "1E7", DecimalMode, 7);
+  assert_float_prints_to(9999999.97, "1ᴇ7", DecimalMode, 7);
   assert_float_prints_to(9999999.97, "10000000", DecimalMode, 8);
 }
 
@@ -194,51 +194,51 @@ QUIZ_CASE(poincare_rational_to_text) {
 
 QUIZ_CASE(poincare_decimal_to_text) {
   Decimal d0 = Decimal::Builder(Integer("-123456789"),30);
-  assert_expression_prints_to(d0, "-1.23456789E30", ScientificMode, 14);
-  assert_expression_prints_to(d0, "-1.234568E30", DecimalMode, 7);
+  assert_expression_prints_to(d0, "-1.23456789ᴇ30", ScientificMode, 14);
+  assert_expression_prints_to(d0, "-1.234568ᴇ30", DecimalMode, 7);
   Decimal d1 = Decimal::Builder(Integer("123456789"),30);
-  assert_expression_prints_to(d1, "1.23456789E30", ScientificMode, 14);
-  assert_expression_prints_to(d1, "1.235E30", DecimalMode, 4);
+  assert_expression_prints_to(d1, "1.23456789ᴇ30", ScientificMode, 14);
+  assert_expression_prints_to(d1, "1.235ᴇ30", DecimalMode, 4);
   Decimal d2 = Decimal::Builder(Integer("-123456789"),-30);
-  assert_expression_prints_to(d2, "-1.23456789E-30", DecimalMode, 14);
-  assert_expression_prints_to(d2, "-1.235E-30", ScientificMode, 4);
+  assert_expression_prints_to(d2, "-1.23456789ᴇ-30", DecimalMode, 14);
+  assert_expression_prints_to(d2, "-1.235ᴇ-30", ScientificMode, 4);
   Decimal d3 = Decimal::Builder(Integer("-12345"),-3);
   assert_expression_prints_to(d3, "-0.0012345", DecimalMode, 7);
   assert_expression_prints_to(d3, "-0.00123", DecimalMode, 3);
   assert_expression_prints_to(d3, "-0.001235", DecimalMode, 4);
-  assert_expression_prints_to(d3, "-1.23E-3", ScientificMode, 3);
+  assert_expression_prints_to(d3, "-1.23ᴇ-3", ScientificMode, 3);
   Decimal d4 = Decimal::Builder(Integer("12345"),-3);
   assert_expression_prints_to(d4, "0.0012345", DecimalMode, 7);
-  assert_expression_prints_to(d4, "1.2E-3", ScientificMode, 2);
+  assert_expression_prints_to(d4, "1.2ᴇ-3", ScientificMode, 2);
   Decimal d5 = Decimal::Builder(Integer("12345"),3);
   assert_expression_prints_to(d5, "1234.5", DecimalMode, 7);
-  assert_expression_prints_to(d5, "1.23E3", DecimalMode, 3);
+  assert_expression_prints_to(d5, "1.23ᴇ3", DecimalMode, 3);
   assert_expression_prints_to(d5, "1235", DecimalMode, 4);
-  assert_expression_prints_to(d5, "1.235E3", ScientificMode, 4);
+  assert_expression_prints_to(d5, "1.235ᴇ3", ScientificMode, 4);
   Decimal d6 = Decimal::Builder(Integer("-12345"),3);
   assert_expression_prints_to(d6, "-1234.5", DecimalMode, 7);
-  assert_expression_prints_to(d6, "-1.2345E3", ScientificMode, 10);
+  assert_expression_prints_to(d6, "-1.2345ᴇ3", ScientificMode, 10);
   Decimal d7 = Decimal::Builder(Integer("12345"),6);
   assert_expression_prints_to(d7, "1234500", DecimalMode, 7);
-  assert_expression_prints_to(d7, "1.2345E6", DecimalMode, 6);
-  assert_expression_prints_to(d7, "1.2345E6", ScientificMode);
+  assert_expression_prints_to(d7, "1.2345ᴇ6", DecimalMode, 6);
+  assert_expression_prints_to(d7, "1.2345ᴇ6", ScientificMode);
   Decimal d8 = Decimal::Builder(Integer("-12345"),6);
   assert_expression_prints_to(d8, "-1234500", DecimalMode, 7);
-  assert_expression_prints_to(d8, "-1.2345E6", DecimalMode, 5);
-  assert_expression_prints_to(d7, "1.235E6", ScientificMode, 4);
+  assert_expression_prints_to(d8, "-1.2345ᴇ6", DecimalMode, 5);
+  assert_expression_prints_to(d7, "1.235ᴇ6", ScientificMode, 4);
   Decimal d9 = Decimal::Builder(Integer("-12345"),-1);
   assert_expression_prints_to(d9, "-0.12345", DecimalMode, 7);
   assert_expression_prints_to(d9, "-0.1235", DecimalMode, 4);
-  assert_expression_prints_to(d9, "-1.235E-1", ScientificMode, 4);
+  assert_expression_prints_to(d9, "-1.235ᴇ-1", ScientificMode, 4);
   Decimal d10 = Decimal::Builder(Integer("12345"),-1);
-  assert_expression_prints_to(d10, "1.2345E-1");
+  assert_expression_prints_to(d10, "1.2345ᴇ-1");
   assert_expression_prints_to(d10, "0.12345", DecimalMode, 7);
   assert_expression_prints_to(d10, "0.1235", DecimalMode, 4);
-  assert_expression_prints_to(d10, "1.235E-1", ScientificMode, 4);
+  assert_expression_prints_to(d10, "1.235ᴇ-1", ScientificMode, 4);
 
-  assert_expression_prints_to(Decimal::Builder(-1.23456789E30), "-1.23456789E30", ScientificMode, 14);
-  assert_expression_prints_to(Decimal::Builder(1.23456789E30), "1.23456789E30", ScientificMode, 14);
-  assert_expression_prints_to(Decimal::Builder(-1.23456789E-30), "-1.23456789E-30", ScientificMode, 14);
+  assert_expression_prints_to(Decimal::Builder(-1.23456789E30), "-1.23456789ᴇ30", ScientificMode, 14);
+  assert_expression_prints_to(Decimal::Builder(1.23456789E30), "1.23456789ᴇ30", ScientificMode, 14);
+  assert_expression_prints_to(Decimal::Builder(-1.23456789E-30), "-1.23456789ᴇ-30", ScientificMode, 14);
   assert_expression_prints_to(Decimal::Builder(-1.2345E-3), "-0.0012345", DecimalMode);
   assert_expression_prints_to(Decimal::Builder(1.2345E-3), "0.0012345", DecimalMode);
   assert_expression_prints_to(Decimal::Builder(1.2345E3), "1234.5", DecimalMode);
@@ -249,28 +249,28 @@ QUIZ_CASE(poincare_decimal_to_text) {
   assert_expression_prints_to(Decimal::Builder(1.2345E-1), "0.12345", DecimalMode);
   assert_expression_prints_to(Decimal::Builder(1.0), "1");
   assert_expression_prints_to(Decimal::Builder(0.9999999999999996), "1");
-  assert_expression_prints_to(Decimal::Builder(0.99999999999995), "9.9999999999995E-1", ScientificMode, 14);
-  assert_expression_prints_to(Decimal::Builder(0.00000099999999999995), "9.9999999999995E-7", ScientificMode, 14);
+  assert_expression_prints_to(Decimal::Builder(0.99999999999995), "9.9999999999995ᴇ-1", ScientificMode, 14);
+  assert_expression_prints_to(Decimal::Builder(0.00000099999999999995), "9.9999999999995ᴇ-7", ScientificMode, 14);
   assert_expression_prints_to(Decimal::Builder(0.000000999999999999995), "0.000001", DecimalMode);
-  assert_expression_prints_to(Decimal::Builder(0.000000999999999901200121020102010201201201021099995), "9.999999999012E-7", DecimalMode, 14);
+  assert_expression_prints_to(Decimal::Builder(0.000000999999999901200121020102010201201201021099995), "9.999999999012ᴇ-7", DecimalMode, 14);
   assert_expression_prints_to(Decimal::Builder(9999999999999.54), "9999999999999.5", DecimalMode, 14);
-  assert_expression_prints_to(Decimal::Builder(99999999999999.54), "1E14", DecimalMode, 14);
-  assert_expression_prints_to(Decimal::Builder(999999999999999.54), "1E15", DecimalMode, 14);
-  assert_expression_prints_to(Decimal::Builder(9999999999999999.54), "1E16", DecimalMode, 14);
-  assert_expression_prints_to(Decimal::Builder(-9.702365051313E-297), "-9.702365051313E-297", DecimalMode, 14);
+  assert_expression_prints_to(Decimal::Builder(99999999999999.54), "1ᴇ14", DecimalMode, 14);
+  assert_expression_prints_to(Decimal::Builder(999999999999999.54), "1ᴇ15", DecimalMode, 14);
+  assert_expression_prints_to(Decimal::Builder(9999999999999999.54), "1ᴇ16", DecimalMode, 14);
+  assert_expression_prints_to(Decimal::Builder(-9.702365051313E-297), "-9.702365051313ᴇ-297", DecimalMode, 14);
 }
 
 QUIZ_CASE(poincare_approximation_to_text) {
-  assert_expression_prints_to(Float<double>::Builder(-1.23456789E30), "-1.23456789E30", DecimalMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(1.23456789E30), "1.23456789E30", DecimalMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(-1.23456789E-30), "-1.23456789E-30", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(-1.23456789E30), "-1.23456789ᴇ30", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(1.23456789E30), "1.23456789ᴇ30", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(-1.23456789E-30), "-1.23456789ᴇ-30", DecimalMode, 14);
   assert_expression_prints_to(Float<double>::Builder(-1.2345E-3), "-0.0012345", DecimalMode);
   assert_expression_prints_to(Float<double>::Builder(1.2345E-3), "0.0012345", DecimalMode);
   assert_expression_prints_to(Float<double>::Builder(1.2345E3), "1234.5", DecimalMode);
   assert_expression_prints_to(Float<double>::Builder(-1.2345E3), "-1234.5", DecimalMode);
-  assert_expression_prints_to(Float<double>::Builder(0.99999999999995), "9.9999999999995E-1", ScientificMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(0.00000099999999999995), "9.9999999999995E-7", DecimalMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(0.0000009999999999901200121020102010201201201021099995), "9.9999999999012E-7", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(0.99999999999995), "9.9999999999995ᴇ-1", ScientificMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(0.00000099999999999995), "9.9999999999995ᴇ-7", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(0.0000009999999999901200121020102010201201201021099995), "9.9999999999012ᴇ-7", DecimalMode, 14);
   assert_expression_prints_to(Float<float>::Builder(1.2345E-1), "0.12345", DecimalMode);
   assert_expression_prints_to(Float<float>::Builder(1), "1", DecimalMode);
   assert_expression_prints_to(Float<float>::Builder(0.9999999999999995), "1", DecimalMode);
diff --git a/poincare/test/decimal.cpp b/poincare/test/decimal.cpp
index bb91c0114..f3c17ff3d 100644
--- a/poincare/test/decimal.cpp
+++ b/poincare/test/decimal.cpp
@@ -47,13 +47,13 @@ QUIZ_CASE(poincare_decimal_properties) {
 
 QUIZ_CASE(poincare_decimal_simplify) {
   assert_parsed_expression_simplify_to("-2.3", "-23/10");
-  assert_parsed_expression_simplify_to("-232.2E-4", "-1161/50000");
-  assert_parsed_expression_simplify_to("0000.000000E-2", "0");
+  assert_parsed_expression_simplify_to("-232.2ᴇ-4", "-1161/50000");
+  assert_parsed_expression_simplify_to("0000.000000ᴇ-2", "0");
   assert_parsed_expression_simplify_to(".000000", "0");
   assert_parsed_expression_simplify_to("0000", "0");
 }
 
 QUIZ_CASE(poincare_decimal_approximate) {
-  assert_parsed_expression_evaluates_to<float>("1.2343E-2", "0.012343");
-  assert_parsed_expression_evaluates_to<double>("-567.2E2", "-56720");
+  assert_parsed_expression_evaluates_to<float>("1.2343ᴇ-2", "0.012343");
+  assert_parsed_expression_evaluates_to<double>("-567.2ᴇ2", "-56720");
 }
diff --git a/poincare/test/division.cpp b/poincare/test/division.cpp
index 0895d8d3d..7e0ea43d2 100644
--- a/poincare/test/division.cpp
+++ b/poincare/test/division.cpp
@@ -8,16 +8,16 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_division_evaluate) {
   assert_parsed_expression_evaluates_to<float>("1/2", "0.5");
-  assert_parsed_expression_evaluates_to<double>("(3+I)/(4+I)", "7.6470588235294E-1+5.8823529411765E-2*I");
+  assert_parsed_expression_evaluates_to<double>("(3+𝐢)/(4+𝐢)", "7.6470588235294ᴇ-1+5.8823529411765ᴇ-2×𝐢");
 
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]/2", "[[0.5,1][1.5,2][2.5,3]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]/(1+I)", "[[0.5-0.5*I,1.5-0.5*I][1.5-1.5*I,2-2*I][2.5-2.5*I,3-3*I]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]/(1+𝐢)", "[[0.5-0.5×𝐢,1.5-0.5×𝐢][1.5-1.5×𝐢,2-2×𝐢][2.5-2.5×𝐢,3-3×𝐢]]");
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]/2", "[[0.5,1][1.5,2][2.5,3]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2][3,4]]/[[3,4][6,9]]", "[[-1,6.6666666666667E-1][1,0]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2][3,4]]/[[3,4][6,9]]", "[[-1,6.6666666666667ᴇ-1][1,0]]");
   assert_parsed_expression_evaluates_to<double>("3/[[3,4][5,6]]", "[[-9,6][7.5,-4.5]]");
-  assert_parsed_expression_evaluates_to<double>("(3+4I)/[[1,I][3,4]]", "[[4*I,1][-3*I,I]]");
+  assert_parsed_expression_evaluates_to<double>("(3+4𝐢)/[[1,𝐢][3,4]]", "[[4×𝐢,1][-3×𝐢,𝐢]]");
 #endif
-  assert_parsed_expression_evaluates_to<float>("1E20/(1E20+1E20I)", "0.5-0.5*I");
-  assert_parsed_expression_evaluates_to<double>("1E155/(1E155+1E155I)", "0.5-0.5*I");
+  assert_parsed_expression_evaluates_to<float>("1ᴇ20/(1ᴇ20+1ᴇ20𝐢)", "0.5-0.5×𝐢");
+  assert_parsed_expression_evaluates_to<double>("1ᴇ155/(1ᴇ155+1ᴇ155𝐢)", "0.5-0.5×𝐢");
 }
diff --git a/poincare/test/factorial.cpp b/poincare/test/factorial.cpp
index 09b63d367..5ab7884f1 100644
--- a/poincare/test/factorial.cpp
+++ b/poincare/test/factorial.cpp
@@ -9,6 +9,6 @@ QUIZ_CASE(poincare_factorial_simplify) {
   assert_parsed_expression_simplify_to("1/3!", "1/6");
   assert_parsed_expression_simplify_to("5!", "120");
   assert_parsed_expression_simplify_to("(1/3)!", Undefined::Name());
-  assert_parsed_expression_simplify_to("P!", Undefined::Name());
-  assert_parsed_expression_simplify_to("X!", Undefined::Name());
+  assert_parsed_expression_simplify_to("π!", Undefined::Name());
+  assert_parsed_expression_simplify_to("ℯ!", Undefined::Name());
 }
diff --git a/poincare/test/float.cpp b/poincare/test/float.cpp
index 009cbc867..756327396 100644
--- a/poincare/test/float.cpp
+++ b/poincare/test/float.cpp
@@ -21,16 +21,16 @@ void assert_float_evaluates_to(Float<T> f, const char * result) {
 }
 
 QUIZ_CASE(poincare_float_evaluate) {
-  assert_float_evaluates_to<double>(Float<double>::Builder(-1.23456789E30), "-1.23456789E30");
-  assert_float_evaluates_to<double>(Float<double>::Builder(1.23456789E30), "1.23456789E30");
-  assert_float_evaluates_to<double>(Float<double>::Builder(-1.23456789E-30), "-1.23456789E-30");
+  assert_float_evaluates_to<double>(Float<double>::Builder(-1.23456789E30), "-1.23456789ᴇ30");
+  assert_float_evaluates_to<double>(Float<double>::Builder(1.23456789E30), "1.23456789ᴇ30");
+  assert_float_evaluates_to<double>(Float<double>::Builder(-1.23456789E-30), "-1.23456789ᴇ-30");
   assert_float_evaluates_to<double>(Float<double>::Builder(-1.2345E-3), "-0.0012345");
   assert_float_evaluates_to<double>(Float<double>::Builder(1.2345E-3), "0.0012345");
   assert_float_evaluates_to<double>(Float<double>::Builder(1.2345E3), "1234.5");
   assert_float_evaluates_to<double>(Float<double>::Builder(-1.2345E3), "-1234.5");
-  assert_float_evaluates_to<double>(Float<double>::Builder(0.99999999999995), "9.9999999999995E-1");
-  assert_float_evaluates_to<double>(Float<double>::Builder(0.00000099999999999995), "9.9999999999995E-7");
-  assert_float_evaluates_to<double>(Float<double>::Builder(0.0000009999999999901200121020102010201201201021099995), "9.9999999999012E-7");
+  assert_float_evaluates_to<double>(Float<double>::Builder(0.99999999999995), "9.9999999999995ᴇ-1");
+  assert_float_evaluates_to<double>(Float<double>::Builder(0.00000099999999999995), "9.9999999999995ᴇ-7");
+  assert_float_evaluates_to<double>(Float<double>::Builder(0.0000009999999999901200121020102010201201201021099995), "9.9999999999012ᴇ-7");
   assert_float_evaluates_to<float>(Float<float>::Builder(1.2345E-1), "0.12345");
   assert_float_evaluates_to<float>(Float<float>::Builder(1), "1");
   assert_float_evaluates_to<float>(Float<float>::Builder(0.9999999999999995), "1");
diff --git a/poincare/test/function.cpp b/poincare/test/function.cpp
index 9b7d343c7..f8a406032 100644
--- a/poincare/test/function.cpp
+++ b/poincare/test/function.cpp
@@ -20,9 +20,9 @@ QUIZ_CASE(poincare_parse_function) {
   assert_parsed_expression_type("abs(-1)", ExpressionNode::Type::AbsoluteValue);
   assert_parsed_expression_type("binomial(10, 4)", ExpressionNode::Type::BinomialCoefficient);
   assert_parsed_expression_type("ceil(0.2)", ExpressionNode::Type::Ceiling);
-  assert_parsed_expression_type("arg(2+I)", ExpressionNode::Type::ComplexArgument);
+  assert_parsed_expression_type("arg(2+𝐢)", ExpressionNode::Type::ComplexArgument);
   assert_parsed_expression_type("det([[1,2,3][4,5,6][7,8,9]])", ExpressionNode::Type::Determinant);
-  assert_parsed_expression_type("diff(2*x, x, 2)", ExpressionNode::Type::Derivative);
+  assert_parsed_expression_type("diff(2×x, x, 2)", ExpressionNode::Type::Derivative);
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_type("dim([[2]])", ExpressionNode::Type::MatrixDimension);
 #endif
@@ -32,7 +32,7 @@ QUIZ_CASE(poincare_parse_function) {
   assert_parsed_expression_type("floor(2.3)", ExpressionNode::Type::Floor);
   assert_parsed_expression_type("frac(2.3)", ExpressionNode::Type::FracPart);
   assert_parsed_expression_type("gcd(2,3)", ExpressionNode::Type::GreatCommonDivisor);
-  assert_parsed_expression_type("im(2+I)", ExpressionNode::Type::ImaginaryPart);
+  assert_parsed_expression_type("im(2+𝐢)", ExpressionNode::Type::ImaginaryPart);
   assert_parsed_expression_type("lcm(2,3)", ExpressionNode::Type::LeastCommonMultiple);
   assert_parsed_expression_type("int(x, x, 2, 3)", ExpressionNode::Type::Integral);
 #if MATRICES_ARE_DEFINED
@@ -49,10 +49,10 @@ QUIZ_CASE(poincare_parse_function) {
   assert_parsed_expression_type("random()", ExpressionNode::Type::Random);
   assert_parsed_expression_type("randint(1, 2)", ExpressionNode::Type::Randint);
 
-  assert_parsed_expression_type("re(2+I)", ExpressionNode::Type::RealPart);
+  assert_parsed_expression_type("re(2+𝐢)", ExpressionNode::Type::RealPart);
   assert_parsed_expression_type("rem(29, 10)", ExpressionNode::Type::DivisionRemainder);
   assert_parsed_expression_type("root(2,3)", ExpressionNode::Type::NthRoot);
-  assert_parsed_expression_type("R(2)", ExpressionNode::Type::SquareRoot);
+  assert_parsed_expression_type("√(2)", ExpressionNode::Type::SquareRoot);
   assert_parsed_expression_type("round(2,3)", ExpressionNode::Type::Round);
   assert_parsed_expression_type("sign(3)", ExpressionNode::Type::SignFunction);
   assert_parsed_expression_type("sum(n,n, 4, 10)", ExpressionNode::Type::Sum);
@@ -68,14 +68,14 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("abs(-1)", "1");
   assert_parsed_expression_evaluates_to<double>("abs(-1)", "1");
 
-  assert_parsed_expression_evaluates_to<float>("abs(3+2I)", "3.605551");
-  assert_parsed_expression_evaluates_to<double>("abs(3+2I)", "3.605551275464");
+  assert_parsed_expression_evaluates_to<float>("abs(3+2𝐢)", "3.605551");
+  assert_parsed_expression_evaluates_to<double>("abs(3+2𝐢)", "3.605551275464");
 
   assert_parsed_expression_evaluates_to<float>("abs([[1,-2][3,-4]])", "[[1,2][3,4]]");
   assert_parsed_expression_evaluates_to<double>("abs([[1,-2][3,-4]])", "[[1,2][3,4]]");
 
-  assert_parsed_expression_evaluates_to<float>("abs([[3+2I,3+4I][5+2I,3+2I]])", "[[3.605551,5][5.385165,3.605551]]");
-  assert_parsed_expression_evaluates_to<double>("abs([[3+2I,3+4I][5+2I,3+2I]])", "[[3.605551275464,5][5.3851648071345,3.605551275464]]");
+  assert_parsed_expression_evaluates_to<float>("abs([[3+2𝐢,3+4𝐢][5+2𝐢,3+2𝐢]])", "[[3.605551,5][5.385165,3.605551]]");
+  assert_parsed_expression_evaluates_to<double>("abs([[3+2𝐢,3+4𝐢][5+2𝐢,3+2𝐢]])", "[[3.605551275464,5][5.3851648071345,3.605551275464]]");
 
   assert_parsed_expression_evaluates_to<float>("binomial(10, 4)", "210");
   assert_parsed_expression_evaluates_to<double>("binomial(10, 4)", "210");
@@ -86,14 +86,16 @@ QUIZ_CASE(poincare_function_evaluate) {
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("det([[1,23,3][4,5,6][7,8,9]])", "126", System, Degree, Cartesian, 6); // FIXME: the determinant computation is not precised enough to be displayed with 7 significant digits
   assert_parsed_expression_evaluates_to<double>("det([[1,23,3][4,5,6][7,8,9]])", "126");
-  assert_parsed_expression_evaluates_to<float>("det([[I,23-2I,3*I][4+I,5*I,6][7,8*I+2,9]])", "126-231*I", System, Degree, Cartesian, 6); // FIXME: the determinant computation is not precised enough to be displayed with 7 significant digits
-  assert_parsed_expression_evaluates_to<double>("det([[I,23-2I,3*I][4+I,5*I,6][7,8*I+2,9]])", "126-231*I");
-#endif
-  assert_parsed_expression_evaluates_to<float>("diff(2*x, x, 2)", "2");
-  assert_parsed_expression_evaluates_to<double>("diff(2*x, x, 2)", "2");
 
-  assert_parsed_expression_evaluates_to<float>("diff(2*TO^2, TO, 7)", "28");
-  assert_parsed_expression_evaluates_to<double>("diff(2*TO^2, TO, 7)", "28");
+  assert_parsed_expression_evaluates_to<float>("det([[𝐢,23-2𝐢,3×𝐢][4+𝐢,5×𝐢,6][7,8×𝐢+2,9]])", "126-231×𝐢", System, Degree, Cartesian, 6); // FIXME: the determinant computation is not precised enough to be displayed with 7 significant digits
+  assert_parsed_expression_evaluates_to<double>("det([[𝐢,23-2𝐢,3×𝐢][4+𝐢,5×𝐢,6][7,8×𝐢+2,9]])", "126-231×𝐢");
+#endif
+
+  assert_parsed_expression_evaluates_to<float>("diff(2×x, x, 2)", "2");
+  assert_parsed_expression_evaluates_to<double>("diff(2×x, x, 2)", "2");
+
+  assert_parsed_expression_evaluates_to<float>("diff(2×TO^2, TO, 7)", "28");
+  assert_parsed_expression_evaluates_to<double>("diff(2×TO^2, TO, 7)", "28");
 
   assert_parsed_expression_evaluates_to<float>("floor(2.3)", "2");
   assert_parsed_expression_evaluates_to<double>("floor(2.3)", "2");
@@ -104,8 +106,8 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("gcd(234,394)", "2");
   assert_parsed_expression_evaluates_to<double>("gcd(234,394)", "2");
 
-  assert_parsed_expression_evaluates_to<float>("im(2+3I)", "3");
-  assert_parsed_expression_evaluates_to<double>("im(2+3I)", "3");
+  assert_parsed_expression_evaluates_to<float>("im(2+3𝐢)", "3");
+  assert_parsed_expression_evaluates_to<double>("im(2+3𝐢)", "3");
 
   assert_parsed_expression_evaluates_to<float>("lcm(234,394)", "46098");
   assert_parsed_expression_evaluates_to<double>("lcm(234,394)", "46098");
@@ -114,10 +116,10 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<double>("int(x,x, 1, 2)", "1.5");
 
   assert_parsed_expression_evaluates_to<float>("ln(2)", "0.6931472");
-  assert_parsed_expression_evaluates_to<double>("ln(2)", "6.9314718055995E-1");
+  assert_parsed_expression_evaluates_to<double>("ln(2)", "6.9314718055995ᴇ-1");
 
   assert_parsed_expression_evaluates_to<float>("log(2)", "0.30103");
-  assert_parsed_expression_evaluates_to<double>("log(2)", "3.0102999566398E-1");
+  assert_parsed_expression_evaluates_to<double>("log(2)", "3.0102999566398ᴇ-1");
 
   assert_parsed_expression_evaluates_to<float>("permute(10, 4)", "5040");
   assert_parsed_expression_evaluates_to<double>("permute(10, 4)", "5040");
@@ -128,19 +130,19 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("quo(29, 10)", "2");
   assert_parsed_expression_evaluates_to<double>("quo(29, 10)", "2");
 
-  assert_parsed_expression_evaluates_to<float>("re(2+I)", "2");
-  assert_parsed_expression_evaluates_to<double>("re(2+I)", "2");
+  assert_parsed_expression_evaluates_to<float>("re(2+𝐢)", "2");
+  assert_parsed_expression_evaluates_to<double>("re(2+𝐢)", "2");
 
   assert_parsed_expression_evaluates_to<float>("rem(29, 10)", "9");
   assert_parsed_expression_evaluates_to<double>("rem(29, 10)", "9");
   assert_parsed_expression_evaluates_to<float>("root(2,3)", "1.259921");
   assert_parsed_expression_evaluates_to<double>("root(2,3)", "1.2599210498949");
 
-  assert_parsed_expression_evaluates_to<float>("R(2)", "1.414214");
-  assert_parsed_expression_evaluates_to<double>("R(2)", "1.4142135623731");
+  assert_parsed_expression_evaluates_to<float>("√(2)", "1.414214");
+  assert_parsed_expression_evaluates_to<double>("√(2)", "1.4142135623731");
 
-  assert_parsed_expression_evaluates_to<float>("R(-1)", "I");
-  assert_parsed_expression_evaluates_to<double>("R(-1)", "I");
+  assert_parsed_expression_evaluates_to<float>("√(-1)", "𝐢");
+  assert_parsed_expression_evaluates_to<double>("√(-1)", "𝐢");
 
   assert_parsed_expression_evaluates_to<float>("sum(r,r, 4, 10)", "49");
   assert_parsed_expression_evaluates_to<double>("sum(k,k, 4, 10)", "49");
@@ -158,17 +160,17 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<double>("dim([[1,2,3][4,5,-6]])", "[[2,3]]");
 #endif
 
-  assert_parsed_expression_evaluates_to<float>("conj(3+2*I)", "3-2*I");
-  assert_parsed_expression_evaluates_to<double>("conj(3+2*I)", "3-2*I");
+  assert_parsed_expression_evaluates_to<float>("conj(3+2×𝐢)", "3-2×𝐢");
+  assert_parsed_expression_evaluates_to<double>("conj(3+2×𝐢)", "3-2×𝐢");
 
   assert_parsed_expression_evaluates_to<float>("factor(-23/4)", "-5.75");
   assert_parsed_expression_evaluates_to<double>("factor(-123/24)", "-5.125");
 
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("inverse([[1,2,3][4,5,-6][7,8,9]])", "[[-1.2917,-0.083333,0.375][1.0833,0.16667,-0.25][0.041667,-0.083333,0.041667]]", System, Degree, Cartesian, 5); // inverse is not precise enough to display 7 significative digits
-  assert_parsed_expression_evaluates_to<double>("inverse([[1,2,3][4,5,-6][7,8,9]])", "[[-1.2916666666667,-8.3333333333333E-2,0.375][1.0833333333333,1.6666666666667E-1,-0.25][4.1666666666667E-2,-8.3333333333333E-2,4.1666666666667E-2]]");
-  assert_parsed_expression_evaluates_to<float>("inverse([[I,23-2I,3*I][4+I,5*I,6][7,8*I+2,9]])", "[[-0.0118-0.0455*I,-0.5-0.727*I,0.318+0.489*I][0.0409+0.00364*I,0.04-0.0218*I,-0.0255+0.00091*I][0.00334-0.00182*I,0.361+0.535*I,-0.13-0.358*I]]", System, Degree, Cartesian, 3); // inverse is not precise enough to display 7 significative digits
-  assert_parsed_expression_evaluates_to<double>("inverse([[I,23-2I,3*I][4+I,5*I,6][7,8*I+2,9]])", "[[-0.0118289353958-0.0454959053685*I,-0.500454959054-0.727024567789*I,0.31847133758+0.488626023658*I][0.0409463148317+3.63967242948E-3*I,0.0400363967243-0.0218380345769*I,-0.0254777070064+9.0991810737E-4*I][3.33636639369E-3-1.81983621474E-3*I,0.36093418259+0.534728541098*I,-0.130118289354-0.357597816197*I]]", System, Degree, Cartesian, 12); // FIXME: inverse is not precise enough to display 14 significative digits
+  assert_parsed_expression_evaluates_to<double>("inverse([[1,2,3][4,5,-6][7,8,9]])", "[[-1.2916666666667,-8.3333333333333ᴇ-2,0.375][1.0833333333333,1.6666666666667ᴇ-1,-0.25][4.1666666666667ᴇ-2,-8.3333333333333ᴇ-2,4.1666666666667ᴇ-2]]");
+  assert_parsed_expression_evaluates_to<float>("inverse([[𝐢,23-2𝐢,3×𝐢][4+𝐢,5×𝐢,6][7,8×𝐢+2,9]])", "[[-0.0118-0.0455×𝐢,-0.5-0.727×𝐢,0.318+0.489×𝐢][0.0409+0.00364×𝐢,0.04-0.0218×𝐢,-0.0255+0.00091×𝐢][0.00334-0.00182×𝐢,0.361+0.535×𝐢,-0.13-0.358×𝐢]]", System, Degree, Cartesian, 3); // inverse is not precise enough to display 7 significative digits
+  assert_parsed_expression_evaluates_to<double>("inverse([[𝐢,23-2𝐢,3×𝐢][4+𝐢,5×𝐢,6][7,8×𝐢+2,9]])", "[[-0.0118289353958-0.0454959053685×𝐢,-0.500454959054-0.727024567789×𝐢,0.31847133758+0.488626023658×𝐢][0.0409463148317+3.63967242948ᴇ-3×𝐢,0.0400363967243-0.0218380345769×𝐢,-0.0254777070064+9.0991810737ᴇ-4×𝐢][3.33636639369ᴇ-3-1.81983621474ᴇ-3×𝐢,0.36093418259+0.534728541098×𝐢,-0.130118289354-0.357597816197×𝐢]]", System, Degree, Cartesian, 12); // FIXME: inverse is not precise enough to display 14 significative digits
 #endif
 
   assert_parsed_expression_evaluates_to<float>("prediction(0.1, 100)", "[[0,0.2]]");
@@ -177,20 +179,20 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("prediction95(0.1, 100)", "[[0.0412,0.1588]]");
   assert_parsed_expression_evaluates_to<double>("prediction95(0.1, 100)", "[[0.0412,0.1588]]");
 
-  assert_parsed_expression_evaluates_to<float>("product(2+k*I,k, 1, 5)", "-100-540*I");
-  assert_parsed_expression_evaluates_to<double>("product(2+o*I,o, 1, 5)", "-100-540*I");
+  assert_parsed_expression_evaluates_to<float>("product(2+k×𝐢,k, 1, 5)", "-100-540×𝐢");
+  assert_parsed_expression_evaluates_to<double>("product(2+o×𝐢,o, 1, 5)", "-100-540×𝐢");
 
-  assert_parsed_expression_evaluates_to<float>("root(3+I, 3)", "1.459366+0.1571201*I");
-  assert_parsed_expression_evaluates_to<double>("root(3+I, 3)", "1.4593656008684+1.5712012294394E-1*I");
+  assert_parsed_expression_evaluates_to<float>("root(3+𝐢, 3)", "1.459366+0.1571201×𝐢");
+  assert_parsed_expression_evaluates_to<double>("root(3+𝐢, 3)", "1.4593656008684+1.5712012294394ᴇ-1×𝐢");
 
-  assert_parsed_expression_evaluates_to<float>("root(3, 3+I)", "1.382007-0.1524428*I");
-  assert_parsed_expression_evaluates_to<double>("root(3, 3+I)", "1.3820069623326-0.1524427794159*I");
+  assert_parsed_expression_evaluates_to<float>("root(3, 3+𝐢)", "1.382007-0.1524428×𝐢");
+  assert_parsed_expression_evaluates_to<double>("root(3, 3+𝐢)", "1.3820069623326-0.1524427794159×𝐢");
 
-  assert_parsed_expression_evaluates_to<float>("root(5^((-I)3^9),I)", "3.504", System, Degree, Cartesian, 4);
-  assert_parsed_expression_evaluates_to<double>("root(5^((-I)3^9),I)", "3.5039410843", System, Degree, Cartesian, 11);
+  assert_parsed_expression_evaluates_to<float>("root(5^((-𝐢)3^9),𝐢)", "3.504", System, Degree, Cartesian, 4);
+  assert_parsed_expression_evaluates_to<double>("root(5^((-𝐢)3^9),𝐢)", "3.5039410843", System, Degree, Cartesian, 11);
 
-  assert_parsed_expression_evaluates_to<float>("R(3+I)", "1.755317+0.2848488*I");
-  assert_parsed_expression_evaluates_to<double>("R(3+I)", "1.7553173018244+2.8484878459314E-1*I");
+  assert_parsed_expression_evaluates_to<float>("√(3+𝐢)", "1.755317+0.2848488×𝐢");
+  assert_parsed_expression_evaluates_to<double>("√(3+𝐢)", "1.7553173018244+2.8484878459314ᴇ-1×𝐢");
 
   assert_parsed_expression_evaluates_to<float>("sign(-23+1)", "-1");
   assert_parsed_expression_evaluates_to<float>("sign(inf)", "1");
@@ -198,11 +200,11 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("sign(0)", "0");
   assert_parsed_expression_evaluates_to<float>("sign(-0)", "0");
   assert_parsed_expression_evaluates_to<float>("sign(x)", "undef");
-  assert_parsed_expression_evaluates_to<double>("sign(2+I)", "undef");
+  assert_parsed_expression_evaluates_to<double>("sign(2+𝐢)", "undef");
   assert_parsed_expression_evaluates_to<double>("sign(undef)", "undef");
 
-  assert_parsed_expression_evaluates_to<double>("sum(2+n*I,n,1,5)", "10+15*I");
-  assert_parsed_expression_evaluates_to<double>("sum(2+n*I,n,1,5)", "10+15*I");
+  assert_parsed_expression_evaluates_to<double>("sum(2+n×𝐢,n,1,5)", "10+15×𝐢");
+  assert_parsed_expression_evaluates_to<double>("sum(2+n×𝐢,n,1,5)", "10+15×𝐢");
 
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("transpose([[1,2,3][4,5,-6][7,8,9]])", "[[1,4,7][2,5,8][3,-6,9]]");
@@ -219,14 +221,14 @@ QUIZ_CASE(poincare_function_evaluate) {
   assert_parsed_expression_evaluates_to<float>("6!", "720");
   assert_parsed_expression_evaluates_to<double>("6!", "720");
 
-  assert_parsed_expression_evaluates_to<float>("R(-1)", "I");
-  assert_parsed_expression_evaluates_to<double>("R(-1)", "I");
+  assert_parsed_expression_evaluates_to<float>("√(-1)", "𝐢");
+  assert_parsed_expression_evaluates_to<double>("√(-1)", "𝐢");
 
-  assert_parsed_expression_evaluates_to<float>("root(-1,3)", "0.5+0.8660254*I");
-  assert_parsed_expression_evaluates_to<double>("root(-1,3)", "0.5+8.6602540378444E-1*I");
+  assert_parsed_expression_evaluates_to<float>("root(-1,3)", "0.5+0.8660254×𝐢");
+  assert_parsed_expression_evaluates_to<double>("root(-1,3)", "0.5+8.6602540378444ᴇ-1×𝐢");
 
-  assert_parsed_expression_evaluates_to<float>("int(int(x*x,x,0,x),x,0,4)", "21.33333");
-  assert_parsed_expression_evaluates_to<double>("int(int(x*x,x,0,x),x,0,4)", "21.333333333333");
+  assert_parsed_expression_evaluates_to<float>("int(int(x×x,x,0,x),x,0,4)", "21.33333");
+  assert_parsed_expression_evaluates_to<double>("int(int(x×x,x,0,x),x,0,4)", "21.333333333333");
 
   assert_parsed_expression_evaluates_to<float>("int(1+cos(e),e, 0, 180)", "180");
   assert_parsed_expression_evaluates_to<double>("int(1+cos(e),e, 0, 180)", "180");
@@ -241,11 +243,11 @@ QUIZ_CASE(poincare_function_evaluate) {
 }
 
 QUIZ_CASE(poincare_function_simplify) {
-  assert_parsed_expression_simplify_to("abs(P)", "P");
-  assert_parsed_expression_simplify_to("abs(-P)", "P");
-  assert_parsed_expression_simplify_to("abs(1+I)", "R(2)");
+  assert_parsed_expression_simplify_to("abs(π)", "π");
+  assert_parsed_expression_simplify_to("abs(-π)", "π");
+  assert_parsed_expression_simplify_to("abs(1+𝐢)", "√(2)");
   assert_parsed_expression_simplify_to("abs(0)", "0");
-  assert_parsed_expression_simplify_to("arg(1+I)", "P/4");
+  assert_parsed_expression_simplify_to("arg(1+𝐢)", "π/4");
   assert_parsed_expression_simplify_to("binomial(20,3)", "1140");
   assert_parsed_expression_simplify_to("binomial(20,10)", "184756");
   assert_parsed_expression_simplify_to("ceil(-1.3)", "-1");
@@ -257,21 +259,21 @@ QUIZ_CASE(poincare_function_simplify) {
   assert_parsed_expression_simplify_to("rem(-19,3)", "2");
   assert_parsed_expression_simplify_to("rem(19,0)", Infinity::Name());
   assert_parsed_expression_simplify_to("99!", "933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582511852109168640000000000000000000000");
-  assert_parsed_expression_simplify_to("factor(-10008/6895)", "-(2^3*3^2*139)/(5*7*197)");
-  assert_parsed_expression_simplify_to("factor(1008/6895)", "(2^4*3^2)/(5*197)");
+  assert_parsed_expression_simplify_to("factor(-10008/6895)", "-(2^3×3^2×139)/(5×7×197)");
+  assert_parsed_expression_simplify_to("factor(1008/6895)", "(2^4×3^2)/(5×197)");
   assert_parsed_expression_simplify_to("factor(10007)", "10007");
   assert_parsed_expression_simplify_to("factor(10007^2)", Undefined::Name());
   assert_parsed_expression_simplify_to("floor(-1.3)", "-2");
   assert_parsed_expression_simplify_to("frac(-1.3)", "7/10");
   assert_parsed_expression_simplify_to("gcd(123,278)", "1");
   assert_parsed_expression_simplify_to("gcd(11,121)", "11");
-  assert_parsed_expression_simplify_to("im(1+5*I)", "5");
+  assert_parsed_expression_simplify_to("im(1+5×𝐢)", "5");
   assert_parsed_expression_simplify_to("lcm(123,278)", "34194");
   assert_parsed_expression_simplify_to("lcm(11,121)", "121");
-  assert_parsed_expression_simplify_to("R(4)", "2");
-  assert_parsed_expression_simplify_to("re(1+5*I)", "1");
+  assert_parsed_expression_simplify_to("√(4)", "2");
+  assert_parsed_expression_simplify_to("re(1+5×𝐢)", "1");
   assert_parsed_expression_simplify_to("root(4,3)", "root(4,3)");
-  assert_parsed_expression_simplify_to("root(4,P)", "4^(1/P)");
+  assert_parsed_expression_simplify_to("root(4,π)", "4^(1/π)");
   assert_parsed_expression_simplify_to("root(27,3)", "3");
   assert_parsed_expression_simplify_to("round(4.235,2)", "106/25");
   assert_parsed_expression_simplify_to("round(4.23,0)", "4");
@@ -279,16 +281,16 @@ QUIZ_CASE(poincare_function_simplify) {
   assert_parsed_expression_simplify_to("round(12.9,-1)", "10");
   assert_parsed_expression_simplify_to("round(12.9,-2)", "0");
   assert_parsed_expression_simplify_to("sign(-23)", "-1");
-  assert_parsed_expression_simplify_to("sign(-I)", "sign(-I)");
+  assert_parsed_expression_simplify_to("sign(-𝐢)", "sign(-𝐢)");
   assert_parsed_expression_simplify_to("sign(0)", "0");
   assert_parsed_expression_simplify_to("sign(inf)", "1");
   assert_parsed_expression_simplify_to("sign(-inf)", "-1");
   assert_parsed_expression_simplify_to("sign(undef)", "undef");
   assert_parsed_expression_simplify_to("sign(23)", "1");
   assert_parsed_expression_simplify_to("sign(log(18))", "1");
-  assert_parsed_expression_simplify_to("sign(-R(2))", "-1");
+  assert_parsed_expression_simplify_to("sign(-√(2))", "-1");
   assert_parsed_expression_simplify_to("sign(x)", "sign(x)");
-  assert_parsed_expression_simplify_to("sign(2+I)", "sign(2+I)");
+  assert_parsed_expression_simplify_to("sign(2+𝐢)", "sign(2+𝐢)");
   assert_parsed_expression_simplify_to("permute(99,4)", "90345024");
   assert_parsed_expression_simplify_to("permute(20,-10)", Undefined::Name());
   assert_parsed_expression_simplify_to("re(1/2)", "1/2");
diff --git a/poincare/test/infinity.cpp b/poincare/test/infinity.cpp
index c84e8765f..bd11f2500 100644
--- a/poincare/test/infinity.cpp
+++ b/poincare/test/infinity.cpp
@@ -16,28 +16,28 @@ QUIZ_CASE(poincare_infinity) {
   assert_parsed_expression_simplify_to("0/0", Undefined::Name());
   assert_parsed_expression_simplify_to("0/inf", "0");
   assert_parsed_expression_simplify_to("inf/0", Undefined::Name());
-  assert_parsed_expression_simplify_to("0*inf", Undefined::Name());
-  assert_parsed_expression_simplify_to("3*inf/inf", "undef");
-  assert_parsed_expression_simplify_to("1E1000", "inf");
-  assert_parsed_expression_simplify_to("-1E1000", "-inf");
-  assert_parsed_expression_simplify_to("-1E-1000", "0");
-  assert_parsed_expression_simplify_to("1E-1000", "0");
-  assert_parsed_expression_evaluates_to<double>("1*10^1000", "inf");
+  assert_parsed_expression_simplify_to("0×inf", Undefined::Name());
+  assert_parsed_expression_simplify_to("3×inf/inf", "undef");
+  assert_parsed_expression_simplify_to("1ᴇ1000", "inf");
+  assert_parsed_expression_simplify_to("-1ᴇ1000", "-inf");
+  assert_parsed_expression_simplify_to("-1ᴇ-1000", "0");
+  assert_parsed_expression_simplify_to("1ᴇ-1000", "0");
+  assert_parsed_expression_evaluates_to<double>("1×10^1000", "inf");
 
   assert_parsed_expression_simplify_to("inf^0", "undef");
   assert_parsed_expression_simplify_to("1^inf", "1^inf");
   assert_parsed_expression_simplify_to("1^(X^inf)", "1^(X^inf)");
   assert_parsed_expression_simplify_to("inf^(-1)", "0");
   assert_parsed_expression_simplify_to("(-inf)^(-1)", "0");
-  assert_parsed_expression_simplify_to("inf^(-R(2))", "0");
-  assert_parsed_expression_simplify_to("(-inf)^(-R(2))", "0");
+  assert_parsed_expression_simplify_to("inf^(-√(2))", "0");
+  assert_parsed_expression_simplify_to("(-inf)^(-√(2))", "0");
   assert_parsed_expression_simplify_to("inf^2", "inf");
   assert_parsed_expression_simplify_to("(-inf)^2", "inf");
-  assert_parsed_expression_simplify_to("inf^R(2)", "inf");
-  assert_parsed_expression_simplify_to("(-inf)^R(2)", "inf*(-1)^R(2)");
+  assert_parsed_expression_simplify_to("inf^√(2)", "inf");
+  assert_parsed_expression_simplify_to("(-inf)^√(2)", "inf×(-1)^√(2)");
   assert_parsed_expression_simplify_to("inf^x", "inf^x");
   assert_parsed_expression_simplify_to("1/inf+24", "24");
-  assert_parsed_expression_simplify_to("X^(inf)/inf", "0*X^inf");
+  assert_parsed_expression_simplify_to("ℯ^(inf)/inf", "0×ℯ^inf");
 
   // Logarithm
   assert_parsed_expression_simplify_to("log(inf,0)", "undef");
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index 05886d548..27b7c272f 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -270,6 +270,6 @@ QUIZ_CASE(poincare_parse_layouts) {
         CodePointLayout::Builder('3'),
         VerticalOffsetLayoutNode::Type::Superscript));
   e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3))));
-  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
+  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   assert_parsed_layout_is(l, e);
 }
diff --git a/poincare/test/logarithm.cpp b/poincare/test/logarithm.cpp
index 8354a4bec..a9df86dc0 100644
--- a/poincare/test/logarithm.cpp
+++ b/poincare/test/logarithm.cpp
@@ -10,16 +10,16 @@ QUIZ_CASE(poincare_logarithm_evaluate) {
   assert_parsed_expression_evaluates_to<double>("log(6,7)", "0.9207822211616");
   assert_parsed_expression_evaluates_to<float>("log(5)", "0.69897");
   assert_parsed_expression_evaluates_to<double>("ln(5)", "1.6094379124341");
-  assert_parsed_expression_evaluates_to<float>("log(2+5*I,64)", "0.4048317+0.2862042*I");
-  assert_parsed_expression_evaluates_to<double>("log(6,7+4*I)", "8.0843880717528E-1-2.0108238082167E-1*I");
-  assert_parsed_expression_evaluates_to<float>("log(5+2*I)", "0.731199+0.1652518*I");
-  assert_parsed_expression_evaluates_to<double>("ln(5+2*I)", "1.6836479149932+3.8050637711236E-1*I");
+  assert_parsed_expression_evaluates_to<float>("log(2+5×𝐢,64)", "0.4048317+0.2862042×𝐢");
+  assert_parsed_expression_evaluates_to<double>("log(6,7+4×𝐢)", "8.0843880717528ᴇ-1-2.0108238082167ᴇ-1×𝐢");
+  assert_parsed_expression_evaluates_to<float>("log(5+2×𝐢)", "0.731199+0.1652518×𝐢");
+  assert_parsed_expression_evaluates_to<double>("ln(5+2×𝐢)", "1.6836479149932+3.8050637711236ᴇ-1×𝐢");
   assert_parsed_expression_evaluates_to<double>("log(0,0)", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("log(0)", "-inf");
   assert_parsed_expression_evaluates_to<double>("log(2,0)", "0");
 
   // WARNING: evaluate on branch cut can be multivalued
-  assert_parsed_expression_evaluates_to<double>("ln(-4)", "1.3862943611199+3.1415926535898*I");
+  assert_parsed_expression_evaluates_to<double>("ln(-4)", "1.3862943611199+3.1415926535898×𝐢");
 }
 
 QUIZ_CASE(poincare_logarithm_simplify) {
@@ -29,35 +29,35 @@ QUIZ_CASE(poincare_logarithm_simplify) {
   assert_parsed_expression_simplify_to("log(2,0)", "0");
   assert_parsed_expression_simplify_to("log(0,14)", "-inf");
   assert_parsed_expression_simplify_to("log(0,0.14)", Infinity::Name());
-  assert_parsed_expression_simplify_to("log(0,0.14+I)", Undefined::Name());
+  assert_parsed_expression_simplify_to("log(0,0.14+𝐢)", Undefined::Name());
   assert_parsed_expression_simplify_to("log(2,1)", Undefined::Name());
   assert_parsed_expression_simplify_to("log(x,1)", Undefined::Name());
-  assert_parsed_expression_simplify_to("log(12925)", "log(47)+log(11)+2*log(5)");
-  assert_parsed_expression_simplify_to("ln(12925)", "ln(47)+ln(11)+2*ln(5)");
-  assert_parsed_expression_simplify_to("log(1742279/12925, 6)", "-log(47,6)+log(17,6)+3*log(11,6)+log(7,6)-2*log(5,6)");
+  assert_parsed_expression_simplify_to("log(12925)", "log(47)+log(11)+2×log(5)");
+  assert_parsed_expression_simplify_to("ln(12925)", "ln(47)+ln(11)+2×ln(5)");
+  assert_parsed_expression_simplify_to("log(1742279/12925, 6)", "-log(47,6)+log(17,6)+3×log(11,6)+log(7,6)-2×log(5,6)");
   assert_parsed_expression_simplify_to("ln(2/3)", "-ln(3)+ln(2)");
   assert_parsed_expression_simplify_to("log(1742279/12925, -6)", "log(158389/1175,-6)");
-  assert_parsed_expression_simplify_to("ln(R(2))", "ln(2)/2");
-  assert_parsed_expression_simplify_to("ln(X^3)", "3");
+  assert_parsed_expression_simplify_to("ln(√(2))", "ln(2)/2");
+  assert_parsed_expression_simplify_to("ln(ℯ^3)", "3");
   assert_parsed_expression_simplify_to("log(10)", "1");
-  assert_parsed_expression_simplify_to("log(R(3),R(3))", "1");
-  assert_parsed_expression_simplify_to("log(1/R(2))", "-log(2)/2");
-  assert_parsed_expression_simplify_to("log(-I)", "log(-I)");
-  assert_parsed_expression_simplify_to("ln(X^(IP/7))", "P/7*I");
+  assert_parsed_expression_simplify_to("log(√(3),√(3))", "1");
+  assert_parsed_expression_simplify_to("log(1/√(2))", "-log(2)/2");
+  assert_parsed_expression_simplify_to("log(-𝐢)", "log(-𝐢)");
+  assert_parsed_expression_simplify_to("ln(ℯ^(𝐢π/7))", "π/7×𝐢");
   assert_parsed_expression_simplify_to("log(10^24)", "24");
-  assert_parsed_expression_simplify_to("log((23P)^4,23P)", "4");
-  assert_parsed_expression_simplify_to("log(10^(2+P))", "P+2");
+  assert_parsed_expression_simplify_to("log((23π)^4,23π)", "4");
+  assert_parsed_expression_simplify_to("log(10^(2+π))", "π+2");
   assert_parsed_expression_simplify_to("ln(1881676377434183981909562699940347954480361860897069)", "ln(1881676377434183981909562699940347954480361860897069)");
-  /* log(1002101470343) does no reduce to 3*log(10007) because it involves
+  /* log(1002101470343) does no reduce to 3×log(10007) because it involves
    * prime factors above k_biggestPrimeFactor */
   assert_parsed_expression_simplify_to("log(1002101470343)", "log(1002101470343)");
   assert_parsed_expression_simplify_to("log(64,2)", "6");
   assert_parsed_expression_simplify_to("log(2,64)", "log(2,64)");
-  assert_parsed_expression_simplify_to("log(1476225,5)", "10*log(3,5)+2");
+  assert_parsed_expression_simplify_to("log(1476225,5)", "10×log(3,5)+2");
 
   assert_parsed_expression_simplify_to("log(100)", "2");
   assert_parsed_expression_simplify_to("log(1000000)", "6");
-  assert_parsed_expression_simplify_to("log(70992768,14)", "log(11,14)+log(3,14)+2*log(2,14)+5");
+  assert_parsed_expression_simplify_to("log(70992768,14)", "log(11,14)+log(3,14)+2×log(2,14)+5");
   assert_parsed_expression_simplify_to("log(1/6991712,14)", "-log(13,14)-5");
-  assert_parsed_expression_simplify_to("log(4,10)", "2*log(2)");
+  assert_parsed_expression_simplify_to("log(4,10)", "2×log(2)");
 }
diff --git a/poincare/test/multiplication.cpp b/poincare/test/multiplication.cpp
index 41d4fd816..cb6acc0ff 100644
--- a/poincare/test/multiplication.cpp
+++ b/poincare/test/multiplication.cpp
@@ -6,69 +6,69 @@
 using namespace Poincare;
 
 QUIZ_CASE(poincare_multiplication_evaluate) {
-  assert_parsed_expression_evaluates_to<float>("1*2", "2");
-  assert_parsed_expression_evaluates_to<double>("(3+I)*(4+I)", "11+7*I");
+  assert_parsed_expression_evaluates_to<float>("1×2", "2");
+  assert_parsed_expression_evaluates_to<double>("(3+𝐢)×(4+𝐢)", "11+7×𝐢");
 
 #if MATRICES_ARE_DEFINED
-  assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]*2", "[[2,4][6,8][10,12]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]*(3+I)", "[[3+I,5+5*I][9+3*I,12+4*I][15+5*I,18+6*I]]");
-  assert_parsed_expression_evaluates_to<float>("2*[[1,2][3,4][5,6]]", "[[2,4][6,8][10,12]]");
-  assert_parsed_expression_evaluates_to<double>("(3+I)*[[1,2+I][3,4][5,6]]", "[[3+I,5+5*I][9+3*I,12+4*I][15+5*I,18+6*I]]");
-  assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]*[[1,2,3,4][5,6,7,8]]", "[[11,14,17,20][23,30,37,44][35,46,57,68]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]*[[1,2+I,3,4][5,6+I,7,8]]", "[[11+5*I,13+9*I,17+7*I,20+8*I][23,30+7*I,37,44][35,46+11*I,57,68]]");
+  assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]×2", "[[2,4][6,8][10,12]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]×(3+𝐢)", "[[3+𝐢,5+5×𝐢][9+3×𝐢,12+4×𝐢][15+5×𝐢,18+6×𝐢]]");
+  assert_parsed_expression_evaluates_to<float>("2×[[1,2][3,4][5,6]]", "[[2,4][6,8][10,12]]");
+  assert_parsed_expression_evaluates_to<double>("(3+𝐢)×[[1,2+𝐢][3,4][5,6]]", "[[3+𝐢,5+5×𝐢][9+3×𝐢,12+4×𝐢][15+5×𝐢,18+6×𝐢]]");
+  assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]×[[1,2,3,4][5,6,7,8]]", "[[11,14,17,20][23,30,37,44][35,46,57,68]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]×[[1,2+𝐢,3,4][5,6+𝐢,7,8]]", "[[11+5×𝐢,13+9×𝐢,17+7×𝐢,20+8×𝐢][23,30+7×𝐢,37,44][35,46+11×𝐢,57,68]]");
 #endif
 }
 
 QUIZ_CASE(poincare_multiplication_simplify) {
-  assert_parsed_expression_simplify_to("undef*x", "undef");
-  assert_parsed_expression_simplify_to("0*x+B", "B");
-  assert_parsed_expression_simplify_to("0*x*0*32*cos(3)", "0");
-  assert_parsed_expression_simplify_to("3*A^4*B^x*B^2*(A^2+2)*2*1.2", "(36*A^6*B^(x+2)+72*A^4*B^(x+2))/5");
-  assert_parsed_expression_simplify_to("A*(B+C)*(D+3)", "3*A*B+3*A*C+A*B*D+A*C*D");
+  assert_parsed_expression_simplify_to("undef×x", "undef");
+  assert_parsed_expression_simplify_to("0×x+B", "B");
+  assert_parsed_expression_simplify_to("0×x×0×32×cos(3)", "0");
+  assert_parsed_expression_simplify_to("3×A^4×B^x×B^2×(A^2+2)×2×1.2", "(36×A^6×B^(x+2)+72×A^4×B^(x+2))/5");
+  assert_parsed_expression_simplify_to("A×(B+C)×(D+3)", "3×A×B+3×A×C+A×B×D+A×C×D");
   assert_parsed_expression_simplify_to("A/B", "A/B");
-  assert_parsed_expression_simplify_to("(A*B)^2", "A^2*B^2");
-  assert_parsed_expression_simplify_to("(1/2)*A/B", "A/(2*B)");
+  assert_parsed_expression_simplify_to("(A×B)^2", "A^2×B^2");
+  assert_parsed_expression_simplify_to("(1/2)×A/B", "A/(2×B)");
   assert_parsed_expression_simplify_to("1+2+3+4+5+6", "21");
   assert_parsed_expression_simplify_to("1-2+3-4+5-6", "-3");
-  assert_parsed_expression_simplify_to("987654321123456789*998877665544332211", "986545842648570754445552922919330479");
+  assert_parsed_expression_simplify_to("987654321123456789×998877665544332211", "986545842648570754445552922919330479");
   assert_parsed_expression_simplify_to("2/3", "2/3");
   assert_parsed_expression_simplify_to("9/17+5/4", "121/68");
-  assert_parsed_expression_simplify_to("1/2*3/4", "3/8");
-  assert_parsed_expression_simplify_to("0*2/3", "0");
+  assert_parsed_expression_simplify_to("1/2×3/4", "3/8");
+  assert_parsed_expression_simplify_to("0×2/3", "0");
   assert_parsed_expression_simplify_to("1+(1/(1+1/(1+1/(1+1))))", "8/5");
   assert_parsed_expression_simplify_to("1+2/(3+4/(5+6/(7+8)))", "155/101");
-  assert_parsed_expression_simplify_to("3/4*16/12", "1");
-  assert_parsed_expression_simplify_to("3/4*(8+8)/12", "1");
+  assert_parsed_expression_simplify_to("3/4×16/12", "1");
+  assert_parsed_expression_simplify_to("3/4×(8+8)/12", "1");
   assert_parsed_expression_simplify_to("916791/794976477", "305597/264992159");
   assert_parsed_expression_simplify_to("321654987123456789/112233445566778899", "3249040273974311/1133671167341201");
   assert_parsed_expression_simplify_to("0.1+0.2", "3/10");
   assert_parsed_expression_simplify_to("2^3", "8");
-  assert_parsed_expression_simplify_to("(-1)*(-1)", "1");
+  assert_parsed_expression_simplify_to("(-1)×(-1)", "1");
   assert_parsed_expression_simplify_to("(-2)^2", "4");
   assert_parsed_expression_simplify_to("(-3)^3", "-27");
   assert_parsed_expression_simplify_to("(1/2)^-1", "2");
-  assert_parsed_expression_simplify_to("R(2)*R(3)", "R(6)");
-  assert_parsed_expression_simplify_to("2*2^P", "2*2^P");
-  assert_parsed_expression_simplify_to("A^3*B*A^(-3)", "B");
-  assert_parsed_expression_simplify_to("A^3*A^(-3)", "1");
-  assert_parsed_expression_simplify_to("2^P*(1/2)^P", "1");
-  assert_parsed_expression_simplify_to("A^3*A^(-3)", "1");
-  assert_parsed_expression_simplify_to("(x+1)*(x+2)", "x^2+3*x+2");
-  assert_parsed_expression_simplify_to("(x+1)*(x-1)", "x^2-1");
-  assert_parsed_expression_simplify_to("11P/(22P+11P)", "1/3");
-  assert_parsed_expression_simplify_to("11/(22P+11P)", "1/(3*P)");
-  assert_parsed_expression_simplify_to("-11/(22P+11P)", "-1/(3*P)");
-  assert_parsed_expression_simplify_to("A^2*B*A^(-2)*B^(-2)", "1/B");
-  assert_parsed_expression_simplify_to("A^(-1)*B^(-1)", "1/(A*B)");
-  assert_parsed_expression_simplify_to("x+x", "2*x");
-  assert_parsed_expression_simplify_to("2*x+x", "3*x");
-  assert_parsed_expression_simplify_to("x*2+x", "3*x");
-  assert_parsed_expression_simplify_to("2*x+2*x", "4*x");
-  assert_parsed_expression_simplify_to("x*2+2*n", "2*n+2*x");
-  assert_parsed_expression_simplify_to("x+x+n+n", "2*n+2*x");
+  assert_parsed_expression_simplify_to("√(2)×√(3)", "√(6)");
+  assert_parsed_expression_simplify_to("2×2^π", "2×2^π");
+  assert_parsed_expression_simplify_to("A^3×B×A^(-3)", "B");
+  assert_parsed_expression_simplify_to("A^3×A^(-3)", "1");
+  assert_parsed_expression_simplify_to("2^π×(1/2)^π", "1");
+  assert_parsed_expression_simplify_to("A^3×A^(-3)", "1");
+  assert_parsed_expression_simplify_to("(x+1)×(x+2)", "x^2+3×x+2");
+  assert_parsed_expression_simplify_to("(x+1)×(x-1)", "x^2-1");
+  assert_parsed_expression_simplify_to("11π/(22π+11π)", "1/3");
+  assert_parsed_expression_simplify_to("11/(22π+11π)", "1/(3×π)");
+  assert_parsed_expression_simplify_to("-11/(22π+11π)", "-1/(3×π)");
+  assert_parsed_expression_simplify_to("A^2×B×A^(-2)×B^(-2)", "1/B");
+  assert_parsed_expression_simplify_to("A^(-1)×B^(-1)", "1/(A×B)");
+  assert_parsed_expression_simplify_to("x+x", "2×x");
+  assert_parsed_expression_simplify_to("2×x+x", "3×x");
+  assert_parsed_expression_simplify_to("x×2+x", "3×x");
+  assert_parsed_expression_simplify_to("2×x+2×x", "4×x");
+  assert_parsed_expression_simplify_to("x×2+2×n", "2×n+2×x");
+  assert_parsed_expression_simplify_to("x+x+n+n", "2×n+2×x");
   assert_parsed_expression_simplify_to("x-x-n+n", "0");
   assert_parsed_expression_simplify_to("x+n-x-n", "0");
   assert_parsed_expression_simplify_to("x-x", "0");
-  assert_parsed_expression_simplify_to("P*3^(1/2)*(5P)^(1/2)*(4/5)^(1/2)", "2*R(3)*P^(3/2)");
-  assert_parsed_expression_simplify_to("12^(1/4)*(P/6)*(12*P)^(1/4)", "(R(3)*P^(5/4))/3");
+  assert_parsed_expression_simplify_to("π×3^(1/2)×(5π)^(1/2)×(4/5)^(1/2)", "2×√(3)×π^(3/2)");
+  assert_parsed_expression_simplify_to("12^(1/4)×(π/6)×(12×π)^(1/4)", "(√(3)×π^(5/4))/3");
 }
diff --git a/poincare/test/number.cpp b/poincare/test/number.cpp
index 078ced52d..8bb30e4b2 100644
--- a/poincare/test/number.cpp
+++ b/poincare/test/number.cpp
@@ -29,10 +29,10 @@ QUIZ_CASE(poincare_number_parser) {
   assert_parsed_expression_is("12.34567", Decimal::Builder(Integer("1234567"), 1));
 
   // Infinity
-  assert_parsed_expression_is("23E1000", Infinity::Builder(false));
-  assert_parsed_expression_is("2.3E1000", Decimal::Builder(Integer(23), 1000));
+  assert_parsed_expression_is("23ᴇ1000", Infinity::Builder(false));
+  assert_parsed_expression_is("2.3ᴇ1000", Decimal::Builder(Integer(23), 1000));
 
   // Zero
-  assert_parsed_expression_is("0.23E-1000", Decimal::Builder(Integer(0), 0));
-  assert_parsed_expression_is("0.23E-999", Decimal::Builder(Integer(23), -1000));
+  assert_parsed_expression_is("0.23ᴇ-1000", Decimal::Builder(Integer(0), 0));
+  assert_parsed_expression_is("0.23ᴇ-999", Decimal::Builder(Integer(23), -1000));
 }
diff --git a/poincare/test/parser.cpp b/poincare/test/parser.cpp
index 762100eae..c7d7b9f08 100644
--- a/poincare/test/parser.cpp
+++ b/poincare/test/parser.cpp
@@ -50,23 +50,23 @@ QUIZ_CASE(poincare_parser_tokenize_numbers) {
   assert_tokenizes_as_number("123");
   assert_tokenizes_as_number("1.3");
   assert_tokenizes_as_number(".3");
-  assert_tokenizes_as_number("1.3E3");
-  assert_tokenizes_as_number("12.34E56");
-  assert_tokenizes_as_number(".3E-32");
+  assert_tokenizes_as_number("1.3ᴇ3");
+  assert_tokenizes_as_number("12.34ᴇ56");
+  assert_tokenizes_as_number(".3ᴇ-32");
   assert_tokenizes_as_number("12.");
   assert_tokenizes_as_number(".999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999");
   assert_tokenizes_as_number("0.");
-  assert_tokenizes_as_number("1.E-4");
-  assert_tokenizes_as_number("1.E9999");
+  assert_tokenizes_as_number("1.ᴇ-4");
+  assert_tokenizes_as_number("1.ᴇ9999");
 
-  assert_tokenizes_as_undefined_token("1E");
+  assert_tokenizes_as_undefined_token("1ᴇ");
   assert_tokenizes_as_undefined_token("1..");
   assert_tokenizes_as_undefined_token("..");
-  assert_tokenizes_as_undefined_token("1.EE");
-  assert_tokenizes_as_undefined_token("1.E");
-  assert_tokenizes_as_undefined_token("1E--4");
-  assert_tokenizes_as_undefined_token("1.EE4");
-  assert_tokenizes_as_undefined_token("1E2E4");
+  assert_tokenizes_as_undefined_token("1.ᴇᴇ");
+  assert_tokenizes_as_undefined_token("1.ᴇ");
+  assert_tokenizes_as_undefined_token("1ᴇ--4");
+  assert_tokenizes_as_undefined_token("1.ᴇᴇ4");
+  assert_tokenizes_as_undefined_token("1ᴇ2ᴇ4");
 }
 
 QUIZ_CASE(poincare_parser_parse_numbers) {
@@ -79,14 +79,14 @@ QUIZ_CASE(poincare_parser_parse_numbers) {
   assert_parsed_expression_is("0.1", Decimal::Builder(0.1));
   assert_parsed_expression_is("1.", Rational::Builder(1));
   assert_parsed_expression_is(".1", Decimal::Builder(0.1));
-  assert_parsed_expression_is("0E2", Decimal::Builder(0.0));
-  assert_parsed_expression_is("0.1E2", Decimal::Builder(10.0));
-  assert_parsed_expression_is("1.E2", Decimal::Builder(100.0));
-  assert_parsed_expression_is(".1E2", Decimal::Builder(10.0));
-  assert_parsed_expression_is("0E-2", Decimal::Builder(0.0));
-  assert_parsed_expression_is("0.1E-2", Decimal::Builder(0.001));
-  assert_parsed_expression_is("1.E-2", Decimal::Builder(0.01));
-  assert_parsed_expression_is(".1E-2", Decimal::Builder(0.001));
+  assert_parsed_expression_is("0ᴇ2", Decimal::Builder(0.0));
+  assert_parsed_expression_is("0.1ᴇ2", Decimal::Builder(10.0));
+  assert_parsed_expression_is("1.ᴇ2", Decimal::Builder(100.0));
+  assert_parsed_expression_is(".1ᴇ2", Decimal::Builder(10.0));
+  assert_parsed_expression_is("0ᴇ-2", Decimal::Builder(0.0));
+  assert_parsed_expression_is("0.1ᴇ-2", Decimal::Builder(0.001));
+  assert_parsed_expression_is("1.ᴇ-2", Decimal::Builder(0.01));
+  assert_parsed_expression_is(".1ᴇ-2", Decimal::Builder(0.001));
 }
 
 QUIZ_CASE(poincare_parser_memory_exhaustion) {
@@ -122,16 +122,16 @@ QUIZ_CASE(poincare_parser_parse) {
   assert_parsed_expression_is("(1+2)", Parenthesis::Builder(Addition::Builder(Rational::Builder(1),Rational::Builder(2))));
   assert_parsed_expression_is("1+2+3", Addition::Builder(Addition::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
   assert_parsed_expression_is("1+2+(3+4)", Addition::Builder(Addition::Builder(Rational::Builder(1),Rational::Builder(2)),Parenthesis::Builder(Addition::Builder(Rational::Builder(3),Rational::Builder(4)))));
-  assert_parsed_expression_is("1*2", Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)));
-  assert_parsed_expression_is("1*2*3", Multiplication::Builder(Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
-  assert_parsed_expression_is("1+2*3", Addition::Builder(Rational::Builder(1), Multiplication::Builder(Rational::Builder(2), Rational::Builder(3))));
+  assert_parsed_expression_is("1×2", Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)));
+  assert_parsed_expression_is("1×2×3", Multiplication::Builder(Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
+  assert_parsed_expression_is("1+2×3", Addition::Builder(Rational::Builder(1), Multiplication::Builder(Rational::Builder(2), Rational::Builder(3))));
   assert_parsed_expression_is("1/2", Division::Builder(Rational::Builder(1),Rational::Builder(2)));
   assert_parsed_expression_is("(1/2)", Parenthesis::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2))));
   assert_parsed_expression_is("1/2/3", Division::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
-  assert_parsed_expression_is("1/2*3", Multiplication::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
-  assert_parsed_expression_is("(1/2*3)", Parenthesis::Builder(Multiplication::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3))));
-  assert_parsed_expression_is("1*2/3", Multiplication::Builder(Rational::Builder(1),Division::Builder(Rational::Builder(2),Rational::Builder(3))));
-  assert_parsed_expression_is("(1*2/3)", Parenthesis::Builder(Multiplication::Builder(Rational::Builder(1),Division::Builder(Rational::Builder(2),Rational::Builder(3)))));
+  assert_parsed_expression_is("1/2×3", Multiplication::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
+  assert_parsed_expression_is("(1/2×3)", Parenthesis::Builder(Multiplication::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3))));
+  assert_parsed_expression_is("1×2/3", Multiplication::Builder(Rational::Builder(1),Division::Builder(Rational::Builder(2),Rational::Builder(3))));
+  assert_parsed_expression_is("(1×2/3)", Parenthesis::Builder(Multiplication::Builder(Rational::Builder(1),Division::Builder(Rational::Builder(2),Rational::Builder(3)))));
   assert_parsed_expression_is("(1/2/3)", Parenthesis::Builder(Division::Builder(Division::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3))));
   assert_parsed_expression_is("1^2", Power::Builder(Rational::Builder(1),Rational::Builder(2)));
   assert_parsed_expression_is("1^2^3", Power::Builder(Rational::Builder(1),Power::Builder(Rational::Builder(2),Rational::Builder(3))));
@@ -147,23 +147,23 @@ QUIZ_CASE(poincare_parser_parse) {
   assert_parsed_expression_is("1+-2", Addition::Builder(Rational::Builder(1),Opposite::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("--1", Opposite::Builder((Expression)Opposite::Builder(Rational::Builder(1))));
   assert_parsed_expression_is("(1+2)-3", Subtraction::Builder(Parenthesis::Builder(Addition::Builder(Rational::Builder(1),Rational::Builder(2))),Rational::Builder(3)));
-  assert_parsed_expression_is("(2*-3)", Parenthesis::Builder(Multiplication::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(3)))));
+  assert_parsed_expression_is("(2×-3)", Parenthesis::Builder(Multiplication::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(3)))));
   assert_parsed_expression_is("1^(2)-3", Subtraction::Builder(Power::Builder(Rational::Builder(1),Parenthesis::Builder(Rational::Builder(2))),Rational::Builder(3)));
   assert_parsed_expression_is("1^2-3", Subtraction::Builder(Power::Builder(Rational::Builder(1),Rational::Builder(2)),Rational::Builder(3)));
   assert_parsed_expression_is("2^-3", Power::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(3))));
   assert_parsed_expression_is("2--2+-1", Addition::Builder(Subtraction::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(2))),Opposite::Builder(Rational::Builder(1))));
-  assert_parsed_expression_is("2--2*-1", Subtraction::Builder(Rational::Builder(2),Opposite::Builder(Multiplication::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(1))))));
+  assert_parsed_expression_is("2--2×-1", Subtraction::Builder(Rational::Builder(2),Opposite::Builder(Multiplication::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(1))))));
   assert_parsed_expression_is("-1^2", Opposite::Builder(Power::Builder(Rational::Builder(1),Rational::Builder(2))));
   assert_parsed_expression_is("2/-3/-4", Division::Builder(Division::Builder(Rational::Builder(2),Opposite::Builder(Rational::Builder(3))),Opposite::Builder(Rational::Builder(4))));
-  assert_parsed_expression_is("1*2-3*4", Subtraction::Builder(Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)),Multiplication::Builder(Rational::Builder(3),Rational::Builder(4))));
-  assert_parsed_expression_is("-1*2", Opposite::Builder(Multiplication::Builder(Rational::Builder(1), Rational::Builder(2))));
+  assert_parsed_expression_is("1×2-3×4", Subtraction::Builder(Multiplication::Builder(Rational::Builder(1),Rational::Builder(2)),Multiplication::Builder(Rational::Builder(3),Rational::Builder(4))));
+  assert_parsed_expression_is("-1×2", Opposite::Builder(Multiplication::Builder(Rational::Builder(1), Rational::Builder(2))));
   assert_parsed_expression_is("1!", Factorial::Builder(Rational::Builder(1)));
   assert_parsed_expression_is("1+2!", Addition::Builder(Rational::Builder(1),Factorial::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1!+2", Addition::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
   assert_parsed_expression_is("1!+2!", Addition::Builder(Factorial::Builder(Rational::Builder(1)),Factorial::Builder(Rational::Builder(2))));
-  assert_parsed_expression_is("1*2!", Multiplication::Builder(Rational::Builder(1),Factorial::Builder(Rational::Builder(2))));
-  assert_parsed_expression_is("1!*2", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
-  assert_parsed_expression_is("1!*2!", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Factorial::Builder(Rational::Builder(2))));
+  assert_parsed_expression_is("1×2!", Multiplication::Builder(Rational::Builder(1),Factorial::Builder(Rational::Builder(2))));
+  assert_parsed_expression_is("1!×2", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
+  assert_parsed_expression_is("1!×2!", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Factorial::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1-2!", Subtraction::Builder(Rational::Builder(1),Factorial::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1!-2", Subtraction::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
   assert_parsed_expression_is("1!-2!", Subtraction::Builder(Factorial::Builder(Rational::Builder(1)),Factorial::Builder(Rational::Builder(2))));
@@ -182,14 +182,14 @@ QUIZ_CASE(poincare_parser_parse) {
   assert_raises_parsing_error("1)");
   assert_raises_parsing_error("1++2");
   assert_raises_parsing_error("1//2");
-  assert_raises_parsing_error("*1");
+  assert_raises_parsing_error("×1");
   assert_raises_parsing_error("1^^2");
   assert_raises_parsing_error("^1");
   assert_raises_parsing_error("t0000000");
   assert_raises_parsing_error("[[t0000000[");
-  assert_raises_parsing_error("0>x=0");
-  assert_raises_parsing_error("0=0>x");
-  assert_raises_parsing_error("1E2E3");
+  assert_raises_parsing_error("0→x=0");
+  assert_raises_parsing_error("0=0→x");
+  assert_raises_parsing_error("1ᴇ2ᴇ3");
 }
 
 Matrix BuildMatrix(int rows, int columns, Expression entries[]) {
@@ -257,9 +257,9 @@ QUIZ_CASE(poincare_parser_symbols_and_functions) {
 
   // Reserved symbols
   assert_parsed_expression_is("ans", Symbol::Builder("ans", 3));
-  assert_parsed_expression_is("I", Constant::Builder(KDCodePointMathematicalBoldSmallI));
-  assert_parsed_expression_is("P", Constant::Builder(KDCodePointGreekSmallLetterPi));
-  assert_parsed_expression_is("X", Constant::Builder(KDCodePointScriptSmallE));
+  assert_parsed_expression_is("𝐢", Constant::Builder(KDCodePointMathematicalBoldSmallI));
+  assert_parsed_expression_is("π", Constant::Builder(KDCodePointGreekSmallLetterPi));
+  assert_parsed_expression_is("ℯ", Constant::Builder(KDCodePointScriptSmallE));
   assert_parsed_expression_is(Infinity::Name(), Infinity::Builder(false));
   assert_parsed_expression_is(Undefined::Name(), Undefined::Builder());
 
@@ -318,43 +318,43 @@ QUIZ_CASE(poincare_parser_symbols_and_functions) {
   assert_parsed_expression_is("tanh(1)", HyperbolicTangent::Builder(Rational::Builder(1)));
   assert_parsed_expression_is("trace(1)", MatrixTrace::Builder(Rational::Builder(1)));
   assert_parsed_expression_is("transpose(1)", MatrixTranspose::Builder(Rational::Builder(1)));
-  assert_parsed_expression_is("\x91(1)", SquareRoot::Builder(Rational::Builder(1)));
+  assert_parsed_expression_is("√(1)", SquareRoot::Builder(Rational::Builder(1)));
   assert_raises_parsing_error("cos(1,2)");
   assert_raises_parsing_error("log(1,2,3)");
 }
 
 QUIZ_CASE(poincare_parser_parse_store) {
-  assert_parsed_expression_is("1>a", Store::Builder(Rational::Builder(1),Symbol::Builder("a",1)));
-  assert_parsed_expression_is("1>e", Store::Builder(Rational::Builder(1),Symbol::Builder("e",1)));
-  assert_parsed_expression_is("1>f(x)", Store::Builder(Rational::Builder(1),Function::Builder("f",1,Symbol::Builder("x",1))));
-  assert_parsed_expression_is("x>f(x)", Store::Builder(Symbol::Builder("x",1),Function::Builder("f",1,Symbol::Builder("x",1))));
-  assert_parsed_expression_is("n>f(x)", Store::Builder(Symbol::Builder("n",1),Function::Builder("f",1,Symbol::Builder("x",1))));
+  assert_parsed_expression_is("1→a", Store::Builder(Rational::Builder(1),Symbol::Builder("a",1)));
+  assert_parsed_expression_is("1→e", Store::Builder(Rational::Builder(1),Symbol::Builder("e",1)));
+  assert_parsed_expression_is("1→f(x)", Store::Builder(Rational::Builder(1),Function::Builder("f",1,Symbol::Builder("x",1))));
+  assert_parsed_expression_is("x→f(x)", Store::Builder(Symbol::Builder("x",1),Function::Builder("f",1,Symbol::Builder("x",1))));
+  assert_parsed_expression_is("n→f(x)", Store::Builder(Symbol::Builder("n",1),Function::Builder("f",1,Symbol::Builder("x",1))));
   Expression m0[] = {Symbol::Builder('x')};
-  assert_parsed_expression_is("[[x]]>f(x)", Store::Builder(BuildMatrix(1,1,m0), Function::Builder("f", 1, Symbol::Builder('x'))));
-  assert_raises_parsing_error("a>b>c");
-  assert_raises_parsing_error("1>2");
-  assert_raises_parsing_error("1>");
-  assert_raises_parsing_error(">2");
-  assert_raises_parsing_error("(1>a)");
-  assert_raises_parsing_error("1>u(n)");
-  assert_raises_parsing_error("1>u(n+1)");
-  assert_raises_parsing_error("1>v(n)");
-  assert_raises_parsing_error("1>v(n+1)");
-  assert_raises_parsing_error("1>u_{n}");
-  assert_raises_parsing_error("1>u_{n+1}");
-  assert_raises_parsing_error("1>v_{n}");
-  assert_raises_parsing_error("1>v_{n+1}");
-  assert_raises_parsing_error("1>inf");
-  assert_raises_parsing_error("1>undef");
-  assert_raises_parsing_error("1>P");
-  assert_raises_parsing_error("1>I");
-  assert_raises_parsing_error("1>X");
-  assert_raises_parsing_error("1>\1"); // UnknownX
-  assert_raises_parsing_error("1>acos");
-  assert_raises_parsing_error("1>f(2)");
-  assert_raises_parsing_error("1>f(f)");
-  assert_raises_parsing_error("1>ans");
-  assert_raises_parsing_error("ans>ans");
+  assert_parsed_expression_is("[[x]]→f(x)", Store::Builder(BuildMatrix(1,1,m0), Function::Builder("f", 1, Symbol::Builder('x'))));
+  assert_raises_parsing_error("a→b→c");
+  assert_raises_parsing_error("1→2");
+  assert_raises_parsing_error("1→");
+  assert_raises_parsing_error("→2");
+  assert_raises_parsing_error("(1→a)");
+  assert_raises_parsing_error("1→u(n)");
+  assert_raises_parsing_error("1→u(n+1)");
+  assert_raises_parsing_error("1→v(n)");
+  assert_raises_parsing_error("1→v(n+1)");
+  assert_raises_parsing_error("1→u_{n}");
+  assert_raises_parsing_error("1→u_{n+1}");
+  assert_raises_parsing_error("1→v_{n}");
+  assert_raises_parsing_error("1→v_{n+1}");
+  assert_raises_parsing_error("1→inf");
+  assert_raises_parsing_error("1→undef");
+  assert_raises_parsing_error("1→π");
+  assert_raises_parsing_error("1→𝐢");
+  assert_raises_parsing_error("1→ℯ");
+  assert_raises_parsing_error("1→\1"); // UnknownX
+  assert_raises_parsing_error("1→acos");
+  assert_raises_parsing_error("1→f(2)");
+  assert_raises_parsing_error("1→f(f)");
+  assert_raises_parsing_error("1→ans");
+  assert_raises_parsing_error("ans→ans");
 }
 
 QUIZ_CASE(poincare_parser_implicit_multiplication) {
@@ -364,10 +364,10 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("1ans", Multiplication::Builder(Rational::Builder(1),Symbol::Builder("ans", 3)));
   assert_parsed_expression_is("x1", Symbol::Builder("x1", 2));
   assert_parsed_expression_is("1x+2", Addition::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
-  assert_parsed_expression_is("1P", Multiplication::Builder(Rational::Builder(1),Constant::Builder(KDCodePointGreekSmallLetterPi)));
+  assert_parsed_expression_is("1π", Multiplication::Builder(Rational::Builder(1),Constant::Builder(KDCodePointGreekSmallLetterPi)));
   assert_parsed_expression_is("1x-2", Subtraction::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
   assert_parsed_expression_is("-1x", Opposite::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
-  assert_parsed_expression_is("2*1x", Multiplication::Builder(Rational::Builder(2),Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
+  assert_parsed_expression_is("2×1x", Multiplication::Builder(Rational::Builder(2),Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
   assert_parsed_expression_is("2^1x", Multiplication::Builder(Power::Builder(Rational::Builder(2),Rational::Builder(1)),Symbol::Builder("x", 1)));
   assert_parsed_expression_is("1x^2", Multiplication::Builder(Rational::Builder(1),Power::Builder(Symbol::Builder("x", 1),Rational::Builder(2))));
   assert_parsed_expression_is("2/1x", Division::Builder(Rational::Builder(2),Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
@@ -377,7 +377,7 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("sin(1)2", Multiplication::Builder(Sine::Builder(Rational::Builder(1)),Rational::Builder(2)));
   assert_parsed_expression_is("1cos(2)", Multiplication::Builder(Rational::Builder(1),Cosine::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1!2", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
-  assert_parsed_expression_is("2X^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
+  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   Expression m1[] = {Rational::Builder(1)}; Matrix M1 = BuildMatrix(1,1,m1);
   Expression m2[] = {Rational::Builder(2)}; Matrix M2 = BuildMatrix(1,1,m2);
   assert_parsed_expression_is("[[1]][[2]]", Multiplication::Builder(M1,M2));
@@ -388,29 +388,29 @@ QUIZ_CASE(poincare_parser_expression_evaluation) {
   assert_parsed_expression_evaluates_to<float>("-0.1", "-0.1");
   assert_parsed_expression_evaluates_to<float>("-1.", "-1");
   assert_parsed_expression_evaluates_to<float>("-.1", "-0.1");
-  assert_parsed_expression_evaluates_to<float>("-0E2", "0");
-  assert_parsed_expression_evaluates_to<float>("-0.1E2", "-10");
-  assert_parsed_expression_evaluates_to<float>("-1.E2", "-100");
-  assert_parsed_expression_evaluates_to<float>("-.1E2", "-10");
-  assert_parsed_expression_evaluates_to<float>("-0E-2", "0");
-  assert_parsed_expression_evaluates_to<float>("-0.1E-2", "-0.001");
-  assert_parsed_expression_evaluates_to<float>("-1.E-2", "-0.01");
-  assert_parsed_expression_evaluates_to<float>("-.1E-2", "-0.001");
+  assert_parsed_expression_evaluates_to<float>("-0ᴇ2", "0");
+  assert_parsed_expression_evaluates_to<float>("-0.1ᴇ2", "-10");
+  assert_parsed_expression_evaluates_to<float>("-1.ᴇ2", "-100");
+  assert_parsed_expression_evaluates_to<float>("-.1ᴇ2", "-10");
+  assert_parsed_expression_evaluates_to<float>("-0ᴇ-2", "0");
+  assert_parsed_expression_evaluates_to<float>("-0.1ᴇ-2", "-0.001");
+  assert_parsed_expression_evaluates_to<float>("-1.ᴇ-2", "-0.01");
+  assert_parsed_expression_evaluates_to<float>("-.1ᴇ-2", "-0.001");
 
   assert_parsed_expression_evaluates_to<float>("-2-3", "-5");
-  assert_parsed_expression_evaluates_to<float>("1.2*X^(1)", "3.261938");
-  assert_parsed_expression_evaluates_to<float>("2X^(3)", "40.1711", System, Radian, Cartesian, 6); // WARNING: the 7th significant digit is wrong on blackbos simulator
-  assert_parsed_expression_evaluates_to<float>("X^2*X^(1)", "20.0855", System, Radian, Cartesian, 6); // WARNING: the 7th significant digit is wrong on simulator
-  assert_parsed_expression_evaluates_to<double>("X^2*X^(1)", "20.085536923188");
-  assert_parsed_expression_evaluates_to<double>("2*3^4+2", "164");
-  assert_parsed_expression_evaluates_to<float>("-2*3^4+2", "-160");
-  assert_parsed_expression_evaluates_to<double>("-sin(3)*2-3", "-3.2822400161197", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("1.2×ℯ^(1)", "3.261938");
+  assert_parsed_expression_evaluates_to<float>("2ℯ^(3)", "40.1711", System, Radian, Cartesian, 6); // WARNING: the 7th significant digit is wrong on blackbos simulator
+  assert_parsed_expression_evaluates_to<float>("ℯ^2×ℯ^(1)", "20.0855", System, Radian, Cartesian, 6); // WARNING: the 7th significant digit is wrong on simulator
+  assert_parsed_expression_evaluates_to<double>("ℯ^2×ℯ^(1)", "20.085536923188");
+  assert_parsed_expression_evaluates_to<double>("2×3^4+2", "164");
+  assert_parsed_expression_evaluates_to<float>("-2×3^4+2", "-160");
+  assert_parsed_expression_evaluates_to<double>("-sin(3)×2-3", "-3.2822400161197", System, Radian);
   assert_parsed_expression_evaluates_to<float>("-.003", "-0.003");
-  assert_parsed_expression_evaluates_to<double>(".02E2", "2");
+  assert_parsed_expression_evaluates_to<double>(".02ᴇ2", "2");
   assert_parsed_expression_evaluates_to<float>("5-2/3", "4.333333");
   assert_parsed_expression_evaluates_to<double>("2/3-5", "-4.3333333333333");
   assert_parsed_expression_evaluates_to<float>("-2/3-5", "-5.666667");
   assert_parsed_expression_evaluates_to<double>("sin(3)2(4+2)", "1.6934400967184", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("4/2*(2+3)", "10");
-  assert_parsed_expression_evaluates_to<double>("4/2*(2+3)", "10");
+  assert_parsed_expression_evaluates_to<float>("4/2×(2+3)", "10");
+  assert_parsed_expression_evaluates_to<double>("4/2×(2+3)", "10");
 }
diff --git a/poincare/test/power.cpp b/poincare/test/power.cpp
index 99f86e06c..bf0a91b56 100644
--- a/poincare/test/power.cpp
+++ b/poincare/test/power.cpp
@@ -8,41 +8,43 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_power_evaluate) {
   assert_parsed_expression_evaluates_to<float>("2^3", "8");
-  assert_parsed_expression_evaluates_to<double>("(3+I)^4", "28+96*I");
-  assert_parsed_expression_evaluates_to<float>("4^(3+I)", "11.74125+62.91378*I");
-  assert_parsed_expression_evaluates_to<double>("(3+I)^(3+I)", "-11.898191759852+19.592921596609*I");
+  assert_parsed_expression_evaluates_to<double>("(3+𝐢)^4", "28+96×𝐢");
+  assert_parsed_expression_evaluates_to<float>("4^(3+𝐢)", "11.74125+62.91378×𝐢");
+  assert_parsed_expression_evaluates_to<double>("(3+𝐢)^(3+𝐢)", "-11.898191759852+19.592921596609×𝐢");
 
   assert_parsed_expression_evaluates_to<double>("0^0", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("0^2", "0");
   assert_parsed_expression_evaluates_to<double>("0^(-2)", Undefined::Name());
-  assert_parsed_expression_evaluates_to<double>("(-2)^4.2", "14.8690638497+10.8030072384*I", System, Radian, Cartesian, 12);
+
+  assert_parsed_expression_evaluates_to<double>("(-2)^4.2", "14.8690638497+10.8030072384×𝐢", System, Radian, Cartesian, 12);
   assert_parsed_expression_evaluates_to<double>("(-0.1)^4", "0.0001", System, Radian, Cartesian, 12);
+
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4]]^(-3)", "[[-14.75,6.75][10.125,-4.625]]", System, Degree, Cartesian, 6);
   assert_parsed_expression_evaluates_to<double>("[[1,2][3,4]]^3", "[[37,54][81,118]]");
 #endif
   assert_parsed_expression_evaluates_to<float>("0^2", "0");
-  assert_parsed_expression_evaluates_to<double>("I^I", "2.0787957635076E-1");
+  assert_parsed_expression_evaluates_to<double>("𝐢^𝐢", "2.0787957635076ᴇ-1");
   assert_parsed_expression_evaluates_to<float>("1.0066666666667^60", "1.48985", System, Radian, Cartesian, 6);
   assert_parsed_expression_evaluates_to<double>("1.0066666666667^60", "1.4898457083046");
-  assert_parsed_expression_evaluates_to<float>("X^(I*P)", "-1");
-  assert_parsed_expression_evaluates_to<double>("X^(I*P)", "-1");
-  assert_parsed_expression_evaluates_to<float>("X^(I*P+2)", "-7.38906", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<double>("X^(I*P+2)", "-7.3890560989307");
-  assert_parsed_expression_evaluates_to<float>("(-1)^(1/3)", "0.5+0.8660254*I");
-  assert_parsed_expression_evaluates_to<double>("(-1)^(1/3)", "0.5+8.6602540378444E-1*I");
-  assert_parsed_expression_evaluates_to<float>("X^(I*P/3)", "0.5+0.8660254*I");
-  assert_parsed_expression_evaluates_to<double>("X^(I*P/3)", "0.5+8.6602540378444E-1*I");
-  assert_parsed_expression_evaluates_to<float>("I^(2/3)", "0.5+0.8660254*I");
-  assert_parsed_expression_evaluates_to<double>("I^(2/3)", "0.5+8.6602540378444E-1*I");
+  assert_parsed_expression_evaluates_to<float>("ℯ^(𝐢×π)", "-1");
+  assert_parsed_expression_evaluates_to<double>("ℯ^(𝐢×π)", "-1");
+  assert_parsed_expression_evaluates_to<float>("ℯ^(𝐢×π+2)", "-7.38906", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<double>("ℯ^(𝐢×π+2)", "-7.3890560989307");
+  assert_parsed_expression_evaluates_to<float>("(-1)^(1/3)", "0.5+0.8660254×𝐢");
+  assert_parsed_expression_evaluates_to<double>("(-1)^(1/3)", "0.5+8.6602540378444ᴇ-1×𝐢");
+  assert_parsed_expression_evaluates_to<float>("ℯ^(𝐢×π/3)", "0.5+0.8660254×𝐢");
+  assert_parsed_expression_evaluates_to<double>("ℯ^(𝐢×π/3)", "0.5+8.6602540378444ᴇ-1×𝐢");
+  assert_parsed_expression_evaluates_to<float>("𝐢^(2/3)", "0.5+0.8660254×𝐢");
+  assert_parsed_expression_evaluates_to<double>("𝐢^(2/3)", "0.5+8.6602540378444ᴇ-1×𝐢");
 }
 
 QUIZ_CASE(poincare_power_simplify) {
   assert_parsed_expression_simplify_to("3^4", "81");
   assert_parsed_expression_simplify_to("3^(-4)", "1/81");
   assert_parsed_expression_simplify_to("(-3)^3", "-27");
-  assert_parsed_expression_simplify_to("1256^(1/3)*x", "2*root(157,3)*x");
-  assert_parsed_expression_simplify_to("1256^(-1/3)", "1/(2*root(157,3))");
+  assert_parsed_expression_simplify_to("1256^(1/3)×x", "2×root(157,3)×x");
+  assert_parsed_expression_simplify_to("1256^(-1/3)", "1/(2×root(157,3))");
   assert_parsed_expression_simplify_to("32^(-1/5)", "1/2");
   assert_parsed_expression_simplify_to("(2+3-4)^(x)", "1");
   assert_parsed_expression_simplify_to("1^x", "1");
@@ -51,38 +53,38 @@ QUIZ_CASE(poincare_power_simplify) {
   assert_parsed_expression_simplify_to("0^0", Undefined::Name());
   assert_parsed_expression_simplify_to("0^(-3)", Undefined::Name());
   assert_parsed_expression_simplify_to("4^0.5", "2");
-  assert_parsed_expression_simplify_to("8^0.5", "2*R(2)");
-  assert_parsed_expression_simplify_to("(12^4*3)^(0.5)", "144*R(3)");
-  assert_parsed_expression_simplify_to("(2^A)^B", "2^(A*B)");
-  assert_parsed_expression_simplify_to("(2*A)^B", "2^B*A^B");
-  assert_parsed_expression_simplify_to("(12^4*x)^(0.5)", "144*R(x)");
-  assert_parsed_expression_simplify_to("R(32)", "4*R(2)");
-  assert_parsed_expression_simplify_to("R(-1)", "I");
-  assert_parsed_expression_simplify_to("R(-1*R(-1))", "R(2)/2-R(2)/2*I");
-  assert_parsed_expression_simplify_to("R(3^2)", "3");
-  assert_parsed_expression_simplify_to("2^(2+P)", "4*2^P");
-  assert_parsed_expression_simplify_to("R(5513219850886344455940081)", "2348024669991");
-  assert_parsed_expression_simplify_to("R(154355776)", "12424");
-  assert_parsed_expression_simplify_to("R(P)^2", "P");
-  assert_parsed_expression_simplify_to("R(P^2)", "P");
-  assert_parsed_expression_simplify_to("R((-P)^2)", "P");
-  assert_parsed_expression_simplify_to("R(x*144)", "12*R(x)");
-  assert_parsed_expression_simplify_to("R(x*144*P^2)", "12*P*R(x)");
-  assert_parsed_expression_simplify_to("R(x*144*P)", "12*R(P)*R(x)");
-  assert_parsed_expression_simplify_to("(-1)*(2+(-4*R(2)))", "4*R(2)-2");
-  assert_parsed_expression_simplify_to("x^(1/2)", "R(x)");
-  assert_parsed_expression_simplify_to("x^(-1/2)", "1/R(x)");
+  assert_parsed_expression_simplify_to("8^0.5", "2×√(2)");
+  assert_parsed_expression_simplify_to("(12^4×3)^(0.5)", "144×√(3)");
+  assert_parsed_expression_simplify_to("(2^A)^B", "2^(A×B)");
+  assert_parsed_expression_simplify_to("(2×A)^B", "2^B×A^B");
+  assert_parsed_expression_simplify_to("(12^4×x)^(0.5)", "144×√(x)");
+  assert_parsed_expression_simplify_to("√(32)", "4×√(2)");
+  assert_parsed_expression_simplify_to("√(-1)", "𝐢");
+  assert_parsed_expression_simplify_to("√(-1×√(-1))", "√(2)/2-√(2)/2×𝐢");
+  assert_parsed_expression_simplify_to("√(3^2)", "3");
+  assert_parsed_expression_simplify_to("2^(2+π)", "4×2^π");
+  assert_parsed_expression_simplify_to("√(5513219850886344455940081)", "2348024669991");
+  assert_parsed_expression_simplify_to("√(154355776)", "12424");
+  assert_parsed_expression_simplify_to("√(π)^2", "π");
+  assert_parsed_expression_simplify_to("√(π^2)", "π");
+  assert_parsed_expression_simplify_to("√((-π)^2)", "π");
+  assert_parsed_expression_simplify_to("√(x×144)", "12×√(x)");
+  assert_parsed_expression_simplify_to("√(x×144×π^2)", "12×π×√(x)");
+  assert_parsed_expression_simplify_to("√(x×144×π)", "12×√(π)×√(x)");
+  assert_parsed_expression_simplify_to("(-1)×(2+(-4×√(2)))", "4×√(2)-2");
+  assert_parsed_expression_simplify_to("x^(1/2)", "√(x)");
+  assert_parsed_expression_simplify_to("x^(-1/2)", "1/√(x)");
   assert_parsed_expression_simplify_to("x^(1/7)", "root(x,7)");
   assert_parsed_expression_simplify_to("x^(-1/7)", "1/root(x,7)");
-  assert_parsed_expression_simplify_to("1/(3R(2))", "R(2)/6");
-  assert_parsed_expression_simplify_to("X^ln(3)", "3");
-  assert_parsed_expression_simplify_to("X^ln(R(3))", "R(3)");
-  assert_parsed_expression_simplify_to("P^log(R(3),P)", "R(3)");
-  assert_parsed_expression_simplify_to("10^log(P)", "P");
-  assert_parsed_expression_simplify_to("X^ln(65)", "65");
-  assert_parsed_expression_simplify_to("X^ln(PX)", "P*X");
-  assert_parsed_expression_simplify_to("X^log(PX)", "X^(log(X)+log(P))");
-  assert_parsed_expression_simplify_to("R(X^2)", "X");
+  assert_parsed_expression_simplify_to("1/(3√(2))", "√(2)/6");
+  assert_parsed_expression_simplify_to("ℯ^ln(3)", "3");
+  assert_parsed_expression_simplify_to("ℯ^ln(√(3))", "√(3)");
+  assert_parsed_expression_simplify_to("π^log(√(3),π)", "√(3)");
+  assert_parsed_expression_simplify_to("10^log(π)", "π");
+  assert_parsed_expression_simplify_to("ℯ^ln(65)", "65");
+  assert_parsed_expression_simplify_to("ℯ^ln(πℯ)", "π×ℯ");
+  assert_parsed_expression_simplify_to("ℯ^log(πℯ)", "ℯ^(log(ℯ)+log(π))");
+  assert_parsed_expression_simplify_to("√(ℯ^2)", "ℯ");
   assert_parsed_expression_simplify_to("999^(10000/3)", "999^(10000/3)");
   /* This does not reduce but should not as the integer is above
    * k_maxNumberOfPrimeFactors and thus it prime decomposition might overflow
@@ -91,18 +93,18 @@ QUIZ_CASE(poincare_power_simplify) {
   /* This does not reduce but should not as the prime decomposition involves
    * factors above k_maxNumberOfPrimeFactors. */
   assert_parsed_expression_simplify_to("1002101470343^(1/3)", "root(1002101470343,3)");
-  assert_parsed_expression_simplify_to("P*P*P", "P^3");
-  assert_parsed_expression_simplify_to("(x+P)^(3)", "x^3+3*P*x^2+3*P^2*x+P^3");
-  assert_parsed_expression_simplify_to("(5+R(2))^(-8)", "(-1003320*R(2)+1446241)/78310985281");
-  assert_parsed_expression_simplify_to("(5*P+R(2))^(-5)", "1/(3125*P^5+3125*R(2)*P^4+2500*P^3+500*R(2)*P^2+100*P+4*R(2))");
-  assert_parsed_expression_simplify_to("(1+R(2)+R(3))^5", "120*R(6)+184*R(3)+224*R(2)+296");
-  assert_parsed_expression_simplify_to("(P+R(2)+R(3)+x)^(-3)", "1/(x^3+3*P*x^2+3*R(3)*x^2+3*R(2)*x^2+3*P^2*x+6*R(3)*P*x+6*R(2)*P*x+6*R(6)*x+15*x+P^3+3*R(3)*P^2+3*R(2)*P^2+6*R(6)*P+15*P+9*R(3)+11*R(2))");
+  assert_parsed_expression_simplify_to("π×π×π", "π^3");
+  assert_parsed_expression_simplify_to("(x+π)^(3)", "x^3+3×π×x^2+3×π^2×x+π^3");
+  assert_parsed_expression_simplify_to("(5+√(2))^(-8)", "(-1003320×√(2)+1446241)/78310985281");
+  assert_parsed_expression_simplify_to("(5×π+√(2))^(-5)", "1/(3125×π^5+3125×√(2)×π^4+2500×π^3+500×√(2)×π^2+100×π+4×√(2))");
+  assert_parsed_expression_simplify_to("(1+√(2)+√(3))^5", "120×√(6)+184×√(3)+224×√(2)+296");
+  assert_parsed_expression_simplify_to("(π+√(2)+√(3)+x)^(-3)", "1/(x^3+3×π×x^2+3×√(3)×x^2+3×√(2)×x^2+3×π^2×x+6×√(3)×π×x+6×√(2)×π×x+6×√(6)×x+15×x+π^3+3×√(3)×π^2+3×√(2)×π^2+6×√(6)×π+15×π+9×√(3)+11×√(2))");
   assert_parsed_expression_simplify_to("1.0066666666667^60", "(10066666666667/10000000000000)^60");
-  assert_parsed_expression_simplify_to("2^(6+P+x)", "64*2^(x+P)");
-  assert_parsed_expression_simplify_to("I^(2/3)", "1/2+R(3)/2*I");
-  assert_parsed_expression_simplify_to("X^(I*P/3)", "1/2+R(3)/2*I");
-  assert_parsed_expression_simplify_to("(-1)^(1/3)", "1/2+R(3)/2*I");
+  assert_parsed_expression_simplify_to("2^(6+π+x)", "64×2^(x+π)");
+  assert_parsed_expression_simplify_to("𝐢^(2/3)", "1/2+√(3)/2×𝐢");
+  assert_parsed_expression_simplify_to("ℯ^(𝐢×π/3)", "1/2+√(3)/2×𝐢");
+  assert_parsed_expression_simplify_to("(-1)^(1/3)", "1/2+√(3)/2×𝐢");
   assert_parsed_expression_simplify_to("R(-x)", "R(-x)");
-  assert_parsed_expression_simplify_to("R(x)^2", "x", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("R(x)^2", "R(x)^2", User, Radian, Real);
+  assert_parsed_expression_simplify_to("√(x)^2", "x", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("√(x)^2", "√(x)^2", User, Radian, Real);
 }
diff --git a/poincare/test/properties.cpp b/poincare/test/properties.cpp
index e36b93fb2..c122a1020 100644
--- a/poincare/test/properties.cpp
+++ b/poincare/test/properties.cpp
@@ -21,10 +21,10 @@ void assert_parsed_expression_sign(const char * expression, Poincare::Expression
 
 QUIZ_CASE(poincare_sign) {
   assert_parsed_expression_sign("abs(-cos(2)+I)", Positive);
-  assert_parsed_expression_sign("2.345E-23", Positive);
-  assert_parsed_expression_sign("-2.345E-23", Negative);
-  assert_parsed_expression_sign("2*(-3)*abs(-32)", Negative);
-  assert_parsed_expression_sign("2*(-3)*abs(-32)*cos(3)", Unknown);
+  assert_parsed_expression_sign("2.345ᴇ-23", Positive);
+  assert_parsed_expression_sign("-2.345ᴇ-23", Negative);
+  assert_parsed_expression_sign("2×(-3)×abs(-32)", Negative);
+  assert_parsed_expression_sign("2×(-3)×abs(-32)×cos(3)", Unknown);
   assert_parsed_expression_sign("x", Unknown);
   assert_parsed_expression_sign("2^(-abs(3))", Positive);
   assert_parsed_expression_sign("(-2)^4", Positive);
@@ -32,35 +32,35 @@ QUIZ_CASE(poincare_sign) {
   assert_parsed_expression_sign("random()", Positive);
   assert_parsed_expression_sign("42/3", Positive);
   assert_parsed_expression_sign("-23/32", Negative);
-  assert_parsed_expression_sign("P", Positive);
-  assert_parsed_expression_sign("X", Positive);
+  assert_parsed_expression_sign("π", Positive);
+  assert_parsed_expression_sign("ℯ", Positive);
   assert_parsed_expression_sign("0", Positive);
   assert_parsed_expression_sign("cos(90)", Positive);
-  assert_parsed_expression_sign("R(-1)", Unknown);
-  assert_parsed_expression_sign("R(-1)", Unknown, Real);
+  assert_parsed_expression_sign("√(-1)", Unknown);
+  assert_parsed_expression_sign("√(-1)", Unknown, Real);
 }
 
 QUIZ_CASE(poincare_polynomial_degree) {
   assert_parsed_expression_polynomial_degree("x+1", 1);
   assert_parsed_expression_polynomial_degree("cos(2)+1", 0);
   assert_parsed_expression_polynomial_degree("confidence(0.2,10)+1", -1);
-  assert_parsed_expression_polynomial_degree("diff(3*x+x,x,2)", -1);
-  assert_parsed_expression_polynomial_degree("diff(3*x+x,x,x)", -1);
-  assert_parsed_expression_polynomial_degree("diff(3*x+x,x,x)", 0, "a");
-  assert_parsed_expression_polynomial_degree("(3*x+2)/3", 1);
-  assert_parsed_expression_polynomial_degree("(3*x+2)/x", -1);
-  assert_parsed_expression_polynomial_degree("int(2*x,x, 0, 1)", -1);
-  assert_parsed_expression_polynomial_degree("int(2*x,x, 0, 1)", 0, "a");
+  assert_parsed_expression_polynomial_degree("diff(3×x+x,x,2)", -1);
+  assert_parsed_expression_polynomial_degree("diff(3×x+x,x,x)", -1);
+  assert_parsed_expression_polynomial_degree("diff(3×x+x,x,x)", 0, "a");
+  assert_parsed_expression_polynomial_degree("(3×x+2)/3", 1);
+  assert_parsed_expression_polynomial_degree("(3×x+2)/x", -1);
+  assert_parsed_expression_polynomial_degree("int(2×x,x, 0, 1)", -1);
+  assert_parsed_expression_polynomial_degree("int(2×x,x, 0, 1)", 0, "a");
   assert_parsed_expression_polynomial_degree("[[1,2][3,4]]", -1);
-  assert_parsed_expression_polynomial_degree("(x^2+2)*(x+1)", 3);
+  assert_parsed_expression_polynomial_degree("(x^2+2)×(x+1)", 3);
   assert_parsed_expression_polynomial_degree("-(x+1)", 1);
   assert_parsed_expression_polynomial_degree("(x^2+2)^(3)", 6);
   assert_parsed_expression_polynomial_degree("prediction(0.2,10)+1", -1);
   assert_parsed_expression_polynomial_degree("2-x-x^3", 3);
-  assert_parsed_expression_polynomial_degree("P*x", 1);
-  assert_parsed_expression_polynomial_degree("R(-1)*x", -1, "x", Real);
-  // f: x->x^2+Px+1
-  assert_simplify("1+P*x+x^2>f(x)");
+  assert_parsed_expression_polynomial_degree("π×x", 1);
+  assert_parsed_expression_polynomial_degree("√(-1)×x", -1, "x", Real);
+  // f: x→x^2+πx+1
+  assert_simplify("1+π×x+x^2→f(x)");
   assert_parsed_expression_polynomial_degree("f(x)", 2);
 }
 
@@ -87,7 +87,7 @@ QUIZ_CASE(poincare_characteristic_range) {
   assert_expression_has_characteristic_range(Addition::Builder(Cosine::Builder(Rational::Builder(3)),Rational::Builder(2)), 0.0f);
   assert_expression_has_characteristic_range(CommonLogarithm::Builder(Cosine::Builder(Multiplication::Builder(Rational::Builder(40),Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)))), 9.0f);
   assert_expression_has_characteristic_range(Cosine::Builder((Expression)Cosine::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX))), 360.0f);
-  assert_simplify("cos(x)>f(x)");
+  assert_simplify("cos(x)→f(x)");
   assert_expression_has_characteristic_range(Function::Builder("f",1,Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)), 360.0f);
 }
 
@@ -114,17 +114,17 @@ QUIZ_CASE(poincare_get_variables) {
   const char * variableBuffer1[] = {"x","y",""};
   assert_parsed_expression_has_variables("x+y", variableBuffer1, 2);
   const char * variableBuffer2[] = {"x","y","z","t",""};
-  assert_parsed_expression_has_variables("x+y+z+2*t", variableBuffer2, 4);
+  assert_parsed_expression_has_variables("x+y+z+2×t", variableBuffer2, 4);
   const char * variableBuffer3[] = {"a","x","y","k","A", ""};
-  assert_parsed_expression_has_variables("a+x^2+2*y+k!*A", variableBuffer3, 5);
+  assert_parsed_expression_has_variables("a+x^2+2×y+k!×A", variableBuffer3, 5);
   const char * variableBuffer4[] = {"BABA","abab", ""};
   assert_parsed_expression_has_variables("BABA+abab", variableBuffer4, 2);
   const char * variableBuffer5[] = {"BBBBBB", ""};
   assert_parsed_expression_has_variables("BBBBBB", variableBuffer5, 1);
   const char * variableBuffer6[] = {""};
   assert_parsed_expression_has_variables("a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+aa+bb+cc+dd+ee+ff+gg+hh+ii+jj+kk+ll+mm+nn+oo", variableBuffer6, -1);
-  // f: x->1+Px+x^2+toto
-  assert_simplify("1+P*x+x^2+toto>f(x)");
+  // f: x→1+πx+x^2+toto
+  assert_simplify("1+π×x+x^2+toto→f(x)");
   const char * variableBuffer7[] = {"tata","toto", ""};
   assert_parsed_expression_has_variables("f(tata)", variableBuffer7, 2);
 }
@@ -149,19 +149,19 @@ void assert_parsed_expression_has_polynomial_coefficient(const char * expression
 QUIZ_CASE(poincare_get_polynomial_coefficients) {
   const char * coefficient0[] = {"2", "1", "1", 0};
   assert_parsed_expression_has_polynomial_coefficient("x^2+x+2", "x", coefficient0);
-  const char * coefficient1[] = {"12+(-6)*P", "12", "3", 0}; //3*x^2+12*x-6*π+12
-  assert_parsed_expression_has_polynomial_coefficient("3*(x+2)^2-6*P", "x", coefficient1);
+  const char * coefficient1[] = {"12+(-6)×π", "12", "3", 0}; //3×x^2+12×x-6×π+12
+  assert_parsed_expression_has_polynomial_coefficient("3×(x+2)^2-6×π", "x", coefficient1);
   // TODO: decomment when enable 3-degree polynomes
-  //const char * coefficient2[] = {"2+32*x", "2", "6", "2", 0}; //2*n^3+6*n^2+2*n+2+32*x
-  //assert_parsed_expression_has_polynomial_coefficient("2*(n+1)^3-4n+32*x", "n", coefficient2);
-  const char * coefficient3[] = {"1", "-P", "1", 0}; //x^2-Pi*x+1
-  assert_parsed_expression_has_polynomial_coefficient("x^2-P*x+1", "x", coefficient3);
-  // f: x->x^2+Px+1
-  const char * coefficient4[] = {"1", "P", "1", 0}; //x^2+Pi*x+1
-  assert_simplify("1+P*x+x^2>f(x)");
+  //const char * coefficient2[] = {"2+32×x", "2", "6", "2", 0}; //2×n^3+6×n^2+2×n+2+32×x
+  //assert_parsed_expression_has_polynomial_coefficient("2×(n+1)^3-4n+32×x", "n", coefficient2);
+  const char * coefficient3[] = {"1", "-π", "1", 0}; //x^2-π×x+1
+  assert_parsed_expression_has_polynomial_coefficient("x^2-π×x+1", "x", coefficient3);
+  // f: x→x^2+Px+1
+  const char * coefficient4[] = {"1", "π", "1", 0}; //x^2+π×x+1
+  assert_simplify("1+π×x+x^2→f(x)");
   assert_parsed_expression_has_polynomial_coefficient("f(x)", "x", coefficient4);
-  const char * coefficient5[] = {"0", "I", 0}; //R(-1)x
-  assert_parsed_expression_has_polynomial_coefficient("R(-1)x", "x", coefficient5);
-  const char * coefficient6[] = {0}; //R(-1)x
-  assert_parsed_expression_has_polynomial_coefficient("R(-1)x", "x", coefficient6, Real);
+  const char * coefficient5[] = {"0", "𝐢", 0}; //√(-1)x
+  assert_parsed_expression_has_polynomial_coefficient("√(-1)x", "x", coefficient5);
+  const char * coefficient6[] = {0}; //√(-1)x
+  assert_parsed_expression_has_polynomial_coefficient("√(-1)x", "x", coefficient6, Real);
 }
diff --git a/poincare/test/rational.cpp b/poincare/test/rational.cpp
index 66d42daaf..87baebe4f 100644
--- a/poincare/test/rational.cpp
+++ b/poincare/test/rational.cpp
@@ -111,8 +111,8 @@ QUIZ_CASE(poincare_rational_simplify) {
   assert_parsed_expression_simplify_to("0.1234", "617/5000");
   assert_parsed_expression_simplify_to("0.1234000", "617/5000");
   assert_parsed_expression_simplify_to("001234000", "1234000");
-  assert_parsed_expression_simplify_to("001.234000E3", "1234");
-  assert_parsed_expression_simplify_to("001234000E-4", "617/5");
+  assert_parsed_expression_simplify_to("001.234000ᴇ3", "1234");
+  assert_parsed_expression_simplify_to("001234000ᴇ-4", "617/5");
   assert_parsed_expression_simplify_to("3/4+5/4-12+1/567", "-5669/567");
   assert_parsed_expression_simplify_to("34/78+67^(-1)", "1178/2613");
   assert_parsed_expression_simplify_to("12348/34564", "3087/8641");
@@ -123,14 +123,14 @@ QUIZ_CASE(poincare_rational_simplify) {
   assert_parsed_expression_simplify_to("999^-999", "1/999^999");
   assert_parsed_expression_simplify_to("0^0", Undefined::Name());
   assert_parsed_expression_simplify_to("x^0", "1");
-  assert_parsed_expression_simplify_to("P^0", "1");
+  assert_parsed_expression_simplify_to("π^0", "1");
   assert_parsed_expression_simplify_to("A^0", "1");
   assert_parsed_expression_simplify_to("(-3)^0", "1");
 }
 
 QUIZ_CASE(poincare_rational_approximate) {
   assert_parsed_expression_evaluates_to<float>("1/3", "0.3333333");
-  assert_parsed_expression_evaluates_to<double>("123456/1234567", "9.9999432999586E-2");
+  assert_parsed_expression_evaluates_to<double>("123456/1234567", "9.9999432999586ᴇ-2");
 }
 
 
diff --git a/poincare/test/simplify.cpp b/poincare/test/simplify.cpp
index e6a5e6e2f..52f1f77f2 100644
--- a/poincare/test/simplify.cpp
+++ b/poincare/test/simplify.cpp
@@ -10,14 +10,14 @@ using namespace std;
 
 using namespace Poincare;
 QUIZ_CASE(poincare_reduction_target) {
-  assert_parsed_expression_simplify_to("1/P+1/x", "1/x+1/P", System);
-  assert_parsed_expression_simplify_to("1/P+1/x", "(x+P)/(P*x)", User);
+  assert_parsed_expression_simplify_to("1/π+1/x", "1/x+1/π", System);
+  assert_parsed_expression_simplify_to("1/π+1/x", "(x+π)/(π×x)", User);
 
-  assert_parsed_expression_simplify_to("1/(1+I)", "1/(I+1)", System);
-  assert_parsed_expression_simplify_to("1/(1+I)", "1/2-1/2*I", User);
+  assert_parsed_expression_simplify_to("1/(1+𝐢)", "1/(𝐢+1)", System);
+  assert_parsed_expression_simplify_to("1/(1+𝐢)", "1/2-1/2×𝐢", User);
 
-  assert_parsed_expression_simplify_to("sin(x)/(cos(x)*cos(x))", "sin(x)/cos(x)^2", System);
-  assert_parsed_expression_simplify_to("sin(x)/(cos(x)*cos(x))", "tan(x)/cos(x)", User);
+  assert_parsed_expression_simplify_to("sin(x)/(cos(x)×cos(x))", "sin(x)/cos(x)^2", System);
+  assert_parsed_expression_simplify_to("sin(x)/(cos(x)×cos(x))", "tan(x)/cos(x)", User);
 
   assert_parsed_expression_simplify_to("x^0", "x^0", System);
   assert_parsed_expression_simplify_to("x^0", "1", User);
@@ -29,14 +29,14 @@ QUIZ_CASE(poincare_reduction_target) {
   assert_parsed_expression_simplify_to("x^2", "x^2", System);
   assert_parsed_expression_simplify_to("x^2", "x^2", User);
 
-  assert_parsed_expression_simplify_to("1/(R(2)+R(3))", "1/(R(3)+R(2))", System);
-  assert_parsed_expression_simplify_to("1/(R(2)+R(3))", "R(3)-R(2)", User);
+  assert_parsed_expression_simplify_to("1/(√(2)+√(3))", "1/(√(3)+√(2))", System);
+  assert_parsed_expression_simplify_to("1/(√(2)+√(3))", "√(3)-√(2)", User);
 
   assert_parsed_expression_simplify_to("sign(abs(x))", "sign(abs(x))", System);
   assert_parsed_expression_simplify_to("sign(abs(x))", "1", User);
 
   assert_parsed_expression_simplify_to("atan(1/x)", "atan(1/x)", System);
-  assert_parsed_expression_simplify_to("atan(1/x)", "(P*sign(x)-2*atan(x))/2", User);
+  assert_parsed_expression_simplify_to("atan(1/x)", "(π×sign(x)-2×atan(x))/2", User);
 
   assert_parsed_expression_simplify_to("(1+x)/(1+x)", "(x+1)^0", System);
   assert_parsed_expression_simplify_to("(1+x)/(1+x)", "1", User);
@@ -44,47 +44,47 @@ QUIZ_CASE(poincare_reduction_target) {
 
 QUIZ_CASE(poincare_simplify_mix) {
   // Root at denominator
-  assert_parsed_expression_simplify_to("1/(R(2)+R(3))", "R(3)-R(2)");
-  assert_parsed_expression_simplify_to("1/(5+R(3))", "(-R(3)+5)/22");
-  assert_parsed_expression_simplify_to("1/(R(2)+4)", "(-R(2)+4)/14");
-  assert_parsed_expression_simplify_to("1/(2R(2)-4)", "(-R(2)-2)/4");
-  assert_parsed_expression_simplify_to("1/(-2R(2)+4)", "(R(2)+2)/4");
+  assert_parsed_expression_simplify_to("1/(√(2)+√(3))", "√(3)-√(2)");
+  assert_parsed_expression_simplify_to("1/(5+√(3))", "(-√(3)+5)/22");
+  assert_parsed_expression_simplify_to("1/(√(2)+4)", "(-√(2)+4)/14");
+  assert_parsed_expression_simplify_to("1/(2√(2)-4)", "(-√(2)-2)/4");
+  assert_parsed_expression_simplify_to("1/(-2√(2)+4)", "(√(2)+2)/4");
   assert_parsed_expression_simplify_to("45^2", "2025");
-  assert_parsed_expression_simplify_to("1/(R(2)ln(3))", "R(2)/(2*ln(3))");
-  assert_parsed_expression_simplify_to("R(3/2)", "R(6)/2");
+  assert_parsed_expression_simplify_to("1/(√(2)ln(3))", "√(2)/(2×ln(3))");
+  assert_parsed_expression_simplify_to("√(3/2)", "√(6)/2");
 
   // Common operation mix
-  assert_parsed_expression_simplify_to("(R(2)*P + R(2)*X)/R(2)", "X+P");
-  assert_parsed_expression_simplify_to("P+(3R(2)-2R(3))/25", "(25*P-2*R(3)+3*R(2))/25");
+  assert_parsed_expression_simplify_to("(√(2)×π + √(2)×ℯ)/√(2)", "ℯ+π");
+  assert_parsed_expression_simplify_to("π+(3√(2)-2√(3))/25", "(25×π-2×√(3)+3×√(2))/25");
   assert_parsed_expression_simplify_to("ln(2+3)", "ln(5)");
-  assert_parsed_expression_simplify_to("3*A*B*C+4*cos(2)-2*A*B*C+A*B*C+ln(3)+4*A*B-5*A*B*C+cos(3)*ln(5)+cos(2)-45*cos(2)", "cos(3)*ln(5)+ln(3)-40*cos(2)+4*A*B-3*A*B*C");
-  assert_parsed_expression_simplify_to("2*A+3*cos(2)+3+4*ln(5)+5*A+2*ln(5)+1+0", "6*ln(5)+3*cos(2)+7*A+4");
-  assert_parsed_expression_simplify_to("2.3*A+3*cos(2)+3+4*ln(5)+5*A+2*ln(5)+1.2+0.235", "(1200*ln(5)+600*cos(2)+1460*A+887)/200");
-  assert_parsed_expression_simplify_to("2*A*B*C+2.3*A*B+3*A^2+5.2*A*B*C+4*A^2", "(70*A^2+23*A*B+72*A*B*C)/10");
-  assert_parsed_expression_simplify_to("(A*B)^2*A+4*A^3", "4*A^3+A^3*B^2");
-  assert_parsed_expression_simplify_to("(A*3)^2*A+4*A^3", "13*A^3");
-  assert_parsed_expression_simplify_to("A^2^2*A+4*A^3", "A^5+4*A^3");
-  assert_parsed_expression_simplify_to("0.5+4*A*B-2.3+2*A*B-2*B*A^C-cos(4)+2*A^C*B+A*B*C*D", "(-5*cos(4)+30*A*B+5*A*B*C*D-9)/5");
-  assert_parsed_expression_simplify_to("(1+R(2))/5", "(R(2)+1)/5");
-  assert_parsed_expression_simplify_to("(2+R(6))^2", "4*R(6)+10");
-  assert_parsed_expression_simplify_to("tan(3)ln(2)+P", "tan(3)*ln(2)+P");
+  assert_parsed_expression_simplify_to("3×A×B×C+4×cos(2)-2×A×B×C+A×B×C+ln(3)+4×A×B-5×A×B×C+cos(3)×ln(5)+cos(2)-45×cos(2)", "cos(3)×ln(5)+ln(3)-40×cos(2)+4×A×B-3×A×B×C");
+  assert_parsed_expression_simplify_to("2×A+3×cos(2)+3+4×ln(5)+5×A+2×ln(5)+1+0", "6×ln(5)+3×cos(2)+7×A+4");
+  assert_parsed_expression_simplify_to("2.3×A+3×cos(2)+3+4×ln(5)+5×A+2×ln(5)+1.2+0.235", "(1200×ln(5)+600×cos(2)+1460×A+887)/200");
+  assert_parsed_expression_simplify_to("2×A×B×C+2.3×A×B+3×A^2+5.2×A×B×C+4×A^2", "(70×A^2+23×A×B+72×A×B×C)/10");
+  assert_parsed_expression_simplify_to("(A×B)^2×A+4×A^3", "4×A^3+A^3×B^2");
+  assert_parsed_expression_simplify_to("(A×3)^2×A+4×A^3", "13×A^3");
+  assert_parsed_expression_simplify_to("A^2^2×A+4×A^3", "A^5+4×A^3");
+  assert_parsed_expression_simplify_to("0.5+4×A×B-2.3+2×A×B-2×B×A^C-cos(4)+2×A^C×B+A×B×C×D", "(-5×cos(4)+30×A×B+5×A×B×C×D-9)/5");
+  assert_parsed_expression_simplify_to("(1+√(2))/5", "(√(2)+1)/5");
+  assert_parsed_expression_simplify_to("(2+√(6))^2", "4×√(6)+10");
+  assert_parsed_expression_simplify_to("tan(3)ln(2)+π", "tan(3)×ln(2)+π");
 
   // Complex
-  assert_parsed_expression_simplify_to("I", "I");
-  assert_parsed_expression_simplify_to("R(-33)", "R(33)*I");
-  assert_parsed_expression_simplify_to("I^(3/5)", "(R(2)*R(-R(5)+5))/4+(R(5)+1)/4*I");
-  assert_parsed_expression_simplify_to("IIII", "1");
-  assert_parsed_expression_simplify_to("R(-I)", "R(2)/2-R(2)/2*I");
-  assert_parsed_expression_simplify_to("A*cos(9)IIln(2)", "-A*cos(9)*ln(2)");
-  assert_parsed_expression_simplify_to("(R(2)+R(2)*I)/2(R(2)+R(2)*I)/2(R(2)+R(2)*I)/2", "R(2)/32-R(2)/32*I");
-  assert_parsed_expression_simplify_to("root(5^((-I)3^9),I)", "1/X^atan(tan(19683*ln(5)))");
-  assert_parsed_expression_simplify_to("I^I", "1/X^(P/2)");
-  assert_parsed_expression_simplify_to("I/(1+I*R(x))", "I/(R(x)*I+1)");
-  assert_parsed_expression_simplify_to("x+I/(1+I*R(x))", "(x^(3/2)*I+I+x)/(R(x)*I+1)");
+  assert_parsed_expression_simplify_to("𝐢", "𝐢");
+  assert_parsed_expression_simplify_to("√(-33)", "√(33)×𝐢");
+  assert_parsed_expression_simplify_to("𝐢^(3/5)", "(√(2)×√(-√(5)+5))/4+(√(5)+1)/4×𝐢");
+  assert_parsed_expression_simplify_to("𝐢𝐢𝐢𝐢", "1");
+  assert_parsed_expression_simplify_to("√(-𝐢)", "√(2)/2-√(2)/2×𝐢");
+  assert_parsed_expression_simplify_to("A×cos(9)𝐢𝐢ln(2)", "-A×cos(9)×ln(2)");
+  assert_parsed_expression_simplify_to("(√(2)+√(2)×𝐢)/2(√(2)+√(2)×𝐢)/2(√(2)+√(2)×𝐢)/2", "√(2)/32-√(2)/32×𝐢");
+  assert_parsed_expression_simplify_to("root(5^((-𝐢)3^9),𝐢)", "1/ℯ^atan(tan(19683×ln(5)))");
+  assert_parsed_expression_simplify_to("𝐢^𝐢", "1/ℯ^(π/2)");
+  assert_parsed_expression_simplify_to("𝐢/(1+𝐢×√(x))", "𝐢/(√(x)×𝐢+1)");
+  assert_parsed_expression_simplify_to("x+𝐢/(1+𝐢×√(x))", "(x^(3/2)×𝐢+𝐢+x)/(√(x)×𝐢+1)");
 
   //assert_parsed_expression_simplify_to("log(cos(9)^ln(6), cos(9))", "ln(2)+ln(3)"); // TODO: for this to work, we must know the sign of cos(9)
-  //assert_parsed_expression_simplify_to("log(cos(9)^ln(6), 9)", "ln(6)*log(cos(9), 9)"); // TODO: for this to work, we must know the sign of cos(9)
-  assert_parsed_expression_simplify_to("(((R(6)-R(2))/4)/((R(6)+R(2))/4))+1", "-R(3)+3");
-  //assert_parsed_expression_simplify_to("1/R(I) * (R(2)-I*R(2))", "-2I"); // TODO: get rid of complex at denominator?
+  //assert_parsed_expression_simplify_to("log(cos(9)^ln(6), 9)", "ln(6)×log(cos(9), 9)"); // TODO: for this to work, we must know the sign of cos(9)
+  assert_parsed_expression_simplify_to("(((√(6)-√(2))/4)/((√(6)+√(2))/4))+1", "-√(3)+3");
+  //assert_parsed_expression_simplify_to("1/√(𝐢) × (√(2)-𝐢×√(2))", "-2𝐢"); // TODO: get rid of complex at denominator?
 
 }
diff --git a/poincare/test/store.cpp b/poincare/test/store.cpp
index deb1dc30d..17a447621 100644
--- a/poincare/test/store.cpp
+++ b/poincare/test/store.cpp
@@ -6,8 +6,8 @@
 using namespace Poincare;
 
 QUIZ_CASE(poincare_store_evaluate) {
-  assert_parsed_expression_evaluates_to<float>("1+42>A", "43");
-  assert_parsed_expression_evaluates_to<double>("0.123+I>B", "0.123+I");
+  assert_parsed_expression_evaluates_to<float>("1+42→A", "43");
+  assert_parsed_expression_evaluates_to<double>("0.123+𝐢→B", "0.123+𝐢");
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("A.exp").destroy();
@@ -15,17 +15,17 @@ QUIZ_CASE(poincare_store_evaluate) {
 }
 
 QUIZ_CASE(poincare_store_simplify) {
-  assert_parsed_expression_simplify_to("1+2>x", "3");
-  assert_parsed_expression_simplify_to("0.1+0.2>x", "3/10");
-  assert_parsed_expression_simplify_to("a+a>x", "2*a");
+  assert_parsed_expression_simplify_to("1+2→x", "3");
+  assert_parsed_expression_simplify_to("0.1+0.2→x", "3/10");
+  assert_parsed_expression_simplify_to("a+a→x", "2×a");
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
 }
 
 QUIZ_CASE(poincare_store_matrix) {
-  assert_parsed_expression_evaluates_to<double>("[[7]]>a", "[[7]]");
-  assert_parsed_expression_simplify_to("1+1>a", "2");
+  assert_parsed_expression_evaluates_to<double>("[[7]]→a", "[[7]]");
+  assert_parsed_expression_simplify_to("1+1→a", "2");
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
@@ -33,19 +33,19 @@ QUIZ_CASE(poincare_store_matrix) {
 
 QUIZ_CASE(poincare_store_that_should_fail) {
   // Create a helper function
-  assert_parsed_expression_simplify_to("1>g(x)", "1");
+  assert_parsed_expression_simplify_to("1→g(x)", "1");
 
   // Store only works on variables or functions
-  assert_expression_not_parsable("2>f(2)");
-  assert_expression_not_parsable("3>f(g(4))");
+  assert_expression_not_parsable("2→f(2)");
+  assert_expression_not_parsable("3→f(g(4))");
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("g.func").destroy();
 }
 
 QUIZ_CASE(poincare_store_overwrite) {
-  assert_parsed_expression_simplify_to("2>g", "2");
-  assert_parsed_expression_simplify_to("-1>g(x)", "-1");
+  assert_parsed_expression_simplify_to("2→g", "2");
+  assert_parsed_expression_simplify_to("-1→g(x)", "-1");
   assert_parsed_expression_evaluates_to<double>("g(4)", "-1");
 
   // Clean the storage for other tests
@@ -53,9 +53,9 @@ QUIZ_CASE(poincare_store_overwrite) {
 }
 
 QUIZ_CASE(poincare_store_do_not_overwrite) {
-  assert_parsed_expression_simplify_to("-1>g(x)", "-1");
-  assert_parsed_expression_simplify_to("1+g(x)>f(x)", "0");
-  assert_parsed_expression_simplify_to("2>g", Undefined::Name());
+  assert_parsed_expression_simplify_to("-1→g(x)", "-1");
+  assert_parsed_expression_simplify_to("1+g(x)→f(x)", "0");
+  assert_parsed_expression_simplify_to("2→g", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("g(4)", "-1");
   assert_parsed_expression_evaluates_to<double>("f(4)", "0");
 
diff --git a/poincare/test/subtraction.cpp b/poincare/test/subtraction.cpp
index 905e54b7c..80b218aa1 100644
--- a/poincare/test/subtraction.cpp
+++ b/poincare/test/subtraction.cpp
@@ -7,14 +7,14 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_subtraction_evaluate) {
   assert_parsed_expression_evaluates_to<float>("1-2", "-1");
-  assert_parsed_expression_evaluates_to<double>("3+I-(4+I)", "-1");
+  assert_parsed_expression_evaluates_to<double>("3+𝐢-(4+𝐢)", "-1");
 
 #if MATRICES_ARE_DEFINED
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]-3", "[[-2,-1][0,1][2,3]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]-(4+I)", "[[-3-I,-2][-1-I,-I][1-I,2-I]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]-(4+𝐢)", "[[-3-𝐢,-2][-1-𝐢,-𝐢][1-𝐢,2-𝐢]]");
   assert_parsed_expression_evaluates_to<float>("3-[[1,2][3,4][5,6]]", "[[2,1][0,-1][-2,-3]]");
-  assert_parsed_expression_evaluates_to<double>("3+I-[[1,2+I][3,4][5,6]]", "[[2+I,1][I,-1+I][-2+I,-3+I]]");
+  assert_parsed_expression_evaluates_to<double>("3+𝐢-[[1,2+𝐢][3,4][5,6]]", "[[2+𝐢,1][𝐢,-1+𝐢][-2+𝐢,-3+𝐢]]");
   assert_parsed_expression_evaluates_to<float>("[[1,2][3,4][5,6]]-[[6,5][4,3][2,1]]", "[[-5,-3][-1,1][3,5]]");
-  assert_parsed_expression_evaluates_to<double>("[[1,2+I][3,4][5,6]]-[[1,2+I][3,4][5,6]]", "[[0,0][0,0][0,0]]");
+  assert_parsed_expression_evaluates_to<double>("[[1,2+𝐢][3,4][5,6]]-[[1,2+𝐢][3,4][5,6]]", "[[0,0][0,0][0,0]]");
 #endif
 }
diff --git a/poincare/test/symbol.cpp b/poincare/test/symbol.cpp
index 2484f36fe..f2532e52f 100644
--- a/poincare/test/symbol.cpp
+++ b/poincare/test/symbol.cpp
@@ -8,17 +8,17 @@
 using namespace Poincare;
 
 QUIZ_CASE(poincare_parse_symbol) {
-  assert_parsed_expression_type("P", ExpressionNode::Type::Constant);
-  assert_parsed_expression_type("X", ExpressionNode::Type::Constant);
-  assert_parsed_expression_type("I", ExpressionNode::Type::Constant);
-  assert_parsed_expression_type("1.2E3", ExpressionNode::Type::Decimal);
+  assert_parsed_expression_type("π", ExpressionNode::Type::Constant);
+  assert_parsed_expression_type("ℯ", ExpressionNode::Type::Constant);
+  assert_parsed_expression_type("𝐢", ExpressionNode::Type::Constant);
+  assert_parsed_expression_type("1.2ᴇ3", ExpressionNode::Type::Decimal);
   assert_parsed_expression_type("ans", ExpressionNode::Type::Symbol);
 }
 
 
 QUIZ_CASE(poincare_symbol_approximate) {
-  assert_parsed_expression_evaluates_to<double>("P", "3.1415926535898");
-  assert_parsed_expression_evaluates_to<float>("X", "2.718282");
-  assert_parsed_expression_evaluates_to<double>("1.2E3", "1200");
+  assert_parsed_expression_evaluates_to<double>("π", "3.1415926535898");
+  assert_parsed_expression_evaluates_to<float>("ℯ", "2.718282");
+  assert_parsed_expression_evaluates_to<double>("1.2ᴇ3", "1200");
 }
 
diff --git a/poincare/test/trigo.cpp b/poincare/test/trigo.cpp
index bef58efdc..50fed6eea 100644
--- a/poincare/test/trigo.cpp
+++ b/poincare/test/trigo.cpp
@@ -26,162 +26,162 @@ QUIZ_CASE(poincare_trigo_evaluate) {
    *      Ri ->  R (even)
    */
   // On R
-  assert_parsed_expression_evaluates_to<double>("cos(2)", "-4.1614683654714E-1", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("cos(2)", "-4.1614683654714ᴇ-1", System, Radian);
   assert_parsed_expression_evaluates_to<double>("cos(2)", "0.9993908270191", System, Degree);
   // Oscillator
-  assert_parsed_expression_evaluates_to<float>("cos(P/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("cos(3*P/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("cos(3*P)", "-1", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cos(π/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("cos(3×π/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cos(3×π)", "-1", System, Radian);
   assert_parsed_expression_evaluates_to<float>("cos(-540)", "-1", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("cos(-2*I)", "3.7621956910836", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("cos(-2*I)", "1.0006092967033", System, Degree);
+  // On R×i
+  assert_parsed_expression_evaluates_to<double>("cos(-2×𝐢)", "3.7621956910836", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("cos(-2×𝐢)", "1.0006092967033", System, Degree);
   // Symmetry: even
-  assert_parsed_expression_evaluates_to<double>("cos(2*I)", "3.7621956910836", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("cos(2*I)", "1.0006092967033", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("cos(2×𝐢)", "3.7621956910836", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("cos(2×𝐢)", "1.0006092967033", System, Degree);
   // On C
-  assert_parsed_expression_evaluates_to<float>("cos(I-4)", "-1.008625-0.8893952*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("cos(I-4)", "0.997716+0.00121754*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("cos(𝐢-4)", "-1.008625-0.8893952×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cos(𝐢-4)", "0.997716+0.00121754×𝐢", System, Degree, Cartesian, 6);
 
   /* sin: R  ->  R (oscillator)
    *      Ri ->  Ri (odd)
    */
   // On R
-  assert_parsed_expression_evaluates_to<double>("sin(2)", "9.0929742682568E-1", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("sin(2)", "3.4899496702501E-2", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("sin(2)", "9.0929742682568ᴇ-1", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("sin(2)", "3.4899496702501ᴇ-2", System, Degree);
   // Oscillator
-  assert_parsed_expression_evaluates_to<float>("sin(P/2)", "1", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("sin(3*P/2)", "-1", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sin(3*P)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sin(π/2)", "1", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("sin(3×π/2)", "-1", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sin(3×π)", "0", System, Radian);
   assert_parsed_expression_evaluates_to<float>("sin(-540)", "0", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("sin(3*I)", "10.01787492741*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sin(3*I)", "0.05238381*I", System, Degree);
+  // On R×i
+  assert_parsed_expression_evaluates_to<double>("sin(3×𝐢)", "10.01787492741×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sin(3×𝐢)", "0.05238381×𝐢", System, Degree);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("sin(-3*I)", "-10.01787492741*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sin(-3*I)", "-0.05238381*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("sin(-3×𝐢)", "-10.01787492741×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sin(-3×𝐢)", "-0.05238381×𝐢", System, Degree);
   // On: C
-  assert_parsed_expression_evaluates_to<float>("sin(I-4)", "1.16781-0.768163*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("sin(I-4)", "-0.0697671+0.0174117*I", System, Degree, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("sin(1.234567890123456E-15)", "1.23457E-15", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("sin(𝐢-4)", "1.16781-0.768163×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("sin(𝐢-4)", "-0.0697671+0.0174117×𝐢", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("sin(1.234567890123456ᴇ-15)", "1.23457ᴇ-15", System, Radian, Cartesian, 6);
 
   /* tan: R  ->  R (tangent-style)
    *      Ri ->  Ri (odd)
    */
   // On R
   assert_parsed_expression_evaluates_to<double>("tan(2)", "-2.1850398632615", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("tan(2)", "3.4920769491748E-2", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("tan(2)", "3.4920769491748ᴇ-2", System, Degree);
   // Tangent-style
-  assert_parsed_expression_evaluates_to<float>("tan(P/2)", Undefined::Name(), System, Radian);
-  assert_parsed_expression_evaluates_to<double>("tan(3*P/2)", Undefined::Name(), System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tan(3*P)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tan(π/2)", Undefined::Name(), System, Radian);
+  assert_parsed_expression_evaluates_to<double>("tan(3×π/2)", Undefined::Name(), System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tan(3×π)", "0", System, Radian);
   assert_parsed_expression_evaluates_to<float>("tan(-540)", "0", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("tan(-2*I)", "-9.6402758007582E-1*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tan(-2*I)", "-0.03489241*I", System, Degree);
+  // On R×i
+  assert_parsed_expression_evaluates_to<double>("tan(-2×𝐢)", "-9.6402758007582ᴇ-1×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tan(-2×𝐢)", "-0.03489241×𝐢", System, Degree);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("tan(2*I)", "9.6402758007582E-1*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tan(2*I)", "0.03489241*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("tan(2×𝐢)", "9.6402758007582ᴇ-1×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tan(2×𝐢)", "0.03489241×𝐢", System, Degree);
   // On C
-  assert_parsed_expression_evaluates_to<float>("tan(I-4)", "-0.273553+1.00281*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("tan(I-4)", "-0.0699054+0.0175368*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("tan(𝐢-4)", "-0.273553+1.00281×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("tan(𝐢-4)", "-0.0699054+0.0175368×𝐢", System, Degree, Cartesian, 6);
 
-  /* acos: [-1,1]    ->  R
-   *       ]-inf,-1[ -> Pi+R*i (odd imaginary)
-   *       ]1, inf[  -> R*i (odd imaginary)
-   *       R*i       -> Pi/2+R*i (odd imaginary)
+  /* acos: [-1,1]    -> R
+   *       ]-inf,-1[ -> π+R×i (odd imaginary)
+   *       ]1, inf[  -> R×i (odd imaginary)
+   *       R×i       -> π/2+R×i (odd imaginary)
    */
   // On [-1, 1]
   assert_parsed_expression_evaluates_to<double>("acos(0.5)", "1.0471975511966", System, Radian);
   assert_parsed_expression_evaluates_to<double>("acos(0.03)", "1.5407918249714", System, Radian);
   assert_parsed_expression_evaluates_to<double>("acos(0.5)", "60", System, Degree);
   // On [1, inf[
-  assert_parsed_expression_evaluates_to<double>("acos(2)", "1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("acos(2)", "75.456129290217*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("acos(2)", "1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("acos(2)", "75.456129290217×𝐢", System, Degree);
   // Symmetry: odd on imaginary
-  assert_parsed_expression_evaluates_to<double>("acos(-2)", "3.1415926535898-1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("acos(-2)", "180-75.456129290217*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("acos(-2)", "3.1415926535898-1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("acos(-2)", "180-75.456129290217×𝐢", System, Degree);
   // On ]-inf, -1[
-  assert_parsed_expression_evaluates_to<double>("acos(-32)", "3.1415926535898-4.1586388532792*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("acos(-32)", "180-238.2725*I", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<float>("acos(3*I)", "1.5708-1.8184*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("acos(3*I)", "90-104.19*I", System, Degree, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<double>("acos(-32)", "3.1415926535898-4.1586388532792×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("acos(-32)", "180-238.2725×𝐢", System, Degree);
+  // On R×i
+  assert_parsed_expression_evaluates_to<float>("acos(3×𝐢)", "1.5708-1.8184×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acos(3×𝐢)", "90-104.19×𝐢", System, Degree, Cartesian, 5);
   // Symmetry: odd on imaginary
-  assert_parsed_expression_evaluates_to<float>("acos(-3*I)", "1.5708+1.8184*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("acos(-3*I)", "90+104.19*I", System, Degree, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acos(-3×𝐢)", "1.5708+1.8184×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acos(-3×𝐢)", "90+104.19×𝐢", System, Degree, Cartesian, 5);
   // On C
-  assert_parsed_expression_evaluates_to<float>("acos(I-4)", "2.8894-2.0966*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("acos(I-4)", "165.551-120.126*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("acos(𝐢-4)", "2.8894-2.0966×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acos(𝐢-4)", "165.551-120.126×𝐢", System, Degree, Cartesian, 6);
   // Key values
   assert_parsed_expression_evaluates_to<double>("acos(0)", "90", System, Degree);
   assert_parsed_expression_evaluates_to<float>("acos(-1)", "180", System, Degree);
   assert_parsed_expression_evaluates_to<double>("acos(1)", "0", System, Degree);
 
-  /* asin: [-1,1]    ->  R
-   *       ]-inf,-1[ -> -Pi/2+R*i (odd)
-   *       ]1, inf[  -> Pi/2+R*i (odd)
-   *       R*i       -> R*i (odd)
+  /* asin: [-1,1]    -> R
+   *       ]-inf,-1[ -> -π/2+R×i (odd)
+   *       ]1, inf[  -> π/2+R×i (odd)
+   *       R×i       -> R×i (odd)
    */
   // On [-1, 1]
   assert_parsed_expression_evaluates_to<double>("asin(0.5)", "0.5235987755983", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("asin(0.03)", "3.0004501823477E-2", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("asin(0.03)", "3.0004501823477ᴇ-2", System, Radian);
   assert_parsed_expression_evaluates_to<double>("asin(0.5)", "30", System, Degree);
   // On [1, inf[
-  assert_parsed_expression_evaluates_to<double>("asin(2)", "1.5707963267949-1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("asin(2)", "90-75.456129290217*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("asin(2)", "1.5707963267949-1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("asin(2)", "90-75.456129290217×𝐢", System, Degree);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("asin(-2)", "-1.5707963267949+1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("asin(-2)", "-90+75.456129290217*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("asin(-2)", "-1.5707963267949+1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("asin(-2)", "-90+75.456129290217×𝐢", System, Degree);
   // On ]-inf, -1[
-  assert_parsed_expression_evaluates_to<float>("asin(-32)", "-1.571+4.159*I", System, Radian, Cartesian, 4);
-  assert_parsed_expression_evaluates_to<float>("asin(-32)", "-90+238*I", System, Degree, Cartesian, 3);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("asin(3*I)", "1.8184464592321*I", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("asin(-32)", "-1.571+4.159×𝐢", System, Radian, Cartesian, 4);
+  assert_parsed_expression_evaluates_to<float>("asin(-32)", "-90+238×𝐢", System, Degree, Cartesian, 3);
+  // On R×i
+  assert_parsed_expression_evaluates_to<double>("asin(3×𝐢)", "1.8184464592321×𝐢", System, Radian);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("asin(-3*I)", "-1.8184464592321*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("asin(-3×𝐢)", "-1.8184464592321×𝐢", System, Radian);
   // On C
-  assert_parsed_expression_evaluates_to<float>("asin(I-4)", "-1.3186+2.0966*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("asin(I-4)", "-75.551+120.13*I", System, Degree, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("asin(𝐢-4)", "-1.3186+2.0966×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("asin(𝐢-4)", "-75.551+120.13×𝐢", System, Degree, Cartesian, 5);
   // Key values
   assert_parsed_expression_evaluates_to<double>("asin(0)", "0", System, Degree);
   assert_parsed_expression_evaluates_to<float>("asin(-1)", "-90", System, Degree);
   assert_parsed_expression_evaluates_to<double>("asin(1)", "90", System, Degree);
 
   /* atan: R         ->  R (odd)
-   *       [-i,i]    ->  R*i (odd)
-   *       ]-inf*i,-i[ -> -Pi/2+R*i (odd)
-   *       ]i, inf*i[  -> Pi/2+R*i (odd)
+   *       [-𝐢,𝐢]    ->  R×𝐢 (odd)
+   *       ]-inf×𝐢,-𝐢[ -> -π/2+R×𝐢 (odd)
+   *       ]𝐢, inf×𝐢[  -> π/2+R×𝐢 (odd)
    */
   // On R
   assert_parsed_expression_evaluates_to<double>("atan(2)", "1.1071487177941", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("atan(0.01)", "9.9996666866652E-3", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(0.01)", "9.9996666866652ᴇ-3", System, Radian);
   assert_parsed_expression_evaluates_to<double>("atan(2)", "63.434948822922", System, Degree);
   assert_parsed_expression_evaluates_to<float>("atan(0.5)", "0.4636476", System, Radian);
   // Symmetry: odd
   assert_parsed_expression_evaluates_to<double>("atan(-2)", "-1.1071487177941", System, Radian);
-  // On [-i, i]
-  assert_parsed_expression_evaluates_to<float>("atan(0.2*I)", "0.202733*I", System, Radian, Cartesian, 6);
+  // On [-𝐢, 𝐢]
+  assert_parsed_expression_evaluates_to<float>("atan(0.2×𝐢)", "0.202733×𝐢", System, Radian, Cartesian, 6);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<float>("atan(-0.2*I)", "-0.202733*I", System, Radian, Cartesian, 6);
-  // On [i, inf*i[
-  assert_parsed_expression_evaluates_to<double>("atan(26*I)", "1.5707963267949+3.8480520568064E-2*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("atan(26*I)", "90+2.2047714220164*I", System, Degree);
+  assert_parsed_expression_evaluates_to<float>("atan(-0.2×𝐢)", "-0.202733×𝐢", System, Radian, Cartesian, 6);
+  // On [𝐢, inf×𝐢[
+  assert_parsed_expression_evaluates_to<double>("atan(26×𝐢)", "1.5707963267949+3.8480520568064ᴇ-2×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(26×𝐢)", "90+2.2047714220164×𝐢", System, Degree);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("atan(-26*I)", "-1.5707963267949-3.8480520568064E-2*I", System, Radian);
-  // On ]-inf*i, -i[
-  assert_parsed_expression_evaluates_to<float>("atan(-3.4*I)", "-1.570796-0.3030679*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atan(-3.4*I)", "-90-17.3645*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<double>("atan(-26×𝐢)", "-1.5707963267949-3.8480520568064ᴇ-2×𝐢", System, Radian);
+  // On ]-inf×𝐢, -𝐢[
+  assert_parsed_expression_evaluates_to<float>("atan(-3.4×𝐢)", "-1.570796-0.3030679×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atan(-3.4×𝐢)", "-90-17.3645×𝐢", System, Degree, Cartesian, 6);
   // On C
-  assert_parsed_expression_evaluates_to<float>("atan(I-4)", "-1.338973+0.05578589*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atan(I-4)", "-76.7175+3.1963*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("atan(𝐢-4)", "-1.338973+0.05578589×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atan(𝐢-4)", "-76.7175+3.1963×𝐢", System, Degree, Cartesian, 6);
   // Key values
   assert_parsed_expression_evaluates_to<float>("atan(0)", "0", System, Degree);
-  assert_parsed_expression_evaluates_to<double>("atan(-I)", "-inf*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("atan(I)", "inf*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(-𝐢)", "-inf×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(𝐢)", "inf×𝐢", System, Radian);
 
   /* cosh: R         -> R (even)
-   *       R*i       -> R (oscillator)
+   *       R×𝐢       -> R (oscillator)
    */
   // On R
   assert_parsed_expression_evaluates_to<double>("cosh(2)", "3.7621956910836", System, Radian);
@@ -189,90 +189,90 @@ QUIZ_CASE(poincare_trigo_evaluate) {
   // Symmetry: even
   assert_parsed_expression_evaluates_to<double>("cosh(-2)", "3.7621956910836", System, Radian);
   assert_parsed_expression_evaluates_to<double>("cosh(-2)", "3.7621956910836", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("cosh(43*I)", "5.5511330152063E-1", System, Radian);
+  // On R×𝐢
+  assert_parsed_expression_evaluates_to<double>("cosh(43×𝐢)", "5.5511330152063ᴇ-1", System, Radian);
   // Oscillator
-  assert_parsed_expression_evaluates_to<float>("cosh(P*I/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("cosh(5*P*I/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("cosh(8*P*I/2)", "1", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("cosh(9*P*I/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cosh(π×𝐢/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cosh(5×π×𝐢/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cosh(8×π×𝐢/2)", "1", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("cosh(9×π×𝐢/2)", "0", System, Radian);
   // On C
-  assert_parsed_expression_evaluates_to<float>("cosh(I-4)", "14.7547-22.9637*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("cosh(I-4)", "14.7547-22.9637*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("cosh(𝐢-4)", "14.7547-22.9637×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("cosh(𝐢-4)", "14.7547-22.9637×𝐢", System, Degree, Cartesian, 6);
 
   /* sinh: R         -> R (odd)
-   *       R*i       -> R*i (oscillator)
+   *       R×𝐢       -> R×𝐢 (oscillator)
    */
   // On R
   assert_parsed_expression_evaluates_to<double>("sinh(2)", "3.626860407847", System, Radian);
   assert_parsed_expression_evaluates_to<double>("sinh(2)", "3.626860407847", System, Degree);
   // Symmetry: odd
   assert_parsed_expression_evaluates_to<double>("sinh(-2)", "-3.626860407847", System, Radian);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("sinh(43*I)", "-0.8317747426286*I", System, Radian);
+  // On R×𝐢
+  assert_parsed_expression_evaluates_to<double>("sinh(43×𝐢)", "-0.8317747426286×𝐢", System, Radian);
   // Oscillator
-  assert_parsed_expression_evaluates_to<float>("sinh(P*I/2)", "I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sinh(5*P*I/2)", "I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sinh(7*P*I/2)", "-I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sinh(8*P*I/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("sinh(9*P*I/2)", "I", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sinh(π×𝐢/2)", "𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sinh(5×π×𝐢/2)", "𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sinh(7×π×𝐢/2)", "-𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sinh(8×π×𝐢/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("sinh(9×π×𝐢/2)", "𝐢", System, Radian);
   // On C
-  assert_parsed_expression_evaluates_to<float>("sinh(I-4)", "-14.7448+22.9791*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("sinh(I-4)", "-14.7448+22.9791*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("sinh(𝐢-4)", "-14.7448+22.9791×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("sinh(𝐢-4)", "-14.7448+22.9791×𝐢", System, Degree, Cartesian, 6);
 
   /* tanh: R         -> R (odd)
-   *       R*i       -> R*i (tangent-style)
+   *       R×𝐢       -> R×𝐢 (tangent-style)
    */
   // On R
-  assert_parsed_expression_evaluates_to<double>("tanh(2)", "9.6402758007582E-1", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("tanh(2)", "9.6402758007582ᴇ-1", System, Radian);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("tanh(-2)", "-9.6402758007582E-1", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("tanh(43*I)", "-1.4983873388552*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("tanh(-2)", "-9.6402758007582ᴇ-1", System, Degree);
+  // On R×i
+  assert_parsed_expression_evaluates_to<double>("tanh(43×𝐢)", "-1.4983873388552×𝐢", System, Radian);
   // Tangent-style
   // FIXME: this depends on the libm implementation and does not work on travis/appveyor servers
-  /*assert_parsed_expression_evaluates_to<float>("tanh(P*I/2)", Undefined::Name(), System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tanh(5*P*I/2)", Undefined::Name(), System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tanh(7*P*I/2)", Undefined::Name(), System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tanh(8*P*I/2)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("tanh(9*P*I/2)", Undefined::Name(), System, Radian);*/
+  /*assert_parsed_expression_evaluates_to<float>("tanh(π×𝐢/2)", Undefined::Name(), System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tanh(5×π×𝐢/2)", Undefined::Name(), System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tanh(7×π×𝐢/2)", Undefined::Name(), System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tanh(8×π×𝐢/2)", "0", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("tanh(9×π×𝐢/2)", Undefined::Name(), System, Radian);*/
   // On C
-  assert_parsed_expression_evaluates_to<float>("tanh(I-4)", "-1.00028+0.000610241*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("tanh(I-4)", "-1.00028+0.000610241*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("tanh(𝐢-4)", "-1.00028+0.000610241×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("tanh(𝐢-4)", "-1.00028+0.000610241×𝐢", System, Degree, Cartesian, 6);
 
-  /* acosh: [-1,1]       ->  R*i
-   *        ]-inf,-1[    -> Pi*i+R (even on real)
+  /* acosh: [-1,1]       -> R×𝐢
+   *        ]-inf,-1[    -> π×𝐢+R (even on real)
    *        ]1, inf[     -> R (even on real)
-   *        ]-inf*i, 0[  -> -Pi/2*i+R (even on real)
-   *        ]0, inf*i[   -> Pi/2*i+R (even on real)
+   *        ]-inf×𝐢, 0[  -> -π/2×𝐢+R (even on real)
+   *        ]0, inf*𝐢[   -> π/2×𝐢+R (even on real)
    */
   // On [-1,1]
   assert_parsed_expression_evaluates_to<double>("acosh(2)", "1.3169578969248", System, Radian);
   assert_parsed_expression_evaluates_to<double>("acosh(2)", "1.3169578969248", System, Degree);
   // On ]-inf, -1[
-  assert_parsed_expression_evaluates_to<double>("acosh(-4)", "2.0634370688956+3.1415926535898*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("acosh(-4)", "2.06344+3.14159*I", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<double>("acosh(-4)", "2.0634370688956+3.1415926535898×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("acosh(-4)", "2.06344+3.14159×𝐢", System, Radian, Cartesian, 6);
   // On ]1,inf[: Symmetry: even on real
   assert_parsed_expression_evaluates_to<double>("acosh(4)", "2.0634370688956", System, Radian);
   assert_parsed_expression_evaluates_to<float>("acosh(4)", "2.063437", System, Radian);
-  // On ]-inf*i, 0[
-  assert_parsed_expression_evaluates_to<double>("acosh(-42*I)", "4.4309584920805-1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("acosh(-42*I)", "4.431-1.571*I", System, Radian, Cartesian, 4);
-  // On ]0, i*inf[: Symmetry: even on real
-  assert_parsed_expression_evaluates_to<double>("acosh(42*I)", "4.4309584920805+1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("acosh(42*I)", "4.431+1.571*I", System, Radian, Cartesian, 4);
+  // On ]-inf×𝐢, 0[
+  assert_parsed_expression_evaluates_to<double>("acosh(-42×𝐢)", "4.4309584920805-1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("acosh(-42×𝐢)", "4.431-1.571×𝐢", System, Radian, Cartesian, 4);
+  // On ]0, 𝐢×inf[: Symmetry: even on real
+  assert_parsed_expression_evaluates_to<double>("acosh(42×𝐢)", "4.4309584920805+1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("acosh(42×𝐢)", "4.431+1.571×𝐢", System, Radian, Cartesian, 4);
   // On C
-  assert_parsed_expression_evaluates_to<float>("acosh(I-4)", "2.0966+2.8894*I", System, Radian, Cartesian, 5);
-  assert_parsed_expression_evaluates_to<float>("acosh(I-4)", "2.0966+2.8894*I", System, Degree, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acosh(𝐢-4)", "2.0966+2.8894×𝐢", System, Radian, Cartesian, 5);
+  assert_parsed_expression_evaluates_to<float>("acosh(𝐢-4)", "2.0966+2.8894×𝐢", System, Degree, Cartesian, 5);
   // Key values
-  //assert_parsed_expression_evaluates_to<double>("acosh(-1)", "3.1415926535898*I", System, Radian);
+  //assert_parsed_expression_evaluates_to<double>("acosh(-1)", "3.1415926535898×𝐢", System, Radian);
   assert_parsed_expression_evaluates_to<double>("acosh(1)", "0", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("acosh(0)", "1.570796*I", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("acosh(0)", "1.570796×𝐢", System, Radian);
 
   /* asinh: R            -> R (odd)
-   *        [-i,i]       ->  R*i (odd)
-   *        ]-inf*i,-i[    -> -Pi/2*i+R (odd)
-   *        ]i, inf*I[     -> Pi/2*I+R (odd)
+   *        [-𝐢,𝐢]       -> R*𝐢 (odd)
+   *        ]-inf×𝐢,-𝐢[  -> -π/2×𝐢+R (odd)
+   *        ]𝐢, inf×𝐢[   -> π/2×𝐢+R (odd)
    */
   // On R
   assert_parsed_expression_evaluates_to<double>("asinh(2)", "1.4436354751788", System, Radian);
@@ -280,26 +280,26 @@ QUIZ_CASE(poincare_trigo_evaluate) {
   // Symmetry: odd
   assert_parsed_expression_evaluates_to<double>("asinh(-2)", "-1.4436354751788", System, Radian);
   assert_parsed_expression_evaluates_to<double>("asinh(-2)", "-1.4436354751788", System, Degree);
-  // On [-i,i]
-  assert_parsed_expression_evaluates_to<double>("asinh(0.2*I)", "2.0135792079033E-1*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("asinh(0.2*I)", "0.2013579*I", System, Degree);
+  // On [-𝐢,𝐢]
+  assert_parsed_expression_evaluates_to<double>("asinh(0.2×𝐢)", "2.0135792079033ᴇ-1×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("asinh(0.2×𝐢)", "0.2013579×𝐢", System, Degree);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("asinh(-0.2*I)", "-2.0135792079033E-1*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("asinh(-0.2*I)", "-0.2013579*I", System, Degree);
-  // On ]-inf*i, -i[
-  assert_parsed_expression_evaluates_to<double>("asinh(-22*I)", "-3.7836727043295-1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("asinh(-22*I)", "-3.784-1.571*I", System, Degree, Cartesian, 4);
-  // On ]i, inf*i[, Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("asinh(22*I)", "3.7836727043295+1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("asinh(22*I)", "3.784+1.571*I", System, Degree, Cartesian, 4);
+  assert_parsed_expression_evaluates_to<double>("asinh(-0.2×𝐢)", "-2.0135792079033ᴇ-1×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("asinh(-0.2×𝐢)", "-0.2013579×𝐢", System, Degree);
+  // On ]-inf×𝐢, -𝐢[
+  assert_parsed_expression_evaluates_to<double>("asinh(-22×𝐢)", "-3.7836727043295-1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("asinh(-22×𝐢)", "-3.784-1.571×𝐢", System, Degree, Cartesian, 4);
+  // On ]𝐢, inf×𝐢[, Symmetry: odd
+  assert_parsed_expression_evaluates_to<double>("asinh(22×𝐢)", "3.7836727043295+1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("asinh(22×𝐢)", "3.784+1.571×𝐢", System, Degree, Cartesian, 4);
   // On C
-  assert_parsed_expression_evaluates_to<float>("asinh(I-4)", "-2.123+0.2383*I", System, Radian, Cartesian, 4);
-  assert_parsed_expression_evaluates_to<float>("asinh(I-4)", "-2.123+0.2383*I", System, Degree, Cartesian, 4);
+  assert_parsed_expression_evaluates_to<float>("asinh(𝐢-4)", "-2.123+0.2383×𝐢", System, Radian, Cartesian, 4);
+  assert_parsed_expression_evaluates_to<float>("asinh(𝐢-4)", "-2.123+0.2383×𝐢", System, Degree, Cartesian, 4);
 
   /* atanh: [-1,1]       -> R (odd)
-   *        ]-inf,-1[    -> Pi/2*i+R (odd)
-   *        ]1, inf[     -> -Pi/2*i+R (odd)
-   *        R*i          -> R*i (odd)
+   *        ]-inf,-1[    -> π/2*𝐢+R (odd)
+   *        ]1, inf[     -> -π/2×𝐢+R (odd)
+   *        R×𝐢          -> R×𝐢 (odd)
    */
   // On [-1,1]
   assert_parsed_expression_evaluates_to<double>("atanh(0.4)", "0.4236489301936", System, Radian);
@@ -308,66 +308,66 @@ QUIZ_CASE(poincare_trigo_evaluate) {
   assert_parsed_expression_evaluates_to<double>("atanh(-0.4)", "-0.4236489301936", System, Radian);
   assert_parsed_expression_evaluates_to<double>("atanh(-0.4)", "-0.4236489301936", System, Degree);
   // On ]1, inf[
-  assert_parsed_expression_evaluates_to<double>("atanh(4)", "0.255412811883-1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atanh(4)", "0.2554128-1.570796*I", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("atanh(4)", "0.255412811883-1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atanh(4)", "0.2554128-1.570796×𝐢", System, Degree);
   // On ]-inf,-1[, Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("atanh(-4)", "-0.255412811883+1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atanh(-4)", "-0.2554128+1.570796*I", System, Degree);
-  // On R*i
-  assert_parsed_expression_evaluates_to<double>("atanh(4*I)", "1.325817663668*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atanh(4*I)", "1.325818*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atanh(-4)", "-0.255412811883+1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atanh(-4)", "-0.2554128+1.570796×𝐢", System, Degree);
+  // On R×𝐢
+  assert_parsed_expression_evaluates_to<double>("atanh(4×𝐢)", "1.325817663668×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atanh(4×𝐢)", "1.325818×𝐢", System, Radian);
   // Symmetry: odd
-  assert_parsed_expression_evaluates_to<double>("atanh(-4*I)", "-1.325817663668*I", System, Radian);
-  assert_parsed_expression_evaluates_to<float>("atanh(-4*I)", "-1.325818*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atanh(-4×𝐢)", "-1.325817663668×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<float>("atanh(-4×𝐢)", "-1.325818×𝐢", System, Radian);
   // On C
-  assert_parsed_expression_evaluates_to<float>("atanh(I-4)", "-0.238878+1.50862*I", System, Radian, Cartesian, 6);
-  assert_parsed_expression_evaluates_to<float>("atanh(I-4)", "-0.238878+1.50862*I", System, Degree, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("atanh(𝐢-4)", "-0.238878+1.50862×𝐢", System, Radian, Cartesian, 6);
+  assert_parsed_expression_evaluates_to<float>("atanh(𝐢-4)", "-0.238878+1.50862×𝐢", System, Degree, Cartesian, 6);
 
   // WARNING: evaluate on branch cut can be multivalued
-  assert_parsed_expression_evaluates_to<double>("acos(2)", "1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("acos(2)", "75.456129290217*I", System, Degree);
-  assert_parsed_expression_evaluates_to<double>("asin(2)", "1.5707963267949-1.3169578969248*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("asin(2)", "90-75.456129290217*I", System, Degree);
-  assert_parsed_expression_evaluates_to<double>("atanh(2)", "5.4930614433405E-1-1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("atan(2I)", "1.5707963267949+5.4930614433405E-1*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("atan(2I)", "90+31.472923730945*I", System, Degree);
-  assert_parsed_expression_evaluates_to<double>("asinh(2I)", "1.3169578969248+1.5707963267949*I", System, Radian);
-  assert_parsed_expression_evaluates_to<double>("acosh(-2)", "1.3169578969248+3.1415926535898*I", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("acos(2)", "1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("acos(2)", "75.456129290217×𝐢", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("asin(2)", "1.5707963267949-1.3169578969248×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("asin(2)", "90-75.456129290217×𝐢", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("atanh(2)", "5.4930614433405ᴇ-1-1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(2𝐢)", "1.5707963267949+5.4930614433405ᴇ-1×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("atan(2𝐢)", "90+31.472923730945×𝐢", System, Degree);
+  assert_parsed_expression_evaluates_to<double>("asinh(2𝐢)", "1.3169578969248+1.5707963267949×𝐢", System, Radian);
+  assert_parsed_expression_evaluates_to<double>("acosh(-2)", "1.3169578969248+3.1415926535898×𝐢", System, Radian);
 }
 
 QUIZ_CASE(poincare_trigo_simplify) {
   // -- sin/cos -> tan
   assert_parsed_expression_simplify_to("sin(x)/cos(x)", "tan(x)");
   assert_parsed_expression_simplify_to("cos(x)/sin(x)", "1/tan(x)");
-  assert_parsed_expression_simplify_to("sin(x)*P/cos(x)", "P*tan(x)");
-  assert_parsed_expression_simplify_to("sin(x)/(P*cos(x))", "tan(x)/P");
-  assert_parsed_expression_simplify_to("1*tan(2)*tan(5)", "tan(2)*tan(5)");
-  assert_parsed_expression_simplify_to("tan(62P/21)", "-tan(P/21)");
-  assert_parsed_expression_simplify_to("cos(26P/21)/sin(25P/17)", "cos((5*P)/21)/sin((8*P)/17)");
-  assert_parsed_expression_simplify_to("cos(62P/21)*P*3/sin(62P/21)", "-(3*P)/tan(P/21)");
-  assert_parsed_expression_simplify_to("cos(62P/21)/(P*3*sin(62P/21))", "-1/(3*P*tan(P/21))");
-  assert_parsed_expression_simplify_to("sin(62P/21)*P*3/cos(62P/21)", "-3*P*tan(P/21)");
-  assert_parsed_expression_simplify_to("sin(62P/21)/(P*3cos(62P/21))", "-tan(P/21)/(3*P)");
-  assert_parsed_expression_simplify_to("-cos(P/62)ln(3)/(sin(P/62)P)", "-ln(3)/(P*tan(P/62))");
-  assert_parsed_expression_simplify_to("-2cos(P/62)ln(3)/(sin(P/62)P)", "-(2*ln(3))/(P*tan(P/62))");
+  assert_parsed_expression_simplify_to("sin(x)×π/cos(x)", "π×tan(x)");
+  assert_parsed_expression_simplify_to("sin(x)/(π×cos(x))", "tan(x)/π");
+  assert_parsed_expression_simplify_to("1×tan(2)×tan(5)", "tan(2)×tan(5)");
+  assert_parsed_expression_simplify_to("tan(62π/21)", "-tan(π/21)");
+  assert_parsed_expression_simplify_to("cos(26π/21)/sin(25π/17)", "cos((5×π)/21)/sin((8×π)/17)");
+  assert_parsed_expression_simplify_to("cos(62π/21)×π×3/sin(62π/21)", "-(3×π)/tan(π/21)");
+  assert_parsed_expression_simplify_to("cos(62π/21)/(π×3×sin(62π/21))", "-1/(3×π×tan(π/21))");
+  assert_parsed_expression_simplify_to("sin(62π/21)×π×3/cos(62π/21)", "-3×π×tan(π/21)");
+  assert_parsed_expression_simplify_to("sin(62π/21)/(π×3cos(62π/21))", "-tan(π/21)/(3×π)");
+  assert_parsed_expression_simplify_to("-cos(π/62)ln(3)/(sin(π/62)π)", "-ln(3)/(π×tan(π/62))");
+  assert_parsed_expression_simplify_to("-2cos(π/62)ln(3)/(sin(π/62)π)", "-(2×ln(3))/(π×tan(π/62))");
   // -- cos
   assert_parsed_expression_simplify_to("cos(0)", "1");
-  assert_parsed_expression_simplify_to("cos(P)", "-1");
-  assert_parsed_expression_simplify_to("cos(P*4/7)", "-cos((3*P)/7)");
-  assert_parsed_expression_simplify_to("cos(P*35/29)", "-cos((6*P)/29)");
-  assert_parsed_expression_simplify_to("cos(-P*35/29)", "-cos((6*P)/29)");
-  assert_parsed_expression_simplify_to("cos(P*340000)", "1");
-  assert_parsed_expression_simplify_to("cos(-P*340001)", "-1");
-  assert_parsed_expression_simplify_to("cos(-P*R(2))", "cos(R(2)*P)");
-  assert_parsed_expression_simplify_to("cos(1311P/6)", "0");
-  assert_parsed_expression_simplify_to("cos(P/12)", "(R(6)+R(2))/4");
-  assert_parsed_expression_simplify_to("cos(-P/12)", "(R(6)+R(2))/4");
-  assert_parsed_expression_simplify_to("cos(-P17/8)", "R(R(2)+2)/2");
-  assert_parsed_expression_simplify_to("cos(41P/6)", "-R(3)/2");
-  assert_parsed_expression_simplify_to("cos(P/4+1000P)", "R(2)/2");
-  assert_parsed_expression_simplify_to("cos(-P/3)", "1/2");
-  assert_parsed_expression_simplify_to("cos(41P/5)", "(R(5)+1)/4");
-  assert_parsed_expression_simplify_to("cos(7P/10)", "-(R(2)*R(-R(5)+5))/4");
+  assert_parsed_expression_simplify_to("cos(π)", "-1");
+  assert_parsed_expression_simplify_to("cos(π×4/7)", "-cos((3×π)/7)");
+  assert_parsed_expression_simplify_to("cos(π×35/29)", "-cos((6×π)/29)");
+  assert_parsed_expression_simplify_to("cos(-π×35/29)", "-cos((6×π)/29)");
+  assert_parsed_expression_simplify_to("cos(π×340000)", "1");
+  assert_parsed_expression_simplify_to("cos(-π×340001)", "-1");
+  assert_parsed_expression_simplify_to("cos(-π×√(2))", "cos(√(2)×π)");
+  assert_parsed_expression_simplify_to("cos(1311π/6)", "0");
+  assert_parsed_expression_simplify_to("cos(π/12)", "(√(6)+√(2))/4");
+  assert_parsed_expression_simplify_to("cos(-π/12)", "(√(6)+√(2))/4");
+  assert_parsed_expression_simplify_to("cos(-π17/8)", "√(√(2)+2)/2");
+  assert_parsed_expression_simplify_to("cos(41π/6)", "-√(3)/2");
+  assert_parsed_expression_simplify_to("cos(π/4+1000π)", "√(2)/2");
+  assert_parsed_expression_simplify_to("cos(-π/3)", "1/2");
+  assert_parsed_expression_simplify_to("cos(41π/5)", "(√(5)+1)/4");
+  assert_parsed_expression_simplify_to("cos(7π/10)", "-(√(2)×√(-√(5)+5))/4");
   assert_parsed_expression_simplify_to("cos(0)", "1", User, Degree);
   assert_parsed_expression_simplify_to("cos(180)", "-1", User, Degree);
   assert_parsed_expression_simplify_to("cos(720/7)", "-cos(540/7)", User, Degree);
@@ -375,35 +375,35 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("cos(-6300/29)", "-cos(1080/29)", User, Degree);
   assert_parsed_expression_simplify_to("cos(61200000)", "1", User, Degree);
   assert_parsed_expression_simplify_to("cos(-61200180)", "-1", User, Degree);
-  assert_parsed_expression_simplify_to("cos(-180*R(2))", "cos(180*R(2))", User, Degree);
+  assert_parsed_expression_simplify_to("cos(-180×√(2))", "cos(180×√(2))", User, Degree);
   assert_parsed_expression_simplify_to("cos(39330)", "0", User, Degree);
-  assert_parsed_expression_simplify_to("cos(15)", "(R(6)+R(2))/4", User, Degree);
-  assert_parsed_expression_simplify_to("cos(-15)", "(R(6)+R(2))/4", User, Degree);
-  assert_parsed_expression_simplify_to("cos(-765/2)", "R(R(2)+2)/2", User, Degree);
-  assert_parsed_expression_simplify_to("cos(7380/6)", "-R(3)/2", User, Degree);
-  assert_parsed_expression_simplify_to("cos(180045)", "R(2)/2", User, Degree);
+  assert_parsed_expression_simplify_to("cos(15)", "(√(6)+√(2))/4", User, Degree);
+  assert_parsed_expression_simplify_to("cos(-15)", "(√(6)+√(2))/4", User, Degree);
+  assert_parsed_expression_simplify_to("cos(-765/2)", "√(√(2)+2)/2", User, Degree);
+  assert_parsed_expression_simplify_to("cos(7380/6)", "-√(3)/2", User, Degree);
+  assert_parsed_expression_simplify_to("cos(180045)", "√(2)/2", User, Degree);
   assert_parsed_expression_simplify_to("cos(-60)", "1/2", User, Degree);
-  assert_parsed_expression_simplify_to("cos(7380/5)", "(R(5)+1)/4", User, Degree);
-  assert_parsed_expression_simplify_to("cos(112.5)", "-R(-R(2)+2)/2", User, Degree);
+  assert_parsed_expression_simplify_to("cos(7380/5)", "(√(5)+1)/4", User, Degree);
+  assert_parsed_expression_simplify_to("cos(112.5)", "-√(-√(2)+2)/2", User, Degree);
   // -- sin
   assert_parsed_expression_simplify_to("sin(0)", "0");
-  assert_parsed_expression_simplify_to("sin(P)", "0");
-  assert_parsed_expression_simplify_to("sin(P*35/29)", "-sin((6*P)/29)");
-  assert_parsed_expression_simplify_to("sin(-P*35/29)", "sin((6*P)/29)");
-  assert_parsed_expression_simplify_to("sin(P*340000)", "0");
-  assert_parsed_expression_simplify_to("sin(P*340001)", "0");
-  assert_parsed_expression_simplify_to("sin(-P*340001)", "0");
-  assert_parsed_expression_simplify_to("sin(P/12)", "(R(6)-R(2))/4");
-  assert_parsed_expression_simplify_to("sin(-P/12)", "(-R(6)+R(2))/4");
-  assert_parsed_expression_simplify_to("sin(-P*R(2))", "-sin(R(2)*P)");
-  assert_parsed_expression_simplify_to("sin(1311P/6)", "1");
-  assert_parsed_expression_simplify_to("sin(-P17/8)", "-R(-R(2)+2)/2");
-  assert_parsed_expression_simplify_to("sin(41P/6)", "1/2");
-  assert_parsed_expression_simplify_to("sin(-3P/10)", "(-R(5)-1)/4");
-  assert_parsed_expression_simplify_to("sin(P/4+1000P)", "R(2)/2");
-  assert_parsed_expression_simplify_to("sin(-P/3)", "-R(3)/2");
-  assert_parsed_expression_simplify_to("sin(17P/5)", "-(R(2)*R(R(5)+5))/4");
-  assert_parsed_expression_simplify_to("sin(P/5)", "(R(2)*R(-R(5)+5))/4");
+  assert_parsed_expression_simplify_to("sin(π)", "0");
+  assert_parsed_expression_simplify_to("sin(π×35/29)", "-sin((6×π)/29)");
+  assert_parsed_expression_simplify_to("sin(-π×35/29)", "sin((6×π)/29)");
+  assert_parsed_expression_simplify_to("sin(π×340000)", "0");
+  assert_parsed_expression_simplify_to("sin(π×340001)", "0");
+  assert_parsed_expression_simplify_to("sin(-π×340001)", "0");
+  assert_parsed_expression_simplify_to("sin(π/12)", "(√(6)-√(2))/4");
+  assert_parsed_expression_simplify_to("sin(-π/12)", "(-√(6)+√(2))/4");
+  assert_parsed_expression_simplify_to("sin(-π×√(2))", "-sin(√(2)×π)");
+  assert_parsed_expression_simplify_to("sin(1311π/6)", "1");
+  assert_parsed_expression_simplify_to("sin(-π17/8)", "-√(-√(2)+2)/2");
+  assert_parsed_expression_simplify_to("sin(41π/6)", "1/2");
+  assert_parsed_expression_simplify_to("sin(-3π/10)", "(-√(5)-1)/4");
+  assert_parsed_expression_simplify_to("sin(π/4+1000π)", "√(2)/2");
+  assert_parsed_expression_simplify_to("sin(-π/3)", "-√(3)/2");
+  assert_parsed_expression_simplify_to("sin(17π/5)", "-(√(2)×√(√(5)+5))/4");
+  assert_parsed_expression_simplify_to("sin(π/5)", "(√(2)×√(-√(5)+5))/4");
   assert_parsed_expression_simplify_to("sin(0)", "0", User, Degree);
   assert_parsed_expression_simplify_to("sin(180)", "0", User, Degree);
   assert_parsed_expression_simplify_to("sin(6300/29)", "-sin(1080/29)", User, Degree);
@@ -411,33 +411,33 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("sin(61200000)", "0", User, Degree);
   assert_parsed_expression_simplify_to("sin(61200180)", "0", User, Degree);
   assert_parsed_expression_simplify_to("sin(-61200180)", "0", User, Degree);
-  assert_parsed_expression_simplify_to("sin(15)", "(R(6)-R(2))/4", User, Degree);
-  assert_parsed_expression_simplify_to("sin(-15)", "(-R(6)+R(2))/4", User, Degree);
-  assert_parsed_expression_simplify_to("sin(-180*R(2))", "-sin(180*R(2))", User, Degree);
+  assert_parsed_expression_simplify_to("sin(15)", "(√(6)-√(2))/4", User, Degree);
+  assert_parsed_expression_simplify_to("sin(-15)", "(-√(6)+√(2))/4", User, Degree);
+  assert_parsed_expression_simplify_to("sin(-180×√(2))", "-sin(180×√(2))", User, Degree);
   assert_parsed_expression_simplify_to("sin(39330)", "1", User, Degree);
-  assert_parsed_expression_simplify_to("sin(-765/2)", "-R(-R(2)+2)/2", User, Degree);
+  assert_parsed_expression_simplify_to("sin(-765/2)", "-√(-√(2)+2)/2", User, Degree);
   assert_parsed_expression_simplify_to("sin(1230)", "1/2", User, Degree);
-  assert_parsed_expression_simplify_to("sin(180045)", "R(2)/2", User, Degree);
-  assert_parsed_expression_simplify_to("sin(-60)", "-R(3)/2", User, Degree);
-  assert_parsed_expression_simplify_to("sin(612)", "-(R(2)*R(R(5)+5))/4", User, Degree);
-  assert_parsed_expression_simplify_to("sin(36)", "(R(2)*R(-R(5)+5))/4", User, Degree);
+  assert_parsed_expression_simplify_to("sin(180045)", "√(2)/2", User, Degree);
+  assert_parsed_expression_simplify_to("sin(-60)", "-√(3)/2", User, Degree);
+  assert_parsed_expression_simplify_to("sin(612)", "-(√(2)×√(√(5)+5))/4", User, Degree);
+  assert_parsed_expression_simplify_to("sin(36)", "(√(2)×√(-√(5)+5))/4", User, Degree);
   // -- tan
   assert_parsed_expression_simplify_to("tan(0)", "0");
-  assert_parsed_expression_simplify_to("tan(P)", "0");
-  assert_parsed_expression_simplify_to("tan(P*35/29)", "tan((6*P)/29)");
-  assert_parsed_expression_simplify_to("tan(-P*35/29)", "-tan((6*P)/29)");
-  assert_parsed_expression_simplify_to("tan(P*340000)", "0");
-  assert_parsed_expression_simplify_to("tan(P*340001)", "0");
-  assert_parsed_expression_simplify_to("tan(-P*340001)", "0");
-  assert_parsed_expression_simplify_to("tan(P/12)", "-R(3)+2");
-  assert_parsed_expression_simplify_to("tan(-P/12)", "R(3)-2");
-  assert_parsed_expression_simplify_to("tan(-P*R(2))", "-tan(R(2)*P)");
-  assert_parsed_expression_simplify_to("tan(1311P/6)", Undefined::Name());
-  assert_parsed_expression_simplify_to("tan(-P17/8)", "-R(2)+1");
-  assert_parsed_expression_simplify_to("tan(41P/6)", "-R(3)/3");
-  assert_parsed_expression_simplify_to("tan(P/4+1000P)", "1");
-  assert_parsed_expression_simplify_to("tan(-P/3)", "-R(3)");
-  assert_parsed_expression_simplify_to("tan(-P/10)", "-(R(5)*R(-2*R(5)+5))/5");
+  assert_parsed_expression_simplify_to("tan(π)", "0");
+  assert_parsed_expression_simplify_to("tan(π×35/29)", "tan((6×π)/29)");
+  assert_parsed_expression_simplify_to("tan(-π×35/29)", "-tan((6×π)/29)");
+  assert_parsed_expression_simplify_to("tan(π×340000)", "0");
+  assert_parsed_expression_simplify_to("tan(π×340001)", "0");
+  assert_parsed_expression_simplify_to("tan(-π×340001)", "0");
+  assert_parsed_expression_simplify_to("tan(π/12)", "-√(3)+2");
+  assert_parsed_expression_simplify_to("tan(-π/12)", "√(3)-2");
+  assert_parsed_expression_simplify_to("tan(-π×√(2))", "-tan(√(2)×π)");
+  assert_parsed_expression_simplify_to("tan(1311π/6)", Undefined::Name());
+  assert_parsed_expression_simplify_to("tan(-π17/8)", "-√(2)+1");
+  assert_parsed_expression_simplify_to("tan(41π/6)", "-√(3)/3");
+  assert_parsed_expression_simplify_to("tan(π/4+1000π)", "1");
+  assert_parsed_expression_simplify_to("tan(-π/3)", "-√(3)");
+  assert_parsed_expression_simplify_to("tan(-π/10)", "-(√(5)×√(-2×√(5)+5))/5");
   assert_parsed_expression_simplify_to("tan(0)", "0", User, Degree);
   assert_parsed_expression_simplify_to("tan(180)", "0", User, Degree);
   assert_parsed_expression_simplify_to("tan(6300/29)", "tan(1080/29)", User, Degree);
@@ -445,25 +445,25 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("tan(61200000)", "0", User, Degree);
   assert_parsed_expression_simplify_to("tan(61200180)", "0", User, Degree);
   assert_parsed_expression_simplify_to("tan(-61200180)", "0", User, Degree);
-  assert_parsed_expression_simplify_to("tan(15)", "-R(3)+2", User, Degree);
-  assert_parsed_expression_simplify_to("tan(-15)", "R(3)-2", User, Degree);
-  assert_parsed_expression_simplify_to("tan(-180*R(2))", "-tan(180*R(2))", User, Degree);
+  assert_parsed_expression_simplify_to("tan(15)", "-√(3)+2", User, Degree);
+  assert_parsed_expression_simplify_to("tan(-15)", "√(3)-2", User, Degree);
+  assert_parsed_expression_simplify_to("tan(-180×√(2))", "-tan(180×√(2))", User, Degree);
   assert_parsed_expression_simplify_to("tan(39330)", Undefined::Name(), User, Degree);
-  assert_parsed_expression_simplify_to("tan(-382.5)", "-R(2)+1", User, Degree);
-  assert_parsed_expression_simplify_to("tan(1230)", "-R(3)/3", User, Degree);
+  assert_parsed_expression_simplify_to("tan(-382.5)", "-√(2)+1", User, Degree);
+  assert_parsed_expression_simplify_to("tan(1230)", "-√(3)/3", User, Degree);
   assert_parsed_expression_simplify_to("tan(180045)", "1", User, Degree);
-  assert_parsed_expression_simplify_to("tan(-60)", "-R(3)", User, Degree);
+  assert_parsed_expression_simplify_to("tan(-60)", "-√(3)", User, Degree);
   assert_parsed_expression_simplify_to("tan(tan(tan(tan(9))))", "tan(tan(tan(tan(9))))");
   // -- acos
-  assert_parsed_expression_simplify_to("acos(-1/2)", "(2*P)/3");
-  assert_parsed_expression_simplify_to("acos(-1.2)", "-acos(6/5)+P");
+  assert_parsed_expression_simplify_to("acos(-1/2)", "(2×π)/3");
+  assert_parsed_expression_simplify_to("acos(-1.2)", "-acos(6/5)+π");
   assert_parsed_expression_simplify_to("acos(cos(2/3))", "2/3");
   assert_parsed_expression_simplify_to("acos(cos(3/2))", "3/2");
   assert_parsed_expression_simplify_to("cos(acos(3/2))", "3/2");
   assert_parsed_expression_simplify_to("cos(acos(2/3))", "2/3");
   assert_parsed_expression_simplify_to("acos(cos(12))", "acos(cos(12))");
-  assert_parsed_expression_simplify_to("acos(cos(4P/7))", "(4*P)/7");
-  assert_parsed_expression_simplify_to("acos(-cos(2))", "P-2");
+  assert_parsed_expression_simplify_to("acos(cos(4π/7))", "(4×π)/7");
+  assert_parsed_expression_simplify_to("acos(-cos(2))", "π-2");
   assert_parsed_expression_simplify_to("acos(-1/2)", "120", User, Degree);
   assert_parsed_expression_simplify_to("acos(-1.2)", "-acos(6/5)+180", User, Degree);
   assert_parsed_expression_simplify_to("acos(cos(2/3))", "2/3", User, Degree);
@@ -474,15 +474,15 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("acos(cos(12))", "12", User, Degree);
   assert_parsed_expression_simplify_to("acos(cos(720/7))", "720/7", User, Degree);
   // -- asin
-  assert_parsed_expression_simplify_to("asin(-1/2)", "-P/6");
+  assert_parsed_expression_simplify_to("asin(-1/2)", "-π/6");
   assert_parsed_expression_simplify_to("asin(-1.2)", "-asin(6/5)");
   assert_parsed_expression_simplify_to("asin(sin(2/3))", "2/3");
   assert_parsed_expression_simplify_to("sin(asin(2/3))", "2/3");
   assert_parsed_expression_simplify_to("sin(asin(3/2))", "3/2");
   assert_parsed_expression_simplify_to("asin(sin(3/2))", "3/2");
   assert_parsed_expression_simplify_to("asin(sin(12))", "asin(sin(12))");
-  assert_parsed_expression_simplify_to("asin(sin(-P/7))", "-P/7");
-  assert_parsed_expression_simplify_to("asin(sin(-R(2)))", "-R(2)");
+  assert_parsed_expression_simplify_to("asin(sin(-π/7))", "-π/7");
+  assert_parsed_expression_simplify_to("asin(sin(-√(2)))", "-√(2)");
   assert_parsed_expression_simplify_to("asin(-1/2)", "-30", User, Degree);
   assert_parsed_expression_simplify_to("asin(-1.2)", "-asin(6/5)", User, Degree);
   assert_parsed_expression_simplify_to("asin(sin(75))", "75", User, Degree);
@@ -492,16 +492,16 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("asin(sin(400))", "40", User, Degree);
   assert_parsed_expression_simplify_to("asin(sin(-180/7))", "-180/7", User, Degree);
   // -- atan
-  assert_parsed_expression_simplify_to("atan(-1)", "-P/4");
+  assert_parsed_expression_simplify_to("atan(-1)", "-π/4");
   assert_parsed_expression_simplify_to("atan(-1.2)", "-atan(6/5)");
   assert_parsed_expression_simplify_to("atan(tan(2/3))", "2/3");
   assert_parsed_expression_simplify_to("tan(atan(2/3))", "2/3");
   assert_parsed_expression_simplify_to("tan(atan(5/2))", "5/2");
   assert_parsed_expression_simplify_to("atan(tan(5/2))", "atan(tan(5/2))");
   assert_parsed_expression_simplify_to("atan(tan(5/2))", "atan(tan(5/2))");
-  assert_parsed_expression_simplify_to("atan(tan(-P/7))", "-P/7");
-  assert_parsed_expression_simplify_to("atan(R(3))", "P/3");
-  assert_parsed_expression_simplify_to("atan(tan(-R(2)))", "-R(2)");
+  assert_parsed_expression_simplify_to("atan(tan(-π/7))", "-π/7");
+  assert_parsed_expression_simplify_to("atan(√(3))", "π/3");
+  assert_parsed_expression_simplify_to("atan(tan(-√(2)))", "-√(2)");
   assert_parsed_expression_simplify_to("atan(-1)", "-45", User, Degree);
   assert_parsed_expression_simplify_to("atan(-1.2)", "-atan(6/5)", User, Degree);
   assert_parsed_expression_simplify_to("atan(tan(-45))", "-45", User, Degree);
@@ -510,25 +510,25 @@ QUIZ_CASE(poincare_trigo_simplify) {
   assert_parsed_expression_simplify_to("atan(tan(2293))", "-47", User, Degree);
   assert_parsed_expression_simplify_to("atan(tan(1808))", "8", User, Degree);
   assert_parsed_expression_simplify_to("atan(tan(-180/7))", "-180/7", User, Degree);
-  assert_parsed_expression_simplify_to("atan(R(3))", "60", User, Degree);
-  assert_parsed_expression_simplify_to("atan(1/x)", "(P*sign(x)-2*atan(x))/2", User, Degree);
+  assert_parsed_expression_simplify_to("atan(√(3))", "60", User, Degree);
+  assert_parsed_expression_simplify_to("atan(1/x)", "(π×sign(x)-2×atan(x))/2", User, Degree);
 
   // cos(arcsin)
-  assert_parsed_expression_simplify_to("cos(asin(x))", "R(-x^2+1)", User, Degree);
-  assert_parsed_expression_simplify_to("cos(asin(-x))", "R(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("cos(asin(x))", "√(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("cos(asin(-x))", "√(-x^2+1)", User, Degree);
   // cos(arctan)
-  assert_parsed_expression_simplify_to("cos(atan(x))", "1/R(x^2+1)", User, Degree);
-  assert_parsed_expression_simplify_to("cos(atan(-x))", "1/R(x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("cos(atan(x))", "1/√(x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("cos(atan(-x))", "1/√(x^2+1)", User, Degree);
   // sin(arccos)
-  assert_parsed_expression_simplify_to("sin(acos(x))", "R(-x^2+1)", User, Degree);
-  assert_parsed_expression_simplify_to("sin(acos(-x))", "R(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("sin(acos(x))", "√(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("sin(acos(-x))", "√(-x^2+1)", User, Degree);
   // sin(arctan)
-  assert_parsed_expression_simplify_to("sin(atan(x))", "x/R(x^2+1)", User, Degree);
-  assert_parsed_expression_simplify_to("sin(atan(-x))", "-x/R(x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("sin(atan(x))", "x/√(x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("sin(atan(-x))", "-x/√(x^2+1)", User, Degree);
   // tan(arccos)
-  assert_parsed_expression_simplify_to("tan(acos(x))", "R(-x^2+1)/x", User, Degree);
-  assert_parsed_expression_simplify_to("tan(acos(-x))", "-R(-x^2+1)/x", User, Degree);
+  assert_parsed_expression_simplify_to("tan(acos(x))", "√(-x^2+1)/x", User, Degree);
+  assert_parsed_expression_simplify_to("tan(acos(-x))", "-√(-x^2+1)/x", User, Degree);
   // tan(arcsin)
-  assert_parsed_expression_simplify_to("tan(asin(x))", "x/R(-x^2+1)", User, Degree);
-  assert_parsed_expression_simplify_to("tan(asin(-x))", "-x/R(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("tan(asin(x))", "x/√(-x^2+1)", User, Degree);
+  assert_parsed_expression_simplify_to("tan(asin(-x))", "-x/√(-x^2+1)", User, Degree);
 }
diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index 8e336d245..7a235103c 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -8,26 +8,26 @@ using namespace Poincare;
 
 QUIZ_CASE(poincare_user_variable_simple) {
   // Fill variable
-  assert_parsed_expression_simplify_to("1+2>Adadas", "3");
+  assert_parsed_expression_simplify_to("1+2→Adadas", "3");
   assert_parsed_expression_simplify_to("Adadas", "3");
 
   // Fill f1
-  assert_parsed_expression_simplify_to("1+x>f1(x)", "x+1");
+  assert_parsed_expression_simplify_to("1+x→f1(x)", "x+1");
   assert_parsed_expression_simplify_to("f1(4)", "5");
   assert_parsed_expression_simplify_to("f1(Adadas)", "4");
 
   // Fill f2
-  assert_parsed_expression_simplify_to("x-1>f2(x)", "x-1");
+  assert_parsed_expression_simplify_to("x-1→f2(x)", "x-1");
   assert_parsed_expression_simplify_to("f2(4)", "3");
   assert_parsed_expression_simplify_to("f2(Adadas)", "2");
 
   // Define fBoth with f1 and f2
-  assert_parsed_expression_simplify_to("f1(x)+f2(x)>fBoth(x)", "2*x");
+  assert_parsed_expression_simplify_to("f1(x)+f2(x)→fBoth(x)", "2×x");
   assert_parsed_expression_simplify_to("fBoth(4)", "8");
   assert_parsed_expression_simplify_to("fBoth(Adadas)", "6");
 
   // Change f2
-  assert_parsed_expression_simplify_to("x>f2(x)", "x");
+  assert_parsed_expression_simplify_to("x→f2(x)", "x");
   assert_parsed_expression_simplify_to("f2(4)", "4");
   assert_parsed_expression_simplify_to("f2(Adadas)", "3");
 
@@ -43,8 +43,8 @@ QUIZ_CASE(poincare_user_variable_simple) {
 }
 
 QUIZ_CASE(poincare_user_variable_2_circular_variables) {
-  assert_simplify("a>b");
-  assert_simplify("b>a");
+  assert_simplify("a→b");
+  assert_simplify("b→a");
   assert_parsed_expression_evaluates_to<double>("a", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("b", Undefined::Name());
 
@@ -54,9 +54,9 @@ QUIZ_CASE(poincare_user_variable_2_circular_variables) {
 }
 
 QUIZ_CASE(poincare_user_variable_3_circular_variables) {
-  assert_simplify("a>b");
-  assert_simplify("b>c");
-  assert_simplify("c>a");
+  assert_simplify("a→b");
+  assert_simplify("b→c");
+  assert_simplify("c→a");
   assert_parsed_expression_evaluates_to<double>("a", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("b", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("c", Undefined::Name());
@@ -68,15 +68,15 @@ QUIZ_CASE(poincare_user_variable_3_circular_variables) {
 }
 
 QUIZ_CASE(poincare_user_variable_1_circular_function) {
-  // g: x -> f(x)+1
-  assert_simplify("f(x)+1>g(x)");
+  // g: x → f(x)+1
+  assert_simplify("f(x)+1→g(x)");
   assert_parsed_expression_evaluates_to<double>("g(1)", Undefined::Name());
-  // f: x -> x+1
-  assert_simplify("x+1>f(x)");
+  // f: x → x+1
+  assert_simplify("x+1→f(x)");
   assert_parsed_expression_evaluates_to<double>("g(1)", "3");
   assert_parsed_expression_evaluates_to<double>("f(1)", "2");
-  // h: x -> h(x)
-  assert_simplify("h(x)>h(x)");
+  // h: x → h(x)
+  assert_simplify("h(x)→h(x)");
   assert_parsed_expression_evaluates_to<double>("f(1)", "2");
   assert_parsed_expression_evaluates_to<double>("g(1)", "3");
   assert_parsed_expression_evaluates_to<double>("h(1)", Undefined::Name());
@@ -88,8 +88,8 @@ QUIZ_CASE(poincare_user_variable_1_circular_function) {
 }
 
 QUIZ_CASE(poincare_user_variable_2_circular_functions) {
-  assert_simplify("f(x)>g(x)");
-  assert_simplify("g(x)>f(x)");
+  assert_simplify("f(x)→g(x)");
+  assert_simplify("g(x)→f(x)");
   assert_parsed_expression_evaluates_to<double>("f(1)", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("g(1)", Undefined::Name());
 
@@ -99,9 +99,9 @@ QUIZ_CASE(poincare_user_variable_2_circular_functions) {
 }
 
 QUIZ_CASE(poincare_user_variable_3_circular_functions) {
-  assert_simplify("f(x)>g(x)");
-  assert_simplify("g(x)>h(x)");
-  assert_simplify("h(x)>f(x)");
+  assert_simplify("f(x)→g(x)");
+  assert_simplify("g(x)→h(x)");
+  assert_simplify("h(x)→f(x)");
   assert_parsed_expression_evaluates_to<double>("f(1)", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("g(1)", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("h(1)", Undefined::Name());
@@ -113,9 +113,9 @@ QUIZ_CASE(poincare_user_variable_3_circular_functions) {
 }
 
 QUIZ_CASE(poincare_user_variable_circular_variables_and_functions) {
-  assert_simplify("a>b");
-  assert_simplify("b>a");
-  assert_simplify("a>f(x)");
+  assert_simplify("a→b");
+  assert_simplify("b→a");
+  assert_simplify("a→f(x)");
   assert_parsed_expression_evaluates_to<double>("f(1)", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("a", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("b", Undefined::Name());
@@ -127,22 +127,22 @@ QUIZ_CASE(poincare_user_variable_circular_variables_and_functions) {
 }
 
 QUIZ_CASE(poincare_user_variable_composed_functions) {
-  // f: x->x^2
-  assert_simplify("x^2>f(x)");
-  // g: x->f(x-2)
-  assert_simplify("f(x-2)>g(x)");
+  // f: x→x^2
+  assert_simplify("x^2→f(x)");
+  // g: x→f(x-2)
+  assert_simplify("f(x-2)→g(x)");
   assert_parsed_expression_evaluates_to<double>("f(2)", "4");
   assert_parsed_expression_evaluates_to<double>("g(3)", "1");
   assert_parsed_expression_evaluates_to<double>("g(5)", "9");
 
-  // g: x->f(x-2)+f(x+1)
-  assert_simplify("f(x-2)+f(x+1)>g(x)");
+  // g: x→f(x-2)+f(x+1)
+  assert_simplify("f(x-2)+f(x+1)→g(x)");
   // Add a matrix to bypass simplification
   assert_parsed_expression_evaluates_to<double>("g(3)+[[1]]", "[[18]]");
   assert_parsed_expression_evaluates_to<double>("g(5)", "45");
 
-  // g: x->x+1
-  assert_simplify("x+1>g(x)");
+  // g: x→x+1
+  assert_simplify("x+1→g(x)");
   assert_parsed_expression_evaluates_to<double>("f(g(4))", "25");
   // Add a matrix to bypass simplification
   assert_parsed_expression_evaluates_to<double>("f(g(4))+[[1]]", "[[26]]");
@@ -153,8 +153,8 @@ QUIZ_CASE(poincare_user_variable_composed_functions) {
 }
 
 QUIZ_CASE(poincare_user_variable_functions_with_context) {
-  // f: x->x^2
-  assert_simplify("x^2>f(x)");
+  // f : x→ x^2
+  assert_simplify("x^2→f(x)");
   // Approximate f(?-2) with ? = 5
   const char x[] = {Symbol::SpecialSymbols::UnknownX, 0};
   assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Rational::Builder(2))), x, 5.0, 9.0);
@@ -164,12 +164,12 @@ QUIZ_CASE(poincare_user_variable_functions_with_context) {
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 
-  // f: x->R(-1)
-  assert_simplify("R(-1)*R(-1)>f(x)");
+  // f : x → √(-1)
+  assert_simplify("√(-1)×√(-1)→f(x)");
   // Approximate f(?) with ? = 5
   // Cartesian
   assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(Symbol::SpecialSymbols::UnknownX)), x, 1.0, -1.0);
-    // Real
+  // Real
   assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(Symbol::SpecialSymbols::UnknownX)), x, 1.0, (double)NAN, Real);
 
   // Clean the storage for other tests
@@ -179,14 +179,15 @@ QUIZ_CASE(poincare_user_variable_functions_with_context) {
 QUIZ_CASE(poincare_user_variable_properties) {
   Shared::GlobalContext context;
 
-  assert_parsed_expression_evaluates_to<double>("[[1]]>a", "[[1]]");
+  assert_parsed_expression_evaluates_to<double>("[[1]]→a", "[[1]]");
   quiz_assert(Symbol::Builder('a').isApproximate(context));
   quiz_assert(Poincare::Expression::IsMatrix(Symbol::Builder('a'), context, true));
 
-  /* [[x]]->f(x) expression contains a matrix, so its simplification is going
+  /* [[x]]→f(x) expression contains a matrix, so its simplification is going
    * to be interrupted. We thus rather approximate it instead of simplifying it.
    * TODO: use parse_and_simplify when matrix are simplified. */
-  assert_parsed_expression_evaluates_to<double>("[[x]]>f(x)", "[[undef]]");
+
+  assert_parsed_expression_evaluates_to<double>("[[x]]→f(x)", "[[undef]]");
   quiz_assert(Function::Builder("f", 1, Rational::Builder(2)).isApproximate(context));
   quiz_assert(Poincare::Expression::IsMatrix(Function::Builder("f", 1, Symbol::Builder('x')), context, true));
 
diff --git a/poincare/test/vertical_offset_layout.cpp b/poincare/test/vertical_offset_layout.cpp
index 72bc3ae09..1c1846140 100644
--- a/poincare/test/vertical_offset_layout.cpp
+++ b/poincare/test/vertical_offset_layout.cpp
@@ -14,5 +14,7 @@ QUIZ_CASE(poincare_vertical_offset_layout_serialize) {
         VerticalOffsetLayoutNode::Type::Superscript
       )
     );
-  assert_expression_layout_serialize_to(layout, "2$x+5#");
+  assert(KDCodePointLeftSuperscript == '\x12');
+  assert(KDCodePointRightSuperscript == '\x13');
+  assert_expression_layout_serialize_to(layout, "2\x12x+5\x13");
 }

From bbb10f19930be42ce300f150386bfdcb2383955d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 11:00:33 +0100
Subject: [PATCH 039/295] [ion/kandinsky] Move unicode to ion

---
 apps/code/helpers.cpp                         |  4 +-
 apps/code/script_node_cell.h                  |  2 +-
 .../graph/graph/integral_graph_controller.cpp |  2 +-
 apps/regression/model/cubic_model.cpp         |  6 +--
 apps/regression/model/exponential_model.cpp   |  4 +-
 apps/regression/model/linear_model.cpp        |  2 +-
 apps/regression/model/logarithmic_model.cpp   |  2 +-
 apps/regression/model/logistic_model.cpp      |  4 +-
 apps/regression/model/power_model.cpp         |  2 +-
 apps/regression/model/quadratic_model.cpp     |  4 +-
 apps/regression/model/quartic_model.cpp       |  8 +--
 apps/regression/model/trigonometric_model.cpp |  4 +-
 apps/sequence/graph/term_sum_controller.cpp   |  2 +-
 apps/shared/storage_sum_graph_controller.cpp  |  2 +-
 apps/shared/sum_graph_controller.cpp          |  2 +-
 apps/shared/text_field_delegate_app.cpp       |  2 +-
 apps/shared/toolbox_helpers.cpp               |  6 +--
 apps/solver/equation.cpp                      |  4 +-
 apps/solver/equation_store.cpp                |  2 +-
 apps/solver/test/equation_store.cpp           |  8 +--
 apps/variable_box_controller.cpp              |  4 +-
 escher/include/escher/editable_field.h        |  2 +-
 escher/src/layout_field.cpp                   |  2 +-
 escher/src/text_area.cpp                      |  6 +--
 escher/src/text_field.cpp                     |  8 +--
 escher/src/text_input_helpers.cpp             |  6 +--
 ion/Makefile                                  |  3 ++
 ion/include/ion/unicode/code_point.h          | 53 +++++++++++++++++++
 .../include/ion}/unicode/utf8_decoder.h       |  4 +-
 .../include/ion}/unicode/utf8_helper.h        |  4 +-
 ion/src/shared/events.cpp                     |  4 +-
 .../src/shared}/unicode/utf8_decoder.cpp      |  2 +-
 .../src/shared}/unicode/utf8_helper.cpp       |  6 +--
 ion/test/utf8_decoder.cpp                     | 15 ++++++
 kandinsky/Makefile                            |  3 --
 kandinsky/include/kandinsky/font.h            |  2 +-
 .../include/kandinsky/unicode/code_point.h    | 53 -------------------
 kandinsky/src/context_text.cpp                |  8 +--
 kandinsky/src/font.cpp                        |  8 +--
 poincare/include/poincare/code_point_layout.h |  4 +-
 poincare/include/poincare/constant.h          |  6 +--
 poincare/include/poincare/layout_node.h       |  2 +-
 .../include/poincare/serialization_helper.h   |  2 +-
 poincare/src/code_point_layout.cpp            |  8 +--
 poincare/src/complex_argument.cpp             |  2 +-
 poincare/src/complex_cartesian.cpp            |  6 +--
 poincare/src/constant.cpp                     | 12 ++---
 poincare/src/decimal.cpp                      |  2 +-
 poincare/src/empty_expression.cpp             |  2 +-
 poincare/src/expression.cpp                   | 18 +++----
 poincare/src/expression_debug.cpp             |  6 +--
 poincare/src/fraction_layout.cpp              |  4 +-
 poincare/src/layout_cursor.cpp                | 16 +++---
 poincare/src/layout_helper.cpp                |  4 +-
 poincare/src/logarithm.cpp                    |  2 +-
 poincare/src/multiplication.cpp               |  4 +-
 poincare/src/naperian_logarithm.cpp           |  2 +-
 poincare/src/nth_root_layout.cpp              |  2 +-
 poincare/src/parsing/parser.cpp               |  2 +-
 poincare/src/parsing/token.h                  |  2 +-
 poincare/src/parsing/tokenizer.cpp            | 26 ++++-----
 poincare/src/parsing/tokenizer.h              |  4 +-
 poincare/src/power.cpp                        | 12 ++---
 poincare/src/print_float.cpp                  |  2 +-
 poincare/src/serialization_helper.cpp         |  2 +-
 poincare/src/store.cpp                        |  4 +-
 poincare/src/trigonometry.cpp                 |  4 +-
 poincare/src/vertical_offset_layout.cpp       |  6 +--
 poincare/test/expression_order.cpp            | 14 ++---
 poincare/test/layouts.cpp                     |  6 +--
 poincare/test/parser.cpp                      | 10 ++--
 poincare/test/vertical_offset_layout.cpp      |  4 +-
 72 files changed, 241 insertions(+), 226 deletions(-)
 create mode 100644 ion/include/ion/unicode/code_point.h
 rename {kandinsky/include/kandinsky => ion/include/ion}/unicode/utf8_decoder.h (93%)
 rename {kandinsky/include/kandinsky => ion/include/ion}/unicode/utf8_helper.h (84%)
 rename {kandinsky/src => ion/src/shared}/unicode/utf8_decoder.cpp (98%)
 rename {kandinsky/src => ion/src/shared}/unicode/utf8_helper.cpp (91%)
 create mode 100644 ion/test/utf8_decoder.cpp
 delete mode 100644 kandinsky/include/kandinsky/unicode/code_point.h

diff --git a/apps/code/helpers.cpp b/apps/code/helpers.cpp
index 8a9735de4..5634dbf67 100644
--- a/apps/code/helpers.cpp
+++ b/apps/code/helpers.cpp
@@ -1,6 +1,6 @@
 #include "helpers.h"
 #include <string.h>
-#include <kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 #include <ion.h>
 
 namespace Code {
@@ -16,7 +16,7 @@ private:
   const char * m_text;
 };
 
-static_assert('\x11' == KDCodePointEmpty, "Unicode error");
+static_assert('\x11' == UCodePointEmpty, "Unicode error");
 static constexpr EventTextPair sEventTextMap[] = {
   EventTextPair(Ion::Events::XNT, "x"),
   EventTextPair(Ion::Events::Exp, "exp(\x11)"),
diff --git a/apps/code/script_node_cell.h b/apps/code/script_node_cell.h
index 29e9f8bbf..c4d7651b7 100644
--- a/apps/code/script_node_cell.h
+++ b/apps/code/script_node_cell.h
@@ -22,7 +22,7 @@ public:
   void reloadCell() override;
   const char * text() const override { return m_scriptNodeView.text(); }
 
-  static_assert('\x11' == KDCodePointEmpty, "Unicode error");
+  static_assert('\x11' == UCodePointEmpty, "Unicode error");
   constexpr static char k_parentheses[] = "()";
   constexpr static char k_parenthesesWithEmpty[] = "(\x11)";
 
diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index 6dc3fe6bd..f07eac2dd 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -13,7 +13,7 @@ using namespace Poincare;
 namespace Graph {
 
 IntegralGraphController::IntegralGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, KDCodePointIntegral)
+  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointIntegral)
 {
 }
 
diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index e8bbc5734..acdbb4ee6 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -21,7 +21,7 @@ Layout CubicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout CubicModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -37,7 +37,7 @@ Layout CubicModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('d', KDFont::SmallFont),
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index a5f5b937f..936474e89 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -13,12 +13,12 @@ Layout ExponentialModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(
             CodePointLayout::Builder('b', KDFont::SmallFont),
-            CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+            CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
             CodePointLayout::Builder('X', KDFont::SmallFont)
           ),
           VerticalOffsetLayoutNode::Type::Superscript
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index 15b811181..46d85d837 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -13,7 +13,7 @@ Layout LinearModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
diff --git a/apps/regression/model/logarithmic_model.cpp b/apps/regression/model/logarithmic_model.cpp
index c0402bac9..b149f141b 100644
--- a/apps/regression/model/logarithmic_model.cpp
+++ b/apps/regression/model/logarithmic_model.cpp
@@ -13,7 +13,7 @@ Layout LogarithmicModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('l', KDFont::SmallFont),
       CodePointLayout::Builder('n', KDFont::SmallFont),
       CodePointLayout::Builder('(', KDFont::SmallFont),
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index f7744f916..4ceef4949 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -15,14 +15,14 @@ Layout LogisticModel::layout() {
     Layout exponentLayoutChildren[] = {
       CodePointLayout::Builder('-', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont)
     };
     Layout layoutChildren[] = {
       CodePointLayout::Builder('1', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(exponentLayoutChildren, 4),
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index 2241eb4fa..00a2a83c8 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -14,7 +14,7 @@ Layout PowerModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('b', KDFont::SmallFont),
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index feaf176e6..e3691c734 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -21,7 +21,7 @@ Layout QuadraticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout QuadraticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 710bb970a..3be41332b 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -21,7 +21,7 @@ Layout QuarticModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('4', KDFont::SmallFont),
@@ -29,7 +29,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', KDFont::SmallFont),
@@ -37,7 +37,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', KDFont::SmallFont),
@@ -45,7 +45,7 @@ Layout QuarticModel::layout() {
         ),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('d', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
diff --git a/apps/regression/model/trigonometric_model.cpp b/apps/regression/model/trigonometric_model.cpp
index 46ba81386..9f40724df 100644
--- a/apps/regression/model/trigonometric_model.cpp
+++ b/apps/regression/model/trigonometric_model.cpp
@@ -22,13 +22,13 @@ Layout TrigonometricModel::layout() {
   if (m_layout.isUninitialized()) {
     Layout layoutChildren[] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('s', KDFont::SmallFont),
       CodePointLayout::Builder('i', KDFont::SmallFont),
       CodePointLayout::Builder('n', KDFont::SmallFont),
       CodePointLayout::Builder('(', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(KDCodePointMiddleDot, KDFont::SmallFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index aa636e422..8f7a99e5f 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -18,7 +18,7 @@ using namespace Poincare;
 namespace Sequence {
 
 TermSumController::TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
-  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, KDCodePointNArySummation)
+  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
 {
 }
 
diff --git a/apps/shared/storage_sum_graph_controller.cpp b/apps/shared/storage_sum_graph_controller.cpp
index 7582995f6..ad351a459 100644
--- a/apps/shared/storage_sum_graph_controller.cpp
+++ b/apps/shared/storage_sum_graph_controller.cpp
@@ -235,7 +235,7 @@ void StorageSumGraphController::LegendView::setEditableZone(double d) {
 void StorageSumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
   constexpr int sigmaLength = 2;
-  const CodePoint sigma[sigmaLength] = {KDCodePointSpace, m_sumSymbol};
+  const CodePoint sigma[sigmaLength] = {UCodePointSpace, m_sumSymbol};
   if (step == Step::FirstParameter) {
     m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaLength);
   } else if (step == Step::SecondParameter) {
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index e45984d5b..12e4d222d 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -234,7 +234,7 @@ void SumGraphController::LegendView::setEditableZone(double d) {
 void SumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
   constexpr int sigmaSize = 2;
-  const CodePoint sigma[sigmaSize] = {KDCodePointSpace, m_sumSymbol};
+  const CodePoint sigma[sigmaSize] = {UCodePointSpace, m_sumSymbol};
   if (step == Step::FirstParameter) {
     m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaSize);
   } else if (step == Step::SecondParameter) {
diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index 94aacf698..d7b2d2582 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -1,5 +1,5 @@
 #include "text_field_delegate_app.h"
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <apps/apps_container.h>
 #include <apps/constant.h>
 #include <apps/shared/poincare_helpers.h>
diff --git a/apps/shared/toolbox_helpers.cpp b/apps/shared/toolbox_helpers.cpp
index 10fb4a95b..6ae393c1d 100644
--- a/apps/shared/toolbox_helpers.cpp
+++ b/apps/shared/toolbox_helpers.cpp
@@ -1,6 +1,6 @@
 #include "toolbox_helpers.h"
 #include <apps/i18n.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
@@ -13,7 +13,7 @@ int CursorIndexInCommandText(const char * text) {
   const char * currentPointer = text;
   CodePoint codePoint = decoder.nextCodePoint();
   const char * nextPointer = decoder.stringPosition();
-  while (codePoint != KDCodePointNull) {
+  while (codePoint != UCodePointNull) {
     if (codePoint == '(' || codePoint == '\'') {
       return index + 1;
     }
@@ -57,7 +57,7 @@ void TextToInsertForCommandText(const char * command, char * buffer, int bufferS
       buffer[currentNewTextIndex++] = command[i];
     } else {
       if (replaceArgsWithEmptyChar && !argumentAlreadyReplaced) {
-        currentNewTextIndex += UTF8Decoder::CodePointToChars(KDCodePointEmpty, buffer + currentNewTextIndex, bufferSize - currentNewTextIndex);
+        currentNewTextIndex += UTF8Decoder::CodePointToChars(UCodePointEmpty, buffer + currentNewTextIndex, bufferSize - currentNewTextIndex);
         argumentAlreadyReplaced = true;
       }
     }
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 8f9d4aa7e..df6212056 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -3,7 +3,7 @@
 #include <poincare/undefined.h>
 #include <poincare/unreal.h>
 #include <poincare/rational.h>
-#include <kandinsky/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_helper.h>
 
 using namespace Poincare;
 
@@ -50,7 +50,7 @@ Expression Equation::standardForm(Context * context) const {
 }
 
 bool Equation::containsIComplex() const {
-  return UTF8Helper::CodePointSearch(text(), KDCodePointMathematicalBoldSmallI) != nullptr;
+  return UTF8Helper::CodePointSearch(text(), UCodePointMathematicalBoldSmallI) != nullptr;
 }
 
 void Equation::tidyStandardForm() {
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index c629302a3..aabf245a2 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -325,7 +325,7 @@ EquationStore::Error EquationStore::oneDimensialPolynomialSolve(Expression exact
       // C = Root((delta1+sqrt(-27a^2*delta))/2, 3)
       Expression * mult11Operands[3] = {new Rational::Builder(-27), new Power::Builder(a->clone(), new Rational::Builder(2), false), (*delta)->clone()};
       Expression * c = new Power::Builder(new Division::Builder(new Addition(delta1, new SquareRoot(new Multiplication::Builder(mult11Operands, 3, false), false), false), new Rational::Builder(2), false), new Rational::Builder(1,3), false);
-      Expression * unary3roots[2] = {new Addition(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(KDCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false), new Subtraction::Builder(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(KDCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false)};
+      Expression * unary3roots[2] = {new Addition(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(UCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false), new Subtraction::Builder(new Rational::Builder(-1,2), new Division::Builder(new Multiplication::Builder(new SquareRoot(new Rational::Builder(3), false), new Constant::Builder(UCodePointMathematicalBoldSmallI), false), new Rational::Builder(2), false), false)};
       // x_k = -1/(3a)*(b+C*z+delta0/(zC)) with z = unary cube root
       for (int k = 0; k < 3; k++) {
         Expression * ccopy = c;
diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index bd86b7569..3849d2ad6 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -112,10 +112,10 @@ QUIZ_CASE(equation_solve) {
   const char * solutions10[] = {"1", "0"};
   assert_equation_system_exact_solve_to(equations10, EquationStore::Error::NoError, EquationStore::Type::PolynomialMonovariable, (const char **)variablesx, solutions10, 2);
 
-  quiz_assert(KDCodePointLeftSuperscript == '\022');
-  quiz_assert(KDCodePointLeftSuperscript == '\x12');
-  quiz_assert(KDCodePointRightSuperscript == '\023');
-  quiz_assert(KDCodePointRightSuperscript == '\x13');
+  quiz_assert(UCodePointLeftSuperscript == '\022');
+  quiz_assert(UCodePointLeftSuperscript == '\x12');
+  quiz_assert(UCodePointRightSuperscript == '\023');
+  quiz_assert(UCodePointRightSuperscript == '\x13');
 
   // x^2+x+1=3×x^2+pi×x-√(5)
   const char * equations11[] = {"x^2+x+1=3×x^2+π×x-√(5)", 0};
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index d4c2610e5..4499032b4 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -9,7 +9,7 @@
 #include <assert.h>
 #include <poincare/matrix_layout.h>
 #include <poincare/layout_helper.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 using namespace Poincare;
 using namespace Shared;
@@ -200,7 +200,7 @@ bool VariableBoxController::selectLeaf(int selectedRow) {
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = '(';
     assert(nameLength < nameToHandleMaxSize);
-    nameLength+= UTF8Decoder::CodePointToChars(KDCodePointEmpty, nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
+    nameLength+= UTF8Decoder::CodePointToChars(UCodePointEmpty, nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength++] = ')';
     assert(nameLength < nameToHandleMaxSize);
diff --git a/escher/include/escher/editable_field.h b/escher/include/escher/editable_field.h
index 53671bd62..3e7beeb98 100644
--- a/escher/include/escher/editable_field.h
+++ b/escher/include/escher/editable_field.h
@@ -3,7 +3,7 @@
 
 #include <ion.h>
 #include <escher/input_event_handler.h>
-#include <kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 
 class EditableField : public InputEventHandler {
 public:
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index ecac2dc63..38059d33a 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -70,7 +70,7 @@ void LayoutField::ContentView::layoutCursorSubview() {
 
 CodePoint LayoutField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
   CodePoint xnt = m_contentView.cursor()->layoutReference().XNTCodePoint();
-  if (xnt != KDCodePointNull) {
+  if (xnt != UCodePointNull) {
     return xnt;
   }
   return defaultXNTCodePoint;
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index f53374500..57f000dfb 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -1,8 +1,8 @@
 #include <escher/text_area.h>
 #include <escher/clipboard.h>
 #include <escher/text_input_helpers.h>
-#include <kandinsky/unicode/utf8_decoder.h>
-#include <kandinsky/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 
 #include <stddef.h>
 #include <assert.h>
@@ -29,7 +29,7 @@ bool TextArea::handleEventWithText(const char * text, bool indentation, bool for
   char buffer[bufferSize];
 
   // Remove the Empty code points
-  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, KDCodePointEmpty, &cursorPositionInCommand);
+  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, UCodePointEmpty, &cursorPositionInCommand);
 
   // Insert the text
   if ((indentation && insertTextWithIndentation(buffer, cursorTextLocation())) || insertTextAtLocation(buffer, cursorTextLocation())) {
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index d8150544f..66ce9d827 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -1,8 +1,8 @@
 #include <escher/text_field.h>
 #include <escher/text_input_helpers.h>
 #include <escher/clipboard.h>
-#include <kandinsky/unicode/utf8_decoder.h>
-#include <kandinsky/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 #include <assert.h>
 
 static inline int minInt(int x, int y) { return x < y ? x : y; }
@@ -112,7 +112,7 @@ bool TextField::ContentView::insertTextAtLocation(const char * text, const char
   const char * codePointPointer = decoder.stringPosition();
   CodePoint codePoint = decoder.nextCodePoint();
   assert(!codePoint.isCombining());
-  while (codePoint != KDCodePointNull) {
+  while (codePoint != UCodePointNull) {
     assert(codePointPointer < m_draftTextBuffer + m_textBufferSize);
     if (codePoint == '\n') {
       *(const_cast<char *>(codePointPointer)) = 0;
@@ -464,7 +464,7 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
   // Remove the Empty code points
   constexpr int bufferSize = TextField::maxBufferSize();
   char buffer[bufferSize];
-  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, eventText, KDCodePointEmpty);
+  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, eventText, UCodePointEmpty);
 
   const char * nextCursorLocation = m_contentView.draftTextBuffer() + draftTextLength();
   if (insertTextAtLocation(buffer, cursorTextLocation())) {
diff --git a/escher/src/text_input_helpers.cpp b/escher/src/text_input_helpers.cpp
index 436a076f6..e0801444b 100644
--- a/escher/src/text_input_helpers.cpp
+++ b/escher/src/text_input_helpers.cpp
@@ -1,5 +1,5 @@
 #include <escher/text_input_helpers.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <string.h>
 
 namespace TextInputHelpers {
@@ -8,8 +8,8 @@ const char * CursorPositionInCommand(const char * text) {
   UTF8Decoder decoder(text);
   const char * currentPointer = text;
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != KDCodePointNull) {
-    if (codePoint == KDCodePointEmpty) {
+  while (codePoint != UCodePointNull) {
+    if (codePoint == UCodePointEmpty) {
       return currentPointer;
     }
     //TODO make sure changing empty / ' order was OK
diff --git a/ion/Makefile b/ion/Makefile
index 2de2eb1e8..28aeb0bc2 100644
--- a/ion/Makefile
+++ b/ion/Makefile
@@ -22,6 +22,8 @@ src += $(addprefix ion/src/shared/, \
   events.cpp \
   platform_info.cpp \
   storage.cpp \
+  unicode/utf8_decoder.cpp\
+  unicode/utf8_helper.cpp\
 )
 
 src += ion/src/external/lz4/lz4.c
@@ -31,4 +33,5 @@ tests += $(addprefix ion/test/,\
   events.cpp\
   keyboard.cpp\
   storage.cpp\
+  utf8_decoder.cpp\
 )
diff --git a/ion/include/ion/unicode/code_point.h b/ion/include/ion/unicode/code_point.h
new file mode 100644
index 000000000..b5b409b42
--- /dev/null
+++ b/ion/include/ion/unicode/code_point.h
@@ -0,0 +1,53 @@
+#ifndef ION_UNICODE_CODE_POINT_H
+#define ION_UNICODE_CODE_POINT_H
+
+#include <stdint.h>
+
+class CodePoint {
+public:
+  constexpr static int MaxCodePointCharLength = sizeof(uint32_t) / sizeof(char);
+  constexpr CodePoint(uint32_t c) : m_code(c) {}
+  constexpr operator uint32_t() const { return m_code; }
+
+  bool isCombining() const {
+    return (m_code >= 0x300 && m_code <= 0x036F);
+  }
+private:
+  uint32_t m_code;
+};
+
+
+// TODO LEA Remove unneeded values
+static constexpr CodePoint UCodePointNull                     = 0x0;
+static constexpr CodePoint UCodePointTabulation               = 0x9;
+static constexpr CodePoint UCodePointLineFeed                 = 0xa;
+
+/* 0x11, 0x12, 0x13, 0x14 represent DEVICE CONTROL ONE TO FOUR. They are not
+ * used, so we can use them for another purpose */
+static constexpr CodePoint UCodePointEmpty                    = 0x11; // Used to be parsed into EmptyExpression
+static constexpr CodePoint UCodePointLeftSuperscript          = 0x12; // Used to parse Power
+static constexpr CodePoint UCodePointRightSuperscript         = 0x13; // Used to parse Power
+static constexpr CodePoint UCodePointUnknownX                 = 0x14; // Used to store expressions
+
+static constexpr CodePoint UCodePointSpace                    = 0x20;    //
+static constexpr CodePoint UCodePointDegree                   = 0xb0;    // °
+static constexpr CodePoint UCodePointMiddleDot                = 0xb7;    // ·
+static constexpr CodePoint UCodePointMultiplicationSign       = 0xd7;    // ×
+static constexpr CodePoint UCodePointGreekCapitalLetterGamma  = 0x393;   // Γ
+static constexpr CodePoint UCodePointGreekCapitalLetterDelta  = 0x394;   // Δ
+static constexpr CodePoint UCodePointGreekSmallLetterTheta    = 0x3b8;   // θ
+static constexpr CodePoint UCodePointGreekSmallLetterLambda   = 0x3bb;   // λ
+static constexpr CodePoint UCodePointGreekSmallLetterPi       = 0x3c0;   // π
+static constexpr CodePoint UCodePointGreekSmallLetterSigma    = 0x3c3;   // σ
+static constexpr CodePoint UCodePointLatinLetterSmallCapitalE = 0x1d07;  // ᴇ
+static constexpr CodePoint UCodePointScriptSmallE             = 0x212f;  // ℯ
+static constexpr CodePoint UCodePointRightwardsArrow          = 0x2192;  // →
+static constexpr CodePoint UCodePointNArySummation            = 0x2211;  // ∑
+static constexpr CodePoint UCodePointSquareRoot               = 0x221a;  // √
+static constexpr CodePoint UCodePointIntegral                 = 0x222b;  // ∫
+static constexpr CodePoint UCodePointAlmostEqualTo            = 0x2248;  // ≈
+static constexpr CodePoint UCodePointLessThanOrEqualTo        = 0x2264;  // ≤
+static constexpr CodePoint UCodePointGreaterThanOrEqualTo     = 0x2265;  // ≥
+static constexpr CodePoint UCodePointMathematicalBoldSmallI   = 0x1d422; // 𝐢
+
+#endif
diff --git a/kandinsky/include/kandinsky/unicode/utf8_decoder.h b/ion/include/ion/unicode/utf8_decoder.h
similarity index 93%
rename from kandinsky/include/kandinsky/unicode/utf8_decoder.h
rename to ion/include/ion/unicode/utf8_decoder.h
index d9884f7fb..7b309b2dc 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_decoder.h
+++ b/ion/include/ion/unicode/utf8_decoder.h
@@ -1,5 +1,5 @@
-#ifndef KANDINSKY_UNICODE_UTF8_DECODER_H
-#define KANDINSKY_UNICODE_UTF8_DECODER_H
+#ifndef ION_UNICODE_UTF8_DECODER_H
+#define ION_UNICODE_UTF8_DECODER_H
 
 #include "code_point.h"
 #include <stddef.h>
diff --git a/kandinsky/include/kandinsky/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
similarity index 84%
rename from kandinsky/include/kandinsky/unicode/utf8_helper.h
rename to ion/include/ion/unicode/utf8_helper.h
index 5d7c7d4a9..bc0e55c59 100644
--- a/kandinsky/include/kandinsky/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -1,5 +1,5 @@
-#ifndef KANDINSKY_UNICODE_UTF8_HELPER_H
-#define KANDINSKY_UNICODE_UTF8_HELPER_H
+#ifndef ION_UNICODE_UTF8_HELPER_H
+#define ION_UNICODE_UTF8_HELPER_H
 
 #include "code_point.h"
 #include <stddef.h>
diff --git a/ion/src/shared/events.cpp b/ion/src/shared/events.cpp
index 89fb1a736..60fb99c63 100644
--- a/ion/src/shared/events.cpp
+++ b/ion/src/shared/events.cpp
@@ -1,5 +1,5 @@
 #include <ion/events.h>
-#include <kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 
 extern "C" {
 #include <assert.h>
@@ -25,7 +25,7 @@ private:
 #define U() EventData::Undefined()
 #define T(x) EventData::Text(x)
 
-static_assert('\x11' == KDCodePointEmpty, "Unicode error");
+static_assert('\x11' == UCodePointEmpty, "Unicode error");
 static constexpr EventData s_dataForEvent[4*Event::PageSize] = {
 // Plain
   TL(), TL(), TL(), TL(), TL(), TL(),
diff --git a/kandinsky/src/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
similarity index 98%
rename from kandinsky/src/unicode/utf8_decoder.cpp
rename to ion/src/shared/unicode/utf8_decoder.cpp
index 1c5f65f5f..5f97d0bf8 100644
--- a/kandinsky/src/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -1,4 +1,4 @@
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <assert.h>
 
 static inline int leading_ones(uint8_t value) {
diff --git a/kandinsky/src/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
similarity index 91%
rename from kandinsky/src/unicode/utf8_helper.cpp
rename to ion/src/shared/unicode/utf8_helper.cpp
index 4a984d1a7..4bcce52b6 100644
--- a/kandinsky/src/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -1,5 +1,5 @@
-#include <kandinsky/unicode/utf8_helper.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
@@ -12,7 +12,7 @@ const char * CodePointSearch(const char * s, CodePoint c) {
   const char * currentPointer = s;
   CodePoint codePoint = decoder.nextCodePoint();
   const char * nextPointer = decoder.stringPosition();
-  while (codePoint != KDCodePointNull && codePoint != c) {
+  while (codePoint != UCodePointNull && codePoint != c) {
     currentPointer = nextPointer;
     codePoint = decoder.nextCodePoint();
     nextPointer = decoder.stringPosition();
diff --git a/ion/test/utf8_decoder.cpp b/ion/test/utf8_decoder.cpp
new file mode 100644
index 000000000..56e280fa4
--- /dev/null
+++ b/ion/test/utf8_decoder.cpp
@@ -0,0 +1,15 @@
+#include <quiz.h>
+#include <ion/unicode/utf8_decoder.h>
+
+void assert_decodes_to(const char * string, CodePoint c) {
+  UTF8Decoder d(string);
+  quiz_assert(d.nextCodePoint() == c);
+  quiz_assert(d.nextCodePoint() == 0);
+}
+
+QUIZ_CASE(ion_utf8_decoder) {
+  assert_decodes_to("\x20", 0x20);
+  assert_decodes_to("\xC2\xA2", 0xA2);
+  assert_decodes_to("\xED\x9F\xBF", 0xD7FF);
+  assert_decodes_to("\xCC\x81", 0x301);
+}
diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index 65d536af8..8389a12ad 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -13,8 +13,6 @@ src += $(addprefix kandinsky/src/,\
   ion_context.cpp \
   point.cpp \
   rect.cpp \
-  unicode/utf8_decoder.cpp\
-  unicode/utf8_helper.cpp\
 )
 
 src += $(addprefix kandinsky/fonts/, \
@@ -26,7 +24,6 @@ tests += $(addprefix kandinsky/test/,\
   color.cpp\
   font.cpp\
   rect.cpp\
-  utf8_decoder.cpp\
 )
 
 RASTERIZER_CFLAGS := -std=c99 `pkg-config freetype2 --cflags`
diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 164dce2c8..0d47e9d4a 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -5,7 +5,7 @@
 #include <stddef.h>
 #include <kandinsky/size.h>
 #include <kandinsky/coordinate.h>
-#include <kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 #include "palette.h"
 
 /* We use UTF-8 encoding. This means that a character is encoded as a code point
diff --git a/kandinsky/include/kandinsky/unicode/code_point.h b/kandinsky/include/kandinsky/unicode/code_point.h
deleted file mode 100644
index 7e885d028..000000000
--- a/kandinsky/include/kandinsky/unicode/code_point.h
+++ /dev/null
@@ -1,53 +0,0 @@
-#ifndef KANDINSKY_UNICODE_CODE_POINT_H
-#define KANDINSKY_UNICODE_CODE_POINT_H
-
-#include <stdint.h>
-
-class CodePoint {
-public:
-  constexpr static int MaxCodePointCharLength = sizeof(uint32_t) / sizeof(char);
-  constexpr CodePoint(uint32_t c) : m_code(c) {}
-  constexpr operator uint32_t() const { return m_code; }
-
-  bool isCombining() const {
-    return (m_code >= 0x300 && m_code <= 0x036F);
-  }
-private:
-  uint32_t m_code;
-};
-
-
-// TODO LEA Remove unneeded values
-static constexpr CodePoint KDCodePointNull                     = 0x0;
-static constexpr CodePoint KDCodePointTabulation               = 0x9;
-static constexpr CodePoint KDCodePointLineFeed                 = 0xa;
-
-/* 0x11, 0x12, 0x13, 0x14 represent DEVICE CONTROL ONE TO FOUR. They are not
- * used, so we can use them for another purpose */
-static constexpr CodePoint KDCodePointEmpty                    = 0x11; // Used to be parsed into EmptyExpression
-static constexpr CodePoint KDCodePointLeftSuperscript          = 0x12; // Used to parse Power
-static constexpr CodePoint KDCodePointRightSuperscript         = 0x13; // Used to parse Power
-static constexpr CodePoint KDCodePointUnknownX                 = 0x14; // Used to store expressions
-
-static constexpr CodePoint KDCodePointSpace                    = 0x20;    //
-static constexpr CodePoint KDCodePointDegree                   = 0xb0;    // °
-static constexpr CodePoint KDCodePointMiddleDot                = 0xb7;    // ·
-static constexpr CodePoint KDCodePointMultiplicationSign       = 0xd7;    // ×
-static constexpr CodePoint KDCodePointGreekCapitalLetterGamma  = 0x393;   // Γ
-static constexpr CodePoint KDCodePointGreekCapitalLetterDelta  = 0x394;   // Δ
-static constexpr CodePoint KDCodePointGreekSmallLetterTheta    = 0x3b8;   // θ
-static constexpr CodePoint KDCodePointGreekSmallLetterLambda   = 0x3bb;   // λ
-static constexpr CodePoint KDCodePointGreekSmallLetterPi       = 0x3c0;   // π
-static constexpr CodePoint KDCodePointGreekSmallLetterSigma    = 0x3c3;   // σ
-static constexpr CodePoint KDCodePointLatinLetterSmallCapitalE = 0x1d07;  // ᴇ
-static constexpr CodePoint KDCodePointScriptSmallE             = 0x212f;  // ℯ
-static constexpr CodePoint KDCodePointRightwardsArrow          = 0x2192;  // →
-static constexpr CodePoint KDCodePointNArySummation            = 0x2211;  // ∑
-static constexpr CodePoint KDCodePointSquareRoot               = 0x221a;  // √
-static constexpr CodePoint KDCodePointIntegral                 = 0x222b;  // ∫
-static constexpr CodePoint KDCodePointAlmostEqualTo            = 0x2248;  // ≈
-static constexpr CodePoint KDCodePointLessThanOrEqualTo        = 0x2264;  // ≤
-static constexpr CodePoint KDCodePointGreaterThanOrEqualTo     = 0x2265;  // ≥
-static constexpr CodePoint KDCodePointMathematicalBoldSmallI   = 0x1d422; // 𝐢
-
-#endif
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index 860d9da65..29047fcb0 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <kandinsky/context.h>
 #include <kandinsky/font.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 constexpr static int k_tabCharacterWidth = 4;
 
@@ -14,11 +14,11 @@ KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font,
 
   UTF8Decoder decoder(text);
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != KDCodePointNull) {
-    if (codePoint == KDCodePointLineFeed) {
+  while (codePoint != UCodePointNull) {
+    if (codePoint == UCodePointLineFeed) {
       position = KDPoint(0, position.y() + glyphSize.height());
       codePoint = decoder.nextCodePoint();
-    } else if (codePoint == KDCodePointTabulation) {
+    } else if (codePoint == UCodePointTabulation) {
       position = position.translatedBy(KDPoint(k_tabCharacterWidth * glyphSize.width(), 0));
       codePoint = decoder.nextCodePoint();
     } else {
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 93a07f9b3..68c01495d 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -1,7 +1,7 @@
 #include <assert.h>
 #include <kandinsky/font.h>
 #include <ion.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 constexpr static int k_tabCharacterWidth = 4;
 
@@ -14,11 +14,11 @@ KDSize KDFont::stringSizeUntil(const char * text, const char * limit) const {
   UTF8Decoder decoder(text);
   const char * currentStringPosition = decoder.stringPosition();
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != KDCodePointNull && (limit == nullptr || currentStringPosition < limit)) {
+  while (codePoint != UCodePointNull && (limit == nullptr || currentStringPosition < limit)) {
     KDSize cSize = KDSize(m_glyphSize.width(), 0);
-    if (codePoint == KDCodePointLineFeed) {
+    if (codePoint == UCodePointLineFeed) {
       cSize = KDSize(0, m_glyphSize.height());
-    } else if (codePoint == KDCodePointTabulation) {
+    } else if (codePoint == UCodePointTabulation) {
       cSize = KDSize(k_tabCharacterWidth * m_glyphSize.width(), 0);
     } else if (codePoint.isCombining()) {
       cSize = KDSizeZero;
diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index 28d3970e7..97fcfdae9 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -1,7 +1,7 @@
 #ifndef POINCARE_CODEPOINT_LAYOUT_NODE_H
 #define POINCARE_CODEPOINT_LAYOUT_NODE_H
 
-#include <kandinsky/include/kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 #include <poincare/layout_cursor.h>
 #include <poincare/layout.h>
 
@@ -13,7 +13,7 @@ namespace Poincare {
 class CodePointLayoutNode final : public LayoutNode {
 public:
   static constexpr const KDFont * k_defaultFont = KDFont::LargeFont;
-  CodePointLayoutNode(CodePoint c = KDCodePointNull, const KDFont * font = k_defaultFont) :
+  CodePointLayoutNode(CodePoint c = UCodePointNull, const KDFont * font = k_defaultFont) :
     LayoutNode(),
     m_codePoint(c),
     m_font(font)
diff --git a/poincare/include/poincare/constant.h b/poincare/include/poincare/constant.h
index e0a9c5626..d80818087 100644
--- a/poincare/include/poincare/constant.h
+++ b/poincare/include/poincare/constant.h
@@ -38,9 +38,9 @@ public:
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
 
   /* Symbol properties */
-  bool isPi() const { return isConstantCodePoint(KDCodePointGreekSmallLetterPi); }
-  bool isExponential() const { return isConstantCodePoint(KDCodePointScriptSmallE); }
-  bool isIComplex() const { return isConstantCodePoint(KDCodePointMathematicalBoldSmallI); }
+  bool isPi() const { return isConstantCodePoint(UCodePointGreekSmallLetterPi); }
+  bool isExponential() const { return isConstantCodePoint(UCodePointScriptSmallE); }
+  bool isIComplex() const { return isConstantCodePoint(UCodePointMathematicalBoldSmallI); }
   CodePoint codePoint() const;
 
   // Comparison
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index d73188a7d..0475c14ce 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -107,7 +107,7 @@ public:
   virtual bool hasUpperLeftIndex() const { return false; }
   virtual CodePoint XNTCodePoint() const {
     LayoutNode * p = parent();
-    return p == nullptr ? KDCodePointNull : p->XNTCodePoint();
+    return p == nullptr ? UCodePointNull : p->XNTCodePoint();
   }
 
   virtual bool willAddChildAtIndex(LayoutNode * l, int * index, int * currentNumberOfChildren, LayoutCursor * cursor) { return true; }
diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index 061e587ce..10126cce7 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -2,7 +2,7 @@
 #define POINCARE_SERIALIZATION_HELPER_H
 
 #include <poincare/tree_node.h>
-#include <kandinsky/include/kandinsky/unicode/code_point.h>
+#include <ion/unicode/code_point.h>
 
 namespace Poincare {
 
diff --git a/poincare/src/code_point_layout.cpp b/poincare/src/code_point_layout.cpp
index 2e052164c..4914aecb4 100644
--- a/poincare/src/code_point_layout.cpp
+++ b/poincare/src/code_point_layout.cpp
@@ -34,7 +34,7 @@ int CodePointLayoutNode::serialize(char * buffer, int bufferSize, Preferences::P
 bool CodePointLayoutNode::isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const {
   if (*numberOfOpenParenthesis <= 0) {
     if (m_codePoint == '+'
-        || m_codePoint == KDCodePointRightwardsArrow
+        || m_codePoint == UCodePointRightwardsArrow
         || m_codePoint == '='
         || m_codePoint == ',')
     {
@@ -50,7 +50,7 @@ bool CodePointLayoutNode::isCollapsable(int * numberOfOpenParenthesis, bool goin
         if (indexOfThis > 0) {
           Layout leftBrother = parent.childAtIndex(indexOfThis-1);
           if (leftBrother.isCodePoint()
-              && static_cast<CodePointLayout&>(leftBrother).codePoint() == KDCodePointLatinLetterSmallCapitalE)
+              && static_cast<CodePointLayout&>(leftBrother).codePoint() == UCodePointLatinLetterSmallCapitalE)
           {
             return true;
           }
@@ -94,8 +94,8 @@ void CodePointLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionC
 
 bool CodePointLayoutNode::isMultiplicationCodePoint() const {
   return m_codePoint == '*'
-    || m_codePoint == KDCodePointMultiplicationSign
-    || m_codePoint == KDCodePointMiddleDot;
+    || m_codePoint == UCodePointMultiplicationSign
+    || m_codePoint == UCodePointMiddleDot;
 }
 
 CodePointLayout CodePointLayout::Builder(CodePoint c, const KDFont * font) {
diff --git a/poincare/src/complex_argument.cpp b/poincare/src/complex_argument.cpp
index b803c66eb..be4b24a7c 100644
--- a/poincare/src/complex_argument.cpp
+++ b/poincare/src/complex_argument.cpp
@@ -57,7 +57,7 @@ Expression ComplexArgument::shallowReduce(Context & context, Preferences::Comple
       return result;
     } else if (!std::isnan(app) && app <= -Expression::Epsilon<float>()) {
       // arg(x) = Pi if x < 0
-      Expression result = Constant::Builder(KDCodePointGreekSmallLetterPi);
+      Expression result = Constant::Builder(UCodePointGreekSmallLetterPi);
       replaceWithInPlace(result);
       return result;
     }
diff --git a/poincare/src/complex_cartesian.cpp b/poincare/src/complex_cartesian.cpp
index 70b027169..2f1514791 100644
--- a/poincare/src/complex_cartesian.cpp
+++ b/poincare/src/complex_cartesian.cpp
@@ -152,7 +152,7 @@ Expression ComplexCartesian::argument(Context & context, Preferences::ComplexFor
     }
     // Then, compute sign(b) * Pi/2 - arctan(a/b)
     Expression signb = SignFunction::Builder(b);
-    Expression signbPi2 = Multiplication::Builder(Rational::Builder(1,2), signb, Constant::Builder(KDCodePointGreekSmallLetterPi));
+    Expression signbPi2 = Multiplication::Builder(Rational::Builder(1,2), signb, Constant::Builder(UCodePointGreekSmallLetterPi));
     signb.shallowReduce(context, complexFormat, angleUnit, target);
     Expression sub = Subtraction::Builder(signbPi2, arcTangent);
     signbPi2.shallowReduce(context, complexFormat, angleUnit, target);
@@ -163,7 +163,7 @@ Expression ComplexCartesian::argument(Context & context, Preferences::ComplexFor
     Expression signa = SignFunction::Builder(a).shallowReduce(context, complexFormat, angleUnit, target);
     Subtraction sub = Subtraction::Builder(Rational::Builder(1), signa);
     signa.shallowReduce(context, complexFormat, angleUnit, target);
-    Multiplication mul = Multiplication::Builder(Rational::Builder(1,2), Constant::Builder(KDCodePointGreekSmallLetterPi), sub);
+    Multiplication mul = Multiplication::Builder(Rational::Builder(1,2), Constant::Builder(UCodePointGreekSmallLetterPi), sub);
     sub.shallowReduce(context, complexFormat, angleUnit, target);
     return mul;
   }
@@ -330,7 +330,7 @@ ComplexCartesian ComplexCartesian::power(ComplexCartesian & other, Context & con
   rclone.shallowReduce(context, complexFormat, angleUnit, target);
   Expression thmuld = Multiplication::Builder(Rational::Builder(-1), thclone, d.clone());
   thclone.shallowReduce(context, complexFormat, angleUnit, target);
-  Expression exp = Power::Builder(Constant::Builder(KDCodePointScriptSmallE), thmuld);
+  Expression exp = Power::Builder(Constant::Builder(UCodePointScriptSmallE), thmuld);
   thmuld.shallowReduce(context, complexFormat, angleUnit, target);
   Multiplication norm = Multiplication::Builder(rpowc, exp);
   rpowc.shallowReduce(context, complexFormat, angleUnit, target);
diff --git a/poincare/src/constant.cpp b/poincare/src/constant.cpp
index 329babeda..e2e8cac80 100644
--- a/poincare/src/constant.cpp
+++ b/poincare/src/constant.cpp
@@ -10,7 +10,7 @@
 #include <ion.h>
 #include <cmath>
 #include <assert.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
@@ -31,11 +31,11 @@ bool ConstantNode::isReal(Context & context) const {
 
 int rankOfConstant(CodePoint c) {
   switch (c) {
-    case KDCodePointMathematicalBoldSmallI :
+    case UCodePointMathematicalBoldSmallI :
       return 0;
-    case KDCodePointGreekSmallLetterPi :
+    case UCodePointGreekSmallLetterPi :
       return 1;
-    case KDCodePointScriptSmallE :
+    case UCodePointScriptSmallE :
       return 2;
     default:
       assert(false);
@@ -46,7 +46,7 @@ int rankOfConstant(CodePoint c) {
 CodePoint ConstantNode::codePoint() const {
   UTF8Decoder decoder = UTF8Decoder(m_name);
   CodePoint result = decoder.nextCodePoint();
-  assert(decoder.nextCodePoint() == KDCodePointNull);
+  assert(decoder.nextCodePoint() == UCodePointNull);
   return result;
 }
 
@@ -88,7 +88,7 @@ Expression ConstantNode::shallowReduce(Context & context, Preferences::ComplexFo
 bool ConstantNode::isConstantCodePoint(CodePoint c) const {
   UTF8Decoder decoder(m_name);
   bool result = (decoder.nextCodePoint() == c);
-  assert(decoder.nextCodePoint() == KDCodePointNull);
+  assert(decoder.nextCodePoint() == UCodePointNull);
   return result;
 }
 
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index c24095089..535bdba68 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -177,7 +177,7 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
       return currentChar;
     }
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
-    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, KDCodePointLatinLetterSmallCapitalE);
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, UCodePointLatinLetterSmallCapitalE);
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
     currentChar += Integer(exponent).serialize(buffer+currentChar, bufferSize-currentChar);
     return currentChar;
diff --git a/poincare/src/empty_expression.cpp b/poincare/src/empty_expression.cpp
index 88bd12e1f..196630cc4 100644
--- a/poincare/src/empty_expression.cpp
+++ b/poincare/src/empty_expression.cpp
@@ -6,7 +6,7 @@
 namespace Poincare {
 
 int EmptyExpressionNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  return SerializationHelper::CodePoint(buffer, bufferSize, KDCodePointEmpty);
+  return SerializationHelper::CodePoint(buffer, bufferSize, UCodePointEmpty);
 }
 
 Layout EmptyExpressionNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 044e6f9b5..1a9dad03a 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -6,7 +6,7 @@
 #include <poincare/symbol.h>
 #include <poincare/variable_context.h>
 #include <ion.h>
-#include <kandinsky/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_helper.h>
 #include <cmath>
 #include <float.h>
 
@@ -343,7 +343,7 @@ void Expression::SetEncounteredComplex(bool encounterComplex) {
 }
 
 Preferences::ComplexFormat Expression::UpdatedComplexFormatWithTextInput(Preferences::ComplexFormat complexFormat, const char * textInput) {
-  if (complexFormat == Preferences::ComplexFormat::Real && UTF8Helper::CodePointSearch(textInput, KDCodePointMathematicalBoldSmallI) != nullptr) {
+  if (complexFormat == Preferences::ComplexFormat::Real && UTF8Helper::CodePointSearch(textInput, UCodePointMathematicalBoldSmallI) != nullptr) {
     return Preferences::ComplexFormat::Cartesian;
   }
   return complexFormat;
@@ -520,12 +520,12 @@ Expression Expression::ExpressionWithoutSymbols(Expression e, Context & context)
 
 Expression Expression::radianToDegree() {
   // e*180/Pi
-  return Multiplication::Builder(*this, Rational::Builder(180), Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(-1)));
+  return Multiplication::Builder(*this, Rational::Builder(180), Power::Builder(Constant::Builder(UCodePointGreekSmallLetterPi), Rational::Builder(-1)));
 }
 
 Expression Expression::degreeToRadian() {
   // e*Pi/180
-  return Multiplication::Builder(*this, Rational::Builder(1, 180), Constant::Builder(KDCodePointGreekSmallLetterPi));
+  return Multiplication::Builder(*this, Rational::Builder(1, 180), Constant::Builder(UCodePointGreekSmallLetterPi));
 }
 
 Expression Expression::reduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
@@ -627,9 +627,9 @@ Expression Expression::CreateComplexExpression(Expression ra, Expression tb, Pre
       }
       if (!isZeroTb) {
         if (isOneTb) {
-          imag = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+          imag = Constant::Builder(UCodePointMathematicalBoldSmallI);
         } else {
-          imag = Multiplication::Builder(tb , Constant::Builder(KDCodePointMathematicalBoldSmallI));
+          imag = Multiplication::Builder(tb , Constant::Builder(UCodePointMathematicalBoldSmallI));
         }
       }
       if (imag.isUninitialized()) {
@@ -658,14 +658,14 @@ Expression Expression::CreateComplexExpression(Expression ra, Expression tb, Pre
       if (!isZeroRa && !isZeroTb) {
         Expression arg;
         if (isOneTb) {
-          arg = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+          arg = Constant::Builder(UCodePointMathematicalBoldSmallI);
         } else {
-          arg = Multiplication::Builder(tb, Constant::Builder(KDCodePointMathematicalBoldSmallI));
+          arg = Multiplication::Builder(tb, Constant::Builder(UCodePointMathematicalBoldSmallI));
         }
         if (isNegativeTb) {
           arg = Opposite::Builder(arg);
         }
-        exp = Power::Builder(Constant::Builder(KDCodePointScriptSmallE), arg);
+        exp = Power::Builder(Constant::Builder(UCodePointScriptSmallE), arg);
       }
       if (exp.isUninitialized()) {
         return norm;
diff --git a/poincare/src/expression_debug.cpp b/poincare/src/expression_debug.cpp
index 34eaa839d..cf56a96c8 100644
--- a/poincare/src/expression_debug.cpp
+++ b/poincare/src/expression_debug.cpp
@@ -216,13 +216,13 @@ void print_expression(const Expression e, int indentationLevel) {
       UTF8Decoder decoder(static_cast<const Symbol &>(e).name());
       CodePoint firstCodePoint = decoder.nextCodePoint();
       switch (firstCodePoint) {
-        case KDCodePointGreekSmallLetterPi:
+        case UCodePointGreekSmallLetterPi:
           std::cout << "PI";
           break;
-        case KDCodePointMathematicalBoldSmallI:
+        case UCodePointMathematicalBoldSmallI:
           std::cout << "i";
           break;
-        case KDCodePointScriptSmallE:
+        case UCodePointScriptSmallE:
           std::cout << "e";
           break;
         default:
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 4443c13fd..2d34d4028 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -134,7 +134,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 
   // Add a multiplication if omitted.
   if (idxInParent > 0 && p->isHorizontal() && p->childAtIndex(idxInParent - 1)->canBeOmittedMultiplicationLeftFactor()) {
-    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointMiddleDot);
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, UCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
@@ -158,7 +158,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 
   // Add a multiplication if omitted.
   if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->isHorizontal() && p->childAtIndex(idxInParent + 1)->canBeOmittedMultiplicationRightFactor()) {
-    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointMiddleDot);
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, UCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index bdbfcb44b..70e7c73e3 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -9,7 +9,7 @@
 #include <poincare/nth_root_layout.h>
 #include <poincare/right_parenthesis_layout.h>
 #include <poincare/vertical_offset_layout.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <stdio.h>
 
 namespace Poincare {
@@ -75,7 +75,7 @@ void LayoutCursor::move(MoveDirection direction, bool * shouldRecomputeLayout) {
 void LayoutCursor::addEmptyExponentialLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CodePointLayout::Builder(KDCodePointScriptSmallE),
+      CodePointLayout::Builder(UCodePointScriptSmallE),
       VerticalOffsetLayout::Builder(emptyLayout, VerticalOffsetLayoutNode::Type::Superscript));
   m_layout.addSibling(this, sibling, false);
   m_layout = emptyLayout;
@@ -114,7 +114,7 @@ void LayoutCursor::addEmptySquarePowerLayout() {
 void LayoutCursor::addEmptyTenPowerLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
-      CodePointLayout::Builder(KDCodePointMiddleDot),
+      CodePointLayout::Builder(UCodePointMiddleDot),
       CodePointLayout::Builder('1'),
       CodePointLayout::Builder('0'),
       VerticalOffsetLayout::Builder(
@@ -141,18 +141,18 @@ void LayoutCursor::insertText(const char * text) {
   Layout pointedChild;
   UTF8Decoder decoder(text);
   CodePoint codePoint = decoder.nextCodePoint();
-  if (codePoint == KDCodePointNull) {
+  if (codePoint == UCodePointNull) {
     return;
   }
   assert(!codePoint.isCombining());
-  while (codePoint != KDCodePointNull) {
-    if (codePoint == KDCodePointEmpty) {
+  while (codePoint != UCodePointNull) {
+    if (codePoint == UCodePointEmpty) {
       codePoint = decoder.nextCodePoint();
       assert(!codePoint.isCombining());
       continue;
     }
-    if (codePoint == KDCodePointMultiplicationSign) {
-      newChild = CodePointLayout::Builder(KDCodePointMiddleDot);
+    if (codePoint == UCodePointMultiplicationSign) {
+      newChild = CodePointLayout::Builder(UCodePointMiddleDot);
     } else if (codePoint == '(') {
       newChild = LeftParenthesisLayout::Builder();
       if (pointedChild.isUninitialized()) {
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index 2b41a2b45..91a48b984 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -4,7 +4,7 @@
 #include <poincare/left_parenthesis_layout.h>
 #include <poincare/right_parenthesis_layout.h>
 #include <poincare/vertical_offset_layout.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <assert.h>
 
 namespace Poincare {
@@ -64,7 +64,7 @@ HorizontalLayout LayoutHelper::String(const char * buffer, int bufferLen, const
   assert(!codePoint.isCombining());
   int layoutIndex = 0;
   int bufferIndex = 0;
-  while (codePoint != KDCodePointNull && bufferIndex < bufferLen) {
+  while (codePoint != UCodePointNull && bufferIndex < bufferLen) {
     resultLayout.addChildAtIndex(CodePointLayout::Builder(codePoint, font), layoutIndex, layoutIndex, nullptr);
     layoutIndex++;
     bufferIndex+= nextPointer - currentPointer;
diff --git a/poincare/src/logarithm.cpp b/poincare/src/logarithm.cpp
index 1e911c6e3..659bd5e09 100644
--- a/poincare/src/logarithm.cpp
+++ b/poincare/src/logarithm.cpp
@@ -341,7 +341,7 @@ Expression Logarithm::splitLogarithmInteger(Integer i, bool isDenominator, Conte
 
 Expression Logarithm::shallowBeautify() {
   assert(numberOfChildren() == 2);
-  Constant e = Constant::Builder(KDCodePointScriptSmallE);
+  Constant e = Constant::Builder(UCodePointScriptSmallE);
   if (childAtIndex(1).isIdenticalTo(e)) {
     NaperianLogarithm np = NaperianLogarithm::Builder(childAtIndex(0));
     replaceWithInPlace(np);
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index edc28d20e..b7e86690c 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -87,14 +87,14 @@ bool MultiplicationNode::childNeedsParenthesis(const TreeNode * child) const {
 Layout MultiplicationNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
   char string[stringMaxSize];
-  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointMiddleDot);
+  SerializationHelper::CodePoint(string, stringMaxSize, UCodePointMiddleDot);
   return LayoutHelper::Infix(Multiplication(this), floatDisplayMode, numberOfSignificantDigits, string);
 }
 
 int MultiplicationNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
   char string[stringMaxSize];
-  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointMultiplicationSign);
+  SerializationHelper::CodePoint(string, stringMaxSize, UCodePointMultiplicationSign);
   return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, string);
 }
 
diff --git a/poincare/src/naperian_logarithm.cpp b/poincare/src/naperian_logarithm.cpp
index 56fb53063..3891c30cc 100644
--- a/poincare/src/naperian_logarithm.cpp
+++ b/poincare/src/naperian_logarithm.cpp
@@ -35,7 +35,7 @@ Expression NaperianLogarithm::shallowReduce(Context & context, Preferences::Comp
     return SimplificationHelper::Map(*this, context, angleUnit);
   }
 #endif
-  Logarithm l = Logarithm::Builder(childAtIndex(0), Constant::Builder(KDCodePointScriptSmallE));
+  Logarithm l = Logarithm::Builder(childAtIndex(0), Constant::Builder(UCodePointScriptSmallE));
   replaceWithInPlace(l);
   return l.shallowReduce(context, complexFormat, angleUnit, target);
 }
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index 898641318..0172cdc52 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -168,7 +168,7 @@ int NthRootLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pri
   buffer[bufferSize-1] = 0;
   int numberOfChar = 0;
 
-  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, KDCodePointSquareRoot);
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, UCodePointSquareRoot);
   if (numberOfChar >= bufferSize-1) {
     return bufferSize-1;
   }
diff --git a/poincare/src/parsing/parser.cpp b/poincare/src/parsing/parser.cpp
index 308c507f5..cda117ec0 100644
--- a/poincare/src/parsing/parser.cpp
+++ b/poincare/src/parsing/parser.cpp
@@ -1,5 +1,5 @@
 #include "parser.h"
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
diff --git a/poincare/src/parsing/token.h b/poincare/src/parsing/token.h
index 83079df49..000200cda 100644
--- a/poincare/src/parsing/token.h
+++ b/poincare/src/parsing/token.h
@@ -53,7 +53,7 @@ public:
     Undefined
   };
 
-  Token(Type type) : m_type(type), m_text(0), m_codePoint(KDCodePointNull) {};
+  Token(Type type) : m_type(type), m_text(0), m_codePoint(UCodePointNull) {};
 
   Type type() const { return m_type; }
   bool is(Type t) const { return m_type == t; }
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index ea30387a4..26bd6d7bd 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -1,6 +1,6 @@
 #include "tokenizer.h"
 #include <poincare/number.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 
 namespace Poincare {
 
@@ -18,7 +18,7 @@ const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, boo
   CodePoint firstCodePoint = decoder.nextCodePoint();
   const char * nextPointer = decoder.stringPosition();
   size_t numberOfBytesForCodePoint = nextPointer - currentPointer;
-  if (firstCodePoint != KDCodePointNull) {
+  if (firstCodePoint != UCodePointNull) {
     currentPointer = nextPointer;
     CodePoint codePoint = decoder.nextCodePoint();
     nextPointer = decoder.stringPosition();
@@ -92,7 +92,7 @@ Token Tokenizer::popNumber() {
   const char * exponentPartText = m_text;
   size_t exponentPartLength = 0;
   bool exponentIsNegative = false;
-  if (canPopCodePoint(KDCodePointLatinLetterSmallCapitalE)) {
+  if (canPopCodePoint(UCodePointLatinLetterSmallCapitalE)) {
     exponentIsNegative = canPopCodePoint('-');
     exponentPartText = m_text;
     exponentPartLength = popDigits();
@@ -146,16 +146,16 @@ Token Tokenizer::popToken() {
     assert(c != '.');
     return Token(typeForCodePoint[c - '(']);
   }
-  if (c == KDCodePointMultiplicationSign || c == KDCodePointMiddleDot) {
+  if (c == UCodePointMultiplicationSign || c == UCodePointMiddleDot) {
     return Token(Token::Times);
   }
   if (c == '^') {
     return Token(Token::Caret);
   }
-  if (c == KDCodePointLeftSuperscript) {
+  if (c == UCodePointLeftSuperscript) {
     return Token(Token::LeftSuperscript);
   }
-  if (c == KDCodePointRightSuperscript) {
+  if (c == UCodePointRightSuperscript) {
     return Token(Token::RightSuperscript);
   }
   if (c == '!') {
@@ -176,26 +176,26 @@ Token Tokenizer::popToken() {
   if (c == '}') {
     return Token(Token::RightBrace);
   }
-  if (c == KDCodePointGreekSmallLetterPi
-      || c == KDCodePointMathematicalBoldSmallI
-      || c == KDCodePointScriptSmallE)
+  if (c == UCodePointGreekSmallLetterPi
+      || c == UCodePointMathematicalBoldSmallI
+      || c == UCodePointScriptSmallE)
   {
     Token result(Token::Constant);
     result.setCodePoint(c);
     return result;
   }
-  if (c == KDCodePointSquareRoot) {
+  if (c == UCodePointSquareRoot) {
     Token result(Token::Identifier);
     // TODO compute size manually?
     constexpr int squareRootCharLength = 3;
-    assert(UTF8Decoder::CharSizeOfCodePoint(KDCodePointSquareRoot) == squareRootCharLength);
+    assert(UTF8Decoder::CharSizeOfCodePoint(UCodePointSquareRoot) == squareRootCharLength);
     result.setString(start, squareRootCharLength);
     return result;
   }
-  if (c == KDCodePointEmpty) {
+  if (c == UCodePointEmpty) {
     return Token(Token::Empty);
   }
-  if (c == KDCodePointRightwardsArrow) {
+  if (c == UCodePointRightwardsArrow) {
     return Token(Token::Store);
   }
   if (c == 0) {
diff --git a/poincare/src/parsing/tokenizer.h b/poincare/src/parsing/tokenizer.h
index ef475f6b0..348d76e02 100644
--- a/poincare/src/parsing/tokenizer.h
+++ b/poincare/src/parsing/tokenizer.h
@@ -17,10 +17,10 @@ public:
   Token popToken();
 private:
   typedef bool (*PopTest)(CodePoint c, CodePoint context);
-  const CodePoint nextCodePoint(PopTest popTest, CodePoint context = KDCodePointNull, bool * testResult = nullptr);
+  const CodePoint nextCodePoint(PopTest popTest, CodePoint context = UCodePointNull, bool * testResult = nullptr);
   const CodePoint popCodePoint();
   bool canPopCodePoint(const CodePoint c);
-  size_t popWhile(PopTest popTest, CodePoint context = KDCodePointNull);
+  size_t popWhile(PopTest popTest, CodePoint context = UCodePointNull);
   size_t popDigits();
   size_t popIdentifier();
   Token popNumber();
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index f19b4954b..d0cf19f11 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -521,7 +521,7 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
       Multiplication m1 = Multiplication::Builder();
       replaceWithInPlace(m1);
       // Multiply m1 by i complex
-      Constant i = Constant::Builder(KDCodePointMathematicalBoldSmallI);
+      Constant i = Constant::Builder(UCodePointMathematicalBoldSmallI);
       m1.addChildAtIndexInPlace(i, 0, 0);
       i.shallowReduce(context, complexFormat, angleUnit, target);
       m1.addChildAtIndexInPlace(*this, 1, 1);
@@ -1136,17 +1136,17 @@ Expression Power::equivalentExpressionUsingStandardExpression() const {
 
 Expression Power::CreateComplexExponent(const Expression & r, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
   // Returns e^(i*pi*r)
-  const Constant exp = Constant::Builder(KDCodePointScriptSmallE);
-  Constant iComplex = Constant::Builder(KDCodePointMathematicalBoldSmallI);
-  const Constant pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
+  const Constant exp = Constant::Builder(UCodePointScriptSmallE);
+  Constant iComplex = Constant::Builder(UCodePointMathematicalBoldSmallI);
+  const Constant pi = Constant::Builder(UCodePointGreekSmallLetterPi);
   Multiplication mExp = Multiplication::Builder(iComplex, pi, r.clone());
   iComplex.shallowReduce(context, complexFormat, angleUnit, target);
   Power p = Power::Builder(exp, mExp);
   mExp.shallowReduce(context, complexFormat, angleUnit, target);
   return p;
 #if 0
-  const Constant iComplex = Constant::Builder(KDCodePointMathematicalBoldSmallI);
-  const Constant pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
+  const Constant iComplex = Constant::Builder(UCodePointMathematicalBoldSmallI);
+  const Constant pi = Constant::Builder(UCodePointGreekSmallLetterPi);
   Expression op = Multiplication::Builder(pi, r).shallowReduce(context, complexFormat, angleUnit, false);
   Cosine cos = Cosine(op).shallowReduce(context, complexFormat, angleUnit, false);;
   Sine sin = Sine(op).shallowReduce(context, complexFormat, angleUnit, false);
diff --git a/poincare/src/print_float.cpp b/poincare/src/print_float.cpp
index 76f31560c..cce3d89e7 100644
--- a/poincare/src/print_float.cpp
+++ b/poincare/src/print_float.cpp
@@ -199,7 +199,7 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
   // Print exponent
   assert(numberOfCharsForMantissaWithSign < bufferSize);
   int currentNumberOfChar = numberOfCharsForMantissaWithSign;
-  currentNumberOfChar+= SerializationHelper::CodePoint(buffer + currentNumberOfChar, bufferSize - currentNumberOfChar, KDCodePointLatinLetterSmallCapitalE);
+  currentNumberOfChar+= SerializationHelper::CodePoint(buffer + currentNumberOfChar, bufferSize - currentNumberOfChar, UCodePointLatinLetterSmallCapitalE);
   assert(numberOfCharExponent+currentNumberOfChar < bufferSize);
   PrintFloat::printBase10IntegerWithDecimalMarker(buffer + currentNumberOfChar, numberOfCharExponent, Integer(exponentInBase10), -1);
   buffer[currentNumberOfChar + numberOfCharExponent] = 0;
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index f77ddd247..30c1e5175 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -1,5 +1,5 @@
 #include <poincare/serialization_helper.h>
-#include <kandinsky/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <string.h>
 #include <assert.h>
 
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 755b11b4a..12e7d917f 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -30,14 +30,14 @@ Expression StoreNode::shallowReduce(Context & context, Preferences::ComplexForma
 int StoreNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   constexpr int stringMaxSize = CodePoint::MaxCodePointCharLength + 1;
   char string[stringMaxSize];
-  SerializationHelper::CodePoint(string, stringMaxSize, KDCodePointRightwardsArrow);
+  SerializationHelper::CodePoint(string, stringMaxSize, UCodePointRightwardsArrow);
   return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, string);
 }
 
 Layout StoreNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   HorizontalLayout result = HorizontalLayout::Builder();
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
-  result.addChildAtIndex(CodePointLayout::Builder(KDCodePointRightwardsArrow), result.numberOfChildren(), result.numberOfChildren(), nullptr);
+  result.addChildAtIndex(CodePointLayout::Builder(UCodePointRightwardsArrow), result.numberOfChildren(), result.numberOfChildren(), nullptr);
   result.addOrMergeChildAtIndex(childAtIndex(1)->createLayout(floatDisplayMode, numberOfSignificantDigits), result.numberOfChildren(), false);
   return result;
 }
diff --git a/poincare/src/trigonometry.cpp b/poincare/src/trigonometry.cpp
index aa4e9c574..5503cbc82 100644
--- a/poincare/src/trigonometry.cpp
+++ b/poincare/src/trigonometry.cpp
@@ -278,7 +278,7 @@ Expression Trigonometry::shallowReduceInverseFunction(Expression & e, Context& c
      *   reduced to undef) */
     if (target == ExpressionNode::ReductionTarget::User || x.isNumber()) {
       Expression sign = SignFunction::Builder(x.clone());
-      Multiplication m0 = Multiplication::Builder(Rational::Builder(1,2), sign, Constant::Builder(KDCodePointGreekSmallLetterPi));
+      Multiplication m0 = Multiplication::Builder(Rational::Builder(1,2), sign, Constant::Builder(UCodePointGreekSmallLetterPi));
       sign.shallowReduce(context, complexFormat, angleUnit, target);
       e.replaceChildAtIndexInPlace(0, x);
       Addition a = Addition::Builder(m0);
@@ -314,7 +314,7 @@ Expression Trigonometry::shallowReduceInverseFunction(Expression & e, Context& c
       // The argument was made positive
       // acos(-x) = π-acos(x)
       if (e.type() == ExpressionNode::Type::ArcCosine) {
-        Expression pi = angleUnit == Preferences::AngleUnit::Radian ? static_cast<Expression>(Constant::Builder(KDCodePointGreekSmallLetterPi)) : static_cast<Expression>(Rational::Builder(180));
+        Expression pi = angleUnit == Preferences::AngleUnit::Radian ? static_cast<Expression>(Constant::Builder(UCodePointGreekSmallLetterPi)) : static_cast<Expression>(Rational::Builder(180));
         Subtraction s = Subtraction::Builder();
         e.replaceWithInPlace(s);
         s.replaceChildAtIndexInPlace(0, pi);
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 5bd450783..efc4d4e50 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -174,12 +174,12 @@ int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferenc
   }
   assert(m_type == Type::Superscript);
   /* If the layout is a superscript, write:
-   * "KDCodePointLeftSuperscript indice KDCodePointRightSuperscript" */
-  int numberOfChar = SerializationHelper::CodePoint(buffer, bufferSize, KDCodePointLeftSuperscript);
+   * "UCodePointLeftSuperscript indice UCodePointRightSuperscript" */
+  int numberOfChar = SerializationHelper::CodePoint(buffer, bufferSize, UCodePointLeftSuperscript);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   numberOfChar += const_cast<VerticalOffsetLayoutNode *>(this)->indiceLayout()->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
-  numberOfChar += SerializationHelper::CodePoint(buffer+numberOfChar, bufferSize-numberOfChar, KDCodePointRightSuperscript);
+  numberOfChar += SerializationHelper::CodePoint(buffer+numberOfChar, bufferSize-numberOfChar, UCodePointRightSuperscript);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
   buffer[numberOfChar] = 0;
diff --git a/poincare/test/expression_order.cpp b/poincare/test/expression_order.cpp
index 66a38132b..c2d4ec606 100644
--- a/poincare/test/expression_order.cpp
+++ b/poincare/test/expression_order.cpp
@@ -38,9 +38,9 @@ QUIZ_CASE(poincare_expression_order) {
   }
   {
     // e + pi + i
-    Expression pi = Constant::Builder(KDCodePointGreekSmallLetterPi);
-    Expression i = Constant::Builder(KDCodePointMathematicalBoldSmallI);
-    Expression e = Constant::Builder(KDCodePointScriptSmallE);
+    Expression pi = Constant::Builder(UCodePointGreekSmallLetterPi);
+    Expression i = Constant::Builder(UCodePointMathematicalBoldSmallI);
+    Expression e = Constant::Builder(UCodePointScriptSmallE);
     constexpr int numberOfChildren = 3;
     Expression children[numberOfChildren] = {pi.clone(), i.clone(), e.clone()};
     Expression childrenSorted[numberOfChildren] = {e, pi, i};
@@ -91,16 +91,16 @@ QUIZ_CASE(poincare_expression_order) {
   }
   {
     // pi^a * pi^b
-    Expression child1 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Symbol::Builder('a'));
-    Expression child2 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Symbol::Builder('b'));
+    Expression child1 = Power::Builder(Constant::Builder(UCodePointGreekSmallLetterPi), Symbol::Builder('a'));
+    Expression child2 = Power::Builder(Constant::Builder(UCodePointGreekSmallLetterPi), Symbol::Builder('b'));
     Expression e1 = Multiplication::Builder(child2.clone(), child1.clone());
     Expression e2 = Multiplication::Builder(child1, child2);
     assert_multiplication_or_addition_is_ordered_as(e1, e2);
   }
   {
     // pi^2 * pi^3
-    Expression child1 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(2));
-    Expression child2 = Power::Builder(Constant::Builder(KDCodePointGreekSmallLetterPi), Rational::Builder(3));
+    Expression child1 = Power::Builder(Constant::Builder(UCodePointGreekSmallLetterPi), Rational::Builder(2));
+    Expression child2 = Power::Builder(Constant::Builder(UCodePointGreekSmallLetterPi), Rational::Builder(3));
     Expression e1 = Multiplication::Builder(child2.clone(), child1.clone());
     Expression e2 = Multiplication::Builder(child1, child2);
     assert_multiplication_or_addition_is_ordered_as(e1, e2);
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index 27b7c272f..5a3171ffc 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -265,11 +265,11 @@ QUIZ_CASE(poincare_parse_layouts) {
   // 2e^3
   l = HorizontalLayout::Builder(
       CodePointLayout::Builder('2'),
-      CodePointLayout::Builder(KDCodePointScriptSmallE),
+      CodePointLayout::Builder(UCodePointScriptSmallE),
       VerticalOffsetLayout::Builder(
         CodePointLayout::Builder('3'),
         VerticalOffsetLayoutNode::Type::Superscript));
-  e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3))));
-  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
+  e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3))));
+  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   assert_parsed_layout_is(l, e);
 }
diff --git a/poincare/test/parser.cpp b/poincare/test/parser.cpp
index c7d7b9f08..136b54165 100644
--- a/poincare/test/parser.cpp
+++ b/poincare/test/parser.cpp
@@ -257,9 +257,9 @@ QUIZ_CASE(poincare_parser_symbols_and_functions) {
 
   // Reserved symbols
   assert_parsed_expression_is("ans", Symbol::Builder("ans", 3));
-  assert_parsed_expression_is("𝐢", Constant::Builder(KDCodePointMathematicalBoldSmallI));
-  assert_parsed_expression_is("π", Constant::Builder(KDCodePointGreekSmallLetterPi));
-  assert_parsed_expression_is("ℯ", Constant::Builder(KDCodePointScriptSmallE));
+  assert_parsed_expression_is("𝐢", Constant::Builder(UCodePointMathematicalBoldSmallI));
+  assert_parsed_expression_is("π", Constant::Builder(UCodePointGreekSmallLetterPi));
+  assert_parsed_expression_is("ℯ", Constant::Builder(UCodePointScriptSmallE));
   assert_parsed_expression_is(Infinity::Name(), Infinity::Builder(false));
   assert_parsed_expression_is(Undefined::Name(), Undefined::Builder());
 
@@ -364,7 +364,7 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("1ans", Multiplication::Builder(Rational::Builder(1),Symbol::Builder("ans", 3)));
   assert_parsed_expression_is("x1", Symbol::Builder("x1", 2));
   assert_parsed_expression_is("1x+2", Addition::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
-  assert_parsed_expression_is("1π", Multiplication::Builder(Rational::Builder(1),Constant::Builder(KDCodePointGreekSmallLetterPi)));
+  assert_parsed_expression_is("1π", Multiplication::Builder(Rational::Builder(1),Constant::Builder(UCodePointGreekSmallLetterPi)));
   assert_parsed_expression_is("1x-2", Subtraction::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1)),Rational::Builder(2)));
   assert_parsed_expression_is("-1x", Opposite::Builder(Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
   assert_parsed_expression_is("2×1x", Multiplication::Builder(Rational::Builder(2),Multiplication::Builder(Rational::Builder(1),Symbol::Builder("x", 1))));
@@ -377,7 +377,7 @@ QUIZ_CASE(poincare_parser_implicit_multiplication) {
   assert_parsed_expression_is("sin(1)2", Multiplication::Builder(Sine::Builder(Rational::Builder(1)),Rational::Builder(2)));
   assert_parsed_expression_is("1cos(2)", Multiplication::Builder(Rational::Builder(1),Cosine::Builder(Rational::Builder(2))));
   assert_parsed_expression_is("1!2", Multiplication::Builder(Factorial::Builder(Rational::Builder(1)),Rational::Builder(2)));
-  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(KDCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
+  assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   Expression m1[] = {Rational::Builder(1)}; Matrix M1 = BuildMatrix(1,1,m1);
   Expression m2[] = {Rational::Builder(2)}; Matrix M2 = BuildMatrix(1,1,m2);
   assert_parsed_expression_is("[[1]][[2]]", Multiplication::Builder(M1,M2));
diff --git a/poincare/test/vertical_offset_layout.cpp b/poincare/test/vertical_offset_layout.cpp
index 1c1846140..d30b58ee2 100644
--- a/poincare/test/vertical_offset_layout.cpp
+++ b/poincare/test/vertical_offset_layout.cpp
@@ -14,7 +14,7 @@ QUIZ_CASE(poincare_vertical_offset_layout_serialize) {
         VerticalOffsetLayoutNode::Type::Superscript
       )
     );
-  assert(KDCodePointLeftSuperscript == '\x12');
-  assert(KDCodePointRightSuperscript == '\x13');
+  assert(UCodePointLeftSuperscript == '\x12');
+  assert(UCodePointRightSuperscript == '\x13');
   assert_expression_layout_serialize_to(layout, "2\x12x+5\x13");
 }

From 90bc0dae87a935a52d20d697ab5d4938eb604266 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 11:21:20 +0100
Subject: [PATCH 040/295] [kandinsky] Comment about the CodePoints array

---
 kandinsky/fonts/code_points.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index 44195cf96..f4edaedfc 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -1,6 +1,10 @@
 // [0x30a].map{|i| "0x" + i.to_s(16) +", // " + [i].pack("U") + " // " + Unicode::Name.of([i].pack("U"))}.join("|")
 #include <stdint.h>
 
+
+/* This array lists the code points that are rasterized by rasterizer.c. We put
+ * most characters from the LATIN charset, and some mathematical characters. */
+
 uint32_t CodePoints[] = {
   0x20, //   // SPACE
   0x21, // ! // EXCLAMATION MARK

From 7b15c302a7791e9da46af65e69680224d88d1a3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 11:31:00 +0100
Subject: [PATCH 041/295] [ion/tests] More UTF8Decoder tests

---
 ion/test/utf8_decoder.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/ion/test/utf8_decoder.cpp b/ion/test/utf8_decoder.cpp
index 56e280fa4..26248502a 100644
--- a/ion/test/utf8_decoder.cpp
+++ b/ion/test/utf8_decoder.cpp
@@ -7,9 +7,21 @@ void assert_decodes_to(const char * string, CodePoint c) {
   quiz_assert(d.nextCodePoint() == 0);
 }
 
-QUIZ_CASE(ion_utf8_decoder) {
+void assert_previous_code_point_is_to(const char * string, const char * stringPosition, CodePoint c) {
+  UTF8Decoder d(string, stringPosition);
+  quiz_assert(d.previousCodePoint() == c);
+}
+
+QUIZ_CASE(ion_utf8_decode_forward) {
   assert_decodes_to("\x20", 0x20);
   assert_decodes_to("\xC2\xA2", 0xA2);
   assert_decodes_to("\xED\x9F\xBF", 0xD7FF);
   assert_decodes_to("\xCC\x81", 0x301);
 }
+
+QUIZ_CASE(ion_utf8_decode_backwards) {
+  const char * a = "abcde";
+  assert_previous_code_point_is_to(a, a+1, *a);
+  assert_previous_code_point_is_to(a, a+4, *(a+3));
+  assert_previous_code_point_is_to(a, a+6, *(a+5));
+}

From 7b5c51b3c3b9d1e0f860b09d366f51b917383a9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 12:02:15 +0100
Subject: [PATCH 042/295] [escher] Fix textfield edition

---
 escher/include/escher/text_area.h  |  1 +
 escher/include/escher/text_field.h |  1 +
 escher/include/escher/text_input.h |  1 +
 escher/src/text_field.cpp          | 17 +++++++++++++----
 escher/src/text_input.cpp          |  4 ++--
 5 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 8bcb1a0b0..b974ae9f9 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -107,6 +107,7 @@ protected:
     KDSize minimalSizeForOptimalDisplay() const override;
     void setText(char * textBuffer, size_t textBufferSize);
     const char * text() const override { return m_text.text(); }
+    const char * editedText() const override { return m_text.text(); }
     size_t editedTextLength() const override { return m_text.textLength(); }
     const Text * getText() const { return &m_text; }
     bool insertTextAtLocation(const char * text, const char * location) override;
diff --git a/escher/include/escher/text_field.h b/escher/include/escher/text_field.h
index 9077e2332..766051bc0 100644
--- a/escher/include/escher/text_field.h
+++ b/escher/include/escher/text_field.h
@@ -41,6 +41,7 @@ protected:
     void drawRect(KDContext * ctx, KDRect rect) const override;
     bool isEditing() const { return m_isEditing; }
     const char * text() const override;
+    const char * editedText() const override { return m_draftTextBuffer; }
     size_t editedTextLength() const override { return m_currentDraftTextLength; } //TODO keep ?
     char * textBuffer() { return m_textBuffer; }
     char * draftTextBuffer() { return m_draftTextBuffer; }
diff --git a/escher/include/escher/text_input.h b/escher/include/escher/text_input.h
index 283d3db90..4406fba4d 100644
--- a/escher/include/escher/text_input.h
+++ b/escher/include/escher/text_input.h
@@ -47,6 +47,7 @@ protected:
       assert(index == 0);
       return &m_cursorView;
     }
+    virtual const char * editedText() const = 0;
     virtual size_t editedTextLength() const = 0;
   };
 protected:
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 66ce9d827..86f83a6ca 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -75,17 +75,22 @@ void TextField::ContentView::setEditing(bool isEditing, bool reinitDrafBuffer) {
   if (m_isEditing == isEditing && !reinitDrafBuffer) {
     return;
   }
+  m_isEditing = isEditing;
   if (reinitDrafBuffer) {
     reinitDraftTextBuffer();
   }
   m_currentDraftTextLength = strlen(m_draftTextBuffer);
-  m_isEditing = isEditing;
+  if (m_cursorTextLocation < m_draftTextBuffer
+      || m_cursorTextLocation > m_draftTextBuffer + m_currentDraftTextLength)
+  {
+    m_cursorTextLocation = m_draftTextBuffer + m_currentDraftTextLength;
+  }
   markRectAsDirty(bounds());
   layoutSubviews();
 }
 
 void TextField::ContentView::reinitDraftTextBuffer() {
-  setCursorTextLocation(text());
+  setCursorTextLocation(m_draftTextBuffer);
   m_draftTextBuffer[0] = 0;
   m_currentDraftTextLength = 0;
 }
@@ -426,21 +431,24 @@ void TextField::scrollToCursor() {
 }
 
 bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
-  assert(isEditing());
   if (event == Ion::Events::Left && isEditing() && cursorTextLocation() > m_contentView.draftTextBuffer()) {
+    assert(isEditing());
     UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
     decoder.previousCodePoint();
     return setCursorTextLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftLeft && isEditing()) {
+    assert(isEditing());
     return setCursorTextLocation(m_contentView.draftTextBuffer());
   }
   if (event == Ion::Events::Right && isEditing() && cursorTextLocation() < m_contentView.draftTextBuffer() + draftTextLength()) {
+    assert(isEditing());
     UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
     decoder.nextCodePoint();
     return setCursorTextLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftRight && isEditing()) {
+    assert(isEditing());
     return setCursorTextLocation(m_contentView.draftTextBuffer() + draftTextLength());
   }
   return false;
@@ -456,7 +464,8 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
   assert(isEditing());
 
   if (eventText[0] == 0) {
-    assert(false); // TODO LEA Does this ever happen?
+    /* For instance, the event might be EXE on a non-editing text field to start
+     * edition. */
     setCursorTextLocation(m_contentView.draftTextBuffer());
     return m_delegate->textFieldDidHandleEvent(this, true, previousTextLength != 0);
   }
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index f8131c21b..da3c72e04 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -8,8 +8,8 @@ static inline const char * max(const char * x, const char * y) { return x > y ?
 
 void TextInput::ContentView::setCursorTextLocation(const char * location) {
   assert(location != nullptr);
-  assert(location >= text());
-  const char * adjustedLocation = min(location, text() + editedTextLength());
+  assert(location >= editedText());
+  const char * adjustedLocation = min(location, editedText() + editedTextLength());
   m_cursorTextLocation = adjustedLocation;
   layoutSubviews();
 }

From cfbb1318add9f54232368cd5d1063c3ca9f13b07 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 14:53:23 +0100
Subject: [PATCH 043/295] [escher] Clean TextView

---
 escher/include/escher/text_view.h | 19 +++++++++++++------
 escher/src/text_view.cpp          | 22 +++-------------------
 2 files changed, 16 insertions(+), 25 deletions(-)

diff --git a/escher/include/escher/text_view.h b/escher/include/escher/text_view.h
index 1677817e8..7c449e22a 100644
--- a/escher/include/escher/text_view.h
+++ b/escher/include/escher/text_view.h
@@ -4,13 +4,20 @@
 #include <escher/view.h>
 #include <kandinsky/color.h>
 
+/* alignment = 0 -> align left or top
+ * alignment = 0.5 -> align center
+ * alignment = 1.0 -> align right or bottom */
+
 class TextView : public View {
 public:
-  // alignment = 0 -> align left or top
-  // alignment = 0.5 -> align center
-  // alignment = 1.0 -> align right or bottom
-  TextView(const KDFont * font = KDFont::LargeFont, float horizontalAlignment = 0.0f, float verticalAlignment = 0.0f,
-    KDColor textColor = KDColorBlack, KDColor backgroundColor = KDColorWhite);
+  TextView(const KDFont * font = KDFont::LargeFont, float horizontalAlignment = 0.0f, float verticalAlignment = 0.0f, KDColor textColor = KDColorBlack, KDColor backgroundColor = KDColorWhite) :
+    View(),
+    m_font(font),
+    m_horizontalAlignment(horizontalAlignment),
+    m_verticalAlignment(verticalAlignment),
+    m_textColor(textColor),
+    m_backgroundColor(backgroundColor)
+  {}
   void drawRect(KDContext * ctx, KDRect rect) const override;
   void setBackgroundColor(KDColor backgroundColor);
   void setTextColor(KDColor textColor);
@@ -22,7 +29,7 @@ public:
   void setFont(const KDFont * font);
 protected:
 #if ESCHER_VIEW_LOGGING
-  const char * className() const override;
+  const char * className() const override { return "TextView"; }
 #endif
   const KDFont * m_font;
   float m_horizontalAlignment;
diff --git a/escher/src/text_view.cpp b/escher/src/text_view.cpp
index b799a8fe0..b8bc1b8e9 100644
--- a/escher/src/text_view.cpp
+++ b/escher/src/text_view.cpp
@@ -1,16 +1,5 @@
 #include <escher/text_view.h>
 
-TextView::TextView(const KDFont * font, float horizontalAlignment, float verticalAlignment,
-    KDColor textColor, KDColor backgroundColor) :
-  View(),
-  m_font(font),
-  m_horizontalAlignment(horizontalAlignment),
-  m_verticalAlignment(verticalAlignment),
-  m_textColor(textColor),
-  m_backgroundColor(backgroundColor)
-{
-}
-
 void TextView::setBackgroundColor(KDColor backgroundColor) {
   m_backgroundColor = backgroundColor;
   markRectAsDirty(bounds());
@@ -44,14 +33,9 @@ void TextView::drawRect(KDContext * ctx, KDRect rect) const {
     return;
   }
   KDSize textSize = m_font->stringSize(text());
-  KDPoint origin(m_horizontalAlignment*(m_frame.width() - textSize.width()),
-    m_verticalAlignment*(m_frame.height() - textSize.height()));
+  KDPoint origin(
+      m_horizontalAlignment * (m_frame.width() - textSize.width()),
+      m_verticalAlignment * (m_frame.height() - textSize.height()));
   ctx->fillRect(bounds(), m_backgroundColor);
   ctx->drawString(text(), origin, m_font, m_textColor, m_backgroundColor);
 }
-
-#if ESCHER_VIEW_LOGGING
-const char * TextView::className() const {
-  return "TextView";
-}
-#endif

From a7b51f92ee4179c28f778d8cb286ec2f35ea974b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 14:53:50 +0100
Subject: [PATCH 044/295] [apps] Remove compilation warning about unused
 variable

---
 apps/code/editor_controller.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apps/code/editor_controller.cpp b/apps/code/editor_controller.cpp
index 11a22cb07..9769f0e23 100644
--- a/apps/code/editor_controller.cpp
+++ b/apps/code/editor_controller.cpp
@@ -124,6 +124,7 @@ void EditorController::saveScript() {
   size_t sizeOfValue = strlen(m_areaBuffer+1)+1+1; // size of scriptContent + size of importation status
   Script::ErrorStatus err = m_script.setValue({.buffer=m_areaBuffer, .size=sizeOfValue});
   assert(err != Script::ErrorStatus::NotEnoughSpaceAvailable && err != Script::ErrorStatus::RecordDoesNotExist); // This should not happen as we set the text area according to the available space in the Kallax
+  (void) err;
 }
 
 }

From 496d3460496dd94f721a867e001529e89c5cbe10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 15:52:10 +0100
Subject: [PATCH 045/295] Remove max/min inline from KDCoordinate header

---
 apps/calculation/calculation.cpp               |  4 +++-
 apps/calculation/history_view_cell.cpp         |  9 ++++++---
 apps/code/console_controller.cpp               |  4 +++-
 apps/code/console_store.cpp                    |  4 ++--
 apps/code/python_text_area.cpp                 |  4 ++--
 apps/graph/graph/graph_controller.cpp          |  4 ++--
 .../list/text_field_function_title_cell.cpp    |  8 ++++----
 apps/probability/calculation_cell.cpp          |  5 ++++-
 apps/regression/calculation_controller.cpp     |  4 ++--
 apps/regression/calculation_controller.h       |  6 +++---
 apps/regression/graph_controller.cpp           | 10 +++++-----
 apps/regression/store.cpp                      | 12 ++++++------
 apps/sequence/list/list_controller.cpp         |  4 ++--
 apps/shared/curve_view.cpp                     |  2 +-
 apps/shared/function_title_cell.cpp            |  8 ++++----
 apps/shared/interactive_curve_view_range.cpp   |  6 +++---
 ...able_exact_approximate_expressions_view.cpp |  6 ++++--
 .../storage_function_list_controller.cpp       | 12 ++++++------
 apps/shared/store_controller.cpp               |  8 ++++----
 apps/solver/solutions_controller.cpp           |  4 +++-
 apps/statistics/histogram_controller.cpp       | 10 +++++-----
 apps/variable_box_controller.cpp               |  4 +++-
 escher/src/expression_field.cpp                |  7 +++++--
 escher/src/expression_view.cpp                 |  4 +++-
 escher/src/layout_field.cpp                    |  6 ++++--
 escher/src/scroll_view.cpp                     |  7 +++++--
 escher/src/scrollable_view.cpp                 | 15 +++++++++------
 escher/src/solid_text_area.cpp                 |  4 +++-
 escher/src/text_input.cpp                      |  8 ++++----
 escher/src/warning_controller.cpp              |  5 ++---
 ion/src/device/usb/dfu_interface.cpp           |  4 ++--
 ion/src/device/usb/stack/device.cpp            |  4 ++--
 ion/src/device/usb/stack/interface.cpp         |  6 +++---
 ion/src/shared/unicode/utf8_helper.cpp         |  4 ++--
 kandinsky/include/kandinsky/coordinate.h       |  3 ---
 kandinsky/src/rect.cpp                         | 15 +++++++++------
 poincare/src/binomial_coefficient_layout.cpp   |  8 ++++----
 poincare/src/bracket_layout.cpp                | 10 +++++-----
 poincare/src/condensed_sum_layout.cpp          | 12 ++++++------
 poincare/src/decimal.cpp                       |  4 +++-
 poincare/src/fraction_layout.cpp               |  4 ++--
 poincare/src/grid_layout.cpp                   | 12 ++++++------
 poincare/src/integer.cpp                       | 13 +++++++------
 poincare/src/integral_layout.cpp               | 12 ++++++------
 poincare/src/layout_cursor.cpp                 |  8 +++++---
 poincare/src/nth_root_layout.cpp               |  6 +++---
 poincare/src/product_layout.cpp                | 14 +++++++-------
 poincare/src/sequence_layout.cpp               | 18 +++++++++---------
 poincare/src/serialization_helper.cpp          |  4 ++--
 poincare/src/sum_layout.cpp                    |  6 +++---
 poincare/src/undefined.cpp                     |  4 +++-
 poincare/src/unreal.cpp                        |  4 +++-
 52 files changed, 204 insertions(+), 165 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 99280e21d..96bac7607 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -12,6 +12,8 @@ using namespace Shared;
 
 namespace Calculation {
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 Calculation::Calculation() :
   m_inputText(),
   m_exactOutputText(),
@@ -71,7 +73,7 @@ KDCoordinate Calculation::height(Context * context) {
     } else {
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
-      KDCoordinate outputHeight = max(exactLayout.baseline(), approximateLayout.baseline()) + max(exactOutputHeight-exactLayout.baseline(), approximateOutputHeight-approximateLayout.baseline());
+      KDCoordinate outputHeight = maxCoordinate(exactLayout.baseline(), approximateLayout.baseline()) + maxCoordinate(exactOutputHeight-exactLayout.baseline(), approximateOutputHeight-approximateLayout.baseline());
       m_height = inputHeight + outputHeight;
     }
   }
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index ff9cb69a4..4ad73a9ef 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -7,6 +7,9 @@
 
 namespace Calculation {
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 /* HistoryViewCellDataSource */
 
 HistoryViewCellDataSource::HistoryViewCellDataSource() :
@@ -99,14 +102,14 @@ void HistoryViewCell::layoutSubviews() {
   m_inputView.setFrame(KDRect(
     0,
     0,
-    min(maxFrameWidth, inputSize.width()),
+    minCoordinate(maxFrameWidth, inputSize.width()),
     inputSize.height()
   ));
   KDSize outputSize = m_scrollableOutputView.minimalSizeForOptimalDisplay();
   m_scrollableOutputView.setFrame(KDRect(
-    max(0, maxFrameWidth - outputSize.width()),
+    maxCoordinate(0, maxFrameWidth - outputSize.width()),
     inputSize.height(),
-    min(maxFrameWidth, outputSize.width()),
+    minCoordinate(maxFrameWidth, outputSize.width()),
     bounds().height() - inputSize.height()
   ));
 }
diff --git a/apps/code/console_controller.cpp b/apps/code/console_controller.cpp
index d325669be..d5da9c826 100644
--- a/apps/code/console_controller.cpp
+++ b/apps/code/console_controller.cpp
@@ -13,6 +13,8 @@ extern "C" {
 
 namespace Code {
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 static const char * sStandardPromptText = ">>> ";
 
 ConsoleController::ConsoleController(Responder * parentResponder, App * pythonDelegate, ScriptStore * scriptStore
@@ -389,7 +391,7 @@ void ConsoleController::autoImportScript(Script script, bool force) {
 
     /* Copy the script name without the extension ".py". The '.' is overwritten
      * by the null terminating char. */
-    int copySizeWithNullTerminatingZero = min(k_maxImportCommandSize - currentChar, strlen(scriptName) - strlen(ScriptStore::k_scriptExtension));
+    int copySizeWithNullTerminatingZero = minInt(k_maxImportCommandSize - currentChar, strlen(scriptName) - strlen(ScriptStore::k_scriptExtension));
     strlcpy(command+currentChar, scriptName, copySizeWithNullTerminatingZero);
     currentChar += copySizeWithNullTerminatingZero-1;
 
diff --git a/apps/code/console_store.cpp b/apps/code/console_store.cpp
index 910ea0bb8..cd3d0445d 100644
--- a/apps/code/console_store.cpp
+++ b/apps/code/console_store.cpp
@@ -3,7 +3,7 @@
 
 namespace Code {
 
-static inline int min(int x, int y) { return (x<y ? x : y); }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 void ConsoleStore::startNewSession() {
   if (k_historySize < 1) {
@@ -103,7 +103,7 @@ void ConsoleStore::push(const char marker, const char * text, size_t length) {
     i = indexOfNullMarker();
   }
   m_history[i] = marker;
-  strlcpy(&m_history[i+1], text, min(k_historySize-(i+1),textLength+1));
+  strlcpy(&m_history[i+1], text, minInt(k_historySize-(i+1),textLength+1));
   m_history[i+1+textLength+1] = 0;
 }
 
diff --git a/apps/code/python_text_area.cpp b/apps/code/python_text_area.cpp
index d99d26e60..e39b7bb43 100644
--- a/apps/code/python_text_area.cpp
+++ b/apps/code/python_text_area.cpp
@@ -18,7 +18,7 @@ constexpr KDColor OperatorColor = KDColor::RGB24(0xd73a49);
 constexpr KDColor StringColor = KDColor::RGB24(0x032f62);
 constexpr KDColor BackgroundColor = KDColorWhite;
 
-static inline int min(int x, int y) { return x < y ? x : y; }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 static inline KDColor TokenColor(mp_token_kind_t tokenKind) {
   if (tokenKind == MP_TOKEN_STRING) {
@@ -104,7 +104,7 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
       line,
       fromColumn,
       text + fromColumn,
-      min(length - fromColumn, toColumn - fromColumn),
+      minInt(length - fromColumn, toColumn - fromColumn),
       StringColor,
       BackgroundColor
     );
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index caf46381a..5c680b50f 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -5,7 +5,7 @@ using namespace Shared;
 
 namespace Graph {
 
-static inline float max(float x, float y) { return (x>y ? x : y); }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
   StorageFunctionGraphController(parentResponder, inputEventHandlerDelegate, header, curveViewRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
@@ -46,7 +46,7 @@ float GraphController::interestingXHalfRange() const {
     ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     float fRange = f->expressionReduced(myApp->localContext()).characteristicXRange(*(myApp->localContext()), Poincare::Preferences::sharedPreferences()->angleUnit());
     if (!std::isnan(fRange)) {
-      characteristicRange = max(fRange, characteristicRange);
+      characteristicRange = maxFloat(fRange, characteristicRange);
     }
   }
   return (characteristicRange > 0.0f ? 1.6f*characteristicRange : InteractiveCurveViewRangeDelegate::interestingXHalfRange());
diff --git a/apps/graph/list/text_field_function_title_cell.cpp b/apps/graph/list/text_field_function_title_cell.cpp
index 405053675..12c2df521 100644
--- a/apps/graph/list/text_field_function_title_cell.cpp
+++ b/apps/graph/list/text_field_function_title_cell.cpp
@@ -4,8 +4,8 @@
 
 namespace Graph {
 
-static inline float min(float x, float y) { return (x<y ? x : y); }
-static inline float max(float x, float y) { return (x>y ? x : y); }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 TextFieldFunctionTitleCell::TextFieldFunctionTitleCell(StorageListController * listController, Orientation orientation, const KDFont * font) :
   Shared::FunctionTitleCell(orientation),
@@ -57,9 +57,9 @@ void TextFieldFunctionTitleCell::layoutSubviews() {
   KDRect frame = subviewFrame();
   m_textField.setFrame(frame);
   KDCoordinate maxTextFieldX = frame.width() - m_textField.minimalSizeForOptimalDisplay().width();
-  float horizontalAlignment = max(
+  float horizontalAlignment = maxFloat(
       0.0f,
-      min(
+      minFloat(
         1.0f,
         ((float)(maxTextFieldX - k_textFieldRightMargin))/((float)maxTextFieldX)));
   m_textField.setAlignment(horizontalAlignment, verticalAlignment());
diff --git a/apps/probability/calculation_cell.cpp b/apps/probability/calculation_cell.cpp
index 9b18129ac..c23355938 100644
--- a/apps/probability/calculation_cell.cpp
+++ b/apps/probability/calculation_cell.cpp
@@ -5,6 +5,9 @@
 
 namespace Probability {
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 CalculationCell::CalculationCell(Responder * parentResponder, char * draftTextBuffer, InputEventHandlerDelegate * inputEventHandlerDelegate, TextFieldDelegate * textFieldDelegate) :
   m_text(KDFont::LargeFont, I18n::Message::Default, 0.5f, 0.5f),
   m_calculation(parentResponder, inputEventHandlerDelegate, textFieldDelegate, draftTextBuffer),
@@ -75,7 +78,7 @@ KDCoordinate CalculationCell::calculationCellWidth() const {
   KDCoordinate glyphWidth = KDFont::LargeFont->glyphSize().width();
   KDCoordinate minTextFieldWidth = 4 * glyphWidth + TextCursorView::k_width;
   KDCoordinate maxTextFieldWidth = 14 * glyphWidth + TextCursorView::k_width;
-  return min(maxTextFieldWidth, max(minTextFieldWidth, calculationCellWidth));
+  return minCoordinate(maxTextFieldWidth, maxCoordinate(minTextFieldWidth, calculationCellWidth));
 }
 
 }
diff --git a/apps/regression/calculation_controller.cpp b/apps/regression/calculation_controller.cpp
index 02446c0f3..7a7bfce1b 100644
--- a/apps/regression/calculation_controller.cpp
+++ b/apps/regression/calculation_controller.cpp
@@ -11,7 +11,7 @@ using namespace Shared;
 
 namespace Regression {
 
-static inline int max(int x, int y) { return (x>y ? x : y); }
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
 
 CalculationController::CalculationController(Responder * parentResponder, ButtonRowController * header, Store * store) :
   TabTableController(parentResponder),
@@ -354,7 +354,7 @@ int CalculationController::maxNumberOfCoefficients() const {
   int numberOfDefinedSeries = m_store->numberOfNonEmptySeries();
   for (int i = 0; i < numberOfDefinedSeries; i++) {
     int currentNumberOfCoefs = m_store->modelForSeries(m_store->indexOfKthNonEmptySeries(i))->numberOfCoefficients();
-    maxNumberCoefficients = max(maxNumberCoefficients, currentNumberOfCoefs);
+    maxNumberCoefficients = maxInt(maxNumberCoefficients, currentNumberOfCoefs);
   }
   return maxNumberCoefficients;
 }
diff --git a/apps/regression/calculation_controller.h b/apps/regression/calculation_controller.h
index d9bfc1290..e59265a62 100644
--- a/apps/regression/calculation_controller.h
+++ b/apps/regression/calculation_controller.h
@@ -14,7 +14,7 @@
 
 namespace Regression {
 
-constexpr static size_t max(KDCoordinate a, KDCoordinate b) { return a > b ? a : b; }
+constexpr static KDCoordinate maxCoordinate(KDCoordinate a, KDCoordinate b) { return a > b ? a : b; }
 
 class CalculationController : public Shared::TabTableController, public TableViewDataSource, public SelectableTableViewDelegate, public ButtonRowDelegate, public AlternateEmptyViewDefaultDelegate  {
 
@@ -65,8 +65,8 @@ private:
   static constexpr KDCoordinate k_titleCalculationCellWidth = Ion::Display::Width/2 - Metric::CommonRightMargin/2 - Metric::CommonLeftMargin/2;
   // TODO: change 7 for KDFont::SmallFont->glyphSize().width()
   static constexpr KDCoordinate k_minCalculationCellWidth = 7*2*(Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)); //Calculation width should at least be able to hold to numbers with LargeNumberOfSignificantDigits.
-  static constexpr KDCoordinate k_cubicCalculationCellWidth = max(150, k_minCalculationCellWidth); // Should hold aX^3+bX^2+cX+d
-  static constexpr KDCoordinate k_quarticCalculationCellWidth = max(195, k_minCalculationCellWidth ); // Should hold ? aX^4+bX^3+c*X^2+dX+e
+  static constexpr KDCoordinate k_cubicCalculationCellWidth = maxCoordinate(150, k_minCalculationCellWidth); // Should hold aX^3+bX^2+cX+d
+  static constexpr KDCoordinate k_quarticCalculationCellWidth = maxCoordinate(195, k_minCalculationCellWidth ); // Should hold ? aX^4+bX^3+c*X^2+dX+e
   static constexpr KDCoordinate k_margin = 8;
   static constexpr KDCoordinate k_r2CellMargin = 2;
   static constexpr KDCoordinate k_scrollBarMargin = Metric::CommonRightMargin;
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 3d8a8a807..1071bde56 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -7,9 +7,9 @@
 using namespace Poincare;
 using namespace Shared;
 
-static inline float min(float x, float y) { return (x<y ? x : y); }
-static inline float max(float x, float y) { return (x>y ? x : y); }
-static inline int maxInt(int x, int y) { return (x>y ? x : y); }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
 
 namespace Regression {
 
@@ -400,8 +400,8 @@ InteractiveCurveViewRangeDelegate::Range GraphController::computeYRange(Interact
   for (int series = 0; series < Store::k_numberOfSeries; series++) {
     for (int k = 0; k < m_store->numberOfPairsOfSeries(series); k++) {
       if (m_store->xMin() <= m_store->get(series, 0, k) && m_store->get(series, 0, k) <= m_store->xMax()) {
-        minY = min(minY, m_store->get(series, 1, k));
-        maxY = max(maxY, m_store->get(series, 1, k));
+        minY = minFloat(minY, m_store->get(series, 1, k));
+        maxY = maxFloat(maxY, m_store->get(series, 1, k));
       }
     }
   }
diff --git a/apps/regression/store.cpp b/apps/regression/store.cpp
index be6894ea8..5e342a999 100644
--- a/apps/regression/store.cpp
+++ b/apps/regression/store.cpp
@@ -10,8 +10,8 @@ using namespace Shared;
 
 namespace Regression {
 
-static inline float max(float x, float y) { return (x>y ? x : y); }
-static inline float min(float x, float y) { return (x<y ? x : y); }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
 
 static_assert(Model::k_numberOfModels == 9, "Number of models changed, Regression::Store() needs to adapt");
 static_assert(Store::k_numberOfSeries == 3, "Number of series changed, Regression::Store() needs to adapt (m_seriesChecksum)");
@@ -144,8 +144,8 @@ void Store::setDefault() {
   float maxX = -FLT_MAX;
   for (int series = 0; series < k_numberOfSeries; series++) {
     if (!seriesIsEmpty(series)) {
-      minX = min(minX, minValueOfColumn(series, 0));
-      maxX = max(maxX, maxValueOfColumn(series, 0));
+      minX = minFloat(minX, minValueOfColumn(series, 0));
+      maxX = maxFloat(maxX, maxValueOfColumn(series, 0));
     }
   }
   float range = maxX - minX;
@@ -191,7 +191,7 @@ double Store::doubleCastedNumberOfPairsOfSeries(int series) const {
 float Store::maxValueOfColumn(int series, int i) const {
   float maxColumn = -FLT_MAX;
   for (int k = 0; k < numberOfPairsOfSeries(series); k++) {
-    maxColumn = max(maxColumn, m_data[series][i][k]);
+    maxColumn = maxFloat(maxColumn, m_data[series][i][k]);
   }
   return maxColumn;
 }
@@ -199,7 +199,7 @@ float Store::maxValueOfColumn(int series, int i) const {
 float Store::minValueOfColumn(int series, int i) const {
   float minColumn = FLT_MAX;
   for (int k = 0; k < numberOfPairsOfSeries(series); k++) {
-    minColumn = min(minColumn, m_data[series][i][k]);
+    minColumn = minFloat(minColumn, m_data[series][i][k]);
   }
   return minColumn;
 }
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 0348a4c00..86c73fba8 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -5,7 +5,7 @@
 using namespace Shared;
 using namespace Poincare;
 
-//TODO static inline KDCoordinate max(KDCoordinate c1, KDCoordinate c2) { return c1 > c2 ? c1 : c2; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 namespace Sequence {
 
@@ -74,7 +74,7 @@ KDCoordinate ListController::expressionRowHeight(int j) {
     return defaultHeight;
   }
   KDCoordinate sequenceHeight = layout.layoutSize().height();
-  return max(defaultHeight, sequenceHeight + 2*k_expressionCellVerticalMargin);
+  return maxCoordinate(defaultHeight, sequenceHeight + 2*k_expressionCellVerticalMargin);
 }
 
 void ListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
diff --git a/apps/shared/curve_view.cpp b/apps/shared/curve_view.cpp
index d60a29130..58fe73a65 100644
--- a/apps/shared/curve_view.cpp
+++ b/apps/shared/curve_view.cpp
@@ -10,7 +10,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-static inline int minInt(int x, int y) { return (x < y ? x : y); }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 CurveView::CurveView(CurveViewRange * curveViewRange, CurveViewCursor * curveViewCursor, BannerView * bannerView,
     View * cursorView, View * okView, bool displayBanner) :
diff --git a/apps/shared/function_title_cell.cpp b/apps/shared/function_title_cell.cpp
index b32a7b4ea..17e640e3c 100644
--- a/apps/shared/function_title_cell.cpp
+++ b/apps/shared/function_title_cell.cpp
@@ -3,8 +3,8 @@
 
 namespace Shared {
 
-static inline float min(float x, float y) { return (x<y ? x : y); }
-static inline float max(float x, float y) { return (x>y ? x : y); }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 void FunctionTitleCell::setOrientation(Orientation orientation) {
   m_orientation = orientation;
@@ -51,9 +51,9 @@ KDRect FunctionTitleCell::subviewFrame() const {
 
 float FunctionTitleCell::verticalAlignment() const {
   assert(m_orientation == Orientation::VerticalIndicator);
-  return max(
+  return maxFloat(
       0.0f,
-      min(
+      minFloat(
         1.0f,
         m_baseline < 0 ? 0.5f : verticalAlignmentGivenExpressionBaselineAndRowHeight(m_baseline, subviewFrame().height())));
 }
diff --git a/apps/shared/interactive_curve_view_range.cpp b/apps/shared/interactive_curve_view_range.cpp
index 41eee5e59..7bf8f63eb 100644
--- a/apps/shared/interactive_curve_view_range.cpp
+++ b/apps/shared/interactive_curve_view_range.cpp
@@ -10,8 +10,8 @@ using namespace Poincare;
 
 namespace Shared {
 
-static inline float min(float x, float y) { return (x<y ? x : y); }
-static inline float max(float x, float y) { return (x>y ? x : y); }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 uint32_t InteractiveCurveViewRange::rangeChecksum() {
   float data[5] = {m_xMin, m_xMax, m_yMin, m_yMax, m_yAuto ? 1.0f : 0.0f};
@@ -217,7 +217,7 @@ bool InteractiveCurveViewRange::isCursorVisible(float topMarginRatio, float righ
 float InteractiveCurveViewRange::clipped(float x, bool isMax) {
   float maxF = isMax ? k_upperMaxFloat : k_lowerMaxFloat;
   float minF = isMax ? -k_lowerMaxFloat : -k_upperMaxFloat;
-  return max(minF, min(x, maxF));
+  return maxFloat(minF, minFloat(x, maxF));
 }
 
 void InteractiveCurveViewRange::notifyRangeChange() {
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index fc86fcfed..0e003e857 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -5,6 +5,8 @@ using namespace Poincare;
 
 namespace Shared {
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 ScrollableExactApproximateExpressionsView::ContentCell::ContentCell() :
   m_rightExpressionView(),
   m_approximateSign(KDFont::LargeFont, I18n::Message::AlmostEqual, 0.5f, 0.5f, Palette::GreyVeryDark),
@@ -51,7 +53,7 @@ KDSize ScrollableExactApproximateExpressionsView::ContentCell::minimalSizeForOpt
   KDSize leftExpressionSize = m_leftExpressionView.minimalSizeForOptimalDisplay();
   KDCoordinate leftBaseline = m_leftExpressionView.layout().baseline();
   KDCoordinate rightBaseline = m_rightExpressionView.layout().baseline();
-  KDCoordinate height = max(leftBaseline, rightBaseline) + max(leftExpressionSize.height()-leftBaseline, rightExpressionSize.height()-rightBaseline);
+  KDCoordinate height = maxCoordinate(leftBaseline, rightBaseline) + maxCoordinate(leftExpressionSize.height()-leftBaseline, rightExpressionSize.height()-rightBaseline);
   KDSize approximateSignSize = m_approximateSign.minimalSizeForOptimalDisplay();
   return KDSize(leftExpressionSize.width()+approximateSignSize.width()+rightExpressionSize.width()+2*Metric::CommonLargeMargin, height);
 }
@@ -90,7 +92,7 @@ void ScrollableExactApproximateExpressionsView::ContentCell::layoutSubviews() {
   }
   KDCoordinate leftBaseline = m_leftExpressionView.layout().baseline();
   KDCoordinate rightBaseline = m_rightExpressionView.layout().baseline();
-  KDCoordinate baseline = max(leftBaseline, rightBaseline);
+  KDCoordinate baseline = maxCoordinate(leftBaseline, rightBaseline);
   KDSize leftExpressionSize = m_leftExpressionView.minimalSizeForOptimalDisplay();
   KDSize approximateSignSize = m_approximateSign.minimalSizeForOptimalDisplay();
   m_leftExpressionView.setFrame(KDRect(0, baseline-leftBaseline, leftExpressionSize));
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index da9c3ef31..035e1215d 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -3,8 +3,8 @@
 
 namespace Shared {
 
-static inline int max(int x, int y) { return x > y ? x : y; }
-static inline int min(int x, int y) { return x < y ? x : y; }
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 StorageFunctionListController::StorageFunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
   StorageExpressionModelListController(parentResponder, text),
@@ -104,7 +104,7 @@ int StorageFunctionListController::indexFromCumulatedHeight(KDCoordinate offsetY
 
   KDCoordinate currentCumulatedHeight = cumulatedHeightFromIndex(currentSelectedRow);
   if (offsetY > currentCumulatedHeight) {
-    int iMax = min(k_memoizedCellsCount/2 + 1, rowsCount - currentSelectedRow);
+    int iMax = minInt(k_memoizedCellsCount/2 + 1, rowsCount - currentSelectedRow);
     for (int i = 0; i < iMax; i++) {
       currentCumulatedHeight+= rowHeight(currentSelectedRow + i);
       if (offsetY <= currentCumulatedHeight) {
@@ -112,7 +112,7 @@ int StorageFunctionListController::indexFromCumulatedHeight(KDCoordinate offsetY
       }
     }
   } else {
-    int iMax = min(k_memoizedCellsCount/2, currentSelectedRow);
+    int iMax = minInt(k_memoizedCellsCount/2, currentSelectedRow);
     for (int i = 1; i <= iMax; i++) {
       currentCumulatedHeight-= rowHeight(currentSelectedRow-i);
       if (offsetY > currentCumulatedHeight) {
@@ -285,7 +285,7 @@ void StorageFunctionListController::computeTitlesColumnWidth(bool forceMax) {
     return;
   }
   KDCoordinate maxTitleWidth = maxFunctionNameWidth()+k_functionTitleSumOfMargins;
-  m_titlesColumnWidth = max(maxTitleWidth, k_minTitleColumnWidth);
+  m_titlesColumnWidth = maxInt(maxTitleWidth, k_minTitleColumnWidth);
 }
 
 TabViewController * StorageFunctionListController::tabController() const {
@@ -310,7 +310,7 @@ KDCoordinate StorageFunctionListController::maxFunctionNameWidth() {
     const char * functionName = record.fullName();
     const char * dotPosition = strchr(functionName, Ion::Storage::k_dotChar);
     assert(dotPosition != nullptr);
-    maxNameLength = max(maxNameLength, dotPosition-functionName);
+    maxNameLength = maxInt(maxNameLength, dotPosition-functionName);
   }
   return nameWidth(maxNameLength + StorageFunction::k_parenthesedArgumentLength);
 }
diff --git a/apps/shared/store_controller.cpp b/apps/shared/store_controller.cpp
index 57e01033b..8352c627b 100644
--- a/apps/shared/store_controller.cpp
+++ b/apps/shared/store_controller.cpp
@@ -7,8 +7,8 @@
 
 using namespace Poincare;
 
-static inline int min(int x, int y) { return (x<y ? x : y); }
-static inline int max(int x, int y) { return (x>y ? x : y); }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
 
 namespace Shared {
 
@@ -255,7 +255,7 @@ double StoreController::dataAtLocation(int columnIndex, int rowIndex) {
 int StoreController::numberOfElements() {
   int result = 0;
   for (int i = 0; i < DoublePairStore::k_numberOfSeries; i++) {
-    result = max(result, m_store->numberOfPairsOfSeries(i));
+    result = maxInt(result, m_store->numberOfPairsOfSeries(i));
   }
   return result;
 }
@@ -284,7 +284,7 @@ bool StoreController::privateFillColumnWithFormula(Expression formula, Expressio
     if (numberOfValuesToCompute == -1) {
       numberOfValuesToCompute = m_store->numberOfPairsOfSeries(series);
     } else {
-      numberOfValuesToCompute = min(numberOfValuesToCompute, m_store->numberOfPairsOfSeries(series));
+      numberOfValuesToCompute = minInt(numberOfValuesToCompute, m_store->numberOfPairsOfSeries(series));
     }
     index++;
   }
diff --git a/apps/solver/solutions_controller.cpp b/apps/solver/solutions_controller.cpp
index c3b9ae56a..68041e423 100644
--- a/apps/solver/solutions_controller.cpp
+++ b/apps/solver/solutions_controller.cpp
@@ -15,6 +15,8 @@ using namespace Shared;
 
 namespace Solver {
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 SolutionsController::ContentView::ContentView(SolutionsController * controller) :
   m_warningMessageView0(KDFont::SmallFont, I18n::Message::Default, 0.5f, 0.5f, KDColorBlack, Palette::WallScreenDark),
   m_warningMessageView1(KDFont::SmallFont, I18n::Message::Default, 0.5f, 0.5f, KDColorBlack, Palette::WallScreenDark),
@@ -219,7 +221,7 @@ KDCoordinate SolutionsController::rowHeight(int j) {
   Poincare::Layout approximateLayout = m_equationStore->exactSolutionLayoutAtIndex(j, false);
   KDCoordinate exactLayoutHeight = exactLayout.layoutSize().height();
   KDCoordinate approximateLayoutHeight = approximateLayout.layoutSize().height();
-  KDCoordinate layoutHeight = max(exactLayout.baseline(), approximateLayout.baseline()) + max(exactLayoutHeight-exactLayout.baseline(), approximateLayoutHeight-approximateLayout.baseline());
+  KDCoordinate layoutHeight = maxCoordinate(exactLayout.baseline(), approximateLayout.baseline()) + maxCoordinate(exactLayoutHeight-exactLayout.baseline(), approximateLayoutHeight-approximateLayout.baseline());
   return layoutHeight + 2 * Metric::CommonSmallMargin;
 }
 
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index b4e1a22e9..1bdcd35e5 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -11,8 +11,8 @@ using namespace Shared;
 
 namespace Statistics {
 
-static inline float min(float x, float y) { return (x<y ? x : y); }
-static inline float max(float x, float y) { return (x>y ? x : y); }
+static inline float minFloat(float x, float y) { return x < y ? x : y; }
+static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 HistogramController::HistogramController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, Store * store, uint32_t * storeVersion, uint32_t * barVersion, uint32_t * rangeVersion, int * selectedBarIndex, int * selectedSeriesIndex) :
   MultipleDataViewController(parentResponder, store, selectedBarIndex, selectedSeriesIndex),
@@ -191,7 +191,7 @@ void HistogramController::initRangeParameters() {
   float maxValue = -FLT_MAX;
   for (int i = 0; i < Store::k_numberOfSeries; i ++) {
     if (!m_store->seriesIsEmpty(i)) {
-      maxValue = max(maxValue, m_store->maxValue(i));
+      maxValue = maxFloat(maxValue, m_store->maxValue(i));
     }
   }
   float barWidth = m_store->barWidth();
@@ -244,8 +244,8 @@ void HistogramController::initBarParameters() {
   float maxValue = -FLT_MAX;
   for (int i = 0; i < Store::k_numberOfSeries; i ++) {
     if (!m_store->seriesIsEmpty(i)) {
-      minValue = min(minValue, m_store->minValue(i));
-      maxValue = max(maxValue, m_store->maxValue(i));
+      minValue = minFloat(minValue, m_store->minValue(i));
+      maxValue = maxFloat(maxValue, m_store->maxValue(i));
     }
   }
   maxValue = minValue >= maxValue ? minValue + std::pow(10.0f, std::floor(std::log10(std::fabs(minValue)))-1.0f) : maxValue;
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 4499032b4..80c919086 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -15,6 +15,8 @@ using namespace Poincare;
 using namespace Shared;
 using namespace Ion;
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 VariableBoxController::VariableBoxController() :
   NestedMenuController(nullptr, I18n::Message::Variables),
   m_currentPage(Page::RootMenu),
@@ -124,7 +126,7 @@ KDCoordinate VariableBoxController::rowHeight(int index) {
   if (m_currentPage != Page::RootMenu) {
     Layout layoutR = expressionLayoutForRecord(recordAtIndex(index), index);
     if (!layoutR.isUninitialized()) {
-      return max(layoutR.layoutSize().height()+k_leafMargin, Metric::ToolboxRowHeight);
+      return maxCoordinate(layoutR.layoutSize().height()+k_leafMargin, Metric::ToolboxRowHeight);
     }
   }
   return NestedMenuController::rowHeight(index);
diff --git a/escher/src/expression_field.cpp b/escher/src/expression_field.cpp
index 2fa9ee575..4f06d9dd0 100644
--- a/escher/src/expression_field.cpp
+++ b/escher/src/expression_field.cpp
@@ -2,6 +2,9 @@
 #include <poincare/preferences.h>
 #include <assert.h>
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 ExpressionField::ExpressionField(Responder * parentResponder, char * textBuffer, int textBufferLength, InputEventHandlerDelegate * inputEventHandlerDelegate, TextFieldDelegate * textFieldDelegate, LayoutFieldDelegate * layoutFieldDelegate) :
   Responder(parentResponder),
   View(),
@@ -109,8 +112,8 @@ bool ExpressionField::handleEventWithText(const char * text, bool indentation, b
 KDCoordinate ExpressionField::inputViewHeight() const {
   return k_separatorThickness
     + (editionIsInTextField() ? k_textFieldHeight :
-        min(maximalHeight(),
-          max(k_textFieldHeight, m_layoutField.minimalSizeForOptimalDisplay().height() + 2*k_verticalMargin )));
+        minCoordinate(maximalHeight(),
+          maxCoordinate(k_textFieldHeight, m_layoutField.minimalSizeForOptimalDisplay().height() + 2*k_verticalMargin)));
 }
 
 KDCoordinate ExpressionField::maximalHeight() const {
diff --git a/escher/src/expression_view.cpp b/escher/src/expression_view.cpp
index cb81588bf..6360470f8 100644
--- a/escher/src/expression_view.cpp
+++ b/escher/src/expression_view.cpp
@@ -1,6 +1,8 @@
 #include <escher/expression_view.h>
 using namespace Poincare;
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 ExpressionView::ExpressionView(float horizontalAlignment, float verticalAlignment,
     KDColor textColor, KDColor backgroundColor) :
   m_layout(),
@@ -51,7 +53,7 @@ KDSize ExpressionView::minimalSizeForOptimalDisplay() const {
 
 KDPoint ExpressionView::drawingOrigin() const {
   KDSize expressionSize = m_layout.layoutSize();
-  return KDPoint(m_horizontalMargin + m_horizontalAlignment*(m_frame.width() - 2*m_horizontalMargin - expressionSize.width()), max(0, m_verticalAlignment*(m_frame.height() - expressionSize.height())));
+  return KDPoint(m_horizontalMargin + m_horizontalAlignment*(m_frame.width() - 2*m_horizontalMargin - expressionSize.width()), maxCoordinate(0, m_verticalAlignment*(m_frame.height() - expressionSize.height())));
 }
 
 KDPoint ExpressionView::absoluteDrawingOrigin() const {
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index 38059d33a..3f2abcbff 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -9,6 +9,8 @@
 
 using namespace Poincare;
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+
 LayoutField::ContentView::ContentView() :
   m_cursor(),
   m_expressionView(0.0f, 0.5f, KDColorBlack, KDColorWhite),
@@ -276,8 +278,8 @@ void LayoutField::scrollToBaselinedRect(KDRect rect, KDCoordinate baseline) {
   scrollToContentRect(rect, true);
   // Show the rect area around its baseline
   KDCoordinate underBaseline = rect.height() - baseline;
-  KDCoordinate minAroundBaseline = min(baseline, underBaseline);
-  minAroundBaseline = min(minAroundBaseline, bounds().height() / 2);
+  KDCoordinate minAroundBaseline = minCoordinate(baseline, underBaseline);
+  minAroundBaseline = minCoordinate(minAroundBaseline, bounds().height() / 2);
   KDRect balancedRect(rect.x(), rect.y() + baseline - minAroundBaseline, rect.width(), 2 * minAroundBaseline);
   scrollToContentRect(balancedRect, true);
 }
diff --git a/escher/src/scroll_view.cpp b/escher/src/scroll_view.cpp
index 75d07ec11..cd01a7afc 100644
--- a/escher/src/scroll_view.cpp
+++ b/escher/src/scroll_view.cpp
@@ -7,6 +7,9 @@ extern "C" {
 #include <assert.h>
 }
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 ScrollView::ScrollView(View * contentView, ScrollViewDataSource * dataSource) :
   View(),
   m_contentView(contentView),
@@ -70,8 +73,8 @@ void ScrollView::scrollToContentPoint(KDPoint p, bool allowOverscroll) {
 
   /* Handle cases when the size of the view has decreased. */
   setContentOffset(KDPoint(
-    min(contentOffset().x(), max(minimalSizeForOptimalDisplay().width() - bounds().width(), 0)),
-    min(contentOffset().y(), max(minimalSizeForOptimalDisplay().height() - bounds().height(), 0))
+    minCoordinate(contentOffset().x(), maxCoordinate(minimalSizeForOptimalDisplay().width() - bounds().width(), 0)),
+    minCoordinate(contentOffset().y(), maxCoordinate(minimalSizeForOptimalDisplay().height() - bounds().height(), 0))
   ));
 }
 
diff --git a/escher/src/scrollable_view.cpp b/escher/src/scrollable_view.cpp
index f2781fa32..9efc0fd1e 100644
--- a/escher/src/scrollable_view.cpp
+++ b/escher/src/scrollable_view.cpp
@@ -2,6 +2,9 @@
 #include <escher/metric.h>
 #include <assert.h>
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 ScrollableView::ScrollableView(Responder * parentResponder, View * view, ScrollViewDataSource * dataSource) :
   Responder(parentResponder),
   ScrollView(view, dataSource),
@@ -15,25 +18,25 @@ bool ScrollableView::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Left) {
     KDCoordinate movementToEdge = m_manualScrollingOffset.x();
     if (movementToEdge > 0) {
-      translation = KDPoint(-min(Metric::ScrollStep, movementToEdge), 0);
+      translation = KDPoint(-minCoordinate(Metric::ScrollStep, movementToEdge), 0);
     }
   }
   if (event == Ion::Events::Right) {
     KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().width() - bounds().width() - m_manualScrollingOffset.x();
     if (movementToEdge > 0) {
-      translation = KDPoint(min(Metric::ScrollStep, movementToEdge), 0);
+      translation = KDPoint(minCoordinate(Metric::ScrollStep, movementToEdge), 0);
     }
   }
   if (event == Ion::Events::Up) {
     KDCoordinate movementToEdge = m_manualScrollingOffset.y();
     if (movementToEdge > 0) {
-      translation = KDPoint(0, -min(Metric::ScrollStep, movementToEdge));
+      translation = KDPoint(0, -minCoordinate(Metric::ScrollStep, movementToEdge));
     }
   }
   if (event == Ion::Events::Down) {
     KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().height() - bounds().height() - m_manualScrollingOffset.y();
     if (movementToEdge > 0) {
-      translation = KDPoint(0, min(Metric::ScrollStep, movementToEdge));
+      translation = KDPoint(0, minCoordinate(Metric::ScrollStep, movementToEdge));
     }
   }
   if (translation != KDPointZero) {
@@ -51,7 +54,7 @@ void ScrollableView::reloadScroll(bool forceReLayout) {
 
 KDSize ScrollableView::contentSize() const {
   KDSize viewSize = ScrollView::contentSize();
-  KDCoordinate viewWidth = max(viewSize.width(), maxContentWidthDisplayableWithoutScrolling());
-  KDCoordinate viewHeight = max(viewSize.height(), maxContentHeightDisplayableWithoutScrolling());
+  KDCoordinate viewWidth = maxCoordinate(viewSize.width(), maxContentWidthDisplayableWithoutScrolling());
+  KDCoordinate viewHeight = maxCoordinate(viewSize.height(), maxContentHeightDisplayableWithoutScrolling());
   return KDSize(viewWidth, viewHeight);
 }
diff --git a/escher/src/solid_text_area.cpp b/escher/src/solid_text_area.cpp
index 3b58214ac..b115c9f99 100644
--- a/escher/src/solid_text_area.cpp
+++ b/escher/src/solid_text_area.cpp
@@ -1,5 +1,7 @@
 #include <escher/solid_text_area.h>
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 void SolidTextArea::ContentView::clearRect(KDContext * ctx, KDRect rect) const {
   ctx->fillRect(rect, m_backgroundColor);
 }
@@ -10,7 +12,7 @@ void SolidTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
     line,
     fromColumn,
     text + fromColumn,
-    min(length - fromColumn, toColumn - fromColumn),
+    minInt(length - fromColumn, toColumn - fromColumn),
     m_textColor,
     m_backgroundColor
   );
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index da3c72e04..4fc3684fa 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -3,13 +3,13 @@
 
 /* TextInput::ContentView */
 
-static inline const char * min(const char * x, const char * y) { return x < y ? x : y; }
-static inline const char * max(const char * x, const char * y) { return x > y ? x : y; }
+static inline const char * minCharPointer(const char * x, const char * y) { return x < y ? x : y; }
+static inline const char * maxCharPointer(const char * x, const char * y) { return x > y ? x : y; }
 
 void TextInput::ContentView::setCursorTextLocation(const char * location) {
   assert(location != nullptr);
   assert(location >= editedText());
-  const char * adjustedLocation = min(location, editedText() + editedTextLength());
+  const char * adjustedLocation = minCharPointer(location, editedText() + editedTextLength());
   m_cursorTextLocation = adjustedLocation;
   layoutSubviews();
 }
@@ -70,7 +70,7 @@ void TextInput::scrollToCursor() {
 
 bool TextInput::setCursorTextLocation(const char * location) {
   assert(location != nullptr);
-  const char * adjustedLocation = max(location, text());
+  const char * adjustedLocation = maxCharPointer(location, text());
   willSetCursorTextLocation(&adjustedLocation);
   contentView()->setCursorTextLocation(adjustedLocation);
   scrollToCursor();
diff --git a/escher/src/warning_controller.cpp b/escher/src/warning_controller.cpp
index 65d626406..bbb5cf098 100644
--- a/escher/src/warning_controller.cpp
+++ b/escher/src/warning_controller.cpp
@@ -1,8 +1,7 @@
 #include <escher/warning_controller.h>
 #include <escher/app.h>
 
-// TODO un-comment once we remove max defifinion from KDCoordinate header
-// static inline KDCoordinate max(KDCoordinate c1, KDCoordinate c2) { c1 < c2 ? c2 : c1; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 WarningController::ContentView::ContentView() :
   SolidColorView(KDColorBlack),
@@ -47,7 +46,7 @@ KDSize WarningController::ContentView::minimalSizeForOptimalDisplay() const  {
   }
   assert(numberOfSubviews() == 2);
   KDSize textSize2 = m_textView2.minimalSizeForOptimalDisplay();
-  return KDSize(max(textSize1.width(), textSize2.width()) + k_horizontalMargin,
+  return KDSize(maxCoordinate(textSize1.width(), textSize2.width()) + k_horizontalMargin,
       textSize1.height() + textSize2.height() + 2*k_topAndBottomMargin + k_middleMargin);
 }
 
diff --git a/ion/src/device/usb/dfu_interface.cpp b/ion/src/device/usb/dfu_interface.cpp
index 029cce703..e4d9c013c 100644
--- a/ion/src/device/usb/dfu_interface.cpp
+++ b/ion/src/device/usb/dfu_interface.cpp
@@ -6,7 +6,7 @@ namespace Ion {
 namespace USB {
 namespace Device {
 
-static inline uint32_t min(uint32_t x, uint32_t y) { return (x<y ? x : y); }
+static inline uint32_t minUint32T(uint32_t x, uint32_t y) { return x < y ? x : y; }
 
 void DFUInterface::StatusData::push(Channel * c) const {
   c->push(m_bStatus);
@@ -136,7 +136,7 @@ bool DFUInterface::processUploadRequest(SetupPacket * request, uint8_t * transfe
     // Compute the reading address
     uint32_t readAddress = (request->wValue() - 2) * Endpoint0::MaxTransferSize + m_addressPointer;
     // Copy the requested memory zone into the transfer buffer.
-    uint16_t copySize = min(transferBufferMaxLength, request->wLength());
+    uint16_t copySize = minUint32T(transferBufferMaxLength, request->wLength());
     memcpy(transferBuffer, (void *)readAddress, copySize);
     *transferBufferLength = copySize;
   }
diff --git a/ion/src/device/usb/stack/device.cpp b/ion/src/device/usb/stack/device.cpp
index 27bf6d5de..0dcda47a5 100644
--- a/ion/src/device/usb/stack/device.cpp
+++ b/ion/src/device/usb/stack/device.cpp
@@ -5,7 +5,7 @@ namespace Ion {
 namespace USB {
 namespace Device {
 
-static inline uint16_t min(uint16_t x, uint16_t y) { return (x<y ? x : y); }
+static inline uint16_t minUint16T(uint16_t x, uint16_t y) { return x < y ? x : y; }
 
 void Device::poll() {
   // Read the interrupts
@@ -116,7 +116,7 @@ bool Device::processSetupInRequest(SetupPacket * request, uint8_t * transferBuff
 }
 
 bool Device::getStatus(uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength) {
-  *transferBufferLength = min(2, transferBufferMaxLength);
+  *transferBufferLength = minUint16T(2, transferBufferMaxLength);
   for (int i = 0; i<*transferBufferLength; i++) {
     transferBuffer[i] = 0; // No remote wakeup, not self-powered.
   }
diff --git a/ion/src/device/usb/stack/interface.cpp b/ion/src/device/usb/stack/interface.cpp
index 3fa95947e..35a54381a 100644
--- a/ion/src/device/usb/stack/interface.cpp
+++ b/ion/src/device/usb/stack/interface.cpp
@@ -4,7 +4,7 @@ namespace Ion {
 namespace USB {
 namespace Device {
 
-static inline uint16_t min(uint16_t x, uint16_t y) { return (x<y ? x : y); }
+static inline uint16_t minUint16T(uint16_t x, uint16_t y) { return x < y ? x : y; }
 
 bool Interface::processSetupInRequest(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength) {
   if (request->requestType() != SetupPacket::RequestType::Standard) {
@@ -26,7 +26,7 @@ bool Interface::processSetupInRequest(SetupPacket * request, uint8_t * transferB
 }
 
 bool Interface::getStatus(uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength) {
-  *transferBufferLength = min(2, transferBufferMaxLength);
+  *transferBufferLength = minUint16T(2, transferBufferMaxLength);
   for (int i = 0; i<*transferBufferLength; i++) {
     transferBuffer[i] = 0; // Reserved, must be set to 0
   }
@@ -34,7 +34,7 @@ bool Interface::getStatus(uint8_t * transferBuffer, uint16_t * transferBufferLen
 }
 
 bool Interface::getInterface(uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength) {
-  *transferBufferLength = min(1, transferBufferMaxLength);;
+  *transferBufferLength = minUint16T(1, transferBufferMaxLength);;
   if (*transferBufferLength > 0) {
     transferBuffer[0] = getActiveInterfaceAlternative();
   }
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 4bcce52b6..62b9e888b 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -5,7 +5,7 @@
 
 namespace UTF8Helper {
 
-static inline int min(int x, int y) { return x < y ? x : y; }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 const char * CodePointSearch(const char * s, CodePoint c) {
   UTF8Decoder decoder(s);
@@ -35,7 +35,7 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
   // Remove CodePoint c
   while (currentPointer < maxPointer && bufferIndex < dstSize) {
     if (codePoint != c) {
-      int copySize = min(nextPointer - currentPointer, dstSize - bufferIndex);
+      int copySize = minInt(nextPointer - currentPointer, dstSize - bufferIndex);
       memcpy(dst + bufferIndex, currentPointer, copySize);
       bufferIndex+= copySize;
     } else if (pointerToUpdate != nullptr && currentPointer < *pointerToUpdate) {
diff --git a/kandinsky/include/kandinsky/coordinate.h b/kandinsky/include/kandinsky/coordinate.h
index 4f450bd31..cb583a0f8 100644
--- a/kandinsky/include/kandinsky/coordinate.h
+++ b/kandinsky/include/kandinsky/coordinate.h
@@ -5,7 +5,4 @@
 
 typedef int16_t KDCoordinate;
 
-static inline KDCoordinate min(KDCoordinate x, KDCoordinate y) { return (x<y ? x : y); }
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return (x>y ? x : y); }
-
 #endif
diff --git a/kandinsky/src/rect.cpp b/kandinsky/src/rect.cpp
index 483821670..afad1fe48 100644
--- a/kandinsky/src/rect.cpp
+++ b/kandinsky/src/rect.cpp
@@ -1,5 +1,8 @@
 #include <kandinsky/rect.h>
 
+static inline KDCoordinate minCoordinate(KDCoordinate x, KDCoordinate y) { return x < y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 KDRect::KDRect(KDPoint p, KDSize s) :
   m_x(p.x()), m_y(p.y()),
   m_width(s.width()), m_height(s.height())
@@ -35,10 +38,10 @@ KDRect KDRect::intersectedWith(const KDRect & other) const {
     return KDRectZero;
   }
 
-  KDCoordinate intersectionLeft = max(left(), other.left());
-  KDCoordinate intersectionRight = min(right(), other.right());
-  KDCoordinate intersectionTop = max(top(), other.top());
-  KDCoordinate intersectionBottom = min(bottom(), other.bottom());
+  KDCoordinate intersectionLeft = maxCoordinate(left(), other.left());
+  KDCoordinate intersectionRight = minCoordinate(right(), other.right());
+  KDCoordinate intersectionTop = maxCoordinate(top(), other.top());
+  KDCoordinate intersectionBottom = minCoordinate(bottom(), other.bottom());
 
   return KDRect(
       intersectionLeft,
@@ -54,8 +57,8 @@ void computeUnionBound(KDCoordinate size1, KDCoordinate size2,
 {
   if (size1 != 0) {
     if (size2 != 0) {
-      *outputMin = min(min1, min2);
-      *outputMax = max(max1, max2);
+      *outputMin = minCoordinate(min1, min2);
+      *outputMax = maxCoordinate(max1, max2);
     } else {
       *outputMin = min1;
       *outputMax = max1;
diff --git a/poincare/src/binomial_coefficient_layout.cpp b/poincare/src/binomial_coefficient_layout.cpp
index 410861766..c04b5c675 100644
--- a/poincare/src/binomial_coefficient_layout.cpp
+++ b/poincare/src/binomial_coefficient_layout.cpp
@@ -7,7 +7,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 void BinomialCoefficientLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->position() == LayoutCursor::Position::Left
@@ -79,7 +79,7 @@ int BinomialCoefficientLayoutNode::serialize(char * buffer, int bufferSize, Pref
 
 KDSize BinomialCoefficientLayoutNode::computeSize() {
   KDSize coefficientsSize = KDSize(
-      max(nLayout()->layoutSize().width(), kLayout()->layoutSize().width()),
+      maxCoordinate(nLayout()->layoutSize().width(), kLayout()->layoutSize().width()),
       knHeight());
   KDCoordinate width = coefficientsSize.width() + 2*ParenthesisLayoutNode::ParenthesisWidth();
   return KDSize(width, coefficientsSize.height());
@@ -90,7 +90,7 @@ KDCoordinate BinomialCoefficientLayoutNode::computeBaseline() {
 }
 
 KDPoint BinomialCoefficientLayoutNode::positionOfChild(LayoutNode * child) {
-  KDCoordinate horizontalCenter = ParenthesisLayoutNode::ParenthesisWidth() + max(nLayout()->layoutSize().width(), kLayout()->layoutSize().width())/2;
+  KDCoordinate horizontalCenter = ParenthesisLayoutNode::ParenthesisWidth() + maxCoordinate(nLayout()->layoutSize().width(), kLayout()->layoutSize().width())/2;
   if (child == nLayout()) {
     return KDPoint(horizontalCenter - nLayout()->layoutSize().width()/2, 0);
   }
@@ -101,7 +101,7 @@ KDPoint BinomialCoefficientLayoutNode::positionOfChild(LayoutNode * child) {
 void BinomialCoefficientLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
   // Render the parentheses.
   KDCoordinate childHeight = knHeight();
-  KDCoordinate rightParenthesisPointX = max(nLayout()->layoutSize().width(), kLayout()->layoutSize().width()) + LeftParenthesisLayoutNode::ParenthesisWidth();
+  KDCoordinate rightParenthesisPointX = maxCoordinate(nLayout()->layoutSize().width(), kLayout()->layoutSize().width()) + LeftParenthesisLayoutNode::ParenthesisWidth();
   LeftParenthesisLayoutNode::RenderWithChildHeight(childHeight, ctx, p, expressionColor, backgroundColor);
   RightParenthesisLayoutNode::RenderWithChildHeight(childHeight, ctx, p.translatedBy(KDPoint(rightParenthesisPointX, 0)), expressionColor, backgroundColor);
 }
diff --git a/poincare/src/bracket_layout.cpp b/poincare/src/bracket_layout.cpp
index d9d140b45..a13f6d040 100644
--- a/poincare/src/bracket_layout.cpp
+++ b/poincare/src/bracket_layout.cpp
@@ -5,7 +5,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 void BracketLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   assert(cursor->layoutNode() == this);
@@ -84,7 +84,7 @@ KDCoordinate BracketLayoutNode::computeBaseline() {
     {
       currentNumberOfOpenBrackets++;
     }
-    result = max(result, sibling->baseline());
+    result = maxCoordinate(result, sibling->baseline());
   }
   return result + (layoutSize().height() - childHeight()) / 2;
 }
@@ -138,10 +138,10 @@ KDCoordinate BracketLayoutNode::computeChildHeight() {
     }
     KDCoordinate siblingHeight = sibling->layoutSize().height();
     KDCoordinate siblingBaseline = sibling->baseline();
-    maxUnderBaseline = max(maxUnderBaseline, siblingHeight - siblingBaseline);
-    maxAboveBaseline = max(maxAboveBaseline, siblingBaseline);
+    maxUnderBaseline = maxCoordinate(maxUnderBaseline, siblingHeight - siblingBaseline);
+    maxAboveBaseline = maxCoordinate(maxAboveBaseline, siblingBaseline);
   }
-  return max(result, maxUnderBaseline + maxAboveBaseline);
+  return maxCoordinate(result, maxUnderBaseline + maxAboveBaseline);
 }
 
 KDPoint BracketLayoutNode::positionOfChild(LayoutNode * child) {
diff --git a/poincare/src/condensed_sum_layout.cpp b/poincare/src/condensed_sum_layout.cpp
index c6c60bb14..096699e9d 100644
--- a/poincare/src/condensed_sum_layout.cpp
+++ b/poincare/src/condensed_sum_layout.cpp
@@ -4,18 +4,18 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 KDCoordinate CondensedSumLayoutNode::computeBaseline() {
-  return baseLayout()->baseline() + max(0, superscriptLayout()->layoutSize().height() - baseLayout()->layoutSize().height()/2);
+  return baseLayout()->baseline() + maxCoordinate(0, superscriptLayout()->layoutSize().height() - baseLayout()->layoutSize().height()/2);
 }
 
 KDSize CondensedSumLayoutNode::computeSize() {
   KDSize baseSize = baseLayout()->layoutSize();
   KDSize subscriptSize = subscriptLayout()->layoutSize();
   KDSize superscriptSize = superscriptLayout()->layoutSize();
-  KDCoordinate sizeWidth = baseSize.width() + max(subscriptSize.width(), superscriptSize.width());
-  KDCoordinate sizeHeight = max(baseSize.height()/2, subscriptSize.height()) + max(baseSize.height()/2, superscriptSize.height());
+  KDCoordinate sizeWidth = baseSize.width() + maxCoordinate(subscriptSize.width(), superscriptSize.width());
+  KDCoordinate sizeHeight = maxCoordinate(baseSize.height()/2, subscriptSize.height()) + maxCoordinate(baseSize.height()/2, superscriptSize.height());
   return KDSize(sizeWidth, sizeHeight);
 }
 
@@ -25,11 +25,11 @@ KDPoint CondensedSumLayoutNode::positionOfChild(LayoutNode * child) {
   KDSize baseSize = baseLayout()->layoutSize();
   KDSize superscriptSize = superscriptLayout()->layoutSize();
   if (child == baseLayout()) {
-    y = max(0, superscriptSize.height() - baseSize.height()/2);
+    y = maxCoordinate(0, superscriptSize.height() - baseSize.height()/2);
   }
   if (child == subscriptLayout()) {
     x = baseSize.width();
-    y = max(baseSize.height()/2, superscriptSize.height());
+    y = maxCoordinate(baseSize.height()/2, superscriptSize.height());
   }
   if (child == superscriptLayout()) {
     x = baseSize.width();
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index 535bdba68..ba192e739 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -13,6 +13,8 @@
 
 namespace Poincare {
 
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
+
 void removeZeroAtTheEnd(Integer * i) {
   if (i->isZero()) {
     return;
@@ -184,7 +186,7 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
   }
   /* Case 1: Decimal mode */
   int deltaCharMantissa = exponent < 0 ? -exponent+1 : 0;
-  strlcpy(buffer+currentChar+deltaCharMantissa, tempBuffer, max(0, bufferSize-deltaCharMantissa-currentChar));
+  strlcpy(buffer+currentChar+deltaCharMantissa, tempBuffer, maxInt(0, bufferSize-deltaCharMantissa-currentChar));
   if (exponent < 0) {
     for (int i = 0; i <= -exponent; i++) {
       if (currentChar >= bufferSize-1) { return bufferSize-1; }
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 2d34d4028..9128e9ccb 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -8,7 +8,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 void FractionLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
    if (cursor->position() == LayoutCursor::Position::Left
@@ -184,7 +184,7 @@ void FractionLayoutNode::didCollapseSiblings(LayoutCursor * cursor) {
 }
 
 KDSize FractionLayoutNode::computeSize() {
-  KDCoordinate width = max(numeratorLayout()->layoutSize().width(), denominatorLayout()->layoutSize().width())
+  KDCoordinate width = maxCoordinate(numeratorLayout()->layoutSize().width(), denominatorLayout()->layoutSize().width())
     + 2*Metric::FractionAndConjugateHorizontalOverflow+2*Metric::FractionAndConjugateHorizontalMargin;
   KDCoordinate height = numeratorLayout()->layoutSize().height()
     + k_fractionLineMargin + k_fractionLineHeight + k_fractionLineMargin
diff --git a/poincare/src/grid_layout.cpp b/poincare/src/grid_layout.cpp
index 0907208c7..218ea48c0 100644
--- a/poincare/src/grid_layout.cpp
+++ b/poincare/src/grid_layout.cpp
@@ -4,7 +4,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 // LayoutNode
 
@@ -220,7 +220,7 @@ KDPoint GridLayoutNode::positionOfChild(LayoutNode * l) {
 KDCoordinate GridLayoutNode::rowBaseline(int i) {
   KDCoordinate rowBaseline = 0;
   for (int j = 0; j < m_numberOfColumns; j++) {
-    rowBaseline = max(rowBaseline, childAtIndex(i*m_numberOfColumns+j)->baseline());
+    rowBaseline = maxCoordinate(rowBaseline, childAtIndex(i*m_numberOfColumns+j)->baseline());
   }
   return rowBaseline;
 }
@@ -230,7 +230,7 @@ KDCoordinate GridLayoutNode::rowHeight(int i) const {
   KDCoordinate baseline = const_cast<GridLayoutNode *>(this)->rowBaseline(i);
   for (int j = 0; j < m_numberOfColumns; j++) {
     LayoutNode * currentChild = const_cast<GridLayoutNode *>(this)->childAtIndex(i*m_numberOfColumns+j);
-    rowHeight = max(rowHeight, currentChild->layoutSize().height() - currentChild->baseline());
+    rowHeight = maxCoordinate(rowHeight, currentChild->layoutSize().height() - currentChild->baseline());
   }
   return baseline+rowHeight;
 }
@@ -240,14 +240,14 @@ KDCoordinate GridLayoutNode::height() const {
   for (int i = 0; i < m_numberOfRows; i++) {
     totalHeight += rowHeight(i);
   }
-  totalHeight += max((m_numberOfRows-1)*k_gridEntryMargin, 0);
+  totalHeight += maxCoordinate((m_numberOfRows-1)*k_gridEntryMargin, 0);
   return totalHeight;
 }
 
 KDCoordinate GridLayoutNode::columnWidth(int j) const {
   KDCoordinate columnWidth = 0;
   for (int i = 0; i < m_numberOfRows; i++) {
-    columnWidth = max(columnWidth, const_cast<GridLayoutNode *>(this)->childAtIndex(i*m_numberOfColumns+j)->layoutSize().width());
+    columnWidth = maxCoordinate(columnWidth, const_cast<GridLayoutNode *>(this)->childAtIndex(i*m_numberOfColumns+j)->layoutSize().width());
   }
   return columnWidth;
 }
@@ -257,7 +257,7 @@ KDCoordinate GridLayoutNode::width() const {
   for (int j = 0; j < m_numberOfColumns; j++) {
     totalWidth += columnWidth(j);
   }
-  totalWidth += max(0, (m_numberOfColumns-1)*k_gridEntryMargin);
+  totalWidth += maxCoordinate(0, (m_numberOfColumns-1)*k_gridEntryMargin);
   return totalWidth;
 }
 
diff --git a/poincare/src/integer.cpp b/poincare/src/integer.cpp
index 51ed772b6..da7320d06 100644
--- a/poincare/src/integer.cpp
+++ b/poincare/src/integer.cpp
@@ -13,7 +13,8 @@ extern "C" {
 #endif
 namespace Poincare {
 
-static inline int max(int x, int y) { return (x>y ? x : y); }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
 
 /* To compute operations between Integers, we need an array where to store the
  * result digits. Instead of allocating it on the stack which would eventually
@@ -375,7 +376,7 @@ Integer Integer::multiplication(const Integer & a, const Integer & b, bool oneDi
     return Integer::Overflow(a.m_negative != b.m_negative);
   }
 
-  uint8_t size = min(a.numberOfDigits() + b.numberOfDigits(), k_maxNumberOfDigits + oneDigitOverflow); // Enable overflowing of 1 digit
+  uint8_t size = minInt(a.numberOfDigits() + b.numberOfDigits(), k_maxNumberOfDigits + oneDigitOverflow); // Enable overflowing of 1 digit
 
   memset(s_workingBuffer, 0, size*sizeof(native_uint_t));
 
@@ -444,7 +445,7 @@ Integer Integer::usum(const Integer & a, const Integer & b, bool subtract, bool
     return Overflow(a.m_negative != b.m_negative);
   }
 
-  uint8_t size = max(a.numberOfDigits(), b.numberOfDigits());
+  uint8_t size = maxInt(a.numberOfDigits(), b.numberOfDigits());
   if (!subtract) {
     // Addition can overflow
     size++;
@@ -468,7 +469,7 @@ Integer Integer::usum(const Integer & a, const Integer & b, bool subtract, bool
       carry = (aDigit > result) || (bDigit > result); // There's been an overflow
     }
   }
-  size = min(size, k_maxNumberOfDigits+oneDigitOverflow);
+  size = minInt(size, k_maxNumberOfDigits+oneDigitOverflow);
   while (size>0 && s_workingBuffer[size-1] == 0) {
     size--;
   }
@@ -547,7 +548,7 @@ IntegerDivision Integer::udiv(const Integer & numerator, const Integer & denomin
   // qDigits is a half_native_uint_t array and enable one digit overflow
   half_native_uint_t * qDigits = reinterpret_cast<half_native_uint_t *>(s_workingBufferDivision);
   // The quotient q has at maximum m+1 half digits but we set an extra half digit to 0 to enable to easily convert it from half digits to digits
-  memset(qDigits, 0, max(m+1+1,2*k_maxNumberOfDigits)*sizeof(half_native_uint_t));
+  memset(qDigits, 0, maxInt(m+1+1,2*k_maxNumberOfDigits)*sizeof(half_native_uint_t));
   // betaMB = B*beta^m
   Integer betaMB = B.multiplyByPowerOfBase(m);
   if (Integer::NaturalOrder(A,betaMB) >= 0) { // A >= B*beta^m
@@ -558,7 +559,7 @@ IntegerDivision Integer::udiv(const Integer & numerator, const Integer & denomin
   for (int j = m-1; j >= 0; j--) {
     native_uint_t qj2 = ((native_uint_t)A.halfDigit(n+j)*base+(native_uint_t)A.halfDigit(n+j-1))/(native_uint_t)B.halfDigit(n-1); // (a[n+j]*beta+a[n+j-1])/b[n-1]
     half_native_uint_t baseMinus1 = (1 << 16) -1; // beta-1
-    qDigits[j] = qj2 < (native_uint_t)baseMinus1 ? (half_native_uint_t)qj2 : baseMinus1; // min(qj2, beta -1)
+    qDigits[j] = qj2 < (native_uint_t)baseMinus1 ? (half_native_uint_t)qj2 : baseMinus1; // minInt(qj2, beta -1)
     A = Integer::addition(A, multiplication(qDigits[j], B.multiplyByPowerOfBase(j), true), true, true); // A-q[j]*beta^j*B
     if (A.isNegative()) {
       Integer betaJM = B.multiplyByPowerOfBase(j); // betaJM = B*beta^j
diff --git a/poincare/src/integral_layout.cpp b/poincare/src/integral_layout.cpp
index 907ee5c01..9af734d8d 100644
--- a/poincare/src/integral_layout.cpp
+++ b/poincare/src/integral_layout.cpp
@@ -7,7 +7,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 const uint8_t topSymbolPixel[IntegralLayoutNode::k_symbolHeight][IntegralLayoutNode::k_symbolWidth] = {
   {0x00, 0x00, 0xFF, 0xFF},
@@ -190,14 +190,14 @@ KDSize IntegralLayoutNode::computeSize() {
   KDSize differentialSize = differentialLayout()->layoutSize();
   KDSize lowerBoundSize = lowerBoundLayout()->layoutSize();
   KDSize upperBoundSize = upperBoundLayout()->layoutSize();
-  KDCoordinate width = k_symbolWidth+k_lineThickness+k_boundWidthMargin+max(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin+integrandSize.width()+2*k_differentialWidthMargin+dSize.width()+differentialSize.width();
+  KDCoordinate width = k_symbolWidth+k_lineThickness+k_boundWidthMargin+maxCoordinate(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin+integrandSize.width()+2*k_differentialWidthMargin+dSize.width()+differentialSize.width();
   KDCoordinate baseline = computeBaseline();
-  KDCoordinate height = baseline + k_integrandHeigthMargin+max(integrandSize.height()-integrandLayout()->baseline(), differentialSize.height()-differentialLayout()->baseline())+lowerBoundSize.height();
+  KDCoordinate height = baseline + k_integrandHeigthMargin+maxCoordinate(integrandSize.height()-integrandLayout()->baseline(), differentialSize.height()-differentialLayout()->baseline())+lowerBoundSize.height();
   return KDSize(width, height);
 }
 
 KDCoordinate IntegralLayoutNode::computeBaseline() {
-  return upperBoundLayout()->layoutSize().height() + k_integrandHeigthMargin + max(integrandLayout()->baseline(), differentialLayout()->baseline());
+  return upperBoundLayout()->layoutSize().height() + k_integrandHeigthMargin + maxCoordinate(integrandLayout()->baseline(), differentialLayout()->baseline());
 }
 
 KDPoint IntegralLayoutNode::positionOfChild(LayoutNode * child) {
@@ -212,7 +212,7 @@ KDPoint IntegralLayoutNode::positionOfChild(LayoutNode * child) {
     x = k_symbolWidth+k_lineThickness+k_boundWidthMargin;;
     y = 0;
   } else if (child == integrandLayout()) {
-    x = k_symbolWidth +k_lineThickness+ k_boundWidthMargin+max(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin;
+    x = k_symbolWidth +k_lineThickness+ k_boundWidthMargin+maxCoordinate(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin;
     y = computeBaseline()-integrandLayout()->baseline();
   } else if (child == differentialLayout()) {
     x = computeSize().width() - k_differentialWidthMargin - differentialLayout()->layoutSize().width();
@@ -227,7 +227,7 @@ void IntegralLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionCo
   KDSize integrandSize = integrandLayout()->layoutSize();
   KDSize differentialSize = differentialLayout()->layoutSize();
   KDSize upperBoundSize = upperBoundLayout()->layoutSize();
-  KDCoordinate centralArgumentHeight =  max(integrandLayout()->baseline(), differentialLayout()->baseline()) + max(integrandSize.height()-integrandLayout()->baseline(), differentialSize.height()-differentialLayout()->baseline());
+  KDCoordinate centralArgumentHeight =  maxCoordinate(integrandLayout()->baseline(), differentialLayout()->baseline()) + maxCoordinate(integrandSize.height()-integrandLayout()->baseline(), differentialSize.height()-differentialLayout()->baseline());
 
   KDColor workingBuffer[k_symbolWidth*k_symbolHeight];
 
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index 70e7c73e3..da42ec1a4 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -16,6 +16,8 @@ namespace Poincare {
 
 /* Getters and setters */
 
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+
 KDCoordinate LayoutCursor::cursorHeight() {
   KDCoordinate height = layoutHeight();
   return height == 0 ? k_cursorHeight : height;
@@ -33,7 +35,7 @@ KDCoordinate LayoutCursor::baseline() {
   if (m_layout.hasChild(equivalentLayout)) {
     return equivalentLayout.baseline();
   } else if (m_layout.hasSibling(equivalentLayout)) {
-    return max(layoutBaseline, equivalentLayout.baseline());
+    return maxCoordinate(layoutBaseline, equivalentLayout.baseline());
   }
   return layoutBaseline;
 }
@@ -214,8 +216,8 @@ KDCoordinate LayoutCursor::layoutHeight() {
     KDCoordinate equivalentLayoutHeight = equivalentLayout.layoutSize().height();
     KDCoordinate pointedLayoutBaseline = m_layout.baseline();
     KDCoordinate equivalentLayoutBaseline = equivalentLayout.baseline();
-    return max(pointedLayoutBaseline, equivalentLayoutBaseline)
-      + max(pointedLayoutHeight - pointedLayoutBaseline, equivalentLayoutHeight - equivalentLayoutBaseline);
+    return maxCoordinate(pointedLayoutBaseline, equivalentLayoutBaseline)
+      + maxCoordinate(pointedLayoutHeight - pointedLayoutBaseline, equivalentLayoutHeight - equivalentLayoutBaseline);
   }
   return pointedLayoutHeight;
 }
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index 0172cdc52..875186161 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -7,7 +7,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 const uint8_t radixPixel[NthRootLayoutNode::k_leftRadixHeight][NthRootLayoutNode::k_leftRadixWidth] = {
   {0x00, 0xFF, 0xFF, 0xFF, 0xFF},
@@ -198,7 +198,7 @@ KDSize NthRootLayoutNode::computeSize() {
 
 KDCoordinate NthRootLayoutNode::computeBaseline() {
   if (indexLayout() != nullptr) {
-    return max(
+    return maxCoordinate(
         radicandLayout()->baseline() + k_radixLineThickness + k_heightMargin,
         indexLayout()->layoutSize().height() + k_indexHeight);
   } else {
@@ -225,7 +225,7 @@ KDPoint NthRootLayoutNode::positionOfChild(LayoutNode * child) {
 KDSize NthRootLayoutNode::adjustedIndexSize() {
   return indexLayout() == nullptr ?
     KDSize(k_leftRadixWidth, 0) :
-    KDSize(max(k_leftRadixWidth, indexLayout()->layoutSize().width()), indexLayout()->layoutSize().height());
+    KDSize(maxCoordinate(k_leftRadixWidth, indexLayout()->layoutSize().width()), indexLayout()->layoutSize().height());
 }
 
 void NthRootLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
diff --git a/poincare/src/product_layout.cpp b/poincare/src/product_layout.cpp
index 70abbfb8f..210ea88b6 100644
--- a/poincare/src/product_layout.cpp
+++ b/poincare/src/product_layout.cpp
@@ -4,7 +4,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 int ProductLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   return SequenceLayoutNode::writeDerivedClassInBuffer("product", buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits);
@@ -16,14 +16,14 @@ void ProductLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionCol
   KDSize lowerBoundNEqualsSize = lowerBoundSizeWithVariableEquals();
 
   // Render the Product symbol.
-  ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
-    p.y() + max(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
+  ctx->fillRect(KDRect(p.x() + maxCoordinate(maxCoordinate(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
+    p.y() + maxCoordinate(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
     k_lineThickness, k_symbolHeight), expressionColor);
-  ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
-    p.y() + max(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
+  ctx->fillRect(KDRect(p.x() + maxCoordinate(maxCoordinate(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
+    p.y() + maxCoordinate(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
     k_symbolWidth, k_lineThickness), expressionColor);
-  ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2)+k_symbolWidth,
-    p.y() + max(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
+  ctx->fillRect(KDRect(p.x() + maxCoordinate(maxCoordinate(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2)+k_symbolWidth,
+    p.y() + maxCoordinate(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
     k_lineThickness, k_symbolHeight), expressionColor);
 
   // Render the "n=" and the parentheses.
diff --git a/poincare/src/sequence_layout.cpp b/poincare/src/sequence_layout.cpp
index ed209b147..7e98ecfa9 100644
--- a/poincare/src/sequence_layout.cpp
+++ b/poincare/src/sequence_layout.cpp
@@ -7,7 +7,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 constexpr char SequenceLayoutNode::k_equal[];
 
@@ -159,7 +159,7 @@ KDSize SequenceLayoutNode::lowerBoundSizeWithVariableEquals() {
   KDSize equalSize = k_font->stringSize(k_equal);
   return KDSize(
       variableSize.width() + equalSize.width() + lowerBoundSize.width(),
-      subscriptBaseline() + max(max(variableSize.height() - variableLayout()->baseline(), lowerBoundSize.height() - lowerBoundLayout()->baseline()), equalSize.height()/2));
+      subscriptBaseline() + maxCoordinate(maxCoordinate(variableSize.height() - variableLayout()->baseline(), lowerBoundSize.height() - lowerBoundLayout()->baseline()), equalSize.height()/2));
 }
 
 KDSize SequenceLayoutNode::computeSize() {
@@ -170,13 +170,13 @@ KDSize SequenceLayoutNode::computeSize() {
     argumentSize.width() + 2*ParenthesisLayoutNode::ParenthesisWidth(),
     ParenthesisLayoutNode::HeightGivenChildHeight(argumentSize.height()));
   KDSize result = KDSize(
-    max(max(k_symbolWidth, totalLowerBoundSize.width()), upperBoundSize.width())+k_argumentWidthMargin+argumentSizeWithParentheses.width(),
-    baseline() + max(k_symbolHeight/2+k_boundHeightMargin+totalLowerBoundSize.height(), argumentSizeWithParentheses.height() - argumentLayout()->baseline()));
+    maxCoordinate(maxCoordinate(k_symbolWidth, totalLowerBoundSize.width()), upperBoundSize.width())+k_argumentWidthMargin+argumentSizeWithParentheses.width(),
+    baseline() + maxCoordinate(k_symbolHeight/2+k_boundHeightMargin+totalLowerBoundSize.height(), argumentSizeWithParentheses.height() - argumentLayout()->baseline()));
   return result;
 }
 
 KDCoordinate SequenceLayoutNode::computeBaseline() {
-  return max(upperBoundLayout()->layoutSize().height()+k_boundHeightMargin+(k_symbolHeight+1)/2, argumentLayout()->baseline());
+  return maxCoordinate(upperBoundLayout()->layoutSize().height()+k_boundHeightMargin+(k_symbolHeight+1)/2, argumentLayout()->baseline());
 }
 
 KDPoint SequenceLayoutNode::positionOfChild(LayoutNode * l) {
@@ -192,10 +192,10 @@ KDPoint SequenceLayoutNode::positionOfChild(LayoutNode * l) {
     x = completeLowerBoundX() + equalSize.width() + variableSize.width();
     y = baseline() + k_symbolHeight/2 + k_boundHeightMargin + subscriptBaseline() - lowerBoundLayout()->baseline();
   } else if (l == upperBoundLayout()) {
-    x = max(max(0, (k_symbolWidth-upperBoundSize.width())/2), (lowerBoundSizeWithVariableEquals().width()-upperBoundSize.width())/2);
+    x = maxCoordinate(maxCoordinate(0, (k_symbolWidth-upperBoundSize.width())/2), (lowerBoundSizeWithVariableEquals().width()-upperBoundSize.width())/2);
     y = baseline() - (k_symbolHeight+1)/2- k_boundHeightMargin-upperBoundSize.height();
   } else if (l == argumentLayout()) {
-    x = max(max(k_symbolWidth, lowerBoundSizeWithVariableEquals().width()), upperBoundSize.width())+k_argumentWidthMargin+ParenthesisLayoutNode::ParenthesisWidth();
+    x = maxCoordinate(maxCoordinate(k_symbolWidth, lowerBoundSizeWithVariableEquals().width()), upperBoundSize.width())+k_argumentWidthMargin+ParenthesisLayoutNode::ParenthesisWidth();
     y = baseline() - argumentLayout()->baseline();
   } else {
     assert(false);
@@ -258,12 +258,12 @@ void SequenceLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionCo
 
 KDCoordinate SequenceLayoutNode::completeLowerBoundX() {
   KDSize upperBoundSize = upperBoundLayout()->layoutSize();
- return max(max(0, (k_symbolWidth-lowerBoundSizeWithVariableEquals().width())/2),
+ return maxCoordinate(maxCoordinate(0, (k_symbolWidth-lowerBoundSizeWithVariableEquals().width())/2),
           (upperBoundSize.width()-lowerBoundSizeWithVariableEquals().width())/2);
 }
 
 KDCoordinate SequenceLayoutNode::subscriptBaseline() {
-  return max(max(variableLayout()->baseline(), lowerBoundLayout()->baseline()), k_font->stringSize(k_equal).height()/2);
+  return maxCoordinate(maxCoordinate(variableLayout()->baseline(), lowerBoundLayout()->baseline()), k_font->stringSize(k_equal).height()/2);
 }
 
 }
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 30c1e5175..0851bd782 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -5,7 +5,7 @@
 
 namespace Poincare {
 
-static inline int min(int x, int y) { return x < y ? x : y; }
+static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 static bool checkBufferSize(char * buffer, int bufferSize, int * result) {
   // If buffer has size 0 or 1, put a zero if it fits and return
@@ -191,7 +191,7 @@ int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoin
     }
   }
   size_t size = UTF8Decoder::CodePointToChars(c, buffer, bufferSize);
-  int nullTerminatingIndex = min(size, bufferSize - 1);
+  int nullTerminatingIndex = minInt(size, bufferSize - 1);
   buffer[nullTerminatingIndex] = 0;
   return nullTerminatingIndex;
 }
diff --git a/poincare/src/sum_layout.cpp b/poincare/src/sum_layout.cpp
index 1d7a60d74..b6ddec112 100644
--- a/poincare/src/sum_layout.cpp
+++ b/poincare/src/sum_layout.cpp
@@ -4,7 +4,7 @@
 
 namespace Poincare {
 
-static inline KDCoordinate max(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
+static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
 const uint8_t symbolPixel[SumLayoutNode::k_symbolHeight][SumLayoutNode::k_symbolWidth] = {
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
@@ -36,8 +36,8 @@ void SumLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor,
 
   // Render the Sum symbol.
   KDColor workingBuffer[k_symbolWidth*k_symbolHeight];
-  KDRect symbolFrame(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
-      p.y() + max(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
+  KDRect symbolFrame(p.x() + maxCoordinate(maxCoordinate(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundNEqualsSize.width()-k_symbolWidth)/2),
+      p.y() + maxCoordinate(upperBoundSize.height()+k_boundHeightMargin, argumentLayout()->baseline()-(k_symbolHeight+1)/2),
       k_symbolWidth, k_symbolHeight);
   ctx->blendRectWithMask(symbolFrame, expressionColor, (const uint8_t *)symbolPixel, (KDColor *)workingBuffer);
 
diff --git a/poincare/src/undefined.cpp b/poincare/src/undefined.cpp
index 7031aec61..c45bd2663 100644
--- a/poincare/src/undefined.cpp
+++ b/poincare/src/undefined.cpp
@@ -9,6 +9,8 @@ extern "C" {
 
 namespace Poincare {
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 int UndefinedNode::polynomialDegree(Context & context, const char * symbolName) const {
   return -1;
 }
@@ -27,7 +29,7 @@ int UndefinedNode::serialize(char * buffer, int bufferSize, Preferences::PrintFl
     return -1;
   }
   strlcpy(buffer, Undefined::Name(), bufferSize);
-  return min(Undefined::NameSize(), bufferSize) - 1;
+  return minInt(Undefined::NameSize(), bufferSize) - 1;
 }
 
 template<typename T> Evaluation<T> UndefinedNode::templatedApproximate() const {
diff --git a/poincare/src/unreal.cpp b/poincare/src/unreal.cpp
index e60d16bd4..9d6c1e0df 100644
--- a/poincare/src/unreal.cpp
+++ b/poincare/src/unreal.cpp
@@ -8,6 +8,8 @@ extern "C" {
 
 namespace Poincare {
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 Layout UnrealNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   return LayoutHelper::String(Unreal::Name(), Unreal::NameSize()-1);
 }
@@ -17,7 +19,7 @@ int UnrealNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
     return -1;
   }
   strlcpy(buffer, Unreal::Name(), bufferSize);
-  return min(Unreal::NameSize(), bufferSize) - 1;
+  return minInt(Unreal::NameSize(), bufferSize) - 1;
 }
 
 }

From 6765de4598603b5db3c338462cac406752a6e704 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 15:56:04 +0100
Subject: [PATCH 046/295] [apps/regression] Add X bar and Y bar

---
 apps/regression/graph_controller.cpp | 8 ++++----
 kandinsky/fonts/code_points.h        | 3 ---
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 1071bde56..2c0213b1f 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -121,8 +121,8 @@ void GraphController::reloadBannerView() {
   double x = m_cursor->x();
   // Display a specific legend if the mean dot is selected
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    constexpr static char legX[] = {'X'/*TODO LEA Ion::Charset::XBar*/, '=', 0};
-    legend = legX;
+    // \xCC\x84 represents the combining bar ' ̄'
+    legend = "x\xCC\x84=";
     x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   }
   numberOfChar += strlcpy(buffer, legend, bufferSize);
@@ -138,8 +138,8 @@ void GraphController::reloadBannerView() {
   legend = "y=";
   double y = m_cursor->y();
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    constexpr static char legY[] = {'Y' /*TODO LEA Ion::Charset::YBar*/, '=', 0};
-    legend = legY;
+    // \xCC\x84 represents the combining bar ' ̄'
+    legend = "y\xCC\x84=";
     y = m_store->meanOfColumn(*m_selectedSeriesIndex, 1);
   }
   numberOfChar += strlcpy(buffer, legend, bufferSize);
diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index f4edaedfc..42da24c24 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -145,9 +145,6 @@ uint32_t CodePoints[] = {
   0x1d422, // 𝐢 // MATHEMATICAL BOLD SMALL I"
 
   // Apostrophe
-  // Xbar
-  // Ybar
-
 };
 
 int NumberOfCodePoints = sizeof(CodePoints)/sizeof(CodePoints[0]);

From bd2ea41fbed1cb46d66649107b8e6c33a2372495 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 16:11:35 +0100
Subject: [PATCH 047/295] [apps/escher] Rename cursorTextLocation as
 cursorLocation

---
 apps/code/editor_controller.cpp               |  6 +-
 apps/code/editor_view.h                       |  4 +-
 apps/code/menu_controller.cpp                 | 12 ++--
 apps/probability/calculation_controller.cpp   |  4 +-
 .../editable_cell_table_view_controller.cpp   |  4 +-
 apps/shared/text_field_with_extension.cpp     |  6 +-
 apps/shared/text_field_with_extension.h       |  2 +-
 escher/include/escher/text_area.h             |  2 +-
 escher/include/escher/text_input.h            | 14 ++--
 escher/src/text_area.cpp                      | 56 ++++++++--------
 escher/src/text_field.cpp                     | 66 +++++++++----------
 escher/src/text_input.cpp                     | 12 ++--
 12 files changed, 94 insertions(+), 94 deletions(-)

diff --git a/apps/code/editor_controller.cpp b/apps/code/editor_controller.cpp
index 9769f0e23..6bf45eca7 100644
--- a/apps/code/editor_controller.cpp
+++ b/apps/code/editor_controller.cpp
@@ -44,7 +44,7 @@ void EditorController::didBecomeFirstResponder() {
 
 void EditorController::viewWillAppear() {
   m_editorView.loadSyntaxHighlighter();
-  m_editorView.setCursorTextLocation(m_editorView.text() + strlen(m_editorView.text()));
+  m_editorView.setCursorLocation(m_editorView.text() + strlen(m_editorView.text()));
 }
 
 void EditorController::viewDidDisappear() {
@@ -70,7 +70,7 @@ bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events:
     /* If the cursor is on the left of the text of a line, backspace one
      * indentation space at a time. */
     char * text = const_cast<char *>(textArea->text());
-    const char * charBeforeCursorPointer = textArea->cursorTextLocation()-1;
+    const char * charBeforeCursorPointer = textArea->cursorLocation()-1;
     int indentationSize = 0;
     while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
       charBeforeCursorPointer--;
@@ -89,7 +89,7 @@ bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events:
     /* If the cursor is on the left of the text of a line, a space triggers an
      * indentation. */
     char * text = const_cast<char *>(textArea->text());
-    const char * charBeforeCursorPointer = textArea->cursorTextLocation()-1;
+    const char * charBeforeCursorPointer = textArea->cursorLocation()-1;
     while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
       charBeforeCursorPointer--;
     }
diff --git a/apps/code/editor_view.h b/apps/code/editor_view.h
index 170fc9b54..7e4d85ece 100644
--- a/apps/code/editor_view.h
+++ b/apps/code/editor_view.h
@@ -16,8 +16,8 @@ public:
   void setText(char * textBuffer, size_t textBufferSize) {
     m_textArea.setText(textBuffer, textBufferSize);
   }
-  bool setCursorTextLocation(const char * location) {
-    return m_textArea.setCursorTextLocation(location);
+  bool setCursorLocation(const char * location) {
+    return m_textArea.setCursorLocation(location);
   }
   void loadSyntaxHighlighter() { m_textArea.loadSyntaxHighlighter(); };
   void unloadSyntaxHighlighter() { m_textArea.unloadSyntaxHighlighter(); };
diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index 363cdce52..658874d2f 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -126,7 +126,7 @@ void MenuController::renameSelectedScript() {
   app()->setFirstResponder(myCell);
   myCell->setHighlighted(false);
   myCell->textField()->setEditing(true, false);
-  myCell->textField()->setCursorTextLocation(myCell->textField()->text() + strlen(myCell->textField()->text()));
+  myCell->textField()->setCursorLocation(myCell->textField()->text() + strlen(myCell->textField()->text()));
 }
 
 void MenuController::deleteScript(Script script) {
@@ -285,7 +285,7 @@ bool MenuController::textFieldShouldFinishEditing(TextField * textField, Ion::Ev
 bool MenuController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
   if (event == Ion::Events::Right
       && textField->isEditing()
-      && textField->cursorTextLocation() == textField->text() + textField->draftTextLength()) {
+      && textField->cursorLocation() == textField->text() + textField->draftTextLength()) {
     return true;
   }
   if (event == Ion::Events::Clear && textField->isEditing()) {
@@ -294,7 +294,7 @@ bool MenuController::textFieldDidReceiveEvent(TextField * textField, Ion::Events
     assert(k_bufferSize >= 1 + strlen(ScriptStore::k_scriptExtension) + 1);
     strlcpy(&buffer[1], ScriptStore::k_scriptExtension, strlen(ScriptStore::k_scriptExtension) + 1);
     textField->setText(buffer);
-    textField->setCursorTextLocation(textField->text());
+    textField->setCursorLocation(textField->text());
     return true;
   }
   return false;
@@ -318,7 +318,7 @@ bool MenuController::textFieldDidFinishEditing(TextField * textField, const char
      * default name and let the user modify it. */
     if (!foundDefaultName) {
       textField->setText(numberedDefaultName);
-      textField->setCursorTextLocation(textField->draftTextBuffer() + defaultNameLength);
+      textField->setCursorLocation(textField->draftTextBuffer() + defaultNameLength);
     }
     newName = const_cast<const char *>(numberedDefaultName);
   }
@@ -351,8 +351,8 @@ bool MenuController::textFieldDidFinishEditing(TextField * textField, const char
 bool MenuController::textFieldDidHandleEvent(TextField * textField, bool returnValue, bool textSizeDidChange) {
   int scriptExtensionLength = 1 + strlen(ScriptStore::k_scriptExtension);
   const char * maxPointerLocation = textField->text() + textField->draftTextLength() - scriptExtensionLength;
-  if (textField->isEditing() && textField->cursorTextLocation() > maxPointerLocation) {
-    textField->setCursorTextLocation(maxPointerLocation);
+  if (textField->isEditing() && textField->cursorLocation() > maxPointerLocation) {
+    textField->setCursorLocation(maxPointerLocation);
   }
   return returnValue;
 }
diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 90c509640..e517ef379 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -203,10 +203,10 @@ bool CalculationController::textFieldDidHandleEvent(::TextField * textField, boo
 bool CalculationController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
   return TextFieldDelegate::textFieldShouldFinishEditing(textField, event)
        || (event == Ion::Events::Right
-           && textField->cursorTextLocation() == textField->text() + textField->draftTextLength()
+           && textField->cursorLocation() == textField->text() + textField->draftTextLength()
            && selectedColumn() < m_calculation->numberOfParameters())
        || (event == Ion::Events::Left
-           && textField->cursorTextLocation() == textField->text());
+           && textField->cursorLocation() == textField->text());
 }
 
 bool CalculationController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index a6c411bd8..ba635fc6e 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -19,8 +19,8 @@ bool EditableCellTableViewController::textFieldShouldFinishEditing(TextField * t
   return TextFieldDelegate::textFieldShouldFinishEditing(textField, event)
      || (event == Ion::Events::Down && selectedRow() < numberOfRows()-1)
      || (event == Ion::Events::Up && selectedRow() > 0)
-     || (event == Ion::Events::Right && (textField->cursorTextLocation() == textField->draftTextBuffer() + textField->draftTextLength()) && selectedColumn() < numberOfColumns()-1)
-     || (event == Ion::Events::Left && textField->cursorTextLocation() == textField->draftTextBuffer() && selectedColumn() > 0);
+     || (event == Ion::Events::Right && (textField->cursorLocation() == textField->draftTextBuffer() + textField->draftTextLength()) && selectedColumn() < numberOfColumns()-1)
+     || (event == Ion::Events::Left && textField->cursorLocation() == textField->draftTextBuffer() && selectedColumn() > 0);
 }
 
 bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
diff --git a/apps/shared/text_field_with_extension.cpp b/apps/shared/text_field_with_extension.cpp
index 5d74cb531..ac31f247b 100644
--- a/apps/shared/text_field_with_extension.cpp
+++ b/apps/shared/text_field_with_extension.cpp
@@ -2,7 +2,7 @@
 
 namespace Shared {
 
-void TextFieldWithExtension::willSetCursorTextLocation(const char * * location) {
+void TextFieldWithExtension::willSetCursorLocation(const char * * location) {
   size_t textLength = strlen(text());
   assert(textLength >= m_extensionLength);
   const char * maxLocation = m_contentView.draftTextBuffer() + (textLength - m_extensionLength);
@@ -24,7 +24,7 @@ bool TextFieldWithExtension::removeTextBeforeExtension(bool whole) {
   assert(isEditing());
   const char * extension = m_contentView.draftTextBuffer() + (strlen(text()) - m_extensionLength);
   assert(extension >= m_contentView.draftTextBuffer() && extension < m_contentView.draftTextBuffer() + (ContentView::k_maxBufferSize - m_extensionLength));
-  char * destination = whole ? m_contentView.draftTextBuffer() : const_cast<char *>(cursorTextLocation());
+  char * destination = whole ? m_contentView.draftTextBuffer() : const_cast<char *>(cursorLocation());
   if (destination == extension) {
     return false;
   }
@@ -32,7 +32,7 @@ bool TextFieldWithExtension::removeTextBeforeExtension(bool whole) {
   assert(destination < extension);
   m_contentView.willModifyTextBuffer();
   strlcpy(destination, extension, ContentView::k_maxBufferSize - (destination - m_contentView.draftTextBuffer()));
-  m_contentView.setCursorTextLocation(destination);
+  m_contentView.setCursorLocation(destination);
   m_contentView.didModifyTextBuffer();
   layoutSubviews();
   return true;
diff --git a/apps/shared/text_field_with_extension.h b/apps/shared/text_field_with_extension.h
index fa2264be4..f4191b3f0 100644
--- a/apps/shared/text_field_with_extension.h
+++ b/apps/shared/text_field_with_extension.h
@@ -24,7 +24,7 @@ public:
     m_extensionLength(extensionLength)
   {}
 private:
-  void willSetCursorTextLocation(const char * * location) override;
+  void willSetCursorLocation(const char * * location) override;
   bool privateRemoveEndOfLine() override;
   void removeWholeText() override;
   bool removeTextBeforeExtension(bool whole);
diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index b974ae9f9..0f9fa8b77 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -98,7 +98,7 @@ protected:
       TextInput::ContentView(font),
       m_text(nullptr, 0)
     {
-      m_cursorTextLocation = m_text.text();
+      m_cursorLocation = m_text.text();
     }
     void drawRect(KDContext * ctx, KDRect rect) const override;
     void drawStringAt(KDContext * ctx, int line, int column, const char * text, size_t length, KDColor textColor, KDColor backgroundColor) const;
diff --git a/escher/include/escher/text_input.h b/escher/include/escher/text_input.h
index 4406fba4d..24a8cdeb5 100644
--- a/escher/include/escher/text_input.h
+++ b/escher/include/escher/text_input.h
@@ -12,8 +12,8 @@ public:
   void setFont(const KDFont * font) { contentView()->setFont(font); }
   const char * text() const { return nonEditableContentView()->text(); }
   bool removeCodePoint();
-  const char * cursorTextLocation() const { return nonEditableContentView()->cursorTextLocation(); }
-  bool setCursorTextLocation(const char * location);
+  const char * cursorLocation() const { return nonEditableContentView()->cursorLocation(); }
+  bool setCursorLocation(const char * location);
   virtual void scrollToCursor();
 protected:
   class ContentView : public View {
@@ -22,12 +22,12 @@ protected:
       View(),
       m_cursorView(),
       m_font(font),
-      m_cursorTextLocation(nullptr)
+      m_cursorLocation(nullptr)
     {}
     void setFont(const KDFont * font);
     const KDFont * font() const { return m_font; }
-    const char * cursorTextLocation() const { assert(m_cursorTextLocation != nullptr); return m_cursorTextLocation; }
-    void setCursorTextLocation(const char * cursorTextLocation);
+    const char * cursorLocation() const { assert(m_cursorLocation != nullptr); return m_cursorLocation; }
+    void setCursorLocation(const char * cursorLocation);
     virtual const char * text() const = 0;
     virtual bool insertTextAtLocation(const char * text, const char * location) = 0;
     virtual bool removeCodePoint() = 0;
@@ -39,7 +39,7 @@ protected:
     virtual KDRect glyphFrameAtPosition(const char * position) const = 0;
     TextCursorView m_cursorView;
     const KDFont * m_font;
-    const char * m_cursorTextLocation;
+    const char * m_cursorLocation;
     virtual KDRect dirtyRectFromPosition(const char * position, bool lineBreak) const;
   private:
     int numberOfSubviews() const override { return 1; }
@@ -61,7 +61,7 @@ protected:
   }
   virtual const ContentView * nonEditableContentView() const = 0;
 private:
-  virtual void willSetCursorTextLocation(const char * * location) {}
+  virtual void willSetCursorLocation(const char * * location) {}
   virtual bool privateRemoveEndOfLine();
 };
 
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 57f000dfb..d08d62535 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -21,7 +21,7 @@ TextArea::TextArea(Responder * parentResponder, View * contentView, const KDFont
 }
 
 bool TextArea::handleEventWithText(const char * text, bool indentation, bool forceCursorRightOfText) {
-  const char * nextCursorLocation = cursorTextLocation();
+  const char * nextCursorLocation = cursorLocation();
 
   const char * cursorPositionInCommand = TextInputHelpers::CursorPositionInCommand(text);
 
@@ -32,7 +32,7 @@ bool TextArea::handleEventWithText(const char * text, bool indentation, bool for
   UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, UCodePointEmpty, &cursorPositionInCommand);
 
   // Insert the text
-  if ((indentation && insertTextWithIndentation(buffer, cursorTextLocation())) || insertTextAtLocation(buffer, cursorTextLocation())) {
+  if ((indentation && insertTextWithIndentation(buffer, cursorLocation())) || insertTextAtLocation(buffer, cursorLocation())) {
     // Set the cursor location
     if (forceCursorRightOfText) {
       nextCursorLocation += strlen(buffer);
@@ -40,7 +40,7 @@ bool TextArea::handleEventWithText(const char * text, bool indentation, bool for
       nextCursorLocation += cursorPositionInCommand - text;
     }
   }
-  setCursorTextLocation(nextCursorLocation);
+  setCursorLocation(nextCursorLocation);
   return true;
 }
 
@@ -50,20 +50,20 @@ bool TextArea::handleEvent(Ion::Events::Event event) {
   } else if (handleBoxEvent(app(), event)) {
     return true;
   } else if (event == Ion::Events::Left) {
-    if (cursorTextLocation() <= text()) {
-      assert(cursorTextLocation() == text());
+    if (cursorLocation() <= text()) {
+      assert(cursorLocation() == text());
       return false;
     }
-    UTF8Decoder decoder(text(), cursorTextLocation());
+    UTF8Decoder decoder(text(), cursorLocation());
     decoder.previousCodePoint();
-    return setCursorTextLocation(decoder.stringPosition());
+    return setCursorLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Right) {
-    if (*cursorTextLocation() == 0) {
+    if (*cursorLocation() == 0) {
       return false;
     }
-    UTF8Decoder decoder(text(), cursorTextLocation());
+    UTF8Decoder decoder(text(), cursorLocation());
     decoder.nextCodePoint();
-    return setCursorTextLocation(decoder.stringPosition());
+    return setCursorLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Up) {
     contentView()->moveCursorGeo(0, -1);
   } else if (event == Ion::Events::Down) {
@@ -98,7 +98,7 @@ void TextArea::setText(char * textBuffer, size_t textBufferSize) {
 
 bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * location) {
   int indentation = indentationBeforeCursor();
-  const char * previousChar = cursorTextLocation()-1;
+  const char * previousChar = cursorLocation()-1;
   if (previousChar >= const_cast<TextArea *>(this)->contentView()->text() && *previousChar == ':') {
     indentation += k_indentationSpaces;
   }
@@ -127,7 +127,7 @@ bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * l
 }
 
 int TextArea::indentationBeforeCursor() const {
-  const char * p = cursorTextLocation()-1;
+  const char * p = cursorLocation()-1;
   int indentationSize = 0;
   // No need to use the UTF8Decoder here, be cause we look for an ASCII char.
   while (p >= const_cast<TextArea *>(this)->contentView()->text() && *p != '\n') {
@@ -366,7 +366,7 @@ KDSize TextArea::ContentView::minimalSizeForOptimalDisplay() const {
 
 void TextArea::TextArea::ContentView::setText(char * textBuffer, size_t textBufferSize) {
   m_text.setText(textBuffer, textBufferSize);
-  m_cursorTextLocation = text();
+  m_cursorLocation = text();
 }
 
 bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, const char * location) {
@@ -389,39 +389,39 @@ bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, co
 }
 
 bool TextArea::TextArea::ContentView::removeCodePoint() {
-  if (cursorTextLocation() <= text()) {
-    assert(cursorTextLocation() == text());
+  if (cursorLocation() <= text()) {
+    assert(cursorLocation() == text());
     return false;
   }
   bool lineBreak = false;
-  const char * cursorLoc = cursorTextLocation();
+  const char * cursorLoc = cursorLocation();
   lineBreak = m_text.removeCodePoint(&cursorLoc) == '\n';
-  setCursorTextLocation(cursorLoc); // Update the cursor
+  setCursorLocation(cursorLoc); // Update the cursor
   layoutSubviews(); // Reposition the cursor
-  reloadRectFromPosition(cursorTextLocation(), lineBreak);
+  reloadRectFromPosition(cursorLocation(), lineBreak);
   return true;
 }
 
 bool TextArea::ContentView::removeEndOfLine() {
-  size_t removedLine = m_text.removeRemainingLine(cursorTextLocation(), 1);
+  size_t removedLine = m_text.removeRemainingLine(cursorLocation(), 1);
   if (removedLine > 0) {
     layoutSubviews();
-    reloadRectFromPosition(cursorTextLocation(), false);
+    reloadRectFromPosition(cursorLocation(), false);
     return true;
   }
   return false;
 }
 
 bool TextArea::ContentView::removeStartOfLine() {
-  if (cursorTextLocation() <= text()) {
-    assert(cursorTextLocation() == text());
+  if (cursorLocation() <= text()) {
+    assert(cursorLocation() == text());
     return false;
   }
-  size_t removedLine = m_text.removeRemainingLine(cursorTextLocation(), -1); //TODO LEA Before : cursorTextLocation()-1
+  size_t removedLine = m_text.removeRemainingLine(cursorLocation(), -1); //TODO LEA Before : cursorLocation()-1
   if (removedLine > 0) {
-    assert(cursorTextLocation() >= text() + removedLine);
-    setCursorTextLocation(cursorTextLocation() - removedLine);
-    reloadRectFromPosition(cursorTextLocation(), false);
+    assert(cursorLocation() >= text() + removedLine);
+    setCursorLocation(cursorLocation() - removedLine);
+    reloadRectFromPosition(cursorLocation(), false);
     return true;
   }
   return false;
@@ -453,6 +453,6 @@ KDRect TextArea::ContentView::glyphFrameAtPosition(const char * position) const
 }
 
 void TextArea::ContentView::moveCursorGeo(int deltaX, int deltaY) {
-  Text::Position p = m_text.positionAtPointer(cursorTextLocation());
-  setCursorTextLocation(m_text.pointerAtPosition(Text::Position(p.column() + deltaX, p.line() + deltaY)));
+  Text::Position p = m_text.positionAtPointer(cursorLocation());
+  setCursorLocation(m_text.pointerAtPosition(Text::Position(p.column() + deltaX, p.line() + deltaY)));
 }
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 86f83a6ca..6482a6dd5 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -22,7 +22,7 @@ TextField::ContentView::ContentView(char * textBuffer, char * draftTextBuffer, s
   m_backgroundColor(backgroundColor)
 {
   assert(m_textBufferSize <= k_maxBufferSize);
-  m_cursorTextLocation = draftTextBuffer;
+  m_cursorLocation = draftTextBuffer;
 }
 
 void TextField::ContentView::setBackgroundColor(KDColor backgroundColor) {
@@ -80,17 +80,17 @@ void TextField::ContentView::setEditing(bool isEditing, bool reinitDrafBuffer) {
     reinitDraftTextBuffer();
   }
   m_currentDraftTextLength = strlen(m_draftTextBuffer);
-  if (m_cursorTextLocation < m_draftTextBuffer
-      || m_cursorTextLocation > m_draftTextBuffer + m_currentDraftTextLength)
+  if (m_cursorLocation < m_draftTextBuffer
+      || m_cursorLocation > m_draftTextBuffer + m_currentDraftTextLength)
   {
-    m_cursorTextLocation = m_draftTextBuffer + m_currentDraftTextLength;
+    m_cursorLocation = m_draftTextBuffer + m_currentDraftTextLength;
   }
   markRectAsDirty(bounds());
   layoutSubviews();
 }
 
 void TextField::ContentView::reinitDraftTextBuffer() {
-  setCursorTextLocation(m_draftTextBuffer);
+  setCursorLocation(m_draftTextBuffer);
   m_draftTextBuffer[0] = 0;
   m_currentDraftTextLength = 0;
 }
@@ -143,28 +143,28 @@ KDSize TextField::ContentView::minimalSizeForOptimalDisplay() const {
 
 bool TextField::ContentView::removeCodePoint() {
   assert(m_isEditing);
-  if (cursorTextLocation() <= m_draftTextBuffer) {
-    assert(cursorTextLocation() == m_draftTextBuffer);
+  if (cursorLocation() <= m_draftTextBuffer) {
+    assert(cursorLocation() == m_draftTextBuffer);
     return false;
   }
-  UTF8Decoder decoder(m_draftTextBuffer, cursorTextLocation());
+  UTF8Decoder decoder(m_draftTextBuffer, cursorLocation());
   decoder.previousCodePoint();
   const char * newCursorLocation = decoder.stringPosition();
 
-  assert(newCursorLocation < cursorTextLocation());
-  int removedCodePointLength = cursorTextLocation() - newCursorLocation;
+  assert(newCursorLocation < cursorLocation());
+  int removedCodePointLength = cursorLocation() - newCursorLocation;
   m_currentDraftTextLength-= removedCodePointLength;
 
   if (m_horizontalAlignment > 0.0f) {
     reloadRectFromPosition(m_draftTextBuffer);
   }
 
-  setCursorTextLocation(newCursorLocation);
+  setCursorLocation(newCursorLocation);
   if (m_horizontalAlignment == 0.0f) {
-    reloadRectFromPosition(cursorTextLocation());
+    reloadRectFromPosition(cursorLocation());
   }
 
-  for (char * k = const_cast<char *>(cursorTextLocation()); k < m_draftTextBuffer + m_currentDraftTextLength + removedCodePointLength; k++) {
+  for (char * k = const_cast<char *>(cursorLocation()); k < m_draftTextBuffer + m_currentDraftTextLength + removedCodePointLength; k++) {
     *k = *(k+removedCodePointLength);
     if (*k == 0) {
       break;
@@ -178,12 +178,12 @@ bool TextField::ContentView::removeCodePoint() {
 
 bool TextField::ContentView::removeEndOfLine() {
   assert(m_isEditing);
-  if (m_currentDraftTextLength == cursorTextLocation() - m_draftTextBuffer) {
+  if (m_currentDraftTextLength == cursorLocation() - m_draftTextBuffer) {
     return false;
   }
-  reloadRectFromPosition(m_horizontalAlignment == 0.0f ? cursorTextLocation() : m_draftTextBuffer);
-  m_currentDraftTextLength = cursorTextLocation() - m_draftTextBuffer;
-  *(const_cast<char *>(cursorTextLocation())) = 0;
+  reloadRectFromPosition(m_horizontalAlignment == 0.0f ? cursorLocation() : m_draftTextBuffer);
+  m_currentDraftTextLength = cursorLocation() - m_draftTextBuffer;
+  *(const_cast<char *>(cursorLocation())) = 0;
   layoutSubviews();
   return true;
 }
@@ -262,7 +262,7 @@ void TextField::setText(const char * text) {
   m_contentView.setText(text);
   /* Set the cursor location here and not in ContentView::setText so that
    * TextInput::willSetCursorLocation is called. */
-  setCursorTextLocation(m_contentView.draftTextBuffer()+strlen(text));
+  setCursorLocation(m_contentView.draftTextBuffer()+strlen(text));
 }
 
 void TextField::setAlignment(float horizontalAlignment, float verticalAlignment) {
@@ -286,7 +286,7 @@ bool TextField::privateHandleEvent(Ion::Events::Event event) {
   }
   if (isEditing() && shouldFinishEditing(event)) {
     char bufferText[ContentView::k_maxBufferSize];
-    const char * cursorLoc = cursorTextLocation();
+    const char * cursorLoc = cursorLocation();
     if (m_hasTwoBuffers) {
       strlcpy(bufferText, m_contentView.textBuffer(), ContentView::k_maxBufferSize);
       strlcpy(m_contentView.textBuffer(), m_contentView.draftTextBuffer(), m_contentView.bufferSize());
@@ -310,7 +310,7 @@ bool TextField::privateHandleEvent(Ion::Events::Event event) {
        * reset the textfield in the same state as before */
       setText(m_contentView.textBuffer());
       strlcpy(m_contentView.textBuffer(), bufferText, ContentView::k_maxBufferSize);
-      setCursorTextLocation(cursorLoc);
+      setCursorLocation(cursorLoc);
     }
     return true;
   }
@@ -359,7 +359,7 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
   /* Let's assume everything before the cursor is nested correctly, which is
    * reasonable if the expression is being entered left-to-right. */
   const char * text = this->text();
-  const char * location = cursorTextLocation();
+  const char * location = cursorLocation();
   UTF8Decoder decoder(text, text + (location - m_contentView.draftTextBuffer()));
   unsigned level = 0;
   while (location > m_contentView.draftTextBuffer()) {
@@ -431,25 +431,25 @@ void TextField::scrollToCursor() {
 }
 
 bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Left && isEditing() && cursorTextLocation() > m_contentView.draftTextBuffer()) {
+  if (event == Ion::Events::Left && isEditing() && cursorLocation() > m_contentView.draftTextBuffer()) {
     assert(isEditing());
-    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
+    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorLocation());
     decoder.previousCodePoint();
-    return setCursorTextLocation(decoder.stringPosition());
+    return setCursorLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftLeft && isEditing()) {
     assert(isEditing());
-    return setCursorTextLocation(m_contentView.draftTextBuffer());
+    return setCursorLocation(m_contentView.draftTextBuffer());
   }
-  if (event == Ion::Events::Right && isEditing() && cursorTextLocation() < m_contentView.draftTextBuffer() + draftTextLength()) {
+  if (event == Ion::Events::Right && isEditing() && cursorLocation() < m_contentView.draftTextBuffer() + draftTextLength()) {
     assert(isEditing());
-    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorTextLocation());
+    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorLocation());
     decoder.nextCodePoint();
-    return setCursorTextLocation(decoder.stringPosition());
+    return setCursorLocation(decoder.stringPosition());
   }
   if (event == Ion::Events::ShiftRight && isEditing()) {
     assert(isEditing());
-    return setCursorTextLocation(m_contentView.draftTextBuffer() + draftTextLength());
+    return setCursorLocation(m_contentView.draftTextBuffer() + draftTextLength());
   }
   return false;
 }
@@ -466,7 +466,7 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
   if (eventText[0] == 0) {
     /* For instance, the event might be EXE on a non-editing text field to start
      * edition. */
-    setCursorTextLocation(m_contentView.draftTextBuffer());
+    setCursorLocation(m_contentView.draftTextBuffer());
     return m_delegate->textFieldDidHandleEvent(this, true, previousTextLength != 0);
   }
 
@@ -476,18 +476,18 @@ bool TextField::handleEventWithText(const char * eventText, bool indentation, bo
   UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, eventText, UCodePointEmpty);
 
   const char * nextCursorLocation = m_contentView.draftTextBuffer() + draftTextLength();
-  if (insertTextAtLocation(buffer, cursorTextLocation())) {
+  if (insertTextAtLocation(buffer, cursorLocation())) {
     /* The cursor position depends on the text as we sometimes want to position
      * the cursor at the end of the text and sometimes after the first
      * parenthesis. */
-    nextCursorLocation = cursorTextLocation();
+    nextCursorLocation = cursorLocation();
     if (forceCursorRightOfText) {
       nextCursorLocation+= strlen(buffer);
     } else {
       nextCursorLocation+= TextInputHelpers::CursorPositionInCommand(eventText) - eventText;
     }
   }
-  setCursorTextLocation(nextCursorLocation);
+  setCursorLocation(nextCursorLocation);
   return m_delegate->textFieldDidHandleEvent(this, true, strlen(text()) != previousTextLength);
 }
 
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index 4fc3684fa..de0da525e 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -6,11 +6,11 @@
 static inline const char * minCharPointer(const char * x, const char * y) { return x < y ? x : y; }
 static inline const char * maxCharPointer(const char * x, const char * y) { return x > y ? x : y; }
 
-void TextInput::ContentView::setCursorTextLocation(const char * location) {
+void TextInput::ContentView::setCursorLocation(const char * location) {
   assert(location != nullptr);
   assert(location >= editedText());
   const char * adjustedLocation = minCharPointer(location, editedText() + editedTextLength());
-  m_cursorTextLocation = adjustedLocation;
+  m_cursorLocation = adjustedLocation;
   layoutSubviews();
 }
 
@@ -20,7 +20,7 @@ void TextInput::ContentView::setFont(const KDFont * font) {
 }
 
 KDRect TextInput::ContentView::cursorRect() {
-  return glyphFrameAtPosition(m_cursorTextLocation);
+  return glyphFrameAtPosition(m_cursorLocation);
 }
 
 void TextInput::ContentView::layoutSubviews() {
@@ -68,11 +68,11 @@ void TextInput::scrollToCursor() {
   scrollToContentRect(contentView()->cursorRect(), true);
 }
 
-bool TextInput::setCursorTextLocation(const char * location) {
+bool TextInput::setCursorLocation(const char * location) {
   assert(location != nullptr);
   const char * adjustedLocation = maxCharPointer(location, text());
-  willSetCursorTextLocation(&adjustedLocation);
-  contentView()->setCursorTextLocation(adjustedLocation);
+  willSetCursorLocation(&adjustedLocation);
+  contentView()->setCursorLocation(adjustedLocation);
   scrollToCursor();
   return true;
 }

From adf5bd31744010bdc984b7322aeb8c50d39c6a8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 16:26:14 +0100
Subject: [PATCH 048/295] [utf8_decoder] Better code for CharSizeOfCodePoint

---
 ion/src/shared/unicode/utf8_decoder.cpp | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index 5f97d0bf8..e70e08683 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -56,9 +56,16 @@ CodePoint UTF8Decoder::previousCodePoint() {
 }
 
 size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
-  constexpr int bufferSize = CodePoint::MaxCodePointCharLength;
-  char buffer[bufferSize];
-  return CodePointToChars(c, buffer, bufferSize);
+  if (c <= 0x7F) {
+    return 1;
+  }
+  if (c <= 0x7FF) {
+    return 2;
+  }
+  if (c <= 0xFFFF) {
+    return 3;
+  }
+  return 4;
 }
 
 size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize) {
@@ -66,19 +73,21 @@ size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize)
     return 0;
   }
   size_t i = 0;
-  if (c <= 0x7F) {
+  int charCount = CharSizeOfCodePoint(c);
+  if (charCount == 1) {
     buffer[i++] = c;
-  } else if (c <= 0x7FF) {
+  } else if (charCount == 2) {
     buffer[i++] = 0b11000000 | (c >> 6);
     if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
-  } else if (c <= 0xFFFF) {
+  } else if (charCount == 3) {
     buffer[i++] = 0b11100000 | (c >> 12);
     if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
     if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   } else {
+    assert(charCount == 4);
     buffer[i++] = 0b11110000 | (c >> 18);
     if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | ((c >> 12) & 0b111111);
@@ -87,5 +96,6 @@ size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize)
     if (bufferSize <= i) { return i; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   }
-  return i;
+  assert(i == charCount);
+  return charCount;
 }

From e6b61b257b0275de1e964131b868f2f39c081560 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 23 Jan 2019 17:00:48 +0100
Subject: [PATCH 049/295] [unicode] Methods optimized when code points are one
 char long

---
 escher/src/text_area.cpp               | 31 ++++++++-------
 ion/include/ion/unicode/utf8_helper.h  | 14 +++++--
 ion/src/shared/unicode/utf8_helper.cpp | 52 ++++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 19 deletions(-)

diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index d08d62535..9be7ccf52 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -97,32 +97,31 @@ void TextArea::setText(char * textBuffer, size_t textBufferSize) {
 }
 
 bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * location) {
+  // Compute the indentation
   int indentation = indentationBeforeCursor();
   const char * previousChar = cursorLocation()-1;
   if (previousChar >= const_cast<TextArea *>(this)->contentView()->text() && *previousChar == ':') {
     indentation += k_indentationSpaces;
   }
+
+  // Check the text will not overflow the buffer
+  int totalIndentationSize = UTF8Helper::CountOccurrences(textBuffer, '\n') * indentation;
   int textSize = strlen(textBuffer);
-  int totalIndentationSize = 0;
-  for (size_t i = 0; i < textSize; i++) {
-    // No need to use the UTF8Decoder here, because we look for an ASCII char.
-    if (textBuffer[i] == '\n') {
-      totalIndentationSize+= indentation;
-    }
-  }
   if (contentView()->getText()->textLength() + textSize + totalIndentationSize >= contentView()->getText()->bufferSize() || textSize == 0) {
     return false;
   }
+
+  // Insert the text
   insertTextAtLocation(textBuffer, location);
-  const char * currentLocation = location;
-  int currentIndex = location - contentView()->text();
-  for (size_t i = 0; i < textSize; i++) {
-    // No need to use the UTF8Decoder here, because we look for an ASCII char.
-    if (textBuffer[currentIndex + i] == '\n') {
-      const_cast<Text *>(contentView()->getText())->insertSpacesAtLocation(indentation, const_cast<char *>(currentLocation));
-      currentIndex+= indentation;
-    }
-  }
+
+  // Insert the indentation
+  UTF8Helper::PerformAtCodePoints(
+      textBuffer, '\n',
+      [](char * codePointLocation, void * text, int indentation){
+        ((Text *)text)->insertSpacesAtLocation(indentation, codePointLocation);
+      },
+      (void *)(contentView()->getText()),
+      indentation);
   return true;
 }
 
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index bc0e55c59..167aa0028 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -6,12 +6,20 @@
 
 namespace UTF8Helper {
 
+// Returns the number of occurences of a code point in a string
+int CountOccurrences(const char * s, CodePoint c);
+
+// Returns the first occurence of a code point in a string
 const char * CodePointSearch(const char * s, CodePoint c);
-/* CopyAndRemoveCodePoint copies src into dst while removing all code points c.
- * It also updates an index that should be lower if code points where removed
- * before it. */
+
+/* Copy src into dst while removing all code points c. Also update an index
+ * that should be lower if code points where removed before it. */
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
+// Perform an action each time a code point is found
+typedef void (*CodePointAction)(char * codePointLocation, void * contextPointer, int contextInt);
+void PerformAtCodePoints(const char * s, CodePoint c, CodePointAction action, void * contextPointer, int contextInt);
+
 };
 
 #endif
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 62b9e888b..48997b453 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -7,6 +7,32 @@ namespace UTF8Helper {
 
 static inline int minInt(int x, int y) { return x < y ? x : y; }
 
+int CountOccurrences(const char * s, CodePoint c) {
+  int count = 0;
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
+    /* The code point is one char long, so it is equal to its char translation.
+     * We can do a classic char search. */
+    const char * i = s;
+    while (*i != 0) {
+      if (*i == c) {
+        count++;
+      }
+      i++;
+    }
+  } else {
+    // The code point is more than one char long, we use a UTF8Decoder.
+    UTF8Decoder decoder(s);
+    CodePoint codePoint = decoder.nextCodePoint();
+    while (codePoint != UCodePointNull) {
+      if (codePoint == c) {
+        count++;
+      }
+      codePoint = decoder.nextCodePoint();
+    }
+  }
+  return count;
+}
+
 const char * CodePointSearch(const char * s, CodePoint c) {
   UTF8Decoder decoder(s);
   const char * currentPointer = s;
@@ -48,4 +74,30 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
   }
 }
 
+void PerformAtCodePoints(const char * s, CodePoint c, CodePointAction action, void * contextPointer, int contextInt) {
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
+    /* The code point is one char long, so it is equal to its char translation.
+     * We can do a classic char search. */
+    const char * i = s;
+    while (*i != 0) {
+      if (*i == c) {
+        action(const_cast<char *>(i), contextPointer, contextInt);
+      }
+      i++;
+    }
+  } else {
+    // The code point is more than one char long, we use a UTF8Decoder.
+    UTF8Decoder decoder(s);
+    const char * codePointPointer = decoder.stringPosition();
+    CodePoint codePoint = decoder.nextCodePoint();
+    while (codePoint != UCodePointNull) {
+      if (codePoint == c) {
+        action(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+      }
+      codePointPointer = decoder.stringPosition();
+      codePoint = decoder.nextCodePoint();
+    }
+  }
+}
+
 };

From 9e06b23bbb50029e2eadae22aa2ec068830e7b15 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 11:06:07 +0100
Subject: [PATCH 050/295] [escher/ion] Standard methods in UTF8Helper used in
 text_area

String manipulations need to be done using an UTF8 decoder, but some
manipulations can be optimized if the code points we manipulate are only
one char long. These optimizations are done inside UTF8Helper methods.
---
 apps/solver/equation.cpp               |   2 +-
 escher/include/escher/text_area.h      |   2 +-
 escher/src/text_area.cpp               |  67 +++++++++-------
 ion/include/ion/unicode/utf8_helper.h  |  29 ++++++-
 ion/src/shared/unicode/utf8_helper.cpp | 103 +++++++++++++++++++++----
 poincare/src/expression.cpp            |   2 +-
 6 files changed, 153 insertions(+), 52 deletions(-)

diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index df6212056..fa10a8c09 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -50,7 +50,7 @@ Expression Equation::standardForm(Context * context) const {
 }
 
 bool Equation::containsIComplex() const {
-  return UTF8Helper::CodePointSearch(text(), UCodePointMathematicalBoldSmallI) != nullptr;
+  return *(UTF8Helper::CodePointSearch(text(), UCodePointMathematicalBoldSmallI)) != 0;
 }
 
 void Equation::tidyStandardForm() {
diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 0f9fa8b77..d861d27e3 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -30,7 +30,7 @@ protected:
       m_buffer = buffer;
       m_bufferSize = bufferSize;
     }
-    const char * text() const { return const_cast<const char *>(m_buffer); }
+    const char * text() const { return m_buffer; }
 
     class Line {
     public:
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 9be7ccf52..cddf40b23 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -99,8 +99,8 @@ void TextArea::setText(char * textBuffer, size_t textBufferSize) {
 bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * location) {
   // Compute the indentation
   int indentation = indentationBeforeCursor();
-  const char * previousChar = cursorLocation()-1;
-  if (previousChar >= const_cast<TextArea *>(this)->contentView()->text() && *previousChar == ':') {
+  const char * buffer = contentView()->text();
+  if (cursorLocation() > buffer && UTF8Helper::PreviousCodePointIs(buffer, cursorLocation(), ':')) {
     indentation += k_indentationSpaces;
   }
 
@@ -117,26 +117,29 @@ bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * l
   // Insert the indentation
   UTF8Helper::PerformAtCodePoints(
       textBuffer, '\n',
-      [](char * codePointLocation, void * text, int indentation){
+      [](char * codePointLocation, void * text, int indentation) {
         ((Text *)text)->insertSpacesAtLocation(indentation, codePointLocation);
       },
+      [](char * c1, void * c2, int c3) { },
       (void *)(contentView()->getText()),
       indentation);
   return true;
 }
 
 int TextArea::indentationBeforeCursor() const {
-  const char * p = cursorLocation()-1;
   int indentationSize = 0;
-  // No need to use the UTF8Decoder here, be cause we look for an ASCII char.
-  while (p >= const_cast<TextArea *>(this)->contentView()->text() && *p != '\n') {
-    if (*p == ' ') {
-      indentationSize++;
-    } else {
-      indentationSize = 0;
-    }
-    p--;
-  }
+  /* Compute the number of spaces at the beginning of the line. Increase the
+   * indentation size when encountering spaces, reset it to 0 when encountering
+   * another code point, until reaching the beginning of the line. */
+  UTF8Helper::PerformAtCodePoints(const_cast<TextArea *>(this)->contentView()->text(), ' ',
+      [](char * codePointLocation, void * indentationSize, int context){
+        int * castedSize = (int *) indentationSize;
+        *castedSize = *castedSize + 1;
+      },
+      [](char * codePointLocation, void * indentationSize, int context){
+        *((int *) indentationSize) = 0;
+      },
+      &indentationSize, 0, '\n', false, cursorLocation());
   return indentationSize;
 }
 
@@ -208,6 +211,7 @@ CodePoint TextArea::Text::removeCodePoint(const char * * position) {
 
   // Shift the buffer
   int codePointSize = *position - newCursorLocation;
+  assert(codePointSize == UTF8Decoder::CharSizeOfCodePoint(deletedCodePoint));
   assert(newCursorLocation >= m_buffer);
   for (size_t i = newCursorLocation - m_buffer; i < m_bufferSize; i++) {
     m_buffer[i] = m_buffer[i + codePointSize];
@@ -269,11 +273,7 @@ TextArea::Text::Line::Line(const char * text) :
   m_charLength(0)
 {
   if (m_text != nullptr) {
-    // No need to use the UTF8Decoder here, because we look for an ASCII char.
-    while (*text != 0 && *text != '\n') {
-      text++;
-    }
-    m_charLength = text - m_text;
+    m_charLength = UTF8Helper::CodePointSearch(text, '\n') - m_text;
   }
 }
 
@@ -284,14 +284,18 @@ KDCoordinate TextArea::Text::Line::glyphWidth(const KDFont * const font) const {
 bool TextArea::Text::Line::contains(const char * c) const {
   return (c >= m_text)
     && ((c < m_text + m_charLength)
-        || (c == m_text + m_charLength && (*c == 0 || *c == '\n'))) ;
+        || (c == m_text + m_charLength
+          && (UTF8Helper::CodePointIs(c, 0)
+            || UTF8Helper::CodePointIs(c, '\n')))) ;
 }
 
 /* TextArea::Text::LineIterator */
 
 TextArea::Text::LineIterator & TextArea::Text::LineIterator::operator++() {
   const char * last = m_line.text() + m_line.charLength();
-  m_line = Line(*last == 0 ? nullptr : last+1);
+  assert(UTF8Helper::CodePointIs(last, 0) || UTF8Helper::CodePointIs(last, '\n'));
+  assert(UTF8Decoder::CharSizeOfCodePoint('\n') == 1);
+  m_line = Line(UTF8Helper::CodePointIs(last, 0) ? nullptr : last + 1);
   return *this;
 }
 
@@ -376,14 +380,18 @@ bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, co
   bool lineBreak = false;
 
   // Scan for \n and 0
-  const char * textScanner = text;
-  while (*textScanner != 0) {
-    textScanner++;
-    lineBreak |= *textScanner == '\n';
-  }
-  assert(*textScanner == 0);
-  m_text.insertText(text, textScanner - text, const_cast<char *>(location));
-  reloadRectFromPosition(location/*-1 TODO  LEA */, lineBreak);
+  const char * nullLocation = UTF8Helper::PerformAtCodePoints(
+      text, '\n',
+      [](char * codePointLocation, void * lineBreak, int indentation) {
+        *((bool *)lineBreak) = true;
+      },
+      [](char * c1, void * c2, int c3) { },
+      &lineBreak,
+      0);
+
+  assert(UTF8Helper::CodePointIs(nullLocation, 0));
+  m_text.insertText(text, nullLocation - text, const_cast<char *>(location));
+  reloadRectFromPosition(location, lineBreak);
   return true;
 }
 
@@ -416,7 +424,7 @@ bool TextArea::ContentView::removeStartOfLine() {
     assert(cursorLocation() == text());
     return false;
   }
-  size_t removedLine = m_text.removeRemainingLine(cursorLocation(), -1); //TODO LEA Before : cursorLocation()-1
+  size_t removedLine = m_text.removeRemainingLine(cursorLocation(), -1);
   if (removedLine > 0) {
     assert(cursorLocation() >= text() + removedLine);
     setCursorLocation(cursorLocation() - removedLine);
@@ -442,6 +450,7 @@ KDRect TextArea::ContentView::glyphFrameAtPosition(const char * position) const
     y++;
   }
   assert(found);
+  (void) found;
 
   return KDRect(
     x,
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 167aa0028..8a19ec440 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -9,16 +9,39 @@ namespace UTF8Helper {
 // Returns the number of occurences of a code point in a string
 int CountOccurrences(const char * s, CodePoint c);
 
-// Returns the first occurence of a code point in a string
+/* Returns the first occurence of a code point in a string, the position of the
+ * null terminating char otherwise. */
 const char * CodePointSearch(const char * s, CodePoint c);
 
 /* Copy src into dst while removing all code points c. Also update an index
  * that should be lower if code points where removed before it. */
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
-// Perform an action each time a code point is found
+/* Perform actionCodePoint each time a given code point is found, and
+ * actionOtherCodePoint for other code points.
+ * goingRight tells if we are decoding towards the right or the left. If
+ * goingRight is false, initialPosition must be provided, and the action is not
+ * done for *(initial position) even if it matches c.
+ * The return value is the first address for which we did not perform an action.
+ *
+ *                                         x = actionCodePoint is performed
+ *                                         o = actionOtherCodePoint is performed
+ * Going right == true:                    s = stoppingCodePoint
+ *     o  o  o  o  x  x  o  o  x  o
+ *    |  |  |  |  |c |c |  |  |c |  |s |  |  |c |
+ *    ^start of string
+ *
+ * Going right == false:
+ *     o  o  o  o  x  x  o  o
+ *    |  |c |  |s |c |c |  |  |c |  |  |c |  |  |
+ *    ^start of string        ^initialPosition
+ *
+ * */
 typedef void (*CodePointAction)(char * codePointLocation, void * contextPointer, int contextInt);
-void PerformAtCodePoints(const char * s, CodePoint c, CodePointAction action, void * contextPointer, int contextInt);
+const char *  PerformAtCodePoints(const char * string, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint = UCodePointNull, bool goingRight = true, const char * initialPosition = nullptr);
+
+bool PreviousCodePointIs(const char * buffer, const char * location, CodePoint c);
+bool CodePointIs(const char * location, CodePoint c);
 
 };
 
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 48997b453..79e4a7659 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -34,6 +34,13 @@ int CountOccurrences(const char * s, CodePoint c) {
 }
 
 const char * CodePointSearch(const char * s, CodePoint c) {
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
+    const char * result = s;
+    while (*result != 0 && *result != c) {
+      result++;
+    }
+    return result;
+  }
   UTF8Decoder decoder(s);
   const char * currentPointer = s;
   CodePoint codePoint = decoder.nextCodePoint();
@@ -43,10 +50,7 @@ const char * CodePointSearch(const char * s, CodePoint c) {
     codePoint = decoder.nextCodePoint();
     nextPointer = decoder.stringPosition();
   }
-  if (codePoint == c) {
-    return currentPointer;
-  }
-  return nullptr;
+  return currentPointer;
 }
 
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * pointerToUpdate) {
@@ -74,30 +78,95 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
   }
 }
 
-void PerformAtCodePoints(const char * s, CodePoint c, CodePointAction action, void * contextPointer, int contextInt) {
-  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
-    /* The code point is one char long, so it is equal to its char translation.
-     * We can do a classic char search. */
-    const char * i = s;
-    while (*i != 0) {
-      if (*i == c) {
-        action(const_cast<char *>(i), contextPointer, contextInt);
+const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint, bool goingRight, const char * initialPosition) {
+  /* If we are decoding towards the left, we must have a starting position. If
+   * we are decoding towards the right, the starting position is the start of
+   * string. */
+  assert((goingRight && initialPosition == nullptr)
+      || (!goingRight && initialPosition != nullptr));
+
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1 && UTF8Decoder::CharSizeOfCodePoint(stoppingCodePoint) == 1) {
+    /* The code points are one char long, so they are equal to their char
+     * translations. We can do a classic char search. */
+    if (goingRight) {
+      const char * i = s;
+      while (*i != stoppingCodePoint && *i != 0) {
+        if (*i == c) {
+          actionCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+        } else {
+          actionOtherCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+        }
+        i++;
       }
-      i++;
+      return i;
     }
-  } else {
-    // The code point is more than one char long, we use a UTF8Decoder.
+    const char * i = initialPosition - 1;
+    while (i >= s && *i != stoppingCodePoint) {
+      if (*i == c) {
+        actionCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+      } else {
+        actionOtherCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+      }
+      i--;
+    }
+    return i;
+  }
+  // The code point is more than one char long, we use a UTF8Decoder.
+  if (goingRight) {
     UTF8Decoder decoder(s);
     const char * codePointPointer = decoder.stringPosition();
     CodePoint codePoint = decoder.nextCodePoint();
-    while (codePoint != UCodePointNull) {
+    while (codePoint != stoppingCodePoint && codePoint != UCodePointNull) {
       if (codePoint == c) {
-        action(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+        actionCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+      } else {
+        actionOtherCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
       }
       codePointPointer = decoder.stringPosition();
       codePoint = decoder.nextCodePoint();
     }
+    return codePointPointer;
   }
+  assert(!goingRight);
+  if (initialPosition <= s) {
+    return initialPosition;
+  }
+  UTF8Decoder decoder(s, initialPosition);
+  CodePoint codePoint = decoder.previousCodePoint();
+  const char * codePointPointer = decoder.stringPosition();
+  while (codePointPointer >= s && codePoint != stoppingCodePoint) {
+    if (codePoint == c) {
+      actionCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+    } else {
+      actionOtherCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+    }
+    if (codePointPointer > s) {
+      codePoint = decoder.previousCodePoint();
+      codePointPointer = decoder.stringPosition();
+    } else {
+      /* If the current pointer is s, we cannot continue decoding. Decreasing s
+       * will stop the while loop. */
+      codePointPointer = s-1;
+    }
+  }
+  return codePointPointer;
+}
+
+bool PreviousCodePointIs(const char * buffer, const char * location, CodePoint c) {
+  assert(location > buffer);
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
+    return *(location -1) == c;
+  }
+  UTF8Decoder decoder(buffer, location);
+  return decoder.previousCodePoint() == c;
+}
+
+bool CodePointIs(const char * location, CodePoint c) {
+  if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
+    return *(location) == c;
+  }
+  UTF8Decoder decoder(location);
+  return decoder.nextCodePoint() == c;
 }
 
 };
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 1a9dad03a..4b0078525 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -343,7 +343,7 @@ void Expression::SetEncounteredComplex(bool encounterComplex) {
 }
 
 Preferences::ComplexFormat Expression::UpdatedComplexFormatWithTextInput(Preferences::ComplexFormat complexFormat, const char * textInput) {
-  if (complexFormat == Preferences::ComplexFormat::Real && UTF8Helper::CodePointSearch(textInput, UCodePointMathematicalBoldSmallI) != nullptr) {
+  if (complexFormat == Preferences::ComplexFormat::Real && *(UTF8Helper::CodePointSearch(textInput, UCodePointMathematicalBoldSmallI)) != 0) {
     return Preferences::ComplexFormat::Cartesian;
   }
   return complexFormat;

From f9fbcabb3013237b86a7eafdaf1956b8ef9f1063 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 11:34:50 +0100
Subject: [PATCH 051/295] [escher/ion] Factorize code for removing a code point
 in text field/area

---
 escher/include/escher/text_area.h      |  2 +-
 escher/src/text_area.cpp               | 26 +++++++----------------
 escher/src/text_field.cpp              | 29 ++++++++++----------------
 ion/include/ion/unicode/utf8_helper.h  |  4 ++++
 ion/src/shared/unicode/utf8_helper.cpp | 23 ++++++++++++++++++++
 5 files changed, 46 insertions(+), 38 deletions(-)

diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index d861d27e3..95d215b41 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -75,7 +75,7 @@ protected:
     void insertText(const char * s, int textLength, char * location);
     void insertSpacesAtLocation(int numberOfSpaces, char * location);
 
-    CodePoint removeCodePoint(const char * * position);
+    CodePoint removeCodePoint(char * * position);
     size_t removeRemainingLine(const char * position, int direction);
     char operator[](size_t index) {
       assert(index < m_bufferSize);
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index cddf40b23..694f26be5 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -199,29 +199,17 @@ void TextArea::Text::insertSpacesAtLocation(int numberOfSpaces, char * location)
   }
 }
 
-CodePoint TextArea::Text::removeCodePoint(const char * * position) {
+CodePoint TextArea::Text::removeCodePoint(char * * position) {
   assert(m_buffer != nullptr);
   assert(m_buffer <= *position && *position < m_buffer + m_bufferSize);
 
-  // Find the beginning of the previous code point
-  UTF8Decoder decoder(m_buffer, *position);
-  CodePoint deletedCodePoint = decoder.previousCodePoint();
-  const char * newCursorLocation = decoder.stringPosition();
-  assert(newCursorLocation < *position);
+  CodePoint removedCodePoint = 0;
+  int removedSize = UTF8Helper::RemovePreviousCodePoint(m_buffer, *position, &removedCodePoint);
+  assert(removedSize > 0);
 
-  // Shift the buffer
-  int codePointSize = *position - newCursorLocation;
-  assert(codePointSize == UTF8Decoder::CharSizeOfCodePoint(deletedCodePoint));
-  assert(newCursorLocation >= m_buffer);
-  for (size_t i = newCursorLocation - m_buffer; i < m_bufferSize; i++) {
-    m_buffer[i] = m_buffer[i + codePointSize];
-    if (m_buffer[i] == 0) {
-      break;
-    }
-  }
   // Set the new cursor position
-  *position = newCursorLocation;
-  return deletedCodePoint;
+  *position = *position - removedSize;
+  return removedCodePoint;
 }
 
 size_t TextArea::Text::removeRemainingLine(const char * location, int direction) {
@@ -401,7 +389,7 @@ bool TextArea::TextArea::ContentView::removeCodePoint() {
     return false;
   }
   bool lineBreak = false;
-  const char * cursorLoc = cursorLocation();
+  char * cursorLoc = const_cast<char *>(cursorLocation());
   lineBreak = m_text.removeCodePoint(&cursorLoc) == '\n';
   setCursorLocation(cursorLoc); // Update the cursor
   layoutSubviews(); // Reposition the cursor
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 6482a6dd5..713999917 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -143,35 +143,28 @@ KDSize TextField::ContentView::minimalSizeForOptimalDisplay() const {
 
 bool TextField::ContentView::removeCodePoint() {
   assert(m_isEditing);
-  if (cursorLocation() <= m_draftTextBuffer) {
+
+  // Remove the code point if possible
+  CodePoint removedCodePoint = 0;
+  int removedSize = UTF8Helper::RemovePreviousCodePoint(m_draftTextBuffer, const_cast<char *>(cursorLocation()), &removedCodePoint);
+  if (removedSize == 0) {
     assert(cursorLocation() == m_draftTextBuffer);
     return false;
   }
-  UTF8Decoder decoder(m_draftTextBuffer, cursorLocation());
-  decoder.previousCodePoint();
-  const char * newCursorLocation = decoder.stringPosition();
 
-  assert(newCursorLocation < cursorLocation());
-  int removedCodePointLength = cursorLocation() - newCursorLocation;
-  m_currentDraftTextLength-= removedCodePointLength;
+  // Update the draft buffer length
+  m_currentDraftTextLength-= removedSize;
+  assert(m_draftTextBuffer[m_currentDraftTextLength] == 0);
 
+  // Reload the view and set the cursor location
   if (m_horizontalAlignment > 0.0f) {
     reloadRectFromPosition(m_draftTextBuffer);
   }
-
-  setCursorLocation(newCursorLocation);
+  assert(cursorLocation() - removedSize >= m_draftTextBuffer);
+  setCursorLocation(cursorLocation() - removedSize);
   if (m_horizontalAlignment == 0.0f) {
     reloadRectFromPosition(cursorLocation());
   }
-
-  for (char * k = const_cast<char *>(cursorLocation()); k < m_draftTextBuffer + m_currentDraftTextLength + removedCodePointLength; k++) {
-    *k = *(k+removedCodePointLength);
-    if (*k == 0) {
-      break;
-    }
-  }
-
-  assert(m_draftTextBuffer[m_currentDraftTextLength] == 0);
   layoutSubviews();
   return true;
 }
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 8a19ec440..5dc1c6099 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -43,6 +43,10 @@ const char *  PerformAtCodePoints(const char * string, CodePoint c, CodePointAct
 bool PreviousCodePointIs(const char * buffer, const char * location, CodePoint c);
 bool CodePointIs(const char * location, CodePoint c);
 
+// Shift the buffer and return the number of bytes removed.
+int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c);
+
+
 };
 
 #endif
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 79e4a7659..9bc689032 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -169,4 +169,27 @@ bool CodePointIs(const char * location, CodePoint c) {
   return decoder.nextCodePoint() == c;
 }
 
+int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c) {
+  assert(c != nullptr);
+  if (location <= text) {
+    assert(location == text);
+    return 0;
+  }
+
+  // Find the previous code point
+  UTF8Decoder decoder(text, location);
+  *c = decoder.previousCodePoint();
+
+  // Shift the buffer
+  int codePointSize = UTF8Decoder::CharSizeOfCodePoint(*c);
+  char * iterator = location - codePointSize;
+  assert(iterator >= text);
+  do {
+    *iterator = *(iterator + codePointSize);
+    iterator++;
+  } while (*(iterator - 1) != 0); // Stop shifting after writing a null terminating char.
+
+  return codePointSize;
+}
+
 };

From 39f6f4f5bb6026534f00b5049674a7febe91f0c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 13:38:50 +0100
Subject: [PATCH 052/295] Remove compilation warnings

---
 escher/image/inliner.c                  | 4 ++--
 escher/src/text_field.cpp               | 5 +++--
 ion/include/ion/unicode/utf8_decoder.h  | 2 +-
 ion/src/shared/unicode/utf8_decoder.cpp | 3 ++-
 4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/escher/image/inliner.c b/escher/image/inliner.c
index 67d983feb..a2f49e655 100644
--- a/escher/image/inliner.c
+++ b/escher/image/inliner.c
@@ -179,8 +179,8 @@ void generateImplementationFromImage(FILE * file, const char * header, const cha
   int maxSizeOfCompressedPixelBuffer = LZ4_compressBound(sizeOfPixelBuffer);
   uint8_t * compressedPixelBuffer = malloc(maxSizeOfCompressedPixelBuffer);
   int sizeOfCompressedPixelBuffer = LZ4_compress_HC(
-    pixelBuffer,
-    compressedPixelBuffer,
+    (const char *)pixelBuffer,
+    (char *)compressedPixelBuffer,
     sizeOfPixelBuffer,
     maxSizeOfCompressedPixelBuffer,
     LZ4HC_CLEVEL_MAX
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 713999917..3e795925d 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -171,11 +171,12 @@ bool TextField::ContentView::removeCodePoint() {
 
 bool TextField::ContentView::removeEndOfLine() {
   assert(m_isEditing);
-  if (m_currentDraftTextLength == cursorLocation() - m_draftTextBuffer) {
+  size_t lengthToCursor = (size_t)(cursorLocation() - m_draftTextBuffer);
+  if (m_currentDraftTextLength == lengthToCursor) {
     return false;
   }
   reloadRectFromPosition(m_horizontalAlignment == 0.0f ? cursorLocation() : m_draftTextBuffer);
-  m_currentDraftTextLength = cursorLocation() - m_draftTextBuffer;
+  m_currentDraftTextLength = lengthToCursor;
   *(const_cast<char *>(cursorLocation())) = 0;
   layoutSubviews();
   return true;
diff --git a/ion/include/ion/unicode/utf8_decoder.h b/ion/include/ion/unicode/utf8_decoder.h
index 7b309b2dc..430075a83 100644
--- a/ion/include/ion/unicode/utf8_decoder.h
+++ b/ion/include/ion/unicode/utf8_decoder.h
@@ -28,7 +28,7 @@ public:
   CodePoint previousCodePoint();
   const char * stringPosition() const { return m_stringPosition; }
   static size_t CharSizeOfCodePoint(CodePoint c);
-  static size_t CodePointToChars(CodePoint c, char * buffer, int bufferSize);
+  static size_t CodePointToChars(CodePoint c, char * buffer, size_t bufferSize);
 private:
   const char * const m_string;
   const char * m_stringPosition;
diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index e70e08683..73ef028a1 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -9,6 +9,7 @@ static inline int leading_ones(uint8_t value) {
     value = value << 1;
   }
   assert(false);
+  return 0;
 }
 
 static inline uint8_t last_k_bits(uint8_t value, uint8_t bits) {
@@ -68,7 +69,7 @@ size_t UTF8Decoder::CharSizeOfCodePoint(CodePoint c) {
   return 4;
 }
 
-size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, int bufferSize) {
+size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, size_t bufferSize) {
   if (bufferSize <= 0) {
     return 0;
   }

From 293517892c1f2c51c2d304078b6e3ab6c6127891 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 13:48:05 +0100
Subject: [PATCH 053/295] Remove useless comment

---
 kandinsky/fonts/code_points.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index 42da24c24..01c5bb6cb 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -143,8 +143,6 @@ uint32_t CodePoints[] = {
   0x2264,  // ≤ // LESS-THAN OR EQUAL TO
   0x2265,  // ≥ // GREATER-THAN OR EQUAL TO
   0x1d422, // 𝐢 // MATHEMATICAL BOLD SMALL I"
-
-  // Apostrophe
 };
 
 int NumberOfCodePoints = sizeof(CodePoints)/sizeof(CodePoints[0]);

From 2f3aa51c8c3512f2e41d15f9c44a3e8fe0c67de2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 14:21:04 +0100
Subject: [PATCH 054/295] [unicode] Use unicode when dealing with chars - Part
 1

---
 ion/include/ion.h                             |  2 +
 ion/include/ion/unicode/utf8_helper.h         |  3 ++
 ion/src/shared/storage.cpp                    | 15 ++++---
 ion/src/shared/unicode/utf8_helper.cpp        | 17 +++++++
 .../poincare/left_parenthesis_layout.h        |  2 +-
 .../poincare/left_square_bracket_layout.h     |  2 +-
 .../poincare/right_parenthesis_layout.h       |  2 +-
 .../poincare/right_square_bracket_layout.h    |  2 +-
 poincare/include/poincare/sequence_layout.h   |  2 +-
 .../include/poincare/serialization_helper.h   |  4 +-
 poincare/include/poincare/symbol.h            |  3 +-
 poincare/src/bracket_pair_layout.cpp          |  6 ++-
 poincare/src/decimal.cpp                      | 45 +++++++++++--------
 poincare/src/factorial.cpp                    | 18 ++++----
 poincare/src/fraction_layout.cpp              |  4 +-
 poincare/src/integer.cpp                      | 20 +++++----
 poincare/src/integral_layout.cpp              |  5 ++-
 poincare/src/matrix.cpp                       | 18 +++++---
 poincare/src/matrix_layout.cpp                |  9 ++--
 poincare/src/nth_root_layout.cpp              |  4 +-
 poincare/src/opposite.cpp                     |  8 +++-
 poincare/src/parsing/tokenizer.cpp            |  3 +-
 poincare/src/print_float.cpp                  | 18 +++++++-
 poincare/src/rational.cpp                     | 17 ++++---
 poincare/src/sequence_layout.cpp              |  8 ++--
 poincare/src/serialization_helper.cpp         | 37 +++++++--------
 poincare/src/symbol.cpp                       | 23 ++++++----
 poincare/src/symbol_abstract.cpp              | 10 ++---
 poincare/src/vertical_offset_layout.cpp       |  6 +--
 29 files changed, 185 insertions(+), 128 deletions(-)

diff --git a/ion/include/ion.h b/ion/include/ion.h
index 74e62514b..8049b52f8 100644
--- a/ion/include/ion.h
+++ b/ion/include/ion.h
@@ -12,6 +12,8 @@
 #include <ion/storage.h>
 #include <ion/timing.h>
 #include <ion/usb.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 #include <stdint.h>
 #include <string.h>
 
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 5dc1c6099..ca7123e0f 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -17,6 +17,9 @@ const char * CodePointSearch(const char * s, CodePoint c);
  * that should be lower if code points where removed before it. */
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
+/* Copy src into dst until end of dst or code point c, with null termination. Return the length of the copy */
+size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c);
+
 /* Perform actionCodePoint each time a given code point is found, and
  * actionOtherCodePoint for other code points.
  * goingRight tells if we are decoding towards the right or the left. If
diff --git a/ion/src/shared/storage.cpp b/ion/src/shared/storage.cpp
index b08ccc900..e2b61ed72 100644
--- a/ion/src/shared/storage.cpp
+++ b/ion/src/shared/storage.cpp
@@ -34,8 +34,8 @@ Storage::Record::Record(const char * fullName) {
     m_fullNameCRC32 = 0;
     return;
   }
-  const char * dotChar = strchr(fullName, k_dotChar);
-  assert(dotChar != nullptr);
+  const char * dotChar = UTF8Helper::CodePointSearch(fullName, k_dotChar);
+  assert(*dotChar != 0);
   assert(*(dotChar+1) != 0); // Assert there is an extension
   new (this) Record(fullName, dotChar - fullName, dotChar+1, (fullName + strlen(fullName)) - (dotChar+1));
 }
@@ -206,7 +206,7 @@ Storage::Record Storage::recordBaseNamedWithExtensions(const char * baseName, co
     if (strncmp(baseName, currentName, nameLength) == 0) {
       for (size_t i = 0; i < numberOfExtensions; i++) {
         if (strcmp(currentName+nameLength+1 /*+1 to pass the dot*/, extensions[i]) == 0) {
-          assert(*(currentName + nameLength) == '.');
+          assert(UTF8Helper::CodePointIs(currentName + nameLength, '.'));
           return Record(currentName);
         }
       }
@@ -375,6 +375,7 @@ size_t Storage::overrideFullNameAtPosition(char * position, const char * fullNam
 
 size_t Storage::overrideBaseNameWithExtensionAtPosition(char * position, const char * baseName, const char * extension) {
   size_t result = strlcpy(position, baseName, strlen(baseName)+1); // strlcpy copies the null terminating char
+  assert(UTF8Decoder::CharSizeOfCodePoint(k_dotChar) == 1);
   *(position+result) = k_dotChar; // Replace the null terminating char with a dot
   result++;
   result += strlcpy(position+result, extension, strlen(extension)+1);
@@ -417,11 +418,11 @@ bool Storage::isNameOfRecordTaken(Record r, const Record * recordToExclude) {
 
 bool Storage::FullNameCompliant(const char * fullName) {
   // We check that there is one dot and one dot only.
-  const char * dotChar = strchr(fullName, k_dotChar);
-  if (dotChar == nullptr) {
+  const char * dotChar = UTF8Helper::CodePointSearch(fullName, k_dotChar);
+  if (*dotChar == 0) {
     return false;
   }
-  if (strchr(dotChar+1, k_dotChar) == nullptr) {
+  if (UTF8Helper::CodePointSearch(dotChar+1, k_dotChar) == 0) {
     return true;
   }
   return false;
@@ -434,7 +435,7 @@ bool Storage::FullNameHasExtension(const char * fullName, const char * extension
   size_t fullNameLength = strlen(fullName);
   if (fullNameLength > extensionLength) {
     const char * ext = fullName + fullNameLength - extensionLength;
-    if (*(ext-1) == k_dotChar && strcmp(ext, extension) == 0) {
+    if (UTF8Helper::PreviousCodePointIs(fullName, ext, k_dotChar) && strcmp(ext, extension) == 0) {
       return true;
     }
   }
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 9bc689032..42390bbf9 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -6,6 +6,7 @@
 namespace UTF8Helper {
 
 static inline int minInt(int x, int y) { return x < y ? x : y; }
+static inline size_t minSizeT(size_t x, size_t y) { return x < y ? x : y; }
 
 int CountOccurrences(const char * s, CodePoint c) {
   int count = 0;
@@ -78,6 +79,22 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
   }
 }
 
+size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c) {
+  UTF8Decoder decoder(src);
+  const char * codePointPointer = decoder.stringPosition();
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != UCodePointNull && codePoint != c) {
+    codePointPointer = decoder.stringPosition();
+    codePoint = decoder.nextCodePoint();
+  }
+  size_t copySize = minSizeT(dstSize - 1, codePointPointer - src);
+  assert(UTF8Helper::CodePointIs(src + copySize, 0) || UTF8Helper::CodePointIs(src + copySize, c));
+  memmove(dst, src, copySize);
+  assert(copySize < dstSize);
+  dst[copySize] = 0;
+  return copySize;
+}
+
 const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint, bool goingRight, const char * initialPosition) {
   /* If we are decoding towards the left, we must have a starting position. If
    * we are decoding towards the right, the starting position is the start of
diff --git a/poincare/include/poincare/left_parenthesis_layout.h b/poincare/include/poincare/left_parenthesis_layout.h
index ffc0fe6df..8aaa41bde 100644
--- a/poincare/include/poincare/left_parenthesis_layout.h
+++ b/poincare/include/poincare/left_parenthesis_layout.h
@@ -19,7 +19,7 @@ public:
 
   // Serializable Node
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
-    return SerializationHelper::Char(buffer, bufferSize, '(');
+    return SerializationHelper::CodePoint(buffer, bufferSize, '(');
   }
 
   // TreeNode
diff --git a/poincare/include/poincare/left_square_bracket_layout.h b/poincare/include/poincare/left_square_bracket_layout.h
index 00720398a..c4f069c44 100644
--- a/poincare/include/poincare/left_square_bracket_layout.h
+++ b/poincare/include/poincare/left_square_bracket_layout.h
@@ -11,7 +11,7 @@ class LeftSquareBracketLayoutNode final : public SquareBracketLayoutNode {
 public:
   using SquareBracketLayoutNode::SquareBracketLayoutNode;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
-    return SerializationHelper::Char(buffer, bufferSize, '[');
+    return SerializationHelper::CodePoint(buffer, bufferSize, '[');
   }
   bool isLeftBracket() const override { return true; }
 
diff --git a/poincare/include/poincare/right_parenthesis_layout.h b/poincare/include/poincare/right_parenthesis_layout.h
index 2f3f03d9f..4782c5fe3 100644
--- a/poincare/include/poincare/right_parenthesis_layout.h
+++ b/poincare/include/poincare/right_parenthesis_layout.h
@@ -19,7 +19,7 @@ public:
 
   // SerializableNode
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
-    return SerializationHelper::Char(buffer, bufferSize, ')');
+    return SerializationHelper::CodePoint(buffer, bufferSize, ')');
   }
 
   // TreeNode
diff --git a/poincare/include/poincare/right_square_bracket_layout.h b/poincare/include/poincare/right_square_bracket_layout.h
index 161ade869..e37132b85 100644
--- a/poincare/include/poincare/right_square_bracket_layout.h
+++ b/poincare/include/poincare/right_square_bracket_layout.h
@@ -11,7 +11,7 @@ class RightSquareBracketLayoutNode final : public SquareBracketLayoutNode {
 public:
   using SquareBracketLayoutNode::SquareBracketLayoutNode;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
-    return SerializationHelper::Char(buffer, bufferSize, ']');
+    return SerializationHelper::CodePoint(buffer, bufferSize, ']');
   }
   bool isRightBracket() const override { return true; }
 
diff --git a/poincare/include/poincare/sequence_layout.h b/poincare/include/poincare/sequence_layout.h
index 28d2a48d5..9f5608adc 100644
--- a/poincare/include/poincare/sequence_layout.h
+++ b/poincare/include/poincare/sequence_layout.h
@@ -29,7 +29,7 @@ protected:
   constexpr static KDCoordinate k_boundHeightMargin = 2;
   constexpr static KDCoordinate k_argumentWidthMargin = 2;
   constexpr static const KDFont * k_font = KDFont::LargeFont;
-  constexpr static char k_equal[] = {'=', 0};
+  constexpr static const char * k_equal = "=";
 
   KDSize lowerBoundSizeWithVariableEquals();
 
diff --git a/poincare/include/poincare/serialization_helper.h b/poincare/include/poincare/serialization_helper.h
index 10126cce7..84ff6d32c 100644
--- a/poincare/include/poincare/serialization_helper.h
+++ b/poincare/include/poincare/serialization_helper.h
@@ -33,9 +33,7 @@ namespace SerializationHelper {
       const char * operatorName,
       bool writeFirstChild = true);
 
-  // Write one char in a buffer
-  int Char(char * buffer, int bufferSize, char c);
-  // Write one code point in a buffer
+  // Write one code point in a buffer and a null-terminating char
   int CodePoint(char * buffer, int bufferSize, CodePoint c);
 };
 
diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index e7715e65e..f608cb053 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -48,6 +48,7 @@ private:
 
   size_t nodeSize() const override { return sizeof(SymbolNode); }
   template<typename T> Evaluation<T> templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
+  bool isUnknownX() const;
 };
 
 class Symbol final : public SymbolAbstract {
@@ -57,7 +58,7 @@ class Symbol final : public SymbolAbstract {
 public:
   static constexpr int k_ansLength = 3;
   static constexpr char k_ans[k_ansLength+1] = "ans";
-  static constexpr char k_unknownXReadableChar = 'x';
+  static constexpr CodePoint k_unknownXReadableChar = 'x';
   enum SpecialSymbols : char {
     /* We can use characters from 1 to 31 as they do not correspond to usual
      * characters but events as 'end of text', 'backspace'... */
diff --git a/poincare/src/bracket_pair_layout.cpp b/poincare/src/bracket_pair_layout.cpp
index 345a9cf89..a7d751e1a 100644
--- a/poincare/src/bracket_pair_layout.cpp
+++ b/poincare/src/bracket_pair_layout.cpp
@@ -1,6 +1,7 @@
 #include <poincare/bracket_pair_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
 extern "C" {
 #include <assert.h>
 #include <stdlib.h>
@@ -96,7 +97,7 @@ int BracketPairLayoutNode::serialize(char * buffer, int bufferSize, Preferences:
 
   // Write the opening bracket
   int numberOfChar = 0;
-  buffer[numberOfChar++] = '[';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '[');
   if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
 
   // Write the argument
@@ -104,7 +105,8 @@ int BracketPairLayoutNode::serialize(char * buffer, int bufferSize, Preferences:
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
   // Write the closing bracket
-  buffer[numberOfChar++] = ']';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ']');
+  if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index ba192e739..62dcab336 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -6,8 +6,9 @@
 #include <poincare/layout_helper.h>
 #include <poincare/serialization_helper.h>
 #include <poincare/ieee754.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 #include <assert.h>
-#include <ion.h>
 #include <cmath>
 #include <assert.h>
 
@@ -111,8 +112,7 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
   int currentChar = 0;
   if (currentChar >= bufferSize-1) { return bufferSize-1; }
   if (unsignedMantissa().isZero()) {
-    buffer[currentChar++] = '0';
-    buffer[currentChar] = 0;
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '0'); // This already writes the null terminating char
     return currentChar;
   }
   int exponent = m_exponent;
@@ -136,14 +136,14 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
     removeZeroAtTheEnd(&m);
   }
   if (m_negative) {
-    buffer[currentChar++] = '-';
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '-');
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
   }
   int mantissaLength = m.serialize(tempBuffer, PrintFloat::k_numberOfStoredSignificantDigits+1);
 
   // Assert that m is not +/-inf
   assert(strcmp(tempBuffer, Infinity::Name()) != 0);
-  assert(!(tempBuffer[0] == '-' && strcmp(&tempBuffer[1], Infinity::Name()) == 0));
+  assert(!(UTF8Helper::CodePointIs(tempBuffer, '-') && strcmp(&tempBuffer[1], Infinity::Name()) == 0));
 
   if (strcmp(tempBuffer, Undefined::Name()) == 0) {
     currentChar += strlcpy(buffer+currentChar, tempBuffer, bufferSize-currentChar);
@@ -168,10 +168,20 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
     if (mantissaLength == 1) {
       currentChar += strlcpy(buffer+currentChar, tempBuffer, bufferSize-currentChar);
     } else {
+      /* Forward one char: _
+       * Write the mantissa _23456
+       * Copy the most significant digit on the forwarded char: 223456
+       * Write the dot : 2.3456
+       *
+       * We should use the UTF8Helper to manipulate chars, but it is clearer to
+       * manipulate chars directly, so we just put assumptions on the char size
+       * of the code points we manipuate. */
+      assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
       currentChar++;
-      int decimalMarkerPosition = currentChar;
       if (currentChar >= bufferSize-1) { return bufferSize-1; }
+      int decimalMarkerPosition = currentChar;
       currentChar += strlcpy(buffer+currentChar, tempBuffer, bufferSize-currentChar);
+      assert(UTF8Decoder::CharSizeOfCodePoint(buffer[decimalMarkerPosition]) == 1);
       buffer[decimalMarkerPosition-1] = buffer[decimalMarkerPosition];
       buffer[decimalMarkerPosition] = '.';
     }
@@ -189,12 +199,8 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
   strlcpy(buffer+currentChar+deltaCharMantissa, tempBuffer, maxInt(0, bufferSize-deltaCharMantissa-currentChar));
   if (exponent < 0) {
     for (int i = 0; i <= -exponent; i++) {
+      currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, i == 1 ? '.' : '0');
       if (currentChar >= bufferSize-1) { return bufferSize-1; }
-      if (i == 1) {
-        buffer[currentChar++] = '.';
-        continue;
-      }
-      buffer[currentChar++] = '0';
     }
   }
   currentChar += mantissaLength;
@@ -205,17 +211,18 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
       buffer[i+1] = buffer[i];
     }
     if (currentChar >= bufferSize-1) { return bufferSize-1; }
+    assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
     buffer[decimalMarkerPosition+1] = '.';
     currentChar++;
   }
+  if (currentChar+1 >= bufferSize-1) { return bufferSize-1; }
   if (exponent >= 0 && exponent > mantissaLength-1) {
     int endMarkerPosition = m_negative ? exponent+1 : exponent;
     for (int i = currentChar-1; i < endMarkerPosition; i++) {
+      currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '0');
       if (currentChar+1 >= bufferSize-1) { return bufferSize-1; }
-      buffer[currentChar++] = '0';
     }
   }
-  if (currentChar >= bufferSize-1) { return bufferSize-1; }
   buffer[currentChar] = 0;
   return currentChar;
 }
@@ -228,7 +235,7 @@ template<typename T> T DecimalNode::templatedApproximate() const {
 }
 
 int Decimal::Exponent(const char * integralPart, int integralPartLength, const char * fractionalPart, int fractionalPartLength, const char * exponent, int exponentLength, bool exponentNegative) {
-  if (exponentLength > 0 && exponent[0] == '-') {
+  if (exponentLength > 0 && UTF8Helper::CodePointIs(exponent, '-')) {
     exponent++;
     exponentNegative = true;
     exponentLength--;
@@ -237,6 +244,7 @@ int Decimal::Exponent(const char * integralPart, int integralPartLength, const c
   int exp = 0;
   for (int i = 0; i < exponentLength; i++) {
     exp *= base;
+    assert(*exponent >= '0' && *exponent <= '9');
     exp += *exponent-'0';
     exponent++;
   }
@@ -253,7 +261,7 @@ int Decimal::Exponent(const char * integralPart, int integralPartLength, const c
   if (integralPart == integralPartEnd) {
     const char * fractionalPartEnd = fractionalPart + fractionalPartLength;
     if (fractionalPart != nullptr) {
-      while (*fractionalPart == '0' && fractionalPart < fractionalPartEnd) {
+      while (UTF8Helper::CodePointIs(fractionalPart, '0') && fractionalPart < fractionalPartEnd) {
         fractionalPart++;
         exp--;
       }
@@ -271,7 +279,7 @@ Decimal Decimal::Builder(const char * integralPart, int integralPartLength, cons
   Integer zero(0);
   Integer base(10);
   // Get rid of useless preceeding 0s
-  while (*integralPart == '0' && integralPartLength > 1) {
+  while (UTF8Helper::CodePointIs(integralPart, '0') && integralPartLength > 1) {
     integralPart++;
     integralPartLength--;
   }
@@ -282,9 +290,9 @@ Decimal Decimal::Builder(const char * integralPart, int integralPartLength, cons
   Integer numerator(integralPart, integralPartLength, false);
   assert(!numerator.isOverflow());
   // Special case for 0.??? : get rid of useless 0s in front of the integralPartLength
-  if (fractionalPart != nullptr && integralPartLength == 1 && integralPart[0] == '0') {
+  if (fractionalPart != nullptr && integralPartLength == 1 && UTF8Helper::CodePointIs(integralPart, '0')) {
     integralPartLength = 0;
-    while (*fractionalPart == '0') {
+    while (UTF8Helper::CodePointIs(fractionalPart, '0')) {
       fractionalPart++;
       fractionalPartLength--;
     }
@@ -293,6 +301,7 @@ Decimal Decimal::Builder(const char * integralPart, int integralPartLength, cons
   fractionalPartLength = integralPartLength+fractionalPartLength > PrintFloat::k_numberOfStoredSignificantDigits ? PrintFloat::k_numberOfStoredSignificantDigits - integralPartLength : fractionalPartLength;
   for (int i = 0; i < fractionalPartLength; i++) {
     numerator = Integer::Multiplication(numerator, base);
+    assert(*fractionalPart >= '0' && *fractionalPart <= '9');
     numerator = Integer::Addition(numerator, Integer(*fractionalPart-'0'));
     fractionalPart++;
   }
diff --git a/poincare/src/factorial.cpp b/poincare/src/factorial.cpp
index 9c777a44a..ff04ca490 100644
--- a/poincare/src/factorial.cpp
+++ b/poincare/src/factorial.cpp
@@ -1,13 +1,13 @@
 #include <poincare/factorial.h>
-#include <poincare/constant.h>
 #include <poincare/code_point_layout.h>
+#include <poincare/constant.h>
 #include <poincare/horizontal_layout.h>
-#include <poincare/rational.h>
-#include <poincare/undefined.h>
-#include <poincare/symbol.h>
-#include <poincare/simplification_helper.h>
 #include <poincare/parenthesis.h>
-#include <ion.h>
+#include <poincare/rational.h>
+#include <poincare/serialization_helper.h>
+#include <poincare/simplification_helper.h>
+#include <poincare/symbol.h>
+#include <poincare/undefined.h>
 #include <cmath>
 
 namespace Poincare {
@@ -73,18 +73,18 @@ int FactorialNode::serialize(char * buffer, int bufferSize, Preferences::PrintFl
   buffer[bufferSize-1] = 0;
   int numberOfChar = 0;
   if (childNeedsParenthesis(childAtIndex(0))) {
-    buffer[numberOfChar++] = '(';
+    numberOfChar += SerializationHelper::CodePoint(&buffer[numberOfChar], bufferSize-numberOfChar, '(');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   }
   numberOfChar += childAtIndex(0)->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
   if (childNeedsParenthesis(childAtIndex(0))) {
-    buffer[numberOfChar++] = ')';
+    numberOfChar += SerializationHelper::CodePoint(&buffer[numberOfChar], bufferSize-numberOfChar, ')');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   }
   if (numberOfChar >= bufferSize-1) {
     return numberOfChar;
   }
-  buffer[numberOfChar++] = '!';
+  numberOfChar += SerializationHelper::CodePoint(&buffer[numberOfChar], bufferSize-numberOfChar, '!');
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 9128e9ccb..30d4b2a78 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -142,7 +142,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->isHorizontal() && p->childAtIndex(idxInParent + 1)->isVerticalOffset()) {
     addParenthesis = true;
     // Add parenthesis
-    buffer[numberOfChar++] = '(';
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
@@ -152,7 +152,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 
   if (addParenthesis) {
     // Add parenthesis
-    buffer[numberOfChar++] = ')';
+    numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ')');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
diff --git a/poincare/src/integer.cpp b/poincare/src/integer.cpp
index da7320d06..2c38ce69c 100644
--- a/poincare/src/integer.cpp
+++ b/poincare/src/integer.cpp
@@ -1,6 +1,8 @@
 #include <poincare/integer.h>
 #include <poincare/ieee754.h>
 #include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
+#include <ion/unicode/utf8_helper.h>
 #include <cmath>
 #include <utility>
 extern "C" {
@@ -135,7 +137,7 @@ Integer::Integer(double_native_int_t i) {
 Integer::Integer(const char * digits, size_t length, bool negative) :
   Integer(0)
 {
-  if (digits != nullptr && digits[0] == '-') {
+  if (digits != nullptr && UTF8Helper::CodePointIs(digits, '-')) {
     negative = true;
     digits++;
     length--;
@@ -144,7 +146,7 @@ Integer::Integer(const char * digits, size_t length, bool negative) :
     Integer base(10);
     for (size_t i = 0; i < length; i++) {
       *this = Multiplication(*this, base);
-      *this = Addition(*this, Integer(*digits-'0'));
+      *this = Addition(*this, Integer(*digits - '0'));
       digits++;
     }
   }
@@ -158,6 +160,9 @@ int Integer::serialize(char * buffer, int bufferSize) const {
     return -1;
   }
   buffer[bufferSize-1] = 0;
+  if (bufferSize == 1) {
+    return 0;
+  }
   if (isOverflow()) {
     return PrintFloat::convertFloatToText<float>(m_negative ? -INFINITY : INFINITY, buffer, bufferSize, PrintFloat::k_numberOfStoredSignificantDigits, Preferences::PrintFloatMode::Decimal);
   }
@@ -166,14 +171,12 @@ int Integer::serialize(char * buffer, int bufferSize) const {
   Integer abs = *this;
   abs.setNegative(false);
   IntegerDivision d = udiv(abs, base);
+
   int size = 0;
-  if (bufferSize == 1) {
-    return 0;
-  }
   if (isZero()) {
-    buffer[size++] = '0';
+    size += SerializationHelper::CodePoint(buffer + size, bufferSize - size, '0');
   } else if (isNegative()) {
-    buffer[size++] = '-';
+    size += SerializationHelper::CodePoint(buffer + size, bufferSize - size, '-');
   }
 
   while (!(d.remainder.isZero() &&
@@ -182,9 +185,10 @@ int Integer::serialize(char * buffer, int bufferSize) const {
     if (size >= bufferSize-1) {
       return PrintFloat::convertFloatToText<float>(NAN, buffer, bufferSize, PrintFloat::k_numberOfStoredSignificantDigits, Preferences::PrintFloatMode::Decimal);
     }
-    buffer[size++] = c;
+    size += SerializationHelper::CodePoint(buffer + size, bufferSize - size, c);
     d = udiv(d.quotient, base);
   }
+  assert(size <= bufferSize - 1);
   buffer[size] = 0;
 
   // Flip the string
diff --git a/poincare/src/integral_layout.cpp b/poincare/src/integral_layout.cpp
index 9af734d8d..d6962dcc8 100644
--- a/poincare/src/integral_layout.cpp
+++ b/poincare/src/integral_layout.cpp
@@ -160,7 +160,7 @@ int IntegralLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   }
 
   // Write the opening parenthesis
-  buffer[numberOfChar++] = '(';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
   if (numberOfChar >= bufferSize-1) {
     return bufferSize-1;
   }
@@ -170,6 +170,7 @@ int IntegralLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
     if (i != 0) {
       // Write the comma
       buffer[numberOfChar++] = ',';
+      numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
       if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
     }
 
@@ -179,7 +180,7 @@ int IntegralLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   }
 
   // Write the closing parenthesis
-  buffer[numberOfChar++] = ')';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ')');
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/matrix.cpp b/poincare/src/matrix.cpp
index f2faeef90..9ec4b0953 100644
--- a/poincare/src/matrix.cpp
+++ b/poincare/src/matrix.cpp
@@ -1,9 +1,10 @@
 #include <poincare/matrix.h>
-#include <poincare/rational.h>
 #include <poincare/division.h>
-#include <poincare/subtraction.h>
 #include <poincare/matrix_complex.h>
 #include <poincare/matrix_layout.h>
+#include <poincare/rational.h>
+#include <poincare/serialization_helper.h>
+#include <poincare/subtraction.h>
 #include <cmath>
 #include <float.h>
 #include <string.h>
@@ -40,12 +41,12 @@ int MatrixNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
   if (currentChar >= bufferSize-1) {
     return 0;
   }
-  buffer[currentChar++] = '[';
+  currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '[');
   if (currentChar >= bufferSize-1) {
     return currentChar;
   }
   for (int i = 0; i < m_numberOfRows; i++) {
-    buffer[currentChar++] = '[';
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '[');
     if (currentChar >= bufferSize-1) {
       return currentChar;
     }
@@ -54,7 +55,7 @@ int MatrixNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
       return currentChar;
     }
     for (int j = 1; j < m_numberOfColumns; j++) {
-      buffer[currentChar++] = ',';
+      currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, ',');
       if (currentChar >= bufferSize-1) {
         return currentChar;
       }
@@ -67,12 +68,15 @@ int MatrixNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
     if (currentChar >= bufferSize-1) {
       return currentChar;
     }
-    buffer[currentChar++] = ']';
+    currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, ']');
     if (currentChar >= bufferSize-1) {
       return currentChar;
     }
   }
-  buffer[currentChar++] = ']';
+  currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, ']');
+  if (currentChar >= bufferSize-1) {
+    return currentChar;
+  }
   buffer[currentChar] = 0;
   return currentChar;
 }
diff --git a/poincare/src/matrix_layout.cpp b/poincare/src/matrix_layout.cpp
index e7223c3e7..a5d565c6a 100644
--- a/poincare/src/matrix_layout.cpp
+++ b/poincare/src/matrix_layout.cpp
@@ -101,22 +101,23 @@ int MatrixLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Prin
     return 1;
   }
   int numberOfChar = 0;
-  buffer[numberOfChar++] = '[';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '[');
   if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
 
   int maxRowIndex = hasGreySquares() ? m_numberOfRows - 1 : m_numberOfRows;
   int maxColumnIndex = hasGreySquares() ? m_numberOfColumns - 2 :  m_numberOfColumns - 1;
   for (int i = 0; i < maxRowIndex; i++) {
-    buffer[numberOfChar++] = '[';
+    numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '[');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
 
     numberOfChar += SerializationHelper::Infix(this, buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits, ",", i*m_numberOfColumns, i* m_numberOfColumns + maxColumnIndex);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
-    buffer[numberOfChar++] = ']';
+    numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ']');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   }
-  buffer[numberOfChar++] = ']';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ']');
+  if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index 875186161..c689064d0 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -173,7 +173,7 @@ int NthRootLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pri
     return bufferSize-1;
   }
 
-  buffer[numberOfChar++] = '(';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
   if (numberOfChar >= bufferSize-1) {
     return bufferSize-1;
   }
@@ -181,7 +181,7 @@ int NthRootLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pri
   numberOfChar += (const_cast<NthRootLayoutNode *>(this))->radicandLayout()->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
-  buffer[numberOfChar++] = ')';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ')');
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/opposite.cpp b/poincare/src/opposite.cpp
index 071f7b8c8..acc25f9fe 100644
--- a/poincare/src/opposite.cpp
+++ b/poincare/src/opposite.cpp
@@ -3,12 +3,13 @@
 #include <poincare/code_point_layout.h>
 #include <poincare/constant.h>
 #include <poincare/horizontal_layout.h>
-#include <cmath>
 #include <poincare/layout_helper.h>
 #include <poincare/multiplication.h>
 #include <poincare/rational.h>
+#include <poincare/serialization_helper.h>
 #include <poincare/simplification_helper.h>
 extern "C" {
+#include <cmath>
 #include <assert.h>
 #include <stdlib.h>
 }
@@ -57,7 +58,10 @@ int OppositeNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   buffer[bufferSize-1] = 0;
   int numberOfChar = 0;
   if (bufferSize == 1) { return 0; }
-  buffer[numberOfChar++] = '-';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '-');
+  if (numberOfChar >= bufferSize - 1) {
+    return bufferSize - 1;
+  }
   numberOfChar += childAtIndex(0)->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
   buffer[numberOfChar] = 0;
   return numberOfChar;
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 26bd6d7bd..878e442ec 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -1,6 +1,7 @@
 #include "tokenizer.h"
 #include <poincare/number.h>
 #include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 
 namespace Poincare {
 
@@ -79,7 +80,7 @@ Token Tokenizer::popNumber() {
   const char * fractionalPartText = m_text;
   size_t fractionalPartLength = 0;
 
-  assert(integralPartLength > 0 || *m_text == '.');
+  assert(integralPartLength > 0 || UTF8Helper::CodePointIs(m_text, '.'));
   if (canPopCodePoint('.')) {
     fractionalPartText = m_text;
     fractionalPartLength = popDigits();
diff --git a/poincare/src/print_float.cpp b/poincare/src/print_float.cpp
index cce3d89e7..89a27c61b 100644
--- a/poincare/src/print_float.cpp
+++ b/poincare/src/print_float.cpp
@@ -5,6 +5,8 @@
 #include <poincare/preferences.h>
 #include <poincare/serialization_helper.h>
 #include <poincare/undefined.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 extern "C" {
 #include <assert.h>
 #include <stdlib.h>
@@ -24,19 +26,26 @@ void PrintFloat::printBase10IntegerWithDecimalMarker(char * buffer, int bufferLe
   constexpr int tempBufferSize = PrintFloat::k_maxFloatBufferLength;
   char tempBuffer[tempBufferSize];
   int intLength = i.serialize(tempBuffer, tempBufferSize);
-  int firstDigitChar = tempBuffer[0] == '-' ? 1 : 0;
+  int firstDigitChar = UTF8Helper::CodePointIs(tempBuffer, '-') ? 1 : 0;
+  /* We should use the UTF8Decoder to write code points in buffers, but it is
+   * much clearer to manipulate chars directly as we know that the code point we
+   * use ('.', '0, '1', '2', ...) are only one char long. */
   for (int k = bufferLength-1; k >= firstDigitChar; k--) {
     if (k == decimalMarkerPosition) {
+      assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
       buffer[k] = '.';
       continue;
     }
     if (intLength > firstDigitChar) {
+      assert(UTF8Decoder::CharSizeOfCodePoint(tempBuffer[intLength-1]) == 1);
       buffer[k] = tempBuffer[--intLength];
       continue;
     }
+    assert(UTF8Decoder::CharSizeOfCodePoint('0') == 1);
     buffer[k] = '0';
   }
   if (firstDigitChar == 1) {
+    assert(UTF8Decoder::CharSizeOfCodePoint(tempBuffer[0]) == 1);
     buffer[0] = tempBuffer[0];
   }
 }
@@ -82,7 +91,7 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
     assert(Infinity::NameSize()+1 < bufferSize);
     int currentChar = 0;
     if (f < 0) {
-      buffer[currentChar++] = '-';
+      currentChar+= SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, '-');
     }
     strlcpy(&buffer[currentChar], Infinity::Name(), bufferSize-1);
     return currentChar + Infinity::NameSize() - 1;
@@ -149,6 +158,7 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
   int numberOfZerosRemoved = 0;
   while (digit.isZero() && numberOfCharsForMantissaWithoutSign > minimumNumberOfCharsInMantissa &&
       (numberOfCharsForMantissaWithoutSign > exponentInBase10+1 || mode == Preferences::PrintFloatMode::Scientific)) {
+    assert(UTF8Decoder::CharSizeOfCodePoint('0') == 1);
     numberOfCharsForMantissaWithoutSign--;
     dividend = quotient;
     quotient = Integer::Division(dividend, Integer(10)).quotient;
@@ -164,12 +174,14 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
   // Force a decimal marker if there is fractional part
   bool decimalMarker = (mode == Preferences::PrintFloatMode::Scientific && numberOfCharsForMantissaWithoutSign > 1) || (mode == Preferences::PrintFloatMode::Decimal && numberOfCharsForMantissaWithoutSign > exponentInBase10 +1);
   if (decimalMarker) {
+    assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
     numberOfCharsForMantissaWithoutSign++;
   }
 
   /* Find the position of the decimal marker position */
   int decimalMarkerPosition = exponentInBase10 < 0 || mode == Preferences::PrintFloatMode::Scientific ? 1 : exponentInBase10+1;
   decimalMarkerPosition = f < 0 ? decimalMarkerPosition+1 : decimalMarkerPosition;
+  assert(UTF8Decoder::CharSizeOfCodePoint('-') == 1);
 
   /* Part III: Exponent */
 
@@ -177,10 +189,12 @@ int PrintFloat::convertFloatToTextPrivate(T f, char * buffer, int bufferSize, in
   if (exponentInBase10 < 0){
     // If the exponent is < 0, we need a additional char for the sign
     numberOfCharExponent++;
+    assert(UTF8Decoder::CharSizeOfCodePoint('-') == 1);
   }
 
   /* Part III: print mantissa*10^exponent */
   int numberOfCharsForMantissaWithSign = f >= 0 ? numberOfCharsForMantissaWithoutSign : numberOfCharsForMantissaWithoutSign + 1;
+  assert(UTF8Decoder::CharSizeOfCodePoint('-') == 1);
   // Print mantissa
   assert(!dividend.isOverflow());
   if (numberOfCharsForMantissaWithSign >= bufferSize) {
diff --git a/poincare/src/rational.cpp b/poincare/src/rational.cpp
index 3379dec01..e5e9ee87a 100644
--- a/poincare/src/rational.cpp
+++ b/poincare/src/rational.cpp
@@ -1,16 +1,16 @@
 #include <poincare/rational.h>
+#include <poincare/arithmetic.h>
+#include <poincare/code_point_layout.h>
+#include <poincare/fraction_layout.h>
+#include <poincare/infinity.h>
+#include <poincare/opposite.h>
+#include <poincare/serialization_helper.h>
 extern "C" {
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
 #include <math.h>
 }
-#include <poincare/arithmetic.h>
-#include <poincare/opposite.h>
-#include <poincare/infinity.h>
-#include <poincare/fraction_layout.h>
-#include <poincare/code_point_layout.h>
-
 namespace Poincare {
 
 /* Rational Node */
@@ -78,7 +78,10 @@ int RationalNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   if (numberOfChar >= bufferSize-1) {
     return numberOfChar;
   }
-  buffer[numberOfChar++] = '/';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '/');
+  if (numberOfChar >= bufferSize-1) {
+    return numberOfChar;
+  }
   numberOfChar += denominator().serialize(buffer+numberOfChar, bufferSize-numberOfChar);
   return numberOfChar;
 }
diff --git a/poincare/src/sequence_layout.cpp b/poincare/src/sequence_layout.cpp
index 7e98ecfa9..ba4ac205c 100644
--- a/poincare/src/sequence_layout.cpp
+++ b/poincare/src/sequence_layout.cpp
@@ -9,8 +9,6 @@ namespace Poincare {
 
 static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { return x > y ? x : y; }
 
-constexpr char SequenceLayoutNode::k_equal[];
-
 void SequenceLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == upperBoundLayout())
   {
@@ -215,14 +213,14 @@ int SequenceLayoutNode::writeDerivedClassInBuffer(const char * operatorName, cha
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
   // Write the opening parenthesis
-  buffer[numberOfChar++] = '(';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
   if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
     LayoutNode * argLayouts[] = {const_cast<SequenceLayoutNode *>(this)->argumentLayout(), const_cast<SequenceLayoutNode *>(this)->variableLayout(), const_cast<SequenceLayoutNode *>(this)->lowerBoundLayout(), const_cast<SequenceLayoutNode *>(this)->upperBoundLayout()};
   for (uint8_t i = 0; i < sizeof(argLayouts)/sizeof(argLayouts[0]); i++) {
     if (i != 0) {
       // Write the comma
-      buffer[numberOfChar++] = ',';
+      numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ',');
       if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
     }
     numberOfChar += argLayouts[i]->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
@@ -230,7 +228,7 @@ int SequenceLayoutNode::writeDerivedClassInBuffer(const char * operatorName, cha
   }
 
   // Write the closing parenthesis
-  buffer[numberOfChar++] = ')';
+  numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ')');
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 0851bd782..770acec6b 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -5,8 +5,6 @@
 
 namespace Poincare {
 
-static inline int minInt(int x, int y) { return x < y ? x : y; }
-
 static bool checkBufferSize(char * buffer, int bufferSize, int * result) {
   // If buffer has size 0 or 1, put a zero if it fits and return
   if (bufferSize == 0) {
@@ -41,7 +39,7 @@ static int serializeChild(
   // Write the child with parentheses if needed
   bool addParentheses = parentNode->childNeedsParenthesis(childNode);
   if (addParentheses) {
-    buffer[numberOfChar++] = '(';
+    numberOfChar += UTF8Decoder::CodePointToChars('(', buffer+numberOfChar, bufferSize - numberOfChar);
     if (numberOfChar >= bufferSize-1) {
       return bufferSize-1;
     }
@@ -52,7 +50,11 @@ static int serializeChild(
     return bufferSize-1;
   }
   if (addParentheses) {
-    buffer[numberOfChar++] = ')';
+    numberOfChar += UTF8Decoder::CodePointToChars(')', buffer+numberOfChar, bufferSize - numberOfChar);
+  }
+  if (numberOfChar >= bufferSize-1) {
+    assert(buffer[bufferSize - 1] == 0);
+    return bufferSize-1;
   }
   buffer[numberOfChar] = 0;
   return numberOfChar;
@@ -132,7 +134,7 @@ int SerializationHelper::Prefix(
   }
 
   // Add the opening parenthese
-  buffer[numberOfChar++] = '(';
+  numberOfChar += UTF8Decoder::CodePointToChars('(', buffer+numberOfChar, bufferSize - numberOfChar);
   if (numberOfChar >= bufferSize-1) {
     return bufferSize-1;
   }
@@ -153,7 +155,7 @@ int SerializationHelper::Prefix(
 
     // Write the remaining children, separated with commas
     for (int i = firstChildIndex + 1; i < childrenCount; i++) {
-      buffer[numberOfChar++] = ',';
+      numberOfChar += UTF8Decoder::CodePointToChars(',', buffer+numberOfChar, bufferSize - numberOfChar);
       if (numberOfChar >= bufferSize-1) {
         return bufferSize-1;
       }
@@ -166,23 +168,14 @@ int SerializationHelper::Prefix(
   }
 
   // Add the closing parenthese
-  buffer[numberOfChar++] = ')';
+  numberOfChar += UTF8Decoder::CodePointToChars(')', buffer+numberOfChar, bufferSize - numberOfChar);
+  if (numberOfChar >= bufferSize-1) {
+    return bufferSize-1;
+  }
   buffer[numberOfChar] = 0;
   return numberOfChar;
 }
 
-int SerializationHelper::Char(char * buffer, int bufferSize, char c) {
-  {
-    int result = 0;
-    if (checkBufferSize(buffer, bufferSize, &result)) {
-      return result;
-    }
-  }
-  buffer[0] = c;
-  buffer[1] = 0;
-  return 1;
-}
-
 int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoint c) {
   {
     int result = 0;
@@ -191,9 +184,9 @@ int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoin
     }
   }
   size_t size = UTF8Decoder::CodePointToChars(c, buffer, bufferSize);
-  int nullTerminatingIndex = minInt(size, bufferSize - 1);
-  buffer[nullTerminatingIndex] = 0;
-  return nullTerminatingIndex;
+  assert(size <= bufferSize - 1);
+  buffer[size] = 0;
+  return size;
 }
 
 }
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index de844615a..52ef984ea 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -7,13 +7,14 @@
 #include <poincare/rational.h>
 #include <poincare/undefined.h>
 #include <poincare/vertical_offset_layout.h>
-#include <ion.h>
+#include <ion/unicode/utf8_helper.h>
 #include <cmath>
 #include <assert.h>
 
 namespace Poincare {
 
 constexpr char Symbol::k_ans[];
+constexpr CodePoint Symbol::k_unknownXReadableChar;
 
 SymbolNode::SymbolNode(const char * newName, int length) : SymbolAbstractNode() {
   strlcpy(const_cast<char*>(name()), newName, length+1);
@@ -28,7 +29,7 @@ Expression SymbolNode::replaceUnknown(const Symbol & symbol) {
 }
 
 int SymbolNode::polynomialDegree(Context & context, const char * symbolName) const {
-  if (strcmp(m_name,symbolName) == 0) {
+  if (strcmp(m_name, symbolName) == 0) {
     return 1;
   }
   return 0;
@@ -66,11 +67,7 @@ int SymbolNode::getVariables(Context & context, isVariableTest isVariable, char
 }
 
 float SymbolNode::characteristicXRange(Context & context, Preferences::AngleUnit angleUnit) const {
-  if (m_name[0] == Symbol::SpecialSymbols::UnknownX) {
-    assert(m_name[1] == 0);
-    return NAN;
-  }
-  return 0.0f;
+  return isUnknownX() ? NAN : 0.0f;
 }
 
 bool SymbolNode::isReal(Context & context) const {
@@ -79,10 +76,10 @@ bool SymbolNode::isReal(Context & context) const {
 }
 
 Layout SymbolNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  if (m_name[0] == Symbol::SpecialSymbols::UnknownX) {
-    assert(m_name[1] == 0);
+  if (isUnknownX()) {
     return CodePointLayout::Builder(Symbol::k_unknownXReadableChar);
   }
+  // TODO return Parse(m_name).createLayout() ?
   if (strcmp(m_name, "u(n)") == 0) {
     return HorizontalLayout::Builder(
         CodePointLayout::Builder('u'),
@@ -148,6 +145,14 @@ Expression Symbol::UntypedBuilder(const char * name, size_t length, Context * co
   return Expression();
 }
 
+bool SymbolNode::isUnknownX() const {
+  bool result = UTF8Helper::CodePointIs(m_name, Symbol::SpecialSymbols::UnknownX);
+  if (result) {
+    assert(m_name[1] == 0);
+  }
+  return result;
+}
+
 bool Symbol::isSeriesSymbol(const char * c) {
   // [NV][1-3]
   if (c[2] == 0 && (c[0] == 'N' || c[0] == 'V') && c[1] >= '1' && c[1] <= '3') {
diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index 9e9a518ad..5ac3f5546 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -6,6 +6,8 @@
 #include <poincare/symbol.h>
 #include <poincare/expression.h>
 #include <poincare/helpers.h>
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
 #include <string.h>
 
 namespace Poincare {
@@ -46,13 +48,7 @@ T SymbolAbstract::Builder(const char * name, int length) {
 }
 
 size_t SymbolAbstract::TruncateExtension(char * dst, const char * src, size_t len) {
-  const char * cur = src;
-  const char * end = src+len-1;
-  while (*cur != '.' && cur < end) {
-    *dst++ = *cur++;
-  }
-  *dst = 0;
-  return cur-src;
+  return UTF8Helper::CopyUntilCodePoint(dst, len, src, '.');
 }
 
 bool SymbolAbstract::matches(const SymbolAbstract & symbol, ExpressionTest test, Context & context) {
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index efc4d4e50..627e15af7 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -158,16 +158,16 @@ int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferenc
       return 0;
     }
     // If the layout is a subscript, write "_{indice}"
-    int numberOfChar = SerializationHelper::Char(buffer, bufferSize, '_');
+    int numberOfChar = SerializationHelper::CodePoint(buffer, bufferSize, '_');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
-    numberOfChar += SerializationHelper::Char(buffer+numberOfChar, bufferSize-numberOfChar, '{');
+    numberOfChar += SerializationHelper::CodePoint(buffer+numberOfChar, bufferSize-numberOfChar, '{');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
     numberOfChar += const_cast<VerticalOffsetLayoutNode *>(this)->indiceLayout()->serialize(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfSignificantDigits);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
-    numberOfChar += SerializationHelper::Char(buffer+numberOfChar, bufferSize-numberOfChar, '}');
+    numberOfChar += SerializationHelper::CodePoint(buffer+numberOfChar, bufferSize-numberOfChar, '}');
     if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
 
     return numberOfChar;

From 94b4cbc8d5784c1b09b1521004e5a5a6133b5def Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 24 Jan 2019 17:24:51 +0100
Subject: [PATCH 055/295] [unicode] Fix python area

---
 escher/src/text_area.cpp               | 17 ++++++++---------
 ion/include/ion/unicode/utf8_helper.h  |  2 +-
 ion/src/shared/unicode/utf8_helper.cpp | 16 ++++++++--------
 3 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 694f26be5..3f5e7b8e1 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -117,10 +117,10 @@ bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * l
   // Insert the indentation
   UTF8Helper::PerformAtCodePoints(
       textBuffer, '\n',
-      [](char * codePointLocation, void * text, int indentation) {
-        ((Text *)text)->insertSpacesAtLocation(indentation, codePointLocation);
+      [](int codePointOffset, void * text, int indentation) {
+        ((Text *)text)->insertSpacesAtLocation(indentation, const_cast<char *>(((Text *)text)->text() + codePointOffset + UTF8Decoder::CharSizeOfCodePoint('\n')));
       },
-      [](char * c1, void * c2, int c3) { },
+      [](int c1, void * c2, int c3) { },
       (void *)(contentView()->getText()),
       indentation);
   return true;
@@ -132,11 +132,11 @@ int TextArea::indentationBeforeCursor() const {
    * indentation size when encountering spaces, reset it to 0 when encountering
    * another code point, until reaching the beginning of the line. */
   UTF8Helper::PerformAtCodePoints(const_cast<TextArea *>(this)->contentView()->text(), ' ',
-      [](char * codePointLocation, void * indentationSize, int context){
+      [](int codePointOffset, void * indentationSize, int context){
         int * castedSize = (int *) indentationSize;
         *castedSize = *castedSize + 1;
       },
-      [](char * codePointLocation, void * indentationSize, int context){
+      [](int codePointOffset, void * indentationSize, int context){
         *((int *) indentationSize) = 0;
       },
       &indentationSize, 0, '\n', false, cursorLocation());
@@ -370,12 +370,11 @@ bool TextArea::TextArea::ContentView::insertTextAtLocation(const char * text, co
   // Scan for \n and 0
   const char * nullLocation = UTF8Helper::PerformAtCodePoints(
       text, '\n',
-      [](char * codePointLocation, void * lineBreak, int indentation) {
+      [](int codePointOffset, void * lineBreak, int indentation) {
         *((bool *)lineBreak) = true;
       },
-      [](char * c1, void * c2, int c3) { },
-      &lineBreak,
-      0);
+      [](int c1, void * c2, int c3) { },
+      &lineBreak, 0);
 
   assert(UTF8Helper::CodePointIs(nullLocation, 0));
   m_text.insertText(text, nullLocation - text, const_cast<char *>(location));
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index ca7123e0f..ad585eb70 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -40,7 +40,7 @@ size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoin
  *    ^start of string        ^initialPosition
  *
  * */
-typedef void (*CodePointAction)(char * codePointLocation, void * contextPointer, int contextInt);
+typedef void (*CodePointAction)(int codePointOffset, void * contextPointer, int contextInt);
 const char *  PerformAtCodePoints(const char * string, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint = UCodePointNull, bool goingRight = true, const char * initialPosition = nullptr);
 
 bool PreviousCodePointIs(const char * buffer, const char * location, CodePoint c);
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 42390bbf9..ce5c4eb63 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -109,9 +109,9 @@ const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction ac
       const char * i = s;
       while (*i != stoppingCodePoint && *i != 0) {
         if (*i == c) {
-          actionCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+          actionCodePoint(i - s, contextPointer, contextInt);
         } else {
-          actionOtherCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+          actionOtherCodePoint(i - s, contextPointer, contextInt);
         }
         i++;
       }
@@ -120,9 +120,9 @@ const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction ac
     const char * i = initialPosition - 1;
     while (i >= s && *i != stoppingCodePoint) {
       if (*i == c) {
-        actionCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+        actionCodePoint(i - s, contextPointer, contextInt);
       } else {
-        actionOtherCodePoint(const_cast<char *>(i), contextPointer, contextInt);
+        actionOtherCodePoint(i - s, contextPointer, contextInt);
       }
       i--;
     }
@@ -135,9 +135,9 @@ const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction ac
     CodePoint codePoint = decoder.nextCodePoint();
     while (codePoint != stoppingCodePoint && codePoint != UCodePointNull) {
       if (codePoint == c) {
-        actionCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+        actionCodePoint(codePointPointer - s, contextPointer, contextInt);
       } else {
-        actionOtherCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+        actionOtherCodePoint(codePointPointer - s, contextPointer, contextInt);
       }
       codePointPointer = decoder.stringPosition();
       codePoint = decoder.nextCodePoint();
@@ -153,9 +153,9 @@ const char * PerformAtCodePoints(const char * s, CodePoint c, CodePointAction ac
   const char * codePointPointer = decoder.stringPosition();
   while (codePointPointer >= s && codePoint != stoppingCodePoint) {
     if (codePoint == c) {
-      actionCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+      actionCodePoint(codePointPointer - s, contextPointer, contextInt);
     } else {
-      actionOtherCodePoint(const_cast<char *>(codePointPointer), contextPointer, contextInt);
+      actionOtherCodePoint(codePointPointer - s, contextPointer, contextInt);
     }
     if (codePointPointer > s) {
       codePoint = decoder.previousCodePoint();

From 4688e9535fe7e9219b11759c82b2041ea341fd9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 08:43:49 +0100
Subject: [PATCH 056/295] [apps] Calling draftTextLength should be done only if
 text field is editing

---
 apps/code/menu_controller.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index 658874d2f..0ce2c1c62 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -350,9 +350,11 @@ bool MenuController::textFieldDidFinishEditing(TextField * textField, const char
 
 bool MenuController::textFieldDidHandleEvent(TextField * textField, bool returnValue, bool textSizeDidChange) {
   int scriptExtensionLength = 1 + strlen(ScriptStore::k_scriptExtension);
-  const char * maxPointerLocation = textField->text() + textField->draftTextLength() - scriptExtensionLength;
-  if (textField->isEditing() && textField->cursorLocation() > maxPointerLocation) {
-    textField->setCursorLocation(maxPointerLocation);
+  if (textField->isEditing()) {
+    const char * maxPointerLocation = textField->text() + textField->draftTextLength() - scriptExtensionLength;
+    if (textField->cursorLocation() > maxPointerLocation) {
+      textField->setCursorLocation(maxPointerLocation);
+    }
   }
   return returnValue;
 }

From 34fc647ccd10ddf2933e084a0af59c7d0814e71a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 08:44:54 +0100
Subject: [PATCH 057/295] [escher/text_field] Code cleaning

---
 escher/src/text_field.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 3e795925d..d88407ee1 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -105,12 +105,12 @@ bool TextField::ContentView::insertTextAtLocation(const char * text, const char
 
   memmove(const_cast<char *>(location + textSize), location, (m_draftTextBuffer + m_currentDraftTextLength + 1) - location);
 
-  // Caution! One char will be overridden by the null-terminating char of strlcpy
-  char * overridenCharLocation = const_cast<char *>(location + strlen(text));
-  char overridenChar = *overridenCharLocation;
+  // Caution! One byte will be overridden by the null-terminating char of strlcpy
+  char * overridenByteLocation = const_cast<char *>(location + strlen(text));
+  char overridenByte = *overridenByteLocation;
   strlcpy(const_cast<char *>(location), text, (m_draftTextBuffer + m_textBufferSize) - location);
-  assert(overridenCharLocation < m_draftTextBuffer + m_textBufferSize);
-  *overridenCharLocation = overridenChar;
+  assert(overridenByteLocation < m_draftTextBuffer + m_textBufferSize);
+  *overridenByteLocation = overridenByte;
   m_currentDraftTextLength += textSize;
 
   UTF8Decoder decoder(m_draftTextBuffer);
@@ -120,6 +120,7 @@ bool TextField::ContentView::insertTextAtLocation(const char * text, const char
   while (codePoint != UCodePointNull) {
     assert(codePointPointer < m_draftTextBuffer + m_textBufferSize);
     if (codePoint == '\n') {
+      assert(UTF8Decoder::CharSizeOfCodePoint('\n') == 1);
       *(const_cast<char *>(codePointPointer)) = 0;
       m_currentDraftTextLength = codePointPointer - m_draftTextBuffer;
       break;

From b006b0c7ae4103d92939a3fed525295fc4191396 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 09:20:52 +0100
Subject: [PATCH 058/295] [utf8_decoder] Fix previousCodePoint

---
 ion/src/shared/unicode/utf8_decoder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index 73ef028a1..a91895417 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -52,7 +52,7 @@ CodePoint UTF8Decoder::previousCodePoint() {
   assert(leadingOnes > 1 && leadingOnes <= 4);
   assert(m_stringPosition >= m_string);
 
-  result+= last_k_bits(*m_stringPosition, 8-leadingOnes-1);
+  result+= last_k_bits(*m_stringPosition, 8-leadingOnes-1) << (6*i);
   return CodePoint(result);
 }
 

From c476ea5380aefe5e6ba372e7d364a4491ed96cc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 09:44:31 +0100
Subject: [PATCH 059/295] [escher/text_field] Fix removeCodePoint rect dirtying

---
 escher/src/text_field.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index d88407ee1..2ee9ef894 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -145,6 +145,11 @@ KDSize TextField::ContentView::minimalSizeForOptimalDisplay() const {
 bool TextField::ContentView::removeCodePoint() {
   assert(m_isEditing);
 
+  if (m_horizontalAlignment > 0.0f) {
+    /* Reload the view. If we do it later, the text beins supposedly shorter, we
+     *  will not clean the first char. */
+    reloadRectFromPosition(m_draftTextBuffer);
+  }
   // Remove the code point if possible
   CodePoint removedCodePoint = 0;
   int removedSize = UTF8Helper::RemovePreviousCodePoint(m_draftTextBuffer, const_cast<char *>(cursorLocation()), &removedCodePoint);
@@ -157,10 +162,7 @@ bool TextField::ContentView::removeCodePoint() {
   m_currentDraftTextLength-= removedSize;
   assert(m_draftTextBuffer[m_currentDraftTextLength] == 0);
 
-  // Reload the view and set the cursor location
-  if (m_horizontalAlignment > 0.0f) {
-    reloadRectFromPosition(m_draftTextBuffer);
-  }
+  // Set the cursor location and reload the view
   assert(cursorLocation() - removedSize >= m_draftTextBuffer);
   setCursorLocation(cursorLocation() - removedSize);
   if (m_horizontalAlignment == 0.0f) {

From 47e9be2574aee2a7c118cccc8616b774ae412bed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 11:54:30 +0100
Subject: [PATCH 060/295] [apps] Fix SumGraphController use of CodePointString

---
 apps/shared/storage_sum_graph_controller.cpp | 5 ++---
 apps/shared/sum_graph_controller.cpp         | 3 +--
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/apps/shared/storage_sum_graph_controller.cpp b/apps/shared/storage_sum_graph_controller.cpp
index ad351a459..0d05cb93d 100644
--- a/apps/shared/storage_sum_graph_controller.cpp
+++ b/apps/shared/storage_sum_graph_controller.cpp
@@ -242,18 +242,17 @@ void StorageSumGraphController::LegendView::setSumSymbol(Step step, double start
     char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sigmaLength),
         LayoutHelper::String(buffer, strlen(buffer), k_font),
         EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, k_font, false));
   } else {
-    m_sumLayout = LayoutHelper::CodePointString(sigma, sizeof(sigma));
     char buffer[2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout start = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
     PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout end = LayoutHelper::String(buffer, strlen(buffer), k_font);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sigmaLength),
         start,
         end);
     strlcpy(buffer, "= ", 3);
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 12e4d222d..deb279781 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -245,7 +245,6 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
         LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont),
         EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, KDFont::SmallFont, false));
   } else {
-    m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaSize);
     constexpr size_t bufferSize = 2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
     char buffer[bufferSize];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
@@ -253,7 +252,7 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
     PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout end = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sigmaSize),
         start,
         end);
     strlcpy(buffer, "= ", bufferSize);

From 7f4ef39d0cf49d2e657577e5b3783ad6cf507817 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 14:01:20 +0100
Subject: [PATCH 061/295] [text_area] Fix Text::Position use with unicode

A glyph offset is not equivalent to a code point offset since a code
point can be several glyphs long.
---
 apps/code/python_text_area.cpp         | 53 +++++++++++++-------------
 escher/include/escher/text_area.h      |  3 ++
 escher/src/text_area.cpp               | 11 +++---
 ion/include/ion/unicode/utf8_helper.h  |  4 ++
 ion/src/shared/unicode/utf8_helper.cpp | 49 ++++++++++++++++++++++++
 kandinsky/src/context_text.cpp         |  7 +++-
 6 files changed, 93 insertions(+), 34 deletions(-)

diff --git a/apps/code/python_text_area.cpp b/apps/code/python_text_area.cpp
index e39b7bb43..b38700d23 100644
--- a/apps/code/python_text_area.cpp
+++ b/apps/code/python_text_area.cpp
@@ -18,7 +18,7 @@ constexpr KDColor OperatorColor = KDColor::RGB24(0xd73a49);
 constexpr KDColor StringColor = KDColor::RGB24(0x032f62);
 constexpr KDColor BackgroundColor = KDColorWhite;
 
-static inline int minInt(int x, int y) { return x < y ? x : y; }
+static inline const char * minPointer(const char * x, const char * y) { return x < y ? x : y; }
 
 static inline KDColor TokenColor(mp_token_kind_t tokenKind) {
   if (tokenKind == MP_TOKEN_STRING) {
@@ -95,16 +95,18 @@ void PythonTextArea::ContentView::clearRect(KDContext * ctx, KDRect rect) const
 #define LOG_DRAW(...)
 #endif
 
-void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char * text, size_t length, int fromColumn, int toColumn) const {
-  LOG_DRAW("Drawing \"%.*s\"\n", length, text);
+void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char * text, size_t byteLength, int fromColumn, int toColumn) const {
+  LOG_DRAW("Drawing \"%.*s\"\n", byteLength, text);
 
   if (!m_pythonDelegate->isPythonUser(this)) {
+    const char * lineStart = UTF8Helper::CodePointAtGlyphOffset(text, fromColumn);
+    const char * lineEnd = UTF8Helper::CodePointAtGlyphOffset(text, toColumn);
     drawStringAt(
       ctx,
       line,
       fromColumn,
-      text + fromColumn,
-      minInt(length - fromColumn, toColumn - fromColumn),
+      lineStart,
+      minPointer(text + byteLength, lineEnd) - lineStart,
       StringColor,
       BackgroundColor
     );
@@ -117,29 +119,29 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
      * basis. This can work, however the MicroPython lexer won't accept a line
      * starting with a whitespace. So we're discarding leading whitespaces
      * beforehand. */
-    size_t whitespaceOffset = 0;
-    while (text[whitespaceOffset] == ' ' && whitespaceOffset < length) {
-      whitespaceOffset++;
+    UTF8Decoder decoder(text);
+    const char * p = decoder.stringPosition();
+    CodePoint c = decoder.nextCodePoint();
+    while (p < text + byteLength && c  == ' ') {
+        p = decoder.stringPosition();
+        c = decoder.nextCodePoint();
     }
 
-    mp_lexer_t * lex = mp_lexer_new_from_str_len(0, text + whitespaceOffset, length - whitespaceOffset, 0);
+    mp_lexer_t * lex = mp_lexer_new_from_str_len(0, p, byteLength - (p - text), 0);
     LOG_DRAW("Pop token %d\n", lex->tok_kind);
 
-    size_t tokenFrom = 0;
+    const char * tokenFrom = p;
     size_t tokenLength = 0;
-    KDColor tokenColor = KDColorBlack;
-
     while (lex->tok_kind != MP_TOKEN_NEWLINE && lex->tok_kind != MP_TOKEN_END) {
-      tokenFrom = whitespaceOffset + lex->tok_column - 1;
-      tokenLength = TokenLength(lex);
-      tokenColor = TokenColor(lex->tok_kind);
 
-      LOG_DRAW("Draw \"%.*s\" for token %d\n", tokenLength, text + tokenFrom, lex->tok_kind);
+      tokenFrom = p + lex->tok_column - 1;
+      tokenLength = TokenLength(lex);
+      LOG_DRAW("Draw \"%.*s\" for token %d\n", tokenLength, tokenFrom, lex->tok_kind);
       drawStringAt(ctx, line,
+        UTF8Helper::GlyphOffsetAtCodePoint(text, tokenFrom),
         tokenFrom,
-        text + tokenFrom, // text
-        tokenLength, // length
-        tokenColor,
+        tokenLength,
+        TokenColor(lex->tok_kind),
         BackgroundColor
       );
 
@@ -147,16 +149,15 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
       LOG_DRAW("Pop token %d\n", lex->tok_kind);
     }
 
-    tokenFrom = tokenFrom + tokenLength;
-    if (tokenFrom != length) {
-      LOG_DRAW("Draw comment \"%.*s\" from %d\n", length - tokenFrom, text + tokenFrom, tokenFrom);
+    tokenFrom += tokenLength;
+    if (tokenFrom < text + byteLength) {
+      LOG_DRAW("Draw comment \"%.*s\" from %d\n", byteLength - (tokenFrom - text), p, tokenFrom);
       drawStringAt(ctx, line,
+          UTF8Helper::GlyphOffsetAtCodePoint(text, tokenFrom),
           tokenFrom,
-          text + tokenFrom, // text
-          length - tokenFrom, // length
+          text + byteLength - tokenFrom,
           CommentColor,
-          BackgroundColor
-        );
+          BackgroundColor);
     }
 
     mp_lexer_free(lex);
diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 95d215b41..845ce8b0e 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -55,6 +55,9 @@ protected:
     };
 
     class Position {
+    /* column and line correspond to the visual column and line. The glyph at
+     * the kth column is not the the glyph of kth code point, because of
+     * combining code points that do not fave a personnal glyph. */
     public:
       Position(int column, int line) : m_column(column), m_line(line) {}
       int column() const { return m_column; }
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 3f5e7b8e1..1562c5172 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -8,9 +8,6 @@
 #include <assert.h>
 #include <limits.h>
 
-static inline size_t minSize(size_t a, size_t b) { return a < b ? a : b; }
-static inline size_t maxSize(size_t a, size_t b) { return a > b ? a : b; }
-
 /* TextArea */
 
 TextArea::TextArea(Responder * parentResponder, View * contentView, const KDFont * font) :
@@ -153,7 +150,9 @@ const char * TextArea::Text::pointerAtPosition(Position p) {
   int y = 0;
   for (Line l : *this) {
     if (p.line() == y) {
-      return l.text() + minSize(l.charLength(), maxSize(p.column(), 0));
+      const char * result = UTF8Helper::CodePointAtGlyphOffset(l.text(), p.column());
+      assert(result <= l.text() + l.charLength());
+      return result;
     }
     y++;
   }
@@ -166,7 +165,7 @@ TextArea::Text::Position TextArea::Text::positionAtPointer(const char * p) const
   size_t y = 0;
   for (Line l : *this) {
     if (l.contains(p)) {
-      size_t x = p - l.text();
+      size_t x = UTF8Helper::GlyphOffsetAtCodePoint(l.text(), p);
       return Position(x, y);
     }
     y++;
@@ -327,7 +326,7 @@ void TextArea::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
   for (Text::Line line : m_text) {
     KDCoordinate width = line.glyphWidth(m_font);
     if (y >= topLeft.line() && y <= bottomRight.line() && topLeft.column() < (int)width) {
-      drawLine(ctx, y, line.text(), width, topLeft.column(), bottomRight.column());
+      drawLine(ctx, y, line.text(), line.charLength(), topLeft.column(), bottomRight.column());
     }
     y++;
   }
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index ad585eb70..14b2ab780 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -49,6 +49,10 @@ bool CodePointIs(const char * location, CodePoint c);
 // Shift the buffer and return the number of bytes removed.
 int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c);
 
+/* Return the pointer to the (non combining) code point whose glyph is displayed
+ * at the given position, and vice-versa */
+const char * CodePointAtGlyphOffset(const char * buffer, int position);
+size_t GlyphOffsetAtCodePoint(const char * buffer, const char * position);
 
 };
 
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index ce5c4eb63..d1506f26b 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -209,4 +209,53 @@ int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c) {
   return codePointSize;
 }
 
+
+const char * CodePointAtGlyphOffset(const char * buffer, int position) {
+  assert(buffer != nullptr);
+  if (position < 0) {
+    return buffer;
+  }
+
+  UTF8Decoder decoder(buffer);
+  const char * codePointPointer = decoder.stringPosition();
+  CodePoint codePoint = decoder.nextCodePoint();
+  int glyphIndex = 0;
+  while (codePoint != UCodePointNull) {
+    if (glyphIndex == position) {
+      assert(!codePoint.isCombining());
+      return codePointPointer;
+    }
+    if (!codePoint.isCombining()) {
+      glyphIndex++;
+    }
+    codePointPointer = decoder.stringPosition();
+    codePoint = decoder.nextCodePoint();
+  }
+  assert(glyphIndex == position);
+  return codePointPointer;
+}
+
+size_t GlyphOffsetAtCodePoint(const char * buffer, const char * position) {
+  assert(position >= buffer);
+
+  UTF8Decoder decoder(buffer);
+  const char * codePointPointer = decoder.stringPosition();
+  CodePoint codePoint = decoder.nextCodePoint();
+  size_t glyphIndex = 0;
+  while (codePoint != UCodePointNull) {
+    if (codePointPointer == position) {
+      assert(!codePoint.isCombining());
+      return glyphIndex;
+    }
+    if (!codePoint.isCombining()) {
+      glyphIndex++;
+    }
+    codePointPointer = decoder.stringPosition();
+    codePoint = decoder.nextCodePoint();
+  }
+  assert(codePointPointer == position);
+  return glyphIndex;
+}
+
+
 };
diff --git a/kandinsky/src/context_text.cpp b/kandinsky/src/context_text.cpp
index 29047fcb0..49de92fe7 100644
--- a/kandinsky/src/context_text.cpp
+++ b/kandinsky/src/context_text.cpp
@@ -5,7 +5,7 @@
 
 constexpr static int k_tabCharacterWidth = 4;
 
-KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font, KDColor textColor, KDColor backgroundColor, int maxLength) {
+KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font, KDColor textColor, KDColor backgroundColor, int maxByteLength) {
   KDPoint position = p;
   KDSize glyphSize = font->glyphSize();
   KDFont::RenderPalette palette = font->renderPalette(textColor, backgroundColor);
@@ -13,8 +13,10 @@ KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font,
   KDFont::GlyphBuffer glyphBuffer;
 
   UTF8Decoder decoder(text);
+  const char * codePointPointer = decoder.stringPosition();
   CodePoint codePoint = decoder.nextCodePoint();
-  while (codePoint != UCodePointNull) {
+  while (codePoint != UCodePointNull && (maxByteLength < 0 || codePointPointer < text + maxByteLength)) {
+    codePointPointer = decoder.stringPosition();
     if (codePoint == UCodePointLineFeed) {
       position = KDPoint(0, position.y() + glyphSize.height());
       codePoint = decoder.nextCodePoint();
@@ -27,6 +29,7 @@ KDPoint KDContext::drawString(const char * text, KDPoint p, const KDFont * font,
       codePoint = decoder.nextCodePoint();
       while (codePoint.isCombining()) {
         font->accumulateGlyphGreyscalesForCodePoint(codePoint, &glyphBuffer);
+        codePointPointer = decoder.stringPosition();
         codePoint = decoder.nextCodePoint();
       }
       font->colorizeGlyphBuffer(&palette, &glyphBuffer);

From 37d05a237f2e9f50361e1eb6a159e4a8874de88c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 14:20:07 +0100
Subject: [PATCH 062/295] [apps] In consexpr char *, empty layouts should be
 inserted using /x11

---
 apps/code/catalog.universal.i18n | 16 ++++++++--------
 apps/code/toolbox.universal.i18n | 22 +++++++++++-----------
 apps/shared.universal.i18n       | 10 +++++-----
 3 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/apps/code/catalog.universal.i18n b/apps/code/catalog.universal.i18n
index 9052cee93..24f35baba 100644
--- a/apps/code/catalog.universal.i18n
+++ b/apps/code/catalog.universal.i18n
@@ -19,7 +19,7 @@ PythonCommandBin = "bin(x)"
 PythonCommandCeil = "ceil(x)"
 PythonCommandChoice = "choice(list)"
 PythonCommandCmathFunction = "cmath.function"
-PythonCommandCmathFunctionWithoutArg = "cmath.ø"
+PythonCommandCmathFunctionWithoutArg = "cmath.\x11"
 PythonCommandColor = "color(r,g,b)"
 PythonCommandComplex = "complex(a,b)"
 PythonCommandConstantPi = "pi"
@@ -48,7 +48,7 @@ PythonCommandGetPixel = "get_pixel(x,y)"
 PythonCommandGetrandbits = "getrandbits(k)"
 PythonCommandHex = "hex(x)"
 PythonCommandImag = "z.imag"
-PythonCommandImagWithoutArg = "ø.imag"
+PythonCommandImagWithoutArg = "\x11.imag"
 PythonCommandImportFromCmath = "from cmath import *"
 PythonCommandImportFromMath = "from math import *"
 PythonCommandImportFromKandinsky = "from kandinsky import *"
@@ -65,7 +65,7 @@ PythonCommandIsFinite = "isfinite(x)"
 PythonCommandIsInfinite = "isinf(x)"
 PythonCommandIsNaN = "isnan(x)"
 PythonCommandKandinskyFunction = "kandinsky.function"
-PythonCommandKandinskyFunctionWithoutArg = "kandinsky.ø"
+PythonCommandKandinskyFunctionWithoutArg = "kandinsky.\x11"
 PythonCommandLdexp = "ldexp(x,i)"
 PythonCommandLength = "len(object)"
 PythonCommandLgamma = "lgamma(x)"
@@ -74,7 +74,7 @@ PythonCommandLog10 = "log10(x)"
 PythonCommandLog2 = "log2(x)"
 PythonCommandLogComplex = "log(z,a)"
 PythonCommandMathFunction = "math.function"
-PythonCommandMathFunctionWithoutArg = "math.ø"
+PythonCommandMathFunctionWithoutArg = "math.\x11"
 PythonCommandMax = "max(list)"
 PythonCommandMin = "min(list)"
 PythonCommandModf = "modf(x)"
@@ -87,12 +87,12 @@ PythonCommandRadians = "radians(x)"
 PythonCommandRandint = "randint(a,b)"
 PythonCommandRandom = "random()"
 PythonCommandRandomFunction = "random.function"
-PythonCommandRandomFunctionWithoutArg = "random.ø"
+PythonCommandRandomFunctionWithoutArg = "random.\x11"
 PythonCommandRandrange = "randrange(start, stop)"
 PythonCommandRangeStartStop = "range(start, stop)"
 PythonCommandRangeStop = "range(stop)"
 PythonCommandReal = "z.real"
-PythonCommandRealWithoutArg = "ø.real"
+PythonCommandRealWithoutArg = "\x11.real"
 PythonCommandRect = "rect(r, arg)"
 PythonCommandRound = "round(x, n)"
 PythonCommandSeed = "seed(x)"
@@ -108,7 +108,7 @@ PythonCommandTan = "tan(x)"
 PythonCommandTanh = "tanh(x)"
 PythonCommandTrunc = "trunc(x)"
 PythonCommandTurtleFunction = "turtle.function"
-PythonCommandTurtleFunctionWithoutArg = "turtle.ø"
+PythonCommandTurtleFunctionWithoutArg = "turtle.\x11"
 PythonCommandUniform = "uniform(a,b)"
 PythonTurtleCommandBackward = "backward(x)"
 PythonTurtleCommandBlack = "'black'"
@@ -116,7 +116,7 @@ PythonTurtleCommandBlue = "'blue'"
 PythonTurtleCommandBrown = "'brown'"
 PythonTurtleCommandCircle = "circle(r)"
 PythonTurtleCommandColor = "color('c')/color(r,g,b)"
-PythonTurtleCommandColorWithoutArg = "color(ø)"
+PythonTurtleCommandColorWithoutArg = "color(\x11)"
 PythonTurtleCommandForward = "forward(x)"
 PythonTurtleCommandGoto = "goto(x,y)"
 PythonTurtleCommandGreen = "'green'"
diff --git a/apps/code/toolbox.universal.i18n b/apps/code/toolbox.universal.i18n
index 658e46c80..4fa5710d3 100644
--- a/apps/code/toolbox.universal.i18n
+++ b/apps/code/toolbox.universal.i18n
@@ -21,27 +21,27 @@ NonEqualityCondition = "!="
 NonEqualityConditionWithArg = "x!=y"
 EqualityCondition = "=="
 EqualityConditionWithArg = "x==y"
-WhileLoop = "while ø:\n  "
+WhileLoop = "while \x11:\n  "
 WhileLoopWithArg = "while condition:\n  instruction"
-IfOrIfElseStatement = "if ø or :\n  \nelse:\n  "
+IfOrIfElseStatement = "if \x11 or :\n  \nelse:\n  "
 IfOrIfElseStatementWithArg = "if condition1 or condition2:\n  instruction1\nelse:\n  instruction2"
-IfAndIfElseStatement = "if ø and :\n  \nelse:\n  "
+IfAndIfElseStatement = "if \x11 and :\n  \nelse:\n  "
 IfAndIfElseStatementWithArg = "if condition1 and condition2:\n  instruction1\nelse:\n  instruction2"
-IfElifElseStatement = "if ø:\n  \nelif :\n  \nelse:\n  "
+IfElifElseStatement = "if \x11:\n  \nelif :\n  \nelse:\n  "
 IfElifElseStatementWithArg = "if condition1:\n  instruction1\nelif condition2:\n  instruction2\nelse:\n  instruction3"
-IfThenStatement= "if ø:\n  "
+IfThenStatement= "if \x11:\n  "
 IfThenStatementWithArg = "if condition:\n  instruction"
-IfElseStatement = "if ø:\n  \nelse:\n  "
+IfElseStatement = "if \x11:\n  \nelse:\n  "
 IfElseStatementWithArg = "if condition:\n  instruction1\nelse:\n  instruction2"
-ForInListLoop = "for i in ø:\n  "
+ForInListLoop = "for i in \x11:\n  "
 ForInListLoopWithArg = "for i in list:\n  instruction"
-ForInRange3ArgsLoop = "for i in range(ø,,):\n  "
+ForInRange3ArgsLoop = "for i in range(\x11,,):\n  "
 ForInRange3ArgsLoopWithArg = "for i in range(start, stop, step):\n  instruction"
-ForInRange2ArgsLoop = "for i in range(ø,):\n  "
+ForInRange2ArgsLoop = "for i in range(\x11,):\n  "
 ForInRange2ArgsLoopWithArg = "for i in range(start, stop):\n  instruction"
-ForInRange1ArgLoop = "for i in range(ø):\n  "
+ForInRange1ArgLoop = "for i in range(\x11):\n  "
 ForInRange1ArgLoopWithArg = "for i in range(size):\n  instruction"
-PythonCommandDef = "def ø():\n  "
+PythonCommandDef = "def \x11():\n  "
 PythonCommandDefWithArg = "def function(x):"
 PythonCommandReturn = "return "
 RandomModule = "random"
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index 06ba91a51..9a39f69d2 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -18,7 +18,7 @@ CoshCommandWithArg = "cosh(x)"
 D = "d"
 DeterminantCommandWithArg = "det(M)"
 DiffCommandWithArg = "diff(f(x),x,a)"
-DiffCommand = "diff(ø,x,ø)"
+DiffCommand = "diff(\x11,x,\x11)"
 DimensionCommandWithArg = "dim(M)"
 DiscreteLegend = "P(X="
 DiscriminantFormulaDegree2 = "Δ=b^2-4ac"
@@ -31,7 +31,7 @@ FloorCommandWithArg = "floor(x)"
 FracCommandWithArg = "frac(x)"
 GcdCommandWithArg = "gcd(p,q)"
 ImCommandWithArg = "im(z)"
-IntCommand = "int(ø,x,ø,ø)"
+IntCommand = "int(\x11,x,\x11,\x11)"
 IntCommandWithArg = "int(f(x),x,a,b)"
 InverseCommandWithArg = "inverse(M)"
 InvSortCommandWithArg = "sort>(L)"
@@ -41,7 +41,7 @@ LeftIntegralFirstLegend = "P(X≤"
 LeftIntegralSecondLegend = ")="
 LinearRegressionFormula  = " y=a•x+b "
 LogCommandWithArg = "log(x,a)"
-MatrixCommand = "[[ø]]"
+MatrixCommand = "[[\x11]]"
 MatrixCommandWithArg = "[[1,2][3,4]]"
 MaxCommandWithArg = "max(L)"
 MinCommandWithArg = "min(L)"
@@ -51,7 +51,7 @@ PermuteCommandWithArg = "permute(n,r)"
 P = "p"
 Prediction95CommandWithArg = "prediction95(p,n)"
 PredictionCommandWithArg = "prediction(p,n)"
-ProductCommand = "product(ø,n,ø,ø)"
+ProductCommand = "product(\x11,n,\x11,\x11)"
 ProductCommandWithArg = "product(f(n),n,nmin,nmax)"
 QuoCommandWithArg = "quo(p,q)"
 RandintCommandWithArg = "randint(a,b)"
@@ -67,7 +67,7 @@ Shift = "shift"
 Sigma = "σ"
 SinhCommandWithArg = "sinh(x)"
 SortCommandWithArg = "sort<(L)"
-SumCommand = "sum(ø,n,ø,ø)"
+SumCommand = "sum(\x11,n,\x11,\x11)"
 SumCommandWithArg = "sum(f(n),n,nmin,nmax)"
 Sxy = "Σxy"
 TanhCommandWithArg = "tanh(x)"

From 4e93a564b63e60607536ddc156002763d164d363 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 14:21:34 +0100
Subject: [PATCH 063/295] [escher/ion] Fix wrong assertions

---
 escher/src/text_area.cpp               | 5 +++--
 ion/src/shared/unicode/utf8_helper.cpp | 2 --
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 1562c5172..7c54eb401 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -8,6 +8,8 @@
 #include <assert.h>
 #include <limits.h>
 
+static inline const char * minPointer(const char * x, const char * y) { return x < y ? x : y; }
+
 /* TextArea */
 
 TextArea::TextArea(Responder * parentResponder, View * contentView, const KDFont * font) :
@@ -151,8 +153,7 @@ const char * TextArea::Text::pointerAtPosition(Position p) {
   for (Line l : *this) {
     if (p.line() == y) {
       const char * result = UTF8Helper::CodePointAtGlyphOffset(l.text(), p.column());
-      assert(result <= l.text() + l.charLength());
-      return result;
+      return minPointer(result, l.text() + l.charLength());
     }
     y++;
   }
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index d1506f26b..4aed034ca 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -231,7 +231,6 @@ const char * CodePointAtGlyphOffset(const char * buffer, int position) {
     codePointPointer = decoder.stringPosition();
     codePoint = decoder.nextCodePoint();
   }
-  assert(glyphIndex == position);
   return codePointPointer;
 }
 
@@ -253,7 +252,6 @@ size_t GlyphOffsetAtCodePoint(const char * buffer, const char * position) {
     codePointPointer = decoder.stringPosition();
     codePoint = decoder.nextCodePoint();
   }
-  assert(codePointPointer == position);
   return glyphIndex;
 }
 

From 5df9e0af71324bc3395a92f78b07260602565e8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 25 Jan 2019 14:30:09 +0100
Subject: [PATCH 064/295] Use correct unicode symbols

---
 apps/probability/base.de.i18n       |  2 +-
 apps/probability/base.en.i18n       |  2 +-
 apps/probability/base.es.i18n       |  2 +-
 apps/probability/base.fr.i18n       |  2 +-
 apps/probability/base.pt.i18n       |  2 +-
 apps/regression/base.universal.i18n | 16 ++++++++--------
 apps/shared.universal.i18n          |  6 +++---
 escher/src/layout_field.cpp         |  2 +-
 8 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/apps/probability/base.de.i18n b/apps/probability/base.de.i18n
index 4ea05bd8d..db0ec9c76 100644
--- a/apps/probability/base.de.i18n
+++ b/apps/probability/base.de.i18n
@@ -16,7 +16,7 @@ RepetitionNumber = "n: Anzahl der Versuche"
 SuccessProbability = "p: Erfolgswahrscheinlichkeit"
 IntervalDefinition = "[a,b]: Intervall"
 LambdaExponentialDefinition = "λ: Parameter"
-MeanDefinition = "μ: Erwartungswert"
+MeanDefinition = "µ: Erwartungswert"
 DeviationDefinition = "σ: Standardabweichung"
 LambdaPoissonDefinition = "λ: Parameter"
 ComputeProbability = "Wahrscheinlichkeit berechnen"
diff --git a/apps/probability/base.en.i18n b/apps/probability/base.en.i18n
index e5c7f8b8f..508963c40 100644
--- a/apps/probability/base.en.i18n
+++ b/apps/probability/base.en.i18n
@@ -16,7 +16,7 @@ RepetitionNumber = "n: Number of trials"
 SuccessProbability = "p: Success probability"
 IntervalDefinition = "[a,b]: Interval"
 LambdaExponentialDefinition = "λ: Rate parameter"
-MeanDefinition = "μ: Mean"
+MeanDefinition = "µ: Mean"
 DeviationDefinition = "σ: Standard deviation"
 LambdaPoissonDefinition = "λ: Parameter"
 ComputeProbability = "Calculate probabilities"
diff --git a/apps/probability/base.es.i18n b/apps/probability/base.es.i18n
index 94525d379..515b99191 100644
--- a/apps/probability/base.es.i18n
+++ b/apps/probability/base.es.i18n
@@ -16,7 +16,7 @@ RepetitionNumber = "n : Numero de ensayos "
 SuccessProbability = "p : Probabilidad de exito "
 IntervalDefinition = "[a,b] : Intervalo"
 LambdaExponentialDefinition = "λ : Parametro"
-MeanDefinition = "μ : Media"
+MeanDefinition = "µ : Media"
 DeviationDefinition = "σ : Desviacion tipica"
 LambdaPoissonDefinition = "λ : Parametro"
 ComputeProbability = "Calcular las probabilidades"
diff --git a/apps/probability/base.fr.i18n b/apps/probability/base.fr.i18n
index aba535c5f..7b8a19afb 100644
--- a/apps/probability/base.fr.i18n
+++ b/apps/probability/base.fr.i18n
@@ -16,7 +16,7 @@ RepetitionNumber = "n : Nombre de repetitions"
 SuccessProbability = "p : Probabilite de succes"
 IntervalDefinition = "[a,b] : Intervalle"
 LambdaExponentialDefinition = "λ : Parametre"
-MeanDefinition = "μ : Espérance ou moyenne"
+MeanDefinition = "µ : Espérance ou moyenne"
 DeviationDefinition = "σ : Ecart type"
 LambdaPoissonDefinition = "λ : Parametre"
 ComputeProbability = "Calculer les probabilites"
diff --git a/apps/probability/base.pt.i18n b/apps/probability/base.pt.i18n
index bd8921b32..63faf5620 100644
--- a/apps/probability/base.pt.i18n
+++ b/apps/probability/base.pt.i18n
@@ -16,7 +16,7 @@ RepetitionNumber = "n : Numero de ensaios"
 SuccessProbability = "p : Probabilidade de sucesso"
 IntervalDefinition = "[a,b] : Intervalo"
 LambdaExponentialDefinition = "λ : Parametro"
-MeanDefinition = "μ : Media"
+MeanDefinition = "µ : Media"
 DeviationDefinition = "σ : Desvio padrao"
 LambdaPoissonDefinition = "λ : Parametro"
 ComputeProbability = "Calcular probabilidades"
diff --git a/apps/regression/base.universal.i18n b/apps/regression/base.universal.i18n
index 6ea54ed9c..387275113 100644
--- a/apps/regression/base.universal.i18n
+++ b/apps/regression/base.universal.i18n
@@ -1,9 +1,9 @@
-QuadraticRegressionFormula  = " y=a•x^2+b•x+c "
-CubicRegressionFormula  = " y=a•x^3+b•x^2+c•x+d "
-QuarticRegressionFormula  = " y=a•x^4+b•x^3+c•x^2+d•x+e "
-LogarithmicRegressionFormula  = " y=a•ln(x)+b "
-ExponentialRegressionFormula  = " y=a•exp(b•x) "
-PowerRegressionFormula  = " y=a•x^b "
-TrigonometricRegressionFormula  = " y=a•sin(b•x+c)+d "
-LogisticRegressionFormula  = " y=c/(a+exp(-b•x)) "
+QuadraticRegressionFormula  = " y=a·x^2+b·x+c "
+CubicRegressionFormula  = " y=a·x^3+b·x^2+c·x+d "
+QuarticRegressionFormula  = " y=a·x^4+b·x^3+c·x^2+d·x+e "
+LogarithmicRegressionFormula  = " y=a·ln(x)+b "
+ExponentialRegressionFormula  = " y=a·exp(b·x) "
+PowerRegressionFormula  = " y=a·x^b "
+TrigonometricRegressionFormula  = " y=a·sin(b·x+c)+d "
+LogisticRegressionFormula  = " y=c/(a+exp(-b·x)) "
 Dash = "-"
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index 9a39f69d2..ed9d746f0 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -39,13 +39,13 @@ Lambda = "λ"
 LcmCommandWithArg = "lcm(p,q)"
 LeftIntegralFirstLegend = "P(X≤"
 LeftIntegralSecondLegend = ")="
-LinearRegressionFormula  = " y=a•x+b "
+LinearRegressionFormula  = " y=a·x+b "
 LogCommandWithArg = "log(x,a)"
 MatrixCommand = "[[\x11]]"
 MatrixCommandWithArg = "[[1,2][3,4]]"
 MaxCommandWithArg = "max(L)"
 MinCommandWithArg = "min(L)"
-Mu = "μ"
+Mu = "µ"
 N = "n"
 PermuteCommandWithArg = "permute(n,r)"
 P = "p"
@@ -69,7 +69,7 @@ SinhCommandWithArg = "sinh(x)"
 SortCommandWithArg = "sort<(L)"
 SumCommand = "sum(\x11,n,\x11,\x11)"
 SumCommandWithArg = "sum(f(n),n,nmin,nmax)"
-Sxy = "Σxy"
+Sxy = "∑xy"
 TanhCommandWithArg = "tanh(x)"
 TraceCommandWithArg = "trace(M)"
 TransposeCommandWithArg = "transpose(M)"
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index 3f2abcbff..5fba22bea 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -99,7 +99,7 @@ bool LayoutField::handleEventWithText(const char * text, bool indentation, bool
   if (currentNumberOfLayouts >= k_maxNumberOfLayouts - 6) {
     /* We add -6 because in some cases (Ion::Events::Division,
      * Ion::Events::Exp...) we let the layout cursor handle the layout insertion
-     * and these events may add at most 6 layouts (e.g *10^•). */
+     * and these events may add at most 6 layouts (e.g *10^). */
     return true;
   }
 

From 2e65bd3e51537e56d20a44f122c2a36a870b74dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 10:36:11 +0100
Subject: [PATCH 065/295] [poincare] Clearer CodePointLayout log

---
 poincare/include/poincare/code_point_layout.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index 97fcfdae9..458641c39 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -4,6 +4,7 @@
 #include <ion/unicode/code_point.h>
 #include <poincare/layout_cursor.h>
 #include <poincare/layout.h>
+#include <poincare/serialization_helper.h>
 
 namespace Poincare {
 
@@ -40,7 +41,10 @@ public:
     stream << "CodePointLayout";
   }
   virtual void logAttributes(std::ostream & stream) const override {
-    stream << " CodePoint=\"" << m_codePoint << "\"";
+    constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
+    char buffer[bufferSize];
+    SerializationHelper::CodePoint(buffer, bufferSize, m_codePoint);
+    stream << " CodePoint=\"" << buffer << "\"";
   }
 #endif
 

From 87d7d5883202489d2dc6a803ece098400a6b32b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 10:36:35 +0100
Subject: [PATCH 066/295] [poincare] Fix Decimal serialization

---
 poincare/src/decimal.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index 62dcab336..b92880660 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -195,11 +195,13 @@ int DecimalNode::convertToText(char * buffer, int bufferSize, Preferences::Print
     return currentChar;
   }
   /* Case 1: Decimal mode */
+  assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
+  assert(UTF8Decoder::CharSizeOfCodePoint('0') == 1);
   int deltaCharMantissa = exponent < 0 ? -exponent+1 : 0;
   strlcpy(buffer+currentChar+deltaCharMantissa, tempBuffer, maxInt(0, bufferSize-deltaCharMantissa-currentChar));
   if (exponent < 0) {
     for (int i = 0; i <= -exponent; i++) {
-      currentChar += SerializationHelper::CodePoint(buffer + currentChar, bufferSize - currentChar, i == 1 ? '.' : '0');
+      buffer[currentChar++] = i == 1 ? '.' : '0';
       if (currentChar >= bufferSize-1) { return bufferSize-1; }
     }
   }

From 9dd6b41b397f9d3f0bda759e4ce1cd32b5ef5095 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 10:47:29 +0100
Subject: [PATCH 067/295] [unicode] Fix code point serialization

---
 ion/src/shared/unicode/utf8_decoder.cpp | 12 ++++++------
 poincare/src/serialization_helper.cpp   |  8 ++++++--
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index a91895417..c95279bb1 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -79,22 +79,22 @@ size_t UTF8Decoder::CodePointToChars(CodePoint c, char * buffer, size_t bufferSi
     buffer[i++] = c;
   } else if (charCount == 2) {
     buffer[i++] = 0b11000000 | (c >> 6);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   } else if (charCount == 3) {
     buffer[i++] = 0b11100000 | (c >> 12);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   } else {
     assert(charCount == 4);
     buffer[i++] = 0b11110000 | (c >> 18);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | ((c >> 12) & 0b111111);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | ((c >> 6) & 0b111111);
-    if (bufferSize <= i) { return i; }
+    if (bufferSize <= i) { return bufferSize; }
     buffer[i++] = 0b10000000 | (c & 0b111111);
   }
   assert(i == charCount);
diff --git a/poincare/src/serialization_helper.cpp b/poincare/src/serialization_helper.cpp
index 770acec6b..7c9ec1fb9 100644
--- a/poincare/src/serialization_helper.cpp
+++ b/poincare/src/serialization_helper.cpp
@@ -184,8 +184,12 @@ int SerializationHelper::CodePoint(char * buffer, int bufferSize, class CodePoin
     }
   }
   size_t size = UTF8Decoder::CodePointToChars(c, buffer, bufferSize);
-  assert(size <= bufferSize - 1);
-  buffer[size] = 0;
+  if (size <= bufferSize - 1) {
+    buffer[size] = 0;
+  } else {
+    assert(size -1 == bufferSize - 1);
+    buffer[--size] = 0;
+  }
   return size;
 }
 

From 12e1f6be583da66843d0c4ccd366753eadf7fb4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 11:05:55 +0100
Subject: [PATCH 068/295] [unicode] Fix stop condition of
 CopyAndRemoveCodePoint

---
 ion/include/ion/unicode/utf8_helper.h  | 3 ++-
 ion/src/shared/unicode/utf8_helper.cpp | 7 +++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 14b2ab780..ffc37f38d 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -14,7 +14,8 @@ int CountOccurrences(const char * s, CodePoint c);
 const char * CodePointSearch(const char * s, CodePoint c);
 
 /* Copy src into dst while removing all code points c. Also update an index
- * that should be lower if code points where removed before it. */
+ * that should be lower if code points where removed before it. Ensure null-
+ * termination of dst. */
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
 /* Copy src into dst until end of dst or code point c, with null termination. Return the length of the copy */
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 4aed034ca..32c2cba58 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -55,16 +55,18 @@ const char * CodePointSearch(const char * s, CodePoint c) {
 }
 
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * pointerToUpdate) {
+  if (dstSize <= 0) {
+    return;
+  }
   UTF8Decoder decoder(src);
   const char * currentPointer = src;
-  const char * maxPointer = src + strlen(src) + 1;
   CodePoint codePoint = decoder.nextCodePoint();
   const char * nextPointer = decoder.stringPosition();
   size_t bufferIndex = 0;
   size_t codePointCharSize = UTF8Decoder::CharSizeOfCodePoint(c);
 
   // Remove CodePoint c
-  while (currentPointer < maxPointer && bufferIndex < dstSize) {
+  while (codePoint != UCodePointNull && bufferIndex < dstSize) {
     if (codePoint != c) {
       int copySize = minInt(nextPointer - currentPointer, dstSize - bufferIndex);
       memcpy(dst + bufferIndex, currentPointer, copySize);
@@ -77,6 +79,7 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
     codePoint = decoder.nextCodePoint();
     nextPointer = decoder.stringPosition();
   }
+  *(dst + minInt(bufferIndex, dstSize - 1)) = 0;
 }
 
 size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c) {

From d91fdeb12b4ccbbe3c6e9b25b99275aac107487b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 11:31:09 +0100
Subject: [PATCH 069/295] [unicode] Fix stop condition in
 TextArea::Text::removeRemainingLine

---
 escher/src/text_area.cpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 7c54eb401..2a96c85c8 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -224,7 +224,7 @@ size_t TextArea::Text::removeRemainingLine(const char * location, int direction)
   }
   while (nextCodePoint != '\n'
       && ((direction > 0 && nextCodePoint != 0)
-        || (direction < 0 && codePointPosition >= m_buffer)))
+        || (direction < 0 && codePointPosition > m_buffer)))
   {
     if (direction > 0) {
       codePointPosition = decoder.stringPosition();
@@ -234,14 +234,15 @@ size_t TextArea::Text::removeRemainingLine(const char * location, int direction)
       codePointPosition = decoder.stringPosition();
     }
   }
-  size_t delta = direction > 0 ? codePointPosition - location : location - codePointPosition;
-  if (delta == 0) {
-    return 0;
-  }
 
   char * dst = const_cast<char* >(direction > 0 ? location : codePointPosition);
   char * src = const_cast<char* >(direction > 0 ? codePointPosition : location);
-  assert(src > dst);
+  assert(src >= dst);
+
+  size_t delta = src - dst;
+  if (delta == 0) {
+    return 0;
+  }
   for (size_t index = src - m_buffer; index < m_bufferSize; index++) {
     *dst = *src;
     if (*src == 0) {

From ac5311d257de5f1122270c9391e610271e5338f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 11:39:11 +0100
Subject: [PATCH 070/295] [escher/text_area] Fix rect dirtying after Clear
 event

---
 escher/src/text_area.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 2a96c85c8..b23104808 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -416,7 +416,7 @@ bool TextArea::ContentView::removeStartOfLine() {
   if (removedLine > 0) {
     assert(cursorLocation() >= text() + removedLine);
     setCursorLocation(cursorLocation() - removedLine);
-    reloadRectFromPosition(cursorLocation(), false);
+    reloadRectFromPosition(cursorLocation(), true);
     return true;
   }
   return false;

From 4c5251f04fa959597f5c6c746a51c0406d0a6f23 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 16:51:28 +0100
Subject: [PATCH 071/295] [unicode] Use unicode when dealing with chars - Part
 2

---
 apps/code/app.cpp                             |  3 +-
 apps/code/editor_controller.cpp               | 26 ++++--------
 apps/code/menu_controller.cpp                 |  7 +++-
 apps/code/python_toolbox.cpp                  | 37 ++++++++--------
 apps/code/script.cpp                          | 26 +++++-------
 apps/code/variable_box_controller.cpp         |  3 +-
 apps/probability/calculation_controller.cpp   | 10 +++--
 apps/regression/graph_controller.cpp          |  1 +
 apps/shared/storage_cartesian_function.cpp    | 22 +++++-----
 apps/shared/storage_function.cpp              | 26 +++++++-----
 apps/shared/toolbox_helpers.cpp               | 42 ++++++++++---------
 .../values_function_parameter_controller.cpp  | 10 ++---
 apps/solver/list_controller.cpp               |  6 +--
 apps/statistics/box_controller.cpp            |  6 ++-
 apps/statistics/histogram_controller.cpp      | 12 +++---
 apps/variable_box_controller.cpp              |  4 +-
 escher/src/text_area.cpp                      |  8 ++--
 ion/include/ion/unicode/utf8_helper.h         | 19 ++++++---
 ion/src/shared/unicode/utf8_helper.cpp        | 42 +++++++++++++++++++
 poincare/src/integral_layout.cpp              |  3 +-
 20 files changed, 186 insertions(+), 127 deletions(-)

diff --git a/apps/code/app.cpp b/apps/code/app.cpp
index 16dfa0150..f3f368a8a 100644
--- a/apps/code/app.cpp
+++ b/apps/code/app.cpp
@@ -3,6 +3,7 @@
 #include "code_icon.h"
 #include <apps/i18n.h>
 #include "helpers.h"
+#include <ion/unicode/utf8_helper.h>
 
 namespace Code {
 
@@ -47,7 +48,7 @@ bool App::Snapshot::lockOnConsole() const {
 void App::Snapshot::setOpt(const char * name, char * value) {
   if (strcmp(name, "script") == 0) {
     m_scriptStore.deleteAllScripts();
-    char * separator = strchr(value, ':');
+    char * separator = const_cast<char *>(UTF8Helper::CodePointSearch(value, ':'));
     if (!separator) {
       return;
     }
diff --git a/apps/code/editor_controller.cpp b/apps/code/editor_controller.cpp
index 6bf45eca7..854793fc9 100644
--- a/apps/code/editor_controller.cpp
+++ b/apps/code/editor_controller.cpp
@@ -69,17 +69,10 @@ bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events:
   if (event == Ion::Events::Backspace) {
     /* If the cursor is on the left of the text of a line, backspace one
      * indentation space at a time. */
-    char * text = const_cast<char *>(textArea->text());
-    const char * charBeforeCursorPointer = textArea->cursorLocation()-1;
-    int indentationSize = 0;
-    while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
-      charBeforeCursorPointer--;
-      indentationSize++;
-    }
-    if (charBeforeCursorPointer >= text
-        && *charBeforeCursorPointer == '\n'
-        && indentationSize >= k_indentationSpacesNumber)
-    {
+    const char * text = textArea->text();
+    const char * firstNonSpace = UTF8Helper::NotCodePointSearch(text, ' ', true, textArea->cursorLocation());
+    assert(firstNonSpace >= text);
+    if (UTF8Helper::CodePointIs(firstNonSpace, '\n') && ((text - firstNonSpace)/UTF8Decoder::CharSizeOfCodePoint(' ')) >= k_indentationSpacesNumber) {
       for (int i = 0; i < k_indentationSpacesNumber; i++) {
         textArea->removeCodePoint();
       }
@@ -88,12 +81,11 @@ bool EditorController::textAreaDidReceiveEvent(TextArea * textArea, Ion::Events:
   } else if (event == Ion::Events::Space) {
     /* If the cursor is on the left of the text of a line, a space triggers an
      * indentation. */
-    char * text = const_cast<char *>(textArea->text());
-    const char * charBeforeCursorPointer = textArea->cursorLocation()-1;
-    while (charBeforeCursorPointer >= text && *charBeforeCursorPointer == ' ') {
-      charBeforeCursorPointer--;
-    }
-    if (charBeforeCursorPointer >= text && *charBeforeCursorPointer == '\n') {
+    const char * text = textArea->text();
+    const char * firstNonSpace = UTF8Helper::NotCodePointSearch(text, ' ', true, textArea->cursorLocation());
+    assert(firstNonSpace >= text);
+    if (UTF8Helper::CodePointIs(firstNonSpace, '\n')) {
+      assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
       char indentationBuffer[k_indentationSpacesNumber+1];
       for (int i = 0; i < k_indentationSpacesNumber; i++) {
         indentationBuffer[i] = ' ';
diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index 0ce2c1c62..60dda9eec 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -5,6 +5,7 @@
 #include <assert.h>
 #include <escher/metric.h>
 #include <ion/events.h>
+#include <ion/unicode/utf8_decoder.h>
 
 namespace Code {
 
@@ -303,16 +304,18 @@ bool MenuController::textFieldDidReceiveEvent(TextField * textField, Ion::Events
 bool MenuController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
   const char * newName;
   static constexpr int bufferSize = Script::k_defaultScriptNameMaxSize + 1 + ScriptStore::k_scriptExtensionLength; //"script99" + "." + "py"
-
   char numberedDefaultName[bufferSize];
+
   if (strlen(text) > 1 + strlen(ScriptStore::k_scriptExtension)) {
     newName = text;
   } else {
     // The user entered an empty name. Use a numbered default script name.
     bool foundDefaultName = Script::DefaultName(numberedDefaultName, Script::k_defaultScriptNameMaxSize);
     int defaultNameLength = strlen(numberedDefaultName);
+    assert(defaultNameLength < bufferSize);
+    assert(UTF8Decoder::CharSizeOfCodePoint('.') == 1);
     numberedDefaultName[defaultNameLength++] = '.';
-    strlcpy(&numberedDefaultName[defaultNameLength], ScriptStore::k_scriptExtension, bufferSize - defaultNameLength);
+    strlcpy(numberedDefaultName + defaultNameLength, ScriptStore::k_scriptExtension, bufferSize - defaultNameLength);
     /* If there are already scripts named script1.py, script2.py,... until
      * Script::k_maxNumberOfDefaultScriptNames, we want to write the last tried
      * default name and let the user modify it. */
diff --git a/apps/code/python_toolbox.cpp b/apps/code/python_toolbox.cpp
index 771f5624b..01dfc7cdd 100644
--- a/apps/code/python_toolbox.cpp
+++ b/apps/code/python_toolbox.cpp
@@ -330,9 +330,12 @@ bool PythonToolbox::handleEvent(Ion::Events::Event event) {
   if (Toolbox::handleEvent(event)) {
     return true;
   }
-  if (event.hasText() && strlen(event.text()) == 1) {
-    scrollToLetter(event.text()[0]);
-    return true;
+  if (event.hasText() && strlen(event.text()) == 1 ) {
+    char c = event.text()[0];
+    if (UTF8Helper::CodePointIsLetter(c)) {
+      scrollToLetter(c);
+      return true;
+    }
   }
   return false;
 }
@@ -389,24 +392,24 @@ int PythonToolbox::maxNumberOfDisplayedRows() {
 }
 
 void PythonToolbox::scrollToLetter(char letter) {
+  assert(UTF8Helper::CodePointIsLetter(letter));
+  /* We look for a child MessageTree that starts with the wanted letter. If we
+   * do not find one, we scroll to the first child MessageTree that starts with
+   * a letter higher than the wanted letter. */
   char lowerLetter = tolower(letter);
-  // We look for a child MessageTree that starts with the wanted letter.
+  int index = -1;
   for (int i = 0; i < m_messageTreeModel->numberOfChildren(); i++) {
-    char currentFirstLetterLowered = tolower(I18n::translate(m_messageTreeModel->children(i)->label())[0]);
-    if (currentFirstLetterLowered == lowerLetter) {
-      scrollToAndSelectChild(i);
-      return;
+    char l = tolower(I18n::translate(m_messageTreeModel->children(i)->label())[0]);
+    if (l == lowerLetter) {
+      index = i;
+      break;
+    }
+    if (index < 0 && l >= lowerLetter && UTF8Helper::CodePointIsLowerCaseLetter(l)) {
+      index = i;
     }
   }
-  // We did not find a child MessageTree that starts with the wanted letter.
-  // We scroll to the first child MessageTree that starts with a letter higher
-  // than the wanted letter.
-  for (int i = 0; i < m_messageTreeModel->numberOfChildren(); i++) {
-    char currentFirstLetterLowered = tolower(I18n::translate(m_messageTreeModel->children(i)->label())[0]);
-    if (currentFirstLetterLowered >= lowerLetter && currentFirstLetterLowered <= 'z') {
-      scrollToAndSelectChild(i);
-      return;
-    }
+  if (index >= 0) {
+    scrollToAndSelectChild(index);
   }
 }
 
diff --git a/apps/code/script.cpp b/apps/code/script.cpp
index 1c97a9083..12a88c976 100644
--- a/apps/code/script.cpp
+++ b/apps/code/script.cpp
@@ -5,8 +5,8 @@ namespace Code {
 
 static inline void intToText(int i, char * buffer, int bufferSize) {
   // We only support integers from 0 to 99.
-  assert(i>=0);
-  assert(i<100);
+  assert(i >= 0);
+  assert(i < 100);
   assert(bufferSize >= 3);
   if (i/10 == 0) {
     buffer[0] = i+'0';
@@ -37,13 +37,6 @@ bool Script::DefaultName(char buffer[], size_t bufferSize) {
   return false;
 }
 
-bool isSmallLetterOrUnderscoreChar(const char c) {
-  return (c >= 'a' && c <= 'z') || c == '_';
-}
-bool isNumberChar(const char c) {
-  return c >= '0' && c <= '9';
-}
-
 bool Script::nameCompliant(const char * name) {
   /* We allow here the empty script name ".py", because it is the name used to
    * create a new empty script. When naming or renaming a script, we check
@@ -53,20 +46,21 @@ bool Script::nameCompliant(const char * name) {
    * We do not allow upper cases in the script names because script names are
    * used in the URLs of the NumWorks workshop website and we do not want
    * problems with case sensitivity. */
-  const char * c = name;
-  if (*c == 0 || (!isSmallLetterOrUnderscoreChar(*c) && *c != '.')) {
+  UTF8Decoder decoder(name);
+  CodePoint c = decoder.nextCodePoint();
+  if (c == UCodePointNull || !(UTF8Helper::CodePointIsLowerCaseLetter(c) || c == '_' || c == '.')) {
     /* The name cannot be empty. Its first letter must be in [a-z_] or the
      * extension dot. */
     return false;
   }
-  while (*c != 0) {
-    if (*c == '.' && strcmp(c+1, ScriptStore::k_scriptExtension) == 0) {
+  while (c != UCodePointNull) {
+    if (c == '.' && strcmp(decoder.stringPosition(), ScriptStore::k_scriptExtension) == 0) {
       return true;
     }
-    if (!isSmallLetterOrUnderscoreChar(*c) && !isNumberChar(*c)) {
+    if (!(UTF8Helper::CodePointIsLowerCaseLetter(c) || c == '_' || UTF8Helper::CodePointIsNumber(c))) {
       return false;
     }
-    c++;
+    c = decoder.nextCodePoint();
   }
   return false;
 }
@@ -86,7 +80,7 @@ void Script::toggleImportationStatus() {
 const char * Script::readContent() const {
   assert(!isNull());
   Data d = value();
-  return (const char *)d.buffer+k_importationStatusSize;
+  return (const char *)d.buffer + k_importationStatusSize;
 }
 
 }
diff --git a/apps/code/variable_box_controller.cpp b/apps/code/variable_box_controller.cpp
index f503f2ba8..674b4f445 100644
--- a/apps/code/variable_box_controller.cpp
+++ b/apps/code/variable_box_controller.cpp
@@ -6,6 +6,7 @@
 #include <assert.h>
 #include <escher/buffer_text_view.h>
 #include <escher/palette.h>
+#include <ion/unicode/utf8_helper.h>
 #include <string.h>
 
 namespace Code {
@@ -41,7 +42,7 @@ static bool shouldAddObject(const char * name, int maxLength) {
     return false;
   }
   assert(name != nullptr);
-  if (name[0] == '_') {
+  if (UTF8Helper::CodePointIs(name, '_')) {
     return false;
   }
   return true;
diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index e517ef379..778a16a89 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -23,6 +23,8 @@ using namespace Shared;
 
 namespace Probability {
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 CalculationController::ContentView::ContentView(SelectableTableView * selectableTableView, Law * law, Calculation * calculation) :
   m_titleView(KDFont::SmallFont, I18n::Message::ComputeProbability, 0.5f, 0.5f, Palette::GreyDark, Palette::WallScreen),
   m_selectableTableView(selectableTableView),
@@ -285,17 +287,17 @@ void CalculationController::updateTitle() {
     if (currentChar >= k_maxNumberOfTitleCharacters) {
       break;
     }
-    const size_t bufferSize = PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits);
+    constexpr size_t bufferSize = PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits);
     char buffer[bufferSize];
-    PrintFloat::convertFloatToText<double>(m_law->parameterValueAtIndex(index), buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits), Constant::ShortNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
+    PrintFloat::convertFloatToText<double>(m_law->parameterValueAtIndex(index), buffer, bufferSize, Constant::ShortNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     strlcpy(m_titleBuffer+currentChar, buffer, k_maxNumberOfTitleCharacters - currentChar);
     currentChar += strlen(buffer);
     if (currentChar >= k_maxNumberOfTitleCharacters) {
       break;
     }
-    m_titleBuffer[currentChar++] = ' ';
+    currentChar += UTF8Decoder::CodePointToChars(' ', m_titleBuffer + currentChar, k_maxNumberOfTitleCharacters - currentChar);
   }
-  m_titleBuffer[currentChar-1] = 0;
+  m_titleBuffer[minInt(currentChar, k_maxNumberOfTitleCharacters) - 1] = 0;
 }
 
 }
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 2c0213b1f..8a7895855 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -127,6 +127,7 @@ void GraphController::reloadBannerView() {
   }
   numberOfChar += strlcpy(buffer, legend, bufferSize);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(x, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
+  assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
   for (int i = numberOfChar; i < k_maxLegendLength; i++) {
     buffer[numberOfChar++] = ' ';
   }
diff --git a/apps/shared/storage_cartesian_function.cpp b/apps/shared/storage_cartesian_function.cpp
index d07eb935d..5bdf59ced 100644
--- a/apps/shared/storage_cartesian_function.cpp
+++ b/apps/shared/storage_cartesian_function.cpp
@@ -4,6 +4,7 @@
 #include <poincare/derivative.h>
 #include <poincare/integral.h>
 #include <escher/palette.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <float.h>
 #include <cmath>
 
@@ -64,16 +65,17 @@ StorageCartesianFunction StorageCartesianFunction::NewModel(Ion::Storage::Record
 }
 
 int StorageCartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg) {
-  // Fill buffer with f(x). Keep one char for derivative sign.
-  int numberOfChars = nameWithArgument(buffer, bufferSize-1, arg);
-  assert(numberOfChars + 1 < bufferSize);
-  char * lastChar = buffer+numberOfChars;
-  do {
-    *(lastChar+1) = *lastChar;
-    lastChar--;
-  } while (*(lastChar+1) != '(' && lastChar >= buffer);
-  *(lastChar+1) = '\'';
-  return numberOfChars+1;
+  // Fill buffer with f(x). Keep one char foderivativeSizer derivative sign.
+  int derivativeSize = UTF8Decoder::CharSizeOfCodePoint('\'');
+  int numberOfChars = nameWithArgument(buffer, bufferSize - derivativeSize, arg);
+  assert(numberOfChars + derivativeSize < bufferSize);
+  char * firstParenthesis = const_cast<char *>(UTF8Helper::CodePointSearch(buffer, '('));
+  if (!UTF8Helper::CodePointIs(firstParenthesis, '(')) {
+    return numberOfChars;
+  }
+  memmove(firstParenthesis + derivativeSize, firstParenthesis, buffer + numberOfChars - firstParenthesis);
+  UTF8Decoder::CodePointToChars('\'', firstParenthesis, derivativeSize);
+  return numberOfChars + derivativeSize;
 }
 
 bool StorageCartesianFunction::displayDerivative() const {
diff --git a/apps/shared/storage_function.cpp b/apps/shared/storage_function.cpp
index 02fa70fd4..3cd65fcbf 100644
--- a/apps/shared/storage_function.cpp
+++ b/apps/shared/storage_function.cpp
@@ -1,7 +1,10 @@
 #include "storage_function.h"
 #include "poincare_helpers.h"
+#include <poincare/serialization_helper.h>
 #include <poincare/symbol.h>
 #include "poincare/src/parsing/parser.h"
+#include <ion/unicode/utf8_helper.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <string.h>
 #include <cmath>
 #include <assert.h>
@@ -14,7 +17,10 @@ constexpr char StorageFunction::k_parenthesedArgument[];
 
 bool StorageFunction::BaseNameCompliant(const char * baseName, NameNotCompliantError * error) {
   assert(baseName[0] != 0);
-  if (baseName[0] >= '0' && baseName[0] <= '9') {
+
+  UTF8Decoder decoder(baseName);
+  CodePoint c = decoder.nextCodePoint();
+  if (UTF8Helper::CodePointIsNumber(c)) {
     // The name cannot start with a number
     if (error != nullptr) {
       *error = NameNotCompliantError::NameCannotStartWithNumber;
@@ -22,21 +28,19 @@ bool StorageFunction::BaseNameCompliant(const char * baseName, NameNotCompliantE
     return false;
   }
 
-  const char * currentChar = baseName;
-
   // The name should only have allowed characters
-  while (*currentChar != 0) {
-    if (!((*currentChar >= 'A' && *currentChar <= 'Z')
-        || (*currentChar >= 'a' && *currentChar <= 'z')
-        || (*currentChar >= '0' && *currentChar <= '9')
-        || *currentChar == '_'))
+  while (c != UCodePointNull) {
+    if (!(UTF8Helper::CodePointIsUpperCaseLetter(c)
+        || UTF8Helper::CodePointIsLowerCaseLetter(c)
+        || UTF8Helper::CodePointIsNumber(c))
+        || c == '_')
     {
       if (error != nullptr) {
         *error = NameNotCompliantError::CharacterNotAllowed;
       }
       return false;
     }
-    currentChar++;
+    c = decoder.nextCodePoint();
   }
 
   // The name should not be a reserved name
@@ -76,7 +80,9 @@ T StorageFunction::templatedApproximateAtAbscissa(T x, Poincare::Context * conte
   if (isCircularlyDefined(context)) {
     return NAN;
   }
-  const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
+  char unknownX[bufferSize];
+  Poincare::SerializationHelper::CodePoint(unknownX, bufferSize, Poincare::Symbol::UnknownX);
   return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(context), unknownX, x, *context);
 }
 
diff --git a/apps/shared/toolbox_helpers.cpp b/apps/shared/toolbox_helpers.cpp
index 6ae393c1d..589615b89 100644
--- a/apps/shared/toolbox_helpers.cpp
+++ b/apps/shared/toolbox_helpers.cpp
@@ -33,45 +33,49 @@ void TextToInsertForCommandMessage(I18n::Message message, char * buffer, int buf
 }
 
 void TextToInsertForCommandText(const char * command, char * buffer, int bufferSize, bool replaceArgsWithEmptyChar) {
-  int currentNewTextIndex = 0;
+  int index = 0;
   int numberOfOpenParentheses = 0;
   int numberOfOpenBrackets = 0;
   bool insideQuote = false;
   bool argumentAlreadyReplaced = false;
-  size_t commandLength = strlen(command);
-  for (size_t i = 0; i < commandLength; i++) {
-    if (command[i] == ')') {
+
+  UTF8Decoder decoder(command);
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != UCodePointNull) {
+    if (codePoint == ')') {
       numberOfOpenParentheses--;
-    }
-    if (command[i] == ']') {
+    } else if (codePoint == ']') {
       numberOfOpenBrackets--;
     }
-    if (((numberOfOpenParentheses == 0 && numberOfOpenBrackets == 0)
-          || command[i] == ','
-          || (numberOfOpenBrackets > 0 && (command[i] == ',' || command[i] == '[' || command[i] == ']')))
-        && (!insideQuote || command[i] == '\'')) {
-      assert(currentNewTextIndex < bufferSize);
+    if ((!insideQuote || codePoint == '\'')
+        && ((numberOfOpenParentheses == 0 && numberOfOpenBrackets == 0)
+          || codePoint == ','
+          || (numberOfOpenBrackets > 0
+            && (codePoint == ','
+              || codePoint == '['
+              || codePoint == ']'))))
+    {
+      assert(index < bufferSize);
       if (argumentAlreadyReplaced) {
         argumentAlreadyReplaced = false;
       }
-      buffer[currentNewTextIndex++] = command[i];
+      index += UTF8Decoder::CodePointToChars(codePoint, buffer + index, bufferSize - index);
     } else {
       if (replaceArgsWithEmptyChar && !argumentAlreadyReplaced) {
-        currentNewTextIndex += UTF8Decoder::CodePointToChars(UCodePointEmpty, buffer + currentNewTextIndex, bufferSize - currentNewTextIndex);
+        index += UTF8Decoder::CodePointToChars(UCodePointEmpty, buffer + index, bufferSize - index);
         argumentAlreadyReplaced = true;
       }
     }
-    if (command[i] == '(') {
+    if (codePoint == '(') {
       numberOfOpenParentheses++;
-    }
-    if (command[i] == '[') {
+    } else if (codePoint == '[') {
       numberOfOpenBrackets++;
-    }
-    if (command[i] == '\'') {
+    } else if (codePoint == '\'') {
       insideQuote = !insideQuote;
     }
+    codePoint = decoder.nextCodePoint();
   }
-  buffer[currentNewTextIndex] = 0;
+  buffer[index] = 0;
 }
 
 }
diff --git a/apps/shared/values_function_parameter_controller.cpp b/apps/shared/values_function_parameter_controller.cpp
index 0bdc5ef90..322155ecb 100644
--- a/apps/shared/values_function_parameter_controller.cpp
+++ b/apps/shared/values_function_parameter_controller.cpp
@@ -14,12 +14,10 @@ ValuesFunctionParameterController::ValuesFunctionParameterController(char symbol
 
 const char * ValuesFunctionParameterController::title() {
   strlcpy(m_pageTitle, I18n::translate(I18n::Message::FunctionColumn), k_maxNumberOfCharsInTitle);
-  for (int currentChar = 0; currentChar < k_maxNumberOfCharsInTitle-1; currentChar++) {
-    if (m_pageTitle[currentChar] == '(') {
-      m_pageTitle[currentChar-1] = *m_function->name();
-      m_pageTitle[currentChar+1] = m_symbol;
-      break;
-    }
+  char * parenthesis = const_cast<char *>(UTF8Helper::CodePointSearch(m_pageTitle, '('));
+  if (UTF8Helper::CodePointIs(parenthesis, '(') && parenthesis > m_pageTitle && parenthesis < m_pageTitle + k_maxNumberOfCharsInTitle) {
+    *(m_pageTitle - 1) = *m_function->name();
+    *(m_pageTitle + 1) = m_symbol;
   }
   return m_pageTitle;
 }
diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index 1f8fc7434..359dc1bc2 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -115,10 +115,8 @@ void ListController::didEnterResponderChain(Responder * previousFirstResponder)
 }
 
 bool textRepresentsAnEquality(const char * text) {
-  if (strchr(text, '=')) {
-    return true;
-  }
-  return false;
+  char equal = '=';
+  return UTF8Helper::CodePointIs(UTF8Helper::CodePointSearch(text, equal), equal);
 }
 
 bool layoutRepresentsAnEquality(Poincare::Layout l) {
diff --git a/apps/statistics/box_controller.cpp b/apps/statistics/box_controller.cpp
index 6d1617018..5d02868a4 100644
--- a/apps/statistics/box_controller.cpp
+++ b/apps/statistics/box_controller.cpp
@@ -51,11 +51,13 @@ void BoxController::reloadBannerView() {
   m_view.editableBannerView()->setMessageAtIndex(calculationName[selectedQuantile], 1);
 
   // Set calculation result
-  char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits) + 1];
+  assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
+  constexpr int bufferSize = PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits) + 1;
+  char buffer[bufferSize];
   CalculPointer calculationMethods[5] = {&Store::minValue, &Store::firstQuartile, &Store::median, &Store::thirdQuartile,
     &Store::maxValue};
   double calculation = (m_store->*calculationMethods[selectedQuantile])(selectedSeriesIndex());
-  int numberOfChar = PoincareHelpers::ConvertFloatToText<double>(calculation, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
+  int numberOfChar = PoincareHelpers::ConvertFloatToText<double>(calculation, buffer, bufferSize - 1, Constant::LargeNumberOfSignificantDigits);
   buffer[numberOfChar++] = ' ';
   buffer[numberOfChar] = 0;
   m_view.editableBannerView()->setLegendAtIndex(buffer, 2);
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index 1bdcd35e5..e8dc3c9dd 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -94,7 +94,7 @@ void HistogramController::reloadBannerView() {
   if (selectedSeriesIndex() < 0) {
     return;
   }
-  const size_t bufferSize = k_maxNumberOfCharacters+ PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)*2;
+  const size_t bufferSize = k_maxNumberOfCharacters + PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)*2;
   char buffer[bufferSize];
   int numberOfChar = 0;
 
@@ -110,18 +110,18 @@ void HistogramController::reloadBannerView() {
     numberOfChar += PoincareHelpers::ConvertFloatToText<double>(lowerBound, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
 
-  buffer[numberOfChar++] = ';';
+  numberOfChar+= UTF8Decoder::CodePointToChars(';', buffer + numberOfChar, bufferSize - numberOfChar);
 
   // Add upper bound
   if (selectedSeriesIndex() >= 0) {
     double upperBound = m_store->endOfBarAtIndex(selectedSeriesIndex(), *m_selectedBarIndex);
     numberOfChar += PoincareHelpers::ConvertFloatToText<double>(upperBound, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
   }
-  buffer[numberOfChar++] = '[';
+  numberOfChar+= UTF8Decoder::CodePointToChars('[', buffer + numberOfChar, bufferSize - numberOfChar);
 
   // Padding
   for (int i = numberOfChar; i < k_maxIntervalLegendLength; i++) {
-    buffer[numberOfChar++] = ' ';
+    numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxIntervalLegendLength] = 0;
   m_view.editableBannerView()->setLegendAtIndex(buffer, 1);
@@ -139,7 +139,7 @@ void HistogramController::reloadBannerView() {
   }
   // Padding
   for (int i = numberOfChar; i < k_maxLegendLength; i++) {
-    buffer[numberOfChar++] = ' ';
+    numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
   m_view.editableBannerView()->setLegendAtIndex(buffer, 3);
@@ -156,7 +156,7 @@ void HistogramController::reloadBannerView() {
   }
   // Padding
   for (int i = numberOfChar; i < k_maxLegendLength; i++) {
-    buffer[numberOfChar++] = ' ';
+    numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
   m_view.editableBannerView()->setLegendAtIndex(buffer, 5);
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 80c919086..24caf7a13 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -200,11 +200,11 @@ bool VariableBoxController::selectLeaf(int selectedRow) {
   if (m_currentPage == Page::Function) {
     // Add parentheses to a function name
     assert(nameLength < nameToHandleMaxSize);
-    nameToHandle[nameLength++] = '(';
+    nameLength += UTF8Decoder::CodePointToChars('(', nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
     assert(nameLength < nameToHandleMaxSize);
     nameLength+= UTF8Decoder::CodePointToChars(UCodePointEmpty, nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
     assert(nameLength < nameToHandleMaxSize);
-    nameToHandle[nameLength++] = ')';
+    nameLength += UTF8Decoder::CodePointToChars(')', nameToHandle+nameLength, nameToHandleMaxSize - nameLength);
     assert(nameLength < nameToHandleMaxSize);
     nameToHandle[nameLength] = 0;
   }
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index b23104808..9e41714d9 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -192,10 +192,12 @@ void TextArea::Text::insertSpacesAtLocation(int numberOfSpaces, char * location)
   assert(strlen(m_buffer) + numberOfSpaces < m_bufferSize);
 
   size_t sizeToMove = strlen(location) + 1;
-  assert(location + numberOfSpaces + sizeToMove <= m_buffer + m_bufferSize);
-  memmove(location + numberOfSpaces, location, sizeToMove);
+  size_t spaceCharSize = UTF8Decoder::CharSizeOfCodePoint(' ');
+  size_t spacesSize = numberOfSpaces * spaceCharSize;
+  assert(location + spacesSize + sizeToMove <= m_buffer + m_bufferSize);
+  memmove(location + spacesSize, location, sizeToMove);
   for (int i = 0; i < numberOfSpaces; i++) {
-    *(location+i) = ' ';
+    UTF8Decoder::CodePointToChars(' ', location+i*spaceCharSize, (m_buffer + m_bufferSize) - location);
   }
 }
 
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index ffc37f38d..4a7f27985 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -13,6 +13,10 @@ int CountOccurrences(const char * s, CodePoint c);
  * null terminating char otherwise. */
 const char * CodePointSearch(const char * s, CodePoint c);
 
+/* Returns the first occurence of a code point that is not c in a string,
+ * stopping at the null-terminating char or the start of string. */
+const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft, const char * initialPosition);
+
 /* Copy src into dst while removing all code points c. Also update an index
  * that should be lower if code points where removed before it. Ensure null-
  * termination of dst. */
@@ -28,24 +32,29 @@ size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoin
  * done for *(initial position) even if it matches c.
  * The return value is the first address for which we did not perform an action.
  *
+ *                                         r = return value
  *                                         x = actionCodePoint is performed
  *                                         o = actionOtherCodePoint is performed
  * Going right == true:                    s = stoppingCodePoint
  *     o  o  o  o  x  x  o  o  x  o
  *    |  |  |  |  |c |c |  |  |c |  |s |  |  |c |
- *    ^start of string
+ *    ^start of string              ^r
  *
  * Going right == false:
- *     o  o  o  o  x  x  o  o
- *    |  |c |  |s |c |c |  |  |c |  |  |c |  |  |
- *    ^start of string        ^initialPosition
+ *                          x  x  o  o
+ *    |  |c |  |  |c |  |s |c |c |  |  |c |  |  |
+ *    ^start of string  ^r             ^initialPosition
  *
  * */
 typedef void (*CodePointAction)(int codePointOffset, void * contextPointer, int contextInt);
-const char *  PerformAtCodePoints(const char * string, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint = UCodePointNull, bool goingRight = true, const char * initialPosition = nullptr);
+const char * PerformAtCodePoints(const char * string, CodePoint c, CodePointAction actionCodePoint, CodePointAction actionOtherCodePoint, void * contextPointer, int contextInt, CodePoint stoppingCodePoint = UCodePointNull, bool goingRight = true, const char * initialPosition = nullptr);
 
 bool PreviousCodePointIs(const char * buffer, const char * location, CodePoint c);
 bool CodePointIs(const char * location, CodePoint c);
+bool CodePointIsLetter(CodePoint c);
+bool CodePointIsLowerCaseLetter(CodePoint c);
+bool CodePointIsUpperCaseLetter(CodePoint c);
+bool CodePointIsNumber(CodePoint c);
 
 // Shift the buffer and return the number of bytes removed.
 int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c);
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 32c2cba58..2123229bc 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -54,6 +54,32 @@ const char * CodePointSearch(const char * s, CodePoint c) {
   return currentPointer;
 }
 
+const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft, const char * initialPosition) {
+  if (goingLeft) {
+    assert(initialPosition != nullptr);
+    if (initialPosition == s) {
+      return s;
+    }
+    UTF8Decoder decoder(s, initialPosition);
+    CodePoint codePoint = decoder.previousCodePoint();
+    const char * codePointPointer = decoder.stringPosition();
+    while (codePointPointer > s && codePoint == c) {
+      codePoint = decoder.previousCodePoint();
+      codePointPointer = decoder.stringPosition();
+    }
+    return codePointPointer;
+  }
+  assert(!goingLeft && initialPosition == nullptr);
+  UTF8Decoder decoder(s);
+  const char * codePointPointer = decoder.stringPosition();
+  CodePoint codePoint = decoder.nextCodePoint();
+  while (codePoint != UCodePointNull && codePoint == c) {
+    codePointPointer = decoder.stringPosition();
+    codePoint = decoder.nextCodePoint();
+  }
+  return codePointPointer;
+}
+
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * pointerToUpdate) {
   if (dstSize <= 0) {
     return;
@@ -189,6 +215,22 @@ bool CodePointIs(const char * location, CodePoint c) {
   return decoder.nextCodePoint() == c;
 }
 
+bool CodePointIsLetter(CodePoint c) {
+  return CodePointIsLowerCaseLetter(c) || CodePointIsUpperCaseLetter(c);
+}
+
+bool CodePointIsLowerCaseLetter(CodePoint c) {
+  return c >= 'a' && c <= 'z';
+}
+
+bool CodePointIsUpperCaseLetter(CodePoint c) {
+  return c >= 'A' && c <= 'Z';
+}
+
+bool CodePointIsNumber(CodePoint c) {
+  return c >= '0' && c <= '9';
+}
+
 int RemovePreviousCodePoint(const char * text, char * location, CodePoint * c) {
   assert(c != nullptr);
   if (location <= text) {
diff --git a/poincare/src/integral_layout.cpp b/poincare/src/integral_layout.cpp
index d6962dcc8..d156508bb 100644
--- a/poincare/src/integral_layout.cpp
+++ b/poincare/src/integral_layout.cpp
@@ -169,8 +169,7 @@ int IntegralLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   for (uint8_t i = 0; i < sizeof(argLayouts)/sizeof(argLayouts[0]); i++) {
     if (i != 0) {
       // Write the comma
-      buffer[numberOfChar++] = ',';
-      numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
+      numberOfChar += SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, ',');
       if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
     }
 

From a7e7319e4e61d04ffff290d3860bcd0053da4fc5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 29 Jan 2019 17:39:46 +0100
Subject: [PATCH 072/295] [ion/storage] fix use of unicode method

---
 ion/src/shared/storage.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ion/src/shared/storage.cpp b/ion/src/shared/storage.cpp
index e2b61ed72..e9ca40a02 100644
--- a/ion/src/shared/storage.cpp
+++ b/ion/src/shared/storage.cpp
@@ -422,7 +422,7 @@ bool Storage::FullNameCompliant(const char * fullName) {
   if (*dotChar == 0) {
     return false;
   }
-  if (UTF8Helper::CodePointSearch(dotChar+1, k_dotChar) == 0) {
+  if (*(UTF8Helper::CodePointSearch(dotChar+1, k_dotChar)) == 0) {
     return true;
   }
   return false;

From 699f6e218d10a2cbcae8bca586873fc332c0a40a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 30 Jan 2019 10:16:21 +0100
Subject: [PATCH 073/295] [poincare] Fix printFloat buffer legnths.

Some code points are not 1 byte long.
---
 poincare/include/poincare/print_float.h | 45 ++++++++++++++++---------
 1 file changed, 30 insertions(+), 15 deletions(-)

diff --git a/poincare/include/poincare/print_float.h b/poincare/include/poincare/print_float.h
index 26dfb0a2d..7c7472348 100644
--- a/poincare/include/poincare/print_float.h
+++ b/poincare/include/poincare/print_float.h
@@ -8,10 +8,16 @@ namespace Poincare {
 
 class Integer;
 
+
 namespace PrintFloat {
+  // × and · are 2 bytes long, ᴇ and ℯ are 3 bytes long, 𝐢is 4 bytes long.
+  constexpr static int k_multiplicationCodePointByteLength = 2;
+  constexpr static int k_specialECodePointByteLength = 3;
+  constexpr static int k_iComplexCodePointByteLength = 4;
+
   constexpr static int bufferSizeForFloatsWithPrecision(int numberOfSignificantDigits) {
-    // The worst case is -1.234E-328
-    return numberOfSignificantDigits + 8;
+    // The worst case is -1.234ᴇ-328
+    return 2+numberOfSignificantDigits+k_specialECodePointByteLength+1+3+1;
   }
   /* This function prints the integer i in the buffer with a '.' at the position
    * specified by the decimalMarkerPosition. It starts printing at the end of the
@@ -29,21 +35,30 @@ namespace PrintFloat {
 
   /* We here define the buffer size to write the lengthest float possible.
    * At maximum, the number has 15 significant digits so, in the worst case it
-   * has the form -1.99999999999999e-308 (15+7+1 char) (the auto mode is always
-   * shorter. */
-  constexpr static int k_maxFloatBufferLength = k_numberOfStoredSignificantDigits+7+1;
-  /* We here define the buffer size to write the lengthest complex possible.
-   * The worst case has the form
-   * -1.99999999999999e-308*e^(-1.99999999999999e-308*i) (14+14+7+1 char) */
-  constexpr static int k_maxComplexBufferLength = k_maxFloatBufferLength-1+k_maxFloatBufferLength-1+7+1;
+   * has the form -1.99999999999999ᴇ-308 (2+15+3+1+3 char) (the auto mode is
+   * always shorter. */
+  constexpr static int k_maxFloatBufferLength = 2+k_numberOfStoredSignificantDigits+k_specialECodePointByteLength+1+3+1;
+  /* We here define the buffer size to write the longest complex possible. The
+   * worst case has the form
+   * -1.99999999999999ᴇ-308*ℯ^(-1.99999999999999ᴇ-308*𝐢) */
+  constexpr static int k_maxComplexBufferLength =
+    (k_maxFloatBufferLength-1)
+    + k_multiplicationCodePointByteLength
+    + k_specialECodePointByteLength
+    + 2 // Exponent + opening parenthesis
+    + (k_maxFloatBufferLength-1)
+    + k_multiplicationCodePointByteLength
+    + k_iComplexCodePointByteLength
+    + 1 // Closing parenthesis
+    + 1; // Null-terminating char
 
   /* If the buffer size is too small to display the right number of significant
-   * digits, the function forces the scientific mode and cap the number of
-   * significant digits to fit the buffer. If the buffer is too small to
-   * display any float, the text representing the float is truncated at the end
-   * of the buffer.
-   * ConvertFloatToText return the number of characters that have been written
-   * in buffer (excluding the last \O character) */
+   * digits, the function forces the scientific mode and caps the number of
+   * significant digits to fit the buffer. If the buffer is too small to display
+   * any float, the text representing the float is truncated at the end of the
+   * buffer.
+   * ConvertFloatToText returns the number of characters that have been written
+   * in buffer (excluding the last \0 character). */
   template <class T>
   int convertFloatToText(T d, char * buffer, int bufferSize, int numberOfSignificantDigits, Preferences::PrintFloatMode mode, bool allowRounding = true);
   template <class T>

From 3038073d3bacecb1a6c262729608debecb61a7b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9o=20Sol=C3=A9?= <leo.sole@numworks.com>
Date: Wed, 30 Jan 2019 11:57:09 +0100
Subject: [PATCH 074/295] [unicode] Add accents in french litterals

---
 apps/code/base.fr.i18n        |  4 ++--
 apps/code/catalog.fr.i18n     |  4 ++--
 apps/graph/base.fr.i18n       | 18 ++++++++--------
 apps/on_boarding/base.fr.i18n |  8 +++----
 apps/probability/base.fr.i18n | 18 ++++++++--------
 apps/regression/base.fr.i18n  | 12 +++++------
 apps/sequence/base.fr.i18n    | 12 +++++------
 apps/settings/base.fr.i18n    | 20 +++++++++---------
 apps/shared.fr.i18n           | 40 +++++++++++++++++------------------
 apps/solver/base.fr.i18n      | 12 +++++------
 apps/statistics/base.fr.i18n  | 20 +++++++++---------
 apps/toolbox.fr.i18n          | 26 +++++++++++------------
 apps/usb/base.fr.i18n         |  8 +++----
 13 files changed, 101 insertions(+), 101 deletions(-)

diff --git a/apps/code/base.fr.i18n b/apps/code/base.fr.i18n
index 876bac18c..253989ab2 100644
--- a/apps/code/base.fr.i18n
+++ b/apps/code/base.fr.i18n
@@ -1,7 +1,7 @@
-Console = "Console d'execution"
+Console = "Console d'exécution"
 AddScript = "Ajouter un script"
 ScriptOptions = "Options de script"
-ExecuteScript = "Executer le script"
+ExecuteScript = "Exécuter le script"
 AutoImportScript = "Importation auto dans la console"
 DeleteScript = "Supprimer le script"
 FunctionsAndVariables = "Fonctions et variables"
diff --git a/apps/code/catalog.fr.i18n b/apps/code/catalog.fr.i18n
index 30a6247b1..cdc0899ad 100644
--- a/apps/code/catalog.fr.i18n
+++ b/apps/code/catalog.fr.i18n
@@ -79,8 +79,8 @@ PythonPower = "x à la puissance y"
 PythonPrint = "Affiche l'objet"
 PythonRadians = "Conversion de degrés en radians"
 PythonRandint = "Entier aléatoire dans [a,b]"
-PythonRandom = "Nombre decimal dans [0,1["
-PythonRandomFunction = "Prefixe fonction du module random"
+PythonRandom = "Nombre décimal dans [0,1["
+PythonRandomFunction = "Préfixe fonction du module random"
 PythonRandrange = "Nombre dans range(start, stop)"
 PythonRangeStartStop = "Liste de start à stop-1"
 PythonRangeStop = "Liste de 0 à stop-1"
diff --git a/apps/graph/base.fr.i18n b/apps/graph/base.fr.i18n
index 4d3a06807..6dd75e4ea 100644
--- a/apps/graph/base.fr.i18n
+++ b/apps/graph/base.fr.i18n
@@ -5,19 +5,19 @@ AddFunction = "Ajouter une fonction"
 DeleteFunction = "Supprimer la fonction"
 FunctionColor = "Couleur de la fonction"
 NoFunction = "Aucune fonction"
-NoActivatedFunction = "Aucune fonction activee"
+NoActivatedFunction = "Aucune fonction activée"
 PlotOptions = "Options de la courbe"
 Compute = "Calculer"
-Zeros = "Zeros"
+Zeros = "Zéros"
 Tangent = "Tangente"
 Intersection = "Intersection"
-SelectLowerBound = "Selectionner la borne inferieure"
-SelectUpperBound = "Selectionner la borne superieure"
-NoMaximumFound = "Aucun maximum trouve"
-NoMinimumFound = "Aucun minimum trouve"
-NoZeroFound = "Aucun zero trouve"
+SelectLowerBound = "Selectionner la borne inférieure"
+SelectUpperBound = "Selectionner la borne supérieure"
+NoMaximumFound = "Aucun maximum trouvé"
+NoMinimumFound = "Aucun minimum trouvé"
+NoZeroFound = "Aucun zéro trouvé"
 NoIntersectionFound = "Aucune intersection trouvée"
-DerivativeFunctionColumn = "Colonne de la fonction derivee"
-HideDerivativeColumn = "Masquer la fonction derivee"
+DerivativeFunctionColumn = "Colonne de la fonction derivée"
+HideDerivativeColumn = "Masquer la fonction derivée"
 AllowedCharactersAZaz09 = "Caractères autorisés : A-Z, a-z, 0-9, _"
 ReservedName = "Nom réservé"
diff --git a/apps/on_boarding/base.fr.i18n b/apps/on_boarding/base.fr.i18n
index 597435cae..fdd2dca84 100644
--- a/apps/on_boarding/base.fr.i18n
+++ b/apps/on_boarding/base.fr.i18n
@@ -1,10 +1,10 @@
-UpdateAvailable = "MISE A JOUR DISPONIBLE"
-UpdateMessage1 = "Des ameliorations importantes existent"
+UpdateAvailable = "MISE À JOUR DISPONIBLE"
+UpdateMessage1 = "Des améliorations importantes existent"
 UpdateMessage2 = "pour votre calculatrice."
 UpdateMessage3 = "Connectez-vous depuis votre ordinateur"
 UpdateMessage4 = "www.numworks.com/update"
-BetaVersion = "VERSION BETA"
-BetaVersionMessage1 = "Votre appareil dispose d'une version beta"
+BetaVersion = "VERSION BÊTA"
+BetaVersionMessage1 = "Votre appareil dispose d'une version bêta"
 BetaVersionMessage2 = "du logiciel. Il est possible que certains"
 BetaVersionMessage3 = "bugs apparaissent."
 BetaVersionMessage4 = "Vous pouvez nous écrire pour nous"
diff --git a/apps/probability/base.fr.i18n b/apps/probability/base.fr.i18n
index 7b8a19afb..500ab370d 100644
--- a/apps/probability/base.fr.i18n
+++ b/apps/probability/base.fr.i18n
@@ -1,5 +1,5 @@
-ProbaApp = "Probabilites"
-ProbaAppCapital = "PROBABILITES"
+ProbaApp = "Probabilités"
+ProbaAppCapital = "PROBABILITÉS"
 ChooseLaw = "Choisir le type de loi"
 Binomial = "Binomiale"
 Uniforme = "Uniforme"
@@ -11,12 +11,12 @@ UniformLaw = "Loi uniforme"
 ExponentialLaw = "Loi exponentielle"
 NormalLaw = "Loi normale"
 PoissonLaw = "Loi de Poisson"
-ChooseParameters = "Choisir les parametres"
-RepetitionNumber = "n : Nombre de repetitions"
-SuccessProbability = "p : Probabilite de succes"
+ChooseParameters = "Choisir les paramètres"
+RepetitionNumber = "n : Nombre de répétitions"
+SuccessProbability = "p : Probabilité de succès"
 IntervalDefinition = "[a,b] : Intervalle"
-LambdaExponentialDefinition = "λ : Parametre"
+LambdaExponentialDefinition = "λ : Paramètre"
 MeanDefinition = "µ : Espérance ou moyenne"
-DeviationDefinition = "σ : Ecart type"
-LambdaPoissonDefinition = "λ : Parametre"
-ComputeProbability = "Calculer les probabilites"
+DeviationDefinition = "σ : Écart type"
+LambdaPoissonDefinition = "λ : Paramètre"
+ComputeProbability = "Calculer les probabilités"
diff --git a/apps/regression/base.fr.i18n b/apps/regression/base.fr.i18n
index dae5817a5..0e6d2584a 100644
--- a/apps/regression/base.fr.i18n
+++ b/apps/regression/base.fr.i18n
@@ -1,11 +1,11 @@
-RegressionApp = "Regressions"
-RegressionAppCapital = "REGRESSIONS"
-Regression = "Regression"
+RegressionApp = "Régressions"
+RegressionAppCapital = "RÉGRESSIONS"
+Regression = "Régression"
 Reg = "reg"
 MeanDot = "moyen"
-RegressionCurve = "Courbe de regression"
-XPrediction = "Prediction sachant X"
-YPrediction = "Prediction sachant Y"
+RegressionCurve = "Courbe de régression"
+XPrediction = "Prédiction sachant X"
+YPrediction = "Prédiction sachant Y"
 ValueNotReachedByRegression = "Valeur non atteinte dans cette fenêtre"
 NumberOfDots = "Nombre de points"
 Covariance = "Covariance"
diff --git a/apps/sequence/base.fr.i18n b/apps/sequence/base.fr.i18n
index e72575185..3772efb47 100644
--- a/apps/sequence/base.fr.i18n
+++ b/apps/sequence/base.fr.i18n
@@ -5,18 +5,18 @@ AddSequence = "Ajouter une suite"
 ChooseSequenceType = "Choisir le type de suite"
 SequenceType = "Type de suite"
 Explicit = "Explicite"
-SingleRecurrence = "Recurrente d'ordre 1"
-DoubleRecurrence = "Recurrente d'ordre 2"
+SingleRecurrence = "Récurrente d'ordre 1"
+DoubleRecurrence = "Récurrente d'ordre 2"
 SequenceOptions = "Options de la suite"
 SequenceColor = "Couleur de la suite"
 DeleteSequence = "Supprimer la suite"
 NoSequence = "Aucune suite"
-NoActivatedSequence = "Aucune suite activee"
-NStart = "N debut"
+NoActivatedSequence = "Aucune suite activée"
+NStart = "N début"
 NEnd = "N fin"
 TermSum = "Somme des termes"
-SelectFirstTerm = "Selectionner le premier terme "
-SelectLastTerm = "Selectionner le dernier terme "
+SelectFirstTerm = "Sélectionner le premier terme "
+SelectLastTerm = "Sélectionner le dernier terme "
 ValueNotReachedBySequence = "Valeur non atteinte par la suite"
 NColumn = "Colonne n"
 FirstTermIndex = "Indice premier terme"
diff --git a/apps/settings/base.fr.i18n b/apps/settings/base.fr.i18n
index c2d22b74a..c76912acc 100644
--- a/apps/settings/base.fr.i18n
+++ b/apps/settings/base.fr.i18n
@@ -1,7 +1,7 @@
-SettingsApp = "Parametres"
-SettingsAppCapital = "PARAMETRES"
-AngleUnit = "Unite d'angle"
-DisplayMode = "Format resultat"
+SettingsApp = "Paramètres"
+SettingsAppCapital = "PARAMÈTRES"
+AngleUnit = "Unité d'angle"
+DisplayMode = "Format résultat"
 EditionMode = "Format écriture"
 EditionLinear = "En ligne "
 Edition2D = "Naturelle "
@@ -9,17 +9,17 @@ ComplexFormat = "Forme complexe"
 ExamMode = "Mode examen"
 ActivateExamMode = "Activer le mode examen"
 ExamModeActive = "Mode examen: actif"
-About = "A propos"
-Degres = "Degres "
+About = "À propos"
+Degres = "Degrés "
 Radian = "Radians "
-Decimal = "Decimal "
+Decimal = "Décimal "
 Scientific = "Scientifique "
 SignificantFigures = "Chiffres significatifs "
 Real = "Réel "
 Cartesian = "Algébrique "
 Polar = "Exponentielle "
-Brightness = "Luminosite"
+Brightness = "Luminosité"
 SoftwareVersion = "Version du logiciel"
-SerialNumber = "Numero serie"
-UpdatePopUp = "Rappel mise a jour"
+SerialNumber = "Numéro serie"
+UpdatePopUp = "Rappel mise à jour"
 BetaPopUp = "Rappel version bêta"
diff --git a/apps/shared.fr.i18n b/apps/shared.fr.i18n
index df664c364..e89d81161 100644
--- a/apps/shared.fr.i18n
+++ b/apps/shared.fr.i18n
@@ -1,6 +1,6 @@
-ActivateDeactivate = "Activer/Desactiver"
-ActiveExamModeMessage1 = "Toutes vos donnees seront "
-ActiveExamModeMessage2 = "supprimees si vous activez "
+ActivateDeactivate = "Activer/Désactiver"
+ActiveExamModeMessage1 = "Toutes vos données seront "
+ActiveExamModeMessage2 = "supprimées si vous activez "
 ActiveExamModeMessage3 = "le mode examen."
 Axis = "Axes"
 Cancel = "Annuler"
@@ -8,8 +8,8 @@ ClearColumn = "Effacer la colonne"
 ColumnOptions = "Options de la colonne"
 CopyColumnInList = "Copier la colonne dans une liste"
 DataNotSuitable = "Les données ne conviennent pas"
-DataTab = "Donnees"
-DefaultSetting = "Reglages de base"
+DataTab = "Données"
+DefaultSetting = "Réglages de base"
 Deg = "deg"
 Deviation = "Variance"
 DisplayValues = "Afficher les valeurs"
@@ -20,49 +20,49 @@ FillWithFormula = "Remplir avec une formule"
 ForbiddenValue = "Valeur interdite"
 FunctionColumn = "Colonne 0(0)"
 FunctionOptions = "Options de la fonction"
-Goto = "Aller a"
+Goto = "Aller à"
 GraphTab = "Graphique"
 HardwareTestLaunch1 = "Vous allez lancer le test usine."
 HardwareTestLaunch2 = "Pour en sortir vous devrez"
 HardwareTestLaunch3 = "effectuer un reset qui supprimera"
-HardwareTestLaunch4 = "vos donnees."
+HardwareTestLaunch4 = "vos données."
 Initialization = "Initialisation"
-IntervalSet = "Regler l'intervalle"
+IntervalSet = "Régler l'intervalle"
 Language = "Langue"
 LowBattery = "Batterie faible"
 Mean = "Moyenne"
-Move = " Deplacer : "
+Move = " Déplacer : "
 NameCannotStartWithNumber = "Un nom ne peut pas commencer par un chiffre"
 NameTaken = "Ce nom est déjà utilisé"
 NameTooLong = "Ce nom est trop long"
 Next = "Suivant"
-NoDataToPlot = "Aucune donnee a tracer"
-NoFunctionToDelete = "Pas de fonction a supprimer"
-NoValueToCompute = "Aucune grandeur a calculer"
+NoDataToPlot = "Aucune donnée à tracer"
+NoFunctionToDelete = "Pas de fonction à supprimer"
+NoValueToCompute = "Aucune grandeur à calculer"
 Ok = "Valider"
 Or = " ou "
-Orthonormal = "Orthonorme"
+Orthonormal = "Orthonormé"
 Plot = "Tracer le graphique"
 PoolMemoryFull1 = "La mémoire de travail est pleine."
 PoolMemoryFull2 = "Réessayez."
 Rad = "rad"
 Rename = "Renommer"
-RoundAbscissa = "Abscisses entieres"
+RoundAbscissa = "Abscisses entières"
 Sci = "sci/"
-SquareSum = "Somme des carres"
-StandardDeviation = "Ecart type"
+SquareSum = "Somme des carrés"
+StandardDeviation = "Écart type"
 StatTab = "Stats"
 Step = "Pas"
 StorageMemoryFull1 = "La mémoire est pleine."
 StorageMemoryFull2 = "Effacez des données et réessayez."
 StoreExpressionNotAllowed = "'store' n'est pas autorisé"
-SyntaxError = "Attention a la syntaxe"
+SyntaxError = "Attention à la syntaxe"
 ToZoom = "Zoomer : "
-Trigonometric = "Trigonometrique"
-UndefinedValue = "Valeur non definie"
+Trigonometric = "Trigonométrique"
+UndefinedValue = "Valeur non définie"
 ValueNotReachedByFunction = "Valeur non atteinte par la fonction"
 ValuesTab = "Tableau"
 Warning = "Attention"
 XEnd = "X fin"
-XStart = "X debut"
+XStart = "X début"
 Zoom = "Zoom"
diff --git a/apps/solver/base.fr.i18n b/apps/solver/base.fr.i18n
index def88cd86..c23428889 100644
--- a/apps/solver/base.fr.i18n
+++ b/apps/solver/base.fr.i18n
@@ -1,22 +1,22 @@
-SolverApp = "Equations"
-SolverAppCapital = "EQUATIONS"
+SolverApp = "Équations"
+SolverAppCapital = "ÉQUATIONS"
 AddEquation = "Ajouter une équation"
 ResolveEquation = "Résoudre l'équation"
 ResolveSystem = "Résoudre le système"
 UseEquationModel = "Utiliser un modèle d'équation"
 RequireEquation = "L'entrée doit être une équation"
-UndefinedEquation = "Une equation est indéfinie"
-UnrealEquation = "Une equation n'est pas réelle"
+UndefinedEquation = "Une équation est indéfinie"
+UnrealEquation = "Une équation n'est pas réelle"
 TooManyVariables = "Le nombre d'inconnues est trop grand"
 NonLinearSystem = "Le système n'est pas linéaire"
 Solution = "Solution"
 ApproximateSolution = "Solution approchée"
 SearchInverval = "Intervalle de recherche"
-NoSolutionSystem = "Le systeme n'admet aucune solution"
+NoSolutionSystem = "Le système n'admet aucune solution"
 NoSolutionEquation = "L'équation n'admet aucune solution"
 NoSolutionInterval = "Aucune solution trouvée dans cet intervalle"
 EnterEquation = "Entrez une équation"
-InfiniteNumberOfSolutions = "Le systeme admet une infinite de solutions"
+InfiniteNumberOfSolutions = "Le système admet une infinité de solutions"
 ApproximateSolutionIntervalInstruction0= "Entrez l'intervalle dans lequel"
 ApproximateSolutionIntervalInstruction1= "rechercher une solution approchée"
 OnlyFirstSolutionsDisplayed0 = "Seulement les 10 premières"
diff --git a/apps/statistics/base.fr.i18n b/apps/statistics/base.fr.i18n
index 1f4a6ee5d..f90b4d60b 100644
--- a/apps/statistics/base.fr.i18n
+++ b/apps/statistics/base.fr.i18n
@@ -1,7 +1,7 @@
 StatsApp = "Statistiques"
 StatsAppCapital = "STATISTIQUES"
 HistogramTab = "Histogramme"
-BoxTab = "Boite"
+BoxTab = "Boîte"
 Values1 = "Valeurs V1"
 Values2 = "Valeurs V2"
 Values3 = "Valeurs V3"
@@ -11,15 +11,15 @@ Sizes3 = "Effectifs N3"
 ImportList = "Importer une liste"
 Interval = " Intervalle "
 Size = " Effectif"
-Frequency = "Frequence"
-HistogramSet = "Reglage de l'histogramme"
+Frequency = "Fréquence"
+HistogramSet = "Réglage de l'histogramme"
 RectangleWidth = "Largeur des rectangles"
-BarStart = "Debut de la serie"
+BarStart = "Début de la série"
 FirstQuartile = "Premier quartile"
-Median = "Mediane"
-ThirdQuartile = "Troisieme quartile"
+Median = "Médiane"
+ThirdQuartile = "Troisième quartile"
 TotalSize = "Effectif total"
-Range = "Etendue"
-StandardDeviationSigma = "Ecart type"
-SampleStandardDeviationS = "Ecart type echantillon"
-InterquartileRange = "Ecart interquartile"
+Range = "Étendue"
+StandardDeviationSigma = "Écart type"
+SampleStandardDeviationS = "Écart type échantillon"
+InterquartileRange = "Écart interquartile"
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index bcbdec13a..8e6f65246 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -1,25 +1,25 @@
 Toolbox = "Toolbox"
 AbsoluteValue = "Valeur absolue"
-NthRoot = "Racine n-ieme"
+NthRoot = "Racine n-ième"
 BasedLogarithm = "Logarithme base a"
 Calculation = "Calculs"
 ComplexNumber = "Nombres complexes"
-Probability = "Denombrement"
-Arithmetic = "Arithmetique"
+Probability = "Dénombrement"
+Arithmetic = "Arithmétique"
 Matrices = "Matrices"
 NewMatrix = "Nouvelle matrice"
 Lists = "Listes"
-HyperbolicTrigonometry = "Trigonometrie hyperbolique"
+HyperbolicTrigonometry = "Trigonométrie hyperbolique"
 Fluctuation = "Intervalle fluctuation"
-DerivateNumber = "Nombre derive"
-Integral = "Integrale"
+DerivateNumber = "Nombre derivé"
+Integral = "Intégrale"
 Sum = "Somme"
 Product = "Produit"
 ComplexAbsoluteValue = "Module"
 Agument = "Argument"
-RealPart = "Partie reelle"
+RealPart = "Partie réelle"
 ImaginaryPart = "Partie imaginaire"
-Conjugate = "Conjugue"
+Conjugate = "Conjugué"
 Combination = "k parmi n"
 Permutation = "Arrangement"
 GreatCommonDivisor = "PGCD"
@@ -27,15 +27,15 @@ LeastCommonMultiple = "PPCM"
 Remainder = "Reste division p par q"
 Quotient = "Quotient division p par q"
 Inverse = "Inverse"
-Determinant = "Determinant"
-Transpose = "Transposee"
+Determinant = "Déterminant"
+Transpose = "Transposée"
 Trace = "Trace "
 Dimension = "Taille"
 Sort = "Tri croissant"
-InvSort = "Tri decroissant"
+InvSort = "Tri décroissant"
 Maximum = "Maximum"
 Minimum = "Minimum"
-Floor = "Partie entiere"
+Floor = "Partie entière"
 FracPart = "Partie fractionnaire"
 Ceiling = "Plafond"
 Rounding = "Arrondi n chiffres"
@@ -49,6 +49,6 @@ Prediction95 = "Intervalle fluctuation 95% (Term)"
 Prediction = "Intervalle fluctuation simple (2de)"
 Confidence = "Intervalle confiance"
 RandomAndApproximation = "Aléatoire et approximation"
-RandomFloat = "Nombre decimal dans [0,1["
+RandomFloat = "Nombre décimal dans [0,1["
 RandomInteger = "Entier aléatoire dans [a,b]"
 PrimeFactorDecomposition = "Décomposition en facteurs premiers"
diff --git a/apps/usb/base.fr.i18n b/apps/usb/base.fr.i18n
index 3607069cc..5f821d5c4 100644
--- a/apps/usb/base.fr.i18n
+++ b/apps/usb/base.fr.i18n
@@ -1,7 +1,7 @@
-USBConnected = "LA CALCULATRICE EST CONNECTEE"
-ConnectedMessage1 = "Pour transferer des donnees, connectez-"
+USBConnected = "LA CALCULATRICE EST CONNECTÉE"
+ConnectedMessage1 = "Pour transférer des données, connectez-"
 ConnectedMessage2 = "vous depuis votre ordinateur sur le site"
 ConnectedMessage3 = "workshop.numworks.com"
 ConnectedMessage4 = "Appuyez sur la touche RETOUR de la"
-ConnectedMessage5 = "calculatrice ou debranchez-la pour la"
-ConnectedMessage6 = "deconnecter."
+ConnectedMessage5 = "calculatrice ou débranchez-la pour la"
+ConnectedMessage6 = "déconnecter."

From e74c5f803933861c4518ca94ecdf78c7ddb72612 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9o=20Sol=C3=A9?= <leo.sole@numworks.com>
Date: Wed, 30 Jan 2019 13:47:43 +0100
Subject: [PATCH 075/295] [unicode] Fix Spanish literals

---
 apps/calculation/base.es.i18n |  4 +--
 apps/code/base.es.i18n        |  2 +-
 apps/graph/base.es.i18n       | 22 ++++++++---------
 apps/on_boarding/base.es.i18n |  4 +--
 apps/probability/base.es.i18n | 24 +++++++++---------
 apps/regression/base.es.i18n  | 24 +++++++++---------
 apps/sequence/base.es.i18n    | 30 +++++++++++------------
 apps/settings/base.es.i18n    | 14 +++++------
 apps/shared.es.i18n           | 24 +++++++++---------
 apps/solver/base.es.i18n      |  2 +-
 apps/statistics/base.es.i18n  | 12 ++++-----
 apps/toolbox.es.i18n          | 46 +++++++++++++++++------------------
 apps/usb/base.es.i18n         |  8 +++---
 13 files changed, 108 insertions(+), 108 deletions(-)

diff --git a/apps/calculation/base.es.i18n b/apps/calculation/base.es.i18n
index 77fde7917..1b4b273ee 100644
--- a/apps/calculation/base.es.i18n
+++ b/apps/calculation/base.es.i18n
@@ -1,2 +1,2 @@
-CalculApp = "Calculo"
-CalculAppCapital = "CALCULO"
+CalculApp = "Cálculo"
+CalculAppCapital = "CÁLCULO"
diff --git a/apps/code/base.es.i18n b/apps/code/base.es.i18n
index 1f6fc5aaf..4e4860fe4 100644
--- a/apps/code/base.es.i18n
+++ b/apps/code/base.es.i18n
@@ -2,7 +2,7 @@ Console = "Interprete de comandos"
 AddScript = "Agregar un archivo"
 ScriptOptions = "Opciones del archivo"
 ExecuteScript = "Ejecutar el archivo"
-AutoImportScript = "Importacion auto en interprete"
+AutoImportScript = "Importación auto en intérprete"
 DeleteScript = "Eliminar el archivo"
 FunctionsAndVariables = "Funciones y variables"
 AllowedCharactersaz09 = "Caracteres permitidos : a-z, 0-9, _"
diff --git a/apps/graph/base.es.i18n b/apps/graph/base.es.i18n
index 23d2e66a6..3d095ec4d 100644
--- a/apps/graph/base.es.i18n
+++ b/apps/graph/base.es.i18n
@@ -1,21 +1,21 @@
-FunctionApp = "Funcion"
-FunctionAppCapital = "FUNCION"
+FunctionApp = "Función"
+FunctionAppCapital = "FUNCIÓN"
 FunctionTab = "Funciones"
-AddFunction = "Agregar una funcion"
-DeleteFunction = "Eliminar la funcion"
+AddFunction = "Agregar una función"
+DeleteFunction = "Eliminar la función"
 FunctionColor = "Color de la funcion"
-NoFunction = "Ninguna funcion"
-NoActivatedFunction = "Ninguna funcion activada"
+NoFunction = "Ninguna función"
+NoActivatedFunction = "Ninguna función activada"
 PlotOptions = "Opciones de la curva"
 Compute = "Calcular"
-Zeros = "Raices"
+Zeros = "Raíces"
 Tangent = "Tangente"
-Intersection = "Interseccion"
-SelectLowerBound = "Seleccionar el limite inferior"
-SelectUpperBound = "Seleccionar el limite superior"
+Intersection = "Intersección"
+SelectLowerBound = "Seleccionar el límite inferior"
+SelectUpperBound = "Seleccionar el límite superior"
 NoMaximumFound = "Níngun máximo encontrado"
 NoMinimumFound = "Níngun mínimo encontrado"
-NoZeroFound = "Ninguna raiz encontrada"
+NoZeroFound = "Ninguna raíz encontrada"
 NoIntersectionFound = "Ninguna intersección encontrada"
 DerivativeFunctionColumn = "Columna de la derivada"
 HideDerivativeColumn = "Ocultar la derivada"
diff --git a/apps/on_boarding/base.es.i18n b/apps/on_boarding/base.es.i18n
index 4144aa41a..45291d1ce 100644
--- a/apps/on_boarding/base.es.i18n
+++ b/apps/on_boarding/base.es.i18n
@@ -1,7 +1,7 @@
-UpdateAvailable = "ACTUALIZACION DISPONIBLE"
+UpdateAvailable = "ACTUALIZACIÓN DISPONIBLE"
 UpdateMessage1 = "Hay mejoras importantes"
 UpdateMessage2 = "para su calculadora."
-UpdateMessage3 = "Visite nuestra pagina desde su ordenador"
+UpdateMessage3 = "Visite nuestra página desde su ordenador"
 UpdateMessage4 = "www.numworks.com/update"
 BetaVersion = "BETA VERSION"
 BetaVersionMessage1 = ""
diff --git a/apps/probability/base.es.i18n b/apps/probability/base.es.i18n
index 515b99191..5538fd8cd 100644
--- a/apps/probability/base.es.i18n
+++ b/apps/probability/base.es.i18n
@@ -1,22 +1,22 @@
 ProbaApp = "Probabilidad"
 ProbaAppCapital = "PROBABILIDAD"
-ChooseLaw = "Seleccionar la distribucion"
+ChooseLaw = "Seleccionar la distribución"
 Binomial = "Binomial"
 Uniforme = "Uniforme"
 Exponential = "Exponencial"
 Normal = "Normal"
 Poisson = "Poisson"
-BinomialLaw = "Distribucion binomial"
-UniformLaw = "Distribucion uniforme"
-ExponentialLaw = "Distribucion exponencial"
-NormalLaw = "Distribucion normal"
-PoissonLaw = "Distribucion de Poisson"
-ChooseParameters = "Seleccionar parametros"
-RepetitionNumber = "n : Numero de ensayos "
-SuccessProbability = "p : Probabilidad de exito "
+BinomialLaw = "Distribución binomial"
+UniformLaw = "Distribución uniforme"
+ExponentialLaw = "Distribución exponencial"
+NormalLaw = "Distribución normal"
+PoissonLaw = "Distribución de Poisson"
+ChooseParameters = "Seleccionar parámetros"
+RepetitionNumber = "n : Número de ensayos "
+SuccessProbability = "p : Probabilidad de éxito "
 IntervalDefinition = "[a,b] : Intervalo"
-LambdaExponentialDefinition = "λ : Parametro"
+LambdaExponentialDefinition = "λ : Parámetro"
 MeanDefinition = "µ : Media"
-DeviationDefinition = "σ : Desviacion tipica"
-LambdaPoissonDefinition = "λ : Parametro"
+DeviationDefinition = "σ : Desviación típica"
+LambdaPoissonDefinition = "λ : Parámetro"
 ComputeProbability = "Calcular las probabilidades"
diff --git a/apps/regression/base.es.i18n b/apps/regression/base.es.i18n
index 99448e054..f7cdc25b0 100644
--- a/apps/regression/base.es.i18n
+++ b/apps/regression/base.es.i18n
@@ -1,21 +1,21 @@
-RegressionApp = "Regresion"
-RegressionAppCapital = "REGRESION"
-Regression = "Regresion"
+RegressionApp = "Regresión"
+RegressionAppCapital = "REGRESIÓN"
+Regression = "Regresión"
 Reg = "reg"
 MeanDot = "media"
 RegressionCurve = "Curva de regresión"
-XPrediction = "Prediccion dado X"
-YPrediction = "Prediccion dado Y"
+XPrediction = "Predicción dado X"
+YPrediction = "Predicción dado Y"
 ValueNotReachedByRegression = "Valor no alcanzado en esta ventana"
-NumberOfDots = "Numero de puntos"
+NumberOfDots = "Número de puntos"
 Covariance = "Covarianza"
 Linear = "Lineal"
-Quadratic = "Cuadratica"
-Cubic = "Cubica"
-Quartic = "Cuartica"
-Logarithmic = "Logaritmica"
+Quadratic = "Cuadrática"
+Cubic = "Cúbica"
+Quartic = "Cuártica"
+Logarithmic = "Logarítmica"
 Exponential = "Exponencial"
 Power = "Potencial"
-Trigonometrical = "Trigonometrica"
-Logistic = "Logistica"
+Trigonometrical = "Trigonométrica"
+Logistic = "Logística"
 DataNotSuitableForRegression = "Datos no adecuados"
diff --git a/apps/sequence/base.es.i18n b/apps/sequence/base.es.i18n
index 5808cbf9b..4bf2fe492 100644
--- a/apps/sequence/base.es.i18n
+++ b/apps/sequence/base.es.i18n
@@ -1,22 +1,22 @@
-SequenceApp = "Sucesion"
-SequenceAppCapital = "SUCESION"
+SequenceApp = "Sucesión"
+SequenceAppCapital = "SUCESIÓN"
 SequenceTab = "Sucesiones"
-AddSequence = "Agregar una sucesion"
-ChooseSequenceType = "Seleccionar el tipo de sucesion"
-SequenceType = "Tipo de sucesion"
-Explicit = "Formula explicita"
+AddSequence = "Agregar una sucesión"
+ChooseSequenceType = "Seleccionar el tipo de sucesión"
+SequenceType = "Tipo de sucesión"
+Explicit = "Fórmula explícita"
 SingleRecurrence = "Recurrencia de orden uno"
 DoubleRecurrence = "Recurrencia de orden dos"
-SequenceOptions = "Opciones de la sucesion"
-SequenceColor = "Color de la sucesion"
-DeleteSequence = "Eliminar la sucesion"
-NoSequence = "Ninguna sucesion"
-NoActivatedSequence = "Ninguna sucesion activada"
+SequenceOptions = "Opciones de la sucesión"
+SequenceColor = "Color de la sucesión"
+DeleteSequence = "Eliminar la sucesión"
+NoSequence = "Ninguna sucesión"
+NoActivatedSequence = "Ninguna sucesión activada"
 NStart = "N inicio"
 NEnd = "N fin"
-TermSum = "Suma de terminos"
-SelectFirstTerm = "Seleccionar el premer termino "
-SelectLastTerm = "Seleccionar el ultimo termino "
+TermSum = "Suma de términos"
+SelectFirstTerm = "Seleccionar el primer término "
+SelectLastTerm = "Seleccionar el último término "
 ValueNotReachedBySequence = "No se alcanza este valor"
 NColumn = "Columna n"
-FirstTermIndex = "Indice del primer termino"
+FirstTermIndex = "Índice del primer término"
diff --git a/apps/settings/base.es.i18n b/apps/settings/base.es.i18n
index 68d1ca4b5..7c14e1e10 100644
--- a/apps/settings/base.es.i18n
+++ b/apps/settings/base.es.i18n
@@ -1,6 +1,6 @@
-SettingsApp = "Configuracion"
-SettingsAppCapital = "CONFIGURACION"
-AngleUnit = "Medida del angulo"
+SettingsApp = "Configuración"
+SettingsAppCapital = "CONFIGURACIÓN"
+AngleUnit = "Medida del ángulo"
 DisplayMode = "Formato resultado"
 EditionMode = "Formato escritura"
 EditionLinear = "En línea "
@@ -13,13 +13,13 @@ About = "Acerca"
 Degres = "Grados "
 Radian = "Radianes "
 Decimal = "Decimal "
-Scientific = "Cientifico "
+Scientific = "Científico "
 SignificantFigures = "Cifras significativas "
 Real = "Real "
 Cartesian = "Binómica "
 Polar = "Polar "
 Brightness = "Brillo"
-SoftwareVersion = "Version de software"
-SerialNumber = "Numero serie"
-UpdatePopUp = "Pop-up de actualizacion"
+SoftwareVersion = "Versión de software"
+SerialNumber = "Número serie"
+UpdatePopUp = "Pop-up de actualización"
 BetaPopUp = "Beta pop-up"
diff --git a/apps/shared.es.i18n b/apps/shared.es.i18n
index 697790e12..8ce9866b6 100644
--- a/apps/shared.es.i18n
+++ b/apps/shared.es.i18n
@@ -9,7 +9,7 @@ ColumnOptions = "Opciones de la columna"
 CopyColumnInList = "Copiar la columna en una lista"
 DataNotSuitable = "Datos no adecuados"
 DataTab = "Datos"
-DefaultSetting = "Ajustes basicos"
+DefaultSetting = "Ajustes básicos"
 Deg = "gra"
 Deviation = "Varianza"
 DisplayValues = "Visualizar los valores"
@@ -19,17 +19,17 @@ ExitExamMode2 = "examen ?"
 FillWithFormula = "Rellenar con una fórmula"
 ForbiddenValue = "Valor prohibido"
 FunctionColumn = "Columna 0(0)"
-FunctionOptions = "Opciones de la funcion"
+FunctionOptions = "Opciones de la función"
 Goto = "Ir a"
-GraphTab = "Grafico"
+GraphTab = "Gráfico"
 HardwareTestLaunch1 = "Esta iniciando la prueba de"
 HardwareTestLaunch2 = "fabrica. Para quitar la prueba,"
 HardwareTestLaunch3 = "debera resetear su equipo."
 HardwareTestLaunch4 = ""
-Initialization = "Inicializacion"
+Initialization = "Inicialización"
 IntervalSet = "Ajustar el intervalo"
 Language = "Idioma"
-LowBattery = "Bateria baja"
+LowBattery = "Batería baja"
 Mean = "Media"
 Move = " Mover : "
 NameCannotStartWithNumber = "Un nombre no puede empezar con un número"
@@ -37,28 +37,28 @@ NameTaken = "Este nombre ya está en uso"
 NameTooLong = "Este nombre es demasiado largo"
 Next = "Siguiente"
 NoDataToPlot = "Ningunos datos que dibujar"
-NoFunctionToDelete = "Ninguna funcion que eliminar"
+NoFunctionToDelete = "Ninguna función que eliminar"
 NoValueToCompute = "Ninguna medida que calcular"
 Ok = "Confirmar"
 Or = " o "
 Orthonormal = "Ortonormal"
-Plot = "Dibujar el grafico"
-PoolMemoryFull1 = "La memoria de trabajo esta llena."
+Plot = "Dibujar el gráfico"
+PoolMemoryFull1 = "La memoria de trabajo está llena."
 PoolMemoryFull2 = "Intente de nuevo."
 Rad = "rad"
 Rename = "Renombrar"
 RoundAbscissa = "Abscisas enteras"
 Sci = "sci/"
 SquareSum = "Suma cuadrados"
-StandardDeviation = "Desviacion tipica"
+StandardDeviation = "Desviación típica"
 StatTab = "Medidas"
 Step = "Incremento"
-StorageMemoryFull1 = "La memoria esta llena."
+StorageMemoryFull1 = "La memoria está llena."
 StorageMemoryFull2 = "Borre datos e intente de nuevo."
 StoreExpressionNotAllowed = "'store' no está permitido"
-SyntaxError = "Error sintactico"
+SyntaxError = "Error sintáctico"
 ToZoom = "Zoom : "
-Trigonometric = "Trigonometrico"
+Trigonometric = "Trigonométrico"
 UndefinedValue = "Valor indefinido"
 ValueNotReachedByFunction = "No se alcanza este valor"
 ValuesTab = "Tabla"
diff --git a/apps/solver/base.es.i18n b/apps/solver/base.es.i18n
index 7702ad8ec..7667ba3b5 100644
--- a/apps/solver/base.es.i18n
+++ b/apps/solver/base.es.i18n
@@ -9,7 +9,7 @@ UnrealEquation = "Una ecuación no es real"
 UndefinedEquation = "Una ecuación es indefinida"
 TooManyVariables = "Hay demasiadas incógnitas"
 NonLinearSystem = "El sistema no es lineal"
-Solution = "Solucion"
+Solution = "Solución"
 ApproximateSolution = "Solución aproximada"
 SearchInverval = "Intervalo de búsqueda"
 NoSolutionSystem = "El sistema no tiene solución"
diff --git a/apps/statistics/base.es.i18n b/apps/statistics/base.es.i18n
index 7a31fe73b..80ff1fcc4 100644
--- a/apps/statistics/base.es.i18n
+++ b/apps/statistics/base.es.i18n
@@ -1,5 +1,5 @@
-StatsApp = "Estadistica"
-StatsAppCapital = "ESTADISTICA"
+StatsApp = "Estadística"
+StatsAppCapital = "ESTADÍSTICA"
 HistogramTab = "Histograma"
 BoxTab = "Caja"
 Values1 = "Valores V1"
@@ -12,14 +12,14 @@ ImportList = "Importar una lista"
 Interval = " Intervalo"
 Size = " Frecuencia"
 Frequency = "Relativa"
-HistogramSet = "Parametros del histograma"
+HistogramSet = "Parámetros del histograma"
 RectangleWidth = "Ancho del rectangulo"
 BarStart = "Principio de la serie"
 FirstQuartile = "Primer cuartil"
 Median = "Mediana"
 ThirdQuartile = "Tercer cuartil"
-TotalSize = "Poblacion"
+TotalSize = "Población"
 Range = "Rango"
-StandardDeviationSigma = "Desviacion tipica σ"
-SampleStandardDeviationS = "Desviacion tipica s"
+StandardDeviationSigma = "Desviación típica σ"
+SampleStandardDeviationS = "Desviación típica s"
 InterquartileRange = "Rango intercuartilo"
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index 8a50cc81a..ed6651b9f 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -1,16 +1,16 @@
 Toolbox = "Toolbox"
 AbsoluteValue = "Valor absoluto"
-NthRoot = "Raiz enesima"
+NthRoot = "Raíz enesima"
 BasedLogarithm = "Logaritmo en base a"
-Calculation = "Calculos"
-ComplexNumber = "Numeros complejos"
+Calculation = "Cálculos"
+ComplexNumber = "Números complejos"
 Probability = "Combinatoria"
-Arithmetic = "Aritmetica"
+Arithmetic = "Aritmética"
 Matrices = "Matriz"
 NewMatrix = "Nueva matriz"
 Lists = "Listas"
-HyperbolicTrigonometry = "Trigonometria hiperbolica"
-Fluctuation = "Interval de prediccion"
+HyperbolicTrigonometry = "Trigonometría hiperbólica"
+Fluctuation = "Interval de predicción"
 DerivateNumber = "Derivada"
 Integral = "Integral"
 Sum = "Suma"
@@ -20,33 +20,33 @@ Agument = "Argumento"
 RealPart = "Parte real"
 ImaginaryPart = "Parte imaginaria"
 Conjugate = "Conjugado"
-Combination = "Combinacion"
-Permutation = "Variacion"
+Combination = "Combinación"
+Permutation = "Variación"
 GreatCommonDivisor = "MCD"
 LeastCommonMultiple = "MCM"
-Remainder = "Resto division p por q"
-Quotient = "Cociente division p por q"
+Remainder = "Resto división p por q"
+Quotient = "Cociente división p por q"
 Inverse = "Inversa"
 Determinant = "Determinante"
 Transpose = "Transpuesta"
 Trace = "Traza"
-Dimension = "Tamano"
-Sort = "Clasificacion ascendente"
-InvSort = "Clasificacion descendente"
-Maximum = "Maximo"
-Minimum = "Minimo"
+Dimension = "Tamaño"
+Sort = "Clasificación ascendente"
+InvSort = "Clasificación descendente"
+Maximum = "Máximo"
+Minimum = "Mínimo"
 Floor = "Parte entera"
 FracPart = "Parte fraccionaria"
 Ceiling = "Techo"
 Rounding = "Redondeo n digitos"
-HyperbolicCosine = "Coseno hiperbolico"
-HyperbolicSine = "Seno hiperbolico"
-HyperbolicTangent = "Tangente hiperbolica"
-InverseHyperbolicCosine = "Argumento coseno hiperbolico"
-InverseHyperbolicSine = "Argumento seno hiperbolico"
-InverseHyperbolicTangent = "Argumento tangente hiperbolica"
-Prediction95 = "Intervalo de prediccion 95%"
-Prediction = "Intervalo de prediccion simple"
+HyperbolicCosine = "Coseno hiperbólico"
+HyperbolicSine = "Seno hiperbólico"
+HyperbolicTangent = "Tangente hiperbòlica"
+InverseHyperbolicCosine = "Argumento coseno hiperbólico"
+InverseHyperbolicSine = "Argumento seno hiperbólico"
+InverseHyperbolicTangent = "Argumento tangente hiperbólica"
+Prediction95 = "Intervalo de predicción 95%"
+Prediction = "Intervalo de predicción simple"
 Confidence = "Intervalo de confianza"
 RandomAndApproximation = "Aleatorio y aproximación"
 RandomFloat = "Número decimal en [0,1["
diff --git a/apps/usb/base.es.i18n b/apps/usb/base.es.i18n
index f670338df..7fa1e5cd7 100644
--- a/apps/usb/base.es.i18n
+++ b/apps/usb/base.es.i18n
@@ -1,7 +1,7 @@
 USBConnected = "CALCULADORA CONECTADA"
 ConnectedMessage1 = "Para transferir datos, visite"
-ConnectedMessage2 = "nuestra pagina desde su ordenador"
+ConnectedMessage2 = "nuestra página desde su ordenador"
 ConnectedMessage3 = "workshop.numworks.com"
-ConnectedMessage4 = "Pulse el boton RETURN de la"
-ConnectedMessage5 = "calculadora o desenchufela para"
-ConnectedMessage6 = "desconectarla."
+ConnectedMessage4 = "Pulse el botón RETURN de la"
+ConnectedMessage5 = "calculadora o desenchúfela para"
+ConnectedMessage6 = "desconectarla."
\ No newline at end of file

From 0f52a4293c6d2cfedfcb89b12dabd20754a79f9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9o=20Sol=C3=A9?= <leo.sole@numworks.com>
Date: Wed, 30 Jan 2019 12:00:36 +0100
Subject: [PATCH 076/295] [toolbox] Translate toolbox title in all languages

---
 apps/toolbox.de.i18n | 2 +-
 apps/toolbox.es.i18n | 2 +-
 apps/toolbox.fr.i18n | 2 +-
 apps/toolbox.pt.i18n | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/apps/toolbox.de.i18n b/apps/toolbox.de.i18n
index 05950344e..77bdd6ffb 100644
--- a/apps/toolbox.de.i18n
+++ b/apps/toolbox.de.i18n
@@ -1,4 +1,4 @@
-Toolbox = "Toolbox"
+Toolbox = "Werkzeugkasten"
 AbsoluteValue = "Betragsfunktion"
 NthRoot = "n-te Wurzel"
 BasedLogarithm = "Logarithmus zur Basis a"
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index ed6651b9f..0adb2df16 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -1,4 +1,4 @@
-Toolbox = "Toolbox"
+Toolbox = "Caja de herramientas"
 AbsoluteValue = "Valor absoluto"
 NthRoot = "Raíz enesima"
 BasedLogarithm = "Logaritmo en base a"
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index 8e6f65246..bc6440ddd 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -1,4 +1,4 @@
-Toolbox = "Toolbox"
+Toolbox = "Boîte à outils"
 AbsoluteValue = "Valeur absolue"
 NthRoot = "Racine n-ième"
 BasedLogarithm = "Logarithme base a"
diff --git a/apps/toolbox.pt.i18n b/apps/toolbox.pt.i18n
index ba00c693f..d34e5dec9 100644
--- a/apps/toolbox.pt.i18n
+++ b/apps/toolbox.pt.i18n
@@ -1,4 +1,4 @@
-Toolbox = "Toolbox"
+Toolbox = "Caixa de ferramentas"
 AbsoluteValue = "Valor absoluto"
 NthRoot = "Radiciacao"
 BasedLogarithm = "Logaritmo na base a"

From e338577793e0bce79ad084449b4a36cecad0f2a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 30 Jan 2019 11:48:31 +0100
Subject: [PATCH 077/295] [unicode] Clean decoder use

---
 apps/code/python_text_area.cpp          | 18 ++++++++----------
 escher/src/text_area.cpp                |  8 +++++---
 escher/src/text_field.cpp               |  2 +-
 ion/include/ion/unicode/utf8_helper.h   |  2 +-
 ion/src/shared/unicode/utf8_decoder.cpp |  3 ++-
 ion/src/shared/unicode/utf8_helper.cpp  |  2 ++
 poincare/src/parsing/tokenizer.cpp      | 12 +++---------
 7 files changed, 22 insertions(+), 25 deletions(-)

diff --git a/apps/code/python_text_area.cpp b/apps/code/python_text_area.cpp
index b38700d23..c7e958aab 100644
--- a/apps/code/python_text_area.cpp
+++ b/apps/code/python_text_area.cpp
@@ -119,22 +119,20 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
      * basis. This can work, however the MicroPython lexer won't accept a line
      * starting with a whitespace. So we're discarding leading whitespaces
      * beforehand. */
-    UTF8Decoder decoder(text);
-    const char * p = decoder.stringPosition();
-    CodePoint c = decoder.nextCodePoint();
-    while (p < text + byteLength && c  == ' ') {
-        p = decoder.stringPosition();
-        c = decoder.nextCodePoint();
+    const char * firstNonSpace = UTF8Helper::NotCodePointSearch(text, ' ');
+    if (UTF8Helper::CodePointIs(firstNonSpace, UCodePointNull)) {
+      nlr_pop();
+      return;
     }
 
-    mp_lexer_t * lex = mp_lexer_new_from_str_len(0, p, byteLength - (p - text), 0);
+    mp_lexer_t * lex = mp_lexer_new_from_str_len(0, firstNonSpace, byteLength - (firstNonSpace - text), 0);
     LOG_DRAW("Pop token %d\n", lex->tok_kind);
 
-    const char * tokenFrom = p;
+    const char * tokenFrom = firstNonSpace;
     size_t tokenLength = 0;
     while (lex->tok_kind != MP_TOKEN_NEWLINE && lex->tok_kind != MP_TOKEN_END) {
 
-      tokenFrom = p + lex->tok_column - 1;
+      tokenFrom = firstNonSpace + lex->tok_column - 1;
       tokenLength = TokenLength(lex);
       LOG_DRAW("Draw \"%.*s\" for token %d\n", tokenLength, tokenFrom, lex->tok_kind);
       drawStringAt(ctx, line,
@@ -151,7 +149,7 @@ void PythonTextArea::ContentView::drawLine(KDContext * ctx, int line, const char
 
     tokenFrom += tokenLength;
     if (tokenFrom < text + byteLength) {
-      LOG_DRAW("Draw comment \"%.*s\" from %d\n", byteLength - (tokenFrom - text), p, tokenFrom);
+      LOG_DRAW("Draw comment \"%.*s\" from %d\n", byteLength - (tokenFrom - text), firstNonSpace, tokenFrom);
       drawStringAt(ctx, line,
           UTF8Helper::GlyphOffsetAtCodePoint(text, tokenFrom),
           tokenFrom,
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 9e41714d9..3478e06ba 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -57,10 +57,10 @@ bool TextArea::handleEvent(Ion::Events::Event event) {
     decoder.previousCodePoint();
     return setCursorLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Right) {
-    if (*cursorLocation() == 0) {
+    if (UTF8Helper::CodePointIs(cursorLocation(), UCodePointNull)) {
       return false;
     }
-    UTF8Decoder decoder(text(), cursorLocation());
+    UTF8Decoder decoder(cursorLocation());
     decoder.nextCodePoint();
     return setCursorLocation(decoder.stringPosition());
   } else if (event == Ion::Events::Up) {
@@ -216,7 +216,9 @@ CodePoint TextArea::Text::removeCodePoint(char * * position) {
 
 size_t TextArea::Text::removeRemainingLine(const char * location, int direction) {
   assert(m_buffer != nullptr);
-  assert(location >= m_buffer && location < m_buffer + m_bufferSize);
+  assert(location >= m_buffer && location <= m_buffer + m_bufferSize);
+  assert(direction > 0 || location > m_buffer);
+  assert(direction < 0 || location < m_buffer + m_bufferSize);
 
   UTF8Decoder decoder(m_buffer, location);
   const char * codePointPosition = decoder.stringPosition();
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 2ee9ef894..0ef6931e6 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -440,7 +440,7 @@ bool TextField::privateHandleMoveEvent(Ion::Events::Event event) {
   }
   if (event == Ion::Events::Right && isEditing() && cursorLocation() < m_contentView.draftTextBuffer() + draftTextLength()) {
     assert(isEditing());
-    UTF8Decoder decoder(m_contentView.draftTextBuffer(), cursorLocation());
+    UTF8Decoder decoder(cursorLocation());
     decoder.nextCodePoint();
     return setCursorLocation(decoder.stringPosition());
   }
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 4a7f27985..337c38f96 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -15,7 +15,7 @@ const char * CodePointSearch(const char * s, CodePoint c);
 
 /* Returns the first occurence of a code point that is not c in a string,
  * stopping at the null-terminating char or the start of string. */
-const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft, const char * initialPosition);
+const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft = false, const char * initialPosition = nullptr);
 
 /* Copy src into dst while removing all code points c. Also update an index
  * that should be lower if code points where removed before it. Ensure null-
diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index c95279bb1..45e92ad49 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -4,6 +4,7 @@
 static inline int leading_ones(uint8_t value) {
   for (int i=0; i<8; i++) {
     if (!(value & 0x80)) {
+      assert(i <= 4);
       return i;
     }
     value = value << 1;
@@ -17,7 +18,7 @@ static inline uint8_t last_k_bits(uint8_t value, uint8_t bits) {
 }
 
 CodePoint UTF8Decoder::nextCodePoint() {
-  assert(m_stringPosition == m_stringPosition || *(m_stringPosition - 1) != 0);
+  assert(m_stringPosition == m_string || *(m_stringPosition - 1) != 0);
   int leadingOnes = leading_ones(*m_stringPosition);
   uint32_t result = last_k_bits(*m_stringPosition++, 8-leadingOnes-1);
   for (int i = 0; i < leadingOnes - 1; i++) {
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 2123229bc..384db546b 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -9,6 +9,7 @@ static inline int minInt(int x, int y) { return x < y ? x : y; }
 static inline size_t minSizeT(size_t x, size_t y) { return x < y ? x : y; }
 
 int CountOccurrences(const char * s, CodePoint c) {
+  assert(c != UCodePointNull);
   int count = 0;
   if (UTF8Decoder::CharSizeOfCodePoint(c) == 1) {
     /* The code point is one char long, so it is equal to its char translation.
@@ -55,6 +56,7 @@ const char * CodePointSearch(const char * s, CodePoint c) {
 }
 
 const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft, const char * initialPosition) {
+  // TODO LEA: optimize for one byte long c?
   if (goingLeft) {
     assert(initialPosition != nullptr);
     if (initialPosition == s) {
diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 878e442ec..10ec5ef36 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -15,19 +15,13 @@ static inline bool isDigit(const CodePoint c) {
 
 const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, bool * testResult) {
   UTF8Decoder decoder(m_text);
-  const char * currentPointer = m_text;
   CodePoint firstCodePoint = decoder.nextCodePoint();
-  const char * nextPointer = decoder.stringPosition();
-  size_t numberOfBytesForCodePoint = nextPointer - currentPointer;
+  const char * nextTextPosition = decoder.stringPosition();
   if (firstCodePoint != UCodePointNull) {
-    currentPointer = nextPointer;
     CodePoint codePoint = decoder.nextCodePoint();
-    nextPointer = decoder.stringPosition();
     while (codePoint.isCombining()) {
-      numberOfBytesForCodePoint+= nextPointer - currentPointer;
-      currentPointer = nextPointer;
+      nextTextPosition = decoder.stringPosition();
       codePoint = decoder.nextCodePoint();
-      nextPointer = decoder.stringPosition();
     }
   }
   // TODO handle combined code points? For now the combining codepoints get dropped.
@@ -36,7 +30,7 @@ const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, boo
     *testResult = shouldPop;
   }
   if (shouldPop) {
-    m_text+= numberOfBytesForCodePoint;
+    m_text = nextTextPosition;
   }
   return firstCodePoint;
 }

From 4f63b16e0a25c0759186a54d72140930dd46f266 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 30 Jan 2019 15:26:31 +0100
Subject: [PATCH 078/295] [unicode] Fix portuguese literals

---
 apps/calculation/base.pt.i18n |  4 ++--
 apps/code/base.pt.i18n        |  4 ++--
 apps/graph/base.pt.i18n       | 28 +++++++++++++-------------
 apps/home/base.pt.i18n        |  2 +-
 apps/on_boarding/base.pt.i18n |  4 ++--
 apps/probability/base.pt.i18n | 24 +++++++++++-----------
 apps/regression/base.pt.i18n  | 24 +++++++++++-----------
 apps/sequence/base.pt.i18n    | 36 ++++++++++++++++-----------------
 apps/settings/base.pt.i18n    | 14 ++++++-------
 apps/shared.pt.i18n           | 38 +++++++++++++++++------------------
 apps/solver/base.pt.i18n      |  2 +-
 apps/statistics/base.pt.i18n  | 22 ++++++++++----------
 apps/usb/base.pt.i18n         |  4 ++--
 apps/variables.pt.i18n        |  2 +-
 14 files changed, 104 insertions(+), 104 deletions(-)

diff --git a/apps/calculation/base.pt.i18n b/apps/calculation/base.pt.i18n
index 77fde7917..1b4b273ee 100644
--- a/apps/calculation/base.pt.i18n
+++ b/apps/calculation/base.pt.i18n
@@ -1,2 +1,2 @@
-CalculApp = "Calculo"
-CalculAppCapital = "CALCULO"
+CalculApp = "Cálculo"
+CalculAppCapital = "CÁLCULO"
diff --git a/apps/code/base.pt.i18n b/apps/code/base.pt.i18n
index 29acc7c3c..d44da5a19 100644
--- a/apps/code/base.pt.i18n
+++ b/apps/code/base.pt.i18n
@@ -1,8 +1,8 @@
 Console = "Interpretador interativo"
 AddScript = "Adicionar um script"
-ScriptOptions = "Opcoes de script"
+ScriptOptions = "Opções de script"
 ExecuteScript = "Executar o script"
-AutoImportScript = "Importacao auto no interpretador"
+AutoImportScript = "Importação auto no interpretador"
 DeleteScript = "Eliminar o script"
 FunctionsAndVariables = "Funções e variáveis"
 AllowedCharactersaz09 = "Caracteres permitidos : a-z, 0-9, _"
diff --git a/apps/graph/base.pt.i18n b/apps/graph/base.pt.i18n
index 693d1c8ca..eed09f293 100644
--- a/apps/graph/base.pt.i18n
+++ b/apps/graph/base.pt.i18n
@@ -1,23 +1,23 @@
-FunctionApp = "Funcao"
-FunctionAppCapital = "FUNCAO"
-FunctionTab = "Funcoes"
-AddFunction = "Adicionar uma funcao"
-DeleteFunction = "Eliminar a funcao"
-FunctionColor = "Cor da funcao"
-NoFunction = "Nenhuma funcao"
-NoActivatedFunction = "Sem funcao ativada"
-PlotOptions = "Opcoes da curva"
+FunctionApp = "Função"
+FunctionAppCapital = "FUNÇÃO"
+FunctionTab = "Funções"
+AddFunction = "Adicionar uma função"
+DeleteFunction = "Eliminar a função"
+FunctionColor = "Cor da função"
+NoFunction = "Nenhuma função"
+NoActivatedFunction = "Sem função ativada"
+PlotOptions = "Opções da curva"
 Compute = "Calcular"
-Zeros = "Raizes"
+Zeros = "Raízes"
 Tangent = "Tangente"
-Intersection = "Interseccao"
+Intersection = "Intersecção"
 SelectLowerBound = "Selecionar limite superior"
 SelectUpperBound = "Selecionar limite inferior"
 NoMaximumFound = "Nenhum máximo encontrado"
 NoMinimumFound = "Nenhum mínimo encontrado"
 NoZeroFound = "Nenhuma raiz encontrada"
-NoIntersectionFound = "Nenhuma interseção encontrada"
-DerivativeFunctionColumn = "Coluna da funcao derivada"
-HideDerivativeColumn = "Esconder funcao derivada"
+NoIntersectionFound = "Nenhuma intersecção encontrada"
+DerivativeFunctionColumn = "Coluna da função derivada"
+HideDerivativeColumn = "Esconder função derivada"
 AllowedCharactersAZaz09 =  "Caracteres permitidos : A-Z, a-z, 0-9, _"
 ReservedName = "Nome reservado"
diff --git a/apps/home/base.pt.i18n b/apps/home/base.pt.i18n
index a990e0109..aa255ea6b 100644
--- a/apps/home/base.pt.i18n
+++ b/apps/home/base.pt.i18n
@@ -1,2 +1,2 @@
 Apps = "Aplicações"
-AppsCapital = "APLICACOES"
+AppsCapital = "APLICAÇÕES"
diff --git a/apps/on_boarding/base.pt.i18n b/apps/on_boarding/base.pt.i18n
index 85bc57f95..db822f4b6 100644
--- a/apps/on_boarding/base.pt.i18n
+++ b/apps/on_boarding/base.pt.i18n
@@ -1,7 +1,7 @@
-UpdateAvailable = "ATUALIZACAO DISPONIVEL"
+UpdateAvailable = "ATUALIZAÇÃO DISPONÍVEL"
 UpdateMessage1 = "Existem melhorias significativas"
 UpdateMessage2 = "para a sua calculadora."
-UpdateMessage3 = "Navegue na nossa pagina do seu computador"
+UpdateMessage3 = "Navegue na nossa página do seu computador"
 UpdateMessage4 = "www.numworks.com/update"
 BetaVersion = "BETA VERSION"
 BetaVersionMessage1 = ""
diff --git a/apps/probability/base.pt.i18n b/apps/probability/base.pt.i18n
index 63faf5620..1915fdf7f 100644
--- a/apps/probability/base.pt.i18n
+++ b/apps/probability/base.pt.i18n
@@ -1,22 +1,22 @@
 ProbaApp = "Probabilidade"
 ProbaAppCapital = "PROBABILIDADE"
-ChooseLaw = "Selecionar a distribuicao"
+ChooseLaw = "Selecionar a distribuição"
 Binomial = "Binomial"
 Uniforme = "Uniforme"
 Exponential = "Exponencial"
 Normal = "Normal"
 Poisson = "Poisson"
-BinomialLaw = "Distribuicao binomial"
-UniformLaw = "Distribuicao uniforme"
-ExponentialLaw = "Distribuicao exponencial"
-NormalLaw = "Distribuicao normal"
-PoissonLaw = "Distribuicao de Poisson"
-ChooseParameters = "Selecionar os parametros"
-RepetitionNumber = "n : Numero de ensaios"
+BinomialLaw = "Distribuição binomial"
+UniformLaw = "Distribuição uniforme"
+ExponentialLaw = "Distribuição exponencial"
+NormalLaw = "Distribuição normal"
+PoissonLaw = "Distribuição de Poisson"
+ChooseParameters = "Selecionar os parâmetros"
+RepetitionNumber = "n : Número de ensaios"
 SuccessProbability = "p : Probabilidade de sucesso"
 IntervalDefinition = "[a,b] : Intervalo"
-LambdaExponentialDefinition = "λ : Parametro"
-MeanDefinition = "µ : Media"
-DeviationDefinition = "σ : Desvio padrao"
-LambdaPoissonDefinition = "λ : Parametro"
+LambdaExponentialDefinition = "λ : Parâmetro"
+MeanDefinition = "µ : Média"
+DeviationDefinition = "σ : Desvio padrão"
+LambdaPoissonDefinition = "λ : Parâmetro"
 ComputeProbability = "Calcular probabilidades"
diff --git a/apps/regression/base.pt.i18n b/apps/regression/base.pt.i18n
index 33edbb367..695352547 100644
--- a/apps/regression/base.pt.i18n
+++ b/apps/regression/base.pt.i18n
@@ -1,21 +1,21 @@
-RegressionApp = "Regressao"
-RegressionAppCapital = "REGRESSAO"
-Regression = "Regressao"
+RegressionApp = "Regressão"
+RegressionAppCapital = "REGRESSÃO"
+Regression = "Regressão"
 Reg = "reg"
 MeanDot = "media"
 RegressionCurve = "Curva de regressão"
-XPrediction = "Predicao dado X"
-YPrediction = "Predicao dado Y"
+XPrediction = "Predição dado X"
+YPrediction = "Predição dado Y"
 ValueNotReachedByRegression = "Valor não alcançado nesta janela"
-NumberOfDots = "Numero de pontos"
+NumberOfDots = "Número de pontos"
 Covariance = "Covariancia"
 Linear = "Linear"
 Quadratic = "Quadrática"
-Cubic = "Cubica"
-Quartic = "Quartica"
-Logarithmic = "Logaritmica"
+Cubic = "Cúbica"
+Quartic = "Quarto grau"
+Logarithmic = "Logarítmica"
 Exponential = "Exponencial"
-Power = "Potencia"
-Trigonometrical = "Trigonometrica"
-Logistic = "Logistica"
+Power = "Potência"
+Trigonometrical = "Trigonométrica"
+Logistic = "Logística"
 DataNotSuitableForRegression = "Dados não adequados"
diff --git a/apps/sequence/base.pt.i18n b/apps/sequence/base.pt.i18n
index 528fcdf4e..c8ac78f76 100644
--- a/apps/sequence/base.pt.i18n
+++ b/apps/sequence/base.pt.i18n
@@ -1,22 +1,22 @@
-SequenceApp = "Sequencia"
-SequenceAppCapital = "SEQUENCIA"
-SequenceTab = "Sequencias"
-AddSequence = "Adicionar uma sequencia"
-ChooseSequenceType = "Escolha o tipo de sequencia"
-SequenceType = "Tipo de sequencia"
-Explicit = "Explicita"
-SingleRecurrence = "Recorrencia de Primeira Ordem"
-DoubleRecurrence = "Recorrencia de Segunda Ordem"
-SequenceOptions = "Opcoes de sequencia"
-SequenceColor = "Cor da sequencia"
-DeleteSequence = "Eliminar a sequencia"
-NoSequence = "Sem sequencia"
-NoActivatedSequence = "Sem sequencia ativada"
-NStart = "N inicio"
+SequenceApp = "Sequência"
+SequenceAppCapital = "SEQUÊNCIA"
+SequenceTab = "Sequências"
+AddSequence = "Adicionar uma sequência"
+ChooseSequenceType = "Escolha o tipo de sequência"
+SequenceType = "Tipo de sequência"
+Explicit = "Explícita"
+SingleRecurrence = "Recorrência de Primeira Ordem"
+DoubleRecurrence = "Recorrência de Segunda Ordem"
+SequenceOptions = "Opções de sequência"
+SequenceColor = "Cor da sequência"
+DeleteSequence = "Eliminar a sequência"
+NoSequence = "Sem sequência"
+NoActivatedSequence = "Sem sequência ativada"
+NStart = "N início"
 NEnd = "N fim"
 TermSum = "Soma dos termos"
 SelectFirstTerm = "Selecionar primeiro termo "
-SelectLastTerm = "Selecionar ultimo termo "
-ValueNotReachedBySequence = "O valor nao e alcancado pela sequencia"
+SelectLastTerm = "Selecionar último termo "
+ValueNotReachedBySequence = "O valor não é alcançado pela sequência"
 NColumn = "Coluna n"
-FirstTermIndex = "Indice do primeiro termo"
+FirstTermIndex = "Índice do primeiro termo"
diff --git a/apps/settings/base.pt.i18n b/apps/settings/base.pt.i18n
index 86f277900..85d70c976 100644
--- a/apps/settings/base.pt.i18n
+++ b/apps/settings/base.pt.i18n
@@ -1,7 +1,7 @@
-SettingsApp = "Configuracao"
-SettingsAppCapital = "CONFIGURACAO"
+SettingsApp = "Configuração"
+SettingsAppCapital = "CONFIGURAÇÃO"
 AngleUnit = "Valor do angulo"
-DisplayMode = "Formato numerico"
+DisplayMode = "Formato numérico"
 EditionMode = "Formato escrita "
 EditionLinear = "Em linha "
 Edition2D = "Natural "
@@ -13,13 +13,13 @@ About = "Acerca"
 Degres = "Graus "
 Radian = "Radianos "
 Decimal = "Decimal "
-Scientific = "Cientifico "
+Scientific = "Científico "
 SignificantFigures = "Algarismo significativo "
 Real = "Real "
 Cartesian = "Cartesiana "
 Polar = "Polar "
 Brightness = "Brilho"
-SoftwareVersion = "Versao do software"
-SerialNumber = "Numero serie"
-UpdatePopUp = "Alertas de atualizacao"
+SoftwareVersion = "Versão do software"
+SerialNumber = "Número serie"
+UpdatePopUp = "Alertas de atualização"
 BetaPopUp = "Beta pop-up"
diff --git a/apps/shared.pt.i18n b/apps/shared.pt.i18n
index 9e12ec57a..e04ba1c2a 100644
--- a/apps/shared.pt.i18n
+++ b/apps/shared.pt.i18n
@@ -1,32 +1,32 @@
 ActivateDeactivate = "Activar/Desactivar"
-ActiveExamModeMessage1 = "Todos os seus dados serao "
-ActiveExamModeMessage2 = "apagados se voce ligar "
+ActiveExamModeMessage1 = "Todos os seus dados serão "
+ActiveExamModeMessage2 = "apagados se você ligar "
 ActiveExamModeMessage3 = "o modo de exame."
 Axis = "Eixos"
 Cancel = "Cancelar"
 ClearColumn = "Excluir coluna"
-ColumnOptions = "Opcoes de coluna"
+ColumnOptions = "Opções de coluna"
 CopyColumnInList = "Copie a coluna em uma lista"
 DataNotSuitable = "Dados não adequados"
 DataTab = "Dados"
-DefaultSetting = "Configuracoes basicas"
+DefaultSetting = "Configurações basicas"
 Deg = "gra"
 Deviation = "Variancia"
 DisplayValues = "Exibir os valores"
-Empty = "Vacuo"
-ExitExamMode1 = "Voce quer sair do modo de "
+Empty = "Vácuo"
+ExitExamMode1 = "Você quer sair do modo de "
 ExitExamMode2 = "exame ?"
 FillWithFormula = "Preencher com uma fórmula"
 ForbiddenValue = "Valor proibida"
 FunctionColumn = "Coluna 0(0)"
-FunctionOptions = "Opcoes de funcao"
+FunctionOptions = "Opções de função"
 Goto = "Ir a"
-GraphTab = "Grafico"
-HardwareTestLaunch1 = "Voce vai executar o teste da planta."
-HardwareTestLaunch2 = "Para sair voce tem que executar"
-HardwareTestLaunch3 = "uma redefinicao, que ira apagar"
+GraphTab = "Gráfico"
+HardwareTestLaunch1 = "Você vai executar o teste da planta."
+HardwareTestLaunch2 = "Para sair você tem que executar"
+HardwareTestLaunch3 = "uma redefinição, que ira apagar"
 HardwareTestLaunch4 = "seus dados."
-Initialization = "Inicializacao"
+Initialization = "Inicialização"
 IntervalSet = "Ajustar o intervalo"
 Language = "Idioma"
 LowBattery = "Bateria fraca"
@@ -36,13 +36,13 @@ NameCannotStartWithNumber = "Um nome não pode começar com um número"
 NameTaken = "Este nome é já usado"
 NameTooLong = "Este nome é muito longo"
 Next = "Seguinte"
-NoDataToPlot = "Nao ha dados para desenhar"
-NoFunctionToDelete = "Sem funcao para eliminar"
+NoDataToPlot = "Não ha dados para desenhar"
+NoFunctionToDelete = "Sem função para eliminar"
 NoValueToCompute = "Nenhuma quantidade para calcular"
 Ok = "Confirmar"
 Or = " ou "
 Orthonormal = "Ortonormado"
-Plot = "Tracar o grafico"
+Plot = "Tracar o gráfico"
 PoolMemoryFull1 = "A memória de trabalho está cheia."
 PoolMemoryFull2 = "Tente novamente."
 Rad = "rad"
@@ -50,7 +50,7 @@ Rename = "Renomear"
 RoundAbscissa = "Inteiro"
 Sci = "sci/"
 SquareSum = "Soma dos quadrados"
-StandardDeviation = "Desvio padrao"
+StandardDeviation = "Desvio padrão"
 StatTab = "Estat"
 Step = "Passo"
 StorageMemoryFull1 = "A memoria esta chéia."
@@ -58,11 +58,11 @@ StorageMemoryFull2 = "Apage dados e tente novamente."
 StoreExpressionNotAllowed = "'store' não está permitido"
 SyntaxError = "Erro de sintaxe"
 ToZoom = "Zoom : "
-Trigonometric = "Trigonometrico"
+Trigonometric = "Trigonométrico"
 UndefinedValue = "Valor indefinido"
-ValueNotReachedByFunction = "O valor nao e alcancado pela funcao"
+ValueNotReachedByFunction = "O valor não é alcançado pela função"
 ValuesTab = "Tabela"
-Warning = "Atencao"
+Warning = "Atenção"
 XEnd = "X fim"
 XStart = "X inicio"
 Zoom = "Zoom"
diff --git a/apps/solver/base.pt.i18n b/apps/solver/base.pt.i18n
index 29c643aff..c1c28d11b 100644
--- a/apps/solver/base.pt.i18n
+++ b/apps/solver/base.pt.i18n
@@ -1,5 +1,5 @@
 SolverApp = "Equações"
-SolverAppCapital = "EQUACOES"
+SolverAppCapital = "EQUAÇÕES"
 AddEquation = "Adicione uma equação"
 ResolveEquation = "Resolver a equação"
 ResolveSystem = "Resolver o sistema"
diff --git a/apps/statistics/base.pt.i18n b/apps/statistics/base.pt.i18n
index c8b93fa37..5bb6e6044 100644
--- a/apps/statistics/base.pt.i18n
+++ b/apps/statistics/base.pt.i18n
@@ -1,25 +1,25 @@
-StatsApp = "Estatistica"
-StatsAppCapital = "ESTATISTICA"
+StatsApp = "Estatística"
+StatsAppCapital = "ESTATÍSTICA"
 HistogramTab = "Histograma"
 BoxTab = "Caixa"
 Values1 = "Valores V1"
 Values2 = "Valores V2"
 Values3 = "Valores V3"
-Sizes1 = "Frequencias N1"
-Sizes2 = "Frequencias N2"
-Sizes3 = "Frequencias N3"
+Sizes1 = "Frequências N1"
+Sizes2 = "Frequências N2"
+Sizes3 = "Frequências N3"
 ImportList = "Importar de uma lista"
 Interval = " Intervalo"
-Size = " Frequencia"
+Size = " Frequência"
 Frequency = "Relativa"
 HistogramSet = "Configurando o histograma"
-RectangleWidth = "Largura dos rectangulos"
-BarStart = "Inicio da serie"
+RectangleWidth = "Largura dos retângulos"
+BarStart = "Início da série"
 FirstQuartile = "Quartil inferior"
 Median = "Mediana"
 ThirdQuartile = "Quartil superior"
-TotalSize = "Numero de itens"
+TotalSize = "Número de itens"
 Range = "Amplitude"
-StandardDeviationSigma = "Desvio padrao σ"
-SampleStandardDeviationS = "Desvio padrao amostral s"
+StandardDeviationSigma = "Desvio padrão σ"
+SampleStandardDeviationS = "Desvio padrão amostral s"
 InterquartileRange = "Interquartil"
diff --git a/apps/usb/base.pt.i18n b/apps/usb/base.pt.i18n
index 8f1ab05ad..0a8d365d8 100644
--- a/apps/usb/base.pt.i18n
+++ b/apps/usb/base.pt.i18n
@@ -1,7 +1,7 @@
-USBConnected = "A CALCULADORA ESTA CONECTADA"
+USBConnected = "A CALCULADORA ESTÁ CONECTADA"
 ConnectedMessage1 = "Para transferir dados, navegue"
 ConnectedMessage2 = "na nossa pagina no seu computador"
 ConnectedMessage3 = "workshop.numworks.com"
-ConnectedMessage4 = "Pressione o botao RETURN na"
+ConnectedMessage4 = "Pressione o botão RETURN na"
 ConnectedMessage5 = "calculadora ou desligue-la para"
 ConnectedMessage6 = "desconectar-la."
diff --git a/apps/variables.pt.i18n b/apps/variables.pt.i18n
index 64ea198b0..1c04be635 100644
--- a/apps/variables.pt.i18n
+++ b/apps/variables.pt.i18n
@@ -1,4 +1,4 @@
-Variables = "Variaveis"
+Variables = "Variáveis"
 Expressions = "Expressões"
 Functions = "Funçães"
 EmptyExpressionBox0 = "Nenhuma variável definida."

From b2a97cfc7a3554faaa500f2ba3a327cb67bcd4c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 31 Jan 2019 10:56:17 +0100
Subject: [PATCH 079/295] [escher] Fix buffer choice in
 TextField::glyphFrameAtPosition

---
 escher/include/escher/text_area.h  |  2 +-
 escher/include/escher/text_field.h |  2 +-
 escher/include/escher/text_input.h |  2 +-
 escher/src/text_area.cpp           |  3 ++-
 escher/src/text_field.cpp          | 11 ++++++-----
 escher/src/text_input.cpp          |  4 ++--
 kandinsky/src/font.cpp             |  2 +-
 7 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 845ce8b0e..1cce3b495 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -119,7 +119,7 @@ protected:
     bool removeEndOfLine() override;
     bool removeStartOfLine();
   protected:
-    KDRect glyphFrameAtPosition(const char * position) const override;
+    KDRect glyphFrameAtPosition(const char * text, const char * position) const override;
     Text m_text;
   };
 
diff --git a/escher/include/escher/text_field.h b/escher/include/escher/text_field.h
index 766051bc0..2cc18c2dc 100644
--- a/escher/include/escher/text_field.h
+++ b/escher/include/escher/text_field.h
@@ -67,7 +67,7 @@ protected:
     constexpr static int k_maxBufferSize = 152;
   private:
     void layoutSubviews() override;
-    KDRect glyphFrameAtPosition(const char * position) const override;
+    KDRect glyphFrameAtPosition(const char * buffer, const char * position) const override;
     bool m_isEditing;
     char * m_textBuffer;
     char * m_draftTextBuffer;
diff --git a/escher/include/escher/text_input.h b/escher/include/escher/text_input.h
index 24a8cdeb5..80de41a50 100644
--- a/escher/include/escher/text_input.h
+++ b/escher/include/escher/text_input.h
@@ -36,7 +36,7 @@ protected:
   protected:
     virtual void layoutSubviews() override;
     void reloadRectFromPosition(const char * position, bool lineBreak = false);
-    virtual KDRect glyphFrameAtPosition(const char * position) const = 0;
+    virtual KDRect glyphFrameAtPosition(const char * buffer, const char * position) const = 0;
     TextCursorView m_cursorView;
     const KDFont * m_font;
     const char * m_cursorLocation;
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 3478e06ba..7e9ece6e7 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -426,7 +426,8 @@ bool TextArea::ContentView::removeStartOfLine() {
   return false;
 }
 
-KDRect TextArea::ContentView::glyphFrameAtPosition(const char * position) const {
+KDRect TextArea::ContentView::glyphFrameAtPosition(const char * text, const char * position) const {
+  assert(text == m_text.text());
   KDSize glyphSize = m_font->glyphSize();
   Text::Position p = m_text.positionAtPointer(position);
 
diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 0ef6931e6..555e51c99 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -45,7 +45,7 @@ void TextField::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
     backgroundColor = KDColorWhite;
   }
   ctx->fillRect(bounds(), backgroundColor);
-  ctx->drawString(text(), glyphFrameAtPosition(text()).origin(), m_font, m_textColor, backgroundColor);
+  ctx->drawString(text(), glyphFrameAtPosition(text(), text()).origin(), m_font, m_textColor, backgroundColor);
 }
 
 const char * TextField::ContentView::text() const {
@@ -207,14 +207,15 @@ void TextField::ContentView::layoutSubviews() {
   TextInput::ContentView::layoutSubviews();
 }
 
-KDRect TextField::ContentView::glyphFrameAtPosition(const char * position) const {
-  assert(position != nullptr);
+KDRect TextField::ContentView::glyphFrameAtPosition(const char * buffer, const char * position) const {
+  assert(buffer != nullptr && position != nullptr);
+  assert(position >= buffer);
   KDSize glyphSize = m_font->glyphSize();
   KDCoordinate cursorWidth = m_cursorView.minimalSizeForOptimalDisplay().width();
   KDCoordinate horizontalOffset = m_horizontalAlignment == 0.0f ? 0.0f :
-    m_horizontalAlignment * (m_frame.width() - m_font->stringSize(text()).width() - cursorWidth);
+    m_horizontalAlignment * (m_frame.width() - m_font->stringSize(buffer).width() - cursorWidth);
   return KDRect(
-      horizontalOffset + m_font->stringSizeUntil(text(), position).width(),
+      horizontalOffset + m_font->stringSizeUntil(buffer, position).width(),
       m_verticalAlignment * (m_frame.height() - glyphSize.height()),
       glyphSize);
 }
diff --git a/escher/src/text_input.cpp b/escher/src/text_input.cpp
index de0da525e..952dd79d5 100644
--- a/escher/src/text_input.cpp
+++ b/escher/src/text_input.cpp
@@ -20,7 +20,7 @@ void TextInput::ContentView::setFont(const KDFont * font) {
 }
 
 KDRect TextInput::ContentView::cursorRect() {
-  return glyphFrameAtPosition(m_cursorLocation);
+  return glyphFrameAtPosition(editedText(), m_cursorLocation);
 }
 
 void TextInput::ContentView::layoutSubviews() {
@@ -32,7 +32,7 @@ void TextInput::ContentView::reloadRectFromPosition(const char * position, bool
 }
 
 KDRect TextInput::ContentView::dirtyRectFromPosition(const char * position, bool lineBreak) const {
-  KDRect glyphRect = glyphFrameAtPosition(position);
+  KDRect glyphRect = glyphFrameAtPosition(text(), position);
   KDRect dirtyRect = KDRect(
       glyphRect.x(),
       glyphRect.y(),
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 68c01495d..4915337c5 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -6,7 +6,7 @@
 constexpr static int k_tabCharacterWidth = 4;
 
 KDSize KDFont::stringSizeUntil(const char * text, const char * limit) const {
-  if (text == nullptr) {
+  if (text == nullptr || (limit != nullptr && text >= limit)) {
     return KDSizeZero;
   }
   KDSize stringSize = KDSize(0, m_glyphSize.height());

From cbb1055218a67d5af8d559fe72c600283b1429f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 31 Jan 2019 11:31:06 +0100
Subject: [PATCH 080/295] [escher] Fix TextField::ContentView::setEditing

---
 escher/src/text_field.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 555e51c99..eab7e828f 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -90,9 +90,12 @@ void TextField::ContentView::setEditing(bool isEditing, bool reinitDrafBuffer) {
 }
 
 void TextField::ContentView::reinitDraftTextBuffer() {
-  setCursorLocation(m_draftTextBuffer);
+  /* We first need to clear the buffer, otherwise setCursorLocation might do
+   * various operations on a buffer with maybe non-initialized content, such as
+   * stringSize, etc. Those operation might be perilous on non-UTF8 content. */
   m_draftTextBuffer[0] = 0;
   m_currentDraftTextLength = 0;
+  setCursorLocation(m_draftTextBuffer);
 }
 
 bool TextField::ContentView::insertTextAtLocation(const char * text, const char * location) {

From 35f65ae255f915a3e062d8359d655bef9ed341d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 31 Jan 2019 11:55:03 +0100
Subject: [PATCH 081/295] [unicode] Handle not properly written UTF8 in
 nextCodePoint

---
 ion/src/shared/unicode/utf8_decoder.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ion/src/shared/unicode/utf8_decoder.cpp b/ion/src/shared/unicode/utf8_decoder.cpp
index 45e92ad49..af0d59d46 100644
--- a/ion/src/shared/unicode/utf8_decoder.cpp
+++ b/ion/src/shared/unicode/utf8_decoder.cpp
@@ -23,7 +23,13 @@ CodePoint UTF8Decoder::nextCodePoint() {
   uint32_t result = last_k_bits(*m_stringPosition++, 8-leadingOnes-1);
   for (int i = 0; i < leadingOnes - 1; i++) {
     result <<= 6;
-    result += (*m_stringPosition++ & 0x3F);
+    char nextChunk = *m_stringPosition++;
+    if (!nextChunk && 0x80) {
+      /* The code point is not properly written. This might be due to a code
+       * point being translated into chars in a too small buffer. */
+      return UCodePointNull;
+    }
+    result += (nextChunk & 0x3F);
   }
   return CodePoint(result);
 }

From bf3e4b0f4b4a943df1223d768ebba547ff07f49a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 31 Jan 2019 14:47:00 +0100
Subject: [PATCH 082/295] [i18n] Remove duplicate entry

---
 apps/probability/base.de.i18n | 1 -
 apps/probability/base.en.i18n | 1 -
 apps/probability/base.es.i18n | 1 -
 apps/probability/base.fr.i18n | 1 -
 apps/probability/base.pt.i18n | 1 -
 apps/regression/base.de.i18n  | 1 -
 apps/regression/base.en.i18n  | 1 -
 apps/regression/base.es.i18n  | 1 -
 apps/regression/base.fr.i18n  | 1 -
 apps/regression/base.pt.i18n  | 1 -
 apps/shared.de.i18n           | 1 +
 apps/shared.en.i18n           | 1 +
 apps/shared.es.i18n           | 1 +
 apps/shared.fr.i18n           | 1 +
 apps/shared.pt.i18n           | 1 +
 15 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/apps/probability/base.de.i18n b/apps/probability/base.de.i18n
index db0ec9c76..86bea6ee8 100644
--- a/apps/probability/base.de.i18n
+++ b/apps/probability/base.de.i18n
@@ -3,7 +3,6 @@ ProbaAppCapital = "WAHRSCHEINLICHKEIT"
 ChooseLaw = "Waehlen Sie eine Verteilung"
 Binomial = "Binomial"
 Uniforme = "Uniform"
-Exponential = "Exponential"
 Normal = "Normal"
 Poisson = "Poisson"
 BinomialLaw = "Binomialverteilung"
diff --git a/apps/probability/base.en.i18n b/apps/probability/base.en.i18n
index 508963c40..26643ba06 100644
--- a/apps/probability/base.en.i18n
+++ b/apps/probability/base.en.i18n
@@ -3,7 +3,6 @@ ProbaAppCapital = "PROBABILITY"
 ChooseLaw = "Choose the distribution"
 Binomial = "Binomial"
 Uniforme = "Uniform"
-Exponential = "Exponential"
 Normal = "Normal"
 Poisson = "Poisson"
 BinomialLaw = "Binomial distribution"
diff --git a/apps/probability/base.es.i18n b/apps/probability/base.es.i18n
index 5538fd8cd..e17606b75 100644
--- a/apps/probability/base.es.i18n
+++ b/apps/probability/base.es.i18n
@@ -3,7 +3,6 @@ ProbaAppCapital = "PROBABILIDAD"
 ChooseLaw = "Seleccionar la distribución"
 Binomial = "Binomial"
 Uniforme = "Uniforme"
-Exponential = "Exponencial"
 Normal = "Normal"
 Poisson = "Poisson"
 BinomialLaw = "Distribución binomial"
diff --git a/apps/probability/base.fr.i18n b/apps/probability/base.fr.i18n
index 500ab370d..0c07b56a1 100644
--- a/apps/probability/base.fr.i18n
+++ b/apps/probability/base.fr.i18n
@@ -3,7 +3,6 @@ ProbaAppCapital = "PROBABILITÉS"
 ChooseLaw = "Choisir le type de loi"
 Binomial = "Binomiale"
 Uniforme = "Uniforme"
-Exponential = "Exponentielle"
 Normal = "Normale"
 Poisson = "Poisson"
 BinomialLaw = "Loi binomiale"
diff --git a/apps/probability/base.pt.i18n b/apps/probability/base.pt.i18n
index 1915fdf7f..90e736e06 100644
--- a/apps/probability/base.pt.i18n
+++ b/apps/probability/base.pt.i18n
@@ -3,7 +3,6 @@ ProbaAppCapital = "PROBABILIDADE"
 ChooseLaw = "Selecionar a distribuição"
 Binomial = "Binomial"
 Uniforme = "Uniforme"
-Exponential = "Exponencial"
 Normal = "Normal"
 Poisson = "Poisson"
 BinomialLaw = "Distribuição binomial"
diff --git a/apps/regression/base.de.i18n b/apps/regression/base.de.i18n
index 7c49c2e7d..2e06f3bba 100644
--- a/apps/regression/base.de.i18n
+++ b/apps/regression/base.de.i18n
@@ -14,7 +14,6 @@ Quadratic = "Quadratische"
 Cubic = "Kubische"
 Quartic = "Biquadratische"
 Logarithmic = "Logarithmische"
-Exponential = "Exponentielle"
 Power = "Potenz"
 Trigonometrical = "Trigonometrische"
 Logistic = "Logistische"
diff --git a/apps/regression/base.en.i18n b/apps/regression/base.en.i18n
index 68d7ff816..891c30eb3 100644
--- a/apps/regression/base.en.i18n
+++ b/apps/regression/base.en.i18n
@@ -14,7 +14,6 @@ Quadratic = "Quadratic"
 Cubic = "Cubic"
 Quartic = "Quartic"
 Logarithmic = "Logarithmic"
-Exponential = "Exponential"
 Power = "Power"
 Trigonometrical = "Trigonometric"
 Logistic = "Logistic"
diff --git a/apps/regression/base.es.i18n b/apps/regression/base.es.i18n
index f7cdc25b0..15b0fff73 100644
--- a/apps/regression/base.es.i18n
+++ b/apps/regression/base.es.i18n
@@ -14,7 +14,6 @@ Quadratic = "Cuadrática"
 Cubic = "Cúbica"
 Quartic = "Cuártica"
 Logarithmic = "Logarítmica"
-Exponential = "Exponencial"
 Power = "Potencial"
 Trigonometrical = "Trigonométrica"
 Logistic = "Logística"
diff --git a/apps/regression/base.fr.i18n b/apps/regression/base.fr.i18n
index 0e6d2584a..0d24b1bd8 100644
--- a/apps/regression/base.fr.i18n
+++ b/apps/regression/base.fr.i18n
@@ -14,7 +14,6 @@ Quadratic = "Quadratique"
 Cubic = "Cubique"
 Quartic = "Quartique"
 Logarithmic = "Logarithmique"
-Exponential = "Exponentielle"
 Power = "Puissance"
 Trigonometrical = "Trigonométrique"
 Logistic = "Logistique"
diff --git a/apps/regression/base.pt.i18n b/apps/regression/base.pt.i18n
index 695352547..7ec8ab7b5 100644
--- a/apps/regression/base.pt.i18n
+++ b/apps/regression/base.pt.i18n
@@ -14,7 +14,6 @@ Quadratic = "Quadrática"
 Cubic = "Cúbica"
 Quartic = "Quarto grau"
 Logarithmic = "Logarítmica"
-Exponential = "Exponencial"
 Power = "Potência"
 Trigonometrical = "Trigonométrica"
 Logistic = "Logística"
diff --git a/apps/shared.de.i18n b/apps/shared.de.i18n
index 26fed1661..e2ff6f0c2 100644
--- a/apps/shared.de.i18n
+++ b/apps/shared.de.i18n
@@ -16,6 +16,7 @@ DisplayValues = "Werte anzeigen"
 Empty = "Leer"
 ExitExamMode1 = "Moechten Sie den Testmodus "
 ExitExamMode2 = "verlassen?"
+Exponential = "Exponentielle"
 FillWithFormula = "Mit einer Formel fuellen"
 ForbiddenValue = "Verbotener Wert"
 FunctionColumn = "0(0) Spalte"
diff --git a/apps/shared.en.i18n b/apps/shared.en.i18n
index 8cff681b6..625a37ec8 100644
--- a/apps/shared.en.i18n
+++ b/apps/shared.en.i18n
@@ -16,6 +16,7 @@ DisplayValues = "Display values"
 Empty = "Empty"
 ExitExamMode1 = "Exit the exam "
 ExitExamMode2 = "mode?"
+Exponential = "Exponential"
 FillWithFormula = "Fill with a formula"
 ForbiddenValue = "Forbidden value"
 FunctionColumn = "0(0) column"
diff --git a/apps/shared.es.i18n b/apps/shared.es.i18n
index 8ce9866b6..dda6b3622 100644
--- a/apps/shared.es.i18n
+++ b/apps/shared.es.i18n
@@ -16,6 +16,7 @@ DisplayValues = "Visualizar los valores"
 Empty = "Vacio"
 ExitExamMode1 = "Salir del modo "
 ExitExamMode2 = "examen ?"
+Exponential = "Exponencial"
 FillWithFormula = "Rellenar con una fórmula"
 ForbiddenValue = "Valor prohibido"
 FunctionColumn = "Columna 0(0)"
diff --git a/apps/shared.fr.i18n b/apps/shared.fr.i18n
index e89d81161..e07ab4d63 100644
--- a/apps/shared.fr.i18n
+++ b/apps/shared.fr.i18n
@@ -16,6 +16,7 @@ DisplayValues = "Afficher les valeurs"
 Empty = "Vide"
 ExitExamMode1 = "Voulez-vous sortir "
 ExitExamMode2 = "du mode examen ?"
+Exponential = "Exponentielle"
 FillWithFormula = "Remplir avec une formule"
 ForbiddenValue = "Valeur interdite"
 FunctionColumn = "Colonne 0(0)"
diff --git a/apps/shared.pt.i18n b/apps/shared.pt.i18n
index e04ba1c2a..6ea6a7d59 100644
--- a/apps/shared.pt.i18n
+++ b/apps/shared.pt.i18n
@@ -16,6 +16,7 @@ DisplayValues = "Exibir os valores"
 Empty = "Vácuo"
 ExitExamMode1 = "Você quer sair do modo de "
 ExitExamMode2 = "exame ?"
+Exponential = "Exponencial"
 FillWithFormula = "Preencher com uma fórmula"
 ForbiddenValue = "Valor proibida"
 FunctionColumn = "Coluna 0(0)"

From d2b9bdd616e930d9dfacd59595bfeef6c9666326 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 31 Jan 2019 17:24:33 +0100
Subject: [PATCH 083/295] [unicode] Clean typography (accents, non present
 glyphs...)

---
 apps/regression/graph_controller.cpp |   8 ++++----
 kandinsky/Makefile                   |   4 ++--
 kandinsky/fonts/LargeSourcePixel.otf | Bin 0 -> 211680 bytes
 kandinsky/fonts/LargeSourcePixel.ttf | Bin 220768 -> 0 bytes
 kandinsky/fonts/SmallSourcePixel.otf | Bin 0 -> 206008 bytes
 kandinsky/fonts/SmallSourcePixel.ttf | Bin 214268 -> 0 bytes
 kandinsky/fonts/code_points.h        |   3 ++-
 kandinsky/include/kandinsky/font.h   |   2 +-
 kandinsky/src/font.cpp               |   9 ++++++---
 9 files changed, 15 insertions(+), 11 deletions(-)
 create mode 100644 kandinsky/fonts/LargeSourcePixel.otf
 delete mode 100644 kandinsky/fonts/LargeSourcePixel.ttf
 create mode 100644 kandinsky/fonts/SmallSourcePixel.otf
 delete mode 100644 kandinsky/fonts/SmallSourcePixel.ttf

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 8a7895855..04be6f253 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -121,8 +121,8 @@ void GraphController::reloadBannerView() {
   double x = m_cursor->x();
   // Display a specific legend if the mean dot is selected
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    // \xCC\x84 represents the combining bar ' ̄'
-    legend = "x\xCC\x84=";
+    // \xCC\x85 represents the combining overline ' ̅'
+    legend = "x\xCC\x85=";
     x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   }
   numberOfChar += strlcpy(buffer, legend, bufferSize);
@@ -139,8 +139,8 @@ void GraphController::reloadBannerView() {
   legend = "y=";
   double y = m_cursor->y();
   if (*m_selectedDotIndex == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
-    // \xCC\x84 represents the combining bar ' ̄'
-    legend = "y\xCC\x84=";
+    // \xCC\x85 represents the combining overline ' ̅'
+    legend = "y\xCC\x85=";
     y = m_store->meanOfColumn(*m_selectedSeriesIndex, 1);
   }
   numberOfChar += strlcpy(buffer, legend, bufferSize);
diff --git a/kandinsky/Makefile b/kandinsky/Makefile
index 8389a12ad..fcb8533dd 100644
--- a/kandinsky/Makefile
+++ b/kandinsky/Makefile
@@ -47,13 +47,13 @@ RASTERIZER := $(BUILD_DIR)/kandinsky/fonts/rasterizer
 $(eval $(call rule_for, \
   RASTER, \
   kandinsky/fonts/SmallSourcePixel.cpp, \
-  kandinsky/fonts/SmallSourcePixel.ttf $$(RASTERIZER), \
+  kandinsky/fonts/SmallSourcePixel.otf $$(RASTERIZER), \
   $$(RASTERIZER) $$< 12 12 SmallFont $$@ \
 ))
 
 $(eval $(call rule_for, \
   RASTER, \
   kandinsky/fonts/LargeSourcePixel.cpp, \
-  kandinsky/fonts/LargeSourcePixel.ttf $$(RASTERIZER), \
+  kandinsky/fonts/LargeSourcePixel.otf $$(RASTERIZER), \
   $$(RASTERIZER) $$< 16 16 LargeFont $$@ \
 ))
diff --git a/kandinsky/fonts/LargeSourcePixel.otf b/kandinsky/fonts/LargeSourcePixel.otf
new file mode 100644
index 0000000000000000000000000000000000000000..af4a233736893110b786c13bae44017e82f8862d
GIT binary patch
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d@%})<;OYL}gu?Uu865FMKQvMsyhQA%{{xBUa*hB1

diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index 01c5bb6cb..aa5d997df 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -122,7 +122,7 @@ uint32_t CodePoints[] = {
   0x301, //  ́ // COMBINING ACUTE ACCENT
   0x302, //  ̂ // COMBINING CIRCUMFLEX ACCENT
   0x303, //  ̃ // COMBINING TILDE
-  0x304, //  ̄ // COMBINING MACRON
+  0x305, //  ̅ // COMBINING OVERLINE
   0x308, //  ̈ // COMBINING DIAERESIS
   0x30a, //  ̊ // COMBINING RING ABOVE
   0x327, //  ̧ // COMBINING CEDILLA
@@ -142,6 +142,7 @@ uint32_t CodePoints[] = {
   0x2248,  // ≈ // ALMOST EQUAL TO
   0x2264,  // ≤ // LESS-THAN OR EQUAL TO
   0x2265,  // ≥ // GREATER-THAN OR EQUAL TO
+  0xFFFD,  // � // REPLACEMENT CHARACTER
   0x1d422, // 𝐢 // MATHEMATICAL BOLD SMALL I"
 };
 
diff --git a/kandinsky/include/kandinsky/font.h b/kandinsky/include/kandinsky/font.h
index 0d47e9d4a..06d3dfe6d 100644
--- a/kandinsky/include/kandinsky/font.h
+++ b/kandinsky/include/kandinsky/font.h
@@ -21,7 +21,7 @@
  * kandinsky/fonts/code_points.h). To easily compute the index of a code point in
  * the CodePoints table, we use the m_table matching table: it contains the
  * CodePointIndexPairs of the first code point of each series of consecutive
- * code points in the CodePoints table. */
+ * code points in the CodePoints table. This table is create in rasterizer.c. */
 
 class KDFont {
 private:
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index 4915337c5..b13ace8ac 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -1,5 +1,6 @@
 #include <assert.h>
 #include <kandinsky/font.h>
+#include <kandinsky/fonts/code_points.h>
 #include <ion.h>
 #include <ion/unicode/utf8_decoder.h>
 
@@ -80,6 +81,8 @@ void KDFont::colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffe
 }
 
 KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
+  int defaultIndex = NumberOfCodePoints - 2;
+  assert(CodePoints[defaultIndex] == 0xFFFD);
 #define USE_BINARY_SEARCH 0
 #if USE_BINARY_SEARCH
   int lowerBound = 0;
@@ -133,7 +136,7 @@ KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
 #else
   const CodePointIndexPair * currentPair = m_table;
   if (c < currentPair->codePoint()) {
-    return 0;
+    return defaultIndex;
   }
   const CodePointIndexPair * endPair = m_table + m_tableLength - 1;
   while (currentPair < endPair) {
@@ -141,7 +144,7 @@ KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
     if (c < nextPair->codePoint()) {
       CodePoint lastCodePointOfCurrentPair = currentPair->codePoint() + (nextPair->glyphIndex() - currentPair->glyphIndex() - 1);
       if (c > lastCodePointOfCurrentPair) {
-        return 0;
+        return defaultIndex;
       }
       return currentPair->glyphIndex() + (c - currentPair->codePoint());
     }
@@ -150,6 +153,6 @@ KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
   if (endPair->codePoint() == c) {
     return endPair->glyphIndex();
   }
-  return 0;
+  return defaultIndex;
 #endif
 }

From b243fd1a992452450a14a57cd553973d2c5cda7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 1 Feb 2019 10:14:27 +0100
Subject: [PATCH 084/295] [unicode] Prevent upper case letters with accents

---
 apps/i18n.py | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/apps/i18n.py b/apps/i18n.py
index 8aee99be6..8aa0bf450 100644
--- a/apps/i18n.py
+++ b/apps/i18n.py
@@ -1,5 +1,9 @@
-# This script gather all .i18n files and aggregates them as a pair of .h/.cpp file
-# In practice, it enforces a NFKD normalization
+# -*- coding: utf-8 -*-
+
+# This script gathers all .i18n files and aggregates them as a pair of .h/.cpp
+# file.
+# In practice, it enforces a NFKD normalization. Because Epsilon does not
+# properly draw upper case letters with accents, we remove them here.
 # It works with Python 2 and Python 3
 
 import sys
@@ -9,7 +13,25 @@ import argparse
 import io
 
 def source_definition(i18n_string):
-    return (u"\"" + unicodedata.normalize("NFKD", i18n_string) + u"\"").encode("utf-8")
+    s = unicodedata.normalize("NFKD", i18n_string)
+    result = u"\""
+    i = 0
+    length = len(s)
+    checkForCombining = False
+    while i < length:
+        copyCodePoint = True
+        if checkForCombining:
+            # We remove combining code points, which are between 0x300 and 0x36F
+            # (for the non-extended set)
+            copyCodePoint = (ord(s[i]) < 0x300) or (ord(s[i]) > 0x36F)
+            checkForCombining = False
+        if copyCodePoint:
+            # Remove the uppercase characters with combining chars
+            checkForCombining = s[i].isupper()
+            result = result + s[i]
+        i = i+1
+    result = result + u"\""
+    return result.encode("utf-8")
 
 def split_line(line):
     match = re.match(r"^(\w+)\s*=\s*\"(.*)\"$", line)

From 5494cea1c7f08704e72ec988d5df761b4fa77859 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 1 Feb 2019 10:36:16 +0100
Subject: [PATCH 085/295] [unicode] Comment about avoiding accents in literals

---
 ion/include/ion/unicode/utf8_decoder.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/ion/include/ion/unicode/utf8_decoder.h b/ion/include/ion/unicode/utf8_decoder.h
index 430075a83..432b5c072 100644
--- a/ion/include/ion/unicode/utf8_decoder.h
+++ b/ion/include/ion/unicode/utf8_decoder.h
@@ -14,7 +14,19 @@
  * 0 and 7F         -> 0xxxxxxx
  * 80 and 7FF       -> 110xxxxx 10xxxxxx
  * 800 and FFFF     -> 1110xxxx 10xxxxxx 10xxxxxx
- * 10000 and 10FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
+ * 10000 and 10FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * WARNING: A single glyph can have several code point translations. For
+ * instance, 'ê' can be the code point 'e' followed by the code point '^', but
+ * it can also be the unique code point 'ê'. We assume NFKD normalization, where
+ * 'ê' will be 'e' followed by a combining code point '^'.
+ * The i18n literals are processed by i18n.py, where we enforce the NFKD
+ * normalization, but other string literals (for instance the script templates)
+ * will be encoded as the text editor chooses.
+ *
+ * /!\ All literals except the i18n should thus avoid containing ambiguous
+ *     glyphs such as accentuated letters.
+ */
 
 class UTF8Decoder {
 public:

From 07b22f44d28c7ff002bf1e5846f106488f914388 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 1 Feb 2019 11:56:45 +0100
Subject: [PATCH 086/295] [escher/text_field] Fix rect dirtying in setText

The content of the buffers might no be initialized before the setText,
so we cannot use reloadRectFromPosition, as it requires to perform
stringSize, which needs valid content.
---
 escher/src/text_field.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index eab7e828f..6b87cb0d5 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -53,7 +53,6 @@ const char * TextField::ContentView::text() const {
 }
 
 void TextField::ContentView::setText(const char * text) {
-  reloadRectFromPosition(m_textBuffer);
   size_t textRealLength = strlen(text);
   int textLength = minInt(textRealLength, m_textBufferSize - 1);
   // Copy the text
@@ -62,7 +61,7 @@ void TextField::ContentView::setText(const char * text) {
   if (m_isEditing || m_textBuffer == m_draftTextBuffer) {
     m_currentDraftTextLength = textLength;
   }
-  reloadRectFromPosition(m_textBuffer);
+  markRectAsDirty(bounds());
 }
 
 void TextField::ContentView::setAlignment(float horizontalAlignment, float verticalAlignment) {

From a2451aa104dc63b3f342ef9c71e3820ecbbe138e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Fri, 1 Feb 2019 12:07:51 +0100
Subject: [PATCH 087/295] [poincare/parser] Syntax error on combining code
 points

---
 poincare/src/parsing/tokenizer.cpp | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/poincare/src/parsing/tokenizer.cpp b/poincare/src/parsing/tokenizer.cpp
index 10ec5ef36..6c5b8c762 100644
--- a/poincare/src/parsing/tokenizer.cpp
+++ b/poincare/src/parsing/tokenizer.cpp
@@ -15,24 +15,16 @@ static inline bool isDigit(const CodePoint c) {
 
 const CodePoint Tokenizer::nextCodePoint(PopTest popTest, CodePoint context, bool * testResult) {
   UTF8Decoder decoder(m_text);
-  CodePoint firstCodePoint = decoder.nextCodePoint();
+  CodePoint c = decoder.nextCodePoint();
   const char * nextTextPosition = decoder.stringPosition();
-  if (firstCodePoint != UCodePointNull) {
-    CodePoint codePoint = decoder.nextCodePoint();
-    while (codePoint.isCombining()) {
-      nextTextPosition = decoder.stringPosition();
-      codePoint = decoder.nextCodePoint();
-    }
-  }
-  // TODO handle combined code points? For now the combining codepoints get dropped.
-  bool shouldPop = popTest(firstCodePoint, context);
+  bool shouldPop = popTest(c, context);
   if (testResult != nullptr) {
     *testResult = shouldPop;
   }
   if (shouldPop) {
     m_text = nextTextPosition;
   }
-  return firstCodePoint;
+  return c;
 }
 
 const CodePoint Tokenizer::popCodePoint() {
@@ -60,6 +52,8 @@ size_t Tokenizer::popWhile(PopTest popTest, CodePoint context) {
 }
 
 size_t Tokenizer::popIdentifier() {
+  /* TODO handle combined code points? For now combining code points will
+   * trigger a syntax error. */
   return popWhile([](CodePoint c, CodePoint context) { return isLetter(c) || isDigit(c) || c == context; }, '_');
 }
 

From d4feebc2c62572d5681489b6a9bdc2849070691b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 25 Feb 2019 11:18:29 +0100
Subject: [PATCH 088/295] [escher] Fix null termination for drawString in
 ScrollViewIndicator

---
 escher/src/scroll_view_indicator.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/escher/src/scroll_view_indicator.cpp b/escher/src/scroll_view_indicator.cpp
index 4e1eb3dec..be36a152b 100644
--- a/escher/src/scroll_view_indicator.cpp
+++ b/escher/src/scroll_view_indicator.cpp
@@ -94,7 +94,8 @@ void ScrollViewArrow::drawRect(KDContext * ctx, KDRect rect) const {
     (m_arrow == Top || m_arrow == Bottom) * (m_frame.width() - arrowSize.width()) / 2,
     (m_arrow == Left || m_arrow == Right) * (m_frame.height() - arrowSize.height()) / 2
   );
-  ctx->drawString(&m_arrow, arrowAlign, KDFont::LargeFont, m_color, m_backgroundColor, m_visible);
+  char arrowString[2] = {m_arrow, 0}; // TODO Change when code points
+  ctx->drawString(arrowString, arrowAlign, KDFont::LargeFont, m_color, m_backgroundColor, m_visible);
 }
 
 #if ESCHER_VIEW_LOGGING

From 3f0bdc66304baf87ee04c5361636fc7914ecc553 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 25 Feb 2019 15:19:00 +0100
Subject: [PATCH 089/295] [escher] Fix TextArea::handleEventWithText

It did not handle properly a new line (placed the cursor wrongly).
---
 escher/include/escher/text_area.h      |  1 -
 escher/src/text_area.cpp               | 89 ++++++++++++++------------
 ion/include/ion/unicode/utf8_helper.h  |  4 ++
 ion/src/shared/unicode/utf8_helper.cpp | 24 +++++++
 4 files changed, 75 insertions(+), 43 deletions(-)

diff --git a/escher/include/escher/text_area.h b/escher/include/escher/text_area.h
index 1cce3b495..5ae50a583 100644
--- a/escher/include/escher/text_area.h
+++ b/escher/include/escher/text_area.h
@@ -17,7 +17,6 @@ public:
 
 protected:
   int indentationBeforeCursor() const;
-  bool insertTextWithIndentation(const char * textBuffer, const char * location);
 
   class Text {
   public:
diff --git a/escher/src/text_area.cpp b/escher/src/text_area.cpp
index 7e9ece6e7..d8bf93d67 100644
--- a/escher/src/text_area.cpp
+++ b/escher/src/text_area.cpp
@@ -19,27 +19,62 @@ TextArea::TextArea(Responder * parentResponder, View * contentView, const KDFont
 {
 }
 
+static inline void InsertSpacesAtLocation(int spacesCount, char * buffer, int bufferSize) {
+  assert(buffer != nullptr);
+  assert(strlen(buffer) + spacesCount < bufferSize);
+
+  size_t sizeToMove = strlen(buffer) + 1;
+  size_t spaceCharSize = UTF8Decoder::CharSizeOfCodePoint(' ');
+  size_t spacesLength = spacesCount * spaceCharSize;
+  memmove(buffer + spacesLength, buffer, sizeToMove);
+  for (int i = 0; i < spacesCount; i++) {
+    int spaceOffset = i * spaceCharSize;
+    UTF8Decoder::CodePointToChars(' ', buffer + spaceOffset, bufferSize - spaceOffset);
+  }
+}
+
 bool TextArea::handleEventWithText(const char * text, bool indentation, bool forceCursorRightOfText) {
-  const char * nextCursorLocation = cursorLocation();
-
-  const char * cursorPositionInCommand = TextInputHelpers::CursorPositionInCommand(text);
-
   constexpr int bufferSize = TextField::maxBufferSize();
   char buffer[bufferSize];
 
+  size_t textLength = strlcpy(buffer, text, bufferSize);
+
+  // Add indentation spaces
+  if (indentation) {
+    // Compute the indentation
+    int spacesCount = indentationBeforeCursor();
+    const char * teaxtAreaBuffer = contentView()->text();
+    if (cursorLocation() > teaxtAreaBuffer && UTF8Helper::PreviousCodePointIs(teaxtAreaBuffer, cursorLocation(), ':')) {
+      spacesCount += k_indentationSpaces;
+    }
+
+    // Check the text will not overflow the buffer
+    int totalIndentationSize = UTF8Helper::CountOccurrences(text, '\n') * spacesCount;
+    if (contentView()->getText()->textLength() + textLength + totalIndentationSize >= contentView()->getText()->bufferSize() || textLength == 0) {
+      return false;
+    }
+
+    UTF8Helper::PerformAtCodePoints(
+        buffer, '\n',
+        [](int codePointOffset, void * text, int indentation) {
+          int offset = codePointOffset + UTF8Decoder::CharSizeOfCodePoint('\n');
+          InsertSpacesAtLocation(indentation, (char *)text + offset, TextField::maxBufferSize() - offset); //TODO
+        },
+        [](int c1, void * c2, int c3) {},
+        (void *)buffer,
+        spacesCount);
+  }
+  const char * cursorPositionInCommand = TextInputHelpers::CursorPositionInCommand(buffer);
+
   // Remove the Empty code points
-  UTF8Helper::CopyAndRemoveCodePoint(buffer, bufferSize, text, UCodePointEmpty, &cursorPositionInCommand);
+  UTF8Helper::RemoveCodePoint(buffer, UCodePointEmpty, &cursorPositionInCommand);
 
   // Insert the text
-  if ((indentation && insertTextWithIndentation(buffer, cursorLocation())) || insertTextAtLocation(buffer, cursorLocation())) {
+  if (insertTextAtLocation(buffer, cursorLocation())) {
     // Set the cursor location
-    if (forceCursorRightOfText) {
-      nextCursorLocation += strlen(buffer);
-    } else {
-      nextCursorLocation += cursorPositionInCommand - text;
-    }
+    const char * nextCursorLocation = cursorLocation() + (forceCursorRightOfText ? strlen(buffer) : cursorPositionInCommand - text);
+    setCursorLocation(nextCursorLocation);
   }
-  setCursorLocation(nextCursorLocation);
   return true;
 }
 
@@ -95,36 +130,6 @@ void TextArea::setText(char * textBuffer, size_t textBufferSize) {
   contentView()->moveCursorGeo(0, 0);
 }
 
-bool TextArea::insertTextWithIndentation(const char * textBuffer, const char * location) {
-  // Compute the indentation
-  int indentation = indentationBeforeCursor();
-  const char * buffer = contentView()->text();
-  if (cursorLocation() > buffer && UTF8Helper::PreviousCodePointIs(buffer, cursorLocation(), ':')) {
-    indentation += k_indentationSpaces;
-  }
-
-  // Check the text will not overflow the buffer
-  int totalIndentationSize = UTF8Helper::CountOccurrences(textBuffer, '\n') * indentation;
-  int textSize = strlen(textBuffer);
-  if (contentView()->getText()->textLength() + textSize + totalIndentationSize >= contentView()->getText()->bufferSize() || textSize == 0) {
-    return false;
-  }
-
-  // Insert the text
-  insertTextAtLocation(textBuffer, location);
-
-  // Insert the indentation
-  UTF8Helper::PerformAtCodePoints(
-      textBuffer, '\n',
-      [](int codePointOffset, void * text, int indentation) {
-        ((Text *)text)->insertSpacesAtLocation(indentation, const_cast<char *>(((Text *)text)->text() + codePointOffset + UTF8Decoder::CharSizeOfCodePoint('\n')));
-      },
-      [](int c1, void * c2, int c3) { },
-      (void *)(contentView()->getText()),
-      indentation);
-  return true;
-}
-
 int TextArea::indentationBeforeCursor() const {
   int indentationSize = 0;
   /* Compute the number of spaces at the beginning of the line. Increase the
diff --git a/ion/include/ion/unicode/utf8_helper.h b/ion/include/ion/unicode/utf8_helper.h
index 337c38f96..2a665f25c 100644
--- a/ion/include/ion/unicode/utf8_helper.h
+++ b/ion/include/ion/unicode/utf8_helper.h
@@ -22,6 +22,10 @@ const char * NotCodePointSearch(const char * s, CodePoint c, bool goingLeft = fa
  * termination of dst. */
 void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c, const char * * indexToDUpdate = nullptr);
 
+/* Remove all code points c. and update an index that should be lower if code
+ * points where removed before it. Ensure null-termination of dst. */
+void RemoveCodePoint(char * buffer, CodePoint c, const char * * indexToDUpdate = nullptr);
+
 /* Copy src into dst until end of dst or code point c, with null termination. Return the length of the copy */
 size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c);
 
diff --git a/ion/src/shared/unicode/utf8_helper.cpp b/ion/src/shared/unicode/utf8_helper.cpp
index 384db546b..51a8bf3ac 100644
--- a/ion/src/shared/unicode/utf8_helper.cpp
+++ b/ion/src/shared/unicode/utf8_helper.cpp
@@ -110,6 +110,30 @@ void CopyAndRemoveCodePoint(char * dst, size_t dstSize, const char * src, CodePo
   *(dst + minInt(bufferIndex, dstSize - 1)) = 0;
 }
 
+void RemoveCodePoint(char * buffer, CodePoint c, const char * * pointerToUpdate) {
+  UTF8Decoder decoder(buffer);
+  const char * currentPointer = buffer;
+  CodePoint codePoint = decoder.nextCodePoint();
+  const char * nextPointer = decoder.stringPosition();
+  size_t bufferIndex = 0;
+  size_t codePointCharSize = UTF8Decoder::CharSizeOfCodePoint(c);
+
+  while (codePoint != UCodePointNull) {
+    if (codePoint != c) {
+      int copySize = nextPointer - currentPointer;
+      memmove(buffer + bufferIndex, currentPointer, copySize);
+      bufferIndex+= copySize;
+    } else if (pointerToUpdate != nullptr && currentPointer < *pointerToUpdate) {
+      assert(*pointerToUpdate - buffer >= codePointCharSize);
+      *pointerToUpdate = *pointerToUpdate - codePointCharSize;
+    }
+    currentPointer = nextPointer;
+    codePoint = decoder.nextCodePoint();
+    nextPointer = decoder.stringPosition();
+  }
+  *(buffer + bufferIndex) = 0;
+}
+
 size_t CopyUntilCodePoint(char * dst, size_t dstSize, const char * src, CodePoint c) {
   UTF8Decoder decoder(src);
   const char * codePointPointer = decoder.stringPosition();

From 40c057f0eef3a89a014c19c46cd95f8b033867ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Feb 2019 10:27:12 +0100
Subject: [PATCH 090/295] [apps] Fix SumGraphController array size

---
 apps/shared/sum_graph_controller.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index deb279781..88311d378 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -241,7 +241,7 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
     char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sizeof(sigma)),
+        LayoutHelper::CodePointString(sigma, sigmaSize),
         LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont),
         EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, KDFont::SmallFont, false));
   } else {

From d0300c0e7f4532457c1aaf71f4e62fbd85317996 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 27 Feb 2019 17:12:37 +0100
Subject: [PATCH 091/295] [apps/settings] Reload the title bar when changing
 language

Before, the "Settings" title would not be immediately translated into
the new language.
---
 apps/apps_container.cpp             | 4 ++++
 apps/apps_container.h               | 1 +
 apps/apps_window.cpp                | 4 ++++
 apps/apps_window.h                  | 1 +
 apps/shared/language_controller.cpp | 4 +++-
 apps/title_bar_view.cpp             | 5 +++++
 apps/title_bar_view.h               | 1 +
 7 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/apps/apps_container.cpp b/apps/apps_container.cpp
index d5dd6ad98..d516af358 100644
--- a/apps/apps_container.cpp
+++ b/apps/apps_container.cpp
@@ -300,6 +300,10 @@ void AppsContainer::refreshPreferences() {
   m_window.refreshPreferences();
 }
 
+void AppsContainer::reloadTitleBarView() {
+  m_window.reloadTitleBarView();
+}
+
 void AppsContainer::displayExamModePopUp(bool activate) {
   m_examPopUpController.setActivatingExamMode(activate);
   activeApp()->displayModalViewController(&m_examPopUpController, 0.f, 0.f, Metric::ExamPopUpTopMargin, Metric::PopUpRightMargin, Metric::ExamPopUpBottomMargin, Metric::PopUpLeftMargin);
diff --git a/apps/apps_container.h b/apps/apps_container.h
index 5f23fbd1a..a46dcebfc 100644
--- a/apps/apps_container.h
+++ b/apps/apps_container.h
@@ -41,6 +41,7 @@ public:
   void run() override;
   bool updateBatteryState();
   void refreshPreferences();
+  void reloadTitleBarView();
   void displayExamModePopUp(bool activate);
   void shutdownDueToLowBattery();
   void setShiftAlphaStatus(Ion::Events::ShiftAlphaStatus newStatus);
diff --git a/apps/apps_window.cpp b/apps/apps_window.cpp
index 47cef825b..f3457f515 100644
--- a/apps/apps_window.cpp
+++ b/apps/apps_window.cpp
@@ -31,6 +31,10 @@ void AppsWindow::refreshPreferences() {
   m_titleBarView.refreshPreferences();
 }
 
+void AppsWindow::reloadTitleBarView() {
+  m_titleBarView.reload();
+}
+
 bool AppsWindow::updateAlphaLock() {
   return m_titleBarView.setShiftAlphaLockStatus(Ion::Events::shiftAlphaStatus());
 }
diff --git a/apps/apps_window.h b/apps/apps_window.h
index b3625c7c2..093d63d74 100644
--- a/apps/apps_window.h
+++ b/apps/apps_window.h
@@ -12,6 +12,7 @@ public:
   bool updateIsChargingState();
   bool updatePluggedState();
   void refreshPreferences();
+  void reloadTitleBarView();
   bool updateAlphaLock();
   void hideTitleBarView(bool hide);
 private:
diff --git a/apps/shared/language_controller.cpp b/apps/shared/language_controller.cpp
index 682806643..9dadb13a1 100644
--- a/apps/shared/language_controller.cpp
+++ b/apps/shared/language_controller.cpp
@@ -41,8 +41,10 @@ void LanguageController::viewWillAppear() {
 bool LanguageController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     GlobalPreferences::sharedGlobalPreferences()->setLanguage((I18n::Language)(selectedRow()+1));
+    /* We need to reload the whole title bar in order to translate both the
+     * "Settings" title and the degree preference. */
     AppsContainer * myContainer = (AppsContainer * )app()->container();
-    myContainer->refreshPreferences();
+    myContainer->reloadTitleBarView();
     return true;
   }
   return false;
diff --git a/apps/title_bar_view.cpp b/apps/title_bar_view.cpp
index 097895e57..b47c7f3a5 100644
--- a/apps/title_bar_view.cpp
+++ b/apps/title_bar_view.cpp
@@ -98,3 +98,8 @@ void TitleBarView::refreshPreferences() {
   // Layout the exam mode icon if needed
   layoutSubviews();
 }
+
+void TitleBarView::reload() {
+  refreshPreferences();
+  markRectAsDirty(bounds());
+}
diff --git a/apps/title_bar_view.h b/apps/title_bar_view.h
index b5335dc76..646b34415 100644
--- a/apps/title_bar_view.h
+++ b/apps/title_bar_view.h
@@ -16,6 +16,7 @@ public:
   bool setIsPlugged(bool isPlugged);
   bool setShiftAlphaLockStatus(Ion::Events::ShiftAlphaStatus status);
   void refreshPreferences();
+  void reload();
 private:
   constexpr static KDCoordinate k_alphaRightMargin = 5;
   constexpr static KDCoordinate k_examIconWidth = 18;

From b3d0de564a9e0f0228a2834fc9d0b8b9e04c0419 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 27 Feb 2019 17:13:46 +0100
Subject: [PATCH 092/295] [coding style] Small inlining

---
 escher/include/escher/window.h | 2 +-
 escher/src/window.cpp          | 5 -----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/escher/include/escher/window.h b/escher/include/escher/window.h
index 235416b46..931f07e3e 100644
--- a/escher/include/escher/window.h
+++ b/escher/include/escher/window.h
@@ -5,7 +5,7 @@
 
 class Window : public View {
 public:
-  Window();
+  Window() : m_contentView(nullptr) {}
   void redraw(bool force = false);
   void setContentView(View * contentView);
 protected:
diff --git a/escher/src/window.cpp b/escher/src/window.cpp
index 618b6fba4..15807f017 100644
--- a/escher/src/window.cpp
+++ b/escher/src/window.cpp
@@ -4,11 +4,6 @@ extern "C" {
 #include <assert.h>
 }
 
-Window::Window() :
-  m_contentView(nullptr)
-{
-}
-
 void Window::redraw(bool force) {
   if (force) {
     markRectAsDirty(bounds());

From 928aaa2575ffc4c2e15659b8e5900ab7fcbe5d52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Feb 2019 11:37:49 +0100
Subject: [PATCH 093/295] [poincare] Add tests on random

---
 poincare/Makefile        |  1 +
 poincare/test/random.cpp | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 poincare/test/random.cpp

diff --git a/poincare/Makefile b/poincare/Makefile
index d6a13b974..f9c3017bf 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -167,6 +167,7 @@ tests += $(addprefix poincare/test/,\
   power.cpp\
   properties.cpp\
   rational.cpp\
+  random.cpp\
   simplify.cpp\
   store.cpp\
   subtraction.cpp\
diff --git a/poincare/test/random.cpp b/poincare/test/random.cpp
new file mode 100644
index 000000000..6a40f8bd8
--- /dev/null
+++ b/poincare/test/random.cpp
@@ -0,0 +1,31 @@
+#include <quiz.h>
+#include <poincare/integer.h>
+#include <poincare/rational.h>
+#include <poincare/random.h>
+#include <assert.h>
+#include "helper.h"
+#include "tree/helpers.h"
+
+using namespace Poincare;
+
+QUIZ_CASE(poincare_random_simplify) {
+  assert_parsed_expression_simplify_to("1/random()+1/3+1/4", "1/random()+7/12");
+  assert_parsed_expression_simplify_to("random()+random()", "random()+random()");
+  assert_parsed_expression_simplify_to("random()-random()", "-random()+random()");
+  assert_parsed_expression_simplify_to("1/random()+1/3+1/4+1/random()", "1/random()+1/random()+7/12");
+  assert_parsed_expression_simplify_to("random()×random()", "random()×random()");
+  assert_parsed_expression_simplify_to("random()/random()", "random()/random()");
+  assert_parsed_expression_simplify_to("3^random()×3^random()", "3^random()×3^random()");
+  assert_parsed_expression_simplify_to("random()×ln(2)×3+random()×ln(2)×5", "5×ln(2)×random()+3×ln(2)×random()");
+}
+
+QUIZ_CASE(poincare_randint_simplify) {
+  assert_parsed_expression_simplify_to("1/randint(3,10)+1/3+1/4", "1/randint(3,10)+7/12");
+  assert_parsed_expression_simplify_to("randint(3,10)+randint(3,10)", "randint(3,10)+randint(3,10)");
+  assert_parsed_expression_simplify_to("randint(3,10)-randint(3,10)", "-randint(3,10)+randint(3,10)");
+  assert_parsed_expression_simplify_to("1/randint(3,10)+1/3+1/4+1/randint(3,10)", "1/randint(3,10)+1/randint(3,10)+7/12");
+  assert_parsed_expression_simplify_to("randint(3,10)×randint(3,10)", "randint(3,10)×randint(3,10)");
+  assert_parsed_expression_simplify_to("randint(3,10)/randint(3,10)", "randint(3,10)/randint(3,10)");
+  assert_parsed_expression_simplify_to("3^randint(3,10)×3^randint(3,10)", "3^randint(3,10)×3^randint(3,10)");
+  assert_parsed_expression_simplify_to("randint(3,10)×ln(2)×3+randint(3,10)×ln(2)×5", "5×ln(2)×randint(3,10)+3×ln(2)×randint(3,10)");
+}

From eea6e702ebd4be4046c9a6d8a3b16bc86298fb4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Feb 2019 13:50:22 +0100
Subject: [PATCH 094/295] [kandinsky] Fix font test

---
 kandinsky/fonts/code_points.h |  5 +++++
 kandinsky/src/font.cpp        |  1 +
 kandinsky/test/font.cpp       | 25 +++++++++++++++++++++----
 3 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index aa5d997df..50e3630f0 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -1,3 +1,6 @@
+#ifndef KANDINSKY_FONTS_CODE_POINTS_H
+#define KANDINSKY_FONTS_CODE_POINTS_H
+
 // [0x30a].map{|i| "0x" + i.to_s(16) +", // " + [i].pack("U") + " // " + Unicode::Name.of([i].pack("U"))}.join("|")
 #include <stdint.h>
 
@@ -147,3 +150,5 @@ uint32_t CodePoints[] = {
 };
 
 int NumberOfCodePoints = sizeof(CodePoints)/sizeof(CodePoints[0]);
+
+#endif
diff --git a/kandinsky/src/font.cpp b/kandinsky/src/font.cpp
index b13ace8ac..80d3b9896 100644
--- a/kandinsky/src/font.cpp
+++ b/kandinsky/src/font.cpp
@@ -82,6 +82,7 @@ void KDFont::colorizeGlyphBuffer(const RenderPalette * renderPalette, GlyphBuffe
 
 KDFont::GlyphIndex KDFont::indexForCodePoint(CodePoint c) const {
   int defaultIndex = NumberOfCodePoints - 2;
+  assert(defaultIndex == 132); // If not, change kandinsky/test/font.cpp
   assert(CodePoints[defaultIndex] == 0xFFFD);
 #define USE_BINARY_SEARCH 0
 #if USE_BINARY_SEARCH
diff --git a/kandinsky/test/font.cpp b/kandinsky/test/font.cpp
index 4c29c68d4..422df5c75 100644
--- a/kandinsky/test/font.cpp
+++ b/kandinsky/test/font.cpp
@@ -11,13 +11,30 @@ static constexpr KDFont::CodePointIndexPair table[] = {
 
 constexpr KDFont testFont(4, table, 10, 10, nullptr, nullptr);
 
-const KDFont::GlyphIndex index_for_code_point[] = {
-/* 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 */
-   0,  0,  0,  1,  2,  3,  0,  0,  0,  4,  0,  0,  5,  6,  7,  0
+constexpr int defaultIndex = 132; // Taken from KDFont::indexForCodePoint
+
+constexpr int numberOfTests = 16;
+const KDFont::GlyphIndex index_for_code_point[numberOfTests] = {
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   1,
+   2,
+   3,
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   4,
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
+   5,
+   6,
+   7,
+   static_cast<KDFont::GlyphIndex>(defaultIndex),
 };
 
 QUIZ_CASE(kandinsky_font_index_for_code_point) {
-  for (int i=0; i<16; i++) {
+  for (int i=0; i<numberOfTests; i++) {
     KDFont::GlyphIndex result = testFont.indexForCodePoint(i);
     quiz_assert(result == index_for_code_point[i]);
   }

From df57d6330d5421474c1ba1dd3b2f0b7e582aefc2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Feb 2019 14:33:24 +0100
Subject: [PATCH 095/295] [poincare/test] Fix test due to bigger printable
 decimals
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The max size of printed float is calculated to make 1.121212..ᴇ-308 fit
with 15 significant digits, but ᴇ now uses more than one char, which
makes more floats printable.
---
 poincare/test/convert_expression_to_text.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/poincare/test/convert_expression_to_text.cpp b/poincare/test/convert_expression_to_text.cpp
index 0d557cbb1..11114b6bf 100644
--- a/poincare/test/convert_expression_to_text.cpp
+++ b/poincare/test/convert_expression_to_text.cpp
@@ -269,8 +269,8 @@ QUIZ_CASE(poincare_approximation_to_text) {
   assert_expression_prints_to(Float<double>::Builder(1.2345E3), "1234.5", DecimalMode);
   assert_expression_prints_to(Float<double>::Builder(-1.2345E3), "-1234.5", DecimalMode);
   assert_expression_prints_to(Float<double>::Builder(0.99999999999995), "9.9999999999995ᴇ-1", ScientificMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(0.00000099999999999995), "9.9999999999995ᴇ-7", DecimalMode, 14);
-  assert_expression_prints_to(Float<double>::Builder(0.0000009999999999901200121020102010201201201021099995), "9.9999999999012ᴇ-7", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(0.00000000099999999999995), "9.9999999999995ᴇ-10", DecimalMode, 14);
+  assert_expression_prints_to(Float<double>::Builder(0.0000000009999999999901200121020102010201201201021099995), "9.9999999999012ᴇ-10", DecimalMode, 14);
   assert_expression_prints_to(Float<float>::Builder(1.2345E-1), "0.12345", DecimalMode);
   assert_expression_prints_to(Float<float>::Builder(1), "1", DecimalMode);
   assert_expression_prints_to(Float<float>::Builder(0.9999999999999995), "1", DecimalMode);

From 210ec62cab3c5224005a850c48948477b27a55cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Feb 2019 17:02:31 +0100
Subject: [PATCH 096/295] [poincare] Do not simplify random nor randint

For instance, random()+random() is simplified into random()+random(),
not 2*random()
---
 poincare/include/poincare/addition.h        |  2 +-
 poincare/include/poincare/expression.h      |  2 +
 poincare/include/poincare/expression_node.h |  1 +
 poincare/include/poincare/randint.h         |  1 +
 poincare/include/poincare/random.h          |  1 +
 poincare/src/addition.cpp                   | 47 +++++++++++++++++----
 poincare/src/expression.cpp                 | 16 +++++++
 poincare/src/multiplication.cpp             | 26 +++++++++---
 8 files changed, 81 insertions(+), 15 deletions(-)

diff --git a/poincare/include/poincare/addition.h b/poincare/include/poincare/addition.h
index 6a0c3d44b..6f8d50988 100644
--- a/poincare/include/poincare/addition.h
+++ b/poincare/include/poincare/addition.h
@@ -73,7 +73,7 @@ private:
   static inline int NumberOfNonNumeralFactors(const Expression & e);
   static inline const Expression FirstNonNumeralFactor(const Expression & e);
 
-  static bool TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const Expression & e2);
+  static bool TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const Expression & e2, Context & context);
   Expression factorizeOnCommonDenominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   void factorizeChildrenAtIndexesInPlace(int index1, int index2, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
   AdditionNode * node() const { return static_cast<AdditionNode *>(Expression::node()); }
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index e5c20b901..2e55c0543 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -126,6 +126,8 @@ public:
   bool isNumber() const { return node()->isNumber(); }
   bool isRationalZero() const;
   bool isRationalOne() const;
+  bool isRandom() const { return node()->isRandom(); }
+  static bool IsRandom(const Expression e, Context & context, bool replaceSymbols);
   typedef bool (*ExpressionTest)(const Expression e, Context & context, bool replaceSymbols);
   bool recursivelyMatches(ExpressionTest test, Context & context, bool replaceSymbols) const;
   bool isApproximate(Context & context) const;
diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index 372da561c..86ef3a646 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -114,6 +114,7 @@ public:
   };
   virtual Sign sign(Context * context) const { return Sign::Unknown; }
   virtual bool isNumber() const { return false; }
+  virtual bool isRandom() const { return false; }
   /*!*/ virtual Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
   /*!*/ virtual Expression replaceUnknown(const Symbol & symbol);
   /*!*/ virtual Expression setSign(Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
diff --git a/poincare/include/poincare/randint.h b/poincare/include/poincare/randint.h
index 6d1b93516..ef2004b60 100644
--- a/poincare/include/poincare/randint.h
+++ b/poincare/include/poincare/randint.h
@@ -22,6 +22,7 @@ public:
 
   // Complex
   bool isReal(Context & context) const override { return true; }
+  bool isRandom() const override { return true; }
 
 private:
   // Layout
diff --git a/poincare/include/poincare/random.h b/poincare/include/poincare/random.h
index b1982bceb..8fdd3f44d 100644
--- a/poincare/include/poincare/random.h
+++ b/poincare/include/poincare/random.h
@@ -20,6 +20,7 @@ public:
 
   // Complex
   bool isReal(Context & context) const override { return true; }
+  bool isRandom() const override { return true; }
 
   // Properties
   Type type() const override { return Type::Random; }
diff --git a/poincare/src/addition.cpp b/poincare/src/addition.cpp
index 98a2f4928..942cf5189 100644
--- a/poincare/src/addition.cpp
+++ b/poincare/src/addition.cpp
@@ -224,7 +224,7 @@ Expression Addition::shallowReduce(Context & context, Preferences::ComplexFormat
       removeChildAtIndexInPlace(i+1);
       continue;
     }
-    if (TermsHaveIdenticalNonNumeralFactors(e1, e2)) {
+    if (TermsHaveIdenticalNonNumeralFactors(e1, e2, context)) {
       factorizeChildrenAtIndexesInPlace(i, i+1, context, complexFormat, angleUnit, target);
       continue;
     }
@@ -316,9 +316,10 @@ const Expression Addition::FirstNonNumeralFactor(const Expression & e) {
   return e.childAtIndex(0);
 }
 
-bool Addition::TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const Expression & e2) {
+bool Addition::TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const Expression & e2, Context & context) {
   /* Return true if two expressions differ only by a rational factor. For
-   * example, 2*pi and pi do, 2*pi and 2*ln(2) don't. */
+   * example, 2*pi and pi do, 2*pi and 2*ln(2) don't. We do not want to
+   * factorize random(). */
 
   int numberOfNonNumeralFactorsInE1 = NumberOfNonNumeralFactors(e1);
   int numberOfNonNumeralFactorsInE2 = NumberOfNonNumeralFactors(e2);
@@ -329,6 +330,10 @@ bool Addition::TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const
 
   int numberOfNonNumeralFactors = numberOfNonNumeralFactorsInE1;
   if (numberOfNonNumeralFactors == 1) {
+    Expression nonNumeralFactor = FirstNonNumeralFactor(e1);
+    if (nonNumeralFactor.recursivelyMatches(Expression::IsRandom, context, true)) {
+      return false;
+    }
     return FirstNonNumeralFactor(e1).isIdenticalTo(FirstNonNumeralFactor(e2));
   } else {
     assert(numberOfNonNumeralFactors > 1);
@@ -337,19 +342,37 @@ bool Addition::TermsHaveIdenticalNonNumeralFactors(const Expression & e1, const
 }
 
 Expression Addition::factorizeOnCommonDenominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
-  // We want to turn (a/b+c/d+e/b) into (a*d+b*c+e*d)/(b*d)
+  /* We want to turn (a/b+c/d+e/b) into (a*d+b*c+e*d)/(b*d), except if one of
+   * the denominators contains random, in which case the factors with random
+   * should stay appart. */
+
+  /* a will store the random factors, which should not be put to the same
+   * denominator. */
+  Addition a = Addition::Builder();
 
   // Step 1: We want to compute the common denominator, b*d
   Multiplication commonDenominator = Multiplication::Builder();
   for (int i = 0; i < numberOfChildren(); i++) {
-    Expression currentDenominator = childAtIndex(i).denominator(context, complexFormat, angleUnit);
+    Expression childI = childAtIndex(i);
+    Expression currentDenominator = childI.denominator(context, complexFormat, angleUnit);
     if (!currentDenominator.isUninitialized()) {
+      if (currentDenominator.recursivelyMatches(Expression::IsRandom, context, true)) {
+        // Remove "random" factors
+        removeChildInPlace(childI, childI.numberOfChildren());
+        a.addChildAtIndexInPlace(childI, a.numberOfChildren(), a.numberOfChildren());
+        i--;
+        continue;
+      }
       // Make commonDenominator = LeastCommonMultiple(commonDenominator, denominator);
       commonDenominator.addMissingFactors(currentDenominator, context, complexFormat, angleUnit);
     }
   }
   if (commonDenominator.numberOfChildren() == 0) {
     // If commonDenominator is empty this means that no child was a fraction.
+    while (a.numberOfChildren() > 0) {
+      // Put back the "random" children
+      addChildAtIndexInPlace(a.childAtIndex(0), numberOfChildren(), numberOfChildren());
+    }
     return *this;
   }
 
@@ -373,9 +396,17 @@ Expression Addition::factorizeOnCommonDenominator(Context & context, Preferences
   inverseDenominator.deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
 
   /* Step 6: We simplify the resulting multiplication forbidding any
-   * distribution of multiplication on additions (to avoid an infinite loop). */
-  replaceWithInPlace(result);
-  return result.privateShallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, false, true);
+   * distribution of multiplication on additions (to avoid an infinite loop).
+   * Handle the removed random factors. */
+  int aChildrenCount = a.numberOfChildren();
+  if (aChildrenCount == 0) {
+    replaceWithInPlace(result);
+    return result.privateShallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, false, true);
+  }
+  a.addChildAtIndexInPlace(result, aChildrenCount, aChildrenCount);
+  result.privateShallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, false, true);
+  replaceWithInPlace(a);
+  return a;
 }
 
 void Addition::factorizeChildrenAtIndexesInPlace(int index1, int index2, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 4b0078525..6702e3f4b 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -110,6 +110,22 @@ bool Expression::isApproximate(Context & context) const {
         }, context, true);
 }
 
+bool Expression::IsRandom(const Expression e, Context & context, bool replaceSymbols) {
+  return e.isRandom()
+    || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
+        && replaceSymbols
+        && SymbolAbstract::matches(
+            static_cast<const Symbol&>(e),
+            [](const Expression e, Context & context, bool replaceSymbols) {
+              return e.recursivelyMatches(
+                  [](const Expression e, Context & context, bool replaceSymbols) {
+                    return Expression::IsRandom(e, context, replaceSymbols);
+                  },
+                  context, replaceSymbols);
+            },
+            context));
+}
+
 bool Expression::IsMatrix(const Expression e, Context & context, bool replaceSymbols) {
   return e.type() == ExpressionNode::Type::Matrix
     || e.type() == ExpressionNode::Type::ConfidenceInterval
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index b7e86690c..155d11dc1 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -356,6 +356,11 @@ Expression Multiplication::privateShallowReduce(Context & context, Preferences::
   while (i < numberOfChildren()-1) {
     Expression oi = childAtIndex(i);
     Expression oi1 = childAtIndex(i+1);
+    if (oi.recursivelyMatches(Expression::IsRandom, context, true)) {
+      // Do not factorize random or randint
+      i++;
+      continue;
+    }
     if (TermsHaveIdenticalBase(oi, oi1)) {
       bool shouldFactorizeBase = true;
       if (TermHasNumeralBase(oi)) {
@@ -377,7 +382,7 @@ Expression Multiplication::privateShallowReduce(Context & context, Preferences::
   }
 
   /* Step 4: We look for terms of form sin(x)^p*cos(x)^q with p, q rational of
-   *opposite signs. We replace them by either:
+   * opposite signs. We replace them by either:
    * - tan(x)^p*cos(x)^(p+q) if |p|<|q|
    * - tan(x)^(-q)*sin(x)^(p+q) otherwise */
   if (target == ExpressionNode::ReductionTarget::User) {
@@ -465,9 +470,14 @@ Expression Multiplication::privateShallowReduce(Context & context, Preferences::
    * the parent is a multiplication or if the reduction is done bottom up to
    * avoid missing factorization such as (x+y)^(-1)*((a+b)*(x+y)).
    * Note: This step must be done after Step 4, otherwise we wouldn't be able to
-   * reduce expressions such as (x+y)^(-1)*(x+y)(a+b). */
+   * reduce expressions such as (x+y)^(-1)*(x+y)(a+b).
+   * If there is a random somewhere, do not expand. */
   Expression p = parent();
-  if (shouldExpand && (p.isUninitialized() || p.type() != ExpressionNode::Type::Multiplication)) {
+  bool hasRandom = recursivelyMatches(Expression::IsRandom, context, true);
+  if (shouldExpand
+      && (p.isUninitialized() || p.type() != ExpressionNode::Type::Multiplication)
+      && !hasRandom)
+  {
     for (int i = 0; i < numberOfChildren(); i++) {
       if (childAtIndex(i).type() == ExpressionNode::Type::Addition) {
         return distributeOnOperandAtIndex(i, context, complexFormat, angleUnit, target);
@@ -488,8 +498,9 @@ Expression Multiplication::privateShallowReduce(Context & context, Preferences::
    *   complex expression could not be resolved as a ComplexCartesian, we cannot
    *   do anything about it now (allChildrenAreReal == -1)
    * - All children are either real or ComplexCartesian (allChildrenAreReal == 0)
-   *   We can bubble up ComplexCartesian nodes. */
-  if (allChildrenAreReal(context) == 0) {
+   *   We can bubble up ComplexCartesian nodes.
+   * Do not simplify if there are randoms !*/
+  if (!hasRandom && allChildrenAreReal(context) == 0) {
     int nbChildren = numberOfChildren();
     int i = nbChildren-1;
     // Children are sorted so ComplexCartesian nodes are at the end
@@ -708,7 +719,10 @@ bool Multiplication::HaveSameNonNumeralFactors(const Expression & e1, const Expr
   int firstNonNumeralOperand1 = e1.childAtIndex(0).isNumber() ? 1 : 0;
   int firstNonNumeralOperand2 = e2.childAtIndex(0).isNumber() ? 1 : 0;
   for (int i = 0; i < numberOfNonNumeralFactors1; i++) {
-    if (!(e1.childAtIndex(firstNonNumeralOperand1+i).isIdenticalTo(e2.childAtIndex(firstNonNumeralOperand2+i)))) {
+    Expression currentChild1 = e1.childAtIndex(firstNonNumeralOperand1+i);
+    if (currentChild1.isRandom()
+        || !(currentChild1.isIdenticalTo(e2.childAtIndex(firstNonNumeralOperand2+i))))
+    {
       return false;
     }
   }

From 8466d5b124b593fe919cec73188ce889f15468ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 4 Mar 2019 10:48:07 +0100
Subject: [PATCH 097/295] [poincare] Rational::createLyt gives single
 CodePointLyt if possible

This reduces the size of created layouts, thus allowing more layouts to
be created, as there is a limit on the number of layout in a lyout field
---
 poincare/include/poincare/integer.h | 4 ++--
 poincare/src/integer.cpp            | 9 ++++++++-
 poincare/src/rational.cpp           | 4 ++--
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/poincare/include/poincare/integer.h b/poincare/include/poincare/integer.h
index 11aea50db..ce940e225 100644
--- a/poincare/include/poincare/integer.h
+++ b/poincare/include/poincare/integer.h
@@ -96,8 +96,8 @@ public:
   // Serialization
   int serialize(char * buffer, int bufferSize) const;
 
-  //Layout
-  HorizontalLayout createLayout() const;
+  // Layout
+  Layout createLayout() const;
 
   // Approximation
   template<typename T> T approximate() const;
diff --git a/poincare/src/integer.cpp b/poincare/src/integer.cpp
index 2c38ce69c..a28e19e0b 100644
--- a/poincare/src/integer.cpp
+++ b/poincare/src/integer.cpp
@@ -1,7 +1,9 @@
 #include <poincare/integer.h>
+#include <poincare/code_point_layout.h>
 #include <poincare/ieee754.h>
 #include <poincare/layout_helper.h>
 #include <poincare/serialization_helper.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <ion/unicode/utf8_helper.h>
 #include <cmath>
 #include <utility>
@@ -202,9 +204,14 @@ int Integer::serialize(char * buffer, int bufferSize) const {
 
 // Layout
 
-HorizontalLayout Integer::createLayout() const {
+Layout Integer::createLayout() const {
   char buffer[k_maxNumberOfDigitsBase10];
   int numberOfChars = serialize(buffer, k_maxNumberOfDigitsBase10);
+  assert(numberOfChars >= 1);
+  if ((int)UTF8Decoder::CharSizeOfCodePoint(buffer[0]) == numberOfChars) {
+    UTF8Decoder decoder = UTF8Decoder(buffer);
+    return CodePointLayout::Builder(decoder.nextCodePoint());
+  }
   return LayoutHelper::String(buffer, numberOfChars);
 }
 
diff --git a/poincare/src/rational.cpp b/poincare/src/rational.cpp
index e5e9ee87a..e94eecd6d 100644
--- a/poincare/src/rational.cpp
+++ b/poincare/src/rational.cpp
@@ -96,11 +96,11 @@ Expression RationalNode::setSign(Sign s, Context * context, Preferences::Complex
 // Layout
 
 Layout RationalNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  HorizontalLayout numeratorLayout = signedNumerator().createLayout();
+  Layout numeratorLayout = signedNumerator().createLayout();
   if (denominator().isOne()) {
     return numeratorLayout;
   }
-  HorizontalLayout denominatorLayout = denominator().createLayout();
+  Layout denominatorLayout = denominator().createLayout();
   return FractionLayout::Builder(numeratorLayout, denominatorLayout);
 }
 

From 69aad40c89bfb57b8590d6ae29c66ff6e140c8d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 4 Mar 2019 11:58:11 +0100
Subject: [PATCH 098/295] [poincare] Make GridLayout rendering faster

---
 poincare/include/poincare/layout_node.h |  1 +
 poincare/include/poincare/tree_node.h   | 12 +++-
 poincare/src/grid_layout.cpp            | 79 +++++++++++++++----------
 poincare/src/matrix_layout.cpp          | 63 ++++++++++++++------
 4 files changed, 105 insertions(+), 50 deletions(-)

diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index 0475c14ce..bfa3aaa9c 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -124,6 +124,7 @@ protected:
 
   // Tree
   Direct<LayoutNode> children() { return Direct<LayoutNode>(this); }
+  Direct<LayoutNode> childrenFromIndex(int i) { return Direct<LayoutNode>(this, i); }
 
   // Sizing and positioning
   virtual KDSize computeSize() = 0;
diff --git a/poincare/include/poincare/tree_node.h b/poincare/include/poincare/tree_node.h
index 26b9efb57..dc207e45f 100644
--- a/poincare/include/poincare/tree_node.h
+++ b/poincare/include/poincare/tree_node.h
@@ -98,7 +98,7 @@ public:
   template <typename T>
   class Direct final {
   public:
-    Direct(const T * node) : m_node(const_cast<T *>(node)) {}
+    Direct(const T * node, int firstIndex = 0) : m_node(const_cast<T *>(node)), m_firstIndex(firstIndex) {}
     class Iterator : public TreeNode::Iterator<T> {
     public:
       using TreeNode::Iterator<T>::Iterator;
@@ -107,10 +107,17 @@ public:
         return *this;
       }
     };
-    Iterator begin() const { return Iterator(static_cast<T *>(m_node->next())); }
+    Iterator begin() const {
+      TreeNode * n = m_node->next();
+      for (int i = 0; i < m_firstIndex; i++) {
+        n = n->nextSibling();
+      }
+      return Iterator(static_cast<T *>(n));
+    }
     Iterator end() const { return Iterator(static_cast<T *>(m_node->nextSibling())); }
   private:
     T * m_node;
+    int m_firstIndex;
   };
 
   template <typename T>
@@ -155,6 +162,7 @@ protected:
     m_parentIdentifier(NoNodeIdentifier),
     m_referenceCounter(0)
   {}
+
 private:
   void updateParentIdentifierInChildren() const {
     changeParentIdentifierInChildren(m_identifier);
diff --git a/poincare/src/grid_layout.cpp b/poincare/src/grid_layout.cpp
index 218ea48c0..f41270699 100644
--- a/poincare/src/grid_layout.cpp
+++ b/poincare/src/grid_layout.cpp
@@ -43,7 +43,8 @@ void GridLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * shouldRecompu
     cursor->setLayoutNode(childAtIndex(0));
     return;
   }
-  int childIndex = indexOfChild(cursor->layoutNode());
+  LayoutNode * cursorNode = cursor->layoutNode();
+  int childIndex = indexOfChild(cursorNode);
   if (childIndex >= 0 && cursor->position() == LayoutCursor::Position::Right) {
     // Case: The cursor points to a grid's child.
     if (childIsRightOfGrid(childIndex)) {
@@ -52,7 +53,7 @@ void GridLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * shouldRecompu
       return;
     }
     // Case: Right of another child. Go Left of its sibling on the right.
-    cursor->setLayoutNode(childAtIndex(childIndex + 1));
+    cursor->setLayoutNode(static_cast<LayoutNode *>(cursorNode->nextSibling()));
     cursor->setPosition(LayoutCursor::Position::Left);
     return;
   }
@@ -66,10 +67,10 @@ void GridLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * shouldRecompu
 
 void GridLayoutNode::moveCursorUp(LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
   /* If the cursor is child that is not on the top row, move it inside its upper
-   * neighbour.*/
+   * neighbour. */
   int childIndex = m_numberOfColumns;
-  while (childIndex < numberOfChildren()) {
-    if (cursor->layoutNode()->hasAncestor(childAtIndex(childIndex), true)) {
+  for (LayoutNode * l : childrenFromIndex(childIndex)) {
+    if (cursor->layoutNode()->hasAncestor(l, true)) {
       childAtIndex(childIndex - m_numberOfColumns)->moveCursorUpInDescendants(cursor, shouldRecomputeLayout);
       return;
     }
@@ -80,12 +81,16 @@ void GridLayoutNode::moveCursorUp(LayoutCursor * cursor, bool * shouldRecomputeL
 
 void GridLayoutNode::moveCursorDown(LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
   int childIndex = 0;
-  while (childIndex < numberOfChildren() - m_numberOfColumns) {
-    if (cursor->layoutNode()->hasAncestor(childAtIndex(childIndex), true)) {
+  int maxIndex = numberOfChildren() - m_numberOfColumns;
+  for (LayoutNode * l : children()) {
+    if (cursor->layoutNode()->hasAncestor(l, true)) {
       childAtIndex(childIndex + m_numberOfColumns)->moveCursorDownInDescendants(cursor, shouldRecomputeLayout);
       return;
     }
     childIndex++;
+    if (childIndex >= maxIndex) {
+      break;
+    }
   }
   LayoutNode::moveCursorDown(cursor, shouldRecomputeLayout, equivalentPositionVisited);
 }
@@ -191,17 +196,9 @@ KDCoordinate GridLayoutNode::computeBaseline() {
 }
 
 KDPoint GridLayoutNode::positionOfChild(LayoutNode * l) {
-  int rowIndex = 0;
-  int columnIndex = 0;
-  for (int i = 0; i < m_numberOfRows; i++) {
-    for (int j = 0; j < m_numberOfColumns; j++) {
-      if (l == childAtIndex(i*m_numberOfColumns+j)) {
-        rowIndex = i;
-        columnIndex = j;
-        break;
-      }
-    }
-  }
+  int childIndex = indexOfChild(l);
+  int rowIndex = rowAtChildIndex(childIndex);
+  int columnIndex = columnAtChildIndex(childIndex);
   KDCoordinate x = 0;
   for (int j = 0; j < columnIndex; j++) {
     x += columnWidth(j);
@@ -218,21 +215,33 @@ KDPoint GridLayoutNode::positionOfChild(LayoutNode * l) {
 // Private
 
 KDCoordinate GridLayoutNode::rowBaseline(int i) {
+  assert(m_numberOfColumns > 0);
   KDCoordinate rowBaseline = 0;
-  for (int j = 0; j < m_numberOfColumns; j++) {
-    rowBaseline = maxCoordinate(rowBaseline, childAtIndex(i*m_numberOfColumns+j)->baseline());
+  int j = 0;
+  for (LayoutNode * l : childrenFromIndex(i*m_numberOfColumns)) {
+    rowBaseline = maxCoordinate(rowBaseline, l->baseline());
+    j++;
+    if (j >= m_numberOfColumns) {
+      break;
+    }
   }
   return rowBaseline;
 }
 
 KDCoordinate GridLayoutNode::rowHeight(int i) const {
-  KDCoordinate rowHeight = 0;
-  KDCoordinate baseline = const_cast<GridLayoutNode *>(this)->rowBaseline(i);
-  for (int j = 0; j < m_numberOfColumns; j++) {
-    LayoutNode * currentChild = const_cast<GridLayoutNode *>(this)->childAtIndex(i*m_numberOfColumns+j);
-    rowHeight = maxCoordinate(rowHeight, currentChild->layoutSize().height() - currentChild->baseline());
+  KDCoordinate underBaseline = 0;
+  KDCoordinate aboveBaseline = 0;
+  int j = 0;
+  for (LayoutNode * l : const_cast<GridLayoutNode *>(this)->childrenFromIndex(i*m_numberOfColumns)) {
+    KDCoordinate b = l->baseline();
+    underBaseline = maxCoordinate(underBaseline, l->layoutSize().height() - b);
+    aboveBaseline = maxCoordinate(aboveBaseline, b);
+    j++;
+    if (j >= m_numberOfColumns) {
+      break;
+    }
   }
-  return baseline+rowHeight;
+  return aboveBaseline+underBaseline;
 }
 
 KDCoordinate GridLayoutNode::height() const {
@@ -240,14 +249,22 @@ KDCoordinate GridLayoutNode::height() const {
   for (int i = 0; i < m_numberOfRows; i++) {
     totalHeight += rowHeight(i);
   }
-  totalHeight += maxCoordinate((m_numberOfRows-1)*k_gridEntryMargin, 0);
+  totalHeight += m_numberOfRows > 0 ? (m_numberOfRows-1)*k_gridEntryMargin : 0;
   return totalHeight;
 }
 
 KDCoordinate GridLayoutNode::columnWidth(int j) const {
   KDCoordinate columnWidth = 0;
-  for (int i = 0; i < m_numberOfRows; i++) {
-    columnWidth = maxCoordinate(columnWidth, const_cast<GridLayoutNode *>(this)->childAtIndex(i*m_numberOfColumns+j)->layoutSize().width());
+  int childIndex = j;
+  int lastIndex = (m_numberOfRows-1)*m_numberOfColumns + j;
+  for (LayoutNode * l : const_cast<GridLayoutNode *>(this)->childrenFromIndex(j)) {
+    if (childIndex%m_numberOfColumns == j) {
+      columnWidth = maxCoordinate(columnWidth, l->layoutSize().width());
+      if (childIndex >= lastIndex) {
+        break;
+      }
+    }
+    childIndex++;
   }
   return columnWidth;
 }
@@ -257,7 +274,7 @@ KDCoordinate GridLayoutNode::width() const {
   for (int j = 0; j < m_numberOfColumns; j++) {
     totalWidth += columnWidth(j);
   }
-  totalWidth += maxCoordinate(0, (m_numberOfColumns-1)*k_gridEntryMargin);
+  totalWidth += m_numberOfColumns > 0 ? (m_numberOfColumns-1)*k_gridEntryMargin : 0;
   return totalWidth;
 }
 
@@ -268,4 +285,4 @@ void GridLayout::setDimensions(int rows, int columns) {
   setNumberOfColumns(columns);
 }
 
-}
\ No newline at end of file
+}
diff --git a/poincare/src/matrix_layout.cpp b/poincare/src/matrix_layout.cpp
index a5d565c6a..659b3682f 100644
--- a/poincare/src/matrix_layout.cpp
+++ b/poincare/src/matrix_layout.cpp
@@ -142,12 +142,17 @@ void MatrixLayoutNode::moveCursorVertically(VerticalDirection direction, LayoutC
   bool shouldRemoveGreySquares = false;
   int firstIndex = direction == VerticalDirection::Up ? 0 : numberOfChildren() - m_numberOfColumns;
   int lastIndex = direction == VerticalDirection::Up ? m_numberOfColumns : numberOfChildren();
-  for (int childIndex = firstIndex; childIndex < lastIndex; childIndex++) {
-    if (cursor->layoutReference().hasAncestor(thisRef.childAtIndex(childIndex), true)) {
+  int i = firstIndex;
+  for (LayoutNode * l : childrenFromIndex(firstIndex)) {
+    if (i >= lastIndex) {
+      break;
+    }
+    if (cursor->layoutReference().node()->hasAncestor(l, true)) {
       // The cursor is leaving the matrix, so remove the grey squares.
       shouldRemoveGreySquares = true;
       break;
     }
+    i++;
   }
   GridLayoutNode::moveCursorVertically(direction, cursor, shouldRecomputeLayout, equivalentPositionVisited);
   if (cursor->isDefined() && shouldRemoveGreySquares) {
@@ -160,30 +165,43 @@ void MatrixLayoutNode::moveCursorVertically(VerticalDirection direction, LayoutC
 // Private
 
 void MatrixLayoutNode::newRowOrColumnAtIndex(int index) {
-  assert(index >= 0 && index < m_numberOfColumns*m_numberOfRows);
+  assert(index >= 0 && index < m_numberOfColumns * m_numberOfRows);
   bool shouldAddNewRow = childIsBottomOfGrid(index); // We need to compute this boolean before modifying the layout
   int correspondingRow = rowAtChildIndex(index);
   if (childIsRightOfGrid(index)) {
+    assert(m_numberOfRows >= 2);
     // Color the grey EmptyLayouts of the column in yellow.
     int correspondingColumn = m_numberOfColumns - 1;
-    for (int i = 0; i < m_numberOfRows - 1; i++) {
-      LayoutNode * lastLayoutOfRow = childAtIndex(i*m_numberOfColumns+correspondingColumn);
-      if (lastLayoutOfRow->isEmpty()) {
-        if (!lastLayoutOfRow->isHorizontal()) {
-          static_cast<EmptyLayoutNode *>(lastLayoutOfRow)->setColor(EmptyLayoutNode::Color::Yellow);
-        } else {
-          assert(lastLayoutOfRow->numberOfChildren() == 1);
-          static_cast<EmptyLayoutNode *>(lastLayoutOfRow->childAtIndex(0))->setColor(EmptyLayoutNode::Color::Yellow);
+    int childIndex = correspondingColumn;
+    int maxIndex = (m_numberOfRows - 2)*m_numberOfColumns+correspondingColumn;
+    for (LayoutNode * lastLayoutOfRow : childrenFromIndex(correspondingColumn)) {
+      if (childIndex > maxIndex) {
+        break;
+      }
+      if (childIndex % m_numberOfColumns == correspondingColumn) {
+        if (lastLayoutOfRow->isEmpty()) {
+          if (!lastLayoutOfRow->isHorizontal()) {
+            static_cast<EmptyLayoutNode *>(lastLayoutOfRow)->setColor(EmptyLayoutNode::Color::Yellow);
+          } else {
+            assert(lastLayoutOfRow->numberOfChildren() == 1);
+            static_cast<EmptyLayoutNode *>(lastLayoutOfRow->childAtIndex(0))->setColor(EmptyLayoutNode::Color::Yellow);
+          }
         }
       }
+      childIndex++;
     }
     // Add a column of grey EmptyLayouts on the right.
     addEmptyColumn(EmptyLayoutNode::Color::Grey);
   }
   if (shouldAddNewRow) {
+    assert(m_numberOfColumns >= 2);
     // Color the grey EmptyLayouts of the row in yellow.
-    for (int i = 0; i < m_numberOfColumns - 1; i++) {
-      LayoutNode * lastLayoutOfColumn = childAtIndex(correspondingRow*m_numberOfColumns+i);
+    int childIndex = correspondingRow * m_numberOfColumns;
+    int maxIndex = correspondingRow * m_numberOfColumns + m_numberOfColumns - 2;
+    for (LayoutNode * lastLayoutOfColumn : childrenFromIndex(correspondingRow*m_numberOfColumns)) {
+      if (childIndex > maxIndex) {
+        break;
+      }
       if (lastLayoutOfColumn->isEmpty()) {
         if (!lastLayoutOfColumn->isHorizontal()) {
           static_cast<EmptyLayoutNode *>(lastLayoutOfColumn)->setColor(EmptyLayoutNode::Color::Yellow);
@@ -192,6 +210,7 @@ void MatrixLayoutNode::newRowOrColumnAtIndex(int index) {
           static_cast<EmptyLayoutNode *>(lastLayoutOfColumn->childAtIndex(0))->setColor(EmptyLayoutNode::Color::Yellow);
         }
       }
+      childIndex++;
     }
     // Add a row of grey EmptyLayouts at the bottom.
     addEmptyRow(EmptyLayoutNode::Color::Grey);
@@ -200,20 +219,30 @@ void MatrixLayoutNode::newRowOrColumnAtIndex(int index) {
 
 bool MatrixLayoutNode::isRowEmpty(int index) const {
   assert(index >= 0 && index < m_numberOfRows);
-  for (int i = index * m_numberOfColumns; i < (index+1) * m_numberOfColumns; i++) {
-    if (!const_cast<MatrixLayoutNode *>(this)->childAtIndex(i)->isEmpty()) {
+  int i = index * m_numberOfColumns;
+  for (LayoutNode * l : const_cast<MatrixLayoutNode *>(this)->childrenFromIndex(index * m_numberOfColumns)) {
+    if (i >= (index + 1) * m_numberOfColumns) {
+      break;
+    }
+    if (!l->isEmpty()) {
       return false;
     }
+    i++;
   }
   return true;
 }
 
 bool MatrixLayoutNode::isColumnEmpty(int index) const {
   assert(index >= 0 && index < m_numberOfColumns);
-  for (int i = index; i < m_numberOfRows * m_numberOfColumns; i+= m_numberOfColumns) {
-    if (!const_cast<MatrixLayoutNode *>(this)->childAtIndex(i)->isEmpty()) {
+  int i = index;
+  for (LayoutNode * l : const_cast<MatrixLayoutNode *>(this)->childrenFromIndex(index)) {
+    if (i > index + (m_numberOfRows - 1) * m_numberOfColumns) {
+      break;
+    }
+    if (i % m_numberOfColumns == index && !l->isEmpty()) {
       return false;
     }
+    i++;
   }
   return true;
 }

From 067577ea02fa1fbbc7bf40dae4b0f4cf262d3746 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 16:43:03 +0100
Subject: [PATCH 099/295] [escher] Avoid unnecessary relayouts

---
 escher/src/view.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/escher/src/view.cpp b/escher/src/view.cpp
index 6ba058589..829a77779 100644
--- a/escher/src/view.cpp
+++ b/escher/src/view.cpp
@@ -132,7 +132,9 @@ void View::setFrame(KDRect frame) {
   markRectAsDirty(bounds());
   // FIXME: m_dirtyRect = bounds(); would be more correct (in case the view is being shrinked)
 
-  layoutSubviews();
+  if (!m_frame.isEmpty()) {
+    layoutSubviews();
+  }
 }
 
 KDPoint View::pointFromPointInView(View * view, KDPoint point) {

From cc0ae5559b77f660400da070dd0da6ab43d302ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 21 Feb 2019 12:50:29 +0100
Subject: [PATCH 100/295] [apps/shared] Change name StorageExpressionModel -->
 ExpressionModelHandle

---
 .../storage_cartesian_function_store.cpp      |  2 +-
 apps/graph/storage_cartesian_function_store.h |  2 +-
 apps/shared/Makefile                          |  2 +-
 ..._model.cpp => expression_model_handle.cpp} | 28 +++++++++----------
 ...sion_model.h => expression_model_handle.h} | 10 +++----
 ...orage_expression_model_list_controller.cpp | 12 ++++----
 ...storage_expression_model_list_controller.h |  2 +-
 .../shared/storage_expression_model_store.cpp |  8 +++---
 apps/shared/storage_expression_model_store.h  | 14 +++++-----
 apps/shared/storage_function.h                |  6 ++--
 apps/shared/storage_function_store.h          |  4 +--
 11 files changed, 45 insertions(+), 45 deletions(-)
 rename apps/shared/{storage_expression_model.cpp => expression_model_handle.cpp} (77%)
 rename apps/shared/{storage_expression_model.h => expression_model_handle.h} (85%)

diff --git a/apps/graph/storage_cartesian_function_store.cpp b/apps/graph/storage_cartesian_function_store.cpp
index d09072e4c..ecf878b1a 100644
--- a/apps/graph/storage_cartesian_function_store.cpp
+++ b/apps/graph/storage_cartesian_function_store.cpp
@@ -20,7 +20,7 @@ void StorageCartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion:
   m_functions[cacheIndex] = StorageCartesianFunction(record);
 }
 
-StorageExpressionModel * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
+ExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < k_maxNumberOfMemoizedModels);
   return &m_functions[cacheIndex];
 }
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index 449b17f9d..06a69b1ea 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -17,7 +17,7 @@ private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Shared::GlobalContext::funcExtension; }
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::StorageExpressionModel * memoizedModelAtIndex(int cacheIndex) const override;
+  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
   mutable Shared::StorageCartesianFunction m_functions[k_maxNumberOfMemoizedModels];
 };
 
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index 93e7e4d52..bc6af6116 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -11,6 +11,7 @@ app_src += $(addprefix apps/shared/,\
   editable_cell_table_view_controller.cpp \
   expression_field_delegate_app.cpp \
   expression_model.cpp \
+  expression_model_handle.cpp \
   expression_model_list_controller.cpp \
   expression_model_store.cpp \
   float_parameter_controller.cpp \
@@ -52,7 +53,6 @@ app_src += $(addprefix apps/shared/,\
   separator_even_odd_buffer_text_cell.cpp \
   simple_interactive_curve_view_controller.cpp \
   storage_cartesian_function.cpp \
-  storage_expression_model.cpp \
   storage_expression_model_list_controller.cpp \
   storage_expression_model_store.cpp \
   storage_function.cpp \
diff --git a/apps/shared/storage_expression_model.cpp b/apps/shared/expression_model_handle.cpp
similarity index 77%
rename from apps/shared/storage_expression_model.cpp
rename to apps/shared/expression_model_handle.cpp
index bfb274c7b..a0ccf79c9 100644
--- a/apps/shared/storage_expression_model.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -1,4 +1,4 @@
-#include "storage_expression_model.h"
+#include "expression_model_handle.h"
 #include "global_context.h"
 #include "poincare_helpers.h"
 #include <poincare/horizontal_layout.h>
@@ -11,7 +11,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageExpressionModel::StorageExpressionModel(Storage::Record record) :
+ExpressionModelHandle::ExpressionModelHandle(Storage::Record record) :
   Storage::Record(record),
   m_expression(),
   m_layout(),
@@ -19,7 +19,7 @@ StorageExpressionModel::StorageExpressionModel(Storage::Record record) :
 {
 }
 
-void StorageExpressionModel::text(char * buffer, size_t bufferSize) const {
+void ExpressionModelHandle::text(char * buffer, size_t bufferSize) const {
   Expression e = expressionClone();
   if (e.isUninitialized() && bufferSize > 0) {
     buffer[0] = 0;
@@ -28,14 +28,14 @@ void StorageExpressionModel::text(char * buffer, size_t bufferSize) const {
   }
 }
 
-bool StorageExpressionModel::isCircularlyDefined(Poincare::Context * context) const {
+bool ExpressionModelHandle::isCircularlyDefined(Poincare::Context * context) const {
   if (m_circular == -1) {
     m_circular = Expression::ExpressionWithoutSymbols(expressionClone(), *context).isUninitialized();
   }
   return m_circular;
 }
 
-Expression StorageExpressionModel::expressionReduced(Poincare::Context * context) const {
+Expression ExpressionModelHandle::expressionReduced(Poincare::Context * context) const {
   if (m_expression.isUninitialized()) {
     assert(!isNull());
     Ion::Storage::Record::Data recordData = value();
@@ -49,14 +49,14 @@ Expression StorageExpressionModel::expressionReduced(Poincare::Context * context
   return m_expression;
 }
 
-Expression StorageExpressionModel::expressionClone() const {
+Expression ExpressionModelHandle::expressionClone() const {
   assert(!isNull());
   Ion::Storage::Record::Data recordData = value();
   /* A new Expression has to be created at each call (because it might be tempered with after calling) */
   return Expression::ExpressionFromAddress(expressionAddressForValue(recordData), expressionSizeForValue(recordData));
 }
 
-Layout StorageExpressionModel::layout() {
+Layout ExpressionModelHandle::layout() {
   if (m_layout.isUninitialized()) {
     m_layout = PoincareHelpers::CreateLayout(expressionClone());
     if (m_layout.isUninitialized()) {
@@ -66,21 +66,21 @@ Layout StorageExpressionModel::layout() {
   return m_layout;
 }
 
-bool StorageExpressionModel::isDefined() {
+bool ExpressionModelHandle::isDefined() {
   return !isEmpty();
 }
 
-bool StorageExpressionModel::isEmpty() {
+bool ExpressionModelHandle::isEmpty() {
   return value().size <= metaDataSize();
 }
 
-void StorageExpressionModel::tidy() {
+void ExpressionModelHandle::tidy() {
   m_layout = Layout();
   m_expression = Expression();
   m_circular = 0;
 }
 
-Ion::Storage::Record::ErrorStatus StorageExpressionModel::setContent(const char * c) {
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(const char * c) {
   Expression expressionToStore;
   // if c = "", we want to reinit the Expression
   if (c && *c != 0) {
@@ -93,7 +93,7 @@ Ion::Storage::Record::ErrorStatus StorageExpressionModel::setContent(const char
   return setExpressionContent(expressionToStore);
 }
 
-Ion::Storage::Record::ErrorStatus StorageExpressionModel::setExpressionContent(Expression & expressionToStore) {
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Expression & expressionToStore) {
   assert(!isNull());
   // Prepare the new data to store
   Ion::Storage::Record::Data newData = value();
@@ -120,11 +120,11 @@ Ion::Storage::Record::ErrorStatus StorageExpressionModel::setExpressionContent(E
   return error;
 }
 
-void * StorageExpressionModel::expressionAddressForValue(Ion::Storage::Record::Data recordData) const {
+void * ExpressionModelHandle::expressionAddressForValue(Ion::Storage::Record::Data recordData) const {
   return (char *)recordData.buffer+metaDataSize();
 }
 
-size_t StorageExpressionModel::expressionSizeForValue(Ion::Storage::Record::Data recordData) const {
+size_t ExpressionModelHandle::expressionSizeForValue(Ion::Storage::Record::Data recordData) const {
   return recordData.size-metaDataSize();
 }
 
diff --git a/apps/shared/storage_expression_model.h b/apps/shared/expression_model_handle.h
similarity index 85%
rename from apps/shared/storage_expression_model.h
rename to apps/shared/expression_model_handle.h
index 899e119f8..0edb27278 100644
--- a/apps/shared/storage_expression_model.h
+++ b/apps/shared/expression_model_handle.h
@@ -1,5 +1,5 @@
-#ifndef SHARED_STORAGE_EXPRESSION_MODEL_H
-#define SHARED_STORAGE_EXPRESSION_MODEL_H
+#ifndef SHARED_EXPRESSION_MODEL_HANDLE_H
+#define SHARED_EXPRESSION_MODEL_HANDLE_H
 
 #include <poincare/context.h>
 #include <poincare/expression.h>
@@ -8,12 +8,12 @@
 
 namespace Shared {
 
-// StorageExpressionModel is a handle to Ion::Record
+// ExpressionModelHandle is a handle to Ion::Record
 
-class StorageExpressionModel : public Ion::Storage::Record {
+class ExpressionModelHandle : public Ion::Storage::Record {
   // TODO find better name (once we remove ExpressionModel?)
 public:
-  StorageExpressionModel(Ion::Storage::Record record);
+  ExpressionModelHandle(Ion::Storage::Record record);
   void text(char * buffer, size_t bufferSize) const;
   Poincare::Expression expressionReduced(Poincare::Context * context) const;
   Poincare::Expression expressionClone() const;
diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 1569b3881..bd6aab110 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -109,7 +109,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
   if (isAddEmptyRow(j)) {
     return Metric::StoreRowHeight;
   }
-  ExpiringPointer<StorageExpressionModel> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   if (m->layout().isUninitialized()) {
     return Metric::StoreRowHeight;
   }
@@ -120,7 +120,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
 
 void StorageExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   EvenOddExpressionCell * myCell = (EvenOddExpressionCell *)cell;
-  ExpiringPointer<StorageExpressionModel> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   myCell->setLayout(m->layout());
 }
 
@@ -140,7 +140,7 @@ bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::
   }
   if (event == Ion::Events::Backspace && !isAddEmptyRow(selectedRow())) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<StorageExpressionModel> model =  modelStore()->modelForRecord(record);
+    ExpiringPointer<ExpressionModelHandle> model =  modelStore()->modelForRecord(record);
     if (model->shouldBeClearedBeforeRemove()) {
       reinitExpression(model);
     } else {
@@ -170,7 +170,7 @@ void StorageExpressionModelListController::addEmptyModel() {
   editExpression(Ion::Events::OK);
 }
 
-void StorageExpressionModelListController::reinitExpression(ExpiringPointer<StorageExpressionModel> model) {
+void StorageExpressionModelListController::reinitExpression(ExpiringPointer<ExpressionModelHandle> model) {
   model->setContent("");
   resetMemoization();
   selectableTableView()->reloadData();
@@ -182,7 +182,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
   char initialTextContent[initialTextContentMaxSize];
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<StorageExpressionModel> model = modelStore()->modelForRecord(record);
+    ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
     model->text(initialTextContent, initialTextContentMaxSize);
     initialText = initialTextContent;
     // Replace Poincare::Symbol::SpecialSymbols::UnknownX with 'x'
@@ -208,7 +208,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
 
 bool StorageExpressionModelListController::editSelectedRecordWithText(const char * text) {
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-  ExpiringPointer<StorageExpressionModel> model = modelStore()->modelForRecord(record);
+  ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
   return (model->setContent(text) == Ion::Storage::Record::ErrorStatus::None);
 }
 
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index d2bdfb43d..3248ac0fd 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -24,7 +24,7 @@ protected:
   bool handleEventOnExpression(Ion::Events::Event event);
   virtual void addEmptyModel();
   virtual void didChangeModelsList() { resetMemoization(); }
-  virtual void reinitExpression(ExpiringPointer<StorageExpressionModel> model);
+  virtual void reinitExpression(ExpiringPointer<ExpressionModelHandle> model);
   virtual void editExpression(Ion::Events::Event event);
   virtual bool editSelectedRecordWithText(const char * text);
   virtual bool removeModelRow(Ion::Storage::Record record);
diff --git a/apps/shared/storage_expression_model_store.cpp b/apps/shared/storage_expression_model_store.cpp
index a08913ac5..82ac68e7c 100644
--- a/apps/shared/storage_expression_model_store.cpp
+++ b/apps/shared/storage_expression_model_store.cpp
@@ -15,14 +15,14 @@ Ion::Storage::Record StorageExpressionModelStore::recordAtIndex(int i) const {
   return Ion::Storage::sharedStorage()->recordWithExtensionAtIndex(modelExtension(), i);
 }
 
-StorageExpressionModel * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
+ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
   for (int i = 0; i < k_maxNumberOfMemoizedModels; i++) {
     if (!memoizedModelAtIndex(i)->isNull() && *memoizedModelAtIndex(i) == record) {
       return memoizedModelAtIndex(i);
     }
   }
   setMemoizedModelAtIndex(m_oldestMemoizedIndex, record);
-  StorageExpressionModel * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
+  ExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
   m_oldestMemoizedIndex = (m_oldestMemoizedIndex+1) % k_maxNumberOfMemoizedModels;
   return result;
 }
@@ -44,7 +44,7 @@ void StorageExpressionModelStore::tidy() {
 int StorageExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) const {
   int result = 0;
   int i = 0;
-  StorageExpressionModel * m = privateModelForRecord(recordAtIndex(i++));
+  ExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
   while (!m->isNull()) {
     if (test(m)) {
       result++;
@@ -59,7 +59,7 @@ Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(in
   int index = 0;
   int currentModelIndex = 0;
   Ion::Storage::Record r = recordAtIndex(currentModelIndex++);
-  StorageExpressionModel * m = privateModelForRecord(r);
+  ExpressionModelHandle * m = privateModelForRecord(r);
   while (!m->isNull()) {
     assert(currentModelIndex <= numberOfModels());
     if (test(m)) {
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/storage_expression_model_store.h
index f6d6e3d51..0b19c057b 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/storage_expression_model_store.h
@@ -1,7 +1,7 @@
 #ifndef SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 #define SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 
-#include "storage_expression_model.h"
+#include "expression_model_handle.h"
 #include "expiring_pointer.h"
 #include <ion/storage.h>
 #include <assert.h>
@@ -17,10 +17,10 @@ public:
 
   // Getters
   int numberOfModels() const;
-  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](StorageExpressionModel * m) { return m->isDefined(); }); }
+  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined(); }); }
   Ion::Storage::Record recordAtIndex(int i) const;
-  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](StorageExpressionModel * m) { return m->isDefined(); }); }
-  ExpiringPointer<StorageExpressionModel> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<StorageExpressionModel>(privateModelForRecord(record)); }
+  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined(); }); }
+  ExpiringPointer<ExpressionModelHandle> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<ExpressionModelHandle>(privateModelForRecord(record)); }
 
   // Add and Remove
   virtual Ion::Storage::Record::ErrorStatus addEmptyModel() = 0;
@@ -32,14 +32,14 @@ public:
   void storageDidChangeForRecord(const Ion::Storage::Record record) const { resetMemoizedModelsExceptRecord(record); }
 protected:
   constexpr static int k_maxNumberOfMemoizedModels = 10;
-  typedef bool (*ModelTest)(StorageExpressionModel * model);
+  typedef bool (*ModelTest)(ExpressionModelHandle * model);
   int numberOfModelsSatisfyingTest(ModelTest test) const;
   Ion::Storage::Record recordStatifyingTestAtIndex(int i, ModelTest test) const;
-  StorageExpressionModel * privateModelForRecord(Ion::Storage::Record record) const;
+  ExpressionModelHandle * privateModelForRecord(Ion::Storage::Record record) const;
 private:
   void resetMemoizedModelsExceptRecord(const Ion::Storage::Record record = Ion::Storage::Record()) const;
   virtual void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record) const = 0;
-  virtual StorageExpressionModel * memoizedModelAtIndex(int cacheIndex) const = 0;
+  virtual ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const = 0;
   virtual const char * modelExtension() const = 0;
   /* Memoization of k_maxNumberOfMemoizedModels. When the required model is not
    * present, we override the m_oldestMemoizedIndex model. This actually
diff --git a/apps/shared/storage_function.h b/apps/shared/storage_function.h
index 853f2a804..45596bbc7 100644
--- a/apps/shared/storage_function.h
+++ b/apps/shared/storage_function.h
@@ -2,11 +2,11 @@
 #define SHARED_STORAGE_FUNCTION_H
 
 #include <poincare/function.h>
-#include "storage_expression_model.h"
+#include "expression_model_handle.h"
 
 namespace Shared {
 
-class StorageFunction : public StorageExpressionModel {
+class StorageFunction : public ExpressionModelHandle {
 public:
   enum class NameNotCompliantError {
     None = 0,
@@ -20,7 +20,7 @@ public:
   static bool BaseNameCompliant(const char * baseName, NameNotCompliantError * error = nullptr);
 
   // Constructors
-  StorageFunction(Ion::Storage::Record record) : StorageExpressionModel(record){}
+  StorageFunction(Ion::Storage::Record record) : ExpressionModelHandle(record){}
 
   // Properties
   bool isActive() const;
diff --git a/apps/shared/storage_function_store.h b/apps/shared/storage_function_store.h
index acccd4975..a5b08608e 100644
--- a/apps/shared/storage_function_store.h
+++ b/apps/shared/storage_function_store.h
@@ -14,8 +14,8 @@ public:
   StorageFunctionStore() : StorageExpressionModelStore() {}
   uint32_t storeChecksum();
   // An active function must be defined to be counted
-  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](StorageExpressionModel * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
-  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](StorageExpressionModel * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
+  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
+  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
 
   ExpiringPointer<StorageFunction> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<StorageFunction>(static_cast<StorageFunction *>(privateModelForRecord(record))); }
 

From 39709e53dae473d1a0857eb7eea319e14198613b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 21 Feb 2019 17:34:55 +0100
Subject: [PATCH 101/295] [solver] Make Equation inherits from
 ExpressionModelHandle instead of ExpressionModel

---
 apps/shared/expression_model_handle.cpp | 12 +++++----
 apps/shared/expression_model_handle.h   |  6 +++++
 apps/solver/equation.cpp                | 34 ++++++++++---------------
 apps/solver/equation.h                  | 15 ++++++-----
 4 files changed, 35 insertions(+), 32 deletions(-)

diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index a0ccf79c9..2faf4339e 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -74,12 +74,16 @@ bool ExpressionModelHandle::isEmpty() {
   return value().size <= metaDataSize();
 }
 
-void ExpressionModelHandle::tidy() {
+void ExpressionModelHandle::tidyExpressionModel() {
   m_layout = Layout();
   m_expression = Expression();
   m_circular = 0;
 }
 
+void ExpressionModelHandle::tidy() {
+  tidyExpressionModel();
+}
+
 Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(const char * c) {
   Expression expressionToStore;
   // if c = "", we want to reinit the Expression
@@ -113,10 +117,8 @@ Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ex
   }
   /* We cannot call tidy here because tidy is a virtual function and does not
    * do the same thing for all children class. And here we want to delete only
-   * the m_layout and m_expression. */
-  m_layout = Layout();
-  m_expression = Expression();
-  m_circular = 0;
+   * the elements relative to the ExpressionModel. */
+  tidyExpressionModel();
   return error;
 }
 
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index 0edb27278..4a90f529d 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -26,7 +26,13 @@ public:
   virtual bool isDefined();
   virtual bool isEmpty();
   virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
+  /* tidy is responsible to tidy the whole model whereas tidyExpressionModel
+   * tidies only the members associated with the ExpressionModel. In
+   * ExpressionModelHandle, tidy and tidyExpressionModel trigger the same
+   * behaviour but it is not true for its child classes (for example, in
+   * Sequence). */
   virtual void tidy();
+  virtual void tidyExpressionModel();
   virtual Ion::Storage::Record::ErrorStatus setContent(const char * c);
   Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e);
 protected:
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index fa10a8c09..af923c078 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -1,4 +1,5 @@
 #include "equation.h"
+#include <poincare/constant.h>
 #include <poincare/equal.h>
 #include <poincare/undefined.h>
 #include <poincare/unreal.h>
@@ -6,29 +7,27 @@
 #include <ion/unicode/utf8_helper.h>
 
 using namespace Poincare;
+using namespace Shared;
 
 namespace Solver {
 
-Equation::Equation() :
-  Shared::ExpressionModel(),
+constexpr char Equation::extension[];
+
+Equation::Equation(Ion::Storage::Record record) :
+  ExpressionModelHandle(record),
   m_standardForm()
 {
 }
 
-void Equation::setContent(const char * c) {
-  /* ExpressionModel::setContent takes care of tidying m_expression and m_layout. */
-  tidyStandardForm();
-  ExpressionModel::setContent(c);
-}
-
-void Equation::tidy() {
-  ExpressionModel::tidy();
-  tidyStandardForm();
+void Equation::tidyExpressionModel() {
+  ExpressionModelHandle::tidyExpressionModel();
+  // Free the pool of the m_standardForm
+  m_standardForm = Expression();
 }
 
 Expression Equation::standardForm(Context * context) const {
   if (m_standardForm.isUninitialized()) {
-    const Expression e = expression(context);
+    const Expression e = expressionReduced(context);
     if (e.type() == ExpressionNode::Type::Unreal) {
       m_standardForm = Unreal::Builder();
       return m_standardForm;
@@ -39,7 +38,7 @@ Expression Equation::standardForm(Context * context) const {
     }
     if (e.type() == ExpressionNode::Type::Equal) {
       Preferences * preferences = Preferences::sharedPreferences();
-      m_standardForm = static_cast<const Equal&>(e).standardEquation(*context, Expression::UpdatedComplexFormatWithTextInput(preferences->complexFormat(), text()), preferences->angleUnit());
+      m_standardForm = static_cast<const Equal&>(e).standardEquation(*context, Expression::UpdatedComplexFormatWithExpressionInput(preferences->complexFormat(), expressionClone(), *context), preferences->angleUnit());
     } else {
       assert(e.type() == ExpressionNode::Type::Rational && static_cast<const Rational&>(e).isOne());
       // The equality was reduced which means the equality was always true.
@@ -49,13 +48,8 @@ Expression Equation::standardForm(Context * context) const {
   return m_standardForm;
 }
 
-bool Equation::containsIComplex() const {
-  return *(UTF8Helper::CodePointSearch(text(), UCodePointMathematicalBoldSmallI)) != 0;
-}
-
-void Equation::tidyStandardForm() {
-  // Free the pool of the m_standardForm
-  m_standardForm = Expression();
+bool Equation::containsIComplex(Context * context) const {
+  return expressionClone().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
 }
 
 }
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index de5688753..222bb19b3 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -1,22 +1,23 @@
 #ifndef SOLVER_EQUATION_h
 #define SOLVER_EQUATION_h
 
-#include "../shared/expression_model.h"
+#include "../shared/expression_model_handle.h"
 
 namespace Solver {
 
-class Equation : public Shared::ExpressionModel {
+class Equation : public Shared::ExpressionModelHandle {
 public:
-  Equation();
-  void setContent(const char * c) override;
-  void tidy() override;
+  Equation(Ion::Storage::Record record = Record());
+  void tidyExpressionModel() override;
   bool shouldBeClearedBeforeRemove() override {
     return false;
   }
   Poincare::Expression standardForm(Poincare::Context * context) const;
-  bool containsIComplex() const;
+  bool containsIComplex(Poincare::Context * context) const;
+
+  static constexpr char extension[] = "eq"; // TODO: store this elsewhere?
 private:
-  void tidyStandardForm();
+  size_t metaDataSize() const override { return 0; }
   mutable Poincare::Expression m_standardForm;
 };
 

From b4c8c5398237af11722d14b761453c87a6d4f991 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 10:05:22 +0100
Subject: [PATCH 102/295] [solver] Make EquationStore inherits from
 StorageExpressionModelStore

---
 .../storage_cartesian_function_store.cpp      |  4 +-
 .../shared/storage_expression_model_store.cpp |  6 +-
 apps/shared/storage_expression_model_store.h  |  5 +-
 apps/solver/equation_store.cpp                | 67 ++++++++++++-------
 apps/solver/equation_store.h                  | 36 +++++-----
 5 files changed, 71 insertions(+), 47 deletions(-)

diff --git a/apps/graph/storage_cartesian_function_store.cpp b/apps/graph/storage_cartesian_function_store.cpp
index ecf878b1a..4b145b352 100644
--- a/apps/graph/storage_cartesian_function_store.cpp
+++ b/apps/graph/storage_cartesian_function_store.cpp
@@ -16,12 +16,12 @@ Ion::Storage::Record::ErrorStatus StorageCartesianFunctionStore::addEmptyModel()
 }
 
 void StorageCartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
-  assert(cacheIndex >= 0 && cacheIndex < k_maxNumberOfMemoizedModels);
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   m_functions[cacheIndex] = StorageCartesianFunction(record);
 }
 
 ExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
-  assert(cacheIndex >= 0 && cacheIndex < k_maxNumberOfMemoizedModels);
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_functions[cacheIndex];
 }
 
diff --git a/apps/shared/storage_expression_model_store.cpp b/apps/shared/storage_expression_model_store.cpp
index 82ac68e7c..2a385730c 100644
--- a/apps/shared/storage_expression_model_store.cpp
+++ b/apps/shared/storage_expression_model_store.cpp
@@ -16,14 +16,14 @@ Ion::Storage::Record StorageExpressionModelStore::recordAtIndex(int i) const {
 }
 
 ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
-  for (int i = 0; i < k_maxNumberOfMemoizedModels; i++) {
+  for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (!memoizedModelAtIndex(i)->isNull() && *memoizedModelAtIndex(i) == record) {
       return memoizedModelAtIndex(i);
     }
   }
   setMemoizedModelAtIndex(m_oldestMemoizedIndex, record);
   ExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
-  m_oldestMemoizedIndex = (m_oldestMemoizedIndex+1) % k_maxNumberOfMemoizedModels;
+  m_oldestMemoizedIndex = (m_oldestMemoizedIndex+1) % maxNumberOfMemoizedModels();
   return result;
 }
 
@@ -77,7 +77,7 @@ Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(in
 
 void StorageExpressionModelStore::resetMemoizedModelsExceptRecord(const Ion::Storage::Record record) const {
   Ion::Storage::Record emptyRecord;
-  for (int i = 0; i < k_maxNumberOfMemoizedModels; i++) {
+  for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (*memoizedModelAtIndex(i) != record) {
       setMemoizedModelAtIndex(i, emptyRecord);
     }
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/storage_expression_model_store.h
index 0b19c057b..d681c0749 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/storage_expression_model_store.h
@@ -16,6 +16,8 @@ public:
   StorageExpressionModelStore();
 
   // Getters
+  // By default, the number of models is not bounded
+  virtual int maxNumberOfModels() const { return -1; }
   int numberOfModels() const;
   int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined(); }); }
   Ion::Storage::Record recordAtIndex(int i) const;
@@ -28,10 +30,11 @@ public:
   void removeModel(Ion::Storage::Record record);
 
   // Other
-  void tidy();
+  virtual void tidy();
   void storageDidChangeForRecord(const Ion::Storage::Record record) const { resetMemoizedModelsExceptRecord(record); }
 protected:
   constexpr static int k_maxNumberOfMemoizedModels = 10;
+  int maxNumberOfMemoizedModels() const { return maxNumberOfModels() < 0 ? k_maxNumberOfMemoizedModels : maxNumberOfModels(); }
   typedef bool (*ModelTest)(ExpressionModelHandle * model);
   int numberOfModelsSatisfyingTest(ModelTest test) const;
   Ion::Storage::Record recordStatifyingTestAtIndex(int i, ModelTest test) const;
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index aabf245a2..116fbce32 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -1,4 +1,5 @@
 #include "equation_store.h"
+#include "../constant.h"
 #include "../shared/poincare_helpers.h"
 #include <limits.h>
 
@@ -21,6 +22,7 @@ using namespace Shared;
 namespace Solver {
 
 EquationStore::EquationStore() :
+  StorageExpressionModelStore(),
   m_type(Type::LinearSystem),
   m_numberOfSolutions(0),
   m_exactSolutionExactLayouts{},
@@ -28,17 +30,32 @@ EquationStore::EquationStore() :
 {
 }
 
-Equation * EquationStore::emptyModel() {
-  static Equation e;
-  return &e;
+Ion::Storage::Record::ErrorStatus EquationStore::addEmptyModel() {
+  char name[3] = {'e', '?', 0}; // name is going to be e0 or e1 or ... e5
+  int currentNumber = 0;
+  while (currentNumber < k_maxNumberOfEquations) {
+    name[1] = '0'+currentNumber;
+    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Equation::extension).isNull()) {
+      break;
+    }
+    currentNumber++;
+  }
+  assert(currentNumber < k_maxNumberOfEquations);
+  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, Equation::extension, nullptr, 0);
 }
 
-void EquationStore::setModelAtIndex(Shared::ExpressionModel * e, int i) {
-  m_equations[i] = *(static_cast<Equation *>(e));;
+void EquationStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
+  m_equations[cacheIndex] = Equation(record);
+}
+
+ExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) const {
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
+  return &m_equations[cacheIndex];
 }
 
 void EquationStore::tidy() {
-  ExpressionModelStore::tidy();
+  StorageExpressionModelStore::tidy();
   tidySolution();
 }
 
@@ -78,7 +95,7 @@ bool EquationStore::haveMoreApproximationSolutions(Context * context) {
     return false;
   }
   double step = (m_intervalApproximateSolutions[1]-m_intervalApproximateSolutions[0])*k_precision;
-  return !std::isnan(PoincareHelpers::NextRoot(definedModelAtIndex(0)->standardForm(context), m_variables[0], m_approximateSolutions[m_numberOfSolutions-1], step, m_intervalApproximateSolutions[1], *context));
+  return !std::isnan(PoincareHelpers::NextRoot(modelForRecord(definedRecordAtIndex(0))->standardForm(context), m_variables[0], m_approximateSolutions[m_numberOfSolutions-1], step, m_intervalApproximateSolutions[1], *context));
 }
 
 void EquationStore::approximateSolve(Poincare::Context * context) {
@@ -88,7 +105,7 @@ void EquationStore::approximateSolve(Poincare::Context * context) {
   double start = m_intervalApproximateSolutions[0];
   double step = (m_intervalApproximateSolutions[1]-m_intervalApproximateSolutions[0])*k_precision;
   for (int i = 0; i < k_maxNumberOfApproximateSolutions; i++) {
-    m_approximateSolutions[i] = PoincareHelpers::NextRoot(definedModelAtIndex(0)->standardForm(context), m_variables[0], start, step, m_intervalApproximateSolutions[1], *context);
+    m_approximateSolutions[i] = PoincareHelpers::NextRoot(modelForRecord(definedRecordAtIndex(0))->standardForm(context), m_variables[0], start, step, m_intervalApproximateSolutions[1], *context);
     if (std::isnan(m_approximateSolutions[i])) {
       break;
     } else {
@@ -105,7 +122,7 @@ EquationStore::Error EquationStore::exactSolve(Poincare::Context * context) {
   m_variables[0][0] = 0;
   int numberOfVariables = 0;
   for (int i = 0; i < numberOfDefinedModels(); i++) {
-    const Expression e = definedModelAtIndex(i)->standardForm(context);
+    const Expression e = modelForRecord(definedRecordAtIndex(i))->standardForm(context);
     if (e.isUninitialized() || e.type() == ExpressionNode::Type::Undefined) {
       return Error::EquationUndefined;
     }
@@ -130,7 +147,7 @@ EquationStore::Error EquationStore::exactSolve(Poincare::Context * context) {
   bool isLinear = true; // Invalid the linear system if one equation is non-linear
   Preferences * preferences = Preferences::sharedPreferences();
   for (int i = 0; i < numberOfDefinedModels(); i++) {
-    isLinear = isLinear && definedModelAtIndex(i)->standardForm(context).getLinearCoefficients((char *)m_variables, Poincare::SymbolAbstract::k_maxNameSize, coefficients[i], &constants[i], *context,  updatedComplexFormat(), preferences->angleUnit());
+    isLinear = isLinear && modelForRecord(definedRecordAtIndex(i))->standardForm(context).getLinearCoefficients((char *)m_variables, Poincare::SymbolAbstract::k_maxNameSize, coefficients[i], &constants[i], *context,  updatedComplexFormat(context), preferences->angleUnit());
     if (!isLinear) {
     // TODO: should we clean pool allocated memory if the system is not linear
 #if 0
@@ -161,7 +178,7 @@ EquationStore::Error EquationStore::exactSolve(Poincare::Context * context) {
     // Step 2. Polynomial & Monovariable?
     assert(numberOfVariables == 1 && numberOfDefinedModels() == 1);
     Expression polynomialCoefficients[Expression::k_maxNumberOfPolynomialCoefficients];
-    int degree = definedModelAtIndex(0)->standardForm(context).getPolynomialReducedCoefficients(m_variables[0], polynomialCoefficients, *context, updatedComplexFormat(), preferences->angleUnit());
+    int degree = modelForRecord(definedRecordAtIndex(0))->standardForm(context).getPolynomialReducedCoefficients(m_variables[0], polynomialCoefficients, *context, updatedComplexFormat(context), preferences->angleUnit());
     if (degree == 2) {
       // Polynomial degree <= 2
       m_type = Type::PolynomialMonovariable;
@@ -189,14 +206,14 @@ EquationStore::Error EquationStore::exactSolve(Poincare::Context * context) {
       m_exactSolutionExactLayouts[solutionIndex] = PoincareHelpers::CreateLayout(exactSolutions[i]);
       m_exactSolutionApproximateLayouts[solutionIndex] = PoincareHelpers::CreateLayout(exactSolutionsApproximations[i]);
       // Check for identity between exact and approximate layouts
-      char exactBuffer[Shared::ExpressionModel::k_expressionBufferSize];
-      char approximateBuffer[Shared::ExpressionModel::k_expressionBufferSize];
-      m_exactSolutionExactLayouts[solutionIndex].serializeForParsing(exactBuffer, Shared::ExpressionModel::k_expressionBufferSize);
-      m_exactSolutionApproximateLayouts[solutionIndex].serializeForParsing(approximateBuffer, Shared::ExpressionModel::k_expressionBufferSize);
+      char exactBuffer[::Constant::MaxSerializedExpressionSize];
+      char approximateBuffer[::Constant::MaxSerializedExpressionSize];
+      m_exactSolutionExactLayouts[solutionIndex].serializeForParsing(exactBuffer, ::Constant::MaxSerializedExpressionSize);
+      m_exactSolutionApproximateLayouts[solutionIndex].serializeForParsing(approximateBuffer, ::Constant::MaxSerializedExpressionSize);
       m_exactSolutionIdentity[solutionIndex] = strcmp(exactBuffer, approximateBuffer) == 0;
       if (!m_exactSolutionIdentity[solutionIndex]) {
-        char buffer[Shared::ExpressionModel::k_expressionBufferSize];
-        m_exactSolutionEquality[solutionIndex] = exactSolutions[i].isEqualToItsApproximationLayout(exactSolutionsApproximations[i], buffer, Shared::ExpressionModel::k_expressionBufferSize, preferences->complexFormat(), preferences->angleUnit(), preferences->displayMode(), preferences->numberOfSignificantDigits(), *context);
+        char buffer[::Constant::MaxSerializedExpressionSize];
+        m_exactSolutionEquality[solutionIndex] = exactSolutions[i].isEqualToItsApproximationLayout(exactSolutionsApproximations[i], buffer, ::Constant::MaxSerializedExpressionSize, preferences->complexFormat(), preferences->angleUnit(), preferences->displayMode(), preferences->numberOfSignificantDigits(), *context);
       }
       solutionIndex++;
     }
@@ -221,7 +238,7 @@ EquationStore::Error EquationStore::resolveLinearSystem(Expression exactSolution
   Ab.setDimensions(m, n+1);
 
   // Compute the rank of (A | b)
-  int rankAb = Ab.rank(*context, updatedComplexFormat(), angleUnit, true);
+  int rankAb = Ab.rank(*context, updatedComplexFormat(context), angleUnit, true);
 
   // Initialize the number of solutions
   m_numberOfSolutions = INT_MAX;
@@ -246,7 +263,7 @@ EquationStore::Error EquationStore::resolveLinearSystem(Expression exactSolution
       m_numberOfSolutions = n;
       for (int i = 0; i < m_numberOfSolutions; i++) {
         exactSolutions[i] = Ab.matrixChild(i,n);
-        exactSolutions[i].simplifyAndApproximate(&exactSolutions[i], &exactSolutionsApproximations[i], *context, updatedComplexFormat(), Poincare::Preferences::sharedPreferences()->angleUnit());
+        exactSolutions[i].simplifyAndApproximate(&exactSolutions[i], &exactSolutionsApproximations[i], *context, updatedComplexFormat(context), Poincare::Preferences::sharedPreferences()->angleUnit());
       }
     }
   }
@@ -258,7 +275,7 @@ EquationStore::Error EquationStore::oneDimensialPolynomialSolve(Expression exact
   assert(degree == 2);
   // Compute delta = b*b-4ac
   Expression delta = Subtraction::Builder(Power::Builder(coefficients[1].clone(), Rational::Builder(2)), Multiplication::Builder(Rational::Builder(4), coefficients[0].clone(), coefficients[2].clone()));
-  delta = delta.simplify(*context, updatedComplexFormat(), Poincare::Preferences::sharedPreferences()->angleUnit());
+  delta = delta.simplify(*context, updatedComplexFormat(context), Poincare::Preferences::sharedPreferences()->angleUnit());
   if (delta.isUninitialized()) {
     delta = Poincare::Undefined::Builder();
   }
@@ -275,7 +292,7 @@ EquationStore::Error EquationStore::oneDimensialPolynomialSolve(Expression exact
   }
   exactSolutions[m_numberOfSolutions-1] = delta;
   for (int i = 0; i < m_numberOfSolutions; i++) {
-    exactSolutions[i].simplifyAndApproximate(&exactSolutions[i], &exactSolutionsApproximations[i], *context, updatedComplexFormat(), Poincare::Preferences::sharedPreferences()->angleUnit());
+    exactSolutions[i].simplifyAndApproximate(&exactSolutions[i], &exactSolutionsApproximations[i], *context, updatedComplexFormat(context), Poincare::Preferences::sharedPreferences()->angleUnit());
   }
   return Error::NoError;
 #if 0
@@ -351,17 +368,17 @@ void EquationStore::tidySolution() {
   }
 }
 
-Preferences::ComplexFormat EquationStore::updatedComplexFormat() {
+Preferences::ComplexFormat EquationStore::updatedComplexFormat(Context * context) {
   Preferences::ComplexFormat complexFormat = Preferences::sharedPreferences()->complexFormat();
-  if (complexFormat == Preferences::ComplexFormat::Real && isExplictlyComplex()) {
+  if (complexFormat == Preferences::ComplexFormat::Real && isExplictlyComplex(context)) {
     return Preferences::ComplexFormat::Cartesian;
   }
   return complexFormat;
 }
 
-bool EquationStore::isExplictlyComplex() {
+bool EquationStore::isExplictlyComplex(Context * context) {
   for (int i = 0; i < numberOfDefinedModels(); i++) {
-    if (definedModelAtIndex(i)->containsIComplex()) {
+    if (modelForRecord(definedRecordAtIndex(i))->containsIComplex(context)) {
       return true;
     }
   }
diff --git a/apps/solver/equation_store.h b/apps/solver/equation_store.h
index 510c6dbdf..175d20177 100644
--- a/apps/solver/equation_store.h
+++ b/apps/solver/equation_store.h
@@ -2,13 +2,13 @@
 #define SOLVER_EQUATION_STORE_H
 
 #include "equation.h"
-#include "../shared/expression_model_store.h"
+#include "../shared/storage_expression_model_store.h"
 #include <poincare/symbol_abstract.h>
 #include <stdint.h>
 
 namespace Solver {
 
-class EquationStore : public Shared::ExpressionModelStore {
+class EquationStore : public Shared::StorageExpressionModelStore {
 public:
   enum class Type {
     LinearSystem,
@@ -23,14 +23,14 @@ public:
     NonLinearSystem = -4,
     RequireApproximateSolution = -5,
   };
-  /* EquationStore */
   EquationStore();
-  Equation * modelAtIndex(int i) override {
-    assert(i>=0 && i<m_numberOfModels);
-    return &m_equations[i];
-  }
-  Equation * definedModelAtIndex(int i) override { return static_cast<Equation *>(Shared::ExpressionModelStore::definedModelAtIndex(i)); }
+
+  /* StorageExpressionModelStore */
   int maxNumberOfModels() const override { return k_maxNumberOfEquations; }
+  Shared::ExpiringPointer<Equation> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Equation>(static_cast<Equation *>(privateModelForRecord(record))); }
+  Ion::Storage::Record::ErrorStatus addEmptyModel() override;
+
+  /* EquationStore */
   Type type() const {
     return m_type;
   }
@@ -69,24 +69,28 @@ public:
   bool haveMoreApproximationSolutions(Poincare::Context * context);
 
   void tidy() override;
+
   static constexpr int k_maxNumberOfExactSolutions = Poincare::Expression::k_maxNumberOfVariables > Poincare::Expression::k_maxPolynomialDegree + 1? Poincare::Expression::k_maxNumberOfVariables : Poincare::Expression::k_maxPolynomialDegree + 1;
   static constexpr int k_maxNumberOfApproximateSolutions = 10;
   static constexpr int k_maxNumberOfSolutions = k_maxNumberOfExactSolutions > k_maxNumberOfApproximateSolutions ? k_maxNumberOfExactSolutions : k_maxNumberOfApproximateSolutions;
 private:
   static constexpr double k_precision = 0.01;
   static constexpr int k_maxNumberOfEquations = Poincare::Expression::k_maxNumberOfVariables; // Enable the same number of equations as the number of unknown variables
-  Equation * emptyModel() override;
-  Equation * nullModel() override {
-    return emptyModel();
-  }
-  void setModelAtIndex(Shared::ExpressionModel * f, int i) override;
+
+  // StorageExpressionModelStore
+  const char * modelExtension() const override { return Equation::extension; }
+  /* We don't really use model memoization as the number of Equation is limited
+   * and we keep enough Equations to store them all. */
+  void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
+  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+
   Error resolveLinearSystem(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression coefficients[k_maxNumberOfEquations][Poincare::Expression::k_maxNumberOfVariables], Poincare::Expression constants[k_maxNumberOfEquations], Poincare::Context * context);
   Error oneDimensialPolynomialSolve(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression polynomialCoefficients[Poincare::Expression::k_maxNumberOfPolynomialCoefficients], int degree, Poincare::Context * context);
   void tidySolution();
-  bool isExplictlyComplex();
-  Poincare::Preferences::ComplexFormat updatedComplexFormat();
+  bool isExplictlyComplex(Poincare::Context * context);
+  Poincare::Preferences::ComplexFormat updatedComplexFormat(Poincare::Context * context);
 
-  Equation m_equations[k_maxNumberOfEquations];
+  mutable Equation m_equations[k_maxNumberOfEquations];
   Type m_type;
   char m_variables[Poincare::Expression::k_maxNumberOfVariables][Poincare::SymbolAbstract::k_maxNameSize];
   int m_numberOfSolutions;

From 178a064c299c7f35f71b4b5ca41c0028a1eed94a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 14:10:59 +0100
Subject: [PATCH 103/295] [apps/shared] ExpressionModelHandle: specify the
 symbol that is turned into Unknown X in Derived classes

---
 apps/graph/graph/calculation_graph_controller.cpp           | 2 +-
 apps/graph/graph/graph_controller_helper.cpp                | 2 +-
 apps/graph/graph/integral_graph_controller.cpp              | 2 +-
 apps/graph/graph/intersection_graph_controller.cpp          | 6 +++---
 apps/graph/graph/tangent_graph_controller.cpp               | 2 +-
 apps/graph/storage_cartesian_function_store.h               | 3 +--
 .../values/storage_derivative_parameter_controller.cpp      | 2 +-
 apps/graph/values/storage_function_parameter_controller.cpp | 2 +-
 apps/graph/values/storage_values_controller.cpp             | 4 ++--
 apps/shared/expression_model_handle.cpp                     | 4 ++--
 apps/shared/expression_model_handle.h                       | 1 +
 apps/shared/storage_cartesian_function.h                    | 2 ++
 apps/variable_box_controller.cpp                            | 2 +-
 13 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 1171157df..7bb84d4a8 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -63,7 +63,7 @@ void CalculationGraphController::setRecord(Ion::Storage::Record record) {
 
 void CalculationGraphController::reloadBannerView() {
   m_bannerView->setNumberOfSubviews(2);
-  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunctionStore::Symbol());
+  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunction::Symbol());
 }
 
 bool CalculationGraphController::moveCursor(int direction) {
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index 41ca6250c..41135c4aa 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -23,7 +23,7 @@ void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shar
   constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
-  int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize, StorageCartesianFunctionStore::Symbol());
+  int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize, StorageCartesianFunction::Symbol());
   const char * legend = "=";
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   double y = function->approximateDerivative(cursor->x(), app->localContext());
diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index f07eac2dd..c8e948f72 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -40,7 +40,7 @@ Layout IntegralGraphController::createFunctionLayout(ExpiringPointer<StorageFunc
   constexpr size_t bufferSize = SymbolAbstract::k_maxNameSize+5; // f(x)dx
   char buffer[bufferSize];
   const char * dx = "dx";
-  int numberOfChars = function->nameWithArgument(buffer, bufferSize-strlen(dx), StorageCartesianFunctionStore::Symbol());
+  int numberOfChars = function->nameWithArgument(buffer, bufferSize-strlen(dx), StorageCartesianFunction::Symbol());
   strlcpy(buffer+numberOfChars, dx, bufferSize-numberOfChars);
   return LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
 }
diff --git a/apps/graph/graph/intersection_graph_controller.cpp b/apps/graph/graph/intersection_graph_controller.cpp
index fb0a81e23..93bc35422 100644
--- a/apps/graph/graph/intersection_graph_controller.cpp
+++ b/apps/graph/graph/intersection_graph_controller.cpp
@@ -18,18 +18,18 @@ const char * IntersectionGraphController::title() {
 
 void IntersectionGraphController::reloadBannerView() {
   m_bannerView->setNumberOfSubviews(2);
-  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunctionStore::Symbol());
+  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunction::Symbol());
   constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
   const char * legend = "=";
   // 'f(x)=g(x)=', keep 2 chars for '='
   ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(m_record);
-  int numberOfChar = f->nameWithArgument(buffer, bufferSize-2, StorageCartesianFunctionStore::Symbol());
+  int numberOfChar = f->nameWithArgument(buffer, bufferSize-2, StorageCartesianFunction::Symbol());
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   // keep 1 char for '=';
   ExpiringPointer<StorageCartesianFunction> g = functionStore()->modelForRecord(m_intersectedRecord);
-  numberOfChar += g->nameWithArgument(buffer+numberOfChar, bufferSize-numberOfChar-1, StorageCartesianFunctionStore::Symbol());
+  numberOfChar += g->nameWithArgument(buffer+numberOfChar, bufferSize-numberOfChar-1, StorageCartesianFunction::Symbol());
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(m_cursor->y(), buffer+numberOfChar, bufferSize-numberOfChar, Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index b3ab42e99..c66985d4a 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -40,7 +40,7 @@ void TangentGraphController::reloadBannerView() {
     return;
   }
   App * myApp = static_cast<App *>(app());
-  StorageFunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_record, myApp->functionStore(), StorageCartesianFunctionStore::Symbol());
+  StorageFunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_record, myApp->functionStore(), StorageCartesianFunction::Symbol());
   GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(m_cursor, m_record, myApp);
   constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index 06a69b1ea..865faad0e 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -11,8 +11,7 @@ namespace Graph {
 class StorageCartesianFunctionStore : public Shared::StorageFunctionStore {
 public:
   Shared::ExpiringPointer<Shared::StorageCartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::StorageCartesianFunction>(static_cast<Shared::StorageCartesianFunction *>(privateModelForRecord(record))); }
-  static char Symbol() { return 'x'; }
-  char symbol() const override { return Symbol(); }
+  char symbol() const override { return Shared::StorageCartesianFunction::Symbol(); }
 private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Shared::GlobalContext::funcExtension; }
diff --git a/apps/graph/values/storage_derivative_parameter_controller.cpp b/apps/graph/values/storage_derivative_parameter_controller.cpp
index a3fcf9ddd..51be4d2fc 100644
--- a/apps/graph/values/storage_derivative_parameter_controller.cpp
+++ b/apps/graph/values/storage_derivative_parameter_controller.cpp
@@ -18,7 +18,7 @@ StorageDerivativeParameterController::StorageDerivativeParameterController(Stora
 }
 
 void StorageDerivativeParameterController::viewWillAppear() {
-  functionStore()->modelForRecord(m_record)->derivativeNameWithArgument(m_pageTitle, k_maxNumberOfCharsInTitle, StorageCartesianFunctionStore::Symbol());
+  functionStore()->modelForRecord(m_record)->derivativeNameWithArgument(m_pageTitle, k_maxNumberOfCharsInTitle, Shared::StorageCartesianFunction::Symbol());
 }
 
 const char * StorageDerivativeParameterController::title() {
diff --git a/apps/graph/values/storage_function_parameter_controller.cpp b/apps/graph/values/storage_function_parameter_controller.cpp
index 737cafada..915344785 100644
--- a/apps/graph/values/storage_function_parameter_controller.cpp
+++ b/apps/graph/values/storage_function_parameter_controller.cpp
@@ -8,7 +8,7 @@ using namespace Shared;
 namespace Graph {
 
 StorageFunctionParameterController::StorageFunctionParameterController(StorageValuesController * valuesController) :
-  StorageValuesFunctionParameterController(StorageCartesianFunctionStore::Symbol()),
+  StorageValuesFunctionParameterController(StorageCartesianFunction::Symbol()),
   m_displayDerivativeColumn(I18n::Message::DerivativeFunctionColumn),
   m_valuesController(valuesController)
 {
diff --git a/apps/graph/values/storage_values_controller.cpp b/apps/graph/values/storage_values_controller.cpp
index 58ffdf9e1..764c990e8 100644
--- a/apps/graph/values/storage_values_controller.cpp
+++ b/apps/graph/values/storage_values_controller.cpp
@@ -48,9 +48,9 @@ void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, in
      * after the isDerivativeColumn call, else it will expire. */
     Shared::ExpiringPointer<StorageCartesianFunction> function = functionStore()->modelForRecord(recordAtColumn(i));
     if (isDerivative) {
-      function->derivativeNameWithArgument(bufferName, bufferNameSize, StorageCartesianFunctionStore::Symbol());
+      function->derivativeNameWithArgument(bufferName, bufferNameSize, StorageCartesianFunction::Symbol());
     } else {
-      function->nameWithArgument(bufferName, bufferNameSize, StorageCartesianFunctionStore::Symbol());
+      function->nameWithArgument(bufferName, bufferNameSize, StorageCartesianFunction::Symbol());
     }
     myFunctionCell->setText(bufferName);
     myFunctionCell->setColor(function->color());
diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index 2faf4339e..cf8f424e3 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -90,8 +90,8 @@ Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(const char *
   if (c && *c != 0) {
     // Compute the expression to store, without replacing symbols
     expressionToStore = Expression::Parse(c);
-    if (!expressionToStore.isUninitialized()) {
-      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder('x')); //TODO Beware of non x unknowns! (for instance whe sequences are in the storage)
+    if (!expressionToStore.isUninitialized() && symbol() != 0) {
+      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol()));
     }
   }
   return setExpressionContent(expressionToStore);
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index 4a90f529d..b034e6ec9 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -14,6 +14,7 @@ class ExpressionModelHandle : public Ion::Storage::Record {
   // TODO find better name (once we remove ExpressionModel?)
 public:
   ExpressionModelHandle(Ion::Storage::Record record);
+  virtual char symbol() const { return 0; };
   void text(char * buffer, size_t bufferSize) const;
   Poincare::Expression expressionReduced(Poincare::Context * context) const;
   Poincare::Expression expressionClone() const;
diff --git a/apps/shared/storage_cartesian_function.h b/apps/shared/storage_cartesian_function.h
index 9cd559934..722a07d99 100644
--- a/apps/shared/storage_cartesian_function.h
+++ b/apps/shared/storage_cartesian_function.h
@@ -10,6 +10,8 @@ namespace Shared {
 class StorageCartesianFunction : public StorageFunction {
 public:
   static void DefaultName(char buffer[], size_t bufferSize);
+  static char Symbol() { return 'x'; }
+  char symbol() const override { return Symbol(); };
   static StorageCartesianFunction NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName = nullptr);
   StorageCartesianFunction(Ion::Storage::Record record = Record()) :
     StorageFunction(record)
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 24caf7a13..e27c06a23 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -114,7 +114,7 @@ void VariableBoxController::willDisplayCellForIndex(HighlightCell * cell, int in
     symbolLength = f.nameWithArgument(
         symbolName,
         Shared::StorageFunction::k_maxNameWithArgumentSize,
-        Graph::StorageCartesianFunctionStore::Symbol());
+        Shared::StorageCartesianFunction::Symbol());
   }
   Layout symbolLayout = LayoutHelper::String(symbolName, symbolLength);
   myCell->setLayout(symbolLayout);

From a950cb999865fd58e7cd2c51d95301a15c590ee6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 15:32:16 +0100
Subject: [PATCH 104/295] [apps/shared] StorageExpressionModelListController:
 switching from no-selected-cell to first-cell-selected should not make the
 memoization shift

---
 apps/shared/storage_expression_model_list_controller.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index bd6aab110..48a4bfa8d 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -22,7 +22,7 @@ void StorageExpressionModelListController::tableSelectionDidChange(int previousS
   resetMemoizationForIndex(currentSelectedMemoizedIndex);
 
   // Update m_cumulatedHeightForSelectedIndex if we scrolled one cell up/down
-  if (currentSelectedRow == previousSelectedRow + 1) {
+  if (previousSelectedRow >= 0 && currentSelectedRow == previousSelectedRow + 1) {
     /* We selected the cell under the previous cell. Shift the memoized cell
      * heights. */
     shiftMemoization(true);
@@ -34,7 +34,7 @@ void StorageExpressionModelListController::tableSelectionDidChange(int previousS
       assert(currentSelectedRow == 0);
       m_cumulatedHeightForSelectedIndex = 0;
     }
-  } else if (currentSelectedRow == previousSelectedRow - 1) {
+  } else if (currentSelectedRow >= 0 && currentSelectedRow == previousSelectedRow - 1) {
     /* We selected the cell above the previous cell. Shift the memoized cell
      * heights. */
     shiftMemoization(false);
@@ -45,7 +45,7 @@ void StorageExpressionModelListController::tableSelectionDidChange(int previousS
     } else {
       m_cumulatedHeightForSelectedIndex = 0;
     }
-  } else if (previousSelectedRow != currentSelectedRow) {
+  } else if (previousSelectedCellY != currentSelectedRow || previousSelectedCellY < 0) {
     resetMemoization();
   }
 }

From fdad9334c30d34e56ffe2a7bbc0c1c6039a45dec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 15:35:50 +0100
Subject: [PATCH 105/295] [apps/shared] StorageExpressionModelListController:
 change name reinitExpression--> reinitSelectedExpression

---
 apps/shared/storage_expression_model_list_controller.cpp | 4 ++--
 apps/shared/storage_expression_model_list_controller.h   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 48a4bfa8d..697197054 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -142,7 +142,7 @@ bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
     ExpiringPointer<ExpressionModelHandle> model =  modelStore()->modelForRecord(record);
     if (model->shouldBeClearedBeforeRemove()) {
-      reinitExpression(model);
+      reinitSelectedExpression(model);
     } else {
       if (removeModelRow(record)) {
         int newSelectedRow = selectedRow() >= numberOfExpressionRows() ? numberOfExpressionRows()-1 : selectedRow();
@@ -170,7 +170,7 @@ void StorageExpressionModelListController::addEmptyModel() {
   editExpression(Ion::Events::OK);
 }
 
-void StorageExpressionModelListController::reinitExpression(ExpiringPointer<ExpressionModelHandle> model) {
+void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
   model->setContent("");
   resetMemoization();
   selectableTableView()->reloadData();
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index 3248ac0fd..30413efe6 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -24,7 +24,7 @@ protected:
   bool handleEventOnExpression(Ion::Events::Event event);
   virtual void addEmptyModel();
   virtual void didChangeModelsList() { resetMemoization(); }
-  virtual void reinitExpression(ExpiringPointer<ExpressionModelHandle> model);
+  virtual void reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model);
   virtual void editExpression(Ion::Events::Event event);
   virtual bool editSelectedRecordWithText(const char * text);
   virtual bool removeModelRow(Ion::Storage::Record record);

From be76742bc3e0811a0868790b5afefdd73bf12975 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 15:37:22 +0100
Subject: [PATCH 106/295] [apps/shared] StorageExpressionModelListController:
 avoid useless invalidation of memoization

---
 .../storage_expression_model_list_controller.cpp       | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 697197054..56ea102c4 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -15,12 +15,8 @@ StorageExpressionModelListController::StorageExpressionModelListController(Respo
 }
 
 void StorageExpressionModelListController::tableSelectionDidChange(int previousSelectedRow) {
-  constexpr int currentSelectedMemoizedIndex = k_memoizedCellsCount/2 + 1; // Needs k_memoizedCellsCount to be odd, which is static asserted in the header file
   int currentSelectedRow = selectedRow();
 
-  // The previously selected cell's height might have changed.
-  resetMemoizationForIndex(currentSelectedMemoizedIndex);
-
   // Update m_cumulatedHeightForSelectedIndex if we scrolled one cell up/down
   if (previousSelectedRow >= 0 && currentSelectedRow == previousSelectedRow + 1) {
     /* We selected the cell under the previous cell. Shift the memoized cell
@@ -172,7 +168,8 @@ void StorageExpressionModelListController::addEmptyModel() {
 
 void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
   model->setContent("");
-  resetMemoization();
+  // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
+  resetMemoizationForIndex(k_memoizedCellsCount/2);
   selectableTableView()->reloadData();
 }
 
@@ -198,7 +195,8 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
         StorageExpressionModelListController * myController = static_cast<StorageExpressionModelListController *>(context);
         InputViewController * myInputViewController = (InputViewController *)sender;
         const char * textBody = myInputViewController->textBody();
-        myController->resetMemoization();
+        // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
+        myController->resetMemoizationForIndex(k_memoizedCellsCount/2);
         return myController->editSelectedRecordWithText(textBody);
       },
       [](void * context, void * sender){

From f8e9fdef65618f453c8f6784fa2dbed3500d5e26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 15:38:10 +0100
Subject: [PATCH 107/295] [solver] EquationListView: clean setBraceStyle to
 always re-layout

---
 apps/solver/equation_list_view.cpp | 8 ++++----
 apps/solver/list_controller.cpp    | 1 -
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/apps/solver/equation_list_view.cpp b/apps/solver/equation_list_view.cpp
index 78d2e9e0a..c666a0bb3 100644
--- a/apps/solver/equation_list_view.cpp
+++ b/apps/solver/equation_list_view.cpp
@@ -22,10 +22,10 @@ EquationListView::EquationListView(Responder * parentResponder, TableViewDataSou
 }
 
 void EquationListView::setBraceStyle(BraceStyle style) {
-  if (m_braceStyle != style) {
-    m_braceStyle = style;
-    layoutSubviews();
-  }
+  /* Even if the brace style does not change, we want to relayout in case the
+   * size of the braced object has changed. */
+  m_braceStyle = style;
+  layoutSubviews();
 }
 
 void EquationListView::scrollViewDidChangeOffset(ScrollViewDataSource * scrollViewDataSource) {
diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index 359dc1bc2..e5b8d21ab 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -224,7 +224,6 @@ bool ListController::removeModelRow(ExpressionModel * model) {
 void ListController::reloadBrace() {
   EquationListView::BraceStyle braceStyle = m_equationStore->numberOfModels() <= 1 ? EquationListView::BraceStyle::None : (m_equationStore->numberOfModels() == m_equationStore->maxNumberOfModels() ? EquationListView::BraceStyle::Full : EquationListView::BraceStyle::OneRowShort);
   m_equationListView.setBraceStyle(braceStyle);
-  m_equationListView.layoutSubviews();
 }
 
 SelectableTableView * ListController::selectableTableView() {

From d94838a4c8f257e8d22659cf2e1aa38ef2e2e080 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 16:11:53 +0100
Subject: [PATCH 108/295] [apps/shared] Make
 StorageExpressionModelListController SelectableTableViewDelegate instead of
 StorageFunctionListController

---
 .../storage_expression_model_list_controller.cpp      | 10 +++++-----
 .../shared/storage_expression_model_list_controller.h | 11 ++++++-----
 apps/shared/storage_function_list_controller.cpp      |  2 +-
 apps/shared/storage_function_list_controller.h        |  2 +-
 4 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 56ea102c4..619eaf283 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -14,23 +14,23 @@ StorageExpressionModelListController::StorageExpressionModelListController(Respo
   m_addNewModel.setMessage(text);
 }
 
-void StorageExpressionModelListController::tableSelectionDidChange(int previousSelectedRow) {
+void StorageExpressionModelListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   int currentSelectedRow = selectedRow();
 
   // Update m_cumulatedHeightForSelectedIndex if we scrolled one cell up/down
-  if (previousSelectedRow >= 0 && currentSelectedRow == previousSelectedRow + 1) {
+  if (previousSelectedCellY >= 0 && previousSelectedCellY == previousSelectedCellY + 1) {
     /* We selected the cell under the previous cell. Shift the memoized cell
      * heights. */
     shiftMemoization(true);
     resetMemoizationForIndex(k_memoizedCellsCount-1);
     // Update m_cumulatedHeightForSelectedIndex
-    if (previousSelectedRow >= 0) {
-      m_cumulatedHeightForSelectedIndex+= memoizedRowHeight(previousSelectedRow);
+    if (previousSelectedCellY >= 0) {
+      m_cumulatedHeightForSelectedIndex+= memoizedRowHeight(previousSelectedCellY);
     } else {
       assert(currentSelectedRow == 0);
       m_cumulatedHeightForSelectedIndex = 0;
     }
-  } else if (currentSelectedRow >= 0 && currentSelectedRow == previousSelectedRow - 1) {
+  } else if (currentSelectedRow >= 0 && currentSelectedRow == previousSelectedCellY - 1) {
     /* We selected the cell above the previous cell. Shift the memoized cell
      * heights. */
     shiftMemoization(false);
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index 30413efe6..ac1d6d06c 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -7,17 +7,18 @@
 
 namespace Shared {
 
-class StorageExpressionModelListController : public ViewController, public SelectableTableViewDataSource {
+class StorageExpressionModelListController : public ViewController, public SelectableTableViewDataSource, public SelectableTableViewDelegate {
 public:
   StorageExpressionModelListController(Responder * parentResponder, I18n::Message text);
 protected:
   static constexpr KDCoordinate k_expressionMargin = 5;
-  // Memoization of cell heights
-  void tableSelectionDidChange(int previousSelectedRow);
-  KDCoordinate memoizedRowHeight(int j);
-  KDCoordinate memoizedCumulatedHeightFromIndex(int j);
+  // SelectableTableViewDelegate
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
   // TableViewDataSource
   virtual int numberOfExpressionRows();
+  KDCoordinate memoizedRowHeight(int j);
+  KDCoordinate memoizedCumulatedHeightFromIndex(int j);
+  int memoizedIndexFromCumulatedHeight(KDCoordinate offsetY);
   virtual KDCoordinate expressionRowHeight(int j);
   virtual void willDisplayExpressionCellAtIndex(HighlightCell * cell, int j);
   // Responder
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index 035e1215d..1e2bf357d 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -260,7 +260,7 @@ void StorageFunctionListController::willExitResponderChain(Responder * nextFirst
 
 void StorageFunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   // Update memoization of cell heights
-  StorageExpressionModelListController::tableSelectionDidChange(previousSelectedCellY);
+  StorageExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY);
   // Do not select the cell left of the "addEmptyFunction" cell
   if (isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
     t->selectCellAtLocation(1, numberOfRows()-1);
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/storage_function_list_controller.h
index dfc7bcfe7..e56ea212d 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/storage_function_list_controller.h
@@ -11,7 +11,7 @@
 
 namespace Shared {
 
-class StorageFunctionListController : public StorageExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource, public SelectableTableViewDelegate {
+class StorageFunctionListController : public StorageExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource {
 public:
   StorageFunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text);
 

From 2e6e7f93f7fd5d959a16f1778a511ca6364acb52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 22 Feb 2019 16:25:29 +0100
Subject: [PATCH 109/295] [solver] Make Solver::ListController inherits from
 StorageExpressionModelListController instead of ExpressionModelListController

---
 ...orage_expression_model_list_controller.cpp | 48 +++++++++++++++++--
 ...storage_expression_model_list_controller.h |  5 +-
 .../storage_function_list_controller.cpp      | 48 -------------------
 .../shared/storage_function_list_controller.h | 13 +++--
 apps/solver/equation_list_view.cpp            |  9 ++--
 apps/solver/equation_list_view.h              |  4 +-
 .../equation_models_parameter_controller.cpp  | 10 ++--
 apps/solver/list_controller.cpp               |  8 ++--
 apps/solver/list_controller.h                 | 26 +++++-----
 9 files changed, 90 insertions(+), 81 deletions(-)

diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 619eaf283..55ad03508 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -4,6 +4,8 @@
 
 namespace Shared {
 
+static inline int minInt(int x, int y) { return x < y ? x : y; }
+
 /* Table Data Source */
 
 StorageExpressionModelListController::StorageExpressionModelListController(Responder * parentResponder, I18n::Message text) :
@@ -50,7 +52,7 @@ KDCoordinate StorageExpressionModelListController::memoizedRowHeight(int j) {
   if (j < 0) {
     return 0;
   }
-  int currentSelectedRow = selectedRow();
+  int currentSelectedRow = selectedRow() < 0 ? 0 : selectedRow();
   constexpr int halfMemoizationCount = k_memoizedCellsCount/2;
   if (j >= currentSelectedRow - halfMemoizationCount && j <= currentSelectedRow + halfMemoizationCount) {
     int memoizedIndex = j - (currentSelectedRow - halfMemoizationCount);
@@ -66,7 +68,7 @@ KDCoordinate StorageExpressionModelListController::memoizedCumulatedHeightFromIn
   if (j <= 0) {
     return 0;
   }
-  int currentSelectedRow = selectedRow();
+  int currentSelectedRow = selectedRow() < 0 ? 0 : selectedRow();
   constexpr int halfMemoizationCount = k_memoizedCellsCount/2;
   /* If j is not easily computable from the memoized values, compute it the hard
    * way. */
@@ -97,7 +99,45 @@ KDCoordinate StorageExpressionModelListController::memoizedCumulatedHeightFromIn
   return result;
 }
 
+int StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(KDCoordinate offsetY) {
+  if (offsetY == 0) {
+    return 0;
+  }
+  /* We use memoization to speed up this method: if offsetY is "around" the
+   * memoized cumulatedHeightForIndex, we can compute its value easily by
+   * adding/substracting memoized row heights. */
+
+  int currentSelectedRow = selectedRow() < 0 ? 0 : selectedRow();
+  int rowsCount = numberOfExpressionRows();
+  if (rowsCount <= 1 || currentSelectedRow < 1) {
+    return notMemoizedIndexFromCumulatedHeight(offsetY);
+  }
+
+  KDCoordinate currentCumulatedHeight = memoizedCumulatedHeightFromIndex(currentSelectedRow);
+  if (offsetY > currentCumulatedHeight) {
+    int iMax = minInt(k_memoizedCellsCount/2 + 1, rowsCount - currentSelectedRow);
+    for (int i = 0; i < iMax; i++) {
+      currentCumulatedHeight+= memoizedRowHeight(currentSelectedRow + i);
+      if (offsetY <= currentCumulatedHeight) {
+        return currentSelectedRow + i;
+      }
+    }
+  } else {
+    int iMax = minInt(k_memoizedCellsCount/2, currentSelectedRow);
+    for (int i = 1; i <= iMax; i++) {
+      currentCumulatedHeight-= memoizedRowHeight(currentSelectedRow-i);
+      if (offsetY > currentCumulatedHeight) {
+        return currentSelectedRow - i;
+      }
+    }
+  }
+  return notMemoizedIndexFromCumulatedHeight(offsetY);
+}
+
 int StorageExpressionModelListController::numberOfExpressionRows() {
+  if (modelStore()->numberOfModels() == modelStore()->maxNumberOfModels()) {
+    return modelStore()->numberOfModels();
+  }
   return 1 + modelStore()->numberOfModels();
 }
 
@@ -195,8 +235,6 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
         StorageExpressionModelListController * myController = static_cast<StorageExpressionModelListController *>(context);
         InputViewController * myInputViewController = (InputViewController *)sender;
         const char * textBody = myInputViewController->textBody();
-        // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
-        myController->resetMemoizationForIndex(k_memoizedCellsCount/2);
         return myController->editSelectedRecordWithText(textBody);
       },
       [](void * context, void * sender){
@@ -205,6 +243,8 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
 }
 
 bool StorageExpressionModelListController::editSelectedRecordWithText(const char * text) {
+  // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
+  resetMemoizationForIndex(k_memoizedCellsCount/2);
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
   ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
   return (model->setContent(text) == Ion::Storage::Record::ErrorStatus::None);
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index ac1d6d06c..f4976ccbf 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -35,8 +35,6 @@ protected:
   virtual SelectableTableView * selectableTableView() = 0;
   virtual StorageExpressionModelStore * modelStore() = 0;
   virtual InputViewController * inputController() = 0;
-  EvenOddMessageTextCell m_addNewModel;
-protected:
   // Memoization
   static constexpr int k_memoizedCellsCount = 7;
   /* We use memoization to speed up indexFromHeight(offset) in the children
@@ -57,11 +55,14 @@ protected:
    *   || j > selectedRow + halfMemoizationCount) { ... } */
   virtual void resetMemoizationForIndex(int index);
   virtual void shiftMemoization(bool newCellIsUnder);
+  EvenOddMessageTextCell m_addNewModel;
 private:
   // Memoization
   static constexpr int k_resetedMemoizedValue = -1;
   void resetMemoization();
+  // TableViewDataSource
   virtual KDCoordinate notMemoizedCumulatedHeightFromIndex(int j) = 0;
+  virtual int notMemoizedIndexFromCumulatedHeight(KDCoordinate offsetY) = 0;
   KDCoordinate m_memoizedCellHeight[k_memoizedCellsCount];
   KDCoordinate m_cumulatedHeightForSelectedIndex;
 };
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index 1e2bf357d..31ef84600 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -41,14 +41,6 @@ void StorageFunctionListController::viewWillAppear() {
   computeTitlesColumnWidth();
 }
 
-KDCoordinate StorageFunctionListController::rowHeight(int j) {
-  return StorageExpressionModelListController::memoizedRowHeight(j);
-}
-
-KDCoordinate StorageFunctionListController::cumulatedHeightFromIndex(int j) {
-  return StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(j);
-}
-
 KDCoordinate StorageFunctionListController::columnWidth(int i) {
   switch (i) {
     case 0:
@@ -87,42 +79,6 @@ int StorageFunctionListController::indexFromCumulatedWidth(KDCoordinate offsetX)
   }
 }
 
-int StorageFunctionListController::indexFromCumulatedHeight(KDCoordinate offsetY) {
-  if (offsetY == 0) {
-    return 0;
-  }
-
-  /* We use memoization to speed up this method: if offsetY is "around" the
-   * memoized cumulatedHeightForIndex, we can compute its value easily by
-   * adding/substracting memoized row heights. */
-
-  int currentSelectedRow = selectedRow();
-  int rowsCount = numberOfRows();
-  if (rowsCount <= 1 || currentSelectedRow < 1) {
-    return TableViewDataSource::indexFromCumulatedHeight(offsetY);
-  }
-
-  KDCoordinate currentCumulatedHeight = cumulatedHeightFromIndex(currentSelectedRow);
-  if (offsetY > currentCumulatedHeight) {
-    int iMax = minInt(k_memoizedCellsCount/2 + 1, rowsCount - currentSelectedRow);
-    for (int i = 0; i < iMax; i++) {
-      currentCumulatedHeight+= rowHeight(currentSelectedRow + i);
-      if (offsetY <= currentCumulatedHeight) {
-        return currentSelectedRow + i;
-      }
-    }
-  } else {
-    int iMax = minInt(k_memoizedCellsCount/2, currentSelectedRow);
-    for (int i = 1; i <= iMax; i++) {
-      currentCumulatedHeight-= rowHeight(currentSelectedRow-i);
-      if (offsetY > currentCumulatedHeight) {
-        return currentSelectedRow - i;
-      }
-    }
-  }
-  return TableViewDataSource::indexFromCumulatedHeight(offsetY);
-}
-
 int StorageFunctionListController::typeAtLocation(int i, int j) {
   if (isAddEmptyRow(j)){
     return i + 2;
@@ -320,10 +276,6 @@ void StorageFunctionListController::didChangeModelsList() {
   computeTitlesColumnWidth();
 }
 
-KDCoordinate StorageFunctionListController::notMemoizedCumulatedHeightFromIndex(int j) {
-  return TableViewDataSource::cumulatedHeightFromIndex(j);
-}
-
 KDCoordinate StorageFunctionListController::baseline(int j) {
   if (j < 0) {
     return -1;
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/storage_function_list_controller.h
index e56ea212d..6a5e92e80 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/storage_function_list_controller.h
@@ -20,13 +20,13 @@ public:
 
   /* TableViewDataSource */
   int numberOfRows() override { return this->numberOfExpressionRows(); }
+  KDCoordinate rowHeight(int j) override { return StorageExpressionModelListController::memoizedRowHeight(j); }
+  KDCoordinate cumulatedHeightFromIndex(int j) override { return StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
+  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
   int numberOfColumns() override { return 2; }
-  KDCoordinate rowHeight(int j) override;
   KDCoordinate columnWidth(int i) override;
   KDCoordinate cumulatedWidthFromIndex(int i) override;
-  KDCoordinate cumulatedHeightFromIndex(int j) override;
   int indexFromCumulatedWidth(KDCoordinate offsetX) override;
-  int indexFromCumulatedHeight(KDCoordinate offsetY) override;
   int typeAtLocation(int i, int j) override;
   HighlightCell * reusableCell(int index, int type) override;
   int reusableCellCount(int type) override;
@@ -66,7 +66,12 @@ private:
   InputViewController * inputController() override;
   KDCoordinate maxFunctionNameWidth();
   void didChangeModelsList() override;
-  KDCoordinate notMemoizedCumulatedHeightFromIndex(int j) override;
+  KDCoordinate notMemoizedCumulatedHeightFromIndex(int j) override {
+    return TableViewDataSource::cumulatedHeightFromIndex(j);
+  }
+  int notMemoizedIndexFromCumulatedHeight(KDCoordinate offsetY) override {
+    return TableViewDataSource::indexFromCumulatedHeight(offsetY);
+  }
   virtual StorageListParameterController * parameterController() = 0;
   virtual int maxNumberOfDisplayableRows() = 0;
   virtual FunctionTitleCell * titleCells(int index) = 0;
diff --git a/apps/solver/equation_list_view.cpp b/apps/solver/equation_list_view.cpp
index c666a0bb3..a9fb8ab2c 100644
--- a/apps/solver/equation_list_view.cpp
+++ b/apps/solver/equation_list_view.cpp
@@ -1,21 +1,22 @@
 #include "equation_list_view.h"
+#include "list_controller.h"
 
 namespace Solver {
 
 /* EquationListView */
 
-EquationListView::EquationListView(Responder * parentResponder, TableViewDataSource * dataSource, SelectableTableViewDataSource * selectionDataSource) :
-  Responder(parentResponder),
+EquationListView::EquationListView(ListController * listController) :
+  Responder(listController),
   View(),
   m_braceStyle(BraceStyle::None),
-  m_listView(this, dataSource, selectionDataSource),
+  m_listView(this, listController, listController, listController),
   m_braceView(),
   m_scrollBraceView(&m_braceView, this)
 {
   m_listView.setMargins(0);
   m_listView.setVerticalCellOverlap(0);
   m_listView.setDecoratorType(ScrollView::Decorator::Type::None);
-  selectionDataSource->setScrollViewDelegate(this);
+  listController->setScrollViewDelegate(this);
   m_scrollBraceView.setMargins(k_margin, k_margin, k_margin, k_margin);
   m_scrollBraceView.setDecoratorType(ScrollView::Decorator::Type::None);
   m_scrollBraceView.setBackgroundColor(KDColorWhite);
diff --git a/apps/solver/equation_list_view.h b/apps/solver/equation_list_view.h
index 59bbaed98..9363c7fe6 100644
--- a/apps/solver/equation_list_view.h
+++ b/apps/solver/equation_list_view.h
@@ -5,6 +5,8 @@
 
 namespace Solver {
 
+class ListController;
+
 class EquationListView : public Responder, public View, public ScrollViewDelegate, public ScrollViewDataSource {
 public:
   enum class BraceStyle {
@@ -12,7 +14,7 @@ public:
     OneRowShort,
     Full
   };
-  EquationListView(Responder * parentResponder, TableViewDataSource * dataSource, SelectableTableViewDataSource * selectionDataSource);
+  EquationListView(ListController * listController);
   void setBraceStyle(BraceStyle style);
   void scrollViewDidChangeOffset(ScrollViewDataSource * scrollViewDataSource) override;
   void didBecomeFirstResponder() override;
diff --git a/apps/solver/equation_models_parameter_controller.cpp b/apps/solver/equation_models_parameter_controller.cpp
index d1ab2622c..67382c589 100644
--- a/apps/solver/equation_models_parameter_controller.cpp
+++ b/apps/solver/equation_models_parameter_controller.cpp
@@ -47,10 +47,14 @@ void EquationModelsParameterController::didBecomeFirstResponder() {
 
 bool EquationModelsParameterController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    Equation * newEquation = static_cast<Equation *>(m_equationStore->addEmptyModel());
-    newEquation->setContent(k_models[selectedRow()]);
+    Ion::Storage::Record::ErrorStatus error = m_equationStore->addEmptyModel();
+    if (error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable) {
+      return false;
+    }
+    assert(error == Ion::Storage::Record::ErrorStatus::None);
+    m_listController->editSelectedRecordWithText(k_models[selectedRow()]);
     app()->dismissModalViewController();
-    m_listController->editExpression(newEquation, Ion::Events::OK);
+    m_listController->editExpression(Ion::Events::OK);
     return true;
   }
   return false;
diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index e5b8d21ab..363aee8d9 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -8,10 +8,10 @@ using namespace Shared;
 namespace Solver {
 
 ListController::ListController(Responder * parentResponder, EquationStore * equationStore, ButtonRowController * footer) :
-  ExpressionModelListController(parentResponder, I18n::Message::AddEquation),
+  StorageExpressionModelListController(parentResponder, I18n::Message::AddEquation),
   ButtonRowDelegate(nullptr, footer),
   m_equationStore(equationStore),
-  m_equationListView(this, this, this),
+  m_equationListView(this),
   m_expressionCells{},
   m_resolveButton(this, equationStore->numberOfDefinedModels() > 1 ? I18n::Message::ResolveSystem : I18n::Message::ResolveEquation, Invocation([](void * context, void * sender) {
     ListController * list = (ListController *)context;
@@ -214,8 +214,8 @@ void ListController::addEmptyModel() {
   app()->displayModalViewController(&m_modelsStackController, 0.f, 0.f, Metric::CommonTopMargin, Metric::CommonRightMargin, 0, Metric::CommonLeftMargin);
 }
 
-bool ListController::removeModelRow(ExpressionModel * model) {
-  ExpressionModelListController::removeModelRow(model);
+bool ListController::removeModelRow(Ion::Storage::Record record) {
+  StorageExpressionModelListController::removeModelRow(record);
   reloadButtonMessage();
   reloadBrace();
   return true;
diff --git a/apps/solver/list_controller.h b/apps/solver/list_controller.h
index 14ca87f87..82137cc7c 100644
--- a/apps/solver/list_controller.h
+++ b/apps/solver/list_controller.h
@@ -2,7 +2,7 @@
 #define SOLVER_LIST_CONTROLLER_H
 
 #include <escher.h>
-#include "../shared/expression_model_list_controller.h"
+#include "../shared/storage_expression_model_list_controller.h"
 #include "../shared/layout_field_delegate.h"
 #include "../shared/text_field_delegate.h"
 #include "equation_store.h"
@@ -12,19 +12,17 @@
 
 namespace Solver {
 
-class ListController : public Shared::ExpressionModelListController, public ButtonRowDelegate, public ListViewDataSource, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
+class ListController : public Shared::StorageExpressionModelListController, public ButtonRowDelegate, public ListViewDataSource, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
 public:
   ListController(Responder * parentResponder, EquationStore * equationStore, ButtonRowController * footer);
   /* ButtonRowDelegate */
   int numberOfButtons(ButtonRowController::Position position) const override;
   Button * buttonAtIndex(int index, ButtonRowController::Position position) const override;
   /* ListViewDataSource */
-  int numberOfRows() override {
-    return numberOfExpressionRows();
-  }
-  KDCoordinate rowHeight(int j) override {
-    return expressionRowHeight(j);
-  }
+  int numberOfRows() override { return numberOfExpressionRows(); }
+  KDCoordinate rowHeight(int j) override{ return StorageExpressionModelListController::memoizedRowHeight(j); }
+  KDCoordinate cumulatedHeightFromIndex(int j) override { return StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
+  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
   int typeAtLocation(int i, int j) override;
   HighlightCell * reusableCell(int index, int type) override;
   int reusableCellCount(int type) override;
@@ -33,7 +31,10 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
   void didBecomeFirstResponder() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
-  void editExpression(Shared::ExpressionModel * model, Ion::Events::Event event) override { return Shared::ExpressionModelListController::editExpression(model, event); }
+  /* StorageExpressionModelListController */
+  // Make methods public
+  void editExpression(Ion::Events::Event event) override { return Shared::StorageExpressionModelListController::editExpression(event); }
+  bool editSelectedRecordWithText(const char * text) override { return Shared::StorageExpressionModelListController::editSelectedRecordWithText(text); }
   /* ViewController */
   View * view() override { return &m_equationListView; }
   /* Text/Layout Field Delegate */
@@ -50,11 +51,14 @@ private:
   SelectableTableView * selectableTableView() override;
   void reloadButtonMessage();
   void addEmptyModel() override;
-  bool removeModelRow(Shared::ExpressionModel * function) override;
+  bool removeModelRow(Ion::Storage::Record record) override;
   void reloadBrace();
-  Shared::ExpressionModelStore * modelStore() override { return m_equationStore; }
+  Shared::StorageExpressionModelStore * modelStore() override { return m_equationStore; }
   StackViewController * stackController() const;
   InputViewController * inputController() override;
+  // ListViewDataSource
+  KDCoordinate notMemoizedCumulatedHeightFromIndex(int j) override { return ListViewDataSource::cumulatedHeightFromIndex(j); }
+  int notMemoizedIndexFromCumulatedHeight(KDCoordinate offsetY) override { return ListViewDataSource::indexFromCumulatedHeight(offsetY); }
   EquationStore * m_equationStore;
   EquationListView m_equationListView;
   EvenOddExpressionCell m_expressionCells[k_maxNumberOfRows];

From 09bc4f27e9ebbdc04ae85b33ef26d30e2fd63329 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 25 Feb 2019 10:18:49 +0100
Subject: [PATCH 110/295] [ion] Add Macro to log the storage content

---
 ion/Makefile               |  4 ++++
 ion/include/ion/storage.h  |  8 ++++++++
 ion/src/shared/storage.cpp | 21 +++++++++++++++++++++
 3 files changed, 33 insertions(+)

diff --git a/ion/Makefile b/ion/Makefile
index 28aeb0bc2..b2ea8e4ba 100644
--- a/ion/Makefile
+++ b/ion/Makefile
@@ -35,3 +35,7 @@ tests += $(addprefix ion/test/,\
   storage.cpp\
   utf8_decoder.cpp\
 )
+
+ifdef ION_STORAGE_LOG
+SFLAGS += -DION_STORAGE_LOG=1
+endif
\ No newline at end of file
diff --git a/ion/include/ion/storage.h b/ion/include/ion/storage.h
index ea59a185f..26867768c 100644
--- a/ion/include/ion/storage.h
+++ b/ion/include/ion/storage.h
@@ -48,6 +48,9 @@ public:
     bool operator!=(const Record & other) const {
       return !(*this == other);
     }
+#if ION_STORAGE_LOG
+    void log();
+#endif
     uint32_t checksum();
     bool isNull() const {
       return m_fullNameCRC32 == 0;
@@ -76,6 +79,11 @@ public:
   };
 
   Storage();
+
+#if ION_STORAGE_LOG
+  void log();
+#endif
+
   size_t availableSize();
   uint32_t checksum();
 
diff --git a/ion/src/shared/storage.cpp b/ion/src/shared/storage.cpp
index e9ca40a02..7e007851f 100644
--- a/ion/src/shared/storage.cpp
+++ b/ion/src/shared/storage.cpp
@@ -2,6 +2,9 @@
 #include <string.h>
 #include <assert.h>
 #include <new>
+#if ION_STORAGE_LOG
+#include<iostream>
+#endif
 
 namespace Ion {
 
@@ -49,6 +52,15 @@ Storage::Record::Record(const char * baseName, const char * extension) {
   new (this) Record(baseName, strlen(baseName), extension, strlen(extension));
 }
 
+
+#if ION_STORAGE_LOG
+
+void Storage::Record::log() {
+  std::cout << "Name: " << fullName() << std::endl;
+  std::cout << "        Value (" << value().size << "): " << (char *)value().buffer << "\n\n" << std::endl;
+}
+#endif
+
 uint32_t Storage::Record::checksum() {
   uint32_t crc32Results[2];
   crc32Results[0] = m_fullNameCRC32;
@@ -82,6 +94,15 @@ Storage::Storage() :
   overrideSizeAtPosition(m_buffer, 0);
 }
 
+#if ION_STORAGE_LOG
+void Storage::log() {
+  for (char * p : *this) {
+    const char * currentName = fullNameOfRecordStarting(p);
+    Record(currentName).log();
+  }
+}
+#endif
+
 size_t Storage::availableSize() {
   return k_storageSize-(endBuffer()-m_buffer)-sizeof(record_size_t);
 }

From 064083485dee0161226a3b05d2c488923722258d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 25 Feb 2019 10:19:10 +0100
Subject: [PATCH 111/295] [poincare] Test: correctly clean the storage after
 tests

---
 poincare/test/user_variable.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index 7a235103c..e946689c0 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -39,7 +39,7 @@ QUIZ_CASE(poincare_user_variable_simple) {
   Ion::Storage::sharedStorage()->recordNamed("Adadas.exp").destroy();
   Ion::Storage::sharedStorage()->recordNamed("f1.func").destroy();
   Ion::Storage::sharedStorage()->recordNamed("f2.func").destroy();
-  Ion::Storage::sharedStorage()->recordNamed("funcBoth.func").destroy();
+  Ion::Storage::sharedStorage()->recordNamed("fBoth.func").destroy();
 }
 
 QUIZ_CASE(poincare_user_variable_2_circular_variables) {

From 6566b084002a5a84e420efea12c1c679bc386461 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 25 Feb 2019 10:20:09 +0100
Subject: [PATCH 112/295] [solver] Fix tests with new Equation API

---
 apps/solver/test/equation_store.cpp | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index 3849d2ad6..942bcd8fc 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -11,22 +11,31 @@ using namespace Poincare;
 
 namespace Solver {
 
+void addEquationWithText(EquationStore * equationStore, const char * text) {
+  Ion::Storage::Record::ErrorStatus err = equationStore->addEmptyModel();
+  assert(err == Ion::Storage::Record::ErrorStatus::None);
+  Ion::Storage::Record record = equationStore->recordAtIndex(equationStore->numberOfModels()-1);
+  Shared::ExpiringPointer<Equation> model = equationStore->modelForRecord(record);
+  model->setContent(text);
+}
+
 void assert_equation_system_exact_solve_to(const char * equations[], EquationStore::Error error, EquationStore::Type type, const char * variables[], const char * solutions[], int numberOfSolutions) {
   Shared::GlobalContext globalContext;
   EquationStore equationStore;
   int index = 0;
   while (equations[index] != 0) {
-    Shared::ExpressionModel * e = equationStore.addEmptyModel();
-    e->setContent(equations[index++]);
+    addEquationWithText(&equationStore, equations[index++]);
   }
   EquationStore::Error err = equationStore.exactSolve(&globalContext);
   quiz_assert(err == error);
   if (err != EquationStore::Error::NoError) {
+    equationStore.removeAll();
     return;
   }
   quiz_assert(equationStore.type() == type);
   quiz_assert(equationStore.numberOfSolutions() == numberOfSolutions);
   if (numberOfSolutions == INT_MAX) {
+    equationStore.removeAll();
     return;
   }
   if (type == EquationStore::Type::LinearSystem) {
@@ -42,13 +51,13 @@ void assert_equation_system_exact_solve_to(const char * equations[], EquationSto
     equationStore.exactSolutionLayoutAtIndex(i, true).serializeForParsing(buffer, bufferSize);
     quiz_assert(strcmp(buffer, solutions[i]) == 0);
   }
+  equationStore.removeAll();
 }
 
 void assert_equation_approximate_solve_to(const char * equations, double xMin, double xMax, const char * variable, double solutions[], int numberOfSolutions, bool hasMoreSolutions) {
   Shared::GlobalContext globalContext;
   EquationStore equationStore;
-  Shared::ExpressionModel * e = equationStore.addEmptyModel();
-  e->setContent(equations);
+  addEquationWithText(&equationStore, equations);
   EquationStore::Error err = equationStore.exactSolve(&globalContext);
   quiz_assert(err == EquationStore::Error::RequireApproximateSolution);
   equationStore.setIntervalBound(0, xMin);
@@ -60,6 +69,7 @@ void assert_equation_approximate_solve_to(const char * equations, double xMin, d
     quiz_assert(std::fabs(equationStore.approximateSolutionAtIndex(i) - solutions[i]) < 1E-5);
   }
   quiz_assert(equationStore.haveMoreApproximationSolutions(&globalContext) == hasMoreSolutions);
+  equationStore.removeAll();
 }
 
 QUIZ_CASE(equation_solve) {

From 3088a4ee231055d7683fa8532a71ec9356fc133a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 25 Feb 2019 14:22:34 +0100
Subject: [PATCH 113/295] [apps/shared] Split ExpressionModelHandle into
 ExpressionModelHandle and SingleExpressionModelHandle (in perspective of
 Sequence model who will be composed of 3 ExpressionModelHandle)

---
 .../storage_cartesian_function_store.cpp      |   2 +-
 apps/graph/storage_cartesian_function_store.h |   2 +-
 apps/shared/Makefile                          |   1 +
 apps/shared/expression_model_handle.cpp       | 101 +++++++-----------
 apps/shared/expression_model_handle.h         |  52 ++++-----
 .../shared/single_expression_model_handle.cpp |  27 +++++
 apps/shared/single_expression_model_handle.h  |  44 ++++++++
 apps/shared/storage_cartesian_function.cpp    |   8 ++
 apps/shared/storage_cartesian_function.h      |  16 ++-
 ...orage_expression_model_list_controller.cpp |  12 +--
 ...storage_expression_model_list_controller.h |   2 +-
 .../shared/storage_expression_model_store.cpp |   8 +-
 apps/shared/storage_expression_model_store.h  |  14 +--
 apps/shared/storage_function.h                |   6 +-
 apps/shared/storage_function_store.h          |   4 +-
 apps/solver/equation.cpp                      |  30 ++++--
 apps/solver/equation.h                        |  19 +++-
 apps/solver/equation_store.cpp                |   2 +-
 apps/solver/equation_store.h                  |   2 +-
 19 files changed, 216 insertions(+), 136 deletions(-)
 create mode 100644 apps/shared/single_expression_model_handle.cpp
 create mode 100644 apps/shared/single_expression_model_handle.h

diff --git a/apps/graph/storage_cartesian_function_store.cpp b/apps/graph/storage_cartesian_function_store.cpp
index 4b145b352..57a0721bd 100644
--- a/apps/graph/storage_cartesian_function_store.cpp
+++ b/apps/graph/storage_cartesian_function_store.cpp
@@ -20,7 +20,7 @@ void StorageCartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion:
   m_functions[cacheIndex] = StorageCartesianFunction(record);
 }
 
-ExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
+SingleExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_functions[cacheIndex];
 }
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index 865faad0e..f81cd49b5 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -16,7 +16,7 @@ private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Shared::GlobalContext::funcExtension; }
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
   mutable Shared::StorageCartesianFunction m_functions[k_maxNumberOfMemoizedModels];
 };
 
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index bc6af6116..9176ba56d 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -52,6 +52,7 @@ app_src += $(addprefix apps/shared/,\
   scrollable_exact_approximate_expressions_view.cpp \
   separator_even_odd_buffer_text_cell.cpp \
   simple_interactive_curve_view_controller.cpp \
+  single_expression_model_handle.cpp\
   storage_cartesian_function.cpp \
   storage_expression_model_list_controller.cpp \
   storage_expression_model_store.cpp \
diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index cf8f424e3..65ea9d96e 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -11,16 +11,15 @@ using namespace Poincare;
 
 namespace Shared {
 
-ExpressionModelHandle::ExpressionModelHandle(Storage::Record record) :
-  Storage::Record(record),
+ExpressionModelHandle::ExpressionModelHandle() :
   m_expression(),
   m_layout(),
   m_circular(-1)
 {
 }
 
-void ExpressionModelHandle::text(char * buffer, size_t bufferSize) const {
-  Expression e = expressionClone();
+void ExpressionModelHandle::text(const Storage::Record * record, char * buffer, size_t bufferSize) const {
+  Expression e = expressionClone(record);
   if (e.isUninitialized() && bufferSize > 0) {
     buffer[0] = 0;
   } else {
@@ -28,37 +27,35 @@ void ExpressionModelHandle::text(char * buffer, size_t bufferSize) const {
   }
 }
 
-bool ExpressionModelHandle::isCircularlyDefined(Poincare::Context * context) const {
+bool ExpressionModelHandle::isCircularlyDefined(const Storage::Record * record, Poincare::Context * context) const {
   if (m_circular == -1) {
-    m_circular = Expression::ExpressionWithoutSymbols(expressionClone(), *context).isUninitialized();
+    m_circular = Expression::ExpressionWithoutSymbols(expressionClone(record), *context).isUninitialized();
   }
   return m_circular;
 }
 
-Expression ExpressionModelHandle::expressionReduced(Poincare::Context * context) const {
+Expression ExpressionModelHandle::expressionReduced(const Storage::Record * record, Poincare::Context * context) const {
   if (m_expression.isUninitialized()) {
-    assert(!isNull());
-    Ion::Storage::Record::Data recordData = value();
-    m_expression = Expression::ExpressionFromAddress(expressionAddressForValue(recordData), expressionSizeForValue(recordData));
+    assert(record->fullName() != nullptr);
+    m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
     PoincareHelpers::Simplify(&m_expression, *context);
     // simplify might return an uninitialized Expression if interrupted
     if (m_expression.isUninitialized()) {
-      m_expression = Expression::ExpressionFromAddress(expressionAddressForValue(recordData), expressionSizeForValue(recordData));
+      m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
     }
   }
   return m_expression;
 }
 
-Expression ExpressionModelHandle::expressionClone() const {
-  assert(!isNull());
-  Ion::Storage::Record::Data recordData = value();
+Expression ExpressionModelHandle::expressionClone(const Storage::Record * record) const {
+  assert(record->fullName() != nullptr);
   /* A new Expression has to be created at each call (because it might be tempered with after calling) */
-  return Expression::ExpressionFromAddress(expressionAddressForValue(recordData), expressionSizeForValue(recordData));
+  return Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
 }
 
-Layout ExpressionModelHandle::layout() {
+Layout ExpressionModelHandle::layout(const Storage::Record * record) const {
   if (m_layout.isUninitialized()) {
-    m_layout = PoincareHelpers::CreateLayout(expressionClone());
+    m_layout = PoincareHelpers::CreateLayout(expressionClone(record));
     if (m_layout.isUninitialized()) {
       m_layout = HorizontalLayout::Builder();
     }
@@ -66,46 +63,20 @@ Layout ExpressionModelHandle::layout() {
   return m_layout;
 }
 
-bool ExpressionModelHandle::isDefined() {
-  return !isEmpty();
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(Ion::Storage::Record * record, const char * c, char symbol) {
+  Expression e = ExpressionModelHandle::BuildExpressionFromText(c, symbol);
+  return setExpressionContent(record, e);
 }
 
-bool ExpressionModelHandle::isEmpty() {
-  return value().size <= metaDataSize();
-}
-
-void ExpressionModelHandle::tidyExpressionModel() {
-  m_layout = Layout();
-  m_expression = Expression();
-  m_circular = 0;
-}
-
-void ExpressionModelHandle::tidy() {
-  tidyExpressionModel();
-}
-
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(const char * c) {
-  Expression expressionToStore;
-  // if c = "", we want to reinit the Expression
-  if (c && *c != 0) {
-    // Compute the expression to store, without replacing symbols
-    expressionToStore = Expression::Parse(c);
-    if (!expressionToStore.isUninitialized() && symbol() != 0) {
-      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol()));
-    }
-  }
-  return setExpressionContent(expressionToStore);
-}
-
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Expression & expressionToStore) {
-  assert(!isNull());
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ion::Storage::Record * record, Expression & expressionToStore) {
+  assert(record->fullName() != nullptr);
   // Prepare the new data to store
-  Ion::Storage::Record::Data newData = value();
+  Ion::Storage::Record::Data newData = record->value();
   size_t expressionToStoreSize = expressionToStore.isUninitialized() ? 0 : expressionToStore.size();
-  newData.size = metaDataSize() + expressionToStoreSize;
+  newData.size = newData.size - expressionSize(record) + expressionToStoreSize;
 
   // Set the data
-  Ion::Storage::Record::ErrorStatus error = setValue(newData);
+  Ion::Storage::Record::ErrorStatus error = record->setValue(newData);
   if (error != Ion::Storage::Record::ErrorStatus::None) {
     assert(error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable);
     return error;
@@ -113,21 +84,31 @@ Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ex
 
   // Copy the expression if needed
   if (!expressionToStore.isUninitialized()) {
-    memcpy(expressionAddressForValue(value()), expressionToStore.addressInPool(), expressionToStore.size());
+    memcpy(expressionAddress(record), expressionToStore.addressInPool(), expressionToStore.size());
   }
-  /* We cannot call tidy here because tidy is a virtual function and does not
-   * do the same thing for all children class. And here we want to delete only
-   * the elements relative to the ExpressionModel. */
-  tidyExpressionModel();
+  /* Here we delete only the elements relative to the expression model kept in
+   * this handle. */
+  tidy();
   return error;
 }
 
-void * ExpressionModelHandle::expressionAddressForValue(Ion::Storage::Record::Data recordData) const {
-  return (char *)recordData.buffer+metaDataSize();
+void ExpressionModelHandle::tidy() const {
+  m_layout = Layout();
+  m_expression = Expression();
+  m_circular = 0;
 }
 
-size_t ExpressionModelHandle::expressionSizeForValue(Ion::Storage::Record::Data recordData) const {
-  return recordData.size-metaDataSize();
+Poincare::Expression ExpressionModelHandle::BuildExpressionFromText(const char * c, char symbol) {
+  Expression expressionToStore;
+  // if c = "", we want to reinit the Expression
+  if (c && *c != 0) {
+    // Compute the expression to store, without replacing symbols
+    expressionToStore = Expression::Parse(c);
+    if (!expressionToStore.isUninitialized() && symbol != 0) {
+      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol));
+    }
+  }
+  return expressionToStore;
 }
 
 }
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index b034e6ec9..08f1accf2 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -4,47 +4,37 @@
 #include <poincare/context.h>
 #include <poincare/expression.h>
 #include <poincare/layout.h>
-#include <ion/storage.h>
 
 namespace Shared {
 
 // ExpressionModelHandle is a handle to Ion::Record
 
-class ExpressionModelHandle : public Ion::Storage::Record {
-  // TODO find better name (once we remove ExpressionModel?)
+class ExpressionModelHandle {
 public:
-  ExpressionModelHandle(Ion::Storage::Record record);
-  virtual char symbol() const { return 0; };
-  void text(char * buffer, size_t bufferSize) const;
-  Poincare::Expression expressionReduced(Poincare::Context * context) const;
-  Poincare::Expression expressionClone() const;
-  Poincare::Layout layout();
-  /* TODO This comment will be true when Sequence inherits from this class
-   * Here, isDefined is the exact contrary of isEmpty. However, for Sequence
-   * inheriting from ExpressionModel, isEmpty and isDefined have not exactly
-   * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
-   * not defined. We thus have to keep both methods. */
-  virtual bool isDefined();
-  virtual bool isEmpty();
-  virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
-  /* tidy is responsible to tidy the whole model whereas tidyExpressionModel
-   * tidies only the members associated with the ExpressionModel. In
-   * ExpressionModelHandle, tidy and tidyExpressionModel trigger the same
-   * behaviour but it is not true for its child classes (for example, in
-   * Sequence). */
-  virtual void tidy();
-  virtual void tidyExpressionModel();
-  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c);
-  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e);
+  ExpressionModelHandle();
+
+  // Getters
+  void text(const Ion::Storage::Record * record, char * buffer, size_t bufferSize) const;
+  Poincare::Expression expressionReduced(const Ion::Storage::Record * record, Poincare::Context * context) const;
+  Poincare::Expression expressionClone(const Ion::Storage::Record * record) const;
+  Poincare::Layout layout(const Ion::Storage::Record * record) const;
+
+  // Setters
+  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0);
+  Ion::Storage::Record::ErrorStatus setExpressionContent(Ion::Storage::Record * record, Poincare::Expression & e);
+
+  // Property
+  bool isCircularlyDefined(const Ion::Storage::Record * record, Poincare::Context * context) const;
+  virtual void * expressionAddress(const Ion::Storage::Record * record) const = 0;
+
+  virtual void tidy() const;
 protected:
-  virtual size_t metaDataSize() const = 0;
-  Ion::Storage::Record record() const;
-  bool isCircularlyDefined(Poincare::Context * context) const;
+  // Setters helper
+  static Poincare::Expression BuildExpressionFromText(const char * c, char symbol = 0);
   mutable Poincare::Expression m_expression;
   mutable Poincare::Layout m_layout;
 private:
-  void * expressionAddressForValue(Ion::Storage::Record::Data recordData) const;
-  size_t expressionSizeForValue(Ion::Storage::Record::Data recordData) const;
+  virtual size_t expressionSize(const Ion::Storage::Record * record) const = 0;
   mutable int m_circular;
 };
 
diff --git a/apps/shared/single_expression_model_handle.cpp b/apps/shared/single_expression_model_handle.cpp
new file mode 100644
index 000000000..ef0037c73
--- /dev/null
+++ b/apps/shared/single_expression_model_handle.cpp
@@ -0,0 +1,27 @@
+#include "single_expression_model_handle.h"
+#include "global_context.h"
+#include "poincare_helpers.h"
+#include <poincare/horizontal_layout.h>
+#include <string.h>
+#include <cmath>
+#include <assert.h>
+
+using namespace Ion;
+using namespace Poincare;
+
+namespace Shared {
+
+SingleExpressionModelHandle::SingleExpressionModelHandle(Storage::Record record) :
+  Storage::Record(record)
+{
+}
+
+bool SingleExpressionModelHandle::isDefined() {
+  return !isEmpty();
+}
+
+bool SingleExpressionModelHandle::isEmpty() {
+  return value().size <= metaDataSize();
+}
+
+}
diff --git a/apps/shared/single_expression_model_handle.h b/apps/shared/single_expression_model_handle.h
new file mode 100644
index 000000000..8590515ed
--- /dev/null
+++ b/apps/shared/single_expression_model_handle.h
@@ -0,0 +1,44 @@
+#ifndef SHARED_SINGLE_EXPRESSION_MODEL_HANDLE_H
+#define SHARED_SINGLE_EXPRESSION_MODEL_HANDLE_H
+
+#include "expression_model_handle.h"
+
+namespace Shared {
+
+
+class SingleExpressionModelHandle : public Ion::Storage::Record {
+public:
+  SingleExpressionModelHandle(Ion::Storage::Record record);
+
+  // Property
+  virtual char symbol() const { return 0; };
+  void text(char * buffer, size_t bufferSize) const { return handle()->text(this, buffer, bufferSize); }
+  Poincare::Expression expressionReduced(Poincare::Context * context) const { return handle()->expressionReduced(this, context); }
+  Poincare::Expression expressionClone() const { return handle()->expressionClone(this); }
+  Poincare::Layout layout() { return handle()->layout(this); }
+  /* TODO This comment will be true when Sequence inherits from this class
+   * Here, isDefined is the exact contrary of isEmpty. However, for Sequence
+   * inheriting from ExpressionModel, isEmpty and isDefined have not exactly
+   * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
+   * not defined. We thus have to keep both methods. */
+  virtual bool isDefined();
+  virtual bool isEmpty();
+  virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
+  /* tidy is responsible to tidy the whole model whereas tidyExpressionModel
+   * tidies only the members associated with the ExpressionModel. In
+   * ExpressionModelHandle, tidy and tidyExpressionModel trigger the same
+   * behaviour but it is not true for its child classes (for example, in
+   * Sequence). */
+  virtual void tidy() { handle()->tidy(); }
+  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c, symbol()); }
+  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableHandle()->setExpressionContent(this, e); }
+protected:
+  bool isCircularlyDefined(Poincare::Context * context) const { return handle()->isCircularlyDefined(this, context); }
+  ExpressionModelHandle * editableHandle() { return const_cast<ExpressionModelHandle *>(handle()); }
+  virtual const ExpressionModelHandle * handle() const = 0;
+  virtual size_t metaDataSize() const = 0;
+};
+
+}
+
+#endif
diff --git a/apps/shared/storage_cartesian_function.cpp b/apps/shared/storage_cartesian_function.cpp
index 5bdf59ced..ad76296f0 100644
--- a/apps/shared/storage_cartesian_function.cpp
+++ b/apps/shared/storage_cartesian_function.cpp
@@ -123,6 +123,14 @@ Expression::Coordinate2D StorageCartesianFunction::nextIntersectionFrom(double s
   return PoincareHelpers::NextIntersection(expressionReduced(context), unknownX, start, step, max, *context, e);
 }
 
+void * StorageCartesianFunction::Handle::expressionAddress(const Ion::Storage::Record * record) const {
+  return (char *)record->value().buffer+sizeof(CartesianFunctionRecordData);
+}
+
+size_t StorageCartesianFunction::Handle::expressionSize(const Ion::Storage::Record * record) const {
+  return record->value().size-sizeof(CartesianFunctionRecordData);
+}
+
 StorageCartesianFunction::CartesianFunctionRecordData * StorageCartesianFunction::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
diff --git a/apps/shared/storage_cartesian_function.h b/apps/shared/storage_cartesian_function.h
index 722a07d99..0fb157e4d 100644
--- a/apps/shared/storage_cartesian_function.h
+++ b/apps/shared/storage_cartesian_function.h
@@ -16,16 +16,21 @@ public:
   StorageCartesianFunction(Ion::Storage::Record record = Record()) :
     StorageFunction(record)
   {}
+
+  // Derivative
   bool displayDerivative() const;
   void setDisplayDerivative(bool display);
   int derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg);
   double approximateDerivative(double x, Poincare::Context * context) const;
+  // Integral
   double sumBetweenBounds(double start, double end, Poincare::Context * context) const override;
+  // Extremum
   Poincare::Expression::Coordinate2D nextMinimumFrom(double start, double step, double max, Poincare::Context * context) const;
   Poincare::Expression::Coordinate2D nextMaximumFrom(double start, double step, double max, Poincare::Context * context) const;
+  // Roots
   double nextRootFrom(double start, double step, double max, Poincare::Context * context) const;
   Poincare::Expression::Coordinate2D nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Poincare::Expression expression) const;
-protected:
+private:
   class CartesianFunctionRecordData : public FunctionRecordData {
   public:
     CartesianFunctionRecordData(KDColor color) :
@@ -40,9 +45,16 @@ protected:
      * the expression of the function, directly copied from the pool. */
     //char m_expression[0];
   };
-private:
+  class Handle : public ExpressionModelHandle {
+  public:
+    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  private:
+    size_t expressionSize(const Ion::Storage::Record * record) const override;
+  };
   size_t metaDataSize() const override { return sizeof(CartesianFunctionRecordData); }
+  const ExpressionModelHandle * handle() const override { return &m_handle; }
   CartesianFunctionRecordData * recordData() const;
+  Handle m_handle;
 };
 
 }
diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 55ad03508..95c88cc1c 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -145,7 +145,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
   if (isAddEmptyRow(j)) {
     return Metric::StoreRowHeight;
   }
-  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<SingleExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   if (m->layout().isUninitialized()) {
     return Metric::StoreRowHeight;
   }
@@ -156,7 +156,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
 
 void StorageExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   EvenOddExpressionCell * myCell = (EvenOddExpressionCell *)cell;
-  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<SingleExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   myCell->setLayout(m->layout());
 }
 
@@ -176,7 +176,7 @@ bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::
   }
   if (event == Ion::Events::Backspace && !isAddEmptyRow(selectedRow())) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<ExpressionModelHandle> model =  modelStore()->modelForRecord(record);
+    ExpiringPointer<SingleExpressionModelHandle> model =  modelStore()->modelForRecord(record);
     if (model->shouldBeClearedBeforeRemove()) {
       reinitSelectedExpression(model);
     } else {
@@ -206,7 +206,7 @@ void StorageExpressionModelListController::addEmptyModel() {
   editExpression(Ion::Events::OK);
 }
 
-void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
+void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model) {
   model->setContent("");
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
@@ -219,7 +219,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
   char initialTextContent[initialTextContentMaxSize];
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
+    ExpiringPointer<SingleExpressionModelHandle> model = modelStore()->modelForRecord(record);
     model->text(initialTextContent, initialTextContentMaxSize);
     initialText = initialTextContent;
     // Replace Poincare::Symbol::SpecialSymbols::UnknownX with 'x'
@@ -246,7 +246,7 @@ bool StorageExpressionModelListController::editSelectedRecordWithText(const char
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-  ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
+  ExpiringPointer<SingleExpressionModelHandle> model = modelStore()->modelForRecord(record);
   return (model->setContent(text) == Ion::Storage::Record::ErrorStatus::None);
 }
 
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index f4976ccbf..dd9b7107b 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -25,7 +25,7 @@ protected:
   bool handleEventOnExpression(Ion::Events::Event event);
   virtual void addEmptyModel();
   virtual void didChangeModelsList() { resetMemoization(); }
-  virtual void reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model);
+  virtual void reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model);
   virtual void editExpression(Ion::Events::Event event);
   virtual bool editSelectedRecordWithText(const char * text);
   virtual bool removeModelRow(Ion::Storage::Record record);
diff --git a/apps/shared/storage_expression_model_store.cpp b/apps/shared/storage_expression_model_store.cpp
index 2a385730c..335d51a18 100644
--- a/apps/shared/storage_expression_model_store.cpp
+++ b/apps/shared/storage_expression_model_store.cpp
@@ -15,14 +15,14 @@ Ion::Storage::Record StorageExpressionModelStore::recordAtIndex(int i) const {
   return Ion::Storage::sharedStorage()->recordWithExtensionAtIndex(modelExtension(), i);
 }
 
-ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
+SingleExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
   for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (!memoizedModelAtIndex(i)->isNull() && *memoizedModelAtIndex(i) == record) {
       return memoizedModelAtIndex(i);
     }
   }
   setMemoizedModelAtIndex(m_oldestMemoizedIndex, record);
-  ExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
+  SingleExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
   m_oldestMemoizedIndex = (m_oldestMemoizedIndex+1) % maxNumberOfMemoizedModels();
   return result;
 }
@@ -44,7 +44,7 @@ void StorageExpressionModelStore::tidy() {
 int StorageExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) const {
   int result = 0;
   int i = 0;
-  ExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
+  SingleExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
   while (!m->isNull()) {
     if (test(m)) {
       result++;
@@ -59,7 +59,7 @@ Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(in
   int index = 0;
   int currentModelIndex = 0;
   Ion::Storage::Record r = recordAtIndex(currentModelIndex++);
-  ExpressionModelHandle * m = privateModelForRecord(r);
+  SingleExpressionModelHandle * m = privateModelForRecord(r);
   while (!m->isNull()) {
     assert(currentModelIndex <= numberOfModels());
     if (test(m)) {
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/storage_expression_model_store.h
index d681c0749..41cb5115c 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/storage_expression_model_store.h
@@ -1,7 +1,7 @@
 #ifndef SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 #define SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 
-#include "expression_model_handle.h"
+#include "single_expression_model_handle.h"
 #include "expiring_pointer.h"
 #include <ion/storage.h>
 #include <assert.h>
@@ -19,10 +19,10 @@ public:
   // By default, the number of models is not bounded
   virtual int maxNumberOfModels() const { return -1; }
   int numberOfModels() const;
-  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined(); }); }
+  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](SingleExpressionModelHandle * m) { return m->isDefined(); }); }
   Ion::Storage::Record recordAtIndex(int i) const;
-  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined(); }); }
-  ExpiringPointer<ExpressionModelHandle> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<ExpressionModelHandle>(privateModelForRecord(record)); }
+  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](SingleExpressionModelHandle * m) { return m->isDefined(); }); }
+  ExpiringPointer<SingleExpressionModelHandle> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<SingleExpressionModelHandle>(privateModelForRecord(record)); }
 
   // Add and Remove
   virtual Ion::Storage::Record::ErrorStatus addEmptyModel() = 0;
@@ -35,14 +35,14 @@ public:
 protected:
   constexpr static int k_maxNumberOfMemoizedModels = 10;
   int maxNumberOfMemoizedModels() const { return maxNumberOfModels() < 0 ? k_maxNumberOfMemoizedModels : maxNumberOfModels(); }
-  typedef bool (*ModelTest)(ExpressionModelHandle * model);
+  typedef bool (*ModelTest)(SingleExpressionModelHandle * model);
   int numberOfModelsSatisfyingTest(ModelTest test) const;
   Ion::Storage::Record recordStatifyingTestAtIndex(int i, ModelTest test) const;
-  ExpressionModelHandle * privateModelForRecord(Ion::Storage::Record record) const;
+  SingleExpressionModelHandle * privateModelForRecord(Ion::Storage::Record record) const;
 private:
   void resetMemoizedModelsExceptRecord(const Ion::Storage::Record record = Ion::Storage::Record()) const;
   virtual void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record) const = 0;
-  virtual ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const = 0;
+  virtual SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const = 0;
   virtual const char * modelExtension() const = 0;
   /* Memoization of k_maxNumberOfMemoizedModels. When the required model is not
    * present, we override the m_oldestMemoizedIndex model. This actually
diff --git a/apps/shared/storage_function.h b/apps/shared/storage_function.h
index 45596bbc7..9f8e50a19 100644
--- a/apps/shared/storage_function.h
+++ b/apps/shared/storage_function.h
@@ -2,11 +2,11 @@
 #define SHARED_STORAGE_FUNCTION_H
 
 #include <poincare/function.h>
-#include "expression_model_handle.h"
+#include "single_expression_model_handle.h"
 
 namespace Shared {
 
-class StorageFunction : public ExpressionModelHandle {
+class StorageFunction : public SingleExpressionModelHandle {
 public:
   enum class NameNotCompliantError {
     None = 0,
@@ -20,7 +20,7 @@ public:
   static bool BaseNameCompliant(const char * baseName, NameNotCompliantError * error = nullptr);
 
   // Constructors
-  StorageFunction(Ion::Storage::Record record) : ExpressionModelHandle(record){}
+  StorageFunction(Ion::Storage::Record record) : SingleExpressionModelHandle(record){}
 
   // Properties
   bool isActive() const;
diff --git a/apps/shared/storage_function_store.h b/apps/shared/storage_function_store.h
index a5b08608e..767d9c173 100644
--- a/apps/shared/storage_function_store.h
+++ b/apps/shared/storage_function_store.h
@@ -14,8 +14,8 @@ public:
   StorageFunctionStore() : StorageExpressionModelStore() {}
   uint32_t storeChecksum();
   // An active function must be defined to be counted
-  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
-  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
+  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](SingleExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
+  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](SingleExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
 
   ExpiringPointer<StorageFunction> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<StorageFunction>(static_cast<StorageFunction *>(privateModelForRecord(record))); }
 
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index af923c078..7352ba583 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -6,6 +6,7 @@
 #include <poincare/rational.h>
 #include <ion/unicode/utf8_helper.h>
 
+using namespace Ion;
 using namespace Poincare;
 using namespace Shared;
 
@@ -14,20 +15,17 @@ namespace Solver {
 constexpr char Equation::extension[];
 
 Equation::Equation(Ion::Storage::Record record) :
-  ExpressionModelHandle(record),
-  m_standardForm()
+  SingleExpressionModelHandle(record)
 {
 }
 
-void Equation::tidyExpressionModel() {
-  ExpressionModelHandle::tidyExpressionModel();
-  // Free the pool of the m_standardForm
-  m_standardForm = Expression();
+bool Equation::containsIComplex(Context * context) const {
+  return expressionClone().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
 }
 
-Expression Equation::standardForm(Context * context) const {
+Expression Equation::Handle::standardForm(const Storage::Record * record, Context * context) const {
   if (m_standardForm.isUninitialized()) {
-    const Expression e = expressionReduced(context);
+    const Expression e = expressionReduced(record, context);
     if (e.type() == ExpressionNode::Type::Unreal) {
       m_standardForm = Unreal::Builder();
       return m_standardForm;
@@ -38,7 +36,7 @@ Expression Equation::standardForm(Context * context) const {
     }
     if (e.type() == ExpressionNode::Type::Equal) {
       Preferences * preferences = Preferences::sharedPreferences();
-      m_standardForm = static_cast<const Equal&>(e).standardEquation(*context, Expression::UpdatedComplexFormatWithExpressionInput(preferences->complexFormat(), expressionClone(), *context), preferences->angleUnit());
+      m_standardForm = static_cast<const Equal&>(e).standardEquation(*context, Expression::UpdatedComplexFormatWithExpressionInput(preferences->complexFormat(), expressionClone(record), *context), preferences->angleUnit());
     } else {
       assert(e.type() == ExpressionNode::Type::Rational && static_cast<const Rational&>(e).isOne());
       // The equality was reduced which means the equality was always true.
@@ -48,8 +46,18 @@ Expression Equation::standardForm(Context * context) const {
   return m_standardForm;
 }
 
-bool Equation::containsIComplex(Context * context) const {
-  return expressionClone().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
+void Equation::Handle::tidy() const {
+  ExpressionModelHandle::tidy();
+  // Free the pool of the m_standardForm
+  m_standardForm = Expression();
+}
+
+void * Equation::Handle::expressionAddress(const Ion::Storage::Record * record) const {
+  return (char *)record->value().buffer;
+}
+
+size_t Equation::Handle::expressionSize(const Ion::Storage::Record * record) const {
+  return record->value().size;
 }
 
 }
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index 222bb19b3..6db7e8249 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -1,24 +1,33 @@
 #ifndef SOLVER_EQUATION_h
 #define SOLVER_EQUATION_h
 
-#include "../shared/expression_model_handle.h"
+#include "../shared/single_expression_model_handle.h"
 
 namespace Solver {
 
-class Equation : public Shared::ExpressionModelHandle {
+class Equation : public Shared::SingleExpressionModelHandle {
 public:
   Equation(Ion::Storage::Record record = Record());
-  void tidyExpressionModel() override;
   bool shouldBeClearedBeforeRemove() override {
     return false;
   }
-  Poincare::Expression standardForm(Poincare::Context * context) const;
+  Poincare::Expression standardForm(Poincare::Context * context) const { return m_handle.standardForm(this, context); }
   bool containsIComplex(Poincare::Context * context) const;
 
   static constexpr char extension[] = "eq"; // TODO: store this elsewhere?
 private:
+  class Handle : public Shared::ExpressionModelHandle {
+  public:
+    Poincare::Expression standardForm(const Ion::Storage::Record * record, Poincare::Context * context) const;
+    void tidy() const override;
+    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  private:
+    size_t expressionSize(const Ion::Storage::Record * record) const override;
+    mutable Poincare::Expression m_standardForm;
+  };
   size_t metaDataSize() const override { return 0; }
-  mutable Poincare::Expression m_standardForm;
+  const Shared::ExpressionModelHandle * handle() const override { return &m_handle; }
+  Handle m_handle;
 };
 
 }
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index 116fbce32..3cbe557bd 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -49,7 +49,7 @@ void EquationStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record
   m_equations[cacheIndex] = Equation(record);
 }
 
-ExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) const {
+SingleExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_equations[cacheIndex];
 }
diff --git a/apps/solver/equation_store.h b/apps/solver/equation_store.h
index 175d20177..2d03d4a05 100644
--- a/apps/solver/equation_store.h
+++ b/apps/solver/equation_store.h
@@ -82,7 +82,7 @@ private:
   /* We don't really use model memoization as the number of Equation is limited
    * and we keep enough Equations to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
 
   Error resolveLinearSystem(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression coefficients[k_maxNumberOfEquations][Poincare::Expression::k_maxNumberOfVariables], Poincare::Expression constants[k_maxNumberOfEquations], Poincare::Context * context);
   Error oneDimensialPolynomialSolve(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression polynomialCoefficients[Poincare::Expression::k_maxNumberOfPolynomialCoefficients], int degree, Poincare::Context * context);

From 3c3ddec0dbf5153e8b3699a7ee2124528e83cc8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 26 Feb 2019 11:45:38 +0100
Subject: [PATCH 114/295] [sequence] Make Sequence inherit from StorageFunction

---
 apps/sequence/sequence.cpp | 321 ++++++++++++++++---------------------
 apps/sequence/sequence.h   | 145 ++++++++++++-----
 2 files changed, 249 insertions(+), 217 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index e108f1b25..0cb52c3a9 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -1,6 +1,6 @@
 #include "sequence.h"
-#include "sequence_store.h"
 #include "cache_context.h"
+#include "sequence_store.h"
 #include <poincare/layout_helper.h>
 #include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
@@ -14,72 +14,51 @@ using namespace Poincare;
 
 namespace Sequence {
 
-Sequence::Sequence(const char * text, KDColor color) :
-  Function(text, color),
-  m_type(Type::Explicit),
-  m_firstInitialConditionText(),
-  m_secondInitialConditionText(),
-  m_firstInitialConditionExpression(),
-  m_secondInitialConditionExpression(),
-  m_firstInitialConditionLayout(),
-  m_secondInitialConditionLayout(),
-  m_nameLayout(),
-  m_definitionName(),
-  m_firstInitialConditionName(),
-  m_secondInitialConditionName(),
-  m_initialRank(0)
-{
+void Sequence::tidy() {
+  m_definitionHandle.tidyName();
+  StorageFunction::tidy(); // m_definitionName.tidy()
+  m_firstInitialConditionHandle.tidy();
+  m_firstInitialConditionHandle.tidyName();
+  m_secondInitialConditionHandle.tidy();
+  m_secondInitialConditionHandle.tidyName();
+  m_nameLayout = Layout();
 }
 
-uint32_t Sequence::checksum() {
-  constexpr size_t dataSize = k_dataLengthInBytes/sizeof(char);
-  char data[dataSize] = {};
-  strlcpy(data, text(), dataSize);
-  strlcpy(data+TextField::maxBufferSize(), firstInitialConditionText(), dataSize - TextField::maxBufferSize());
-  strlcpy(data+2*TextField::maxBufferSize(), secondInitialConditionText(), dataSize - 2*TextField::maxBufferSize());
-  int * intAdress = (int *)(&data[3*TextField::maxBufferSize()]);
-  *intAdress = m_initialRank;
-  data[k_dataLengthInBytes-3] = (char)m_type;
-  data[k_dataLengthInBytes-2] = name()!= nullptr ? name()[0] : 0;
-  data[k_dataLengthInBytes-1] = (char)(isActive() ? 1 : 0);
-  return Ion::crc32((uint32_t *)data, k_dataLengthInBytes/sizeof(uint32_t));
+Sequence::Type Sequence::type() const {
+  return recordData()->type();
 }
 
-const char * Sequence::firstInitialConditionText() {
-  return m_firstInitialConditionText;
+int Sequence::initialRank() const {
+  return recordData()->initialRank();
 }
 
-const char * Sequence::secondInitialConditionText() {
-  return m_secondInitialConditionText;
-}
-
-Sequence::Type Sequence::type() {
-  return m_type;
-}
-
-void Sequence::setType(Type type) {
-  if (m_type == Type::Explicit) {
+void Sequence::setType(Type t) {
+  if (t == type()) {
+    return;
+  }
+  if (type() == Type::Explicit) {
     setInitialRank(0);
   }
-  m_type = type;
+  recordData()->setType(t);
   tidy();
   /* Reset all contents */
-  switch (m_type) {
+  switch (t) {
     case Type::Explicit:
       setContent("");
       break;
     case Type::SingleRecurrence:
     {
       char ex[5] = "u(n)";
-      ex[0] = name()[0];
+      ex[0] = fullName()[0];
       setContent(ex);
       break;
     }
     case Type::DoubleRecurrence:
     {
       char ex[12] = "u(n+1)+u(n)";
-      ex[0] = name()[0];
-      ex[7] = name()[0];
+      char name = fullName()[0];
+      ex[0] = name;
+      ex[7] = name;
       setContent(ex);
       break;
     }
@@ -89,146 +68,49 @@ void Sequence::setType(Type type) {
 }
 
 void Sequence::setInitialRank(int rank) {
-  m_initialRank = rank;
-  m_firstInitialConditionName = Layout();
-  m_secondInitialConditionName = Layout();
-}
-
-Poincare::Expression Sequence::firstInitialConditionExpression(Context * context) const {
-  if (m_firstInitialConditionExpression.isUninitialized()) {
-    m_firstInitialConditionExpression = PoincareHelpers::ParseAndSimplify(m_firstInitialConditionText, *context);
-  }
-  return m_firstInitialConditionExpression;
-}
-
-Poincare::Expression Sequence::secondInitialConditionExpression(Context * context) const {
-  if (m_secondInitialConditionExpression.isUninitialized()) {
-    m_secondInitialConditionExpression = PoincareHelpers::ParseAndSimplify(m_secondInitialConditionText, *context);
-  }
-  return m_secondInitialConditionExpression;
-}
-
-Poincare::Layout Sequence::firstInitialConditionLayout() {
-  if (m_firstInitialConditionLayout.isUninitialized()) {
-    Expression nonSimplifedExpression = Expression::Parse(m_firstInitialConditionText);
-    if (!nonSimplifedExpression.isUninitialized()) {
-      m_firstInitialConditionLayout = PoincareHelpers::CreateLayout(nonSimplifedExpression);
-    }
-  }
-  return m_firstInitialConditionLayout;
-}
-
-Poincare::Layout Sequence::secondInitialConditionLayout() {
-  if (m_secondInitialConditionLayout.isUninitialized()) {
-    Expression nonSimplifedExpression = Expression::Parse(m_secondInitialConditionText);
-    if (!nonSimplifedExpression.isUninitialized()) {
-      m_secondInitialConditionLayout = PoincareHelpers::CreateLayout(nonSimplifedExpression);
-    }
-  }
-  return m_secondInitialConditionLayout;
-}
-
-void Sequence::setFirstInitialConditionContent(const char * c) {
-  strlcpy(m_firstInitialConditionText, c, sizeof(m_firstInitialConditionText));
-  m_firstInitialConditionExpression = Expression();
-  m_firstInitialConditionLayout = Layout();
-}
-
-void Sequence::setSecondInitialConditionContent(const char * c) {
-  strlcpy(m_secondInitialConditionText, c, sizeof(m_secondInitialConditionText));
-  m_secondInitialConditionExpression = Expression();
-  m_secondInitialConditionLayout = Layout();
-}
-
-int Sequence::numberOfElements() {
-  return (int)m_type + 1;
+  recordData()->setInitialRank(rank);
+  m_firstInitialConditionHandle.tidyName();
+  m_secondInitialConditionHandle.tidyName();
 }
 
 Poincare::Layout Sequence::nameLayout() {
   if (m_nameLayout.isUninitialized()) {
     m_nameLayout = HorizontalLayout::Builder(
-        CodePointLayout::Builder(name()[0], KDFont::SmallFont),
-        VerticalOffsetLayout::Builder(CodePointLayout::Builder('n', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
+        CodePointLayout::Builder(fullName()[0], KDFont::SmallFont),
+        VerticalOffsetLayout::Builder(CodePointLayout::Builder(symbol(), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
   }
   return m_nameLayout;
 }
 
-Poincare::Layout Sequence::definitionName() {
-  if (m_definitionName.isUninitialized()) {
-    if (m_type == Type::Explicit) {
-      m_definitionName = HorizontalLayout::Builder(
-          CodePointLayout::Builder(name()[0], k_layoutFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String("n", 1, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
-    } else if (m_type == Type::SingleRecurrence) {
-      m_definitionName = HorizontalLayout::Builder(
-          CodePointLayout::Builder(name()[0], k_layoutFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String("n+1", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
-    } else {
-      assert(m_type == Type::DoubleRecurrence);
-      m_definitionName = HorizontalLayout::Builder(
-          CodePointLayout::Builder(name()[0], k_layoutFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String("n+2", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
-    }
-  }
-  return m_definitionName;
-}
-
-Poincare::Layout Sequence::firstInitialConditionName() {
-  char buffer[k_initialRankNumberOfDigits+1];
-  Integer(m_initialRank).serialize(buffer, k_initialRankNumberOfDigits+1);
-  if (m_firstInitialConditionName.isUninitialized()
-      && (m_type == Type::SingleRecurrence
-       || m_type == Type::DoubleRecurrence))
-  {
-    Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
-    m_firstInitialConditionName = HorizontalLayout::Builder(
-        CodePointLayout::Builder(name()[0], k_layoutFont),
-        VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
-  }
-  return m_firstInitialConditionName;
-}
-
-Poincare::Layout Sequence::secondInitialConditionName() {
-  char buffer[k_initialRankNumberOfDigits+1];
-  Integer(m_initialRank+1).serialize(buffer, k_initialRankNumberOfDigits+1);
-  if (m_secondInitialConditionName.isUninitialized()) {
-    if (m_type == Type::DoubleRecurrence) {
-      Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
-      m_secondInitialConditionName = HorizontalLayout::Builder(
-        CodePointLayout::Builder(name()[0], k_layoutFont),
-        VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
-    }
-  }
-  return m_secondInitialConditionName;
-}
-
 bool Sequence::isDefined() {
-  switch (m_type) {
+  SequenceRecordData * data = recordData();
+  switch (type()) {
     case Type::Explicit:
-      return strlen(text()) != 0;
+      return StorageFunction::isDefined();
     case Type::SingleRecurrence:
-      return strlen(text()) != 0 && strlen(firstInitialConditionText()) != 0;
+      return StorageFunction::isDefined() && data->firstInitialConditionSize() > 0;
     default:
-      return strlen(text()) != 0 && strlen(firstInitialConditionText()) != 0 && strlen(secondInitialConditionText()) != 0;
+      return StorageFunction::isDefined() && data->firstInitialConditionSize() > 0 && data->secondInitialConditionSize() > 0;
   }
 }
 
 bool Sequence::isEmpty() {
-  switch (m_type) {
+  SequenceRecordData * data = recordData();
+  switch (type()) {
     case Type::Explicit:
-      return Function::isEmpty();
+      return StorageFunction::isEmpty();
     case Type::SingleRecurrence:
-      return Function::isEmpty() && strlen(m_firstInitialConditionText) == 0;
+      return StorageFunction::isEmpty() && data->firstInitialConditionSize() == 0;
     default:
-      return Function::isEmpty() && strlen(m_firstInitialConditionText) == 0 && strlen(m_secondInitialConditionText) == 0;
+      return StorageFunction::isEmpty() && data->firstInitialConditionSize() == 0 && data->secondInitialConditionSize() == 0;
   }
 }
 
 template<typename T>
 T Sequence::templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const {
   T n = std::round(x);
-  int sequenceIndex = name()[0] == SequenceStore::k_sequenceNames[0][0] ? 0 : 1;
+  int sequenceIndex = fullName()[0] == SequenceStore::k_sequenceNames[0][0] ? 0 : 1;
   if (sqctx->iterateUntilRank<T>(n)) {
     return sqctx->valueOfSequenceAtPreviousRank<T>(sequenceIndex, 0);
   }
@@ -237,9 +119,10 @@ T Sequence::templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const {
 
 template<typename T>
 T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
-  if (n < m_initialRank || n < 0) {
+  if (n < initialRank() || n < 0) {
     return NAN;
   }
+  char symb[] = {symbol(), 0};
   CacheContext<T> ctx = CacheContext<T>(sqctx);
   T un = sqctx->valueOfSequenceAtPreviousRank<T>(0, 0);
   T unm1 = sqctx->valueOfSequenceAtPreviousRank<T>(0, 1);
@@ -251,37 +134,37 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
   Poincare::Symbol vn1Symbol = Symbol::Builder("v(n+1)", 6);
   Poincare::Symbol unSymbol = Symbol::Builder("u(n)", 4);
   Poincare::Symbol un1Symbol = Symbol::Builder("u(n+1)", 6);
-  switch (m_type) {
+  switch (type()) {
     case Type::Explicit:
     {
       ctx.setValueForSymbol(un, unSymbol);
       ctx.setValueForSymbol(vn, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expression(sqctx), symbol(), (T)n, ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)n, ctx);
     }
     case Type::SingleRecurrence:
     {
-      if (n == m_initialRank) {
-        return PoincareHelpers::ApproximateToScalar<T>(firstInitialConditionExpression(sqctx), *sqctx);
+      if (n == initialRank()) {
+        return PoincareHelpers::ApproximateToScalar<T>(firstInitialConditionExpressionReduced(sqctx), *sqctx);
       }
       ctx.setValueForSymbol(un, un1Symbol);
       ctx.setValueForSymbol(unm1, unSymbol);
       ctx.setValueForSymbol(vn, vn1Symbol);
       ctx.setValueForSymbol(vnm1, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expression(sqctx), symbol(), (T)(n-1), ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)(n-1), ctx);
     }
     default:
     {
-      if (n == m_initialRank) {
-        return PoincareHelpers::ApproximateToScalar<T>(firstInitialConditionExpression(sqctx), *sqctx);
+      if (n == initialRank()) {
+        return PoincareHelpers::ApproximateToScalar<T>(firstInitialConditionExpressionReduced(sqctx), *sqctx);
       }
-      if (n == m_initialRank+1) {
-        return PoincareHelpers::ApproximateToScalar<T>(secondInitialConditionExpression(sqctx), *sqctx);
+      if (n == initialRank()+1) {
+        return PoincareHelpers::ApproximateToScalar<T>(secondInitialConditionExpressionReduced(sqctx), *sqctx);
       }
       ctx.setValueForSymbol(unm1, un1Symbol);
       ctx.setValueForSymbol(unm2, unSymbol);
       ctx.setValueForSymbol(vnm1, vn1Symbol);
       ctx.setValueForSymbol(vnm2, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expression(sqctx), symbol(), (T)(n-2), ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)(n-2), ctx);
     }
   }
 }
@@ -302,20 +185,100 @@ double Sequence::sumBetweenBounds(double start, double end, Context * context) c
   return result;
 }
 
-void Sequence::tidy() {
-  Function::tidy();
-  m_firstInitialConditionLayout = Layout();
-  m_secondInitialConditionLayout = Layout();
-  m_firstInitialConditionExpression = Expression();
-  m_secondInitialConditionExpression = Expression();
-  m_nameLayout = Layout();
-  m_definitionName = Layout();
-  m_firstInitialConditionName = Layout();
-  m_secondInitialConditionName = Layout();
+Sequence::SequenceRecordData * Sequence::recordData() const {
+  assert(!isNull());
+  Ion::Storage::Record::Data d = value();
+  return reinterpret_cast<SequenceRecordData *>(const_cast<void *>(d.buffer));
+}
+
+/* Sequence Handle */
+
+Poincare::Layout Sequence::SequenceHandle::name(Sequence * sequence) {
+  if (m_name.isUninitialized()) {
+    buildName(sequence);
+  }
+  return m_name;
+}
+
+/* Definition Handle*/
+
+void * Sequence::DefinitionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+  return (char *)record->value().buffer+sizeof(SequenceRecordData);
+}
+
+size_t Sequence::DefinitionHandle::expressionSize(const Ion::Storage::Record * record) const {
+  Ion::Storage::Record::Data data = record->value();
+  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  return data.size-sizeof(SequenceRecordData) - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
+}
+
+void Sequence::DefinitionHandle::buildName(Sequence * sequence) {
+  char name = sequence->fullName()[0];
+  if (sequence->type() == Type::Explicit) {
+    m_name = HorizontalLayout::Builder(
+        CodePointLayout::Builder(name, k_layoutFont),
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n", 1, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+  } else if (sequence->type() == Type::SingleRecurrence) {
+    m_name = HorizontalLayout::Builder(
+        CodePointLayout::Builder(name, k_layoutFont),
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n+1", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+  } else {
+    assert(sequence->type() == Type::DoubleRecurrence);
+    m_name = HorizontalLayout::Builder(
+        CodePointLayout::Builder(name, k_layoutFont),
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n+2", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+  }
+}
+
+/* First Initial Condition Handle*/
+
+void * Sequence::FirstInitialConditionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+  Ion::Storage::Record::Data data = record->value();
+  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  size_t offset = data.size - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
+  return (char *)data.buffer+offset;
+}
+
+size_t Sequence::FirstInitialConditionHandle::expressionSize(const Ion::Storage::Record * record) const {
+  return static_cast<const Sequence *>(record)->recordData()->firstInitialConditionSize();
+}
+
+void Sequence::FirstInitialConditionHandle::buildName(Sequence * sequence) {
+  assert(sequence->type() == Type::SingleRecurrence || sequence->type() == Type::DoubleRecurrence);
+  char buffer[k_initialRankNumberOfDigits+1];
+  Integer(sequence->initialRank()).serialize(buffer, k_initialRankNumberOfDigits+1);
+  Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
+  m_name = HorizontalLayout::Builder(
+      CodePointLayout::Builder(sequence->fullName()[0], k_layoutFont),
+      VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
+}
+
+/* Second Initial Condition Handle*/
+
+void * Sequence::SecondInitialConditionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+  Ion::Storage::Record::Data data = record->value();
+  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  size_t offset = data.size - dataBuffer->secondInitialConditionSize();
+  return (char *)data.buffer+offset;
+}
+
+size_t Sequence::SecondInitialConditionHandle::expressionSize(const Ion::Storage::Record * record) const {
+  return static_cast<const Sequence *>(record)->recordData()->secondInitialConditionSize();
+}
+
+void Sequence::SecondInitialConditionHandle::buildName(Sequence * sequence) {
+  assert(sequence->type() == Type::DoubleRecurrence);
+  char buffer[k_initialRankNumberOfDigits+1];
+  Integer(sequence->initialRank()+1).serialize(buffer, k_initialRankNumberOfDigits+1);
+  Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
+  m_name = HorizontalLayout::Builder(
+      CodePointLayout::Builder(sequence->fullName()[0], k_layoutFont),
+      VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
 }
 
 template double Sequence::templatedApproximateAtAbscissa<double>(double, SequenceContext*) const;
 template float Sequence::templatedApproximateAtAbscissa<float>(float, SequenceContext*) const;
 template double Sequence::approximateToNextRank<double>(int, SequenceContext*) const;
 template float Sequence::approximateToNextRank<float>(int, SequenceContext*) const;
+
 }
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index bd9deb493..e195b2fae 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -1,45 +1,62 @@
 #ifndef SEQUENCE_SEQUENCE_H
 #define SEQUENCE_SEQUENCE_H
 
-#include "../shared/function.h"
+#include "../shared/storage_function.h"
 #include "sequence_context.h"
 #include <assert.h>
 
 namespace Sequence {
 
-class Sequence : public Shared::Function {
+/* WARNING: after calling setType, setInitialRank, setContent, setFirstInitialConditionContent
+ * or setSecondInitialConditionContent, the sequence context needs to
+ * invalidate the cache because the sequences evaluations might have changed. */
+
+class Sequence : public Shared::StorageFunction {
+friend class SequenceStore;
 public:
+  static constexpr char extension[] = "seq"; // TODO: store this elsewhere?
+
+
   enum class Type {
     Explicit = 0,
     SingleRecurrence = 1,
     DoubleRecurrence = 2
   };
-  Sequence(const char * text = nullptr, KDColor color = KDColorBlack);
-  uint32_t checksum() override;
-  Type type();
-  int initialRank() const {
-    return m_initialRank;
-  }
-  const char * firstInitialConditionText();
-  const char * secondInitialConditionText();
-  Poincare::Expression firstInitialConditionExpression(Poincare::Context * context) const;
-  Poincare::Expression secondInitialConditionExpression(Poincare::Context * context) const;
-  Poincare::Layout firstInitialConditionLayout();
-  Poincare::Layout secondInitialConditionLayout();
-  /* WARNING: after calling setType, setContent, setFirstInitialConditionContent
-   * or setSecondInitialConditionContent, the sequence context needs to
-   * invalidate the cache because the sequences evaluations might have changed. */
+  Sequence(Ion::Storage::Record record = Record()) :
+    StorageFunction(record),
+    m_nameLayout() {}
+  static char Symbol() { return 'n'; }
+  char symbol() const override { return Symbol(); }
+  void tidy() override;
+  // MetaData getters
+  Type type() const;
+  int initialRank() const;
+  // MetaData setters
   void setType(Type type);
   void setInitialRank(int rank);
-  void setFirstInitialConditionContent(const char * c);
-  void setSecondInitialConditionContent(const char * c);
-  int numberOfElements();
+  // Definition
+  Poincare::Layout definitionName() { return m_definitionHandle.name(this); }
+  // First initial condition
+  Poincare::Layout firstInitialConditionName() { return m_firstInitialConditionHandle.name(this); }
+  void firstInitialConditionText(char * buffer, size_t bufferSize) const { return m_firstInitialConditionHandle.text(this, buffer, bufferSize); }
+  Poincare::Expression firstInitialConditionExpressionReduced(Poincare::Context * context) const { return m_firstInitialConditionHandle.expressionReduced(this, context); }
+  Poincare::Expression firstInitialConditionExpressionClone() const { return m_firstInitialConditionHandle.expressionClone(this); }
+  Poincare::Layout firstInitialConditionLayout() { return m_firstInitialConditionHandle.layout(this); }
+  Ion::Storage::Record::ErrorStatus setFirstInitialConditionContent(const char * c) { return m_firstInitialConditionHandle.setContent(this, c); }
+  // Second initial condition
+  Poincare::Layout secondInitialConditionName() { return m_secondInitialConditionHandle.name(this); }
+  void secondInitialConditionText(char * buffer, size_t bufferSize) const { return m_secondInitialConditionHandle.text(this, buffer, bufferSize); }
+  Poincare::Expression secondInitialConditionExpressionReduced(Poincare::Context * context) const { return m_secondInitialConditionHandle.expressionReduced(this, context); }
+  Poincare::Expression secondInitialConditionExpressionClone() const { return m_secondInitialConditionHandle.expressionClone(this); }
+  Poincare::Layout secondInitialConditionLayout() { return m_secondInitialConditionHandle.layout(this); }
+  Ion::Storage::Record::ErrorStatus setSecondInitialConditionContent(const char * c) { return m_secondInitialConditionHandle.setContent(this, c); }
+
+  // Sequence properties
+  int numberOfElements() { return (int)type() + 1; }
   Poincare::Layout nameLayout();
-  Poincare::Layout definitionName();
-  Poincare::Layout firstInitialConditionName();
-  Poincare::Layout secondInitialConditionName();
   bool isDefined() override;
   bool isEmpty() override;
+  // Approximation
   float evaluateAtAbscissa(float x, Poincare::Context * context) const override {
     return templatedApproximateAtAbscissa(x, static_cast<SequenceContext *>(context));
   }
@@ -47,28 +64,80 @@ public:
     return templatedApproximateAtAbscissa(x, static_cast<SequenceContext *>(context));
   }
   template<typename T> T approximateToNextRank(int n, SequenceContext * sqctx) const;
+  // Integral
   double sumBetweenBounds(double start, double end, Poincare::Context * context) const override;
-  void tidy() override;
+
   constexpr static int k_initialRankNumberOfDigits = 3; // m_initialRank is capped by 999
 private:
   constexpr static const KDFont * k_layoutFont = KDFont::LargeFont;
   constexpr static double k_maxNumberOfTermsInSum = 100000.0;
-  constexpr static size_t k_dataLengthInBytes = (3*TextField::maxBufferSize()+3)*sizeof(char)+sizeof(int)+1;
-  static_assert((k_dataLengthInBytes & 0x3) == 0, "The sequence data size is not a multiple of 4 bytes (cannot compute crc)"); // Assert that dataLengthInBytes is a multiple of 4
-  const char * symbol() const override { return "n"; }
+
+  class SequenceRecordData : public FunctionRecordData {
+  public:
+    SequenceRecordData(KDColor color) :
+      FunctionRecordData(color),
+      m_type(Type::Explicit),
+      m_initialRank(0),
+      m_firstInitialConditionSize(0),
+      m_secondInitialConditionSize(0)
+    {}
+    Type type() const { return m_type; }
+    void setType(Type type) { m_type = type; }
+    int initialRank() const { return m_initialRank; }
+    void setInitialRank(int initialRank) { m_initialRank = initialRank; }
+    size_t firstInitialConditionSize() const { return m_firstInitialConditionSize; }
+    void setFirstInitialConditionSize(size_t firstInitialConditionSize) { m_firstInitialConditionSize = firstInitialConditionSize; }
+    size_t secondInitialConditionSize() const { return m_secondInitialConditionSize; }
+    void setSecondInitialConditionSize(size_t secondInitialConditionSize) { m_secondInitialConditionSize = secondInitialConditionSize; }
+  private:
+    Type m_type;
+    int m_initialRank;
+    size_t m_firstInitialConditionSize;
+    size_t m_secondInitialConditionSize;
+  };
+
+  class SequenceHandle : public Shared::ExpressionModelHandle {
+  public:
+    SequenceHandle() : Shared::ExpressionModelHandle(), m_name() {}
+    void tidyName() { m_name = Poincare::Layout(); }
+    virtual Poincare::Layout name(Sequence * sequence);
+  protected:
+    virtual void buildName(Sequence * sequence) = 0;
+    Poincare::Layout m_name;
+  };
+
+  class DefinitionHandle : public SequenceHandle {
+  public:
+    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  private:
+    size_t expressionSize(const Ion::Storage::Record * record) const override;
+    void buildName(Sequence * sequence) override;
+  };
+
+  class FirstInitialConditionHandle : public SequenceHandle {
+  public:
+    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  private:
+    size_t expressionSize(const Ion::Storage::Record * record) const override;
+    void buildName(Sequence * sequence) override;
+  };
+
+  class SecondInitialConditionHandle : public SequenceHandle {
+  public:
+    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  private:
+    size_t expressionSize(const Ion::Storage::Record * record) const override;
+    void buildName(Sequence * sequence) override;
+  };
+
   template<typename T> T templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const;
-  Type m_type;
-  char m_firstInitialConditionText[TextField::maxBufferSize()];
-  char m_secondInitialConditionText[TextField::maxBufferSize()];
-  mutable Poincare::Expression m_firstInitialConditionExpression;
-  mutable Poincare::Expression m_secondInitialConditionExpression;
-  Poincare::Layout m_firstInitialConditionLayout;
-  Poincare::Layout m_secondInitialConditionLayout;
+  size_t metaDataSize() const override { return sizeof(SequenceRecordData); }
+  const Shared::ExpressionModelHandle * handle() const override { return &m_definitionHandle; }
+  SequenceRecordData * recordData() const;
+  DefinitionHandle m_definitionHandle;
+  FirstInitialConditionHandle m_firstInitialConditionHandle;
+  SecondInitialConditionHandle m_secondInitialConditionHandle;
   Poincare::Layout m_nameLayout;
-  Poincare::Layout m_definitionName;
-  Poincare::Layout m_firstInitialConditionName;
-  Poincare::Layout m_secondInitialConditionName;
-  int m_initialRank;
 };
 
 }

From 4a56e8c127e102ccb9613d907ec38bf202f7d582 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 26 Feb 2019 11:46:12 +0100
Subject: [PATCH 115/295] [sequence] Make SequenceStore inherit from
 StorageFunctionStore

---
 apps/sequence/sequence_store.cpp | 48 +++++++++++++++-----------------
 apps/sequence/sequence_store.h   | 32 ++++++++++-----------
 2 files changed, 36 insertions(+), 44 deletions(-)

diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 4c1e37382..157d9cf19 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -9,37 +9,33 @@ namespace Sequence {
 
 constexpr const char * SequenceStore::k_sequenceNames[MaxNumberOfSequences];
 
-uint32_t SequenceStore::storeChecksum() {
-  assert((MaxNumberOfSequences*sizeof(uint32_t) & 0x3) == 0); // Assert that dataLengthInBytes is a multiple of 4
-  uint32_t checksums[MaxNumberOfSequences];
-  for (int i = 0; i < MaxNumberOfSequences; i++) {
-    checksums[i] = m_sequences[i].checksum();
+Ion::Storage::Record::ErrorStatus SequenceStore::addEmptyModel() {
+  // Choose available name
+  const char * name;
+  int currentNameIndex = 0;
+  while (currentNameIndex < MaxNumberOfSequences) {
+    name = k_sequenceNames[currentNameIndex];
+    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Sequence::extension).isNull()) {
+      break;
+    }
+    currentNameIndex++;
   }
-  constexpr int checksumsStoreStorageSize = 2;
-  uint32_t checksumsStoreStorage[checksumsStoreStorageSize];
-  checksumsStoreStorage[0] = Ion::crc32((uint32_t *)checksums, MaxNumberOfSequences);
-  checksumsStoreStorage[1] = Ion::Storage::sharedStorage()->checksum();
-  return Ion::crc32((uint32_t *)checksumsStoreStorage, checksumsStoreStorageSize);
+  assert(currentNameIndex < MaxNumberOfSequences);
+  // Choose the corresponding color
+  KDColor color = Palette::DataColor[currentNameIndex];
+  Sequence::SequenceRecordData data(color);
+  // m_sequences
+  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, Sequence::extension, &data, sizeof(data));
 }
 
-char SequenceStore::symbol() const {
-  return 'n';
+void SequenceStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
+  m_sequences[cacheIndex] = Sequence(record);
 }
 
-Sequence * SequenceStore::emptyModel() {
-  static Sequence addedSequence("", KDColorBlack);
-  addedSequence = Sequence(firstAvailableName(), firstAvailableColor());
-  return &addedSequence;
-}
-
-Sequence * SequenceStore::nullModel() {
-  static Sequence emptyFunction("", KDColorBlack);
-  return &emptyFunction;
-}
-
-void SequenceStore::setModelAtIndex(Shared::ExpressionModel * f, int i) {
-  assert(i>=0 && i<m_numberOfModels);
-  m_sequences[i] = *(static_cast<Sequence *>(f));
+Shared::SingleExpressionModelHandle * SequenceStore::memoizedModelAtIndex(int cacheIndex) const {
+  assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
+  return &m_sequences[cacheIndex];
 }
 
 }
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 97a5b6d0c..ce952f4fe 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -1,39 +1,35 @@
 #ifndef SEQUENCE_SEQUENCE_STORE_H
 #define SEQUENCE_SEQUENCE_STORE_H
 
-#include "../shared/function_store.h"
+#include "../shared/storage_function_store.h"
 #include "sequence.h"
 #include <stdint.h>
 #include <escher.h>
 
 namespace Sequence {
 
-class SequenceStore : public Shared::FunctionStore {
+class SequenceStore : public Shared::StorageFunctionStore {
 public:
-  using Shared::FunctionStore::FunctionStore;
-  uint32_t storeChecksum() override;
-  Sequence * modelAtIndex(int i) override {
-    assert(i>=0 && i<m_numberOfModels);
-    return &m_sequences[i];
-  }
-  Sequence * activeFunctionAtIndex(int i) override { return (Sequence *)Shared::FunctionStore::activeFunctionAtIndex(i); }
-  Sequence * definedFunctionAtIndex(int i) override { return (Sequence *)Shared::FunctionStore::definedFunctionAtIndex(i); }
+  using Shared::StorageFunctionStore::StorageFunctionStore;
+  char symbol() const override { return Sequence::Symbol(); }
+  Shared::ExpiringPointer<Sequence> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Sequence>(static_cast<Sequence *>(privateModelForRecord(record))); }
   /* WARNING: after calling removeModel or removeAll, the sequence context
    * need to invalidate its cache as the sequences evaluations might have
    * changed */
   int maxNumberOfModels() const override { return MaxNumberOfSequences; }
-  char symbol() const override;
+
   static constexpr const char * k_sequenceNames[MaxNumberOfSequences] = {
     "u", "v"//, "w"
   };
-  const char * firstAvailableName() override {
-    return firstAvailableAttribute(k_sequenceNames, FunctionStore::name);
-  }
+
 private:
-  Sequence * emptyModel() override;
-  Sequence * nullModel() override;
-  void setModelAtIndex(Shared::ExpressionModel * f, int i) override;
-  Sequence m_sequences[MaxNumberOfSequences];
+  const char * modelExtension() const override { return Sequence::extension; }
+  Ion::Storage::Record::ErrorStatus addEmptyModel() override;
+  /* We don't really use model memoization as the number of Sequence is limited
+   * and we keep enough Sequences to store them all. */
+  void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
+  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  mutable Sequence m_sequences[MaxNumberOfSequences];
 };
 
 }

From 7fdc8a7c1b8b4e551eed053895d796ec92c5f3d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 28 Feb 2019 14:47:37 +0100
Subject: [PATCH 116/295] [shared] Factorize 'storageDidChangeForRecord' in
 StorageFunctionApp

---
 apps/graph/app.cpp                   | 10 ----------
 apps/graph/app.h                     |  6 ++----
 apps/shared/storage_function_app.cpp |  4 ++++
 apps/shared/storage_function_app.h   |  4 +++-
 4 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/apps/graph/app.cpp b/apps/graph/app.cpp
index c150b7f97..9b873e3a8 100644
--- a/apps/graph/app.cpp
+++ b/apps/graph/app.cpp
@@ -31,16 +31,6 @@ App * App::Snapshot::unpack(Container * container) {
   return new (container->currentAppBuffer()) App(container, this);
 }
 
-void App::Snapshot::reset() {
-  StorageFunctionApp::Snapshot::reset();
-  *(modelVersion()) = 0;
-  *(rangeVersion()) = 0;
-}
-
-void App::Snapshot::storageDidChangeForRecord(const Ion::Storage::Record record) {
-  m_functionStore.storageDidChangeForRecord(record);
-}
-
 App::Descriptor * App::Snapshot::descriptor() {
   static Descriptor descriptor;
   return &descriptor;
diff --git a/apps/graph/app.h b/apps/graph/app.h
index 0d3dc79ad..a38715e72 100644
--- a/apps/graph/app.h
+++ b/apps/graph/app.h
@@ -22,10 +22,8 @@ public:
   public:
     Snapshot();
     App * unpack(Container * container) override;
-    void reset() override;
-    void storageDidChangeForRecord(const Ion::Storage::Record record) override;
     Descriptor * descriptor() override;
-    StorageCartesianFunctionStore * functionStore();
+    StorageCartesianFunctionStore * functionStore() override;
     Shared::InteractiveCurveViewRange * graphRange();
   private:
     void tidy() override;
@@ -35,7 +33,7 @@ public:
   InputViewController * inputViewController() override;
   char XNT() override;
   NestedMenuController * variableBoxForInputEventHandler(InputEventHandler * textInput) override;
-  StorageCartesianFunctionStore * functionStore() override { return static_cast<Snapshot *>(snapshot())->functionStore(); }
+  StorageCartesianFunctionStore * functionStore() override { return static_cast<StorageCartesianFunctionStore *>(Shared::StorageFunctionApp::functionStore()); }
 private:
   App(Container * container, Snapshot * snapshot);
   StorageListController m_listController;
diff --git a/apps/shared/storage_function_app.cpp b/apps/shared/storage_function_app.cpp
index 0395b9f6c..c4dcc295e 100644
--- a/apps/shared/storage_function_app.cpp
+++ b/apps/shared/storage_function_app.cpp
@@ -28,6 +28,10 @@ void StorageFunctionApp::Snapshot::reset() {
   setActiveTab(0);
 }
 
+void StorageFunctionApp::Snapshot::storageDidChangeForRecord(const Ion::Storage::Record record) {
+  functionStore()->storageDidChangeForRecord(record);
+}
+
 void StorageFunctionApp::willBecomeInactive() {
   if (m_modalViewController.isDisplayingModal()) {
     m_modalViewController.dismissModalViewController();
diff --git a/apps/shared/storage_function_app.h b/apps/shared/storage_function_app.h
index cf8efdc02..23e089e28 100644
--- a/apps/shared/storage_function_app.h
+++ b/apps/shared/storage_function_app.h
@@ -19,9 +19,11 @@ public:
     uint32_t * modelVersion() { return &m_modelVersion; }
     uint32_t * rangeVersion() { return &m_rangeVersion; }
     Poincare::Preferences::AngleUnit * angleUnitVersion() { return &m_angleUnitVersion; }
+    virtual StorageFunctionStore * functionStore() = 0;
     Interval * interval() { return &m_interval; }
     int * indexFunctionSelectedByCursor() { return &m_indexFunctionSelectedByCursor; }
     void reset() override;
+    void storageDidChangeForRecord(const Ion::Storage::Record record) override;
   protected:
     CurveViewCursor m_cursor;
     Interval m_interval;
@@ -32,7 +34,7 @@ public:
     Poincare::Preferences::AngleUnit m_angleUnitVersion;
  };
   virtual ~StorageFunctionApp() = default;
-  virtual StorageFunctionStore * functionStore() = 0;
+  virtual StorageFunctionStore * functionStore() { return static_cast<StorageFunctionApp::Snapshot *>(snapshot())->functionStore(); }
   virtual InputViewController * inputViewController() = 0;
   void willBecomeInactive() override;
 

From 44a5d02ddf26399f2c59594f7278d276ba38b8e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 28 Feb 2019 14:48:45 +0100
Subject: [PATCH 117/295] [shared][graph] Factorize ListController baseline
 computation in StorageFunctionListController

---
 apps/graph/list/storage_list_controller.cpp      | 10 ----------
 apps/graph/list/storage_list_controller.h        |  1 -
 apps/shared/storage_function_list_controller.cpp | 11 +++++++++++
 apps/shared/storage_function_list_controller.h   |  2 +-
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/apps/graph/list/storage_list_controller.cpp b/apps/graph/list/storage_list_controller.cpp
index aee95cac7..da9f23889 100644
--- a/apps/graph/list/storage_list_controller.cpp
+++ b/apps/graph/list/storage_list_controller.cpp
@@ -189,14 +189,4 @@ void StorageListController::setFunctionNameInTextField(ExpiringPointer<StorageFu
   textField->setText(bufferName);
 }
 
-KDCoordinate StorageListController::privateBaseline(int j) const {
-  assert(j >= 0 && j < const_cast<StorageListController *>(this)->modelStore()->numberOfModels());
-  Shared::FunctionExpressionCell * cell = static_cast<Shared::FunctionExpressionCell *>((const_cast<SelectableTableView *>(&m_selectableTableView))->cellAtLocation(1, j));
-  Poincare::Layout layout = cell->layout();
-  if (layout.isUninitialized()) {
-    return -1;
-  }
-  return 0.5*(const_cast<StorageListController *>(this)->rowHeight(j)-layout.layoutSize().height())+layout.baseline();
-}
-
 }
diff --git a/apps/graph/list/storage_list_controller.h b/apps/graph/list/storage_list_controller.h
index a8c65d9fa..eabe0c52f 100644
--- a/apps/graph/list/storage_list_controller.h
+++ b/apps/graph/list/storage_list_controller.h
@@ -33,7 +33,6 @@ private:
     return static_cast<Shared::TextFieldDelegateApp *>(app());
   }
   void setFunctionNameInTextField(Shared::ExpiringPointer<Shared::StorageFunction> function, TextField * textField);
-  KDCoordinate privateBaseline(int j) const override;
   TextFieldFunctionTitleCell m_functionTitleCells[k_maxNumberOfDisplayableRows];
   Shared::FunctionExpressionCell m_expressionCells[k_maxNumberOfDisplayableRows];
   ListParameterController m_parameterController;
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index 31ef84600..d989de397 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -1,5 +1,6 @@
 #include "storage_function_list_controller.h"
 #include "storage_function_app.h"
+#include "function_expression_cell.h"
 
 namespace Shared {
 
@@ -316,4 +317,14 @@ KDCoordinate StorageFunctionListController::nameWidth(int nameLength) const {
   return nameLength * const_cast<StorageFunctionListController *>(this)->titleCells(0)->font()->glyphSize().width();
 }
 
+KDCoordinate StorageFunctionListController::privateBaseline(int j) const {
+  assert(j >= 0 && j < const_cast<StorageFunctionListController *>(this)->modelStore()->numberOfModels());
+  FunctionExpressionCell * cell = static_cast<Shared::FunctionExpressionCell *>((const_cast<SelectableTableView *>(&m_selectableTableView))->cellAtLocation(1, j));
+  Poincare::Layout layout = cell->layout();
+  if (layout.isUninitialized()) {
+    return -1; // Baseline < 0 triggers default behaviour (centered alignment)
+  }
+  return 0.5*(const_cast<StorageFunctionListController *>(this)->rowHeight(j)-layout.layoutSize().height())+layout.baseline();
+}
+
 }
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/storage_function_list_controller.h
index 6a5e92e80..fc9633d69 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/storage_function_list_controller.h
@@ -66,6 +66,7 @@ private:
   InputViewController * inputController() override;
   KDCoordinate maxFunctionNameWidth();
   void didChangeModelsList() override;
+  virtual KDCoordinate privateBaseline(int j) const;
   KDCoordinate notMemoizedCumulatedHeightFromIndex(int j) override {
     return TableViewDataSource::cumulatedHeightFromIndex(j);
   }
@@ -77,7 +78,6 @@ private:
   virtual FunctionTitleCell * titleCells(int index) = 0;
   virtual HighlightCell * expressionCells(int index) = 0;
   virtual void willDisplayTitleCellAtIndex(HighlightCell * cell, int j) = 0;
-  virtual KDCoordinate privateBaseline(int j) const = 0;
   KDCoordinate nameWidth(int nameLength) const;
   EvenOddCell m_emptyCell;
   Button m_plotButton;

From 184d2f08027933d4eeff97d662528a5223cea18b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 28 Feb 2019 14:50:19 +0100
Subject: [PATCH 118/295] [shared] ExpiringPointer: add constructor to enable
 pointer casting

---
 apps/shared/expiring_pointer.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/apps/shared/expiring_pointer.h b/apps/shared/expiring_pointer.h
index 85642ef02..699e47939 100644
--- a/apps/shared/expiring_pointer.h
+++ b/apps/shared/expiring_pointer.h
@@ -7,12 +7,21 @@ namespace Shared {
 
 template <class T>
 class ExpiringPointer {
+  template<typename U>
+  friend class ExpiringPointer;
 public:
   ExpiringPointer(T * rawPointer, bool reinitGlobal = true) : m_rawPointer(rawPointer) {
 #if DEBUG
     s_global = rawPointer;
 #endif
   }
+  template<class U>
+  ExpiringPointer(ExpiringPointer<U> p) : m_rawPointer(static_cast<T *>(p.m_rawPointer)) {
+#if DEBUG
+    s_global = m_rawPointer;
+#endif
+  }
+  bool isNull() { return m_rawPointer == nullptr; }
   T *operator->() {
 #if DEBUG
     assert(m_rawPointer != nullptr && m_rawPointer == s_global);

From 2bc2506b6073ecbc97032647762b53b7ca6a55ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 28 Feb 2019 14:51:22 +0100
Subject: [PATCH 119/295] [apps/sequence] Make controllers inherit from
 StorageFunction controllers when required

---
 apps/sequence/app.cpp                         |  16 +-
 apps/sequence/app.h                           |  13 +-
 .../graph/curve_parameter_controller.cpp      |   2 +-
 .../graph/curve_parameter_controller.h        |   4 +-
 .../graph/go_to_parameter_controller.cpp      |   3 +-
 .../graph/go_to_parameter_controller.h        |   6 +-
 apps/sequence/graph/graph_controller.cpp      |  42 +++--
 apps/sequence/graph/graph_controller.h        |   9 +-
 apps/sequence/graph/graph_view.cpp            |   9 +-
 apps/sequence/graph/graph_view.h              |   4 +-
 apps/sequence/graph/term_sum_controller.cpp   |  16 +-
 apps/sequence/graph/term_sum_controller.h     |   6 +-
 apps/sequence/list/list_controller.cpp        | 166 +++++++++---------
 apps/sequence/list/list_controller.h          |  21 ++-
 .../list/list_parameter_controller.cpp        |  61 +++----
 .../sequence/list/list_parameter_controller.h |  14 +-
 .../list/type_parameter_controller.cpp        |  54 +++---
 .../sequence/list/type_parameter_controller.h |  12 +-
 apps/sequence/sequence.h                      |   3 -
 apps/sequence/sequence_context.cpp            |  19 +-
 apps/sequence/sequence_store.cpp              |  25 ++-
 apps/sequence/sequence_store.h                |   6 +-
 apps/sequence/values/values_controller.cpp    |  19 +-
 apps/sequence/values/values_controller.h      |  11 +-
 apps/shared/global_context.cpp                |   2 +-
 apps/shared/global_context.h                  |   4 +-
 .../storage_function_list_controller.cpp      |   2 +-
 .../storage_list_parameter_controller.h       |   4 +-
 apps/shared/storage_values_controller.h       |   2 +-
 29 files changed, 270 insertions(+), 285 deletions(-)

diff --git a/apps/sequence/app.cpp b/apps/sequence/app.cpp
index c3da93582..93fea6e6e 100644
--- a/apps/sequence/app.cpp
+++ b/apps/sequence/app.cpp
@@ -19,7 +19,7 @@ const Image * App::Descriptor::icon() {
 }
 
 App::Snapshot::Snapshot() :
-  Shared::FunctionApp::Snapshot::Snapshot(),
+  Shared::StorageFunctionApp::Snapshot::Snapshot(),
   m_sequenceStore(),
   m_graphRange(&m_cursor)
 {
@@ -30,19 +30,17 @@ App * App::Snapshot::unpack(Container * container) {
 }
 
 void App::Snapshot::reset() {
-  FunctionApp::Snapshot::reset();
+  StorageFunctionApp::Snapshot::reset();
   /* reset might be called when activating the exam mode from the settings or
    * when a memory exception occurs. In both cases, we do not want to
    * computeYAuto in GraphRange::setDefault, so we need to set its delegate to
    * nullptr. */
   m_graphRange.setDelegate(nullptr);
-  m_graphRange.setDefault();
   /* We do not need to invalidate the sequence context cache here:
    * - The context is not allocated yet when reset is call from the application
    *   settings.
    * - The cache will be destroyed if the reset call comes from a memory
    *   exception. */
-  m_sequenceStore.removeAll();
 }
 
 App::Descriptor * App::Snapshot::descriptor() {
@@ -56,17 +54,17 @@ void App::Snapshot::tidy() {
 }
 
 App::App(Container * container, Snapshot * snapshot) :
-  FunctionApp(container, snapshot, &m_inputViewController),
-  m_sequenceContext(((AppsContainer *)container)->globalContext(), snapshot->sequenceStore()),
-  m_listController(&m_listFooter, this, snapshot->sequenceStore(), &m_listHeader, &m_listFooter),
+  StorageFunctionApp(container, snapshot, &m_inputViewController),
+  m_sequenceContext(((AppsContainer *)container)->globalContext(), snapshot->functionStore()),
+  m_listController(&m_listFooter, this, &m_listHeader, &m_listFooter),
   m_listFooter(&m_listHeader, &m_listController, &m_listController, ButtonRowController::Position::Bottom, ButtonRowController::Style::EmbossedGrey),
   m_listHeader(nullptr, &m_listFooter, &m_listController),
   m_listStackViewController(&m_tabViewController, &m_listHeader),
-  m_graphController(&m_graphAlternateEmptyViewController, this, snapshot->sequenceStore(), snapshot->graphRange(), snapshot->cursor(), snapshot->indexFunctionSelectedByCursor(), snapshot->modelVersion(), snapshot->rangeVersion(), snapshot->angleUnitVersion(), &m_graphHeader),
+  m_graphController(&m_graphAlternateEmptyViewController, this, snapshot->functionStore(), snapshot->graphRange(), snapshot->cursor(), snapshot->indexFunctionSelectedByCursor(), snapshot->modelVersion(), snapshot->rangeVersion(), snapshot->angleUnitVersion(), &m_graphHeader),
   m_graphAlternateEmptyViewController(&m_graphHeader, &m_graphController, &m_graphController),
   m_graphHeader(&m_graphStackViewController, &m_graphAlternateEmptyViewController, &m_graphController),
   m_graphStackViewController(&m_tabViewController, &m_graphHeader),
-  m_valuesController(&m_valuesAlternateEmptyViewController, this, snapshot->sequenceStore(), snapshot->interval(), &m_valuesHeader),
+  m_valuesController(&m_valuesAlternateEmptyViewController, this, snapshot->interval(), &m_valuesHeader),
   m_valuesAlternateEmptyViewController(&m_valuesHeader, &m_valuesController, &m_valuesController),
   m_valuesHeader(nullptr, &m_valuesAlternateEmptyViewController, &m_valuesController),
   m_valuesStackViewController(&m_tabViewController, &m_valuesHeader),
diff --git a/apps/sequence/app.h b/apps/sequence/app.h
index c3f71836c..c63f24f30 100644
--- a/apps/sequence/app.h
+++ b/apps/sequence/app.h
@@ -8,11 +8,11 @@
 #include "graph/curve_view_range.h"
 #include "list/list_controller.h"
 #include "values/values_controller.h"
-#include "../shared/function_app.h"
+#include "../shared/storage_function_app.h"
 
 namespace Sequence {
 
-class App : public Shared::FunctionApp {
+class App : public Shared::StorageFunctionApp {
 public:
   class Descriptor : public ::App::Descriptor {
   public:
@@ -20,13 +20,13 @@ public:
     I18n::Message upperName() override;
     const Image * icon() override;
   };
-  class Snapshot : public Shared::FunctionApp::Snapshot {
+  class Snapshot : public Shared::StorageFunctionApp::Snapshot {
   public:
     Snapshot();
     App * unpack(Container * container) override;
     void reset() override;
     Descriptor * descriptor() override;
-    SequenceStore * sequenceStore() { return &m_sequenceStore; }
+    SequenceStore * functionStore() override { return &m_sequenceStore; }
     CurveViewRange * graphRange() { return &m_graphRange; }
   private:
     void tidy() override;
@@ -34,8 +34,11 @@ public:
     CurveViewRange m_graphRange;
   };
   InputViewController * inputViewController() override;
-  SequenceContext * localContext() override;
+  // TODO: override variableBoxForInputEventHandler to lock sequence in the variable box once they appear there
+  // NestedMenuController * variableBoxForInputEventHandler(InputEventHandler * textInput) override;
   char XNT() override;
+  SequenceContext * localContext() override;
+  SequenceStore * functionStore() override { return static_cast<SequenceStore *>(Shared::StorageFunctionApp::functionStore()); }
 private:
   App(Container * container, Snapshot * snapshot);
   SequenceContext m_sequenceContext;
diff --git a/apps/sequence/graph/curve_parameter_controller.cpp b/apps/sequence/graph/curve_parameter_controller.cpp
index 6521148ec..9ba0be189 100644
--- a/apps/sequence/graph/curve_parameter_controller.cpp
+++ b/apps/sequence/graph/curve_parameter_controller.cpp
@@ -7,7 +7,7 @@ using namespace Shared;
 namespace Sequence {
 
 CurveParameterController::CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, GraphController * graphController, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  FunctionCurveParameterController(graphRange, cursor),
+  StorageFunctionCurveParameterController(graphRange, cursor),
   m_goToParameterController(this, inputEventHandlerDelegate, graphRange, cursor, I18n::Message::N),
   m_sumCell(I18n::Message::TermSum),
   m_graphController(graphController)
diff --git a/apps/sequence/graph/curve_parameter_controller.h b/apps/sequence/graph/curve_parameter_controller.h
index 37e0eb54f..7a5bf923a 100644
--- a/apps/sequence/graph/curve_parameter_controller.h
+++ b/apps/sequence/graph/curve_parameter_controller.h
@@ -2,14 +2,14 @@
 #define SEQUENCE_CURVE_PARAMETER_CONTROLLER_H
 
 #include <escher.h>
-#include "../../shared/function_curve_parameter_controller.h"
+#include "../../shared/storage_function_curve_parameter_controller.h"
 #include "go_to_parameter_controller.h"
 
 namespace Sequence {
 
 class GraphController;
 
-class CurveParameterController : public Shared::FunctionCurveParameterController {
+class CurveParameterController : public Shared::StorageFunctionCurveParameterController {
 public:
   CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, GraphController * graphController, Shared::InteractiveCurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
diff --git a/apps/sequence/graph/go_to_parameter_controller.cpp b/apps/sequence/graph/go_to_parameter_controller.cpp
index 25aa8307c..e373e15fb 100644
--- a/apps/sequence/graph/go_to_parameter_controller.cpp
+++ b/apps/sequence/graph/go_to_parameter_controller.cpp
@@ -1,5 +1,4 @@
 #include "go_to_parameter_controller.h"
-#include "../app.h"
 #include <assert.h>
 #include <cmath>
 
@@ -7,7 +6,7 @@ namespace Sequence {
 
 bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
   assert(parameterIndex == 0);
-  return Shared::FunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::round(f));
+  return Shared::StorageFunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::round(f));
 }
 
 }
diff --git a/apps/sequence/graph/go_to_parameter_controller.h b/apps/sequence/graph/go_to_parameter_controller.h
index adf6dd31b..d7424d184 100644
--- a/apps/sequence/graph/go_to_parameter_controller.h
+++ b/apps/sequence/graph/go_to_parameter_controller.h
@@ -1,13 +1,13 @@
 #ifndef SEQUENCE_GO_TO_PARAMETER_CONTROLLER_H
 #define SEQUENCE_GO_TO_PARAMETER_CONTROLLER_H
 
-#include "../../shared/function_go_to_parameter_controller.h"
+#include "../../shared/storage_function_go_to_parameter_controller.h"
 
 namespace Sequence {
 
-class GoToParameterController : public Shared::FunctionGoToParameterController {
+class GoToParameterController : public Shared::StorageFunctionGoToParameterController {
 public:
-  using Shared::FunctionGoToParameterController::FunctionGoToParameterController;
+  using Shared::StorageFunctionGoToParameterController::StorageFunctionGoToParameterController;
 private:
   bool setParameterAtIndex(int parameterIndex, double f) override;
 };
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 92db25c1a..1ba55c2b7 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -11,19 +11,18 @@ static inline int minInt(int x, int y) { return (x < y ? x : y); }
 static inline int maxInt(int x, int y) { return (x > y ? x : y); }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
-  FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, graphRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
+  StorageFunctionGraphController(parentResponder, inputEventHandlerDelegate, header, graphRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
   m_bannerView(),
   m_view(sequenceStore, graphRange, m_cursor, &m_bannerView, &m_cursorView),
   m_graphRange(graphRange),
   m_curveParameterController(inputEventHandlerDelegate, this, graphRange, m_cursor),
-  m_termSumController(this, inputEventHandlerDelegate, &m_view, graphRange, m_cursor),
-  m_sequenceStore(sequenceStore)
+  m_termSumController(this, inputEventHandlerDelegate, &m_view, graphRange, m_cursor)
 {
   m_graphRange->setDelegate(this);
 }
 
 I18n::Message GraphController::emptyMessage() {
-  if (m_sequenceStore->numberOfDefinedModels() == 0) {
+  if (functionStore()->numberOfDefinedModels() == 0) {
     return I18n::Message::NoSequence;
   }
   return I18n::Message::NoActivatedSequence;
@@ -31,35 +30,34 @@ I18n::Message GraphController::emptyMessage() {
 
 float GraphController::interestingXMin() const {
   int nmin = INT_MAX;
-  for (int i = 0; i < m_sequenceStore->numberOfModels(); i++) {
-    Sequence * s = m_sequenceStore->modelAtIndex(i);
-    if (s->isDefined() && s->isActive()) {
-      nmin = minInt(nmin, s->initialRank());
-    }
+  int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
+  for (int i = 0; i < nbOfActiveModels; i++) {
+    ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    nmin = minInt(nmin, s->initialRank());
   }
   assert(nmin < INT_MAX);
   return nmin;
 }
 
 float GraphController::interestingXHalfRange() const {
-  float standardRange = Shared::FunctionGraphController::interestingXHalfRange();
+  float standardRange = Shared::StorageFunctionGraphController::interestingXHalfRange();
   int nmin = INT_MAX;
   int nmax = 0;
-  for (int i = 0; i < m_sequenceStore->numberOfModels(); i++) {
-    Sequence * s = m_sequenceStore->modelAtIndex(i);
-    if (s->isDefined() && s->isActive()) {
-      int firstInterestingIndex = s->initialRank();
-      nmin = minInt(nmin, firstInterestingIndex);
-      nmax = maxInt(nmax, firstInterestingIndex + standardRange);
-    }
+  int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
+  for (int i = 0; i < nbOfActiveModels; i++) {
+    ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    int firstInterestingIndex = s->initialRank();
+    nmin = minInt(nmin, firstInterestingIndex);
+    nmax = maxInt(nmax, firstInterestingIndex + standardRange);
   }
   assert(nmax - nmin >= standardRange);
   return nmax - nmin;
 }
 
 bool GraphController::handleEnter() {
-  m_termSumController.setFunction(m_sequenceStore->activeFunctionAtIndex(indexFunctionSelectedByCursor()));
-  return FunctionGraphController::handleEnter();
+  Ion::Storage::Record record = functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor());
+  m_termSumController.setRecord(record);
+  return StorageFunctionGraphController::handleEnter();
 }
 
 bool GraphController::moveCursorHorizontally(int direction) {
@@ -77,16 +75,16 @@ bool GraphController::moveCursorHorizontally(int direction) {
   if (x < 0.0) {
     return false;
   }
-  Sequence * s = m_sequenceStore->activeFunctionAtIndex(indexFunctionSelectedByCursor());
+  ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   double y = s->evaluateAtAbscissa(x, myApp->localContext());
   m_cursor->moveTo(x, y);
-  m_graphRange->panToMakePointVisible(x, y, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphRange->panToMakePointVisible(x, y, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
 double GraphController::defaultCursorAbscissa() {
-  return std::round(Shared::FunctionGraphController::defaultCursorAbscissa());
+  return std::round(Shared::StorageFunctionGraphController::defaultCursorAbscissa());
 }
 
 }
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index b8579a776..1cdc56c46 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -6,13 +6,13 @@
 #include "curve_parameter_controller.h"
 #include "curve_view_range.h"
 #include "term_sum_controller.h"
-#include "../../shared/function_graph_controller.h"
+#include "../../shared/storage_function_graph_controller.h"
 #include "../../shared/cursor_view.h"
 #include "../sequence_store.h"
 
 namespace Sequence {
 
-class GraphController final : public Shared::FunctionGraphController {
+class GraphController final : public Shared::StorageFunctionGraphController {
 public:
   GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
@@ -21,14 +21,14 @@ public:
   float interestingXMin() const override;
   float interestingXHalfRange() const override;
 protected:
-  int numberOfCurves() const override { return m_sequenceStore->numberOfModels(); }
+  int numberOfCurves() const override { return functionStore()->numberOfModels(); }
 private:
   BannerView * bannerView() override { return &m_bannerView; }
   bool handleEnter() override;
   bool moveCursorHorizontally(int direction) override;
   double defaultCursorAbscissa() override;
   CurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
-  SequenceStore * functionStore() const override { return m_sequenceStore; }
+  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::StorageFunctionGraphController::functionStore()); }
   GraphView * functionGraphView() override { return &m_view; }
   View * cursorView() override {
     return &m_cursorView;
@@ -40,7 +40,6 @@ private:
   CurveViewRange * m_graphRange;
   CurveParameterController m_curveParameterController;
   TermSumController m_termSumController;
-  SequenceStore * m_sequenceStore;
 };
 
 
diff --git a/apps/sequence/graph/graph_view.cpp b/apps/sequence/graph/graph_view.cpp
index c973b5715..7611adfae 100644
--- a/apps/sequence/graph/graph_view.cpp
+++ b/apps/sequence/graph/graph_view.cpp
@@ -7,15 +7,16 @@ namespace Sequence {
 
 GraphView::GraphView(SequenceStore * sequenceStore, InteractiveCurveViewRange * graphRange,
   CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
-  FunctionGraphView(graphRange, cursor, bannerView, cursorView),
+  StorageFunctionGraphView(graphRange, cursor, bannerView, cursorView),
   m_sequenceStore(sequenceStore)
 {
 }
 
 void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
-  FunctionGraphView::drawRect(ctx, rect);
+  StorageFunctionGraphView::drawRect(ctx, rect);
   for (int i = 0; i < m_sequenceStore->numberOfActiveFunctions(); i++) {
-    Sequence * s = m_sequenceStore->activeFunctionAtIndex(i);
+    Ion::Storage::Record record = m_sequenceStore->activeRecordAtIndex(i);
+    ExpiringPointer<Sequence> s = m_sequenceStore->modelForRecord(record);;
     float rectXMin = pixelToFloat(Axis::Horizontal, rect.left() - k_externRectMargin);
     rectXMin = rectXMin < 0 ? 0 : rectXMin;
     float rectXMax = pixelToFloat(Axis::Horizontal, rect.right() + k_externRectMargin);
@@ -29,7 +30,7 @@ void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
         continue;
       }
       drawDot(ctx, rect, x, y, s->color());
-      if (x >= m_highlightedStart && x <= m_highlightedEnd && s == m_selectedFunction) {
+      if (x >= m_highlightedStart && x <= m_highlightedEnd && record == m_selectedRecord) {
         KDColor color = m_shouldColorHighlighted ? s->color() : KDColorBlack;
         if (y >= 0.0f) {
           drawSegment(ctx, rect, Axis::Vertical, x, 0.0f, y, color, 1);
diff --git a/apps/sequence/graph/graph_view.h b/apps/sequence/graph/graph_view.h
index 97d35ea99..291ddf8fe 100644
--- a/apps/sequence/graph/graph_view.h
+++ b/apps/sequence/graph/graph_view.h
@@ -1,12 +1,12 @@
 #ifndef SEQUENCE_GRAPH_VIEW_H
 #define SEQUENCE_GRAPH_VIEW_H
 
-#include "../../shared/function_graph_view.h"
+#include "../../shared/storage_function_graph_view.h"
 #include "../sequence_store.h"
 
 namespace Sequence {
 
-class GraphView : public Shared::FunctionGraphView {
+class GraphView : public Shared::StorageFunctionGraphView {
 public:
   GraphView(SequenceStore * sequenceStore, Shared::InteractiveCurveViewRange * graphRange,
     Shared::CurveViewCursor * cursor, Shared::BannerView * bannerView, View * cursorView);
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 8f7a99e5f..15a018a93 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -1,6 +1,5 @@
 #include "term_sum_controller.h"
 #include "../../shared/text_field_delegate.h"
-#include "../app.h"
 #include <poincare/code_point_layout.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/vertical_offset_layout.h>
@@ -18,7 +17,7 @@ using namespace Poincare;
 namespace Sequence {
 
 TermSumController::TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
-  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
+  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
 {
 }
 
@@ -30,7 +29,7 @@ bool TermSumController::moveCursorHorizontallyToPosition(double position) {
   if (position < 0.0) {
     return false;
   }
-  return SumGraphController::moveCursorHorizontallyToPosition(std::round(position));
+  return StorageSumGraphController::moveCursorHorizontallyToPosition(std::round(position));
 }
 
 I18n::Message TermSumController::legendMessageAtStep(Step step) {
@@ -49,14 +48,9 @@ double TermSumController::cursorNextStep(double x, int direction) {
   return std::round(m_cursor->x()+delta);
 }
 
-Layout TermSumController::createFunctionLayout(const char * functionName) {
-  return HorizontalLayout::Builder(
-      CodePointLayout::Builder(functionName[0], KDFont::SmallFont),
-        VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('n', KDFont::SmallFont),
-          VerticalOffsetLayoutNode::Type::Subscript
-        )
-      );
+Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) {
+  Shared::ExpiringPointer<Sequence> sequence = static_cast<Shared::ExpiringPointer<Sequence>>(function);
+  return sequence->nameLayout();
 }
 
 }
diff --git a/apps/sequence/graph/term_sum_controller.h b/apps/sequence/graph/term_sum_controller.h
index df3acf423..5d7e4b31b 100644
--- a/apps/sequence/graph/term_sum_controller.h
+++ b/apps/sequence/graph/term_sum_controller.h
@@ -5,11 +5,11 @@
 #include <poincare/layout.h>
 #include "graph_view.h"
 #include "curve_view_range.h"
-#include "../../shared/sum_graph_controller.h"
+#include "../../shared/storage_sum_graph_controller.h"
 
 namespace Sequence {
 
-class TermSumController : public Shared::SumGraphController {
+class TermSumController : public Shared::StorageSumGraphController {
 public:
   TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
@@ -17,7 +17,7 @@ private:
   bool moveCursorHorizontallyToPosition(double position) override;
   I18n::Message legendMessageAtStep(Step step) override;
   double cursorNextStep(double position, int direction) override;
-  Poincare::Layout createFunctionLayout(const char * functionName) override;
+  Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) override;
 };
 
 }
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 86c73fba8..c5eec2f96 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -9,13 +9,12 @@ static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { retur
 
 namespace Sequence {
 
-ListController::ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, ButtonRowController * header, ButtonRowController * footer) :
-  Shared::FunctionListController(parentResponder, sequenceStore, header, footer, I18n::Message::AddSequence),
-  m_sequenceStore(sequenceStore),
+ListController::ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, ButtonRowController * footer) :
+  Shared::StorageFunctionListController(parentResponder, header, footer, I18n::Message::AddSequence),
   m_sequenceTitleCells{},
   m_expressionCells{},
-  m_parameterController(inputEventHandlerDelegate, this, sequenceStore),
-  m_typeParameterController(this, sequenceStore, this, TableCell::Layout::Vertical),
+  m_parameterController(inputEventHandlerDelegate, this),
+  m_typeParameterController(this, this, TableCell::Layout::Vertical),
   m_typeStackController(nullptr, &m_typeParameterController, KDColorWhite, Palette::PurpleDark, Palette::PurpleDark),
   m_sequenceToolbox()
 {
@@ -28,29 +27,13 @@ const char * ListController::title() {
   return I18n::translate(I18n::Message::SequenceTab);
 }
 
-Toolbox * ListController::toolboxForInputEventHandler(InputEventHandler * textInput) {
-  return toolboxForSender(textInput);
-}
-
-TextFieldDelegateApp * ListController::textFieldDelegateApp() {
-  return (App *)app();
-}
-
-ExpressionFieldDelegateApp * ListController::expressionFieldDelegateApp() {
-  return (App *)app();
-}
-
-InputEventHandlerDelegateApp * ListController::inputEventHandlerDelegateApp() {
-  return (App *)app();
-}
-
 int ListController::numberOfExpressionRows() {
   int numberOfRows = 0;
-  for (int i = 0; i < m_sequenceStore->numberOfModels(); i++) {
-    Sequence * sequence = m_sequenceStore->modelAtIndex(i);
+  for (int i = 0; i < modelStore()->numberOfModels(); i++) {
+    ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(i));
     numberOfRows += sequence->numberOfElements();
   }
-  if (m_sequenceStore->numberOfModels() == m_sequenceStore->maxNumberOfModels()) {
+  if (modelStore()->numberOfModels() == modelStore()->maxNumberOfModels()) {
     return numberOfRows;
   }
   return 1 + numberOfRows;
@@ -58,11 +41,11 @@ int ListController::numberOfExpressionRows() {
 
 KDCoordinate ListController::expressionRowHeight(int j) {
   KDCoordinate defaultHeight = Metric::StoreRowHeight;
-  if (m_sequenceStore->numberOfModels() < m_sequenceStore->maxNumberOfModels() && j == numberOfRows() - 1) {
+  if (modelStore()->numberOfModels() < modelStore()->maxNumberOfModels() && j == numberOfRows() - 1) {
     // Add sequence row
     return defaultHeight;
   }
-  Sequence * sequence = m_sequenceStore->modelAtIndex(modelIndexForRow(j));
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(j)));
   Layout layout = sequence->layout();
   if (sequenceDefinitionForRow(j) == 1) {
     layout = sequence->firstInitialConditionLayout();
@@ -78,44 +61,46 @@ KDCoordinate ListController::expressionRowHeight(int j) {
 }
 
 void ListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  Shared::FunctionListController::willDisplayCellAtLocation(cell, i, j);
+  Shared::StorageFunctionListController::willDisplayCellAtLocation(cell, i, j);
   EvenOddCell * myCell = (EvenOddCell *)cell;
   myCell->setEven(modelIndexForRow(j)%2 == 0);
 }
 
+Toolbox * ListController::toolboxForInputEventHandler(InputEventHandler * textInput) {
+  // Set extra cells
+  int recurrenceDepth = -1;
+  int sequenceDefinition = sequenceDefinitionForRow(selectedRow());
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(selectedRow())));
+  if (sequenceDefinition == 0) {
+    recurrenceDepth = sequence->numberOfElements()-1;
+  }
+  m_sequenceToolbox.buildExtraCellsLayouts(sequence->fullName(), recurrenceDepth);
+  // Set sender
+  m_sequenceToolbox.setSender(textInput);
+  return &m_sequenceToolbox;
+}
+
 void ListController::selectPreviousNewSequenceCell() {
   if (sequenceDefinitionForRow(selectedRow()) >= 0) {
     selectCellAtLocation(selectedColumn(), selectedRow()-sequenceDefinitionForRow(selectedRow()));
   }
 }
 
-Toolbox * ListController::toolboxForSender(InputEventHandler * sender) {
-  // Set extra cells
-  int recurrenceDepth = -1;
-  int sequenceDefinition = sequenceDefinitionForRow(selectedRow());
-  Sequence * sequence = m_sequenceStore->modelAtIndex(modelIndexForRow(selectedRow()));
-  if (sequenceDefinition == 0) {
-    recurrenceDepth = sequence->numberOfElements()-1;
-  }
-  m_sequenceToolbox.buildExtraCellsLayouts(sequence->name(), recurrenceDepth);
-  // Set sender
-  m_sequenceToolbox.setSender(sender);
-  return &m_sequenceToolbox;
-}
-
-void ListController::editExpression(Sequence * sequence, int sequenceDefinition, Ion::Events::Event event) {
+void ListController::editExpression(int sequenceDefinition, Ion::Events::Event event) {
+  Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
   char * initialText = nullptr;
   char initialTextContent[TextField::maxBufferSize()];
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     switch (sequenceDefinition) {
       case 0:
-        strlcpy(initialTextContent, sequence->text(), sizeof(initialTextContent));
+        sequence->text(initialTextContent, sizeof(initialTextContent));
         break;
       case 1:
-        strlcpy(initialTextContent, sequence->firstInitialConditionText(), sizeof(initialTextContent));
+        sequence->firstInitialConditionText(initialTextContent, sizeof(initialTextContent));
         break;
       default:
-        strlcpy(initialTextContent, sequence->secondInitialConditionText(), sizeof(initialTextContent));
+        sequence->secondInitialConditionText(initialTextContent, sizeof(initialTextContent));
         break;
     }
     initialText = initialTextContent;
@@ -126,39 +111,36 @@ void ListController::editExpression(Sequence * sequence, int sequenceDefinition,
   static_cast<App *>(app())->localContext()->resetCache();
   switch (sequenceDefinition) {
     case 0:
-      inputController->edit(this, event, sequence, initialText,
+      inputController->edit(this, event, this, initialText,
         [](void * context, void * sender){
-        Sequence * mySequence = (Sequence *)context;
+        ListController * myController = static_cast<ListController *>(context);
         InputViewController * myInputViewController = (InputViewController *)sender;
         const char * textBody = myInputViewController->textBody();
-        mySequence->setContent(textBody);
-        return true; //TODO should return result of mySequence->setContent
+        return myController->editSelectedRecordWithText(textBody);
         },
         [](void * context, void * sender){
         return true;
       });
       break;
   case 1:
-    inputController->edit(this, event, sequence, initialText,
+    inputController->edit(this, event, this, initialText,
       [](void * context, void * sender){
-      Sequence * mySequence = (Sequence *)context;
+      ListController * myController = static_cast<ListController *>(context);
       InputViewController * myInputViewController = (InputViewController *)sender;
       const char * textBody = myInputViewController->textBody();
-      mySequence->setFirstInitialConditionContent(textBody);
-      return true; //TODO should return result of mySequence->setFirstInitialConditionContent
+      return myController->editInitialConditionOfSelectedRecordWithText(textBody, true);
       },
       [](void * context, void * sender){
       return true;
     });
     break;
   default:
-    inputController->edit(this, event, sequence, initialText,
+    inputController->edit(this, event, this, initialText,
       [](void * context, void * sender){
-      Sequence * mySequence = (Sequence *)context;
+      ListController * myController = static_cast<ListController *>(context);
       InputViewController * myInputViewController = (InputViewController *)sender;
       const char * textBody = myInputViewController->textBody();
-      mySequence->setSecondInitialConditionContent(textBody);
-      return true; //TODO should return the result of mySequence->setSecondInitialConditionContent
+      return myController->editInitialConditionOfSelectedRecordWithText(textBody, false);
       },
       [](void * context, void * sender){
       return true;
@@ -166,18 +148,32 @@ void ListController::editExpression(Sequence * sequence, int sequenceDefinition,
   }
 }
 
-bool ListController::removeModelRow(ExpressionModel * model) {
-  Shared::FunctionListController::removeModelRow(model);
-  // Invalidate the sequences context cache
-  static_cast<App *>(app())->localContext()->resetCache();
-  return true;
+bool ListController::editInitialConditionOfSelectedRecordWithText(const char * text, bool firstInitialCondition) {
+  // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
+  resetMemoizationForIndex(k_memoizedCellsCount/2);
+  Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
+  Ion::Storage::Record::ErrorStatus error = firstInitialCondition? sequence->setFirstInitialConditionContent(text) : sequence->setSecondInitialConditionContent(text);
+  return (error == Ion::Storage::Record::ErrorStatus::None);
+}
+
+TextFieldDelegateApp * ListController::textFieldDelegateApp() {
+  return (App *)app();
+}
+
+ExpressionFieldDelegateApp * ListController::expressionFieldDelegateApp() {
+  return (App *)app();
+}
+
+InputEventHandlerDelegateApp * ListController::inputEventHandlerDelegateApp() {
+  return (App *)app();
 }
 
 ListParameterController * ListController::parameterController() {
   return &m_parameterController;
 }
 
-int ListController::maxNumberOfRows() {
+int ListController::maxNumberOfDisplayableRows() {
   return k_maxNumberOfRows;
 }
 
@@ -198,7 +194,8 @@ void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
   willDisplayExpressionCellAtIndex(m_selectableTableView.cellAtLocation(1, j), j);
   myCell->setBaseline(baseline(j));
   // Set the layout
-  Sequence * sequence = m_sequenceStore->modelAtIndex(modelIndexForRow(j));
+  Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(j));
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
   if (sequenceDefinitionForRow(j) == 0) {
     myCell->setLayout(sequence->definitionName());
   }
@@ -215,7 +212,8 @@ void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
 
 void ListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   FunctionExpressionCell * myCell = (FunctionExpressionCell *)cell;
-  Sequence * sequence = m_sequenceStore->modelAtIndex(modelIndexForRow(j));
+  Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(j));
+  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
   if (sequenceDefinitionForRow(j) == 0) {
     myCell->setLayout(sequence->layout());
   }
@@ -241,14 +239,14 @@ int ListController::modelIndexForRow(int j) {
   int sequenceIndex = -1;
   do {
     sequenceIndex++;
-    Sequence * sequence = m_sequenceStore->modelAtIndex(sequenceIndex);
+    ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(sequenceIndex));
     rowIndex += sequence->numberOfElements();
   } while (rowIndex <= j);
   return sequenceIndex;
 }
 
 bool ListController::isAddEmptyRow(int j) {
-  return m_sequenceStore->numberOfModels() < m_sequenceStore->maxNumberOfModels() && j == numberOfRows() - 1;
+  return modelStore()->numberOfModels() < modelStore()->maxNumberOfModels() && j == numberOfRows() - 1;
 }
 
 int ListController::sequenceDefinitionForRow(int j) {
@@ -260,12 +258,13 @@ int ListController::sequenceDefinitionForRow(int j) {
   }
   int rowIndex = 0;
   int sequenceIndex = -1;
-  Sequence * sequence = nullptr;
+  ExpiringPointer<Sequence> sequence(nullptr);
   do {
     sequenceIndex++;
-    sequence = m_sequenceStore->modelAtIndex(sequenceIndex);
+    sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(sequenceIndex));
     rowIndex += sequence->numberOfElements();
   } while (rowIndex <= j);
+  assert(!sequence.isNull());
   return sequence->numberOfElements()-rowIndex+j;
 }
 
@@ -273,30 +272,29 @@ void ListController::addEmptyModel() {
   app()->displayModalViewController(&m_typeStackController, 0.f, 0.f, Metric::TabHeight+Metric::ModalTopMargin, Metric::CommonRightMargin, Metric::ModalBottomMargin, Metric::CommonLeftMargin);
 }
 
-void ListController::editExpression(Shared::ExpressionModel * model, Ion::Events::Event event) {
-  Sequence * sequence = static_cast<Sequence *>(model);
-  editExpression(sequence, sequenceDefinitionForRow(selectedRow()), event);
+void ListController::editExpression(Ion::Events::Event event) {
+  editExpression(sequenceDefinitionForRow(selectedRow()), event);
 }
 
-void ListController::reinitExpression(Shared::ExpressionModel * model) {
+void ListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model) {
   // Invalidate the sequences context cache
   static_cast<App *>(app())->localContext()->resetCache();
-  Sequence * sequence = static_cast<Sequence *>(model);
+  ExpiringPointer<Sequence> sequence = static_cast<ExpiringPointer<Sequence>>(model);
   switch (sequenceDefinitionForRow(selectedRow())) {
     case 1:
-      if (strlen(sequence->firstInitialConditionText()) == 0) {
+      if (sequence->firstInitialConditionExpressionClone().isUninitialized()) {
         return;
       }
       sequence->setFirstInitialConditionContent("");
       break;
     case 2:
-      if (strlen(sequence->secondInitialConditionText()) == 0) {
+      if (sequence->secondInitialConditionExpressionClone().isUninitialized()) {
         return;
       }
       sequence->setSecondInitialConditionContent("");
       break;
     default:
-      if (strlen(sequence->text()) == 0) {
+      if (sequence->expressionClone().isUninitialized()) {
         return;
       }
       sequence->setContent("");
@@ -305,15 +303,11 @@ void ListController::reinitExpression(Shared::ExpressionModel * model) {
   selectableTableView()->reloadData();
 }
 
-KDCoordinate ListController::baseline(int j) const {
-  //TODO copied from Graph::StorageListController, will be refactored when Sequence is a StorageApp
-  assert(j>=0 && j<k_maxNumberOfRows);
-  Shared::FunctionExpressionCell * cell = static_cast<Shared::FunctionExpressionCell *>((const_cast<SelectableTableView *>(&m_selectableTableView))->cellAtLocation(1, j));
-  Poincare::Layout layout = cell->layout();
-  if (layout.isUninitialized()) {
-    return 0.5*const_cast<ListController *>(this)->rowHeight(j);
-  }
-  return 0.5*(const_cast<ListController *>(this)->rowHeight(j)-layout.layoutSize().height())+layout.baseline();
+bool ListController::removeModelRow(Ion::Storage::Record record) {
+  Shared::StorageFunctionListController::removeModelRow(record);
+  // Invalidate the sequences context cache
+  static_cast<App *>(app())->localContext()->resetCache();
+  return true;
 }
 
 }
diff --git a/apps/sequence/list/list_controller.h b/apps/sequence/list/list_controller.h
index 969fa3d7e..0bd1deb71 100644
--- a/apps/sequence/list/list_controller.h
+++ b/apps/sequence/list/list_controller.h
@@ -5,7 +5,7 @@
 #include "../sequence_title_cell.h"
 #include "../sequence_store.h"
 #include "../../shared/function_expression_cell.h"
-#include "../../shared/function_list_controller.h"
+#include "../../shared/storage_function_list_controller.h"
 #include "../../shared/input_event_handler_delegate.h"
 #include "../../shared/layout_field_delegate.h"
 #include "../../shared/text_field_delegate.h"
@@ -15,24 +15,24 @@
 
 namespace Sequence {
 
-class ListController : public Shared::FunctionListController, public Shared::InputEventHandlerDelegate, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
+class ListController : public Shared::StorageFunctionListController, public Shared::InputEventHandlerDelegate, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
 public:
-  ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, ButtonRowController * header, ButtonRowController * footer);
+  ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, ButtonRowController * footer);
   const char * title() override;
   int numberOfExpressionRows() override;
   KDCoordinate expressionRowHeight(int j) override;
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
   Toolbox * toolboxForInputEventHandler(InputEventHandler * handler) override;
   void selectPreviousNewSequenceCell();
-  void editExpression(Sequence * sequence, int sequenceDefinitionIndex, Ion::Events::Event event);
+  void editExpression(int sequenceDefinitionIndex, Ion::Events::Event event);
 private:
   static constexpr KDCoordinate k_expressionCellVerticalMargin = 3;
-  Toolbox * toolboxForSender(InputEventHandler * sender);
+  bool editInitialConditionOfSelectedRecordWithText(const char * text, bool firstInitialCondition);
   Shared::TextFieldDelegateApp * textFieldDelegateApp() override;
   Shared::ExpressionFieldDelegateApp * expressionFieldDelegateApp() override;
   Shared::InputEventHandlerDelegateApp * inputEventHandlerDelegateApp() override;
   ListParameterController * parameterController() override;
-  int maxNumberOfRows() override;
+  int maxNumberOfDisplayableRows() override;
   Shared::FunctionTitleCell * titleCells(int index) override;
   HighlightCell * expressionCells(int index) override;
   void willDisplayTitleCellAtIndex(HighlightCell * cell, int j) override;
@@ -41,12 +41,11 @@ private:
   bool isAddEmptyRow(int j) override;
   int sequenceDefinitionForRow(int j);
   void addEmptyModel() override;
-  void reinitExpression(Shared::ExpressionModel * model) override;
-  void editExpression(Shared::ExpressionModel * model, Ion::Events::Event event) override;
-  bool removeModelRow(Shared::ExpressionModel * model) override;
-  KDCoordinate baseline(int j) const;
+  void reinitSelectedExpression(Shared::ExpiringPointer<Shared::SingleExpressionModelHandle> model) override;
+  void editExpression(Ion::Events::Event event) override;
+  bool removeModelRow(Ion::Storage::Record record) override;
+  SequenceStore * modelStore() override { return static_cast<SequenceStore *>(Shared::StorageFunctionListController::modelStore()); }
   constexpr static int k_maxNumberOfRows = 3*MaxNumberOfSequences;
-  SequenceStore * m_sequenceStore;
   SequenceTitleCell m_sequenceTitleCells[k_maxNumberOfRows];
   Shared::FunctionExpressionCell m_expressionCells[k_maxNumberOfRows];
   ListParameterController m_parameterController;
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index 6b5ac513b..122bc5492 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -9,13 +9,12 @@ using namespace Shared;
 
 namespace Sequence {
 
-ListParameterController::ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * listController, SequenceStore * sequenceStore) :
-  Shared::ListParameterController(listController, sequenceStore, I18n::Message::SequenceColor, I18n::Message::DeleteSequence, this),
+ListParameterController::ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * listController) :
+  Shared::StorageListParameterController(listController, I18n::Message::SequenceColor, I18n::Message::DeleteSequence, this),
   m_typeCell(I18n::Message::SequenceType),
   m_initialRankCell(&m_selectableTableView, inputEventHandlerDelegate, this, m_draftTextBuffer, I18n::Message::FirstTermIndex),
-  m_typeParameterController(this, sequenceStore, listController, TableCell::Layout::Horizontal, Metric::CommonTopMargin, Metric::CommonRightMargin,
-    Metric::CommonBottomMargin, Metric::CommonLeftMargin),
-  m_sequence(nullptr)
+  m_typeParameterController(this, listController, TableCell::Layout::Horizontal, Metric::CommonTopMargin, Metric::CommonRightMargin,
+    Metric::CommonBottomMargin, Metric::CommonLeftMargin)
 {
   static_cast<ExpressionView *>(m_typeCell.subAccessoryView())->setHorizontalMargin(Metric::ExpressionViewHorizontalMargin);
 }
@@ -24,11 +23,6 @@ const char * ListParameterController::title() {
   return I18n::translate(I18n::Message::SequenceOptions);
 }
 
-void ListParameterController::setFunction(Shared::Function * function) {
-  Shared::ListParameterController::setFunction(function);
-  m_sequence = (Sequence *)function;
-}
-
 bool ListParameterController::handleEvent(Ion::Events::Event event) {
   bool hasAdditionalRow = hasInitialRankRow();
 #if FUNCTION_COLOR_CHOICE
@@ -46,7 +40,7 @@ bool ListParameterController::handleEvent(Ion::Events::Event event) {
     if (selectedRowIndex == 0) {
 #endif
       StackViewController * stack = (StackViewController *)(parentResponder());
-      m_typeParameterController.setSequence(m_sequence);
+      m_typeParameterController.setRecord(m_record);
       stack->push(&m_typeParameterController);
       return true;
     }
@@ -63,25 +57,13 @@ bool ListParameterController::handleEvent(Ion::Events::Event event) {
 #else
     if (selectedRowIndex == 2+hasAdditionalRow) {
 #endif
-      if (m_functionStore->numberOfModels() > 0) {
-        m_functionStore->removeModel(m_function);
-        static_cast<App *>(app())->localContext()->resetCache();
-        StackViewController * stack = (StackViewController *)(parentResponder());
-        stack->pop();
-        return true;
-      }
+      static_cast<App *>(app())->localContext()->resetCache();
+      return handleEnterOnRow(selectedRowIndex-hasAdditionalRow-1);
     }
   }
   return false;
 }
 
-int ListParameterController::numberOfRows() {
-  if (hasInitialRankRow()) {
-    return k_totalNumberOfCell;
-  }
-  return k_totalNumberOfCell-1;
-};
-
 HighlightCell * ListParameterController::reusableCell(int index) {
   switch (index) {
     /*case 0:
@@ -93,27 +75,23 @@ HighlightCell * ListParameterController::reusableCell(int index) {
         return &m_initialRankCell;
       }
     default:
-      return Shared::ListParameterController::reusableCell(index-1-hasInitialRankRow());
+      return Shared::StorageListParameterController::reusableCell(index-1-hasInitialRankRow());
   }
 }
 
-int ListParameterController::reusableCellCount() {
-  return k_totalNumberOfCell;
-}
-
 void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
   cell->setHighlighted(index == selectedRow()); // See FIXME in SelectableTableView::reloadData()
-  Shared::ListParameterController::willDisplayCellForIndex(cell, index);
-  if (cell == &m_typeCell && m_sequence != nullptr) {
-    m_typeCell.setLayout(m_sequence->definitionName());
+  Shared::StorageListParameterController::willDisplayCellForIndex(cell, index);
+  if (cell == &m_typeCell && !m_record.isNull()) {
+    m_typeCell.setLayout(sequence()->definitionName());
   }
-  if (cell == &m_initialRankCell && m_sequence != nullptr) {
+  if (cell == &m_initialRankCell && !m_record.isNull()) {
     MessageTableCellWithEditableText * myCell = (MessageTableCellWithEditableText *) cell;
     if (myCell->isEditing()) {
       return;
     }
     char buffer[Sequence::k_initialRankNumberOfDigits+1];
-    Poincare::Integer(m_sequence->initialRank()).serialize(buffer, Sequence::k_initialRankNumberOfDigits+1);
+    Poincare::Integer(sequence()->initialRank()).serialize(buffer, Sequence::k_initialRankNumberOfDigits+1);
     myCell->setAccessoryText(buffer);
   }
 }
@@ -138,7 +116,7 @@ bool ListParameterController::textFieldDidFinishEditing(TextField * textField, c
     app()->displayWarning(I18n::Message::ForbiddenValue);
     return false;
   }
-  m_sequence->setInitialRank(index);
+  sequence()->setInitialRank(index);
   // Invalidate sequence context cache when changing sequence type
   static_cast<App *>(app())->localContext()->resetCache();
   m_selectableTableView.reloadCellAtLocation(0, selectedRow());
@@ -178,8 +156,15 @@ TextFieldDelegateApp * ListParameterController::textFieldDelegateApp() {
   return (TextFieldDelegateApp *)app();
 }
 
-bool ListParameterController::hasInitialRankRow() {
-  return m_sequence && m_sequence->type() != Sequence::Type::Explicit;
+int ListParameterController::totalNumberOfCells() const {
+  if (hasInitialRankRow()) {
+    return k_totalNumberOfCell;
+  }
+  return k_totalNumberOfCell-1;
+};
+
+bool ListParameterController::hasInitialRankRow() const {
+  return !m_record.isNull() && const_cast<ListParameterController *>(this)->sequence()->type() != Sequence::Type::Explicit;
 }
 
 }
diff --git a/apps/sequence/list/list_parameter_controller.h b/apps/sequence/list/list_parameter_controller.h
index 85e2b510c..803c12b8c 100644
--- a/apps/sequence/list/list_parameter_controller.h
+++ b/apps/sequence/list/list_parameter_controller.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_LIST_PARAM_CONTROLLER_H
 #define SEQUENCE_LIST_PARAM_CONTROLLER_H
 
-#include "../../shared/list_parameter_controller.h"
+#include "../../shared/storage_list_parameter_controller.h"
 #include "../../shared/parameter_text_field_delegate.h"
 #include "../sequence.h"
 #include "../sequence_store.h"
@@ -11,15 +11,12 @@ namespace Sequence {
 
 class ListController;
 
-class ListParameterController : public Shared::ListParameterController, public SelectableTableViewDelegate, public Shared::ParameterTextFieldDelegate {
+class ListParameterController : public Shared::StorageListParameterController, public SelectableTableViewDelegate, public Shared::ParameterTextFieldDelegate {
 public:
-  ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * list, SequenceStore * sequenceStore);
+  ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * list);
   const char * title() override;
   bool handleEvent(Ion::Events::Event event) override;
-  void setFunction(Shared::Function * function) override;
-  int numberOfRows() override;
   HighlightCell * reusableCell(int index) override;
-  int reusableCellCount() override;
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
 
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
@@ -32,12 +29,13 @@ private:
 #else
   constexpr static int k_totalNumberOfCell = 4;
 #endif
-  bool hasInitialRankRow();
+  int totalNumberOfCells() const override;
+  Shared::ExpiringPointer<Sequence> sequence() { return static_cast<Shared::ExpiringPointer<Sequence>>(function()); }
+  bool hasInitialRankRow() const;
   MessageTableCellWithChevronAndExpression m_typeCell;
   MessageTableCellWithEditableText m_initialRankCell;
   char m_draftTextBuffer[MessageTableCellWithEditableText::k_bufferLength];
   TypeParameterController m_typeParameterController;
-  Sequence * m_sequence;
 };
 
 }
diff --git a/apps/sequence/list/type_parameter_controller.cpp b/apps/sequence/list/type_parameter_controller.cpp
index 75bbd12e0..3fe2e46c8 100644
--- a/apps/sequence/list/type_parameter_controller.cpp
+++ b/apps/sequence/list/type_parameter_controller.cpp
@@ -7,10 +7,11 @@
 #include <poincare/vertical_offset_layout.h>
 
 using namespace Poincare;
+using namespace Shared;
 
 namespace Sequence {
 
-TypeParameterController::TypeParameterController(Responder * parentResponder, SequenceStore * sequenceStore, ListController * list, TableCell::Layout cellLayout,
+TypeParameterController::TypeParameterController(Responder * parentResponder, ListController * list, TableCell::Layout cellLayout,
   KDCoordinate topMargin, KDCoordinate rightMargin, KDCoordinate bottomMargin, KDCoordinate leftMargin) :
   ViewController(parentResponder),
   m_expliciteCell(I18n::Message::Explicit, cellLayout),
@@ -18,8 +19,7 @@ TypeParameterController::TypeParameterController(Responder * parentResponder, Se
   m_doubleRecurenceCell(I18n::Message::DoubleRecurrence, cellLayout),
   m_layouts{},
   m_selectableTableView(this),
-  m_sequenceStore(sequenceStore),
-  m_sequence(nullptr),
+  m_record(),
   m_listController(list)
 {
   m_selectableTableView.setMargins(topMargin, rightMargin, bottomMargin, leftMargin);
@@ -27,10 +27,10 @@ TypeParameterController::TypeParameterController(Responder * parentResponder, Se
 }
 
 const char * TypeParameterController::title() {
-  if (m_sequence) {
-    return I18n::translate(I18n::Message::SequenceType);
+  if (m_record.isNull()) {
+    return I18n::translate(I18n::Message::ChooseSequenceType);
   }
-  return I18n::translate(I18n::Message::ChooseSequenceType);
+  return I18n::translate(I18n::Message::SequenceType);
 }
 
 View * TypeParameterController::view() {
@@ -54,16 +54,16 @@ void TypeParameterController::didBecomeFirstResponder() {
 
 bool TypeParameterController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    if (m_sequence) {
+    if (!m_record.isNull()) {
       Sequence::Type sequenceType = (Sequence::Type)selectedRow();
-      if (m_sequence->type() != sequenceType) {
+      if (sequence()->type() != sequenceType) {
         m_listController->selectPreviousNewSequenceCell();
-        m_sequence->setType(sequenceType);
+        sequence()->setType(sequenceType);
         // Invalidate sequence context cache when changing sequence type
         static_cast<App *>(app())->localContext()->resetCache();
         // Reset the first index if the new type is "Explicit"
         if (sequenceType == Sequence::Type::Explicit) {
-          m_sequence->setInitialRank(0);
+          sequence()->setInitialRank(0);
         }
       }
       StackViewController * stack = stackController();
@@ -72,13 +72,20 @@ bool TypeParameterController::handleEvent(Ion::Events::Event event) {
       stack->pop();
       return true;
     }
-    Sequence * newSequence = static_cast<Sequence *>(m_sequenceStore->addEmptyModel());
+
+    Ion::Storage::Record::ErrorStatus error = sequenceStore()->addEmptyModel();
+    if (error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable) {
+      return false;
+    }
+    assert(error == Ion::Storage::Record::ErrorStatus::None);
+    Ion::Storage::Record record = sequenceStore()->recordAtIndex(sequenceStore()->numberOfModels()-1);
+    ExpiringPointer<Sequence> newSequence = sequenceStore()->modelForRecord(record);
     newSequence->setType((Sequence::Type)selectedRow());
     app()->dismissModalViewController();
-    m_listController->editExpression(newSequence, 0, Ion::Events::OK);
+    m_listController->editExpression(0, Ion::Events::OK);
     return true;
   }
-  if (event == Ion::Events::Left && m_sequence) {
+  if (event == Ion::Events::Left && !m_record.isNull()) {
     stackController()->pop();
     return true;
   }
@@ -101,17 +108,17 @@ int TypeParameterController::reusableCellCount() {
 }
 
 KDCoordinate TypeParameterController::cellHeight() {
-  if (m_sequence) {
-    return Metric::ParameterCellHeight;
+  if (m_record.isNull()) {
+    return 50;
   }
-  return 50;
+  return Metric::ParameterCellHeight;
 }
 
 void TypeParameterController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  const char * nextName = m_sequenceStore->firstAvailableName();
+  const char * nextName = sequenceStore()->firstAvailableName();
   const KDFont * font = KDFont::LargeFont;
-  if (m_sequence) {
-    nextName = m_sequence->name();
+  if (!m_record.isNull()) {
+    nextName = sequence()->fullName();
     font = KDFont::SmallFont;
   }
   const char * subscripts[3] = {"n", "n+1", "n+2"};
@@ -123,8 +130,13 @@ void TypeParameterController::willDisplayCellAtLocation(HighlightCell * cell, in
   myCell->setLayout(m_layouts[j]);
 }
 
-void TypeParameterController::setSequence(Sequence * sequence) {
-  m_sequence = sequence;
+void TypeParameterController::setRecord(Ion::Storage::Record record) {
+  m_record = record;
+}
+
+SequenceStore * TypeParameterController::sequenceStore() {
+  App * a = static_cast<App *>(app());
+  return a->functionStore();
 }
 
 StackViewController * TypeParameterController::stackController() const {
diff --git a/apps/sequence/list/type_parameter_controller.h b/apps/sequence/list/type_parameter_controller.h
index c2eef8b91..2dbd318e0 100644
--- a/apps/sequence/list/type_parameter_controller.h
+++ b/apps/sequence/list/type_parameter_controller.h
@@ -11,7 +11,7 @@ class ListController;
 
 class TypeParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  TypeParameterController(Responder * parentResponder, SequenceStore * sequenceStore, ListController * list,
+  TypeParameterController(Responder * parentResponder, ListController * list,
     TableCell::Layout cellLayout, KDCoordinate topMargin = 0, KDCoordinate rightMargin = 0,
     KDCoordinate bottomMargin = 0, KDCoordinate leftMargin = 0);
   const char * title() override;
@@ -25,17 +25,21 @@ public:
   HighlightCell * reusableCell(int index) override;
   int reusableCellCount() override;
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
-  void setSequence(Sequence * sequence);
+  void setRecord(Ion::Storage::Record record);
 private:
   StackViewController * stackController() const;
+  Shared::ExpiringPointer<Sequence> sequence() {
+    assert(!m_record.isNull());
+    return sequenceStore()->modelForRecord(m_record);
+  }
+  SequenceStore * sequenceStore();
   constexpr static int k_totalNumberOfCell = 3;
   ExpressionTableCellWithPointer m_expliciteCell;
   ExpressionTableCellWithPointer m_singleRecurrenceCell;
   ExpressionTableCellWithPointer m_doubleRecurenceCell;
   Poincare::Layout m_layouts[k_totalNumberOfCell];
   SelectableTableView m_selectableTableView;
-  SequenceStore * m_sequenceStore;
-  Sequence * m_sequence;
+  Ion::Storage::Record m_record;
   ListController * m_listController;
 };
 
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index e195b2fae..4192ca9f9 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -14,9 +14,6 @@ namespace Sequence {
 class Sequence : public Shared::StorageFunction {
 friend class SequenceStore;
 public:
-  static constexpr char extension[] = "seq"; // TODO: store this elsewhere?
-
-
   enum class Type {
     Explicit = 0,
     SingleRecurrence = 1,
diff --git a/apps/sequence/sequence_context.cpp b/apps/sequence/sequence_context.cpp
index 193dc9b98..76d20b3a5 100644
--- a/apps/sequence/sequence_context.cpp
+++ b/apps/sequence/sequence_context.cpp
@@ -3,6 +3,7 @@
 #include <cmath>
 
 using namespace Poincare;
+using namespace Shared;
 
 namespace Sequence {
 
@@ -49,22 +50,22 @@ void TemplatedSequenceContext<T>::step(SequenceStore * sequenceStore, SequenceCo
   }
 
   /* Evaluate new u(n) and v(n) */
-  Sequence * u = sequenceStore->numberOfModels() > 0 ? sequenceStore->modelAtIndex(0) : nullptr;
-  u = u && u->isDefined() ? u : nullptr;
-  Sequence * v = sequenceStore->numberOfModels() > 1 ? sequenceStore->modelAtIndex(1) : nullptr;
-  v = v && v->isDefined() ? v : nullptr;
+  ExpiringPointer<Sequence> u = sequenceStore->numberOfModels() > 0 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(0)) : nullptr;
+  u = u.isNull() && u->isDefined() ? u : nullptr;
+  ExpiringPointer<Sequence> v = sequenceStore->numberOfModels() > 1 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(1)) : nullptr;
+  v = v.isNull() && v->isDefined() ? v : nullptr;
   /* Switch u & v  if the name of u is v */
-  if (u != nullptr && u->name()[0] ==  SequenceStore::k_sequenceNames[1][0]) {
-    Sequence * temp = u;
+  if (!u.isNull() && u->fullName()[0] ==  SequenceStore::k_sequenceNames[1][0]) {
+     ExpiringPointer<Sequence> temp = u;
     u = v;
     v = temp;
   }
 
   /* Approximate u & v at the new rank. We evaluate u twice in case its
    * expression depends on v. */
-  m_values[0][0] = u ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
-  m_values[1][0] = v ? v->approximateToNextRank<T>(m_rank, sqctx) : NAN;
-  m_values[0][0] = u ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[0][0] = !u.isNull() ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[1][0] = !v.isNull() ? v->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[0][0] = !u.isNull() ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
 }
 
 template class TemplatedSequenceContext<float>;
diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 157d9cf19..718a3e3d3 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -9,23 +9,32 @@ namespace Sequence {
 
 constexpr const char * SequenceStore::k_sequenceNames[MaxNumberOfSequences];
 
-Ion::Storage::Record::ErrorStatus SequenceStore::addEmptyModel() {
+const char * SequenceStore::firstAvailableName(int * nameIndex) {
   // Choose available name
-  const char * name;
   int currentNameIndex = 0;
   while (currentNameIndex < MaxNumberOfSequences) {
-    name = k_sequenceNames[currentNameIndex];
-    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Sequence::extension).isNull()) {
-      break;
+    const char * name = k_sequenceNames[currentNameIndex];
+    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Shared::GlobalContext::seqExtension).isNull()) {
+      if (nameIndex) {
+        *nameIndex = currentNameIndex;
+      }
+      return name;
     }
     currentNameIndex++;
   }
-  assert(currentNameIndex < MaxNumberOfSequences);
+  return nullptr;
+}
+
+Ion::Storage::Record::ErrorStatus SequenceStore::addEmptyModel() {
+  // Choose available name
+  int nameIndex;
+  const char * name = firstAvailableName(&nameIndex);
+  assert(name);
   // Choose the corresponding color
-  KDColor color = Palette::DataColor[currentNameIndex];
+  KDColor color = Palette::DataColor[nameIndex];
   Sequence::SequenceRecordData data(color);
   // m_sequences
-  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, Sequence::extension, &data, sizeof(data));
+  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, modelExtension(), &data, sizeof(data));
 }
 
 void SequenceStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index ce952f4fe..4082de393 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -2,6 +2,7 @@
 #define SEQUENCE_SEQUENCE_STORE_H
 
 #include "../shared/storage_function_store.h"
+#include "../shared/global_context.h"
 #include "sequence.h"
 #include <stdint.h>
 #include <escher.h>
@@ -13,18 +14,19 @@ public:
   using Shared::StorageFunctionStore::StorageFunctionStore;
   char symbol() const override { return Sequence::Symbol(); }
   Shared::ExpiringPointer<Sequence> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Sequence>(static_cast<Sequence *>(privateModelForRecord(record))); }
+  Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   /* WARNING: after calling removeModel or removeAll, the sequence context
    * need to invalidate its cache as the sequences evaluations might have
    * changed */
   int maxNumberOfModels() const override { return MaxNumberOfSequences; }
 
+  static const char * firstAvailableName(int * nameIndex = nullptr);
   static constexpr const char * k_sequenceNames[MaxNumberOfSequences] = {
     "u", "v"//, "w"
   };
 
 private:
-  const char * modelExtension() const override { return Sequence::extension; }
-  Ion::Storage::Record::ErrorStatus addEmptyModel() override;
+  const char * modelExtension() const override { return Shared::GlobalContext::seqExtension; }
   /* We don't really use model memoization as the number of Sequence is limited
    * and we keep enough Sequences to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
diff --git a/apps/sequence/values/values_controller.cpp b/apps/sequence/values/values_controller.cpp
index a71f3406e..653444660 100644
--- a/apps/sequence/values/values_controller.cpp
+++ b/apps/sequence/values/values_controller.cpp
@@ -6,11 +6,10 @@ using namespace Shared;
 
 namespace Sequence {
 
-ValuesController::ValuesController(Responder * parentResponder,InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, Interval * interval, ButtonRowController * header) :
-  Shared::ValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::NColumn, &m_intervalParameterController, interval),
+ValuesController::ValuesController(Responder * parentResponder,InputEventHandlerDelegate * inputEventHandlerDelegate, Interval * interval, ButtonRowController * header) :
+  Shared::StorageValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::NColumn, &m_intervalParameterController, interval),
   m_sequenceTitleCells{},
   m_floatCells{},
-  m_sequenceStore(sequenceStore),
 #if COPY_COLUMN
   m_sequenceParameterController('n'),
 #endif
@@ -22,7 +21,7 @@ ValuesController::ValuesController(Responder * parentResponder,InputEventHandler
 }
 
 void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  Shared::ValuesController::willDisplayCellAtLocation(cell, i, j);
+  Shared::StorageValuesController::willDisplayCellAtLocation(cell, i, j);
   // The cell is the abscissa title cell:
   if (j == 0 && i == 0) {
     EvenOddMessageTextCell * mytitleCell = (EvenOddMessageTextCell *)cell;
@@ -32,14 +31,14 @@ void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, in
   // The cell is a function title cell:
   if (j == 0 && i > 0) {
     SequenceTitleCell * myCell = (SequenceTitleCell *)cell;
-    Sequence * sequence = m_sequenceStore->activeFunctionAtIndex(i-1);
+    Shared::ExpiringPointer<Sequence> sequence = functionStore()->modelForRecord(recordAtColumn(i));
     myCell->setLayout(sequence->nameLayout());
     myCell->setColor(sequence->color());
   }
 }
 
 I18n::Message ValuesController::emptyMessage() {
-  if (m_sequenceStore->numberOfDefinedModels() == 0) {
+  if (functionStore()->numberOfDefinedModels() == 0) {
     return I18n::Message::NoSequence;
   }
   return I18n::Message::NoActivatedSequence;
@@ -53,7 +52,7 @@ bool ValuesController::setDataAtLocation(double floatBody, int columnIndex, int
   if (floatBody < 0) {
       return false;
   }
-  return Shared::ValuesController::setDataAtLocation(std::round(floatBody), columnIndex, rowIndex);
+  return Shared::StorageValuesController::setDataAtLocation(std::round(floatBody), columnIndex, rowIndex);
 }
 
 int ValuesController::maxNumberOfCells() {
@@ -74,11 +73,7 @@ EvenOddBufferTextCell * ValuesController::floatCells(int j) {
   return &m_floatCells[j];
 }
 
-SequenceStore * ValuesController::functionStore() const {
-  return m_sequenceStore;
-}
-
-Shared::ValuesFunctionParameterController * ValuesController::functionParameterController() {
+Shared::StorageValuesFunctionParameterController * ValuesController::functionParameterController() {
 #if COPY_COLUMN
   return &m_sequenceParameterController;
 #else
diff --git a/apps/sequence/values/values_controller.h b/apps/sequence/values/values_controller.h
index 583aac8bb..3f4902f07 100644
--- a/apps/sequence/values/values_controller.h
+++ b/apps/sequence/values/values_controller.h
@@ -3,14 +3,14 @@
 
 #include "../sequence_store.h"
 #include "../sequence_title_cell.h"
-#include "../../shared/values_controller.h"
+#include "../../shared/storage_values_controller.h"
 #include "interval_parameter_controller.h"
 
 namespace Sequence {
 
-class ValuesController : public Shared::ValuesController {
+class ValuesController : public Shared::StorageValuesController {
 public:
-  ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, Shared::Interval * interval, ButtonRowController * header);
+  ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Shared::Interval * interval, ButtonRowController * header);
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
   I18n::Message emptyMessage() override;
   IntervalParameterController * intervalParameterController() override;
@@ -24,12 +24,11 @@ private:
   SequenceTitleCell * functionTitleCells(int j) override;
   EvenOddBufferTextCell m_floatCells[k_maxNumberOfCells];
   EvenOddBufferTextCell * floatCells(int j) override;
-  SequenceStore * m_sequenceStore;
-  SequenceStore * functionStore() const override;
+  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::StorageValuesController::functionStore()); }
 #if COPY_COLUMN
   Shared::ValuesFunctionParameterController m_sequenceParameterController;
 #endif
-  Shared::ValuesFunctionParameterController * functionParameterController() override;
+  Shared::StorageValuesFunctionParameterController * functionParameterController() override;
   IntervalParameterController m_intervalParameterController;
 };
 
diff --git a/apps/shared/global_context.cpp b/apps/shared/global_context.cpp
index 336945f11..48386b2a5 100644
--- a/apps/shared/global_context.cpp
+++ b/apps/shared/global_context.cpp
@@ -12,7 +12,7 @@ namespace Shared {
 
 constexpr char GlobalContext::expExtension[];
 constexpr char GlobalContext::funcExtension[];
-//constexpr char GlobalContext::seqExtension[];
+constexpr char GlobalContext::seqExtension[];
 constexpr const char * GlobalContext::k_extensions[];
 
 bool GlobalContext::SymbolAbstractNameIsFree(const char * baseName) {
diff --git a/apps/shared/global_context.h b/apps/shared/global_context.h
index d94ac7d0a..10a0c8d09 100644
--- a/apps/shared/global_context.h
+++ b/apps/shared/global_context.h
@@ -11,15 +11,13 @@
 
 namespace Shared {
 
-class Integer;
-
 class GlobalContext final : public Poincare::Context {
 public:
   static constexpr int k_numberOfExtensions = 2;
   static constexpr char expExtension[] = "exp"; // TODO: store this elsewhere?
   static constexpr char funcExtension[] = "func"; // TODO: store this elsewhere?
   static constexpr const char * k_extensions[] = {expExtension, funcExtension};
-  //static constexpr char seqExtension[] = "seq";
+  static constexpr char seqExtension[] = "seq";
 
   // Storage information
   static bool SymbolAbstractNameIsFree(const char * baseName);
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index d989de397..e2f379e4e 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -318,7 +318,7 @@ KDCoordinate StorageFunctionListController::nameWidth(int nameLength) const {
 }
 
 KDCoordinate StorageFunctionListController::privateBaseline(int j) const {
-  assert(j >= 0 && j < const_cast<StorageFunctionListController *>(this)->modelStore()->numberOfModels());
+  assert(j >= 0 && j < const_cast<StorageFunctionListController *>(this)->numberOfExpressionRows());
   FunctionExpressionCell * cell = static_cast<Shared::FunctionExpressionCell *>((const_cast<SelectableTableView *>(&m_selectableTableView))->cellAtLocation(1, j));
   Poincare::Layout layout = cell->layout();
   if (layout.isUninitialized()) {
diff --git a/apps/shared/storage_list_parameter_controller.h b/apps/shared/storage_list_parameter_controller.h
index 35b56ffdd..88e61fb73 100644
--- a/apps/shared/storage_list_parameter_controller.h
+++ b/apps/shared/storage_list_parameter_controller.h
@@ -31,11 +31,11 @@ protected:
     return 2;
 #endif
   }
+  StorageFunctionStore * functionStore();
+  ExpiringPointer<StorageFunction> function();
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
 private:
-  ExpiringPointer<StorageFunction> function();
-  StorageFunctionStore * functionStore();
 #if FUNCTION_COLOR_CHOICE
   MessageTableCellWithChevron m_colorCell;
 #endif
diff --git a/apps/shared/storage_values_controller.h b/apps/shared/storage_values_controller.h
index fa345d8e6..0e5219a86 100644
--- a/apps/shared/storage_values_controller.h
+++ b/apps/shared/storage_values_controller.h
@@ -47,12 +47,12 @@ protected:
   bool setDataAtLocation(double floatBody, int columnIndex, int rowIndex) override;
   virtual void updateNumberOfColumns();
   virtual StorageFunctionStore * functionStore() const;
+  virtual Ion::Storage::Record recordAtColumn(int i);
   Interval * m_interval;
   int m_numberOfColumns;
   bool m_numberOfColumnsNeedUpdate;
 private:
   static constexpr const KDFont * k_font = KDFont::SmallFont;
-  virtual Ion::Storage::Record recordAtColumn(int i);
   Responder * tabController() const override;
   SelectableTableView * selectableTableView() override { return &m_selectableTableView; }
   void configureAbscissa();

From cff3d56f2277123d7b7edadc7da3e0f846d81482 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 28 Feb 2019 16:43:15 +0100
Subject: [PATCH 120/295] [sequence] SequenceStore returns Sequence * instead
 of ExpiringPointer<Sequence>

SequenceStore keep all its Sequences in an array which fix Sequence
addresses
---
 apps/sequence/graph/graph_controller.cpp      |  6 ++---
 apps/sequence/graph/graph_view.cpp            |  2 +-
 apps/sequence/graph/term_sum_controller.cpp   |  2 +-
 apps/sequence/list/list_controller.cpp        | 22 +++++++++----------
 .../sequence/list/list_parameter_controller.h |  2 +-
 .../list/type_parameter_controller.cpp        |  2 +-
 .../sequence/list/type_parameter_controller.h |  2 +-
 apps/sequence/sequence_context.cpp            | 18 +++++++--------
 apps/sequence/sequence_store.h                |  5 ++++-
 apps/sequence/values/values_controller.cpp    |  2 +-
 apps/shared/expiring_pointer.h                |  8 +------
 11 files changed, 34 insertions(+), 37 deletions(-)

diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 1ba55c2b7..6e33b612f 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -32,7 +32,7 @@ float GraphController::interestingXMin() const {
   int nmin = INT_MAX;
   int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
   for (int i = 0; i < nbOfActiveModels; i++) {
-    ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    Sequence * s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     nmin = minInt(nmin, s->initialRank());
   }
   assert(nmin < INT_MAX);
@@ -45,7 +45,7 @@ float GraphController::interestingXHalfRange() const {
   int nmax = 0;
   int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
   for (int i = 0; i < nbOfActiveModels; i++) {
-    ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    Sequence * s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     int firstInterestingIndex = s->initialRank();
     nmin = minInt(nmin, firstInterestingIndex);
     nmax = maxInt(nmax, firstInterestingIndex + standardRange);
@@ -75,7 +75,7 @@ bool GraphController::moveCursorHorizontally(int direction) {
   if (x < 0.0) {
     return false;
   }
-  ExpiringPointer<Sequence> s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
+  Sequence * s = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   double y = s->evaluateAtAbscissa(x, myApp->localContext());
   m_cursor->moveTo(x, y);
diff --git a/apps/sequence/graph/graph_view.cpp b/apps/sequence/graph/graph_view.cpp
index 7611adfae..9912b2ade 100644
--- a/apps/sequence/graph/graph_view.cpp
+++ b/apps/sequence/graph/graph_view.cpp
@@ -16,7 +16,7 @@ void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
   StorageFunctionGraphView::drawRect(ctx, rect);
   for (int i = 0; i < m_sequenceStore->numberOfActiveFunctions(); i++) {
     Ion::Storage::Record record = m_sequenceStore->activeRecordAtIndex(i);
-    ExpiringPointer<Sequence> s = m_sequenceStore->modelForRecord(record);;
+    Sequence * s = m_sequenceStore->modelForRecord(record);;
     float rectXMin = pixelToFloat(Axis::Horizontal, rect.left() - k_externRectMargin);
     rectXMin = rectXMin < 0 ? 0 : rectXMin;
     float rectXMax = pixelToFloat(Axis::Horizontal, rect.right() + k_externRectMargin);
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 15a018a93..be27cea2f 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -49,7 +49,7 @@ double TermSumController::cursorNextStep(double x, int direction) {
 }
 
 Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) {
-  Shared::ExpiringPointer<Sequence> sequence = static_cast<Shared::ExpiringPointer<Sequence>>(function);
+  Sequence * sequence = static_cast<Sequence *>(function.pointer());
   return sequence->nameLayout();
 }
 
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index c5eec2f96..80117dec1 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -30,7 +30,7 @@ const char * ListController::title() {
 int ListController::numberOfExpressionRows() {
   int numberOfRows = 0;
   for (int i = 0; i < modelStore()->numberOfModels(); i++) {
-    ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(i));
+    Sequence * sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(i));
     numberOfRows += sequence->numberOfElements();
   }
   if (modelStore()->numberOfModels() == modelStore()->maxNumberOfModels()) {
@@ -45,7 +45,7 @@ KDCoordinate ListController::expressionRowHeight(int j) {
     // Add sequence row
     return defaultHeight;
   }
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(j)));
+  Sequence * sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(j)));
   Layout layout = sequence->layout();
   if (sequenceDefinitionForRow(j) == 1) {
     layout = sequence->firstInitialConditionLayout();
@@ -70,7 +70,7 @@ Toolbox * ListController::toolboxForInputEventHandler(InputEventHandler * textIn
   // Set extra cells
   int recurrenceDepth = -1;
   int sequenceDefinition = sequenceDefinitionForRow(selectedRow());
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(selectedRow())));
+  Sequence * sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(modelIndexForRow(selectedRow())));
   if (sequenceDefinition == 0) {
     recurrenceDepth = sequence->numberOfElements()-1;
   }
@@ -88,7 +88,7 @@ void ListController::selectPreviousNewSequenceCell() {
 
 void ListController::editExpression(int sequenceDefinition, Ion::Events::Event event) {
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
+  Sequence * sequence = modelStore()->modelForRecord(record);
   char * initialText = nullptr;
   char initialTextContent[TextField::maxBufferSize()];
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
@@ -152,7 +152,7 @@ bool ListController::editInitialConditionOfSelectedRecordWithText(const char * t
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
+  Sequence * sequence = modelStore()->modelForRecord(record);
   Ion::Storage::Record::ErrorStatus error = firstInitialCondition? sequence->setFirstInitialConditionContent(text) : sequence->setSecondInitialConditionContent(text);
   return (error == Ion::Storage::Record::ErrorStatus::None);
 }
@@ -195,7 +195,7 @@ void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
   myCell->setBaseline(baseline(j));
   // Set the layout
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(j));
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
+  Sequence * sequence = modelStore()->modelForRecord(record);
   if (sequenceDefinitionForRow(j) == 0) {
     myCell->setLayout(sequence->definitionName());
   }
@@ -213,7 +213,7 @@ void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
 void ListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   FunctionExpressionCell * myCell = (FunctionExpressionCell *)cell;
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(j));
-  ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(record);
+  Sequence * sequence = modelStore()->modelForRecord(record);
   if (sequenceDefinitionForRow(j) == 0) {
     myCell->setLayout(sequence->layout());
   }
@@ -239,7 +239,7 @@ int ListController::modelIndexForRow(int j) {
   int sequenceIndex = -1;
   do {
     sequenceIndex++;
-    ExpiringPointer<Sequence> sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(sequenceIndex));
+    Sequence * sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(sequenceIndex));
     rowIndex += sequence->numberOfElements();
   } while (rowIndex <= j);
   return sequenceIndex;
@@ -258,13 +258,13 @@ int ListController::sequenceDefinitionForRow(int j) {
   }
   int rowIndex = 0;
   int sequenceIndex = -1;
-  ExpiringPointer<Sequence> sequence(nullptr);
+  Sequence * sequence;
   do {
     sequenceIndex++;
     sequence = modelStore()->modelForRecord(modelStore()->recordAtIndex(sequenceIndex));
     rowIndex += sequence->numberOfElements();
   } while (rowIndex <= j);
-  assert(!sequence.isNull());
+  assert(sequence);
   return sequence->numberOfElements()-rowIndex+j;
 }
 
@@ -279,7 +279,7 @@ void ListController::editExpression(Ion::Events::Event event) {
 void ListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model) {
   // Invalidate the sequences context cache
   static_cast<App *>(app())->localContext()->resetCache();
-  ExpiringPointer<Sequence> sequence = static_cast<ExpiringPointer<Sequence>>(model);
+  Sequence * sequence = static_cast<Sequence *>(model.pointer());
   switch (sequenceDefinitionForRow(selectedRow())) {
     case 1:
       if (sequence->firstInitialConditionExpressionClone().isUninitialized()) {
diff --git a/apps/sequence/list/list_parameter_controller.h b/apps/sequence/list/list_parameter_controller.h
index 803c12b8c..e65adc82e 100644
--- a/apps/sequence/list/list_parameter_controller.h
+++ b/apps/sequence/list/list_parameter_controller.h
@@ -30,7 +30,7 @@ private:
   constexpr static int k_totalNumberOfCell = 4;
 #endif
   int totalNumberOfCells() const override;
-  Shared::ExpiringPointer<Sequence> sequence() { return static_cast<Shared::ExpiringPointer<Sequence>>(function()); }
+  Sequence * sequence() { return static_cast<Sequence *>(function().pointer()); }
   bool hasInitialRankRow() const;
   MessageTableCellWithChevronAndExpression m_typeCell;
   MessageTableCellWithEditableText m_initialRankCell;
diff --git a/apps/sequence/list/type_parameter_controller.cpp b/apps/sequence/list/type_parameter_controller.cpp
index 3fe2e46c8..ab01f1c43 100644
--- a/apps/sequence/list/type_parameter_controller.cpp
+++ b/apps/sequence/list/type_parameter_controller.cpp
@@ -79,7 +79,7 @@ bool TypeParameterController::handleEvent(Ion::Events::Event event) {
     }
     assert(error == Ion::Storage::Record::ErrorStatus::None);
     Ion::Storage::Record record = sequenceStore()->recordAtIndex(sequenceStore()->numberOfModels()-1);
-    ExpiringPointer<Sequence> newSequence = sequenceStore()->modelForRecord(record);
+    Sequence * newSequence = sequenceStore()->modelForRecord(record);
     newSequence->setType((Sequence::Type)selectedRow());
     app()->dismissModalViewController();
     m_listController->editExpression(0, Ion::Events::OK);
diff --git a/apps/sequence/list/type_parameter_controller.h b/apps/sequence/list/type_parameter_controller.h
index 2dbd318e0..4c8a36136 100644
--- a/apps/sequence/list/type_parameter_controller.h
+++ b/apps/sequence/list/type_parameter_controller.h
@@ -28,7 +28,7 @@ public:
   void setRecord(Ion::Storage::Record record);
 private:
   StackViewController * stackController() const;
-  Shared::ExpiringPointer<Sequence> sequence() {
+  Sequence * sequence() {
     assert(!m_record.isNull());
     return sequenceStore()->modelForRecord(m_record);
   }
diff --git a/apps/sequence/sequence_context.cpp b/apps/sequence/sequence_context.cpp
index 76d20b3a5..d6f6cac92 100644
--- a/apps/sequence/sequence_context.cpp
+++ b/apps/sequence/sequence_context.cpp
@@ -50,22 +50,22 @@ void TemplatedSequenceContext<T>::step(SequenceStore * sequenceStore, SequenceCo
   }
 
   /* Evaluate new u(n) and v(n) */
-  ExpiringPointer<Sequence> u = sequenceStore->numberOfModels() > 0 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(0)) : nullptr;
-  u = u.isNull() && u->isDefined() ? u : nullptr;
-  ExpiringPointer<Sequence> v = sequenceStore->numberOfModels() > 1 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(1)) : nullptr;
-  v = v.isNull() && v->isDefined() ? v : nullptr;
+  Sequence * u = sequenceStore->numberOfModels() > 0 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(0)) : nullptr;
+  u = u && u->isDefined() ? u : nullptr;
+  Sequence * v = sequenceStore->numberOfModels() > 1 ? sequenceStore->modelForRecord(sequenceStore->recordAtIndex(1)) : nullptr;
+  v = v && v->isDefined() ? v : nullptr;
   /* Switch u & v  if the name of u is v */
-  if (!u.isNull() && u->fullName()[0] ==  SequenceStore::k_sequenceNames[1][0]) {
-     ExpiringPointer<Sequence> temp = u;
+  if (u && u->fullName()[0] ==  SequenceStore::k_sequenceNames[1][0]) {
+    Sequence * temp = u;
     u = v;
     v = temp;
   }
 
   /* Approximate u & v at the new rank. We evaluate u twice in case its
    * expression depends on v. */
-  m_values[0][0] = !u.isNull() ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
-  m_values[1][0] = !v.isNull() ? v->approximateToNextRank<T>(m_rank, sqctx) : NAN;
-  m_values[0][0] = !u.isNull() ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[0][0] = u ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[1][0] = v ? v->approximateToNextRank<T>(m_rank, sqctx) : NAN;
+  m_values[0][0] = u ? u->approximateToNextRank<T>(m_rank, sqctx) : NAN;
 }
 
 template class TemplatedSequenceContext<float>;
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 4082de393..2b5143cd6 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -13,7 +13,10 @@ class SequenceStore : public Shared::StorageFunctionStore {
 public:
   using Shared::StorageFunctionStore::StorageFunctionStore;
   char symbol() const override { return Sequence::Symbol(); }
-  Shared::ExpiringPointer<Sequence> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Sequence>(static_cast<Sequence *>(privateModelForRecord(record))); }
+  /* Sequence Store hold all its Sequences in an array. The Sequence pointers
+   * return by modelForRecord are therefore non-expirable. We choose to return
+   * Sequence * instead of ExpiringPointer<Sequence>. */
+  Sequence * modelForRecord(Ion::Storage::Record record) const { return static_cast<Sequence *>(privateModelForRecord(record)); }
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   /* WARNING: after calling removeModel or removeAll, the sequence context
    * need to invalidate its cache as the sequences evaluations might have
diff --git a/apps/sequence/values/values_controller.cpp b/apps/sequence/values/values_controller.cpp
index 653444660..8b46ec61d 100644
--- a/apps/sequence/values/values_controller.cpp
+++ b/apps/sequence/values/values_controller.cpp
@@ -31,7 +31,7 @@ void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, in
   // The cell is a function title cell:
   if (j == 0 && i > 0) {
     SequenceTitleCell * myCell = (SequenceTitleCell *)cell;
-    Shared::ExpiringPointer<Sequence> sequence = functionStore()->modelForRecord(recordAtColumn(i));
+    Sequence * sequence = functionStore()->modelForRecord(recordAtColumn(i));
     myCell->setLayout(sequence->nameLayout());
     myCell->setColor(sequence->color());
   }
diff --git a/apps/shared/expiring_pointer.h b/apps/shared/expiring_pointer.h
index 699e47939..871a61b97 100644
--- a/apps/shared/expiring_pointer.h
+++ b/apps/shared/expiring_pointer.h
@@ -15,13 +15,7 @@ public:
     s_global = rawPointer;
 #endif
   }
-  template<class U>
-  ExpiringPointer(ExpiringPointer<U> p) : m_rawPointer(static_cast<T *>(p.m_rawPointer)) {
-#if DEBUG
-    s_global = m_rawPointer;
-#endif
-  }
-  bool isNull() { return m_rawPointer == nullptr; }
+  T * pointer() { return m_rawPointer; }
   T *operator->() {
 #if DEBUG
     assert(m_rawPointer != nullptr && m_rawPointer == s_global);

From c085ab5f1e3fce5c70761b02aaa6534ba69573f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 13:52:01 +0100
Subject: [PATCH 121/295] [sequence] Implement specific setExpressionContent
 for Sequence model

---
 apps/sequence/sequence.cpp              | 22 +++++++++++++++
 apps/sequence/sequence.h                |  5 ++++
 apps/shared/expression_model_handle.cpp | 37 ++++++++++++++++++-------
 apps/shared/expression_model_handle.h   |  1 +
 4 files changed, 55 insertions(+), 10 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 0cb52c3a9..95f026c03 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -200,6 +200,20 @@ Poincare::Layout Sequence::SequenceHandle::name(Sequence * sequence) {
   return m_name;
 }
 
+void Sequence::SequenceHandle::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t newExpressionSize, size_t previousExpressionSize) {
+  Ion::Storage::Record::Data newData = record->value();
+  // Translate expressions located downstream
+  size_t sizeBeforeExpression = (char *)expressionAddress -(char *)newData.buffer;
+  size_t remainingSize = newData.size - sizeBeforeExpression - previousExpressionSize;
+  memmove((char *)expressionAddress + newExpressionSize, (char *)expressionAddress + previousExpressionSize, remainingSize);
+  // Copy the expression
+  if (!expressionToStore.isUninitialized()) {
+    memmove(expressionAddress, expressionToStore.addressInPool(), newExpressionSize);
+  }
+  // Update meta data
+  updateMetaData(record, newExpressionSize);
+}
+
 /* Definition Handle*/
 
 void * Sequence::DefinitionHandle::expressionAddress(const Ion::Storage::Record * record) const {
@@ -243,6 +257,10 @@ size_t Sequence::FirstInitialConditionHandle::expressionSize(const Ion::Storage:
   return static_cast<const Sequence *>(record)->recordData()->firstInitialConditionSize();
 }
 
+void Sequence::FirstInitialConditionHandle::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
+  static_cast<const Sequence *>(record)->recordData()->setFirstInitialConditionSize(newSize);
+}
+
 void Sequence::FirstInitialConditionHandle::buildName(Sequence * sequence) {
   assert(sequence->type() == Type::SingleRecurrence || sequence->type() == Type::DoubleRecurrence);
   char buffer[k_initialRankNumberOfDigits+1];
@@ -262,6 +280,10 @@ void * Sequence::SecondInitialConditionHandle::expressionAddress(const Ion::Stor
   return (char *)data.buffer+offset;
 }
 
+void Sequence::SecondInitialConditionHandle::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
+  static_cast<const Sequence *>(record)->recordData()->setSecondInitialConditionSize(newSize);
+}
+
 size_t Sequence::SecondInitialConditionHandle::expressionSize(const Ion::Storage::Record * record) const {
   return static_cast<const Sequence *>(record)->recordData()->secondInitialConditionSize();
 }
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 4192ca9f9..9a521c5fd 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -101,6 +101,9 @@ private:
   protected:
     virtual void buildName(Sequence * sequence) = 0;
     Poincare::Layout m_name;
+  private:
+    void updateNewDataWithExpression(Ion::Storage::Record * record, Poincare::Expression & newExpression, void * expressionAddress, size_t newExpressionSize, size_t previousExpressionSize) override;
+    virtual void updateMetaData(const Ion::Storage::Record * record, size_t newSize) {}
   };
 
   class DefinitionHandle : public SequenceHandle {
@@ -115,6 +118,7 @@ private:
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
+    void updateMetaData(const Ion::Storage::Record * record, size_t newSize) override;
     size_t expressionSize(const Ion::Storage::Record * record) const override;
     void buildName(Sequence * sequence) override;
   };
@@ -123,6 +127,7 @@ private:
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
+    void updateMetaData(const Ion::Storage::Record * record, size_t newSize) override;
     size_t expressionSize(const Ion::Storage::Record * record) const override;
     void buildName(Sequence * sequence) override;
   };
diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index 65ea9d96e..ae9697a99 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -11,6 +11,8 @@ using namespace Poincare;
 
 namespace Shared {
 
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
+
 ExpressionModelHandle::ExpressionModelHandle() :
   m_expression(),
   m_layout(),
@@ -68,30 +70,45 @@ Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(Ion::Storage
   return setExpressionContent(record, e);
 }
 
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ion::Storage::Record * record, Expression & expressionToStore) {
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ion::Storage::Record * record, Expression & newExpression) {
   assert(record->fullName() != nullptr);
-  // Prepare the new data to store
+  // Prepare the new data to be stored
   Ion::Storage::Record::Data newData = record->value();
-  size_t expressionToStoreSize = expressionToStore.isUninitialized() ? 0 : expressionToStore.size();
-  newData.size = newData.size - expressionSize(record) + expressionToStoreSize;
-
-  // Set the data
+  size_t previousExpressionSize = expressionSize(record);
+  size_t newExpressionSize = newExpression.isUninitialized() ? 0 : newExpression.size();
+  size_t previousDataSize = newData.size;
+  size_t newDataSize = previousDataSize - previousExpressionSize + newExpressionSize;
+  void * expAddress = expressionAddress(record);
+  // Update size of record to maximal size between previous and new data
+  newData.size = maxInt(previousDataSize, newDataSize);
   Ion::Storage::Record::ErrorStatus error = record->setValue(newData);
   if (error != Ion::Storage::Record::ErrorStatus::None) {
     assert(error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable);
     return error;
   }
+  // Prepare the new data content
+  /* WARNING: expressionAddress() cannot be used while the metadata is invalid
+   * (as it is sometimes computed from metadata). Thus, the expression address
+   * is given as a parameter to updateNewDataWithExpression. */
+  updateNewDataWithExpression(record, newExpression, expAddress, newExpressionSize, previousExpressionSize);
+  // Set the data with the right size
+  newData.size = newDataSize;
+  error = record->setValue(newData);
+  // Any error would have occured at the first call to setValue
+  assert(error == Ion::Storage::Record::ErrorStatus::None);
 
-  // Copy the expression if needed
-  if (!expressionToStore.isUninitialized()) {
-    memcpy(expressionAddress(record), expressionToStore.addressInPool(), expressionToStore.size());
-  }
   /* Here we delete only the elements relative to the expression model kept in
    * this handle. */
   tidy();
   return error;
 }
 
+void ExpressionModelHandle::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize) {
+  if (!expressionToStore.isUninitialized()) {
+    memmove(expressionAddress, expressionToStore.addressInPool(), expressionToStoreSize);
+  }
+}
+
 void ExpressionModelHandle::tidy() const {
   m_layout = Layout();
   m_expression = Expression();
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index 08f1accf2..0f60adaf7 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -34,6 +34,7 @@ protected:
   mutable Poincare::Expression m_expression;
   mutable Poincare::Layout m_layout;
 private:
+  virtual void updateNewDataWithExpression(Ion::Storage::Record * record, Poincare::Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize);
   virtual size_t expressionSize(const Ion::Storage::Record * record) const = 0;
   mutable int m_circular;
 };

From 4c1e4cd8f442a596d799a46769c853604a3c74ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 13:52:46 +0100
Subject: [PATCH 122/295] [sequence] Optimize size of Sequence meta data

---
 apps/sequence/sequence.h | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 9a521c5fd..abaa8a59f 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -14,7 +14,7 @@ namespace Sequence {
 class Sequence : public Shared::StorageFunction {
 friend class SequenceStore;
 public:
-  enum class Type {
+  enum class Type : uint8_t {
     Explicit = 0,
     SingleRecurrence = 1,
     DoubleRecurrence = 2
@@ -83,14 +83,15 @@ private:
     int initialRank() const { return m_initialRank; }
     void setInitialRank(int initialRank) { m_initialRank = initialRank; }
     size_t firstInitialConditionSize() const { return m_firstInitialConditionSize; }
-    void setFirstInitialConditionSize(size_t firstInitialConditionSize) { m_firstInitialConditionSize = firstInitialConditionSize; }
+    void setFirstInitialConditionSize(uint16_t firstInitialConditionSize) { m_firstInitialConditionSize = firstInitialConditionSize; }
     size_t secondInitialConditionSize() const { return m_secondInitialConditionSize; }
-    void setSecondInitialConditionSize(size_t secondInitialConditionSize) { m_secondInitialConditionSize = secondInitialConditionSize; }
+    void setSecondInitialConditionSize(uint16_t secondInitialConditionSize) { m_secondInitialConditionSize = secondInitialConditionSize; }
   private:
+    static_assert((1 << 8*sizeof(uint16_t)) > Ion::Storage::k_storageSize, "Potential overflows of Sequence initial condition sizes");
     Type m_type;
-    int m_initialRank;
-    size_t m_firstInitialConditionSize;
-    size_t m_secondInitialConditionSize;
+    uint8_t m_initialRank;
+    uint16_t m_firstInitialConditionSize;
+    uint16_t m_secondInitialConditionSize;
   };
 
   class SequenceHandle : public Shared::ExpressionModelHandle {

From dad5fc7f95241a2298c45f933bc27f3cad40fd07 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 16:33:14 +0100
Subject: [PATCH 123/295] [sequence] Make tests build

---
 apps/sequence/test/sequence.cpp | 46 ++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/apps/sequence/test/sequence.cpp b/apps/sequence/test/sequence.cpp
index 1f2f990b4..62fe4834b 100644
--- a/apps/sequence/test/sequence.cpp
+++ b/apps/sequence/test/sequence.cpp
@@ -10,6 +10,22 @@ using namespace Poincare;
 
 namespace Sequence {
 
+Sequence * addSequence(SequenceStore * store, Sequence::Type type, const char * definition, const char * condition1, const char * condition2) {
+  Ion::Storage::Record::ErrorStatus err = store->addEmptyModel();
+  assert(err == Ion::Storage::Record::ErrorStatus::None);
+  Ion::Storage::Record record = store->recordAtIndex(store->numberOfModels()-1);
+  Sequence * u = store->modelForRecord(record);
+  u->setType(type);
+  u->setContent(definition);
+  if (condition1) {
+    u->setFirstInitialConditionContent(condition1);
+  }
+  if (condition2) {
+    u->setSecondInitialConditionContent(condition2);
+  }
+  return u;
+}
+
 void check_sequences_defined_by(double result[2][10], Sequence::Type typeU, const char * definitionU, const char * conditionU1 = nullptr, const char * conditionU2 = nullptr, Sequence::Type typeV = Sequence::Type::Explicit, const char * definitionV = nullptr, const char * conditionV1 = nullptr, const char * conditionV2 = nullptr) {
   Shared::GlobalContext globalContext;
   SequenceStore store;
@@ -18,34 +34,17 @@ void check_sequences_defined_by(double result[2][10], Sequence::Type typeU, cons
   Sequence * u = nullptr;
   Sequence * v = nullptr;
   if (definitionU) {
-    u = static_cast<Sequence *>(store.addEmptyModel());
-    quiz_assert(u->name()[0] == 'u');
-    u->setType(typeU);
-    u->setContent(definitionU);
-    if (conditionU1) {
-      u->setFirstInitialConditionContent(conditionU1);
-    }
-    if (conditionU2) {
-      u->setSecondInitialConditionContent(conditionU2);
-    }
+    u = addSequence(&store, typeU, definitionU, conditionU1, conditionU2);
+    quiz_assert(u->fullName()[0] == 'u');
   }
   if (definitionV) {
     if (store.numberOfModels() == 0) {
-      Sequence * tempU = static_cast<Sequence *>(store.addEmptyModel());
-      v = static_cast<Sequence *>(store.addEmptyModel());
-      store.removeModel(tempU);
-      v = store.modelAtIndex(0);
+      Sequence * tempU = addSequence(&store, typeU, nullptr, nullptr, nullptr);
+      v = addSequence(&store, typeV, definitionV, conditionV1, conditionV2);
+      store.removeModel(*tempU);
     } else {
       quiz_assert(store.numberOfModels() == 1);
-      v = static_cast<Sequence *>(store.addEmptyModel());
-    }
-    v->setType(typeV);
-    v->setContent(definitionV);
-    if (conditionV1) {
-      v->setFirstInitialConditionContent(conditionV1);
-    }
-    if (conditionV2) {
-      v->setSecondInitialConditionContent(conditionV2);
+      v = addSequence(&store, typeV, definitionV, conditionV1, conditionV2);
     }
   }
   for (int j = 0; j < 10; j++) {
@@ -58,6 +57,7 @@ void check_sequences_defined_by(double result[2][10], Sequence::Type typeU, cons
       quiz_assert((std::isnan(vn) && std::isnan(result[1][j])) || (vn == result[1][j]));
     }
   }
+  store.removeAll();
 }
 
 QUIZ_CASE(sequence_evaluation) {

From be76784bb47c5afcbfa24c6b3317a15b3af11616 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 16:40:58 +0100
Subject: [PATCH 124/295] [sequence] Add
 Poincare::Symbol::SpecialSymbols::UnknownN used in Sequence

---
 apps/graph/storage_cartesian_function_store.h |  1 +
 apps/sequence/list/list_controller.cpp        |  2 ++
 apps/sequence/sequence.cpp                    | 10 ++++----
 apps/sequence/sequence.h                      |  2 +-
 apps/sequence/sequence_store.h                |  1 +
 apps/shared/expression_model_handle.cpp       |  8 +++----
 apps/shared/expression_model_handle.h         |  4 ++--
 apps/shared/single_expression_model_handle.h  |  5 ++--
 apps/shared/storage_cartesian_function.h      |  2 +-
 ...orage_expression_model_list_controller.cpp | 18 ++++++++++-----
 ...storage_expression_model_list_controller.h |  1 +
 apps/shared/storage_expression_model_store.h  |  2 ++
 apps/shared/storage_function.cpp              |  9 ++++----
 apps/shared/storage_function.h                |  7 +++---
 apps/shared/storage_function_store.h          |  1 -
 poincare/include/poincare/derivative.h        |  2 +-
 poincare/include/poincare/expression.h        |  4 ++--
 poincare/include/poincare/expression_node.h   |  2 +-
 poincare/include/poincare/integral.h          |  2 +-
 .../poincare/parametered_expression_helper.h  |  2 +-
 poincare/include/poincare/product.h           |  2 +-
 poincare/include/poincare/sum.h               |  2 +-
 poincare/include/poincare/symbol.h            | 12 +++++-----
 poincare/src/derivative.cpp                   |  4 ++--
 poincare/src/expression.cpp                   |  8 +++----
 poincare/src/expression_node.cpp              |  4 ++--
 poincare/src/integral.cpp                     |  4 ++--
 .../src/parametered_expression_helper.cpp     |  6 ++---
 poincare/src/product.cpp                      |  4 ++--
 poincare/src/sum.cpp                          |  4 ++--
 poincare/src/symbol.cpp                       | 23 +++++++++++--------
 poincare/src/symbol_abstract.cpp              |  1 +
 poincare/test/parser.cpp                      |  1 +
 33 files changed, 88 insertions(+), 72 deletions(-)

diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index f81cd49b5..ee786cfcb 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -12,6 +12,7 @@ class StorageCartesianFunctionStore : public Shared::StorageFunctionStore {
 public:
   Shared::ExpiringPointer<Shared::StorageCartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::StorageCartesianFunction>(static_cast<Shared::StorageCartesianFunction *>(privateModelForRecord(record))); }
   char symbol() const override { return Shared::StorageCartesianFunction::Symbol(); }
+  char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownX; }
 private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Shared::GlobalContext::funcExtension; }
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 80117dec1..61c52b8ff 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -104,6 +104,8 @@ void ListController::editExpression(int sequenceDefinition, Ion::Events::Event e
         break;
     }
     initialText = initialTextContent;
+    // Replace Poincare::Symbol::SpecialSymbols::UnknownN with 'n'
+    replaceUnknownSymbolWithReadableSymbol(initialText);
   }
   App * myApp = (App *)app();
   InputViewController * inputController = myApp->inputViewController();
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 95f026c03..ba4ecb7cb 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -77,7 +77,7 @@ Poincare::Layout Sequence::nameLayout() {
   if (m_nameLayout.isUninitialized()) {
     m_nameLayout = HorizontalLayout::Builder(
         CodePointLayout::Builder(fullName()[0], KDFont::SmallFont),
-        VerticalOffsetLayout::Builder(CodePointLayout::Builder(symbol(), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(CodePointLayout::Builder(Symbol(), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
       );
   }
   return m_nameLayout;
@@ -122,7 +122,7 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
   if (n < initialRank() || n < 0) {
     return NAN;
   }
-  char symb[] = {symbol(), 0};
+  const char unknownN[2] = {Poincare::Symbol::SpecialSymbols::UnknownN, 0};
   CacheContext<T> ctx = CacheContext<T>(sqctx);
   T un = sqctx->valueOfSequenceAtPreviousRank<T>(0, 0);
   T unm1 = sqctx->valueOfSequenceAtPreviousRank<T>(0, 1);
@@ -139,7 +139,7 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
     {
       ctx.setValueForSymbol(un, unSymbol);
       ctx.setValueForSymbol(vn, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)n, ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), unknownN, (T)n, ctx);
     }
     case Type::SingleRecurrence:
     {
@@ -150,7 +150,7 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
       ctx.setValueForSymbol(unm1, unSymbol);
       ctx.setValueForSymbol(vn, vn1Symbol);
       ctx.setValueForSymbol(vnm1, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)(n-1), ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), unknownN, (T)(n-1), ctx);
     }
     default:
     {
@@ -164,7 +164,7 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
       ctx.setValueForSymbol(unm2, unSymbol);
       ctx.setValueForSymbol(vnm1, vn1Symbol);
       ctx.setValueForSymbol(vnm2, vnSymbol);
-      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), symb, (T)(n-2), ctx);
+      return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(sqctx), unknownN, (T)(n-2), ctx);
     }
   }
 }
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index abaa8a59f..b6788ad6c 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -23,7 +23,6 @@ public:
     StorageFunction(record),
     m_nameLayout() {}
   static char Symbol() { return 'n'; }
-  char symbol() const override { return Symbol(); }
   void tidy() override;
   // MetaData getters
   Type type() const;
@@ -33,6 +32,7 @@ public:
   void setInitialRank(int rank);
   // Definition
   Poincare::Layout definitionName() { return m_definitionHandle.name(this); }
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableHandle()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownN); }
   // First initial condition
   Poincare::Layout firstInitialConditionName() { return m_firstInitialConditionHandle.name(this); }
   void firstInitialConditionText(char * buffer, size_t bufferSize) const { return m_firstInitialConditionHandle.text(this, buffer, bufferSize); }
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 2b5143cd6..383499e6a 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -13,6 +13,7 @@ class SequenceStore : public Shared::StorageFunctionStore {
 public:
   using Shared::StorageFunctionStore::StorageFunctionStore;
   char symbol() const override { return Sequence::Symbol(); }
+  char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownN; }
   /* Sequence Store hold all its Sequences in an array. The Sequence pointers
    * return by modelForRecord are therefore non-expirable. We choose to return
    * Sequence * instead of ExpiringPointer<Sequence>. */
diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index ae9697a99..c1c5674f6 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -65,8 +65,8 @@ Layout ExpressionModelHandle::layout(const Storage::Record * record) const {
   return m_layout;
 }
 
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(Ion::Storage::Record * record, const char * c, char symbol) {
-  Expression e = ExpressionModelHandle::BuildExpressionFromText(c, symbol);
+Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(Ion::Storage::Record * record, const char * c, char symbol, char unknownSymbol) {
+  Expression e = ExpressionModelHandle::BuildExpressionFromText(c, symbol, unknownSymbol);
   return setExpressionContent(record, e);
 }
 
@@ -115,14 +115,14 @@ void ExpressionModelHandle::tidy() const {
   m_circular = 0;
 }
 
-Poincare::Expression ExpressionModelHandle::BuildExpressionFromText(const char * c, char symbol) {
+Poincare::Expression ExpressionModelHandle::BuildExpressionFromText(const char * c, char symbol, char unknownSymbol) {
   Expression expressionToStore;
   // if c = "", we want to reinit the Expression
   if (c && *c != 0) {
     // Compute the expression to store, without replacing symbols
     expressionToStore = Expression::Parse(c);
     if (!expressionToStore.isUninitialized() && symbol != 0) {
-      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol));
+      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol), Symbol::Builder(unknownSymbol));
     }
   }
   return expressionToStore;
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index 0f60adaf7..dbfb98781 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -20,7 +20,7 @@ public:
   Poincare::Layout layout(const Ion::Storage::Record * record) const;
 
   // Setters
-  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0);
+  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0, char unknownSymbol = 0);
   Ion::Storage::Record::ErrorStatus setExpressionContent(Ion::Storage::Record * record, Poincare::Expression & e);
 
   // Property
@@ -30,7 +30,7 @@ public:
   virtual void tidy() const;
 protected:
   // Setters helper
-  static Poincare::Expression BuildExpressionFromText(const char * c, char symbol = 0);
+  static Poincare::Expression BuildExpressionFromText(const char * c, char symbol = 0, char unknownSymbol = 0);
   mutable Poincare::Expression m_expression;
   mutable Poincare::Layout m_layout;
 private:
diff --git a/apps/shared/single_expression_model_handle.h b/apps/shared/single_expression_model_handle.h
index 8590515ed..3700e0fd9 100644
--- a/apps/shared/single_expression_model_handle.h
+++ b/apps/shared/single_expression_model_handle.h
@@ -8,10 +8,9 @@ namespace Shared {
 
 class SingleExpressionModelHandle : public Ion::Storage::Record {
 public:
-  SingleExpressionModelHandle(Ion::Storage::Record record);
+  SingleExpressionModelHandle(Ion::Storage::Record record = Ion::Storage::Record());
 
   // Property
-  virtual char symbol() const { return 0; };
   void text(char * buffer, size_t bufferSize) const { return handle()->text(this, buffer, bufferSize); }
   Poincare::Expression expressionReduced(Poincare::Context * context) const { return handle()->expressionReduced(this, context); }
   Poincare::Expression expressionClone() const { return handle()->expressionClone(this); }
@@ -30,7 +29,7 @@ public:
    * behaviour but it is not true for its child classes (for example, in
    * Sequence). */
   virtual void tidy() { handle()->tidy(); }
-  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c, symbol()); }
+  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c); }
   Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableHandle()->setExpressionContent(this, e); }
 protected:
   bool isCircularlyDefined(Poincare::Context * context) const { return handle()->isCircularlyDefined(this, context); }
diff --git a/apps/shared/storage_cartesian_function.h b/apps/shared/storage_cartesian_function.h
index 0fb157e4d..e7a4d5439 100644
--- a/apps/shared/storage_cartesian_function.h
+++ b/apps/shared/storage_cartesian_function.h
@@ -11,11 +11,11 @@ class StorageCartesianFunction : public StorageFunction {
 public:
   static void DefaultName(char buffer[], size_t bufferSize);
   static char Symbol() { return 'x'; }
-  char symbol() const override { return Symbol(); };
   static StorageCartesianFunction NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName = nullptr);
   StorageCartesianFunction(Ion::Storage::Record record = Record()) :
     StorageFunction(record)
   {}
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableHandle()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownX); }
 
   // Derivative
   bool displayDerivative() const;
diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 95c88cc1c..1a823d9cb 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -213,6 +213,17 @@ void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPoin
   selectableTableView()->reloadData();
 }
 
+void StorageExpressionModelListController::replaceUnknownSymbolWithReadableSymbol(char * text) {
+  size_t textLength = strlen(text);
+  char unknownSymb = modelStore()->unknownSymbol();
+  char symb = modelStore()->symbol();
+  for (size_t i = 0; i < textLength; i++) {
+    if (unknownSymb != 0 && text[i] == unknownSymb) {
+      text[i] = symb;
+    }
+  }
+}
+
 void StorageExpressionModelListController::editExpression(Ion::Events::Event event) {
   char * initialText = nullptr;
   constexpr int initialTextContentMaxSize = Constant::MaxSerializedExpressionSize;
@@ -223,12 +234,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
     model->text(initialTextContent, initialTextContentMaxSize);
     initialText = initialTextContent;
     // Replace Poincare::Symbol::SpecialSymbols::UnknownX with 'x'
-    size_t initialTextLength = strlen(initialText);
-    for (size_t i = 0; i < initialTextLength; i++) {
-      if (initialTextContent[i] == Poincare::Symbol::SpecialSymbols::UnknownX) {
-        initialTextContent[i] = Poincare::Symbol::k_unknownXReadableChar;
-      }
-    }
+    replaceUnknownSymbolWithReadableSymbol(initialTextContent);
   }
   inputController()->edit(this, event, this, initialText,
       [](void * context, void * sender){
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index dd9b7107b..078aa9078 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -27,6 +27,7 @@ protected:
   virtual void didChangeModelsList() { resetMemoization(); }
   virtual void reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model);
   virtual void editExpression(Ion::Events::Event event);
+  void replaceUnknownSymbolWithReadableSymbol(char * initialText);
   virtual bool editSelectedRecordWithText(const char * text);
   virtual bool removeModelRow(Ion::Storage::Record record);
   virtual int modelIndexForRow(int j) { return j; }
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/storage_expression_model_store.h
index 41cb5115c..f5393e292 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/storage_expression_model_store.h
@@ -14,6 +14,8 @@ class StorageExpressionModelStore {
   // TODO find better name (once we remove ExpressionModelStore?)
 public:
   StorageExpressionModelStore();
+  virtual char symbol() const { return 0; }
+  virtual char unknownSymbol() const { return 0; }
 
   // Getters
   // By default, the number of models is not bounded
diff --git a/apps/shared/storage_function.cpp b/apps/shared/storage_function.cpp
index 3cd65fcbf..2af979fd6 100644
--- a/apps/shared/storage_function.cpp
+++ b/apps/shared/storage_function.cpp
@@ -1,7 +1,6 @@
 #include "storage_function.h"
 #include "poincare_helpers.h"
 #include <poincare/serialization_helper.h>
-#include <poincare/symbol.h>
 #include "poincare/src/parsing/parser.h"
 #include <ion/unicode/utf8_helper.h>
 #include <ion/unicode/utf8_decoder.h>
@@ -76,13 +75,13 @@ int StorageFunction::nameWithArgument(char * buffer, size_t bufferSize, char arg
 }
 
 template<typename T>
-T StorageFunction::templatedApproximateAtAbscissa(T x, Poincare::Context * context) const {
+T StorageFunction::templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const {
   if (isCircularlyDefined(context)) {
     return NAN;
   }
   constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownX[bufferSize];
-  Poincare::SerializationHelper::CodePoint(unknownX, bufferSize, Poincare::Symbol::UnknownX);
+  Poincare::SerializationHelper::CodePoint(unknownX, bufferSize, unknownSymbol);
   return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(context), unknownX, x, *context);
 }
 
@@ -94,5 +93,5 @@ StorageFunction::FunctionRecordData * StorageFunction::recordData() const {
 
 }
 
-template float Shared::StorageFunction::templatedApproximateAtAbscissa<float>(float, Poincare::Context*) const;
-template double Shared::StorageFunction::templatedApproximateAtAbscissa<double>(double, Poincare::Context*) const;
+template float Shared::StorageFunction::templatedApproximateAtAbscissa<float>(float, Poincare::Context*, char) const;
+template double Shared::StorageFunction::templatedApproximateAtAbscissa<double>(double, Poincare::Context*, char) const;
diff --git a/apps/shared/storage_function.h b/apps/shared/storage_function.h
index 9f8e50a19..047479735 100644
--- a/apps/shared/storage_function.h
+++ b/apps/shared/storage_function.h
@@ -2,6 +2,7 @@
 #define SHARED_STORAGE_FUNCTION_H
 
 #include <poincare/function.h>
+#include <poincare/symbol.h>
 #include "single_expression_model_handle.h"
 
 namespace Shared {
@@ -32,10 +33,10 @@ public:
 
   // Evaluation
   virtual float evaluateAtAbscissa(float x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context);
+    return templatedApproximateAtAbscissa(x, context, Poincare::Symbol::SpecialSymbols::UnknownX);
   }
   virtual double evaluateAtAbscissa(double x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context);
+    return templatedApproximateAtAbscissa(x, context, Poincare::Symbol::SpecialSymbols::UnknownX);
   }
   virtual double sumBetweenBounds(double start, double end, Poincare::Context * context) const = 0;
 protected:
@@ -57,7 +58,7 @@ protected:
     bool m_active;
   };
 private:
-  template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context) const;
+  template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const;
   FunctionRecordData * recordData() const;
 };
 
diff --git a/apps/shared/storage_function_store.h b/apps/shared/storage_function_store.h
index 767d9c173..7195a48a8 100644
--- a/apps/shared/storage_function_store.h
+++ b/apps/shared/storage_function_store.h
@@ -19,7 +19,6 @@ public:
 
   ExpiringPointer<StorageFunction> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<StorageFunction>(static_cast<StorageFunction *>(privateModelForRecord(record))); }
 
-  virtual char symbol() const = 0;
 };
 
 }
diff --git a/poincare/include/poincare/derivative.h b/poincare/include/poincare/derivative.h
index b4a76a19b..9cf6ee44f 100644
--- a/poincare/include/poincare/derivative.h
+++ b/poincare/include/poincare/derivative.h
@@ -25,7 +25,7 @@ public:
   // Properties
   Type type() const override { return Type::Derivative; }
   int polynomialDegree(Context & context, const char * symbolName) const override;
-  Expression replaceUnknown(const Symbol & symbol) override;
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   // Layout
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index 2e55c0543..20299e884 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -168,8 +168,8 @@ public:
   static constexpr int k_maxNumberOfPolynomialCoefficients = k_maxPolynomialDegree+1;
   int getPolynomialReducedCoefficients(const char * symbolName, Expression coefficients[], Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
   Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression) { return node()->replaceSymbolWithExpression(symbol, expression); }
-  Expression replaceUnknown(const Symbol & symbol);
-  Expression defaultReplaceUnknown(const Symbol & symbol);
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
+  Expression defaultReplaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
 
   /* Complex */
   static bool EncounteredComplex();
diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index 86ef3a646..fa9a924ad 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -116,7 +116,7 @@ public:
   virtual bool isNumber() const { return false; }
   virtual bool isRandom() const { return false; }
   /*!*/ virtual Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
-  /*!*/ virtual Expression replaceUnknown(const Symbol & symbol);
+  /*!*/ virtual Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
   /*!*/ virtual Expression setSign(Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
   virtual int polynomialDegree(Context & context, const char * symbolName) const;
   /*!*/ virtual int getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const;
diff --git a/poincare/include/poincare/integral.h b/poincare/include/poincare/integral.h
index 241521fc2..196ee6359 100644
--- a/poincare/include/poincare/integral.h
+++ b/poincare/include/poincare/integral.h
@@ -21,7 +21,7 @@ public:
   // ExpressionNode
   Type type() const override { return Type::Integral; }
   int polynomialDegree(Context & context, const char * symbolName) const override;
-  Expression replaceUnknown(const Symbol & symbol) override;
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
   // Complex
   bool isReal(Context & context) const override { return true; }
diff --git a/poincare/include/poincare/parametered_expression_helper.h b/poincare/include/poincare/parametered_expression_helper.h
index d56888026..5198f8636 100644
--- a/poincare/include/poincare/parametered_expression_helper.h
+++ b/poincare/include/poincare/parametered_expression_helper.h
@@ -20,7 +20,7 @@ namespace ParameteredExpressionHelper {
    * unknowns: for instance, we want to change f(x)=diff(cos(x),x,x) into
    * f(X)=diff(cos(x),x,X), X being an unknown. ReplaceUnknownInExpression does
    * that. */
-  Expression ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace);
+  Expression ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace, const Symbol & unknownSymbols);
 };
 
 }
diff --git a/poincare/include/poincare/product.h b/poincare/include/poincare/product.h
index c9dbaeb66..578f3ffe0 100644
--- a/poincare/include/poincare/product.h
+++ b/poincare/include/poincare/product.h
@@ -16,7 +16,7 @@ public:
 #endif
 
   Type type() const override { return Type::Product; }
-  Expression replaceUnknown(const Symbol & symbol) override;
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   float emptySequenceValue() const override { return 1.0f; }
diff --git a/poincare/include/poincare/sum.h b/poincare/include/poincare/sum.h
index 4256a18c5..81b549d52 100644
--- a/poincare/include/poincare/sum.h
+++ b/poincare/include/poincare/sum.h
@@ -16,7 +16,7 @@ public:
 #endif
 
   Type type() const override { return Type::Sum; }
-  Expression replaceUnknown(const Symbol & symbol) override;
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   float emptySequenceValue() const override { return 0.0f; }
diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index f608cb053..3763c722f 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -22,7 +22,7 @@ public:
   // Expression Properties
   Type type() const override { return Type::Symbol; }
   Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression) override;
-  Expression replaceUnknown(const Symbol & symbol) override;
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
   int polynomialDegree(Context & context, const char * symbolName) const override;
   int getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const override;
   int getVariables(Context & context, isVariableTest isVariable, char * variables, int maxSizeVariable) const override;
@@ -43,12 +43,12 @@ public:
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
 
+  bool isUnknown(char unknownSymbol) const;
 private:
   char m_name[0]; // MUST be the last member variable
 
   size_t nodeSize() const override { return sizeof(SymbolNode); }
   template<typename T> Evaluation<T> templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
-  bool isUnknownX() const;
 };
 
 class Symbol final : public SymbolAbstract {
@@ -58,11 +58,11 @@ class Symbol final : public SymbolAbstract {
 public:
   static constexpr int k_ansLength = 3;
   static constexpr char k_ans[k_ansLength+1] = "ans";
-  static constexpr CodePoint k_unknownXReadableChar = 'x';
   enum SpecialSymbols : char {
     /* We can use characters from 1 to 31 as they do not correspond to usual
      * characters but events as 'end of text', 'backspace'... */
-    UnknownX = 1 //TODO LEA make sure there is no collision with the code points
+    UnknownX = 1, //TODO LEA make sure there is no collision with the code points
+    UnknownN = 2 //TODO LEA make sure there is no collision with the code points,
   };
   Symbol(const SymbolNode * node) : SymbolAbstract(node) {}
   static Symbol Builder(const char * name, int length) { return SymbolAbstract::Builder<Symbol, SymbolNode>(name, length); }
@@ -71,14 +71,14 @@ public:
   static Expression UntypedBuilder(const char * name, size_t length, Context * context);
 
   // Symbol properties
-  bool isSystemSymbol() const { return name()[0] == SpecialSymbols::UnknownX && name()[1] == 0; }
+  bool isSystemSymbol() const { return node()->isUnknown(Symbol::SpecialSymbols::UnknownX) || node()->isUnknown(Symbol::SpecialSymbols::UnknownN); }
   static bool isSeriesSymbol(const char * c);
   static bool isRegressionSymbol(const char * c);
 
   // Expression
   Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
   Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
-  Expression replaceUnknown(const Symbol & symbol);
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
   int getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const;
   Expression shallowReplaceReplaceableSymbols(Context & context);
 private:
diff --git a/poincare/src/derivative.cpp b/poincare/src/derivative.cpp
index cb6f1de12..1c1d66a3e 100644
--- a/poincare/src/derivative.cpp
+++ b/poincare/src/derivative.cpp
@@ -27,8 +27,8 @@ int DerivativeNode::polynomialDegree(Context & context, const char * symbolName)
   return ExpressionNode::polynomialDegree(context, symbolName);
 }
 
-Expression DerivativeNode::replaceUnknown(const Symbol & symbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Derivative(this), symbol);
+Expression DerivativeNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Derivative(this), symbol, unknownSymbol);
 }
 
 Layout DerivativeNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 6702e3f4b..147304004 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -336,14 +336,14 @@ int Expression::getPolynomialReducedCoefficients(const char * symbolName, Expres
   return degree;
 }
 
-Expression Expression::replaceUnknown(const Symbol & symbol) {
-  return node()->replaceUnknown(symbol);
+Expression Expression::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return node()->replaceUnknown(symbol, unknownSymbol);
 }
 
-Expression Expression::defaultReplaceUnknown(const Symbol & symbol) {
+Expression Expression::defaultReplaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
   int nbChildren = numberOfChildren();
   for (int i = 0; i < nbChildren; i++) {
-    childAtIndex(i).replaceUnknown(symbol);
+    childAtIndex(i).replaceUnknown(symbol, unknownSymbol);
   }
   return *this;
 }
diff --git a/poincare/src/expression_node.cpp b/poincare/src/expression_node.cpp
index b87fbf347..b62f1f916 100644
--- a/poincare/src/expression_node.cpp
+++ b/poincare/src/expression_node.cpp
@@ -18,8 +18,8 @@ Expression ExpressionNode::replaceSymbolWithExpression(const SymbolAbstract & sy
   return Expression(this).defaultReplaceSymbolWithExpression(symbol, expression);
 }
 
-Expression ExpressionNode::replaceUnknown(const Symbol & symbol) {
-  return Expression(this).defaultReplaceUnknown(symbol);
+Expression ExpressionNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return Expression(this).defaultReplaceUnknown(symbol, unknownSymbol);
 }
 
 Expression ExpressionNode::setSign(Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
diff --git a/poincare/src/integral.cpp b/poincare/src/integral.cpp
index 96c565d87..1b62e05a3 100644
--- a/poincare/src/integral.cpp
+++ b/poincare/src/integral.cpp
@@ -29,8 +29,8 @@ int IntegralNode::polynomialDegree(Context & context, const char * symbolName) c
   return ExpressionNode::polynomialDegree(context, symbolName);
 }
 
-Expression IntegralNode::replaceUnknown(const Symbol & symbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Integral(this), symbol);
+Expression IntegralNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Integral(this), symbol, unknownSymbol);
 }
 
 Layout IntegralNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
diff --git a/poincare/src/parametered_expression_helper.cpp b/poincare/src/parametered_expression_helper.cpp
index 944003c16..07f4acb4e 100644
--- a/poincare/src/parametered_expression_helper.cpp
+++ b/poincare/src/parametered_expression_helper.cpp
@@ -5,7 +5,7 @@
 
 namespace Poincare {
 
-Expression ParameteredExpressionHelper::ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace) {
+Expression ParameteredExpressionHelper::ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace, const Symbol & unknownSymbol) {
   assert(!e.isUninitialized());
   assert(e.type() == ExpressionNode::Type::Integral
       || e.type() == ExpressionNode::Type::Derivative
@@ -22,10 +22,10 @@ Expression ParameteredExpressionHelper::ReplaceUnknownInExpression(Expression e,
 
   Symbol& parameterChild = static_cast<Symbol &>(child1);
   if (strcmp(parameterChild.name(), symbolToReplace.name()) != 0) {
-    return e.defaultReplaceUnknown(symbolToReplace);
+    return e.defaultReplaceUnknown(symbolToReplace, unknownSymbol);
   }
   for (int i = 2; i < numberOfChildren; i++) {
-    e.childAtIndex(i).replaceUnknown(symbolToReplace);
+    e.childAtIndex(i).replaceUnknown(symbolToReplace, unknownSymbol);
   }
   return e;
 }
diff --git a/poincare/src/product.cpp b/poincare/src/product.cpp
index ff6d7a8e0..551c97a70 100644
--- a/poincare/src/product.cpp
+++ b/poincare/src/product.cpp
@@ -14,8 +14,8 @@ namespace Poincare {
 
 constexpr Expression::FunctionHelper Product::s_functionHelper;
 
-Expression ProductNode::replaceUnknown(const Symbol & symbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Product(this), symbol);
+Expression ProductNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Product(this), symbol, unknownSymbol);
 }
 
 Layout ProductNode::createSequenceLayout(Layout argumentLayout, Layout symbolLayout, Layout subscriptLayout, Layout superscriptLayout) const {
diff --git a/poincare/src/sum.cpp b/poincare/src/sum.cpp
index 549cfdba9..d83cf506c 100644
--- a/poincare/src/sum.cpp
+++ b/poincare/src/sum.cpp
@@ -14,8 +14,8 @@ namespace Poincare {
 
 constexpr Expression::FunctionHelper Sum::s_functionHelper;
 
-Expression SumNode::replaceUnknown(const Symbol & symbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Sum(this), symbol);
+Expression SumNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Sum(this), symbol, unknownSymbol);
 }
 
 Layout SumNode::createSequenceLayout(Layout argumentLayout, Layout symbolLayout, Layout subscriptLayout, Layout superscriptLayout) const {
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 52ef984ea..6074089bc 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -14,7 +14,6 @@
 namespace Poincare {
 
 constexpr char Symbol::k_ans[];
-constexpr CodePoint Symbol::k_unknownXReadableChar;
 
 SymbolNode::SymbolNode(const char * newName, int length) : SymbolAbstractNode() {
   strlcpy(const_cast<char*>(name()), newName, length+1);
@@ -24,8 +23,8 @@ Expression SymbolNode::replaceSymbolWithExpression(const SymbolAbstract & symbol
   return Symbol(this).replaceSymbolWithExpression(symbol, expression);
 }
 
-Expression SymbolNode::replaceUnknown(const Symbol & symbol) {
-  return Symbol(this).replaceUnknown(symbol);
+Expression SymbolNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return Symbol(this).replaceUnknown(symbol, unknownSymbol);
 }
 
 int SymbolNode::polynomialDegree(Context & context, const char * symbolName) const {
@@ -67,7 +66,7 @@ int SymbolNode::getVariables(Context & context, isVariableTest isVariable, char
 }
 
 float SymbolNode::characteristicXRange(Context & context, Preferences::AngleUnit angleUnit) const {
-  return isUnknownX() ? NAN : 0.0f;
+  return isUnknown(Symbol::SpecialSymbols::UnknownX) ? NAN : 0.0f;
 }
 
 bool SymbolNode::isReal(Context & context) const {
@@ -76,8 +75,11 @@ bool SymbolNode::isReal(Context & context) const {
 }
 
 Layout SymbolNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  if (isUnknownX()) {
-    return CodePointLayout::Builder(Symbol::k_unknownXReadableChar);
+  if (isUnknown(Symbol::SpecialSymbols::UnknownX)) {
+    return CodePointLayout::Builder('x');
+  }
+  if (isUnknown(Symbol::SpecialSymbols::UnknownN)) {
+    return CodePointLayout::Builder('n');
   }
   // TODO return Parse(m_name).createLayout() ?
   if (strcmp(m_name, "u(n)") == 0) {
@@ -145,8 +147,8 @@ Expression Symbol::UntypedBuilder(const char * name, size_t length, Context * co
   return Expression();
 }
 
-bool SymbolNode::isUnknownX() const {
-  bool result = UTF8Helper::CodePointIs(m_name, Symbol::SpecialSymbols::UnknownX);
+bool SymbolNode::isUnknown(char unknownSymbol) const {
+  bool result = UTF8Helper::CodePointIs(m_name, unknownSymbol);
   if (result) {
     assert(m_name[1] == 0);
   }
@@ -193,10 +195,11 @@ Expression Symbol::replaceSymbolWithExpression(const SymbolAbstract & symbol, co
   return *this;
 }
 
-Expression Symbol::replaceUnknown(const Symbol & symbol) {
+Expression Symbol::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
   assert(!symbol.isUninitialized());
   assert(symbol.type() == ExpressionNode::Type::Symbol);
-  return replaceSymbolWithExpression(symbol, Symbol::Builder(SpecialSymbols::UnknownX));
+  assert(unknownSymbol.type() == ExpressionNode::Type::Symbol);
+  return replaceSymbolWithExpression(symbol, unknownSymbol);
 }
 
 int Symbol::getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const {
diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index 5ac3f5546..27f53ffce 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -65,6 +65,7 @@ Expression SymbolAbstract::Expand(const SymbolAbstract & symbol, Context & conte
    * symbols are defined circularly. */
   e = Expression::ExpressionWithoutSymbols(e, context);
   if (!e.isUninitialized() && isFunction) {
+    // TODO: when SequenceFunction is created, we want to specify which unknown variable to replace (UnknownX or UnknownN)
     e = e.replaceSymbolWithExpression(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), symbol.childAtIndex(0));
   }
   return e;
diff --git a/poincare/test/parser.cpp b/poincare/test/parser.cpp
index 136b54165..7779d030a 100644
--- a/poincare/test/parser.cpp
+++ b/poincare/test/parser.cpp
@@ -350,6 +350,7 @@ QUIZ_CASE(poincare_parser_parse_store) {
   assert_raises_parsing_error("1→𝐢");
   assert_raises_parsing_error("1→ℯ");
   assert_raises_parsing_error("1→\1"); // UnknownX
+  assert_raises_parsing_error("1→\2"); // UnknownN
   assert_raises_parsing_error("1→acos");
   assert_raises_parsing_error("1→f(2)");
   assert_raises_parsing_error("1→f(f)");

From 15a4072fdcc83e9585fd17a58cb83e40c43b6fe3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 17:00:40 +0100
Subject: [PATCH 125/295] [ion] Move Storage extensions declaration in  Storage
 class

---
 apps/graph/list/storage_list_controller.cpp   |  4 ++--
 apps/graph/storage_cartesian_function_store.h |  2 +-
 apps/sequence/sequence_store.cpp              |  2 +-
 apps/sequence/sequence_store.h                |  2 +-
 apps/shared/global_context.cpp                | 22 ++++++++-----------
 apps/shared/global_context.h                  |  5 +----
 apps/shared/storage_cartesian_function.cpp    |  4 ++--
 apps/solver/equation.cpp                      |  2 --
 apps/solver/equation.h                        |  1 -
 apps/solver/equation_store.cpp                |  4 ++--
 apps/solver/equation_store.h                  |  2 +-
 apps/variable_box_controller.cpp              |  6 ++---
 ion/include/ion/storage.h                     |  7 +++++-
 ion/src/shared/storage.cpp                    |  7 +++++-
 14 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/apps/graph/list/storage_list_controller.cpp b/apps/graph/list/storage_list_controller.cpp
index da9f23889..6beb1cd82 100644
--- a/apps/graph/list/storage_list_controller.cpp
+++ b/apps/graph/list/storage_list_controller.cpp
@@ -64,11 +64,11 @@ bool StorageListController::textFieldDidFinishEditing(TextField * textField, con
   }
 
   // Delete any variable with the same name
-  GlobalContext::DestroyRecordsBaseNamedWithoutExtension(baseName, GlobalContext::funcExtension /*TODO store elsewhere?*/);
+  GlobalContext::DestroyRecordsBaseNamedWithoutExtension(baseName, Ion::Storage::funcExtension);
 
   // Set the name
   StorageFunction::NameNotCompliantError nameError = StorageFunction::NameNotCompliantError::None;
-  Ion::Storage::Record::ErrorStatus error = StorageFunction::BaseNameCompliant(baseName, &nameError) ? modelStore()->recordAtIndex(m_selectableTableView.selectedRow()).setBaseNameWithExtension(baseName, GlobalContext::funcExtension /*TODO store elsewhere?*/) : Ion::Storage::Record::ErrorStatus::NonCompliantName;
+  Ion::Storage::Record::ErrorStatus error = StorageFunction::BaseNameCompliant(baseName, &nameError) ? modelStore()->recordAtIndex(m_selectableTableView.selectedRow()).setBaseNameWithExtension(baseName, Ion::Storage::funcExtension) : Ion::Storage::Record::ErrorStatus::NonCompliantName;
 
   // Handle any error
   if (error == Ion::Storage::Record::ErrorStatus::None) {
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index ee786cfcb..0f21a9cf1 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -15,7 +15,7 @@ public:
   char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownX; }
 private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
-  const char * modelExtension() const override { return Shared::GlobalContext::funcExtension; }
+  const char * modelExtension() const override { return Ion::Storage::funcExtension; }
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
   Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
   mutable Shared::StorageCartesianFunction m_functions[k_maxNumberOfMemoizedModels];
diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 718a3e3d3..6ede5a26a 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -14,7 +14,7 @@ const char * SequenceStore::firstAvailableName(int * nameIndex) {
   int currentNameIndex = 0;
   while (currentNameIndex < MaxNumberOfSequences) {
     const char * name = k_sequenceNames[currentNameIndex];
-    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Shared::GlobalContext::seqExtension).isNull()) {
+    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Ion::Storage::seqExtension).isNull()) {
       if (nameIndex) {
         *nameIndex = currentNameIndex;
       }
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 383499e6a..3db947705 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -30,7 +30,7 @@ public:
   };
 
 private:
-  const char * modelExtension() const override { return Shared::GlobalContext::seqExtension; }
+  const char * modelExtension() const override { return Ion::Storage::seqExtension; }
   /* We don't really use model memoization as the number of Sequence is limited
    * and we keep enough Sequences to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
diff --git a/apps/shared/global_context.cpp b/apps/shared/global_context.cpp
index 48386b2a5..9904d433d 100644
--- a/apps/shared/global_context.cpp
+++ b/apps/shared/global_context.cpp
@@ -10,9 +10,6 @@ using namespace Poincare;
 
 namespace Shared {
 
-constexpr char GlobalContext::expExtension[];
-constexpr char GlobalContext::funcExtension[];
-constexpr char GlobalContext::seqExtension[];
 constexpr const char * GlobalContext::k_extensions[];
 
 bool GlobalContext::SymbolAbstractNameIsFree(const char * baseName) {
@@ -23,10 +20,10 @@ Poincare::Expression GlobalContext::ExpressionFromRecord(Ion::Storage::Record re
   if (record.isNull() || record.value().size == 0) {
     return Expression();
   }
-  if (Ion::Storage::FullNameHasExtension(record.fullName(), expExtension, strlen(expExtension))) {
+  if (Ion::Storage::FullNameHasExtension(record.fullName(), Ion::Storage::expExtension, strlen(Ion::Storage::expExtension))) {
     return ExpressionFromSymbolRecord(record);
   }
-  assert(Ion::Storage::FullNameHasExtension(record.fullName(), funcExtension, strlen(funcExtension)));
+  assert(Ion::Storage::FullNameHasExtension(record.fullName(), Ion::Storage::funcExtension, strlen(Ion::Storage::funcExtension)));
   return ExpressionFromFunctionRecord(record);
 }
 
@@ -34,7 +31,7 @@ Poincare::Expression GlobalContext::ExpressionFromSymbolRecord(Ion::Storage::Rec
   if (record.isNull() || record.value().size == 0) {
     return Expression();
   }
-  assert(Ion::Storage::FullNameHasExtension(record.fullName(), expExtension, strlen(expExtension)));
+  assert(Ion::Storage::FullNameHasExtension(record.fullName(), Ion::Storage::expExtension, strlen(Ion::Storage::expExtension)));
   // An expression record value is the expression itself
   Ion::Storage::Record::Data d = record.value();
   return Expression::ExpressionFromAddress(d.buffer, d.size);
@@ -43,7 +40,7 @@ Poincare::Expression GlobalContext::ExpressionFromFunctionRecord(Ion::Storage::R
   if (record.isNull() || record.value().size == 0) {
     return Expression();
   }
-  if (!Ion::Storage::FullNameHasExtension(record.fullName(), funcExtension, strlen(funcExtension))) {
+  if (!Ion::Storage::FullNameHasExtension(record.fullName(), Ion::Storage::funcExtension, strlen(Ion::Storage::funcExtension))) {
     return Expression();
   }
   /* An function record value has metadata before the expression. To get the
@@ -94,7 +91,7 @@ const Expression GlobalContext::ExpressionForSymbolAndRecord(const SymbolAbstrac
 
 const Expression GlobalContext::ExpressionForActualSymbol(const SymbolAbstract & symbol, Ion::Storage::Record r) {
   assert(symbol.type() == ExpressionNode::Type::Symbol);
-  if (r.isNull() || !Ion::Storage::FullNameHasExtension(r.fullName(), expExtension, strlen(expExtension))) {
+  if (r.isNull() || !Ion::Storage::FullNameHasExtension(r.fullName(), Ion::Storage::expExtension, strlen(Ion::Storage::expExtension))) {
     return Expression();
   }
   // Look up the file system for symbol
@@ -102,7 +99,7 @@ const Expression GlobalContext::ExpressionForActualSymbol(const SymbolAbstract &
 }
 
 Ion::Storage::Record::ErrorStatus GlobalContext::SetExpressionForActualSymbol(const Expression & expression, const SymbolAbstract & symbol, Ion::Storage::Record previousRecord) {
-  if (!previousRecord.isNull() && Ion::Storage::FullNameHasExtension(previousRecord.fullName(), funcExtension, strlen(funcExtension))) {
+  if (!previousRecord.isNull() && Ion::Storage::FullNameHasExtension(previousRecord.fullName(), Ion::Storage::funcExtension, strlen(Ion::Storage::funcExtension))) {
     /* A function can overwrite a variable, but a variable cannot be created if
      * it has the same name as an existing function. */
     // TODO Pop up "Name taken for a function"
@@ -110,13 +107,13 @@ Ion::Storage::Record::ErrorStatus GlobalContext::SetExpressionForActualSymbol(co
   }
   // Delete any record with same name (as it is going to be overriden)
   previousRecord.destroy();
-  return Ion::Storage::sharedStorage()->createRecordWithExtension(symbol.name(), expExtension, expression.addressInPool(), expression.size());
+  return Ion::Storage::sharedStorage()->createRecordWithExtension(symbol.name(), Ion::Storage::expExtension, expression.addressInPool(), expression.size());
 }
 
 Ion::Storage::Record::ErrorStatus GlobalContext::SetExpressionForFunctionRecord(Expression expressionToStore, Ion::Storage::Record previousRecord, const char * baseName) {
   Ion::Storage::Record recordToSet = previousRecord;
   Ion::Storage::Record::ErrorStatus error = Ion::Storage::Record::ErrorStatus::None;
-  if (!Ion::Storage::FullNameHasExtension(previousRecord.fullName(), funcExtension, strlen(funcExtension))) {
+  if (!Ion::Storage::FullNameHasExtension(previousRecord.fullName(), Ion::Storage::funcExtension, strlen(Ion::Storage::funcExtension))) {
     // The previous record was not a function. Destroy it and create the new record.
     previousRecord.destroy();
     StorageCartesianFunction newModel = StorageCartesianFunction::NewModel(&error, baseName);
@@ -134,8 +131,7 @@ Ion::Storage::Record::ErrorStatus GlobalContext::SetExpressionForFunction(const
 }
 
 Ion::Storage::Record GlobalContext::SymbolAbstractRecordWithBaseName(const char * name) {
-  const char * extensions[2] = {expExtension, funcExtension/*, seqExtension*/};
-  return Ion::Storage::sharedStorage()->recordBaseNamedWithExtensions(name, extensions, 2);
+  return Ion::Storage::sharedStorage()->recordBaseNamedWithExtensions(name, k_extensions, k_numberOfExtensions);
 }
 
 }
diff --git a/apps/shared/global_context.h b/apps/shared/global_context.h
index 10a0c8d09..617eca3c5 100644
--- a/apps/shared/global_context.h
+++ b/apps/shared/global_context.h
@@ -14,10 +14,7 @@ namespace Shared {
 class GlobalContext final : public Poincare::Context {
 public:
   static constexpr int k_numberOfExtensions = 2;
-  static constexpr char expExtension[] = "exp"; // TODO: store this elsewhere?
-  static constexpr char funcExtension[] = "func"; // TODO: store this elsewhere?
-  static constexpr const char * k_extensions[] = {expExtension, funcExtension};
-  static constexpr char seqExtension[] = "seq";
+  static constexpr const char * k_extensions[] = {Ion::Storage::expExtension, Ion::Storage::funcExtension};
 
   // Storage information
   static bool SymbolAbstractNameIsFree(const char * baseName);
diff --git a/apps/shared/storage_cartesian_function.cpp b/apps/shared/storage_cartesian_function.cpp
index ad76296f0..4ce38c7fe 100644
--- a/apps/shared/storage_cartesian_function.cpp
+++ b/apps/shared/storage_cartesian_function.cpp
@@ -53,7 +53,7 @@ StorageCartesianFunction StorageCartesianFunction::NewModel(Ion::Storage::Record
     DefaultName(nameBuffer, SymbolAbstract::k_maxNameSize);
     baseName = nameBuffer;
   }
-  *error = Ion::Storage::sharedStorage()->createRecordWithExtension(baseName, GlobalContext::funcExtension, &data, sizeof(data));
+  *error = Ion::Storage::sharedStorage()->createRecordWithExtension(baseName, Ion::Storage::funcExtension, &data, sizeof(data));
 
   // Return if error
   if (*error != Ion::Storage::Record::ErrorStatus::None) {
@@ -61,7 +61,7 @@ StorageCartesianFunction StorageCartesianFunction::NewModel(Ion::Storage::Record
   }
 
   // Return the StorageCartesianFunction withthe new record
-  return StorageCartesianFunction(Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(baseName, GlobalContext::funcExtension));
+  return StorageCartesianFunction(Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(baseName, Ion::Storage::funcExtension));
 }
 
 int StorageCartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg) {
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 7352ba583..52041e04e 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -12,8 +12,6 @@ using namespace Shared;
 
 namespace Solver {
 
-constexpr char Equation::extension[];
-
 Equation::Equation(Ion::Storage::Record record) :
   SingleExpressionModelHandle(record)
 {
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index 6db7e8249..65bda4052 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -14,7 +14,6 @@ public:
   Poincare::Expression standardForm(Poincare::Context * context) const { return m_handle.standardForm(this, context); }
   bool containsIComplex(Poincare::Context * context) const;
 
-  static constexpr char extension[] = "eq"; // TODO: store this elsewhere?
 private:
   class Handle : public Shared::ExpressionModelHandle {
   public:
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index 3cbe557bd..be1491cf5 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -35,13 +35,13 @@ Ion::Storage::Record::ErrorStatus EquationStore::addEmptyModel() {
   int currentNumber = 0;
   while (currentNumber < k_maxNumberOfEquations) {
     name[1] = '0'+currentNumber;
-    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Equation::extension).isNull()) {
+    if (Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(name, Ion::Storage::eqExtension).isNull()) {
       break;
     }
     currentNumber++;
   }
   assert(currentNumber < k_maxNumberOfEquations);
-  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, Equation::extension, nullptr, 0);
+  return Ion::Storage::sharedStorage()->createRecordWithExtension(name, Ion::Storage::eqExtension, nullptr, 0);
 }
 
 void EquationStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
diff --git a/apps/solver/equation_store.h b/apps/solver/equation_store.h
index 2d03d4a05..835da0ec2 100644
--- a/apps/solver/equation_store.h
+++ b/apps/solver/equation_store.h
@@ -78,7 +78,7 @@ private:
   static constexpr int k_maxNumberOfEquations = Poincare::Expression::k_maxNumberOfVariables; // Enable the same number of equations as the number of unknown variables
 
   // StorageExpressionModelStore
-  const char * modelExtension() const override { return Equation::extension; }
+  const char * modelExtension() const override { return Ion::Storage::eqExtension; }
   /* We don't really use model memoization as the number of Equation is limited
    * and we keep enough Equations to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index e27c06a23..086947b52 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -77,9 +77,9 @@ int VariableBoxController::numberOfRows() {
     case Page::RootMenu:
       return k_numberOfMenuRows;
     case Page::Expression:
-      return Storage::sharedStorage()->numberOfRecordsWithExtension(GlobalContext::expExtension);
+      return Storage::sharedStorage()->numberOfRecordsWithExtension(Ion::Storage::expExtension);
     case Page::Function:
-      return Storage::sharedStorage()->numberOfRecordsWithExtension(GlobalContext::funcExtension);
+      return Storage::sharedStorage()->numberOfRecordsWithExtension(Ion::Storage::funcExtension);
     default:
       return 0;
   }
@@ -243,7 +243,7 @@ Layout VariableBoxController::expressionLayoutForRecord(Storage::Record record,
 
 const char * VariableBoxController::extension() const {
   assert(m_currentPage != Page::RootMenu);
-  return m_currentPage == Page::Function ? GlobalContext::funcExtension : GlobalContext::expExtension;
+  return m_currentPage == Page::Function ? Ion::Storage::funcExtension : Ion::Storage::expExtension;
 }
 
 Storage::Record VariableBoxController::recordAtIndex(int rowIndex) {
diff --git a/ion/include/ion/storage.h b/ion/include/ion/storage.h
index 26867768c..403c4d186 100644
--- a/ion/include/ion/storage.h
+++ b/ion/include/ion/storage.h
@@ -20,6 +20,11 @@ public:
   static Storage * sharedStorage();
   constexpr static char k_dotChar = '.';
 
+  static constexpr char eqExtension[] = "eq";
+  static constexpr char expExtension[] = "exp";
+  static constexpr char funcExtension[] = "func";
+  static constexpr char seqExtension[] = "seq";
+
   class Record {
     /* A Record is identified by the CRC32 on its fullName because:
      * - A record is identified by its fullName, which is unique
@@ -103,7 +108,7 @@ public:
   Record recordWithExtensionAtIndex(const char * extension, int index);
   Record recordNamed(const char * fullName);
   Record recordBaseNamedWithExtension(const char * baseName, const char * extension);
-  Record recordBaseNamedWithExtensions(const char * baseName, const char * extension[], size_t numberOfExtensions);
+  Record recordBaseNamedWithExtensions(const char * baseName, const char * const extension[], size_t numberOfExtensions);
 
   // Record destruction
   void destroyAllRecords();
diff --git a/ion/src/shared/storage.cpp b/ion/src/shared/storage.cpp
index 7e007851f..0ad38552f 100644
--- a/ion/src/shared/storage.cpp
+++ b/ion/src/shared/storage.cpp
@@ -22,6 +22,11 @@ namespace Ion {
 
 uint32_t staticStorageArea[sizeof(Storage)/sizeof(uint32_t)] = {0};
 
+constexpr char Storage::expExtension[];
+constexpr char Storage::funcExtension[];
+constexpr char Storage::seqExtension[];
+constexpr char Storage::eqExtension[];
+
 Storage * Storage::sharedStorage() {
   static Storage * storage = nullptr;
   if (storage == nullptr) {
@@ -220,7 +225,7 @@ Storage::Record Storage::recordBaseNamedWithExtension(const char * baseName, con
   return recordBaseNamedWithExtensions(baseName, extensions, 1);
 }
 
-Storage::Record Storage::recordBaseNamedWithExtensions(const char * baseName, const char * extensions[], size_t numberOfExtensions) {
+Storage::Record Storage::recordBaseNamedWithExtensions(const char * baseName, const char * const extensions[], size_t numberOfExtensions) {
   size_t nameLength = strlen(baseName);
   for (char * p : *this) {
     const char * currentName = fullNameOfRecordStarting(p);

From ad8fea46c3f9e9808ba76c18b4e9adff79bf9ba4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 17:19:06 +0100
Subject: [PATCH 126/295] [shared] Clean unused classes

---
 apps/graph/graph/graph_controller_helper.cpp  |   3 +-
 apps/graph/graph/graph_controller_helper.h    |   2 +-
 .../graph/intersection_graph_controller.cpp   |   2 +-
 apps/graph/graph/tangent_graph_controller.cpp |   2 +-
 apps/shared/Makefile                          |  16 -
 apps/shared/expression_model.cpp              |  59 ----
 apps/shared/expression_model.h                |  41 ---
 .../expression_model_list_controller.cpp      | 123 -------
 .../shared/expression_model_list_controller.h |  36 --
 apps/shared/expression_model_store.cpp        |  69 ----
 apps/shared/expression_model_store.h          |  33 --
 apps/shared/function.cpp                      |  51 ---
 apps/shared/function.h                        |  36 --
 apps/shared/function_app.cpp                  |  70 ----
 apps/shared/function_app.h                    |  43 ---
 apps/shared/function_banner_delegate.cpp      |  37 --
 apps/shared/function_banner_delegate.h        |  21 --
 .../function_curve_parameter_controller.cpp   |  43 ---
 .../function_curve_parameter_controller.h     |  30 --
 .../function_go_to_parameter_controller.cpp   |  45 ---
 .../function_go_to_parameter_controller.h     |  23 --
 apps/shared/function_graph_controller.cpp     | 167 ---------
 apps/shared/function_graph_controller.h       |  61 ----
 apps/shared/function_graph_view.cpp           |  88 -----
 apps/shared/function_graph_view.h             |  37 --
 apps/shared/function_list_controller.cpp      | 220 ------------
 apps/shared/function_list_controller.h        |  71 ----
 apps/shared/function_store.cpp                |  58 ---
 apps/shared/function_store.h                  |  37 --
 apps/shared/list_parameter_controller.cpp     | 124 -------
 apps/shared/list_parameter_controller.h       |  44 ---
 ...rage_function_curve_parameter_controller.h |   1 -
 .../shared/storage_function_list_controller.h |   1 -
 apps/shared/sum_graph_controller.cpp          | 332 ------------------
 apps/shared/sum_graph_controller.h            |  84 -----
 apps/shared/values_controller.cpp             | 322 -----------------
 apps/shared/values_controller.h               |  81 -----
 .../values_function_parameter_controller.cpp  |  57 ---
 .../values_function_parameter_controller.h    |  35 --
 39 files changed, 5 insertions(+), 2600 deletions(-)
 delete mode 100644 apps/shared/expression_model.cpp
 delete mode 100644 apps/shared/expression_model.h
 delete mode 100644 apps/shared/expression_model_list_controller.cpp
 delete mode 100644 apps/shared/expression_model_list_controller.h
 delete mode 100644 apps/shared/expression_model_store.cpp
 delete mode 100644 apps/shared/expression_model_store.h
 delete mode 100644 apps/shared/function.cpp
 delete mode 100644 apps/shared/function.h
 delete mode 100644 apps/shared/function_app.cpp
 delete mode 100644 apps/shared/function_app.h
 delete mode 100644 apps/shared/function_banner_delegate.cpp
 delete mode 100644 apps/shared/function_banner_delegate.h
 delete mode 100644 apps/shared/function_curve_parameter_controller.cpp
 delete mode 100644 apps/shared/function_curve_parameter_controller.h
 delete mode 100644 apps/shared/function_go_to_parameter_controller.cpp
 delete mode 100644 apps/shared/function_go_to_parameter_controller.h
 delete mode 100644 apps/shared/function_graph_controller.cpp
 delete mode 100644 apps/shared/function_graph_controller.h
 delete mode 100644 apps/shared/function_graph_view.cpp
 delete mode 100644 apps/shared/function_graph_view.h
 delete mode 100644 apps/shared/function_list_controller.cpp
 delete mode 100644 apps/shared/function_list_controller.h
 delete mode 100644 apps/shared/function_store.cpp
 delete mode 100644 apps/shared/function_store.h
 delete mode 100644 apps/shared/list_parameter_controller.cpp
 delete mode 100644 apps/shared/list_parameter_controller.h
 delete mode 100644 apps/shared/sum_graph_controller.cpp
 delete mode 100644 apps/shared/sum_graph_controller.h
 delete mode 100644 apps/shared/values_controller.cpp
 delete mode 100644 apps/shared/values_controller.h
 delete mode 100644 apps/shared/values_function_parameter_controller.cpp
 delete mode 100644 apps/shared/values_function_parameter_controller.h

diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index 41135c4aa..7f59b3cf3 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -1,4 +1,5 @@
 #include "graph_controller_helper.h"
+#include "../../shared/storage_function_banner_delegate.h"
 #include "../app.h"
 #include "../../constant.h"
 #include "../../shared/poincare_helpers.h"
@@ -20,7 +21,7 @@ bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCurso
 
 void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, Ion::Storage::Record record, App * app) {
   ExpiringPointer<StorageCartesianFunction> function = app->functionStore()->modelForRecord(record);
-  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
   int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize, StorageCartesianFunction::Symbol());
diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index c760ef72d..b6ebadfa0 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -1,7 +1,7 @@
 #ifndef GRAPH_GRAPH_CONTROLLER_HELPER_H
 #define GRAPH_GRAPH_CONTROLLER_HELPER_H
 
-#include "../../shared/function_banner_delegate.h"
+#include "../../shared/banner_view.h"
 #include "../../shared/text_field_delegate_app.h"
 #include "../../shared/interactive_curve_view_range.h"
 #include "../storage_cartesian_function_store.h"
diff --git a/apps/graph/graph/intersection_graph_controller.cpp b/apps/graph/graph/intersection_graph_controller.cpp
index 93bc35422..0d45ff805 100644
--- a/apps/graph/graph/intersection_graph_controller.cpp
+++ b/apps/graph/graph/intersection_graph_controller.cpp
@@ -19,7 +19,7 @@ const char * IntersectionGraphController::title() {
 void IntersectionGraphController::reloadBannerView() {
   m_bannerView->setNumberOfSubviews(2);
   reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunction::Symbol());
-  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
   const char * legend = "=";
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index c66985d4a..197a69938 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -42,7 +42,7 @@ void TangentGraphController::reloadBannerView() {
   App * myApp = static_cast<App *>(app());
   StorageFunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_record, myApp->functionStore(), StorageCartesianFunction::Symbol());
   GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(m_cursor, m_record, myApp);
-  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * legend = "a=";
   int legendLength = strlcpy(buffer, legend, bufferSize);
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index 9176ba56d..ba497ab19 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -10,21 +10,9 @@ app_src += $(addprefix apps/shared/,\
   double_pair_store.cpp \
   editable_cell_table_view_controller.cpp \
   expression_field_delegate_app.cpp \
-  expression_model.cpp \
   expression_model_handle.cpp \
-  expression_model_list_controller.cpp \
-  expression_model_store.cpp \
   float_parameter_controller.cpp \
-  function.cpp \
-  function_app.cpp \
-  function_banner_delegate.cpp \
-  function_curve_parameter_controller.cpp \
   function_expression_cell.cpp \
-  function_go_to_parameter_controller.cpp \
-  function_graph_controller.cpp \
-  function_graph_view.cpp \
-  function_list_controller.cpp \
-  function_store.cpp \
   function_title_cell.cpp \
   global_context.cpp \
   go_to_parameter_controller.cpp \
@@ -39,7 +27,6 @@ app_src += $(addprefix apps/shared/,\
   interval_parameter_controller.cpp \
   language_controller.cpp \
   layout_field_delegate.cpp \
-  list_parameter_controller.cpp \
   margin_even_odd_message_text_cell.cpp \
   memoized_curve_view_range.cpp \
   message_view.cpp \
@@ -75,14 +62,11 @@ app_src += $(addprefix apps/shared/,\
   store_parameter_controller.cpp \
   store_selectable_table_view.cpp \
   store_title_cell.cpp \
-  sum_graph_controller.cpp \
   tab_table_controller.cpp \
   text_field_delegate.cpp \
   text_field_delegate_app.cpp \
   text_field_with_extension.cpp \
   toolbox_helpers.cpp \
-  values_controller.cpp \
-  values_function_parameter_controller.cpp \
   values_parameter_controller.cpp \
   vertical_cursor_view.cpp \
   zoom_parameter_controller.cpp \
diff --git a/apps/shared/expression_model.cpp b/apps/shared/expression_model.cpp
deleted file mode 100644
index bc7362e85..000000000
--- a/apps/shared/expression_model.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-#include "function.h"
-#include "poincare_helpers.h"
-#include <string.h>
-#include <cmath>
-#include <assert.h>
-
-using namespace Poincare;
-
-namespace Shared {
-
-ExpressionModel::ExpressionModel() :
-  m_text{0},
-  m_expression(),
-  m_layout()
-{
-}
-
-const char * ExpressionModel::text() const {
-  return m_text;
-}
-
-Poincare::Expression ExpressionModel::expression(Poincare::Context * context) const {
-  if (m_expression.isUninitialized()) {
-    m_expression = PoincareHelpers::ParseAndSimplify(m_text, *context);
-  }
-  return m_expression;
-}
-
-Layout ExpressionModel::layout() {
-  if (m_layout.isUninitialized()) {
-    Expression nonSimplifiedExpression = Expression::Parse(m_text);
-    m_layout = PoincareHelpers::CreateLayout(nonSimplifiedExpression);
-  }
-  return m_layout;
-}
-
-bool ExpressionModel::isDefined() {
-  return m_text[0] != 0;
-}
-
-bool ExpressionModel::isEmpty() {
-  return m_text[0] == 0;
-}
-
-void ExpressionModel::setContent(const char * c) {
-  strlcpy(m_text, c, sizeof(m_text));
-  /* We cannot call tidy here because tidy is a virtual function and does not
-   * do the same thing for all children class. And here we want to delete only
-   * the m_layout and m_expression. */
-  m_layout = Layout();
-  m_expression = Expression();
-}
-
-void ExpressionModel::tidy() {
-  m_layout = Layout();
-  m_expression = Expression();
-}
-
-}
diff --git a/apps/shared/expression_model.h b/apps/shared/expression_model.h
deleted file mode 100644
index 71f2ac3c5..000000000
--- a/apps/shared/expression_model.h
+++ /dev/null
@@ -1,41 +0,0 @@
-#ifndef SHARED_EXPRESSION_MODEL_H
-#define SHARED_EXPRESSION_MODEL_H
-
-#include <apps/constant.h>
-#include <poincare/expression.h>
-#include <poincare/context.h>
-#include <poincare/layout.h>
-#include <kandinsky.h>
-#include <escher.h>
-
-namespace Shared {
-
-class ExpressionModel {
-public:
-  ExpressionModel();
-  const char * text() const;
-  Poincare::Expression expression(Poincare::Context * context) const;
-  Poincare::Layout layout();
-  /* Here, isDefined is the exact contrary of isEmpty. However, for Sequence
-   * inheriting from ExpressionModel, isEmpty and isDefined have not exactly
-   * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
-   * not defined. We thus have to keep both methods. */
-  virtual bool isDefined();
-  virtual bool isEmpty();
-  virtual bool shouldBeClearedBeforeRemove() {
-    return !isEmpty();
-  }
-  virtual void setContent(const char * c);
-  virtual void tidy();
-  constexpr static int k_expressionBufferSize = Constant::MaxSerializedExpressionSize;
-private:
-  constexpr static size_t k_dataLengthInBytes = k_expressionBufferSize*sizeof(char);
-  static_assert((k_dataLengthInBytes & 0x3) == 0, "The expression model data size is not a multiple of 4 bytes (cannot compute crc)"); // Assert that dataLengthInBytes is a multiple of 4
-  char m_text[k_expressionBufferSize];
-  mutable Poincare::Expression m_expression;
-  mutable Poincare::Layout m_layout;
-};
-
-}
-
-#endif
diff --git a/apps/shared/expression_model_list_controller.cpp b/apps/shared/expression_model_list_controller.cpp
deleted file mode 100644
index 02a52ec4f..000000000
--- a/apps/shared/expression_model_list_controller.cpp
+++ /dev/null
@@ -1,123 +0,0 @@
-#include "expression_model_list_controller.h"
-#include <assert.h>
-
-namespace Shared {
-
-ExpressionModelListController::ExpressionModelListController(Responder * parentResponder, I18n::Message text) :
-  ViewController(parentResponder),
-  m_addNewModel()
-{
-  m_addNewModel.setMessage(text);
-}
-
-/* Table Data Source */
-int ExpressionModelListController::numberOfExpressionRows() {
-  if (modelStore()->numberOfModels() == modelStore()->maxNumberOfModels()) {
-    return modelStore()->numberOfModels();
-  }
-  return 1 + modelStore()->numberOfModels();
-}
-
-KDCoordinate ExpressionModelListController::expressionRowHeight(int j) {
-  if (isAddEmptyRow(j)) {
-    return Metric::StoreRowHeight;
-  }
-  ExpressionModel * m = modelStore()->modelAtIndex(j);
-  if (m->layout().isUninitialized()) {
-    return Metric::StoreRowHeight;
-  }
-  KDCoordinate modelSize = m->layout().layoutSize().height();
-  return modelSize + Metric::StoreRowHeight - KDFont::LargeFont->glyphSize().height();
-}
-
-void ExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
-  EvenOddExpressionCell * myCell = (EvenOddExpressionCell *)cell;
-  ExpressionModel * m = modelStore()->modelAtIndex(j);
-  myCell->setLayout(m->layout());
-}
-
-/* Responder */
-
-bool ExpressionModelListController::handleEventOnExpression(Ion::Events::Event event) {
-  if (selectedRow() < 0) {
-    return false;
-  }
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    if (isAddEmptyRow(selectedRow())) {
-      addEmptyModel();
-      selectableTableView()->reloadCellAtLocation(selectedColumn(), selectedRow());
-      return true;
-    }
-    ExpressionModel * model = modelStore()->modelAtIndex(modelIndexForRow(selectedRow()));
-    editExpression(model, event);
-    return true;
-  }
-  if (event == Ion::Events::Backspace && !isAddEmptyRow(selectedRow())) {
-    ExpressionModel * model = modelStore()->modelAtIndex(modelIndexForRow(selectedRow()));
-    if (model->shouldBeClearedBeforeRemove()) {
-      reinitExpression(model);
-      selectableTableView()->reloadCellAtLocation(selectedColumn(), selectedRow());
-    } else {
-      if (removeModelRow(model)) {
-        int newSelectedRow = selectedRow() >= numberOfExpressionRows() ? numberOfExpressionRows()-1 : selectedRow();
-        selectCellAtLocation(selectedColumn(), newSelectedRow);
-        selectableTableView()->reloadCellAtLocation(selectedColumn(), selectedRow());
-        selectableTableView()->reloadData();
-      }
-    }
-    return true;
-  }
-  if ((event.hasText() || event == Ion::Events::XNT || event == Ion::Events::Paste || event == Ion::Events::Toolbox || event == Ion::Events::Var)
-      && !isAddEmptyRow(selectedRow())) {
-    ExpressionModel * model = modelStore()->modelAtIndex(modelIndexForRow(selectedRow()));
-    editExpression(model, event);
-    return true;
-  }
-  return false;
-}
-
-void ExpressionModelListController::addEmptyModel() {
-  ExpressionModel * e = modelStore()->addEmptyModel();
-  selectableTableView()->reloadData();
-  editExpression(e, Ion::Events::OK);
-}
-
-void ExpressionModelListController::reinitExpression(ExpressionModel * model) {
-  model->setContent("");
-  selectableTableView()->reloadData();
-}
-
-void ExpressionModelListController::editExpression(ExpressionModel * model, Ion::Events::Event event) {
-  char * initialText = nullptr;
-  char initialTextContent[TextField::maxBufferSize()];
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    strlcpy(initialTextContent, model->text(), sizeof(initialTextContent));
-    initialText = initialTextContent;
-  }
-  inputController()->edit(this, event, model, initialText,
-    [](void * context, void * sender){
-    ExpressionModel * myModel = static_cast<ExpressionModel *>(context);
-    InputViewController * myInputViewController = (InputViewController *)sender;
-    const char * textBody = myInputViewController->textBody();
-    myModel->setContent(textBody);
-    return true; // TODO we should return a result from myModel->setContent, but we will remove ExpressionModelListController soon anyway
-    },
-    [](void * context, void * sender){
-    return true;
-    });
-}
-
-bool ExpressionModelListController::removeModelRow(ExpressionModel * model) {
-  modelStore()->removeModel(model);
-  return true;
-}
-
-int ExpressionModelListController::modelIndexForRow(int j) {
-  return j;
-}
-
-bool ExpressionModelListController::isAddEmptyRow(int j) {
-  return j == modelStore()->numberOfModels();
-}
-
-}
diff --git a/apps/shared/expression_model_list_controller.h b/apps/shared/expression_model_list_controller.h
deleted file mode 100644
index f8f910670..000000000
--- a/apps/shared/expression_model_list_controller.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef SHARED_EXPRESSION_MODEL_LIST_CONTROLLER_H
-#define SHARED_EXPRESSION_MODEL_LIST_CONTROLLER_H
-
-#include <escher.h>
-#include "expression_model_store.h"
-#include <apps/i18n.h>
-
-namespace Shared {
-
-class ExpressionModelListController : public ViewController, public SelectableTableViewDataSource {
-public:
-  ExpressionModelListController(Responder * parentResponder, I18n::Message text);
-protected:
-  static constexpr KDCoordinate k_expressionMargin = 5;
-  /* Table Data Source */
-  virtual int numberOfExpressionRows();
-  virtual KDCoordinate expressionRowHeight(int j);
-  virtual void willDisplayExpressionCellAtIndex(HighlightCell * cell, int j);
-  /* Responder */
-  bool handleEventOnExpression(Ion::Events::Event event);
-  virtual void addEmptyModel();
-  virtual void reinitExpression(ExpressionModel * model);
-  virtual void editExpression(ExpressionModel * model, Ion::Events::Event event);
-  virtual bool removeModelRow(ExpressionModel * function);
-  virtual int modelIndexForRow(int j);
-  virtual bool isAddEmptyRow(int j);
-  /* View Controller */
-  virtual SelectableTableView * selectableTableView() = 0;
-  virtual ExpressionModelStore * modelStore() = 0;
-  virtual InputViewController * inputController() = 0;
-  EvenOddMessageTextCell m_addNewModel;
-};
-
-}
-
-#endif
diff --git a/apps/shared/expression_model_store.cpp b/apps/shared/expression_model_store.cpp
deleted file mode 100644
index 02e98fba6..000000000
--- a/apps/shared/expression_model_store.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-#include "expression_model_store.h"
-#include "function.h"
-#include <assert.h>
-
-namespace Shared {
-
-ExpressionModelStore::ExpressionModelStore() :
-  m_numberOfModels(0)
-{
-}
-
-ExpressionModel * ExpressionModelStore::addEmptyModel() {
-  assert(m_numberOfModels < maxNumberOfModels());
-  setModelAtIndex(emptyModel(), m_numberOfModels++);
-  return modelAtIndex(m_numberOfModels-1);
-}
-
-void ExpressionModelStore::removeModel(ExpressionModel * f) {
-  int i = 0;
-  while (modelAtIndex(i) != f && i < m_numberOfModels) {
-    i++;
-  }
-  assert(i>=0 && i<m_numberOfModels);
-  for (int j = i; j<m_numberOfModels-1; j++) {
-    setModelAtIndex(modelAtIndex(j+1), j);
-  }
-  setModelAtIndex(nullModel(), m_numberOfModels-1);
-  m_numberOfModels--;
-}
-
-void ExpressionModelStore::removeAll() {
-  for (int i = 0; i < m_numberOfModels; i++) {
-    setModelAtIndex(nullModel(), i);
-  }
-  m_numberOfModels = 0;
-}
-
-ExpressionModel * ExpressionModelStore::definedModelAtIndex(int i) {
-  assert(i>=0 && i<m_numberOfModels);
-  int index = 0;
-  for (int k = 0; k < m_numberOfModels; k++) {
-    if (modelAtIndex(k)->isDefined()) {
-      if (i == index) {
-        return modelAtIndex(k);
-      }
-      index++;
-    }
-  }
-  assert(false);
-  return nullptr;
-}
-
-int ExpressionModelStore::numberOfDefinedModels() {
-  int result = 0;
-  for (int i = 0; i < m_numberOfModels; i++) {
-    if (modelAtIndex(i)->isDefined()) {
-      result++;
-    }
-  }
-  return result;
-}
-
-void ExpressionModelStore::tidy() {
-  for (int i = 0; i < m_numberOfModels; i++) {
-    modelAtIndex(i)->tidy();
-  }
-}
-
-}
diff --git a/apps/shared/expression_model_store.h b/apps/shared/expression_model_store.h
deleted file mode 100644
index e090cc19d..000000000
--- a/apps/shared/expression_model_store.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef SHARED_EXPRESSION_MODEL_STORE_H
-#define SHARED_EXPRESSION_MODEL_STORE_H
-
-#include "expression_model.h"
-#include <stdint.h>
-
-namespace Shared {
-
-/* ExpressionModelStore is a dumb class.
- * Its only job is to store model */
-
-class ExpressionModelStore {
-public:
-  ExpressionModelStore();
-  virtual ExpressionModel * modelAtIndex(int i) = 0;
-  ExpressionModel * addEmptyModel();
-  void removeModel(ExpressionModel * f);
-  virtual void removeAll();
-  int numberOfModels() const { return m_numberOfModels; };
-  virtual ExpressionModel * definedModelAtIndex(int i);
-  int numberOfDefinedModels();
-  virtual int maxNumberOfModels() const = 0;
-  virtual void tidy();
-protected:
-  virtual ExpressionModel * emptyModel() = 0;
-  virtual ExpressionModel * nullModel() = 0;
-  virtual void setModelAtIndex(ExpressionModel * f, int i) = 0;
-  int m_numberOfModels;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function.cpp b/apps/shared/function.cpp
deleted file mode 100644
index 3fff69cd8..000000000
--- a/apps/shared/function.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-#include "function.h"
-#include "poincare_helpers.h"
-#include <string.h>
-#include <cmath>
-#include <assert.h>
-
-using namespace Poincare;
-
-namespace Shared {
-
-Function::Function(const char * name, KDColor color) :
-  ExpressionModel(),
-  m_name(name),
-  m_color(color),
-  m_active(true)
-{
-}
-
-uint32_t Function::checksum() {
-  char data[k_dataLengthInBytes/sizeof(char)] = {};
-  strlcpy(data, text(), TextField::maxBufferSize());
-  data[k_dataLengthInBytes-2] = m_name != nullptr ? m_name[0] : 0;
-  data[k_dataLengthInBytes-1] = m_active ? 1 : 0;
-  return Ion::crc32((uint32_t *)data, k_dataLengthInBytes/sizeof(uint32_t));
-}
-
-void Function::setColor(KDColor color) {
-  m_color = color;
-}
-
-const char * Function::name() const {
-  return m_name;
-}
-
-bool Function::isActive() {
-  return m_active;
-}
-
-void Function::setActive(bool active) {
-  m_active = active;
-}
-
-template<typename T>
-T Function::templatedApproximateAtAbscissa(T x, Poincare::Context * context) const {
-  return PoincareHelpers::ApproximateWithValueForSymbol(expression(context), symbol(), x, *context);
-}
-
-}
-
-template float Shared::Function::templatedApproximateAtAbscissa<float>(float, Poincare::Context*) const;
-template double Shared::Function::templatedApproximateAtAbscissa<double>(double, Poincare::Context*) const;
diff --git a/apps/shared/function.h b/apps/shared/function.h
deleted file mode 100644
index 41a503ff3..000000000
--- a/apps/shared/function.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef SHARED_FUNCTION_H
-#define SHARED_FUNCTION_H
-
-#include "expression_model.h"
-
-namespace Shared {
-
-class Function : public ExpressionModel {
-public:
-  Function(const char * name = nullptr, KDColor color = KDColorBlack);
-  virtual uint32_t checksum();
-  const char * name() const;
-  KDColor color() const { return m_color; }
-  bool isActive();
-  void setActive(bool active);
-  void setColor(KDColor m_color);
-  virtual float evaluateAtAbscissa(float x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context);
-  }
-  virtual double evaluateAtAbscissa(double x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context);
-  }
-  virtual double sumBetweenBounds(double start, double end, Poincare::Context * context) const = 0;
-private:
-  constexpr static size_t k_dataLengthInBytes = (TextField::maxBufferSize()+2)*sizeof(char)+2;
-  static_assert((k_dataLengthInBytes & 0x3) == 0, "The function data size is not a multiple of 4 bytes (cannot compute crc)"); // Assert that dataLengthInBytes is a multiple of 4
-  template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context) const;
-  virtual const char * symbol() const = 0;
-  const char * m_name;
-  KDColor m_color;
-  bool m_active;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_app.cpp b/apps/shared/function_app.cpp
deleted file mode 100644
index 0dfc4ec3c..000000000
--- a/apps/shared/function_app.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-#include "function_app.h"
-#include "../apps_container.h"
-
-using namespace Poincare;
-
-namespace Shared {
-
-FunctionApp::Snapshot::Snapshot() :
-  m_cursor(),
-  m_interval(),
-  m_indexFunctionSelectedByCursor(0),
-  m_modelVersion(0),
-  m_rangeVersion(0),
-  m_angleUnitVersion(Preferences::AngleUnit::Radian)
-{
-  m_interval.setStart(0);
-  m_interval.setEnd(10);
-  m_interval.setStep(1);
-}
-
-CurveViewCursor * FunctionApp::Snapshot::cursor() {
-  return &m_cursor;
-}
-
-uint32_t * FunctionApp::Snapshot::modelVersion() {
-  return &m_modelVersion;
-}
-
-uint32_t * FunctionApp::Snapshot::rangeVersion() {
-  return &m_rangeVersion;
-}
-
-Preferences::AngleUnit * FunctionApp::Snapshot::angleUnitVersion() {
-  return &m_angleUnitVersion;
-}
-
-Interval * FunctionApp::Snapshot::interval() {
-  return &m_interval;
-}
-
-int * FunctionApp::Snapshot::indexFunctionSelectedByCursor() {
-  return &m_indexFunctionSelectedByCursor;
-}
-
-void FunctionApp::Snapshot::reset() {
-  m_interval.setStart(0);
-  m_interval.setEnd(10);
-  m_interval.setStep(1);
-  m_indexFunctionSelectedByCursor = 0;
-  m_modelVersion = 0;
-  m_rangeVersion = 0;
-  setActiveTab(0);
-}
-
-FunctionApp::FunctionApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
-  ExpressionFieldDelegateApp(container, snapshot, rootViewController)
-{
-}
-
-void FunctionApp::willBecomeInactive() {
-  if (m_modalViewController.isDisplayingModal()) {
-    m_modalViewController.dismissModalViewController();
-  }
-  if (inputViewController()->isDisplayingModal()) {
-    inputViewController()->abortEditionAndDismiss();
-  }
-  ::App::willBecomeInactive();
-}
-
-}
diff --git a/apps/shared/function_app.h b/apps/shared/function_app.h
deleted file mode 100644
index 4b8e2538c..000000000
--- a/apps/shared/function_app.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef SHARED_FUNCTION_APP_H
-#define SHARED_FUNCTION_APP_H
-
-#include <poincare/preferences.h>
-#include "expression_field_delegate_app.h"
-#include "curve_view_cursor.h"
-#include "interval.h"
-
-class AppsContainer;
-
-namespace Shared {
-
-class FunctionApp : public ExpressionFieldDelegateApp {
-public:
-  class Snapshot : public ::App::Snapshot, public TabViewDataSource {
-  public:
-    Snapshot();
-    CurveViewCursor * cursor();
-    uint32_t * modelVersion();
-    uint32_t * rangeVersion();
-    Poincare::Preferences::AngleUnit * angleUnitVersion();
-    Interval * interval();
-    int * indexFunctionSelectedByCursor();
-    void reset() override;
-  protected:
-    CurveViewCursor m_cursor;
-    Interval m_interval;
-  private:
-    int m_indexFunctionSelectedByCursor;
-    uint32_t m_modelVersion;
-    uint32_t m_rangeVersion;
-    Poincare::Preferences::AngleUnit m_angleUnitVersion;
- };
-  virtual ~FunctionApp() = default;
-  virtual InputViewController * inputViewController() = 0;
-  void willBecomeInactive() override;
-protected:
-  FunctionApp(Container * container, Snapshot * snapshot, ViewController * rootViewController);
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_banner_delegate.cpp b/apps/shared/function_banner_delegate.cpp
deleted file mode 100644
index 16e53fb4b..000000000
--- a/apps/shared/function_banner_delegate.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-#include "function_banner_delegate.h"
-#include "poincare_helpers.h"
-#include "../constant.h"
-
-using namespace Poincare;
-
-namespace Shared {
-
-void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Function * function, char symbol) {
-  constexpr size_t bufferSize = k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
-  char buffer[bufferSize];
-  const char * space = "                  ";
-  const char * legend = "0=";
-  int legendLength = strlen(legend);
-  int numberOfChar = 0;
-  strlcpy(buffer, legend, bufferSize);
-  numberOfChar += legendLength;
-  buffer[0] = symbol;
-  numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
-  strlcpy(buffer+numberOfChar, space, bufferSize - numberOfChar);
-  buffer[k_maxDigitLegendLength+2] = 0;
-  bannerView()->setLegendAtIndex(buffer, 0);
-
-  numberOfChar = 0;
-  legend = "0(x)=";
-  legendLength = strlen(legend);
-  numberOfChar += legendLength;
-  strlcpy(buffer, legend, bufferSize);
-  buffer[2] = symbol;
-  buffer[0] = function->name()[0];
-  numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->y(), buffer+legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
-  strlcpy(buffer+numberOfChar, space, bufferSize - numberOfChar);
-  buffer[k_maxDigitLegendLength+5] = 0;
-  bannerView()->setLegendAtIndex(buffer, 1);
-}
-
-}
diff --git a/apps/shared/function_banner_delegate.h b/apps/shared/function_banner_delegate.h
deleted file mode 100644
index 0d690eaea..000000000
--- a/apps/shared/function_banner_delegate.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef SHARED_FUNCTION_BANNER_DELEGATE_H
-#define SHARED_FUNCTION_BANNER_DELEGATE_H
-
-#include "function_store.h"
-#include "banner_view.h"
-#include "curve_view_cursor.h"
-
-namespace Shared {
-
-class FunctionBannerDelegate  {
-public:
-  constexpr static int k_maxNumberOfCharacters = 50;
-  constexpr static int k_maxDigitLegendLength = 11;
-protected:
-  void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Function * function, char symbol);
-  virtual BannerView * bannerView() = 0;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_curve_parameter_controller.cpp b/apps/shared/function_curve_parameter_controller.cpp
deleted file mode 100644
index 25d715273..000000000
--- a/apps/shared/function_curve_parameter_controller.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-#include "function_curve_parameter_controller.h"
-#include <assert.h>
-
-namespace Shared {
-
-FunctionCurveParameterController::FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  ViewController(nullptr),
-  m_goToCell(I18n::Message::Goto),
-  m_selectableTableView(this, this, this),
-  m_function(nullptr)
-{
-}
-
-View * FunctionCurveParameterController::view() {
-  return &m_selectableTableView;
-}
-
-void FunctionCurveParameterController::didBecomeFirstResponder() {
-  if (selectedRow() < 0) {
-    selectCellAtLocation(0, 0);
-  }
-  app()->setFirstResponder(&m_selectableTableView);
-}
-
-bool FunctionCurveParameterController::handleGotoSelection() {
-  if (m_function == nullptr) {
-    return false;
-  }
-  goToParameterController()->setFunction(m_function);
-  StackViewController * stack = (StackViewController *)parentResponder();
-  stack->push(goToParameterController());
-  return true;
-}
-
-KDCoordinate FunctionCurveParameterController::cellHeight() {
-  return Metric::ParameterCellHeight;
-}
-
-void FunctionCurveParameterController::setFunction(Function * function) {
-  m_function = function;
-}
-
-}
diff --git a/apps/shared/function_curve_parameter_controller.h b/apps/shared/function_curve_parameter_controller.h
deleted file mode 100644
index 96df43d42..000000000
--- a/apps/shared/function_curve_parameter_controller.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef SHARED_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
-#define SHARED_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
-
-#include <escher.h>
-#include "function_go_to_parameter_controller.h"
-#include "function.h"
-#include "curve_view_cursor.h"
-#include "interactive_curve_view_range.h"
-
-namespace Shared {
-
-class FunctionCurveParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
-public:
-  FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor);
-  View * view() override;
-  void didBecomeFirstResponder() override;
-  KDCoordinate cellHeight() override;
-  void setFunction(Function * function);
-protected:
-  bool handleGotoSelection();
-  MessageTableCellWithChevron m_goToCell;
-  SelectableTableView m_selectableTableView;
-  Function * m_function;
-private:
-  virtual FunctionGoToParameterController * goToParameterController() = 0;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_go_to_parameter_controller.cpp b/apps/shared/function_go_to_parameter_controller.cpp
deleted file mode 100644
index acfa17836..000000000
--- a/apps/shared/function_go_to_parameter_controller.cpp
+++ /dev/null
@@ -1,45 +0,0 @@
-#include "function_go_to_parameter_controller.h"
-#include "text_field_delegate_app.h"
-#include <assert.h>
-#include <cmath>
-
-namespace Shared {
-
-FunctionGoToParameterController::FunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol) :
-  GoToParameterController(parentResponder, inputEventHandlerDelegate, graphRange, cursor, symbol),
-  m_function(nullptr)
-{
-}
-
-const char * FunctionGoToParameterController::title() {
-  return I18n::translate(I18n::Message::Goto);
-}
-
-double FunctionGoToParameterController::parameterAtIndex(int index) {
-  assert(index == 0);
-  return m_cursor->x();
-}
-
-bool FunctionGoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
-  assert(parameterIndex == 0);
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  float y = m_function->evaluateAtAbscissa(f, myApp->localContext());
-  if (std::fabs(f) > k_maxDisplayableFloat || std::fabs(y) > k_maxDisplayableFloat) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
-  if (std::isnan(y) || std::isinf(y)) {
-    app()->displayWarning(I18n::Message::ValueNotReachedByFunction);
-    return false;
-  }
-  m_cursor->moveTo(f, y);
-  m_graphRange->centerAxisAround(CurveViewRange::Axis::X, m_cursor->x());
-  m_graphRange->centerAxisAround(CurveViewRange::Axis::Y, m_cursor->y());
-  return true;
-}
-
-void FunctionGoToParameterController::setFunction(Function * function) {
-  m_function = function;
-}
-
-}
diff --git a/apps/shared/function_go_to_parameter_controller.h b/apps/shared/function_go_to_parameter_controller.h
deleted file mode 100644
index 00d9bb25a..000000000
--- a/apps/shared/function_go_to_parameter_controller.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef SHARED_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
-#define SHARED_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
-
-#include "go_to_parameter_controller.h"
-#include "function.h"
-
-namespace Shared {
-
-class FunctionGoToParameterController : public GoToParameterController {
-public:
-  FunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol);
-  const char * title() override;
-  void setFunction(Function * function);
-protected:
-  bool setParameterAtIndex(int parameterIndex, double f) override;
-  Function * m_function;
-private:
-  double parameterAtIndex(int index) override;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
deleted file mode 100644
index 11d3b6a18..000000000
--- a/apps/shared/function_graph_controller.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-#include "function_graph_controller.h"
-#include "text_field_delegate_app.h"
-#include <assert.h>
-#include <cmath>
-#include <float.h>
-
-using namespace Poincare;
-
-namespace Shared {
-
-FunctionGraphController::FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion) :
-  InteractiveCurveViewController(parentResponder, inputEventHandlerDelegate, header, interactiveRange, curveView, cursor, modelVersion, rangeVersion),
-  m_initialisationParameterController(this, interactiveRange),
-  m_angleUnitVersion(angleUnitVersion),
-  m_indexFunctionSelectedByCursor(indexFunctionSelectedByCursor)
-{
-}
-
-bool FunctionGraphController::isEmpty() const {
-  if (functionStore()->numberOfActiveFunctions() == 0) {
-    return true;
-  }
-  return false;
-}
-
-ViewController * FunctionGraphController::initialisationParameterController() {
-  return &m_initialisationParameterController;
-}
-
-void FunctionGraphController::viewWillAppear() {
-  functionGraphView()->setCursorView(cursorView());
-  functionGraphView()->setBannerView(bannerView());
-  functionGraphView()->setAreaHighlight(NAN,NAN);
-
-  if (functionGraphView()->context() == nullptr) {
-    TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-    functionGraphView()->setContext(myApp->localContext());
-  }
-  Preferences::AngleUnit newAngleUnitVersion = Preferences::sharedPreferences()->angleUnit();
-  if (*m_angleUnitVersion != newAngleUnitVersion) {
-    *m_angleUnitVersion = newAngleUnitVersion;
-    initCursorParameters();
-  }
-  InteractiveCurveViewController::viewWillAppear();
-}
-
-bool FunctionGraphController::handleEnter() {
-  Function * f = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
-  curveParameterController()->setFunction(f);
-  StackViewController * stack = stackController();
-  stack->push(curveParameterController());
-  return true;
-}
-
-void FunctionGraphController::selectFunctionWithCursor(int functionIndex) {
-  *m_indexFunctionSelectedByCursor = functionIndex;
-}
-
-void FunctionGraphController::reloadBannerView() {
-  if (functionStore()->numberOfActiveFunctions() == 0) {
-    return;
-  }
-  Function * f = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
-  reloadBannerViewForCursorOnFunction(m_cursor, f, functionStore()->symbol());
-}
-
-InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  float min = FLT_MAX;
-  float max = -FLT_MAX;
-  float xMin = interactiveCurveViewRange->xMin();
-  float xMax = interactiveCurveViewRange->xMax();
-  if (functionStore()->numberOfActiveFunctions() <= 0) {
-    InteractiveCurveViewRangeDelegate::Range range;
-    range.min = xMin;
-    range.max = xMax;
-    return range;
-  }
-  for (int i=0; i<functionStore()->numberOfActiveFunctions(); i++) {
-    Function * f = functionStore()->activeFunctionAtIndex(i);
-    float y = 0.0f;
-    float res = curveView()->resolution();
-    /* Scan x-range from the middle to the extrema in order to get balanced
-     * y-range for even functions (y = 1/x). */
-    for (int j = -res/2; j <= res/2; j++) {
-      float x = (xMin+xMax)/2.0+(xMax-xMin)*j/res;
-      y = f->evaluateAtAbscissa(x, myApp->localContext());
-      if (!std::isnan(y) && !std::isinf(y)) {
-        min = min < y ? min : y;
-        max = max > y ? max : y;
-      }
-    }
-  }
-  InteractiveCurveViewRangeDelegate::Range range;
-  range.min = min;
-  range.max = max;
-  return range;
-}
-
-void FunctionGraphController::initRangeParameters() {
-  interactiveCurveViewRange()->setDefault();
-  initCursorParameters();
-  selectFunctionWithCursor(0);
-}
-
-double FunctionGraphController::defaultCursorAbscissa() {
-  return (interactiveCurveViewRange()->xMin()+interactiveCurveViewRange()->xMax())/2.0f;
-}
-
-void FunctionGraphController::initCursorParameters() {
-  double x = defaultCursorAbscissa();
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  int functionIndex = 0;
-  double y = 0;
-  do {
-    Function * firstFunction = functionStore()->activeFunctionAtIndex(functionIndex++);
-    y = firstFunction->evaluateAtAbscissa(x, myApp->localContext());
-  } while ((std::isnan(y) || std::isinf(y)) && functionIndex < functionStore()->numberOfActiveFunctions());
-  m_cursor->moveTo(x, y);
-  functionIndex = (std::isnan(y) || std::isinf(y)) ? 0 : functionIndex - 1;
-  selectFunctionWithCursor(functionIndex);
-  if (interactiveCurveViewRange()->yAuto()) {
-    interactiveCurveViewRange()->panToMakePointVisible(x, y, k_displayTopMarginRatio, k_cursorRightMarginRatio, k_displayBottomMarginRatio, k_cursorLeftMarginRatio);
-  }
-}
-
-bool FunctionGraphController::moveCursorVertically(int direction) {
-  Function * actualFunction = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  double y = actualFunction->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
-  Function * nextFunction = actualFunction;
-  double nextY = direction > 0 ? DBL_MAX : -DBL_MAX;
-  for (int i = 0; i < functionStore()->numberOfActiveFunctions(); i++) {
-    Function * f = functionStore()->activeFunctionAtIndex(i);
-    double newY = f->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
-    bool isNextFunction = direction > 0 ? (newY > y && newY < nextY) : (newY < y && newY > nextY);
-    if (isNextFunction) {
-      selectFunctionWithCursor(i);
-      nextY = newY;
-      nextFunction = f;
-    }
-  }
-  if (nextFunction == actualFunction) {
-    return false;
-  }
-  m_cursor->moveTo(m_cursor->x(), nextY);
-  interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
-  return true;
-}
-
-CurveView * FunctionGraphController::curveView() {
-  return functionGraphView();
-}
-
-uint32_t FunctionGraphController::modelVersion() {
-  return functionStore()->storeChecksum();
-}
-
-uint32_t FunctionGraphController::rangeVersion() {
-  return interactiveCurveViewRange()->rangeChecksum();
-}
-
-bool FunctionGraphController::isCursorVisible() {
-  return interactiveCurveViewRange()->isCursorVisible(k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
-}
-
-}
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
deleted file mode 100644
index eb975200e..000000000
--- a/apps/shared/function_graph_controller.h
+++ /dev/null
@@ -1,61 +0,0 @@
-#ifndef SHARED_FUNCTION_GRAPH_CONTROLLER_H
-#define SHARED_FUNCTION_GRAPH_CONTROLLER_H
-
-#include <escher.h>
-#include "initialisation_parameter_controller.h"
-#include "function_banner_delegate.h"
-#include "interactive_curve_view_controller.h"
-#include "function_store.h"
-#include "function_graph_view.h"
-#include "function_curve_parameter_controller.h"
-
-namespace Shared {
-
-class FunctionGraphController : public InteractiveCurveViewController, public FunctionBannerDelegate {
-public:
-  FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header,  InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion);
-  bool isEmpty() const override;
-  ViewController * initialisationParameterController() override;
-  void viewWillAppear() override;
-
-protected:
-  constexpr static float k_cursorTopMarginRatio = 0.068f;   // (cursorHeight/2)/graphViewHeight
-  constexpr static float k_cursorBottomMarginRatio = 0.15f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
-  void reloadBannerView() override;
-  bool handleEnter() override;
-  int indexFunctionSelectedByCursor() const {
-    return *m_indexFunctionSelectedByCursor;
-  }
-  virtual void selectFunctionWithCursor(int functionIndex);
-  virtual double defaultCursorAbscissa();
-private:
-  /* When y auto is ticked, we use a display margin to be ensure that the user
-   * can move the cursor along the curve without panning the window */
-  constexpr static float k_displayTopMarginRatio = 0.09f;
-  constexpr static float k_displayBottomMarginRatio = 0.2f;
-
-  // InteractiveCurveViewController
-  float displayTopMarginRatio() override { return k_displayTopMarginRatio; }
-  float displayBottomMarginRatio() override { return k_displayBottomMarginRatio; }
-  // InteractiveCurveViewRangeDelegate
-  InteractiveCurveViewRangeDelegate::Range computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) override;
-
-  void initRangeParameters() override;
-  void initCursorParameters() override;
-  bool moveCursorVertically(int direction) override;
-  CurveView * curveView() override;
-  uint32_t modelVersion() override;
-  uint32_t rangeVersion() override;
-  bool isCursorVisible() override;
-  virtual FunctionGraphView * functionGraphView() = 0;
-  virtual View * cursorView() = 0;
-  virtual FunctionStore * functionStore() const = 0;
-  virtual FunctionCurveParameterController * curveParameterController() = 0;
-  InitialisationParameterController m_initialisationParameterController;
-  Poincare::Preferences::AngleUnit * m_angleUnitVersion;
-  int * m_indexFunctionSelectedByCursor;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_graph_view.cpp b/apps/shared/function_graph_view.cpp
deleted file mode 100644
index a7a65bad7..000000000
--- a/apps/shared/function_graph_view.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-#include "function_graph_view.h"
-#include <assert.h>
-#include <cmath>
-#include <float.h>
-using namespace Poincare;
-
-namespace Shared {
-
-FunctionGraphView::FunctionGraphView(InteractiveCurveViewRange * graphRange,
-  CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
-  CurveView(graphRange, cursor, bannerView, cursorView),
-  m_selectedFunction(nullptr),
-  m_highlightedStart(NAN),
-  m_highlightedEnd(NAN),
-  m_shouldColorHighlighted(false),
-  m_xLabels{},
-  m_yLabels{},
-  m_context(nullptr)
-{
-}
-
-void FunctionGraphView::drawRect(KDContext * ctx, KDRect rect) const {
-  ctx->fillRect(rect, KDColorWhite);
-  drawGrid(ctx, rect);
-  drawAxes(ctx, rect);
-  simpleDrawBothAxesLabels(ctx, rect);
-}
-
-void FunctionGraphView::setContext(Context * context) {
-  m_context = context;
-}
-
-Context * FunctionGraphView::context() const {
-  return m_context;
-}
-
-void FunctionGraphView::selectFunction(Function * function) {
-  if (m_selectedFunction != function) {
-    m_selectedFunction = function;
-    reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
-  }
-}
-
-void FunctionGraphView::setAreaHighlight(float start, float end) {
-  if (m_highlightedStart != start || m_highlightedEnd != end) {
-    float dirtyStart = start > m_highlightedStart ? m_highlightedStart : start;
-    float dirtyEnd = start > m_highlightedStart ? start : m_highlightedStart;
-    reloadBetweenBounds(dirtyStart, dirtyEnd);
-    dirtyStart = end > m_highlightedEnd ? m_highlightedEnd : end;
-    dirtyEnd = end > m_highlightedEnd ? end : m_highlightedEnd;
-    reloadBetweenBounds(dirtyStart, dirtyEnd);
-    if (std::isnan(start) || std::isnan(end)) {
-      reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
-    }
-    if (std::isnan(m_highlightedStart) || std::isnan(m_highlightedEnd)) {
-      reloadBetweenBounds(start, end);
-    }
-    m_highlightedStart = start;
-    m_highlightedEnd = end;
-  }
-}
-
-void FunctionGraphView::setAreaHighlightColor(bool highlightColor) {
-  if (m_shouldColorHighlighted != highlightColor) {
-    reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
-    m_shouldColorHighlighted = highlightColor;
-  }
-}
-
-char * FunctionGraphView::label(Axis axis, int index) const {
-  return (axis == Axis::Horizontal ? (char *)m_xLabels[index] : (char *)m_yLabels[index]);
-}
-
-void FunctionGraphView::reloadBetweenBounds(float start, float end) {
-  if (start == end) {
-    return;
-  }
-  float pixelLowerBound = floatToPixel(Axis::Horizontal, start)-2.0;
-  float pixelUpperBound = floatToPixel(Axis::Horizontal, end)+4.0;
-  /* We exclude the banner frame from the dirty zone to avoid unnecessary
-   * redrawing */
-  KDRect dirtyZone(KDRect(pixelLowerBound, 0, pixelUpperBound-pixelLowerBound,
-        bounds().height()-m_bannerView->bounds().height()));
-  markRectAsDirty(dirtyZone);
-}
-
-
-}
diff --git a/apps/shared/function_graph_view.h b/apps/shared/function_graph_view.h
deleted file mode 100644
index 34de2e4d2..000000000
--- a/apps/shared/function_graph_view.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef SHARED_FUNCTION_GRAPH_VIEW_H
-#define SHARED_FUNCTION_GRAPH_VIEW_H
-
-#include <escher.h>
-#include "curve_view.h"
-#include "function.h"
-#include "../constant.h"
-#include "interactive_curve_view_range.h"
-
-namespace Shared {
-
-class FunctionGraphView : public CurveView {
-public:
-  FunctionGraphView(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor,
-    BannerView * bannerView, View * cursorView);
-  void drawRect(KDContext * ctx, KDRect rect) const override;
-  void setContext(Poincare::Context * context);
-  Poincare::Context * context() const;
-  void selectFunction(Function * function);
-  void setAreaHighlight(float start, float end);
-  virtual void setAreaHighlightColor(bool highlightColor);
-protected:
-  void reloadBetweenBounds(float start, float end);
-  Function * m_selectedFunction;
-  float m_highlightedStart;
-  float m_highlightedEnd;
-  bool m_shouldColorHighlighted;
-private:
-  char * label(Axis axis, int index) const override;
-  char m_xLabels[k_maxNumberOfXLabels][k_labelBufferMaxSize];
-  char m_yLabels[k_maxNumberOfYLabels][k_labelBufferMaxSize];
-  Poincare::Context * m_context;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_list_controller.cpp b/apps/shared/function_list_controller.cpp
deleted file mode 100644
index bc0790dee..000000000
--- a/apps/shared/function_list_controller.cpp
+++ /dev/null
@@ -1,220 +0,0 @@
-#include "function_list_controller.h"
-#include <assert.h>
-
-namespace Shared {
-
-FunctionListController::FunctionListController(Responder * parentResponder, FunctionStore * functionStore, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
-  ExpressionModelListController(parentResponder, text),
-  ButtonRowDelegate(header, footer),
-  m_functionStore(functionStore),
-  m_selectableTableView(this, this, this, this),
-  m_emptyCell(),
-  m_plotButton(this, I18n::Message::Plot, Invocation([](void * context, void * sender) {
-    FunctionListController * list = (FunctionListController *)context;
-    TabViewController * tabController = list->tabController();
-    tabController->setActiveTab(1);
-    return true;
-  }, this), KDFont::SmallFont, Palette::PurpleBright),
-  m_valuesButton(this, I18n::Message::DisplayValues, Invocation([](void * context, void * sender) {
-    FunctionListController * list = (FunctionListController *)context;
-    TabViewController * tabController = list->tabController();
-    tabController->setActiveTab(2);
-    return true;
-  }, this), KDFont::SmallFont, Palette::PurpleBright)
-{
-  m_selectableTableView.setMargins(0);
-  m_selectableTableView.setVerticalCellOverlap(0);
-}
-
-int FunctionListController::numberOfColumns() {
-  return 2;
-};
-
-KDCoordinate FunctionListController::columnWidth(int i) {
-  switch (i) {
-    case 0:
-      return k_functionNameWidth;
-    case 1:
-      return selectableTableView()->bounds().width() - k_functionNameWidth;
-    default:
-      assert(false);
-      return 0;
-  }
-}
-
-KDCoordinate FunctionListController::cumulatedWidthFromIndex(int i) {
-  switch (i) {
-    case 0:
-      return 0;
-    case 1:
-      return k_functionNameWidth;
-    case 2:
-      return selectableTableView()->bounds().width();
-    default:
-      assert(false);
-      return 0;
-  }
-}
-
-int FunctionListController::indexFromCumulatedWidth(KDCoordinate offsetX) {
-  if (offsetX <= k_functionNameWidth) {
-    return 0;
-  } else {
-    if (offsetX <= selectableTableView()->bounds().width())
-      return 1;
-    else {
-      return 2;
-    }
-  }
-}
-
-int FunctionListController::typeAtLocation(int i, int j) {
-  if (isAddEmptyRow(j)){
-    return i + 2;
-  }
-  return i;
-}
-
-HighlightCell * FunctionListController::reusableCell(int index, int type) {
-  assert(index >= 0);
-  assert(index < maxNumberOfRows());
-  switch (type) {
-    case 0:
-      return titleCells(index);
-    case 1:
-      return expressionCells(index);
-    case 2:
-      return &m_emptyCell;
-    case 3:
-      return &m_addNewModel;
-    default:
-      assert(false);
-      return nullptr;
-  }
-}
-
-int FunctionListController::reusableCellCount(int type) {
-  if (type > 1) {
-    return 1;
-  }
-  return maxNumberOfRows();
-}
-
-void FunctionListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  if (!isAddEmptyRow(j)) {
-    if (i == 0) {
-      willDisplayTitleCellAtIndex(cell, j);
-    } else {
-      willDisplayExpressionCellAtIndex(cell, j);
-    }
-  }
-  EvenOddCell * myCell = (EvenOddCell *)cell;
-  myCell->setEven(j%2 == 0);
-  myCell->setHighlighted(i == selectedColumn() && j == selectedRow());
-  myCell->reloadCell();
-}
-
-int FunctionListController::numberOfButtons(ButtonRowController::Position position) const {
-  if (position == ButtonRowController::Position::Bottom) {
-    return 2;
-  }
-  return 0;
-}
-
-Button * FunctionListController::buttonAtIndex(int index, ButtonRowController::Position position) const {
-  if (position == ButtonRowController::Position::Top) {
-    return nullptr;
-  }
-  const Button * buttons[2] = {&m_plotButton, &m_valuesButton};
-  return (Button *)buttons[index];
-}
-
-void FunctionListController::didBecomeFirstResponder() {
-  if (selectedRow() == -1) {
-    selectCellAtLocation(1, 0);
-  } else {
-    selectCellAtLocation(selectedColumn(), selectedRow());
-  }
-  if (selectedRow() >= numberOfRows()) {
-    selectCellAtLocation(selectedColumn(), numberOfRows()-1);
-  }
-  footer()->setSelectedButton(-1);
-  app()->setFirstResponder(selectableTableView());
-}
-
-bool FunctionListController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Up) {
-    if (selectedRow() == -1) {
-      footer()->setSelectedButton(-1);
-      selectableTableView()->selectCellAtLocation(1, numberOfRows()-1);
-      app()->setFirstResponder(selectableTableView());
-      return true;
-    }
-    selectableTableView()->deselectTable();
-    assert(selectedRow() == -1);
-    app()->setFirstResponder(tabController());
-    return true;
-  }
-  if (event == Ion::Events::Down) {
-    if (selectedRow() == -1) {
-      return false;
-    }
-    selectableTableView()->deselectTable();
-    footer()->setSelectedButton(0);
-    return true;
-  }
-  if (selectedRow() < 0) {
-    return false;
-  }
-  if (selectedColumn() == 1) {
-    return handleEventOnExpression(event);
-  }
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    assert(selectedColumn() == 0);
-    configureFunction(m_functionStore->modelAtIndex(modelIndexForRow(selectedRow())));
-    return true;
-  }
-  if (event == Ion::Events::Backspace) {
-    Shared::Function * function = m_functionStore->modelAtIndex(modelIndexForRow(selectedRow()));
-    if (removeModelRow(function)) {
-      int newSelectedRow = selectedRow() >= numberOfRows() ? numberOfRows()-1 : selectedRow();
-      selectCellAtLocation(selectedColumn(), newSelectedRow);
-      selectableTableView()->reloadData();
-    }
-    return true;
-  }
-  return false;
-}
-
-void FunctionListController::didEnterResponderChain(Responder * previousFirstResponder) {
-  selectableTableView()->reloadData();
-}
-
-void FunctionListController::willExitResponderChain(Responder * nextFirstResponder) {
-  if (nextFirstResponder == tabController()) {
-    selectableTableView()->deselectTable();
-    footer()->setSelectedButton(-1);
-  }
-}
-
-void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
-  if (isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
-    t->selectCellAtLocation(1, numberOfRows()-1);
-  }
-}
-
-StackViewController * FunctionListController::stackController() const{
-  return (StackViewController *)(parentResponder()->parentResponder()->parentResponder());
-}
-
-void FunctionListController::configureFunction(Shared::Function * function) {
-  StackViewController * stack = stackController();
-  parameterController()->setFunction(function);
-  stack->push(parameterController());
-}
-
-TabViewController * FunctionListController::tabController() const{
-  return (TabViewController *)(parentResponder()->parentResponder()->parentResponder()->parentResponder());
-}
-
-}
diff --git a/apps/shared/function_list_controller.h b/apps/shared/function_list_controller.h
deleted file mode 100644
index dc74a4058..000000000
--- a/apps/shared/function_list_controller.h
+++ /dev/null
@@ -1,71 +0,0 @@
-#ifndef SHARED_FUNCTION_LIST_CONTROLLER_H
-#define SHARED_FUNCTION_LIST_CONTROLLER_H
-
-#include <escher.h>
-#include "function_store.h"
-#include "function_app.h"
-#include "list_parameter_controller.h"
-#include "expression_model_list_controller.h"
-#include <apps/i18n.h>
-
-namespace Shared {
-
-class FunctionListController : public ExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource, public SelectableTableViewDelegate {
-public:
-  FunctionListController(Responder * parentResponder, FunctionStore * functionStore, ButtonRowController * header, ButtonRowController * footer, I18n::Message text);
-
-  /* TableViewDataSource */
-  int numberOfRows() override {
-    return numberOfExpressionRows();
-  }
-  int numberOfColumns() override;
-  KDCoordinate rowHeight(int j) override {
-    return expressionRowHeight(j);
-  }
-  KDCoordinate columnWidth(int i) override;
-  KDCoordinate cumulatedWidthFromIndex(int i) override;
-  int indexFromCumulatedWidth(KDCoordinate offsetX) override;
-  int typeAtLocation(int i, int j) override;
-  HighlightCell * reusableCell(int index, int type) override;
-  int reusableCellCount(int type) override;
-  void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
-  /* ButtonRowDelegate */
-  int numberOfButtons(ButtonRowController::Position position) const override;
-  Button * buttonAtIndex(int index, ButtonRowController::Position position) const override;
-  /* Responder */
-  void didBecomeFirstResponder() override;
-  bool handleEvent(Ion::Events::Event event) override;
-  void didEnterResponderChain(Responder * previousFirstResponder) override;
-  void willExitResponderChain(Responder * nextFirstResponder) override;
-  /* ViewController */
-  View * view() override { return &m_selectableTableView; }
-  /* SelectableTableViewDelegate*/
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
-  /* ExpressionModelListController */
-  SelectableTableView * selectableTableView() override { return &m_selectableTableView; }
-protected:
-  StackViewController * stackController() const;
-  void configureFunction(Function * function);
-  FunctionStore * m_functionStore;
-  SelectableTableView m_selectableTableView;
-private:
-  static constexpr KDCoordinate k_functionNameWidth = 65;
-  TabViewController * tabController() const;
-  ExpressionModelStore * modelStore() override { return m_functionStore; }
-  InputViewController * inputController() override {
-    FunctionApp * myApp = static_cast<FunctionApp *>(app());
-    return myApp->inputViewController();
-  }
-  virtual ListParameterController * parameterController() = 0;
-  virtual int maxNumberOfRows() = 0;
-  virtual HighlightCell * titleCells(int index) = 0;
-  virtual HighlightCell * expressionCells(int index) = 0;
-  virtual void willDisplayTitleCellAtIndex(HighlightCell * cell, int j) = 0;
-  EvenOddCell m_emptyCell;
-  Button m_plotButton;
-  Button m_valuesButton;
-};
-
-}
-
-#endif
diff --git a/apps/shared/function_store.cpp b/apps/shared/function_store.cpp
deleted file mode 100644
index d3ab5ca64..000000000
--- a/apps/shared/function_store.cpp
+++ /dev/null
@@ -1,58 +0,0 @@
-#include "function_store.h"
-#include <assert.h>
-
-namespace Shared {
-
-FunctionStore::FunctionStore() :
-  ExpressionModelStore()
-{
-}
-
-Function * FunctionStore::activeFunctionAtIndex(int i) {
-  assert(i >= 0 && i < numberOfActiveFunctions());
-  int index = 0;
-  for (int k = 0; k < m_numberOfModels; k++) {
-    Function * function = modelAtIndex(k);
-    if (function->isActive() && function->isDefined()) {
-      if (i == index) {
-        return function;
-      }
-      index++;
-    }
-  }
-  assert(false);
-  return nullptr;
-}
-
-int FunctionStore::numberOfActiveFunctions() {
-  int result = 0;
-  for (int i = 0; i < m_numberOfModels; i++) {
-    Function * function = modelAtIndex(i);
-    if (function->isDefined() && function->isActive()) {
-      result++;
-    }
-  }
-  return result;
-}
-
-template<typename T>
-T FunctionStore::firstAvailableAttribute(T attributes[], AttributeGetter<T> attribute) {
-  for (int k = 0; k < maxNumberOfModels(); k++) {
-    int j = 0;
-    while  (j < m_numberOfModels) {
-      if (attribute(modelAtIndex(j)) == attributes[k]) {
-        break;
-      }
-      j++;
-    }
-    if (j == m_numberOfModels) {
-      return attributes[k];
-    }
-  }
-  return attributes[0];
-}
-
-}
-
-template char const* const Shared::FunctionStore::firstAvailableAttribute<char const* const>(char const* const*, char const* const (*)(Shared::Function*));
-template KDColor const Shared::FunctionStore::firstAvailableAttribute<KDColor const>(KDColor const*, KDColor const (*)(Shared::Function*));
diff --git a/apps/shared/function_store.h b/apps/shared/function_store.h
deleted file mode 100644
index 1628332ee..000000000
--- a/apps/shared/function_store.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef SHARED_FUNCTION_STORE_H
-#define SHARED_FUNCTION_STORE_H
-
-#include "function.h"
-#include "expression_model_store.h"
-#include <stdint.h>
-
-namespace Shared {
-
-/* FunctionStore is a dumb class.
- * Its only job is to store functions and to give them a color. */
-
-class FunctionStore : public ExpressionModelStore {
-public:
-  FunctionStore();
-  virtual uint32_t storeChecksum() = 0;
-  virtual Function * modelAtIndex(int i) override = 0;
-  virtual Function * activeFunctionAtIndex(int i);
-  virtual Function * definedFunctionAtIndex(int i) { return static_cast<Function *>(definedModelAtIndex(i)); }
-  // An active function must be defined to be counted
-  int numberOfActiveFunctions();
-  virtual char symbol() const = 0;
-protected:
-  static const char * const name(Shared::Function * f) { return f->name(); }
-  static KDColor const color(Shared::Function * f) { return f->color(); }
-  template<typename T> using AttributeGetter = T (*)(Function * f);
-  template<typename T> T firstAvailableAttribute(T attributes[], AttributeGetter<T> attribute);
-  const KDColor firstAvailableColor() {
-    return firstAvailableAttribute(Palette::DataColor, FunctionStore::color);
-  }
-private:
-  virtual const char * firstAvailableName() = 0;
-};
-
-}
-
-#endif
diff --git a/apps/shared/list_parameter_controller.cpp b/apps/shared/list_parameter_controller.cpp
deleted file mode 100644
index 845112371..000000000
--- a/apps/shared/list_parameter_controller.cpp
+++ /dev/null
@@ -1,124 +0,0 @@
-#include "list_parameter_controller.h"
-#include <assert.h>
-
-namespace Shared {
-
-ListParameterController::ListParameterController(Responder * parentResponder, FunctionStore * functionStore, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate) :
-  ViewController(parentResponder),
-  m_selectableTableView(this, this, this, tableDelegate),
-  m_functionStore(functionStore),
-  m_function(nullptr),
-#if FUNCTION_COLOR_CHOICE
-  m_colorCell(functionColorMessage),
-#endif
-  m_enableCell(I18n::Message::ActivateDeactivate),
-  m_deleteCell(deleteFunctionMessage)
-{
-}
-
-const char * ListParameterController::title() {
-  return I18n::translate(I18n::Message::FunctionOptions);
-}
-
-View * ListParameterController::view() {
-  return &m_selectableTableView;
-}
-
-void ListParameterController::didBecomeFirstResponder() {
-  app()->setFirstResponder(&m_selectableTableView);
-}
-
-void ListParameterController::viewWillAppear() {
-  ViewController::viewWillAppear();
-  if (selectedRow() == -1) {
-    selectCellAtLocation(0, 0);
-  } else {
-    selectCellAtLocation(selectedColumn(), selectedRow());
-  }
-  m_selectableTableView.reloadData();
-}
-
-void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
-  if (cell == &m_enableCell) {
-    SwitchView * switchView = (SwitchView *)m_enableCell.accessoryView();
-    switchView->setState(m_function->isActive());
-  }
-}
-
-void ListParameterController::setFunction(Function * function) {
-  m_function = function;
-  selectCellAtLocation(0, 0);
-}
-
-bool ListParameterController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    return handleEnterOnRow(selectedRow());
-  }
-  return false;
-}
-
-int ListParameterController::numberOfRows() {
-  return k_totalNumberOfCell;
-};
-
-HighlightCell * ListParameterController::reusableCell(int index) {
-  assert(index >= 0);
-  assert(index < k_totalNumberOfCell);
-#if FUNCTION_COLOR_CHOICE
-  HighlightCell * cells[] = {&m_colorCell, &m_enableCell, &m_deleteCell};
-#else
-  HighlightCell * cells[] = {&m_enableCell, &m_deleteCell};
-#endif
-  return cells[index];
-}
-
-int ListParameterController::reusableCellCount() {
-  return k_totalNumberOfCell;
-}
-
-KDCoordinate ListParameterController::cellHeight() {
-  return Metric::ParameterCellHeight;
-}
-
-bool ListParameterController::handleEnterOnRow(int rowIndex) {
-  switch (rowIndex) {
-#if FUNCTION_COLOR_CHOICE
-    case 0:
-    /* TODO: implement function color choice */
-      return true;
-    case 1:
-#else
-    case 0:
-#endif
-      m_function->setActive(!m_function->isActive());
-      m_selectableTableView.reloadData();
-      return true;
-#if FUNCTION_COLOR_CHOICE
-      case 2:
-#else
-      case 1:
-#endif
-    {
-      if (m_functionStore->numberOfModels() > 1) {
-        m_functionStore->removeModel(m_function);
-        StackViewController * stack = (StackViewController *)(parentResponder());
-        stack->pop();
-        return true;
-      } else {
-        if (m_functionStore->numberOfDefinedModels() == 1) {
-          Function * f = m_functionStore->definedFunctionAtIndex(0);
-          f->setContent("");
-          StackViewController * stack = (StackViewController *)(parentResponder());
-          stack->pop();
-          return true;
-        }
-        app()->displayWarning(I18n::Message::NoFunctionToDelete);
-        return true;
-      }
-  }
-  default:
-    return false;
-  }
-}
-
-}
diff --git a/apps/shared/list_parameter_controller.h b/apps/shared/list_parameter_controller.h
deleted file mode 100644
index 4bde78f7f..000000000
--- a/apps/shared/list_parameter_controller.h
+++ /dev/null
@@ -1,44 +0,0 @@
-#ifndef SHARED_LIST_PARAM_CONTROLLER_H
-#define SHARED_LIST_PARAM_CONTROLLER_H
-
-#include <escher.h>
-#include "function.h"
-#include "function_store.h"
-#include <apps/i18n.h>
-
-namespace Shared {
-
-class ListParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
-public:
-  ListParameterController(Responder * parentResponder, FunctionStore * functionStore, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr);
-
-  View * view() override;
-  const char * title() override;
-  bool handleEvent(Ion::Events::Event event) override;
-  virtual void setFunction(Function * function);
-  void didBecomeFirstResponder() override;
-  void viewWillAppear() override;
-  int numberOfRows() override;
-  KDCoordinate cellHeight() override;
-  HighlightCell * reusableCell(int index) override;
-  int reusableCellCount() override;
-  void willDisplayCellForIndex(HighlightCell * cell, int index) override;
-protected:
-  bool handleEnterOnRow(int rowIndex);
-  SelectableTableView m_selectableTableView;
-  FunctionStore * m_functionStore;
-  Function * m_function;
-private:
-#if FUNCTION_COLOR_CHOICE
-  constexpr static int k_totalNumberOfCell = 3;
-  MessageTableCellWithChevron m_colorCell;
-#else
-  constexpr static int k_totalNumberOfCell = 2;
-#endif
-  MessageTableCellWithSwitch m_enableCell;
-  MessageTableCell m_deleteCell;
-};
-
-}
-
-#endif
diff --git a/apps/shared/storage_function_curve_parameter_controller.h b/apps/shared/storage_function_curve_parameter_controller.h
index 834c49b02..e88f9a4ec 100644
--- a/apps/shared/storage_function_curve_parameter_controller.h
+++ b/apps/shared/storage_function_curve_parameter_controller.h
@@ -3,7 +3,6 @@
 
 #include <escher.h>
 #include "storage_function_go_to_parameter_controller.h"
-#include "function.h"
 #include "curve_view_cursor.h"
 #include "interactive_curve_view_range.h"
 
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/storage_function_list_controller.h
index fc9633d69..3f57a1d96 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/storage_function_list_controller.h
@@ -3,7 +3,6 @@
 
 #include <escher.h>
 #include "storage_function_store.h"
-#include "function_app.h"
 #include "function_title_cell.h"
 #include "storage_list_parameter_controller.h"
 #include "storage_expression_model_list_controller.h"
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
deleted file mode 100644
index 88311d378..000000000
--- a/apps/shared/sum_graph_controller.cpp
+++ /dev/null
@@ -1,332 +0,0 @@
-#include "sum_graph_controller.h"
-#include "../apps_container.h"
-#include <poincare/layout_helper.h>
-#include "poincare_helpers.h"
-#include <poincare/empty_layout.h>
-#include <poincare/condensed_sum_layout.h>
-
-#include <assert.h>
-#include <cmath>
-#include <stdlib.h>
-
-using namespace Poincare;
-
-namespace Shared {
-
-SumGraphController::SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
-  SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
-  m_step(Step::FirstParameter),
-  m_startSum(NAN),
-  m_endSum(NAN),
-  m_function(nullptr),
-  m_graphRange(range),
-  m_graphView(graphView),
-  m_legendView(this, inputEventHandlerDelegate, sumSymbol),
-  m_cursorView()
-{
-}
-
-void SumGraphController::viewWillAppear() {
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
-  m_graphView->setBannerView(&m_legendView);
-  m_graphView->setCursorView(&m_cursorView);
-  m_graphView->setOkView(nullptr);
-  m_graphView->selectMainView(true);
-  m_graphView->setAreaHighlightColor(false);
-  m_graphView->setAreaHighlight(NAN, NAN);
-  m_graphView->reload();
-
-  m_startSum = m_cursor->x();
-  m_endSum = NAN;
-  m_step = Step::FirstParameter;
-  m_legendView.setLegendMessage(legendMessageAtStep(Step::FirstParameter), Step::FirstParameter);
-  m_legendView.setEditableZone(m_startSum);
-  m_legendView.setSumSymbol(m_step);
-}
-
-
-void SumGraphController::didEnterResponderChain(Responder * previousFirstResponder) {
-  app()->setFirstResponder(m_legendView.textField());
-}
-
-bool SumGraphController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Plus || event == Ion::Events::Minus) {
-    return handleZoom(event);
-  }
-  if ((int)m_step > 1 && event != Ion::Events::OK && event != Ion::Events::EXE && event != Ion::Events::Back) {
-    return false;
-  }
-  if (event == Ion::Events::Left) {
-    if ((int)m_step > 0 && m_startSum >= m_cursor->x()) {
-      return false;
-    }
-    if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), -1))) {
-      m_graphView->reload();
-      return true;
-    }
-    return false;
-  }
-  if (event == Ion::Events::Right) {
-    if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), 1))) {
-      m_graphView->reload();
-      return true;
-    }
-    return false;
-  }
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    return handleEnter();
-  }
-  if (event == Ion::Events::Back && (int)m_step > 0) {
-    m_step = (Step)((int)m_step-1);
-    m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
-    if (m_step == Step::SecondParameter) {
-      app()->setFirstResponder(m_legendView.textField());
-      m_graphView->setAreaHighlightColor(false);
-      m_graphView->setCursorView(&m_cursorView);
-      m_endSum = m_cursor->x();
-      m_legendView.setEditableZone(m_endSum);
-      m_legendView.setSumSymbol(m_step, m_startSum);
-    }
-    if (m_step == Step::FirstParameter) {
-      m_graphView->setAreaHighlight(NAN,NAN);
-      moveCursorHorizontallyToPosition(m_startSum);
-      m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
-      m_legendView.setEditableZone(m_startSum);
-      m_legendView.setSumSymbol(m_step);
-      m_graphView->reload();
-    }
-    return true;
-  }
-  return false;
-}
-
-bool SumGraphController::moveCursorHorizontallyToPosition(double x) {
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  if (m_function == nullptr) {
-    return false;
-  }
-  double y = m_function->evaluateAtAbscissa(x, myApp->localContext());
-  m_cursor->moveTo(x, y);
-  if (m_step == Step::FirstParameter) {
-    m_startSum = m_cursor->x();
-    m_legendView.setEditableZone(m_startSum);
-  }
-  if (m_step == Step::SecondParameter) {
-    m_graphView->setAreaHighlight(m_startSum, m_cursor->x());
-    m_endSum = m_cursor->x();
-    m_legendView.setEditableZone(m_endSum);
-  }
-  m_graphRange->panToMakePointVisible(x, y, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
-  return true;
-}
-
-void SumGraphController::setFunction(Function * function) {
-  m_graphView->selectFunction(function);
-  m_function = function;
-}
-
-bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
-    return false;
-  }
-  if (m_step == Step::SecondParameter && floatBody < m_startSum) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
-  if (moveCursorHorizontallyToPosition(floatBody)) {
-    handleEnter();
-    m_graphView->reload();
-    return true;
-  }
-  app()->displayWarning(I18n::Message::ForbiddenValue);
-  return false;
-}
-
-bool SumGraphController::textFieldDidAbortEditing(TextField * textField) {
-  char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
-  double parameter = NAN;
-  switch(m_step) {
-    case Step::FirstParameter:
-      parameter = m_startSum;
-      break;
-    case Step::SecondParameter:
-      parameter = m_endSum;
-      break;
-    default:
-      assert(false);
-  }
-  PrintFloat::convertFloatToText<double>(parameter, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-  textField->setText(buffer);
-  return true;
-}
-
-bool SumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
-  if ((event == Ion::Events::OK || event == Ion::Events::EXE) && !textField->isEditing()) {
-    return handleEnter();
-  }
-  if (m_step == Step::Result) {
-    return handleEvent(event);
-  }
-  return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
-}
-
-bool SumGraphController::handleEnter() {
-  if (m_step == Step::Result) {
-    StackViewController * stack = (StackViewController *)parentResponder();
-    stack->pop();
-    return true;
-  }
-  if (m_step == Step::FirstParameter) {
-    m_step = Step::SecondParameter;
-    m_graphView->setAreaHighlight(m_startSum,m_startSum);
-    m_endSum = m_cursor->x();
-    m_legendView.setEditableZone(m_endSum);
-    m_legendView.setSumSymbol(m_step, m_startSum);
-    m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
-    return true;
-  }
-  m_step = (Step)((int)m_step+1);
-  TextFieldDelegateApp * myApp = static_cast<TextFieldDelegateApp *>(app());
-  double sum = m_function->sumBetweenBounds(m_startSum, m_endSum, myApp->localContext());
-  m_legendView.setSumSymbol(m_step, m_startSum, m_endSum, sum, createFunctionLayout(m_function->name()));
-  m_legendView.setLegendMessage(I18n::Message::Default, m_step);
-  m_graphView->setAreaHighlightColor(true);
-  m_graphView->setCursorView(nullptr);
-  myApp->setFirstResponder(this);
-  return true;
-}
-
-/* Legend View */
-
-SumGraphController::LegendView::LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
-  m_sum(0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_sumLayout(),
-  m_legend(KDFont::SmallFont, I18n::Message::Default, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_editableZone(controller, m_draftText, m_draftText, TextField::maxBufferSize(), inputEventHandlerDelegate, controller, false, KDFont::SmallFont, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_sumSymbol(sumSymbol)
-{
-  m_draftText[0] = 0;
-}
-
-void SumGraphController::LegendView::drawRect(KDContext * ctx, KDRect rect) const {
-  ctx->fillRect(bounds(), Palette::GreyMiddle);
-}
-
-KDSize SumGraphController::LegendView::minimalSizeForOptimalDisplay() const {
-  return KDSize(0, k_legendHeight);
-}
-
-void SumGraphController::LegendView::setLegendMessage(I18n::Message message, Step step) {
-  m_legend.setMessage(message);
-  layoutSubviews(step);
-}
-
-void SumGraphController::LegendView::setEditableZone(double d) {
-  char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
-  PrintFloat::convertFloatToText<double>(d, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
- m_editableZone.setText(buffer);
-}
-
-void SumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
-  assert(step == Step::Result || functionLayout.isUninitialized());
-  constexpr int sigmaSize = 2;
-  const CodePoint sigma[sigmaSize] = {UCodePointSpace, m_sumSymbol};
-  if (step == Step::FirstParameter) {
-    m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaSize);
-  } else if (step == Step::SecondParameter) {
-    char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
-    PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sigmaSize),
-        LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont),
-        EmptyLayout::Builder(EmptyLayoutNode::Color::Yellow, false, KDFont::SmallFont, false));
-  } else {
-    constexpr size_t bufferSize = 2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
-    char buffer[bufferSize];
-    PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    Layout start = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
-    PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    Layout end = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
-    m_sumLayout = CondensedSumLayout::Builder(
-        LayoutHelper::CodePointString(sigma, sigmaSize),
-        start,
-        end);
-    strlcpy(buffer, "= ", bufferSize);
-    PoincareHelpers::ConvertFloatToText<double>(result, buffer+2, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
-    m_sumLayout = HorizontalLayout::Builder(
-        m_sumLayout,
-        functionLayout,
-        LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont));
-  }
-  m_sum.setLayout(m_sumLayout);
-  if (step == Step::Result) {
-    m_sum.setAlignment(0.5f, 0.5f);
-  } else {
-    m_sum.setAlignment(0.0f, 0.5f);
-  }
-  layoutSubviews(step);
-}
-
-int SumGraphController::LegendView::numberOfSubviews() const {
-  return 3;
-}
-
-View * SumGraphController::LegendView::subviewAtIndex(int index) {
-  assert(index >= 0 && index < 3);
-  if (index == 0) {
-    return &m_sum;
-  }
-  if (index == 1) {
-    return &m_editableZone;
-  }
-  return &m_legend;
-}
-
-void SumGraphController::LegendView::layoutSubviews() {
-  layoutSubviews(Step::FirstParameter);
-}
-
-void SumGraphController::LegendView::layoutSubviews(Step step) {
-  KDCoordinate width = bounds().width();
-  KDCoordinate heigth = bounds().height();
-  KDSize legendSize = m_legend.minimalSizeForOptimalDisplay();
-
-  if (legendSize.width() > 0) {
-    m_sum.setFrame(KDRect(0, k_symbolHeightMargin, width-legendSize.width(), m_sum.minimalSizeForOptimalDisplay().height()));
-    m_legend.setFrame(KDRect(width-legendSize.width(), 0, legendSize.width(), heigth));
-  } else {
-    m_sum.setFrame(bounds());
-    m_legend.setFrame(KDRectZero);
-  }
-
-  KDCoordinate largeGlyphWidth = KDFont::LargeFont->glyphSize().width();
-  KDCoordinate editableZoneWidth = 12 * KDFont::SmallFont->glyphSize().width();
-  KDCoordinate editableZoneHeight = KDFont::SmallFont->glyphSize().height();
-
-  switch(step) {
-    case Step::FirstParameter:
-      m_editableZone.setFrame(KDRect(
-        2 * largeGlyphWidth,
-        k_symbolHeightMargin + k_sigmaHeight/2,
-        editableZoneWidth,
-        editableZoneHeight
-      ));
-      return;
-    case Step::SecondParameter:
-      m_editableZone.setFrame(KDRect(
-        2 * largeGlyphWidth,
-        k_symbolHeightMargin + k_sigmaHeight/2 - editableZoneHeight,
-        editableZoneWidth,
-        editableZoneHeight
-      ));
-      return;
-    default:
-      m_editableZone.setFrame(KDRectZero);
-  }
-}
-
-}
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
deleted file mode 100644
index 595f9f4bc..000000000
--- a/apps/shared/sum_graph_controller.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef SHARED_SUM_GRAPH_CONTROLLER_H
-#define SHARED_SUM_GRAPH_CONTROLLER_H
-
-#include <escher.h>
-#include "function_graph_view.h"
-#include "interactive_curve_view_range.h"
-#include "vertical_cursor_view.h"
-#include "curve_view_cursor.h"
-#include "simple_interactive_curve_view_controller.h"
-#include "function.h"
-#include "text_field_delegate.h"
-
-namespace Shared {
-
-class SumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
-public:
-  SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
-  void viewWillAppear() override;
-  void didEnterResponderChain(Responder * previousFirstResponder) override;
-  bool handleEvent(Ion::Events::Event event) override;
-  void setFunction(Function * function);
-  bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
-  bool textFieldDidAbortEditing(TextField * textField) override;
-  bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
-protected:
-  virtual bool moveCursorHorizontallyToPosition(double position);
-  enum class Step {
-    FirstParameter = 0,
-    SecondParameter = 1,
-    Result = 2
-  };
-  Step m_step;
-  double m_startSum;
-  double m_endSum;
-  Function * m_function;
-  InteractiveCurveViewRange * m_graphRange;
-private:
-  constexpr static float k_cursorTopMarginRatio = 0.06f;   // (cursorHeight/2)/graphViewHeight
-  constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
-  virtual I18n::Message legendMessageAtStep(Step step) = 0;
-  virtual double cursorNextStep(double position, int direction) = 0;
-  virtual Poincare::Layout createFunctionLayout(const char * functionName) = 0;
-  Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
-  Shared::CurveView * curveView() override { return m_graphView; }
-  TextFieldDelegateApp * textFieldDelegateApp() override {
-    return static_cast<TextFieldDelegateApp *>(app());
-  }
-  bool handleEnter() override;
-  class LegendView : public View {
-  public:
-    LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
-    LegendView(const LegendView& other) = delete;
-    LegendView(LegendView&& other) = delete;
-    LegendView& operator=(const LegendView& other) = delete;
-    LegendView& operator=(LegendView&& other) = delete;
-    TextField * textField() { return &m_editableZone; }
-    KDSize minimalSizeForOptimalDisplay() const override;
-    void drawRect(KDContext * ctx, KDRect rect) const override;
-    void setLegendMessage(I18n::Message message, Step step);
-    void setEditableZone(double d);
-    void setSumSymbol(Step step, double start = NAN, double end = NAN, double result = NAN, Poincare::Layout sequenceName = Poincare::Layout());
-  private:
-    constexpr static KDCoordinate k_legendHeight = 35;
-    constexpr static KDCoordinate k_symbolHeightMargin = 8;
-    constexpr static KDCoordinate k_sigmaHeight = 18;
-    int numberOfSubviews() const override;
-    View * subviewAtIndex(int index) override;
-    void layoutSubviews() override;
-    void layoutSubviews(Step step);
-    ExpressionView m_sum;
-    Poincare::Layout m_sumLayout;
-    MessageTextView m_legend;
-    TextField m_editableZone;
-    char m_draftText[TextField::maxBufferSize()];
-    CodePoint m_sumSymbol;
-  };
-  FunctionGraphView * m_graphView;
-  LegendView m_legendView;
-  VerticalCursorView m_cursorView;
-};
-
-}
-
-#endif
diff --git a/apps/shared/values_controller.cpp b/apps/shared/values_controller.cpp
deleted file mode 100644
index 5d8091cb9..000000000
--- a/apps/shared/values_controller.cpp
+++ /dev/null
@@ -1,322 +0,0 @@
-#include "values_controller.h"
-#include "text_field_delegate_app.h"
-#include "../constant.h"
-#include "../apps_container.h"
-#include "poincare_helpers.h"
-#include <assert.h>
-
-using namespace Poincare;
-
-namespace Shared {
-
-ValuesController::ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval) :
-  EditableCellTableViewController(parentResponder),
-  ButtonRowDelegate(header, nullptr),
-  m_interval(interval),
-  m_numberOfColumns(0),
-  m_numberOfColumnsNeedUpdate(true),
-  m_selectableTableView(this),
-  m_abscissaTitleCell(),
-  m_abscissaCells{},
-  m_abscissaParameterController(this, intervalParameterController, parameterTitle),
-  m_setIntervalButton(this, I18n::Message::IntervalSet, Invocation([](void * context, void * sender) {
-    ValuesController * valuesController = (ValuesController *) context;
-    StackViewController * stack = ((StackViewController *)valuesController->stackController());
-    stack->push(valuesController->intervalParameterController());
-    return true;
-  }, this), KDFont::SmallFont)
-{
-  m_selectableTableView.setVerticalCellOverlap(0);
-  m_selectableTableView.setTopMargin(k_topMargin);
-  m_selectableTableView.setRightMargin(k_rightMargin);
-  m_selectableTableView.setBottomMargin(k_bottomMargin);
-  m_selectableTableView.setLeftMargin(k_leftMargin);
-  m_selectableTableView.setBackgroundColor(Palette::WallScreenDark);
-  m_abscissaTitleCell.setMessageFont(KDFont::SmallFont);
-  for (int i = 0; i < k_maxNumberOfAbscissaCells; i++) {
-    m_abscissaCells[i].setParentResponder(&m_selectableTableView);
-    m_abscissaCells[i].editableTextCell()->textField()->setDelegates(inputEventHandlerDelegate, this);
-    m_abscissaCells[i].editableTextCell()->textField()->setDraftTextBuffer(m_draftTextBuffer);
-    m_abscissaCells[i].editableTextCell()->textField()->setFont(KDFont::SmallFont);
-  }
-}
-
-const char * ValuesController::title() {
-  return I18n::translate(I18n::Message::ValuesTab);
-}
-
-int ValuesController::numberOfColumns() {
-  if (m_numberOfColumnsNeedUpdate) {
-    updateNumberOfColumns();
-    m_numberOfColumnsNeedUpdate = false;
-  }
-  return m_numberOfColumns;
-}
-
-Interval * ValuesController::interval() {
-  return m_interval;
-}
-
-bool ValuesController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Down) {
-    if (selectedRow() == -1) {
-      header()->setSelectedButton(-1);
-      selectableTableView()->selectCellAtLocation(0,0);
-      app()->setFirstResponder(selectableTableView());
-      return true;
-    }
-    return false;
-  }
-
-  if (event == Ion::Events::Up) {
-    if (selectedRow() == -1) {
-      header()->setSelectedButton(-1);
-      app()->setFirstResponder(tabController());
-      return true;
-    }
-    selectableTableView()->deselectTable();
-    header()->setSelectedButton(0);
-    return true;
-  }
-  if (event == Ion::Events::Backspace && selectedRow() > 0 &&
-      (selectedRow() < numberOfRows()-1 || m_interval->numberOfElements() == Interval::k_maxNumberOfElements)) {
-    m_interval->deleteElementAtIndex(selectedRow()-1);
-    selectableTableView()->reloadData();
-    return true;
-  }
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    if (selectedRow() == -1) {
-      return header()->handleEvent(event);
-    }
-    if (selectedRow() == 0) {
-      if (selectedColumn() == 0) {
-        configureAbscissa();
-        return true;
-      }
-      configureFunction();
-      return true;
-    }
-    return false;
-  }
-  if (selectedRow() == -1) {
-    return header()->handleEvent(event);
-  }
-  return false;
-}
-
-void ValuesController::didBecomeFirstResponder() {
-  EditableCellTableViewController::didBecomeFirstResponder();
-  if (selectedRow() == -1) {
-    selectableTableView()->deselectTable();
-    header()->setSelectedButton(0);
-  } else {
-    header()->setSelectedButton(-1);
-  }
-}
-
-void ValuesController::willExitResponderChain(Responder * nextFirstResponder) {
-  if (nextFirstResponder == tabController()) {
-    selectableTableView()->deselectTable();
-    selectableTableView()->scrollToCell(0,0);
-    header()->setSelectedButton(-1);
-  }
-}
-
-int ValuesController::numberOfButtons(ButtonRowController::Position) const {
-  if (isEmpty()) {
-    return 0;
-  }
-  return 1;
-}
-
-Button * ValuesController::buttonAtIndex(int index, ButtonRowController::Position position) const {
-  return (Button *)&m_setIntervalButton;
-}
-
-void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  willDisplayCellAtLocationWithDisplayMode(cell, i, j, Preferences::sharedPreferences()->displayMode());
-  if (cellAtLocationIsEditable(i, j)) {
-    return;
-  }
-  // The cell is not a title cell and not editable
-  if (j > 0 && i > 0) {
-    char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
-    // Special case: last row
-    if (j == numberOfRows() - 1) {
-      int numberOfIntervalElements = m_interval->numberOfElements();
-      if (numberOfIntervalElements < Interval::k_maxNumberOfElements) {
-        buffer[0] = 0;
-        EvenOddBufferTextCell * myValueCell = (EvenOddBufferTextCell *)cell;
-        myValueCell->setText(buffer);
-        return;
-      }
-    }
-    // The cell is a value cell
-    EvenOddBufferTextCell * myValueCell = (EvenOddBufferTextCell *)cell;
-    double x = m_interval->element(j-1);
-    PoincareHelpers::ConvertFloatToText<double>(evaluationOfAbscissaAtColumn(x, i), buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
-  myValueCell->setText(buffer);
-  }
-}
-
-KDCoordinate ValuesController::columnWidth(int i) {
-  switch (i) {
-    case 0:
-      return k_abscissaCellWidth;
-    default:
-      return k_ordinateCellWidth;
-  }
-}
-
-KDCoordinate ValuesController::cumulatedWidthFromIndex(int i) {
-  if (i == 0) {
-    return 0;
-  } else {
-    return k_abscissaCellWidth + (i-1)*k_ordinateCellWidth;
-  }
-}
-
-int ValuesController::indexFromCumulatedWidth(KDCoordinate offsetX) {
-  if (offsetX <= k_abscissaCellWidth) {
-    return 0;
-  }
-  return (offsetX - k_abscissaCellWidth)/k_ordinateCellWidth+1;
-}
-
-HighlightCell * ValuesController::reusableCell(int index, int type) {
-  assert(index >= 0);
-  switch (type) {
-    case 0:
-      assert(index == 0);
-      return &m_abscissaTitleCell;
-    case 1:
-      return functionTitleCells(index);
-    case 2:
-      assert(index < k_maxNumberOfAbscissaCells);
-      return &m_abscissaCells[index];
-    case 3:
-      return floatCells(index);
-    default:
-      assert(false);
-      return nullptr;
-  }
-}
-
-int ValuesController::reusableCellCount(int type) {
-  switch (type) {
-    case 0:
-      return 1;
-    case 1:
-      return maxNumberOfFunctions();
-    case 2:
-      return k_maxNumberOfAbscissaCells;
-    case 3:
-      return maxNumberOfCells();
-    default:
-      assert(false);
-      return 0;
-  }
-}
-
-int ValuesController::typeAtLocation(int i, int j) {
-  if (j == 0) {
-    if (i == 0) {
-      return 0;
-    }
-    return 1;
-  }
-  if (i == 0) {
-    return 2;
-  }
-  return 3;
-}
-
-bool ValuesController::isEmpty() const {
-  if (functionStore()->numberOfActiveFunctions() == 0) {
-    return true;
-  }
-  return false;
-}
-
-Responder * ValuesController::defaultController() {
-  return tabController();
-}
-
-void ValuesController::viewWillAppear() {
-  EditableCellTableViewController::viewWillAppear();
-  header()->setSelectedButton(-1);
-}
-
-void ValuesController::viewDidDisappear() {
-  m_numberOfColumnsNeedUpdate = true;
-  EditableCellTableViewController::viewDidDisappear();
-}
-
-Function * ValuesController::functionAtColumn(int i) {
-  assert(i > 0);
-  return functionStore()->activeFunctionAtIndex(i-1);
-}
-
-Responder * ValuesController::tabController() const {
-  return (parentResponder()->parentResponder()->parentResponder()->parentResponder());
-}
-
-StackViewController * ValuesController::stackController() const {
-  return (StackViewController *)(parentResponder()->parentResponder()->parentResponder());
-}
-
-void ValuesController::configureAbscissa() {
-  StackViewController * stack = stackController();
-  stack->push(&m_abscissaParameterController);
-}
-
-void ValuesController::configureFunction() {
-#if COPY_COLUMN
-#else
-  /* Temporary: the sequence value controller does not have a function parameter
-   * controller yet but it shoult come soon. */
-  if (functionParameterController() == nullptr) {
-    return;
-  }
-#endif
-  functionParameterController()->setFunction(functionAtColumn(selectedColumn()));
-  StackViewController * stack = stackController();
-  stack->push(functionParameterController());
-}
-
-bool ValuesController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
-  if (rowIndex > 0 && columnIndex == 0) {
-    return true;
-  }
-  return false;
-}
-
-bool ValuesController::setDataAtLocation(double floatBody, int columnIndex, int rowIndex) {
-  m_interval->setElement(rowIndex-1, floatBody);
-  return true;
-}
-
-double ValuesController::dataAtLocation(int columnIndex, int rowIndex) {
-  return m_interval->element(rowIndex-1);
-}
-
-int ValuesController::numberOfElements() {
-  return m_interval->numberOfElements();
-}
-
-int ValuesController::maxNumberOfElements() const {
-  return Interval::k_maxNumberOfElements;
-}
-
-double ValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
-  Function * function = functionAtColumn(columnIndex);
-  TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
-  return function->evaluateAtAbscissa(abscissa, myApp->localContext());
-}
-
-void ValuesController::updateNumberOfColumns() {
-    m_numberOfColumns = 1+functionStore()->numberOfActiveFunctions();
-}
-
-}
-
diff --git a/apps/shared/values_controller.h b/apps/shared/values_controller.h
deleted file mode 100644
index 2eca47217..000000000
--- a/apps/shared/values_controller.h
+++ /dev/null
@@ -1,81 +0,0 @@
-#ifndef SHARED_VALUES_CONTROLLER_H
-#define SHARED_VALUES_CONTROLLER_H
-
-#include <escher.h>
-#include "function_store.h"
-#include "function_title_cell.h"
-#include "editable_cell_table_view_controller.h"
-#include "interval.h"
-#include "values_parameter_controller.h"
-#include "values_function_parameter_controller.h"
-#include "interval_parameter_controller.h"
-#include <apps/i18n.h>
-
-namespace Shared {
-
-class ValuesController : public EditableCellTableViewController, public ButtonRowDelegate,  public AlternateEmptyViewDefaultDelegate {
-public:
-  ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval);
-  const char * title() override;
-  Interval * interval();
-  int numberOfColumns() override;
-  virtual bool handleEvent(Ion::Events::Event event) override;
-  void didBecomeFirstResponder() override;
-  void willExitResponderChain(Responder * nextFirstResponder) override;
-  virtual IntervalParameterController * intervalParameterController() = 0;
-  int numberOfButtons(ButtonRowController::Position) const override;
-  Button * buttonAtIndex(int index, ButtonRowController::Position position) const override;
-  virtual void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
-  KDCoordinate columnWidth(int i) override;
-  KDCoordinate cumulatedWidthFromIndex(int i) override;
-  int indexFromCumulatedWidth(KDCoordinate offsetX) override;
-  HighlightCell * reusableCell(int index, int type) override;
-  int reusableCellCount(int type) override;
-  int typeAtLocation(int i, int j) override;
-  bool isEmpty() const override;
-  Responder * defaultController() override;
-  void viewWillAppear() override;
-  void viewDidDisappear() override;
-  static constexpr KDCoordinate k_topMargin = 10;
-  static constexpr KDCoordinate k_bottomMargin = 15;
-  static constexpr KDCoordinate k_leftMargin = 1;
-  static constexpr KDCoordinate k_rightMargin = 15;
-  static constexpr KDCoordinate k_abscissaCellWidth = 100;
-  static constexpr KDCoordinate k_ordinateCellWidth = 100;
-protected:
-  StackViewController * stackController() const;
-  bool setDataAtLocation(double floatBody, int columnIndex, int rowIndex) override;
-  virtual void updateNumberOfColumns();
-  Interval * m_interval;
-  int m_numberOfColumns;
-  bool m_numberOfColumnsNeedUpdate;
-private:
-  virtual Function * functionAtColumn(int i);
-  Responder * tabController() const override;
-  SelectableTableView * selectableTableView() override { return &m_selectableTableView; }
-  void configureAbscissa();
-  void configureFunction();
-  bool cellAtLocationIsEditable(int columnIndex, int rowIndex) override;
-  double dataAtLocation(int columnIndex, int rowIndex) override;
-  int numberOfElements() override;
-  int maxNumberOfElements() const override;
-  virtual double evaluationOfAbscissaAtColumn(double abscissa, int columnIndex);
-  constexpr static int k_maxNumberOfAbscissaCells = 10;
-  virtual int maxNumberOfCells() = 0;
-  virtual int maxNumberOfFunctions() = 0;
-  SelectableTableView m_selectableTableView;
-  EvenOddMessageTextCell m_abscissaTitleCell;
-  virtual FunctionTitleCell * functionTitleCells(int j) = 0;
-  virtual EvenOddBufferTextCell * floatCells(int j) = 0;
-  char m_draftTextBuffer[TextField::maxBufferSize()];
-  EvenOddEditableTextCell m_abscissaCells[k_maxNumberOfAbscissaCells];
-  virtual FunctionStore * functionStore() const = 0;
-  virtual ValuesFunctionParameterController * functionParameterController() = 0;
-  ValuesParameterController m_abscissaParameterController;
-  Button m_setIntervalButton;
-};
-
-}
-
-#endif
-
diff --git a/apps/shared/values_function_parameter_controller.cpp b/apps/shared/values_function_parameter_controller.cpp
deleted file mode 100644
index 322155ecb..000000000
--- a/apps/shared/values_function_parameter_controller.cpp
+++ /dev/null
@@ -1,57 +0,0 @@
-#include "values_function_parameter_controller.h"
-#include <assert.h>
-
-namespace Shared {
-
-ValuesFunctionParameterController::ValuesFunctionParameterController(char symbol) :
-  ViewController(nullptr),
-  m_copyColumn(I18n::Message::CopyColumnInList),
-  m_selectableTableView(this, this, this),
-  m_function(nullptr),
-  m_symbol(symbol)
-{
-}
-
-const char * ValuesFunctionParameterController::title() {
-  strlcpy(m_pageTitle, I18n::translate(I18n::Message::FunctionColumn), k_maxNumberOfCharsInTitle);
-  char * parenthesis = const_cast<char *>(UTF8Helper::CodePointSearch(m_pageTitle, '('));
-  if (UTF8Helper::CodePointIs(parenthesis, '(') && parenthesis > m_pageTitle && parenthesis < m_pageTitle + k_maxNumberOfCharsInTitle) {
-    *(m_pageTitle - 1) = *m_function->name();
-    *(m_pageTitle + 1) = m_symbol;
-  }
-  return m_pageTitle;
-}
-
-View * ValuesFunctionParameterController::view() {
-  return &m_selectableTableView;
-}
-
-void ValuesFunctionParameterController::setFunction(Function * function) {
-  m_function = function;
-}
-
-void ValuesFunctionParameterController::didBecomeFirstResponder() {
-  m_selectableTableView.reloadData();
-  selectCellAtLocation(0, 0);
-  app()->setFirstResponder(&m_selectableTableView);
-}
-
-int ValuesFunctionParameterController::numberOfRows() {
-  return 1;
-};
-
-HighlightCell * ValuesFunctionParameterController::reusableCell(int index) {
-  assert(index == 0);
-  return &m_copyColumn;
-}
-
-int ValuesFunctionParameterController::reusableCellCount() {
-  return 1;
-}
-
-KDCoordinate ValuesFunctionParameterController::cellHeight() {
-  return Metric::ParameterCellHeight;
-}
-
-}
-
diff --git a/apps/shared/values_function_parameter_controller.h b/apps/shared/values_function_parameter_controller.h
deleted file mode 100644
index b6c303d8a..000000000
--- a/apps/shared/values_function_parameter_controller.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#ifndef SHARED_VALUES_FUNCTION_PARAM_CONTROLLER_H
-#define SHARED_VALUES_FUNCTION_PARAM_CONTROLLER_H
-
-#include <escher.h>
-#include "function.h"
-#include <apps/i18n.h>
-
-namespace Shared {
-
-class ValuesFunctionParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
-public:
-  ValuesFunctionParameterController(char symbol);
-
-  View * view() override;
-  const char * title() override;
-  void didBecomeFirstResponder() override;
-  virtual int numberOfRows() override;
-  KDCoordinate cellHeight() override;
-  virtual HighlightCell * reusableCell(int index) override;
-  virtual int reusableCellCount() override;
-  virtual void setFunction(Function * function);
-protected:
-  MessageTableCellWithChevron m_copyColumn;
-  SelectableTableView m_selectableTableView;
-private:
-  constexpr static int k_maxNumberOfCharsInTitle = 16;
-  char m_pageTitle[k_maxNumberOfCharsInTitle];
-  Function * m_function;
-  char m_symbol;
-};
-
-}
-
-#endif
-

From 57da4ea6188d6d66d4662ee83657b8e8164ec772 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 17:32:00 +0100
Subject: [PATCH 127/295] [shared] Rename classes: ExpressionModelHandle -->
 ExpressionModel SingleExpressionModelHandle --> ExpressionModelHandle
 StorageFunction --> Function StorageCartesianFunction --> CartesianFunction
 StorageFunctionApp --> FunctionApp

---
 apps/graph/app.cpp                            |   4 +-
 apps/graph/app.h                              |   8 +-
 .../graph/calculation_graph_controller.cpp    |   2 +-
 .../graph/calculation_graph_controller.h      |   2 +-
 .../graph/curve_parameter_controller.cpp      |   4 +-
 apps/graph/graph/curve_parameter_controller.h |   6 +-
 apps/graph/graph/graph_controller.cpp         |  12 +-
 apps/graph/graph/graph_controller.h           |   4 +-
 apps/graph/graph/graph_controller_helper.cpp  |   8 +-
 apps/graph/graph/graph_view.cpp               |  12 +-
 apps/graph/graph/graph_view.h                 |   2 +-
 .../graph/graph/integral_graph_controller.cpp |   4 +-
 apps/graph/graph/integral_graph_controller.h  |   2 +-
 .../graph/intersection_graph_controller.cpp   |  12 +-
 apps/graph/graph/tangent_graph_controller.cpp |   6 +-
 apps/graph/graph/tangent_graph_controller.h   |   2 +-
 apps/graph/list/storage_list_controller.cpp   |  32 ++---
 apps/graph/list/storage_list_controller.h     |   4 +-
 .../list/text_field_function_title_cell.cpp   |   2 +-
 .../list/text_field_function_title_cell.h     |   4 +-
 .../storage_cartesian_function_store.cpp      |   6 +-
 apps/graph/storage_cartesian_function_store.h |  12 +-
 ...torage_derivative_parameter_controller.cpp |   2 +-
 .../storage_derivative_parameter_controller.h |   2 +-
 .../storage_function_parameter_controller.cpp |  18 +--
 .../storage_function_parameter_controller.h   |   8 +-
 .../values/storage_values_controller.cpp      |  18 +--
 apps/graph/values/storage_values_controller.h |   4 +-
 apps/sequence/app.cpp                         |   6 +-
 apps/sequence/app.h                           |   8 +-
 .../graph/curve_parameter_controller.cpp      |   2 +-
 .../graph/curve_parameter_controller.h        |   2 +-
 .../graph/go_to_parameter_controller.cpp      |   2 +-
 .../graph/go_to_parameter_controller.h        |   4 +-
 apps/sequence/graph/graph_controller.cpp      |   8 +-
 apps/sequence/graph/graph_controller.h        |   4 +-
 apps/sequence/graph/graph_view.cpp            |   4 +-
 apps/sequence/graph/graph_view.h              |   2 +-
 apps/sequence/graph/term_sum_controller.cpp   |   2 +-
 apps/sequence/graph/term_sum_controller.h     |   2 +-
 apps/sequence/list/list_controller.cpp        |   8 +-
 apps/sequence/list/list_controller.h          |   6 +-
 apps/sequence/sequence.cpp                    |  14 +-
 apps/sequence/sequence.h                      |  12 +-
 apps/sequence/sequence_store.cpp              |   2 +-
 apps/sequence/sequence_store.h                |   6 +-
 apps/shared/Makefile                          |   8 +-
 ...an_function.cpp => cartesian_function.cpp} |  38 ++---
 ...tesian_function.h => cartesian_function.h} |  20 +--
 apps/shared/expression_model.cpp              | 131 ++++++++++++++++++
 apps/shared/expression_model.h                |  42 ++++++
 apps/shared/expression_model_handle.cpp       | 114 +--------------
 apps/shared/expression_model_handle.h         |  55 ++++----
 .../{storage_function.cpp => function.cpp}    |  22 +--
 .../shared/{storage_function.h => function.h} |  10 +-
 ...rage_function_app.cpp => function_app.cpp} |  12 +-
 ...{storage_function_app.h => function_app.h} |  10 +-
 apps/shared/global_context.cpp                |   8 +-
 .../shared/single_expression_model_handle.cpp |  27 ----
 apps/shared/single_expression_model_handle.h  |  43 ------
 ...orage_expression_model_list_controller.cpp |  12 +-
 ...storage_expression_model_list_controller.h |   2 +-
 .../shared/storage_expression_model_store.cpp |   8 +-
 apps/shared/storage_expression_model_store.h  |  14 +-
 .../storage_function_banner_delegate.cpp      |   4 +-
 .../shared/storage_function_banner_delegate.h |   4 +-
 ...ge_function_curve_parameter_controller.cpp |  12 +-
 ...rage_function_curve_parameter_controller.h |   6 +-
 ...ge_function_go_to_parameter_controller.cpp |  16 +--
 ...rage_function_go_to_parameter_controller.h |   6 +-
 .../storage_function_graph_controller.cpp     |  62 ++++-----
 .../storage_function_graph_controller.h       |  10 +-
 apps/shared/storage_function_graph_view.cpp   |  18 +--
 apps/shared/storage_function_graph_view.h     |   6 +-
 .../storage_function_list_controller.cpp      |  78 +++++------
 .../shared/storage_function_list_controller.h |   6 +-
 apps/shared/storage_function_store.cpp        |   4 +-
 apps/shared/storage_function_store.h          |  12 +-
 .../storage_list_parameter_controller.cpp     |   8 +-
 .../storage_list_parameter_controller.h       |   4 +-
 apps/shared/storage_sum_graph_controller.cpp  |  12 +-
 apps/shared/storage_sum_graph_controller.h    |   8 +-
 apps/shared/storage_values_controller.cpp     |   8 +-
 apps/shared/storage_values_controller.h       |   2 +-
 ...e_values_function_parameter_controller.cpp |   6 +-
 ...age_values_function_parameter_controller.h |   4 +-
 apps/solver/equation.cpp                      |   4 +-
 apps/solver/equation.h                        |   8 +-
 apps/solver/equation_store.cpp                |   2 +-
 apps/solver/equation_store.h                  |   2 +-
 apps/variable_box_controller.cpp              |  20 +--
 91 files changed, 602 insertions(+), 602 deletions(-)
 rename apps/shared/{storage_cartesian_function.cpp => cartesian_function.cpp} (72%)
 rename apps/shared/{storage_cartesian_function.h => cartesian_function.h} (80%)
 create mode 100644 apps/shared/expression_model.cpp
 create mode 100644 apps/shared/expression_model.h
 rename apps/shared/{storage_function.cpp => function.cpp} (73%)
 rename apps/shared/{storage_function.h => function.h} (89%)
 rename apps/shared/{storage_function_app.cpp => function_app.cpp} (73%)
 rename apps/shared/{storage_function_app.h => function_app.h} (77%)
 delete mode 100644 apps/shared/single_expression_model_handle.cpp
 delete mode 100644 apps/shared/single_expression_model_handle.h

diff --git a/apps/graph/app.cpp b/apps/graph/app.cpp
index 9b873e3a8..138383411 100644
--- a/apps/graph/app.cpp
+++ b/apps/graph/app.cpp
@@ -21,7 +21,7 @@ const Image * App::Descriptor::icon() {
 }
 
 App::Snapshot::Snapshot() :
-  Shared::StorageFunctionApp::Snapshot::Snapshot(),
+  Shared::FunctionApp::Snapshot::Snapshot(),
   m_functionStore(),
   m_graphRange(&m_cursor)
 {
@@ -50,7 +50,7 @@ void App::Snapshot::tidy() {
 }
 
 App::App(Container * container, Snapshot * snapshot) :
-  StorageFunctionApp(container, snapshot, &m_inputViewController),
+  FunctionApp(container, snapshot, &m_inputViewController),
   m_listController(&m_listFooter, &m_listHeader, &m_listFooter),
   m_listFooter(&m_listHeader, &m_listController, &m_listController, ButtonRowController::Position::Bottom, ButtonRowController::Style::EmbossedGrey),
   m_listHeader(&m_listStackViewController, &m_listFooter, &m_listController),
diff --git a/apps/graph/app.h b/apps/graph/app.h
index a38715e72..5dfeb4db7 100644
--- a/apps/graph/app.h
+++ b/apps/graph/app.h
@@ -6,11 +6,11 @@
 #include "graph/graph_controller.h"
 #include "list/storage_list_controller.h"
 #include "values/storage_values_controller.h"
-#include "../shared/storage_function_app.h"
+#include "../shared/function_app.h"
 
 namespace Graph {
 
-class App : public Shared::StorageFunctionApp {
+class App : public Shared::FunctionApp {
 public:
   class Descriptor : public ::App::Descriptor {
   public:
@@ -18,7 +18,7 @@ public:
     I18n::Message upperName() override;
     const Image * icon() override;
   };
-  class Snapshot : public Shared::StorageFunctionApp::Snapshot {
+  class Snapshot : public Shared::FunctionApp::Snapshot {
   public:
     Snapshot();
     App * unpack(Container * container) override;
@@ -33,7 +33,7 @@ public:
   InputViewController * inputViewController() override;
   char XNT() override;
   NestedMenuController * variableBoxForInputEventHandler(InputEventHandler * textInput) override;
-  StorageCartesianFunctionStore * functionStore() override { return static_cast<StorageCartesianFunctionStore *>(Shared::StorageFunctionApp::functionStore()); }
+  StorageCartesianFunctionStore * functionStore() override { return static_cast<StorageCartesianFunctionStore *>(Shared::FunctionApp::functionStore()); }
 private:
   App(Container * container, Snapshot * snapshot);
   StorageListController m_listController;
diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 7bb84d4a8..3c9ea8328 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -63,7 +63,7 @@ void CalculationGraphController::setRecord(Ion::Storage::Record record) {
 
 void CalculationGraphController::reloadBannerView() {
   m_bannerView->setNumberOfSubviews(2);
-  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunction::Symbol());
+  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), CartesianFunction::Symbol());
 }
 
 bool CalculationGraphController::moveCursor(int direction) {
diff --git a/apps/graph/graph/calculation_graph_controller.h b/apps/graph/graph/calculation_graph_controller.h
index 90e973df5..01d748f9b 100644
--- a/apps/graph/graph/calculation_graph_controller.h
+++ b/apps/graph/graph/calculation_graph_controller.h
@@ -12,7 +12,7 @@ namespace Graph {
 
 class App;
 
-class CalculationGraphController : public ViewController, public Shared::StorageFunctionBannerDelegate {
+class CalculationGraphController : public ViewController, public Shared::FunctionBannerDelegate {
 public:
   CalculationGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor, I18n::Message defaultMessage);
   View * view() override;
diff --git a/apps/graph/graph/curve_parameter_controller.cpp b/apps/graph/graph/curve_parameter_controller.cpp
index 2361724e5..154070b51 100644
--- a/apps/graph/graph/curve_parameter_controller.cpp
+++ b/apps/graph/graph/curve_parameter_controller.cpp
@@ -8,7 +8,7 @@ using namespace Shared;
 namespace Graph {
 
 CurveParameterController::CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, BannerView * bannerView, CurveViewCursor * cursor, GraphView * graphView, GraphController * graphController) :
-  StorageFunctionCurveParameterController(graphRange, cursor),
+  FunctionCurveParameterController(graphRange, cursor),
   m_goToParameterController(this, inputEventHandlerDelegate, graphRange, cursor, I18n::Message::X),
   m_graphController(graphController),
   m_calculationCell(I18n::Message::Compute),
@@ -68,7 +68,7 @@ int CurveParameterController::reusableCellCount() {
   return k_totalNumberOfCells;
 }
 
-StorageFunctionGoToParameterController * CurveParameterController::goToParameterController() {
+FunctionGoToParameterController * CurveParameterController::goToParameterController() {
   return &m_goToParameterController;
 }
 
diff --git a/apps/graph/graph/curve_parameter_controller.h b/apps/graph/graph/curve_parameter_controller.h
index 1588a2b30..06be4cb71 100644
--- a/apps/graph/graph/curve_parameter_controller.h
+++ b/apps/graph/graph/curve_parameter_controller.h
@@ -9,7 +9,7 @@ namespace Graph {
 
 class GraphController;
 
-class CurveParameterController : public Shared::StorageFunctionCurveParameterController {
+class CurveParameterController : public Shared::FunctionCurveParameterController {
 public:
   CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, Shared::InteractiveCurveViewRange * graphRange, BannerView * bannerView, Shared::CurveViewCursor * cursor, GraphView * graphView, GraphController * graphController);
   const char * title() override;
@@ -19,8 +19,8 @@ public:
   int reusableCellCount() override;
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
 private:
-  Shared::StorageFunctionGoToParameterController * goToParameterController() override;
-  Shared::StorageFunctionGoToParameterController m_goToParameterController;
+  Shared::FunctionGoToParameterController * goToParameterController() override;
+  Shared::FunctionGoToParameterController m_goToParameterController;
   GraphController * m_graphController;
   constexpr static int k_totalNumberOfCells = 3;
   MessageTableCellWithChevron m_calculationCell;
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index 5c680b50f..2431d5222 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -8,7 +8,7 @@ namespace Graph {
 static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
-  StorageFunctionGraphController(parentResponder, inputEventHandlerDelegate, header, curveViewRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
+  FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, curveViewRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
   m_bannerView(),
   m_view(functionStore, curveViewRange, m_cursor, &m_bannerView, &m_cursorView),
   m_graphRange(curveViewRange),
@@ -27,7 +27,7 @@ I18n::Message GraphController::emptyMessage() {
 
 void GraphController::viewWillAppear() {
   m_view.drawTangent(false);
-  StorageFunctionGraphController::viewWillAppear();
+  FunctionGraphController::viewWillAppear();
   selectFunctionWithCursor(indexFunctionSelectedByCursor()); // update the color of the cursor
 }
 
@@ -43,7 +43,7 @@ float GraphController::interestingXHalfRange() const {
   float characteristicRange = 0.0f;
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   for (int i = 0; i < functionStore()->numberOfActiveFunctions(); i++) {
-    ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     float fRange = f->expressionReduced(myApp->localContext()).characteristicXRange(*(myApp->localContext()), Poincare::Preferences::sharedPreferences()->angleUnit());
     if (!std::isnan(fRange)) {
       characteristicRange = maxFloat(fRange, characteristicRange);
@@ -57,8 +57,8 @@ int GraphController::estimatedBannerNumberOfLines() const {
 }
 
 void GraphController::selectFunctionWithCursor(int functionIndex) {
-  StorageFunctionGraphController::selectFunctionWithCursor(functionIndex);
-  ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
+  FunctionGraphController::selectFunctionWithCursor(functionIndex);
+  ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
   m_cursorView.setColor(f->color());
 }
 
@@ -67,7 +67,7 @@ BannerView * GraphController::bannerView() {
 }
 
 void GraphController::reloadBannerView() {
-  StorageFunctionGraphController::reloadBannerView();
+  FunctionGraphController::reloadBannerView();
   m_bannerView.setNumberOfSubviews(2+m_displayDerivativeInBanner);
   if (functionStore()->numberOfActiveFunctions() == 0 || !m_displayDerivativeInBanner) {
     return;
diff --git a/apps/graph/graph/graph_controller.h b/apps/graph/graph/graph_controller.h
index 58586d727..e7206a470 100644
--- a/apps/graph/graph/graph_controller.h
+++ b/apps/graph/graph/graph_controller.h
@@ -13,7 +13,7 @@
 
 namespace Graph {
 
-class GraphController : public Shared::StorageFunctionGraphController, public GraphControllerHelper {
+class GraphController : public Shared::FunctionGraphController, public GraphControllerHelper {
 public:
   GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
@@ -33,7 +33,7 @@ private:
     return &m_cursorView;
   }
   CurveParameterController * curveParameterController() override;
-  StorageCartesianFunctionStore * functionStore() const override { return static_cast<StorageCartesianFunctionStore *>(Shared::StorageFunctionGraphController::functionStore()); }
+  StorageCartesianFunctionStore * functionStore() const override { return static_cast<StorageCartesianFunctionStore *>(Shared::FunctionGraphController::functionStore()); }
   Shared::RoundCursorView m_cursorView;
   BannerView m_bannerView;
   GraphView m_view;
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index 7f59b3cf3..b4cdd4465 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -10,7 +10,7 @@ using namespace Poincare;
 namespace Graph {
 
 bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio) {
-  ExpiringPointer<StorageCartesianFunction> function = app->functionStore()->modelForRecord(record);
+  ExpiringPointer<CartesianFunction> function = app->functionStore()->modelForRecord(record);
   double xCursorPosition = cursor->x();
   double x = direction > 0 ? xCursorPosition + range->xGridUnit()/numberOfStepsInGradUnit : xCursorPosition -  range->xGridUnit()/numberOfStepsInGradUnit;
   double y = function->evaluateAtAbscissa(x, app->localContext());
@@ -20,11 +20,11 @@ bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCurso
 }
 
 void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, Ion::Storage::Record record, App * app) {
-  ExpiringPointer<StorageCartesianFunction> function = app->functionStore()->modelForRecord(record);
-  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  ExpiringPointer<CartesianFunction> function = app->functionStore()->modelForRecord(record);
+  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
-  int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize, StorageCartesianFunction::Symbol());
+  int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize, CartesianFunction::Symbol());
   const char * legend = "=";
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   double y = function->approximateDerivative(cursor->x(), app->localContext());
diff --git a/apps/graph/graph/graph_view.cpp b/apps/graph/graph/graph_view.cpp
index be44101ab..96f084c2c 100644
--- a/apps/graph/graph/graph_view.cpp
+++ b/apps/graph/graph/graph_view.cpp
@@ -7,7 +7,7 @@ namespace Graph {
 
 GraphView::GraphView(StorageCartesianFunctionStore * functionStore, InteractiveCurveViewRange * graphRange,
   CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
-  StorageFunctionGraphView(graphRange, cursor, bannerView, cursorView),
+  FunctionGraphView(graphRange, cursor, bannerView, cursorView),
   m_functionStore(functionStore),
   m_tangent(false)
 {
@@ -18,25 +18,25 @@ void GraphView::reload() {
     KDRect dirtyZone(KDRect(0, 0, bounds().width(), bounds().height()-m_bannerView->bounds().height()));
     markRectAsDirty(dirtyZone);
   }
-  return StorageFunctionGraphView::reload();
+  return FunctionGraphView::reload();
 }
 
 void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
-  StorageFunctionGraphView::drawRect(ctx, rect);
+  FunctionGraphView::drawRect(ctx, rect);
   for (int i = 0; i < m_functionStore->numberOfActiveFunctions(); i++) {
     Ion::Storage::Record record = m_functionStore->activeRecordAtIndex(i);
-    ExpiringPointer<StorageCartesianFunction> f = m_functionStore->modelForRecord(record);;
+    ExpiringPointer<CartesianFunction> f = m_functionStore->modelForRecord(record);;
 
     /* Draw function (color the area under curve of the selected function) */
     if (record == m_selectedRecord) {
       drawCurve(ctx, rect, [](float t, void * model, void * context) {
-        StorageCartesianFunction * f = (StorageCartesianFunction *)model;
+        CartesianFunction * f = (CartesianFunction *)model;
         Poincare::Context * c = (Poincare::Context *)context;
         return f->evaluateAtAbscissa(t, c);
       }, f.operator->(), context(), f->color(), true, m_highlightedStart, m_highlightedEnd);
     } else {
       drawCurve(ctx, rect, [](float t, void * model, void * context) {
-        StorageCartesianFunction * f = (StorageCartesianFunction *)model;
+        CartesianFunction * f = (CartesianFunction *)model;
         Poincare::Context * c = (Poincare::Context *)context;
         return f->evaluateAtAbscissa(t, c);
       }, f.operator->(), context(), f->color());
diff --git a/apps/graph/graph/graph_view.h b/apps/graph/graph/graph_view.h
index e43bc9143..965da1fa0 100644
--- a/apps/graph/graph/graph_view.h
+++ b/apps/graph/graph/graph_view.h
@@ -6,7 +6,7 @@
 
 namespace Graph {
 
-class GraphView : public Shared::StorageFunctionGraphView {
+class GraphView : public Shared::FunctionGraphView {
 public:
 
   GraphView(StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * graphRange,
diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index c8e948f72..041807c0b 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -36,11 +36,11 @@ double IntegralGraphController::cursorNextStep(double x, int direction) {
   return (direction > 0 ? x + m_graphRange->xGridUnit()/k_numberOfCursorStepsInGradUnit : x - m_graphRange->xGridUnit()/k_numberOfCursorStepsInGradUnit);
 }
 
-Layout IntegralGraphController::createFunctionLayout(ExpiringPointer<StorageFunction> function) {
+Layout IntegralGraphController::createFunctionLayout(ExpiringPointer<Shared::Function> function) {
   constexpr size_t bufferSize = SymbolAbstract::k_maxNameSize+5; // f(x)dx
   char buffer[bufferSize];
   const char * dx = "dx";
-  int numberOfChars = function->nameWithArgument(buffer, bufferSize-strlen(dx), StorageCartesianFunction::Symbol());
+  int numberOfChars = function->nameWithArgument(buffer, bufferSize-strlen(dx), CartesianFunction::Symbol());
   strlcpy(buffer+numberOfChars, dx, bufferSize-numberOfChars);
   return LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
 }
diff --git a/apps/graph/graph/integral_graph_controller.h b/apps/graph/graph/integral_graph_controller.h
index cc0d6f663..29af61b60 100644
--- a/apps/graph/graph/integral_graph_controller.h
+++ b/apps/graph/graph/integral_graph_controller.h
@@ -14,7 +14,7 @@ public:
 private:
   I18n::Message legendMessageAtStep(Step step) override;
   double cursorNextStep(double position, int direction) override;
-  Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) override;
+  Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) override;
 };
 
 }
diff --git a/apps/graph/graph/intersection_graph_controller.cpp b/apps/graph/graph/intersection_graph_controller.cpp
index 0d45ff805..bb28f6076 100644
--- a/apps/graph/graph/intersection_graph_controller.cpp
+++ b/apps/graph/graph/intersection_graph_controller.cpp
@@ -18,18 +18,18 @@ const char * IntersectionGraphController::title() {
 
 void IntersectionGraphController::reloadBannerView() {
   m_bannerView->setNumberOfSubviews(2);
-  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), StorageCartesianFunction::Symbol());
-  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), CartesianFunction::Symbol());
+  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
   const char * legend = "=";
   // 'f(x)=g(x)=', keep 2 chars for '='
-  ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(m_record);
-  int numberOfChar = f->nameWithArgument(buffer, bufferSize-2, StorageCartesianFunction::Symbol());
+  ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(m_record);
+  int numberOfChar = f->nameWithArgument(buffer, bufferSize-2, CartesianFunction::Symbol());
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   // keep 1 char for '=';
-  ExpiringPointer<StorageCartesianFunction> g = functionStore()->modelForRecord(m_intersectedRecord);
-  numberOfChar += g->nameWithArgument(buffer+numberOfChar, bufferSize-numberOfChar-1, StorageCartesianFunction::Symbol());
+  ExpiringPointer<CartesianFunction> g = functionStore()->modelForRecord(m_intersectedRecord);
+  numberOfChar += g->nameWithArgument(buffer+numberOfChar, bufferSize-numberOfChar-1, CartesianFunction::Symbol());
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(m_cursor->y(), buffer+numberOfChar, bufferSize-numberOfChar, Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index 197a69938..7032cc726 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -40,13 +40,13 @@ void TangentGraphController::reloadBannerView() {
     return;
   }
   App * myApp = static_cast<App *>(app());
-  StorageFunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_record, myApp->functionStore(), StorageCartesianFunction::Symbol());
+  FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_record, myApp->functionStore(), CartesianFunction::Symbol());
   GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(m_cursor, m_record, myApp);
-  constexpr size_t bufferSize = StorageFunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
+  constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * legend = "a=";
   int legendLength = strlcpy(buffer, legend, bufferSize);
-  ExpiringPointer<StorageCartesianFunction> function = myApp->functionStore()->modelForRecord(m_record);
+  ExpiringPointer<CartesianFunction> function = myApp->functionStore()->modelForRecord(m_record);
   double y = function->approximateDerivative(m_cursor->x(), myApp->localContext());
   PoincareHelpers::ConvertFloatToText<double>(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
   m_bannerView->setLegendAtIndex(buffer, 4);
diff --git a/apps/graph/graph/tangent_graph_controller.h b/apps/graph/graph/tangent_graph_controller.h
index 9c62f94bc..aedf9f259 100644
--- a/apps/graph/graph/tangent_graph_controller.h
+++ b/apps/graph/graph/tangent_graph_controller.h
@@ -10,7 +10,7 @@
 
 namespace Graph {
 
-class TangentGraphController : public Shared::SimpleInteractiveCurveViewController, public Shared::StorageFunctionBannerDelegate, public GraphControllerHelper {
+class TangentGraphController : public Shared::SimpleInteractiveCurveViewController, public Shared::FunctionBannerDelegate, public GraphControllerHelper {
 public:
   TangentGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
diff --git a/apps/graph/list/storage_list_controller.cpp b/apps/graph/list/storage_list_controller.cpp
index 6beb1cd82..9734af536 100644
--- a/apps/graph/list/storage_list_controller.cpp
+++ b/apps/graph/list/storage_list_controller.cpp
@@ -10,7 +10,7 @@ using namespace Shared;
 namespace Graph {
 
 StorageListController::StorageListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer) :
-  Shared::StorageFunctionListController(parentResponder, header, footer, I18n::Message::AddFunction),
+  Shared::FunctionListController(parentResponder, header, footer, I18n::Message::AddFunction),
   m_functionTitleCells{ //TODO find better initialization
     TextFieldFunctionTitleCell(this),
     TextFieldFunctionTitleCell(this),
@@ -49,14 +49,14 @@ bool StorageListController::textFieldDidFinishEditing(TextField * textField, con
   assert(textField != nullptr);
   // Compute the new name
   size_t textLength = strlen(text);
-  size_t argumentLength = StorageFunction::k_parenthesedArgumentLength;
-  constexpr int maxBaseNameSize = StorageFunction::k_maxNameWithArgumentSize;
+  size_t argumentLength = Function::k_parenthesedArgumentLength;
+  constexpr int maxBaseNameSize = Function::k_maxNameWithArgumentSize;
   char baseName[maxBaseNameSize];
   if (textLength <= argumentLength) {
     // The user entered an empty name. Use a default function name.
-    StorageCartesianFunction::DefaultName(baseName, maxBaseNameSize);
+    CartesianFunction::DefaultName(baseName, maxBaseNameSize);
     size_t defaultNameLength = strlen(baseName);
-    strlcpy(baseName + defaultNameLength, StorageFunction::k_parenthesedArgument, maxBaseNameSize - defaultNameLength);
+    strlcpy(baseName + defaultNameLength, Function::k_parenthesedArgument, maxBaseNameSize - defaultNameLength);
     textField->setText(baseName);
     baseName[defaultNameLength] = 0;
   } else {
@@ -67,8 +67,8 @@ bool StorageListController::textFieldDidFinishEditing(TextField * textField, con
   GlobalContext::DestroyRecordsBaseNamedWithoutExtension(baseName, Ion::Storage::funcExtension);
 
   // Set the name
-  StorageFunction::NameNotCompliantError nameError = StorageFunction::NameNotCompliantError::None;
-  Ion::Storage::Record::ErrorStatus error = StorageFunction::BaseNameCompliant(baseName, &nameError) ? modelStore()->recordAtIndex(m_selectableTableView.selectedRow()).setBaseNameWithExtension(baseName, Ion::Storage::funcExtension) : Ion::Storage::Record::ErrorStatus::NonCompliantName;
+  Function::NameNotCompliantError nameError = Function::NameNotCompliantError::None;
+  Ion::Storage::Record::ErrorStatus error = Function::BaseNameCompliant(baseName, &nameError) ? modelStore()->recordAtIndex(m_selectableTableView.selectedRow()).setBaseNameWithExtension(baseName, Ion::Storage::funcExtension) : Ion::Storage::Record::ErrorStatus::NonCompliantName;
 
   // Handle any error
   if (error == Ion::Storage::Record::ErrorStatus::None) {
@@ -96,13 +96,13 @@ bool StorageListController::textFieldDidFinishEditing(TextField * textField, con
   } else if (error == Ion::Storage::Record::ErrorStatus::NameTaken) {
     app()->displayWarning(I18n::Message::NameTaken);
   } else if (error == Ion::Storage::Record::ErrorStatus::NonCompliantName) {
-    assert(nameError != StorageFunction::NameNotCompliantError::None);
-    if (nameError == StorageFunction::NameNotCompliantError::CharacterNotAllowed) {
+    assert(nameError != Function::NameNotCompliantError::None);
+    if (nameError == Function::NameNotCompliantError::CharacterNotAllowed) {
       app()->displayWarning(I18n::Message::AllowedCharactersAZaz09);
-    } else if (nameError == StorageFunction::NameNotCompliantError::NameCannotStartWithNumber) {
+    } else if (nameError == Function::NameNotCompliantError::NameCannotStartWithNumber) {
       app()->displayWarning(I18n::Message::NameCannotStartWithNumber);
     } else {
-      assert(nameError == StorageFunction::NameNotCompliantError::ReservedName);
+      assert(nameError == Function::NameNotCompliantError::ReservedName);
       app()->displayWarning(I18n::Message::ReservedName);
     }
   } else {
@@ -118,7 +118,7 @@ bool StorageListController::textFieldDidAbortEditing(TextField * textField) {
   // Put the name column back to normal size
   computeTitlesColumnWidth();
   selectableTableView()->reloadData();
-  ExpiringPointer<StorageFunction> function = modelStore()->modelForRecord(modelStore()->recordAtIndex(selectedRow()));
+  ExpiringPointer<Function> function = modelStore()->modelForRecord(modelStore()->recordAtIndex(selectedRow()));
   setFunctionNameInTextField(function, textField);
   m_selectableTableView.selectedCell()->setHighlighted(true);
   app()->setFirstResponder(&m_selectableTableView);
@@ -165,7 +165,7 @@ void StorageListController::willDisplayTitleCellAtIndex(HighlightCell * cell, in
   titleCell->setBaseline(baseline(j));
   if (!titleCell->isEditing()) {
     // Set name and color if the name is not being edited
-    ExpiringPointer<StorageFunction> function = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+    ExpiringPointer<Function> function = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
     setFunctionNameInTextField(function, titleCell->textField());
     KDColor functionNameColor = function->isActive() ? function->color() : Palette::GreyDark;
     titleCell->setColor(functionNameColor);
@@ -175,14 +175,14 @@ void StorageListController::willDisplayTitleCellAtIndex(HighlightCell * cell, in
 void StorageListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   assert(cell != nullptr);
   assert(j >= 0 && j < modelStore()->numberOfModels());
-  Shared::StorageFunctionListController::willDisplayExpressionCellAtIndex(cell, j);
+  Shared::FunctionListController::willDisplayExpressionCellAtIndex(cell, j);
   FunctionExpressionCell * myCell = (FunctionExpressionCell *)cell;
-  ExpiringPointer<StorageFunction> f = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<Function> f = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   KDColor textColor = f->isActive() ? KDColorBlack : Palette::GreyDark;
   myCell->setTextColor(textColor);
 }
 
-void StorageListController::setFunctionNameInTextField(ExpiringPointer<StorageFunction> function, TextField * textField) {
+void StorageListController::setFunctionNameInTextField(ExpiringPointer<Function> function, TextField * textField) {
   assert(textField != nullptr);
   char bufferName[BufferTextView::k_maxNumberOfChar];
   function->nameWithArgument(bufferName, BufferTextView::k_maxNumberOfChar, modelStore()->symbol());
diff --git a/apps/graph/list/storage_list_controller.h b/apps/graph/list/storage_list_controller.h
index eabe0c52f..85c35bbb3 100644
--- a/apps/graph/list/storage_list_controller.h
+++ b/apps/graph/list/storage_list_controller.h
@@ -11,7 +11,7 @@
 
 namespace Graph {
 
-class StorageListController : public Shared::StorageFunctionListController, public Shared::TextFieldDelegate {
+class StorageListController : public Shared::FunctionListController, public Shared::TextFieldDelegate {
 public:
   StorageListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer);
   const char * title() override;
@@ -32,7 +32,7 @@ private:
   Shared::TextFieldDelegateApp * textFieldDelegateApp() override {
     return static_cast<Shared::TextFieldDelegateApp *>(app());
   }
-  void setFunctionNameInTextField(Shared::ExpiringPointer<Shared::StorageFunction> function, TextField * textField);
+  void setFunctionNameInTextField(Shared::ExpiringPointer<Shared::Function> function, TextField * textField);
   TextFieldFunctionTitleCell m_functionTitleCells[k_maxNumberOfDisplayableRows];
   Shared::FunctionExpressionCell m_expressionCells[k_maxNumberOfDisplayableRows];
   ListParameterController m_parameterController;
diff --git a/apps/graph/list/text_field_function_title_cell.cpp b/apps/graph/list/text_field_function_title_cell.cpp
index 12c2df521..e3301b258 100644
--- a/apps/graph/list/text_field_function_title_cell.cpp
+++ b/apps/graph/list/text_field_function_title_cell.cpp
@@ -10,7 +10,7 @@ static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 TextFieldFunctionTitleCell::TextFieldFunctionTitleCell(StorageListController * listController, Orientation orientation, const KDFont * font) :
   Shared::FunctionTitleCell(orientation),
   Responder(listController),
-  m_textField(Shared::StorageFunction::k_parenthesedArgumentLength, this, m_textFieldBuffer, m_textFieldBuffer, k_textFieldBufferSize, nullptr, listController, false, font, 1.0f, 0.5f)
+  m_textField(Shared::Function::k_parenthesedArgumentLength, this, m_textFieldBuffer, m_textFieldBuffer, k_textFieldBufferSize, nullptr, listController, false, font, 1.0f, 0.5f)
 {
 }
 
diff --git a/apps/graph/list/text_field_function_title_cell.h b/apps/graph/list/text_field_function_title_cell.h
index 3a8771ba2..421a96d6c 100644
--- a/apps/graph/list/text_field_function_title_cell.h
+++ b/apps/graph/list/text_field_function_title_cell.h
@@ -2,7 +2,7 @@
 #define GRAPH_LIST_TEXT_FIELD_FUNCTION_TITLE_CELL_H
 
 #include <apps/shared/function_title_cell.h>
-#include <apps/shared/storage_function.h>
+#include <apps/shared/function.h>
 #include <apps/shared/text_field_with_extension.h>
 
 namespace Graph {
@@ -41,7 +41,7 @@ public:
   void didBecomeFirstResponder() override;
 private:
   constexpr static KDCoordinate k_textFieldRightMargin = 4;
-  constexpr static int k_textFieldBufferSize = Shared::StorageFunction::k_maxNameWithArgumentSize;
+  constexpr static int k_textFieldBufferSize = Shared::Function::k_maxNameWithArgumentSize;
   float verticalAlignmentGivenExpressionBaselineAndRowHeight(KDCoordinate expressionBaseline, KDCoordinate rowHeight) const override;
   Shared::TextFieldWithExtension m_textField;
   char m_textFieldBuffer[k_textFieldBufferSize];
diff --git a/apps/graph/storage_cartesian_function_store.cpp b/apps/graph/storage_cartesian_function_store.cpp
index 57a0721bd..ac73f7ae5 100644
--- a/apps/graph/storage_cartesian_function_store.cpp
+++ b/apps/graph/storage_cartesian_function_store.cpp
@@ -11,16 +11,16 @@ namespace Graph {
 
 Ion::Storage::Record::ErrorStatus StorageCartesianFunctionStore::addEmptyModel() {
   Ion::Storage::Record::ErrorStatus error;
-  StorageCartesianFunction newModel = StorageCartesianFunction::NewModel(&error);
+  CartesianFunction newModel = CartesianFunction::NewModel(&error);
   return error;
 }
 
 void StorageCartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
-  m_functions[cacheIndex] = StorageCartesianFunction(record);
+  m_functions[cacheIndex] = CartesianFunction(record);
 }
 
-SingleExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
+ExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_functions[cacheIndex];
 }
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/storage_cartesian_function_store.h
index 0f21a9cf1..7a4c02151 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/storage_cartesian_function_store.h
@@ -1,24 +1,24 @@
 #ifndef GRAPH_STORAGE_CARTESIAN_FUNCTION_STORE_H
 #define GRAPH_STORAGE_CARTESIAN_FUNCTION_STORE_H
 
-#include "../shared/storage_cartesian_function.h"
+#include "../shared/cartesian_function.h"
 #include "../shared/storage_function_store.h"
 #include <stdint.h>
 #include <escher.h>
 
 namespace Graph {
 
-class StorageCartesianFunctionStore : public Shared::StorageFunctionStore {
+class StorageCartesianFunctionStore : public Shared::FunctionStore {
 public:
-  Shared::ExpiringPointer<Shared::StorageCartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::StorageCartesianFunction>(static_cast<Shared::StorageCartesianFunction *>(privateModelForRecord(record))); }
-  char symbol() const override { return Shared::StorageCartesianFunction::Symbol(); }
+  Shared::ExpiringPointer<Shared::CartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::CartesianFunction>(static_cast<Shared::CartesianFunction *>(privateModelForRecord(record))); }
+  char symbol() const override { return Shared::CartesianFunction::Symbol(); }
   char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownX; }
 private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Ion::Storage::funcExtension; }
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
-  mutable Shared::StorageCartesianFunction m_functions[k_maxNumberOfMemoizedModels];
+  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  mutable Shared::CartesianFunction m_functions[k_maxNumberOfMemoizedModels];
 };
 
 }
diff --git a/apps/graph/values/storage_derivative_parameter_controller.cpp b/apps/graph/values/storage_derivative_parameter_controller.cpp
index 51be4d2fc..91bef595a 100644
--- a/apps/graph/values/storage_derivative_parameter_controller.cpp
+++ b/apps/graph/values/storage_derivative_parameter_controller.cpp
@@ -18,7 +18,7 @@ StorageDerivativeParameterController::StorageDerivativeParameterController(Stora
 }
 
 void StorageDerivativeParameterController::viewWillAppear() {
-  functionStore()->modelForRecord(m_record)->derivativeNameWithArgument(m_pageTitle, k_maxNumberOfCharsInTitle, Shared::StorageCartesianFunction::Symbol());
+  functionStore()->modelForRecord(m_record)->derivativeNameWithArgument(m_pageTitle, k_maxNumberOfCharsInTitle, Shared::CartesianFunction::Symbol());
 }
 
 const char * StorageDerivativeParameterController::title() {
diff --git a/apps/graph/values/storage_derivative_parameter_controller.h b/apps/graph/values/storage_derivative_parameter_controller.h
index 30675d06a..5680aff98 100644
--- a/apps/graph/values/storage_derivative_parameter_controller.h
+++ b/apps/graph/values/storage_derivative_parameter_controller.h
@@ -31,7 +31,7 @@ private:
 #else
   constexpr static int k_totalNumberOfCell = 1;
 #endif
-  constexpr static int k_maxNumberOfCharsInTitle = Shared::StorageFunction::k_maxNameWithArgumentSize + 1; // +1 for the ' of the derivative
+  constexpr static int k_maxNumberOfCharsInTitle = Shared::Function::k_maxNameWithArgumentSize + 1; // +1 for the ' of the derivative
   char m_pageTitle[k_maxNumberOfCharsInTitle];
   MessageTableCell m_hideColumn;
 #if COPY_COLUMN
diff --git a/apps/graph/values/storage_function_parameter_controller.cpp b/apps/graph/values/storage_function_parameter_controller.cpp
index 915344785..a9371be7c 100644
--- a/apps/graph/values/storage_function_parameter_controller.cpp
+++ b/apps/graph/values/storage_function_parameter_controller.cpp
@@ -7,14 +7,14 @@ using namespace Shared;
 
 namespace Graph {
 
-StorageFunctionParameterController::StorageFunctionParameterController(StorageValuesController * valuesController) :
-  StorageValuesFunctionParameterController(StorageCartesianFunction::Symbol()),
+FunctionParameterController::FunctionParameterController(StorageValuesController * valuesController) :
+  StorageValuesFunctionParameterController(CartesianFunction::Symbol()),
   m_displayDerivativeColumn(I18n::Message::DerivativeFunctionColumn),
   m_valuesController(valuesController)
 {
 }
 
-bool StorageFunctionParameterController::handleEvent(Ion::Events::Event event) {
+bool FunctionParameterController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     switch (selectedRow()) {
       case 0:
@@ -38,11 +38,11 @@ bool StorageFunctionParameterController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-int StorageFunctionParameterController::numberOfRows() {
+int FunctionParameterController::numberOfRows() {
   return k_totalNumberOfCell;
 };
 
-HighlightCell * StorageFunctionParameterController::reusableCell(int index) {
+HighlightCell * FunctionParameterController::reusableCell(int index) {
   assert(index >= 0);
   assert(index < k_totalNumberOfCell);
 #if COPY_COLUMN
@@ -53,23 +53,23 @@ HighlightCell * StorageFunctionParameterController::reusableCell(int index) {
   return cells[index];
 }
 
-int StorageFunctionParameterController::reusableCellCount() {
+int FunctionParameterController::reusableCellCount() {
   return k_totalNumberOfCell;
 }
 
-void StorageFunctionParameterController::viewWillAppear() {
+void FunctionParameterController::viewWillAppear() {
   StorageValuesFunctionParameterController::viewWillAppear();
   m_selectedFunctionColumn = m_valuesController->selectedColumn();
 }
 
-void StorageFunctionParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
+void FunctionParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
   if (cell == &m_displayDerivativeColumn) {
     SwitchView * switchView = (SwitchView *)m_displayDerivativeColumn.accessoryView();
     switchView->setState(function()->displayDerivative());
   }
 }
 
-ExpiringPointer<StorageCartesianFunction> StorageFunctionParameterController::function() {
+ExpiringPointer<CartesianFunction> FunctionParameterController::function() {
   App * a = static_cast<App *>(app());
   return a->functionStore()->modelForRecord(m_record);
 }
diff --git a/apps/graph/values/storage_function_parameter_controller.h b/apps/graph/values/storage_function_parameter_controller.h
index c629c73b6..5e652566f 100644
--- a/apps/graph/values/storage_function_parameter_controller.h
+++ b/apps/graph/values/storage_function_parameter_controller.h
@@ -2,16 +2,16 @@
 #define GRAPH_STORAGE_FUNCTION_PARAM_CONTROLLER_H
 
 #include "../../shared/expiring_pointer.h"
-#include "../../shared/storage_cartesian_function.h"
+#include "../../shared/cartesian_function.h"
 #include "../../shared/storage_values_function_parameter_controller.h"
 
 namespace Graph {
 
 class StorageValuesController;
 
-class StorageFunctionParameterController : public Shared::StorageValuesFunctionParameterController {
+class FunctionParameterController : public Shared::StorageValuesFunctionParameterController {
 public:
-  StorageFunctionParameterController(StorageValuesController * valuesController);
+  FunctionParameterController(StorageValuesController * valuesController);
   bool handleEvent(Ion::Events::Event event) override;
   int numberOfRows() override;
   HighlightCell * reusableCell(int index) override;
@@ -19,7 +19,7 @@ public:
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
   void viewWillAppear() override;
 private:
-  Shared::ExpiringPointer<Shared::StorageCartesianFunction> function();
+  Shared::ExpiringPointer<Shared::CartesianFunction> function();
 #if COPY_COLUMN
   constexpr static int k_totalNumberOfCell = 2;
 #else
diff --git a/apps/graph/values/storage_values_controller.cpp b/apps/graph/values/storage_values_controller.cpp
index 764c990e8..c2ca320e7 100644
--- a/apps/graph/values/storage_values_controller.cpp
+++ b/apps/graph/values/storage_values_controller.cpp
@@ -41,16 +41,16 @@ void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, in
   // The cell is a function title cell:
   if (j == 0 && i > 0) {
     Shared::BufferFunctionTitleCell * myFunctionCell = (Shared::BufferFunctionTitleCell *)cell;
-    const size_t bufferNameSize = Shared::StorageFunction::k_maxNameWithArgumentSize + 1;
+    const size_t bufferNameSize = Shared::Function::k_maxNameWithArgumentSize + 1;
     char bufferName[bufferNameSize];
     bool isDerivative = isDerivativeColumn(i);
     /* isDerivativeColumn uses expiring pointers, so "function" must be created
      * after the isDerivativeColumn call, else it will expire. */
-    Shared::ExpiringPointer<StorageCartesianFunction> function = functionStore()->modelForRecord(recordAtColumn(i));
+    Shared::ExpiringPointer<CartesianFunction> function = functionStore()->modelForRecord(recordAtColumn(i));
     if (isDerivative) {
-      function->derivativeNameWithArgument(bufferName, bufferNameSize, StorageCartesianFunction::Symbol());
+      function->derivativeNameWithArgument(bufferName, bufferNameSize, CartesianFunction::Symbol());
     } else {
-      function->nameWithArgument(bufferName, bufferNameSize, StorageCartesianFunction::Symbol());
+      function->nameWithArgument(bufferName, bufferNameSize, CartesianFunction::Symbol());
     }
     myFunctionCell->setText(bufferName);
     myFunctionCell->setColor(function->color());
@@ -73,7 +73,7 @@ Ion::Storage::Record StorageValuesController::recordAtColumn(int i) {
   int index = 1;
   for (int k = 0; k < functionStore()->numberOfDefinedModels(); k++) {
     Ion::Storage::Record record = functionStore()->definedRecordAtIndex(k);
-    ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(record);
+    ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(record);
     if (f->isActive()) {
       if (i == index) {
         return record;
@@ -95,7 +95,7 @@ bool StorageValuesController::isDerivativeColumn(int i) {
   assert(i >= 1);
   int index = 1;
   for (int k = 0; k < functionStore()->numberOfDefinedModels(); k++) {
-    ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(functionStore()->definedRecordAtIndex(k));
+    ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->definedRecordAtIndex(k));
     if (f->isActive()) {
       if (i == index) {
         return false;
@@ -137,7 +137,7 @@ EvenOddBufferTextCell * StorageValuesController::floatCells(int j) {
   return &m_floatCells[j];
 }
 
-StorageFunctionParameterController * StorageValuesController::functionParameterController() {
+FunctionParameterController * StorageValuesController::functionParameterController() {
   return &m_functionParameterController;
 }
 
@@ -146,7 +146,7 @@ double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, in
   bool isDerivative = isDerivativeColumn(columnIndex);
   /* isDerivativeColumn uses expiring pointers, so "function" must be created
    * after the isDerivativeColumn call, else it will expire. */
-  Shared::ExpiringPointer<StorageCartesianFunction> function = functionStore()->modelForRecord(recordAtColumn(columnIndex));
+  Shared::ExpiringPointer<CartesianFunction> function = functionStore()->modelForRecord(recordAtColumn(columnIndex));
   if (isDerivative) {
     return function->approximateDerivative(abscissa, myApp->localContext());
   }
@@ -156,7 +156,7 @@ double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, in
 void StorageValuesController::updateNumberOfColumns() {
   int result = 1;
   for (int i = 0; i < functionStore()->numberOfActiveFunctions(); i++) {
-    ExpiringPointer<StorageCartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     if (f->isActive()) {
       result += 1 + f->displayDerivative();
     }
diff --git a/apps/graph/values/storage_values_controller.h b/apps/graph/values/storage_values_controller.h
index e97a53fe7..3233e70d0 100644
--- a/apps/graph/values/storage_values_controller.h
+++ b/apps/graph/values/storage_values_controller.h
@@ -30,11 +30,11 @@ private:
   StorageCartesianFunctionStore * functionStore() const override { return static_cast<StorageCartesianFunctionStore *>(Shared::StorageValuesController::functionStore()); }
   Shared::BufferFunctionTitleCell * functionTitleCells(int j) override;
   EvenOddBufferTextCell * floatCells(int j) override;
-  StorageFunctionParameterController * functionParameterController() override;
+  FunctionParameterController * functionParameterController() override;
 
   Shared::BufferFunctionTitleCell m_functionTitleCells[k_maxNumberOfFunctions];
   EvenOddBufferTextCell m_floatCells[k_maxNumberOfCells];
-  StorageFunctionParameterController m_functionParameterController;
+  FunctionParameterController m_functionParameterController;
   Shared::IntervalParameterController m_intervalParameterController;
   StorageDerivativeParameterController m_derivativeParameterController;
 };
diff --git a/apps/sequence/app.cpp b/apps/sequence/app.cpp
index 93fea6e6e..f2e1f42c2 100644
--- a/apps/sequence/app.cpp
+++ b/apps/sequence/app.cpp
@@ -19,7 +19,7 @@ const Image * App::Descriptor::icon() {
 }
 
 App::Snapshot::Snapshot() :
-  Shared::StorageFunctionApp::Snapshot::Snapshot(),
+  Shared::FunctionApp::Snapshot::Snapshot(),
   m_sequenceStore(),
   m_graphRange(&m_cursor)
 {
@@ -30,7 +30,7 @@ App * App::Snapshot::unpack(Container * container) {
 }
 
 void App::Snapshot::reset() {
-  StorageFunctionApp::Snapshot::reset();
+  FunctionApp::Snapshot::reset();
   /* reset might be called when activating the exam mode from the settings or
    * when a memory exception occurs. In both cases, we do not want to
    * computeYAuto in GraphRange::setDefault, so we need to set its delegate to
@@ -54,7 +54,7 @@ void App::Snapshot::tidy() {
 }
 
 App::App(Container * container, Snapshot * snapshot) :
-  StorageFunctionApp(container, snapshot, &m_inputViewController),
+  FunctionApp(container, snapshot, &m_inputViewController),
   m_sequenceContext(((AppsContainer *)container)->globalContext(), snapshot->functionStore()),
   m_listController(&m_listFooter, this, &m_listHeader, &m_listFooter),
   m_listFooter(&m_listHeader, &m_listController, &m_listController, ButtonRowController::Position::Bottom, ButtonRowController::Style::EmbossedGrey),
diff --git a/apps/sequence/app.h b/apps/sequence/app.h
index c63f24f30..f514839e8 100644
--- a/apps/sequence/app.h
+++ b/apps/sequence/app.h
@@ -8,11 +8,11 @@
 #include "graph/curve_view_range.h"
 #include "list/list_controller.h"
 #include "values/values_controller.h"
-#include "../shared/storage_function_app.h"
+#include "../shared/function_app.h"
 
 namespace Sequence {
 
-class App : public Shared::StorageFunctionApp {
+class App : public Shared::FunctionApp {
 public:
   class Descriptor : public ::App::Descriptor {
   public:
@@ -20,7 +20,7 @@ public:
     I18n::Message upperName() override;
     const Image * icon() override;
   };
-  class Snapshot : public Shared::StorageFunctionApp::Snapshot {
+  class Snapshot : public Shared::FunctionApp::Snapshot {
   public:
     Snapshot();
     App * unpack(Container * container) override;
@@ -38,7 +38,7 @@ public:
   // NestedMenuController * variableBoxForInputEventHandler(InputEventHandler * textInput) override;
   char XNT() override;
   SequenceContext * localContext() override;
-  SequenceStore * functionStore() override { return static_cast<SequenceStore *>(Shared::StorageFunctionApp::functionStore()); }
+  SequenceStore * functionStore() override { return static_cast<SequenceStore *>(Shared::FunctionApp::functionStore()); }
 private:
   App(Container * container, Snapshot * snapshot);
   SequenceContext m_sequenceContext;
diff --git a/apps/sequence/graph/curve_parameter_controller.cpp b/apps/sequence/graph/curve_parameter_controller.cpp
index 9ba0be189..6521148ec 100644
--- a/apps/sequence/graph/curve_parameter_controller.cpp
+++ b/apps/sequence/graph/curve_parameter_controller.cpp
@@ -7,7 +7,7 @@ using namespace Shared;
 namespace Sequence {
 
 CurveParameterController::CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, GraphController * graphController, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  StorageFunctionCurveParameterController(graphRange, cursor),
+  FunctionCurveParameterController(graphRange, cursor),
   m_goToParameterController(this, inputEventHandlerDelegate, graphRange, cursor, I18n::Message::N),
   m_sumCell(I18n::Message::TermSum),
   m_graphController(graphController)
diff --git a/apps/sequence/graph/curve_parameter_controller.h b/apps/sequence/graph/curve_parameter_controller.h
index 7a5bf923a..d3cf4e728 100644
--- a/apps/sequence/graph/curve_parameter_controller.h
+++ b/apps/sequence/graph/curve_parameter_controller.h
@@ -9,7 +9,7 @@ namespace Sequence {
 
 class GraphController;
 
-class CurveParameterController : public Shared::StorageFunctionCurveParameterController {
+class CurveParameterController : public Shared::FunctionCurveParameterController {
 public:
   CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, GraphController * graphController, Shared::InteractiveCurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
diff --git a/apps/sequence/graph/go_to_parameter_controller.cpp b/apps/sequence/graph/go_to_parameter_controller.cpp
index e373e15fb..93d97f983 100644
--- a/apps/sequence/graph/go_to_parameter_controller.cpp
+++ b/apps/sequence/graph/go_to_parameter_controller.cpp
@@ -6,7 +6,7 @@ namespace Sequence {
 
 bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
   assert(parameterIndex == 0);
-  return Shared::StorageFunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::round(f));
+  return Shared::FunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::round(f));
 }
 
 }
diff --git a/apps/sequence/graph/go_to_parameter_controller.h b/apps/sequence/graph/go_to_parameter_controller.h
index d7424d184..2021aa018 100644
--- a/apps/sequence/graph/go_to_parameter_controller.h
+++ b/apps/sequence/graph/go_to_parameter_controller.h
@@ -5,9 +5,9 @@
 
 namespace Sequence {
 
-class GoToParameterController : public Shared::StorageFunctionGoToParameterController {
+class GoToParameterController : public Shared::FunctionGoToParameterController {
 public:
-  using Shared::StorageFunctionGoToParameterController::StorageFunctionGoToParameterController;
+  using Shared::FunctionGoToParameterController::FunctionGoToParameterController;
 private:
   bool setParameterAtIndex(int parameterIndex, double f) override;
 };
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 6e33b612f..f141eba34 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -11,7 +11,7 @@ static inline int minInt(int x, int y) { return (x < y ? x : y); }
 static inline int maxInt(int x, int y) { return (x > y ? x : y); }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
-  StorageFunctionGraphController(parentResponder, inputEventHandlerDelegate, header, graphRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
+  FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, graphRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
   m_bannerView(),
   m_view(sequenceStore, graphRange, m_cursor, &m_bannerView, &m_cursorView),
   m_graphRange(graphRange),
@@ -40,7 +40,7 @@ float GraphController::interestingXMin() const {
 }
 
 float GraphController::interestingXHalfRange() const {
-  float standardRange = Shared::StorageFunctionGraphController::interestingXHalfRange();
+  float standardRange = Shared::FunctionGraphController::interestingXHalfRange();
   int nmin = INT_MAX;
   int nmax = 0;
   int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
@@ -57,7 +57,7 @@ float GraphController::interestingXHalfRange() const {
 bool GraphController::handleEnter() {
   Ion::Storage::Record record = functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor());
   m_termSumController.setRecord(record);
-  return StorageFunctionGraphController::handleEnter();
+  return FunctionGraphController::handleEnter();
 }
 
 bool GraphController::moveCursorHorizontally(int direction) {
@@ -84,7 +84,7 @@ bool GraphController::moveCursorHorizontally(int direction) {
 }
 
 double GraphController::defaultCursorAbscissa() {
-  return std::round(Shared::StorageFunctionGraphController::defaultCursorAbscissa());
+  return std::round(Shared::FunctionGraphController::defaultCursorAbscissa());
 }
 
 }
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 1cdc56c46..0aac68efd 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -12,7 +12,7 @@
 
 namespace Sequence {
 
-class GraphController final : public Shared::StorageFunctionGraphController {
+class GraphController final : public Shared::FunctionGraphController {
 public:
   GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
@@ -28,7 +28,7 @@ private:
   bool moveCursorHorizontally(int direction) override;
   double defaultCursorAbscissa() override;
   CurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
-  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::StorageFunctionGraphController::functionStore()); }
+  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::FunctionGraphController::functionStore()); }
   GraphView * functionGraphView() override { return &m_view; }
   View * cursorView() override {
     return &m_cursorView;
diff --git a/apps/sequence/graph/graph_view.cpp b/apps/sequence/graph/graph_view.cpp
index 9912b2ade..1577b2e1d 100644
--- a/apps/sequence/graph/graph_view.cpp
+++ b/apps/sequence/graph/graph_view.cpp
@@ -7,13 +7,13 @@ namespace Sequence {
 
 GraphView::GraphView(SequenceStore * sequenceStore, InteractiveCurveViewRange * graphRange,
   CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
-  StorageFunctionGraphView(graphRange, cursor, bannerView, cursorView),
+  FunctionGraphView(graphRange, cursor, bannerView, cursorView),
   m_sequenceStore(sequenceStore)
 {
 }
 
 void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
-  StorageFunctionGraphView::drawRect(ctx, rect);
+  FunctionGraphView::drawRect(ctx, rect);
   for (int i = 0; i < m_sequenceStore->numberOfActiveFunctions(); i++) {
     Ion::Storage::Record record = m_sequenceStore->activeRecordAtIndex(i);
     Sequence * s = m_sequenceStore->modelForRecord(record);;
diff --git a/apps/sequence/graph/graph_view.h b/apps/sequence/graph/graph_view.h
index 291ddf8fe..1f0fce5c3 100644
--- a/apps/sequence/graph/graph_view.h
+++ b/apps/sequence/graph/graph_view.h
@@ -6,7 +6,7 @@
 
 namespace Sequence {
 
-class GraphView : public Shared::StorageFunctionGraphView {
+class GraphView : public Shared::FunctionGraphView {
 public:
   GraphView(SequenceStore * sequenceStore, Shared::InteractiveCurveViewRange * graphRange,
     Shared::CurveViewCursor * cursor, Shared::BannerView * bannerView, View * cursorView);
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index be27cea2f..8126f0577 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -48,7 +48,7 @@ double TermSumController::cursorNextStep(double x, int direction) {
   return std::round(m_cursor->x()+delta);
 }
 
-Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) {
+Layout TermSumController::createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) {
   Sequence * sequence = static_cast<Sequence *>(function.pointer());
   return sequence->nameLayout();
 }
diff --git a/apps/sequence/graph/term_sum_controller.h b/apps/sequence/graph/term_sum_controller.h
index 5d7e4b31b..9f00cacc8 100644
--- a/apps/sequence/graph/term_sum_controller.h
+++ b/apps/sequence/graph/term_sum_controller.h
@@ -17,7 +17,7 @@ private:
   bool moveCursorHorizontallyToPosition(double position) override;
   I18n::Message legendMessageAtStep(Step step) override;
   double cursorNextStep(double position, int direction) override;
-  Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::StorageFunction> function) override;
+  Poincare::Layout createFunctionLayout(Shared::ExpiringPointer<Shared::Function> function) override;
 };
 
 }
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 61c52b8ff..08aab769f 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -10,7 +10,7 @@ static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { retur
 namespace Sequence {
 
 ListController::ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, ButtonRowController * footer) :
-  Shared::StorageFunctionListController(parentResponder, header, footer, I18n::Message::AddSequence),
+  Shared::FunctionListController(parentResponder, header, footer, I18n::Message::AddSequence),
   m_sequenceTitleCells{},
   m_expressionCells{},
   m_parameterController(inputEventHandlerDelegate, this),
@@ -61,7 +61,7 @@ KDCoordinate ListController::expressionRowHeight(int j) {
 }
 
 void ListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  Shared::StorageFunctionListController::willDisplayCellAtLocation(cell, i, j);
+  Shared::FunctionListController::willDisplayCellAtLocation(cell, i, j);
   EvenOddCell * myCell = (EvenOddCell *)cell;
   myCell->setEven(modelIndexForRow(j)%2 == 0);
 }
@@ -278,7 +278,7 @@ void ListController::editExpression(Ion::Events::Event event) {
   editExpression(sequenceDefinitionForRow(selectedRow()), event);
 }
 
-void ListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model) {
+void ListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
   // Invalidate the sequences context cache
   static_cast<App *>(app())->localContext()->resetCache();
   Sequence * sequence = static_cast<Sequence *>(model.pointer());
@@ -306,7 +306,7 @@ void ListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionMo
 }
 
 bool ListController::removeModelRow(Ion::Storage::Record record) {
-  Shared::StorageFunctionListController::removeModelRow(record);
+  Shared::FunctionListController::removeModelRow(record);
   // Invalidate the sequences context cache
   static_cast<App *>(app())->localContext()->resetCache();
   return true;
diff --git a/apps/sequence/list/list_controller.h b/apps/sequence/list/list_controller.h
index 0bd1deb71..0606a6e5e 100644
--- a/apps/sequence/list/list_controller.h
+++ b/apps/sequence/list/list_controller.h
@@ -15,7 +15,7 @@
 
 namespace Sequence {
 
-class ListController : public Shared::StorageFunctionListController, public Shared::InputEventHandlerDelegate, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
+class ListController : public Shared::FunctionListController, public Shared::InputEventHandlerDelegate, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
 public:
   ListController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, ButtonRowController * footer);
   const char * title() override;
@@ -41,10 +41,10 @@ private:
   bool isAddEmptyRow(int j) override;
   int sequenceDefinitionForRow(int j);
   void addEmptyModel() override;
-  void reinitSelectedExpression(Shared::ExpiringPointer<Shared::SingleExpressionModelHandle> model) override;
+  void reinitSelectedExpression(Shared::ExpiringPointer<Shared::ExpressionModelHandle> model) override;
   void editExpression(Ion::Events::Event event) override;
   bool removeModelRow(Ion::Storage::Record record) override;
-  SequenceStore * modelStore() override { return static_cast<SequenceStore *>(Shared::StorageFunctionListController::modelStore()); }
+  SequenceStore * modelStore() override { return static_cast<SequenceStore *>(Shared::FunctionListController::modelStore()); }
   constexpr static int k_maxNumberOfRows = 3*MaxNumberOfSequences;
   SequenceTitleCell m_sequenceTitleCells[k_maxNumberOfRows];
   Shared::FunctionExpressionCell m_expressionCells[k_maxNumberOfRows];
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index ba4ecb7cb..9ef1b7cb1 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -16,7 +16,7 @@ namespace Sequence {
 
 void Sequence::tidy() {
   m_definitionHandle.tidyName();
-  StorageFunction::tidy(); // m_definitionName.tidy()
+  Function::tidy(); // m_definitionName.tidy()
   m_firstInitialConditionHandle.tidy();
   m_firstInitialConditionHandle.tidyName();
   m_secondInitialConditionHandle.tidy();
@@ -87,11 +87,11 @@ bool Sequence::isDefined() {
   SequenceRecordData * data = recordData();
   switch (type()) {
     case Type::Explicit:
-      return StorageFunction::isDefined();
+      return Function::isDefined();
     case Type::SingleRecurrence:
-      return StorageFunction::isDefined() && data->firstInitialConditionSize() > 0;
+      return Function::isDefined() && data->firstInitialConditionSize() > 0;
     default:
-      return StorageFunction::isDefined() && data->firstInitialConditionSize() > 0 && data->secondInitialConditionSize() > 0;
+      return Function::isDefined() && data->firstInitialConditionSize() > 0 && data->secondInitialConditionSize() > 0;
   }
 }
 
@@ -99,11 +99,11 @@ bool Sequence::isEmpty() {
   SequenceRecordData * data = recordData();
   switch (type()) {
     case Type::Explicit:
-      return StorageFunction::isEmpty();
+      return Function::isEmpty();
     case Type::SingleRecurrence:
-      return StorageFunction::isEmpty() && data->firstInitialConditionSize() == 0;
+      return Function::isEmpty() && data->firstInitialConditionSize() == 0;
     default:
-      return StorageFunction::isEmpty() && data->firstInitialConditionSize() == 0 && data->secondInitialConditionSize() == 0;
+      return Function::isEmpty() && data->firstInitialConditionSize() == 0 && data->secondInitialConditionSize() == 0;
   }
 }
 
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index b6788ad6c..263c7aa41 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_SEQUENCE_H
 #define SEQUENCE_SEQUENCE_H
 
-#include "../shared/storage_function.h"
+#include "../shared/function.h"
 #include "sequence_context.h"
 #include <assert.h>
 
@@ -11,7 +11,7 @@ namespace Sequence {
  * or setSecondInitialConditionContent, the sequence context needs to
  * invalidate the cache because the sequences evaluations might have changed. */
 
-class Sequence : public Shared::StorageFunction {
+class Sequence : public Shared::Function {
 friend class SequenceStore;
 public:
   enum class Type : uint8_t {
@@ -20,7 +20,7 @@ public:
     DoubleRecurrence = 2
   };
   Sequence(Ion::Storage::Record record = Record()) :
-    StorageFunction(record),
+    Function(record),
     m_nameLayout() {}
   static char Symbol() { return 'n'; }
   void tidy() override;
@@ -94,9 +94,9 @@ private:
     uint16_t m_secondInitialConditionSize;
   };
 
-  class SequenceHandle : public Shared::ExpressionModelHandle {
+  class SequenceHandle : public Shared::ExpressionModel {
   public:
-    SequenceHandle() : Shared::ExpressionModelHandle(), m_name() {}
+    SequenceHandle() : Shared::ExpressionModel(), m_name() {}
     void tidyName() { m_name = Poincare::Layout(); }
     virtual Poincare::Layout name(Sequence * sequence);
   protected:
@@ -135,7 +135,7 @@ private:
 
   template<typename T> T templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const;
   size_t metaDataSize() const override { return sizeof(SequenceRecordData); }
-  const Shared::ExpressionModelHandle * handle() const override { return &m_definitionHandle; }
+  const Shared::ExpressionModel * handle() const override { return &m_definitionHandle; }
   SequenceRecordData * recordData() const;
   DefinitionHandle m_definitionHandle;
   FirstInitialConditionHandle m_firstInitialConditionHandle;
diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 6ede5a26a..3f96da4e8 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -42,7 +42,7 @@ void SequenceStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record
   m_sequences[cacheIndex] = Sequence(record);
 }
 
-Shared::SingleExpressionModelHandle * SequenceStore::memoizedModelAtIndex(int cacheIndex) const {
+Shared::ExpressionModelHandle * SequenceStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_sequences[cacheIndex];
 }
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 3db947705..a4127e977 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -9,9 +9,9 @@
 
 namespace Sequence {
 
-class SequenceStore : public Shared::StorageFunctionStore {
+class SequenceStore : public Shared::FunctionStore {
 public:
-  using Shared::StorageFunctionStore::StorageFunctionStore;
+  using Shared::FunctionStore::FunctionStore;
   char symbol() const override { return Sequence::Symbol(); }
   char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownN; }
   /* Sequence Store hold all its Sequences in an array. The Sequence pointers
@@ -34,7 +34,7 @@ private:
   /* We don't really use model memoization as the number of Sequence is limited
    * and we keep enough Sequences to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
   mutable Sequence m_sequences[MaxNumberOfSequences];
 };
 
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index ba497ab19..95dce6218 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -3,6 +3,7 @@ app_src += $(addprefix apps/shared/,\
   buffer_function_title_cell.cpp \
   buffer_text_view_with_text_field.cpp \
   button_with_separator.cpp \
+  cartesian_function.cpp\
   cursor_view.cpp \
   curve_view.cpp \
   curve_view_cursor.cpp \
@@ -10,8 +11,11 @@ app_src += $(addprefix apps/shared/,\
   double_pair_store.cpp \
   editable_cell_table_view_controller.cpp \
   expression_field_delegate_app.cpp \
+  expression_model.cpp \
   expression_model_handle.cpp \
   float_parameter_controller.cpp \
+  function.cpp \
+  function_app.cpp \
   function_expression_cell.cpp \
   function_title_cell.cpp \
   global_context.cpp \
@@ -39,12 +43,8 @@ app_src += $(addprefix apps/shared/,\
   scrollable_exact_approximate_expressions_view.cpp \
   separator_even_odd_buffer_text_cell.cpp \
   simple_interactive_curve_view_controller.cpp \
-  single_expression_model_handle.cpp\
-  storage_cartesian_function.cpp \
   storage_expression_model_list_controller.cpp \
   storage_expression_model_store.cpp \
-  storage_function.cpp \
-  storage_function_app.cpp \
   storage_function_banner_delegate.cpp \
   storage_function_curve_parameter_controller.cpp \
   storage_function_go_to_parameter_controller.cpp \
diff --git a/apps/shared/storage_cartesian_function.cpp b/apps/shared/cartesian_function.cpp
similarity index 72%
rename from apps/shared/storage_cartesian_function.cpp
rename to apps/shared/cartesian_function.cpp
index 4ce38c7fe..51eac961e 100644
--- a/apps/shared/storage_cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -1,4 +1,4 @@
-#include "storage_cartesian_function.h"
+#include "cartesian_function.h"
 #include "storage_expression_model_store.h"
 #include "poincare_helpers.h"
 #include <poincare/derivative.h>
@@ -12,7 +12,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-void StorageCartesianFunction::DefaultName(char buffer[], size_t bufferSize) {
+void CartesianFunction::DefaultName(char buffer[], size_t bufferSize) {
   constexpr int k_maxNumberOfDefaultLetterNames = 4;
   static constexpr const char k_defaultLetterNames[k_maxNumberOfDefaultLetterNames] = {
     'f', 'g', 'h', 'p'
@@ -43,7 +43,7 @@ void StorageCartesianFunction::DefaultName(char buffer[], size_t bufferSize) {
   assert(currentNumberLength >= 0 && currentNumberLength < availableBufferSize);
 }
 
-StorageCartesianFunction StorageCartesianFunction::NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName) {
+CartesianFunction CartesianFunction::NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName) {
   static int s_colorIndex = 0;
   // Create the record
   char nameBuffer[SymbolAbstract::k_maxNameSize];
@@ -57,15 +57,15 @@ StorageCartesianFunction StorageCartesianFunction::NewModel(Ion::Storage::Record
 
   // Return if error
   if (*error != Ion::Storage::Record::ErrorStatus::None) {
-    return StorageCartesianFunction();
+    return CartesianFunction();
   }
 
-  // Return the StorageCartesianFunction withthe new record
-  return StorageCartesianFunction(Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(baseName, Ion::Storage::funcExtension));
+  // Return the CartesianFunction withthe new record
+  return CartesianFunction(Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(baseName, Ion::Storage::funcExtension));
 }
 
-int StorageCartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg) {
-  // Fill buffer with f(x). Keep one char foderivativeSizer derivative sign.
+int CartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg) {
+  // Fill buffer with f(x). Keep size for derivative sign.
   int derivativeSize = UTF8Decoder::CharSizeOfCodePoint('\'');
   int numberOfChars = nameWithArgument(buffer, bufferSize - derivativeSize, arg);
   assert(numberOfChars + derivativeSize < bufferSize);
@@ -78,15 +78,15 @@ int StorageCartesianFunction::derivativeNameWithArgument(char * buffer, size_t b
   return numberOfChars + derivativeSize;
 }
 
-bool StorageCartesianFunction::displayDerivative() const {
+bool CartesianFunction::displayDerivative() const {
   return recordData()->displayDerivative();
 }
 
-void StorageCartesianFunction::setDisplayDerivative(bool display) {
+void CartesianFunction::setDisplayDerivative(bool display) {
   return recordData()->setDisplayDerivative(display);
 }
 
-double StorageCartesianFunction::approximateDerivative(double x, Poincare::Context * context) const {
+double CartesianFunction::approximateDerivative(double x, Poincare::Context * context) const {
   Poincare::Derivative derivative = Poincare::Derivative::Builder(expressionReduced(context).clone(), Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Poincare::Float<double>::Builder(x)); // derivative takes ownership of Poincare::Float<double>::Builder(x) and the clone of expression
   /* TODO: when we approximate derivative, we might want to simplify the
    * derivative here. However, we might want to do it once for all x (to avoid
@@ -94,7 +94,7 @@ double StorageCartesianFunction::approximateDerivative(double x, Poincare::Conte
   return PoincareHelpers::ApproximateToScalar<double>(derivative, *context);
 }
 
-double StorageCartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
+double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
   // TODO: this does not work yet because integral does not understand UnknownX
   Poincare::Integral integral = Poincare::Integral::Builder(expressionReduced(context).clone(), Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Integral takes ownership of args
   /* TODO: when we approximate integral, we might want to simplify the integral
@@ -103,35 +103,35 @@ double StorageCartesianFunction::sumBetweenBounds(double start, double end, Poin
   return PoincareHelpers::ApproximateToScalar<double>(integral, *context);
 }
 
-Expression::Coordinate2D StorageCartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
+Expression::Coordinate2D CartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
   const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
   return PoincareHelpers::NextMinimum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
-Expression::Coordinate2D StorageCartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
+Expression::Coordinate2D CartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
   const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
   return PoincareHelpers::NextMaximum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
-double StorageCartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
+double CartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
   const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
   return PoincareHelpers::NextRoot(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
-Expression::Coordinate2D StorageCartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Expression e) const {
+Expression::Coordinate2D CartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Expression e) const {
   const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
   return PoincareHelpers::NextIntersection(expressionReduced(context), unknownX, start, step, max, *context, e);
 }
 
-void * StorageCartesianFunction::Handle::expressionAddress(const Ion::Storage::Record * record) const {
+void * CartesianFunction::Model::expressionAddress(const Ion::Storage::Record * record) const {
   return (char *)record->value().buffer+sizeof(CartesianFunctionRecordData);
 }
 
-size_t StorageCartesianFunction::Handle::expressionSize(const Ion::Storage::Record * record) const {
+size_t CartesianFunction::Model::expressionSize(const Ion::Storage::Record * record) const {
   return record->value().size-sizeof(CartesianFunctionRecordData);
 }
 
-StorageCartesianFunction::CartesianFunctionRecordData * StorageCartesianFunction::recordData() const {
+CartesianFunction::CartesianFunctionRecordData * CartesianFunction::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
   return reinterpret_cast<CartesianFunctionRecordData *>(const_cast<void *>(d.buffer));
diff --git a/apps/shared/storage_cartesian_function.h b/apps/shared/cartesian_function.h
similarity index 80%
rename from apps/shared/storage_cartesian_function.h
rename to apps/shared/cartesian_function.h
index e7a4d5439..dae3a19a3 100644
--- a/apps/shared/storage_cartesian_function.h
+++ b/apps/shared/cartesian_function.h
@@ -1,19 +1,19 @@
-#ifndef SHARED_STORAGE_CARTESIAN_FUNCTION_H
-#define SHARED_STORAGE_CARTESIAN_FUNCTION_H
+#ifndef SHARED_CARTESIAN_FUNCTION_H
+#define SHARED_CARTESIAN_FUNCTION_H
 
 #include "global_context.h"
-#include "storage_function.h"
+#include "function.h"
 #include <poincare/symbol.h>
 
 namespace Shared {
 
-class StorageCartesianFunction : public StorageFunction {
+class CartesianFunction : public Function {
 public:
   static void DefaultName(char buffer[], size_t bufferSize);
   static char Symbol() { return 'x'; }
-  static StorageCartesianFunction NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName = nullptr);
-  StorageCartesianFunction(Ion::Storage::Record record = Record()) :
-    StorageFunction(record)
+  static CartesianFunction NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName = nullptr);
+  CartesianFunction(Ion::Storage::Record record = Record()) :
+    Function(record)
   {}
   Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableHandle()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownX); }
 
@@ -45,16 +45,16 @@ private:
      * the expression of the function, directly copied from the pool. */
     //char m_expression[0];
   };
-  class Handle : public ExpressionModelHandle {
+  class Model : public ExpressionModel {
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
     size_t expressionSize(const Ion::Storage::Record * record) const override;
   };
   size_t metaDataSize() const override { return sizeof(CartesianFunctionRecordData); }
-  const ExpressionModelHandle * handle() const override { return &m_handle; }
+  const ExpressionModel * handle() const override { return &m_model; }
   CartesianFunctionRecordData * recordData() const;
-  Handle m_handle;
+  Model m_model;
 };
 
 }
diff --git a/apps/shared/expression_model.cpp b/apps/shared/expression_model.cpp
new file mode 100644
index 000000000..54f7b7f28
--- /dev/null
+++ b/apps/shared/expression_model.cpp
@@ -0,0 +1,131 @@
+#include "expression_model.h"
+#include "global_context.h"
+#include "poincare_helpers.h"
+#include <poincare/horizontal_layout.h>
+#include <string.h>
+#include <cmath>
+#include <assert.h>
+
+using namespace Ion;
+using namespace Poincare;
+
+namespace Shared {
+
+static inline int maxInt(int x, int y) { return x > y ? x : y; }
+
+ExpressionModel::ExpressionModel() :
+  m_expression(),
+  m_layout(),
+  m_circular(-1)
+{
+}
+
+void ExpressionModel::text(const Storage::Record * record, char * buffer, size_t bufferSize) const {
+  Expression e = expressionClone(record);
+  if (e.isUninitialized() && bufferSize > 0) {
+    buffer[0] = 0;
+  } else {
+    e.serialize(buffer, bufferSize);
+  }
+}
+
+bool ExpressionModel::isCircularlyDefined(const Storage::Record * record, Poincare::Context * context) const {
+  if (m_circular == -1) {
+    m_circular = Expression::ExpressionWithoutSymbols(expressionClone(record), *context).isUninitialized();
+  }
+  return m_circular;
+}
+
+Expression ExpressionModel::expressionReduced(const Storage::Record * record, Poincare::Context * context) const {
+  if (m_expression.isUninitialized()) {
+    assert(record->fullName() != nullptr);
+    m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
+    PoincareHelpers::Simplify(&m_expression, *context);
+    // simplify might return an uninitialized Expression if interrupted
+    if (m_expression.isUninitialized()) {
+      m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
+    }
+  }
+  return m_expression;
+}
+
+Expression ExpressionModel::expressionClone(const Storage::Record * record) const {
+  assert(record->fullName() != nullptr);
+  /* A new Expression has to be created at each call (because it might be tempered with after calling) */
+  return Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
+}
+
+Layout ExpressionModel::layout(const Storage::Record * record) const {
+  if (m_layout.isUninitialized()) {
+    m_layout = PoincareHelpers::CreateLayout(expressionClone(record));
+    if (m_layout.isUninitialized()) {
+      m_layout = HorizontalLayout::Builder();
+    }
+  }
+  return m_layout;
+}
+
+Ion::Storage::Record::ErrorStatus ExpressionModel::setContent(Ion::Storage::Record * record, const char * c, char symbol, char unknownSymbol) {
+  Expression e = ExpressionModel::BuildExpressionFromText(c, symbol, unknownSymbol);
+  return setExpressionContent(record, e);
+}
+
+Ion::Storage::Record::ErrorStatus ExpressionModel::setExpressionContent(Ion::Storage::Record * record, Expression & newExpression) {
+  assert(record->fullName() != nullptr);
+  // Prepare the new data to be stored
+  Ion::Storage::Record::Data newData = record->value();
+  size_t previousExpressionSize = expressionSize(record);
+  size_t newExpressionSize = newExpression.isUninitialized() ? 0 : newExpression.size();
+  size_t previousDataSize = newData.size;
+  size_t newDataSize = previousDataSize - previousExpressionSize + newExpressionSize;
+  void * expAddress = expressionAddress(record);
+  // Update size of record to maximal size between previous and new data
+  newData.size = maxInt(previousDataSize, newDataSize);
+  Ion::Storage::Record::ErrorStatus error = record->setValue(newData);
+  if (error != Ion::Storage::Record::ErrorStatus::None) {
+    assert(error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable);
+    return error;
+  }
+  // Prepare the new data content
+  /* WARNING: expressionAddress() cannot be used while the metadata is invalid
+   * (as it is sometimes computed from metadata). Thus, the expression address
+   * is given as a parameter to updateNewDataWithExpression. */
+  updateNewDataWithExpression(record, newExpression, expAddress, newExpressionSize, previousExpressionSize);
+  // Set the data with the right size
+  newData.size = newDataSize;
+  error = record->setValue(newData);
+  // Any error would have occured at the first call to setValue
+  assert(error == Ion::Storage::Record::ErrorStatus::None);
+
+  /* Here we delete only the elements relative to the expression model kept in
+   * this handle. */
+  tidy();
+  return error;
+}
+
+void ExpressionModel::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize) {
+  if (!expressionToStore.isUninitialized()) {
+    memmove(expressionAddress, expressionToStore.addressInPool(), expressionToStoreSize);
+  }
+}
+
+void ExpressionModel::tidy() const {
+  m_layout = Layout();
+  m_expression = Expression();
+  m_circular = 0;
+}
+
+Poincare::Expression ExpressionModel::BuildExpressionFromText(const char * c, char symbol, char unknownSymbol) {
+  Expression expressionToStore;
+  // if c = "", we want to reinit the Expression
+  if (c && *c != 0) {
+    // Compute the expression to store, without replacing symbols
+    expressionToStore = Expression::Parse(c);
+    if (!expressionToStore.isUninitialized() && symbol != 0) {
+      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol), Symbol::Builder(unknownSymbol));
+    }
+  }
+  return expressionToStore;
+}
+
+}
diff --git a/apps/shared/expression_model.h b/apps/shared/expression_model.h
new file mode 100644
index 000000000..265a7b721
--- /dev/null
+++ b/apps/shared/expression_model.h
@@ -0,0 +1,42 @@
+#ifndef SHARED_EXPRESSION_MODEL_H
+#define SHARED_EXPRESSION_MODEL_H
+
+#include <poincare/context.h>
+#include <poincare/expression.h>
+#include <poincare/layout.h>
+
+namespace Shared {
+
+class ExpressionModel {
+public:
+  ExpressionModel();
+
+  // Getters
+  void text(const Ion::Storage::Record * record, char * buffer, size_t bufferSize) const;
+  Poincare::Expression expressionReduced(const Ion::Storage::Record * record, Poincare::Context * context) const;
+  Poincare::Expression expressionClone(const Ion::Storage::Record * record) const;
+  Poincare::Layout layout(const Ion::Storage::Record * record) const;
+
+  // Setters
+  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0, char unknownSymbol = 0);
+  Ion::Storage::Record::ErrorStatus setExpressionContent(Ion::Storage::Record * record, Poincare::Expression & e);
+
+  // Property
+  bool isCircularlyDefined(const Ion::Storage::Record * record, Poincare::Context * context) const;
+  virtual void * expressionAddress(const Ion::Storage::Record * record) const = 0;
+
+  virtual void tidy() const;
+protected:
+  // Setters helper
+  static Poincare::Expression BuildExpressionFromText(const char * c, char symbol = 0, char unknownSymbol = 0);
+  mutable Poincare::Expression m_expression;
+  mutable Poincare::Layout m_layout;
+private:
+  virtual void updateNewDataWithExpression(Ion::Storage::Record * record, Poincare::Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize);
+  virtual size_t expressionSize(const Ion::Storage::Record * record) const = 0;
+  mutable int m_circular;
+};
+
+}
+
+#endif
diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index c1c5674f6..be8713249 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -13,119 +13,17 @@ namespace Shared {
 
 static inline int maxInt(int x, int y) { return x > y ? x : y; }
 
-ExpressionModelHandle::ExpressionModelHandle() :
-  m_expression(),
-  m_layout(),
-  m_circular(-1)
+ExpressionModelHandle::ExpressionModelHandle(Storage::Record record) :
+  Storage::Record(record)
 {
 }
 
-void ExpressionModelHandle::text(const Storage::Record * record, char * buffer, size_t bufferSize) const {
-  Expression e = expressionClone(record);
-  if (e.isUninitialized() && bufferSize > 0) {
-    buffer[0] = 0;
-  } else {
-    e.serialize(buffer, bufferSize);
-  }
+bool ExpressionModelHandle::isDefined() {
+  return !isEmpty();
 }
 
-bool ExpressionModelHandle::isCircularlyDefined(const Storage::Record * record, Poincare::Context * context) const {
-  if (m_circular == -1) {
-    m_circular = Expression::ExpressionWithoutSymbols(expressionClone(record), *context).isUninitialized();
-  }
-  return m_circular;
-}
-
-Expression ExpressionModelHandle::expressionReduced(const Storage::Record * record, Poincare::Context * context) const {
-  if (m_expression.isUninitialized()) {
-    assert(record->fullName() != nullptr);
-    m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
-    PoincareHelpers::Simplify(&m_expression, *context);
-    // simplify might return an uninitialized Expression if interrupted
-    if (m_expression.isUninitialized()) {
-      m_expression = Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
-    }
-  }
-  return m_expression;
-}
-
-Expression ExpressionModelHandle::expressionClone(const Storage::Record * record) const {
-  assert(record->fullName() != nullptr);
-  /* A new Expression has to be created at each call (because it might be tempered with after calling) */
-  return Expression::ExpressionFromAddress(expressionAddress(record), expressionSize(record));
-}
-
-Layout ExpressionModelHandle::layout(const Storage::Record * record) const {
-  if (m_layout.isUninitialized()) {
-    m_layout = PoincareHelpers::CreateLayout(expressionClone(record));
-    if (m_layout.isUninitialized()) {
-      m_layout = HorizontalLayout::Builder();
-    }
-  }
-  return m_layout;
-}
-
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setContent(Ion::Storage::Record * record, const char * c, char symbol, char unknownSymbol) {
-  Expression e = ExpressionModelHandle::BuildExpressionFromText(c, symbol, unknownSymbol);
-  return setExpressionContent(record, e);
-}
-
-Ion::Storage::Record::ErrorStatus ExpressionModelHandle::setExpressionContent(Ion::Storage::Record * record, Expression & newExpression) {
-  assert(record->fullName() != nullptr);
-  // Prepare the new data to be stored
-  Ion::Storage::Record::Data newData = record->value();
-  size_t previousExpressionSize = expressionSize(record);
-  size_t newExpressionSize = newExpression.isUninitialized() ? 0 : newExpression.size();
-  size_t previousDataSize = newData.size;
-  size_t newDataSize = previousDataSize - previousExpressionSize + newExpressionSize;
-  void * expAddress = expressionAddress(record);
-  // Update size of record to maximal size between previous and new data
-  newData.size = maxInt(previousDataSize, newDataSize);
-  Ion::Storage::Record::ErrorStatus error = record->setValue(newData);
-  if (error != Ion::Storage::Record::ErrorStatus::None) {
-    assert(error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable);
-    return error;
-  }
-  // Prepare the new data content
-  /* WARNING: expressionAddress() cannot be used while the metadata is invalid
-   * (as it is sometimes computed from metadata). Thus, the expression address
-   * is given as a parameter to updateNewDataWithExpression. */
-  updateNewDataWithExpression(record, newExpression, expAddress, newExpressionSize, previousExpressionSize);
-  // Set the data with the right size
-  newData.size = newDataSize;
-  error = record->setValue(newData);
-  // Any error would have occured at the first call to setValue
-  assert(error == Ion::Storage::Record::ErrorStatus::None);
-
-  /* Here we delete only the elements relative to the expression model kept in
-   * this handle. */
-  tidy();
-  return error;
-}
-
-void ExpressionModelHandle::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize) {
-  if (!expressionToStore.isUninitialized()) {
-    memmove(expressionAddress, expressionToStore.addressInPool(), expressionToStoreSize);
-  }
-}
-
-void ExpressionModelHandle::tidy() const {
-  m_layout = Layout();
-  m_expression = Expression();
-  m_circular = 0;
-}
-
-Poincare::Expression ExpressionModelHandle::BuildExpressionFromText(const char * c, char symbol, char unknownSymbol) {
-  Expression expressionToStore;
-  // if c = "", we want to reinit the Expression
-  if (c && *c != 0) {
-    // Compute the expression to store, without replacing symbols
-    expressionToStore = Expression::Parse(c);
-    if (!expressionToStore.isUninitialized() && symbol != 0) {
-      expressionToStore = expressionToStore.replaceUnknown(Symbol::Builder(symbol), Symbol::Builder(unknownSymbol));
-    }
-  }
-  return expressionToStore;
+bool ExpressionModelHandle::isEmpty() {
+  return value().size <= metaDataSize();
 }
 
 }
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index dbfb98781..0dc368cfa 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -1,42 +1,41 @@
 #ifndef SHARED_EXPRESSION_MODEL_HANDLE_H
 #define SHARED_EXPRESSION_MODEL_HANDLE_H
 
-#include <poincare/context.h>
-#include <poincare/expression.h>
-#include <poincare/layout.h>
+#include "expression_model.h"
 
 namespace Shared {
 
-// ExpressionModelHandle is a handle to Ion::Record
+//ExpressionModelHandle is a handle for Ion::Record
 
-class ExpressionModelHandle {
+class ExpressionModelHandle : public Ion::Storage::Record {
 public:
-  ExpressionModelHandle();
-
-  // Getters
-  void text(const Ion::Storage::Record * record, char * buffer, size_t bufferSize) const;
-  Poincare::Expression expressionReduced(const Ion::Storage::Record * record, Poincare::Context * context) const;
-  Poincare::Expression expressionClone(const Ion::Storage::Record * record) const;
-  Poincare::Layout layout(const Ion::Storage::Record * record) const;
-
-  // Setters
-  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0, char unknownSymbol = 0);
-  Ion::Storage::Record::ErrorStatus setExpressionContent(Ion::Storage::Record * record, Poincare::Expression & e);
+  ExpressionModelHandle(Ion::Storage::Record record = Ion::Storage::Record());
 
   // Property
-  bool isCircularlyDefined(const Ion::Storage::Record * record, Poincare::Context * context) const;
-  virtual void * expressionAddress(const Ion::Storage::Record * record) const = 0;
-
-  virtual void tidy() const;
+  void text(char * buffer, size_t bufferSize) const { return handle()->text(this, buffer, bufferSize); }
+  Poincare::Expression expressionReduced(Poincare::Context * context) const { return handle()->expressionReduced(this, context); }
+  Poincare::Expression expressionClone() const { return handle()->expressionClone(this); }
+  Poincare::Layout layout() { return handle()->layout(this); }
+   /* Here, isDefined is the exact contrary of isEmpty. However, for Sequence
+   * inheriting from ExpressionModelHandle, isEmpty and isDefined have not exactly
+   * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
+   * not defined. We thus have to keep both methods. */
+  virtual bool isDefined();
+  virtual bool isEmpty();
+  virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
+  /* tidy is responsible to tidy the whole model whereas tidyExpressionModel
+   * tidies only the members associated with the ExpressionModel. In
+   * ExpressionModel, tidy and tidyExpressionModel trigger the same
+   * behaviour but it is not true for its child classes (for example, in
+   * Sequence). */
+  virtual void tidy() { handle()->tidy(); }
+  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c); }
+  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableHandle()->setExpressionContent(this, e); }
 protected:
-  // Setters helper
-  static Poincare::Expression BuildExpressionFromText(const char * c, char symbol = 0, char unknownSymbol = 0);
-  mutable Poincare::Expression m_expression;
-  mutable Poincare::Layout m_layout;
-private:
-  virtual void updateNewDataWithExpression(Ion::Storage::Record * record, Poincare::Expression & expressionToStore, void * expressionAddress, size_t expressionToStoreSize, size_t previousExpressionSize);
-  virtual size_t expressionSize(const Ion::Storage::Record * record) const = 0;
-  mutable int m_circular;
+  bool isCircularlyDefined(Poincare::Context * context) const { return handle()->isCircularlyDefined(this, context); }
+  ExpressionModel * editableHandle() { return const_cast<ExpressionModel *>(handle()); }
+  virtual const ExpressionModel * handle() const = 0;
+  virtual size_t metaDataSize() const = 0;
 };
 
 }
diff --git a/apps/shared/storage_function.cpp b/apps/shared/function.cpp
similarity index 73%
rename from apps/shared/storage_function.cpp
rename to apps/shared/function.cpp
index 2af979fd6..f08f1b1d1 100644
--- a/apps/shared/storage_function.cpp
+++ b/apps/shared/function.cpp
@@ -1,4 +1,4 @@
-#include "storage_function.h"
+#include "function.h"
 #include "poincare_helpers.h"
 #include <poincare/serialization_helper.h>
 #include "poincare/src/parsing/parser.h"
@@ -12,9 +12,9 @@ using namespace Poincare;
 
 namespace Shared {
 
-constexpr char StorageFunction::k_parenthesedArgument[];
+constexpr char Function::k_parenthesedArgument[];
 
-bool StorageFunction::BaseNameCompliant(const char * baseName, NameNotCompliantError * error) {
+bool Function::BaseNameCompliant(const char * baseName, NameNotCompliantError * error) {
   assert(baseName[0] != 0);
 
   UTF8Decoder decoder(baseName);
@@ -52,19 +52,19 @@ bool StorageFunction::BaseNameCompliant(const char * baseName, NameNotCompliantE
   return true;
 }
 
-bool StorageFunction::isActive() const {
+bool Function::isActive() const {
   return recordData()->isActive();
 }
 
-KDColor StorageFunction::color() const {
+KDColor Function::color() const {
   return recordData()->color();
 }
 
-void StorageFunction::setActive(bool active) {
+void Function::setActive(bool active) {
   recordData()->setActive(active);
 }
 
-int StorageFunction::nameWithArgument(char * buffer, size_t bufferSize, char arg) {
+int Function::nameWithArgument(char * buffer, size_t bufferSize, char arg) {
   const char * functionName = fullName();
   size_t baseNameLength = SymbolAbstract::TruncateExtension(buffer, functionName, bufferSize - k_parenthesedArgumentLength);
   int result = baseNameLength + strlcpy(&buffer[baseNameLength], k_parenthesedArgument, bufferSize-baseNameLength);
@@ -75,7 +75,7 @@ int StorageFunction::nameWithArgument(char * buffer, size_t bufferSize, char arg
 }
 
 template<typename T>
-T StorageFunction::templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const {
+T Function::templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const {
   if (isCircularlyDefined(context)) {
     return NAN;
   }
@@ -85,7 +85,7 @@ T StorageFunction::templatedApproximateAtAbscissa(T x, Poincare::Context * conte
   return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(context), unknownX, x, *context);
 }
 
-StorageFunction::FunctionRecordData * StorageFunction::recordData() const {
+Function::FunctionRecordData * Function::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
   return reinterpret_cast<FunctionRecordData *>(const_cast<void *>(d.buffer));
@@ -93,5 +93,5 @@ StorageFunction::FunctionRecordData * StorageFunction::recordData() const {
 
 }
 
-template float Shared::StorageFunction::templatedApproximateAtAbscissa<float>(float, Poincare::Context*, char) const;
-template double Shared::StorageFunction::templatedApproximateAtAbscissa<double>(double, Poincare::Context*, char) const;
+template float Shared::Function::templatedApproximateAtAbscissa<float>(float, Poincare::Context*, char) const;
+template double Shared::Function::templatedApproximateAtAbscissa<double>(double, Poincare::Context*, char) const;
diff --git a/apps/shared/storage_function.h b/apps/shared/function.h
similarity index 89%
rename from apps/shared/storage_function.h
rename to apps/shared/function.h
index 047479735..9a93e6a50 100644
--- a/apps/shared/storage_function.h
+++ b/apps/shared/function.h
@@ -1,13 +1,13 @@
-#ifndef SHARED_STORAGE_FUNCTION_H
-#define SHARED_STORAGE_FUNCTION_H
+#ifndef SHARED_FUNCTION_H
+#define SHARED_FUNCTION_H
 
 #include <poincare/function.h>
 #include <poincare/symbol.h>
-#include "single_expression_model_handle.h"
+#include "expression_model_handle.h"
 
 namespace Shared {
 
-class StorageFunction : public SingleExpressionModelHandle {
+class Function : public ExpressionModelHandle {
 public:
   enum class NameNotCompliantError {
     None = 0,
@@ -21,7 +21,7 @@ public:
   static bool BaseNameCompliant(const char * baseName, NameNotCompliantError * error = nullptr);
 
   // Constructors
-  StorageFunction(Ion::Storage::Record record) : SingleExpressionModelHandle(record){}
+  Function(Ion::Storage::Record record) : ExpressionModelHandle(record){}
 
   // Properties
   bool isActive() const;
diff --git a/apps/shared/storage_function_app.cpp b/apps/shared/function_app.cpp
similarity index 73%
rename from apps/shared/storage_function_app.cpp
rename to apps/shared/function_app.cpp
index c4dcc295e..58d3f9f3b 100644
--- a/apps/shared/storage_function_app.cpp
+++ b/apps/shared/function_app.cpp
@@ -1,11 +1,11 @@
-#include "storage_function_app.h"
+#include "function_app.h"
 #include "../apps_container.h"
 
 using namespace Poincare;
 
 namespace Shared {
 
-StorageFunctionApp::Snapshot::Snapshot() :
+FunctionApp::Snapshot::Snapshot() :
   m_cursor(),
   m_interval(),
   m_indexFunctionSelectedByCursor(0),
@@ -18,7 +18,7 @@ StorageFunctionApp::Snapshot::Snapshot() :
   m_interval.setStep(1);
 }
 
-void StorageFunctionApp::Snapshot::reset() {
+void FunctionApp::Snapshot::reset() {
   m_interval.setStart(0);
   m_interval.setEnd(10);
   m_interval.setStep(1);
@@ -28,11 +28,11 @@ void StorageFunctionApp::Snapshot::reset() {
   setActiveTab(0);
 }
 
-void StorageFunctionApp::Snapshot::storageDidChangeForRecord(const Ion::Storage::Record record) {
+void FunctionApp::Snapshot::storageDidChangeForRecord(const Ion::Storage::Record record) {
   functionStore()->storageDidChangeForRecord(record);
 }
 
-void StorageFunctionApp::willBecomeInactive() {
+void FunctionApp::willBecomeInactive() {
   if (m_modalViewController.isDisplayingModal()) {
     m_modalViewController.dismissModalViewController();
   }
@@ -42,7 +42,7 @@ void StorageFunctionApp::willBecomeInactive() {
   ::App::willBecomeInactive();
 }
 
-bool StorageFunctionApp::isAcceptableExpression(const Poincare::Expression expression) {
+bool FunctionApp::isAcceptableExpression(const Poincare::Expression expression) {
   if (!TextFieldDelegateApp::ExpressionCanBeSerialized(expression, false, Expression())) {
     return false;
   }
diff --git a/apps/shared/storage_function_app.h b/apps/shared/function_app.h
similarity index 77%
rename from apps/shared/storage_function_app.h
rename to apps/shared/function_app.h
index 23e089e28..b9c784480 100644
--- a/apps/shared/storage_function_app.h
+++ b/apps/shared/function_app.h
@@ -10,7 +10,7 @@ class AppsContainer;
 
 namespace Shared {
 
-class StorageFunctionApp : public ExpressionFieldDelegateApp {
+class FunctionApp : public ExpressionFieldDelegateApp {
 public:
   class Snapshot : public ::App::Snapshot, public TabViewDataSource {
   public:
@@ -19,7 +19,7 @@ public:
     uint32_t * modelVersion() { return &m_modelVersion; }
     uint32_t * rangeVersion() { return &m_rangeVersion; }
     Poincare::Preferences::AngleUnit * angleUnitVersion() { return &m_angleUnitVersion; }
-    virtual StorageFunctionStore * functionStore() = 0;
+    virtual FunctionStore * functionStore() = 0;
     Interval * interval() { return &m_interval; }
     int * indexFunctionSelectedByCursor() { return &m_indexFunctionSelectedByCursor; }
     void reset() override;
@@ -33,13 +33,13 @@ public:
     uint32_t m_rangeVersion;
     Poincare::Preferences::AngleUnit m_angleUnitVersion;
  };
-  virtual ~StorageFunctionApp() = default;
-  virtual StorageFunctionStore * functionStore() { return static_cast<StorageFunctionApp::Snapshot *>(snapshot())->functionStore(); }
+  virtual ~FunctionApp() = default;
+  virtual FunctionStore * functionStore() { return static_cast<FunctionApp::Snapshot *>(snapshot())->functionStore(); }
   virtual InputViewController * inputViewController() = 0;
   void willBecomeInactive() override;
 
 protected:
-  StorageFunctionApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
+  FunctionApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
     ExpressionFieldDelegateApp(container, snapshot, rootViewController)
   {}
   // TextFieldDelegateApp
diff --git a/apps/shared/global_context.cpp b/apps/shared/global_context.cpp
index 9904d433d..fc26e28d5 100644
--- a/apps/shared/global_context.cpp
+++ b/apps/shared/global_context.cpp
@@ -1,5 +1,5 @@
 #include "global_context.h"
-#include "storage_cartesian_function.h"
+#include "cartesian_function.h"
 #include <poincare/helpers.h>
 #include <poincare/undefined.h>
 #include <poincare/preferences.h>
@@ -45,7 +45,7 @@ Poincare::Expression GlobalContext::ExpressionFromFunctionRecord(Ion::Storage::R
   }
   /* An function record value has metadata before the expression. To get the
    * expression, use the function record handle. */
-  StorageCartesianFunction f = StorageCartesianFunction(record);
+  CartesianFunction f = CartesianFunction(record);
   return f.expressionClone();
 }
 
@@ -116,13 +116,13 @@ Ion::Storage::Record::ErrorStatus GlobalContext::SetExpressionForFunctionRecord(
   if (!Ion::Storage::FullNameHasExtension(previousRecord.fullName(), Ion::Storage::funcExtension, strlen(Ion::Storage::funcExtension))) {
     // The previous record was not a function. Destroy it and create the new record.
     previousRecord.destroy();
-    StorageCartesianFunction newModel = StorageCartesianFunction::NewModel(&error, baseName);
+    CartesianFunction newModel = CartesianFunction::NewModel(&error, baseName);
     if (error != Ion::Storage::Record::ErrorStatus::None) {
       return error;
     }
     recordToSet = newModel;
   }
-  error = StorageCartesianFunction(recordToSet).setExpressionContent(expressionToStore);
+  error = CartesianFunction(recordToSet).setExpressionContent(expressionToStore);
   return error;
 }
 
diff --git a/apps/shared/single_expression_model_handle.cpp b/apps/shared/single_expression_model_handle.cpp
deleted file mode 100644
index ef0037c73..000000000
--- a/apps/shared/single_expression_model_handle.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-#include "single_expression_model_handle.h"
-#include "global_context.h"
-#include "poincare_helpers.h"
-#include <poincare/horizontal_layout.h>
-#include <string.h>
-#include <cmath>
-#include <assert.h>
-
-using namespace Ion;
-using namespace Poincare;
-
-namespace Shared {
-
-SingleExpressionModelHandle::SingleExpressionModelHandle(Storage::Record record) :
-  Storage::Record(record)
-{
-}
-
-bool SingleExpressionModelHandle::isDefined() {
-  return !isEmpty();
-}
-
-bool SingleExpressionModelHandle::isEmpty() {
-  return value().size <= metaDataSize();
-}
-
-}
diff --git a/apps/shared/single_expression_model_handle.h b/apps/shared/single_expression_model_handle.h
deleted file mode 100644
index 3700e0fd9..000000000
--- a/apps/shared/single_expression_model_handle.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef SHARED_SINGLE_EXPRESSION_MODEL_HANDLE_H
-#define SHARED_SINGLE_EXPRESSION_MODEL_HANDLE_H
-
-#include "expression_model_handle.h"
-
-namespace Shared {
-
-
-class SingleExpressionModelHandle : public Ion::Storage::Record {
-public:
-  SingleExpressionModelHandle(Ion::Storage::Record record = Ion::Storage::Record());
-
-  // Property
-  void text(char * buffer, size_t bufferSize) const { return handle()->text(this, buffer, bufferSize); }
-  Poincare::Expression expressionReduced(Poincare::Context * context) const { return handle()->expressionReduced(this, context); }
-  Poincare::Expression expressionClone() const { return handle()->expressionClone(this); }
-  Poincare::Layout layout() { return handle()->layout(this); }
-  /* TODO This comment will be true when Sequence inherits from this class
-   * Here, isDefined is the exact contrary of isEmpty. However, for Sequence
-   * inheriting from ExpressionModel, isEmpty and isDefined have not exactly
-   * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
-   * not defined. We thus have to keep both methods. */
-  virtual bool isDefined();
-  virtual bool isEmpty();
-  virtual bool shouldBeClearedBeforeRemove() { return !isEmpty(); }
-  /* tidy is responsible to tidy the whole model whereas tidyExpressionModel
-   * tidies only the members associated with the ExpressionModel. In
-   * ExpressionModelHandle, tidy and tidyExpressionModel trigger the same
-   * behaviour but it is not true for its child classes (for example, in
-   * Sequence). */
-  virtual void tidy() { handle()->tidy(); }
-  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c); }
-  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableHandle()->setExpressionContent(this, e); }
-protected:
-  bool isCircularlyDefined(Poincare::Context * context) const { return handle()->isCircularlyDefined(this, context); }
-  ExpressionModelHandle * editableHandle() { return const_cast<ExpressionModelHandle *>(handle()); }
-  virtual const ExpressionModelHandle * handle() const = 0;
-  virtual size_t metaDataSize() const = 0;
-};
-
-}
-
-#endif
diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/storage_expression_model_list_controller.cpp
index 1a823d9cb..021974647 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/storage_expression_model_list_controller.cpp
@@ -145,7 +145,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
   if (isAddEmptyRow(j)) {
     return Metric::StoreRowHeight;
   }
-  ExpiringPointer<SingleExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   if (m->layout().isUninitialized()) {
     return Metric::StoreRowHeight;
   }
@@ -156,7 +156,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
 
 void StorageExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   EvenOddExpressionCell * myCell = (EvenOddExpressionCell *)cell;
-  ExpiringPointer<SingleExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
+  ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   myCell->setLayout(m->layout());
 }
 
@@ -176,7 +176,7 @@ bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::
   }
   if (event == Ion::Events::Backspace && !isAddEmptyRow(selectedRow())) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<SingleExpressionModelHandle> model =  modelStore()->modelForRecord(record);
+    ExpiringPointer<ExpressionModelHandle> model =  modelStore()->modelForRecord(record);
     if (model->shouldBeClearedBeforeRemove()) {
       reinitSelectedExpression(model);
     } else {
@@ -206,7 +206,7 @@ void StorageExpressionModelListController::addEmptyModel() {
   editExpression(Ion::Events::OK);
 }
 
-void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model) {
+void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
   model->setContent("");
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
@@ -230,7 +230,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
   char initialTextContent[initialTextContentMaxSize];
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-    ExpiringPointer<SingleExpressionModelHandle> model = modelStore()->modelForRecord(record);
+    ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
     model->text(initialTextContent, initialTextContentMaxSize);
     initialText = initialTextContent;
     // Replace Poincare::Symbol::SpecialSymbols::UnknownX with 'x'
@@ -252,7 +252,7 @@ bool StorageExpressionModelListController::editSelectedRecordWithText(const char
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
-  ExpiringPointer<SingleExpressionModelHandle> model = modelStore()->modelForRecord(record);
+  ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
   return (model->setContent(text) == Ion::Storage::Record::ErrorStatus::None);
 }
 
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/storage_expression_model_list_controller.h
index 078aa9078..b901ead42 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/storage_expression_model_list_controller.h
@@ -25,7 +25,7 @@ protected:
   bool handleEventOnExpression(Ion::Events::Event event);
   virtual void addEmptyModel();
   virtual void didChangeModelsList() { resetMemoization(); }
-  virtual void reinitSelectedExpression(ExpiringPointer<SingleExpressionModelHandle> model);
+  virtual void reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model);
   virtual void editExpression(Ion::Events::Event event);
   void replaceUnknownSymbolWithReadableSymbol(char * initialText);
   virtual bool editSelectedRecordWithText(const char * text);
diff --git a/apps/shared/storage_expression_model_store.cpp b/apps/shared/storage_expression_model_store.cpp
index 335d51a18..2a385730c 100644
--- a/apps/shared/storage_expression_model_store.cpp
+++ b/apps/shared/storage_expression_model_store.cpp
@@ -15,14 +15,14 @@ Ion::Storage::Record StorageExpressionModelStore::recordAtIndex(int i) const {
   return Ion::Storage::sharedStorage()->recordWithExtensionAtIndex(modelExtension(), i);
 }
 
-SingleExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
+ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
   for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (!memoizedModelAtIndex(i)->isNull() && *memoizedModelAtIndex(i) == record) {
       return memoizedModelAtIndex(i);
     }
   }
   setMemoizedModelAtIndex(m_oldestMemoizedIndex, record);
-  SingleExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
+  ExpressionModelHandle * result = memoizedModelAtIndex(m_oldestMemoizedIndex);
   m_oldestMemoizedIndex = (m_oldestMemoizedIndex+1) % maxNumberOfMemoizedModels();
   return result;
 }
@@ -44,7 +44,7 @@ void StorageExpressionModelStore::tidy() {
 int StorageExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) const {
   int result = 0;
   int i = 0;
-  SingleExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
+  ExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
   while (!m->isNull()) {
     if (test(m)) {
       result++;
@@ -59,7 +59,7 @@ Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(in
   int index = 0;
   int currentModelIndex = 0;
   Ion::Storage::Record r = recordAtIndex(currentModelIndex++);
-  SingleExpressionModelHandle * m = privateModelForRecord(r);
+  ExpressionModelHandle * m = privateModelForRecord(r);
   while (!m->isNull()) {
     assert(currentModelIndex <= numberOfModels());
     if (test(m)) {
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/storage_expression_model_store.h
index f5393e292..9d5e40ce4 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/storage_expression_model_store.h
@@ -1,7 +1,7 @@
 #ifndef SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 #define SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
 
-#include "single_expression_model_handle.h"
+#include "expression_model_handle.h"
 #include "expiring_pointer.h"
 #include <ion/storage.h>
 #include <assert.h>
@@ -21,10 +21,10 @@ public:
   // By default, the number of models is not bounded
   virtual int maxNumberOfModels() const { return -1; }
   int numberOfModels() const;
-  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](SingleExpressionModelHandle * m) { return m->isDefined(); }); }
+  int numberOfDefinedModels() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined(); }); }
   Ion::Storage::Record recordAtIndex(int i) const;
-  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](SingleExpressionModelHandle * m) { return m->isDefined(); }); }
-  ExpiringPointer<SingleExpressionModelHandle> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<SingleExpressionModelHandle>(privateModelForRecord(record)); }
+  Ion::Storage::Record definedRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined(); }); }
+  ExpiringPointer<ExpressionModelHandle> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<ExpressionModelHandle>(privateModelForRecord(record)); }
 
   // Add and Remove
   virtual Ion::Storage::Record::ErrorStatus addEmptyModel() = 0;
@@ -37,14 +37,14 @@ public:
 protected:
   constexpr static int k_maxNumberOfMemoizedModels = 10;
   int maxNumberOfMemoizedModels() const { return maxNumberOfModels() < 0 ? k_maxNumberOfMemoizedModels : maxNumberOfModels(); }
-  typedef bool (*ModelTest)(SingleExpressionModelHandle * model);
+  typedef bool (*ModelTest)(ExpressionModelHandle * model);
   int numberOfModelsSatisfyingTest(ModelTest test) const;
   Ion::Storage::Record recordStatifyingTestAtIndex(int i, ModelTest test) const;
-  SingleExpressionModelHandle * privateModelForRecord(Ion::Storage::Record record) const;
+  ExpressionModelHandle * privateModelForRecord(Ion::Storage::Record record) const;
 private:
   void resetMemoizedModelsExceptRecord(const Ion::Storage::Record record = Ion::Storage::Record()) const;
   virtual void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record) const = 0;
-  virtual SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const = 0;
+  virtual ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const = 0;
   virtual const char * modelExtension() const = 0;
   /* Memoization of k_maxNumberOfMemoizedModels. When the required model is not
    * present, we override the m_oldestMemoizedIndex model. This actually
diff --git a/apps/shared/storage_function_banner_delegate.cpp b/apps/shared/storage_function_banner_delegate.cpp
index a59d2bd07..381e07d49 100644
--- a/apps/shared/storage_function_banner_delegate.cpp
+++ b/apps/shared/storage_function_banner_delegate.cpp
@@ -6,8 +6,8 @@ using namespace Poincare;
 
 namespace Shared {
 
-void StorageFunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Ion::Storage::Record record, StorageFunctionStore * functionStore, char symbol) {
-  ExpiringPointer<StorageFunction> function = functionStore->modelForRecord(record);
+void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Ion::Storage::Record record, FunctionStore * functionStore, char symbol) {
+  ExpiringPointer<Function> function = functionStore->modelForRecord(record);
   constexpr int bufferSize = k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
diff --git a/apps/shared/storage_function_banner_delegate.h b/apps/shared/storage_function_banner_delegate.h
index 6d3ccd4e7..b0edcbf7c 100644
--- a/apps/shared/storage_function_banner_delegate.h
+++ b/apps/shared/storage_function_banner_delegate.h
@@ -7,11 +7,11 @@
 
 namespace Shared {
 
-class StorageFunctionBannerDelegate  {
+class FunctionBannerDelegate  {
 public:
   constexpr static int k_maxNumberOfCharacters = 50;
 protected:
-  void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Ion::Storage::Record record, StorageFunctionStore * functionStore, char symbol);
+  void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Ion::Storage::Record record, FunctionStore * functionStore, char symbol);
   virtual BannerView * bannerView() = 0;
 };
 
diff --git a/apps/shared/storage_function_curve_parameter_controller.cpp b/apps/shared/storage_function_curve_parameter_controller.cpp
index 90d26e570..14a71658a 100644
--- a/apps/shared/storage_function_curve_parameter_controller.cpp
+++ b/apps/shared/storage_function_curve_parameter_controller.cpp
@@ -3,7 +3,7 @@
 
 namespace Shared {
 
-StorageFunctionCurveParameterController::StorageFunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
+FunctionCurveParameterController::FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
   ViewController(nullptr),
   m_goToCell(I18n::Message::Goto),
   m_selectableTableView(this, this, this),
@@ -11,18 +11,18 @@ StorageFunctionCurveParameterController::StorageFunctionCurveParameterController
 {
 }
 
-View * StorageFunctionCurveParameterController::view() {
+View * FunctionCurveParameterController::view() {
   return &m_selectableTableView;
 }
 
-void StorageFunctionCurveParameterController::didBecomeFirstResponder() {
+void FunctionCurveParameterController::didBecomeFirstResponder() {
   if (selectedRow() < 0) {
     selectCellAtLocation(0, 0);
   }
   app()->setFirstResponder(&m_selectableTableView);
 }
 
-bool StorageFunctionCurveParameterController::handleGotoSelection() {
+bool FunctionCurveParameterController::handleGotoSelection() {
   if (m_record.isNull()) {
     return false;
   }
@@ -32,11 +32,11 @@ bool StorageFunctionCurveParameterController::handleGotoSelection() {
   return true;
 }
 
-KDCoordinate StorageFunctionCurveParameterController::cellHeight() {
+KDCoordinate FunctionCurveParameterController::cellHeight() {
   return Metric::ParameterCellHeight;
 }
 
-void StorageFunctionCurveParameterController::setRecord(Ion::Storage::Record record) {
+void FunctionCurveParameterController::setRecord(Ion::Storage::Record record) {
   m_record = record;
 }
 
diff --git a/apps/shared/storage_function_curve_parameter_controller.h b/apps/shared/storage_function_curve_parameter_controller.h
index e88f9a4ec..02c6236fa 100644
--- a/apps/shared/storage_function_curve_parameter_controller.h
+++ b/apps/shared/storage_function_curve_parameter_controller.h
@@ -8,9 +8,9 @@
 
 namespace Shared {
 
-class StorageFunctionCurveParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class FunctionCurveParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  StorageFunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor);
+  FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor);
   View * view() override;
   void didBecomeFirstResponder() override;
   KDCoordinate cellHeight() override;
@@ -21,7 +21,7 @@ protected:
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
 private:
-  virtual StorageFunctionGoToParameterController * goToParameterController() = 0;
+  virtual FunctionGoToParameterController * goToParameterController() = 0;
 };
 
 }
diff --git a/apps/shared/storage_function_go_to_parameter_controller.cpp b/apps/shared/storage_function_go_to_parameter_controller.cpp
index 622b3ccff..178d0e312 100644
--- a/apps/shared/storage_function_go_to_parameter_controller.cpp
+++ b/apps/shared/storage_function_go_to_parameter_controller.cpp
@@ -1,29 +1,29 @@
 #include "storage_function_go_to_parameter_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include <assert.h>
 #include <cmath>
 
 namespace Shared {
 
-StorageFunctionGoToParameterController::StorageFunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol) :
+FunctionGoToParameterController::FunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol) :
   GoToParameterController(parentResponder, inputEventHandlerDelegate, graphRange, cursor, symbol),
   m_record()
 {
 }
 
-const char * StorageFunctionGoToParameterController::title() {
+const char * FunctionGoToParameterController::title() {
   return I18n::translate(I18n::Message::Goto);
 }
 
-double StorageFunctionGoToParameterController::parameterAtIndex(int index) {
+double FunctionGoToParameterController::parameterAtIndex(int index) {
   assert(index == 0);
   return m_cursor->x();
 }
 
-bool StorageFunctionGoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
+bool FunctionGoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
   assert(parameterIndex == 0);
-  StorageFunctionApp * myApp = (StorageFunctionApp *)app();
-  ExpiringPointer<StorageFunction> function = myApp->functionStore()->modelForRecord(m_record);
+  FunctionApp * myApp = (FunctionApp *)app();
+  ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
   float y = function->evaluateAtAbscissa(f, myApp->localContext());
   if (std::fabs(f) > k_maxDisplayableFloat || std::fabs(y) > k_maxDisplayableFloat) {
     app()->displayWarning(I18n::Message::ForbiddenValue);
@@ -39,7 +39,7 @@ bool StorageFunctionGoToParameterController::setParameterAtIndex(int parameterIn
   return true;
 }
 
-void StorageFunctionGoToParameterController::setRecord(Ion::Storage::Record record) {
+void FunctionGoToParameterController::setRecord(Ion::Storage::Record record) {
   m_record = record;
 }
 
diff --git a/apps/shared/storage_function_go_to_parameter_controller.h b/apps/shared/storage_function_go_to_parameter_controller.h
index d5c0b898e..c06157225 100644
--- a/apps/shared/storage_function_go_to_parameter_controller.h
+++ b/apps/shared/storage_function_go_to_parameter_controller.h
@@ -2,13 +2,13 @@
 #define SHARED_STORAGE_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
 
 #include "go_to_parameter_controller.h"
-#include "storage_function.h"
+#include "function.h"
 
 namespace Shared {
 
-class StorageFunctionGoToParameterController : public GoToParameterController {
+class FunctionGoToParameterController : public GoToParameterController {
 public:
-  StorageFunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol);
+  FunctionGoToParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol);
   const char * title() override;
   void setRecord(Ion::Storage::Record record);
 protected:
diff --git a/apps/shared/storage_function_graph_controller.cpp b/apps/shared/storage_function_graph_controller.cpp
index bc34ce043..9263144f9 100644
--- a/apps/shared/storage_function_graph_controller.cpp
+++ b/apps/shared/storage_function_graph_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_function_graph_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include <assert.h>
 #include <cmath>
 #include <float.h>
@@ -8,7 +8,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageFunctionGraphController::StorageFunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion) :
+FunctionGraphController::FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion) :
   InteractiveCurveViewController(parentResponder, inputEventHandlerDelegate, header, interactiveRange, curveView, cursor, modelVersion, rangeVersion),
   m_initialisationParameterController(this, interactiveRange),
   m_angleUnitVersion(angleUnitVersion),
@@ -16,24 +16,24 @@ StorageFunctionGraphController::StorageFunctionGraphController(Responder * paren
 {
 }
 
-bool StorageFunctionGraphController::isEmpty() const {
+bool FunctionGraphController::isEmpty() const {
   if (functionStore()->numberOfActiveFunctions() == 0) {
     return true;
   }
   return false;
 }
 
-ViewController * StorageFunctionGraphController::initialisationParameterController() {
+ViewController * FunctionGraphController::initialisationParameterController() {
   return &m_initialisationParameterController;
 }
 
-void StorageFunctionGraphController::viewWillAppear() {
+void FunctionGraphController::viewWillAppear() {
   functionGraphView()->setCursorView(cursorView());
   functionGraphView()->setBannerView(bannerView());
   functionGraphView()->setAreaHighlight(NAN,NAN);
 
   if (functionGraphView()->context() == nullptr) {
-    StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+    FunctionApp * myApp = static_cast<FunctionApp *>(app());
     functionGraphView()->setContext(myApp->localContext());
   }
   Preferences::AngleUnit newAngleUnitVersion = Preferences::sharedPreferences()->angleUnit();
@@ -44,7 +44,7 @@ void StorageFunctionGraphController::viewWillAppear() {
   InteractiveCurveViewController::viewWillAppear();
 }
 
-bool StorageFunctionGraphController::handleEnter() {
+bool FunctionGraphController::handleEnter() {
   Ion::Storage::Record record = functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor());
   curveParameterController()->setRecord(record);
   StackViewController * stack = stackController();
@@ -52,15 +52,15 @@ bool StorageFunctionGraphController::handleEnter() {
   return true;
 }
 
-void StorageFunctionGraphController::selectFunctionWithCursor(int functionIndex) {
+void FunctionGraphController::selectFunctionWithCursor(int functionIndex) {
   *m_indexFunctionSelectedByCursor = functionIndex;
 }
 
-float StorageFunctionGraphController::cursorBottomMarginRatio() {
+float FunctionGraphController::cursorBottomMarginRatio() {
   return (cursorView()->minimalSizeForOptimalDisplay().height()/2+estimatedBannerHeight())/k_viewHeight;
 }
 
-void StorageFunctionGraphController::reloadBannerView() {
+void FunctionGraphController::reloadBannerView() {
   if (functionStore()->numberOfActiveFunctions() == 0) {
     return;
   }
@@ -68,16 +68,16 @@ void StorageFunctionGraphController::reloadBannerView() {
   reloadBannerViewForCursorOnFunction(m_cursor, record, functionStore(), functionStore()->symbol());
 }
 
-float StorageFunctionGraphController::displayBottomMarginRatio() {
+float FunctionGraphController::displayBottomMarginRatio() {
   return (cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
 }
 
-float StorageFunctionGraphController::estimatedBannerHeight() const {
+float FunctionGraphController::estimatedBannerHeight() const {
   return BannerView::HeightGivenNumberOfLines(estimatedBannerNumberOfLines());
 }
 
-InteractiveCurveViewRangeDelegate::Range StorageFunctionGraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   float min = FLT_MAX;
   float max = -FLT_MAX;
   float xMin = interactiveCurveViewRange->xMin();
@@ -89,7 +89,7 @@ InteractiveCurveViewRangeDelegate::Range StorageFunctionGraphController::compute
     return range;
   }
   for (int i=0; i<functionStore()->numberOfActiveFunctions(); i++) {
-    ExpiringPointer<StorageFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
+    ExpiringPointer<Function> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
     float y = 0.0f;
     float res = curveView()->resolution();
     /* Scan x-range from the middle to the extrema in order to get balanced
@@ -109,28 +109,28 @@ InteractiveCurveViewRangeDelegate::Range StorageFunctionGraphController::compute
   return range;
 }
 
-void StorageFunctionGraphController::initRangeParameters() {
+void FunctionGraphController::initRangeParameters() {
   interactiveCurveViewRange()->setDefault();
   initCursorParameters();
   selectFunctionWithCursor(0);
 }
 
-double StorageFunctionGraphController::defaultCursorAbscissa() {
+double FunctionGraphController::defaultCursorAbscissa() {
   return (interactiveCurveViewRange()->xMin()+interactiveCurveViewRange()->xMax())/2.0f;
 }
 
-StorageFunctionStore * StorageFunctionGraphController::functionStore() const {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+FunctionStore * FunctionGraphController::functionStore() const {
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   return myApp->functionStore();
 }
 
-void StorageFunctionGraphController::initCursorParameters() {
+void FunctionGraphController::initCursorParameters() {
   double x = defaultCursorAbscissa();
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   int functionIndex = 0;
   double y = 0;
   do {
-    ExpiringPointer<StorageFunction> firstFunction = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(functionIndex++));
+    ExpiringPointer<Function> firstFunction = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(functionIndex++));
     y = firstFunction->evaluateAtAbscissa(x, myApp->localContext());
   } while ((std::isnan(y) || std::isinf(y)) && functionIndex < functionStore()->numberOfActiveFunctions());
   m_cursor->moveTo(x, y);
@@ -141,9 +141,9 @@ void StorageFunctionGraphController::initCursorParameters() {
   }
 }
 
-bool StorageFunctionGraphController::moveCursorVertically(int direction) {
+bool FunctionGraphController::moveCursorVertically(int direction) {
   int currentActiveFunctionIndex = indexFunctionSelectedByCursor();
-  Poincare::Context * context = static_cast<StorageFunctionApp *>(app())->localContext();
+  Poincare::Context * context = static_cast<FunctionApp *>(app())->localContext();
 
   int nextActiveFunctionIndex = InteractiveCurveViewController::closestCurveIndexVertically(direction > 0, currentActiveFunctionIndex, context);
   if (nextActiveFunctionIndex < 0) {
@@ -155,31 +155,31 @@ bool StorageFunctionGraphController::moveCursorVertically(int direction) {
   return true;
 }
 
-CurveView * StorageFunctionGraphController::curveView() {
+CurveView * FunctionGraphController::curveView() {
   return functionGraphView();
 }
 
-uint32_t StorageFunctionGraphController::modelVersion() {
+uint32_t FunctionGraphController::modelVersion() {
   return functionStore()->storeChecksum();
 }
 
-uint32_t StorageFunctionGraphController::rangeVersion() {
+uint32_t FunctionGraphController::rangeVersion() {
   return interactiveCurveViewRange()->rangeChecksum();
 }
 
-bool StorageFunctionGraphController::isCursorVisible() {
+bool FunctionGraphController::isCursorVisible() {
   return interactiveCurveViewRange()->isCursorVisible(cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
 }
 
-bool StorageFunctionGraphController::closestCurveIndexIsSuitable(int newIndex, int currentIndex) const {
+bool FunctionGraphController::closestCurveIndexIsSuitable(int newIndex, int currentIndex) const {
   return newIndex != currentIndex;
 }
 
-double StorageFunctionGraphController::yValue(int curveIndex, double x, Poincare::Context * context) const {
+double FunctionGraphController::yValue(int curveIndex, double x, Poincare::Context * context) const {
   return functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(curveIndex))->evaluateAtAbscissa(x, context);
 }
 
-int StorageFunctionGraphController::numberOfCurves() const {
+int FunctionGraphController::numberOfCurves() const {
   return functionStore()->numberOfActiveFunctions();
 }
 
diff --git a/apps/shared/storage_function_graph_controller.h b/apps/shared/storage_function_graph_controller.h
index 6266f55f1..e6b8faa92 100644
--- a/apps/shared/storage_function_graph_controller.h
+++ b/apps/shared/storage_function_graph_controller.h
@@ -11,9 +11,9 @@
 
 namespace Shared {
 
-class StorageFunctionGraphController : public InteractiveCurveViewController, public StorageFunctionBannerDelegate {
+class FunctionGraphController : public InteractiveCurveViewController, public FunctionBannerDelegate {
 public:
-  StorageFunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header,  InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion);
+  FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header,  InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion);
   bool isEmpty() const override;
   ViewController * initialisationParameterController() override;
   void viewWillAppear() override;
@@ -26,14 +26,14 @@ protected:
   int indexFunctionSelectedByCursor() const { return *m_indexFunctionSelectedByCursor; }
   virtual void selectFunctionWithCursor(int functionIndex);
   virtual double defaultCursorAbscissa();
-  virtual StorageFunctionStore * functionStore() const;
+  virtual FunctionStore * functionStore() const;
 
 private:
   constexpr static float k_viewHeight = 174.0f; // TODO Taken from Regresssion/graph_controller. Maybe we should compute and/or put in common ?
 
-  virtual StorageFunctionGraphView * functionGraphView() = 0;
+  virtual FunctionGraphView * functionGraphView() = 0;
   virtual View * cursorView() = 0;
-  virtual StorageFunctionCurveParameterController * curveParameterController() = 0;
+  virtual FunctionCurveParameterController * curveParameterController() = 0;
 
   // InteractiveCurveViewController
   /* When y auto is ticked, we use a display margin to be ensure that the user
diff --git a/apps/shared/storage_function_graph_view.cpp b/apps/shared/storage_function_graph_view.cpp
index 91e0fe8cd..045809587 100644
--- a/apps/shared/storage_function_graph_view.cpp
+++ b/apps/shared/storage_function_graph_view.cpp
@@ -6,7 +6,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageFunctionGraphView::StorageFunctionGraphView(InteractiveCurveViewRange * graphRange,
+FunctionGraphView::FunctionGraphView(InteractiveCurveViewRange * graphRange,
   CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
   CurveView(graphRange, cursor, bannerView, cursorView),
   m_selectedRecord(),
@@ -19,29 +19,29 @@ StorageFunctionGraphView::StorageFunctionGraphView(InteractiveCurveViewRange * g
 {
 }
 
-void StorageFunctionGraphView::drawRect(KDContext * ctx, KDRect rect) const {
+void FunctionGraphView::drawRect(KDContext * ctx, KDRect rect) const {
   ctx->fillRect(rect, KDColorWhite);
   drawGrid(ctx, rect);
   drawAxes(ctx, rect);
   simpleDrawBothAxesLabels(ctx, rect);
 }
 
-void StorageFunctionGraphView::setContext(Context * context) {
+void FunctionGraphView::setContext(Context * context) {
   m_context = context;
 }
 
-Context * StorageFunctionGraphView::context() const {
+Context * FunctionGraphView::context() const {
   return m_context;
 }
 
-void StorageFunctionGraphView::selectRecord(Ion::Storage::Record record) {
+void FunctionGraphView::selectRecord(Ion::Storage::Record record) {
   if (m_selectedRecord != record) {
     m_selectedRecord = record;
     reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
   }
 }
 
-void StorageFunctionGraphView::setAreaHighlight(float start, float end) {
+void FunctionGraphView::setAreaHighlight(float start, float end) {
   if (m_highlightedStart != start || m_highlightedEnd != end) {
     float dirtyStart = start > m_highlightedStart ? m_highlightedStart : start;
     float dirtyEnd = start > m_highlightedStart ? start : m_highlightedStart;
@@ -60,18 +60,18 @@ void StorageFunctionGraphView::setAreaHighlight(float start, float end) {
   }
 }
 
-void StorageFunctionGraphView::setAreaHighlightColor(bool highlightColor) {
+void FunctionGraphView::setAreaHighlightColor(bool highlightColor) {
   if (m_shouldColorHighlighted != highlightColor) {
     reloadBetweenBounds(m_highlightedStart, m_highlightedEnd);
     m_shouldColorHighlighted = highlightColor;
   }
 }
 
-char * StorageFunctionGraphView::label(Axis axis, int index) const {
+char * FunctionGraphView::label(Axis axis, int index) const {
   return (axis == Axis::Horizontal ? (char *)m_xLabels[index] : (char *)m_yLabels[index]);
 }
 
-void StorageFunctionGraphView::reloadBetweenBounds(float start, float end) {
+void FunctionGraphView::reloadBetweenBounds(float start, float end) {
   if (start == end) {
     return;
   }
diff --git a/apps/shared/storage_function_graph_view.h b/apps/shared/storage_function_graph_view.h
index 97b5f6990..fb2986443 100644
--- a/apps/shared/storage_function_graph_view.h
+++ b/apps/shared/storage_function_graph_view.h
@@ -3,15 +3,15 @@
 
 #include <escher.h>
 #include "curve_view.h"
-#include "storage_function.h"
+#include "function.h"
 #include "../constant.h"
 #include "interactive_curve_view_range.h"
 
 namespace Shared {
 
-class StorageFunctionGraphView : public CurveView {
+class FunctionGraphView : public CurveView {
 public:
-  StorageFunctionGraphView(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor,
+  FunctionGraphView(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor,
     BannerView * bannerView, View * cursorView);
   void drawRect(KDContext * ctx, KDRect rect) const override;
   void setContext(Poincare::Context * context);
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/storage_function_list_controller.cpp
index e2f379e4e..b0825f2c9 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/storage_function_list_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_function_list_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include "function_expression_cell.h"
 
 namespace Shared {
@@ -7,19 +7,19 @@ namespace Shared {
 static inline int maxInt(int x, int y) { return x > y ? x : y; }
 static inline int minInt(int x, int y) { return x < y ? x : y; }
 
-StorageFunctionListController::StorageFunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
+FunctionListController::FunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
   StorageExpressionModelListController(parentResponder, text),
   ButtonRowDelegate(header, footer),
   m_selectableTableView(this, this, this, this),
   m_emptyCell(),
   m_plotButton(this, I18n::Message::Plot, Invocation([](void * context, void * sender) {
-      StorageFunctionListController * list = (StorageFunctionListController *)context;
+      FunctionListController * list = (FunctionListController *)context;
       TabViewController * tabController = list->tabController();
       tabController->setActiveTab(1);
       return true;
     }, this), KDFont::SmallFont, Palette::PurpleBright),
   m_valuesButton(this, I18n::Message::DisplayValues, Invocation([](void * context, void * sender) {
-      StorageFunctionListController * list = (StorageFunctionListController *)context;
+      FunctionListController * list = (FunctionListController *)context;
       TabViewController * tabController = list->tabController();
       tabController->setActiveTab(2);
       return true;
@@ -38,11 +38,11 @@ StorageFunctionListController::StorageFunctionListController(Responder * parentR
 
 /* TableViewDataSource */
 
-void StorageFunctionListController::viewWillAppear() {
+void FunctionListController::viewWillAppear() {
   computeTitlesColumnWidth();
 }
 
-KDCoordinate StorageFunctionListController::columnWidth(int i) {
+KDCoordinate FunctionListController::columnWidth(int i) {
   switch (i) {
     case 0:
       return m_titlesColumnWidth;
@@ -54,7 +54,7 @@ KDCoordinate StorageFunctionListController::columnWidth(int i) {
   }
 }
 
-KDCoordinate StorageFunctionListController::cumulatedWidthFromIndex(int i) {
+KDCoordinate FunctionListController::cumulatedWidthFromIndex(int i) {
   switch (i) {
     case 0:
       return 0;
@@ -68,7 +68,7 @@ KDCoordinate StorageFunctionListController::cumulatedWidthFromIndex(int i) {
   }
 }
 
-int StorageFunctionListController::indexFromCumulatedWidth(KDCoordinate offsetX) {
+int FunctionListController::indexFromCumulatedWidth(KDCoordinate offsetX) {
   if (offsetX <= m_titlesColumnWidth) {
     return 0;
   } else {
@@ -80,14 +80,14 @@ int StorageFunctionListController::indexFromCumulatedWidth(KDCoordinate offsetX)
   }
 }
 
-int StorageFunctionListController::typeAtLocation(int i, int j) {
+int FunctionListController::typeAtLocation(int i, int j) {
   if (isAddEmptyRow(j)){
     return i + 2;
   }
   return i;
 }
 
-HighlightCell * StorageFunctionListController::reusableCell(int index, int type) {
+HighlightCell * FunctionListController::reusableCell(int index, int type) {
   assert(index >= 0);
   assert(index < maxNumberOfDisplayableRows());
   switch (type) {
@@ -105,14 +105,14 @@ HighlightCell * StorageFunctionListController::reusableCell(int index, int type)
   }
 }
 
-int StorageFunctionListController::reusableCellCount(int type) {
+int FunctionListController::reusableCellCount(int type) {
   if (type > 1) {
     return 1;
   }
   return maxNumberOfDisplayableRows();
 }
 
-void StorageFunctionListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
+void FunctionListController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
   if (!isAddEmptyRow(j)) {
     if (i == 0) {
       willDisplayTitleCellAtIndex(cell, j);
@@ -128,14 +128,14 @@ void StorageFunctionListController::willDisplayCellAtLocation(HighlightCell * ce
 
 /* ButtonRowDelegate */
 
-int StorageFunctionListController::numberOfButtons(ButtonRowController::Position position) const {
+int FunctionListController::numberOfButtons(ButtonRowController::Position position) const {
   if (position == ButtonRowController::Position::Bottom) {
     return 2;
   }
   return 0;
 }
 
-Button * StorageFunctionListController::buttonAtIndex(int index, ButtonRowController::Position position) const {
+Button * FunctionListController::buttonAtIndex(int index, ButtonRowController::Position position) const {
   if (position == ButtonRowController::Position::Top) {
     return nullptr;
   }
@@ -145,7 +145,7 @@ Button * StorageFunctionListController::buttonAtIndex(int index, ButtonRowContro
 
 /* Responder */
 
-void StorageFunctionListController::didBecomeFirstResponder() {
+void FunctionListController::didBecomeFirstResponder() {
   if (selectedRow() == -1) {
     selectCellAtLocation(1, 0);
   } else {
@@ -158,7 +158,7 @@ void StorageFunctionListController::didBecomeFirstResponder() {
   app()->setFirstResponder(selectableTableView());
 }
 
-bool StorageFunctionListController::handleEvent(Ion::Events::Event event) {
+bool FunctionListController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Up) {
     if (selectedRow() == -1) {
       footer()->setSelectedButton(-1);
@@ -202,11 +202,11 @@ bool StorageFunctionListController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-void StorageFunctionListController::didEnterResponderChain(Responder * previousFirstResponder) {
+void FunctionListController::didEnterResponderChain(Responder * previousFirstResponder) {
   selectableTableView()->reloadData();
 }
 
-void StorageFunctionListController::willExitResponderChain(Responder * nextFirstResponder) {
+void FunctionListController::willExitResponderChain(Responder * nextFirstResponder) {
   if (nextFirstResponder == tabController()) {
     selectableTableView()->deselectTable();
     footer()->setSelectedButton(-1);
@@ -215,7 +215,7 @@ void StorageFunctionListController::willExitResponderChain(Responder * nextFirst
 
 /* SelectableTableViewDelegate */
 
-void StorageFunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   // Update memoization of cell heights
   StorageExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY);
   // Do not select the cell left of the "addEmptyFunction" cell
@@ -226,40 +226,40 @@ void StorageFunctionListController::tableViewDidChangeSelection(SelectableTableV
 
 /* ExpressionModelListController */
 
-StackViewController * StorageFunctionListController::stackController() const {
+StackViewController * FunctionListController::stackController() const {
   return static_cast<StackViewController *>(parentResponder()->parentResponder()->parentResponder());
 }
 
-void StorageFunctionListController::configureFunction(Ion::Storage::Record record) {
+void FunctionListController::configureFunction(Ion::Storage::Record record) {
   StackViewController * stack = stackController();
   parameterController()->setRecord(record);
   stack->push(parameterController());
 }
 
-void StorageFunctionListController::computeTitlesColumnWidth(bool forceMax) {
+void FunctionListController::computeTitlesColumnWidth(bool forceMax) {
   if (forceMax) {
-    m_titlesColumnWidth = nameWidth(StorageFunction::k_maxNameWithArgumentSize - 1)+k_functionTitleSumOfMargins;
+    m_titlesColumnWidth = nameWidth(Function::k_maxNameWithArgumentSize - 1)+k_functionTitleSumOfMargins;
     return;
   }
   KDCoordinate maxTitleWidth = maxFunctionNameWidth()+k_functionTitleSumOfMargins;
   m_titlesColumnWidth = maxInt(maxTitleWidth, k_minTitleColumnWidth);
 }
 
-TabViewController * StorageFunctionListController::tabController() const {
+TabViewController * FunctionListController::tabController() const {
   return static_cast<TabViewController *>(parentResponder()->parentResponder()->parentResponder()->parentResponder());
 }
 
-StorageFunctionStore * StorageFunctionListController::modelStore() {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+FunctionStore * FunctionListController::modelStore() {
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   return myApp->functionStore();
 }
 
-InputViewController * StorageFunctionListController::inputController() {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+InputViewController * FunctionListController::inputController() {
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   return myApp->inputViewController();
 }
 
-KDCoordinate StorageFunctionListController::maxFunctionNameWidth() {
+KDCoordinate FunctionListController::maxFunctionNameWidth() {
   int maxNameLength = 0;
   int numberOfModels = modelStore()->numberOfModels();
   for (int i = 0; i < numberOfModels; i++) {
@@ -269,15 +269,15 @@ KDCoordinate StorageFunctionListController::maxFunctionNameWidth() {
     assert(dotPosition != nullptr);
     maxNameLength = maxInt(maxNameLength, dotPosition-functionName);
   }
-  return nameWidth(maxNameLength + StorageFunction::k_parenthesedArgumentLength);
+  return nameWidth(maxNameLength + Function::k_parenthesedArgumentLength);
 }
 
-void StorageFunctionListController::didChangeModelsList() {
+void FunctionListController::didChangeModelsList() {
   StorageExpressionModelListController::didChangeModelsList();
   computeTitlesColumnWidth();
 }
 
-KDCoordinate StorageFunctionListController::baseline(int j) {
+KDCoordinate FunctionListController::baseline(int j) {
   if (j < 0) {
     return -1;
   }
@@ -293,13 +293,13 @@ KDCoordinate StorageFunctionListController::baseline(int j) {
   return privateBaseline(j);
 }
 
-void StorageFunctionListController::resetMemoizationForIndex(int index) {
+void FunctionListController::resetMemoizationForIndex(int index) {
   assert(index >= 0 && index < k_memoizedCellsCount);
   m_memoizedCellBaseline[index] = -1;
   StorageExpressionModelListController::resetMemoizationForIndex(index);
 }
 
-void StorageFunctionListController::shiftMemoization(bool newCellIsUnder) {
+void FunctionListController::shiftMemoization(bool newCellIsUnder) {
   if (newCellIsUnder) {
     for (int i = 0; i < k_memoizedCellsCount - 1; i++) {
       m_memoizedCellBaseline[i] = m_memoizedCellBaseline[i+1];
@@ -312,19 +312,19 @@ void StorageFunctionListController::shiftMemoization(bool newCellIsUnder) {
   StorageExpressionModelListController::shiftMemoization(newCellIsUnder);
 }
 
-KDCoordinate StorageFunctionListController::nameWidth(int nameLength) const {
+KDCoordinate FunctionListController::nameWidth(int nameLength) const {
   assert(nameLength >= 0);
-  return nameLength * const_cast<StorageFunctionListController *>(this)->titleCells(0)->font()->glyphSize().width();
+  return nameLength * const_cast<FunctionListController *>(this)->titleCells(0)->font()->glyphSize().width();
 }
 
-KDCoordinate StorageFunctionListController::privateBaseline(int j) const {
-  assert(j >= 0 && j < const_cast<StorageFunctionListController *>(this)->numberOfExpressionRows());
+KDCoordinate FunctionListController::privateBaseline(int j) const {
+  assert(j >= 0 && j < const_cast<FunctionListController *>(this)->numberOfExpressionRows());
   FunctionExpressionCell * cell = static_cast<Shared::FunctionExpressionCell *>((const_cast<SelectableTableView *>(&m_selectableTableView))->cellAtLocation(1, j));
   Poincare::Layout layout = cell->layout();
   if (layout.isUninitialized()) {
     return -1; // Baseline < 0 triggers default behaviour (centered alignment)
   }
-  return 0.5*(const_cast<StorageFunctionListController *>(this)->rowHeight(j)-layout.layoutSize().height())+layout.baseline();
+  return 0.5*(const_cast<FunctionListController *>(this)->rowHeight(j)-layout.layoutSize().height())+layout.baseline();
 }
 
 }
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/storage_function_list_controller.h
index 3f57a1d96..9e77869e7 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/storage_function_list_controller.h
@@ -10,9 +10,9 @@
 
 namespace Shared {
 
-class StorageFunctionListController : public StorageExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource {
+class FunctionListController : public StorageExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource {
 public:
-  StorageFunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text);
+  FunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text);
 
   /* ViewController */
   void viewWillAppear() override;
@@ -53,7 +53,7 @@ protected:
   StackViewController * stackController() const;
   void configureFunction(Ion::Storage::Record record);
   void computeTitlesColumnWidth(bool forceMax = false);
-  StorageFunctionStore * modelStore() override;
+  FunctionStore * modelStore() override;
   KDCoordinate baseline(int j);
   void resetMemoizationForIndex(int index) override;
   void shiftMemoization(bool newCellIsUnder) override;
diff --git a/apps/shared/storage_function_store.cpp b/apps/shared/storage_function_store.cpp
index 37c18a45e..143767c2e 100644
--- a/apps/shared/storage_function_store.cpp
+++ b/apps/shared/storage_function_store.cpp
@@ -1,10 +1,10 @@
 #include "storage_function_store.h"
-#include "storage_cartesian_function.h"
+#include "cartesian_function.h"
 #include <assert.h>
 
 namespace Shared {
 
-uint32_t StorageFunctionStore::storeChecksum() {
+uint32_t FunctionStore::storeChecksum() {
   return Ion::Storage::sharedStorage()->checksum();
 }
 
diff --git a/apps/shared/storage_function_store.h b/apps/shared/storage_function_store.h
index 7195a48a8..f5f15ff05 100644
--- a/apps/shared/storage_function_store.h
+++ b/apps/shared/storage_function_store.h
@@ -1,7 +1,7 @@
 #ifndef SHARED_STORAGE_FUNCTION_STORE_H
 #define SHARED_STORAGE_FUNCTION_STORE_H
 
-#include "storage_function.h"
+#include "function.h"
 #include "storage_expression_model_store.h"
 #include <stdint.h>
 
@@ -9,15 +9,15 @@ namespace Shared {
 
 /* FunctionStore storse functions and gives them a color. */
 
-class StorageFunctionStore : public StorageExpressionModelStore {
+class FunctionStore : public StorageExpressionModelStore {
 public:
-  StorageFunctionStore() : StorageExpressionModelStore() {}
+  FunctionStore() : StorageExpressionModelStore() {}
   uint32_t storeChecksum();
   // An active function must be defined to be counted
-  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](SingleExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
-  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](SingleExpressionModelHandle * m) { return m->isDefined() && static_cast<StorageFunction *>(m)->isActive(); }); }
+  int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined() && static_cast<Function *>(m)->isActive(); }); }
+  Ion::Storage::Record activeRecordAtIndex(int i) const { return recordStatifyingTestAtIndex(i, [](ExpressionModelHandle * m) { return m->isDefined() && static_cast<Function *>(m)->isActive(); }); }
 
-  ExpiringPointer<StorageFunction> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<StorageFunction>(static_cast<StorageFunction *>(privateModelForRecord(record))); }
+  ExpiringPointer<Function> modelForRecord(Ion::Storage::Record record) const { return ExpiringPointer<Function>(static_cast<Function *>(privateModelForRecord(record))); }
 
 };
 
diff --git a/apps/shared/storage_list_parameter_controller.cpp b/apps/shared/storage_list_parameter_controller.cpp
index b518db47e..f2b3eeda7 100644
--- a/apps/shared/storage_list_parameter_controller.cpp
+++ b/apps/shared/storage_list_parameter_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_list_parameter_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include <assert.h>
 
 namespace Shared {
@@ -94,12 +94,12 @@ bool StorageListParameterController::handleEnterOnRow(int rowIndex) {
   }
 }
 
-ExpiringPointer<StorageFunction> StorageListParameterController::function() {
+ExpiringPointer<Function> StorageListParameterController::function() {
   return functionStore()->modelForRecord(m_record);
 }
 
-StorageFunctionStore * StorageListParameterController::functionStore() {
-  StorageFunctionApp * a = static_cast<StorageFunctionApp *>(app());
+FunctionStore * StorageListParameterController::functionStore() {
+  FunctionApp * a = static_cast<FunctionApp *>(app());
   return a->functionStore();
 }
 
diff --git a/apps/shared/storage_list_parameter_controller.h b/apps/shared/storage_list_parameter_controller.h
index 88e61fb73..f039db41b 100644
--- a/apps/shared/storage_list_parameter_controller.h
+++ b/apps/shared/storage_list_parameter_controller.h
@@ -31,8 +31,8 @@ protected:
     return 2;
 #endif
   }
-  StorageFunctionStore * functionStore();
-  ExpiringPointer<StorageFunction> function();
+  FunctionStore * functionStore();
+  ExpiringPointer<Function> function();
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
 private:
diff --git a/apps/shared/storage_sum_graph_controller.cpp b/apps/shared/storage_sum_graph_controller.cpp
index 0d05cb93d..e0b92e3e9 100644
--- a/apps/shared/storage_sum_graph_controller.cpp
+++ b/apps/shared/storage_sum_graph_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_sum_graph_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include "../apps_container.h"
 #include <poincare_layouts.h>
 #include <poincare/layout_helper.h>
@@ -13,7 +13,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageSumGraphController::StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
+StorageSumGraphController::StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
   SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
   m_step(Step::FirstParameter),
   m_startSum(NAN),
@@ -101,9 +101,9 @@ bool StorageSumGraphController::handleEvent(Ion::Events::Event event) {
 }
 
 bool StorageSumGraphController::moveCursorHorizontallyToPosition(double x) {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   assert(!m_record.isNull());
-  ExpiringPointer<StorageFunction> function = myApp->functionStore()->modelForRecord(m_record);
+  ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
   double y = function->evaluateAtAbscissa(x, myApp->localContext());
   m_cursor->moveTo(x, y);
   if (m_step == Step::FirstParameter) {
@@ -189,9 +189,9 @@ bool StorageSumGraphController::handleEnter() {
     return true;
   }
   m_step = (Step)((int)m_step+1);
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   assert(!m_record.isNull());
-  ExpiringPointer<StorageFunction> function = myApp->functionStore()->modelForRecord(m_record);
+  ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
   double sum = function->sumBetweenBounds(m_startSum, m_endSum, myApp->localContext());
   m_legendView.setSumSymbol(m_step, m_startSum, m_endSum, sum, createFunctionLayout(function));
   m_legendView.setLegendMessage(I18n::Message::Default, m_step);
diff --git a/apps/shared/storage_sum_graph_controller.h b/apps/shared/storage_sum_graph_controller.h
index 7b9aceecc..f8224b127 100644
--- a/apps/shared/storage_sum_graph_controller.h
+++ b/apps/shared/storage_sum_graph_controller.h
@@ -7,7 +7,7 @@
 #include "vertical_cursor_view.h"
 #include "curve_view_cursor.h"
 #include "simple_interactive_curve_view_controller.h"
-#include "storage_function.h"
+#include "function.h"
 #include "text_field_delegate.h"
 #include "expiring_pointer.h"
 
@@ -15,7 +15,7 @@ namespace Shared {
 
 class StorageSumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
 public:
-  StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageFunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
+  StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
   void viewWillAppear() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
   bool handleEvent(Ion::Events::Event event) override;
@@ -40,7 +40,7 @@ private:
   constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
   virtual I18n::Message legendMessageAtStep(Step step) = 0;
   virtual double cursorNextStep(double position, int direction) = 0;
-  virtual Poincare::Layout createFunctionLayout(ExpiringPointer<StorageFunction> function) = 0;
+  virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;
   Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
   Shared::CurveView * curveView() override { return m_graphView; }
   TextFieldDelegateApp * textFieldDelegateApp() override {
@@ -78,7 +78,7 @@ private:
     char m_draftText[TextField::maxBufferSize()];
     CodePoint m_sumSymbol;
   };
-  StorageFunctionGraphView * m_graphView;
+  FunctionGraphView * m_graphView;
   LegendView m_legendView;
   VerticalCursorView m_cursorView;
 };
diff --git a/apps/shared/storage_values_controller.cpp b/apps/shared/storage_values_controller.cpp
index d8946031d..7ab7f2839 100644
--- a/apps/shared/storage_values_controller.cpp
+++ b/apps/shared/storage_values_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_values_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include "../constant.h"
 #include "../apps_container.h"
 #include "poincare_helpers.h"
@@ -309,7 +309,7 @@ int StorageValuesController::maxNumberOfElements() const {
 }
 
 double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
-  ExpiringPointer<StorageFunction> function = functionStore()->modelForRecord(recordAtColumn(columnIndex));
+  ExpiringPointer<Function> function = functionStore()->modelForRecord(recordAtColumn(columnIndex));
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   return function->evaluateAtAbscissa(abscissa, myApp->localContext());
 }
@@ -318,8 +318,8 @@ void StorageValuesController::updateNumberOfColumns() {
   m_numberOfColumns = 1+functionStore()->numberOfActiveFunctions();
 }
 
-StorageFunctionStore * StorageValuesController::functionStore() const {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
+FunctionStore * StorageValuesController::functionStore() const {
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
   return myApp->functionStore();
 }
 
diff --git a/apps/shared/storage_values_controller.h b/apps/shared/storage_values_controller.h
index 0e5219a86..7c2c6b1a4 100644
--- a/apps/shared/storage_values_controller.h
+++ b/apps/shared/storage_values_controller.h
@@ -46,7 +46,7 @@ protected:
   StackViewController * stackController() const;
   bool setDataAtLocation(double floatBody, int columnIndex, int rowIndex) override;
   virtual void updateNumberOfColumns();
-  virtual StorageFunctionStore * functionStore() const;
+  virtual FunctionStore * functionStore() const;
   virtual Ion::Storage::Record recordAtColumn(int i);
   Interval * m_interval;
   int m_numberOfColumns;
diff --git a/apps/shared/storage_values_function_parameter_controller.cpp b/apps/shared/storage_values_function_parameter_controller.cpp
index c457e23e9..3047e49b4 100644
--- a/apps/shared/storage_values_function_parameter_controller.cpp
+++ b/apps/shared/storage_values_function_parameter_controller.cpp
@@ -1,5 +1,5 @@
 #include "storage_values_function_parameter_controller.h"
-#include "storage_function_app.h"
+#include "function_app.h"
 #include <assert.h>
 
 namespace Shared {
@@ -9,8 +9,8 @@ const char * StorageValuesFunctionParameterController::title() {
 }
 
 void StorageValuesFunctionParameterController::viewWillAppear() {
-  StorageFunctionApp * myApp = static_cast<StorageFunctionApp *>(app());
-  myApp->functionStore()->modelForRecord(m_record)->nameWithArgument(m_pageTitle, StorageFunction::k_maxNameWithArgumentSize, m_symbol);
+  FunctionApp * myApp = static_cast<FunctionApp *>(app());
+  myApp->functionStore()->modelForRecord(m_record)->nameWithArgument(m_pageTitle, Function::k_maxNameWithArgumentSize, m_symbol);
 }
 
 void StorageValuesFunctionParameterController::didBecomeFirstResponder() {
diff --git a/apps/shared/storage_values_function_parameter_controller.h b/apps/shared/storage_values_function_parameter_controller.h
index 6d2a4b376..d9a1dcd3f 100644
--- a/apps/shared/storage_values_function_parameter_controller.h
+++ b/apps/shared/storage_values_function_parameter_controller.h
@@ -2,7 +2,7 @@
 #define SHARED_STORAGE_VALUES_FUNCTION_PARAM_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function.h"
+#include "function.h"
 #include <apps/i18n.h>
 
 namespace Shared {
@@ -34,7 +34,7 @@ protected:
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
 private:
-  char m_pageTitle[StorageFunction::k_maxNameWithArgumentSize];
+  char m_pageTitle[Function::k_maxNameWithArgumentSize];
   char m_symbol;
 };
 
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 52041e04e..20ed34a41 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -13,7 +13,7 @@ using namespace Shared;
 namespace Solver {
 
 Equation::Equation(Ion::Storage::Record record) :
-  SingleExpressionModelHandle(record)
+  ExpressionModelHandle(record)
 {
 }
 
@@ -45,7 +45,7 @@ Expression Equation::Handle::standardForm(const Storage::Record * record, Contex
 }
 
 void Equation::Handle::tidy() const {
-  ExpressionModelHandle::tidy();
+  ExpressionModel::tidy();
   // Free the pool of the m_standardForm
   m_standardForm = Expression();
 }
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index 65bda4052..d112d2a3d 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -1,11 +1,11 @@
 #ifndef SOLVER_EQUATION_h
 #define SOLVER_EQUATION_h
 
-#include "../shared/single_expression_model_handle.h"
+#include "../shared/expression_model_handle.h"
 
 namespace Solver {
 
-class Equation : public Shared::SingleExpressionModelHandle {
+class Equation : public Shared::ExpressionModelHandle {
 public:
   Equation(Ion::Storage::Record record = Record());
   bool shouldBeClearedBeforeRemove() override {
@@ -15,7 +15,7 @@ public:
   bool containsIComplex(Poincare::Context * context) const;
 
 private:
-  class Handle : public Shared::ExpressionModelHandle {
+  class Handle : public Shared::ExpressionModel {
   public:
     Poincare::Expression standardForm(const Ion::Storage::Record * record, Poincare::Context * context) const;
     void tidy() const override;
@@ -25,7 +25,7 @@ private:
     mutable Poincare::Expression m_standardForm;
   };
   size_t metaDataSize() const override { return 0; }
-  const Shared::ExpressionModelHandle * handle() const override { return &m_handle; }
+  const Shared::ExpressionModel * handle() const override { return &m_handle; }
   Handle m_handle;
 };
 
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index be1491cf5..ab65d8497 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -49,7 +49,7 @@ void EquationStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record
   m_equations[cacheIndex] = Equation(record);
 }
 
-SingleExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) const {
+ExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_equations[cacheIndex];
 }
diff --git a/apps/solver/equation_store.h b/apps/solver/equation_store.h
index 835da0ec2..a667fc5a8 100644
--- a/apps/solver/equation_store.h
+++ b/apps/solver/equation_store.h
@@ -82,7 +82,7 @@ private:
   /* We don't really use model memoization as the number of Equation is limited
    * and we keep enough Equations to store them all. */
   void setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const override;
-  Shared::SingleExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
+  Shared::ExpressionModelHandle * memoizedModelAtIndex(int cacheIndex) const override;
 
   Error resolveLinearSystem(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression coefficients[k_maxNumberOfEquations][Poincare::Expression::k_maxNumberOfVariables], Poincare::Expression constants[k_maxNumberOfEquations], Poincare::Context * context);
   Error oneDimensialPolynomialSolve(Poincare::Expression solutions[k_maxNumberOfExactSolutions], Poincare::Expression solutionApproximations[k_maxNumberOfExactSolutions], Poincare::Expression polynomialCoefficients[Poincare::Expression::k_maxNumberOfPolynomialCoefficients], int degree, Poincare::Context * context);
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 086947b52..5f05e6a8e 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -1,8 +1,8 @@
 #include "variable_box_controller.h"
 #include "shared/global_context.h"
 #include "shared/poincare_helpers.h"
-#include "shared/storage_function.h"
-#include "shared/storage_cartesian_function.h"
+#include "shared/function.h"
+#include "shared/cartesian_function.h"
 #include "graph/storage_cartesian_function_store.h"
 #include "constant.h"
 #include <escher/metric.h>
@@ -103,18 +103,18 @@ void VariableBoxController::willDisplayCellForIndex(HighlightCell * cell, int in
   }
   ExpressionTableCellWithExpression * myCell = (ExpressionTableCellWithExpression *)cell;
   Storage::Record record = recordAtIndex(index);
-  assert(Shared::StorageFunction::k_maxNameWithArgumentSize > SymbolAbstract::k_maxNameSize);
-  char symbolName[Shared::StorageFunction::k_maxNameWithArgumentSize];
+  assert(Shared::Function::k_maxNameWithArgumentSize > SymbolAbstract::k_maxNameSize);
+  char symbolName[Shared::Function::k_maxNameWithArgumentSize];
   size_t symbolLength = 0;
   if (m_currentPage == Page::Expression) {
     symbolLength = SymbolAbstract::TruncateExtension(symbolName, record.fullName(), SymbolAbstract::k_maxNameSize);
   } else {
     assert(m_currentPage == Page::Function);
-    StorageCartesianFunction f(record);
+    CartesianFunction f(record);
     symbolLength = f.nameWithArgument(
         symbolName,
-        Shared::StorageFunction::k_maxNameWithArgumentSize,
-        Shared::StorageCartesianFunction::Symbol());
+        Shared::Function::k_maxNameWithArgumentSize,
+        Shared::CartesianFunction::Symbol());
   }
   Layout symbolLayout = LayoutHelper::String(symbolName, symbolLength);
   myCell->setLayout(symbolLayout);
@@ -191,9 +191,9 @@ bool VariableBoxController::selectLeaf(int selectedRow) {
 
   // Get the name text to insert
   Storage::Record record = recordAtIndex(selectedRow);
-  assert(Shared::StorageFunction::k_maxNameWithArgumentSize > 0);
-  assert(Shared::StorageFunction::k_maxNameWithArgumentSize > SymbolAbstract::k_maxNameSize);
-  constexpr size_t nameToHandleMaxSize = Shared::StorageFunction::k_maxNameWithArgumentSize;
+  assert(Shared::Function::k_maxNameWithArgumentSize > 0);
+  assert(Shared::Function::k_maxNameWithArgumentSize > SymbolAbstract::k_maxNameSize);
+  constexpr size_t nameToHandleMaxSize = Shared::Function::k_maxNameWithArgumentSize;
   char nameToHandle[nameToHandleMaxSize];
   size_t nameLength = SymbolAbstract::TruncateExtension(nameToHandle, record.fullName(), nameToHandleMaxSize);
 

From 5a5a18108648b0626c2d092ba0fa342371393d26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 11 Mar 2019 18:11:03 +0100
Subject: [PATCH 128/295] [apps/shared] Change names:
 Sequence::DefinitionHandle --> Sequence::DefinitionModel
 Sequence::FirstInitialConditionHandle -->
 Sequence::FirstInitialConditionModel Equation::Handle--> Equation::Model

---
 apps/sequence/sequence.cpp            | 40 +++++++++++------------
 apps/sequence/sequence.h              | 46 +++++++++++++--------------
 apps/shared/cartesian_function.h      |  4 +--
 apps/shared/expression_model_handle.h | 20 ++++++------
 apps/solver/equation.cpp              |  8 ++---
 apps/solver/equation.h                |  8 ++---
 6 files changed, 63 insertions(+), 63 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 9ef1b7cb1..82b1a2d1c 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -15,12 +15,12 @@ using namespace Poincare;
 namespace Sequence {
 
 void Sequence::tidy() {
-  m_definitionHandle.tidyName();
+  m_definition.tidyName();
   Function::tidy(); // m_definitionName.tidy()
-  m_firstInitialConditionHandle.tidy();
-  m_firstInitialConditionHandle.tidyName();
-  m_secondInitialConditionHandle.tidy();
-  m_secondInitialConditionHandle.tidyName();
+  m_firstInitialCondition.tidy();
+  m_firstInitialCondition.tidyName();
+  m_secondInitialCondition.tidy();
+  m_secondInitialCondition.tidyName();
   m_nameLayout = Layout();
 }
 
@@ -69,8 +69,8 @@ void Sequence::setType(Type t) {
 
 void Sequence::setInitialRank(int rank) {
   recordData()->setInitialRank(rank);
-  m_firstInitialConditionHandle.tidyName();
-  m_secondInitialConditionHandle.tidyName();
+  m_firstInitialCondition.tidyName();
+  m_secondInitialCondition.tidyName();
 }
 
 Poincare::Layout Sequence::nameLayout() {
@@ -193,14 +193,14 @@ Sequence::SequenceRecordData * Sequence::recordData() const {
 
 /* Sequence Handle */
 
-Poincare::Layout Sequence::SequenceHandle::name(Sequence * sequence) {
+Poincare::Layout Sequence::SequenceModel::name(Sequence * sequence) {
   if (m_name.isUninitialized()) {
     buildName(sequence);
   }
   return m_name;
 }
 
-void Sequence::SequenceHandle::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t newExpressionSize, size_t previousExpressionSize) {
+void Sequence::SequenceModel::updateNewDataWithExpression(Ion::Storage::Record * record, Expression & expressionToStore, void * expressionAddress, size_t newExpressionSize, size_t previousExpressionSize) {
   Ion::Storage::Record::Data newData = record->value();
   // Translate expressions located downstream
   size_t sizeBeforeExpression = (char *)expressionAddress -(char *)newData.buffer;
@@ -216,17 +216,17 @@ void Sequence::SequenceHandle::updateNewDataWithExpression(Ion::Storage::Record
 
 /* Definition Handle*/
 
-void * Sequence::DefinitionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+void * Sequence::DefinitionModel::expressionAddress(const Ion::Storage::Record * record) const {
   return (char *)record->value().buffer+sizeof(SequenceRecordData);
 }
 
-size_t Sequence::DefinitionHandle::expressionSize(const Ion::Storage::Record * record) const {
+size_t Sequence::DefinitionModel::expressionSize(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
   SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
   return data.size-sizeof(SequenceRecordData) - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
 }
 
-void Sequence::DefinitionHandle::buildName(Sequence * sequence) {
+void Sequence::DefinitionModel::buildName(Sequence * sequence) {
   char name = sequence->fullName()[0];
   if (sequence->type() == Type::Explicit) {
     m_name = HorizontalLayout::Builder(
@@ -246,22 +246,22 @@ void Sequence::DefinitionHandle::buildName(Sequence * sequence) {
 
 /* First Initial Condition Handle*/
 
-void * Sequence::FirstInitialConditionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+void * Sequence::FirstInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
   SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
   size_t offset = data.size - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
   return (char *)data.buffer+offset;
 }
 
-size_t Sequence::FirstInitialConditionHandle::expressionSize(const Ion::Storage::Record * record) const {
+size_t Sequence::FirstInitialConditionModel::expressionSize(const Ion::Storage::Record * record) const {
   return static_cast<const Sequence *>(record)->recordData()->firstInitialConditionSize();
 }
 
-void Sequence::FirstInitialConditionHandle::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
+void Sequence::FirstInitialConditionModel::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
   static_cast<const Sequence *>(record)->recordData()->setFirstInitialConditionSize(newSize);
 }
 
-void Sequence::FirstInitialConditionHandle::buildName(Sequence * sequence) {
+void Sequence::FirstInitialConditionModel::buildName(Sequence * sequence) {
   assert(sequence->type() == Type::SingleRecurrence || sequence->type() == Type::DoubleRecurrence);
   char buffer[k_initialRankNumberOfDigits+1];
   Integer(sequence->initialRank()).serialize(buffer, k_initialRankNumberOfDigits+1);
@@ -273,22 +273,22 @@ void Sequence::FirstInitialConditionHandle::buildName(Sequence * sequence) {
 
 /* Second Initial Condition Handle*/
 
-void * Sequence::SecondInitialConditionHandle::expressionAddress(const Ion::Storage::Record * record) const {
+void * Sequence::SecondInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
   SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
   size_t offset = data.size - dataBuffer->secondInitialConditionSize();
   return (char *)data.buffer+offset;
 }
 
-void Sequence::SecondInitialConditionHandle::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
+void Sequence::SecondInitialConditionModel::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
   static_cast<const Sequence *>(record)->recordData()->setSecondInitialConditionSize(newSize);
 }
 
-size_t Sequence::SecondInitialConditionHandle::expressionSize(const Ion::Storage::Record * record) const {
+size_t Sequence::SecondInitialConditionModel::expressionSize(const Ion::Storage::Record * record) const {
   return static_cast<const Sequence *>(record)->recordData()->secondInitialConditionSize();
 }
 
-void Sequence::SecondInitialConditionHandle::buildName(Sequence * sequence) {
+void Sequence::SecondInitialConditionModel::buildName(Sequence * sequence) {
   assert(sequence->type() == Type::DoubleRecurrence);
   char buffer[k_initialRankNumberOfDigits+1];
   Integer(sequence->initialRank()+1).serialize(buffer, k_initialRankNumberOfDigits+1);
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 263c7aa41..ec9708427 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -31,22 +31,22 @@ public:
   void setType(Type type);
   void setInitialRank(int rank);
   // Definition
-  Poincare::Layout definitionName() { return m_definitionHandle.name(this); }
-  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableHandle()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownN); }
+  Poincare::Layout definitionName() { return m_definition.name(this); }
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownN); }
   // First initial condition
-  Poincare::Layout firstInitialConditionName() { return m_firstInitialConditionHandle.name(this); }
-  void firstInitialConditionText(char * buffer, size_t bufferSize) const { return m_firstInitialConditionHandle.text(this, buffer, bufferSize); }
-  Poincare::Expression firstInitialConditionExpressionReduced(Poincare::Context * context) const { return m_firstInitialConditionHandle.expressionReduced(this, context); }
-  Poincare::Expression firstInitialConditionExpressionClone() const { return m_firstInitialConditionHandle.expressionClone(this); }
-  Poincare::Layout firstInitialConditionLayout() { return m_firstInitialConditionHandle.layout(this); }
-  Ion::Storage::Record::ErrorStatus setFirstInitialConditionContent(const char * c) { return m_firstInitialConditionHandle.setContent(this, c); }
+  Poincare::Layout firstInitialConditionName() { return m_firstInitialCondition.name(this); }
+  void firstInitialConditionText(char * buffer, size_t bufferSize) const { return m_firstInitialCondition.text(this, buffer, bufferSize); }
+  Poincare::Expression firstInitialConditionExpressionReduced(Poincare::Context * context) const { return m_firstInitialCondition.expressionReduced(this, context); }
+  Poincare::Expression firstInitialConditionExpressionClone() const { return m_firstInitialCondition.expressionClone(this); }
+  Poincare::Layout firstInitialConditionLayout() { return m_firstInitialCondition.layout(this); }
+  Ion::Storage::Record::ErrorStatus setFirstInitialConditionContent(const char * c) { return m_firstInitialCondition.setContent(this, c); }
   // Second initial condition
-  Poincare::Layout secondInitialConditionName() { return m_secondInitialConditionHandle.name(this); }
-  void secondInitialConditionText(char * buffer, size_t bufferSize) const { return m_secondInitialConditionHandle.text(this, buffer, bufferSize); }
-  Poincare::Expression secondInitialConditionExpressionReduced(Poincare::Context * context) const { return m_secondInitialConditionHandle.expressionReduced(this, context); }
-  Poincare::Expression secondInitialConditionExpressionClone() const { return m_secondInitialConditionHandle.expressionClone(this); }
-  Poincare::Layout secondInitialConditionLayout() { return m_secondInitialConditionHandle.layout(this); }
-  Ion::Storage::Record::ErrorStatus setSecondInitialConditionContent(const char * c) { return m_secondInitialConditionHandle.setContent(this, c); }
+  Poincare::Layout secondInitialConditionName() { return m_secondInitialCondition.name(this); }
+  void secondInitialConditionText(char * buffer, size_t bufferSize) const { return m_secondInitialCondition.text(this, buffer, bufferSize); }
+  Poincare::Expression secondInitialConditionExpressionReduced(Poincare::Context * context) const { return m_secondInitialCondition.expressionReduced(this, context); }
+  Poincare::Expression secondInitialConditionExpressionClone() const { return m_secondInitialCondition.expressionClone(this); }
+  Poincare::Layout secondInitialConditionLayout() { return m_secondInitialCondition.layout(this); }
+  Ion::Storage::Record::ErrorStatus setSecondInitialConditionContent(const char * c) { return m_secondInitialCondition.setContent(this, c); }
 
   // Sequence properties
   int numberOfElements() { return (int)type() + 1; }
@@ -94,9 +94,9 @@ private:
     uint16_t m_secondInitialConditionSize;
   };
 
-  class SequenceHandle : public Shared::ExpressionModel {
+  class SequenceModel : public Shared::ExpressionModel {
   public:
-    SequenceHandle() : Shared::ExpressionModel(), m_name() {}
+    SequenceModel() : Shared::ExpressionModel(), m_name() {}
     void tidyName() { m_name = Poincare::Layout(); }
     virtual Poincare::Layout name(Sequence * sequence);
   protected:
@@ -107,7 +107,7 @@ private:
     virtual void updateMetaData(const Ion::Storage::Record * record, size_t newSize) {}
   };
 
-  class DefinitionHandle : public SequenceHandle {
+  class DefinitionModel : public SequenceModel {
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
@@ -115,7 +115,7 @@ private:
     void buildName(Sequence * sequence) override;
   };
 
-  class FirstInitialConditionHandle : public SequenceHandle {
+  class FirstInitialConditionModel : public SequenceModel {
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
@@ -124,7 +124,7 @@ private:
     void buildName(Sequence * sequence) override;
   };
 
-  class SecondInitialConditionHandle : public SequenceHandle {
+  class SecondInitialConditionModel : public SequenceModel {
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
@@ -135,11 +135,11 @@ private:
 
   template<typename T> T templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const;
   size_t metaDataSize() const override { return sizeof(SequenceRecordData); }
-  const Shared::ExpressionModel * handle() const override { return &m_definitionHandle; }
+  const Shared::ExpressionModel * model() const override { return &m_definition; }
   SequenceRecordData * recordData() const;
-  DefinitionHandle m_definitionHandle;
-  FirstInitialConditionHandle m_firstInitialConditionHandle;
-  SecondInitialConditionHandle m_secondInitialConditionHandle;
+  DefinitionModel m_definition;
+  FirstInitialConditionModel m_firstInitialCondition;
+  SecondInitialConditionModel m_secondInitialCondition;
   Poincare::Layout m_nameLayout;
 };
 
diff --git a/apps/shared/cartesian_function.h b/apps/shared/cartesian_function.h
index dae3a19a3..2b56b8aa5 100644
--- a/apps/shared/cartesian_function.h
+++ b/apps/shared/cartesian_function.h
@@ -15,7 +15,7 @@ public:
   CartesianFunction(Ion::Storage::Record record = Record()) :
     Function(record)
   {}
-  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableHandle()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownX); }
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownX); }
 
   // Derivative
   bool displayDerivative() const;
@@ -52,7 +52,7 @@ private:
     size_t expressionSize(const Ion::Storage::Record * record) const override;
   };
   size_t metaDataSize() const override { return sizeof(CartesianFunctionRecordData); }
-  const ExpressionModel * handle() const override { return &m_model; }
+  const ExpressionModel * model() const override { return &m_model; }
   CartesianFunctionRecordData * recordData() const;
   Model m_model;
 };
diff --git a/apps/shared/expression_model_handle.h b/apps/shared/expression_model_handle.h
index 0dc368cfa..64878a353 100644
--- a/apps/shared/expression_model_handle.h
+++ b/apps/shared/expression_model_handle.h
@@ -12,10 +12,10 @@ public:
   ExpressionModelHandle(Ion::Storage::Record record = Ion::Storage::Record());
 
   // Property
-  void text(char * buffer, size_t bufferSize) const { return handle()->text(this, buffer, bufferSize); }
-  Poincare::Expression expressionReduced(Poincare::Context * context) const { return handle()->expressionReduced(this, context); }
-  Poincare::Expression expressionClone() const { return handle()->expressionClone(this); }
-  Poincare::Layout layout() { return handle()->layout(this); }
+  void text(char * buffer, size_t bufferSize) const { return model()->text(this, buffer, bufferSize); }
+  Poincare::Expression expressionReduced(Poincare::Context * context) const { return model()->expressionReduced(this, context); }
+  Poincare::Expression expressionClone() const { return model()->expressionClone(this); }
+  Poincare::Layout layout() { return model()->layout(this); }
    /* Here, isDefined is the exact contrary of isEmpty. However, for Sequence
    * inheriting from ExpressionModelHandle, isEmpty and isDefined have not exactly
    * opposite meaning. For instance, u(n+1)=u(n) & u(0) = ... is not empty and
@@ -28,13 +28,13 @@ public:
    * ExpressionModel, tidy and tidyExpressionModel trigger the same
    * behaviour but it is not true for its child classes (for example, in
    * Sequence). */
-  virtual void tidy() { handle()->tidy(); }
-  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableHandle()->setContent(this, c); }
-  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableHandle()->setExpressionContent(this, e); }
+  virtual void tidy() { model()->tidy(); }
+  virtual Ion::Storage::Record::ErrorStatus setContent(const char * c) { return editableModel()->setContent(this, c); }
+  Ion::Storage::Record::ErrorStatus setExpressionContent(Poincare::Expression & e) { return editableModel()->setExpressionContent(this, e); }
 protected:
-  bool isCircularlyDefined(Poincare::Context * context) const { return handle()->isCircularlyDefined(this, context); }
-  ExpressionModel * editableHandle() { return const_cast<ExpressionModel *>(handle()); }
-  virtual const ExpressionModel * handle() const = 0;
+  bool isCircularlyDefined(Poincare::Context * context) const { return model()->isCircularlyDefined(this, context); }
+  ExpressionModel * editableModel() { return const_cast<ExpressionModel *>(model()); }
+  virtual const ExpressionModel * model() const = 0;
   virtual size_t metaDataSize() const = 0;
 };
 
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 20ed34a41..583deaf7f 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -21,7 +21,7 @@ bool Equation::containsIComplex(Context * context) const {
   return expressionClone().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
 }
 
-Expression Equation::Handle::standardForm(const Storage::Record * record, Context * context) const {
+Expression Equation::Model::standardForm(const Storage::Record * record, Context * context) const {
   if (m_standardForm.isUninitialized()) {
     const Expression e = expressionReduced(record, context);
     if (e.type() == ExpressionNode::Type::Unreal) {
@@ -44,17 +44,17 @@ Expression Equation::Handle::standardForm(const Storage::Record * record, Contex
   return m_standardForm;
 }
 
-void Equation::Handle::tidy() const {
+void Equation::Model::tidy() const {
   ExpressionModel::tidy();
   // Free the pool of the m_standardForm
   m_standardForm = Expression();
 }
 
-void * Equation::Handle::expressionAddress(const Ion::Storage::Record * record) const {
+void * Equation::Model::expressionAddress(const Ion::Storage::Record * record) const {
   return (char *)record->value().buffer;
 }
 
-size_t Equation::Handle::expressionSize(const Ion::Storage::Record * record) const {
+size_t Equation::Model::expressionSize(const Ion::Storage::Record * record) const {
   return record->value().size;
 }
 
diff --git a/apps/solver/equation.h b/apps/solver/equation.h
index d112d2a3d..5cf5df70f 100644
--- a/apps/solver/equation.h
+++ b/apps/solver/equation.h
@@ -11,11 +11,11 @@ public:
   bool shouldBeClearedBeforeRemove() override {
     return false;
   }
-  Poincare::Expression standardForm(Poincare::Context * context) const { return m_handle.standardForm(this, context); }
+  Poincare::Expression standardForm(Poincare::Context * context) const { return m_model.standardForm(this, context); }
   bool containsIComplex(Poincare::Context * context) const;
 
 private:
-  class Handle : public Shared::ExpressionModel {
+  class Model : public Shared::ExpressionModel {
   public:
     Poincare::Expression standardForm(const Ion::Storage::Record * record, Poincare::Context * context) const;
     void tidy() const override;
@@ -25,8 +25,8 @@ private:
     mutable Poincare::Expression m_standardForm;
   };
   size_t metaDataSize() const override { return 0; }
-  const Shared::ExpressionModel * handle() const override { return &m_handle; }
-  Handle m_handle;
+  const Shared::ExpressionModel * model() const override { return &m_model; }
+  Model m_model;
 };
 
 }

From 578c65d5dd5a4a722a4658e60650762a902f1f2d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 11:41:52 +0100
Subject: [PATCH 129/295] [shared] Clean class names containing storage

---
 apps/graph/Makefile                           | 10 +--
 apps/graph/app.cpp                            |  2 +-
 apps/graph/app.h                              | 16 ++---
 ...store.cpp => cartesian_function_store.cpp} |  8 +--
 ...ion_store.h => cartesian_function_store.h} |  8 +--
 .../graph/calculation_graph_controller.cpp    |  2 +-
 .../graph/calculation_graph_controller.h      |  6 +-
 .../graph/calculation_parameter_controller.h  |  2 +-
 apps/graph/graph/curve_parameter_controller.h |  2 +-
 apps/graph/graph/graph_controller.cpp         |  2 +-
 apps/graph/graph/graph_controller.h           |  8 +--
 apps/graph/graph/graph_controller_helper.cpp  |  2 +-
 apps/graph/graph/graph_controller_helper.h    |  2 +-
 apps/graph/graph/graph_view.cpp               |  2 +-
 apps/graph/graph/graph_view.h                 |  8 +--
 .../graph/graph/integral_graph_controller.cpp |  2 +-
 apps/graph/graph/integral_graph_controller.h  |  4 +-
 .../graph/intersection_graph_controller.h     |  2 +-
 apps/graph/graph/tangent_graph_controller.h   |  4 +-
 ...ist_controller.cpp => list_controller.cpp} | 32 ++++-----
 ...ge_list_controller.h => list_controller.h} | 14 ++--
 apps/graph/list/list_parameter_controller.cpp |  6 +-
 apps/graph/list/list_parameter_controller.h   | 14 ++--
 .../list/text_field_function_title_cell.cpp   |  4 +-
 .../list/text_field_function_title_cell.h     |  4 +-
 ...pp => derivative_parameter_controller.cpp} | 26 +++----
 ...er.h => derivative_parameter_controller.h} | 16 ++---
 ....cpp => function_parameter_controller.cpp} | 10 +--
 ...ller.h => function_parameter_controller.h} | 14 ++--
 ...s_controller.cpp => values_controller.cpp} | 38 +++++-----
 ...alues_controller.h => values_controller.h} | 16 ++---
 .../graph/curve_parameter_controller.h        |  2 +-
 .../graph/go_to_parameter_controller.h        |  2 +-
 apps/sequence/graph/graph_controller.h        |  2 +-
 apps/sequence/graph/graph_view.h              |  2 +-
 apps/sequence/graph/term_sum_controller.cpp   |  4 +-
 apps/sequence/graph/term_sum_controller.h     |  4 +-
 apps/sequence/list/list_controller.h          |  2 +-
 .../list/list_parameter_controller.cpp        |  6 +-
 .../sequence/list/list_parameter_controller.h |  4 +-
 apps/sequence/sequence_store.h                |  2 +-
 apps/sequence/values/values_controller.cpp    |  8 +--
 apps/sequence/values/values_controller.h      |  8 +--
 apps/shared/Makefile                          | 26 +++----
 apps/shared/cartesian_function.cpp            |  2 +-
 ...p => expression_model_list_controller.cpp} | 42 +++++------
 ...r.h => expression_model_list_controller.h} | 14 ++--
 ...l_store.cpp => expression_model_store.cpp} | 22 +++---
 ...model_store.h => expression_model_store.h} | 10 +--
 apps/shared/function_app.h                    |  6 +-
 ...egate.cpp => function_banner_delegate.cpp} |  2 +-
 ..._delegate.h => function_banner_delegate.h} |  6 +-
 ...> function_curve_parameter_controller.cpp} |  2 +-
 ... => function_curve_parameter_controller.h} |  6 +-
 ...> function_go_to_parameter_controller.cpp} |  2 +-
 ... => function_go_to_parameter_controller.h} |  4 +-
 ...ller.cpp => function_graph_controller.cpp} |  2 +-
 ...ntroller.h => function_graph_controller.h} | 12 ++--
 ...graph_view.cpp => function_graph_view.cpp} |  2 +-
 ...ion_graph_view.h => function_graph_view.h} |  4 +-
 ...oller.cpp => function_list_controller.cpp} | 14 ++--
 ...ontroller.h => function_list_controller.h} | 20 +++---
 ..._function_store.cpp => function_store.cpp} |  2 +-
 ...rage_function_store.h => function_store.h} | 10 +--
 ...ller.cpp => list_parameter_controller.cpp} | 24 +++----
 ...ntroller.h => list_parameter_controller.h} | 10 +--
 ...ontroller.cpp => sum_graph_controller.cpp} | 42 +++++------
 ...ph_controller.h => sum_graph_controller.h} | 12 ++--
 ...s_controller.cpp => values_controller.cpp} | 70 +++++++++----------
 ...alues_controller.h => values_controller.h} | 14 ++--
 ... values_function_parameter_controller.cpp} |  8 +--
 ...=> values_function_parameter_controller.h} |  8 +--
 apps/solver/equation_store.cpp                |  4 +-
 apps/solver/equation_store.h                  |  8 +--
 apps/solver/list_controller.cpp               |  4 +-
 apps/solver/list_controller.h                 | 18 ++---
 apps/variable_box_controller.cpp              |  2 +-
 apps/variable_box_controller.h                |  2 +-
 apps/variable_box_empty_controller.cpp        |  2 +-
 escher/src/selectable_table_view.cpp          |  2 +-
 80 files changed, 386 insertions(+), 386 deletions(-)
 rename apps/graph/{storage_cartesian_function_store.cpp => cartesian_function_store.cpp} (58%)
 rename apps/graph/{storage_cartesian_function_store.h => cartesian_function_store.h} (81%)
 rename apps/graph/list/{storage_list_controller.cpp => list_controller.cpp} (84%)
 rename apps/graph/list/{storage_list_controller.h => list_controller.h} (76%)
 rename apps/graph/values/{storage_derivative_parameter_controller.cpp => derivative_parameter_controller.cpp} (64%)
 rename apps/graph/values/{storage_derivative_parameter_controller.h => derivative_parameter_controller.h} (65%)
 rename apps/graph/values/{storage_function_parameter_controller.cpp => function_parameter_controller.cpp} (86%)
 rename apps/graph/values/{storage_function_parameter_controller.h => function_parameter_controller.h} (65%)
 rename apps/graph/values/{storage_values_controller.cpp => values_controller.cpp} (74%)
 rename apps/graph/values/{storage_values_controller.h => values_controller.h} (66%)
 rename apps/shared/{storage_expression_model_list_controller.cpp => expression_model_list_controller.cpp} (83%)
 rename apps/shared/{storage_expression_model_list_controller.h => expression_model_list_controller.h} (83%)
 rename apps/shared/{storage_expression_model_store.cpp => expression_model_store.cpp} (68%)
 rename apps/shared/{storage_expression_model_store.h => expression_model_store.h} (91%)
 rename apps/shared/{storage_function_banner_delegate.cpp => function_banner_delegate.cpp} (97%)
 rename apps/shared/{storage_function_banner_delegate.h => function_banner_delegate.h} (73%)
 rename apps/shared/{storage_function_curve_parameter_controller.cpp => function_curve_parameter_controller.cpp} (94%)
 rename apps/shared/{storage_function_curve_parameter_controller.h => function_curve_parameter_controller.h} (81%)
 rename apps/shared/{storage_function_go_to_parameter_controller.cpp => function_go_to_parameter_controller.cpp} (96%)
 rename apps/shared/{storage_function_go_to_parameter_controller.h => function_go_to_parameter_controller.h} (83%)
 rename apps/shared/{storage_function_graph_controller.cpp => function_graph_controller.cpp} (99%)
 rename apps/shared/{storage_function_graph_controller.h => function_graph_controller.h} (90%)
 rename apps/shared/{storage_function_graph_view.cpp => function_graph_view.cpp} (98%)
 rename apps/shared/{storage_function_graph_view.h => function_graph_view.h} (92%)
 rename apps/shared/{storage_function_list_controller.cpp => function_list_controller.cpp} (95%)
 rename apps/shared/{storage_function_list_controller.h => function_list_controller.h} (82%)
 rename apps/shared/{storage_function_store.cpp => function_store.cpp} (82%)
 rename apps/shared/{storage_function_store.h => function_store.h} (76%)
 rename apps/shared/{storage_list_parameter_controller.cpp => list_parameter_controller.cpp} (67%)
 rename apps/shared/{storage_list_parameter_controller.h => list_parameter_controller.h} (72%)
 rename apps/shared/{storage_sum_graph_controller.cpp => sum_graph_controller.cpp} (84%)
 rename apps/shared/{storage_sum_graph_controller.h => sum_graph_controller.h} (85%)
 rename apps/shared/{storage_values_controller.cpp => values_controller.cpp} (74%)
 rename apps/shared/{storage_values_controller.h => values_controller.h} (82%)
 rename apps/shared/{storage_values_function_parameter_controller.cpp => values_function_parameter_controller.cpp} (60%)
 rename apps/shared/{storage_values_function_parameter_controller.h => values_function_parameter_controller.h} (76%)

diff --git a/apps/graph/Makefile b/apps/graph/Makefile
index 8e7b1ef68..5f8ea6f7e 100644
--- a/apps/graph/Makefile
+++ b/apps/graph/Makefile
@@ -3,7 +3,7 @@ app_headers += apps/graph/app.h
 
 app_src += $(addprefix apps/graph/,\
   app.cpp \
-  storage_cartesian_function_store.cpp \
+  cartesian_function_store.cpp \
   graph/banner_view.cpp \
   graph/calculation_graph_controller.cpp \
   graph/calculation_parameter_controller.cpp \
@@ -16,12 +16,12 @@ app_src += $(addprefix apps/graph/,\
   graph/intersection_graph_controller.cpp \
   graph/root_graph_controller.cpp \
   graph/tangent_graph_controller.cpp \
+  list/list_controller.cpp \
   list/list_parameter_controller.cpp \
-  list/storage_list_controller.cpp \
   list/text_field_function_title_cell.cpp \
-  values/storage_derivative_parameter_controller.cpp \
-  values/storage_function_parameter_controller.cpp \
-  values/storage_values_controller.cpp \
+  values/derivative_parameter_controller.cpp \
+  values/function_parameter_controller.cpp \
+  values/values_controller.cpp \
 )
 
 i18n_files += $(addprefix apps/graph/,\
diff --git a/apps/graph/app.cpp b/apps/graph/app.cpp
index 138383411..40d00f345 100644
--- a/apps/graph/app.cpp
+++ b/apps/graph/app.cpp
@@ -36,7 +36,7 @@ App::Descriptor * App::Snapshot::descriptor() {
   return &descriptor;
 }
 
-StorageCartesianFunctionStore * App::Snapshot::functionStore() {
+CartesianFunctionStore * App::Snapshot::functionStore() {
   return &m_functionStore;
 }
 
diff --git a/apps/graph/app.h b/apps/graph/app.h
index 5dfeb4db7..795820047 100644
--- a/apps/graph/app.h
+++ b/apps/graph/app.h
@@ -2,10 +2,10 @@
 #define GRAPH_APP_H
 
 #include <escher.h>
-#include "storage_cartesian_function_store.h"
+#include "cartesian_function_store.h"
 #include "graph/graph_controller.h"
-#include "list/storage_list_controller.h"
-#include "values/storage_values_controller.h"
+#include "list/list_controller.h"
+#include "values/values_controller.h"
 #include "../shared/function_app.h"
 
 namespace Graph {
@@ -23,20 +23,20 @@ public:
     Snapshot();
     App * unpack(Container * container) override;
     Descriptor * descriptor() override;
-    StorageCartesianFunctionStore * functionStore() override;
+    CartesianFunctionStore * functionStore() override;
     Shared::InteractiveCurveViewRange * graphRange();
   private:
     void tidy() override;
-    StorageCartesianFunctionStore m_functionStore;
+    CartesianFunctionStore m_functionStore;
     Shared::InteractiveCurveViewRange m_graphRange;
   };
   InputViewController * inputViewController() override;
   char XNT() override;
   NestedMenuController * variableBoxForInputEventHandler(InputEventHandler * textInput) override;
-  StorageCartesianFunctionStore * functionStore() override { return static_cast<StorageCartesianFunctionStore *>(Shared::FunctionApp::functionStore()); }
+  CartesianFunctionStore * functionStore() override { return static_cast<CartesianFunctionStore *>(Shared::FunctionApp::functionStore()); }
 private:
   App(Container * container, Snapshot * snapshot);
-  StorageListController m_listController;
+  ListController m_listController;
   ButtonRowController m_listFooter;
   ButtonRowController m_listHeader;
   StackViewController m_listStackViewController;
@@ -44,7 +44,7 @@ private:
   AlternateEmptyViewController m_graphAlternateEmptyViewController;
   ButtonRowController m_graphHeader;
   StackViewController m_graphStackViewController;
-  StorageValuesController m_valuesController;
+  ValuesController m_valuesController;
   AlternateEmptyViewController m_valuesAlternateEmptyViewController;
   ButtonRowController m_valuesHeader;
   StackViewController m_valuesStackViewController;
diff --git a/apps/graph/storage_cartesian_function_store.cpp b/apps/graph/cartesian_function_store.cpp
similarity index 58%
rename from apps/graph/storage_cartesian_function_store.cpp
rename to apps/graph/cartesian_function_store.cpp
index ac73f7ae5..341ead7be 100644
--- a/apps/graph/storage_cartesian_function_store.cpp
+++ b/apps/graph/cartesian_function_store.cpp
@@ -1,4 +1,4 @@
-#include "storage_cartesian_function_store.h"
+#include "cartesian_function_store.h"
 extern "C" {
 #include <assert.h>
 #include <stddef.h>
@@ -9,18 +9,18 @@ using namespace Shared;
 
 namespace Graph {
 
-Ion::Storage::Record::ErrorStatus StorageCartesianFunctionStore::addEmptyModel() {
+Ion::Storage::Record::ErrorStatus CartesianFunctionStore::addEmptyModel() {
   Ion::Storage::Record::ErrorStatus error;
   CartesianFunction newModel = CartesianFunction::NewModel(&error);
   return error;
 }
 
-void StorageCartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
+void CartesianFunctionStore::setMemoizedModelAtIndex(int cacheIndex, Ion::Storage::Record record) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   m_functions[cacheIndex] = CartesianFunction(record);
 }
 
-ExpressionModelHandle * StorageCartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
+ExpressionModelHandle * CartesianFunctionStore::memoizedModelAtIndex(int cacheIndex) const {
   assert(cacheIndex >= 0 && cacheIndex < maxNumberOfMemoizedModels());
   return &m_functions[cacheIndex];
 }
diff --git a/apps/graph/storage_cartesian_function_store.h b/apps/graph/cartesian_function_store.h
similarity index 81%
rename from apps/graph/storage_cartesian_function_store.h
rename to apps/graph/cartesian_function_store.h
index 7a4c02151..cd47572ae 100644
--- a/apps/graph/storage_cartesian_function_store.h
+++ b/apps/graph/cartesian_function_store.h
@@ -1,14 +1,14 @@
-#ifndef GRAPH_STORAGE_CARTESIAN_FUNCTION_STORE_H
-#define GRAPH_STORAGE_CARTESIAN_FUNCTION_STORE_H
+#ifndef GRAPH_CARTESIAN_FUNCTION_STORE_H
+#define GRAPH_CARTESIAN_FUNCTION_STORE_H
 
 #include "../shared/cartesian_function.h"
-#include "../shared/storage_function_store.h"
+#include "../shared/function_store.h"
 #include <stdint.h>
 #include <escher.h>
 
 namespace Graph {
 
-class StorageCartesianFunctionStore : public Shared::FunctionStore {
+class CartesianFunctionStore : public Shared::FunctionStore {
 public:
   Shared::ExpiringPointer<Shared::CartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::CartesianFunction>(static_cast<Shared::CartesianFunction *>(privateModelForRecord(record))); }
   char symbol() const override { return Shared::CartesianFunction::Symbol(); }
diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 3c9ea8328..409e28cd4 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -84,7 +84,7 @@ Expression::Coordinate2D CalculationGraphController::computeNewPointOfInteresetF
   return computeNewPointOfInterest(start, step, max, myApp->localContext());
 }
 
-StorageCartesianFunctionStore * CalculationGraphController::functionStore() const {
+CartesianFunctionStore * CalculationGraphController::functionStore() const {
   App * a = static_cast<App *>(app());
   return a->functionStore();
 }
diff --git a/apps/graph/graph/calculation_graph_controller.h b/apps/graph/graph/calculation_graph_controller.h
index 01d748f9b..6404a373a 100644
--- a/apps/graph/graph/calculation_graph_controller.h
+++ b/apps/graph/graph/calculation_graph_controller.h
@@ -5,8 +5,8 @@
 #include "banner_view.h"
 #include "../../shared/curve_view_cursor.h"
 #include "../../shared/interactive_curve_view_range.h"
-#include "../../shared/storage_function_banner_delegate.h"
-#include "../storage_cartesian_function_store.h"
+#include "../../shared/function_banner_delegate.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
@@ -26,7 +26,7 @@ protected:
   virtual void reloadBannerView();
   bool moveCursor(int direction);
   Poincare::Expression::Coordinate2D computeNewPointOfInteresetFromAbscissa(double start, int direction);
-  StorageCartesianFunctionStore * functionStore() const;
+  CartesianFunctionStore * functionStore() const;
   virtual Poincare::Expression::Coordinate2D computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) = 0;
   GraphView * m_graphView;
   BannerView * m_bannerView;
diff --git a/apps/graph/graph/calculation_parameter_controller.h b/apps/graph/graph/calculation_parameter_controller.h
index 9c483122a..77b1cac88 100644
--- a/apps/graph/graph/calculation_parameter_controller.h
+++ b/apps/graph/graph/calculation_parameter_controller.h
@@ -2,7 +2,7 @@
 #define GRAPH_CALCULATION_PARAMETER_CONTROLLER_H
 
 #include <escher.h>
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 #include "tangent_graph_controller.h"
 #include "extremum_graph_controller.h"
 #include "integral_graph_controller.h"
diff --git a/apps/graph/graph/curve_parameter_controller.h b/apps/graph/graph/curve_parameter_controller.h
index 06be4cb71..275440db4 100644
--- a/apps/graph/graph/curve_parameter_controller.h
+++ b/apps/graph/graph/curve_parameter_controller.h
@@ -1,7 +1,7 @@
 #ifndef GRAPH_GRAPH_CURVE_PARAMETER_CONTROLLER_H
 #define GRAPH_GRAPH_CURVE_PARAMETER_CONTROLLER_H
 
-#include "../../shared/storage_function_curve_parameter_controller.h"
+#include "../../shared/function_curve_parameter_controller.h"
 #include "calculation_parameter_controller.h"
 #include "banner_view.h"
 
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index 2431d5222..e662fdbb8 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -7,7 +7,7 @@ namespace Graph {
 
 static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
-GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
+GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, CartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
   FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, curveViewRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
   m_bannerView(),
   m_view(functionStore, curveViewRange, m_cursor, &m_bannerView, &m_cursorView),
diff --git a/apps/graph/graph/graph_controller.h b/apps/graph/graph/graph_controller.h
index e7206a470..7daa8b0f5 100644
--- a/apps/graph/graph/graph_controller.h
+++ b/apps/graph/graph/graph_controller.h
@@ -5,17 +5,17 @@
 #include "graph_controller_helper.h"
 #include "banner_view.h"
 #include "curve_parameter_controller.h"
-#include "../../shared/storage_function_graph_controller.h"
+#include "../../shared/function_graph_controller.h"
 #include "../../shared/curve_view_cursor.h"
 #include "../../shared/round_cursor_view.h"
 #include "../../shared/interactive_curve_view_range.h"
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
 class GraphController : public Shared::FunctionGraphController, public GraphControllerHelper {
 public:
-  GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
+  GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, CartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
   void viewWillAppear() override;
   bool displayDerivativeInBanner() const;
@@ -33,7 +33,7 @@ private:
     return &m_cursorView;
   }
   CurveParameterController * curveParameterController() override;
-  StorageCartesianFunctionStore * functionStore() const override { return static_cast<StorageCartesianFunctionStore *>(Shared::FunctionGraphController::functionStore()); }
+  CartesianFunctionStore * functionStore() const override { return static_cast<CartesianFunctionStore *>(Shared::FunctionGraphController::functionStore()); }
   Shared::RoundCursorView m_cursorView;
   BannerView m_bannerView;
   GraphView m_view;
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index b4cdd4465..6928bf865 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -1,5 +1,5 @@
 #include "graph_controller_helper.h"
-#include "../../shared/storage_function_banner_delegate.h"
+#include "../../shared/function_banner_delegate.h"
 #include "../app.h"
 #include "../../constant.h"
 #include "../../shared/poincare_helpers.h"
diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index b6ebadfa0..57b8b37a2 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -4,7 +4,7 @@
 #include "../../shared/banner_view.h"
 #include "../../shared/text_field_delegate_app.h"
 #include "../../shared/interactive_curve_view_range.h"
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
diff --git a/apps/graph/graph/graph_view.cpp b/apps/graph/graph/graph_view.cpp
index 96f084c2c..203598cfb 100644
--- a/apps/graph/graph/graph_view.cpp
+++ b/apps/graph/graph/graph_view.cpp
@@ -5,7 +5,7 @@ using namespace Shared;
 
 namespace Graph {
 
-GraphView::GraphView(StorageCartesianFunctionStore * functionStore, InteractiveCurveViewRange * graphRange,
+GraphView::GraphView(CartesianFunctionStore * functionStore, InteractiveCurveViewRange * graphRange,
   CurveViewCursor * cursor, BannerView * bannerView, View * cursorView) :
   FunctionGraphView(graphRange, cursor, bannerView, cursorView),
   m_functionStore(functionStore),
diff --git a/apps/graph/graph/graph_view.h b/apps/graph/graph/graph_view.h
index 965da1fa0..294bb2b3f 100644
--- a/apps/graph/graph/graph_view.h
+++ b/apps/graph/graph/graph_view.h
@@ -1,15 +1,15 @@
 #ifndef GRAPH_GRAPH_VIEW_H
 #define GRAPH_GRAPH_VIEW_H
 
-#include "../../shared/storage_function_graph_view.h"
-#include "../storage_cartesian_function_store.h"
+#include "../../shared/function_graph_view.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
 class GraphView : public Shared::FunctionGraphView {
 public:
 
-  GraphView(StorageCartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * graphRange,
+  GraphView(CartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * graphRange,
     Shared::CurveViewCursor * cursor, Shared::BannerView * bannerView, View * cursorView);
   void reload() override;
   void drawRect(KDContext * ctx, KDRect rect) const override;
@@ -20,7 +20,7 @@ public:
    * of the graph where the area under the curve is colored. */
   void setAreaHighlightColor(bool highlightColor) override {};
 private:
-  StorageCartesianFunctionStore * m_functionStore;
+  CartesianFunctionStore * m_functionStore;
   bool m_tangent;
 };
 
diff --git a/apps/graph/graph/integral_graph_controller.cpp b/apps/graph/graph/integral_graph_controller.cpp
index 041807c0b..21eb36701 100644
--- a/apps/graph/graph/integral_graph_controller.cpp
+++ b/apps/graph/graph/integral_graph_controller.cpp
@@ -13,7 +13,7 @@ using namespace Poincare;
 namespace Graph {
 
 IntegralGraphController::IntegralGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointIntegral)
+  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointIntegral)
 {
 }
 
diff --git a/apps/graph/graph/integral_graph_controller.h b/apps/graph/graph/integral_graph_controller.h
index 29af61b60..6243127d7 100644
--- a/apps/graph/graph/integral_graph_controller.h
+++ b/apps/graph/graph/integral_graph_controller.h
@@ -3,11 +3,11 @@
 
 #include <escher.h>
 #include "graph_view.h"
-#include "../../shared/storage_sum_graph_controller.h"
+#include "../../shared/sum_graph_controller.h"
 
 namespace Graph {
 
-class IntegralGraphController : public Shared::StorageSumGraphController {
+class IntegralGraphController : public Shared::SumGraphController {
 public:
   IntegralGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, Shared::InteractiveCurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
diff --git a/apps/graph/graph/intersection_graph_controller.h b/apps/graph/graph/intersection_graph_controller.h
index c540bee79..b48c73459 100644
--- a/apps/graph/graph/intersection_graph_controller.h
+++ b/apps/graph/graph/intersection_graph_controller.h
@@ -2,7 +2,7 @@
 #define GRAPH_INTERSECTION_GRAPH_CONTROLLER_H
 
 #include "calculation_graph_controller.h"
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
diff --git a/apps/graph/graph/tangent_graph_controller.h b/apps/graph/graph/tangent_graph_controller.h
index aedf9f259..7067d80de 100644
--- a/apps/graph/graph/tangent_graph_controller.h
+++ b/apps/graph/graph/tangent_graph_controller.h
@@ -5,8 +5,8 @@
 #include "banner_view.h"
 #include "graph_controller_helper.h"
 #include "../../shared/simple_interactive_curve_view_controller.h"
-#include "../../shared/storage_function_banner_delegate.h"
-#include "../storage_cartesian_function_store.h"
+#include "../../shared/function_banner_delegate.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
diff --git a/apps/graph/list/storage_list_controller.cpp b/apps/graph/list/list_controller.cpp
similarity index 84%
rename from apps/graph/list/storage_list_controller.cpp
rename to apps/graph/list/list_controller.cpp
index 9734af536..df1bfa9c1 100644
--- a/apps/graph/list/storage_list_controller.cpp
+++ b/apps/graph/list/list_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_list_controller.h"
+#include "list_controller.h"
 #include "../app.h"
 #include <apps/i18n.h>
 #include <assert.h>
@@ -9,7 +9,7 @@ using namespace Shared;
 
 namespace Graph {
 
-StorageListController::StorageListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer) :
+ListController::ListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer) :
   Shared::FunctionListController(parentResponder, header, footer, I18n::Message::AddFunction),
   m_functionTitleCells{ //TODO find better initialization
     TextFieldFunctionTitleCell(this),
@@ -26,11 +26,11 @@ StorageListController::StorageListController(Responder * parentResponder, Button
   }
 }
 
-const char * StorageListController::title() {
+const char * ListController::title() {
   return I18n::translate(I18n::Message::FunctionTab);
 }
 
-void StorageListController::renameSelectedFunction() {
+void ListController::renameSelectedFunction() {
   assert(selectedColumn() == 0);
   assert(selectedRow() >= 0 && selectedRow() < numberOfRows()-1); // TODO change if sometimes the addFunction row is not displayed
 
@@ -45,7 +45,7 @@ void StorageListController::renameSelectedFunction() {
   selectedTitleCell->setEditing(true);
 }
 
-bool StorageListController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+bool ListController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
   assert(textField != nullptr);
   // Compute the new name
   size_t textLength = strlen(text);
@@ -113,7 +113,7 @@ bool StorageListController::textFieldDidFinishEditing(TextField * textField, con
   return false;
 }
 
-bool StorageListController::textFieldDidAbortEditing(TextField * textField) {
+bool ListController::textFieldDidAbortEditing(TextField * textField) {
   assert(textField != nullptr);
   // Put the name column back to normal size
   computeTitlesColumnWidth();
@@ -126,11 +126,11 @@ bool StorageListController::textFieldDidAbortEditing(TextField * textField) {
   return true;
 }
 
-bool StorageListController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
+bool ListController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
   return event == Ion::Events::Up || event == Ion::Events::Down || Shared::TextFieldDelegate::textFieldShouldFinishEditing(textField, event);
 }
 
-bool StorageListController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
+bool ListController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
   assert(textField != nullptr);
   if (textField->isEditing() && textField->shouldFinishEditing(event)) {
     return false;
@@ -138,30 +138,30 @@ bool StorageListController::textFieldDidReceiveEvent(TextField * textField, Ion:
   return Shared::TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
 }
 
-StorageListParameterController * StorageListController::parameterController() {
+Shared::ListParameterController * ListController::parameterController() {
   return &m_parameterController;
 }
 
-int StorageListController::maxNumberOfDisplayableRows() {
+int ListController::maxNumberOfDisplayableRows() {
   return k_maxNumberOfDisplayableRows;
 }
 
-FunctionTitleCell * StorageListController::titleCells(int index) {
+FunctionTitleCell * ListController::titleCells(int index) {
   assert(index >= 0 && index < k_maxNumberOfDisplayableRows);
   return &m_functionTitleCells[index];
 }
 
-HighlightCell * StorageListController::expressionCells(int index) {
+HighlightCell * ListController::expressionCells(int index) {
   assert(index >= 0 && index < k_maxNumberOfDisplayableRows);
   return &m_expressionCells[index];
 }
 
-void StorageListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
+void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
   assert(cell != nullptr);
   assert(j >= 0 && j < modelStore()->numberOfModels());
   TextFieldFunctionTitleCell * titleCell = static_cast<TextFieldFunctionTitleCell *>(cell);
   // Update the corresponding expression cell in order to get the baseline
-  StorageExpressionModelListController::willDisplayExpressionCellAtIndex(m_selectableTableView.cellAtLocation(1, j), j);
+  ExpressionModelListController::willDisplayExpressionCellAtIndex(m_selectableTableView.cellAtLocation(1, j), j);
   titleCell->setBaseline(baseline(j));
   if (!titleCell->isEditing()) {
     // Set name and color if the name is not being edited
@@ -172,7 +172,7 @@ void StorageListController::willDisplayTitleCellAtIndex(HighlightCell * cell, in
   }
 }
 
-void StorageListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
+void ListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   assert(cell != nullptr);
   assert(j >= 0 && j < modelStore()->numberOfModels());
   Shared::FunctionListController::willDisplayExpressionCellAtIndex(cell, j);
@@ -182,7 +182,7 @@ void StorageListController::willDisplayExpressionCellAtIndex(HighlightCell * cel
   myCell->setTextColor(textColor);
 }
 
-void StorageListController::setFunctionNameInTextField(ExpiringPointer<Function> function, TextField * textField) {
+void ListController::setFunctionNameInTextField(ExpiringPointer<Function> function, TextField * textField) {
   assert(textField != nullptr);
   char bufferName[BufferTextView::k_maxNumberOfChar];
   function->nameWithArgument(bufferName, BufferTextView::k_maxNumberOfChar, modelStore()->symbol());
diff --git a/apps/graph/list/storage_list_controller.h b/apps/graph/list/list_controller.h
similarity index 76%
rename from apps/graph/list/storage_list_controller.h
rename to apps/graph/list/list_controller.h
index 85c35bbb3..2841df254 100644
--- a/apps/graph/list/storage_list_controller.h
+++ b/apps/graph/list/list_controller.h
@@ -1,19 +1,19 @@
-#ifndef GRAPH_STORAGE_LIST_CONTROLLER_H
-#define GRAPH_STORAGE_LIST_CONTROLLER_H
+#ifndef GRAPH_LIST_CONTROLLER_H
+#define GRAPH_LIST_CONTROLLER_H
 
 #include <escher.h>
 #include "list_parameter_controller.h"
 #include "text_field_function_title_cell.h"
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 #include <apps/shared/function_expression_cell.h>
-#include <apps/shared/storage_function_list_controller.h>
+#include <apps/shared/function_list_controller.h>
 #include <apps/shared/text_field_delegate.h>
 
 namespace Graph {
 
-class StorageListController : public Shared::FunctionListController, public Shared::TextFieldDelegate {
+class ListController : public Shared::FunctionListController, public Shared::TextFieldDelegate {
 public:
-  StorageListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer);
+  ListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer);
   const char * title() override;
   void renameSelectedFunction();
   // TextFieldDelegate
@@ -23,7 +23,7 @@ public:
   bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
 private:
   constexpr static int k_maxNumberOfDisplayableRows = 5;
-  Shared::StorageListParameterController * parameterController() override;
+  Shared::ListParameterController * parameterController() override;
   int maxNumberOfDisplayableRows() override;
   Shared::FunctionTitleCell * titleCells(int index) override;
   HighlightCell * expressionCells(int index) override;
diff --git a/apps/graph/list/list_parameter_controller.cpp b/apps/graph/list/list_parameter_controller.cpp
index eeb8706f2..29e1bf442 100644
--- a/apps/graph/list/list_parameter_controller.cpp
+++ b/apps/graph/list/list_parameter_controller.cpp
@@ -1,5 +1,5 @@
 #include "list_parameter_controller.h"
-#include "storage_list_controller.h"
+#include "list_controller.h"
 #include <assert.h>
 
 using namespace Shared;
@@ -10,7 +10,7 @@ HighlightCell * ListParameterController::reusableCell(int index) {
   if (index == 0) {
     return &m_renameCell;
   }
-  return StorageListParameterController::reusableCell(index -1);
+  return ListParameterController::reusableCell(index -1);
 }
 
 bool ListParameterController::handleEnterOnRow(int rowIndex) {
@@ -18,7 +18,7 @@ bool ListParameterController::handleEnterOnRow(int rowIndex) {
     renameFunction();
     return true;
   }
-  return StorageListParameterController::handleEnterOnRow(rowIndex-1);
+  return ListParameterController::handleEnterOnRow(rowIndex-1);
 }
 
 void ListParameterController::renameFunction() {
diff --git a/apps/graph/list/list_parameter_controller.h b/apps/graph/list/list_parameter_controller.h
index bad5bd24c..ac127169f 100644
--- a/apps/graph/list/list_parameter_controller.h
+++ b/apps/graph/list/list_parameter_controller.h
@@ -1,16 +1,16 @@
 #ifndef GRAPH_LIST_LIST_PARAM_CONTROLLER_H
 #define GRAPH_LIST_LIST_PARAM_CONTROLLER_H
 
-#include <apps/shared/storage_list_parameter_controller.h>
+#include <apps/shared/list_parameter_controller.h>
 
 namespace Graph {
 
-class StorageListController;
+class ListController;
 
-class ListParameterController : public Shared::StorageListParameterController {
+class ListParameterController : public Shared::ListParameterController {
 public:
-  ListParameterController(StorageListController * listController, Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr) :
-    Shared::StorageListParameterController(parentResponder, functionColorMessage, deleteFunctionMessage, tableDelegate),
+  ListParameterController(ListController * listController, Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr) :
+    Shared::ListParameterController(parentResponder, functionColorMessage, deleteFunctionMessage, tableDelegate),
     m_listController(listController),
     m_renameCell(I18n::Message::Rename)
   {}
@@ -19,10 +19,10 @@ protected:
   bool handleEnterOnRow(int rowIndex) override;
 private:
   int totalNumberOfCells() const override {
-    return Shared::StorageListParameterController::totalNumberOfCells() + 1;
+    return Shared::ListParameterController::totalNumberOfCells() + 1;
   }
   void renameFunction();
-  StorageListController * m_listController;
+  ListController * m_listController;
   MessageTableCell m_renameCell;
 };
 
diff --git a/apps/graph/list/text_field_function_title_cell.cpp b/apps/graph/list/text_field_function_title_cell.cpp
index e3301b258..56057d888 100644
--- a/apps/graph/list/text_field_function_title_cell.cpp
+++ b/apps/graph/list/text_field_function_title_cell.cpp
@@ -1,5 +1,5 @@
 #include "text_field_function_title_cell.h"
-#include "storage_list_controller.h"
+#include "list_controller.h"
 #include <assert.h>
 
 namespace Graph {
@@ -7,7 +7,7 @@ namespace Graph {
 static inline float minFloat(float x, float y) { return x < y ? x : y; }
 static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
-TextFieldFunctionTitleCell::TextFieldFunctionTitleCell(StorageListController * listController, Orientation orientation, const KDFont * font) :
+TextFieldFunctionTitleCell::TextFieldFunctionTitleCell(ListController * listController, Orientation orientation, const KDFont * font) :
   Shared::FunctionTitleCell(orientation),
   Responder(listController),
   m_textField(Shared::Function::k_parenthesedArgumentLength, this, m_textFieldBuffer, m_textFieldBuffer, k_textFieldBufferSize, nullptr, listController, false, font, 1.0f, 0.5f)
diff --git a/apps/graph/list/text_field_function_title_cell.h b/apps/graph/list/text_field_function_title_cell.h
index 421a96d6c..68b1cbf25 100644
--- a/apps/graph/list/text_field_function_title_cell.h
+++ b/apps/graph/list/text_field_function_title_cell.h
@@ -7,11 +7,11 @@
 
 namespace Graph {
 
-class StorageListController;
+class ListController;
 
 class TextFieldFunctionTitleCell : public Shared::FunctionTitleCell, public Responder {
 public:
-  TextFieldFunctionTitleCell(StorageListController * listController, Orientation orientation = Orientation::VerticalIndicator, const KDFont * font = KDFont::LargeFont);
+  TextFieldFunctionTitleCell(ListController * listController, Orientation orientation = Orientation::VerticalIndicator, const KDFont * font = KDFont::LargeFont);
   TextField * textField() { return &m_textField; }
   void setEditing(bool editing);
   bool isEditing() const;
diff --git a/apps/graph/values/storage_derivative_parameter_controller.cpp b/apps/graph/values/derivative_parameter_controller.cpp
similarity index 64%
rename from apps/graph/values/storage_derivative_parameter_controller.cpp
rename to apps/graph/values/derivative_parameter_controller.cpp
index 91bef595a..c7d44b95e 100644
--- a/apps/graph/values/storage_derivative_parameter_controller.cpp
+++ b/apps/graph/values/derivative_parameter_controller.cpp
@@ -1,11 +1,11 @@
-#include "storage_derivative_parameter_controller.h"
-#include "storage_values_controller.h"
+#include "derivative_parameter_controller.h"
+#include "values_controller.h"
 #include "../app.h"
 #include <assert.h>
 
 namespace Graph {
 
-StorageDerivativeParameterController::StorageDerivativeParameterController(StorageValuesController * valuesController) :
+DerivativeParameterController::DerivativeParameterController(ValuesController * valuesController) :
   ViewController(valuesController),
   m_hideColumn(I18n::Message::HideDerivativeColumn),
 #if COPY_COLUMN
@@ -17,24 +17,24 @@ StorageDerivativeParameterController::StorageDerivativeParameterController(Stora
 {
 }
 
-void StorageDerivativeParameterController::viewWillAppear() {
+void DerivativeParameterController::viewWillAppear() {
   functionStore()->modelForRecord(m_record)->derivativeNameWithArgument(m_pageTitle, k_maxNumberOfCharsInTitle, Shared::CartesianFunction::Symbol());
 }
 
-const char * StorageDerivativeParameterController::title() {
+const char * DerivativeParameterController::title() {
   return m_pageTitle;
 }
 
-View * StorageDerivativeParameterController::view() {
+View * DerivativeParameterController::view() {
   return &m_selectableTableView;
 }
 
-void StorageDerivativeParameterController::didBecomeFirstResponder() {
+void DerivativeParameterController::didBecomeFirstResponder() {
   selectCellAtLocation(0, 0);
   app()->setFirstResponder(&m_selectableTableView);
 }
 
-bool StorageDerivativeParameterController::handleEvent(Ion::Events::Event event) {
+bool DerivativeParameterController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     switch (selectedRow()) {
       case 0:
@@ -58,11 +58,11 @@ bool StorageDerivativeParameterController::handleEvent(Ion::Events::Event event)
   return false;
 }
 
-int StorageDerivativeParameterController::numberOfRows() {
+int DerivativeParameterController::numberOfRows() {
   return k_totalNumberOfCell;
 };
 
-HighlightCell * StorageDerivativeParameterController::reusableCell(int index) {
+HighlightCell * DerivativeParameterController::reusableCell(int index) {
   assert(index >= 0);
   assert(index < k_totalNumberOfCell);
 #if COPY_COLUMN
@@ -73,15 +73,15 @@ HighlightCell * StorageDerivativeParameterController::reusableCell(int index) {
   return cells[index];
 }
 
-int StorageDerivativeParameterController::reusableCellCount() {
+int DerivativeParameterController::reusableCellCount() {
   return k_totalNumberOfCell;
 }
 
-KDCoordinate StorageDerivativeParameterController::cellHeight() {
+KDCoordinate DerivativeParameterController::cellHeight() {
   return Metric::ParameterCellHeight;
 }
 
-StorageCartesianFunctionStore * StorageDerivativeParameterController::functionStore() {
+CartesianFunctionStore * DerivativeParameterController::functionStore() {
   App * a = static_cast<App *>(app());
   return a->functionStore();
 }
diff --git a/apps/graph/values/storage_derivative_parameter_controller.h b/apps/graph/values/derivative_parameter_controller.h
similarity index 65%
rename from apps/graph/values/storage_derivative_parameter_controller.h
rename to apps/graph/values/derivative_parameter_controller.h
index 5680aff98..bd643b334 100644
--- a/apps/graph/values/storage_derivative_parameter_controller.h
+++ b/apps/graph/values/derivative_parameter_controller.h
@@ -1,16 +1,16 @@
-#ifndef GRAPH_STORAGE_DERIVATIVE_PARAM_CONTROLLER_H
-#define GRAPH_STORAGE_DERIVATIVE_PARAM_CONTROLLER_H
+#ifndef GRAPH_DERIVATIVE_PARAM_CONTROLLER_H
+#define GRAPH_DERIVATIVE_PARAM_CONTROLLER_H
 
 #include <escher.h>
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 
 namespace Graph {
 
-class StorageValuesController;
+class ValuesController;
 
-class StorageDerivativeParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class DerivativeParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  StorageDerivativeParameterController(StorageValuesController * valuesController);
+  DerivativeParameterController(ValuesController * valuesController);
 
   View * view() override;
   const char * title() override;
@@ -25,7 +25,7 @@ public:
     m_record = record;
   }
 private:
-  StorageCartesianFunctionStore * functionStore();
+  CartesianFunctionStore * functionStore();
 #if COPY_COLUMN
   constexpr static int k_totalNumberOfCell = 2;
 #else
@@ -39,7 +39,7 @@ private:
 #endif
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
-  StorageValuesController * m_valuesController;
+  ValuesController * m_valuesController;
 };
 
 }
diff --git a/apps/graph/values/storage_function_parameter_controller.cpp b/apps/graph/values/function_parameter_controller.cpp
similarity index 86%
rename from apps/graph/values/storage_function_parameter_controller.cpp
rename to apps/graph/values/function_parameter_controller.cpp
index a9371be7c..2ceca2e65 100644
--- a/apps/graph/values/storage_function_parameter_controller.cpp
+++ b/apps/graph/values/function_parameter_controller.cpp
@@ -1,5 +1,5 @@
-#include "storage_function_parameter_controller.h"
-#include "storage_values_controller.h"
+#include "function_parameter_controller.h"
+#include "values_controller.h"
 #include "../app.h"
 #include <assert.h>
 
@@ -7,8 +7,8 @@ using namespace Shared;
 
 namespace Graph {
 
-FunctionParameterController::FunctionParameterController(StorageValuesController * valuesController) :
-  StorageValuesFunctionParameterController(CartesianFunction::Symbol()),
+FunctionParameterController::FunctionParameterController(ValuesController * valuesController) :
+  ValuesFunctionParameterController(CartesianFunction::Symbol()),
   m_displayDerivativeColumn(I18n::Message::DerivativeFunctionColumn),
   m_valuesController(valuesController)
 {
@@ -58,7 +58,7 @@ int FunctionParameterController::reusableCellCount() {
 }
 
 void FunctionParameterController::viewWillAppear() {
-  StorageValuesFunctionParameterController::viewWillAppear();
+  ValuesFunctionParameterController::viewWillAppear();
   m_selectedFunctionColumn = m_valuesController->selectedColumn();
 }
 
diff --git a/apps/graph/values/storage_function_parameter_controller.h b/apps/graph/values/function_parameter_controller.h
similarity index 65%
rename from apps/graph/values/storage_function_parameter_controller.h
rename to apps/graph/values/function_parameter_controller.h
index 5e652566f..01f80ce32 100644
--- a/apps/graph/values/storage_function_parameter_controller.h
+++ b/apps/graph/values/function_parameter_controller.h
@@ -1,17 +1,17 @@
-#ifndef GRAPH_STORAGE_FUNCTION_PARAM_CONTROLLER_H
-#define GRAPH_STORAGE_FUNCTION_PARAM_CONTROLLER_H
+#ifndef GRAPH_FUNCTION_PARAM_CONTROLLER_H
+#define GRAPH_FUNCTION_PARAM_CONTROLLER_H
 
 #include "../../shared/expiring_pointer.h"
 #include "../../shared/cartesian_function.h"
-#include "../../shared/storage_values_function_parameter_controller.h"
+#include "../../shared/values_function_parameter_controller.h"
 
 namespace Graph {
 
-class StorageValuesController;
+class ValuesController;
 
-class FunctionParameterController : public Shared::StorageValuesFunctionParameterController {
+class FunctionParameterController : public Shared::ValuesFunctionParameterController {
 public:
-  FunctionParameterController(StorageValuesController * valuesController);
+  FunctionParameterController(ValuesController * valuesController);
   bool handleEvent(Ion::Events::Event event) override;
   int numberOfRows() override;
   HighlightCell * reusableCell(int index) override;
@@ -26,7 +26,7 @@ private:
   constexpr static int k_totalNumberOfCell = 1;
 #endif
   MessageTableCellWithSwitch m_displayDerivativeColumn;
-  StorageValuesController * m_valuesController;
+  ValuesController * m_valuesController;
   // Index of the column corresponding to the function in the values controller
   int m_selectedFunctionColumn;
 };
diff --git a/apps/graph/values/storage_values_controller.cpp b/apps/graph/values/values_controller.cpp
similarity index 74%
rename from apps/graph/values/storage_values_controller.cpp
rename to apps/graph/values/values_controller.cpp
index c2ca320e7..85310c9ca 100644
--- a/apps/graph/values/storage_values_controller.cpp
+++ b/apps/graph/values/values_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_values_controller.h"
+#include "values_controller.h"
 #include <assert.h>
 #include "../../constant.h"
 
@@ -7,8 +7,8 @@ using namespace Poincare;
 
 namespace Graph {
 
-StorageValuesController::StorageValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Interval * interval, ButtonRowController * header) :
-  Shared::StorageValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::X, &m_intervalParameterController, interval),
+ValuesController::ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Interval * interval, ButtonRowController * header) :
+  Shared::ValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::X, &m_intervalParameterController, interval),
   m_functionTitleCells{},
   m_floatCells{},
   m_functionParameterController(this),
@@ -21,17 +21,17 @@ StorageValuesController::StorageValuesController(Responder * parentResponder, In
   }
 }
 
-bool StorageValuesController::handleEvent(Ion::Events::Event event) {
+bool ValuesController::handleEvent(Ion::Events::Event event) {
   if ((event == Ion::Events::OK || event == Ion::Events::EXE) && selectedRow() == 0
       && selectedColumn()>0 && isDerivativeColumn(selectedColumn())) {
     configureDerivativeFunction();
     return true;
   }
-  return Shared::StorageValuesController::handleEvent(event);
+  return Shared::ValuesController::handleEvent(event);
 }
 
-void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  Shared::StorageValuesController::willDisplayCellAtLocation(cell, i, j);
+void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
+  Shared::ValuesController::willDisplayCellAtLocation(cell, i, j);
   // The cell is the abscissa title cell:
   if (j == 0 && i == 0) {
     EvenOddMessageTextCell * mytitleCell = (EvenOddMessageTextCell *)cell;
@@ -57,18 +57,18 @@ void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, in
   }
 }
 
-I18n::Message StorageValuesController::emptyMessage() {
+I18n::Message ValuesController::emptyMessage() {
   if (functionStore()->numberOfDefinedModels() == 0) {
     return I18n::Message::NoFunction;
   }
   return I18n::Message::NoActivatedFunction;
 }
 
-IntervalParameterController * StorageValuesController::intervalParameterController() {
+IntervalParameterController * ValuesController::intervalParameterController() {
   return &m_intervalParameterController;
 }
 
-Ion::Storage::Record StorageValuesController::recordAtColumn(int i) {
+Ion::Storage::Record ValuesController::recordAtColumn(int i) {
   assert(i > 0);
   int index = 1;
   for (int k = 0; k < functionStore()->numberOfDefinedModels(); k++) {
@@ -91,7 +91,7 @@ Ion::Storage::Record StorageValuesController::recordAtColumn(int i) {
   return nullptr;
 }
 
-bool StorageValuesController::isDerivativeColumn(int i) {
+bool ValuesController::isDerivativeColumn(int i) {
   assert(i >= 1);
   int index = 1;
   for (int k = 0; k < functionStore()->numberOfDefinedModels(); k++) {
@@ -113,35 +113,35 @@ bool StorageValuesController::isDerivativeColumn(int i) {
   return false;
 }
 
-void StorageValuesController::configureDerivativeFunction() {
+void ValuesController::configureDerivativeFunction() {
   m_derivativeParameterController.setRecord(recordAtColumn(selectedColumn()));
   StackViewController * stack = stackController();
   stack->push(&m_derivativeParameterController);
 }
 
-int StorageValuesController::maxNumberOfCells() {
+int ValuesController::maxNumberOfCells() {
   return k_maxNumberOfCells;
 }
 
-int StorageValuesController::maxNumberOfFunctions() {
+int ValuesController::maxNumberOfFunctions() {
   return k_maxNumberOfFunctions;
 }
 
-Shared::BufferFunctionTitleCell * StorageValuesController::functionTitleCells(int j) {
+Shared::BufferFunctionTitleCell * ValuesController::functionTitleCells(int j) {
   assert(j >= 0 && j < k_maxNumberOfFunctions);
   return &m_functionTitleCells[j];
 }
 
-EvenOddBufferTextCell * StorageValuesController::floatCells(int j) {
+EvenOddBufferTextCell * ValuesController::floatCells(int j) {
   assert(j >= 0 && j < k_maxNumberOfCells);
   return &m_floatCells[j];
 }
 
-FunctionParameterController * StorageValuesController::functionParameterController() {
+FunctionParameterController * ValuesController::functionParameterController() {
   return &m_functionParameterController;
 }
 
-double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
+double ValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   bool isDerivative = isDerivativeColumn(columnIndex);
   /* isDerivativeColumn uses expiring pointers, so "function" must be created
@@ -153,7 +153,7 @@ double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, in
   return function->evaluateAtAbscissa(abscissa, myApp->localContext());
 }
 
-void StorageValuesController::updateNumberOfColumns() {
+void ValuesController::updateNumberOfColumns() {
   int result = 1;
   for (int i = 0; i < functionStore()->numberOfActiveFunctions(); i++) {
     ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(i));
diff --git a/apps/graph/values/storage_values_controller.h b/apps/graph/values/values_controller.h
similarity index 66%
rename from apps/graph/values/storage_values_controller.h
rename to apps/graph/values/values_controller.h
index 3233e70d0..6b55d1e57 100644
--- a/apps/graph/values/storage_values_controller.h
+++ b/apps/graph/values/values_controller.h
@@ -1,18 +1,18 @@
 #ifndef GRAPH_VALUES_CONTROLLER_H
 #define GRAPH_VALUES_CONTROLLER_H
 
-#include "../storage_cartesian_function_store.h"
+#include "../cartesian_function_store.h"
 #include "../../shared/buffer_function_title_cell.h"
-#include "../../shared/storage_values_controller.h"
+#include "../../shared/values_controller.h"
 #include "../../shared/interval_parameter_controller.h"
-#include "storage_derivative_parameter_controller.h"
-#include "storage_function_parameter_controller.h"
+#include "derivative_parameter_controller.h"
+#include "function_parameter_controller.h"
 
 namespace Graph {
 
-class StorageValuesController : public Shared::StorageValuesController {
+class ValuesController : public Shared::ValuesController {
 public:
-  StorageValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Shared::Interval * interval, ButtonRowController * header);
+  ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Shared::Interval * interval, ButtonRowController * header);
   bool handleEvent(Ion::Events::Event event) override;
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
   I18n::Message emptyMessage() override;
@@ -27,7 +27,7 @@ private:
   int maxNumberOfCells() override;
   int maxNumberOfFunctions() override;
   double evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) override;
-  StorageCartesianFunctionStore * functionStore() const override { return static_cast<StorageCartesianFunctionStore *>(Shared::StorageValuesController::functionStore()); }
+  CartesianFunctionStore * functionStore() const override { return static_cast<CartesianFunctionStore *>(Shared::ValuesController::functionStore()); }
   Shared::BufferFunctionTitleCell * functionTitleCells(int j) override;
   EvenOddBufferTextCell * floatCells(int j) override;
   FunctionParameterController * functionParameterController() override;
@@ -36,7 +36,7 @@ private:
   EvenOddBufferTextCell m_floatCells[k_maxNumberOfCells];
   FunctionParameterController m_functionParameterController;
   Shared::IntervalParameterController m_intervalParameterController;
-  StorageDerivativeParameterController m_derivativeParameterController;
+  DerivativeParameterController m_derivativeParameterController;
 };
 
 }
diff --git a/apps/sequence/graph/curve_parameter_controller.h b/apps/sequence/graph/curve_parameter_controller.h
index d3cf4e728..37e0eb54f 100644
--- a/apps/sequence/graph/curve_parameter_controller.h
+++ b/apps/sequence/graph/curve_parameter_controller.h
@@ -2,7 +2,7 @@
 #define SEQUENCE_CURVE_PARAMETER_CONTROLLER_H
 
 #include <escher.h>
-#include "../../shared/storage_function_curve_parameter_controller.h"
+#include "../../shared/function_curve_parameter_controller.h"
 #include "go_to_parameter_controller.h"
 
 namespace Sequence {
diff --git a/apps/sequence/graph/go_to_parameter_controller.h b/apps/sequence/graph/go_to_parameter_controller.h
index 2021aa018..adf6dd31b 100644
--- a/apps/sequence/graph/go_to_parameter_controller.h
+++ b/apps/sequence/graph/go_to_parameter_controller.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_GO_TO_PARAMETER_CONTROLLER_H
 #define SEQUENCE_GO_TO_PARAMETER_CONTROLLER_H
 
-#include "../../shared/storage_function_go_to_parameter_controller.h"
+#include "../../shared/function_go_to_parameter_controller.h"
 
 namespace Sequence {
 
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 0aac68efd..62cab8af7 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -6,7 +6,7 @@
 #include "curve_parameter_controller.h"
 #include "curve_view_range.h"
 #include "term_sum_controller.h"
-#include "../../shared/storage_function_graph_controller.h"
+#include "../../shared/function_graph_controller.h"
 #include "../../shared/cursor_view.h"
 #include "../sequence_store.h"
 
diff --git a/apps/sequence/graph/graph_view.h b/apps/sequence/graph/graph_view.h
index 1f0fce5c3..97d35ea99 100644
--- a/apps/sequence/graph/graph_view.h
+++ b/apps/sequence/graph/graph_view.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_GRAPH_VIEW_H
 #define SEQUENCE_GRAPH_VIEW_H
 
-#include "../../shared/storage_function_graph_view.h"
+#include "../../shared/function_graph_view.h"
 #include "../sequence_store.h"
 
 namespace Sequence {
diff --git a/apps/sequence/graph/term_sum_controller.cpp b/apps/sequence/graph/term_sum_controller.cpp
index 8126f0577..71cad17bb 100644
--- a/apps/sequence/graph/term_sum_controller.cpp
+++ b/apps/sequence/graph/term_sum_controller.cpp
@@ -17,7 +17,7 @@ using namespace Poincare;
 namespace Sequence {
 
 TermSumController::TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, CurveViewCursor * cursor) :
-  StorageSumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
+  SumGraphController(parentResponder, inputEventHandlerDelegate, graphView, graphRange, cursor, UCodePointNArySummation)
 {
 }
 
@@ -29,7 +29,7 @@ bool TermSumController::moveCursorHorizontallyToPosition(double position) {
   if (position < 0.0) {
     return false;
   }
-  return StorageSumGraphController::moveCursorHorizontallyToPosition(std::round(position));
+  return SumGraphController::moveCursorHorizontallyToPosition(std::round(position));
 }
 
 I18n::Message TermSumController::legendMessageAtStep(Step step) {
diff --git a/apps/sequence/graph/term_sum_controller.h b/apps/sequence/graph/term_sum_controller.h
index 9f00cacc8..092c3377c 100644
--- a/apps/sequence/graph/term_sum_controller.h
+++ b/apps/sequence/graph/term_sum_controller.h
@@ -5,11 +5,11 @@
 #include <poincare/layout.h>
 #include "graph_view.h"
 #include "curve_view_range.h"
-#include "../../shared/storage_sum_graph_controller.h"
+#include "../../shared/sum_graph_controller.h"
 
 namespace Sequence {
 
-class TermSumController : public Shared::StorageSumGraphController {
+class TermSumController : public Shared::SumGraphController {
 public:
   TermSumController(Responder * parentResponder, ::InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
diff --git a/apps/sequence/list/list_controller.h b/apps/sequence/list/list_controller.h
index 0606a6e5e..e7b639471 100644
--- a/apps/sequence/list/list_controller.h
+++ b/apps/sequence/list/list_controller.h
@@ -5,7 +5,7 @@
 #include "../sequence_title_cell.h"
 #include "../sequence_store.h"
 #include "../../shared/function_expression_cell.h"
-#include "../../shared/storage_function_list_controller.h"
+#include "../../shared/function_list_controller.h"
 #include "../../shared/input_event_handler_delegate.h"
 #include "../../shared/layout_field_delegate.h"
 #include "../../shared/text_field_delegate.h"
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index 122bc5492..b8b927402 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -10,7 +10,7 @@ using namespace Shared;
 namespace Sequence {
 
 ListParameterController::ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * listController) :
-  Shared::StorageListParameterController(listController, I18n::Message::SequenceColor, I18n::Message::DeleteSequence, this),
+  Shared::ListParameterController(listController, I18n::Message::SequenceColor, I18n::Message::DeleteSequence, this),
   m_typeCell(I18n::Message::SequenceType),
   m_initialRankCell(&m_selectableTableView, inputEventHandlerDelegate, this, m_draftTextBuffer, I18n::Message::FirstTermIndex),
   m_typeParameterController(this, listController, TableCell::Layout::Horizontal, Metric::CommonTopMargin, Metric::CommonRightMargin,
@@ -75,13 +75,13 @@ HighlightCell * ListParameterController::reusableCell(int index) {
         return &m_initialRankCell;
       }
     default:
-      return Shared::StorageListParameterController::reusableCell(index-1-hasInitialRankRow());
+      return Shared::ListParameterController::reusableCell(index-1-hasInitialRankRow());
   }
 }
 
 void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
   cell->setHighlighted(index == selectedRow()); // See FIXME in SelectableTableView::reloadData()
-  Shared::StorageListParameterController::willDisplayCellForIndex(cell, index);
+  Shared::ListParameterController::willDisplayCellForIndex(cell, index);
   if (cell == &m_typeCell && !m_record.isNull()) {
     m_typeCell.setLayout(sequence()->definitionName());
   }
diff --git a/apps/sequence/list/list_parameter_controller.h b/apps/sequence/list/list_parameter_controller.h
index e65adc82e..f7a7d5eaa 100644
--- a/apps/sequence/list/list_parameter_controller.h
+++ b/apps/sequence/list/list_parameter_controller.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_LIST_PARAM_CONTROLLER_H
 #define SEQUENCE_LIST_PARAM_CONTROLLER_H
 
-#include "../../shared/storage_list_parameter_controller.h"
+#include "../../shared/list_parameter_controller.h"
 #include "../../shared/parameter_text_field_delegate.h"
 #include "../sequence.h"
 #include "../sequence_store.h"
@@ -11,7 +11,7 @@ namespace Sequence {
 
 class ListController;
 
-class ListParameterController : public Shared::StorageListParameterController, public SelectableTableViewDelegate, public Shared::ParameterTextFieldDelegate {
+class ListParameterController : public Shared::ListParameterController, public SelectableTableViewDelegate, public Shared::ParameterTextFieldDelegate {
 public:
   ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * list);
   const char * title() override;
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index a4127e977..b13f6c376 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -1,7 +1,7 @@
 #ifndef SEQUENCE_SEQUENCE_STORE_H
 #define SEQUENCE_SEQUENCE_STORE_H
 
-#include "../shared/storage_function_store.h"
+#include "../shared/function_store.h"
 #include "../shared/global_context.h"
 #include "sequence.h"
 #include <stdint.h>
diff --git a/apps/sequence/values/values_controller.cpp b/apps/sequence/values/values_controller.cpp
index 8b46ec61d..5bb6a3880 100644
--- a/apps/sequence/values/values_controller.cpp
+++ b/apps/sequence/values/values_controller.cpp
@@ -7,7 +7,7 @@ using namespace Shared;
 namespace Sequence {
 
 ValuesController::ValuesController(Responder * parentResponder,InputEventHandlerDelegate * inputEventHandlerDelegate, Interval * interval, ButtonRowController * header) :
-  Shared::StorageValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::NColumn, &m_intervalParameterController, interval),
+  Shared::ValuesController(parentResponder, inputEventHandlerDelegate, header, I18n::Message::NColumn, &m_intervalParameterController, interval),
   m_sequenceTitleCells{},
   m_floatCells{},
 #if COPY_COLUMN
@@ -21,7 +21,7 @@ ValuesController::ValuesController(Responder * parentResponder,InputEventHandler
 }
 
 void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
-  Shared::StorageValuesController::willDisplayCellAtLocation(cell, i, j);
+  Shared::ValuesController::willDisplayCellAtLocation(cell, i, j);
   // The cell is the abscissa title cell:
   if (j == 0 && i == 0) {
     EvenOddMessageTextCell * mytitleCell = (EvenOddMessageTextCell *)cell;
@@ -52,7 +52,7 @@ bool ValuesController::setDataAtLocation(double floatBody, int columnIndex, int
   if (floatBody < 0) {
       return false;
   }
-  return Shared::StorageValuesController::setDataAtLocation(std::round(floatBody), columnIndex, rowIndex);
+  return Shared::ValuesController::setDataAtLocation(std::round(floatBody), columnIndex, rowIndex);
 }
 
 int ValuesController::maxNumberOfCells() {
@@ -73,7 +73,7 @@ EvenOddBufferTextCell * ValuesController::floatCells(int j) {
   return &m_floatCells[j];
 }
 
-Shared::StorageValuesFunctionParameterController * ValuesController::functionParameterController() {
+Shared::ValuesFunctionParameterController * ValuesController::functionParameterController() {
 #if COPY_COLUMN
   return &m_sequenceParameterController;
 #else
diff --git a/apps/sequence/values/values_controller.h b/apps/sequence/values/values_controller.h
index 3f4902f07..eb8645ab0 100644
--- a/apps/sequence/values/values_controller.h
+++ b/apps/sequence/values/values_controller.h
@@ -3,12 +3,12 @@
 
 #include "../sequence_store.h"
 #include "../sequence_title_cell.h"
-#include "../../shared/storage_values_controller.h"
+#include "../../shared/values_controller.h"
 #include "interval_parameter_controller.h"
 
 namespace Sequence {
 
-class ValuesController : public Shared::StorageValuesController {
+class ValuesController : public Shared::ValuesController {
 public:
   ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, Shared::Interval * interval, ButtonRowController * header);
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
@@ -24,11 +24,11 @@ private:
   SequenceTitleCell * functionTitleCells(int j) override;
   EvenOddBufferTextCell m_floatCells[k_maxNumberOfCells];
   EvenOddBufferTextCell * floatCells(int j) override;
-  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::StorageValuesController::functionStore()); }
+  SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::ValuesController::functionStore()); }
 #if COPY_COLUMN
   Shared::ValuesFunctionParameterController m_sequenceParameterController;
 #endif
-  Shared::StorageValuesFunctionParameterController * functionParameterController() override;
+  Shared::ValuesFunctionParameterController * functionParameterController() override;
   IntervalParameterController m_intervalParameterController;
 };
 
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index 95dce6218..53d887f1a 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -13,10 +13,19 @@ app_src += $(addprefix apps/shared/,\
   expression_field_delegate_app.cpp \
   expression_model.cpp \
   expression_model_handle.cpp \
+  expression_model_list_controller.cpp \
+  expression_model_store.cpp \
   float_parameter_controller.cpp \
   function.cpp \
   function_app.cpp \
+  function_banner_delegate.cpp \
+  function_curve_parameter_controller.cpp \
   function_expression_cell.cpp \
+  function_graph_controller.cpp \
+  function_graph_view.cpp \
+  function_go_to_parameter_controller.cpp \
+  function_list_controller.cpp \
+  function_store.cpp \
   function_title_cell.cpp \
   global_context.cpp \
   go_to_parameter_controller.cpp \
@@ -31,6 +40,7 @@ app_src += $(addprefix apps/shared/,\
   interval_parameter_controller.cpp \
   language_controller.cpp \
   layout_field_delegate.cpp \
+  list_parameter_controller.cpp \
   margin_even_odd_message_text_cell.cpp \
   memoized_curve_view_range.cpp \
   message_view.cpp \
@@ -43,30 +53,20 @@ app_src += $(addprefix apps/shared/,\
   scrollable_exact_approximate_expressions_view.cpp \
   separator_even_odd_buffer_text_cell.cpp \
   simple_interactive_curve_view_controller.cpp \
-  storage_expression_model_list_controller.cpp \
-  storage_expression_model_store.cpp \
-  storage_function_banner_delegate.cpp \
-  storage_function_curve_parameter_controller.cpp \
-  storage_function_go_to_parameter_controller.cpp \
-  storage_function_graph_controller.cpp \
-  storage_function_graph_view.cpp \
-  storage_function_list_controller.cpp \
-  storage_function_store.cpp \
-  storage_list_parameter_controller.cpp \
-  storage_sum_graph_controller.cpp \
-  storage_values_controller.cpp \
-  storage_values_function_parameter_controller.cpp \
   store_cell.cpp \
   store_context.cpp \
   store_controller.cpp \
   store_parameter_controller.cpp \
   store_selectable_table_view.cpp \
   store_title_cell.cpp \
+  sum_graph_controller.cpp \
   tab_table_controller.cpp \
   text_field_delegate.cpp \
   text_field_delegate_app.cpp \
   text_field_with_extension.cpp \
   toolbox_helpers.cpp \
+  values_controller.cpp \
+  values_function_parameter_controller.cpp \
   values_parameter_controller.cpp \
   vertical_cursor_view.cpp \
   zoom_parameter_controller.cpp \
diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index 51eac961e..b4af0122a 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -1,5 +1,5 @@
 #include "cartesian_function.h"
-#include "storage_expression_model_store.h"
+#include "expression_model_store.h"
 #include "poincare_helpers.h"
 #include <poincare/derivative.h>
 #include <poincare/integral.h>
diff --git a/apps/shared/storage_expression_model_list_controller.cpp b/apps/shared/expression_model_list_controller.cpp
similarity index 83%
rename from apps/shared/storage_expression_model_list_controller.cpp
rename to apps/shared/expression_model_list_controller.cpp
index 021974647..47a145611 100644
--- a/apps/shared/storage_expression_model_list_controller.cpp
+++ b/apps/shared/expression_model_list_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_expression_model_list_controller.h"
+#include "expression_model_list_controller.h"
 #include <apps/constant.h>
 #include <poincare/symbol.h>
 
@@ -8,7 +8,7 @@ static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 /* Table Data Source */
 
-StorageExpressionModelListController::StorageExpressionModelListController(Responder * parentResponder, I18n::Message text) :
+ExpressionModelListController::ExpressionModelListController(Responder * parentResponder, I18n::Message text) :
   ViewController(parentResponder),
   m_addNewModel()
 {
@@ -16,7 +16,7 @@ StorageExpressionModelListController::StorageExpressionModelListController(Respo
   m_addNewModel.setMessage(text);
 }
 
-void StorageExpressionModelListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void ExpressionModelListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   int currentSelectedRow = selectedRow();
 
   // Update m_cumulatedHeightForSelectedIndex if we scrolled one cell up/down
@@ -48,7 +48,7 @@ void StorageExpressionModelListController::tableViewDidChangeSelection(Selectabl
   }
 }
 
-KDCoordinate StorageExpressionModelListController::memoizedRowHeight(int j) {
+KDCoordinate ExpressionModelListController::memoizedRowHeight(int j) {
   if (j < 0) {
     return 0;
   }
@@ -64,7 +64,7 @@ KDCoordinate StorageExpressionModelListController::memoizedRowHeight(int j) {
   return expressionRowHeight(j);
 }
 
-KDCoordinate StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(int j) {
+KDCoordinate ExpressionModelListController::memoizedCumulatedHeightFromIndex(int j) {
   if (j <= 0) {
     return 0;
   }
@@ -99,7 +99,7 @@ KDCoordinate StorageExpressionModelListController::memoizedCumulatedHeightFromIn
   return result;
 }
 
-int StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(KDCoordinate offsetY) {
+int ExpressionModelListController::memoizedIndexFromCumulatedHeight(KDCoordinate offsetY) {
   if (offsetY == 0) {
     return 0;
   }
@@ -134,14 +134,14 @@ int StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(KDCoo
   return notMemoizedIndexFromCumulatedHeight(offsetY);
 }
 
-int StorageExpressionModelListController::numberOfExpressionRows() {
+int ExpressionModelListController::numberOfExpressionRows() {
   if (modelStore()->numberOfModels() == modelStore()->maxNumberOfModels()) {
     return modelStore()->numberOfModels();
   }
   return 1 + modelStore()->numberOfModels();
 }
 
-KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
+KDCoordinate ExpressionModelListController::expressionRowHeight(int j) {
   if (isAddEmptyRow(j)) {
     return Metric::StoreRowHeight;
   }
@@ -154,7 +154,7 @@ KDCoordinate StorageExpressionModelListController::expressionRowHeight(int j) {
   return Metric::StoreRowHeight > modelHeightWithMargins ? Metric::StoreRowHeight : modelHeightWithMargins;
 }
 
-void StorageExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
+void ExpressionModelListController::willDisplayExpressionCellAtIndex(HighlightCell * cell, int j) {
   EvenOddExpressionCell * myCell = (EvenOddExpressionCell *)cell;
   ExpiringPointer<ExpressionModelHandle> m = modelStore()->modelForRecord(modelStore()->recordAtIndex(j));
   myCell->setLayout(m->layout());
@@ -162,7 +162,7 @@ void StorageExpressionModelListController::willDisplayExpressionCellAtIndex(High
 
 /* Responder */
 
-bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::Event event) {
+bool ExpressionModelListController::handleEventOnExpression(Ion::Events::Event event) {
   if (selectedRow() < 0) {
     return false;
   }
@@ -195,7 +195,7 @@ bool StorageExpressionModelListController::handleEventOnExpression(Ion::Events::
   }
   return false;
 }
-void StorageExpressionModelListController::addEmptyModel() {
+void ExpressionModelListController::addEmptyModel() {
   Ion::Storage::Record::ErrorStatus error = modelStore()->addEmptyModel();
   if (error == Ion::Storage::Record::ErrorStatus::NotEnoughSpaceAvailable) {
     return;
@@ -206,14 +206,14 @@ void StorageExpressionModelListController::addEmptyModel() {
   editExpression(Ion::Events::OK);
 }
 
-void StorageExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
+void ExpressionModelListController::reinitSelectedExpression(ExpiringPointer<ExpressionModelHandle> model) {
   model->setContent("");
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
   selectableTableView()->reloadData();
 }
 
-void StorageExpressionModelListController::replaceUnknownSymbolWithReadableSymbol(char * text) {
+void ExpressionModelListController::replaceUnknownSymbolWithReadableSymbol(char * text) {
   size_t textLength = strlen(text);
   char unknownSymb = modelStore()->unknownSymbol();
   char symb = modelStore()->symbol();
@@ -224,7 +224,7 @@ void StorageExpressionModelListController::replaceUnknownSymbolWithReadableSymbo
   }
 }
 
-void StorageExpressionModelListController::editExpression(Ion::Events::Event event) {
+void ExpressionModelListController::editExpression(Ion::Events::Event event) {
   char * initialText = nullptr;
   constexpr int initialTextContentMaxSize = Constant::MaxSerializedExpressionSize;
   char initialTextContent[initialTextContentMaxSize];
@@ -238,7 +238,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
   }
   inputController()->edit(this, event, this, initialText,
       [](void * context, void * sender){
-        StorageExpressionModelListController * myController = static_cast<StorageExpressionModelListController *>(context);
+        ExpressionModelListController * myController = static_cast<ExpressionModelListController *>(context);
         InputViewController * myInputViewController = (InputViewController *)sender;
         const char * textBody = myInputViewController->textBody();
         return myController->editSelectedRecordWithText(textBody);
@@ -248,7 +248,7 @@ void StorageExpressionModelListController::editExpression(Ion::Events::Event eve
       });
 }
 
-bool StorageExpressionModelListController::editSelectedRecordWithText(const char * text) {
+bool ExpressionModelListController::editSelectedRecordWithText(const char * text) {
   // Reset memoization of the selected cell which always corresponds to the k_memoizedCellsCount/2 memoized cell
   resetMemoizationForIndex(k_memoizedCellsCount/2);
   Ion::Storage::Record record = modelStore()->recordAtIndex(modelIndexForRow(selectedRow()));
@@ -256,22 +256,22 @@ bool StorageExpressionModelListController::editSelectedRecordWithText(const char
   return (model->setContent(text) == Ion::Storage::Record::ErrorStatus::None);
 }
 
-bool StorageExpressionModelListController::removeModelRow(Ion::Storage::Record record) {
+bool ExpressionModelListController::removeModelRow(Ion::Storage::Record record) {
   modelStore()->removeModel(record);
   didChangeModelsList();
   return true;
 }
 
-bool StorageExpressionModelListController::isAddEmptyRow(int j) {
+bool ExpressionModelListController::isAddEmptyRow(int j) {
   return j == modelStore()->numberOfModels();
 }
 
-void StorageExpressionModelListController::resetMemoizationForIndex(int index) {
+void ExpressionModelListController::resetMemoizationForIndex(int index) {
   assert(index >= 0 && index < k_memoizedCellsCount);
   m_memoizedCellHeight[index] = k_resetedMemoizedValue;
 }
 
-void StorageExpressionModelListController::shiftMemoization(bool newCellIsUnder) {
+void ExpressionModelListController::shiftMemoization(bool newCellIsUnder) {
   if (newCellIsUnder) {
     for (int i = 0; i < k_memoizedCellsCount - 1; i++) {
       m_memoizedCellHeight[i] = m_memoizedCellHeight[i+1];
@@ -283,7 +283,7 @@ void StorageExpressionModelListController::shiftMemoization(bool newCellIsUnder)
   }
 }
 
-void StorageExpressionModelListController::resetMemoization() {
+void ExpressionModelListController::resetMemoization() {
   m_cumulatedHeightForSelectedIndex = k_resetedMemoizedValue;
   for (int i = 0; i < k_memoizedCellsCount; i++) {
     resetMemoizationForIndex(i);
diff --git a/apps/shared/storage_expression_model_list_controller.h b/apps/shared/expression_model_list_controller.h
similarity index 83%
rename from apps/shared/storage_expression_model_list_controller.h
rename to apps/shared/expression_model_list_controller.h
index b901ead42..9fc00367f 100644
--- a/apps/shared/storage_expression_model_list_controller.h
+++ b/apps/shared/expression_model_list_controller.h
@@ -1,15 +1,15 @@
-#ifndef SHARED_STORAGE_EXPRESSION_MODEL_LIST_CONTROLLER_H
-#define SHARED_STORAGE_EXPRESSION_MODEL_LIST_CONTROLLER_H
+#ifndef SHARED_EXPRESSION_MODEL_LIST_CONTROLLER_H
+#define SHARED_EXPRESSION_MODEL_LIST_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_expression_model_store.h"
+#include "expression_model_store.h"
 #include <apps/i18n.h>
 
 namespace Shared {
 
-class StorageExpressionModelListController : public ViewController, public SelectableTableViewDataSource, public SelectableTableViewDelegate {
+class ExpressionModelListController : public ViewController, public SelectableTableViewDataSource, public SelectableTableViewDelegate {
 public:
-  StorageExpressionModelListController(Responder * parentResponder, I18n::Message text);
+  ExpressionModelListController(Responder * parentResponder, I18n::Message text);
 protected:
   static constexpr KDCoordinate k_expressionMargin = 5;
   // SelectableTableViewDelegate
@@ -34,7 +34,7 @@ protected:
   virtual bool isAddEmptyRow(int j);
   // ViewController
   virtual SelectableTableView * selectableTableView() = 0;
-  virtual StorageExpressionModelStore * modelStore() = 0;
+  virtual ExpressionModelStore * modelStore() = 0;
   virtual InputViewController * inputController() = 0;
   // Memoization
   static constexpr int k_memoizedCellsCount = 7;
@@ -48,7 +48,7 @@ protected:
    * (ScreenHeight - Metric::TitleBarHeight - Metric::TabHeight - ButtonRowHeight
    * - currentSelectedRowHeight) / Metric::StoreRowHeight
    *   =  (240-18-27-20-50)/50 = 2.5 */
-  static_assert(StorageExpressionModelListController::k_memoizedCellsCount % 2 == 1, "StorageExpressionModelListController::k_memoizedCellsCount should be odd.");
+  static_assert(ExpressionModelListController::k_memoizedCellsCount % 2 == 1, "ExpressionModelListController::k_memoizedCellsCount should be odd.");
   /* We memoize values for indexes around the selectedRow index.
    * k_memoizedCellsCount needs to be odd to compute things such as:
    * constexpr int halfMemoizationCount = k_memoizedCellsCount/2;
diff --git a/apps/shared/storage_expression_model_store.cpp b/apps/shared/expression_model_store.cpp
similarity index 68%
rename from apps/shared/storage_expression_model_store.cpp
rename to apps/shared/expression_model_store.cpp
index 2a385730c..eee7cb969 100644
--- a/apps/shared/storage_expression_model_store.cpp
+++ b/apps/shared/expression_model_store.cpp
@@ -1,21 +1,21 @@
-#include "storage_expression_model_store.h"
+#include "expression_model_store.h"
 
 namespace Shared {
 
-StorageExpressionModelStore::StorageExpressionModelStore() :
+ExpressionModelStore::ExpressionModelStore() :
   m_oldestMemoizedIndex(0)
 {
 }
 
-int StorageExpressionModelStore::numberOfModels() const {
+int ExpressionModelStore::numberOfModels() const {
   return Ion::Storage::sharedStorage()->numberOfRecordsWithExtension(modelExtension());
 }
 
-Ion::Storage::Record StorageExpressionModelStore::recordAtIndex(int i) const {
+Ion::Storage::Record ExpressionModelStore::recordAtIndex(int i) const {
   return Ion::Storage::sharedStorage()->recordWithExtensionAtIndex(modelExtension(), i);
 }
 
-ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
+ExpressionModelHandle * ExpressionModelStore::privateModelForRecord(Ion::Storage::Record record) const {
   for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (!memoizedModelAtIndex(i)->isNull() && *memoizedModelAtIndex(i) == record) {
       return memoizedModelAtIndex(i);
@@ -28,20 +28,20 @@ ExpressionModelHandle * StorageExpressionModelStore::privateModelForRecord(Ion::
 }
 
 
-void StorageExpressionModelStore::removeAll() {
+void ExpressionModelStore::removeAll() {
   Ion::Storage::sharedStorage()->destroyRecordsWithExtension(modelExtension());
 }
 
-void StorageExpressionModelStore::removeModel(Ion::Storage::Record record) {
+void ExpressionModelStore::removeModel(Ion::Storage::Record record) {
   assert(!record.isNull());
   record.destroy();
 }
 
-void StorageExpressionModelStore::tidy() {
+void ExpressionModelStore::tidy() {
   resetMemoizedModelsExceptRecord();
 }
 
-int StorageExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) const {
+int ExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) const {
   int result = 0;
   int i = 0;
   ExpressionModelHandle * m = privateModelForRecord(recordAtIndex(i++));
@@ -54,7 +54,7 @@ int StorageExpressionModelStore::numberOfModelsSatisfyingTest(ModelTest test) co
   return result;
 }
 
-Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(int i, ModelTest test) const {
+Ion::Storage::Record ExpressionModelStore::recordStatifyingTestAtIndex(int i, ModelTest test) const {
   assert(i >= 0 && i < numberOfDefinedModels());
   int index = 0;
   int currentModelIndex = 0;
@@ -75,7 +75,7 @@ Ion::Storage::Record StorageExpressionModelStore::recordStatifyingTestAtIndex(in
   return Ion::Storage::Record();
 }
 
-void StorageExpressionModelStore::resetMemoizedModelsExceptRecord(const Ion::Storage::Record record) const {
+void ExpressionModelStore::resetMemoizedModelsExceptRecord(const Ion::Storage::Record record) const {
   Ion::Storage::Record emptyRecord;
   for (int i = 0; i < maxNumberOfMemoizedModels(); i++) {
     if (*memoizedModelAtIndex(i) != record) {
diff --git a/apps/shared/storage_expression_model_store.h b/apps/shared/expression_model_store.h
similarity index 91%
rename from apps/shared/storage_expression_model_store.h
rename to apps/shared/expression_model_store.h
index 9d5e40ce4..a280bf7e7 100644
--- a/apps/shared/storage_expression_model_store.h
+++ b/apps/shared/expression_model_store.h
@@ -1,5 +1,5 @@
-#ifndef SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
-#define SHARED_STORAGE_EXPRESSION_MODEL_STORE_H
+#ifndef SHARED_EXPRESSION_MODEL_STORE_H
+#define SHARED_EXPRESSION_MODEL_STORE_H
 
 #include "expression_model_handle.h"
 #include "expiring_pointer.h"
@@ -8,12 +8,12 @@
 
 namespace Shared {
 
-// StorageExpressionModelStore is a handle to Ion::Storage::sharedStorage()
+// ExpressionModelStore is a handle to Ion::Storage::sharedStorage()
 
-class StorageExpressionModelStore {
+class ExpressionModelStore {
   // TODO find better name (once we remove ExpressionModelStore?)
 public:
-  StorageExpressionModelStore();
+  ExpressionModelStore();
   virtual char symbol() const { return 0; }
   virtual char unknownSymbol() const { return 0; }
 
diff --git a/apps/shared/function_app.h b/apps/shared/function_app.h
index b9c784480..421e74f0f 100644
--- a/apps/shared/function_app.h
+++ b/apps/shared/function_app.h
@@ -1,8 +1,8 @@
-#ifndef SHARED_STORAGE_FUNCTION_APP_H
-#define SHARED_STORAGE_FUNCTION_APP_H
+#ifndef SHARED_FUNCTION_APP_H
+#define SHARED_FUNCTION_APP_H
 
 #include "expression_field_delegate_app.h"
-#include "storage_function_store.h"
+#include "function_store.h"
 #include "curve_view_cursor.h"
 #include "interval.h"
 
diff --git a/apps/shared/storage_function_banner_delegate.cpp b/apps/shared/function_banner_delegate.cpp
similarity index 97%
rename from apps/shared/storage_function_banner_delegate.cpp
rename to apps/shared/function_banner_delegate.cpp
index 381e07d49..5775174ad 100644
--- a/apps/shared/storage_function_banner_delegate.cpp
+++ b/apps/shared/function_banner_delegate.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_banner_delegate.h"
+#include "function_banner_delegate.h"
 #include "poincare_helpers.h"
 #include "../constant.h"
 
diff --git a/apps/shared/storage_function_banner_delegate.h b/apps/shared/function_banner_delegate.h
similarity index 73%
rename from apps/shared/storage_function_banner_delegate.h
rename to apps/shared/function_banner_delegate.h
index b0edcbf7c..ceee40b08 100644
--- a/apps/shared/storage_function_banner_delegate.h
+++ b/apps/shared/function_banner_delegate.h
@@ -1,7 +1,7 @@
-#ifndef SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H
-#define SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H
+#ifndef SHARED_FUNCTION_BANNER_DELEGATE_H
+#define SHARED_FUNCTION_BANNER_DELEGATE_H
 
-#include "storage_function_store.h"
+#include "function_store.h"
 #include "banner_view.h"
 #include "curve_view_cursor.h"
 
diff --git a/apps/shared/storage_function_curve_parameter_controller.cpp b/apps/shared/function_curve_parameter_controller.cpp
similarity index 94%
rename from apps/shared/storage_function_curve_parameter_controller.cpp
rename to apps/shared/function_curve_parameter_controller.cpp
index 14a71658a..797dbe669 100644
--- a/apps/shared/storage_function_curve_parameter_controller.cpp
+++ b/apps/shared/function_curve_parameter_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_curve_parameter_controller.h"
+#include "function_curve_parameter_controller.h"
 #include <assert.h>
 
 namespace Shared {
diff --git a/apps/shared/storage_function_curve_parameter_controller.h b/apps/shared/function_curve_parameter_controller.h
similarity index 81%
rename from apps/shared/storage_function_curve_parameter_controller.h
rename to apps/shared/function_curve_parameter_controller.h
index 02c6236fa..2030cbd5b 100644
--- a/apps/shared/storage_function_curve_parameter_controller.h
+++ b/apps/shared/function_curve_parameter_controller.h
@@ -1,8 +1,8 @@
-#ifndef SHARED_STORAGE_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
-#define SHARED_STORAGE_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
+#ifndef SHARED_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
+#define SHARED_FUNCTION_CURVE_PARAMETER_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function_go_to_parameter_controller.h"
+#include "function_go_to_parameter_controller.h"
 #include "curve_view_cursor.h"
 #include "interactive_curve_view_range.h"
 
diff --git a/apps/shared/storage_function_go_to_parameter_controller.cpp b/apps/shared/function_go_to_parameter_controller.cpp
similarity index 96%
rename from apps/shared/storage_function_go_to_parameter_controller.cpp
rename to apps/shared/function_go_to_parameter_controller.cpp
index 178d0e312..a4e8ede5d 100644
--- a/apps/shared/storage_function_go_to_parameter_controller.cpp
+++ b/apps/shared/function_go_to_parameter_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_go_to_parameter_controller.h"
+#include "function_go_to_parameter_controller.h"
 #include "function_app.h"
 #include <assert.h>
 #include <cmath>
diff --git a/apps/shared/storage_function_go_to_parameter_controller.h b/apps/shared/function_go_to_parameter_controller.h
similarity index 83%
rename from apps/shared/storage_function_go_to_parameter_controller.h
rename to apps/shared/function_go_to_parameter_controller.h
index c06157225..997d12af2 100644
--- a/apps/shared/storage_function_go_to_parameter_controller.h
+++ b/apps/shared/function_go_to_parameter_controller.h
@@ -1,5 +1,5 @@
-#ifndef SHARED_STORAGE_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
-#define SHARED_STORAGE_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
+#ifndef SHARED_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
+#define SHARED_FUNCTION_GO_TO_PARAMETER_CONTROLLER_H
 
 #include "go_to_parameter_controller.h"
 #include "function.h"
diff --git a/apps/shared/storage_function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
similarity index 99%
rename from apps/shared/storage_function_graph_controller.cpp
rename to apps/shared/function_graph_controller.cpp
index 9263144f9..4971f5bfc 100644
--- a/apps/shared/storage_function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_graph_controller.h"
+#include "function_graph_controller.h"
 #include "function_app.h"
 #include <assert.h>
 #include <cmath>
diff --git a/apps/shared/storage_function_graph_controller.h b/apps/shared/function_graph_controller.h
similarity index 90%
rename from apps/shared/storage_function_graph_controller.h
rename to apps/shared/function_graph_controller.h
index e6b8faa92..a88f90268 100644
--- a/apps/shared/storage_function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -1,13 +1,13 @@
-#ifndef SHARED_STORAGE_FUNCTION_GRAPH_CONTROLLER_H
-#define SHARED_STORAGE_FUNCTION_GRAPH_CONTROLLER_H
+#ifndef SHARED_FUNCTION_GRAPH_CONTROLLER_H
+#define SHARED_FUNCTION_GRAPH_CONTROLLER_H
 
 #include <escher.h>
 #include "initialisation_parameter_controller.h"
-#include "storage_function_banner_delegate.h"
+#include "function_banner_delegate.h"
 #include "interactive_curve_view_controller.h"
-#include "storage_function_store.h"
-#include "storage_function_graph_view.h"
-#include "storage_function_curve_parameter_controller.h"
+#include "function_store.h"
+#include "function_graph_view.h"
+#include "function_curve_parameter_controller.h"
 
 namespace Shared {
 
diff --git a/apps/shared/storage_function_graph_view.cpp b/apps/shared/function_graph_view.cpp
similarity index 98%
rename from apps/shared/storage_function_graph_view.cpp
rename to apps/shared/function_graph_view.cpp
index 045809587..db677c316 100644
--- a/apps/shared/storage_function_graph_view.cpp
+++ b/apps/shared/function_graph_view.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_graph_view.h"
+#include "function_graph_view.h"
 #include <assert.h>
 #include <cmath>
 #include <float.h>
diff --git a/apps/shared/storage_function_graph_view.h b/apps/shared/function_graph_view.h
similarity index 92%
rename from apps/shared/storage_function_graph_view.h
rename to apps/shared/function_graph_view.h
index fb2986443..1a8275f8c 100644
--- a/apps/shared/storage_function_graph_view.h
+++ b/apps/shared/function_graph_view.h
@@ -1,5 +1,5 @@
-#ifndef SHARED_STORAGE_FUNCTION_GRAPH_VIEW_H
-#define SHARED_STORAGE_FUNCTION_GRAPH_VIEW_H
+#ifndef SHARED_FUNCTION_GRAPH_VIEW_H
+#define SHARED_FUNCTION_GRAPH_VIEW_H
 
 #include <escher.h>
 #include "curve_view.h"
diff --git a/apps/shared/storage_function_list_controller.cpp b/apps/shared/function_list_controller.cpp
similarity index 95%
rename from apps/shared/storage_function_list_controller.cpp
rename to apps/shared/function_list_controller.cpp
index b0825f2c9..89f65655c 100644
--- a/apps/shared/storage_function_list_controller.cpp
+++ b/apps/shared/function_list_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_list_controller.h"
+#include "function_list_controller.h"
 #include "function_app.h"
 #include "function_expression_cell.h"
 
@@ -8,7 +8,7 @@ static inline int maxInt(int x, int y) { return x > y ? x : y; }
 static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 FunctionListController::FunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
-  StorageExpressionModelListController(parentResponder, text),
+  ExpressionModelListController(parentResponder, text),
   ButtonRowDelegate(header, footer),
   m_selectableTableView(this, this, this, this),
   m_emptyCell(),
@@ -27,7 +27,7 @@ FunctionListController::FunctionListController(Responder * parentResponder, Butt
   m_titlesColumnWidth(k_minTitleColumnWidth)
 {
   /* m_memoizedCellBaseline is not initialized by the call to
-   * resetMemoizationForIndex in StorageExpressionModelListController's
+   * resetMemoizationForIndex in ExpressionModelListController's
    * constructor, because it is a virtual method in a constructor. */
   for (int i = 0; i < k_memoizedCellsCount; i++) {
     m_memoizedCellBaseline[i] = -1;
@@ -217,7 +217,7 @@ void FunctionListController::willExitResponderChain(Responder * nextFirstRespond
 
 void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   // Update memoization of cell heights
-  StorageExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY);
+  ExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY);
   // Do not select the cell left of the "addEmptyFunction" cell
   if (isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
     t->selectCellAtLocation(1, numberOfRows()-1);
@@ -273,7 +273,7 @@ KDCoordinate FunctionListController::maxFunctionNameWidth() {
 }
 
 void FunctionListController::didChangeModelsList() {
-  StorageExpressionModelListController::didChangeModelsList();
+  ExpressionModelListController::didChangeModelsList();
   computeTitlesColumnWidth();
 }
 
@@ -296,7 +296,7 @@ KDCoordinate FunctionListController::baseline(int j) {
 void FunctionListController::resetMemoizationForIndex(int index) {
   assert(index >= 0 && index < k_memoizedCellsCount);
   m_memoizedCellBaseline[index] = -1;
-  StorageExpressionModelListController::resetMemoizationForIndex(index);
+  ExpressionModelListController::resetMemoizationForIndex(index);
 }
 
 void FunctionListController::shiftMemoization(bool newCellIsUnder) {
@@ -309,7 +309,7 @@ void FunctionListController::shiftMemoization(bool newCellIsUnder) {
       m_memoizedCellBaseline[i] = m_memoizedCellBaseline[i-1];
     }
   }
-  StorageExpressionModelListController::shiftMemoization(newCellIsUnder);
+  ExpressionModelListController::shiftMemoization(newCellIsUnder);
 }
 
 KDCoordinate FunctionListController::nameWidth(int nameLength) const {
diff --git a/apps/shared/storage_function_list_controller.h b/apps/shared/function_list_controller.h
similarity index 82%
rename from apps/shared/storage_function_list_controller.h
rename to apps/shared/function_list_controller.h
index 9e77869e7..273edd401 100644
--- a/apps/shared/storage_function_list_controller.h
+++ b/apps/shared/function_list_controller.h
@@ -1,16 +1,16 @@
-#ifndef SHARED_STORAGE_FUNCTION_LIST_CONTROLLER_H
-#define SHARED_STORAGE_FUNCTION_LIST_CONTROLLER_H
+#ifndef SHARED_FUNCTION_LIST_CONTROLLER_H
+#define SHARED_FUNCTION_LIST_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function_store.h"
+#include "function_store.h"
 #include "function_title_cell.h"
-#include "storage_list_parameter_controller.h"
-#include "storage_expression_model_list_controller.h"
+#include "list_parameter_controller.h"
+#include "expression_model_list_controller.h"
 #include <apps/i18n.h>
 
 namespace Shared {
 
-class FunctionListController : public StorageExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource {
+class FunctionListController : public ExpressionModelListController, public ButtonRowDelegate, public TableViewDataSource {
 public:
   FunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text);
 
@@ -19,9 +19,9 @@ public:
 
   /* TableViewDataSource */
   int numberOfRows() override { return this->numberOfExpressionRows(); }
-  KDCoordinate rowHeight(int j) override { return StorageExpressionModelListController::memoizedRowHeight(j); }
-  KDCoordinate cumulatedHeightFromIndex(int j) override { return StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
-  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
+  KDCoordinate rowHeight(int j) override { return ExpressionModelListController::memoizedRowHeight(j); }
+  KDCoordinate cumulatedHeightFromIndex(int j) override { return ExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
+  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return ExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
   int numberOfColumns() override { return 2; }
   KDCoordinate columnWidth(int i) override;
   KDCoordinate cumulatedWidthFromIndex(int i) override;
@@ -72,7 +72,7 @@ private:
   int notMemoizedIndexFromCumulatedHeight(KDCoordinate offsetY) override {
     return TableViewDataSource::indexFromCumulatedHeight(offsetY);
   }
-  virtual StorageListParameterController * parameterController() = 0;
+  virtual ListParameterController * parameterController() = 0;
   virtual int maxNumberOfDisplayableRows() = 0;
   virtual FunctionTitleCell * titleCells(int index) = 0;
   virtual HighlightCell * expressionCells(int index) = 0;
diff --git a/apps/shared/storage_function_store.cpp b/apps/shared/function_store.cpp
similarity index 82%
rename from apps/shared/storage_function_store.cpp
rename to apps/shared/function_store.cpp
index 143767c2e..19f22d555 100644
--- a/apps/shared/storage_function_store.cpp
+++ b/apps/shared/function_store.cpp
@@ -1,4 +1,4 @@
-#include "storage_function_store.h"
+#include "function_store.h"
 #include "cartesian_function.h"
 #include <assert.h>
 
diff --git a/apps/shared/storage_function_store.h b/apps/shared/function_store.h
similarity index 76%
rename from apps/shared/storage_function_store.h
rename to apps/shared/function_store.h
index f5f15ff05..6ce56f82d 100644
--- a/apps/shared/storage_function_store.h
+++ b/apps/shared/function_store.h
@@ -1,17 +1,17 @@
-#ifndef SHARED_STORAGE_FUNCTION_STORE_H
-#define SHARED_STORAGE_FUNCTION_STORE_H
+#ifndef SHARED_FUNCTION_STORE_H
+#define SHARED_FUNCTION_STORE_H
 
 #include "function.h"
-#include "storage_expression_model_store.h"
+#include "expression_model_store.h"
 #include <stdint.h>
 
 namespace Shared {
 
 /* FunctionStore storse functions and gives them a color. */
 
-class FunctionStore : public StorageExpressionModelStore {
+class FunctionStore : public ExpressionModelStore {
 public:
-  FunctionStore() : StorageExpressionModelStore() {}
+  FunctionStore() : ExpressionModelStore() {}
   uint32_t storeChecksum();
   // An active function must be defined to be counted
   int numberOfActiveFunctions() const { return numberOfModelsSatisfyingTest([](ExpressionModelHandle * m) { return m->isDefined() && static_cast<Function *>(m)->isActive(); }); }
diff --git a/apps/shared/storage_list_parameter_controller.cpp b/apps/shared/list_parameter_controller.cpp
similarity index 67%
rename from apps/shared/storage_list_parameter_controller.cpp
rename to apps/shared/list_parameter_controller.cpp
index f2b3eeda7..62f988d50 100644
--- a/apps/shared/storage_list_parameter_controller.cpp
+++ b/apps/shared/list_parameter_controller.cpp
@@ -1,10 +1,10 @@
-#include "storage_list_parameter_controller.h"
+#include "list_parameter_controller.h"
 #include "function_app.h"
 #include <assert.h>
 
 namespace Shared {
 
-StorageListParameterController::StorageListParameterController(Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate) :
+ListParameterController::ListParameterController(Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate) :
   ViewController(parentResponder),
   m_selectableTableView(this, this, this, tableDelegate),
   m_record(),
@@ -16,15 +16,15 @@ StorageListParameterController::StorageListParameterController(Responder * paren
 {
 }
 
-const char * StorageListParameterController::title() {
+const char * ListParameterController::title() {
   return I18n::translate(I18n::Message::FunctionOptions);
 }
 
-void StorageListParameterController::didBecomeFirstResponder() {
+void ListParameterController::didBecomeFirstResponder() {
   app()->setFirstResponder(&m_selectableTableView);
 }
 
-void StorageListParameterController::viewWillAppear() {
+void ListParameterController::viewWillAppear() {
   ViewController::viewWillAppear();
   if (selectedRow() == -1) {
     selectCellAtLocation(0, 0);
@@ -34,26 +34,26 @@ void StorageListParameterController::viewWillAppear() {
   m_selectableTableView.reloadData();
 }
 
-void StorageListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
+void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
   if (cell == &m_enableCell) {
     SwitchView * switchView = (SwitchView *)m_enableCell.accessoryView();
     switchView->setState(function()->isActive());
   }
 }
 
-void StorageListParameterController::setRecord(Ion::Storage::Record record) {
+void ListParameterController::setRecord(Ion::Storage::Record record) {
   m_record = record;
   selectCellAtLocation(0, 0);
 }
 
-bool StorageListParameterController::handleEvent(Ion::Events::Event event) {
+bool ListParameterController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::OK || event == Ion::Events::EXE) {
     return handleEnterOnRow(selectedRow());
   }
   return false;
 }
 
-HighlightCell * StorageListParameterController::reusableCell(int index) {
+HighlightCell * ListParameterController::reusableCell(int index) {
   assert(index >= 0);
   assert(index < totalNumberOfCells());
 #if FUNCTION_COLOR_CHOICE
@@ -64,7 +64,7 @@ HighlightCell * StorageListParameterController::reusableCell(int index) {
   return cells[index];
 }
 
-bool StorageListParameterController::handleEnterOnRow(int rowIndex) {
+bool ListParameterController::handleEnterOnRow(int rowIndex) {
   switch (rowIndex) {
 #if FUNCTION_COLOR_CHOICE
     case 0:
@@ -94,11 +94,11 @@ bool StorageListParameterController::handleEnterOnRow(int rowIndex) {
   }
 }
 
-ExpiringPointer<Function> StorageListParameterController::function() {
+ExpiringPointer<Function> ListParameterController::function() {
   return functionStore()->modelForRecord(m_record);
 }
 
-FunctionStore * StorageListParameterController::functionStore() {
+FunctionStore * ListParameterController::functionStore() {
   FunctionApp * a = static_cast<FunctionApp *>(app());
   return a->functionStore();
 }
diff --git a/apps/shared/storage_list_parameter_controller.h b/apps/shared/list_parameter_controller.h
similarity index 72%
rename from apps/shared/storage_list_parameter_controller.h
rename to apps/shared/list_parameter_controller.h
index f039db41b..ea2992089 100644
--- a/apps/shared/storage_list_parameter_controller.h
+++ b/apps/shared/list_parameter_controller.h
@@ -1,15 +1,15 @@
-#ifndef SHARED_STORAGE_LIST_PARAM_CONTROLLER_H
-#define SHARED_STORAGE_LIST_PARAM_CONTROLLER_H
+#ifndef SHARED_LIST_PARAM_CONTROLLER_H
+#define SHARED_LIST_PARAM_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function_store.h"
+#include "function_store.h"
 #include <apps/i18n.h>
 
 namespace Shared {
 
-class StorageListParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class ListParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  StorageListParameterController(Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr);
+  ListParameterController(Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr);
 
   View * view() override { return &m_selectableTableView; }
   const char * title() override;
diff --git a/apps/shared/storage_sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
similarity index 84%
rename from apps/shared/storage_sum_graph_controller.cpp
rename to apps/shared/sum_graph_controller.cpp
index e0b92e3e9..c2e79a7be 100644
--- a/apps/shared/storage_sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_sum_graph_controller.h"
+#include "sum_graph_controller.h"
 #include "function_app.h"
 #include "../apps_container.h"
 #include <poincare_layouts.h>
@@ -13,7 +13,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageSumGraphController::StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
+SumGraphController::SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
   SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
   m_step(Step::FirstParameter),
   m_startSum(NAN),
@@ -26,7 +26,7 @@ StorageSumGraphController::StorageSumGraphController(Responder * parentResponder
 {
 }
 
-void StorageSumGraphController::viewWillAppear() {
+void SumGraphController::viewWillAppear() {
   m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
   m_graphView->setBannerView(&m_legendView);
   m_graphView->setCursorView(&m_cursorView);
@@ -45,11 +45,11 @@ void StorageSumGraphController::viewWillAppear() {
 }
 
 
-void StorageSumGraphController::didEnterResponderChain(Responder * previousFirstResponder) {
+void SumGraphController::didEnterResponderChain(Responder * previousFirstResponder) {
   app()->setFirstResponder(m_legendView.textField());
 }
 
-bool StorageSumGraphController::handleEvent(Ion::Events::Event event) {
+bool SumGraphController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Plus || event == Ion::Events::Minus) {
     return handleZoom(event);
   }
@@ -100,7 +100,7 @@ bool StorageSumGraphController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-bool StorageSumGraphController::moveCursorHorizontallyToPosition(double x) {
+bool SumGraphController::moveCursorHorizontallyToPosition(double x) {
   FunctionApp * myApp = static_cast<FunctionApp *>(app());
   assert(!m_record.isNull());
   ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
@@ -119,12 +119,12 @@ bool StorageSumGraphController::moveCursorHorizontallyToPosition(double x) {
   return true;
 }
 
-void StorageSumGraphController::setRecord(Ion::Storage::Record record) {
+void SumGraphController::setRecord(Ion::Storage::Record record) {
   m_graphView->selectRecord(record);
   m_record = record;
 }
 
-bool StorageSumGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
   AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
   Context * globalContext = appsContainer->globalContext();
   double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
@@ -145,7 +145,7 @@ bool StorageSumGraphController::textFieldDidFinishEditing(TextField * textField,
   return false;
 }
 
-bool StorageSumGraphController::textFieldDidAbortEditing(TextField * textField) {
+bool SumGraphController::textFieldDidAbortEditing(TextField * textField) {
   char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
   double parameter = NAN;
   switch(m_step) {
@@ -163,7 +163,7 @@ bool StorageSumGraphController::textFieldDidAbortEditing(TextField * textField)
   return true;
 }
 
-bool StorageSumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
+bool SumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
   if ((event == Ion::Events::OK || event == Ion::Events::EXE) && !textField->isEditing()) {
     return handleEnter();
   }
@@ -173,7 +173,7 @@ bool StorageSumGraphController::textFieldDidReceiveEvent(TextField * textField,
   return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
 }
 
-bool StorageSumGraphController::handleEnter() {
+bool SumGraphController::handleEnter() {
   if (m_step == Step::Result) {
     StackViewController * stack = (StackViewController *)parentResponder();
     stack->pop();
@@ -203,7 +203,7 @@ bool StorageSumGraphController::handleEnter() {
 
 /* Legend View */
 
-StorageSumGraphController::LegendView::LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
+SumGraphController::LegendView::LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
   m_sum(0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_sumLayout(),
   m_legend(k_font, I18n::Message::Default, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
@@ -213,26 +213,26 @@ StorageSumGraphController::LegendView::LegendView(StorageSumGraphController * co
   m_draftText[0] = 0;
 }
 
-void StorageSumGraphController::LegendView::drawRect(KDContext * ctx, KDRect rect) const {
+void SumGraphController::LegendView::drawRect(KDContext * ctx, KDRect rect) const {
   ctx->fillRect(bounds(), Palette::GreyMiddle);
 }
 
-KDSize StorageSumGraphController::LegendView::minimalSizeForOptimalDisplay() const {
+KDSize SumGraphController::LegendView::minimalSizeForOptimalDisplay() const {
   return KDSize(0, k_legendHeight);
 }
 
-void StorageSumGraphController::LegendView::setLegendMessage(I18n::Message message, Step step) {
+void SumGraphController::LegendView::setLegendMessage(I18n::Message message, Step step) {
   m_legend.setMessage(message);
   layoutSubviews(step);
 }
 
-void StorageSumGraphController::LegendView::setEditableZone(double d) {
+void SumGraphController::LegendView::setEditableZone(double d) {
   char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
   PrintFloat::convertFloatToText<double>(d, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
  m_editableZone.setText(buffer);
 }
 
-void StorageSumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
+void SumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
   constexpr int sigmaLength = 2;
   const CodePoint sigma[sigmaLength] = {UCodePointSpace, m_sumSymbol};
@@ -271,11 +271,11 @@ void StorageSumGraphController::LegendView::setSumSymbol(Step step, double start
   layoutSubviews(step);
 }
 
-int StorageSumGraphController::LegendView::numberOfSubviews() const {
+int SumGraphController::LegendView::numberOfSubviews() const {
   return 3;
 }
 
-View * StorageSumGraphController::LegendView::subviewAtIndex(int index) {
+View * SumGraphController::LegendView::subviewAtIndex(int index) {
   assert(index >= 0 && index < 3);
   if (index == 0) {
     return &m_sum;
@@ -286,11 +286,11 @@ View * StorageSumGraphController::LegendView::subviewAtIndex(int index) {
   return &m_legend;
 }
 
-void StorageSumGraphController::LegendView::layoutSubviews() {
+void SumGraphController::LegendView::layoutSubviews() {
   layoutSubviews(Step::FirstParameter);
 }
 
-void StorageSumGraphController::LegendView::layoutSubviews(Step step) {
+void SumGraphController::LegendView::layoutSubviews(Step step) {
   KDCoordinate width = bounds().width();
   KDCoordinate heigth = bounds().height();
   KDSize legendSize = m_legend.minimalSizeForOptimalDisplay();
diff --git a/apps/shared/storage_sum_graph_controller.h b/apps/shared/sum_graph_controller.h
similarity index 85%
rename from apps/shared/storage_sum_graph_controller.h
rename to apps/shared/sum_graph_controller.h
index f8224b127..9e69a3d30 100644
--- a/apps/shared/storage_sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -1,8 +1,8 @@
-#ifndef SHARED_STORAGE_SUM_GRAPH_CONTROLLER_H
-#define SHARED_STORAGE_SUM_GRAPH_CONTROLLER_H
+#ifndef SHARED_SUM_GRAPH_CONTROLLER_H
+#define SHARED_SUM_GRAPH_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function_graph_view.h"
+#include "function_graph_view.h"
 #include "interactive_curve_view_range.h"
 #include "vertical_cursor_view.h"
 #include "curve_view_cursor.h"
@@ -13,9 +13,9 @@
 
 namespace Shared {
 
-class StorageSumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
+class SumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
 public:
-  StorageSumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
+  SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
   void viewWillAppear() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
   bool handleEvent(Ion::Events::Event event) override;
@@ -49,7 +49,7 @@ private:
   bool handleEnter() override;
   class LegendView : public View {
   public:
-    LegendView(StorageSumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
+    LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
     LegendView(const LegendView& other) = delete;
     LegendView(LegendView&& other) = delete;
     LegendView& operator=(const LegendView& other) = delete;
diff --git a/apps/shared/storage_values_controller.cpp b/apps/shared/values_controller.cpp
similarity index 74%
rename from apps/shared/storage_values_controller.cpp
rename to apps/shared/values_controller.cpp
index 7ab7f2839..994e6752a 100644
--- a/apps/shared/storage_values_controller.cpp
+++ b/apps/shared/values_controller.cpp
@@ -1,4 +1,4 @@
-#include "storage_values_controller.h"
+#include "values_controller.h"
 #include "function_app.h"
 #include "../constant.h"
 #include "../apps_container.h"
@@ -9,7 +9,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-StorageValuesController::StorageValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval) :
+ValuesController::ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval) :
   EditableCellTableViewController(parentResponder),
   ButtonRowDelegate(header, nullptr),
   m_interval(interval),
@@ -20,7 +20,7 @@ StorageValuesController::StorageValuesController(Responder * parentResponder, In
   m_abscissaCells{},
   m_abscissaParameterController(this, intervalParameterController, parameterTitle),
   m_setIntervalButton(this, I18n::Message::IntervalSet, Invocation([](void * context, void * sender) {
-    StorageValuesController * valuesController = (StorageValuesController *) context;
+    ValuesController * valuesController = (ValuesController *) context;
     StackViewController * stack = ((StackViewController *)valuesController->stackController());
     stack->push(valuesController->intervalParameterController());
     return true;
@@ -41,11 +41,11 @@ StorageValuesController::StorageValuesController(Responder * parentResponder, In
   }
 }
 
-const char * StorageValuesController::title() {
+const char * ValuesController::title() {
   return I18n::translate(I18n::Message::ValuesTab);
 }
 
-int StorageValuesController::numberOfColumns() {
+int ValuesController::numberOfColumns() {
   if (m_numberOfColumnsNeedUpdate) {
     updateNumberOfColumns();
     m_numberOfColumnsNeedUpdate = false;
@@ -53,11 +53,11 @@ int StorageValuesController::numberOfColumns() {
   return m_numberOfColumns;
 }
 
-Interval * StorageValuesController::interval() {
+Interval * ValuesController::interval() {
   return m_interval;
 }
 
-bool StorageValuesController::handleEvent(Ion::Events::Event event) {
+bool ValuesController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Down) {
     if (selectedRow() == -1) {
       header()->setSelectedButton(-1);
@@ -104,7 +104,7 @@ bool StorageValuesController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-void StorageValuesController::didBecomeFirstResponder() {
+void ValuesController::didBecomeFirstResponder() {
   EditableCellTableViewController::didBecomeFirstResponder();
   if (selectedRow() == -1) {
     selectableTableView()->deselectTable();
@@ -114,7 +114,7 @@ void StorageValuesController::didBecomeFirstResponder() {
   }
 }
 
-void StorageValuesController::willExitResponderChain(Responder * nextFirstResponder) {
+void ValuesController::willExitResponderChain(Responder * nextFirstResponder) {
   if (nextFirstResponder == tabController()) {
     selectableTableView()->deselectTable();
     selectableTableView()->scrollToCell(0,0);
@@ -122,18 +122,18 @@ void StorageValuesController::willExitResponderChain(Responder * nextFirstRespon
   }
 }
 
-int StorageValuesController::numberOfButtons(ButtonRowController::Position) const {
+int ValuesController::numberOfButtons(ButtonRowController::Position) const {
   if (isEmpty()) {
     return 0;
   }
   return 1;
 }
 
-Button * StorageValuesController::buttonAtIndex(int index, ButtonRowController::Position position) const {
+Button * ValuesController::buttonAtIndex(int index, ButtonRowController::Position position) const {
   return (Button *)&m_setIntervalButton;
 }
 
-void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
+void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
   willDisplayCellAtLocationWithDisplayMode(cell, i, j, Preferences::sharedPreferences()->displayMode());
   if (cellAtLocationIsEditable(i, j)) {
     return;
@@ -159,7 +159,7 @@ void StorageValuesController::willDisplayCellAtLocation(HighlightCell * cell, in
   }
 }
 
-KDCoordinate StorageValuesController::columnWidth(int i) {
+KDCoordinate ValuesController::columnWidth(int i) {
   switch (i) {
     case 0:
       return k_abscissaCellWidth;
@@ -168,7 +168,7 @@ KDCoordinate StorageValuesController::columnWidth(int i) {
   }
 }
 
-KDCoordinate StorageValuesController::cumulatedWidthFromIndex(int i) {
+KDCoordinate ValuesController::cumulatedWidthFromIndex(int i) {
   if (i == 0) {
     return 0;
   } else {
@@ -176,14 +176,14 @@ KDCoordinate StorageValuesController::cumulatedWidthFromIndex(int i) {
   }
 }
 
-int StorageValuesController::indexFromCumulatedWidth(KDCoordinate offsetX) {
+int ValuesController::indexFromCumulatedWidth(KDCoordinate offsetX) {
   if (offsetX <= k_abscissaCellWidth) {
     return 0;
   }
   return (offsetX - k_abscissaCellWidth)/k_ordinateCellWidth+1;
 }
 
-HighlightCell * StorageValuesController::reusableCell(int index, int type) {
+HighlightCell * ValuesController::reusableCell(int index, int type) {
   assert(index >= 0);
   switch (type) {
     case 0:
@@ -202,7 +202,7 @@ HighlightCell * StorageValuesController::reusableCell(int index, int type) {
   }
 }
 
-int StorageValuesController::reusableCellCount(int type) {
+int ValuesController::reusableCellCount(int type) {
   switch (type) {
     case 0:
       return 1;
@@ -218,7 +218,7 @@ int StorageValuesController::reusableCellCount(int type) {
   }
 }
 
-int StorageValuesController::typeAtLocation(int i, int j) {
+int ValuesController::typeAtLocation(int i, int j) {
   if (j == 0) {
     if (i == 0) {
       return 0;
@@ -231,46 +231,46 @@ int StorageValuesController::typeAtLocation(int i, int j) {
   return 3;
 }
 
-bool StorageValuesController::isEmpty() const {
+bool ValuesController::isEmpty() const {
   if (functionStore()->numberOfActiveFunctions() == 0) {
     return true;
   }
   return false;
 }
 
-Responder * StorageValuesController::defaultController() {
+Responder * ValuesController::defaultController() {
   return tabController();
 }
 
-void StorageValuesController::viewWillAppear() {
+void ValuesController::viewWillAppear() {
   EditableCellTableViewController::viewWillAppear();
   header()->setSelectedButton(-1);
 }
 
-void StorageValuesController::viewDidDisappear() {
+void ValuesController::viewDidDisappear() {
   m_numberOfColumnsNeedUpdate = true;
   EditableCellTableViewController::viewDidDisappear();
 }
 
-Ion::Storage::Record StorageValuesController::recordAtColumn(int i) {
+Ion::Storage::Record ValuesController::recordAtColumn(int i) {
   assert(i > 0);
   return functionStore()->activeRecordAtIndex(i-1);
 }
 
-Responder * StorageValuesController::tabController() const {
+Responder * ValuesController::tabController() const {
   return (parentResponder()->parentResponder()->parentResponder()->parentResponder());
 }
 
-StackViewController * StorageValuesController::stackController() const {
+StackViewController * ValuesController::stackController() const {
   return (StackViewController *)(parentResponder()->parentResponder()->parentResponder());
 }
 
-void StorageValuesController::configureAbscissa() {
+void ValuesController::configureAbscissa() {
   StackViewController * stack = stackController();
   stack->push(&m_abscissaParameterController);
 }
 
-void StorageValuesController::configureFunction() {
+void ValuesController::configureFunction() {
 #if COPY_COLUMN
 #else
   /* Temporary: the sequence value controller does not have a function parameter
@@ -284,41 +284,41 @@ void StorageValuesController::configureFunction() {
   stack->push(functionParameterController());
 }
 
-bool StorageValuesController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
+bool ValuesController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
   if (rowIndex > 0 && columnIndex == 0) {
     return true;
   }
   return false;
 }
 
-bool StorageValuesController::setDataAtLocation(double floatBody, int columnIndex, int rowIndex) {
+bool ValuesController::setDataAtLocation(double floatBody, int columnIndex, int rowIndex) {
   m_interval->setElement(rowIndex-1, floatBody);
   return true;
 }
 
-double StorageValuesController::dataAtLocation(int columnIndex, int rowIndex) {
+double ValuesController::dataAtLocation(int columnIndex, int rowIndex) {
   return m_interval->element(rowIndex-1);
 }
 
-int StorageValuesController::numberOfElements() {
+int ValuesController::numberOfElements() {
   return m_interval->numberOfElements();
 }
 
-int StorageValuesController::maxNumberOfElements() const {
+int ValuesController::maxNumberOfElements() const {
   return Interval::k_maxNumberOfElements;
 }
 
-double StorageValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
+double ValuesController::evaluationOfAbscissaAtColumn(double abscissa, int columnIndex) {
   ExpiringPointer<Function> function = functionStore()->modelForRecord(recordAtColumn(columnIndex));
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   return function->evaluateAtAbscissa(abscissa, myApp->localContext());
 }
 
-void StorageValuesController::updateNumberOfColumns() {
+void ValuesController::updateNumberOfColumns() {
   m_numberOfColumns = 1+functionStore()->numberOfActiveFunctions();
 }
 
-FunctionStore * StorageValuesController::functionStore() const {
+FunctionStore * ValuesController::functionStore() const {
   FunctionApp * myApp = static_cast<FunctionApp *>(app());
   return myApp->functionStore();
 }
diff --git a/apps/shared/storage_values_controller.h b/apps/shared/values_controller.h
similarity index 82%
rename from apps/shared/storage_values_controller.h
rename to apps/shared/values_controller.h
index 7c2c6b1a4..0cab01c20 100644
--- a/apps/shared/storage_values_controller.h
+++ b/apps/shared/values_controller.h
@@ -1,21 +1,21 @@
-#ifndef SHARED_STORAGE_VALUES_CONTROLLER_H
-#define SHARED_STORAGE_VALUES_CONTROLLER_H
+#ifndef SHARED_VALUES_CONTROLLER_H
+#define SHARED_VALUES_CONTROLLER_H
 
 #include <escher.h>
-#include "storage_function_store.h"
+#include "function_store.h"
 #include "function_title_cell.h"
 #include "editable_cell_table_view_controller.h"
 #include "interval.h"
 #include "values_parameter_controller.h"
-#include "storage_values_function_parameter_controller.h"
+#include "values_function_parameter_controller.h"
 #include "interval_parameter_controller.h"
 #include <apps/i18n.h>
 
 namespace Shared {
 
-class StorageValuesController : public EditableCellTableViewController, public ButtonRowDelegate,  public AlternateEmptyViewDefaultDelegate {
+class ValuesController : public EditableCellTableViewController, public ButtonRowDelegate,  public AlternateEmptyViewDefaultDelegate {
 public:
-  StorageValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval);
+  ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval);
   const char * title() override;
   Interval * interval();
   int numberOfColumns() override;
@@ -71,7 +71,7 @@ private:
   virtual EvenOddBufferTextCell * floatCells(int j) = 0;
   char m_draftTextBuffer[TextField::maxBufferSize()];
   EvenOddEditableTextCell m_abscissaCells[k_maxNumberOfAbscissaCells];
-  virtual StorageValuesFunctionParameterController * functionParameterController() = 0;
+  virtual ValuesFunctionParameterController * functionParameterController() = 0;
   ValuesParameterController m_abscissaParameterController;
   Button m_setIntervalButton;
 };
diff --git a/apps/shared/storage_values_function_parameter_controller.cpp b/apps/shared/values_function_parameter_controller.cpp
similarity index 60%
rename from apps/shared/storage_values_function_parameter_controller.cpp
rename to apps/shared/values_function_parameter_controller.cpp
index 3047e49b4..059c9a34e 100644
--- a/apps/shared/storage_values_function_parameter_controller.cpp
+++ b/apps/shared/values_function_parameter_controller.cpp
@@ -1,19 +1,19 @@
-#include "storage_values_function_parameter_controller.h"
+#include "values_function_parameter_controller.h"
 #include "function_app.h"
 #include <assert.h>
 
 namespace Shared {
 
-const char * StorageValuesFunctionParameterController::title() {
+const char * ValuesFunctionParameterController::title() {
   return m_pageTitle;
 }
 
-void StorageValuesFunctionParameterController::viewWillAppear() {
+void ValuesFunctionParameterController::viewWillAppear() {
   FunctionApp * myApp = static_cast<FunctionApp *>(app());
   myApp->functionStore()->modelForRecord(m_record)->nameWithArgument(m_pageTitle, Function::k_maxNameWithArgumentSize, m_symbol);
 }
 
-void StorageValuesFunctionParameterController::didBecomeFirstResponder() {
+void ValuesFunctionParameterController::didBecomeFirstResponder() {
   m_selectableTableView.reloadData();
   selectCellAtLocation(0, 0);
   app()->setFirstResponder(&m_selectableTableView);
diff --git a/apps/shared/storage_values_function_parameter_controller.h b/apps/shared/values_function_parameter_controller.h
similarity index 76%
rename from apps/shared/storage_values_function_parameter_controller.h
rename to apps/shared/values_function_parameter_controller.h
index d9a1dcd3f..62d0522bb 100644
--- a/apps/shared/storage_values_function_parameter_controller.h
+++ b/apps/shared/values_function_parameter_controller.h
@@ -1,5 +1,5 @@
-#ifndef SHARED_STORAGE_VALUES_FUNCTION_PARAM_CONTROLLER_H
-#define SHARED_STORAGE_VALUES_FUNCTION_PARAM_CONTROLLER_H
+#ifndef SHARED_VALUES_FUNCTION_PARAM_CONTROLLER_H
+#define SHARED_VALUES_FUNCTION_PARAM_CONTROLLER_H
 
 #include <escher.h>
 #include "function.h"
@@ -7,9 +7,9 @@
 
 namespace Shared {
 
-class StorageValuesFunctionParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class ValuesFunctionParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  StorageValuesFunctionParameterController(char symbol) :
+  ValuesFunctionParameterController(char symbol) :
     ViewController(nullptr),
     m_copyColumn(I18n::Message::CopyColumnInList),
     m_selectableTableView(this, this, this),
diff --git a/apps/solver/equation_store.cpp b/apps/solver/equation_store.cpp
index ab65d8497..df78e173a 100644
--- a/apps/solver/equation_store.cpp
+++ b/apps/solver/equation_store.cpp
@@ -22,7 +22,7 @@ using namespace Shared;
 namespace Solver {
 
 EquationStore::EquationStore() :
-  StorageExpressionModelStore(),
+  ExpressionModelStore(),
   m_type(Type::LinearSystem),
   m_numberOfSolutions(0),
   m_exactSolutionExactLayouts{},
@@ -55,7 +55,7 @@ ExpressionModelHandle * EquationStore::memoizedModelAtIndex(int cacheIndex) cons
 }
 
 void EquationStore::tidy() {
-  StorageExpressionModelStore::tidy();
+  ExpressionModelStore::tidy();
   tidySolution();
 }
 
diff --git a/apps/solver/equation_store.h b/apps/solver/equation_store.h
index a667fc5a8..70737f088 100644
--- a/apps/solver/equation_store.h
+++ b/apps/solver/equation_store.h
@@ -2,13 +2,13 @@
 #define SOLVER_EQUATION_STORE_H
 
 #include "equation.h"
-#include "../shared/storage_expression_model_store.h"
+#include "../shared/expression_model_store.h"
 #include <poincare/symbol_abstract.h>
 #include <stdint.h>
 
 namespace Solver {
 
-class EquationStore : public Shared::StorageExpressionModelStore {
+class EquationStore : public Shared::ExpressionModelStore {
 public:
   enum class Type {
     LinearSystem,
@@ -25,7 +25,7 @@ public:
   };
   EquationStore();
 
-  /* StorageExpressionModelStore */
+  /* ExpressionModelStore */
   int maxNumberOfModels() const override { return k_maxNumberOfEquations; }
   Shared::ExpiringPointer<Equation> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Equation>(static_cast<Equation *>(privateModelForRecord(record))); }
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
@@ -77,7 +77,7 @@ private:
   static constexpr double k_precision = 0.01;
   static constexpr int k_maxNumberOfEquations = Poincare::Expression::k_maxNumberOfVariables; // Enable the same number of equations as the number of unknown variables
 
-  // StorageExpressionModelStore
+  // ExpressionModelStore
   const char * modelExtension() const override { return Ion::Storage::eqExtension; }
   /* We don't really use model memoization as the number of Equation is limited
    * and we keep enough Equations to store them all. */
diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index 363aee8d9..bd7f0eac4 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -8,7 +8,7 @@ using namespace Shared;
 namespace Solver {
 
 ListController::ListController(Responder * parentResponder, EquationStore * equationStore, ButtonRowController * footer) :
-  StorageExpressionModelListController(parentResponder, I18n::Message::AddEquation),
+  ExpressionModelListController(parentResponder, I18n::Message::AddEquation),
   ButtonRowDelegate(nullptr, footer),
   m_equationStore(equationStore),
   m_equationListView(this),
@@ -215,7 +215,7 @@ void ListController::addEmptyModel() {
 }
 
 bool ListController::removeModelRow(Ion::Storage::Record record) {
-  StorageExpressionModelListController::removeModelRow(record);
+  ExpressionModelListController::removeModelRow(record);
   reloadButtonMessage();
   reloadBrace();
   return true;
diff --git a/apps/solver/list_controller.h b/apps/solver/list_controller.h
index 82137cc7c..81227ccd6 100644
--- a/apps/solver/list_controller.h
+++ b/apps/solver/list_controller.h
@@ -2,7 +2,7 @@
 #define SOLVER_LIST_CONTROLLER_H
 
 #include <escher.h>
-#include "../shared/storage_expression_model_list_controller.h"
+#include "../shared/expression_model_list_controller.h"
 #include "../shared/layout_field_delegate.h"
 #include "../shared/text_field_delegate.h"
 #include "equation_store.h"
@@ -12,7 +12,7 @@
 
 namespace Solver {
 
-class ListController : public Shared::StorageExpressionModelListController, public ButtonRowDelegate, public ListViewDataSource, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
+class ListController : public Shared::ExpressionModelListController, public ButtonRowDelegate, public ListViewDataSource, public Shared::TextFieldDelegate, public Shared::LayoutFieldDelegate {
 public:
   ListController(Responder * parentResponder, EquationStore * equationStore, ButtonRowController * footer);
   /* ButtonRowDelegate */
@@ -20,9 +20,9 @@ public:
   Button * buttonAtIndex(int index, ButtonRowController::Position position) const override;
   /* ListViewDataSource */
   int numberOfRows() override { return numberOfExpressionRows(); }
-  KDCoordinate rowHeight(int j) override{ return StorageExpressionModelListController::memoizedRowHeight(j); }
-  KDCoordinate cumulatedHeightFromIndex(int j) override { return StorageExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
-  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return StorageExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
+  KDCoordinate rowHeight(int j) override{ return ExpressionModelListController::memoizedRowHeight(j); }
+  KDCoordinate cumulatedHeightFromIndex(int j) override { return ExpressionModelListController::memoizedCumulatedHeightFromIndex(j); }
+  int indexFromCumulatedHeight(KDCoordinate offsetY) override { return ExpressionModelListController::memoizedIndexFromCumulatedHeight(offsetY); }
   int typeAtLocation(int i, int j) override;
   HighlightCell * reusableCell(int index, int type) override;
   int reusableCellCount(int type) override;
@@ -31,10 +31,10 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
   void didBecomeFirstResponder() override;
   void didEnterResponderChain(Responder * previousFirstResponder) override;
-  /* StorageExpressionModelListController */
+  /* ExpressionModelListController */
   // Make methods public
-  void editExpression(Ion::Events::Event event) override { return Shared::StorageExpressionModelListController::editExpression(event); }
-  bool editSelectedRecordWithText(const char * text) override { return Shared::StorageExpressionModelListController::editSelectedRecordWithText(text); }
+  void editExpression(Ion::Events::Event event) override { return Shared::ExpressionModelListController::editExpression(event); }
+  bool editSelectedRecordWithText(const char * text) override { return Shared::ExpressionModelListController::editSelectedRecordWithText(text); }
   /* ViewController */
   View * view() override { return &m_equationListView; }
   /* Text/Layout Field Delegate */
@@ -53,7 +53,7 @@ private:
   void addEmptyModel() override;
   bool removeModelRow(Ion::Storage::Record record) override;
   void reloadBrace();
-  Shared::StorageExpressionModelStore * modelStore() override { return m_equationStore; }
+  Shared::ExpressionModelStore * modelStore() override { return m_equationStore; }
   StackViewController * stackController() const;
   InputViewController * inputController() override;
   // ListViewDataSource
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 5f05e6a8e..13c790278 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -3,7 +3,7 @@
 #include "shared/poincare_helpers.h"
 #include "shared/function.h"
 #include "shared/cartesian_function.h"
-#include "graph/storage_cartesian_function_store.h"
+#include "graph/cartesian_function_store.h"
 #include "constant.h"
 #include <escher/metric.h>
 #include <assert.h>
diff --git a/apps/variable_box_controller.h b/apps/variable_box_controller.h
index 13da1ea3c..55fd50826 100644
--- a/apps/variable_box_controller.h
+++ b/apps/variable_box_controller.h
@@ -58,7 +58,7 @@ private:
   MessageTableCellWithChevron m_nodeCells[k_numberOfMenuRows];
   VariableBoxEmptyController m_emptyViewController;
   // Layout memoization
-  // TODO: make a helper doing the RingMemoizationOfConsecutiveObjets to factorize this code and StorageExpressionModelStore code
+  // TODO: make a helper doing the RingMemoizationOfConsecutiveObjets to factorize this code and ExpressionModelStore code
   int m_firstMemoizedLayoutIndex;
   Poincare::Layout m_layouts[k_maxNumberOfDisplayedRows];
 };
diff --git a/apps/variable_box_empty_controller.cpp b/apps/variable_box_empty_controller.cpp
index 1f0d4fd7e..5140c9540 100644
--- a/apps/variable_box_empty_controller.cpp
+++ b/apps/variable_box_empty_controller.cpp
@@ -1,6 +1,6 @@
 #include "variable_box_empty_controller.h"
 #include <poincare/layout_helper.h>
-#include "graph/storage_cartesian_function_store.h"
+#include "graph/cartesian_function_store.h"
 #include <apps/i18n.h>
 #include <assert.h>
 
diff --git a/escher/src/selectable_table_view.cpp b/escher/src/selectable_table_view.cpp
index 9924a9cd7..7282164f9 100644
--- a/escher/src/selectable_table_view.cpp
+++ b/escher/src/selectable_table_view.cpp
@@ -90,7 +90,7 @@ bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstRespon
 
   /* We need to scroll:
    * - After notifying the delegate. For instance,
-   *   StorageExpressionModelListController needs to update its memoized cell
+   *   ExpressionModelListController needs to update its memoized cell
    *   height values before any scroll.
    * - Before setting the first responder. If the first responder is a view, it
    *   might change during the scroll. */

From a891fff930ece34f111aecc6011f1feb94fb62cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 11:51:08 +0100
Subject: [PATCH 130/295] [shared] Change name of classes: FunctionRecordData
 --> FunctionRecordDataBuffer CartesianFunctionRecordData -->
 CartesianFunctionRecordDataBuffer SequenceRecordData -->
 SequenceRecordDataBuffer

---
 apps/sequence/sequence.cpp         | 18 +++++++++---------
 apps/sequence/sequence.h           | 12 +++++++-----
 apps/sequence/sequence_store.cpp   |  2 +-
 apps/shared/cartesian_function.cpp | 10 +++++-----
 apps/shared/cartesian_function.h   | 12 +++++++-----
 apps/shared/function.cpp           |  4 ++--
 apps/shared/function.h             | 10 ++++++----
 7 files changed, 37 insertions(+), 31 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 82b1a2d1c..c463a007e 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -84,7 +84,7 @@ Poincare::Layout Sequence::nameLayout() {
 }
 
 bool Sequence::isDefined() {
-  SequenceRecordData * data = recordData();
+  SequenceRecordDataBuffer * data = recordData();
   switch (type()) {
     case Type::Explicit:
       return Function::isDefined();
@@ -96,7 +96,7 @@ bool Sequence::isDefined() {
 }
 
 bool Sequence::isEmpty() {
-  SequenceRecordData * data = recordData();
+  SequenceRecordDataBuffer * data = recordData();
   switch (type()) {
     case Type::Explicit:
       return Function::isEmpty();
@@ -185,10 +185,10 @@ double Sequence::sumBetweenBounds(double start, double end, Context * context) c
   return result;
 }
 
-Sequence::SequenceRecordData * Sequence::recordData() const {
+Sequence::SequenceRecordDataBuffer * Sequence::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
-  return reinterpret_cast<SequenceRecordData *>(const_cast<void *>(d.buffer));
+  return reinterpret_cast<SequenceRecordDataBuffer *>(const_cast<void *>(d.buffer));
 }
 
 /* Sequence Handle */
@@ -217,13 +217,13 @@ void Sequence::SequenceModel::updateNewDataWithExpression(Ion::Storage::Record *
 /* Definition Handle*/
 
 void * Sequence::DefinitionModel::expressionAddress(const Ion::Storage::Record * record) const {
-  return (char *)record->value().buffer+sizeof(SequenceRecordData);
+  return (char *)record->value().buffer+sizeof(SequenceRecordDataBuffer);
 }
 
 size_t Sequence::DefinitionModel::expressionSize(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
-  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
-  return data.size-sizeof(SequenceRecordData) - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
+  SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  return data.size-sizeof(SequenceRecordDataBuffer) - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
 }
 
 void Sequence::DefinitionModel::buildName(Sequence * sequence) {
@@ -248,7 +248,7 @@ void Sequence::DefinitionModel::buildName(Sequence * sequence) {
 
 void * Sequence::FirstInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
-  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
   size_t offset = data.size - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
   return (char *)data.buffer+offset;
 }
@@ -275,7 +275,7 @@ void Sequence::FirstInitialConditionModel::buildName(Sequence * sequence) {
 
 void * Sequence::SecondInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
-  SequenceRecordData * dataBuffer = static_cast<const Sequence *>(record)->recordData();
+  SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
   size_t offset = data.size - dataBuffer->secondInitialConditionSize();
   return (char *)data.buffer+offset;
 }
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index ec9708427..91c7d19e9 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -69,10 +69,12 @@ private:
   constexpr static const KDFont * k_layoutFont = KDFont::LargeFont;
   constexpr static double k_maxNumberOfTermsInSum = 100000.0;
 
-  class SequenceRecordData : public FunctionRecordData {
+  /* SequenceRecordDataBuffer is the layout of the data buffer of Record
+   * representing a Sequence. */
+  class SequenceRecordDataBuffer : public FunctionRecordDataBuffer {
   public:
-    SequenceRecordData(KDColor color) :
-      FunctionRecordData(color),
+    SequenceRecordDataBuffer(KDColor color) :
+      FunctionRecordDataBuffer(color),
       m_type(Type::Explicit),
       m_initialRank(0),
       m_firstInitialConditionSize(0),
@@ -134,9 +136,9 @@ private:
   };
 
   template<typename T> T templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const;
-  size_t metaDataSize() const override { return sizeof(SequenceRecordData); }
+  size_t metaDataSize() const override { return sizeof(SequenceRecordDataBuffer); }
   const Shared::ExpressionModel * model() const override { return &m_definition; }
-  SequenceRecordData * recordData() const;
+  SequenceRecordDataBuffer * recordData() const;
   DefinitionModel m_definition;
   FirstInitialConditionModel m_firstInitialCondition;
   SecondInitialConditionModel m_secondInitialCondition;
diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 3f96da4e8..7752c1ecc 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -32,7 +32,7 @@ Ion::Storage::Record::ErrorStatus SequenceStore::addEmptyModel() {
   assert(name);
   // Choose the corresponding color
   KDColor color = Palette::DataColor[nameIndex];
-  Sequence::SequenceRecordData data(color);
+  Sequence::SequenceRecordDataBuffer data(color);
   // m_sequences
   return Ion::Storage::sharedStorage()->createRecordWithExtension(name, modelExtension(), &data, sizeof(data));
 }
diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index b4af0122a..bc42ae84d 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -48,7 +48,7 @@ CartesianFunction CartesianFunction::NewModel(Ion::Storage::Record::ErrorStatus
   // Create the record
   char nameBuffer[SymbolAbstract::k_maxNameSize];
   int numberOfColors = sizeof(Palette::DataColor)/sizeof(KDColor);
-  CartesianFunctionRecordData data(Palette::DataColor[s_colorIndex++ % numberOfColors]);
+  CartesianFunctionRecordDataBuffer data(Palette::DataColor[s_colorIndex++ % numberOfColors]);
   if (baseName == nullptr) {
     DefaultName(nameBuffer, SymbolAbstract::k_maxNameSize);
     baseName = nameBuffer;
@@ -124,17 +124,17 @@ Expression::Coordinate2D CartesianFunction::nextIntersectionFrom(double start, d
 }
 
 void * CartesianFunction::Model::expressionAddress(const Ion::Storage::Record * record) const {
-  return (char *)record->value().buffer+sizeof(CartesianFunctionRecordData);
+  return (char *)record->value().buffer+sizeof(CartesianFunctionRecordDataBuffer);
 }
 
 size_t CartesianFunction::Model::expressionSize(const Ion::Storage::Record * record) const {
-  return record->value().size-sizeof(CartesianFunctionRecordData);
+  return record->value().size-sizeof(CartesianFunctionRecordDataBuffer);
 }
 
-CartesianFunction::CartesianFunctionRecordData * CartesianFunction::recordData() const {
+CartesianFunction::CartesianFunctionRecordDataBuffer * CartesianFunction::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
-  return reinterpret_cast<CartesianFunctionRecordData *>(const_cast<void *>(d.buffer));
+  return reinterpret_cast<CartesianFunctionRecordDataBuffer *>(const_cast<void *>(d.buffer));
 }
 
 }
diff --git a/apps/shared/cartesian_function.h b/apps/shared/cartesian_function.h
index 2b56b8aa5..0990816ca 100644
--- a/apps/shared/cartesian_function.h
+++ b/apps/shared/cartesian_function.h
@@ -31,10 +31,12 @@ public:
   double nextRootFrom(double start, double step, double max, Poincare::Context * context) const;
   Poincare::Expression::Coordinate2D nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Poincare::Expression expression) const;
 private:
-  class CartesianFunctionRecordData : public FunctionRecordData {
+  /* CartesianFunctionRecordDataBuffer is the layout of the data buffer of Record
+   * representing a CartesianFunction. */
+  class CartesianFunctionRecordDataBuffer : public FunctionRecordDataBuffer {
   public:
-    CartesianFunctionRecordData(KDColor color) :
-      FunctionRecordData(color),
+    CartesianFunctionRecordDataBuffer(KDColor color) :
+      FunctionRecordDataBuffer(color),
       m_displayDerivative(false)
     {}
     bool displayDerivative() const { return m_displayDerivative; }
@@ -51,9 +53,9 @@ private:
   private:
     size_t expressionSize(const Ion::Storage::Record * record) const override;
   };
-  size_t metaDataSize() const override { return sizeof(CartesianFunctionRecordData); }
+  size_t metaDataSize() const override { return sizeof(CartesianFunctionRecordDataBuffer); }
   const ExpressionModel * model() const override { return &m_model; }
-  CartesianFunctionRecordData * recordData() const;
+  CartesianFunctionRecordDataBuffer * recordData() const;
   Model m_model;
 };
 
diff --git a/apps/shared/function.cpp b/apps/shared/function.cpp
index f08f1b1d1..ea76cf015 100644
--- a/apps/shared/function.cpp
+++ b/apps/shared/function.cpp
@@ -85,10 +85,10 @@ T Function::templatedApproximateAtAbscissa(T x, Poincare::Context * context, cha
   return PoincareHelpers::ApproximateWithValueForSymbol(expressionReduced(context), unknownX, x, *context);
 }
 
-Function::FunctionRecordData * Function::recordData() const {
+Function::FunctionRecordDataBuffer * Function::recordData() const {
   assert(!isNull());
   Ion::Storage::Record::Data d = value();
-  return reinterpret_cast<FunctionRecordData *>(const_cast<void *>(d.buffer));
+  return reinterpret_cast<FunctionRecordDataBuffer *>(const_cast<void *>(d.buffer));
 }
 
 }
diff --git a/apps/shared/function.h b/apps/shared/function.h
index 9a93e6a50..1148ed54d 100644
--- a/apps/shared/function.h
+++ b/apps/shared/function.h
@@ -40,13 +40,15 @@ public:
   }
   virtual double sumBetweenBounds(double start, double end, Poincare::Context * context) const = 0;
 protected:
-  class FunctionRecordData {
+  /* FunctionRecordDataBuffer is the layout of the data buffer of Record
+   * representing a Function. */
+  class FunctionRecordDataBuffer {
   public:
-    FunctionRecordData(KDColor color) : m_color(color), m_active(true) {}
+    FunctionRecordDataBuffer(KDColor color) : m_color(color), m_active(true) {}
     KDColor color() const {
       /* Record::value() is a pointer to an address inside
        * Ion::Storage::sharedStorage(), and it might be unaligned. In the method
-       * recordData(), we cast Record::value() to the type FunctionRecordData.
+       * recordData(), we cast Record::value() to the type FunctionRecordDataBuffer.
        * We must thus do some convolutions to read KDColor, which is a uint16_t
        * and might produce an alignment error on the emscripten platform. */
       return KDColor::RGB16(Ion::StorageHelper::unalignedShort(reinterpret_cast<char *>(const_cast<KDColor *>(&m_color))));
@@ -59,7 +61,7 @@ protected:
   };
 private:
   template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const;
-  FunctionRecordData * recordData() const;
+  FunctionRecordDataBuffer * recordData() const;
 };
 
 }

From 336c1c8d73e922335ad1890f3ebc0b84d547bff1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 13:31:13 +0100
Subject: [PATCH 131/295] [apps/graph][apps/sequence] ListParameterController
 is a ListViewDataSource instead of a SimpleListViewDataSource (indeed, each
 cell has a specific type)

---
 apps/graph/list/list_parameter_controller.cpp |  8 +--
 apps/graph/list/list_parameter_controller.h   |  3 +-
 .../list/list_parameter_controller.cpp        | 64 +++++++++----------
 .../sequence/list/list_parameter_controller.h |  6 +-
 apps/shared/list_parameter_controller.cpp     | 18 +++++-
 apps/shared/list_parameter_controller.h       | 13 ++--
 6 files changed, 66 insertions(+), 46 deletions(-)

diff --git a/apps/graph/list/list_parameter_controller.cpp b/apps/graph/list/list_parameter_controller.cpp
index 29e1bf442..411fcff3d 100644
--- a/apps/graph/list/list_parameter_controller.cpp
+++ b/apps/graph/list/list_parameter_controller.cpp
@@ -6,11 +6,11 @@ using namespace Shared;
 
 namespace Graph {
 
-HighlightCell * ListParameterController::reusableCell(int index) {
-  if (index == 0) {
+HighlightCell * ListParameterController::reusableCell(int index, int type) {
+  if (type == 0) {
     return &m_renameCell;
   }
-  return ListParameterController::reusableCell(index -1);
+  return Shared::ListParameterController::reusableCell(index, type - 1);
 }
 
 bool ListParameterController::handleEnterOnRow(int rowIndex) {
@@ -18,7 +18,7 @@ bool ListParameterController::handleEnterOnRow(int rowIndex) {
     renameFunction();
     return true;
   }
-  return ListParameterController::handleEnterOnRow(rowIndex-1);
+  return Shared::ListParameterController::handleEnterOnRow(rowIndex-1);
 }
 
 void ListParameterController::renameFunction() {
diff --git a/apps/graph/list/list_parameter_controller.h b/apps/graph/list/list_parameter_controller.h
index ac127169f..21d41e376 100644
--- a/apps/graph/list/list_parameter_controller.h
+++ b/apps/graph/list/list_parameter_controller.h
@@ -14,7 +14,8 @@ public:
     m_listController(listController),
     m_renameCell(I18n::Message::Rename)
   {}
-  HighlightCell * reusableCell(int index) override;
+  // ListViewDataSource
+  HighlightCell * reusableCell(int index, int type) override;
 protected:
   bool handleEnterOnRow(int rowIndex) override;
 private:
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index b8b927402..cc0f25fcf 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -64,38 +64,6 @@ bool ListParameterController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-HighlightCell * ListParameterController::reusableCell(int index) {
-  switch (index) {
-    /*case 0:
-      return Shared::ListParameterController::reusableCell(index);*/
-    case 0://1:
-      return &m_typeCell;
-    case 1:
-      if (hasInitialRankRow()) {
-        return &m_initialRankCell;
-      }
-    default:
-      return Shared::ListParameterController::reusableCell(index-1-hasInitialRankRow());
-  }
-}
-
-void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
-  cell->setHighlighted(index == selectedRow()); // See FIXME in SelectableTableView::reloadData()
-  Shared::ListParameterController::willDisplayCellForIndex(cell, index);
-  if (cell == &m_typeCell && !m_record.isNull()) {
-    m_typeCell.setLayout(sequence()->definitionName());
-  }
-  if (cell == &m_initialRankCell && !m_record.isNull()) {
-    MessageTableCellWithEditableText * myCell = (MessageTableCellWithEditableText *) cell;
-    if (myCell->isEditing()) {
-      return;
-    }
-    char buffer[Sequence::k_initialRankNumberOfDigits+1];
-    Poincare::Integer(sequence()->initialRank()).serialize(buffer, Sequence::k_initialRankNumberOfDigits+1);
-    myCell->setAccessoryText(buffer);
-  }
-}
-
 bool ListParameterController::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
   return event == Ion::Events::Down || event == Ion::Events::Up || TextFieldDelegate::textFieldShouldFinishEditing(textField, event);
 }
@@ -152,6 +120,38 @@ void ListParameterController::tableViewDidChangeSelection(SelectableTableView *
   }
 }
 
+HighlightCell * ListParameterController::reusableCell(int index, int type) {
+  switch (type) {
+    /*case 0:
+      return Shared::ListParameterController::reusableCell(index);*/
+    case 0://1:
+      return &m_typeCell;
+    case 1:
+      if (hasInitialRankRow()) {
+        return &m_initialRankCell;
+      }
+    default:
+      return Shared::ListParameterController::reusableCell(index, type-1-hasInitialRankRow());
+  }
+}
+
+void ListParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
+  cell->setHighlighted(index == selectedRow()); // See FIXME in SelectableTableView::reloadData()
+  Shared::ListParameterController::willDisplayCellForIndex(cell, index);
+  if (cell == &m_typeCell && !m_record.isNull()) {
+    m_typeCell.setLayout(sequence()->definitionName());
+  }
+  if (cell == &m_initialRankCell && !m_record.isNull()) {
+    MessageTableCellWithEditableText * myCell = (MessageTableCellWithEditableText *) cell;
+    if (myCell->isEditing()) {
+      return;
+    }
+    char buffer[Sequence::k_initialRankNumberOfDigits+1];
+    Poincare::Integer(sequence()->initialRank()).serialize(buffer, Sequence::k_initialRankNumberOfDigits+1);
+    myCell->setAccessoryText(buffer);
+  }
+}
+
 TextFieldDelegateApp * ListParameterController::textFieldDelegateApp() {
   return (TextFieldDelegateApp *)app();
 }
diff --git a/apps/sequence/list/list_parameter_controller.h b/apps/sequence/list/list_parameter_controller.h
index f7a7d5eaa..09ff8c4cd 100644
--- a/apps/sequence/list/list_parameter_controller.h
+++ b/apps/sequence/list/list_parameter_controller.h
@@ -16,13 +16,15 @@ public:
   ListParameterController(::InputEventHandlerDelegate * inputEventHandlerDelegate, ListController * list);
   const char * title() override;
   bool handleEvent(Ion::Events::Event event) override;
-  HighlightCell * reusableCell(int index) override;
-  void willDisplayCellForIndex(HighlightCell * cell, int index) override;
 
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
   bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
   void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
   Shared::TextFieldDelegateApp * textFieldDelegateApp() override;
+
+  // ListViewDataSource
+  HighlightCell * reusableCell(int index, int type) override;
+  void willDisplayCellForIndex(HighlightCell * cell, int index) override;
 private:
 #if FUNCTION_COLOR_CHOICE
   constexpr static int k_totalNumberOfCell = 5;
diff --git a/apps/shared/list_parameter_controller.cpp b/apps/shared/list_parameter_controller.cpp
index 62f988d50..a968b0ce2 100644
--- a/apps/shared/list_parameter_controller.cpp
+++ b/apps/shared/list_parameter_controller.cpp
@@ -53,15 +53,27 @@ bool ListParameterController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-HighlightCell * ListParameterController::reusableCell(int index) {
-  assert(index >= 0);
+KDCoordinate ListParameterController::cumulatedHeightFromIndex(int j) {
+  return Metric::ParameterCellHeight * j;
+}
+
+int ListParameterController::indexFromCumulatedHeight(KDCoordinate offsetY) {
+  return (offsetY - 1) / Metric::ParameterCellHeight;
+}
+
+HighlightCell * ListParameterController::reusableCell(int index, int type) {
+  assert(index == 0);
   assert(index < totalNumberOfCells());
 #if FUNCTION_COLOR_CHOICE
   HighlightCell * cells[] = {&m_colorCell, &m_enableCell, &m_deleteCell};
 #else
   HighlightCell * cells[] = {&m_enableCell, &m_deleteCell};
 #endif
-  return cells[index];
+  return cells[type];
+}
+
+int ListParameterController::typeAtLocation(int i, int j) {
+  return j;
 }
 
 bool ListParameterController::handleEnterOnRow(int rowIndex) {
diff --git a/apps/shared/list_parameter_controller.h b/apps/shared/list_parameter_controller.h
index ea2992089..5202e8cff 100644
--- a/apps/shared/list_parameter_controller.h
+++ b/apps/shared/list_parameter_controller.h
@@ -7,7 +7,7 @@
 
 namespace Shared {
 
-class ListParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class ListParameterController : public ViewController, public ListViewDataSource, public SelectableTableViewDataSource {
 public:
   ListParameterController(Responder * parentResponder, I18n::Message functionColorMessage, I18n::Message deleteFunctionMessage, SelectableTableViewDelegate * tableDelegate = nullptr);
 
@@ -18,9 +18,14 @@ public:
   void didBecomeFirstResponder() override;
   void viewWillAppear() override;
   int numberOfRows() override { return totalNumberOfCells(); }
-  KDCoordinate cellHeight() override { return Metric::ParameterCellHeight; }
-  HighlightCell * reusableCell(int index) override;
-  int reusableCellCount() override { return totalNumberOfCells(); }
+
+  // ListViewDataSource
+  KDCoordinate rowHeight(int j) override { return Metric::ParameterCellHeight; }
+  KDCoordinate cumulatedHeightFromIndex(int j) override;
+  int indexFromCumulatedHeight(KDCoordinate offsetY) override;
+  HighlightCell * reusableCell(int index, int type) override;
+  int reusableCellCount(int type) override { return 1; }
+  int typeAtLocation(int i, int j) override;
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
 protected:
   virtual bool handleEnterOnRow(int rowIndex);

From 4e823e67b649f08d11a21129bdec36078254e8c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 14:04:08 +0100
Subject: [PATCH 132/295] [sequence] Fix Toolbox: sequence fullName is for
 example "u.seq" which cannot be compare to "u"

---
 apps/sequence/list/sequence_toolbox.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/sequence/list/sequence_toolbox.cpp b/apps/sequence/list/sequence_toolbox.cpp
index 0742fc4bd..b71c41246 100644
--- a/apps/sequence/list/sequence_toolbox.cpp
+++ b/apps/sequence/list/sequence_toolbox.cpp
@@ -72,7 +72,7 @@ void SequenceToolbox::buildExtraCellsLayouts(const char * sequenceName, int recu
    * There is a special case for double recurrent sequences because we do not
    * want to parse symbols u(n+2) or v(n+2). */
   m_numberOfAddedCells = recurrenceDepth == 2 ? 2*recurrenceDepth : 2*recurrenceDepth+1;
-  int sequenceIndex = sequenceName == SequenceStore::k_sequenceNames[0] ? 0 : 1;
+  int sequenceIndex = sequenceName[0] == SequenceStore::k_sequenceNames[0][0] ? 0 : 1;
   const char * otherSequenceName = SequenceStore::k_sequenceNames[1-sequenceIndex];
   for (int j = 0; j < recurrenceDepth; j++) {
     const char * indice = j == 0 ? "n" : "n+1";

From e1450676e0541ab9ff6850b0a491ad66c2aee4a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 14:05:23 +0100
Subject: [PATCH 133/295] [shared] ListParameterController: reinit hold record
 when removing it from the storage

---
 apps/shared/list_parameter_controller.cpp | 1 +
 apps/shared/list_parameter_controller.h   | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/apps/shared/list_parameter_controller.cpp b/apps/shared/list_parameter_controller.cpp
index a968b0ce2..567fa053c 100644
--- a/apps/shared/list_parameter_controller.cpp
+++ b/apps/shared/list_parameter_controller.cpp
@@ -97,6 +97,7 @@ bool ListParameterController::handleEnterOnRow(int rowIndex) {
       {
         assert(functionStore()->numberOfModels() > 0);
         functionStore()->removeModel(m_record);
+        setRecord(Ion::Storage::Record());
         StackViewController * stack = (StackViewController *)(parentResponder());
         stack->pop();
         return true;
diff --git a/apps/shared/list_parameter_controller.h b/apps/shared/list_parameter_controller.h
index 5202e8cff..f719918e6 100644
--- a/apps/shared/list_parameter_controller.h
+++ b/apps/shared/list_parameter_controller.h
@@ -14,7 +14,7 @@ public:
   View * view() override { return &m_selectableTableView; }
   const char * title() override;
   bool handleEvent(Ion::Events::Event event) override;
-  virtual void setRecord(Ion::Storage::Record record);
+  void setRecord(Ion::Storage::Record record);
   void didBecomeFirstResponder() override;
   void viewWillAppear() override;
   int numberOfRows() override { return totalNumberOfCells(); }

From f713551d46d8690e292d2d4e03e1d5bcdfe93dfe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 14:43:18 +0100
Subject: [PATCH 134/295] [code] Get rid of unused member variable in
 VariableBoxController

---
 apps/code/app.cpp                     | 2 +-
 apps/code/variable_box_controller.cpp | 5 ++---
 apps/code/variable_box_controller.h   | 5 +----
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/apps/code/app.cpp b/apps/code/app.cpp
index f3f368a8a..a640ded5a 100644
--- a/apps/code/app.cpp
+++ b/apps/code/app.cpp
@@ -84,7 +84,7 @@ App::App(Container * container, Snapshot * snapshot) :
   m_listFooter(&m_codeStackViewController, &m_menuController, &m_menuController, ButtonRowController::Position::Bottom, ButtonRowController::Style::EmbossedGrey, ButtonRowController::Size::Large),
   m_menuController(&m_listFooter, this, snapshot->scriptStore(), &m_listFooter),
   m_codeStackViewController(&m_modalViewController, &m_listFooter),
-  m_variableBoxController(this, snapshot->scriptStore())
+  m_variableBoxController(snapshot->scriptStore())
 {
 }
 
diff --git a/apps/code/variable_box_controller.cpp b/apps/code/variable_box_controller.cpp
index 674b4f445..13f086a57 100644
--- a/apps/code/variable_box_controller.cpp
+++ b/apps/code/variable_box_controller.cpp
@@ -11,9 +11,8 @@
 
 namespace Code {
 
-VariableBoxController::VariableBoxController(App * pythonDelegate, ScriptStore * scriptStore) :
+VariableBoxController::VariableBoxController(ScriptStore * scriptStore) :
   NestedMenuController(nullptr, I18n::Message::FunctionsAndVariables),
-  m_pythonDelegate(pythonDelegate),
   m_scriptNodesCount(0),
   m_scriptStore(scriptStore)
 {
@@ -34,7 +33,7 @@ void VariableBoxController::didEnterResponderChain(Responder * previousFirstResp
    * environment where Python has already been inited. This way, we do not
    * deinit Python when leaving the VariableBoxController, so we do not lose the
    * environment that was loaded when entering the VariableBoxController. */
-  assert(m_pythonDelegate->pythonIsInited());
+  assert(static_cast<App *>(app())->pythonIsInited());
 }
 
 static bool shouldAddObject(const char * name, int maxLength) {
diff --git a/apps/code/variable_box_controller.h b/apps/code/variable_box_controller.h
index 046ad33bc..6e1047126 100644
--- a/apps/code/variable_box_controller.h
+++ b/apps/code/variable_box_controller.h
@@ -8,11 +8,9 @@
 
 namespace Code {
 
-class App;
-
 class VariableBoxController : public NestedMenuController {
 public:
-  VariableBoxController(App * pythonDelegate, ScriptStore * scriptStore);
+  VariableBoxController(ScriptStore * scriptStore);
 
   /* Responder */
   bool handleEvent(Ion::Events::Event event) override;
@@ -36,7 +34,6 @@ private:
   void insertTextInCaller(const char * text);
   void addFunctionAtIndex(const char * functionName, int scriptIndex);
   void addVariableAtIndex(const char * variableName, int scriptIndex);
-  App * m_pythonDelegate;
   ScriptNode m_scriptNodes[k_maxScriptNodesCount];
   int m_scriptNodesCount;
   ScriptStore * m_scriptStore;

From 96ba100e1698e982c97d70c4bf8ed3a3df4e58a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 16:39:29 +0100
Subject: [PATCH 135/295] [sequence] Sequence: factorize InitialConditionModels

---
 apps/sequence/sequence.cpp | 59 +++++++++++---------------------------
 apps/sequence/sequence.h   | 35 ++++++++++++----------
 2 files changed, 36 insertions(+), 58 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index c463a007e..f29a4b0ce 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -89,9 +89,9 @@ bool Sequence::isDefined() {
     case Type::Explicit:
       return Function::isDefined();
     case Type::SingleRecurrence:
-      return Function::isDefined() && data->firstInitialConditionSize() > 0;
+      return Function::isDefined() && data->initialConditionSize(0) > 0;
     default:
-      return Function::isDefined() && data->firstInitialConditionSize() > 0 && data->secondInitialConditionSize() > 0;
+      return Function::isDefined() && data->initialConditionSize(0) > 0 && data->initialConditionSize(1) > 0;
   }
 }
 
@@ -101,9 +101,9 @@ bool Sequence::isEmpty() {
     case Type::Explicit:
       return Function::isEmpty();
     case Type::SingleRecurrence:
-      return Function::isEmpty() && data->firstInitialConditionSize() == 0;
+      return Function::isEmpty() && data->initialConditionSize(0) == 0;
     default:
-      return Function::isEmpty() && data->firstInitialConditionSize() == 0 && data->secondInitialConditionSize() == 0;
+      return Function::isEmpty() && data->initialConditionSize(0) == 0 && data->initialConditionSize(1) == 0;
   }
 }
 
@@ -191,7 +191,7 @@ Sequence::SequenceRecordDataBuffer * Sequence::recordData() const {
   return reinterpret_cast<SequenceRecordDataBuffer *>(const_cast<void *>(d.buffer));
 }
 
-/* Sequence Handle */
+/* Sequence Model */
 
 Poincare::Layout Sequence::SequenceModel::name(Sequence * sequence) {
   if (m_name.isUninitialized()) {
@@ -223,7 +223,7 @@ void * Sequence::DefinitionModel::expressionAddress(const Ion::Storage::Record *
 size_t Sequence::DefinitionModel::expressionSize(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
   SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
-  return data.size-sizeof(SequenceRecordDataBuffer) - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
+  return data.size-sizeof(SequenceRecordDataBuffer) - dataBuffer->initialConditionSize(0) - dataBuffer->initialConditionSize(1);
 }
 
 void Sequence::DefinitionModel::buildName(Sequence * sequence) {
@@ -244,54 +244,27 @@ void Sequence::DefinitionModel::buildName(Sequence * sequence) {
   }
 }
 
-/* First Initial Condition Handle*/
+/* Initial Condition Handle*/
 
-void * Sequence::FirstInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
+void * Sequence::InitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
   Ion::Storage::Record::Data data = record->value();
   SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
-  size_t offset = data.size - dataBuffer->firstInitialConditionSize() - dataBuffer->secondInitialConditionSize();
+  size_t offset = conditionIndex() == 0 ? data.size - dataBuffer->initialConditionSize(0) - dataBuffer->initialConditionSize(1) : data.size - dataBuffer->initialConditionSize(1) ;
   return (char *)data.buffer+offset;
 }
 
-size_t Sequence::FirstInitialConditionModel::expressionSize(const Ion::Storage::Record * record) const {
-  return static_cast<const Sequence *>(record)->recordData()->firstInitialConditionSize();
+size_t Sequence::InitialConditionModel::expressionSize(const Ion::Storage::Record * record) const {
+  return static_cast<const Sequence *>(record)->recordData()->initialConditionSize(conditionIndex());
 }
 
-void Sequence::FirstInitialConditionModel::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
-  static_cast<const Sequence *>(record)->recordData()->setFirstInitialConditionSize(newSize);
+void Sequence::InitialConditionModel::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
+  static_cast<const Sequence *>(record)->recordData()->setInitialConditionSize(newSize, conditionIndex());
 }
 
-void Sequence::FirstInitialConditionModel::buildName(Sequence * sequence) {
-  assert(sequence->type() == Type::SingleRecurrence || sequence->type() == Type::DoubleRecurrence);
+void Sequence::InitialConditionModel::buildName(Sequence * sequence) {
+  assert((conditionIndex() == 0 && sequence->type() == Type::SingleRecurrence) || sequence->type() == Type::DoubleRecurrence);
   char buffer[k_initialRankNumberOfDigits+1];
-  Integer(sequence->initialRank()).serialize(buffer, k_initialRankNumberOfDigits+1);
-  Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
-  m_name = HorizontalLayout::Builder(
-      CodePointLayout::Builder(sequence->fullName()[0], k_layoutFont),
-      VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
-}
-
-/* Second Initial Condition Handle*/
-
-void * Sequence::SecondInitialConditionModel::expressionAddress(const Ion::Storage::Record * record) const {
-  Ion::Storage::Record::Data data = record->value();
-  SequenceRecordDataBuffer * dataBuffer = static_cast<const Sequence *>(record)->recordData();
-  size_t offset = data.size - dataBuffer->secondInitialConditionSize();
-  return (char *)data.buffer+offset;
-}
-
-void Sequence::SecondInitialConditionModel::updateMetaData(const Ion::Storage::Record * record, size_t newSize) {
-  static_cast<const Sequence *>(record)->recordData()->setSecondInitialConditionSize(newSize);
-}
-
-size_t Sequence::SecondInitialConditionModel::expressionSize(const Ion::Storage::Record * record) const {
-  return static_cast<const Sequence *>(record)->recordData()->secondInitialConditionSize();
-}
-
-void Sequence::SecondInitialConditionModel::buildName(Sequence * sequence) {
-  assert(sequence->type() == Type::DoubleRecurrence);
-  char buffer[k_initialRankNumberOfDigits+1];
-  Integer(sequence->initialRank()+1).serialize(buffer, k_initialRankNumberOfDigits+1);
+  Integer(sequence->initialRank()+conditionIndex()).serialize(buffer, k_initialRankNumberOfDigits+1);
   Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
   m_name = HorizontalLayout::Builder(
       CodePointLayout::Builder(sequence->fullName()[0], k_layoutFont),
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 91c7d19e9..61e43386e 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -77,23 +77,26 @@ private:
       FunctionRecordDataBuffer(color),
       m_type(Type::Explicit),
       m_initialRank(0),
-      m_firstInitialConditionSize(0),
-      m_secondInitialConditionSize(0)
+      m_initialConditionSizes{0,0}
     {}
     Type type() const { return m_type; }
     void setType(Type type) { m_type = type; }
     int initialRank() const { return m_initialRank; }
     void setInitialRank(int initialRank) { m_initialRank = initialRank; }
-    size_t firstInitialConditionSize() const { return m_firstInitialConditionSize; }
-    void setFirstInitialConditionSize(uint16_t firstInitialConditionSize) { m_firstInitialConditionSize = firstInitialConditionSize; }
-    size_t secondInitialConditionSize() const { return m_secondInitialConditionSize; }
-    void setSecondInitialConditionSize(uint16_t secondInitialConditionSize) { m_secondInitialConditionSize = secondInitialConditionSize; }
+    size_t initialConditionSize(int conditionIndex) {
+      assert(conditionIndex >= 0 && conditionIndex < 2);
+      return m_initialConditionSizes[conditionIndex];
+    }
+    void setInitialConditionSize(uint16_t size, int conditionIndex) {
+      assert(conditionIndex >= 0 && conditionIndex < 2);
+      m_initialConditionSizes[conditionIndex] = size;
+    }
+
   private:
     static_assert((1 << 8*sizeof(uint16_t)) > Ion::Storage::k_storageSize, "Potential overflows of Sequence initial condition sizes");
     Type m_type;
     uint8_t m_initialRank;
-    uint16_t m_firstInitialConditionSize;
-    uint16_t m_secondInitialConditionSize;
+    uint16_t m_initialConditionSizes[2];
   };
 
   class SequenceModel : public Shared::ExpressionModel {
@@ -117,22 +120,24 @@ private:
     void buildName(Sequence * sequence) override;
   };
 
-  class FirstInitialConditionModel : public SequenceModel {
+  class InitialConditionModel : public SequenceModel {
   public:
     void * expressionAddress(const Ion::Storage::Record * record) const override;
   private:
     void updateMetaData(const Ion::Storage::Record * record, size_t newSize) override;
     size_t expressionSize(const Ion::Storage::Record * record) const override;
     void buildName(Sequence * sequence) override;
+    virtual int conditionIndex() const = 0;
   };
 
-  class SecondInitialConditionModel : public SequenceModel {
-  public:
-    void * expressionAddress(const Ion::Storage::Record * record) const override;
+  class FirstInitialConditionModel : public InitialConditionModel {
   private:
-    void updateMetaData(const Ion::Storage::Record * record, size_t newSize) override;
-    size_t expressionSize(const Ion::Storage::Record * record) const override;
-    void buildName(Sequence * sequence) override;
+    int conditionIndex() const override { return 0; }
+  };
+
+  class SecondInitialConditionModel : public InitialConditionModel {
+  private:
+    int conditionIndex() const override { return 1; }
   };
 
   template<typename T> T templatedApproximateAtAbscissa(T x, SequenceContext * sqctx) const;

From 2651e911d570e8fdd1599cc6131113521e11a71d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 17:08:47 +0100
Subject: [PATCH 136/295] [sequence] Fix bug: number of curves in graph is the
 number of active functions

---
 apps/sequence/graph/graph_controller.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 62cab8af7..54d897d5b 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -20,8 +20,6 @@ public:
   // InteractiveCurveViewRangeDelegate
   float interestingXMin() const override;
   float interestingXHalfRange() const override;
-protected:
-  int numberOfCurves() const override { return functionStore()->numberOfModels(); }
 private:
   BannerView * bannerView() override { return &m_bannerView; }
   bool handleEnter() override;

From 238d0ca63d13740387994a9909b14aef9a52c54c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 12 Mar 2019 17:43:08 +0100
Subject: [PATCH 137/295] [sequence] Fix Sequence::isDefined

---
 apps/sequence/sequence.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index f29a4b0ce..4f4272b15 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -87,11 +87,11 @@ bool Sequence::isDefined() {
   SequenceRecordDataBuffer * data = recordData();
   switch (type()) {
     case Type::Explicit:
-      return Function::isDefined();
+      return value().size > metaDataSize();
     case Type::SingleRecurrence:
-      return Function::isDefined() && data->initialConditionSize(0) > 0;
+      return data->initialConditionSize(0) > 0 && value().size > metaDataSize() + data->initialConditionSize(0);
     default:
-      return Function::isDefined() && data->initialConditionSize(0) > 0 && data->initialConditionSize(1) > 0;
+      return data->initialConditionSize(0) > 0 && data->initialConditionSize(0) > 0 && value().size > metaDataSize() + data->initialConditionSize(0) + data->initialConditionSize(1);
   }
 }
 

From cc842d5ee72ace481df4f3d4110e02d5e4c5c1ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 13 Mar 2019 15:17:27 +0100
Subject: [PATCH 138/295] [shared] Clean unused method maxInt in
 ExpressionModelHandle

---
 apps/shared/expression_model_handle.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index be8713249..c167a2e6a 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -11,8 +11,6 @@ using namespace Poincare;
 
 namespace Shared {
 
-static inline int maxInt(int x, int y) { return x > y ? x : y; }
-
 ExpressionModelHandle::ExpressionModelHandle(Storage::Record record) :
   Storage::Record(record)
 {

From f3c365a0dfa6fa0e45a7a01ccf95fa68be5d3c01 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 13 Mar 2019 14:05:59 +0100
Subject: [PATCH 139/295] [ion/shared/events] Correct text for Ion::Event::EE

---
 ion/src/shared/events.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ion/src/shared/events.cpp b/ion/src/shared/events.cpp
index 60fb99c63..f0f78d032 100644
--- a/ion/src/shared/events.cpp
+++ b/ion/src/shared/events.cpp
@@ -36,7 +36,7 @@ static constexpr EventData s_dataForEvent[4*Event::PageSize] = {
   T("7"), T("8"), T("9"), T("("), T(")"), U(),
   T("4"), T("5"), T("6"), T("×"), T("/"), U(),
   T("1"), T("2"), T("3"), T("+"), T("-"), U(),
-  T("0"), T("."), T("ℯ"), TL(), TL(), U(),
+  T("0"), T("."), T("ᴇ"), TL(), TL(), U(),
 // Shift
   TL(), U(), U(), TL(), U(), U(),
   U(), U(), U(), U(), U(), U(),

From 2af3efaba010b97d0583912e8a215d9f89ebbafa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 20 Mar 2019 18:13:34 +0100
Subject: [PATCH 140/295] [probability] ExponentialLaw: fix
 cumulativeDistributiveFunctionAtAbscissa for value < 0

---
 apps/probability/law/exponential_law.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/probability/law/exponential_law.cpp b/apps/probability/law/exponential_law.cpp
index b8111f9d9..152c6554f 100644
--- a/apps/probability/law/exponential_law.cpp
+++ b/apps/probability/law/exponential_law.cpp
@@ -47,6 +47,9 @@ bool ExponentialLaw::authorizedValueAtIndex(float x, int index) const {
 }
 
 double ExponentialLaw::cumulativeDistributiveFunctionAtAbscissa(double x) const {
+  if (x < 0.0) {
+    return 0.0;
+  }
   return 1.0 - std::exp((double)(-m_parameter1 * x));
 }
 

From 193e678fb594aecef563e921002cab6637a5bff6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 19 Mar 2019 10:53:11 +0100
Subject: [PATCH 141/295] [apps/probability] Rename k_maxNumOfTitleChars ->
 k_titleBufferSize

---
 apps/probability/calculation_controller.cpp | 14 +++++++-------
 apps/probability/calculation_controller.h   |  4 ++--
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 778a16a89..0cbacaa4a 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -278,26 +278,26 @@ TextFieldDelegateApp * CalculationController::textFieldDelegateApp() {
 void CalculationController::updateTitle() {
   int currentChar = 0;
   for (int index = 0; index < m_law->numberOfParameter(); index++) {
-    if (currentChar >= k_maxNumberOfTitleCharacters) {
+    if (currentChar >= k_titleBufferSize) {
       break;
     }
     m_titleBuffer[currentChar++] = I18n::translate(m_law->parameterNameAtIndex(index))[0];
-    strlcpy(m_titleBuffer+currentChar, " = ", k_maxNumberOfTitleCharacters - currentChar);
+    strlcpy(m_titleBuffer+currentChar, " = ", k_titleBufferSize - currentChar);
     currentChar += 3;
-    if (currentChar >= k_maxNumberOfTitleCharacters) {
+    if (currentChar >= k_titleBufferSize) {
       break;
     }
     constexpr size_t bufferSize = PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits);
     char buffer[bufferSize];
     PrintFloat::convertFloatToText<double>(m_law->parameterValueAtIndex(index), buffer, bufferSize, Constant::ShortNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    strlcpy(m_titleBuffer+currentChar, buffer, k_maxNumberOfTitleCharacters - currentChar);
+    strlcpy(m_titleBuffer+currentChar, buffer, k_titleBufferSize - currentChar);
     currentChar += strlen(buffer);
-    if (currentChar >= k_maxNumberOfTitleCharacters) {
+    if (currentChar >= k_titleBufferSize) {
       break;
     }
-    currentChar += UTF8Decoder::CodePointToChars(' ', m_titleBuffer + currentChar, k_maxNumberOfTitleCharacters - currentChar);
+    currentChar += UTF8Decoder::CodePointToChars(' ', m_titleBuffer + currentChar, k_titleBufferSize - currentChar);
   }
-  m_titleBuffer[minInt(currentChar, k_maxNumberOfTitleCharacters) - 1] = 0;
+  m_titleBuffer[minInt(currentChar, k_titleBufferSize) - 1] = 0;
 }
 
 }
diff --git a/apps/probability/calculation_controller.h b/apps/probability/calculation_controller.h
index 88df678b0..9aebd0410 100644
--- a/apps/probability/calculation_controller.h
+++ b/apps/probability/calculation_controller.h
@@ -71,8 +71,8 @@ private:
   CalculationCell m_calculationCells[k_numberOfCalculationCells];
   Calculation * m_calculation;
   Law * m_law;
-  constexpr static int k_maxNumberOfTitleCharacters = 30;
-  char m_titleBuffer[k_maxNumberOfTitleCharacters];
+  constexpr static int k_titleBufferSize = 30;
+  char m_titleBuffer[k_titleBufferSize];
 };
 
 }

From cf1fc05e9b2e15c22868b3cd77aabeb5287408d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 19 Mar 2019 11:06:34 +0100
Subject: [PATCH 142/295] [apps/probability] Fix UTF8 problem when copying law
 parameter

In probability, when displaying the exponential law for instance, the
lambda did not appear correctly.
---
 apps/probability/calculation_controller.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 0cbacaa4a..3ce66b908 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -281,17 +281,20 @@ void CalculationController::updateTitle() {
     if (currentChar >= k_titleBufferSize) {
       break;
     }
-    m_titleBuffer[currentChar++] = I18n::translate(m_law->parameterNameAtIndex(index))[0];
-    strlcpy(m_titleBuffer+currentChar, " = ", k_titleBufferSize - currentChar);
-    currentChar += 3;
+    /* strlcpy returns the size of src, not the size copied, but it is not a
+     * problem here. */
+    currentChar += strlcpy(m_titleBuffer+currentChar, I18n::translate(m_law->parameterNameAtIndex(index)), k_titleBufferSize - currentChar);
+    if (currentChar >= k_titleBufferSize) {
+      break;
+    }
+    currentChar += strlcpy(m_titleBuffer+currentChar, " = ", k_titleBufferSize - currentChar);
     if (currentChar >= k_titleBufferSize) {
       break;
     }
     constexpr size_t bufferSize = PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits);
     char buffer[bufferSize];
     PrintFloat::convertFloatToText<double>(m_law->parameterValueAtIndex(index), buffer, bufferSize, Constant::ShortNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    strlcpy(m_titleBuffer+currentChar, buffer, k_titleBufferSize - currentChar);
-    currentChar += strlen(buffer);
+    currentChar += strlcpy(m_titleBuffer+currentChar, buffer, k_titleBufferSize - currentChar);
     if (currentChar >= k_titleBufferSize) {
       break;
     }

From 699cd19bd617dbf959c669f47c6e9391eef0d716 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 11:17:55 +0100
Subject: [PATCH 143/295] [unicode] Use 3BC symbol instead of B5 for the glyph
 Mu.

NFKD normalization transforms uniB5 into uni3BC.
---
 apps/probability/base.de.i18n | 2 +-
 apps/probability/base.en.i18n | 2 +-
 apps/probability/base.es.i18n | 2 +-
 apps/probability/base.fr.i18n | 2 +-
 apps/probability/base.pt.i18n | 2 +-
 apps/shared.universal.i18n    | 2 +-
 kandinsky/fonts/code_points.h | 2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/apps/probability/base.de.i18n b/apps/probability/base.de.i18n
index 86bea6ee8..78de545c8 100644
--- a/apps/probability/base.de.i18n
+++ b/apps/probability/base.de.i18n
@@ -15,7 +15,7 @@ RepetitionNumber = "n: Anzahl der Versuche"
 SuccessProbability = "p: Erfolgswahrscheinlichkeit"
 IntervalDefinition = "[a,b]: Intervall"
 LambdaExponentialDefinition = "λ: Parameter"
-MeanDefinition = "µ: Erwartungswert"
+MeanDefinition = "μ: Erwartungswert"
 DeviationDefinition = "σ: Standardabweichung"
 LambdaPoissonDefinition = "λ: Parameter"
 ComputeProbability = "Wahrscheinlichkeit berechnen"
diff --git a/apps/probability/base.en.i18n b/apps/probability/base.en.i18n
index 26643ba06..d8c08a4be 100644
--- a/apps/probability/base.en.i18n
+++ b/apps/probability/base.en.i18n
@@ -15,7 +15,7 @@ RepetitionNumber = "n: Number of trials"
 SuccessProbability = "p: Success probability"
 IntervalDefinition = "[a,b]: Interval"
 LambdaExponentialDefinition = "λ: Rate parameter"
-MeanDefinition = "µ: Mean"
+MeanDefinition = "μ: Mean"
 DeviationDefinition = "σ: Standard deviation"
 LambdaPoissonDefinition = "λ: Parameter"
 ComputeProbability = "Calculate probabilities"
diff --git a/apps/probability/base.es.i18n b/apps/probability/base.es.i18n
index e17606b75..b63d9adc0 100644
--- a/apps/probability/base.es.i18n
+++ b/apps/probability/base.es.i18n
@@ -15,7 +15,7 @@ RepetitionNumber = "n : Número de ensayos "
 SuccessProbability = "p : Probabilidad de éxito "
 IntervalDefinition = "[a,b] : Intervalo"
 LambdaExponentialDefinition = "λ : Parámetro"
-MeanDefinition = "µ : Media"
+MeanDefinition = "μ : Media"
 DeviationDefinition = "σ : Desviación típica"
 LambdaPoissonDefinition = "λ : Parámetro"
 ComputeProbability = "Calcular las probabilidades"
diff --git a/apps/probability/base.fr.i18n b/apps/probability/base.fr.i18n
index 0c07b56a1..420cdd315 100644
--- a/apps/probability/base.fr.i18n
+++ b/apps/probability/base.fr.i18n
@@ -15,7 +15,7 @@ RepetitionNumber = "n : Nombre de répétitions"
 SuccessProbability = "p : Probabilité de succès"
 IntervalDefinition = "[a,b] : Intervalle"
 LambdaExponentialDefinition = "λ : Paramètre"
-MeanDefinition = "µ : Espérance ou moyenne"
+MeanDefinition = "μ : Espérance ou moyenne"
 DeviationDefinition = "σ : Écart type"
 LambdaPoissonDefinition = "λ : Paramètre"
 ComputeProbability = "Calculer les probabilités"
diff --git a/apps/probability/base.pt.i18n b/apps/probability/base.pt.i18n
index 90e736e06..8c9335f3f 100644
--- a/apps/probability/base.pt.i18n
+++ b/apps/probability/base.pt.i18n
@@ -15,7 +15,7 @@ RepetitionNumber = "n : Número de ensaios"
 SuccessProbability = "p : Probabilidade de sucesso"
 IntervalDefinition = "[a,b] : Intervalo"
 LambdaExponentialDefinition = "λ : Parâmetro"
-MeanDefinition = "µ : Média"
+MeanDefinition = "μ : Média"
 DeviationDefinition = "σ : Desvio padrão"
 LambdaPoissonDefinition = "λ : Parâmetro"
 ComputeProbability = "Calcular probabilidades"
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index ed9d746f0..89203d8b1 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -45,7 +45,7 @@ MatrixCommand = "[[\x11]]"
 MatrixCommandWithArg = "[[1,2][3,4]]"
 MaxCommandWithArg = "max(L)"
 MinCommandWithArg = "min(L)"
-Mu = "µ"
+Mu = "μ"
 N = "n"
 PermuteCommandWithArg = "permute(n,r)"
 P = "p"
diff --git a/kandinsky/fonts/code_points.h b/kandinsky/fonts/code_points.h
index 50e3630f0..6712bcc2a 100644
--- a/kandinsky/fonts/code_points.h
+++ b/kandinsky/fonts/code_points.h
@@ -106,7 +106,6 @@ uint32_t CodePoints[] = {
   0x7e, // ~ // TILDE
 
   0xb0, // ° // DEGREE SIGN
-  0xb5, // µ // MICRO SIGN
   0xb7, // · // MIDDLE DOT
 
   0xc6, // Æ // LATIN CAPITAL LETTER AE
@@ -134,6 +133,7 @@ uint32_t CodePoints[] = {
   0x394,   // Δ // GREEK CAPITAL LETTER DELTA
   0x3b8,   // θ // GREEK SMALL LETTER THETA
   0x3bb,   // λ // GREEK SMALL LETTER LAMDA
+  0x3bc,   // μ // GREEK SMALL LETTER MU
   0x3c0,   // π // GREEK SMALL LETTER PI
   0x3c3,   // σ // GREEK SMALL LETTER SIGMA
   0x1d07,  // ᴇ // LATIN LETTER SMALL CAPITAL E

From c9d548ec8a8b91bdf8c5cdf88754a1b622c56902 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 11:49:10 +0100
Subject: [PATCH 144/295] [apps/reg] Clean regression models layout creation

---
 apps/regression/model/cubic_model.cpp         |  5 +--
 apps/regression/model/exponential_model.cpp   |  5 +--
 apps/regression/model/linear_model.cpp        | 13 ++------
 apps/regression/model/logarithmic_model.cpp   | 17 ++--------
 apps/regression/model/logistic_model.cpp      | 10 +++---
 apps/regression/model/power_model.cpp         |  5 +--
 apps/regression/model/quadratic_model.cpp     |  5 +--
 apps/regression/model/quartic_model.cpp       |  5 +--
 apps/regression/model/trigonometric_model.cpp | 33 +++++--------------
 9 files changed, 35 insertions(+), 63 deletions(-)

diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index acdbb4ee6..2c178cac7 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -19,7 +19,8 @@ namespace Regression {
 
 Layout CubicModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
+    constexpr int size = 15;
+    Layout layoutChildren[size] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
@@ -42,7 +43,7 @@ Layout CubicModel::layout() {
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('d', KDFont::SmallFont),
     };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 15);
+    m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index 936474e89..b67c02632 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -11,7 +11,8 @@ namespace Regression {
 
 Layout ExponentialModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
+    constexpr int size = 4;
+    Layout layoutChildren[size] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
@@ -24,7 +25,7 @@ Layout ExponentialModel::layout() {
           VerticalOffsetLayoutNode::Type::Superscript
         )
     };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 4);
+    m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index 46d85d837..e48e71d0f 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -1,9 +1,8 @@
 #include "linear_model.h"
 #include "../store.h"
+#include <poincare/layout_helper.h>
 #include <math.h>
 #include <assert.h>
-#include <poincare/code_point_layout.h>
-#include <poincare/horizontal_layout.h>
 
 using namespace Poincare;
 
@@ -11,14 +10,8 @@ namespace Regression {
 
 Layout LinearModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-    };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 5);
+    const char * s = "a·X+b";
+    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/logarithmic_model.cpp b/apps/regression/model/logarithmic_model.cpp
index b149f141b..c0d417a91 100644
--- a/apps/regression/model/logarithmic_model.cpp
+++ b/apps/regression/model/logarithmic_model.cpp
@@ -1,9 +1,8 @@
 #include "logarithmic_model.h"
 #include "../store.h"
+#include <poincare/layout_helper.h>
 #include <math.h>
 #include <assert.h>
-#include <poincare/code_point_layout.h>
-#include <poincare/horizontal_layout.h>
 
 using namespace Poincare;
 
@@ -11,18 +10,8 @@ namespace Regression {
 
 Layout LogarithmicModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('l', KDFont::SmallFont),
-      CodePointLayout::Builder('n', KDFont::SmallFont),
-      CodePointLayout::Builder('(', KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder(')', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont)
-    };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 9);
+    const char * s = "a·ln(X)+b";
+    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index 4ceef4949..45b75a2c5 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -12,26 +12,28 @@ namespace Regression {
 
 Layout LogisticModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout exponentLayoutChildren[] = {
+    constexpr int exponentSize = 4;
+    Layout exponentLayoutChildren[exponentSize] = {
       CodePointLayout::Builder('-', KDFont::SmallFont),
       CodePointLayout::Builder('b', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont)
     };
-    Layout layoutChildren[] = {
+    constexpr int denominatorSize = 6;
+    Layout layoutChildren[denominatorSize] = {
       CodePointLayout::Builder('1', KDFont::SmallFont),
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
       VerticalOffsetLayout::Builder(
-          HorizontalLayout::Builder(exponentLayoutChildren, 4),
+          HorizontalLayout::Builder(exponentLayoutChildren, exponentSize),
           VerticalOffsetLayoutNode::Type::Superscript
         )
     };
     m_layout = FractionLayout::Builder(
        CodePointLayout::Builder('c', KDFont::SmallFont),
-       HorizontalLayout::Builder(layoutChildren, 6)
+       HorizontalLayout::Builder(layoutChildren, denominatorSize)
       );
   }
   return m_layout;
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index 00a2a83c8..6fcfe3cf9 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -12,7 +12,8 @@ namespace Regression {
 
 Layout PowerModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
+    constexpr int size = 4;
+    Layout layoutChildren[size] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
@@ -21,7 +22,7 @@ Layout PowerModel::layout() {
           VerticalOffsetLayoutNode::Type::Superscript
         ),
       };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 4);
+    m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index e3691c734..dc239cc26 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -19,7 +19,8 @@ namespace Regression {
 
 Layout QuadraticModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
+    constexpr int size = 10;
+    Layout layoutChildren[size] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
@@ -34,7 +35,7 @@ Layout QuadraticModel::layout() {
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('c', KDFont::SmallFont),
     };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 10);
+    m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 3be41332b..831572519 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -19,7 +19,8 @@ namespace Regression {
 
 Layout QuarticModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
+    constexpr int size = 20;
+    Layout layoutChildren[size] = {
       CodePointLayout::Builder('a', KDFont::SmallFont),
       CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
       CodePointLayout::Builder('X', KDFont::SmallFont),
@@ -50,7 +51,7 @@ Layout QuarticModel::layout() {
       CodePointLayout::Builder('+', KDFont::SmallFont),
       CodePointLayout::Builder('e', KDFont::SmallFont),
     };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 20);
+    m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/trigonometric_model.cpp b/apps/regression/model/trigonometric_model.cpp
index 9f40724df..7e54a70c7 100644
--- a/apps/regression/model/trigonometric_model.cpp
+++ b/apps/regression/model/trigonometric_model.cpp
@@ -1,17 +1,15 @@
 #include "trigonometric_model.h"
 #include "../../shared/poincare_helpers.h"
-#include <math.h>
-#include <poincare/preferences.h>
-#include <assert.h>
-#include <poincare/code_point_layout.h>
-#include <poincare/horizontal_layout.h>
-#include <poincare/vertical_offset_layout.h>
-#include <poincare/number.h>
-#include <poincare/symbol.h>
 #include <poincare/addition.h>
+#include <poincare/layout_helper.h>
 #include <poincare/multiplication.h>
+#include <poincare/number.h>
 #include <poincare/power.h>
+#include <poincare/preferences.h>
 #include <poincare/sine.h>
+#include <poincare/symbol.h>
+#include <math.h>
+#include <assert.h>
 
 using namespace Poincare;
 using namespace Shared;
@@ -20,23 +18,8 @@ namespace Regression {
 
 Layout TrigonometricModel::layout() {
   if (m_layout.isUninitialized()) {
-    Layout layoutChildren[] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('s', KDFont::SmallFont),
-      CodePointLayout::Builder('i', KDFont::SmallFont),
-      CodePointLayout::Builder('n', KDFont::SmallFont),
-      CodePointLayout::Builder('(', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(')', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('d', KDFont::SmallFont)
-    };
-    m_layout = HorizontalLayout::Builder(layoutChildren, 14);
+    const char * s = "a·sin(b·X+c)+d";
+    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
   }
   return m_layout;
 }

From 7329b450dc9d7c38bae8da9542fb3e5a1e13e320 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 11:54:03 +0100
Subject: [PATCH 145/295] [apps/reg] Factorize the model layouts fonts

---
 apps/regression/model/cubic_model.cpp         | 30 +++++++-------
 apps/regression/model/exponential_model.cpp   | 12 +++---
 apps/regression/model/linear_model.cpp        |  2 +-
 apps/regression/model/logarithmic_model.cpp   |  2 +-
 apps/regression/model/logistic_model.cpp      | 20 +++++-----
 apps/regression/model/model.h                 |  1 +
 apps/regression/model/power_model.cpp         |  8 ++--
 apps/regression/model/quadratic_model.cpp     | 20 +++++-----
 apps/regression/model/quartic_model.cpp       | 40 +++++++++----------
 apps/regression/model/trigonometric_model.cpp |  2 +-
 10 files changed, 69 insertions(+), 68 deletions(-)

diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index 2c178cac7..7a1febc48 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -21,27 +21,27 @@ Layout CubicModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int size = 15;
     Layout layoutChildren[size] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('3', KDFont::SmallFont),
+          CodePointLayout::Builder('3', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('b', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('d', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('c', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('d', k_layoutFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index b67c02632..be49691c0 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -13,14 +13,14 @@ Layout ExponentialModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int size = 4;
     Layout layoutChildren[size] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('e', k_layoutFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(
-            CodePointLayout::Builder('b', KDFont::SmallFont),
-            CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-            CodePointLayout::Builder('X', KDFont::SmallFont)
+            CodePointLayout::Builder('b', k_layoutFont),
+            CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+            CodePointLayout::Builder('X', k_layoutFont)
           ),
           VerticalOffsetLayoutNode::Type::Superscript
         )
diff --git a/apps/regression/model/linear_model.cpp b/apps/regression/model/linear_model.cpp
index e48e71d0f..3de85628f 100644
--- a/apps/regression/model/linear_model.cpp
+++ b/apps/regression/model/linear_model.cpp
@@ -11,7 +11,7 @@ namespace Regression {
 Layout LinearModel::layout() {
   if (m_layout.isUninitialized()) {
     const char * s = "a·X+b";
-    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
+    m_layout = LayoutHelper::String(s, strlen(s), k_layoutFont);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/logarithmic_model.cpp b/apps/regression/model/logarithmic_model.cpp
index c0d417a91..f5c23a105 100644
--- a/apps/regression/model/logarithmic_model.cpp
+++ b/apps/regression/model/logarithmic_model.cpp
@@ -11,7 +11,7 @@ namespace Regression {
 Layout LogarithmicModel::layout() {
   if (m_layout.isUninitialized()) {
     const char * s = "a·ln(X)+b";
-    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
+    m_layout = LayoutHelper::String(s, strlen(s), k_layoutFont);
   }
   return m_layout;
 }
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index 45b75a2c5..9ff69660f 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -14,25 +14,25 @@ Layout LogisticModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int exponentSize = 4;
     Layout exponentLayoutChildren[exponentSize] = {
-      CodePointLayout::Builder('-', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont)
+      CodePointLayout::Builder('-', k_layoutFont),
+      CodePointLayout::Builder('b', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont)
     };
     constexpr int denominatorSize = 6;
     Layout layoutChildren[denominatorSize] = {
-      CodePointLayout::Builder('1', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('1', k_layoutFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('e', k_layoutFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(exponentLayoutChildren, exponentSize),
           VerticalOffsetLayoutNode::Type::Superscript
         )
     };
     m_layout = FractionLayout::Builder(
-       CodePointLayout::Builder('c', KDFont::SmallFont),
+       CodePointLayout::Builder('c', k_layoutFont),
        HorizontalLayout::Builder(layoutChildren, denominatorSize)
       );
   }
diff --git a/apps/regression/model/model.h b/apps/regression/model/model.h
index 60a4e5470..2a233fe84 100644
--- a/apps/regression/model/model.h
+++ b/apps/regression/model/model.h
@@ -41,6 +41,7 @@ public:
 protected:
   // Fit
   virtual bool dataSuitableForFit(Store * store, int series) const;
+  constexpr static const KDFont * k_layoutFont = KDFont::SmallFont;
   Poincare::Layout m_layout;
 private:
   // Model attributes
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index 6fcfe3cf9..779d290a7 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -14,11 +14,11 @@ Layout PowerModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int size = 4;
     Layout layoutChildren[size] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('b', KDFont::SmallFont),
+          CodePointLayout::Builder('b', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
       };
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index dc239cc26..51b64eceb 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -21,19 +21,19 @@ Layout QuadraticModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int size = 10;
     Layout layoutChildren[size] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('c', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('b', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('c', k_layoutFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 831572519..84d021e6d 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -21,35 +21,35 @@ Layout QuarticModel::layout() {
   if (m_layout.isUninitialized()) {
     constexpr int size = 20;
     Layout layoutChildren[size] = {
-      CodePointLayout::Builder('a', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('a', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('4', KDFont::SmallFont),
+          CodePointLayout::Builder('4', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('b', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('b', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('3', KDFont::SmallFont),
+          CodePointLayout::Builder('3', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('c', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('c', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
-          CodePointLayout::Builder('2', KDFont::SmallFont),
+          CodePointLayout::Builder('2', k_layoutFont),
           VerticalOffsetLayoutNode::Type::Superscript
         ),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('d', KDFont::SmallFont),
-      CodePointLayout::Builder(UCodePointMiddleDot, KDFont::SmallFont),
-      CodePointLayout::Builder('X', KDFont::SmallFont),
-      CodePointLayout::Builder('+', KDFont::SmallFont),
-      CodePointLayout::Builder('e', KDFont::SmallFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('d', k_layoutFont),
+      CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
+      CodePointLayout::Builder('X', k_layoutFont),
+      CodePointLayout::Builder('+', k_layoutFont),
+      CodePointLayout::Builder('e', k_layoutFont),
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, size);
   }
diff --git a/apps/regression/model/trigonometric_model.cpp b/apps/regression/model/trigonometric_model.cpp
index 7e54a70c7..d090ede6b 100644
--- a/apps/regression/model/trigonometric_model.cpp
+++ b/apps/regression/model/trigonometric_model.cpp
@@ -19,7 +19,7 @@ namespace Regression {
 Layout TrigonometricModel::layout() {
   if (m_layout.isUninitialized()) {
     const char * s = "a·sin(b·X+c)+d";
-    m_layout = LayoutHelper::String(s, strlen(s), KDFont::SmallFont);
+    m_layout = LayoutHelper::String(s, strlen(s), k_layoutFont);
   }
   return m_layout;
 }

From 67e460eadafc9de3c773a5727611b57ac0069a51 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 11:59:53 +0100
Subject: [PATCH 146/295] [apps/settings] Factorize layout font sizes

---
 .../sub_menu/preferences_controller.cpp       | 26 +++++++++----------
 .../sub_menu/preferences_controller.h         |  2 ++
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index a20c3b45f..56473f890 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -49,55 +49,55 @@ int PreferencesController::reusableCellCount(int type) {
   return k_totalNumberOfCell;
 }
 
-Layout layoutForPreferences(I18n::Message message) {
+Layout PreferencesController::layoutForPreferences(I18n::Message message) {
   switch (message) {
     // Angle Unit
     case I18n::Message::Degres:
     {
       const char * degEx = "90°";
-      return LayoutHelper::String("90°", strlen(degEx), KDFont::SmallFont);
+      return LayoutHelper::String("90°", strlen(degEx), k_layoutFont);
     }
     case I18n::Message::Radian:
     {
       const char * pi = "π";
       return FractionLayout::Builder(
-          LayoutHelper::String(pi, sizeof(pi), KDFont::SmallFont),
-          LayoutHelper::String("2", 1, KDFont::SmallFont)
+          LayoutHelper::String(pi, sizeof(pi), k_layoutFont),
+          LayoutHelper::String("2", 1, k_layoutFont)
         );
     }
     // Display Mode format
     case I18n::Message::Decimal:
-      return LayoutHelper::String("12.34", 5, KDFont::SmallFont);
+      return LayoutHelper::String("12.34", 5, k_layoutFont);
     case I18n::Message::Scientific:
     {
       const char * text = "1.234ᴇ1";
-      return LayoutHelper::String(text, strlen(text), KDFont::SmallFont);
+      return LayoutHelper::String(text, strlen(text), k_layoutFont);
     }
     // Edition mode
     case I18n::Message::Edition2D:
       return HorizontalLayout::Builder(
-          LayoutHelper::String("1+", 2, KDFont::SmallFont),
-          FractionLayout::Builder(LayoutHelper::String("2", 1, KDFont::SmallFont), LayoutHelper::String("3", 1, KDFont::SmallFont))
+          LayoutHelper::String("1+", 2, k_layoutFont),
+          FractionLayout::Builder(LayoutHelper::String("2", 1, k_layoutFont), LayoutHelper::String("3", 1, k_layoutFont))
         );
     case I18n::Message::EditionLinear:
-      return LayoutHelper::String("1+2/3", 5, KDFont::SmallFont);
+      return LayoutHelper::String("1+2/3", 5, k_layoutFont);
     // Complex format
     case I18n::Message::Real:
     {
-      return CodePointLayout::Builder('x', KDFont::SmallFont);
+      return CodePointLayout::Builder('x', k_layoutFont);
     }
     case I18n::Message::Cartesian:
     {
       const char * text = "a+𝐢b";
-      return LayoutHelper::String(text, strlen(text), KDFont::SmallFont);
+      return LayoutHelper::String(text, strlen(text), k_layoutFont);
     }
     case I18n::Message::Polar:
     {
       const char * base = "rℯ";
       const char * superscript = "𝐢θ";
       return HorizontalLayout::Builder(
-          LayoutHelper::String(base, strlen(base), KDFont::SmallFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, strlen(superscript), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript)
+          LayoutHelper::String(base, strlen(base), k_layoutFont),
+          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, strlen(superscript), k_layoutFont), VerticalOffsetLayoutNode::Type::Superscript)
         );
     }
     default:
diff --git a/apps/settings/sub_menu/preferences_controller.h b/apps/settings/sub_menu/preferences_controller.h
index 5648feccb..c2a860cf7 100644
--- a/apps/settings/sub_menu/preferences_controller.h
+++ b/apps/settings/sub_menu/preferences_controller.h
@@ -17,6 +17,8 @@ public:
 protected:
   constexpr static int k_totalNumberOfCell = 3;
 private:
+  constexpr static const KDFont * k_layoutFont = KDFont::SmallFont;
+  Poincare::Layout layoutForPreferences(I18n::Message message);
   void setPreferenceWithValueIndex(I18n::Message message, int valueIndex);
   int valueIndexForPreference(I18n::Message message);
   MessageTableCellWithExpression m_cells[k_totalNumberOfCell];

From d9c96c3cf7d01de04d45161962319d673b17b6b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 12:07:58 +0100
Subject: [PATCH 147/295] [apps/settings] Clean unicode layout creations

---
 apps/settings/sub_menu/preferences_controller.cpp | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index 56473f890..40edf9737 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -55,16 +55,13 @@ Layout PreferencesController::layoutForPreferences(I18n::Message message) {
     case I18n::Message::Degres:
     {
       const char * degEx = "90°";
-      return LayoutHelper::String("90°", strlen(degEx), k_layoutFont);
+      return LayoutHelper::String(degEx, strlen(degEx), k_layoutFont);
     }
     case I18n::Message::Radian:
-    {
-      const char * pi = "π";
       return FractionLayout::Builder(
-          LayoutHelper::String(pi, sizeof(pi), k_layoutFont),
-          LayoutHelper::String("2", 1, k_layoutFont)
-        );
-    }
+          CodePointLayout::Builder(UCodePointGreekSmallLetterPi, k_layoutFont),
+          CodePointLayout::Builder('2', k_layoutFont));
+
     // Display Mode format
     case I18n::Message::Decimal:
       return LayoutHelper::String("12.34", 5, k_layoutFont);
@@ -73,6 +70,7 @@ Layout PreferencesController::layoutForPreferences(I18n::Message message) {
       const char * text = "1.234ᴇ1";
       return LayoutHelper::String(text, strlen(text), k_layoutFont);
     }
+
     // Edition mode
     case I18n::Message::Edition2D:
       return HorizontalLayout::Builder(
@@ -81,11 +79,10 @@ Layout PreferencesController::layoutForPreferences(I18n::Message message) {
         );
     case I18n::Message::EditionLinear:
       return LayoutHelper::String("1+2/3", 5, k_layoutFont);
+
     // Complex format
     case I18n::Message::Real:
-    {
       return CodePointLayout::Builder('x', k_layoutFont);
-    }
     case I18n::Message::Cartesian:
     {
       const char * text = "a+𝐢b";

From 379f09885890926b1720ab6c79df99ae6205e3fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 12:08:57 +0100
Subject: [PATCH 148/295] [apps/settings] Coding style

---
 apps/settings/sub_menu/preferences_controller.cpp | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index 40edf9737..fb53112d4 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -119,14 +119,11 @@ void PreferencesController::setPreferenceWithValueIndex(I18n::Message message, i
   Preferences * preferences = Preferences::sharedPreferences();
   if (message == I18n::Message::AngleUnit) {
     preferences->setAngleUnit((Preferences::AngleUnit)valueIndex);
-  }
-  if (message == I18n::Message::DisplayMode) {
+  } else if (message == I18n::Message::DisplayMode) {
     preferences->setDisplayMode((Preferences::PrintFloatMode)valueIndex);
-  }
-  if (message == I18n::Message::EditionMode) {
+  } else if (message == I18n::Message::EditionMode) {
     preferences->setEditionMode((Preferences::EditionMode)valueIndex);
-  }
-  if (message == I18n::Message::ComplexFormat) {
+  } else if (message == I18n::Message::ComplexFormat) {
     preferences->setComplexFormat((Preferences::ComplexFormat)valueIndex);
   }
 }

From 1d26e6da734747eb282a22264348c538d70c04d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 14:49:11 +0100
Subject: [PATCH 149/295] [ion/unicode] Clean special code points

---
 apps/graph/cartesian_function_store.h         |  4 +--
 apps/sequence/list/list_controller.cpp        |  2 +-
 apps/sequence/sequence.cpp                    |  6 ++++-
 apps/sequence/sequence.h                      |  2 +-
 apps/sequence/sequence_store.h                |  4 +--
 apps/shared/cartesian_function.cpp            | 26 ++++++++++++++-----
 apps/shared/cartesian_function.h              |  6 ++---
 apps/shared/expression_model.cpp              |  2 +-
 apps/shared/expression_model.h                |  2 +-
 .../expression_model_list_controller.cpp      |  2 +-
 apps/shared/expression_model_store.h          |  4 +--
 apps/shared/function.cpp                      | 14 +++++-----
 apps/shared/function.h                        |  8 +++---
 apps/shared/sum_graph_controller.cpp          |  2 +-
 ion/include/ion/unicode/code_point.h          | 23 ++++++----------
 poincare/include/poincare/symbol.h            | 12 +++------
 poincare/src/fraction_layout.cpp              |  2 +-
 poincare/src/function.cpp                     |  8 +++---
 poincare/src/store.cpp                        |  4 +--
 poincare/src/symbol.cpp                       | 17 +++++++++---
 poincare/src/symbol_abstract.cpp              |  2 +-
 poincare/src/trigonometry.cpp                 |  6 ++++-
 poincare/test/properties.cpp                  | 22 ++++++++--------
 poincare/test/user_variable.cpp               | 14 ++++++----
 24 files changed, 108 insertions(+), 86 deletions(-)

diff --git a/apps/graph/cartesian_function_store.h b/apps/graph/cartesian_function_store.h
index cd47572ae..f2ff11601 100644
--- a/apps/graph/cartesian_function_store.h
+++ b/apps/graph/cartesian_function_store.h
@@ -11,8 +11,8 @@ namespace Graph {
 class CartesianFunctionStore : public Shared::FunctionStore {
 public:
   Shared::ExpiringPointer<Shared::CartesianFunction> modelForRecord(Ion::Storage::Record record) const { return Shared::ExpiringPointer<Shared::CartesianFunction>(static_cast<Shared::CartesianFunction *>(privateModelForRecord(record))); }
-  char symbol() const override { return Shared::CartesianFunction::Symbol(); }
-  char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownX; }
+  CodePoint symbol() const override { return Shared::CartesianFunction::Symbol(); }
+  CodePoint unknownSymbol() const override { return UCodePointUnknownX; }
 private:
   Ion::Storage::Record::ErrorStatus addEmptyModel() override;
   const char * modelExtension() const override { return Ion::Storage::funcExtension; }
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 08aab769f..3a38c38a7 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -104,7 +104,7 @@ void ListController::editExpression(int sequenceDefinition, Ion::Events::Event e
         break;
     }
     initialText = initialTextContent;
-    // Replace Poincare::Symbol::SpecialSymbols::UnknownN with 'n'
+    // Replace UCodePointUnknownN with 'n'
     replaceUnknownSymbolWithReadableSymbol(initialText);
   }
   App * myApp = (App *)app();
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 4f4272b15..02701e9fd 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -122,7 +122,11 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
   if (n < initialRank() || n < 0) {
     return NAN;
   }
-  const char unknownN[2] = {Poincare::Symbol::SpecialSymbols::UnknownN, 0};
+  constexpr int bufferSize = 5;
+  char unknownN[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownN, unknownN, bufferSize);
+  assert(codePointSize <= bufferSize - 1);
+  unknownN[codePointSize] = 0;
   CacheContext<T> ctx = CacheContext<T>(sqctx);
   T un = sqctx->valueOfSequenceAtPreviousRank<T>(0, 0);
   T unm1 = sqctx->valueOfSequenceAtPreviousRank<T>(0, 1);
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 61e43386e..e931da391 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -32,7 +32,7 @@ public:
   void setInitialRank(int rank);
   // Definition
   Poincare::Layout definitionName() { return m_definition.name(this); }
-  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownN); }
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), UCodePointUnknownN); }
   // First initial condition
   Poincare::Layout firstInitialConditionName() { return m_firstInitialCondition.name(this); }
   void firstInitialConditionText(char * buffer, size_t bufferSize) const { return m_firstInitialCondition.text(this, buffer, bufferSize); }
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index b13f6c376..3bfb94e9f 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -12,8 +12,8 @@ namespace Sequence {
 class SequenceStore : public Shared::FunctionStore {
 public:
   using Shared::FunctionStore::FunctionStore;
-  char symbol() const override { return Sequence::Symbol(); }
-  char unknownSymbol() const override { return Poincare::Symbol::SpecialSymbols::UnknownN; }
+  CodePoint symbol() const override { return Sequence::Symbol(); }
+  CodePoint unknownSymbol() const override { return UCodePointUnknownN; }
   /* Sequence Store hold all its Sequences in an array. The Sequence pointers
    * return by modelForRecord are therefore non-expirable. We choose to return
    * Sequence * instead of ExpiringPointer<Sequence>. */
diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index bc42ae84d..7faa5492e 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -64,7 +64,7 @@ CartesianFunction CartesianFunction::NewModel(Ion::Storage::Record::ErrorStatus
   return CartesianFunction(Ion::Storage::sharedStorage()->recordBaseNamedWithExtension(baseName, Ion::Storage::funcExtension));
 }
 
-int CartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg) {
+int CartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSize, CodePoint arg) {
   // Fill buffer with f(x). Keep size for derivative sign.
   int derivativeSize = UTF8Decoder::CharSizeOfCodePoint('\'');
   int numberOfChars = nameWithArgument(buffer, bufferSize - derivativeSize, arg);
@@ -87,7 +87,7 @@ void CartesianFunction::setDisplayDerivative(bool display) {
 }
 
 double CartesianFunction::approximateDerivative(double x, Poincare::Context * context) const {
-  Poincare::Derivative derivative = Poincare::Derivative::Builder(expressionReduced(context).clone(), Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Poincare::Float<double>::Builder(x)); // derivative takes ownership of Poincare::Float<double>::Builder(x) and the clone of expression
+  Poincare::Derivative derivative = Poincare::Derivative::Builder(expressionReduced(context).clone(), Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(x)); // derivative takes ownership of Poincare::Float<double>::Builder(x) and the clone of expression
   /* TODO: when we approximate derivative, we might want to simplify the
    * derivative here. However, we might want to do it once for all x (to avoid
    * lagging in the derivative table. */
@@ -96,7 +96,7 @@ double CartesianFunction::approximateDerivative(double x, Poincare::Context * co
 
 double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
   // TODO: this does not work yet because integral does not understand UnknownX
-  Poincare::Integral integral = Poincare::Integral::Builder(expressionReduced(context).clone(), Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Integral takes ownership of args
+  Poincare::Integral integral = Poincare::Integral::Builder(expressionReduced(context).clone(), Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(start), Poincare::Float<double>::Builder(end)); // Integral takes ownership of args
   /* TODO: when we approximate integral, we might want to simplify the integral
    * here. However, we might want to do it once for all x (to avoid lagging in
    * the derivative table. */
@@ -104,22 +104,34 @@ double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::C
 }
 
 Expression::Coordinate2D CartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
-  const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
+  constexpr int bufferSize = 3;
+  char unknownX[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
+  assert(codePointSize <= bufferSize);
   return PoincareHelpers::NextMinimum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 Expression::Coordinate2D CartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
-  const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
+  constexpr int bufferSize = 3;
+  char unknownX[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
+  assert(codePointSize <= bufferSize);
   return PoincareHelpers::NextMaximum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 double CartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
-  const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
+  constexpr int bufferSize = 3;
+  char unknownX[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
+  assert(codePointSize <= bufferSize);
   return PoincareHelpers::NextRoot(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 Expression::Coordinate2D CartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Expression e) const {
-  const char unknownX[2] = {Poincare::Symbol::UnknownX, 0};
+  constexpr int bufferSize = 3;
+  char unknownX[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
+  assert(codePointSize <= bufferSize);
   return PoincareHelpers::NextIntersection(expressionReduced(context), unknownX, start, step, max, *context, e);
 }
 
diff --git a/apps/shared/cartesian_function.h b/apps/shared/cartesian_function.h
index 0990816ca..899a4d1c6 100644
--- a/apps/shared/cartesian_function.h
+++ b/apps/shared/cartesian_function.h
@@ -10,17 +10,17 @@ namespace Shared {
 class CartesianFunction : public Function {
 public:
   static void DefaultName(char buffer[], size_t bufferSize);
-  static char Symbol() { return 'x'; }
+  static CodePoint Symbol() { return 'x'; }
   static CartesianFunction NewModel(Ion::Storage::Record::ErrorStatus * error, const char * baseName = nullptr);
   CartesianFunction(Ion::Storage::Record record = Record()) :
     Function(record)
   {}
-  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), Poincare::Symbol::SpecialSymbols::UnknownX); }
+  Ion::Storage::Record::ErrorStatus setContent(const char * c) override { return editableModel()->setContent(this, c, Symbol(), UCodePointUnknownX); }
 
   // Derivative
   bool displayDerivative() const;
   void setDisplayDerivative(bool display);
-  int derivativeNameWithArgument(char * buffer, size_t bufferSize, char arg);
+  int derivativeNameWithArgument(char * buffer, size_t bufferSize, CodePoint arg);
   double approximateDerivative(double x, Poincare::Context * context) const;
   // Integral
   double sumBetweenBounds(double start, double end, Poincare::Context * context) const override;
diff --git a/apps/shared/expression_model.cpp b/apps/shared/expression_model.cpp
index 54f7b7f28..142b9b4b7 100644
--- a/apps/shared/expression_model.cpp
+++ b/apps/shared/expression_model.cpp
@@ -65,7 +65,7 @@ Layout ExpressionModel::layout(const Storage::Record * record) const {
   return m_layout;
 }
 
-Ion::Storage::Record::ErrorStatus ExpressionModel::setContent(Ion::Storage::Record * record, const char * c, char symbol, char unknownSymbol) {
+Ion::Storage::Record::ErrorStatus ExpressionModel::setContent(Ion::Storage::Record * record, const char * c, CodePoint symbol, CodePoint unknownSymbol) {
   Expression e = ExpressionModel::BuildExpressionFromText(c, symbol, unknownSymbol);
   return setExpressionContent(record, e);
 }
diff --git a/apps/shared/expression_model.h b/apps/shared/expression_model.h
index 265a7b721..ab940071b 100644
--- a/apps/shared/expression_model.h
+++ b/apps/shared/expression_model.h
@@ -18,7 +18,7 @@ public:
   Poincare::Layout layout(const Ion::Storage::Record * record) const;
 
   // Setters
-  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, char symbol = 0, char unknownSymbol = 0);
+  virtual Ion::Storage::Record::ErrorStatus setContent(Ion::Storage::Record * record, const char * c, CodePoint symbol = 0, CodePoint unknownSymbol = 0);
   Ion::Storage::Record::ErrorStatus setExpressionContent(Ion::Storage::Record * record, Poincare::Expression & e);
 
   // Property
diff --git a/apps/shared/expression_model_list_controller.cpp b/apps/shared/expression_model_list_controller.cpp
index 47a145611..fe4a33aa4 100644
--- a/apps/shared/expression_model_list_controller.cpp
+++ b/apps/shared/expression_model_list_controller.cpp
@@ -233,7 +233,7 @@ void ExpressionModelListController::editExpression(Ion::Events::Event event) {
     ExpiringPointer<ExpressionModelHandle> model = modelStore()->modelForRecord(record);
     model->text(initialTextContent, initialTextContentMaxSize);
     initialText = initialTextContent;
-    // Replace Poincare::Symbol::SpecialSymbols::UnknownX with 'x'
+    // Replace UCodePointUnknownX with 'x'
     replaceUnknownSymbolWithReadableSymbol(initialTextContent);
   }
   inputController()->edit(this, event, this, initialText,
diff --git a/apps/shared/expression_model_store.h b/apps/shared/expression_model_store.h
index a280bf7e7..31b93dd3f 100644
--- a/apps/shared/expression_model_store.h
+++ b/apps/shared/expression_model_store.h
@@ -14,8 +14,8 @@ class ExpressionModelStore {
   // TODO find better name (once we remove ExpressionModelStore?)
 public:
   ExpressionModelStore();
-  virtual char symbol() const { return 0; }
-  virtual char unknownSymbol() const { return 0; }
+  virtual CodePoint symbol() const { return 0; }
+  virtual CodePoint unknownSymbol() const { return 0; }
 
   // Getters
   // By default, the number of models is not bounded
diff --git a/apps/shared/function.cpp b/apps/shared/function.cpp
index ea76cf015..bc454ed42 100644
--- a/apps/shared/function.cpp
+++ b/apps/shared/function.cpp
@@ -64,18 +64,20 @@ void Function::setActive(bool active) {
   recordData()->setActive(active);
 }
 
-int Function::nameWithArgument(char * buffer, size_t bufferSize, char arg) {
+int Function::nameWithArgument(char * buffer, size_t bufferSize, CodePoint arg) {
+  assert(UTF8Decoder::CharSizeOfCodePoint(arg) == 1);
   const char * functionName = fullName();
   size_t baseNameLength = SymbolAbstract::TruncateExtension(buffer, functionName, bufferSize - k_parenthesedArgumentLength);
   int result = baseNameLength + strlcpy(&buffer[baseNameLength], k_parenthesedArgument, bufferSize-baseNameLength);
-  if (baseNameLength+1 < bufferSize - 1) {
-    buffer[baseNameLength+1] = arg;
+  int bufferRemainingSize = bufferSize - (baseNameLength+1);
+  if (bufferRemainingSize > 0) {
+    UTF8Decoder::CodePointToChars(arg, buffer+baseNameLength+1, bufferRemainingSize);
   }
   return result;
 }
 
 template<typename T>
-T Function::templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const {
+T Function::templatedApproximateAtAbscissa(T x, Poincare::Context * context, CodePoint unknownSymbol) const {
   if (isCircularlyDefined(context)) {
     return NAN;
   }
@@ -93,5 +95,5 @@ Function::FunctionRecordDataBuffer * Function::recordData() const {
 
 }
 
-template float Shared::Function::templatedApproximateAtAbscissa<float>(float, Poincare::Context*, char) const;
-template double Shared::Function::templatedApproximateAtAbscissa<double>(double, Poincare::Context*, char) const;
+template float Shared::Function::templatedApproximateAtAbscissa<float>(float, Poincare::Context*, CodePoint) const;
+template double Shared::Function::templatedApproximateAtAbscissa<double>(double, Poincare::Context*, CodePoint) const;
diff --git a/apps/shared/function.h b/apps/shared/function.h
index 1148ed54d..a957dc45d 100644
--- a/apps/shared/function.h
+++ b/apps/shared/function.h
@@ -29,14 +29,14 @@ public:
   void setActive(bool active);
 
   // Name
-  int nameWithArgument(char * buffer, size_t bufferSize, char arg);
+  int nameWithArgument(char * buffer, size_t bufferSize, CodePoint arg);
 
   // Evaluation
   virtual float evaluateAtAbscissa(float x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context, Poincare::Symbol::SpecialSymbols::UnknownX);
+    return templatedApproximateAtAbscissa(x, context, UCodePointUnknownX);
   }
   virtual double evaluateAtAbscissa(double x, Poincare::Context * context) const {
-    return templatedApproximateAtAbscissa(x, context, Poincare::Symbol::SpecialSymbols::UnknownX);
+    return templatedApproximateAtAbscissa(x, context, UCodePointUnknownX);
   }
   virtual double sumBetweenBounds(double start, double end, Poincare::Context * context) const = 0;
 protected:
@@ -60,7 +60,7 @@ protected:
     bool m_active;
   };
 private:
-  template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context, char unknownSymbol) const;
+  template<typename T> T templatedApproximateAtAbscissa(T x, Poincare::Context * context, CodePoint unknownSymbol) const;
   FunctionRecordDataBuffer * recordData() const;
 };
 
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index c2e79a7be..5d18a4106 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -235,7 +235,7 @@ void SumGraphController::LegendView::setEditableZone(double d) {
 void SumGraphController::LegendView::setSumSymbol(Step step, double start, double end, double result, Layout functionLayout) {
   assert(step == Step::Result || functionLayout.isUninitialized());
   constexpr int sigmaLength = 2;
-  const CodePoint sigma[sigmaLength] = {UCodePointSpace, m_sumSymbol};
+  const CodePoint sigma[sigmaLength] = {' ', m_sumSymbol};
   if (step == Step::FirstParameter) {
     m_sumLayout = LayoutHelper::CodePointString(sigma, sigmaLength);
   } else if (step == Step::SecondParameter) {
diff --git a/ion/include/ion/unicode/code_point.h b/ion/include/ion/unicode/code_point.h
index b5b409b42..c069f7e39 100644
--- a/ion/include/ion/unicode/code_point.h
+++ b/ion/include/ion/unicode/code_point.h
@@ -16,38 +16,31 @@ private:
   uint32_t m_code;
 };
 
-
-// TODO LEA Remove unneeded values
 static constexpr CodePoint UCodePointNull                     = 0x0;
+
+/* 0x1 and 0x2 represent soh and stx. They are not used, so we can use them for
+ * another purpose */
+static constexpr CodePoint UCodePointUnknownX                 = 0x1;
+static constexpr CodePoint UCodePointUnknownN                 = 0x2;
+
 static constexpr CodePoint UCodePointTabulation               = 0x9;
 static constexpr CodePoint UCodePointLineFeed                 = 0xa;
 
-/* 0x11, 0x12, 0x13, 0x14 represent DEVICE CONTROL ONE TO FOUR. They are not
- * used, so we can use them for another purpose */
+/* 0x11, 0x12, 0x13 represent DEVICE CONTROL ONE TO THREE. They are not used, so
+ * we can use them for another purpose */
 static constexpr CodePoint UCodePointEmpty                    = 0x11; // Used to be parsed into EmptyExpression
 static constexpr CodePoint UCodePointLeftSuperscript          = 0x12; // Used to parse Power
 static constexpr CodePoint UCodePointRightSuperscript         = 0x13; // Used to parse Power
-static constexpr CodePoint UCodePointUnknownX                 = 0x14; // Used to store expressions
 
-static constexpr CodePoint UCodePointSpace                    = 0x20;    //
-static constexpr CodePoint UCodePointDegree                   = 0xb0;    // °
 static constexpr CodePoint UCodePointMiddleDot                = 0xb7;    // ·
 static constexpr CodePoint UCodePointMultiplicationSign       = 0xd7;    // ×
-static constexpr CodePoint UCodePointGreekCapitalLetterGamma  = 0x393;   // Γ
-static constexpr CodePoint UCodePointGreekCapitalLetterDelta  = 0x394;   // Δ
-static constexpr CodePoint UCodePointGreekSmallLetterTheta    = 0x3b8;   // θ
-static constexpr CodePoint UCodePointGreekSmallLetterLambda   = 0x3bb;   // λ
 static constexpr CodePoint UCodePointGreekSmallLetterPi       = 0x3c0;   // π
-static constexpr CodePoint UCodePointGreekSmallLetterSigma    = 0x3c3;   // σ
 static constexpr CodePoint UCodePointLatinLetterSmallCapitalE = 0x1d07;  // ᴇ
 static constexpr CodePoint UCodePointScriptSmallE             = 0x212f;  // ℯ
 static constexpr CodePoint UCodePointRightwardsArrow          = 0x2192;  // →
 static constexpr CodePoint UCodePointNArySummation            = 0x2211;  // ∑
 static constexpr CodePoint UCodePointSquareRoot               = 0x221a;  // √
 static constexpr CodePoint UCodePointIntegral                 = 0x222b;  // ∫
-static constexpr CodePoint UCodePointAlmostEqualTo            = 0x2248;  // ≈
-static constexpr CodePoint UCodePointLessThanOrEqualTo        = 0x2264;  // ≤
-static constexpr CodePoint UCodePointGreaterThanOrEqualTo     = 0x2265;  // ≥
 static constexpr CodePoint UCodePointMathematicalBoldSmallI   = 0x1d422; // 𝐢
 
 #endif
diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index 3763c722f..9abfdc876 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -43,7 +43,7 @@ public:
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
 
-  bool isUnknown(char unknownSymbol) const;
+  bool isUnknown(CodePoint unknownSymbol) const;
 private:
   char m_name[0]; // MUST be the last member variable
 
@@ -58,20 +58,14 @@ class Symbol final : public SymbolAbstract {
 public:
   static constexpr int k_ansLength = 3;
   static constexpr char k_ans[k_ansLength+1] = "ans";
-  enum SpecialSymbols : char {
-    /* We can use characters from 1 to 31 as they do not correspond to usual
-     * characters but events as 'end of text', 'backspace'... */
-    UnknownX = 1, //TODO LEA make sure there is no collision with the code points
-    UnknownN = 2 //TODO LEA make sure there is no collision with the code points,
-  };
   Symbol(const SymbolNode * node) : SymbolAbstract(node) {}
   static Symbol Builder(const char * name, int length) { return SymbolAbstract::Builder<Symbol, SymbolNode>(name, length); }
-  static Symbol Builder(char name) { return Symbol::Builder(&name, 1); }
+  static Symbol Builder(CodePoint name);
   static Symbol Ans() { return Symbol::Builder(k_ans, k_ansLength); }
   static Expression UntypedBuilder(const char * name, size_t length, Context * context);
 
   // Symbol properties
-  bool isSystemSymbol() const { return node()->isUnknown(Symbol::SpecialSymbols::UnknownX) || node()->isUnknown(Symbol::SpecialSymbols::UnknownN); }
+  bool isSystemSymbol() const { return node()->isUnknown(UCodePointUnknownX) || node()->isUnknown(UCodePointUnknownN); }
   static bool isSeriesSymbol(const char * c);
   static bool isRegressionSymbol(const char * c);
 
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 30d4b2a78..8b6c85f9c 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -215,4 +215,4 @@ void FractionLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionCo
   ctx->fillRect(KDRect(p.x()+Metric::FractionAndConjugateHorizontalMargin, fractionLineY, layoutSize().width()-2*Metric::FractionAndConjugateHorizontalMargin, k_fractionLineHeight), expressionColor);
 }
 
-}
\ No newline at end of file
+}
diff --git a/poincare/src/function.cpp b/poincare/src/function.cpp
index 50ed7e0b2..53b4a87d7 100644
--- a/poincare/src/function.cpp
+++ b/poincare/src/function.cpp
@@ -116,7 +116,7 @@ Expression Function::replaceSymbolWithExpression(const SymbolAbstract & symbol,
   if (symbol.type() == ExpressionNode::Type::Function && strcmp(name(), symbol.name()) == 0) {
     Expression value = expression.clone();
     // Replace the unknown in the new expression by the function's child
-    Symbol xSymbol = Symbol::Builder(Symbol::SpecialSymbols::UnknownX);
+    Symbol xSymbol = Symbol::Builder(UCodePointUnknownX);
     Expression xValue = childAtIndex(0);
     value = value.replaceSymbolWithExpression(xSymbol, xValue);
     Expression p = parent();
@@ -144,7 +144,7 @@ Expression Function::shallowReplaceReplaceableSymbols(Context & context) {
   if (e.isUninitialized()) {
     return *this;
   }
-  e.replaceSymbolWithExpression(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), childAtIndex(0));
+  e.replaceSymbolWithExpression(Symbol::Builder(UCodePointUnknownX), childAtIndex(0));
   replaceWithInPlace(e);
   return e;
 }
@@ -152,9 +152,9 @@ Expression Function::shallowReplaceReplaceableSymbols(Context & context) {
 // TODO: should we avoid replacing unknown X in-place but use a context instead?
 #if 0
 VariableContext Function::unknownXContext(Context & parentContext) const {
-  Symbol unknownXSymbol = Symbol::Builder(Symbol::SpecialSymbols::UnknownX);
+  Symbol unknownXSymbol = Symbol::Builder(UCodePointUnknownX);
   Expression child = childAtIndex(0);
-  const char x[] = {Symbol::SpecialSymbols::UnknownX, 0};
+  const char x[] = {UCodePointUnknownX, 0}; // UGLY, use decoder
   /* COMMENT */
   if (child.type() == ExpressionNode::Type::Symbol && static_cast<Symbol &>(child).isSystemSymbol()) {
     return parentContext;
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 12e7d917f..46fbacbbe 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -78,7 +78,7 @@ Expression Store::storeValueForSymbol(Context& context, Preferences::ComplexForm
     // In tata + 2 ->f(tata), replace tata with xUnknown symbol
     assert(symbol().childAtIndex(0).type() == ExpressionNode::Type::Symbol);
     Expression userDefinedUnknown = symbol().childAtIndex(0);
-    Symbol xUnknown = Symbol::Builder(Symbol::SpecialSymbols::UnknownX);
+    Symbol xUnknown = Symbol::Builder(UCodePointUnknownX);
     finalValue = childAtIndex(0).replaceSymbolWithExpression(static_cast<Symbol &>(userDefinedUnknown), xUnknown);
   } else {
     assert(symbol().type() == ExpressionNode::Type::Symbol);
@@ -95,7 +95,7 @@ Expression Store::storeValueForSymbol(Context& context, Preferences::ComplexForm
     // Replace the xUnknown symbol with the variable initially used
     assert(symbol().childAtIndex(0).type() == ExpressionNode::Type::Symbol);
     Expression userDefinedUnknown = symbol().childAtIndex(0);
-    Symbol xUnknown = Symbol::Builder(Symbol::SpecialSymbols::UnknownX);
+    Symbol xUnknown = Symbol::Builder(UCodePointUnknownX);
     storedExpression = storedExpression.replaceSymbolWithExpression(xUnknown, static_cast<Symbol &>(userDefinedUnknown));
   }
   return storedExpression;
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 6074089bc..a0711dc46 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -7,6 +7,7 @@
 #include <poincare/rational.h>
 #include <poincare/undefined.h>
 #include <poincare/vertical_offset_layout.h>
+#include <ion/unicode/utf8_decoder.h>
 #include <ion/unicode/utf8_helper.h>
 #include <cmath>
 #include <assert.h>
@@ -66,7 +67,7 @@ int SymbolNode::getVariables(Context & context, isVariableTest isVariable, char
 }
 
 float SymbolNode::characteristicXRange(Context & context, Preferences::AngleUnit angleUnit) const {
-  return isUnknown(Symbol::SpecialSymbols::UnknownX) ? NAN : 0.0f;
+  return isUnknown(UCodePointUnknownX) ? NAN : 0.0f;
 }
 
 bool SymbolNode::isReal(Context & context) const {
@@ -75,10 +76,10 @@ bool SymbolNode::isReal(Context & context) const {
 }
 
 Layout SymbolNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  if (isUnknown(Symbol::SpecialSymbols::UnknownX)) {
+  if (isUnknown(UCodePointUnknownX)) {
     return CodePointLayout::Builder('x');
   }
-  if (isUnknown(Symbol::SpecialSymbols::UnknownN)) {
+  if (isUnknown(UCodePointUnknownN)) {
     return CodePointLayout::Builder('n');
   }
   // TODO return Parse(m_name).createLayout() ?
@@ -147,7 +148,7 @@ Expression Symbol::UntypedBuilder(const char * name, size_t length, Context * co
   return Expression();
 }
 
-bool SymbolNode::isUnknown(char unknownSymbol) const {
+bool SymbolNode::isUnknown(CodePoint unknownSymbol) const {
   bool result = UTF8Helper::CodePointIs(m_name, unknownSymbol);
   if (result) {
     assert(m_name[1] == 0);
@@ -155,6 +156,14 @@ bool SymbolNode::isUnknown(char unknownSymbol) const {
   return result;
 }
 
+Symbol Symbol::Builder(CodePoint name) {
+  constexpr int bufferSize = 5;
+  char buffer[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(name, buffer, bufferSize);
+  assert(codePointSize <= bufferSize);
+  return Symbol::Builder(buffer, codePointSize);
+}
+
 bool Symbol::isSeriesSymbol(const char * c) {
   // [NV][1-3]
   if (c[2] == 0 && (c[0] == 'N' || c[0] == 'V') && c[1] >= '1' && c[1] <= '3') {
diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index 27f53ffce..412ef5d43 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -66,7 +66,7 @@ Expression SymbolAbstract::Expand(const SymbolAbstract & symbol, Context & conte
   e = Expression::ExpressionWithoutSymbols(e, context);
   if (!e.isUninitialized() && isFunction) {
     // TODO: when SequenceFunction is created, we want to specify which unknown variable to replace (UnknownX or UnknownN)
-    e = e.replaceSymbolWithExpression(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), symbol.childAtIndex(0));
+    e = e.replaceSymbolWithExpression(Symbol::Builder(UCodePointUnknownX), symbol.childAtIndex(0));
   }
   return e;
 }
diff --git a/poincare/src/trigonometry.cpp b/poincare/src/trigonometry.cpp
index 5503cbc82..2c7403a5a 100644
--- a/poincare/src/trigonometry.cpp
+++ b/poincare/src/trigonometry.cpp
@@ -22,7 +22,11 @@ namespace Poincare {
 
 float Trigonometry::characteristicXRange(const Expression & e, Context & context, Preferences::AngleUnit angleUnit) {
   assert(e.numberOfChildren() == 1);
-  const char x[] = {Symbol::SpecialSymbols::UnknownX, 0};
+  constexpr int size = 5;
+  char x[size];
+  int zeroIndex = UTF8Decoder::CodePointToChars(UCodePointUnknownX, x, size);
+  assert(zeroIndex <= size - 1);
+  x[zeroIndex] = 0;
   int d = e.childAtIndex(0).polynomialDegree(context, x);
   if (d < 0 || d > 1) {
     // child(0) is not linear so we cannot easily find an interesting range
diff --git a/poincare/test/properties.cpp b/poincare/test/properties.cpp
index c122a1020..4f1cea9e4 100644
--- a/poincare/test/properties.cpp
+++ b/poincare/test/properties.cpp
@@ -76,19 +76,19 @@ void assert_expression_has_characteristic_range(Expression e, float range, Prefe
 }
 
 QUIZ_CASE(poincare_characteristic_range) {
-  assert_expression_has_characteristic_range(Cosine::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)), 360.0f);
-  assert_expression_has_characteristic_range(Cosine::Builder(Opposite::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX))), 360.0f);
-  assert_expression_has_characteristic_range(Cosine::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)), 2.0f*M_PI, Preferences::AngleUnit::Radian);
-  assert_expression_has_characteristic_range(Cosine::Builder(Opposite::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX))), 2.0f*M_PI, Preferences::AngleUnit::Radian);
-  assert_expression_has_characteristic_range(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)),Rational::Builder(10))), 40.0f);
-  assert_expression_has_characteristic_range(Addition::Builder(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)),Rational::Builder(10))),Cosine::Builder(Division::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX),Rational::Builder(2)))), 720.0f);
-  assert_expression_has_characteristic_range(Addition::Builder(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)),Rational::Builder(10))),Cosine::Builder(Division::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX),Rational::Builder(2)))), 4.0f*M_PI, Preferences::AngleUnit::Radian);
-  assert_expression_has_characteristic_range(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX), NAN);
+  assert_expression_has_characteristic_range(Cosine::Builder(Symbol::Builder(UCodePointUnknownX)), 360.0f);
+  assert_expression_has_characteristic_range(Cosine::Builder(Opposite::Builder(Symbol::Builder(UCodePointUnknownX))), 360.0f);
+  assert_expression_has_characteristic_range(Cosine::Builder(Symbol::Builder(UCodePointUnknownX)), 2.0f*M_PI, Preferences::AngleUnit::Radian);
+  assert_expression_has_characteristic_range(Cosine::Builder(Opposite::Builder(Symbol::Builder(UCodePointUnknownX))), 2.0f*M_PI, Preferences::AngleUnit::Radian);
+  assert_expression_has_characteristic_range(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(UCodePointUnknownX)),Rational::Builder(10))), 40.0f);
+  assert_expression_has_characteristic_range(Addition::Builder(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(UCodePointUnknownX)),Rational::Builder(10))),Cosine::Builder(Division::Builder(Symbol::Builder(UCodePointUnknownX),Rational::Builder(2)))), 720.0f);
+  assert_expression_has_characteristic_range(Addition::Builder(Sine::Builder(Addition::Builder(Multiplication::Builder(Rational::Builder(9),Symbol::Builder(UCodePointUnknownX)),Rational::Builder(10))),Cosine::Builder(Division::Builder(Symbol::Builder(UCodePointUnknownX),Rational::Builder(2)))), 4.0f*M_PI, Preferences::AngleUnit::Radian);
+  assert_expression_has_characteristic_range(Symbol::Builder(UCodePointUnknownX), NAN);
   assert_expression_has_characteristic_range(Addition::Builder(Cosine::Builder(Rational::Builder(3)),Rational::Builder(2)), 0.0f);
-  assert_expression_has_characteristic_range(CommonLogarithm::Builder(Cosine::Builder(Multiplication::Builder(Rational::Builder(40),Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)))), 9.0f);
-  assert_expression_has_characteristic_range(Cosine::Builder((Expression)Cosine::Builder(Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX))), 360.0f);
+  assert_expression_has_characteristic_range(CommonLogarithm::Builder(Cosine::Builder(Multiplication::Builder(Rational::Builder(40),Symbol::Builder(UCodePointUnknownX)))), 9.0f);
+  assert_expression_has_characteristic_range(Cosine::Builder((Expression)Cosine::Builder(Symbol::Builder(UCodePointUnknownX))), 360.0f);
   assert_simplify("cos(x)→f(x)");
-  assert_expression_has_characteristic_range(Function::Builder("f",1,Symbol::Builder(Poincare::Symbol::SpecialSymbols::UnknownX)), 360.0f);
+  assert_expression_has_characteristic_range(Function::Builder("f",1,Symbol::Builder(UCodePointUnknownX)), 360.0f);
 }
 
 void assert_parsed_expression_has_variables(const char * expression, const char * variables[], int trueNumberOfVariables) {
diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index e946689c0..562aeae43 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -156,10 +156,14 @@ QUIZ_CASE(poincare_user_variable_functions_with_context) {
   // f : x→ x^2
   assert_simplify("x^2→f(x)");
   // Approximate f(?-2) with ? = 5
-  const char x[] = {Symbol::SpecialSymbols::UnknownX, 0};
-  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Rational::Builder(2))), x, 5.0, 9.0);
+  constexpr int bufferSize = 5;
+  char x[bufferSize];
+  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, x, bufferSize);
+  quiz_assert(codePointSize <= bufferSize - 1);
+  x[codePointSize] = 0;
+  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(2))), x, 5.0, 9.0);
   // Approximate f(?-1)+f(?+1) with ? = 3
-  assert_parsed_expression_approximates_with_value_for_symbol(Addition::Builder(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Rational::Builder(1))), Function::Builder("f", 1, Addition::Builder(Symbol::Builder(Symbol::SpecialSymbols::UnknownX), Rational::Builder(1)))), x, 3.0, 20.0);
+  assert_parsed_expression_approximates_with_value_for_symbol(Addition::Builder(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(1))), Function::Builder("f", 1, Addition::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(1)))), x, 3.0, 20.0);
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
@@ -168,9 +172,9 @@ QUIZ_CASE(poincare_user_variable_functions_with_context) {
   assert_simplify("√(-1)×√(-1)→f(x)");
   // Approximate f(?) with ? = 5
   // Cartesian
-  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(Symbol::SpecialSymbols::UnknownX)), x, 1.0, -1.0);
+  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(UCodePointUnknownX)), x, 1.0, -1.0);
   // Real
-  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(Symbol::SpecialSymbols::UnknownX)), x, 1.0, (double)NAN, Real);
+  assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Symbol::Builder(UCodePointUnknownX)), x, 1.0, (double)NAN, Real);
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();

From 1c62550649cedf27ac7cc293a6fb21c5d91db088 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 15:07:45 +0100
Subject: [PATCH 150/295] [apps] Removed unused static inline method

---
 apps/shared/function_list_controller.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/apps/shared/function_list_controller.cpp b/apps/shared/function_list_controller.cpp
index 89f65655c..cc65e5211 100644
--- a/apps/shared/function_list_controller.cpp
+++ b/apps/shared/function_list_controller.cpp
@@ -5,7 +5,6 @@
 namespace Shared {
 
 static inline int maxInt(int x, int y) { return x > y ? x : y; }
-static inline int minInt(int x, int y) { return x < y ? x : y; }
 
 FunctionListController::FunctionListController(Responder * parentResponder, ButtonRowController * header, ButtonRowController * footer, I18n::Message text) :
   ExpressionModelListController(parentResponder, text),

From a88a1bcbef58002e65bd359e7d330e53ea8d31cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 4 Mar 2019 16:54:32 +0100
Subject: [PATCH 151/295] [escher] Increase TextField::maxBufferSize

In order to be able to write a 10*10 adjacency matrix
---
 escher/include/escher/layout_field.h | 2 +-
 escher/include/escher/text_field.h   | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/escher/include/escher/layout_field.h b/escher/include/escher/layout_field.h
index f04ed133b..874719df8 100644
--- a/escher/include/escher/layout_field.h
+++ b/escher/include/escher/layout_field.h
@@ -49,7 +49,7 @@ protected:
   bool privateHandleMoveEvent(Ion::Events::Event event, bool * shouldRecomputeLayout);
 
 private:
-  constexpr static int k_maxNumberOfLayouts = 152;
+  constexpr static int k_maxNumberOfLayouts = 220;
   static_assert(k_maxNumberOfLayouts == TextField::maxBufferSize(), "Maximal number of layouts in a layout field should be equal to max number of char in text field");
   void scrollRightOfLayout(Poincare::Layout layoutR);
   void scrollToBaselinedRect(KDRect rect, KDCoordinate baseline);
diff --git a/escher/include/escher/text_field.h b/escher/include/escher/text_field.h
index 2cc18c2dc..c2725a3df 100644
--- a/escher/include/escher/text_field.h
+++ b/escher/include/escher/text_field.h
@@ -63,8 +63,11 @@ protected:
      * lengths can reach 70 (ie
      * [[1.234567e-123*e^(1.234567e-123*i), 1.234567e-123*e^(1.234567e-123*i)]]).
      * In order to be able to record those output text, k_maxBufferSize must be
-     * over 70. */
-    constexpr static int k_maxBufferSize = 152;
+     * over 70.
+     * Furthermore, we want ot be able to write an adjacency matrix of size 10
+     * so we need at least 2 brackets + 10 * (2 brackets + 10 digits + 9 commas)
+     * = 212 characters. */
+    constexpr static int k_maxBufferSize = 220;
   private:
     void layoutSubviews() override;
     KDRect glyphFrameAtPosition(const char * buffer, const char * position) const override;

From 3ab8a18d7f52980ad28387c76cd7cc7f9d0c96e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 15:30:49 +0100
Subject: [PATCH 152/295] [apps/toolbox] Matrix > Identity command

---
 apps/math_toolbox.cpp      | 1 +
 apps/shared.universal.i18n | 1 +
 apps/toolbox.de.i18n       | 1 +
 apps/toolbox.en.i18n       | 1 +
 apps/toolbox.es.i18n       | 1 +
 apps/toolbox.fr.i18n       | 1 +
 apps/toolbox.pt.i18n       | 1 +
 7 files changed, 7 insertions(+)

diff --git a/apps/math_toolbox.cpp b/apps/math_toolbox.cpp
index 7145a6ea0..7d449d3c2 100644
--- a/apps/math_toolbox.cpp
+++ b/apps/math_toolbox.cpp
@@ -40,6 +40,7 @@ const ToolboxMessageTree arithmeticChildren[] = {
 #if MATRICES_ARE_DEFINED
 const ToolboxMessageTree matricesChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::MatrixCommandWithArg, I18n::Message::NewMatrix, false, I18n::Message::MatrixCommand),
+  ToolboxMessageTree::Leaf(I18n::Message::IndentityCommandWithArg, I18n::Message::Identity),
   ToolboxMessageTree::Leaf(I18n::Message::InverseCommandWithArg, I18n::Message::Inverse),
   ToolboxMessageTree::Leaf(I18n::Message::DeterminantCommandWithArg, I18n::Message::Determinant),
   ToolboxMessageTree::Leaf(I18n::Message::TransposeCommandWithArg, I18n::Message::Transpose),
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index 89203d8b1..907f8f7f2 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -31,6 +31,7 @@ FloorCommandWithArg = "floor(x)"
 FracCommandWithArg = "frac(x)"
 GcdCommandWithArg = "gcd(p,q)"
 ImCommandWithArg = "im(z)"
+IndentityCommandWithArg = "identity(n)"
 IntCommand = "int(\x11,x,\x11,\x11)"
 IntCommandWithArg = "int(f(x),x,a,b)"
 InverseCommandWithArg = "inverse(M)"
diff --git a/apps/toolbox.de.i18n b/apps/toolbox.de.i18n
index 77bdd6ffb..0de46ea75 100644
--- a/apps/toolbox.de.i18n
+++ b/apps/toolbox.de.i18n
@@ -8,6 +8,7 @@ Probability = "Kombinatorik"
 Arithmetic = "Arithmetik"
 Matrices = "Matrizen"
 NewMatrix = "Neue Matrix"
+Identity = "Einheitsmatrix der Größe n"
 Lists = "Listen"
 HyperbolicTrigonometry = "Hyperbelfunktionen"
 Fluctuation = "Konfidenzintervall"
diff --git a/apps/toolbox.en.i18n b/apps/toolbox.en.i18n
index bd4e8208f..c1c01eb01 100644
--- a/apps/toolbox.en.i18n
+++ b/apps/toolbox.en.i18n
@@ -8,6 +8,7 @@ Probability = "Combinatorics"
 Arithmetic = "Arithmetic"
 Matrices = "Matrix"
 NewMatrix = "New matrix"
+Identity = "Identity matrix of size n"
 Lists = "List"
 HyperbolicTrigonometry = "Hyperbolic trigonometry"
 Fluctuation = "Prediction Interval"
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index 0adb2df16..0274787b6 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -8,6 +8,7 @@ Probability = "Combinatoria"
 Arithmetic = "Aritmética"
 Matrices = "Matriz"
 NewMatrix = "Nueva matriz"
+Identity = "Matriz identidad de tamaño n"
 Lists = "Listas"
 HyperbolicTrigonometry = "Trigonometría hiperbólica"
 Fluctuation = "Interval de predicción"
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index bc6440ddd..e167f94b9 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -8,6 +8,7 @@ Probability = "Dénombrement"
 Arithmetic = "Arithmétique"
 Matrices = "Matrices"
 NewMatrix = "Nouvelle matrice"
+Identity = "Matrice identité de taille n"
 Lists = "Listes"
 HyperbolicTrigonometry = "Trigonométrie hyperbolique"
 Fluctuation = "Intervalle fluctuation"
diff --git a/apps/toolbox.pt.i18n b/apps/toolbox.pt.i18n
index d34e5dec9..8c0c72400 100644
--- a/apps/toolbox.pt.i18n
+++ b/apps/toolbox.pt.i18n
@@ -8,6 +8,7 @@ Probability = "Combinatoria"
 Arithmetic = "Aritmetica"
 Matrices = "Matrizes"
 NewMatrix = "Nova matriz"
+Identity = "Matriz identidade de ordem n"
 Lists = "Listas"
 HyperbolicTrigonometry = "Funcoes hiperbolicas"
 Fluctuation = "Intervalo de confianca"

From 5f42c590ca16ef7ebb49c19436ab8e35a4babb99 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 16:02:57 +0100
Subject: [PATCH 153/295] [poincarE] Static method name upper case

---
 poincare/include/poincare/matrix.h         | 2 +-
 poincare/include/poincare/matrix_complex.h | 2 +-
 poincare/src/matrix.cpp                    | 2 +-
 poincare/src/matrix_complex.cpp            | 2 +-
 poincare/src/power.cpp                     | 4 ++--
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/poincare/include/poincare/matrix.h b/poincare/include/poincare/matrix.h
index 96188ed5a..b015b81de 100644
--- a/poincare/include/poincare/matrix.h
+++ b/poincare/include/poincare/matrix.h
@@ -80,7 +80,7 @@ public:
   Expression trace() const;
   Expression determinant() const;
   Matrix transpose() const;
-  static Matrix createIdentity(int dim);
+  static Matrix CreateIdentity(int dim);
   /* createInverse can be called on any matrix reduce or not, approximate or not. */
   Expression inverse(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
 #endif
diff --git a/poincare/include/poincare/matrix_complex.h b/poincare/include/poincare/matrix_complex.h
index 2566b1d44..a18e74f2f 100644
--- a/poincare/include/poincare/matrix_complex.h
+++ b/poincare/include/poincare/matrix_complex.h
@@ -60,7 +60,7 @@ public:
   static MatrixComplex Builder() { return TreeHandle::NAryBuilder<MatrixComplex<T>, MatrixComplexNode<T>>(); }
   static MatrixComplex Builder(std::complex<T> * operands, int numberOfRows, int numberOfColumns);
   static MatrixComplex<T> Undefined();
-  static MatrixComplex<T> createIdentity(int dim);
+  static MatrixComplex<T> CreateIdentity(int dim);
   MatrixComplex<T> inverse() const { return node()->inverse(); }
   MatrixComplex<T> transpose() const { return node()->transpose(); }
   std::complex<T> complexAtIndex(int index) const {
diff --git a/poincare/src/matrix.cpp b/poincare/src/matrix.cpp
index 9ec4b0953..e0a68a7c1 100644
--- a/poincare/src/matrix.cpp
+++ b/poincare/src/matrix.cpp
@@ -292,7 +292,7 @@ Matrix Matrix::transpose() const {
   return matrix;
 }
 
-Matrix Matrix::createIdentity(int dim) {
+Matrix Matrix::CreateIdentity(int dim) {
   Matrix matrix();
   for (int i = 0; i < dim; i++) {
     for (int j = 0; j < dim; j++) {
diff --git a/poincare/src/matrix_complex.cpp b/poincare/src/matrix_complex.cpp
index 76eb28e57..2ec6f47eb 100644
--- a/poincare/src/matrix_complex.cpp
+++ b/poincare/src/matrix_complex.cpp
@@ -137,7 +137,7 @@ MatrixComplex<T> MatrixComplex<T>::Undefined() {
 }
 
 template<typename T>
-MatrixComplex<T> MatrixComplex<T>::createIdentity(int dim) {
+MatrixComplex<T> MatrixComplex<T>::CreateIdentity(int dim) {
   MatrixComplex<T> result = MatrixComplex<T>::Builder();
   for (int i = 0; i < dim; i++) {
     for (int j = 0; j < dim; j++) {
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index d0cf19f11..3472b3246 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -217,7 +217,7 @@ template<typename T> MatrixComplex<T> PowerNode::computeOnMatrixAndComplex(const
     MatrixComplex<T> result = PowerNode::computeOnMatrixAndComplex(inverse, minusC.stdComplex(), complexFormat);
     return result;
   }
-  MatrixComplex<T> result = MatrixComplex<T>::createIdentity(m.numberOfRows());
+  MatrixComplex<T> result = MatrixComplex<T>::CreateIdentity(m.numberOfRows());
   // TODO: implement a quick exponentiation
   for (int k = 0; k < (int)power; k++) {
     if (Expression::ShouldStopProcessing()) {
@@ -311,7 +311,7 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
       return this;
     }
     int exp = exponent.extractedInt(); // Ok, because 0 < exponent < k_maxExactPowerMatrix
-    Matrix * id = Matrix::createIdentity(mat->numberOfRows());
+    Matrix * id = Matrix::CreateIdentity(mat->numberOfRows());
     if (exp == 0) {
       return replaceWith(id, true);
     }

From c726b1f23f3d3d9e51e51d36a9278fc7a3ecfc67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 26 Mar 2019 16:08:32 +0100
Subject: [PATCH 154/295] [poincare] MatrixIdentity

---
 poincare/Makefile                           |  1 +
 poincare/include/poincare/expression.h      |  1 +
 poincare/include/poincare/expression_node.h |  1 +
 poincare/include/poincare/matrix_identity.h | 45 +++++++++++++++++
 poincare/include/poincare_nodes.h           |  1 +
 poincare/src/matrix_identity.cpp            | 56 +++++++++++++++++++++
 poincare/src/parsing/parser.h               |  1 +
 poincare/src/tree_handle.cpp                |  1 +
 8 files changed, 107 insertions(+)
 create mode 100644 poincare/include/poincare/matrix_identity.h
 create mode 100644 poincare/src/matrix_identity.cpp

diff --git a/poincare/Makefile b/poincare/Makefile
index f9c3017bf..7528bb8ce 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -86,6 +86,7 @@ src += $(addprefix poincare/src/,\
   matrix.cpp \
   matrix_complex.cpp \
   matrix_dimension.cpp \
+  matrix_identity.cpp \
   matrix_inverse.cpp \
   matrix_trace.cpp \
   matrix_transpose.cpp \
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index 20299e884..cb0adbba4 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -56,6 +56,7 @@ class Expression : public TreeHandle {
   friend class Logarithm;
   friend class Matrix;
   friend class MatrixDimension;
+  friend class MatrixIdentity;
   friend class MatrixInverse;
   friend class MatrixTrace;
   friend class MatrixTranspose;
diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index fa9a924ad..609337e87 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -93,6 +93,7 @@ public:
     Matrix,
     ConfidenceInterval,
     MatrixDimension,
+    MatrixIdentity,
     MatrixInverse,
     MatrixTranspose,
     PredictionInterval,
diff --git a/poincare/include/poincare/matrix_identity.h b/poincare/include/poincare/matrix_identity.h
new file mode 100644
index 000000000..033f0e37a
--- /dev/null
+++ b/poincare/include/poincare/matrix_identity.h
@@ -0,0 +1,45 @@
+#ifndef POINCARE_MATRIX_IDENTITY_H
+#define POINCARE_MATRIX_IDENTITY_H
+
+#include <poincare/expression.h>
+
+namespace Poincare {
+
+class MatrixIdentityNode final : public ExpressionNode {
+public:
+  // TreeNode
+  size_t size() const override { return sizeof(MatrixIdentityNode); }
+  int numberOfChildren() const override;
+#if POINCARE_TREE_LOG
+  virtual void logNodeName(std::ostream & stream) const override {
+    stream << "MatrixIdentity";
+  }
+#endif
+
+  // Properties
+  Type type() const override { return Type::MatrixIdentity; }
+private:
+  // Layout
+  Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
+  int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
+  // Simplification
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  // Evaluation
+  Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
+  Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
+  template<typename T> Evaluation<T> templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
+};
+
+class MatrixIdentity final : public Expression {
+public:
+  MatrixIdentity(const MatrixIdentityNode * n) : Expression(n) {}
+  static MatrixIdentity Builder(Expression child) { return TreeHandle::FixedArityBuilder<MatrixIdentity, MatrixIdentityNode>(&child, 1); }
+
+  static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("identity", 1, &UntypedBuilderOneChild<MatrixIdentity>);
+
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
+};
+
+}
+
+#endif
diff --git a/poincare/include/poincare_nodes.h b/poincare/include/poincare_nodes.h
index 63d1eea25..cda1f711d 100644
--- a/poincare/include/poincare_nodes.h
+++ b/poincare/include/poincare_nodes.h
@@ -47,6 +47,7 @@
 #include <poincare/matrix.h>
 #include <poincare/matrix_complex.h>
 #include <poincare/matrix_dimension.h>
+#include <poincare/matrix_identity.h>
 #include <poincare/matrix_inverse.h>
 #include <poincare/matrix_trace.h>
 #include <poincare/matrix_transpose.h>
diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
new file mode 100644
index 000000000..4724ece55
--- /dev/null
+++ b/poincare/src/matrix_identity.cpp
@@ -0,0 +1,56 @@
+#include <poincare/matrix_identity.h>
+#include <poincare/matrix_complex.h>
+#include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
+#include <poincare/undefined.h>
+#include <cmath>
+
+namespace Poincare {
+
+constexpr Expression::FunctionHelper MatrixIdentity::s_functionHelper;
+
+int MatrixIdentityNode::numberOfChildren() const { return MatrixIdentity::s_functionHelper.numberOfChildren(); }
+
+Expression MatrixIdentityNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+  return MatrixIdentity(this).shallowReduce(context, complexFormat, angleUnit, target);
+}
+
+Layout MatrixIdentityNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
+  return LayoutHelper::Prefix(MatrixIdentity(this), floatDisplayMode, numberOfSignificantDigits, MatrixIdentity::s_functionHelper.name());
+}
+
+int MatrixIdentityNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
+  return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, MatrixIdentity::s_functionHelper.name());
+}
+
+template<typename T>
+Evaluation<T> MatrixIdentityNode::templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const {
+  Evaluation<T> input = childAtIndex(0)->approximate(T(), context, complexFormat, angleUnit);
+  // Check if the child is an integer
+  if (input.type() == EvaluationNode<T>::Type::Complex) {
+    // The child is a complex
+    std::complex<T> c = static_cast<Complex<T>&>(input).stdComplex();
+    T im = c.imag();
+    T re = c.real();
+    if ((im == 0.0 || std::isnan(im)) // The child is a real
+        && (!std::isnan(re) && re > 0) // The child is positive
+        && (std::ceil(re) ==  std::floor(re))) // The child is an integer
+    {
+      return MatrixComplex<T>::CreateIdentity((int)re);
+    }
+  }
+  return Complex<T>::Undefined();
+}
+
+
+Expression MatrixIdentity::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+  {
+    Expression e = Expression::defaultShallowReduce();
+    if (e.isUndefined()) {
+      return e;
+    }
+    return *this;
+  }
+}
+
+}
diff --git a/poincare/src/parsing/parser.h b/poincare/src/parsing/parser.h
index bd591b4dc..fac7bf1c1 100644
--- a/poincare/src/parsing/parser.h
+++ b/poincare/src/parsing/parser.h
@@ -109,6 +109,7 @@ private:
     &Floor::s_functionHelper,
     &FracPart::s_functionHelper,
     &GreatCommonDivisor::s_functionHelper,
+    &MatrixIdentity::s_functionHelper,
     &ImaginaryPart::s_functionHelper,
     &Integral::s_functionHelper,
     &MatrixInverse::s_functionHelper,
diff --git a/poincare/src/tree_handle.cpp b/poincare/src/tree_handle.cpp
index 25b2aef27..672846063 100644
--- a/poincare/src/tree_handle.cpp
+++ b/poincare/src/tree_handle.cpp
@@ -310,6 +310,7 @@ template Matrix TreeHandle::NAryBuilder<Matrix, MatrixNode>(TreeHandle*, size_t)
 template MatrixComplex<double> TreeHandle::NAryBuilder<MatrixComplex<double>, MatrixComplexNode<double> >(TreeHandle*, size_t);
 template MatrixComplex<float> TreeHandle::NAryBuilder<MatrixComplex<float>, MatrixComplexNode<float> >(TreeHandle*, size_t);
 template MatrixDimension TreeHandle::FixedArityBuilder<MatrixDimension, MatrixDimensionNode>(TreeHandle*, size_t);
+template MatrixIdentity TreeHandle::FixedArityBuilder<MatrixIdentity, MatrixIdentityNode>(TreeHandle*, size_t);
 template MatrixInverse TreeHandle::FixedArityBuilder<MatrixInverse, MatrixInverseNode>(TreeHandle*, size_t);
 template MatrixTrace TreeHandle::FixedArityBuilder<MatrixTrace, MatrixTraceNode>(TreeHandle*, size_t);
 template MatrixTranspose TreeHandle::FixedArityBuilder<MatrixTranspose, MatrixTransposeNode>(TreeHandle*, size_t);

From a337bd260d6b8e605ec3f9e24c968247485c1c47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 27 Mar 2019 10:32:57 +0100
Subject: [PATCH 155/295] [unicode] Use
 Poincare::SerializationHelper::CodePoint

---
 apps/sequence/sequence.cpp         |  9 +++++----
 apps/shared/cartesian_function.cpp | 21 +++++++++------------
 poincare/src/symbol.cpp            |  2 +-
 poincare/src/trigonometry.cpp      | 11 ++++++-----
 poincare/test/user_variable.cpp    |  9 +++++----
 5 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 02701e9fd..0f2a359d7 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -2,6 +2,7 @@
 #include "cache_context.h"
 #include "sequence_store.h"
 #include <poincare/layout_helper.h>
+#include <poincare/serialization_helper.h>
 #include <poincare/code_point_layout.h>
 #include <poincare/vertical_offset_layout.h>
 #include <poincare/integer.h>
@@ -122,11 +123,11 @@ T Sequence::approximateToNextRank(int n, SequenceContext * sqctx) const {
   if (n < initialRank() || n < 0) {
     return NAN;
   }
-  constexpr int bufferSize = 5;
+
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownN[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownN, unknownN, bufferSize);
-  assert(codePointSize <= bufferSize - 1);
-  unknownN[codePointSize] = 0;
+  Poincare::SerializationHelper::CodePoint(unknownN, bufferSize, UCodePointUnknownN);
+
   CacheContext<T> ctx = CacheContext<T>(sqctx);
   T un = sqctx->valueOfSequenceAtPreviousRank<T>(0, 0);
   T unm1 = sqctx->valueOfSequenceAtPreviousRank<T>(0, 1);
diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index 7faa5492e..b6d304e61 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -3,6 +3,7 @@
 #include "poincare_helpers.h"
 #include <poincare/derivative.h>
 #include <poincare/integral.h>
+#include <poincare/serialization_helper.h>
 #include <escher/palette.h>
 #include <ion/unicode/utf8_decoder.h>
 #include <float.h>
@@ -104,34 +105,30 @@ double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::C
 }
 
 Expression::Coordinate2D CartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
-  constexpr int bufferSize = 3;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownX[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
-  assert(codePointSize <= bufferSize);
+  SerializationHelper::CodePoint(unknownX, bufferSize, UCodePointUnknownX);
   return PoincareHelpers::NextMinimum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 Expression::Coordinate2D CartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
-  constexpr int bufferSize = 3;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownX[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
-  assert(codePointSize <= bufferSize);
+  SerializationHelper::CodePoint(unknownX, bufferSize, UCodePointUnknownX);
   return PoincareHelpers::NextMaximum(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 double CartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
-  constexpr int bufferSize = 3;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownX[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
-  assert(codePointSize <= bufferSize);
+  SerializationHelper::CodePoint(unknownX, bufferSize, UCodePointUnknownX);
   return PoincareHelpers::NextRoot(expressionReduced(context), unknownX, start, step, max, *context);
 }
 
 Expression::Coordinate2D CartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, Expression e) const {
-  constexpr int bufferSize = 3;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char unknownX[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, unknownX, bufferSize);
-  assert(codePointSize <= bufferSize);
+  SerializationHelper::CodePoint(unknownX, bufferSize, UCodePointUnknownX);
   return PoincareHelpers::NextIntersection(expressionReduced(context), unknownX, start, step, max, *context, e);
 }
 
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index a0711dc46..1bb2f97d9 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -157,7 +157,7 @@ bool SymbolNode::isUnknown(CodePoint unknownSymbol) const {
 }
 
 Symbol Symbol::Builder(CodePoint name) {
-  constexpr int bufferSize = 5;
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char buffer[bufferSize];
   int codePointSize = UTF8Decoder::CodePointToChars(name, buffer, bufferSize);
   assert(codePointSize <= bufferSize);
diff --git a/poincare/src/trigonometry.cpp b/poincare/src/trigonometry.cpp
index 2c7403a5a..84b694c5c 100644
--- a/poincare/src/trigonometry.cpp
+++ b/poincare/src/trigonometry.cpp
@@ -8,6 +8,7 @@
 #include <poincare/power.h>
 #include <poincare/preferences.h>
 #include <poincare/rational.h>
+#include <poincare/serialization_helper.h>
 #include <poincare/sign_function.h>
 #include <poincare/subtraction.h>
 #include <poincare/symbol.h>
@@ -22,11 +23,11 @@ namespace Poincare {
 
 float Trigonometry::characteristicXRange(const Expression & e, Context & context, Preferences::AngleUnit angleUnit) {
   assert(e.numberOfChildren() == 1);
-  constexpr int size = 5;
-  char x[size];
-  int zeroIndex = UTF8Decoder::CodePointToChars(UCodePointUnknownX, x, size);
-  assert(zeroIndex <= size - 1);
-  x[zeroIndex] = 0;
+
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
+  char x[bufferSize];
+  SerializationHelper::CodePoint(x, bufferSize, UCodePointUnknownX);
+
   int d = e.childAtIndex(0).polynomialDegree(context, x);
   if (d < 0 || d > 1) {
     // child(0) is not linear so we cannot easily find an interesting range
diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index 562aeae43..f22fdd477 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -2,6 +2,7 @@
 #include <ion.h>
 #include <assert.h>
 #include <apps/shared/global_context.h>
+#include <poincare/serialization_helper.h>
 #include "helper.h"
 
 using namespace Poincare;
@@ -156,11 +157,11 @@ QUIZ_CASE(poincare_user_variable_functions_with_context) {
   // f : x→ x^2
   assert_simplify("x^2→f(x)");
   // Approximate f(?-2) with ? = 5
-  constexpr int bufferSize = 5;
+
+  constexpr int bufferSize = CodePoint::MaxCodePointCharLength + 1;
   char x[bufferSize];
-  int codePointSize = UTF8Decoder::CodePointToChars(UCodePointUnknownX, x, bufferSize);
-  quiz_assert(codePointSize <= bufferSize - 1);
-  x[codePointSize] = 0;
+  Poincare::SerializationHelper::CodePoint(x, bufferSize, UCodePointUnknownX);
+
   assert_parsed_expression_approximates_with_value_for_symbol(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(2))), x, 5.0, 9.0);
   // Approximate f(?-1)+f(?+1) with ? = 3
   assert_parsed_expression_approximates_with_value_for_symbol(Addition::Builder(Function::Builder("f", 1, Subtraction::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(1))), Function::Builder("f", 1, Addition::Builder(Symbol::Builder(UCodePointUnknownX), Rational::Builder(1)))), x, 3.0, 20.0);

From b7b17105661dab283dde35ff99d42bc0990c9d9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 27 Mar 2019 10:46:52 +0100
Subject: [PATCH 156/295] [apps] Clean apps/shared/expression_model_handle.cpp

---
 apps/shared/expression_model_handle.cpp | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/apps/shared/expression_model_handle.cpp b/apps/shared/expression_model_handle.cpp
index c167a2e6a..b51212a8f 100644
--- a/apps/shared/expression_model_handle.cpp
+++ b/apps/shared/expression_model_handle.cpp
@@ -1,18 +1,9 @@
 #include "expression_model_handle.h"
-#include "global_context.h"
-#include "poincare_helpers.h"
-#include <poincare/horizontal_layout.h>
-#include <string.h>
-#include <cmath>
-#include <assert.h>
-
-using namespace Ion;
-using namespace Poincare;
 
 namespace Shared {
 
-ExpressionModelHandle::ExpressionModelHandle(Storage::Record record) :
-  Storage::Record(record)
+ExpressionModelHandle::ExpressionModelHandle(Ion::Storage::Record record) :
+  Ion::Storage::Record(record)
 {
 }
 

From 267d27f1145922b61b6171e14284534fa2256f0c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 27 Mar 2019 14:50:32 +0100
Subject: [PATCH 157/295] [poincare] Remove symbolic computation

---
 apps/calculation/calculation.cpp              |   4 +-
 apps/shared/poincare_helpers.h                |  16 +--
 poincare/include/poincare/absolute_value.h    |   2 +-
 poincare/include/poincare/addition.h          |   2 +-
 poincare/include/poincare/arc_cosine.h        |   2 +-
 poincare/include/poincare/arc_sine.h          |   2 +-
 poincare/include/poincare/arc_tangent.h       |   2 +-
 .../include/poincare/binomial_coefficient.h   |   2 +-
 poincare/include/poincare/ceiling.h           |   2 +-
 poincare/include/poincare/complex_argument.h  |   2 +-
 poincare/include/poincare/complex_cartesian.h |   2 +-
 .../include/poincare/confidence_interval.h    |   2 +-
 poincare/include/poincare/conjugate.h         |   2 +-
 poincare/include/poincare/constant.h          |   2 +-
 poincare/include/poincare/cosine.h            |   2 +-
 poincare/include/poincare/decimal.h           |   2 +-
 poincare/include/poincare/derivative.h        |   2 +-
 poincare/include/poincare/determinant.h       |   2 +-
 poincare/include/poincare/division.h          |   2 +-
 poincare/include/poincare/division_quotient.h |   2 +-
 .../include/poincare/division_remainder.h     |   2 +-
 poincare/include/poincare/equal.h             |   2 +-
 poincare/include/poincare/expression.h        |  20 +--
 poincare/include/poincare/expression_node.h   |   4 +-
 poincare/include/poincare/factorial.h         |   2 +-
 poincare/include/poincare/floor.h             |   2 +-
 poincare/include/poincare/frac_part.h         |   2 +-
 poincare/include/poincare/function.h          |   4 +-
 .../include/poincare/great_common_divisor.h   |   2 +-
 .../hyperbolic_trigonometric_function.h       |   2 +-
 poincare/include/poincare/imaginary_part.h    |   2 +-
 poincare/include/poincare/integral.h          |   2 +-
 .../include/poincare/least_common_multiple.h  |   2 +-
 poincare/include/poincare/logarithm.h         |   2 +-
 poincare/include/poincare/matrix_dimension.h  |   2 +-
 poincare/include/poincare/matrix_identity.h   |   2 +-
 poincare/include/poincare/matrix_inverse.h    |   2 +-
 poincare/include/poincare/matrix_trace.h      |   2 +-
 poincare/include/poincare/matrix_transpose.h  |   2 +-
 poincare/include/poincare/multiplication.h    |   2 +-
 .../include/poincare/naperian_logarithm.h     |   2 +-
 poincare/include/poincare/nth_root.h          |   2 +-
 poincare/include/poincare/opposite.h          |   2 +-
 poincare/include/poincare/parenthesis.h       |   2 +-
 .../include/poincare/permute_coefficient.h    |   2 +-
 poincare/include/poincare/power.h             |   2 +-
 .../include/poincare/prediction_interval.h    |   2 +-
 poincare/include/poincare/rational.h          |   2 +-
 poincare/include/poincare/real_part.h         |   2 +-
 poincare/include/poincare/round.h             |   2 +-
 poincare/include/poincare/sign_function.h     |   2 +-
 poincare/include/poincare/sine.h              |   2 +-
 poincare/include/poincare/square_root.h       |   2 +-
 poincare/include/poincare/store.h             |   6 +-
 poincare/include/poincare/subtraction.h       |   2 +-
 poincare/include/poincare/symbol.h            |   4 +-
 poincare/include/poincare/tangent.h           |   2 +-
 poincare/src/absolute_value.cpp               |   3 +-
 poincare/src/addition.cpp                     |   2 +-
 poincare/src/arc_cosine.cpp                   |   2 +-
 poincare/src/arc_sine.cpp                     |   2 +-
 poincare/src/arc_tangent.cpp                  |   2 +-
 poincare/src/binomial_coefficient.cpp         |   2 +-
 poincare/src/ceiling.cpp                      |   2 +-
 poincare/src/complex_argument.cpp             |   2 +-
 poincare/src/complex_cartesian.cpp            |   2 +-
 poincare/src/confidence_interval.cpp          |   2 +-
 poincare/src/conjugate.cpp                    |   2 +-
 poincare/src/constant.cpp                     |   2 +-
 poincare/src/cosine.cpp                       |   2 +-
 poincare/src/decimal.cpp                      |   2 +-
 poincare/src/derivative.cpp                   |   2 +-
 poincare/src/determinant.cpp                  |   2 +-
 poincare/src/division.cpp                     |   2 +-
 poincare/src/division_quotient.cpp            |   2 +-
 poincare/src/division_remainder.cpp           |   2 +-
 poincare/src/equal.cpp                        |   2 +-
 poincare/src/expression.cpp                   | 119 +++++++++---------
 poincare/src/expression_node.cpp              |   6 +-
 poincare/src/factorial.cpp                    |   2 +-
 poincare/src/floor.cpp                        |   2 +-
 poincare/src/frac_part.cpp                    |   2 +-
 poincare/src/function.cpp                     |  14 ++-
 poincare/src/great_common_divisor.cpp         |   2 +-
 .../src/hyperbolic_trigonometric_function.cpp |   2 +-
 poincare/src/imaginary_part.cpp               |   3 +-
 poincare/src/integral.cpp                     |   2 +-
 poincare/src/least_common_multiple.cpp        |   2 +-
 poincare/src/logarithm.cpp                    |   4 +-
 poincare/src/matrix_dimension.cpp             |   2 +-
 poincare/src/matrix_identity.cpp              |   2 +-
 poincare/src/matrix_inverse.cpp               |   2 +-
 poincare/src/matrix_trace.cpp                 |   2 +-
 poincare/src/matrix_transpose.cpp             |   2 +-
 poincare/src/multiplication.cpp               |   2 +-
 poincare/src/naperian_logarithm.cpp           |   2 +-
 poincare/src/nth_root.cpp                     |   2 +-
 poincare/src/opposite.cpp                     |   2 +-
 poincare/src/parenthesis.cpp                  |   2 +-
 poincare/src/permute_coefficient.cpp          |   2 +-
 poincare/src/power.cpp                        |   2 +-
 poincare/src/prediction_interval.cpp          |   2 +-
 poincare/src/rational.cpp                     |   2 +-
 poincare/src/real_part.cpp                    |   2 +-
 poincare/src/round.cpp                        |   2 +-
 poincare/src/sign_function.cpp                |   2 +-
 poincare/src/sine.cpp                         |   2 +-
 poincare/src/square_root.cpp                  |   2 +-
 poincare/src/store.cpp                        |  34 ++---
 poincare/src/subtraction.cpp                  |   2 +-
 poincare/src/symbol.cpp                       |  13 +-
 poincare/src/tangent.cpp                      |   2 +-
 112 files changed, 231 insertions(+), 217 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 96bac7607..b263be966 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -53,7 +53,7 @@ void Calculation::setContent(const char * c, Context * context, Expression ansEx
   }
   Expression exactOutput;
   Expression approximateOutput;
-  PoincareHelpers::ParseAndSimplifyAndApproximate(m_inputText, &exactOutput, &approximateOutput, *context);
+  PoincareHelpers::ParseAndSimplifyAndApproximate(m_inputText, &exactOutput, &approximateOutput, *context, false);
   PoincareHelpers::Serialize(exactOutput, m_exactOutputText, sizeof(m_exactOutputText));
   PoincareHelpers::Serialize(approximateOutput, m_approximateOutputText, sizeof(m_approximateOutputText));
 }
@@ -183,7 +183,7 @@ Calculation::EqualSign Calculation::exactAndApproximateDisplayedOutputsAreEqual(
   constexpr int bufferSize = Constant::MaxSerializedExpressionSize;
   char buffer[bufferSize];
   Preferences * preferences = Preferences::sharedPreferences();
-  Expression exactOutputExpression = PoincareHelpers::ParseAndSimplify(m_exactOutputText, *context);
+  Expression exactOutputExpression = PoincareHelpers::ParseAndSimplify(m_exactOutputText, *context, false);
   if (exactOutputExpression.isUninitialized()) {
     exactOutputExpression = Undefined::Builder();
   }
diff --git a/apps/shared/poincare_helpers.h b/apps/shared/poincare_helpers.h
index e401f58f5..24f3c317c 100644
--- a/apps/shared/poincare_helpers.h
+++ b/apps/shared/poincare_helpers.h
@@ -45,28 +45,28 @@ inline T ApproximateWithValueForSymbol(const Poincare::Expression e, const char
 }
 
 template <class T>
-inline T ApproximateToScalar(const char * text, Poincare::Context & context) {
+inline T ApproximateToScalar(const char * text, Poincare::Context & context, bool symbolicComputation = true) {
   Poincare::Preferences * preferences = Poincare::Preferences::sharedPreferences();
   Poincare::Preferences::ComplexFormat complexFormat = Poincare::Expression::UpdatedComplexFormatWithTextInput(preferences->complexFormat(), text);
-  return Poincare::Expression::ApproximateToScalar<T>(text, context, complexFormat, preferences->angleUnit());
+  return Poincare::Expression::ApproximateToScalar<T>(text, context, complexFormat, preferences->angleUnit(), symbolicComputation);
 }
 
-inline Poincare::Expression ParseAndSimplify(const char * text, Poincare::Context & context) {
+inline Poincare::Expression ParseAndSimplify(const char * text, Poincare::Context & context, bool symbolicComputation = true) {
   Poincare::Preferences * preferences = Poincare::Preferences::sharedPreferences();
   Poincare::Preferences::ComplexFormat complexFormat = Poincare::Expression::UpdatedComplexFormatWithTextInput(preferences->complexFormat(), text);
-  return Poincare::Expression::ParseAndSimplify(text, context, complexFormat, preferences->angleUnit());
+  return Poincare::Expression::ParseAndSimplify(text, context, complexFormat, preferences->angleUnit(), symbolicComputation);
 }
 
-inline void Simplify(Poincare::Expression * e, Poincare::Context & context) {
+inline void Simplify(Poincare::Expression * e, Poincare::Context & context, bool symbolicComputation = true) {
   Poincare::Preferences * preferences = Poincare::Preferences::sharedPreferences();
   Poincare::Preferences::ComplexFormat complexFormat = Poincare::Expression::UpdatedComplexFormatWithExpressionInput(preferences->complexFormat(), *e, context);
-  *e = e->simplify(context, complexFormat, preferences->angleUnit());
+  *e = e->simplify(context, complexFormat, preferences->angleUnit(), symbolicComputation);
 }
 
-inline void ParseAndSimplifyAndApproximate(const char * text, Poincare::Expression * simplifiedExpression, Poincare::Expression * approximateExpression, Poincare::Context & context) {
+inline void ParseAndSimplifyAndApproximate(const char * text, Poincare::Expression * simplifiedExpression, Poincare::Expression * approximateExpression, Poincare::Context & context, bool symbolicComputation = true) {
   Poincare::Preferences * preferences = Poincare::Preferences::sharedPreferences();
   Poincare::Preferences::ComplexFormat complexFormat = Poincare::Expression::UpdatedComplexFormatWithTextInput(preferences->complexFormat(), text);
-  Poincare::Expression::ParseAndSimplifyAndApproximate(text, simplifiedExpression, approximateExpression, context, complexFormat, preferences->angleUnit());
+  Poincare::Expression::ParseAndSimplifyAndApproximate(text, simplifiedExpression, approximateExpression, context, complexFormat, preferences->angleUnit(), symbolicComputation);
 }
 
 inline typename Poincare::Expression::Coordinate2D NextMinimum(const Poincare::Expression e, const char * symbol, double start, double step, double max, Poincare::Context & context) {
diff --git a/poincare/include/poincare/absolute_value.h b/poincare/include/poincare/absolute_value.h
index 07c5f1bbf..1180898c6 100644
--- a/poincare/include/poincare/absolute_value.h
+++ b/poincare/include/poincare/absolute_value.h
@@ -42,7 +42,7 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 };
 
 class AbsoluteValue final : public Expression {
diff --git a/poincare/include/poincare/addition.h b/poincare/include/poincare/addition.h
index 6f8d50988..8a8d130ca 100644
--- a/poincare/include/poincare/addition.h
+++ b/poincare/include/poincare/addition.h
@@ -42,7 +42,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
 
   /* Evaluation */
diff --git a/poincare/include/poincare/arc_cosine.h b/poincare/include/poincare/arc_cosine.h
index 89a976098..337ddd276 100644
--- a/poincare/include/poincare/arc_cosine.h
+++ b/poincare/include/poincare/arc_cosine.h
@@ -27,7 +27,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   //Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/arc_sine.h b/poincare/include/poincare/arc_sine.h
index 2cdf8626f..459595615 100644
--- a/poincare/include/poincare/arc_sine.h
+++ b/poincare/include/poincare/arc_sine.h
@@ -26,7 +26,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   //Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/arc_tangent.h b/poincare/include/poincare/arc_tangent.h
index b61438e64..39657231c 100644
--- a/poincare/include/poincare/arc_tangent.h
+++ b/poincare/include/poincare/arc_tangent.h
@@ -30,7 +30,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   //Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/binomial_coefficient.h b/poincare/include/poincare/binomial_coefficient.h
index 6eeb90dd4..5f7094346 100644
--- a/poincare/include/poincare/binomial_coefficient.h
+++ b/poincare/include/poincare/binomial_coefficient.h
@@ -29,7 +29,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/ceiling.h b/poincare/include/poincare/ceiling.h
index a0f9cb615..707a1c9ea 100644
--- a/poincare/include/poincare/ceiling.h
+++ b/poincare/include/poincare/ceiling.h
@@ -28,7 +28,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/complex_argument.h b/poincare/include/poincare/complex_argument.h
index b6a9b9fad..c5e9f1594 100644
--- a/poincare/include/poincare/complex_argument.h
+++ b/poincare/include/poincare/complex_argument.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/complex_cartesian.h b/poincare/include/poincare/complex_cartesian.h
index 2ac6e865f..951373e2b 100644
--- a/poincare/include/poincare/complex_cartesian.h
+++ b/poincare/include/poincare/complex_cartesian.h
@@ -27,7 +27,7 @@ private:
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
 
 private:
diff --git a/poincare/include/poincare/confidence_interval.h b/poincare/include/poincare/confidence_interval.h
index 8f9652b89..6a42f4ea7 100644
--- a/poincare/include/poincare/confidence_interval.h
+++ b/poincare/include/poincare/confidence_interval.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/conjugate.h b/poincare/include/poincare/conjugate.h
index f2324c1f4..7983a5d44 100644
--- a/poincare/include/poincare/conjugate.h
+++ b/poincare/include/poincare/conjugate.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/constant.h b/poincare/include/poincare/constant.h
index d80818087..7b8277e84 100644
--- a/poincare/include/poincare/constant.h
+++ b/poincare/include/poincare/constant.h
@@ -47,7 +47,7 @@ public:
   int simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 private:
   char m_name[0]; // MUST be the last member variable
 
diff --git a/poincare/include/poincare/cosine.h b/poincare/include/poincare/cosine.h
index 8617103ee..7fe3ecc1d 100644
--- a/poincare/include/poincare/cosine.h
+++ b/poincare/include/poincare/cosine.h
@@ -33,7 +33,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplication
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
     return ApproximationHelper::Map<float>(this, context, complexFormat, angleUnit,computeOnComplex<float>);
diff --git a/poincare/include/poincare/decimal.h b/poincare/include/poincare/decimal.h
index e55904fc7..f728bca31 100644
--- a/poincare/include/poincare/decimal.h
+++ b/poincare/include/poincare/decimal.h
@@ -56,7 +56,7 @@ public:
   int simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
 
   // Serialization
diff --git a/poincare/include/poincare/derivative.h b/poincare/include/poincare/derivative.h
index 9cf6ee44f..339a5c41e 100644
--- a/poincare/include/poincare/derivative.h
+++ b/poincare/include/poincare/derivative.h
@@ -33,7 +33,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/determinant.h b/poincare/include/poincare/determinant.h
index e80c2ceb3..a05d361bd 100644
--- a/poincare/include/poincare/determinant.h
+++ b/poincare/include/poincare/determinant.h
@@ -24,7 +24,7 @@ private:
   /* Serialization */
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   /* Simplification */
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   /* Approximation */
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/division.h b/poincare/include/poincare/division.h
index e73617d7c..95593c3f0 100644
--- a/poincare/include/poincare/division.h
+++ b/poincare/include/poincare/division.h
@@ -46,7 +46,7 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
 private:
   // Approximation
diff --git a/poincare/include/poincare/division_quotient.h b/poincare/include/poincare/division_quotient.h
index f68c03b81..300854396 100644
--- a/poincare/include/poincare/division_quotient.h
+++ b/poincare/include/poincare/division_quotient.h
@@ -28,7 +28,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/division_remainder.h b/poincare/include/poincare/division_remainder.h
index 9089fa60a..6069d92d9 100644
--- a/poincare/include/poincare/division_remainder.h
+++ b/poincare/include/poincare/division_remainder.h
@@ -29,7 +29,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/equal.h b/poincare/include/poincare/equal.h
index 7a7b87303..0df94cf24 100644
--- a/poincare/include/poincare/equal.h
+++ b/poincare/include/poincare/equal.h
@@ -22,7 +22,7 @@ public:
   int polynomialDegree(Context & context, const char * symbolName) const override { return -1; }
 private:
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Layout
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index cb0adbba4..de6eff556 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -201,11 +201,11 @@ public:
    *   account the complex format required in the expression they return.
    *   (For instance, in Polar mode, they return an expression of the form
    *   r*e^(i*th) reduced and approximated.) */
-  static Expression ParseAndSimplify(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
-  Expression simplify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
+  static Expression ParseAndSimplify(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation = true);
+  Expression simplify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation = true);
 
-  static void ParseAndSimplifyAndApproximate(const char * text, Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
-  void simplifyAndApproximate(Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
+  static void ParseAndSimplifyAndApproximate(const char * text, Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation = true);
+  void simplifyAndApproximate(Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation = true);
   Expression reduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
 
   static Expression ExpressionWithoutSymbols(Expression expressionWithSymbols, Context & context);
@@ -217,7 +217,7 @@ public:
   template<typename U> static U Epsilon();
   template<typename U> Expression approximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
   template<typename U> U approximateToScalar(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
-  template<typename U> static U ApproximateToScalar(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
+  template<typename U> static U ApproximateToScalar(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation = true);
   template<typename U> U approximateWithValueForSymbol(const char * symbol, U x, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
   /* Expression roots/extrema solver */
   struct Coordinate2D {
@@ -313,7 +313,7 @@ protected:
    */
   Expression makePositiveAnyNegativeNumeralFactor(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
   Expression denominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const { return node()->denominator(context, complexFormat, angleUnit); }
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) { return node()->shallowReduce(context, complexFormat, angleUnit, target); }
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation = true) { return node()->shallowReduce(context, complexFormat, angleUnit, target, symbolicComputation); }
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) { return node()->shallowBeautify(context, complexFormat, angleUnit, target); }
   Expression deepBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
   Expression setSign(ExpressionNode::Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
@@ -322,11 +322,11 @@ private:
   static constexpr int k_maxSymbolReplacementsCount = 10;
   static bool sSymbolReplacementsCountLock;
   /* Simplification */
-  Expression deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
-  void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
-    return node()->deepReduceChildren(context, complexFormat, angleUnit, target);
+  Expression deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation = true);
+  void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation = true) {
+    return node()->deepReduceChildren(context, complexFormat, angleUnit, target, symbolicComputation);
   }
-  void defaultDeepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
+  void defaultDeepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation = true);
   Expression defaultShallowReduce();
   Expression defaultShallowBeautify() { return *this; }
 
diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index 609337e87..9087f8a81 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -162,8 +162,8 @@ public:
   virtual Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const = 0;
 
   /* Simplification */
-  /*!*/ virtual void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
-  /*!*/ virtual Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
+  /*!*/ virtual void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation);
+  /*!*/ virtual Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation);
   /*!*/ virtual Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
   /* Return a clone of the denominator part of the expression */
   /*!*/ virtual Expression denominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
diff --git a/poincare/include/poincare/factorial.h b/poincare/include/poincare/factorial.h
index 2ea2ddb59..b00826768 100644
--- a/poincare/include/poincare/factorial.h
+++ b/poincare/include/poincare/factorial.h
@@ -32,7 +32,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplication
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
diff --git a/poincare/include/poincare/floor.h b/poincare/include/poincare/floor.h
index a7a06be5a..e1d4e3ace 100644
--- a/poincare/include/poincare/floor.h
+++ b/poincare/include/poincare/floor.h
@@ -30,7 +30,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/frac_part.h b/poincare/include/poincare/frac_part.h
index d4ea74b51..09d5637c8 100644
--- a/poincare/include/poincare/frac_part.h
+++ b/poincare/include/poincare/frac_part.h
@@ -30,7 +30,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/function.h b/poincare/include/poincare/function.h
index c1109f0bd..94422cb2a 100644
--- a/poincare/include/poincare/function.h
+++ b/poincare/include/poincare/function.h
@@ -40,7 +40,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowReplaceReplaceableSymbols(Context & context) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override;
@@ -57,7 +57,7 @@ public:
 
   // Simplification
   Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation);
   Expression shallowReplaceReplaceableSymbols(Context & context);
 private:
   //VariableContext unknownXContext(Context & parentContext) const;
diff --git a/poincare/include/poincare/great_common_divisor.h b/poincare/include/poincare/great_common_divisor.h
index 89ffdb891..07bb195e7 100644
--- a/poincare/include/poincare/great_common_divisor.h
+++ b/poincare/include/poincare/great_common_divisor.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/hyperbolic_trigonometric_function.h b/poincare/include/poincare/hyperbolic_trigonometric_function.h
index 98b4a8d7a..58854c30a 100644
--- a/poincare/include/poincare/hyperbolic_trigonometric_function.h
+++ b/poincare/include/poincare/hyperbolic_trigonometric_function.h
@@ -12,7 +12,7 @@ public:
   int numberOfChildren() const override { return 1; }
 private:
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 };
 
 class HyperbolicTrigonometricFunction : public Expression {
diff --git a/poincare/include/poincare/imaginary_part.h b/poincare/include/poincare/imaginary_part.h
index c26367424..e76c55bb4 100644
--- a/poincare/include/poincare/imaginary_part.h
+++ b/poincare/include/poincare/imaginary_part.h
@@ -29,7 +29,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
     return Complex<T>::Builder(std::imag(c));
diff --git a/poincare/include/poincare/integral.h b/poincare/include/poincare/integral.h
index 196ee6359..c30bf4acb 100644
--- a/poincare/include/poincare/integral.h
+++ b/poincare/include/poincare/integral.h
@@ -31,7 +31,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/least_common_multiple.h b/poincare/include/poincare/least_common_multiple.h
index 1fc06b42a..07c36a413 100644
--- a/poincare/include/poincare/least_common_multiple.h
+++ b/poincare/include/poincare/least_common_multiple.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   /* Simplification */
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   /* Evaluation */
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/logarithm.h b/poincare/include/poincare/logarithm.h
index 0826fe76e..b08ddaeaf 100644
--- a/poincare/include/poincare/logarithm.h
+++ b/poincare/include/poincare/logarithm.h
@@ -27,7 +27,7 @@ public:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   // Evaluation
   template<typename U> static Complex<U> computeOnComplex(const std::complex<U> c, Preferences::ComplexFormat, Preferences::AngleUnit angleUnit) {
diff --git a/poincare/include/poincare/matrix_dimension.h b/poincare/include/poincare/matrix_dimension.h
index ec1aa0663..e72a4c946 100644
--- a/poincare/include/poincare/matrix_dimension.h
+++ b/poincare/include/poincare/matrix_dimension.h
@@ -25,7 +25,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/matrix_identity.h b/poincare/include/poincare/matrix_identity.h
index 033f0e37a..b12b29631 100644
--- a/poincare/include/poincare/matrix_identity.h
+++ b/poincare/include/poincare/matrix_identity.h
@@ -23,7 +23,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/matrix_inverse.h b/poincare/include/poincare/matrix_inverse.h
index cd551cf21..84c843bf6 100644
--- a/poincare/include/poincare/matrix_inverse.h
+++ b/poincare/include/poincare/matrix_inverse.h
@@ -24,7 +24,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/matrix_trace.h b/poincare/include/poincare/matrix_trace.h
index 2192d36c9..3f7ce6de5 100644
--- a/poincare/include/poincare/matrix_trace.h
+++ b/poincare/include/poincare/matrix_trace.h
@@ -24,7 +24,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/matrix_transpose.h b/poincare/include/poincare/matrix_transpose.h
index 25e35102d..25624c6ef 100644
--- a/poincare/include/poincare/matrix_transpose.h
+++ b/poincare/include/poincare/matrix_transpose.h
@@ -24,7 +24,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/multiplication.h b/poincare/include/poincare/multiplication.h
index e2a191c6f..d239f0af0 100644
--- a/poincare/include/poincare/multiplication.h
+++ b/poincare/include/poincare/multiplication.h
@@ -44,7 +44,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   Expression denominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override;
 
diff --git a/poincare/include/poincare/naperian_logarithm.h b/poincare/include/poincare/naperian_logarithm.h
index acb96931d..4ea96319c 100644
--- a/poincare/include/poincare/naperian_logarithm.h
+++ b/poincare/include/poincare/naperian_logarithm.h
@@ -25,7 +25,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   /* Evaluation */
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
     /* ln has a branch cut on ]-inf, 0]: it is then multivalued on this cut. We
diff --git a/poincare/include/poincare/nth_root.h b/poincare/include/poincare/nth_root.h
index a043a7e2c..78e2861ca 100644
--- a/poincare/include/poincare/nth_root.h
+++ b/poincare/include/poincare/nth_root.h
@@ -24,7 +24,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/opposite.h b/poincare/include/poincare/opposite.h
index 40bbdd5a1..e3a1211f0 100644
--- a/poincare/include/poincare/opposite.h
+++ b/poincare/include/poincare/opposite.h
@@ -41,7 +41,7 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode = Preferences::PrintFloatMode::Decimal, int numberOfSignificantDigits = 0) const override;
 
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 };
 
 class Opposite final : public Expression {
diff --git a/poincare/include/poincare/parenthesis.h b/poincare/include/poincare/parenthesis.h
index bf1aa5c23..245e41581 100644
--- a/poincare/include/poincare/parenthesis.h
+++ b/poincare/include/poincare/parenthesis.h
@@ -26,7 +26,7 @@ public:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
   // Approximation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/permute_coefficient.h b/poincare/include/poincare/permute_coefficient.h
index f80b81096..f068a225c 100644
--- a/poincare/include/poincare/permute_coefficient.h
+++ b/poincare/include/poincare/permute_coefficient.h
@@ -31,7 +31,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/power.h b/poincare/include/poincare/power.h
index 3799bec05..ab78b950a 100644
--- a/poincare/include/poincare/power.h
+++ b/poincare/include/poincare/power.h
@@ -45,7 +45,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplify
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   int simplificationOrderGreaterType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
   int simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
diff --git a/poincare/include/poincare/prediction_interval.h b/poincare/include/poincare/prediction_interval.h
index a664cfcea..525383fa7 100644
--- a/poincare/include/poincare/prediction_interval.h
+++ b/poincare/include/poincare/prediction_interval.h
@@ -27,7 +27,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/rational.h b/poincare/include/poincare/rational.h
index 03e241a28..b490663d2 100644
--- a/poincare/include/poincare/rational.h
+++ b/poincare/include/poincare/rational.h
@@ -52,7 +52,7 @@ public:
   static int NaturalOrder(const RationalNode * i, const RationalNode * j);
 private:
   int simplificationOrderSameType(const ExpressionNode * e, bool ascending, bool canBeInterrupted) const override;
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   Expression setSign(Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
   Expression denominator(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override;
diff --git a/poincare/include/poincare/real_part.h b/poincare/include/poincare/real_part.h
index eefdc61eb..e898a6b68 100644
--- a/poincare/include/poincare/real_part.h
+++ b/poincare/include/poincare/real_part.h
@@ -29,7 +29,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
     return Complex<T>::Builder(std::real(c));
diff --git a/poincare/include/poincare/round.h b/poincare/include/poincare/round.h
index f08c6ee41..0962c72ef 100644
--- a/poincare/include/poincare/round.h
+++ b/poincare/include/poincare/round.h
@@ -28,7 +28,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<float>(context, complexFormat, angleUnit); }
   Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override { return templatedApproximate<double>(context, complexFormat, angleUnit); }
diff --git a/poincare/include/poincare/sign_function.h b/poincare/include/poincare/sign_function.h
index 23d197933..6686ef6a0 100644
--- a/poincare/include/poincare/sign_function.h
+++ b/poincare/include/poincare/sign_function.h
@@ -31,7 +31,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/sine.h b/poincare/include/poincare/sine.h
index 5137f0b5f..e147682b3 100644
--- a/poincare/include/poincare/sine.h
+++ b/poincare/include/poincare/sine.h
@@ -34,7 +34,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplication
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
   // Evaluation
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/square_root.h b/poincare/include/poincare/square_root.h
index 0cc02f5d0..a1e949a61 100644
--- a/poincare/include/poincare/square_root.h
+++ b/poincare/include/poincare/square_root.h
@@ -26,7 +26,7 @@ private:
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   // Simplification
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
   Evaluation<float> approximate(SinglePrecision p, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const override {
diff --git a/poincare/include/poincare/store.h b/poincare/include/poincare/store.h
index dbedd4df0..5b933e901 100644
--- a/poincare/include/poincare/store.h
+++ b/poincare/include/poincare/store.h
@@ -25,8 +25,8 @@ public:
 
 private:
   // Simplification
-  void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) override;
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  void deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   // Layout
   Layout createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
@@ -53,7 +53,7 @@ public:
   }
 
   // Expression
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation);
 
 private:
   Expression storeValueForSymbol(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
diff --git a/poincare/include/poincare/subtraction.h b/poincare/include/poincare/subtraction.h
index 9c43f93af..5ce51ebeb 100644
--- a/poincare/include/poincare/subtraction.h
+++ b/poincare/include/poincare/subtraction.h
@@ -39,7 +39,7 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   /* Simplification */
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
 private:
   /* Evaluation */
diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index 9abfdc876..347aac94c 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -36,7 +36,7 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   /* Simplification */
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
   Expression shallowReplaceReplaceableSymbols(Context & context) override;
 
   /* Approximation */
@@ -70,7 +70,7 @@ public:
   static bool isRegressionSymbol(const char * c);
 
   // Expression
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation);
   Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
   Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
   int getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const;
diff --git a/poincare/include/poincare/tangent.h b/poincare/include/poincare/tangent.h
index ee1ff3ec4..2c505c7f1 100644
--- a/poincare/include/poincare/tangent.h
+++ b/poincare/include/poincare/tangent.h
@@ -31,7 +31,7 @@ private:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
   // Simplication
-  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) override;
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 
   // Evaluation
   template<typename T> static Complex<T> computeOnComplex(const std::complex<T> c, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit = Preferences::AngleUnit::Radian);
diff --git a/poincare/src/absolute_value.cpp b/poincare/src/absolute_value.cpp
index a1053c10b..ce114dc9a 100644
--- a/poincare/src/absolute_value.cpp
+++ b/poincare/src/absolute_value.cpp
@@ -27,11 +27,10 @@ int AbsoluteValueNode::serialize(char * buffer, int bufferSize, Preferences::Pri
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, AbsoluteValue::s_functionHelper.name());
 }
 
-Expression AbsoluteValueNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression AbsoluteValueNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return AbsoluteValue(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
-
 Expression AbsoluteValue::setSign(ExpressionNode::Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
   assert(s == ExpressionNode::Sign::Positive);
   return *this;
diff --git a/poincare/src/addition.cpp b/poincare/src/addition.cpp
index 942cf5189..752db2fef 100644
--- a/poincare/src/addition.cpp
+++ b/poincare/src/addition.cpp
@@ -50,7 +50,7 @@ int AdditionNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
 
 // Simplication
 
-Expression AdditionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression AdditionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Addition(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/arc_cosine.cpp b/poincare/src/arc_cosine.cpp
index f0895fe00..46e7fd159 100644
--- a/poincare/src/arc_cosine.cpp
+++ b/poincare/src/arc_cosine.cpp
@@ -19,7 +19,7 @@ int ArcCosineNode::serialize(char * buffer, int bufferSize, Preferences::PrintFl
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, ArcCosine::s_functionHelper.name());
 }
 
-Expression ArcCosineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ArcCosineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ArcCosine(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/arc_sine.cpp b/poincare/src/arc_sine.cpp
index eb2fc0d21..8239d3fb9 100644
--- a/poincare/src/arc_sine.cpp
+++ b/poincare/src/arc_sine.cpp
@@ -19,7 +19,7 @@ int ArcSineNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloa
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, ArcSine::s_functionHelper.name());
 }
 
-Expression ArcSineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ArcSineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ArcSine(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/arc_tangent.cpp b/poincare/src/arc_tangent.cpp
index c63d9c7f6..f98a01900 100644
--- a/poincare/src/arc_tangent.cpp
+++ b/poincare/src/arc_tangent.cpp
@@ -44,7 +44,7 @@ Complex<T> ArcTangentNode::computeOnComplex(const std::complex<T> c, Preferences
   return Complex<T>::Builder(Trigonometry::ConvertRadianToAngleUnit(result, angleUnit));
 }
 
-Expression ArcTangentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ArcTangentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ArcTangent(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/binomial_coefficient.cpp b/poincare/src/binomial_coefficient.cpp
index 0c77913ff..ada1b413f 100644
--- a/poincare/src/binomial_coefficient.cpp
+++ b/poincare/src/binomial_coefficient.cpp
@@ -14,7 +14,7 @@ constexpr Expression::FunctionHelper BinomialCoefficient::s_functionHelper;
 
 int BinomialCoefficientNode::numberOfChildren() const { return BinomialCoefficient::s_functionHelper.numberOfChildren(); }
 
-Expression BinomialCoefficientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression BinomialCoefficientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return BinomialCoefficient(this).shallowReduce();
 }
 
diff --git a/poincare/src/ceiling.cpp b/poincare/src/ceiling.cpp
index 7dfeaef7f..907d48767 100644
--- a/poincare/src/ceiling.cpp
+++ b/poincare/src/ceiling.cpp
@@ -31,7 +31,7 @@ Complex<T> CeilingNode::computeOnComplex(const std::complex<T> c, Preferences::C
   return Complex<T>::Builder(std::ceil(c.real()));
 }
 
-Expression CeilingNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression CeilingNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Ceiling(this).shallowReduce();
 }
 
diff --git a/poincare/src/complex_argument.cpp b/poincare/src/complex_argument.cpp
index be4b24a7c..13dccd0e5 100644
--- a/poincare/src/complex_argument.cpp
+++ b/poincare/src/complex_argument.cpp
@@ -24,7 +24,7 @@ int ComplexArgumentNode::serialize(char * buffer, int bufferSize, Preferences::P
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, ComplexArgument::s_functionHelper.name());
 }
 
-Expression ComplexArgumentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ComplexArgumentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ComplexArgument(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/complex_cartesian.cpp b/poincare/src/complex_cartesian.cpp
index 2f1514791..f58c40d98 100644
--- a/poincare/src/complex_cartesian.cpp
+++ b/poincare/src/complex_cartesian.cpp
@@ -19,7 +19,7 @@
 
 namespace Poincare {
 
-Expression ComplexCartesianNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ComplexCartesianNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ComplexCartesian(this).shallowReduce();
 }
 
diff --git a/poincare/src/confidence_interval.cpp b/poincare/src/confidence_interval.cpp
index 1f7716e57..68bfc3d87 100644
--- a/poincare/src/confidence_interval.cpp
+++ b/poincare/src/confidence_interval.cpp
@@ -25,7 +25,7 @@ int ConfidenceIntervalNode::serialize(char * buffer, int bufferSize, Preferences
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, ConfidenceInterval::s_functionHelper.name());
 }
 
-Expression ConfidenceIntervalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ConfidenceIntervalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ConfidenceInterval(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/conjugate.cpp b/poincare/src/conjugate.cpp
index ba6bfe143..9d3f579e3 100644
--- a/poincare/src/conjugate.cpp
+++ b/poincare/src/conjugate.cpp
@@ -23,7 +23,7 @@ int ConjugateNode::serialize(char * buffer, int bufferSize, Preferences::PrintFl
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Conjugate::s_functionHelper.name());
 }
 
-Expression ConjugateNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ConjugateNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Conjugate(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/constant.cpp b/poincare/src/constant.cpp
index e2e8cac80..fc133768e 100644
--- a/poincare/src/constant.cpp
+++ b/poincare/src/constant.cpp
@@ -81,7 +81,7 @@ Evaluation<T> ConstantNode::templatedApproximate(Context& context, Preferences::
   return Complex<T>::Builder(M_E);
 }
 
-Expression ConstantNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ConstantNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Constant(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/cosine.cpp b/poincare/src/cosine.cpp
index 3f904d83a..a7063d9dc 100644
--- a/poincare/src/cosine.cpp
+++ b/poincare/src/cosine.cpp
@@ -30,7 +30,7 @@ int CosineNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Cosine::s_functionHelper.name());
 }
 
-Expression CosineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression CosineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Cosine(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/decimal.cpp b/poincare/src/decimal.cpp
index b92880660..812b5cdf7 100644
--- a/poincare/src/decimal.cpp
+++ b/poincare/src/decimal.cpp
@@ -86,7 +86,7 @@ int DecimalNode::simplificationOrderSameType(const ExpressionNode * e, bool asce
   return ((int)Number(this).sign())*unsignedComparison;
 }
 
-Expression DecimalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DecimalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Decimal(this).shallowReduce();
 }
 
diff --git a/poincare/src/derivative.cpp b/poincare/src/derivative.cpp
index 1c1d66a3e..0965d441c 100644
--- a/poincare/src/derivative.cpp
+++ b/poincare/src/derivative.cpp
@@ -39,7 +39,7 @@ int DerivativeNode::serialize(char * buffer, int bufferSize, Preferences::PrintF
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Derivative::s_functionHelper.name());
 }
 
-Expression DerivativeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DerivativeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Derivative(this).shallowReduce();
 }
 
diff --git a/poincare/src/determinant.cpp b/poincare/src/determinant.cpp
index 7a4a7b110..e41a2c6ea 100644
--- a/poincare/src/determinant.cpp
+++ b/poincare/src/determinant.cpp
@@ -28,7 +28,7 @@ Evaluation<T> DeterminantNode::templatedApproximate(Context& context, Preference
   return Complex<T>::Builder(input.determinant());
 }
 
-Expression DeterminantNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DeterminantNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Determinant(this).shallowReduce(context);
 }
 
diff --git a/poincare/src/division.cpp b/poincare/src/division.cpp
index ae63cb861..cac81e0a2 100644
--- a/poincare/src/division.cpp
+++ b/poincare/src/division.cpp
@@ -42,7 +42,7 @@ int DivisionNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, "/");
 }
 
-Expression DivisionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DivisionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Division(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/division_quotient.cpp b/poincare/src/division_quotient.cpp
index 853eb1b56..b79fc1440 100644
--- a/poincare/src/division_quotient.cpp
+++ b/poincare/src/division_quotient.cpp
@@ -12,7 +12,7 @@ constexpr Expression::FunctionHelper DivisionQuotient::s_functionHelper;
 
 int DivisionQuotientNode::numberOfChildren() const { return DivisionQuotient::s_functionHelper.numberOfChildren(); }
 
-Expression DivisionQuotientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DivisionQuotientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return DivisionQuotient(this).shallowReduce();
 }
 
diff --git a/poincare/src/division_remainder.cpp b/poincare/src/division_remainder.cpp
index f4334e0ee..6086163e0 100644
--- a/poincare/src/division_remainder.cpp
+++ b/poincare/src/division_remainder.cpp
@@ -20,7 +20,7 @@ int DivisionRemainderNode::serialize(char * buffer, int bufferSize, Preferences:
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, DivisionRemainder::s_functionHelper.name());
 }
 
-Expression DivisionRemainderNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression DivisionRemainderNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return DivisionRemainder(this).shallowReduce();
 }
 
diff --git a/poincare/src/equal.cpp b/poincare/src/equal.cpp
index 338ac935f..40778dd6e 100644
--- a/poincare/src/equal.cpp
+++ b/poincare/src/equal.cpp
@@ -20,7 +20,7 @@ extern "C" {
 }
 namespace Poincare {
 
-Expression EqualNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression EqualNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Equal(this).shallowReduce();
 }
 
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 147304004..3a0e65b85 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -217,9 +217,9 @@ bool Expression::getLinearCoefficients(char * variables, int maxVariableSize, Ex
 
 // Private
 
-void Expression::defaultDeepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+void Expression::defaultDeepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   for (int i = 0; i < numberOfChildren(); i++) {
-    childAtIndex(i).deepReduce(context, complexFormat, angleUnit, target);
+    childAtIndex(i).deepReduce(context, complexFormat, angleUnit, target, symbolicComputation);
   }
 }
 
@@ -388,7 +388,7 @@ bool Expression::isEqualToItsApproximationLayout(Expression approximation, char
    * identical. (For example, 0.000025 might be displayed "0.00003" and stored
    * as Decimal(0.000025) and isEqualToItsApproximationLayout should return
    * false) */
-  Expression approximateOutput = Expression::ParseAndSimplify(buffer, context, complexFormat, angleUnit);
+  Expression approximateOutput = Expression::ParseAndSimplify(buffer, context, complexFormat, angleUnit, true);
   bool equal = isIdenticalTo(approximateOutput);
   return equal;
 }
@@ -403,12 +403,12 @@ int Expression::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
 
 /* Simplification */
 
-Expression Expression::ParseAndSimplify(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
+Expression Expression::ParseAndSimplify(const char * text, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicSimplification) {
   Expression exp = Parse(text);
   if (exp.isUninitialized()) {
     return Undefined::Builder();
   }
-  exp = exp.simplify(context, complexFormat, angleUnit);
+  exp = exp.simplify(context, complexFormat, angleUnit, symbolicSimplification);
   /* simplify might have been interrupted, in which case the resulting
    * expression is uninitialized, so we need to check that. */
   if (exp.isUninitialized()) {
@@ -417,7 +417,7 @@ Expression Expression::ParseAndSimplify(const char * text, Context & context, Pr
   return exp;
 }
 
-void Expression::ParseAndSimplifyAndApproximate(const char * text, Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
+void Expression::ParseAndSimplifyAndApproximate(const char * text, Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation) {
   assert(simplifiedExpression);
   Expression exp = Parse(text);
   if (exp.isUninitialized()) {
@@ -425,7 +425,7 @@ void Expression::ParseAndSimplifyAndApproximate(const char * text, Expression *
     *approximateExpression = Undefined::Builder();
     return;
   }
-  exp.simplifyAndApproximate(simplifiedExpression, approximateExpression, context, complexFormat, angleUnit);
+  exp.simplifyAndApproximate(simplifiedExpression, approximateExpression, context, complexFormat, angleUnit, symbolicComputation);
   /* simplify might have been interrupted, in which case the resulting
    * expression is uninitialized, so we need to check that. */
   if (simplifiedExpression->isUninitialized()) {
@@ -436,9 +436,9 @@ void Expression::ParseAndSimplifyAndApproximate(const char * text, Expression *
   }
 }
 
-Expression Expression::simplify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
+Expression Expression::simplify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation) {
   sSimplificationHasBeenInterrupted = false;
-  Expression e = deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System);
+  Expression e = deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System, symbolicComputation);
   if (!sSimplificationHasBeenInterrupted) {
     e = e.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System);
   }
@@ -452,53 +452,58 @@ void makePositive(Expression * e, bool * isNegative) {
   }
 }
 
-void Expression::simplifyAndApproximate(Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
+void Expression::simplifyAndApproximate(Expression * simplifiedExpression, Expression * approximateExpression, Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation) {
   assert(simplifiedExpression);
   sSimplificationHasBeenInterrupted = false;
   // Step 1: we reduce the expression
-  Expression e = clone().deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+  Expression e = clone().deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, symbolicComputation);
   if (sSimplificationHasBeenInterrupted) {
     sSimplificationHasBeenInterrupted = false;
-    e = deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System);
+    e = deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System, symbolicComputation);
   }
   *simplifiedExpression = Expression();
-  if (!sSimplificationHasBeenInterrupted) {
-    /* Case 1: the reduced expression is ComplexCartesian or pure real, we can
-     * take into account the complex format to display a+i*b or r*e^(i*th) */
-    if (e.type() == ExpressionNode::Type::ComplexCartesian || e.isReal(context)) {
-      ComplexCartesian ecomplex = e.type() == ExpressionNode::Type::ComplexCartesian ? static_cast<ComplexCartesian &>(e) : ComplexCartesian::Builder(e, Rational::Builder(0));
-      if (approximateExpression) {
-        /* Step 2: Approximation
-         * We compute the approximate expression from the Cartesian form to avoid
-         * unprecision. For example, if the result is the ComplexCartesian(a,b),
-         * the final expression is goind to be sqrt(a^2+b^2)*exp(i*arctan(b/a)...
-         * in Polar ComplexFormat. If we approximate this expression instead of
-         * ComplexCartesian(a,b), we are going to loose precision on the resulting
-         * complex.*/
-        // Clone the ComplexCartesian to use it to compute the approximation
-        ComplexCartesian ecomplexClone = ecomplex.clone().convert<ComplexCartesian>();
-        // To minimize the error on the approximation, we reduce the number of nodes in the expression by beautifying
-        ecomplexClone.real().deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
-        ecomplexClone.imag().deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
-        *approximateExpression = ecomplexClone.approximate<double>(context, complexFormat, angleUnit);
-      }
-      // Step 3: create the simplied expression with the required complex format
-      Expression ra = complexFormat == Preferences::ComplexFormat::Polar ? ecomplex.clone().convert<ComplexCartesian>().norm(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User).shallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User) : ecomplex.real();
-      Expression tb = complexFormat == Preferences::ComplexFormat::Polar ? ecomplex.argument(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User).shallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User) : ecomplex.imag();
-      ra = ra.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
-      tb = tb.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
-      bool raIsNegative = false;
-      bool tbIsNegative = false;
-      makePositive(&ra, &raIsNegative);
-      makePositive(&tb, &tbIsNegative);
-      *simplifiedExpression = CreateComplexExpression(ra, tb, complexFormat, ra.isUndefined() || tb.isUndefined(), IsZero(ra), IsOne(ra), IsZero(tb), IsOne(tb), raIsNegative, tbIsNegative);
-    } else {
-      /* Case 2: The reduced expression has a complex component that could not
-       * be bubbled up. */
-      *simplifiedExpression = e.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
-      if (approximateExpression) {
-        *approximateExpression = simplifiedExpression->approximate<double>(context, complexFormat, angleUnit);
-      }
+  if (sSimplificationHasBeenInterrupted) {
+    return;
+  }
+  /* Case 1: the reduced expression is ComplexCartesian or pure real, we can
+   * take into account the complex format to display a+i*b or r*e^(i*th) */
+  if (e.type() == ExpressionNode::Type::ComplexCartesian || e.isReal(context)) {
+    ComplexCartesian ecomplex = e.type() == ExpressionNode::Type::ComplexCartesian ? static_cast<ComplexCartesian &>(e) : ComplexCartesian::Builder(e, Rational::Builder(0));
+    if (approximateExpression) {
+      /* Step 2: Approximation
+       * We compute the approximate expression from the Cartesian form to avoid
+       * unprecision. For example, if the result is the ComplexCartesian(a,b),
+       * the final expression is goind to be sqrt(a^2+b^2)*exp(i*arctan(b/a)...
+       * in Polar ComplexFormat. If we approximate this expression instead of
+       * ComplexCartesian(a,b), we are going to loose precision on the resulting
+       * complex.*/
+      // Clone the ComplexCartesian to use it to compute the approximation
+      ComplexCartesian ecomplexClone = ecomplex.clone().convert<ComplexCartesian>();
+      // To minimize the error on the approximation, we reduce the number of nodes in the expression by beautifying
+      ecomplexClone.real().deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+      ecomplexClone.imag().deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+      *approximateExpression = ecomplexClone.approximate<double>(context, complexFormat, angleUnit);
+    }
+    // Step 3: create the simplied expression with the required complex format
+    Expression ra = complexFormat == Preferences::ComplexFormat::Polar ?
+      ecomplex.clone().convert<ComplexCartesian>().norm(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User).shallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, symbolicComputation) :
+      ecomplex.real();
+    Expression tb = complexFormat == Preferences::ComplexFormat::Polar ?
+      ecomplex.argument(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User).shallowReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User, symbolicComputation) :
+      ecomplex.imag();
+    ra = ra.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+    tb = tb.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+    bool raIsNegative = false;
+    bool tbIsNegative = false;
+    makePositive(&ra, &raIsNegative);
+    makePositive(&tb, &tbIsNegative);
+    *simplifiedExpression = CreateComplexExpression(ra, tb, complexFormat, ra.isUndefined() || tb.isUndefined(), IsZero(ra), IsOne(ra), IsZero(tb), IsOne(tb), raIsNegative, tbIsNegative);
+  } else {
+    /* Case 2: The reduced expression has a complex component that could not
+     * be bubbled up. */
+    *simplifiedExpression = e.deepBeautify(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::User);
+    if (approximateExpression) {
+      *approximateExpression = simplifiedExpression->approximate<double>(context, complexFormat, angleUnit);
     }
   }
 }
@@ -546,10 +551,10 @@ Expression Expression::degreeToRadian() {
 
 Expression Expression::reduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
   sSimplificationHasBeenInterrupted = false;
-  return deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System);
+  return deepReduce(context, complexFormat, angleUnit, ExpressionNode::ReductionTarget::System, true);
 }
 
-Expression Expression::deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression Expression::deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
 #if MATRIX_EXACT_REDUCING
 #else
   if (IsMatrix(*this, context, true)) {
@@ -558,11 +563,11 @@ Expression Expression::deepReduce(Context & context, Preferences::ComplexFormat
   }
 #endif
 
-  deepReduceChildren(context, complexFormat, angleUnit, target);
+  deepReduceChildren(context, complexFormat, angleUnit, target, symbolicComputation);
   if (sSimplificationHasBeenInterrupted) {
     return *this;
   }
-  return shallowReduce(context, complexFormat, angleUnit, target);
+  return shallowReduce(context, complexFormat, angleUnit, target, symbolicComputation);
 }
 
 Expression Expression::deepBeautify(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
@@ -593,8 +598,8 @@ U Expression::approximateToScalar(Context& context, Preferences::ComplexFormat c
 }
 
 template<typename U>
-U Expression::ApproximateToScalar(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) {
-  Expression exp = ParseAndSimplify(text, context, complexFormat, angleUnit);
+U Expression::ApproximateToScalar(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicSimplification) {
+  Expression exp = ParseAndSimplify(text, context, complexFormat, angleUnit, symbolicSimplification);
   assert(!exp.isUninitialized());
   return exp.approximateToScalar<U>(context, complexFormat, angleUnit);
 }
@@ -1023,8 +1028,8 @@ template Expression Expression::approximate<double>(Context& context, Preference
 template float Expression::approximateToScalar(Context& context, Preferences::ComplexFormat, Preferences::AngleUnit angleUnit) const;
 template double Expression::approximateToScalar(Context& context, Preferences::ComplexFormat, Preferences::AngleUnit angleUnit) const;
 
-template float Expression::ApproximateToScalar<float>(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
-template double Expression::ApproximateToScalar<double>(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit);
+template float Expression::ApproximateToScalar<float>(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation);
+template double Expression::ApproximateToScalar<double>(const char * text, Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, bool symbolicComputation);
 
 template Evaluation<float> Expression::approximateToEvaluation(Context& context, Preferences::ComplexFormat, Preferences::AngleUnit angleUnit) const;
 template Evaluation<double> Expression::approximateToEvaluation(Context& context, Preferences::ComplexFormat, Preferences::AngleUnit angleUnit) const;
diff --git a/poincare/src/expression_node.cpp b/poincare/src/expression_node.cpp
index b62f1f916..d5e901b1d 100644
--- a/poincare/src/expression_node.cpp
+++ b/poincare/src/expression_node.cpp
@@ -108,11 +108,11 @@ int ExpressionNode::simplificationOrderSameType(const ExpressionNode * e, bool a
   return 0;
 }
 
-void ExpressionNode::deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
-  Expression(this).defaultDeepReduceChildren(context, complexFormat, angleUnit, target);
+void ExpressionNode::deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
+  Expression(this).defaultDeepReduceChildren(context, complexFormat, angleUnit, target, symbolicComputation);
 }
 
-Expression ExpressionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ExpressionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Expression(this).defaultShallowReduce();
 }
 
diff --git a/poincare/src/factorial.cpp b/poincare/src/factorial.cpp
index ff04ca490..c39f262cd 100644
--- a/poincare/src/factorial.cpp
+++ b/poincare/src/factorial.cpp
@@ -34,7 +34,7 @@ bool FactorialNode::childNeedsParenthesis(const TreeNode * child) const {
 
 // Simplification
 
-Expression FactorialNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression FactorialNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Factorial(this).shallowReduce();
 }
 
diff --git a/poincare/src/floor.cpp b/poincare/src/floor.cpp
index 12cc0cd91..b5dd5a21e 100644
--- a/poincare/src/floor.cpp
+++ b/poincare/src/floor.cpp
@@ -31,7 +31,7 @@ Complex<T> FloorNode::computeOnComplex(const std::complex<T> c, Preferences::Com
   return Complex<T>::Builder(std::floor(c.real()));
 }
 
-Expression FloorNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression FloorNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Floor(this).shallowReduce();
 }
 
diff --git a/poincare/src/frac_part.cpp b/poincare/src/frac_part.cpp
index e2877b965..4d804aa77 100644
--- a/poincare/src/frac_part.cpp
+++ b/poincare/src/frac_part.cpp
@@ -19,7 +19,7 @@ int FracPartNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, FracPart::s_functionHelper.name());
 }
 
-Expression FracPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression FracPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return FracPart(this).shallowReduce();
 }
 
diff --git a/poincare/src/function.cpp b/poincare/src/function.cpp
index 53b4a87d7..a4c4a9da0 100644
--- a/poincare/src/function.cpp
+++ b/poincare/src/function.cpp
@@ -5,6 +5,7 @@
 #include <poincare/serialization_helper.h>
 #include <poincare/simplification_helper.h>
 #include <poincare/symbol.h>
+#include <poincare/undefined.h>
 #include <cmath>
 
 namespace Poincare {
@@ -66,8 +67,8 @@ int FunctionNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, name());
 }
 
-Expression FunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
-  return Function(this).shallowReduce(context, complexFormat, angleUnit, target); // This uses Symbol::shallowReduce
+Expression FunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
+  return Function(this).shallowReduce(context, complexFormat, angleUnit, target, symbolicComputation); // This uses Symbol::shallowReduce
 }
 
 Expression FunctionNode::shallowReplaceReplaceableSymbols(Context & context) {
@@ -129,12 +130,17 @@ Expression Function::replaceSymbolWithExpression(const SymbolAbstract & symbol,
   return *this;
 }
 
-Expression Function::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression Function::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   Function f(*this);
   Expression e = SymbolAbstract::Expand(f, context, true);
   if (!e.isUninitialized()) {
     replaceWithInPlace(e);
-    return e.deepReduce(context, complexFormat, angleUnit, target);
+    return e.deepReduce(context, complexFormat, angleUnit, target, symbolicComputation);
+  }
+  if (!symbolicComputation) {
+    Expression result = Undefined::Builder();
+    replaceWithInPlace(result);
+    return result;
   }
   return *this;
 }
diff --git a/poincare/src/great_common_divisor.cpp b/poincare/src/great_common_divisor.cpp
index 7e27cb55c..d66ef0045 100644
--- a/poincare/src/great_common_divisor.cpp
+++ b/poincare/src/great_common_divisor.cpp
@@ -21,7 +21,7 @@ int GreatCommonDivisorNode::serialize(char * buffer, int bufferSize, Preferences
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, GreatCommonDivisor::s_functionHelper.name());
 }
 
-Expression GreatCommonDivisorNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression GreatCommonDivisorNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return GreatCommonDivisor(this).shallowReduce();
 }
 
diff --git a/poincare/src/hyperbolic_trigonometric_function.cpp b/poincare/src/hyperbolic_trigonometric_function.cpp
index 4d48654dc..11f779c30 100644
--- a/poincare/src/hyperbolic_trigonometric_function.cpp
+++ b/poincare/src/hyperbolic_trigonometric_function.cpp
@@ -2,7 +2,7 @@
 
 namespace Poincare {
 
-Expression HyperbolicTrigonometricFunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression HyperbolicTrigonometricFunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return HyperbolicTrigonometricFunction(this).shallowReduce();
 }
 
diff --git a/poincare/src/imaginary_part.cpp b/poincare/src/imaginary_part.cpp
index f50138ddf..e9975fa91 100644
--- a/poincare/src/imaginary_part.cpp
+++ b/poincare/src/imaginary_part.cpp
@@ -20,11 +20,10 @@ int ImaginaryPartNode::serialize(char * buffer, int bufferSize, Preferences::Pri
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, ImaginaryPart::s_functionHelper.name());
 }
 
-Expression ImaginaryPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ImaginaryPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return ImaginaryPart(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
-
 Expression ImaginaryPart::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
   {
     Expression e = Expression::defaultShallowReduce();
diff --git a/poincare/src/integral.cpp b/poincare/src/integral.cpp
index 1b62e05a3..eba73527d 100644
--- a/poincare/src/integral.cpp
+++ b/poincare/src/integral.cpp
@@ -45,7 +45,7 @@ int IntegralNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Integral::s_functionHelper.name());
 }
 
-Expression IntegralNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression IntegralNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Integral(this).shallowReduce();
 }
 
diff --git a/poincare/src/least_common_multiple.cpp b/poincare/src/least_common_multiple.cpp
index cc28523fb..6afcb5b4f 100644
--- a/poincare/src/least_common_multiple.cpp
+++ b/poincare/src/least_common_multiple.cpp
@@ -21,7 +21,7 @@ int LeastCommonMultipleNode::serialize(char * buffer, int bufferSize, Preference
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, LeastCommonMultiple::s_functionHelper.name());
 }
 
-Expression LeastCommonMultipleNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression LeastCommonMultipleNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return LeastCommonMultiple(this).shallowReduce();
 }
 
diff --git a/poincare/src/logarithm.cpp b/poincare/src/logarithm.cpp
index 659bd5e09..95c80e5c7 100644
--- a/poincare/src/logarithm.cpp
+++ b/poincare/src/logarithm.cpp
@@ -49,12 +49,12 @@ int LogarithmNode<T>::serialize(char * buffer, int bufferSize, Preferences::Prin
 }
 
 template<>
-Expression LogarithmNode<1>::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression LogarithmNode<1>::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   return CommonLogarithm(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
 template<>
-Expression LogarithmNode<2>::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression LogarithmNode<2>::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   return Logarithm(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/matrix_dimension.cpp b/poincare/src/matrix_dimension.cpp
index 5390a43d0..e0277df49 100644
--- a/poincare/src/matrix_dimension.cpp
+++ b/poincare/src/matrix_dimension.cpp
@@ -11,7 +11,7 @@ constexpr Expression::FunctionHelper MatrixDimension::s_functionHelper;
 
 int MatrixDimensionNode::numberOfChildren() const { return MatrixDimension::s_functionHelper.numberOfChildren(); }
 
-Expression MatrixDimensionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MatrixDimensionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return MatrixDimension(this).shallowReduce();
 }
 
diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index 4724ece55..ace409c44 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -11,7 +11,7 @@ constexpr Expression::FunctionHelper MatrixIdentity::s_functionHelper;
 
 int MatrixIdentityNode::numberOfChildren() const { return MatrixIdentity::s_functionHelper.numberOfChildren(); }
 
-Expression MatrixIdentityNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MatrixIdentityNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return MatrixIdentity(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/matrix_inverse.cpp b/poincare/src/matrix_inverse.cpp
index 24aba3623..e02f4984d 100644
--- a/poincare/src/matrix_inverse.cpp
+++ b/poincare/src/matrix_inverse.cpp
@@ -14,7 +14,7 @@ constexpr Expression::FunctionHelper MatrixInverse::s_functionHelper;
 
 int MatrixInverseNode::numberOfChildren() const { return MatrixInverse::s_functionHelper.numberOfChildren(); }
 
-Expression MatrixInverseNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MatrixInverseNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return MatrixInverse(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/matrix_trace.cpp b/poincare/src/matrix_trace.cpp
index dbe915cd7..11066de38 100644
--- a/poincare/src/matrix_trace.cpp
+++ b/poincare/src/matrix_trace.cpp
@@ -13,7 +13,7 @@ constexpr Expression::FunctionHelper MatrixTrace::s_functionHelper;
 
 int MatrixTraceNode::numberOfChildren() const { return MatrixTrace::s_functionHelper.numberOfChildren(); }
 
-Expression MatrixTraceNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MatrixTraceNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return MatrixTrace(this).shallowReduce();
 }
 
diff --git a/poincare/src/matrix_transpose.cpp b/poincare/src/matrix_transpose.cpp
index 8e8805d98..a4d080fce 100644
--- a/poincare/src/matrix_transpose.cpp
+++ b/poincare/src/matrix_transpose.cpp
@@ -12,7 +12,7 @@ constexpr Expression::FunctionHelper MatrixTranspose::s_functionHelper;
 
 int MatrixTransposeNode::numberOfChildren() const { return MatrixTranspose::s_functionHelper.numberOfChildren(); }
 
-Expression MatrixTransposeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MatrixTransposeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return MatrixTranspose(this).shallowReduce();
 }
 
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index 155d11dc1..b21f39e11 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -98,7 +98,7 @@ int MultiplicationNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   return SerializationHelper::Infix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, string);
 }
 
-Expression MultiplicationNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression MultiplicationNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Multiplication(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/naperian_logarithm.cpp b/poincare/src/naperian_logarithm.cpp
index 3891c30cc..5f62307dd 100644
--- a/poincare/src/naperian_logarithm.cpp
+++ b/poincare/src/naperian_logarithm.cpp
@@ -18,7 +18,7 @@ int NaperianLogarithmNode::serialize(char * buffer, int bufferSize, Preferences:
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, NaperianLogarithm::s_functionHelper.name());
 }
 
-Expression NaperianLogarithmNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression NaperianLogarithmNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return NaperianLogarithm(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/nth_root.cpp b/poincare/src/nth_root.cpp
index b7cbe9566..c11a01b43 100644
--- a/poincare/src/nth_root.cpp
+++ b/poincare/src/nth_root.cpp
@@ -28,7 +28,7 @@ int NthRootNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloa
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, NthRoot::s_functionHelper.name());
 }
 
-Expression NthRootNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression NthRootNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return NthRoot(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/opposite.cpp b/poincare/src/opposite.cpp
index acc25f9fe..70348262d 100644
--- a/poincare/src/opposite.cpp
+++ b/poincare/src/opposite.cpp
@@ -67,7 +67,7 @@ int OppositeNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return numberOfChar;
 }
 
-Expression OppositeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression OppositeNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Opposite(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/parenthesis.cpp b/poincare/src/parenthesis.cpp
index 3ad088ca9..e55d013b7 100644
--- a/poincare/src/parenthesis.cpp
+++ b/poincare/src/parenthesis.cpp
@@ -16,7 +16,7 @@ int ParenthesisNode::serialize(char * buffer, int bufferSize, Preferences::Print
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, "");
 }
 
-Expression ParenthesisNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression ParenthesisNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Parenthesis(this).shallowReduce();
 }
 
diff --git a/poincare/src/permute_coefficient.cpp b/poincare/src/permute_coefficient.cpp
index 2e01cd395..f974a8983 100644
--- a/poincare/src/permute_coefficient.cpp
+++ b/poincare/src/permute_coefficient.cpp
@@ -23,7 +23,7 @@ int PermuteCoefficientNode::serialize(char * buffer, int bufferSize, Preferences
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, PermuteCoefficient::s_functionHelper.name());
 }
 
-Expression PermuteCoefficientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression PermuteCoefficientNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return PermuteCoefficient(this).shallowReduce();
 }
 
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index 3472b3246..c1b5563d3 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -164,7 +164,7 @@ int PowerNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatM
 
 // Simplify
 
-Expression PowerNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression PowerNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Power(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/prediction_interval.cpp b/poincare/src/prediction_interval.cpp
index ac894f92b..9a78e0956 100644
--- a/poincare/src/prediction_interval.cpp
+++ b/poincare/src/prediction_interval.cpp
@@ -27,7 +27,7 @@ int PredictionIntervalNode::serialize(char * buffer, int bufferSize, Preferences
 }
 
 
-Expression PredictionIntervalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression PredictionIntervalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return PredictionInterval(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/rational.cpp b/poincare/src/rational.cpp
index e94eecd6d..d2b6dd9f8 100644
--- a/poincare/src/rational.cpp
+++ b/poincare/src/rational.cpp
@@ -137,7 +137,7 @@ int RationalNode::simplificationOrderSameType(const ExpressionNode * e, bool asc
 
 // Simplification
 
-Expression RationalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression RationalNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Rational(this).shallowReduce();
 }
 
diff --git a/poincare/src/real_part.cpp b/poincare/src/real_part.cpp
index 3fc75d22f..219fa6f87 100644
--- a/poincare/src/real_part.cpp
+++ b/poincare/src/real_part.cpp
@@ -20,7 +20,7 @@ int RealPartNode::serialize(char * buffer, int bufferSize, Preferences::PrintFlo
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, RealPart::s_functionHelper.name());
 }
 
-Expression RealPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression RealPartNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return RealPart(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/round.cpp b/poincare/src/round.cpp
index 416bd2037..3fd3f813b 100644
--- a/poincare/src/round.cpp
+++ b/poincare/src/round.cpp
@@ -21,7 +21,7 @@ int RoundNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatM
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Round::s_functionHelper.name());
 }
 
-Expression RoundNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression RoundNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Round(this).shallowReduce();
 }
 
diff --git a/poincare/src/sign_function.cpp b/poincare/src/sign_function.cpp
index cc8a8bf09..e24218e72 100644
--- a/poincare/src/sign_function.cpp
+++ b/poincare/src/sign_function.cpp
@@ -33,7 +33,7 @@ int SignFunctionNode::serialize(char * buffer, int bufferSize, Preferences::Prin
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, SignFunction::s_functionHelper.name());
 }
 
-Expression SignFunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression SignFunctionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return SignFunction(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/sine.cpp b/poincare/src/sine.cpp
index 7241efff2..2d38addfe 100644
--- a/poincare/src/sine.cpp
+++ b/poincare/src/sine.cpp
@@ -30,7 +30,7 @@ int SineNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMo
   return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Sine::s_functionHelper.name());
 }
 
-Expression SineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression SineNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Sine(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/square_root.cpp b/poincare/src/square_root.cpp
index 243bbc37a..ab21de5ee 100644
--- a/poincare/src/square_root.cpp
+++ b/poincare/src/square_root.cpp
@@ -38,7 +38,7 @@ Complex<T> SquareRootNode::computeOnComplex(const std::complex<T> c, Preferences
   return Complex<T>::Builder(ApproximationHelper::TruncateRealOrImaginaryPartAccordingToArgument(result));
 }
 
-Expression SquareRootNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression SquareRootNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return SquareRoot(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 46fbacbbe..40b21c630 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -15,16 +15,15 @@ extern "C" {
 
 namespace Poincare {
 
-void StoreNode::deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+void StoreNode::deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   // Interrupt simplification if the expression stored contains a matrix
   if (Expression(childAtIndex(0)).recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return Expression::IsMatrix(e, context, replaceSymbols); }, context, true)) {
     Expression::SetInterruption(true);
   }
-  return;
 }
 
-Expression StoreNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
-  return Store(this).shallowReduce(context, complexFormat, angleUnit, target);
+Expression StoreNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
+  return Store(this).shallowReduce(context, complexFormat, angleUnit, target, symbolicComputation);
 }
 
 int StoreNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
@@ -52,21 +51,24 @@ Evaluation<T> StoreNode::templatedApproximate(Context& context, Preferences::Com
   return storedExpression.node()->approximate(T(), context, complexFormat, angleUnit);
 }
 
-Expression Store::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression Store::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
+  // Store the expression.
   Expression storedExpression = storeValueForSymbol(context, complexFormat, angleUnit);
 
-  /* We want to replace the store with its reduced left side. If the
-   * simplification of the left side failed, just replace with the left side of
-   * the store without simplifying it.
-   * The simplification fails for [x]->d(x) for instance, because we do not
-   * have exact simplification of matrices yet. */
-  bool interruptedSimplification = SimplificationHasBeenInterrupted();
-  Expression reducedE = storedExpression.clone().deepReduce(context, complexFormat, angleUnit, target);
-  if (!reducedE.isUninitialized() && !SimplificationHasBeenInterrupted()) {
-    storedExpression = reducedE;
+  if (symbol().type() == ExpressionNode::Type::Symbol) {
+    /* If the symbol is not a function, we want to replace the store with its
+     * reduced left side. If the simplification of the left side failed, just
+     * replace with the left side of the store without simplifying it.
+     * The simplification fails for [1+2]->a for instance, because we do not
+     * have exact simplification of matrices yet. */
+    bool interruptedSimplification = SimplificationHasBeenInterrupted();
+    Expression reducedE = storedExpression.clone().deepReduce(context, complexFormat, angleUnit, target, symbolicComputation);
+    if (!reducedE.isUninitialized() && !SimplificationHasBeenInterrupted()) {
+      storedExpression = reducedE;
+    }
+    // Restore the previous interruption flag
+    SetInterruption(interruptedSimplification);
   }
-  // Restore the previous interruption flag
-  SetInterruption(interruptedSimplification);
 
   replaceWithInPlace(storedExpression);
   return storedExpression;
diff --git a/poincare/src/subtraction.cpp b/poincare/src/subtraction.cpp
index 44f670cf2..9fd547aa8 100644
--- a/poincare/src/subtraction.cpp
+++ b/poincare/src/subtraction.cpp
@@ -52,7 +52,7 @@ template<typename T> MatrixComplex<T> SubtractionNode::computeOnComplexAndMatrix
   return result;
 }
 
-Expression SubtractionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression SubtractionNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Subtraction(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 1bb2f97d9..1d6ab04a4 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -121,8 +121,8 @@ int SymbolNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloat
   return strlcpy(buffer, m_name, bufferSize);
 }
 
-Expression SymbolNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
-  return Symbol(this).shallowReduce(context, complexFormat, angleUnit, target);
+Expression SymbolNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
+  return Symbol(this).shallowReduce(context, complexFormat, angleUnit, target, symbolicComputation);
 }
 
 Expression SymbolNode::shallowReplaceReplaceableSymbols(Context & context) {
@@ -180,15 +180,18 @@ bool Symbol::isRegressionSymbol(const char * c) {
   return false;
 }
 
-Expression Symbol::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+Expression Symbol::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   Symbol s = *this;
   Expression result = SymbolAbstract::Expand(s, context, true);
   if (result.isUninitialized()) {
-    return *this;
+    if (symbolicComputation) {
+      return *this;
+    }
+    result = Undefined::Builder();
   }
   replaceWithInPlace(result);
   // The stored expression is as entered by the user, so we need to call reduce
-  return result.deepReduce(context, complexFormat, angleUnit, target);
+  return result.deepReduce(context, complexFormat, angleUnit, target, symbolicComputation);
 }
 
 Expression Symbol::replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression) {
diff --git a/poincare/src/tangent.cpp b/poincare/src/tangent.cpp
index afb372d38..e1d339026 100644
--- a/poincare/src/tangent.cpp
+++ b/poincare/src/tangent.cpp
@@ -33,7 +33,7 @@ Complex<T> TangentNode::computeOnComplex(const std::complex<T> c, Preferences::C
   return Complex<T>::Builder(Trigonometry::RoundToMeaningfulDigits(res, angleInput));
 }
 
-Expression TangentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target) {
+Expression TangentNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
   return Tangent(this).shallowReduce(context, complexFormat, angleUnit, target);
 }
 

From 9f776b2f6f84a739b57d41be011aa1bb96fa7708 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 11:51:17 +0100
Subject: [PATCH 158/295] [test] Fix tests for no symbolic computation

---
 apps/calculation/test/calculation_store.cpp | 4 ++--
 poincare/test/store.cpp                     | 3 ++-
 poincare/test/user_variable.cpp             | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index e241fc4b5..84fb766dc 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -93,9 +93,9 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   assertCalculationDisplay("1/2", false, false, ::Calculation::Calculation::EqualSign::Equal, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("1/3", false, false, ::Calculation::Calculation::EqualSign::Approximation, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("1/0", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("2x-x", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x", "undef", &globalContext, &store);
+  assertCalculationDisplay("2x-x", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
   assertCalculationDisplay("[[1,2,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("[[1,x,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("[[1,x,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "[[1,undef,3]]", &globalContext, &store);
   assertCalculationDisplay("28^7", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("3+√(2)→a", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(2)+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
diff --git a/poincare/test/store.cpp b/poincare/test/store.cpp
index 17a447621..6c4cbee5a 100644
--- a/poincare/test/store.cpp
+++ b/poincare/test/store.cpp
@@ -54,7 +54,8 @@ QUIZ_CASE(poincare_store_overwrite) {
 
 QUIZ_CASE(poincare_store_do_not_overwrite) {
   assert_parsed_expression_simplify_to("-1→g(x)", "-1");
-  assert_parsed_expression_simplify_to("1+g(x)→f(x)", "0");
+  assert_parsed_expression_simplify_to("1+g(x)→f(x)", "g(x)+1");
+  assert_parsed_expression_evaluates_to<double>("f(1)", "0");
   assert_parsed_expression_simplify_to("2→g", Undefined::Name());
   assert_parsed_expression_evaluates_to<double>("g(4)", "-1");
   assert_parsed_expression_evaluates_to<double>("f(4)", "0");
diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index f22fdd477..ea66cbf23 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -23,7 +23,7 @@ QUIZ_CASE(poincare_user_variable_simple) {
   assert_parsed_expression_simplify_to("f2(Adadas)", "2");
 
   // Define fBoth with f1 and f2
-  assert_parsed_expression_simplify_to("f1(x)+f2(x)→fBoth(x)", "2×x");
+  assert_parsed_expression_simplify_to("f1(x)+f2(x)→fBoth(x)", "f1(x)+f2(x)");
   assert_parsed_expression_simplify_to("fBoth(4)", "8");
   assert_parsed_expression_simplify_to("fBoth(Adadas)", "6");
 

From a9e4737deaf67c2d85b8e0bfd88eb61a2244431f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 11:51:38 +0100
Subject: [PATCH 159/295] [apps/solver] Test: conj(x)*x+1 should not be
 considered as polynom

---
 apps/solver/test/equation_store.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index 942bcd8fc..274514ea1 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -176,6 +176,12 @@ QUIZ_CASE(equation_solve) {
   const char * equations19[] = {"Big1+Big2=0", "3Big1+Big2=-5", 0};
   const char * solutions19[] = {"-(5)/(2)", "(5)/(2)"};
   assert_equation_system_exact_solve_to(equations19,  EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variablesBig1Big2, solutions19, 2);
+
+  // conj(x)*x+1 = 0
+  const char * equations20one = "conj(x)*x+1=0";
+  const char * equations20[] = {equations20one, 0};
+  assert_equation_system_exact_solve_to(equations20, EquationStore::Error::RequireApproximateSolution, EquationStore::Type::LinearSystem, (const char **)variables1, nullptr, 0);
+  assert_equation_approximate_solve_to(equations20one, -100.0, 100.0, "x", nullptr, 0, false);
 }
 
 QUIZ_CASE(equation_solve_complex_format) {

From 8b6fa5a79db652d7a415fddc86ecf7e8feaf80db Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 10:20:42 +0100
Subject: [PATCH 160/295] [poincare] A non defined symbol is not real

This fixes the equation "conj(x) * x +1", that should not be treated as
a polynom
---
 poincare/src/symbol_abstract.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index 412ef5d43..8ea0b00ed 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -74,7 +74,7 @@ Expression SymbolAbstract::Expand(const SymbolAbstract & symbol, Context & conte
 bool SymbolAbstract::isReal(const SymbolAbstract & symbol, Context & context) {
   Expression e = SymbolAbstract::Expand(symbol, context, false);
   if (e.isUninitialized()) {
-    return true;
+    return false;
   }
   return e.isReal(context);
 }

From 3774c343d1d56ad59e5d6b1ab4f2fbc66c697720 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 11:49:28 +0100
Subject: [PATCH 161/295] [test] Fix tests for unknown symbol is not real

---
 poincare/test/complex.cpp | 6 +++---
 poincare/test/power.cpp   | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/poincare/test/complex.cpp b/poincare/test/complex.cpp
index 76749ba06..e74e0e3ac 100644
--- a/poincare/test/complex.cpp
+++ b/poincare/test/complex.cpp
@@ -106,7 +106,7 @@ QUIZ_CASE(poincare_complex_simplify) {
   //assert_parsed_expression_simplify_to("prediction(-2,-3)", "prediction(-2)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("randint(2,4)", "randint(2,4)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("random()", "random()", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("re(x)", "x", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("re(x)", "re(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("round(x,y)", "round(x,y)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("sign(x)", "sign(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("sin(23)", "sin(23)", User, Radian, Cartesian);
@@ -163,14 +163,14 @@ QUIZ_CASE(poincare_complex_simplify) {
   assert_parsed_expression_simplify_to("-2×ℯ^(𝐢×π/2)", "2×ℯ^(-π/2×𝐢)", User, Radian, Polar);
 
   // User defined variable
-  assert_parsed_expression_simplify_to("a", "√(a^2)×ℯ^((-π×sign(a)+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("a", "a", User, Radian, Polar);
   // a = 2 + 𝐢
   assert_simplify("2+𝐢→a");
   assert_parsed_expression_simplify_to("a", "√(5)×ℯ^((-2×atan(2)+π)/2×𝐢)", User, Radian, Polar);
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
   // User defined function
-  assert_parsed_expression_simplify_to("f(3)", "√(f(3)^2)×ℯ^((-π×sign(f(3))+π)/2×𝐢)", User, Radian, Polar);
+  assert_parsed_expression_simplify_to("f(3)", "f(3)", User, Radian, Polar);
   // f: x → x+1
   assert_simplify("x+1+𝐢→f(x)");
   assert_parsed_expression_simplify_to("f(3)", "√(17)×ℯ^((-2×atan(4)+π)/2×𝐢)", User, Radian, Polar);
diff --git a/poincare/test/power.cpp b/poincare/test/power.cpp
index bf0a91b56..d9d8692b0 100644
--- a/poincare/test/power.cpp
+++ b/poincare/test/power.cpp
@@ -55,8 +55,8 @@ QUIZ_CASE(poincare_power_simplify) {
   assert_parsed_expression_simplify_to("4^0.5", "2");
   assert_parsed_expression_simplify_to("8^0.5", "2×√(2)");
   assert_parsed_expression_simplify_to("(12^4×3)^(0.5)", "144×√(3)");
-  assert_parsed_expression_simplify_to("(2^A)^B", "2^(A×B)");
-  assert_parsed_expression_simplify_to("(2×A)^B", "2^B×A^B");
+  assert_parsed_expression_simplify_to("(π^3)^4", "π^12");
+  assert_parsed_expression_simplify_to("(A×B)^3", "A^3×B^3");
   assert_parsed_expression_simplify_to("(12^4×x)^(0.5)", "144×√(x)");
   assert_parsed_expression_simplify_to("√(32)", "4×√(2)");
   assert_parsed_expression_simplify_to("√(-1)", "𝐢");

From f14c56badfc5d97c21f3ab8808a729124835b45e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 11:54:01 +0100
Subject: [PATCH 162/295] [calculation/test] Rename some test method arguments

---
 apps/calculation/test/calculation_store.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 84fb766dc..340ca5a04 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -69,11 +69,12 @@ QUIZ_CASE(calculation_ans) {
   store.deleteAll();
 }
 
-void assertCalculationDisplay(const char * input, bool displayExactOutput, bool displayApproximateOutput, ::Calculation::Calculation::EqualSign sign, const char * exactOutput, const char * approximateOutput, Context * context, CalculationStore * store) {
+void assertCalculationDisplay(const char * input, bool displayExactOutputOnly, bool displayApproximateOutputOnly, ::Calculation::Calculation::EqualSign sign, const char * exactOutput, const char * approximateOutput, Context * context, CalculationStore * store) {
+  quiz_assert(!(displayExactOutputOnly && displayApproximateOutputOnly));
   store->push(input, context);
   ::Calculation::Calculation * lastCalculation = store->calculationAtIndex(1);
-  quiz_assert(lastCalculation->shouldOnlyDisplayExactOutput() == displayExactOutput);
-  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(context) == displayApproximateOutput);
+  quiz_assert(lastCalculation->shouldOnlyDisplayExactOutput() == displayExactOutputOnly);
+  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(context) == displayApproximateOutputOnly);
   if (sign != ::Calculation::Calculation::EqualSign::Unknown) {
     quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(context) == sign);
   }

From 6839c9f8a2b8ae1a3cc69a23ac3c194df65146bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 28 Mar 2019 12:08:27 +0100
Subject: [PATCH 163/295] [apps/calculation] Add tests about no symbolic
 computation

---
 apps/calculation/test/calculation_store.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 340ca5a04..abbc680d1 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -108,6 +108,23 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 }
 
+QUIZ_CASE(calculation_symbolic_computation) {
+  Shared::GlobalContext globalContext;
+  CalculationStore store;
+
+  assertCalculationDisplay("x+x+1+3+√(π)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("1+x→f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x+1", nullptr, &globalContext, &store);
+  assertCalculationDisplay("f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(2)", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
+  assertCalculationDisplay("2→x", false, true, ::Calculation::Calculation::EqualSign::Equal, "2", nullptr, &globalContext, &store);
+  assertCalculationDisplay("f(x)", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("x+x+1+3+√(π)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(π)+8", nullptr, &globalContext, &store);
+
+  Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
+  Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
+}
+
 QUIZ_CASE(calculation_complex_format) {
   Shared::GlobalContext globalContext;
   CalculationStore store;

From f95cbd499855d8e30c78ea553dd5ec8c509c3ca1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 11:02:59 +0200
Subject: [PATCH 164/295] [poincare] Do not replace a symbol if it is an
 expression's parameter

---
 poincare/include/poincare/symbol.h |  1 +
 poincare/src/symbol.cpp            | 31 +++++++++++++++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/poincare/include/poincare/symbol.h b/poincare/include/poincare/symbol.h
index 347aac94c..5052bcf30 100644
--- a/poincare/include/poincare/symbol.h
+++ b/poincare/include/poincare/symbol.h
@@ -66,6 +66,7 @@ public:
 
   // Symbol properties
   bool isSystemSymbol() const { return node()->isUnknown(UCodePointUnknownX) || node()->isUnknown(UCodePointUnknownN); }
+  const char * name() const { return node()->name(); }
   static bool isSeriesSymbol(const char * c);
   static bool isRegressionSymbol(const char * c);
 
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 1d6ab04a4..06419a676 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -10,6 +10,7 @@
 #include <ion/unicode/utf8_decoder.h>
 #include <ion/unicode/utf8_helper.h>
 #include <cmath>
+#include <string.h>
 #include <assert.h>
 
 namespace Poincare {
@@ -181,6 +182,32 @@ bool Symbol::isRegressionSymbol(const char * c) {
 }
 
 Expression Symbol::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
+  Expression parentExpression = parent();
+  {
+    Expression current = *this;
+    Expression p = parentExpression;
+
+    while (!p.isUninitialized()) {
+      if (p.type() == ExpressionNode::Type::Integral) { //TODO
+        int index = p.indexOfChild(current);
+        if (index == 1) { //TODO 1 for everybody?
+          // The symbol is a paremetered expression's parameter
+          return *this;
+        }
+        if (index == 0) { //TODO
+          assert(p.childAtIndex(1).type() == ExpressionNode::Type::Symbol);
+          Expression untypedParameter = p.childAtIndex(1);
+          Symbol parameter = static_cast<Symbol &>(untypedParameter);
+          if (strcmp(parameter.name(), name()) == 0) {
+            return *this;
+          }
+        }
+      }
+      current = p;
+      p = current.parent();
+    }
+  }
+
   Symbol s = *this;
   Expression result = SymbolAbstract::Expand(s, context, true);
   if (result.isUninitialized()) {
@@ -189,7 +216,9 @@ Expression Symbol::shallowReduce(Context & context, Preferences::ComplexFormat c
     }
     result = Undefined::Builder();
   }
-  replaceWithInPlace(result);
+  if (!parentExpression.isUninitialized()) {
+    parentExpression.replaceChildInPlace(*this, result);
+  }
   // The stored expression is as entered by the user, so we need to call reduce
   return result.deepReduce(context, complexFormat, angleUnit, target, symbolicComputation);
 }

From 3dc8c11347bc5134b35b012a8014c96b0a7efafc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 11:31:52 +0200
Subject: [PATCH 165/295] [poincare] Parametered expression

---
 poincare/Makefile                             |  2 +-
 poincare/include/poincare/derivative.h        |  9 ++--
 poincare/include/poincare/integral.h          |  9 ++--
 .../include/poincare/parametered_expression.h | 45 +++++++++++++++++++
 .../poincare/parametered_expression_helper.h  | 28 ------------
 poincare/include/poincare/product.h           |  5 +--
 poincare/include/poincare/sequence.h          |  6 ++-
 poincare/include/poincare/sum.h               |  5 +--
 poincare/src/derivative.cpp                   |  5 ---
 poincare/src/integral.cpp                     |  6 ---
 poincare/src/parametered_expression.cpp       | 35 +++++++++++++++
 .../src/parametered_expression_helper.cpp     | 33 --------------
 poincare/src/product.cpp                      |  5 ---
 poincare/src/sum.cpp                          |  5 ---
 14 files changed, 97 insertions(+), 101 deletions(-)
 create mode 100644 poincare/include/poincare/parametered_expression.h
 delete mode 100644 poincare/include/poincare/parametered_expression_helper.h
 create mode 100644 poincare/src/parametered_expression.cpp
 delete mode 100644 poincare/src/parametered_expression_helper.cpp

diff --git a/poincare/Makefile b/poincare/Makefile
index 7528bb8ce..6689a9982 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -96,7 +96,7 @@ src += $(addprefix poincare/src/,\
   nth_root.cpp \
   number.cpp \
   opposite.cpp \
-  parametered_expression_helper.cpp \
+  parametered_expression.cpp \
   parenthesis.cpp \
   permute_coefficient.cpp \
   power.cpp \
diff --git a/poincare/include/poincare/derivative.h b/poincare/include/poincare/derivative.h
index 339a5c41e..8d26ecf0d 100644
--- a/poincare/include/poincare/derivative.h
+++ b/poincare/include/poincare/derivative.h
@@ -1,13 +1,13 @@
 #ifndef POINCARE_DERIVATIVE_H
 #define POINCARE_DERIVATIVE_H
 
-#include <poincare/expression.h>
+#include <poincare/parametered_expression.h>
 #include <poincare/symbol.h>
 #include <poincare/variable_context.h>
 
 namespace Poincare {
 
-class DerivativeNode final : public ExpressionNode {
+class DerivativeNode final : public ParameteredExpressionNode {
 public:
 
   // TreeNode
@@ -25,7 +25,6 @@ public:
   // Properties
   Type type() const override { return Type::Derivative; }
   int polynomialDegree(Context & context, const char * symbolName) const override;
-  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   // Layout
@@ -48,9 +47,9 @@ private:
   constexpr static double k_rateStepSize = 1.4;
 };
 
-class Derivative final : public Expression {
+class Derivative final : public ParameteredExpression {
 public:
-  Derivative(const DerivativeNode * n) : Expression(n) {}
+  Derivative(const DerivativeNode * n) : ParameteredExpression(n) {}
   static Derivative Builder(Expression child0, Symbol child1, Expression child2) { return TreeHandle::FixedArityBuilder<Derivative, DerivativeNode>(ArrayBuilder<TreeHandle>(child0, child1, child2).array(), 3); }
   static Expression UntypedBuilder(Expression children);
   static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("diff", 3, &UntypedBuilder);
diff --git a/poincare/include/poincare/integral.h b/poincare/include/poincare/integral.h
index c30bf4acb..6c176caa0 100644
--- a/poincare/include/poincare/integral.h
+++ b/poincare/include/poincare/integral.h
@@ -1,12 +1,12 @@
 #ifndef POINCARE_INTEGRAL_H
 #define POINCARE_INTEGRAL_H
 
-#include <poincare/expression.h>
+#include <poincare/parametered_expression.h>
 #include <poincare/symbol.h>
 
 namespace Poincare {
 
-class IntegralNode final : public ExpressionNode {
+class IntegralNode final : public ParameteredExpressionNode {
 public:
 
   // TreeNode
@@ -21,7 +21,6 @@ public:
   // ExpressionNode
   Type type() const override { return Type::Integral; }
   int polynomialDegree(Context & context, const char * symbolName) const override;
-  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
   // Complex
   bool isReal(Context & context) const override { return true; }
@@ -52,9 +51,9 @@ private:
   template<typename T> T functionValueAtAbscissa(T x, Context & xcontext, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
 };
 
-class Integral final : public Expression {
+class Integral final : public ParameteredExpression {
 public:
-  Integral(const IntegralNode * n) : Expression(n) {}
+  Integral(const IntegralNode * n) : ParameteredExpression(n) {}
   static Integral Builder(Expression child0, Symbol child1, Expression child2, Expression child3) { return TreeHandle::FixedArityBuilder<Integral, IntegralNode>(ArrayBuilder<TreeHandle>(child0, child1, child2, child3).array(), 4); }
   static Expression UntypedBuilder(Expression children);
 
diff --git a/poincare/include/poincare/parametered_expression.h b/poincare/include/poincare/parametered_expression.h
new file mode 100644
index 000000000..9318ddf44
--- /dev/null
+++ b/poincare/include/poincare/parametered_expression.h
@@ -0,0 +1,45 @@
+#ifndef POINCARE_PARAMETERED_EXPRESSION_H
+#define POINCARE_PARAMETERED_EXPRESSION_H
+
+#include <poincare/expression.h>
+
+namespace Poincare {
+
+/* Parametered expressions are Integral, Derivative, Sum and Product. Their
+ * child at index 0 is parametered, and the child at index 1 is the parameter
+ * symbol. */
+
+class ParameteredExpressionNode : public ExpressionNode {
+public:
+  // Expression
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
+};
+
+class ParameteredExpression : public Expression {
+  friend class ParameteredExpressionNode;
+public:
+  // ParameteredExpression
+  static constexpr int ParameteredChildIndex() { return 0; }
+  static constexpr int ParameterChildIndex() { return 1; }
+
+  // Expression
+  /* We sometimes replace 'x' by 'UnknownX' to differentiate between a variable
+   * and a function parameter. For instance, when defining the function
+   * f(x)=cos(x) in Graph, we want x to be an unknown, instead of having f be
+   * the constant function equal to cos(user variable that is named x).
+   *
+   * In parametered expressions, we do not want to replace all the 'x' with
+   * unknowns: for instance, we want to change f(x)=diff(cos(x),x,x) into
+   * f(X)=diff(cos(x),x,X), X being an unknown. ReplaceUnknownInExpression does
+   * that. */
+  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
+protected:
+  ParameteredExpression(const ParameteredExpressionNode * node) : Expression(node) {}
+};
+
+static_assert(ParameteredExpression::ParameteredChildIndex() == 0, "ParameteredExpression::replaceUnknown might not be valid");
+static_assert(ParameteredExpression::ParameterChildIndex() == 1, "ParameteredExpression::replaceUnknown might not be valid");
+
+}
+
+#endif
diff --git a/poincare/include/poincare/parametered_expression_helper.h b/poincare/include/poincare/parametered_expression_helper.h
deleted file mode 100644
index 5198f8636..000000000
--- a/poincare/include/poincare/parametered_expression_helper.h
+++ /dev/null
@@ -1,28 +0,0 @@
-#ifndef POINCARE_PARAMETERED_EXPRESSION_HELPER_H
-#define POINCARE_PARAMETERED_EXPRESSION_HELPER_H
-
-#include <poincare/expression.h>
-
-namespace Poincare {
-
-class SymbolAbstract;
-class Symbol;
-
-// Parametered expressions are Integral, Derivative, Sum and Product.
-
-namespace ParameteredExpressionHelper {
-  /* We sometimes replace 'x' by 'UnknownX' to differentiate between a variable
-   * and a function parameter. For instance, when defining the function
-   * f(x)=cos(x) in Graph, we want x to be an unknown, instead of having f be
-   * the constant function equal to cos(user variable that is named x).
-   *
-   * In parametered expression, we do not want to replace all the 'x' with
-   * unknowns: for instance, we want to change f(x)=diff(cos(x),x,x) into
-   * f(X)=diff(cos(x),x,X), X being an unknown. ReplaceUnknownInExpression does
-   * that. */
-  Expression ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace, const Symbol & unknownSymbols);
-};
-
-}
-
-#endif
diff --git a/poincare/include/poincare/product.h b/poincare/include/poincare/product.h
index 578f3ffe0..071a178dd 100644
--- a/poincare/include/poincare/product.h
+++ b/poincare/include/poincare/product.h
@@ -16,7 +16,6 @@ public:
 #endif
 
   Type type() const override { return Type::Product; }
-  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   float emptySequenceValue() const override { return 1.0f; }
@@ -31,10 +30,10 @@ private:
   template<typename T> Evaluation<T> templatedApproximateWithNextTerm(Evaluation<T> a, Evaluation<T> b, Preferences::ComplexFormat complexFormat) const;
 };
 
-class Product final : public Expression {
+class Product final : public ParameteredExpression {
 friend class ProductNode;
 public:
-  Product(const ProductNode * n) : Expression(n) {}
+  Product(const ProductNode * n) : ParameteredExpression(n) {}
   static Product Builder(Expression child0, Symbol child1, Expression child2, Expression child3) { return TreeHandle::FixedArityBuilder<Product, ProductNode>(ArrayBuilder<TreeHandle>(child0, child1, child2, child3).array(), 4); }
   static Expression UntypedBuilder(Expression children);
 
diff --git a/poincare/include/poincare/sequence.h b/poincare/include/poincare/sequence.h
index e732c744e..ef0a45af0 100644
--- a/poincare/include/poincare/sequence.h
+++ b/poincare/include/poincare/sequence.h
@@ -1,13 +1,15 @@
 #ifndef POINCARE_SEQUENCE_H
 #define POINCARE_SEQUENCE_H
 
-#include <poincare/expression.h>
+#include <poincare/parametered_expression.h>
 #include <poincare/symbol.h>
 #include <poincare/approximation_helper.h>
 
 namespace Poincare {
 
-class SequenceNode : public ExpressionNode {
+// Sequences are Product and Sum
+
+class SequenceNode : public ParameteredExpressionNode {
 public:
   int numberOfChildren() const override { return 4; }
 private:
diff --git a/poincare/include/poincare/sum.h b/poincare/include/poincare/sum.h
index 81b549d52..175018ac9 100644
--- a/poincare/include/poincare/sum.h
+++ b/poincare/include/poincare/sum.h
@@ -16,7 +16,6 @@ public:
 #endif
 
   Type type() const override { return Type::Sum; }
-  Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 
 private:
   float emptySequenceValue() const override { return 0.0f; }
@@ -31,10 +30,10 @@ private:
   template<typename T> Evaluation<T> templatedApproximateWithNextTerm(Evaluation<T> a, Evaluation<T> b, Preferences::ComplexFormat complexFormat) const;
 };
 
-class Sum final : public Expression {
+class Sum final : public ParameteredExpression {
 friend class SumNode;
 public:
-  Sum(const SumNode * n) : Expression(n) {}
+  Sum(const SumNode * n) : ParameteredExpression(n) {}
   static Sum Builder(Expression child0, Symbol child1, Expression child2, Expression child3) { return TreeHandle::FixedArityBuilder<Sum, SumNode>(ArrayBuilder<TreeHandle>(child0, child1, child2, child3).array(), 4); }
   static Expression UntypedBuilder(Expression children);
 
diff --git a/poincare/src/derivative.cpp b/poincare/src/derivative.cpp
index 0965d441c..03115763c 100644
--- a/poincare/src/derivative.cpp
+++ b/poincare/src/derivative.cpp
@@ -1,6 +1,5 @@
 #include <poincare/derivative.h>
 #include <poincare/layout_helper.h>
-#include <poincare/parametered_expression_helper.h>
 #include <poincare/serialization_helper.h>
 #include <poincare/simplification_helper.h>
 #include <poincare/symbol.h>
@@ -27,10 +26,6 @@ int DerivativeNode::polynomialDegree(Context & context, const char * symbolName)
   return ExpressionNode::polynomialDegree(context, symbolName);
 }
 
-Expression DerivativeNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Derivative(this), symbol, unknownSymbol);
-}
-
 Layout DerivativeNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   return LayoutHelper::Prefix(this, floatDisplayMode, numberOfSignificantDigits, Derivative::s_functionHelper.name());
 }
diff --git a/poincare/src/integral.cpp b/poincare/src/integral.cpp
index eba73527d..d91a5e72f 100644
--- a/poincare/src/integral.cpp
+++ b/poincare/src/integral.cpp
@@ -1,8 +1,6 @@
 #include <poincare/integral.h>
-
 #include <poincare/complex.h>
 #include <poincare/integral_layout.h>
-#include <poincare/parametered_expression_helper.h>
 #include <poincare/serialization_helper.h>
 #include <poincare/symbol.h>
 #include <poincare/undefined.h>
@@ -29,10 +27,6 @@ int IntegralNode::polynomialDegree(Context & context, const char * symbolName) c
   return ExpressionNode::polynomialDegree(context, symbolName);
 }
 
-Expression IntegralNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Integral(this), symbol, unknownSymbol);
-}
-
 Layout IntegralNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
   return IntegralLayout::Builder(
       childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits),
diff --git a/poincare/src/parametered_expression.cpp b/poincare/src/parametered_expression.cpp
new file mode 100644
index 000000000..2dea52302
--- /dev/null
+++ b/poincare/src/parametered_expression.cpp
@@ -0,0 +1,35 @@
+#include <poincare/parametered_expression.h>
+#include <poincare/symbol.h>
+#include <string.h>
+#include <assert.h>
+
+namespace Poincare {
+
+Expression ParameteredExpressionNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
+  return ParameteredExpression(this).replaceUnknown(symbol, unknownSymbol);
+}
+
+Expression ParameteredExpression::replaceUnknown(const Symbol & symbolToReplace, const Symbol & unknownSymbol) {
+  assert(!symbolToReplace.isUninitialized());
+  assert(symbolToReplace.type() == ExpressionNode::Type::Symbol);
+
+  Expression c = childAtIndex(ParameterChildIndex());
+  assert(c.type() == ExpressionNode::Type::Symbol);
+  Symbol& parameterChild = static_cast<Symbol &>(c);
+  if (strcmp(parameterChild.name(), symbolToReplace.name()) != 0) {
+    // If the unknown is not the parameter, replace normally
+    return defaultReplaceUnknown(symbolToReplace, unknownSymbol);
+  }
+
+  /* If the unknown is the parameter, replace the unknown in all children except
+   * in the parameter and the parametered children */
+  int childrenCount = numberOfChildren();
+  assert(ParameteredChildIndex() == 0);
+  assert(ParameterChildIndex() == 1);
+  for (int i = 2; i < childrenCount; i++) {
+    childAtIndex(i).replaceUnknown(symbolToReplace, unknownSymbol);
+  }
+  return *this;
+}
+
+}
diff --git a/poincare/src/parametered_expression_helper.cpp b/poincare/src/parametered_expression_helper.cpp
deleted file mode 100644
index 07f4acb4e..000000000
--- a/poincare/src/parametered_expression_helper.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <poincare/parametered_expression_helper.h>
-#include <poincare/symbol.h>
-#include <string.h>
-#include <assert.h>
-
-namespace Poincare {
-
-Expression ParameteredExpressionHelper::ReplaceUnknownInExpression(Expression e, const Symbol & symbolToReplace, const Symbol & unknownSymbol) {
-  assert(!e.isUninitialized());
-  assert(e.type() == ExpressionNode::Type::Integral
-      || e.type() == ExpressionNode::Type::Derivative
-      || e.type() == ExpressionNode::Type::Sum
-      || e.type() == ExpressionNode::Type::Product);
-  assert(!symbolToReplace.isUninitialized());
-  assert(symbolToReplace.type() == ExpressionNode::Type::Symbol);
-
-  int numberOfChildren = e.numberOfChildren();
-  assert(numberOfChildren > 2);
-
-  Expression child1 = e.childAtIndex(1);
-  assert(child1.type() == ExpressionNode::Type::Symbol);
-
-  Symbol& parameterChild = static_cast<Symbol &>(child1);
-  if (strcmp(parameterChild.name(), symbolToReplace.name()) != 0) {
-    return e.defaultReplaceUnknown(symbolToReplace, unknownSymbol);
-  }
-  for (int i = 2; i < numberOfChildren; i++) {
-    e.childAtIndex(i).replaceUnknown(symbolToReplace, unknownSymbol);
-  }
-  return e;
-}
-
-}
diff --git a/poincare/src/product.cpp b/poincare/src/product.cpp
index 551c97a70..51759f281 100644
--- a/poincare/src/product.cpp
+++ b/poincare/src/product.cpp
@@ -1,6 +1,5 @@
 #include <poincare/product.h>
 #include <poincare/multiplication.h>
-#include <poincare/parametered_expression_helper.h>
 #include <poincare/product_layout.h>
 #include <poincare/layout_helper.h>
 #include <poincare/serialization_helper.h>
@@ -14,10 +13,6 @@ namespace Poincare {
 
 constexpr Expression::FunctionHelper Product::s_functionHelper;
 
-Expression ProductNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Product(this), symbol, unknownSymbol);
-}
-
 Layout ProductNode::createSequenceLayout(Layout argumentLayout, Layout symbolLayout, Layout subscriptLayout, Layout superscriptLayout) const {
   return ProductLayout::Builder(argumentLayout, symbolLayout, subscriptLayout, superscriptLayout);
 }
diff --git a/poincare/src/sum.cpp b/poincare/src/sum.cpp
index d83cf506c..ceee70feb 100644
--- a/poincare/src/sum.cpp
+++ b/poincare/src/sum.cpp
@@ -2,7 +2,6 @@
 #include <poincare/addition.h>
 #include <poincare/sum_layout.h>
 #include <poincare/layout_helper.h>
-#include <poincare/parametered_expression_helper.h>
 #include <poincare/serialization_helper.h>
 extern "C" {
 #include <assert.h>
@@ -14,10 +13,6 @@ namespace Poincare {
 
 constexpr Expression::FunctionHelper Sum::s_functionHelper;
 
-Expression SumNode::replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) {
-  return ParameteredExpressionHelper::ReplaceUnknownInExpression(Sum(this), symbol, unknownSymbol);
-}
-
 Layout SumNode::createSequenceLayout(Layout argumentLayout, Layout symbolLayout, Layout subscriptLayout, Layout superscriptLayout) const {
   return SumLayout::Builder(argumentLayout, symbolLayout, subscriptLayout, superscriptLayout);
 }

From 9472cc75b9d5fd1de7f8e5a00afc0cb6a226247f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 11:46:09 +0200
Subject: [PATCH 166/295] [poincare] Use ParameteredExpression in
 Symbol::shallowReduce

---
 poincare/include/poincare/expression.h             |  1 +
 poincare/include/poincare/expression_node.h        |  1 +
 poincare/include/poincare/parametered_expression.h |  1 +
 poincare/src/symbol.cpp                            | 11 ++++++-----
 4 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index de6eff556..5f0198e8f 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -134,6 +134,7 @@ public:
   bool isApproximate(Context & context) const;
   bool recursivelyMatchesInfinity(Context & context) { return recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Infinity; }, context, true); }
   static bool IsMatrix(const Expression e, Context & context, bool replaceSymbols);
+  bool isParameteredExpression() const { return node()->isParameteredExpression(); }
   /* 'characteristicXRange' tries to assess the range on x where the expression
    * (considered as a function on x) has an interesting evolution. For example,
    * the period of the function on 'x' if it is periodic. If
diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index 9087f8a81..917af418f 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -116,6 +116,7 @@ public:
   virtual Sign sign(Context * context) const { return Sign::Unknown; }
   virtual bool isNumber() const { return false; }
   virtual bool isRandom() const { return false; }
+  virtual bool isParameteredExpression() const { return false; }
   /*!*/ virtual Expression replaceSymbolWithExpression(const SymbolAbstract & symbol, const Expression & expression);
   /*!*/ virtual Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol);
   /*!*/ virtual Expression setSign(Sign s, Context * context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target);
diff --git a/poincare/include/poincare/parametered_expression.h b/poincare/include/poincare/parametered_expression.h
index 9318ddf44..63d0f6185 100644
--- a/poincare/include/poincare/parametered_expression.h
+++ b/poincare/include/poincare/parametered_expression.h
@@ -12,6 +12,7 @@ namespace Poincare {
 class ParameteredExpressionNode : public ExpressionNode {
 public:
   // Expression
+  bool isParameteredExpression() const override { return true; }
   Expression replaceUnknown(const Symbol & symbol, const Symbol & unknownSymbol) override;
 };
 
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 06419a676..4d64effca 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -3,6 +3,7 @@
 #include <poincare/context.h>
 #include <poincare/horizontal_layout.h>
 #include <poincare/layout_helper.h>
+#include <poincare/parametered_expression.h>
 #include <poincare/parenthesis.h>
 #include <poincare/rational.h>
 #include <poincare/undefined.h>
@@ -188,15 +189,15 @@ Expression Symbol::shallowReduce(Context & context, Preferences::ComplexFormat c
     Expression p = parentExpression;
 
     while (!p.isUninitialized()) {
-      if (p.type() == ExpressionNode::Type::Integral) { //TODO
+      if (p.isParameteredExpression()) {
         int index = p.indexOfChild(current);
-        if (index == 1) { //TODO 1 for everybody?
+        if (index == ParameteredExpression::ParameterChildIndex()) {
           // The symbol is a paremetered expression's parameter
           return *this;
         }
-        if (index == 0) { //TODO
-          assert(p.childAtIndex(1).type() == ExpressionNode::Type::Symbol);
-          Expression untypedParameter = p.childAtIndex(1);
+        if (index == ParameteredExpression::ParameteredChildIndex()) {
+          assert(p.childAtIndex(ParameteredExpression::ParameterChildIndex()).type() == ExpressionNode::Type::Symbol);
+          Expression untypedParameter = p.childAtIndex(ParameteredExpression::ParameterChildIndex());
           Symbol parameter = static_cast<Symbol &>(untypedParameter);
           if (strcmp(parameter.name(), name()) == 0) {
             return *this;

From 9e64655f5ab6c9764d03a99f8351e7d9f8eaf382 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 14:12:47 +0200
Subject: [PATCH 167/295] [poincare/tests] Parametered expressions + symbolic
 computation

---
 apps/calculation/test/calculation_store.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index abbc680d1..d19ac271e 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -125,6 +125,24 @@ QUIZ_CASE(calculation_symbolic_computation) {
   Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
 }
 
+QUIZ_CASE(calculation_symbolic_computation_and_parametered_expressions) {
+  Shared::GlobalContext globalContext;
+  CalculationStore store;
+
+  assertCalculationDisplay("int(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("sum(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
+  assertCalculationDisplay("product(x,x,1,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("diff(x^2,x,3)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
+  assertCalculationDisplay("2→x", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("int(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("sum(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
+  assertCalculationDisplay("product(x,x,1,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("diff(x^2,x,3)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
+
+  Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
+}
+
+
 QUIZ_CASE(calculation_complex_format) {
   Shared::GlobalContext globalContext;
   CalculationStore store;

From bcfe9469e8d727d70bd08cef4caa6404977d4f52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 14:32:06 +0200
Subject: [PATCH 168/295] [apps/tests/solver] Test equations + symbolic
 computation

---
 apps/solver/test/equation_store.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/apps/solver/test/equation_store.cpp b/apps/solver/test/equation_store.cpp
index 274514ea1..3452d6901 100644
--- a/apps/solver/test/equation_store.cpp
+++ b/apps/solver/test/equation_store.cpp
@@ -246,4 +246,23 @@ QUIZ_CASE(equation_solve_complex_format) {
 
 }
 
+QUIZ_CASE(equation_and_symbolic_computation) {
+
+  // x+a=0 : non linear system
+  const char * equation[] = {"x+a=0", 0};
+  assert_equation_system_exact_solve_to(equation, EquationStore::Error::NoError, EquationStore::Type::LinearSystem, nullptr, nullptr, INT_MAX);
+
+  // -3->a
+  Shared::GlobalContext globalContext;
+  Expression::ParseAndSimplify("-3→a", globalContext, Preferences::ComplexFormat::Polar, Preferences::AngleUnit::Degree);
+
+  // x+a = 0 : x = 3
+  const char * variables[] = {"x", ""};
+  const char * solutions[] = {"3"};
+  assert_equation_system_exact_solve_to(equation, EquationStore::Error::NoError, EquationStore::Type::LinearSystem, (const char **)variables, solutions, 1);
+
+  // Clean the storage
+  Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
+}
+
 }

From e8b3db76b2a01d2eb9b65cf6323377de90b165c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 14:53:36 +0200
Subject: [PATCH 169/295] [python/turtle] Fix rounding errors

Some horizontal/vertical lines were not properly drawn
Example script:
from math import *
from turtle import *
def a():
  def carre(n):
    fd(n)
    right(90)
    fd(n)
    right(90)
    fd(n)
    right(90)
    fd(n)
    right(90)
  penup()
  goto(-158,109)
  pendown()
  carre(100)
  for j in range(10):
    for i in range(26):
      penup()
      fd(2)
      pendown()
      carre(10)
      penup()
      fd(10)
      pendown()
    penup()
    goto(-158,109-10*(j+1))
    pendown()
---
 python/port/mod/turtle/turtle.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/port/mod/turtle/turtle.cpp b/python/port/mod/turtle/turtle.cpp
index 0b7dcad89..7a66d4240 100644
--- a/python/port/mod/turtle/turtle.cpp
+++ b/python/port/mod/turtle/turtle.cpp
@@ -118,8 +118,8 @@ bool Turtle::goTo(mp_float_t x, mp_float_t y) {
        * the computation of the position on the principal coordinate is done
        * using a barycenter, roundings might skip some pixels, which results in
        * a dotted line. */
-      mp_float_t currentX = principalDirection == PrincipalDirection::Y ? x * progress + oldx * (1 - progress) : oldx + (x > oldx ? i : -i);
-      mp_float_t currentY = principalDirection == PrincipalDirection::X ? y * progress + oldy * (1 - progress) : oldy + (y > oldy ? i : -i);
+      mp_float_t currentX = xLength == 0 ? x : (principalDirection == PrincipalDirection::Y ? x * progress + oldx * (1 - progress) : oldx + (x > oldx ? i : -i));
+      mp_float_t currentY = yLength == 0 ? y : (principalDirection == PrincipalDirection::X ? y * progress + oldy * (1 - progress) : oldy + (y > oldy ? i : -i));
       if (dot(currentX, currentY) || draw(false)) {
         // Keyboard interruption. Return now to let MicroPython process it.
         return true;

From 7b426adf5be2db1b7c72d334e0f15ef753ac6458 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 9 Apr 2019 09:43:00 +0200
Subject: [PATCH 170/295] [escher] Fix ExpressionField::inputViewHeight

Since commit

  [escher] Implement ScrollView::minimalSizeForOptimalDisplay including margins

minimalSizeForOptimalDisplay includes the ScrollView margins.
---
 escher/src/expression_field.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/escher/src/expression_field.cpp b/escher/src/expression_field.cpp
index 4f06d9dd0..043a80de4 100644
--- a/escher/src/expression_field.cpp
+++ b/escher/src/expression_field.cpp
@@ -113,7 +113,7 @@ KDCoordinate ExpressionField::inputViewHeight() const {
   return k_separatorThickness
     + (editionIsInTextField() ? k_textFieldHeight :
         minCoordinate(maximalHeight(),
-          maxCoordinate(k_textFieldHeight, m_layoutField.minimalSizeForOptimalDisplay().height() + 2*k_verticalMargin)));
+          maxCoordinate(k_textFieldHeight, m_layoutField.minimalSizeForOptimalDisplay().height())));
 }
 
 KDCoordinate ExpressionField::maximalHeight() const {

From 6f7fe5089a6941e5e692df68a8599e8ca36fc9f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Mon, 8 Apr 2019 15:25:58 +0200
Subject: [PATCH 171/295] [apps/calculation] Calculation::DisplayOutput can be
 Exact/Approx/Both

---
 apps/calculation/calculation.cpp            |  22 ++--
 apps/calculation/calculation.h              |   9 +-
 apps/calculation/history_view_cell.cpp      |   5 +-
 apps/calculation/test/calculation_store.cpp | 108 ++++++++++----------
 4 files changed, 77 insertions(+), 67 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index b263be966..ed260321a 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -64,13 +64,15 @@ KDCoordinate Calculation::height(Context * context) {
     KDCoordinate inputHeight = inputLayout.layoutSize().height();
     Layout approximateLayout = createApproximateOutputLayout(context);
     Layout exactLayout = createExactOutputLayout();
-    if (shouldOnlyDisplayExactOutput()) {
+    DisplayOutput display = displayOutput(context);
+    if (display == DisplayOutput::ExactOnly) {
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
       m_height = inputHeight+exactOutputHeight;
-    } else if (shouldOnlyDisplayApproximateOutput(context)) {
+    } else if (display == DisplayOutput::ApproximateOnly) {
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
       m_height = inputHeight+approximateOutputHeight;
     } else {
+      assert(display == DisplayOutput::ExactAndApproximate);
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
       KDCoordinate outputHeight = maxCoordinate(exactLayout.baseline(), approximateLayout.baseline()) + maxCoordinate(exactOutputHeight-exactLayout.baseline(), approximateOutputHeight-approximateLayout.baseline());
@@ -152,21 +154,23 @@ Layout Calculation::createApproximateOutputLayout(Context * context) {
   return PoincareHelpers::CreateLayout(approximateOutput(context));
 }
 
-bool Calculation::shouldOnlyDisplayApproximateOutput(Context * context) {
+Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
   if (shouldOnlyDisplayExactOutput()) {
-    return false;
+    return DisplayOutput::ExactOnly;
   }
+  bool approximateOnly = false;
   if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal
      * because of the number of significant digits, we display both. */
-    return exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal;
-  }
-  if (strcmp(m_exactOutputText, Undefined::Name()) == 0 || strcmp(m_approximateOutputText, Unreal::Name()) == 0) {
+    approximateOnly = exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal;
+  } else if (strcmp(m_exactOutputText, Undefined::Name()) == 0 || strcmp(m_approximateOutputText, Unreal::Name()) == 0) {
     // If the approximate result is 'unreal' or the exact result is 'undef'
-    return true;
+    approximateOnly = true;
+  } else {
+    approximateOnly = input().isApproximate(*context) || exactOutput().isApproximate(*context);
   }
-  return input().isApproximate(*context) || exactOutput().isApproximate(*context);
+  return approximateOnly ? DisplayOutput::ApproximateOnly : DisplayOutput::ExactAndApproximate;
 }
 
 bool Calculation::shouldOnlyDisplayExactOutput() {
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index 3a1c76806..0a4822209 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -17,6 +17,13 @@ public:
     Approximation,
     Equal
   };
+
+  enum class DisplayOutput : uint8_t {
+    ExactOnly,
+    ApproximateOnly,
+    ExactAndApproximate
+  };
+
   Calculation();
   bool operator==(const Calculation& c);
   /* c.reset() is the equivalent of c = Calculation() without copy assingment. */
@@ -34,7 +41,7 @@ public:
   Poincare::Layout createApproximateOutputLayout(Poincare::Context * context);
   bool isEmpty();
   void tidy();
-  bool shouldOnlyDisplayApproximateOutput(Poincare::Context * context);
+  DisplayOutput displayOutput(Poincare::Context * context);
   bool shouldOnlyDisplayExactOutput();
   EqualSign exactAndApproximateDisplayedOutputsAreEqual(Poincare::Context * context);
 private:
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 4ad73a9ef..fe0bba7a9 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -131,11 +131,12 @@ void HistoryViewCell::setCalculation(Calculation * calculation) {
   if (!m_rightOutputLayout.isUninitialized()) {
     m_rightOutputLayout = Poincare::Layout();
   }
-  if (calculation->shouldOnlyDisplayExactOutput()) {
+  Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
+  if (display == Calculation::DisplayOutput::ExactOnly) {
     m_rightOutputLayout = calculation->createExactOutputLayout();
   } else {
     m_rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());
-    if (!calculation->shouldOnlyDisplayApproximateOutput(calculationApp->localContext())) {
+    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
       m_leftOutputLayout = calculation->createExactOutputLayout();
     }
   }
diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index d19ac271e..0e9f7f7da 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -58,23 +58,21 @@ QUIZ_CASE(calculation_ans) {
   store.push("1+3/4", &globalContext);
   store.push("ans+2/3", &globalContext);
   ::Calculation::Calculation * lastCalculation = store.calculationAtIndex(1);
-  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(&globalContext) == false);
+  quiz_assert(lastCalculation->displayOutput(&globalContext) == ::Calculation::Calculation::DisplayOutput::ExactAndApproximate);
   quiz_assert(strcmp(lastCalculation->exactOutputText(),"29/12") == 0);
 
   store.push("ans+0.22", &globalContext);
   lastCalculation = store.calculationAtIndex(2);
-  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(&globalContext) == true);
+  quiz_assert(lastCalculation->displayOutput(&globalContext) == ::Calculation::Calculation::DisplayOutput::ApproximateOnly);
   quiz_assert(strcmp(lastCalculation->approximateOutputText(),"2.6366666666667") == 0);
 
   store.deleteAll();
 }
 
-void assertCalculationDisplay(const char * input, bool displayExactOutputOnly, bool displayApproximateOutputOnly, ::Calculation::Calculation::EqualSign sign, const char * exactOutput, const char * approximateOutput, Context * context, CalculationStore * store) {
-  quiz_assert(!(displayExactOutputOnly && displayApproximateOutputOnly));
+void assertCalculationDisplay(const char * input, ::Calculation::Calculation::DisplayOutput display, ::Calculation::Calculation::EqualSign sign, const char * exactOutput, const char * approximateOutput, Context * context, CalculationStore * store) {
   store->push(input, context);
   ::Calculation::Calculation * lastCalculation = store->calculationAtIndex(1);
-  quiz_assert(lastCalculation->shouldOnlyDisplayExactOutput() == displayExactOutputOnly);
-  quiz_assert(lastCalculation->shouldOnlyDisplayApproximateOutput(context) == displayApproximateOutputOnly);
+  quiz_assert(lastCalculation->displayOutput(context) == display);
   if (sign != ::Calculation::Calculation::EqualSign::Unknown) {
     quiz_assert(lastCalculation->exactAndApproximateDisplayedOutputsAreEqual(context) == sign);
   }
@@ -91,20 +89,20 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   Shared::GlobalContext globalContext;
   CalculationStore store;
 
-  assertCalculationDisplay("1/2", false, false, ::Calculation::Calculation::EqualSign::Equal, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("1/3", false, false, ::Calculation::Calculation::EqualSign::Approximation, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("1/0", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("2x-x", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("[[1,2,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("[[1,x,3]]", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "[[1,undef,3]]", &globalContext, &store);
-  assertCalculationDisplay("28^7", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("3+√(2)→a", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(2)+3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("1/2", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Equal, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("1/3", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("1/0", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("2x-x", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("[[1,2,3]]", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("[[1,x,3]]", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "[[1,undef,3]]", &globalContext, &store);
+  assertCalculationDisplay("28^7", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("3+√(2)→a", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "√(2)+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3+2→a", false, true, ::Calculation::Calculation::EqualSign::Equal, "5", "5", &globalContext, &store);
+  assertCalculationDisplay("3+2→a", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "5", "5", &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3→a", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
+  assertCalculationDisplay("3→a", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
-  assertCalculationDisplay("3+x→f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x+3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("3+x→f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "x+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
 }
 
@@ -112,14 +110,14 @@ QUIZ_CASE(calculation_symbolic_computation) {
   Shared::GlobalContext globalContext;
   CalculationStore store;
 
-  assertCalculationDisplay("x+x+1+3+√(π)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("1+x→f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "x+1", nullptr, &globalContext, &store);
-  assertCalculationDisplay("f(x)", true, false, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("f(2)", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
-  assertCalculationDisplay("2→x", false, true, ::Calculation::Calculation::EqualSign::Equal, "2", nullptr, &globalContext, &store);
-  assertCalculationDisplay("f(x)", false, true, ::Calculation::Calculation::EqualSign::Equal, "3", nullptr, &globalContext, &store);
-  assertCalculationDisplay("x+x+1+3+√(π)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(π)+8", nullptr, &globalContext, &store);
+  assertCalculationDisplay("x+x+1+3+√(π)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("1+x→f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "x+1", nullptr, &globalContext, &store);
+  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(2)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
+  assertCalculationDisplay("2→x", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "2", nullptr, &globalContext, &store);
+  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "3", nullptr, &globalContext, &store);
+  assertCalculationDisplay("x+x+1+3+√(π)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "√(π)+8", nullptr, &globalContext, &store);
 
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
   Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
@@ -129,15 +127,15 @@ QUIZ_CASE(calculation_symbolic_computation_and_parametered_expressions) {
   Shared::GlobalContext globalContext;
   CalculationStore store;
 
-  assertCalculationDisplay("int(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
-  assertCalculationDisplay("sum(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
-  assertCalculationDisplay("product(x,x,1,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
-  assertCalculationDisplay("diff(x^2,x,3)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
-  assertCalculationDisplay("2→x", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("int(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
-  assertCalculationDisplay("sum(x,x,0,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
-  assertCalculationDisplay("product(x,x,1,2)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
-  assertCalculationDisplay("diff(x^2,x,3)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
+  assertCalculationDisplay("int(x,x,0,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("sum(x,x,0,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
+  assertCalculationDisplay("product(x,x,1,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("diff(x^2,x,3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
+  assertCalculationDisplay("2→x", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("int(x,x,0,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("sum(x,x,0,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3", &globalContext, &store);
+  assertCalculationDisplay("product(x,x,1,2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "2", &globalContext, &store);
+  assertCalculationDisplay("diff(x^2,x,3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "6", &globalContext, &store);
 
   Ion::Storage::sharedStorage()->recordNamed("x.exp").destroy();
 }
@@ -148,31 +146,31 @@ QUIZ_CASE(calculation_complex_format) {
   CalculationStore store;
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Real);
-  assertCalculationDisplay("1+𝐢", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
-  assertCalculationDisplay("√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, "unreal", nullptr, &globalContext, &store);
-  assertCalculationDisplay("ln(-2)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
-  assertCalculationDisplay("√(-1)×√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(1/3)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-2", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(2/3)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "4", &globalContext, &store);
-  assertCalculationDisplay("(-2)^(1/4)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
+  assertCalculationDisplay("√(-1)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "unreal", nullptr, &globalContext, &store);
+  assertCalculationDisplay("ln(-2)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(1/3)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-2", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(2/3)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "4", &globalContext, &store);
+  assertCalculationDisplay("(-2)^(1/4)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "unreal", &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Cartesian);
-  assertCalculationDisplay("1+𝐢", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
-  assertCalculationDisplay("√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "𝐢", &globalContext, &store);
-  assertCalculationDisplay("ln(-2)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("√(-1)×√(-1)", false, true, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-1", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "1+√(3)×𝐢", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "-2+2×√(3)×𝐢", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(8,4)/2+root(8,4)/2×𝐢", nullptr, &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "1+𝐢", &globalContext, &store);
+  assertCalculationDisplay("√(-1)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "𝐢", &globalContext, &store);
+  assertCalculationDisplay("ln(-2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "-1", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(1/3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "1+√(3)×𝐢", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-8)^(2/3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "-2+2×√(3)×𝐢", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-2)^(1/4)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "root(8,4)/2+root(8,4)/2×𝐢", nullptr, &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Polar);
-  assertCalculationDisplay("1+𝐢", false, false, ::Calculation::Calculation::EqualSign::Approximation, "√(2)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("√(-1)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ℯ^(π/2×𝐢)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("ln(-2)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("√(-1)×√(-1)", false, false, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "ℯ^(3.1415926535898×𝐢)", &globalContext, &store);
-  assertCalculationDisplay("(-8)^(1/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "2×ℯ^(π/3×𝐢)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-8)^(2/3)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "4×ℯ^((2×π)/3×𝐢)", nullptr, &globalContext, &store);
-  assertCalculationDisplay("(-2)^(1/4)", false, false, ::Calculation::Calculation::EqualSign::Approximation, "root(2,4)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("1+𝐢", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "√(2)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "ℯ^(π/2×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("ln(-2)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "ln(-2)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("√(-1)×√(-1)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "ℯ^(3.1415926535898×𝐢)", &globalContext, &store);
+  assertCalculationDisplay("(-8)^(1/3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "2×ℯ^(π/3×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-8)^(2/3)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "4×ℯ^((2×π)/3×𝐢)", nullptr, &globalContext, &store);
+  assertCalculationDisplay("(-2)^(1/4)", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, "root(2,4)×ℯ^(π/4×𝐢)", nullptr, &globalContext, &store);
 
   Poincare::Preferences::sharedPreferences()->setComplexFormat(Poincare::Preferences::ComplexFormat::Cartesian);
 }

From b007286581c11d2e24bc4c7826d73cb7190d3ef7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 10 Apr 2019 14:22:09 +0200
Subject: [PATCH 172/295] [apps/calc] displayExactOuputOnly only if the input
 is store in function

This prevents 1+x->f(x) from displaying 1+x = undef
[[1,2]] + [[1][2]] displays undef
---
 apps/calculation/calculation.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index ed260321a..2a498d278 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -174,10 +174,10 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
 }
 
 bool Calculation::shouldOnlyDisplayExactOutput() {
-  /* If the approximateOutput is undef, do not display it. This prevents:
-   * x->f(x) from displaying x = undef
-   * x+x from displaying 2x = undef */
-  return strcmp(m_approximateOutputText, Undefined::Name()) == 0;
+  /* If the input is a "store in a function", do not display the approximate
+   * result. This prevents x->f(x) from displaying x = undef. */
+  return input().type() == ExpressionNode::Type::Store
+    && input().childAtIndex(1).type() == ExpressionNode::Type::Function;
 }
 
 Calculation::EqualSign Calculation::exactAndApproximateDisplayedOutputsAreEqual(Poincare::Context * context) {

From 972d86469f477dff886d9f5c8b8067dee3ef1b5d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 10 Apr 2019 16:07:32 +0200
Subject: [PATCH 173/295] [poincare] Fix Layout::replaceWithJuxtapositionOf

---
 poincare/src/layout.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/poincare/src/layout.cpp b/poincare/src/layout.cpp
index d55906954..98641e9bd 100644
--- a/poincare/src/layout.cpp
+++ b/poincare/src/layout.cpp
@@ -99,7 +99,7 @@ void Layout::replaceWithJuxtapositionOf(Layout leftChild, Layout rightChild, Lay
      * replaceWith. */
     HorizontalLayout horizontalLayoutR = HorizontalLayout::Builder();
     p.replaceChild(*this, horizontalLayoutR, cursor);
-    horizontalLayoutR.addOrMergeChildAtIndex(leftChild, 0, false);
+    horizontalLayoutR.addOrMergeChildAtIndex(leftChild, 0, true);
     if (putCursorInTheMiddle) {
       if (!horizontalLayoutR.isEmpty()) {
         cursor->setLayout(horizontalLayoutR.childAtIndex(horizontalLayoutR.numberOfChildren()-1));
@@ -109,7 +109,7 @@ void Layout::replaceWithJuxtapositionOf(Layout leftChild, Layout rightChild, Lay
         cursor->setPosition(LayoutCursor::Position::Left);
       }
     }
-    horizontalLayoutR.addOrMergeChildAtIndex(rightChild, 1, false);
+    horizontalLayoutR.addOrMergeChildAtIndex(rightChild, horizontalLayoutR.numberOfChildren(), true);
     return;
   }
   /* The parent is an Horizontal layout, so directly add the two juxtaposition

From 920f95997a31fbcfddabc010737e44eedb39145d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 4 Apr 2019 17:18:22 +0200
Subject: [PATCH 174/295] [ion] Dim Brightness before shutting down when the
 battery low

---
 apps/apps_container.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apps/apps_container.cpp b/apps/apps_container.cpp
index d516af358..34636cf7a 100644
--- a/apps/apps_container.cpp
+++ b/apps/apps_container.cpp
@@ -311,6 +311,7 @@ void AppsContainer::displayExamModePopUp(bool activate) {
 
 void AppsContainer::shutdownDueToLowBattery() {
   while (Ion::Battery::level() == Ion::Battery::Charge::EMPTY) {
+    Ion::Backlight::setBrightness(0);
     m_emptyBatteryWindow.redraw(true);
     Ion::Timing::msleep(3000);
     Ion::Power::suspend();

From d83fd2c0738007b9e3781a227f05dac3c6ff562d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 4 Apr 2019 17:20:10 +0200
Subject: [PATCH 175/295] [ion] Battery: change battery thresholds (LOW, EMPTY)

---
 ion/src/device/battery.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ion/src/device/battery.cpp b/ion/src/device/battery.cpp
index f3ed16364..ce64bff9d 100644
--- a/ion/src/device/battery.cpp
+++ b/ion/src/device/battery.cpp
@@ -18,10 +18,10 @@ bool isCharging() {
 }
 
 Charge level() {
-  if (voltage() < 3.2f) {
+  if (voltage() < 3.6f) {
     return Charge::EMPTY;
   }
-  if (voltage() < 3.5f) {
+  if (voltage() < 3.7f) {
     return Charge::LOW;
   }
   if (voltage() < 3.8f) {

From ce94b3d67a21ab49cdfd1b6f574d940ca7bd0199 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 10 Apr 2019 11:24:38 +0200
Subject: [PATCH 176/295] [apps] Redraw battery pictogram after a reset

---
 apps/apps_container.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/apps/apps_container.cpp b/apps/apps_container.cpp
index 34636cf7a..c79eac063 100644
--- a/apps/apps_container.cpp
+++ b/apps/apps_container.cpp
@@ -152,11 +152,13 @@ bool AppsContainer::dispatchEvent(Ion::Events::Event event) {
   if (event == Ion::Events::USBEnumeration) {
     if (Ion::USB::isPlugged()) {
       App::Snapshot * activeSnapshot = (activeApp() == nullptr ? appSnapshotAtIndex(0) : activeApp()->snapshot());
+      /* Just after a software update, the battery timer does not have time to
+       * fire before the calculator enters DFU mode. As the DFU mode blocks the
+       * event loop, we update the battery state "manually" here.
+       * We do it before switching to USB application to redraw the battery
+       * pictogram. */
+      updateBatteryState();
       if (switchTo(usbConnectedAppSnapshot())) {
-        /* Just after a software update, the battery timer does not have time to
-         * fire before the calculator enters DFU mode. As the DFU mode blocks the
-         * event loop, we update the battery state "manually" here. */
-        updateBatteryState();
         Ion::USB::DFU();
         bool switched = switchTo(activeSnapshot);
         assert(switched);

From f45350832161c3948b7faa33166ae2284f738c4c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 16 Apr 2019 13:51:59 +0200
Subject: [PATCH 177/295] [calculation] Fix tests with no symbolic computation

---
 apps/calculation/test/calculation_store.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 0e9f7f7da..86cf0167c 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -91,8 +91,8 @@ QUIZ_CASE(calculation_display_exact_approximate) {
 
   assertCalculationDisplay("1/2", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Equal, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("1/3", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Approximation, nullptr, nullptr, &globalContext, &store);
-  assertCalculationDisplay("1/0", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("2x-x", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("1/0", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("2x-x", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
   assertCalculationDisplay("[[1,2,3]]", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("[[1,x,3]]", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "[[1,undef,3]]", &globalContext, &store);
   assertCalculationDisplay("28^7", ::Calculation::Calculation::DisplayOutput::ExactAndApproximate, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
@@ -110,10 +110,10 @@ QUIZ_CASE(calculation_symbolic_computation) {
   Shared::GlobalContext globalContext;
   CalculationStore store;
 
-  assertCalculationDisplay("x+x+1+3+√(π)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
-  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("x+x+1+3+√(π)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
   assertCalculationDisplay("1+x→f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "x+1", nullptr, &globalContext, &store);
-  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
+  assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "undef", "undef", &globalContext, &store);
   assertCalculationDisplay("f(2)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "3", "3", &globalContext, &store);
   assertCalculationDisplay("2→x", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "2", nullptr, &globalContext, &store);
   assertCalculationDisplay("f(x)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Equal, "3", nullptr, &globalContext, &store);

From 32f4140637625c9099aa218862c0a45138eb0660 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 16 Apr 2019 13:54:05 +0200
Subject: [PATCH 178/295] [sequence] Cache context does not need to be a
 variable context

Fix crash: u(n) = n(n-1) would crash at evaluation
---
 apps/sequence/cache_context.cpp | 11 ++++++++---
 apps/sequence/cache_context.h   |  5 +++--
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/apps/sequence/cache_context.cpp b/apps/sequence/cache_context.cpp
index 96fb44608..0645e34e5 100644
--- a/apps/sequence/cache_context.cpp
+++ b/apps/sequence/cache_context.cpp
@@ -8,9 +8,9 @@ namespace Sequence {
 
 template<typename T>
 CacheContext<T>::CacheContext(Context * parentContext) :
-  VariableContext("n", parentContext),
   m_values{{NAN, NAN},
-    {NAN, NAN}}
+    {NAN, NAN}},
+  m_parentContext(parentContext)
 {
 }
 
@@ -24,7 +24,12 @@ const Expression CacheContext<T>::expressionForSymbol(const SymbolAbstract & sym
     Symbol s = const_cast<Symbol &>(static_cast<const Symbol &>(symbol));
     return Float<T>::Builder(m_values[nameIndexForSymbol(s)][rankIndexForSymbol(s)]);
   }
-  return VariableContext::expressionForSymbol(symbol, clone);
+  return m_parentContext->expressionForSymbol(symbol, clone);
+}
+
+template<typename T>
+void CacheContext<T>::setExpressionForSymbol(const Expression & expression, const SymbolAbstract & symbol, Context & context) {
+  m_parentContext->setExpressionForSymbol(expression, symbol, context);
 }
 
 template<typename T>
diff --git a/apps/sequence/cache_context.h b/apps/sequence/cache_context.h
index e9dc40560..011596ece 100644
--- a/apps/sequence/cache_context.h
+++ b/apps/sequence/cache_context.h
@@ -4,21 +4,22 @@
 #include <poincare/context.h>
 #include <poincare/expression.h>
 #include <poincare/symbol.h>
-#include <poincare/variable_context.h>
 #include "sequence_context.h"
 
 namespace Sequence {
 
 template<typename T>
-class CacheContext : public Poincare::VariableContext {
+class CacheContext : public Poincare::Context {
 public:
   CacheContext(Poincare::Context * parentContext);
   const Poincare::Expression expressionForSymbol(const Poincare::SymbolAbstract & symbol, bool clone) override;
+  void setExpressionForSymbol(const Poincare::Expression & expression, const Poincare::SymbolAbstract & symbol, Poincare::Context & context) override;
   void setValueForSymbol(T value, const Poincare::Symbol & symbol);
 private:
   int nameIndexForSymbol(const Poincare::Symbol & symbol);
   int rankIndexForSymbol(const Poincare::Symbol & symbol);
   T m_values[MaxNumberOfSequences][MaxRecurrenceDepth];
+  Context * m_parentContext;
 };
 
 }

From ca6ed6ab3b1dcb6a7fe88a05e32f776092ac8a5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 16 Apr 2019 14:06:57 +0200
Subject: [PATCH 179/295] [kandinsky] Fonts: improve glyph %

---
 kandinsky/fonts/LargeSourcePixel.otf | Bin 211680 -> 211488 bytes
 kandinsky/fonts/SmallSourcePixel.otf | Bin 206008 -> 206120 bytes
 2 files changed, 0 insertions(+), 0 deletions(-)

diff --git a/kandinsky/fonts/LargeSourcePixel.otf b/kandinsky/fonts/LargeSourcePixel.otf
index af4a233736893110b786c13bae44017e82f8862d..1e6c616eaab8d8ca652dbc5d0784008b119ed06f 100644
GIT binary patch
delta 34292
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From b360639e4e15b19c35cef42978d58a0d0b6ec7e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 11:31:26 +0200
Subject: [PATCH 180/295] [apps/text_field_delegate_app] Fix XNT in a sum
 layout

It was broken by a blunder while swithching to UTF8
---
 apps/shared/text_field_delegate_app.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index d7b2d2582..720b6c0b1 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -57,7 +57,7 @@ bool TextFieldDelegateApp::fieldDidReceiveEvent(EditableField * field, Responder
     /* TODO decode here to encode again in handleEventWithText? */
     constexpr int bufferSize = CodePoint::MaxCodePointCharLength+1;
     char buffer[bufferSize];
-    size_t length = UTF8Decoder::CodePointToChars(XNT(), buffer, bufferSize);
+    size_t length = UTF8Decoder::CodePointToChars(field->XNTCodePoint(XNT()), buffer, bufferSize);
     assert(length < bufferSize - 1);
     buffer[length] = 0;
     return field->handleEventWithText(buffer);

From 352850e48172bc41de67b7fe87f158b329c1190b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 11 Apr 2019 09:54:26 +0200
Subject: [PATCH 181/295] [python] Fix typo

---
 python/port/mpconfigport.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/port/mpconfigport.h b/python/port/mpconfigport.h
index 681b3b6b5..207d3e6e6 100644
--- a/python/port/mpconfigport.h
+++ b/python/port/mpconfigport.h
@@ -83,7 +83,7 @@
 // Whether to provide "sys" module
 #define MICROPY_PY_SYS (0)
 
-// Wether to provide the "urandom" module
+// Whether to provide the "urandom" module
 #define MICROPY_PY_URANDOM (1)
 
 // Whether to include: randrange, randint, choice, random, uniform

From 447c2f63e1b5ff91f3c30b102afb3b187adf3a30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 11:43:53 +0200
Subject: [PATCH 182/295] [python/urandom] Add init method to seed the
 Yasmarang generator.

This commit should disappear as it will be in one of the next stable
micropython versions
---
 python/src/extmod/modurandom.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/python/src/extmod/modurandom.c b/python/src/extmod/modurandom.c
index 1512a3fd4..a8d087c49 100644
--- a/python/src/extmod/modurandom.c
+++ b/python/src/extmod/modurandom.c
@@ -200,8 +200,20 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_urandom_uniform_obj, mod_urandom_uniform);
 
 #endif // MICROPY_PY_URANDOM_EXTRA_FUNCS
 
+
+#ifdef MICROPY_PY_URANDOM_SEED_INIT_FUNC
+STATIC mp_obj_t mod_urandom___init__() {
+    mod_urandom_seed(MP_OBJ_NEW_SMALL_INT(MICROPY_PY_URANDOM_SEED_INIT_FUNC));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_urandom___init___obj, mod_urandom___init__);
+#endif
+
 STATIC const mp_rom_map_elem_t mp_module_urandom_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_urandom) },
+    #ifdef MICROPY_PY_URANDOM_SEED_INIT_FUNC
+    { MP_ROM_QSTR(MP_QSTR___init__), MP_ROM_PTR(&mod_urandom___init___obj) },
+    #endif
     { MP_ROM_QSTR(MP_QSTR_getrandbits), MP_ROM_PTR(&mod_urandom_getrandbits_obj) },
     { MP_ROM_QSTR(MP_QSTR_seed), MP_ROM_PTR(&mod_urandom_seed_obj) },
     #if MICROPY_PY_URANDOM_EXTRA_FUNCS

From 3a390111d80b7094542f015e7c237a99ce93afca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 11:44:57 +0200
Subject: [PATCH 183/295] [python/urandom] Use Ion::random to seed urandom

---
 python/port/helpers.cpp    | 4 ++++
 python/port/helpers.h      | 1 +
 python/port/mpconfigport.h | 3 +++
 3 files changed, 8 insertions(+)

diff --git a/python/port/helpers.cpp b/python/port/helpers.cpp
index b30cc00b5..5f772751f 100644
--- a/python/port/helpers.cpp
+++ b/python/port/helpers.cpp
@@ -42,3 +42,7 @@ bool micropython_port_interrupt_if_needed() {
   }
   return false;
 }
+
+int micropython_port_random() {
+  return Ion::random();
+}
diff --git a/python/port/helpers.h b/python/port/helpers.h
index 32215ff80..761f96a7d 100644
--- a/python/port/helpers.h
+++ b/python/port/helpers.h
@@ -12,6 +12,7 @@ extern "C" {
 bool micropython_port_vm_hook_loop();
 bool micropython_port_interruptible_msleep(uint32_t delay);
 bool micropython_port_interrupt_if_needed();
+int micropython_port_random();
 
 #ifdef __cplusplus
 }
diff --git a/python/port/mpconfigport.h b/python/port/mpconfigport.h
index 207d3e6e6..dae99b6f2 100644
--- a/python/port/mpconfigport.h
+++ b/python/port/mpconfigport.h
@@ -89,6 +89,9 @@
 // Whether to include: randrange, randint, choice, random, uniform
 #define MICROPY_PY_URANDOM_EXTRA_FUNCS (1)
 
+// Function to seed URANDOM with on init
+#define MICROPY_PY_URANDOM_SEED_INIT_FUNC micropython_port_random()
+
 // Make a pointer to RAM callable (eg set lower bit for Thumb code)
 // (This scheme won't work if we want to mix Thumb and normal ARM code.)
 #define MICROPY_MAKE_POINTER_CALLABLE(p) (p)

From a8e7208a304eaf96c515794b0e8478b76e40acf7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 12:10:47 +0200
Subject: [PATCH 184/295] [apps/calculation/tests] Tests on displayExactApprox
 for random/round

---
 apps/calculation/test/calculation_store.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index 86cf0167c..cf251d910 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -104,6 +104,8 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
   assertCalculationDisplay("3+x→f(x)", ::Calculation::Calculation::DisplayOutput::ExactOnly, ::Calculation::Calculation::EqualSign::Unknown, "x+3", nullptr, &globalContext, &store);
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
+  assertCalculationDisplay("1+1+random()", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
+  assertCalculationDisplay("1+1+round(1.343,2)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3.34", &globalContext, &store);
 }
 
 QUIZ_CASE(calculation_symbolic_computation) {

From 8ea5f1b642c3382ebadbefe3c84dc3dd8bf9fab8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 12:11:37 +0200
Subject: [PATCH 185/295] [apps/calc] If result contains random/round, display
 approximation only

---
 apps/calculation/calculation.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 2a498d278..efa8823d8 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -159,7 +159,15 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
     return DisplayOutput::ExactOnly;
   }
   bool approximateOnly = false;
-  if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
+  if (exactOutput().recursivelyMatches([](const Expression e, Context & c, bool replaceSymbols) {
+        /* If the exact result contains one of the following types, do not
+         * display it. */
+        ExpressionNode::Type t = e.type();
+        return (t == ExpressionNode::Type::Random) || (t == ExpressionNode::Type::Round);},
+        *context, true))
+  {
+    approximateOnly = true;
+  } else if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal
      * because of the number of significant digits, we display both. */

From 1ecfb4af8396a41e77ca2d9ce35a49e6b35b6789 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 14:15:31 +0200
Subject: [PATCH 186/295] [poincare/tests] randint's simplification gives its
 approximation

---
 apps/calculation/test/calculation_store.cpp | 2 ++
 poincare/test/complex.cpp                   | 2 +-
 poincare/test/random.cpp                    | 9 +--------
 3 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index cf251d910..d132110ea 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -106,6 +106,8 @@ QUIZ_CASE(calculation_display_exact_approximate) {
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
   assertCalculationDisplay("1+1+random()", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, nullptr, &globalContext, &store);
   assertCalculationDisplay("1+1+round(1.343,2)", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, nullptr, "3.34", &globalContext, &store);
+  assertCalculationDisplay("randint(2,2)+3", ::Calculation::Calculation::DisplayOutput::ApproximateOnly, ::Calculation::Calculation::EqualSign::Unknown, "5", "5", &globalContext, &store);
+
 }
 
 QUIZ_CASE(calculation_symbolic_computation) {
diff --git a/poincare/test/complex.cpp b/poincare/test/complex.cpp
index e74e0e3ac..9ae0a374c 100644
--- a/poincare/test/complex.cpp
+++ b/poincare/test/complex.cpp
@@ -104,7 +104,7 @@ QUIZ_CASE(poincare_complex_simplify) {
   assert_parsed_expression_simplify_to("permute(10, 4)", "5040", User, Radian, Cartesian);
   // TODO: prediction is not simplified yet
   //assert_parsed_expression_simplify_to("prediction(-2,-3)", "prediction(-2)", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("randint(2,4)", "randint(2,4)", User, Radian, Cartesian);
+  assert_parsed_expression_simplify_to("randint(2,2)", "2", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("random()", "random()", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("re(x)", "re(x)", User, Radian, Cartesian);
   assert_parsed_expression_simplify_to("round(x,y)", "round(x,y)", User, Radian, Cartesian);
diff --git a/poincare/test/random.cpp b/poincare/test/random.cpp
index 6a40f8bd8..52f892140 100644
--- a/poincare/test/random.cpp
+++ b/poincare/test/random.cpp
@@ -20,12 +20,5 @@ QUIZ_CASE(poincare_random_simplify) {
 }
 
 QUIZ_CASE(poincare_randint_simplify) {
-  assert_parsed_expression_simplify_to("1/randint(3,10)+1/3+1/4", "1/randint(3,10)+7/12");
-  assert_parsed_expression_simplify_to("randint(3,10)+randint(3,10)", "randint(3,10)+randint(3,10)");
-  assert_parsed_expression_simplify_to("randint(3,10)-randint(3,10)", "-randint(3,10)+randint(3,10)");
-  assert_parsed_expression_simplify_to("1/randint(3,10)+1/3+1/4+1/randint(3,10)", "1/randint(3,10)+1/randint(3,10)+7/12");
-  assert_parsed_expression_simplify_to("randint(3,10)×randint(3,10)", "randint(3,10)×randint(3,10)");
-  assert_parsed_expression_simplify_to("randint(3,10)/randint(3,10)", "randint(3,10)/randint(3,10)");
-  assert_parsed_expression_simplify_to("3^randint(3,10)×3^randint(3,10)", "3^randint(3,10)×3^randint(3,10)");
-  assert_parsed_expression_simplify_to("randint(3,10)×ln(2)×3+randint(3,10)×ln(2)×5", "5×ln(2)×randint(3,10)+3×ln(2)×randint(3,10)");
+  assert_parsed_expression_simplify_to("1/randint(2,2)+1/2", "1");
 }

From 939136d794063da4b3326990dd5ce0d38e925808 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 14:28:00 +0200
Subject: [PATCH 187/295] [poincre/randint] Randit simplifies itself to its
 approximation

---
 poincare/include/poincare/expression.h |  1 +
 poincare/include/poincare/randint.h    |  4 ++++
 poincare/src/randint.cpp               | 29 ++++++++++++++++++++++++--
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index 5f0198e8f..f889f4cc7 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -71,6 +71,7 @@ class Expression : public TreeHandle {
   friend class PowerNode;
   friend class PredictionInterval;
   friend class Product;
+  friend class Randint;
   friend class RealPart;
   friend class Round;
   friend class SignFunction;
diff --git a/poincare/include/poincare/randint.h b/poincare/include/poincare/randint.h
index ef2004b60..ace041666 100644
--- a/poincare/include/poincare/randint.h
+++ b/poincare/include/poincare/randint.h
@@ -36,6 +36,8 @@ private:
     return templateApproximate<double>(context, complexFormat, angleUnit);
   }
   template <typename T> Evaluation<T> templateApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
+  // Simplification
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) override;
 };
 
 class Randint final : public Expression {
@@ -44,6 +46,8 @@ public:
   Randint(const RandintNode * n) : Expression(n) {}
   static Randint Builder(Expression child0, Expression child1) { return TreeHandle::FixedArityBuilder<Randint, RandintNode>(ArrayBuilder<TreeHandle>(child0, child1).array(), 2); }
   static constexpr Expression::FunctionHelper s_functionHelper = Expression::FunctionHelper("randint", 2, &UntypedBuilderTwoChildren<Randint>);
+private:
+  Expression shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target);
 };
 
 }
diff --git a/poincare/src/randint.cpp b/poincare/src/randint.cpp
index 47d20058b..e30b2b3df 100644
--- a/poincare/src/randint.cpp
+++ b/poincare/src/randint.cpp
@@ -1,9 +1,13 @@
 #include <poincare/randint.h>
 #include <poincare/complex.h>
-#include <poincare/random.h>
-#include <ion.h>
+#include <poincare/infinity.h>
+#include <poincare/integer.h>
 #include <poincare/layout_helper.h>
+#include <poincare/random.h>
+#include <poincare/rational.h>
+#include <poincare/undefined.h>
 #include <poincare/serialization_helper.h>
+#include <ion.h>
 
 extern "C" {
 #include <assert.h>
@@ -37,5 +41,26 @@ template <typename T> Evaluation<T> RandintNode::templateApproximate(Context & c
   return Complex<T>::Builder(result);
 }
 
+Expression RandintNode::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ReductionTarget target, bool symbolicComputation) {
+  return Randint(this).shallowReduce(context, complexFormat, angleUnit, target);
+}
+
+Expression Randint::shallowReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target) {
+  Expression e = Expression::defaultShallowReduce();
+  if (e.isUndefined()) {
+    return e;
+  }
+  float eval = approximateToScalar<float>(context, complexFormat, angleUnit);
+  Expression result;
+  if (std::isnan(eval)) {
+    result = Undefined::Builder();
+  } else if (std::isinf(eval)) {
+    result = Infinity::Builder(eval < 0);
+  } else {
+    result = Rational::Builder(Integer((int)eval));
+  }
+  replaceWithInPlace(result);
+  return result;
+}
 
 }

From 7afeb6e3efe1fa9583cb7e836f5467c439280f31 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 14:33:52 +0200
Subject: [PATCH 188/295] [poincare/randint] Do not accept infinite bounds

Before, randint(1,inf) would give inf
---
 poincare/src/randint.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/randint.cpp b/poincare/src/randint.cpp
index e30b2b3df..eee3afb1f 100644
--- a/poincare/src/randint.cpp
+++ b/poincare/src/randint.cpp
@@ -33,7 +33,7 @@ template <typename T> Evaluation<T> RandintNode::templateApproximate(Context & c
   Evaluation<T> bInput = childAtIndex(1)->approximate(T(), context, complexFormat, angleUnit);
   T a = aInput.toScalar();
   T b = bInput.toScalar();
-  if (std::isnan(a) || std::isnan(b) || a != std::round(a) || b != std::round(b) || a > b) {
+  if (std::isnan(a) || std::isnan(b) || a != std::round(a) || b != std::round(b) || a > b || std::isinf(a) || std::isinf(b)) {
     return Complex<T>::Undefined();
 
   }

From 530fbfed568cdd475bb7d166bc7957fd442a1524 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Wed, 17 Apr 2019 14:35:46 +0200
Subject: [PATCH 189/295] [poincare/tests] More tests on randint

---
 poincare/test/random.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/poincare/test/random.cpp b/poincare/test/random.cpp
index 52f892140..b8dd06c3a 100644
--- a/poincare/test/random.cpp
+++ b/poincare/test/random.cpp
@@ -21,4 +21,7 @@ QUIZ_CASE(poincare_random_simplify) {
 
 QUIZ_CASE(poincare_randint_simplify) {
   assert_parsed_expression_simplify_to("1/randint(2,2)+1/2", "1");
+  assert_parsed_expression_simplify_to("randint(1, inf)", "undef");
+  assert_parsed_expression_simplify_to("randint(-inf, 3)", "undef");
+  assert_parsed_expression_simplify_to("randint(4, 3)", "undef");
 }

From 7b7cc0bb2f12baa862e8b102ec76df61b3eb1e35 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 13:57:43 +0200
Subject: [PATCH 190/295] [apps] BatteryView: when the battery is EMPTY and the
 device hasn't shut down yet, avoid drawing full battery (and breaking
 assertion)

---
 apps/battery_view.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/battery_view.cpp b/apps/battery_view.cpp
index dbbdd9e34..81b90e126 100644
--- a/apps/battery_view.cpp
+++ b/apps/battery_view.cpp
@@ -66,7 +66,7 @@ void BatteryView::drawRect(KDContext * ctx, KDRect rect) const {
     ctx->fillRect(KDRect(batteryInsideX, 0, batteryInsideWidth, k_batteryHeight), Palette::YellowLight);
     KDRect frame((k_batteryWidth-k_flashWidth)/2, 0, k_flashWidth, k_flashHeight);
     ctx->blendRectWithMask(frame, KDColorWhite, (const uint8_t *)flashMask, s_flashWorkingBuffer);
-  } else if (m_chargeState == Ion::Battery::Charge::LOW) {
+  } else if (m_chargeState == Ion::Battery::Charge::EMPTY || m_chargeState == Ion::Battery::Charge::LOW) {
     assert(!m_isPlugged);
     // Low: Quite empty battery
     ctx->fillRect(KDRect(batteryInsideX, 0, 2*k_elementWidth, k_batteryHeight), Palette::LowBattery);

From b8522f1ef0fd0f3d370c1c94a920945b1fcafb05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 13:58:42 +0200
Subject: [PATCH 191/295] [apps] AppsContainer: 'shutdownDueToLowBattery' can
 be call when the battery is actually LOW (due to some oscillations between
 LOW and EMPTY). Handle that case

---
 apps/apps_container.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/apps/apps_container.cpp b/apps/apps_container.cpp
index c79eac063..6e7cef01d 100644
--- a/apps/apps_container.cpp
+++ b/apps/apps_container.cpp
@@ -312,6 +312,14 @@ void AppsContainer::displayExamModePopUp(bool activate) {
 }
 
 void AppsContainer::shutdownDueToLowBattery() {
+  if (Ion::Battery::level() != Ion::Battery::Charge::EMPTY) {
+  /* We early escape here. When the battery switches from LOW to EMPTY, it
+   * oscillates a few times before stabilizing to EMPTY. So we might call
+   * 'shutdownDueToLowBattery' but the battery level still answers LOW instead
+   * of EMPTY. We want to avoid uselessly redrawing the whole window in that
+   * case. */
+    return;
+  }
   while (Ion::Battery::level() == Ion::Battery::Charge::EMPTY) {
     Ion::Backlight::setBrightness(0);
     m_emptyBatteryWindow.redraw(true);

From 201900060163ea5a73194d16eb22998f1f670f25 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 28 Mar 2019 13:50:18 +0100
Subject: [PATCH 192/295] [apps/graph] Add preimage to i18n

---
 apps/graph/base.de.i18n | 2 ++
 apps/graph/base.en.i18n | 2 ++
 apps/graph/base.es.i18n | 2 ++
 apps/graph/base.fr.i18n | 2 ++
 apps/graph/base.pt.i18n | 2 ++
 5 files changed, 10 insertions(+)

diff --git a/apps/graph/base.de.i18n b/apps/graph/base.de.i18n
index ed06c9cbc..e5ec488fa 100644
--- a/apps/graph/base.de.i18n
+++ b/apps/graph/base.de.i18n
@@ -11,12 +11,14 @@ Compute = "Berechnen"
 Zeros = "Nullstellen"
 Tangent = "Tangente"
 Intersection = "Schnittmenge"
+Preimage = "Urbild"
 SelectLowerBound = "Untere Integrationsgrenze"
 SelectUpperBound = "Obere Integrationsgrenze"
 NoMaximumFound = "Kein Maximalwert gefunden"
 NoMinimumFound = "Kein Mindestwert gefunden"
 NoZeroFound = "Keine Nullstelle gefunden"
 NoIntersectionFound = "Kein Schnittpunkt gefunden"
+NoPreimageFound = "Kein Urbild gefunden"
 DerivativeFunctionColumn = "Spalte der Ableitungsfunktion"
 HideDerivativeColumn = "Ableitungsfunktion ausblenden"
 AllowedCharactersAZaz09 = "Erlaubte Zeichen: A-Z, a-z, 0-9, _"
diff --git a/apps/graph/base.en.i18n b/apps/graph/base.en.i18n
index 34847cd07..18142b32a 100644
--- a/apps/graph/base.en.i18n
+++ b/apps/graph/base.en.i18n
@@ -11,12 +11,14 @@ Compute = "Calculate"
 Zeros = "Zeros"
 Tangent = "Tangent"
 Intersection = "Intersection"
+Preimage = "Inverse image"
 SelectLowerBound = "Select lower bound"
 SelectUpperBound = "Select upper bound"
 NoMaximumFound = "No maximum found"
 NoMinimumFound = "No minimum found"
 NoZeroFound = "No zero found"
 NoIntersectionFound = "No intersection found"
+NoPreimageFound = "No inverse image found"
 DerivativeFunctionColumn = "Derivative function column"
 HideDerivativeColumn = "Hide the derivative function"
 AllowedCharactersAZaz09 = "Allowed characters: A-Z, a-z, 0-9, _"
diff --git a/apps/graph/base.es.i18n b/apps/graph/base.es.i18n
index 3d095ec4d..fbb763c64 100644
--- a/apps/graph/base.es.i18n
+++ b/apps/graph/base.es.i18n
@@ -11,12 +11,14 @@ Compute = "Calcular"
 Zeros = "Raíces"
 Tangent = "Tangente"
 Intersection = "Intersección"
+Preimage = "Imagen inversa"
 SelectLowerBound = "Seleccionar el límite inferior"
 SelectUpperBound = "Seleccionar el límite superior"
 NoMaximumFound = "Níngun máximo encontrado"
 NoMinimumFound = "Níngun mínimo encontrado"
 NoZeroFound = "Ninguna raíz encontrada"
 NoIntersectionFound = "Ninguna intersección encontrada"
+NoPreimageFound = "Ninguna imagen inversa encontrada"
 DerivativeFunctionColumn = "Columna de la derivada"
 HideDerivativeColumn = "Ocultar la derivada"
 AllowedCharactersAZaz09 = "Caracteres permitidos : A-Z, a-z, 0-9, _"
diff --git a/apps/graph/base.fr.i18n b/apps/graph/base.fr.i18n
index 6dd75e4ea..5014969aa 100644
--- a/apps/graph/base.fr.i18n
+++ b/apps/graph/base.fr.i18n
@@ -11,12 +11,14 @@ Compute = "Calculer"
 Zeros = "Zéros"
 Tangent = "Tangente"
 Intersection = "Intersection"
+Preimage = "Antécédent"
 SelectLowerBound = "Selectionner la borne inférieure"
 SelectUpperBound = "Selectionner la borne supérieure"
 NoMaximumFound = "Aucun maximum trouvé"
 NoMinimumFound = "Aucun minimum trouvé"
 NoZeroFound = "Aucun zéro trouvé"
 NoIntersectionFound = "Aucune intersection trouvée"
+NoPreimageFound = "Aucun antécédent trouvé"
 DerivativeFunctionColumn = "Colonne de la fonction derivée"
 HideDerivativeColumn = "Masquer la fonction derivée"
 AllowedCharactersAZaz09 = "Caractères autorisés : A-Z, a-z, 0-9, _"
diff --git a/apps/graph/base.pt.i18n b/apps/graph/base.pt.i18n
index eed09f293..1e33f5c91 100644
--- a/apps/graph/base.pt.i18n
+++ b/apps/graph/base.pt.i18n
@@ -11,12 +11,14 @@ Compute = "Calcular"
 Zeros = "Raízes"
 Tangent = "Tangente"
 Intersection = "Intersecção"
+Preimage = "Imagem inversa"
 SelectLowerBound = "Selecionar limite superior"
 SelectUpperBound = "Selecionar limite inferior"
 NoMaximumFound = "Nenhum máximo encontrado"
 NoMinimumFound = "Nenhum mínimo encontrado"
 NoZeroFound = "Nenhuma raiz encontrada"
 NoIntersectionFound = "Nenhuma intersecção encontrada"
+NoPreimageFound = "Nenhuma imagem inversa encontrada"
 DerivativeFunctionColumn = "Coluna da função derivada"
 HideDerivativeColumn = "Esconder função derivada"
 AllowedCharactersAZaz09 =  "Caracteres permitidos : A-Z, a-z, 0-9, _"

From 439474b23b0f0bb034d65702aa603bf0056a09e3 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 2 Apr 2019 11:31:35 +0200
Subject: [PATCH 193/295] [apps/graph/graph] Define PreimageGraphController
 class

---
 apps/graph/Makefile                           |  1 +
 .../graph/graph/preimage_graph_controller.cpp | 29 +++++++++++++++++++
 apps/graph/graph/preimage_graph_controller.h  | 22 ++++++++++++++
 3 files changed, 52 insertions(+)
 create mode 100644 apps/graph/graph/preimage_graph_controller.cpp
 create mode 100644 apps/graph/graph/preimage_graph_controller.h

diff --git a/apps/graph/Makefile b/apps/graph/Makefile
index 5f8ea6f7e..9d5696b8e 100644
--- a/apps/graph/Makefile
+++ b/apps/graph/Makefile
@@ -12,6 +12,7 @@ app_src += $(addprefix apps/graph/,\
   graph/graph_controller.cpp \
   graph/graph_controller_helper.cpp \
   graph/graph_view.cpp \
+  graph/preimage_graph_controller.cpp\
   graph/integral_graph_controller.cpp \
   graph/intersection_graph_controller.cpp \
   graph/root_graph_controller.cpp \
diff --git a/apps/graph/graph/preimage_graph_controller.cpp b/apps/graph/graph/preimage_graph_controller.cpp
new file mode 100644
index 000000000..818de7210
--- /dev/null
+++ b/apps/graph/graph/preimage_graph_controller.cpp
@@ -0,0 +1,29 @@
+#include "preimage_graph_controller.h"
+
+namespace Graph {
+
+PreimageGraphController::PreimageGraphController(
+  Responder * parentResponder,
+  GraphView * graphView,
+  BannerView * bannerView,
+  Shared::InteractiveCurveViewRange * curveViewRange,
+  Shared::CurveViewCursor * cursor
+) :
+  CalculationGraphController(
+    parentResponder,
+    graphView,
+    bannerView,
+    curveViewRange,
+    cursor,
+    I18n::Message::NoPreimageFound
+  ),
+  m_image(NAN)
+{
+}
+
+Poincare::Expression::Coordinate2D PreimageGraphController::computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) {
+  Poincare::Expression expression = Poincare::Float<double>::Builder(m_image);
+  return functionStore()->modelForRecord(m_record)->nextIntersectionFrom(start, step, max, context, expression);
+}
+
+}
diff --git a/apps/graph/graph/preimage_graph_controller.h b/apps/graph/graph/preimage_graph_controller.h
new file mode 100644
index 000000000..995b06b0a
--- /dev/null
+++ b/apps/graph/graph/preimage_graph_controller.h
@@ -0,0 +1,22 @@
+#include "calculation_graph_controller.h"
+
+namespace Graph {
+
+class PreimageGraphController : public CalculationGraphController {
+public:
+  PreimageGraphController(
+    Responder * parentResponder,
+    GraphView * graphView,
+    BannerView * bannerView,
+    Shared::InteractiveCurveViewRange * curveViewRange,
+    Shared::CurveViewCursor * cursor
+  );
+  const char * title() override { return I18n::translate(I18n::Message::Preimage); }
+  double image() { return m_image; }
+  void setImage(double value) { m_image = value; }
+private:
+  Poincare::Expression::Coordinate2D computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) override;
+  double m_image;
+};
+
+}

From 938c7a1a45cafe54870e7e763a6a5498266131b6 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 2 Apr 2019 11:41:52 +0200
Subject: [PATCH 194/295] [apps/graph/graph] Define PreimageParameterController
 class

---
 apps/graph/Makefile                           |  1 +
 .../graph/preimage_parameter_controller.cpp   | 53 +++++++++++++++++++
 .../graph/preimage_parameter_controller.h     | 31 +++++++++++
 3 files changed, 85 insertions(+)
 create mode 100644 apps/graph/graph/preimage_parameter_controller.cpp
 create mode 100644 apps/graph/graph/preimage_parameter_controller.h

diff --git a/apps/graph/Makefile b/apps/graph/Makefile
index 9d5696b8e..b3b7ef5b0 100644
--- a/apps/graph/Makefile
+++ b/apps/graph/Makefile
@@ -13,6 +13,7 @@ app_src += $(addprefix apps/graph/,\
   graph/graph_controller_helper.cpp \
   graph/graph_view.cpp \
   graph/preimage_graph_controller.cpp\
+  graph/preimage_parameter_controller.cpp\
   graph/integral_graph_controller.cpp \
   graph/intersection_graph_controller.cpp \
   graph/root_graph_controller.cpp \
diff --git a/apps/graph/graph/preimage_parameter_controller.cpp b/apps/graph/graph/preimage_parameter_controller.cpp
new file mode 100644
index 000000000..89797dd0b
--- /dev/null
+++ b/apps/graph/graph/preimage_parameter_controller.cpp
@@ -0,0 +1,53 @@
+#include "preimage_parameter_controller.h"
+#include "../app.h"
+#include <assert.h>
+
+namespace Graph {
+
+PreimageParameterController::PreimageParameterController(
+  Responder * parentResponder,
+  InputEventHandlerDelegate * inputEventHandlerDelegate,
+  Shared::InteractiveCurveViewRange * graphRange,
+  Shared::CurveViewCursor * cursor,
+  PreimageGraphController * preimageGraphController
+) :
+  Shared::GoToParameterController(
+    parentResponder,
+    inputEventHandlerDelegate,
+    graphRange,
+    cursor,
+    I18n::Message::Y
+  ),
+  m_preimageGraphController(preimageGraphController)
+{
+}
+
+const char * PreimageParameterController::title() {
+  return I18n::translate(I18n::Message::Preimage);
+}
+
+void PreimageParameterController::viewWillAppear() {
+  m_preimageGraphController->setImage(m_cursor->y());
+  Shared::GoToParameterController::viewWillAppear();
+}
+
+void PreimageParameterController::buttonAction() {
+  m_preimageGraphController->setRecord(m_record);
+  StackViewController * stack = static_cast<StackViewController *>(parentResponder());
+  stack->pop();
+  stack->pop();
+  stack->pop();
+  stack->push(m_preimageGraphController);
+}
+
+double PreimageParameterController::parameterAtIndex(int index) {
+  assert(index == 0);
+  return m_preimageGraphController->image();
+}
+bool PreimageParameterController::setParameterAtIndex(int parameterIndex, double f) {
+  assert(parameterIndex == 0);
+  m_preimageGraphController->setImage(f);
+  return true;
+}
+
+}
diff --git a/apps/graph/graph/preimage_parameter_controller.h b/apps/graph/graph/preimage_parameter_controller.h
new file mode 100644
index 000000000..dbe683004
--- /dev/null
+++ b/apps/graph/graph/preimage_parameter_controller.h
@@ -0,0 +1,31 @@
+#ifndef GRAPH_PREIMAGE_PARAMETER_CONTROLLER
+#define GRAPH_PREIMAGE_PARAMETER_CONTROLLER
+
+#include "../../shared/go_to_parameter_controller.h"
+#include "preimage_graph_controller.h"
+
+namespace Graph {
+
+class PreimageParameterController : public Shared::GoToParameterController {
+public:
+  PreimageParameterController(
+    Responder * parentResponder,
+    InputEventHandlerDelegate * inputEventHandlerDelegate,
+    Shared::InteractiveCurveViewRange * graphRange,
+    Shared::CurveViewCursor * cursor,
+    PreimageGraphController * preimageGraphController
+  );
+  const char * title() override;
+  void setRecord(Ion::Storage::Record record) { m_record = record; }
+  void viewWillAppear() override;
+private:
+  void buttonAction() override;
+  double parameterAtIndex(int index) override;
+  bool setParameterAtIndex(int parameterIndex, double f) override;
+  Ion::Storage::Record m_record;
+  PreimageGraphController * m_preimageGraphController;
+};
+
+}
+
+#endif

From 682fa3f294ec248bc923bd20796c8e88344bfb03 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 2 Apr 2019 12:06:21 +0200
Subject: [PATCH 195/295] [apps/graph/graph] CalculationParameterController
 inherits from ListViewDataSource

instead of SimpleListViewDataSource
---
 .../graph/graph/calculation_parameter_controller.cpp | 12 ++++++++----
 apps/graph/graph/calculation_parameter_controller.h  |  9 +++++----
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/apps/graph/graph/calculation_parameter_controller.cpp b/apps/graph/graph/calculation_parameter_controller.cpp
index cd5bb5877..259a916f5 100644
--- a/apps/graph/graph/calculation_parameter_controller.cpp
+++ b/apps/graph/graph/calculation_parameter_controller.cpp
@@ -82,19 +82,23 @@ int CalculationParameterController::numberOfRows() {
   return k_totalNumberOfCells;
 };
 
+KDCoordinate CalculationParameterController::rowHeight(int j) {
+  return Metric::ParameterCellHeight;
+}
 
-HighlightCell * CalculationParameterController::reusableCell(int index) {
+HighlightCell * CalculationParameterController::reusableCell(int index, int type) {
   assert(index >= 0);
   assert(index < k_totalNumberOfCells);
   return &m_cells[index];
 }
 
-int CalculationParameterController::reusableCellCount() {
+int CalculationParameterController::reusableCellCount(int type) {
   return k_totalNumberOfCells;
 }
 
-KDCoordinate CalculationParameterController::cellHeight() {
-  return Metric::ParameterCellHeight;
+int CalculationParameterController::typeAtLocation(int i, int j) {
+  assert(i == 0);
+  return 0;
 }
 
 void CalculationParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
diff --git a/apps/graph/graph/calculation_parameter_controller.h b/apps/graph/graph/calculation_parameter_controller.h
index 77b1cac88..9e55126d7 100644
--- a/apps/graph/graph/calculation_parameter_controller.h
+++ b/apps/graph/graph/calculation_parameter_controller.h
@@ -14,7 +14,7 @@
 
 namespace Graph {
 
-class CalculationParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
+class CalculationParameterController : public ViewController, public ListViewDataSource, public SelectableTableViewDataSource {
 public:
   CalculationParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * range, Shared::CurveViewCursor * cursor);
   View * view() override;
@@ -22,9 +22,10 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
   void didBecomeFirstResponder() override;
   int numberOfRows() override;
-  KDCoordinate cellHeight() override;
-  HighlightCell * reusableCell(int index) override;
-  int reusableCellCount() override;
+  KDCoordinate rowHeight(int j) override;
+  HighlightCell * reusableCell(int index, int type) override;
+  int reusableCellCount(int type) override;
+  int typeAtLocation(int i, int j) override;
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
   void setRecord(Ion::Storage::Record record);
 private:

From 04675f1a5b242a628484fc2f61b52d131b7e8617 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 2 Apr 2019 12:14:19 +0200
Subject: [PATCH 196/295] [apps/graph/graph] Add Preimage controllers to
 CalculationParameterController

---
 .../calculation_parameter_controller.cpp      | 51 +++++++++++++------
 .../graph/calculation_parameter_controller.h  |  8 ++-
 2 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/apps/graph/graph/calculation_parameter_controller.cpp b/apps/graph/graph/calculation_parameter_controller.cpp
index 259a916f5..f7df007b4 100644
--- a/apps/graph/graph/calculation_parameter_controller.cpp
+++ b/apps/graph/graph/calculation_parameter_controller.cpp
@@ -9,8 +9,11 @@ namespace Graph {
 
 CalculationParameterController::CalculationParameterController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, GraphView * graphView, BannerView * bannerView, InteractiveCurveViewRange * range, CurveViewCursor * cursor) :
   ViewController(parentResponder),
+  m_preimageCell(I18n::Message::Preimage),
   m_selectableTableView(this),
   m_record(),
+  m_preimageParameterController(nullptr, inputEventHandlerDelegate, range, cursor, &m_preimageGraphController),
+  m_preimageGraphController(nullptr, graphView, bannerView, range, cursor),
   m_tangentGraphController(nullptr, graphView, bannerView, range, cursor),
   m_integralGraphController(nullptr, inputEventHandlerDelegate, graphView, range, cursor),
   m_minimumGraphController(nullptr, graphView, bannerView, range, cursor),
@@ -34,30 +37,35 @@ void CalculationParameterController::didBecomeFirstResponder() {
 }
 
 bool CalculationParameterController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
+  int row = selectedRow();
+  if (event == Ion::Events::OK || event == Ion::Events::EXE || (event == Ion::Events::Right && row == 0)) {
     ViewController * controller = nullptr;
-    switch(selectedRow()) {
+    switch(row) {
       case 0:
+        m_preimageParameterController.setRecord(m_record);
+        controller = &m_preimageParameterController;
+        break;
+      case 1:
         m_intersectionGraphController.setRecord(m_record);
         controller = &m_intersectionGraphController;
         break;
-      case 1:
+      case 2:
         m_maximumGraphController.setRecord(m_record);
         controller = &m_maximumGraphController;
         break;
-      case 2:
+      case 3:
         m_minimumGraphController.setRecord(m_record);
         controller = &m_minimumGraphController;
         break;
-      case 3:
+      case 4:
         m_rootGraphController.setRecord(m_record);
         controller = &m_rootGraphController;
         break;
-      case 4:
+      case 5:
         m_tangentGraphController.setRecord(m_record);
         controller = &m_tangentGraphController;
         break;
-      case 5:
+      case 6:
         m_integralGraphController.setRecord(m_record);
         controller = &m_integralGraphController;
         break;
@@ -65,8 +73,10 @@ bool CalculationParameterController::handleEvent(Ion::Events::Event event) {
         return false;
     }
     StackViewController * stack = static_cast<StackViewController *>(parentResponder());
-    stack->pop();
-    stack->pop();
+    if (row > 0) {
+      stack->pop();
+      stack->pop();
+    }
     stack->push(controller);
     return true;
   }
@@ -79,6 +89,7 @@ bool CalculationParameterController::handleEvent(Ion::Events::Event event) {
 }
 
 int CalculationParameterController::numberOfRows() {
+  constexpr int k_totalNumberOfCells = k_totalNumberOfReusableCells + 1;
   return k_totalNumberOfCells;
 };
 
@@ -88,23 +99,31 @@ KDCoordinate CalculationParameterController::rowHeight(int j) {
 
 HighlightCell * CalculationParameterController::reusableCell(int index, int type) {
   assert(index >= 0);
-  assert(index < k_totalNumberOfCells);
-  return &m_cells[index];
+  assert(index < reusableCellCount(type));
+  if (type == 0) {
+    return &m_cells[index];
+  }
+  assert(type == 1);
+  return &m_preimageCell;
 }
 
 int CalculationParameterController::reusableCellCount(int type) {
-  return k_totalNumberOfCells;
+  if (type == 0) {
+    return k_totalNumberOfReusableCells;
+  }
+  return 1;
 }
 
 int CalculationParameterController::typeAtLocation(int i, int j) {
   assert(i == 0);
-  return 0;
+  return j == 0;
 }
 
 void CalculationParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
-  MessageTableCell * myCell = (MessageTableCell *)cell;
-  I18n::Message titles[k_totalNumberOfCells] = {I18n::Message::Intersection, I18n::Message::Maximum, I18n::Message::Minimum, I18n::Message::Zeros, I18n::Message::Tangent, I18n::Message::Integral};
-  myCell->setMessage(titles[index]);
+  if (cell != &m_preimageCell) {
+    I18n::Message titles[] = {I18n::Message::Intersection, I18n::Message::Maximum, I18n::Message::Minimum, I18n::Message::Zeros, I18n::Message::Tangent, I18n::Message::Integral};
+    static_cast<MessageTableCell *>(cell)->setMessage(titles[index - 1]);
+  }
 }
 
 void CalculationParameterController::setRecord(Ion::Storage::Record record) {
diff --git a/apps/graph/graph/calculation_parameter_controller.h b/apps/graph/graph/calculation_parameter_controller.h
index 9e55126d7..043f53a7b 100644
--- a/apps/graph/graph/calculation_parameter_controller.h
+++ b/apps/graph/graph/calculation_parameter_controller.h
@@ -3,6 +3,7 @@
 
 #include <escher.h>
 #include "../cartesian_function_store.h"
+#include "preimage_parameter_controller.h"
 #include "tangent_graph_controller.h"
 #include "extremum_graph_controller.h"
 #include "integral_graph_controller.h"
@@ -29,10 +30,13 @@ public:
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
   void setRecord(Ion::Storage::Record record);
 private:
-  constexpr static int k_totalNumberOfCells = 6;
-  MessageTableCell m_cells[k_totalNumberOfCells];
+  MessageTableCellWithChevron m_preimageCell;
+  constexpr static int k_totalNumberOfReusableCells = 6;
+  MessageTableCell m_cells[k_totalNumberOfReusableCells];
   SelectableTableView m_selectableTableView;
   Ion::Storage::Record m_record;
+  PreimageParameterController m_preimageParameterController;
+  PreimageGraphController m_preimageGraphController;
   TangentGraphController m_tangentGraphController;
   IntegralGraphController m_integralGraphController;
   MinimumGraphController m_minimumGraphController;

From 34001fc094c9c8585960b52a776d79d96018cd0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 15:10:11 +0200
Subject: [PATCH 197/295] [apps] BatteryView: avoid redrawing when battery
 picto switch from 'low' to 'empty' (the pictograms for low and empty are
 identical)

---
 apps/battery_view.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/apps/battery_view.cpp b/apps/battery_view.cpp
index 81b90e126..9e8b97e9c 100644
--- a/apps/battery_view.cpp
+++ b/apps/battery_view.cpp
@@ -22,6 +22,12 @@ const uint8_t tickMask[BatteryView::k_tickHeight][BatteryView::k_tickWidth] = {
 };
 
 bool BatteryView::setChargeState(Ion::Battery::Charge chargeState) {
+  /* There is no specific battery picto for 'empty' battery as the whole device
+   * shut down. Still, there might be a redrawing of the window before shutting
+   * down so we handle this case as the 'low' battery one. Plus, we avoid
+   * trigerring a redrawing by not marking anything as dirty when switching
+   * from 'low' to 'empty' battery. */
+  chargeState = chargeState == Ion::Battery::Charge::EMPTY ? Ion::Battery::Charge::LOW : chargeState;
   if (chargeState != m_chargeState) {
     m_chargeState = chargeState;
     markRectAsDirty(bounds());
@@ -52,6 +58,7 @@ KDColor s_flashWorkingBuffer[BatteryView::k_flashHeight*BatteryView::k_flashWidt
 KDColor s_tickWorkingBuffer[BatteryView::k_tickHeight*BatteryView::k_tickWidth];
 
 void BatteryView::drawRect(KDContext * ctx, KDRect rect) const {
+  assert(m_chargeState != Ion::Battery::Charge::EMPTY);
   /* We draw from left to right. The middle part representing the battery
    *'content' depends on the charge */
 
@@ -66,7 +73,7 @@ void BatteryView::drawRect(KDContext * ctx, KDRect rect) const {
     ctx->fillRect(KDRect(batteryInsideX, 0, batteryInsideWidth, k_batteryHeight), Palette::YellowLight);
     KDRect frame((k_batteryWidth-k_flashWidth)/2, 0, k_flashWidth, k_flashHeight);
     ctx->blendRectWithMask(frame, KDColorWhite, (const uint8_t *)flashMask, s_flashWorkingBuffer);
-  } else if (m_chargeState == Ion::Battery::Charge::EMPTY || m_chargeState == Ion::Battery::Charge::LOW) {
+  } else if (m_chargeState == Ion::Battery::Charge::LOW) {
     assert(!m_isPlugged);
     // Low: Quite empty battery
     ctx->fillRect(KDRect(batteryInsideX, 0, 2*k_elementWidth, k_batteryHeight), Palette::LowBattery);

From 20cd002e3ee35df57a5e5cae3fcb92f894938538 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 15:19:43 +0200
Subject: [PATCH 198/295] [graph] Fix build

---
 apps/graph/graph/preimage_graph_controller.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apps/graph/graph/preimage_graph_controller.h b/apps/graph/graph/preimage_graph_controller.h
index 995b06b0a..b9a553e6a 100644
--- a/apps/graph/graph/preimage_graph_controller.h
+++ b/apps/graph/graph/preimage_graph_controller.h
@@ -1,4 +1,5 @@
 #include "calculation_graph_controller.h"
+#include <apps/i18n.h>
 
 namespace Graph {
 

From 3ebb42bf9dd7c53b687f48819c9ab2618f75e104 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 15:43:54 +0200
Subject: [PATCH 199/295] [poincare] Fix Layout::replaceWithJuxtapositionOf
 (keep an empty layout if both children are empty)

---
 poincare/src/layout.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/src/layout.cpp b/poincare/src/layout.cpp
index 98641e9bd..1aef45379 100644
--- a/poincare/src/layout.cpp
+++ b/poincare/src/layout.cpp
@@ -99,7 +99,7 @@ void Layout::replaceWithJuxtapositionOf(Layout leftChild, Layout rightChild, Lay
      * replaceWith. */
     HorizontalLayout horizontalLayoutR = HorizontalLayout::Builder();
     p.replaceChild(*this, horizontalLayoutR, cursor);
-    horizontalLayoutR.addOrMergeChildAtIndex(leftChild, 0, true);
+    horizontalLayoutR.addOrMergeChildAtIndex(leftChild, 0, false);
     if (putCursorInTheMiddle) {
       if (!horizontalLayoutR.isEmpty()) {
         cursor->setLayout(horizontalLayoutR.childAtIndex(horizontalLayoutR.numberOfChildren()-1));

From a839c888834f3831b113b27470114e089eca4e11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 18 Apr 2019 16:11:15 +0200
Subject: [PATCH 200/295] [sequence] Fix isDefined

---
 apps/sequence/sequence.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 0f2a359d7..818d6c087 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -92,7 +92,7 @@ bool Sequence::isDefined() {
     case Type::SingleRecurrence:
       return data->initialConditionSize(0) > 0 && value().size > metaDataSize() + data->initialConditionSize(0);
     default:
-      return data->initialConditionSize(0) > 0 && data->initialConditionSize(0) > 0 && value().size > metaDataSize() + data->initialConditionSize(0) + data->initialConditionSize(1);
+      return data->initialConditionSize(0) > 0 && data->initialConditionSize(1) > 0 && value().size > metaDataSize() + data->initialConditionSize(0) + data->initialConditionSize(1);
   }
 }
 

From 7836288ac01865e37ed7c3e58fc7c1735e818cb2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 19 Apr 2019 17:56:26 +0200
Subject: [PATCH 201/295] [poincare] Power: fix infinite loop

Factorizing 1+(8+sqrt(6))^(1/2)^(-1) on the same denominator would lead
to an infinite loop in Real mode (because (8+sqrt(6))^(1/2)^(-1) is not
simplified to (8+sqrt(6))^(-1/2))
---
 poincare/src/power.cpp  | 34 ++++++++++++++++++++++++++--------
 poincare/test/power.cpp |  3 ++-
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index c1b5563d3..07c2c9753 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -572,10 +572,22 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
    * This rule is not generally true: ((-2)^2)^(1/2) != (-2)^(2*1/2) = -2
    * This rule is true if:
    * - a > 0
-   * - in Real: when b and c are integers
-   * - in other modes: when c is integer
-   * (Warning: in real mode only c integer is not enough:
-   * ex: ((-2)^(1/2))^2 = unreal != -2)
+   * - c is an integer
+   *
+   * Warning 1: in real mode only c integer is not enough:
+   * ex: ((-2)^(1/2))^2 = unreal != -2
+   * We escape that case by returning 'unreal' if the a^b is complex.
+   *
+   * Warning 2: If we did not apply this rule on expressions of the form
+   * (a^b)^(-1), we would end up in infinite loop when factorizing an addition
+   * on the same denominator.
+   * For ex:
+   * 1+[tan(2)^1/2]^(-1) --> (tan(2)^1/2+tan(2)^1/2*[tan(2)^1/2]^(-1))/tan(2)^1/2
+   *                     --> tan(2)+tan(2)*[tan(2)^1/2]^(-1)/tan(2)
+   *                     --> tan(2)^(3/2)+tan(2)^(3/2)*[tan(2)^1/2]^(-1)/tan(2)^3/2
+   *                     --> ...
+   * Indeed, we have to apply the rule (a^b)^c -> a^(b*c) as soon as c is an
+   * integer.
    */
   if (childAtIndex(0).type() == ExpressionNode::Type::Power) {
     Power p = childAtIndex(0).convert<Power>();
@@ -584,11 +596,17 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
     bool cInteger = (childAtIndex(1).type() == ExpressionNode::Type::Rational
           && childAtIndex(1).convert<Rational>().integerDenominator().isOne());
     if (aPositive || cInteger) {
-      // Check that the complex format is not Real or that b is an integer
-      bool bInteger = (p.childAtIndex(1).type() == ExpressionNode::Type::Rational && p.childAtIndex(1).convert<Rational>().integerDenominator().isOne());
-      if (aPositive || complexFormat != Preferences::ComplexFormat::Real || bInteger) {
-        return simplifyPowerPower(context, complexFormat, angleUnit, target);
+      /* If the complexFormat is real, we check that the inner power is defined
+       * before applying the rule (a^b)^c -> a^(b*c). Otherwise, we return
+       * 'unreal'. */
+      if (complexFormat == Preferences::ComplexFormat::Real) {
+        Expression approximation = p.approximate<float>(context, complexFormat, angleUnit);
+        if (approximation.type() == ExpressionNode::Type::Unreal) {
+          replaceWithInPlace(approximation);
+          return approximation;
+        }
       }
+      return simplifyPowerPower(context, complexFormat, angleUnit, target);
     }
   }
   // Step 11: (a*b*c*...)^r ?
diff --git a/poincare/test/power.cpp b/poincare/test/power.cpp
index d9d8692b0..bc54ba21e 100644
--- a/poincare/test/power.cpp
+++ b/poincare/test/power.cpp
@@ -106,5 +106,6 @@ QUIZ_CASE(poincare_power_simplify) {
   assert_parsed_expression_simplify_to("(-1)^(1/3)", "1/2+√(3)/2×𝐢");
   assert_parsed_expression_simplify_to("R(-x)", "R(-x)");
   assert_parsed_expression_simplify_to("√(x)^2", "x", User, Radian, Cartesian);
-  assert_parsed_expression_simplify_to("√(x)^2", "√(x)^2", User, Radian, Real);
+  assert_parsed_expression_simplify_to("√(-3)^2", "unreal", User, Radian, Real);
+  assert_parsed_expression_simplify_to("1+((8+√(6))^(1/2))^-1+(8+√(6))^(1/2)", "(√(√(6)+8)+√(6)+9)/√(√(6)+8)", User, Radian, Real);
 }

From 0e3d1992218b1aeed8638e499e0a98ee05e86344 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 19 Apr 2019 17:58:33 +0200
Subject: [PATCH 202/295] [poincare] Keep unused log function when building
 with POINCARE_TREE_LOG

---
 poincare/include/poincare/tree_pool.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poincare/include/poincare/tree_pool.h b/poincare/include/poincare/tree_pool.h
index 78c8a7342..a124964e3 100644
--- a/poincare/include/poincare/tree_pool.h
+++ b/poincare/include/poincare/tree_pool.h
@@ -44,7 +44,7 @@ public:
 #if POINCARE_TREE_LOG
   void flatLog(std::ostream & stream);
   void treeLog(std::ostream & stream);
-  void log() { treeLog(std::cout); }
+  __attribute__((__used__)) void log() { treeLog(std::cout); }
 #endif
   int numberOfNodes() const;
 

From 2d7c87d46137ffb0f67a4eddb5ad11a05cb5d4cf Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 5 Apr 2019 11:52:05 +0200
Subject: [PATCH 203/295] [apps/calculation] HistoryViewCell does not need to
 hold layouts

---
 apps/calculation/history_view_cell.cpp        | 24 +++++++------------
 apps/calculation/history_view_cell.h          |  3 ---
 .../scrollable_expression_view.cpp            |  4 ++++
 apps/calculation/scrollable_expression_view.h |  1 +
 4 files changed, 13 insertions(+), 19 deletions(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index fe0bba7a9..a95bbb476 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -27,9 +27,6 @@ void HistoryViewCellDataSource::setSelectedSubviewType(SubviewType subviewType,
 HistoryViewCell::HistoryViewCell(Responder * parentResponder) :
   Responder(parentResponder),
   m_calculation(),
-  m_inputLayout(),
-  m_leftOutputLayout(),
-  m_rightOutputLayout(),
   m_inputView(this),
   m_scrollableOutputView(this)
 {
@@ -64,7 +61,7 @@ void HistoryViewCell::setHighlighted(bool highlight) {
 Poincare::Layout HistoryViewCell::layout() const {
   assert(m_dataSource);
   if (m_dataSource->selectedSubviewType() == HistoryViewCellDataSource::SubviewType::Input) {
-    return m_inputLayout;
+    return m_inputView.layout();
   } else {
     return m_scrollableOutputView.layout();
   }
@@ -119,28 +116,23 @@ void HistoryViewCell::setCalculation(Calculation * calculation) {
     return;
   }
   m_calculation = *calculation;
-  m_inputLayout = calculation->createInputLayout();
-  m_inputView.setLayout(m_inputLayout);
+  m_inputView.setLayout(calculation->createInputLayout());
   App * calculationApp = (App *)app();
   /* Both output expressions have to be updated at the same time. Otherwise,
    * when updating one layout, if the second one still points to a deleted
    * layout, calling to layoutSubviews() would fail. */
-  if (!m_leftOutputLayout.isUninitialized()) {
-    m_leftOutputLayout = Poincare::Layout();
-  }
-  if (!m_rightOutputLayout.isUninitialized()) {
-    m_rightOutputLayout = Poincare::Layout();
-  }
+  Poincare::Layout leftOutputLayout = Poincare::Layout();
+  Poincare::Layout rightOutputLayout;
   Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
   if (display == Calculation::DisplayOutput::ExactOnly) {
-    m_rightOutputLayout = calculation->createExactOutputLayout();
+    rightOutputLayout = calculation->createExactOutputLayout();
   } else {
-    m_rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());
+    rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());
     if (display == Calculation::DisplayOutput::ExactAndApproximate) {
-      m_leftOutputLayout = calculation->createExactOutputLayout();
+      leftOutputLayout = calculation->createExactOutputLayout();
     }
   }
-  m_scrollableOutputView.setLayouts(m_rightOutputLayout, m_leftOutputLayout);
+  m_scrollableOutputView.setLayouts(rightOutputLayout, leftOutputLayout);
   I18n::Message equalMessage = calculation->exactAndApproximateDisplayedOutputsAreEqual(calculationApp->localContext()) == Calculation::EqualSign::Equal ? I18n::Message::Equal : I18n::Message::AlmostEqual;
   m_scrollableOutputView.setEqualMessage(equalMessage);
 }
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index 55053d6dc..90cdf0944 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -46,9 +46,6 @@ public:
 private:
   constexpr static KDCoordinate k_resultWidth = 80;
   Calculation m_calculation;
-  Poincare::Layout m_inputLayout;
-  Poincare::Layout m_leftOutputLayout;
-  Poincare::Layout m_rightOutputLayout;
   ScrollableExpressionView m_inputView;
   Shared::ScrollableExactApproximateExpressionsView m_scrollableOutputView;
   HistoryViewCellDataSource * m_dataSource;
diff --git a/apps/calculation/scrollable_expression_view.cpp b/apps/calculation/scrollable_expression_view.cpp
index 4860699ad..fae79f5d6 100644
--- a/apps/calculation/scrollable_expression_view.cpp
+++ b/apps/calculation/scrollable_expression_view.cpp
@@ -17,6 +17,10 @@ ScrollableExpressionView::ScrollableExpressionView(Responder * parentResponder)
   );
 }
 
+Poincare::Layout ScrollableExpressionView::layout() const {
+  return m_expressionView.layout();
+}
+
 void ScrollableExpressionView::setLayout(Layout layout) {
   m_expressionView.setLayout(layout);
 }
diff --git a/apps/calculation/scrollable_expression_view.h b/apps/calculation/scrollable_expression_view.h
index 15ce343bf..95fc67350 100644
--- a/apps/calculation/scrollable_expression_view.h
+++ b/apps/calculation/scrollable_expression_view.h
@@ -8,6 +8,7 @@ namespace Calculation {
 class ScrollableExpressionView : public ScrollableView, public ScrollViewDataSource {
 public:
   ScrollableExpressionView(Responder * parentResponder);
+  Poincare::Layout layout() const;
   void setLayout(Poincare::Layout layout);
   void setBackgroundColor(KDColor backgroundColor) override;
   void setExpressionBackgroundColor(KDColor backgroundColor);

From a3fe99da21cf5785399c0055cb9b4f4ddfbefa3a Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 9 Apr 2019 14:36:18 +0200
Subject: [PATCH 204/295] [escher] Simplify TableView::scrollToCell

---
 escher/include/escher/table_view.h | 5 +----
 escher/src/table_view.cpp          | 6 +-----
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/escher/include/escher/table_view.h b/escher/include/escher/table_view.h
index ca2db0d32..5c16a8c30 100644
--- a/escher/include/escher/table_view.h
+++ b/escher/include/escher/table_view.h
@@ -34,7 +34,6 @@ protected:
     void setHorizontalCellOverlap(KDCoordinate o) { m_horizontalCellOverlap = o; }
     void setVerticalCellOverlap(KDCoordinate o) { m_verticalCellOverlap = o; }
 
-    void scrollToCell(int i, int j) const;
     void reloadCellAtLocation(int i, int j);
     HighlightCell * cellAtLocation(int i, int j);
     TableViewDataSource * dataSource();
@@ -42,6 +41,7 @@ protected:
     int columnsScrollingOffset() const;
     int numberOfDisplayableRows() const;
     int numberOfDisplayableColumns() const;
+    KDRect cellFrame(int i, int j) const;
     void layoutSubviews() override;
   protected:
 #if ESCHER_VIEW_LOGGING
@@ -54,9 +54,6 @@ protected:
     int numberOfSubviews() const override;
     View * subviewAtIndex(int index) override;
 
-    /* realCellWidth enables to handle list view for which
-     * TableViewDataSource->cellWidht = 0 */
-    KDRect cellFrame(int i, int j) const;
     /* These two methods transform an index (of subview for instance) into
      * coordinates that refer to the data source entire table */
     int absoluteColumnNumberFromSubviewIndex(int index) const;
diff --git a/escher/src/table_view.cpp b/escher/src/table_view.cpp
index ed0ae9c7c..79345f8f5 100644
--- a/escher/src/table_view.cpp
+++ b/escher/src/table_view.cpp
@@ -20,7 +20,7 @@ TableViewDataSource * TableView::dataSource() {
 // This method computes the minimal scrolling needed to properly display the
 // requested cell.
 void TableView::scrollToCell(int i, int j) {
-  m_contentView.scrollToCell(i, j);
+  scrollToContentRect(m_contentView.cellFrame(i, j), true);
 }
 
 HighlightCell * TableView::cellAtLocation(int i, int j) {
@@ -96,10 +96,6 @@ KDCoordinate TableView::ContentView::width() const {
   return result ? result : m_tableView->maxContentWidthDisplayableWithoutScrolling();
 }
 
-void TableView::ContentView::scrollToCell(int x, int y) const {
-  m_tableView->scrollToContentRect(cellFrame(x, y), true);
-}
-
 void TableView::ContentView::reloadCellAtLocation(int i, int j) {
   HighlightCell * cell = cellAtLocation(i, j);
   if (cell) {

From 1081127c9729c607a3e46913522a806581ea9ed2 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 11 Apr 2019 15:39:19 +0200
Subject: [PATCH 205/295] [apps/calculation] Simplify
 HistoryViewCell::handleEvent

---
 apps/calculation/history_view_cell.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index a95bbb476..de27689ed 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -153,9 +153,8 @@ bool HistoryViewCell::handleEvent(Ion::Events::Event event) {
     HistoryViewCellDataSource::SubviewType otherSubviewType = m_dataSource->selectedSubviewType() == HistoryViewCellDataSource::SubviewType::Input ? HistoryViewCellDataSource::SubviewType::Output : HistoryViewCellDataSource::SubviewType::Input;
     CalculationSelectableTableView * tableView = (CalculationSelectableTableView *)parentResponder();
     tableView->scrollToSubviewOfTypeOfCellAtLocation(otherSubviewType, tableView->selectedColumn(), tableView->selectedRow());
-    HistoryViewCell * selectedCell = (HistoryViewCell *)(tableView->selectedCell());
-    m_dataSource->setSelectedSubviewType(otherSubviewType, selectedCell);
-    app()->setFirstResponder(selectedCell);
+    m_dataSource->setSelectedSubviewType(otherSubviewType, this);
+    app()->setFirstResponder(this);
     return true;
   }
   return false;

From 50ad6b67615b3056acd326b98a60ac4c461bf402 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 22 Apr 2019 11:07:56 +0200
Subject: [PATCH 206/295] [escher] SelectableTableViewDataSource: avoid calling
 m_delegate->tableViewDidChangeSelection when only reloading the data.

---
 escher/include/escher/selectable_table_view.h |  4 ++--
 escher/src/selectable_table_view.cpp          | 12 ++++++------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/escher/include/escher/selectable_table_view.h b/escher/include/escher/selectable_table_view.h
index bc58044ec..6e1e7c000 100644
--- a/escher/include/escher/selectable_table_view.h
+++ b/escher/include/escher/selectable_table_view.h
@@ -29,8 +29,8 @@ public:
   virtual bool handleEvent(Ion::Events::Event event) override;
   virtual void didEnterResponderChain(Responder * previousFirstResponder) override;
   virtual void willExitResponderChain(Responder * nextFirstResponder) override;
-  void deselectTable();
-  bool selectCellAtLocation(int i, int j, bool setFirstResponder = true);
+  void deselectTable(bool notifySelectableDelegate = true);
+  bool selectCellAtLocation(int i, int j, bool setFirstResponder = true, bool notifySelectableDelegate = true);
   HighlightCell * selectedCell();
 protected:
   SelectableTableViewDataSource * m_selectionDataSource;
diff --git a/escher/src/selectable_table_view.cpp b/escher/src/selectable_table_view.cpp
index 7282164f9..995e7c3e7 100644
--- a/escher/src/selectable_table_view.cpp
+++ b/escher/src/selectable_table_view.cpp
@@ -37,7 +37,7 @@ void SelectableTableView::selectColumn(int i) {
 void SelectableTableView::reloadData(bool setFirstResponder) {
   int col = selectedColumn();
   int row = selectedRow();
-  deselectTable();
+  deselectTable(false);
   /* FIXME: The problem with calling deselectTable is that at this point in time
    * the datasource's model is very likely to have changed. Therefore it's
    * rather complicated to get a pointer to the currently selected cell (in
@@ -45,7 +45,7 @@ void SelectableTableView::reloadData(bool setFirstResponder) {
   /* As a workaround, datasources can reset the highlighted state in their
    * willDisplayCell callback. */
   TableView::layoutSubviews();
-  selectCellAtLocation(col, row, setFirstResponder);
+  selectCellAtLocation(col, row, setFirstResponder, false);
 }
 
 void SelectableTableView::didEnterResponderChain(Responder * previousFirstResponder) {
@@ -60,18 +60,18 @@ void SelectableTableView::willExitResponderChain(Responder * nextFirstResponder)
   unhighlightSelectedCell();
 }
 
-void SelectableTableView::deselectTable() {
+void SelectableTableView::deselectTable(bool notifySelectableDelegate) {
   unhighlightSelectedCell();
   int previousSelectedCellX = selectedColumn();
   int previousSelectedCellY = selectedRow();
   selectColumn(0);
   selectRow(-1);
-  if (m_delegate) {
+  if (m_delegate && notifySelectableDelegate) {
     m_delegate->tableViewDidChangeSelection(this, previousSelectedCellX, previousSelectedCellY);
   }
 }
 
-bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstResponder) {
+bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstResponder, bool notifySelectableDelegate) {
   if (i < 0 || i >= dataSource()->numberOfColumns()) {
     return false;
   }
@@ -84,7 +84,7 @@ bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstRespon
   selectColumn(i);
   selectRow(j);
 
-  if (m_delegate) {
+  if (m_delegate && notifySelectableDelegate) {
     m_delegate->tableViewDidChangeSelection(this, previousX, previousY);
   }
 

From 6fd5cb360b7f31ec615920ecfc5b4f6302fbb338 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 22 Apr 2019 14:12:00 +0200
Subject: [PATCH 207/295] [calculation] Improve Calculation model: new display
 mode ExactAndApproximateToggle

---
 apps/calculation/calculation.cpp | 37 ++++++++++++++++++--------------
 apps/calculation/calculation.h   |  8 +++++--
 2 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index efa8823d8..298cb0002 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -19,7 +19,8 @@ Calculation::Calculation() :
   m_exactOutputText(),
   m_approximateOutputText(),
   m_height(-1),
-  m_equalSign(EqualSign::Unknown)
+  m_equalSign(EqualSign::Unknown),
+  m_toggleDisplayExact(false)
 {
 }
 
@@ -58,26 +59,31 @@ void Calculation::setContent(const char * c, Context * context, Expression ansEx
   PoincareHelpers::Serialize(approximateOutput, m_approximateOutputText, sizeof(m_approximateOutputText));
 }
 
-KDCoordinate Calculation::height(Context * context) {
-  if (m_height < 0) {
+KDCoordinate Calculation::height(Context * context, bool isSelected) {
+  if (m_height < 0 || isSelected) {
+    KDCoordinate height;
     Layout inputLayout = createInputLayout();
     KDCoordinate inputHeight = inputLayout.layoutSize().height();
     Layout approximateLayout = createApproximateOutputLayout(context);
     Layout exactLayout = createExactOutputLayout();
     DisplayOutput display = displayOutput(context);
-    if (display == DisplayOutput::ExactOnly) {
+    if (display == DisplayOutput::ExactOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && m_toggleDisplayExact)) {
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
-      m_height = inputHeight+exactOutputHeight;
-    } else if (display == DisplayOutput::ApproximateOnly) {
+      height = inputHeight+exactOutputHeight;
+    } else if (display == DisplayOutput::ApproximateOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && !m_toggleDisplayExact)) {
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
-      m_height = inputHeight+approximateOutputHeight;
+      height = inputHeight+approximateOutputHeight;
     } else {
-      assert(display == DisplayOutput::ExactAndApproximate);
+      assert(display == DisplayOutput::ExactAndApproximate || (display == DisplayOutput::ExactAndApproximateToggle && isSelected));
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
       KDCoordinate outputHeight = maxCoordinate(exactLayout.baseline(), approximateLayout.baseline()) + maxCoordinate(exactOutputHeight-exactLayout.baseline(), approximateOutputHeight-approximateLayout.baseline());
-      m_height = inputHeight + outputHeight;
+      height = inputHeight + outputHeight;
     }
+    if (isSelected) {
+      return height;
+    }
+    m_height = height;
   }
   return m_height;
 }
@@ -158,7 +164,6 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
   if (shouldOnlyDisplayExactOutput()) {
     return DisplayOutput::ExactOnly;
   }
-  bool approximateOnly = false;
   if (exactOutput().recursivelyMatches([](const Expression e, Context & c, bool replaceSymbols) {
         /* If the exact result contains one of the following types, do not
          * display it. */
@@ -166,19 +171,19 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
         return (t == ExpressionNode::Type::Random) || (t == ExpressionNode::Type::Round);},
         *context, true))
   {
-    approximateOnly = true;
+    return DisplayOutput::ApproximateOnly;
   } else if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal
      * because of the number of significant digits, we display both. */
-    approximateOnly = exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal;
+    return exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal ? DisplayOutput::ApproximateOnly : DisplayOutput::ExactAndApproximate;
   } else if (strcmp(m_exactOutputText, Undefined::Name()) == 0 || strcmp(m_approximateOutputText, Unreal::Name()) == 0) {
     // If the approximate result is 'unreal' or the exact result is 'undef'
-    approximateOnly = true;
-  } else {
-    approximateOnly = input().isApproximate(*context) || exactOutput().isApproximate(*context);
+    return DisplayOutput::ApproximateOnly;
+  } else if (input().isApproximate(*context) || exactOutput().isApproximate(*context)) {
+    return DisplayOutput::ExactAndApproximateToggle;
   }
-  return approximateOnly ? DisplayOutput::ApproximateOnly : DisplayOutput::ExactAndApproximate;
+  return DisplayOutput::ExactAndApproximate;
 }
 
 bool Calculation::shouldOnlyDisplayExactOutput() {
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index 0a4822209..26ea185bf 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -21,7 +21,8 @@ public:
   enum class DisplayOutput : uint8_t {
     ExactOnly,
     ApproximateOnly,
-    ExactAndApproximate
+    ExactAndApproximate,
+    ExactAndApproximateToggle
   };
 
   Calculation();
@@ -29,7 +30,7 @@ public:
   /* c.reset() is the equivalent of c = Calculation() without copy assingment. */
   void reset();
   void setContent(const char * c, Poincare::Context * context, Poincare::Expression ansExpression);
-  KDCoordinate height(Poincare::Context * context);
+  KDCoordinate height(Poincare::Context * context, bool isSelected = false);
   const char * inputText();
   const char * exactOutputText();
   const char * approximateOutputText();
@@ -42,6 +43,8 @@ public:
   bool isEmpty();
   void tidy();
   DisplayOutput displayOutput(Poincare::Context * context);
+  bool toggleDisplayExact() const { return m_toggleDisplayExact; }
+  void setToggleDisplayExact(bool displayExact) { m_toggleDisplayExact = displayExact; }
   bool shouldOnlyDisplayExactOutput();
   EqualSign exactAndApproximateDisplayedOutputsAreEqual(Poincare::Context * context);
 private:
@@ -54,6 +57,7 @@ private:
   char m_approximateOutputText[Constant::MaxSerializedExpressionSize];
   KDCoordinate m_height;
   EqualSign m_equalSign;
+  bool m_toggleDisplayExact;
 };
 
 }

From 80078137d5b55cab72587abdfb0fabc76e117fcc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 22 Apr 2019 14:14:15 +0200
Subject: [PATCH 208/295] [calculation] Display exact and approximate outputs
 in the calculation history when the output is selected for calculations
 involving decimal numbers (1.2)

---
 apps/calculation/history_controller.cpp |  7 +++++--
 apps/calculation/history_controller.h   |  1 +
 apps/calculation/history_view_cell.cpp  | 10 ++++------
 apps/calculation/history_view_cell.h    |  7 ++++++-
 4 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/apps/calculation/history_controller.cpp b/apps/calculation/history_controller.cpp
index ba3ec25cd..c3a5e1caf 100644
--- a/apps/calculation/history_controller.cpp
+++ b/apps/calculation/history_controller.cpp
@@ -106,6 +106,9 @@ bool HistoryController::handleEvent(Ion::Events::Event event) {
 }
 
 void HistoryController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+  if (previousSelectedCellY == selectedRow()) {
+    return;
+  }
   if (previousSelectedCellY == -1) {
     setSelectedSubviewType(SubviewType::Output);
   } else if (selectedRow() < previousSelectedCellY) {
@@ -139,7 +142,7 @@ int HistoryController::reusableCellCount(int type) {
 
 void HistoryController::willDisplayCellForIndex(HighlightCell * cell, int index) {
   HistoryViewCell * myCell = (HistoryViewCell *)cell;
-  myCell->setCalculation(m_calculationStore->calculationAtIndex(index));
+  myCell->setCalculation(m_calculationStore->calculationAtIndex(index), index == selectedRow() && selectedSubviewType() == SubviewType::Output);
   myCell->setEven(index%2 == 0);
   myCell->reloadCell();
 }
@@ -150,7 +153,7 @@ KDCoordinate HistoryController::rowHeight(int j) {
   }
   Calculation * calculation = m_calculationStore->calculationAtIndex(j);
   App * calculationApp = (App *)app();
-  return calculation->height(calculationApp->localContext()) + 4 * Metric::CommonSmallMargin;
+  return calculation->height(calculationApp->localContext(), j == selectedRow() && selectedSubviewType() == SubviewType::Output) + 4 * Metric::CommonSmallMargin;
 }
 
 int HistoryController::typeAtLocation(int i, int j) {
diff --git a/apps/calculation/history_controller.h b/apps/calculation/history_controller.h
index c80346b25..a41c9d501 100644
--- a/apps/calculation/history_controller.h
+++ b/apps/calculation/history_controller.h
@@ -28,6 +28,7 @@ public:
   void scrollToCell(int i, int j);
 private:
   CalculationSelectableTableView * selectableTableView();
+  void historyViewCellDidChangeSelection() override { m_selectableTableView.reloadData(); }
   constexpr static int k_maxNumberOfDisplayedRows = 5;
   CalculationSelectableTableView m_selectableTableView;
   HistoryViewCell m_calculationHistory[k_maxNumberOfDisplayedRows];
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index de27689ed..11a9bcb25 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -20,6 +20,7 @@ void HistoryViewCellDataSource::setSelectedSubviewType(SubviewType subviewType,
   if (cell) {
     cell->setHighlighted(cell->isHighlighted());
   }
+  historyViewCellDidChangeSelection();
 }
 
 /* HistoryViewCell */
@@ -111,10 +112,7 @@ void HistoryViewCell::layoutSubviews() {
   ));
 }
 
-void HistoryViewCell::setCalculation(Calculation * calculation) {
-  if (*calculation == m_calculation) {
-    return;
-  }
+void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected) {
   m_calculation = *calculation;
   m_inputView.setLayout(calculation->createInputLayout());
   App * calculationApp = (App *)app();
@@ -124,11 +122,11 @@ void HistoryViewCell::setCalculation(Calculation * calculation) {
   Poincare::Layout leftOutputLayout = Poincare::Layout();
   Poincare::Layout rightOutputLayout;
   Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
-  if (display == Calculation::DisplayOutput::ExactOnly) {
+  if (display == Calculation::DisplayOutput::ExactOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !isSelected && calculation->toggleDisplayExact())) {
     rightOutputLayout = calculation->createExactOutputLayout();
   } else {
     rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());
-    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
+    if (display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && isSelected)) {
       leftOutputLayout = calculation->createExactOutputLayout();
     }
   }
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index 90cdf0944..d18f7c845 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -20,6 +20,10 @@ public:
   void setSelectedSubviewType(SubviewType subviewType, HistoryViewCell * cell = nullptr);
   SubviewType selectedSubviewType() { return m_selectedSubviewType; }
 private:
+  /* This method should belong to a delegate instead of a data source but as
+   * both the data source and the delegate will be the same controller, we
+   * avoid keeping 2 pointers in HistoryViewCell. */
+  virtual void historyViewCellDidChangeSelection() = 0;
   SubviewType m_selectedSubviewType;
 };
 
@@ -36,7 +40,8 @@ public:
   }
   Poincare::Layout layout() const override;
   KDColor backgroundColor() const override;
-  void setCalculation(Calculation * calculation);
+  Calculation * calculation() { return &m_calculation; }
+  void setCalculation(Calculation * calculation, bool isSelected = false);
   int numberOfSubviews() const override;
   View * subviewAtIndex(int index) override;
   void layoutSubviews() override;

From a3f669fb08d4b11064bdf5a0a01aabd3956719cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 23 Apr 2019 11:14:39 +0200
Subject: [PATCH 209/295] [escher] TextView: avoid useless markRectAsDirty when
 updating backgroundColor and textColor

---
 escher/src/text_view.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/escher/src/text_view.cpp b/escher/src/text_view.cpp
index b8bc1b8e9..384b81ea3 100644
--- a/escher/src/text_view.cpp
+++ b/escher/src/text_view.cpp
@@ -1,13 +1,17 @@
 #include <escher/text_view.h>
 
 void TextView::setBackgroundColor(KDColor backgroundColor) {
-  m_backgroundColor = backgroundColor;
-  markRectAsDirty(bounds());
+  if (m_backgroundColor != backgroundColor) {
+    m_backgroundColor = backgroundColor;
+    markRectAsDirty(bounds());
+  }
 }
 
 void TextView::setTextColor(KDColor textColor) {
-  m_textColor = textColor;
-  markRectAsDirty(bounds());
+  if (m_textColor != textColor) {
+    m_textColor = textColor;
+    markRectAsDirty(bounds());
+  }
 }
 
 void TextView::setAlignment(float horizontalAlignment, float verticalAlignment) {

From 06a8382ff4e9d5dacd0fdb17cbe57bb122fb701b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 23 Apr 2019 11:15:17 +0200
Subject: [PATCH 210/295] [shared] ScrollableExactApproximateExpressionsView:
 change the selected output only when one of the two layout is uninitialized.
 Otherwise, the parent cell decides of which of right or left output should be
 selected.

---
 apps/calculation/history_view_cell.cpp                    | 8 ++++++++
 .../scrollable_exact_approximate_expressions_cell.cpp     | 1 +
 .../scrollable_exact_approximate_expressions_view.cpp     | 3 ++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 11a9bcb25..97108cd5c 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -133,6 +133,14 @@ void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected)
   m_scrollableOutputView.setLayouts(rightOutputLayout, leftOutputLayout);
   I18n::Message equalMessage = calculation->exactAndApproximateDisplayedOutputsAreEqual(calculationApp->localContext()) == Calculation::EqualSign::Equal ? I18n::Message::Equal : I18n::Message::AlmostEqual;
   m_scrollableOutputView.setEqualMessage(equalMessage);
+
+  // Select the right output according to the calculation display output
+  if (display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && isSelected)) {
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
+  } else {
+    assert(display == Calculation::DisplayOutput::ExactOnly || display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !isSelected));
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
+  }
 }
 
 void HistoryViewCell::didBecomeFirstResponder() {
diff --git a/apps/shared/scrollable_exact_approximate_expressions_cell.cpp b/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
index e9c456b75..3894849dd 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
@@ -30,6 +30,7 @@ void ScrollableExactApproximateExpressionsCell::reloadScroll() {
 }
 
 void ScrollableExactApproximateExpressionsCell::didBecomeFirstResponder() {
+  m_view.setSelectedSubviewPosition(ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
   app()->setFirstResponder(&m_view);
 }
 
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index 0e003e857..d7a8fd0e3 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -126,7 +126,8 @@ void ScrollableExactApproximateExpressionsView::setEqualMessage(I18n::Message eq
 void ScrollableExactApproximateExpressionsView::didBecomeFirstResponder() {
   if (m_contentCell.leftExpressionView()->layout().isUninitialized()) {
     setSelectedSubviewPosition(SubviewPosition::Right);
-  } else {
+  }
+  if (m_contentCell.rightExpressionView()->layout().isUninitialized()) {
     setSelectedSubviewPosition(SubviewPosition::Left);
   }
 }

From 7db575a4ba280170e4b1aae624aad905a0da9abd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Tue, 23 Apr 2019 15:12:14 +0200
Subject: [PATCH 211/295] [calculation] Calculation: improve memoization of a
 calculation height

---
 apps/calculation/calculation.cpp | 33 ++++++++++++++++++--------------
 apps/calculation/calculation.h   |  1 +
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 298cb0002..fc8f55f1a 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -19,6 +19,7 @@ Calculation::Calculation() :
   m_exactOutputText(),
   m_approximateOutputText(),
   m_height(-1),
+  m_selectedHeight(-1),
   m_equalSign(EqualSign::Unknown),
   m_toggleDisplayExact(false)
 {
@@ -60,32 +61,35 @@ void Calculation::setContent(const char * c, Context * context, Expression ansEx
 }
 
 KDCoordinate Calculation::height(Context * context, bool isSelected) {
-  if (m_height < 0 || isSelected) {
-    KDCoordinate height;
+  KDCoordinate * memoizedHeight = isSelected ? &m_selectedHeight : &m_height;
+  if (*memoizedHeight < 0) {
+    DisplayOutput display = displayOutput(context);
     Layout inputLayout = createInputLayout();
     KDCoordinate inputHeight = inputLayout.layoutSize().height();
-    Layout approximateLayout = createApproximateOutputLayout(context);
-    Layout exactLayout = createExactOutputLayout();
-    DisplayOutput display = displayOutput(context);
     if (display == DisplayOutput::ExactOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && m_toggleDisplayExact)) {
-      KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
-      height = inputHeight+exactOutputHeight;
+      KDCoordinate exactOutputHeight = createExactOutputLayout().layoutSize().height();
+      *memoizedHeight = inputHeight+exactOutputHeight;
     } else if (display == DisplayOutput::ApproximateOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && !m_toggleDisplayExact)) {
-      KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
-      height = inputHeight+approximateOutputHeight;
+      KDCoordinate approximateOutputHeight = createApproximateOutputLayout(context).layoutSize().height();
+      *memoizedHeight = inputHeight+approximateOutputHeight;
     } else {
       assert(display == DisplayOutput::ExactAndApproximate || (display == DisplayOutput::ExactAndApproximateToggle && isSelected));
+      Layout approximateLayout = createApproximateOutputLayout(context);
+      Layout exactLayout = createExactOutputLayout();
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
       KDCoordinate exactOutputHeight = exactLayout.layoutSize().height();
       KDCoordinate outputHeight = maxCoordinate(exactLayout.baseline(), approximateLayout.baseline()) + maxCoordinate(exactOutputHeight-exactLayout.baseline(), approximateOutputHeight-approximateLayout.baseline());
-      height = inputHeight + outputHeight;
+      *memoizedHeight = inputHeight + outputHeight;
     }
-    if (isSelected) {
-      return height;
+    /* For all display output except ExactAndApproximateToggle, the selected
+     * height and the usual height are identical. We update both heights in
+     * theses cases. */
+    if (display != DisplayOutput::ExactAndApproximateToggle) {
+      m_height = *memoizedHeight;
+      m_selectedHeight = *memoizedHeight;
     }
-    m_height = height;
   }
-  return m_height;
+  return *memoizedHeight;
 }
 
 const char * Calculation::inputText() {
@@ -125,6 +129,7 @@ bool Calculation::isEmpty() {
 void Calculation::tidy() {
   /* Uninitialized all Expression stored to free the Pool */
   m_height = -1;
+  m_selectedHeight = -1;
   m_equalSign = EqualSign::Unknown;
 }
 
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index 26ea185bf..ac16e8fd2 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -56,6 +56,7 @@ private:
   char m_exactOutputText[Constant::MaxSerializedExpressionSize];
   char m_approximateOutputText[Constant::MaxSerializedExpressionSize];
   KDCoordinate m_height;
+  KDCoordinate m_selectedHeight;
   EqualSign m_equalSign;
   bool m_toggleDisplayExact;
 };

From 8afbee8b891224e0ee878b9ca7c5098a1039cfec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 09:43:22 +0200
Subject: [PATCH 212/295] [shared] ScrollableExactApproximateExpressionsView:
 selecting the right or left output reload the scroll to display the selected
 output

---
 ...crollable_exact_approximate_expressions_view.cpp | 13 ++++++++++++-
 .../scrollable_exact_approximate_expressions_view.h |  4 +---
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index d7a8fd0e3..58f68ef10 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -123,6 +123,17 @@ void ScrollableExactApproximateExpressionsView::setEqualMessage(I18n::Message eq
   m_contentCell.approximateSign()->setMessage(equalSignMessage);
 }
 
+void ScrollableExactApproximateExpressionsView::setSelectedSubviewPosition(SubviewPosition subviewPosition, bool scrollToSelection) {
+  m_contentCell.setSelectedSubviewPosition(subviewPosition);
+  if (scrollToSelection) {
+    if (subviewPosition == SubviewPosition::Left) {
+      reloadScroll();
+    } else {
+      scrollToContentRect(m_contentCell.bounds(), true);
+    }
+  }
+}
+
 void ScrollableExactApproximateExpressionsView::didBecomeFirstResponder() {
   if (m_contentCell.leftExpressionView()->layout().isUninitialized()) {
     setSelectedSubviewPosition(SubviewPosition::Right);
@@ -142,7 +153,7 @@ bool ScrollableExactApproximateExpressionsView::handleEvent(Ion::Events::Event e
   if ((event == Ion::Events::Right && selectedSubviewPosition() == SubviewPosition::Left && rightExpressionIsVisible) ||
     (event == Ion::Events::Left && selectedSubviewPosition() == SubviewPosition::Right && leftExpressionIsVisible)) {
     SubviewPosition otherSubviewPosition = selectedSubviewPosition() == SubviewPosition::Left ? SubviewPosition::Right : SubviewPosition::Left;
-    setSelectedSubviewPosition(otherSubviewPosition);
+    setSelectedSubviewPosition(otherSubviewPosition, false);
     return true;
   }
   return ScrollableView::handleEvent(event);
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.h b/apps/shared/scrollable_exact_approximate_expressions_view.h
index 38a35357e..10b581861 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.h
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.h
@@ -20,9 +20,7 @@ public:
   SubviewPosition selectedSubviewPosition() {
     return m_contentCell.selectedSubviewPosition();
   }
-  void setSelectedSubviewPosition(SubviewPosition subviewPosition) {
-    m_contentCell.setSelectedSubviewPosition(subviewPosition);
-  }
+  void setSelectedSubviewPosition(SubviewPosition subviewPosition, bool reloadScroll = true);
   void didBecomeFirstResponder() override;
   bool handleEvent(Ion::Events::Event event) override;
   Poincare::Layout layout() const {

From 8e0d3065f749682350658c3407de6d6badbe7e2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 09:45:29 +0200
Subject: [PATCH 213/295] [calculation] HistoryViewCell: reloadCell selects the
 right or left output according to the calculation hold (this enables to
 discard unnecessary reloadScroll)

---
 apps/calculation/history_view_cell.cpp | 25 ++++++++++++-------------
 apps/calculation/history_view_cell.h   |  1 -
 2 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 97108cd5c..3310771c5 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -56,7 +56,6 @@ void HistoryViewCell::setHighlighted(bool highlight) {
       m_scrollableOutputView.evenOddCell()->setHighlighted(true);
     }
   }
-  reloadScroll();
 }
 
 Poincare::Layout HistoryViewCell::layout() const {
@@ -71,12 +70,20 @@ Poincare::Layout HistoryViewCell::layout() const {
 void HistoryViewCell::reloadCell() {
   m_scrollableOutputView.evenOddCell()->reloadCell();
   layoutSubviews();
-  reloadScroll();
-}
 
-void HistoryViewCell::reloadScroll() {
+  // Reload input scroll
   m_inputView.reloadScroll();
-  m_scrollableOutputView.reloadScroll();
+
+  /* Select the right output according to the calculation display output. This
+   * will reload the scroll to display the selected output. */
+  App * calculationApp = (App *)app();
+  Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
+  if (display == Calculation::DisplayOutput::ExactAndApproximate) {
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
+  } else {
+  assert(display == Calculation::DisplayOutput::ApproximateOnly || display == Calculation::DisplayOutput::ExactAndApproximateToggle || display == Calculation::DisplayOutput::ExactOnly);
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
+  }
 }
 
 KDColor HistoryViewCell::backgroundColor() const {
@@ -133,14 +140,6 @@ void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected)
   m_scrollableOutputView.setLayouts(rightOutputLayout, leftOutputLayout);
   I18n::Message equalMessage = calculation->exactAndApproximateDisplayedOutputsAreEqual(calculationApp->localContext()) == Calculation::EqualSign::Equal ? I18n::Message::Equal : I18n::Message::AlmostEqual;
   m_scrollableOutputView.setEqualMessage(equalMessage);
-
-  // Select the right output according to the calculation display output
-  if (display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && isSelected)) {
-    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
-  } else {
-    assert(display == Calculation::DisplayOutput::ExactOnly || display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !isSelected));
-    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
-  }
 }
 
 void HistoryViewCell::didBecomeFirstResponder() {
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index d18f7c845..d106ce922 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -31,7 +31,6 @@ class HistoryViewCell : public ::EvenOddCell, public Responder {
 public:
   HistoryViewCell(Responder * parentResponder = nullptr);
   void reloadCell() override;
-  void reloadScroll();
   void setEven(bool even) override;
   void setHighlighted(bool highlight) override;
   void setDataSource(HistoryViewCellDataSource * dataSource) { m_dataSource = dataSource; }

From 240ed439e0299e146e4b978cd38d97c0197fdad0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 14:34:18 +0200
Subject: [PATCH 214/295] [escher] ScrollableView: discard duplicate data
 source of scrolling offset

---
 ...lable_exact_approximate_expressions_view.cpp |  4 ++--
 escher/include/escher/scrollable_view.h         |  1 -
 escher/src/scrollable_view.cpp                  | 17 +++++++----------
 3 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index 58f68ef10..dbb70ce11 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -147,9 +147,9 @@ bool ScrollableExactApproximateExpressionsView::handleEvent(Ion::Events::Event e
   if (m_contentCell.leftExpressionView()->layout().isUninitialized()) {
     return ScrollableView::handleEvent(event);
   }
-  bool rightExpressionIsVisible = minimalSizeForOptimalDisplay().width() - m_contentCell.rightExpressionView()->minimalSizeForOptimalDisplay().width() - m_manualScrollingOffset.x() < bounds().width()
+  bool rightExpressionIsVisible = minimalSizeForOptimalDisplay().width() - m_contentCell.rightExpressionView()->minimalSizeForOptimalDisplay().width() - contentOffset().x() < bounds().width()
 ;
-  bool leftExpressionIsVisible = m_contentCell.leftExpressionView()->minimalSizeForOptimalDisplay().width() - m_manualScrollingOffset.x() > 0;
+  bool leftExpressionIsVisible = m_contentCell.leftExpressionView()->minimalSizeForOptimalDisplay().width() - contentOffset().x() > 0;
   if ((event == Ion::Events::Right && selectedSubviewPosition() == SubviewPosition::Left && rightExpressionIsVisible) ||
     (event == Ion::Events::Left && selectedSubviewPosition() == SubviewPosition::Right && leftExpressionIsVisible)) {
     SubviewPosition otherSubviewPosition = selectedSubviewPosition() == SubviewPosition::Left ? SubviewPosition::Right : SubviewPosition::Left;
diff --git a/escher/include/escher/scrollable_view.h b/escher/include/escher/scrollable_view.h
index ba4aaea4e..6d82205e3 100644
--- a/escher/include/escher/scrollable_view.h
+++ b/escher/include/escher/scrollable_view.h
@@ -12,7 +12,6 @@ public:
   void reloadScroll(bool forceRelayout = false);
 protected:
   KDSize contentSize() const override;
-  KDPoint m_manualScrollingOffset;
 };
 
 #endif
diff --git a/escher/src/scrollable_view.cpp b/escher/src/scrollable_view.cpp
index 9efc0fd1e..5d5e90f57 100644
--- a/escher/src/scrollable_view.cpp
+++ b/escher/src/scrollable_view.cpp
@@ -7,8 +7,7 @@ static inline KDCoordinate maxCoordinate(KDCoordinate x, KDCoordinate y) { retur
 
 ScrollableView::ScrollableView(Responder * parentResponder, View * view, ScrollViewDataSource * dataSource) :
   Responder(parentResponder),
-  ScrollView(view, dataSource),
-  m_manualScrollingOffset(KDPointZero)
+  ScrollView(view, dataSource)
 {
   setDecoratorType(ScrollView::Decorator::Type::None);
 }
@@ -16,40 +15,38 @@ ScrollableView::ScrollableView(Responder * parentResponder, View * view, ScrollV
 bool ScrollableView::handleEvent(Ion::Events::Event event) {
   KDPoint translation = KDPointZero;
   if (event == Ion::Events::Left) {
-    KDCoordinate movementToEdge = m_manualScrollingOffset.x();
+    KDCoordinate movementToEdge = contentOffset().x();
     if (movementToEdge > 0) {
       translation = KDPoint(-minCoordinate(Metric::ScrollStep, movementToEdge), 0);
     }
   }
   if (event == Ion::Events::Right) {
-    KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().width() - bounds().width() - m_manualScrollingOffset.x();
+    KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().width() - bounds().width() - contentOffset().x();
     if (movementToEdge > 0) {
       translation = KDPoint(minCoordinate(Metric::ScrollStep, movementToEdge), 0);
     }
   }
   if (event == Ion::Events::Up) {
-    KDCoordinate movementToEdge = m_manualScrollingOffset.y();
+    KDCoordinate movementToEdge = contentOffset().y();
     if (movementToEdge > 0) {
       translation = KDPoint(0, -minCoordinate(Metric::ScrollStep, movementToEdge));
     }
   }
   if (event == Ion::Events::Down) {
-    KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().height() - bounds().height() - m_manualScrollingOffset.y();
+    KDCoordinate movementToEdge = minimalSizeForOptimalDisplay().height() - bounds().height() - contentOffset().y();
     if (movementToEdge > 0) {
       translation = KDPoint(0, minCoordinate(Metric::ScrollStep, movementToEdge));
     }
   }
   if (translation != KDPointZero) {
-    m_manualScrollingOffset = m_manualScrollingOffset.translatedBy(translation);
-    setContentOffset(m_manualScrollingOffset);
+    setContentOffset(contentOffset().translatedBy(translation));
     return true;
   }
   return false;
 }
 
 void ScrollableView::reloadScroll(bool forceReLayout) {
-  m_manualScrollingOffset = KDPointZero;
-  setContentOffset(m_manualScrollingOffset, forceReLayout);
+  setContentOffset(KDPointZero, forceReLayout);
 }
 
 KDSize ScrollableView::contentSize() const {

From 6c0e6b97092c3722804dbef323caf766cf960547 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 14:56:07 +0200
Subject: [PATCH 215/295] [shared] ScrollableExactApproximateExpressionsView:
 fix scrolling when selecting the left or right output result

---
 apps/shared/scrollable_exact_approximate_expressions_view.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index dbb70ce11..f0e0831f3 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -127,9 +127,11 @@ void ScrollableExactApproximateExpressionsView::setSelectedSubviewPosition(Subvi
   m_contentCell.setSelectedSubviewPosition(subviewPosition);
   if (scrollToSelection) {
     if (subviewPosition == SubviewPosition::Left) {
+      // Scroll to the left extremity
       reloadScroll();
     } else {
-      scrollToContentRect(m_contentCell.bounds(), true);
+      // Scroll to the right extremity
+      scrollToContentPoint(KDPoint(m_contentCell.bounds().width(), 0), true);
     }
   }
 }

From da1ee21fd5295a37af492304ddd67b397c65537e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 15:32:21 +0200
Subject: [PATCH 216/295] [poincare] VerticalOffsetLayout: change name of
 'Type' to 'Position'

---
 apps/regression/calculation_controller.cpp    |  2 +-
 apps/regression/model/cubic_model.cpp         |  4 +--
 apps/regression/model/exponential_model.cpp   |  2 +-
 apps/regression/model/logistic_model.cpp      |  2 +-
 apps/regression/model/power_model.cpp         |  2 +-
 apps/regression/model/quadratic_model.cpp     |  2 +-
 apps/regression/model/quartic_model.cpp       |  6 ++---
 apps/sequence/list/sequence_toolbox.cpp       |  6 ++---
 .../list/type_parameter_controller.cpp        |  2 +-
 apps/sequence/sequence.cpp                    | 10 +++----
 .../sub_menu/preferences_controller.cpp       |  2 +-
 apps/solver/solutions_controller.cpp          |  2 +-
 .../include/poincare/vertical_offset_layout.h | 14 +++++-----
 poincare/src/layout_cursor.cpp                |  8 +++---
 poincare/src/layout_helper.cpp                |  2 +-
 poincare/src/power.cpp                        |  2 +-
 poincare/src/symbol.cpp                       |  8 +++---
 poincare/src/vertical_offset_layout.cpp       | 26 +++++++++----------
 poincare/test/layouts.cpp                     | 14 +++++-----
 poincare/test/vertical_offset_layout.cpp      |  2 +-
 20 files changed, 59 insertions(+), 59 deletions(-)

diff --git a/apps/regression/calculation_controller.cpp b/apps/regression/calculation_controller.cpp
index 7a7bfce1b..0a0ddb1db 100644
--- a/apps/regression/calculation_controller.cpp
+++ b/apps/regression/calculation_controller.cpp
@@ -25,7 +25,7 @@ CalculationController::CalculationController(Responder * parentResponder, Button
   m_hideableCell(),
   m_store(store)
 {
-  m_r2Layout = HorizontalLayout::Builder(CodePointLayout::Builder('r', KDFont::SmallFont), VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript));
+  m_r2Layout = HorizontalLayout::Builder(CodePointLayout::Builder('r', KDFont::SmallFont), VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Position::Superscript));
   m_selectableTableView.setVerticalCellOverlap(0);
   m_selectableTableView.setBackgroundColor(Palette::WallScreenDark);
   m_selectableTableView.setMargins(k_margin, k_scrollBarMargin, k_scrollBarMargin, k_margin);
diff --git a/apps/regression/model/cubic_model.cpp b/apps/regression/model/cubic_model.cpp
index 7a1febc48..32bd4d4af 100644
--- a/apps/regression/model/cubic_model.cpp
+++ b/apps/regression/model/cubic_model.cpp
@@ -26,7 +26,7 @@ Layout CubicModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('b', k_layoutFont),
@@ -34,7 +34,7 @@ Layout CubicModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('c', k_layoutFont),
diff --git a/apps/regression/model/exponential_model.cpp b/apps/regression/model/exponential_model.cpp
index be49691c0..e29bdb047 100644
--- a/apps/regression/model/exponential_model.cpp
+++ b/apps/regression/model/exponential_model.cpp
@@ -22,7 +22,7 @@ Layout ExponentialModel::layout() {
             CodePointLayout::Builder(UCodePointMiddleDot, k_layoutFont),
             CodePointLayout::Builder('X', k_layoutFont)
           ),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         )
     };
     m_layout = HorizontalLayout::Builder(layoutChildren, size);
diff --git a/apps/regression/model/logistic_model.cpp b/apps/regression/model/logistic_model.cpp
index 9ff69660f..5ffe02a48 100644
--- a/apps/regression/model/logistic_model.cpp
+++ b/apps/regression/model/logistic_model.cpp
@@ -28,7 +28,7 @@ Layout LogisticModel::layout() {
       CodePointLayout::Builder('e', k_layoutFont),
       VerticalOffsetLayout::Builder(
           HorizontalLayout::Builder(exponentLayoutChildren, exponentSize),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         )
     };
     m_layout = FractionLayout::Builder(
diff --git a/apps/regression/model/power_model.cpp b/apps/regression/model/power_model.cpp
index 779d290a7..928e25514 100644
--- a/apps/regression/model/power_model.cpp
+++ b/apps/regression/model/power_model.cpp
@@ -19,7 +19,7 @@ Layout PowerModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('b', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       };
     m_layout = HorizontalLayout::Builder(layoutChildren, size);
diff --git a/apps/regression/model/quadratic_model.cpp b/apps/regression/model/quadratic_model.cpp
index 51b64eceb..a2cb20400 100644
--- a/apps/regression/model/quadratic_model.cpp
+++ b/apps/regression/model/quadratic_model.cpp
@@ -26,7 +26,7 @@ Layout QuadraticModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('b', k_layoutFont),
diff --git a/apps/regression/model/quartic_model.cpp b/apps/regression/model/quartic_model.cpp
index 84d021e6d..09388c0a3 100644
--- a/apps/regression/model/quartic_model.cpp
+++ b/apps/regression/model/quartic_model.cpp
@@ -26,7 +26,7 @@ Layout QuarticModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('4', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('b', k_layoutFont),
@@ -34,7 +34,7 @@ Layout QuarticModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('3', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('c', k_layoutFont),
@@ -42,7 +42,7 @@ Layout QuarticModel::layout() {
       CodePointLayout::Builder('X', k_layoutFont),
       VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2', k_layoutFont),
-          VerticalOffsetLayoutNode::Type::Superscript
+          VerticalOffsetLayoutNode::Position::Superscript
         ),
       CodePointLayout::Builder('+', k_layoutFont),
       CodePointLayout::Builder('d', k_layoutFont),
diff --git a/apps/sequence/list/sequence_toolbox.cpp b/apps/sequence/list/sequence_toolbox.cpp
index b71c41246..e6281baae 100644
--- a/apps/sequence/list/sequence_toolbox.cpp
+++ b/apps/sequence/list/sequence_toolbox.cpp
@@ -78,18 +78,18 @@ void SequenceToolbox::buildExtraCellsLayouts(const char * sequenceName, int recu
     const char * indice = j == 0 ? "n" : "n+1";
     m_addedCellLayout[j] = HorizontalLayout::Builder(
         CodePointLayout::Builder(sequenceName[0], KDFont::LargeFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Position::Subscript)
       );
     m_addedCellLayout[j+recurrenceDepth] = HorizontalLayout::Builder(
         CodePointLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Position::Subscript)
       );
   }
   if (recurrenceDepth < 2) {
     const char * indice = recurrenceDepth == 0 ? "n" : (recurrenceDepth == 1 ? "n+1" : "n+2");
     m_addedCellLayout[2*recurrenceDepth] = HorizontalLayout::Builder(
         CodePointLayout::Builder(otherSequenceName[0], KDFont::LargeFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(LayoutHelper::String(indice, strlen(indice), KDFont::LargeFont), VerticalOffsetLayoutNode::Position::Subscript)
       );
   }
 }
diff --git a/apps/sequence/list/type_parameter_controller.cpp b/apps/sequence/list/type_parameter_controller.cpp
index ab01f1c43..aa2e9b4e7 100644
--- a/apps/sequence/list/type_parameter_controller.cpp
+++ b/apps/sequence/list/type_parameter_controller.cpp
@@ -124,7 +124,7 @@ void TypeParameterController::willDisplayCellAtLocation(HighlightCell * cell, in
   const char * subscripts[3] = {"n", "n+1", "n+2"};
   m_layouts[j] = HorizontalLayout::Builder(
         CodePointLayout::Builder(nextName[0], font),
-        VerticalOffsetLayout::Builder(LayoutHelper::String(subscripts[j], strlen(subscripts[j]), font), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(LayoutHelper::String(subscripts[j], strlen(subscripts[j]), font), VerticalOffsetLayoutNode::Position::Subscript)
       );
   ExpressionTableCellWithPointer * myCell = (ExpressionTableCellWithPointer *)cell;
   myCell->setLayout(m_layouts[j]);
diff --git a/apps/sequence/sequence.cpp b/apps/sequence/sequence.cpp
index 818d6c087..cf03d9e9e 100644
--- a/apps/sequence/sequence.cpp
+++ b/apps/sequence/sequence.cpp
@@ -78,7 +78,7 @@ Poincare::Layout Sequence::nameLayout() {
   if (m_nameLayout.isUninitialized()) {
     m_nameLayout = HorizontalLayout::Builder(
         CodePointLayout::Builder(fullName()[0], KDFont::SmallFont),
-        VerticalOffsetLayout::Builder(CodePointLayout::Builder(Symbol(), KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Subscript)
+        VerticalOffsetLayout::Builder(CodePointLayout::Builder(Symbol(), KDFont::SmallFont), VerticalOffsetLayoutNode::Position::Subscript)
       );
   }
   return m_nameLayout;
@@ -236,16 +236,16 @@ void Sequence::DefinitionModel::buildName(Sequence * sequence) {
   if (sequence->type() == Type::Explicit) {
     m_name = HorizontalLayout::Builder(
         CodePointLayout::Builder(name, k_layoutFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String("n", 1, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n", 1, k_layoutFont), VerticalOffsetLayoutNode::Position::Subscript));
   } else if (sequence->type() == Type::SingleRecurrence) {
     m_name = HorizontalLayout::Builder(
         CodePointLayout::Builder(name, k_layoutFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String("n+1", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n+1", 3, k_layoutFont), VerticalOffsetLayoutNode::Position::Subscript));
   } else {
     assert(sequence->type() == Type::DoubleRecurrence);
     m_name = HorizontalLayout::Builder(
         CodePointLayout::Builder(name, k_layoutFont),
-        VerticalOffsetLayout::Builder(LayoutHelper::String("n+2", 3, k_layoutFont), VerticalOffsetLayoutNode::Type::Subscript));
+        VerticalOffsetLayout::Builder(LayoutHelper::String("n+2", 3, k_layoutFont), VerticalOffsetLayoutNode::Position::Subscript));
   }
 }
 
@@ -273,7 +273,7 @@ void Sequence::InitialConditionModel::buildName(Sequence * sequence) {
   Layout indexLayout = LayoutHelper::String(buffer, strlen(buffer), k_layoutFont);
   m_name = HorizontalLayout::Builder(
       CodePointLayout::Builder(sequence->fullName()[0], k_layoutFont),
-      VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Type::Subscript));
+      VerticalOffsetLayout::Builder(indexLayout, VerticalOffsetLayoutNode::Position::Subscript));
 }
 
 template double Sequence::templatedApproximateAtAbscissa<double>(double, SequenceContext*) const;
diff --git a/apps/settings/sub_menu/preferences_controller.cpp b/apps/settings/sub_menu/preferences_controller.cpp
index fb53112d4..527a4a530 100644
--- a/apps/settings/sub_menu/preferences_controller.cpp
+++ b/apps/settings/sub_menu/preferences_controller.cpp
@@ -94,7 +94,7 @@ Layout PreferencesController::layoutForPreferences(I18n::Message message) {
       const char * superscript = "𝐢θ";
       return HorizontalLayout::Builder(
           LayoutHelper::String(base, strlen(base), k_layoutFont),
-          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, strlen(superscript), k_layoutFont), VerticalOffsetLayoutNode::Type::Superscript)
+          VerticalOffsetLayout::Builder(LayoutHelper::String(superscript, strlen(superscript), k_layoutFont), VerticalOffsetLayoutNode::Position::Superscript)
         );
     }
     default:
diff --git a/apps/solver/solutions_controller.cpp b/apps/solver/solutions_controller.cpp
index 68041e423..346e053e6 100644
--- a/apps/solver/solutions_controller.cpp
+++ b/apps/solver/solutions_controller.cpp
@@ -77,7 +77,7 @@ SolutionsController::SolutionsController(Responder * parentResponder, EquationSt
   m_delta2Layout(),
   m_contentView(this)
 {
-  m_delta2Layout = HorizontalLayout::Builder(VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Type::Superscript), LayoutHelper::String("-4ac", 4, KDFont::SmallFont));
+  m_delta2Layout = HorizontalLayout::Builder(VerticalOffsetLayout::Builder(CodePointLayout::Builder('2', KDFont::SmallFont), VerticalOffsetLayoutNode::Position::Superscript), LayoutHelper::String("-4ac", 4, KDFont::SmallFont));
   const char * deltaB = "Δ=b";
   static_cast<HorizontalLayout&>(m_delta2Layout).addOrMergeChildAtIndex(LayoutHelper::String(deltaB, 3, KDFont::SmallFont), 0, false);
   for (int i = 0; i < EquationStore::k_maxNumberOfExactSolutions; i++) {
diff --git a/poincare/include/poincare/vertical_offset_layout.h b/poincare/include/poincare/vertical_offset_layout.h
index 94162aa44..7a5e35341 100644
--- a/poincare/include/poincare/vertical_offset_layout.h
+++ b/poincare/include/poincare/vertical_offset_layout.h
@@ -8,18 +8,18 @@ namespace Poincare {
 
 class VerticalOffsetLayoutNode final : public LayoutNode {
 public:
-  enum class Type {
+  enum class Position {
     Subscript,
     Superscript
   };
 
-  VerticalOffsetLayoutNode(Type type = Type::Superscript) :
+  VerticalOffsetLayoutNode(Position position = Position::Superscript) :
     LayoutNode(),
-    m_type(type)
+    m_position(position)
   {}
 
   // VerticalOffsetLayoutNode
-  Type type() const { return m_type; }
+  Position position() const { return m_position; }
 
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
@@ -37,7 +37,7 @@ public:
   int numberOfChildren() const override { return 1; }
 #if POINCARE_TREE_LOG
   virtual void logNodeName(std::ostream & stream) const override {
-    stream << (m_type == Type::Subscript ? "Subscript" : "Superscript");
+    stream << (m_position == Position::Subscript ? "Subscript" : "Superscript");
   }
 #endif
 
@@ -53,12 +53,12 @@ private:
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override {}
   LayoutNode * indiceLayout() { return childAtIndex(0); }
   LayoutNode * baseLayout();
-  Type m_type;
+  Position m_position;
 };
 
 class VerticalOffsetLayout final : public Layout {
 public:
-  static VerticalOffsetLayout Builder(Layout l, VerticalOffsetLayoutNode::Type type);
+  static VerticalOffsetLayout Builder(Layout l, VerticalOffsetLayoutNode::Position position);
   VerticalOffsetLayout() = delete;
 };
 
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index da42ec1a4..234d35b14 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -78,7 +78,7 @@ void LayoutCursor::addEmptyExponentialLayout() {
   EmptyLayout emptyLayout = EmptyLayout::Builder();
   HorizontalLayout sibling = HorizontalLayout::Builder(
       CodePointLayout::Builder(UCodePointScriptSmallE),
-      VerticalOffsetLayout::Builder(emptyLayout, VerticalOffsetLayoutNode::Type::Superscript));
+      VerticalOffsetLayout::Builder(emptyLayout, VerticalOffsetLayoutNode::Position::Superscript));
   m_layout.addSibling(this, sibling, false);
   m_layout = emptyLayout;
 }
@@ -103,13 +103,13 @@ void LayoutCursor::addEmptySquareRootLayout() {
 }
 
 void LayoutCursor::addEmptyPowerLayout() {
-  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(EmptyLayout::Builder(), VerticalOffsetLayoutNode::Type::Superscript);
+  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(EmptyLayout::Builder(), VerticalOffsetLayoutNode::Position::Superscript);
   privateAddEmptyPowerLayout(offsetLayout);
   m_layout = offsetLayout.childAtIndex(0);
 }
 
 void LayoutCursor::addEmptySquarePowerLayout() {
-  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(CodePointLayout::Builder('2'), VerticalOffsetLayoutNode::Type::Superscript);
+  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(CodePointLayout::Builder('2'), VerticalOffsetLayoutNode::Position::Superscript);
   privateAddEmptyPowerLayout(offsetLayout);
 }
 
@@ -121,7 +121,7 @@ void LayoutCursor::addEmptyTenPowerLayout() {
       CodePointLayout::Builder('0'),
       VerticalOffsetLayout::Builder(
         emptyLayout,
-        VerticalOffsetLayoutNode::Type::Superscript));
+        VerticalOffsetLayoutNode::Position::Superscript));
   m_layout.addSibling(this, sibling, false);
   m_layout = emptyLayout;
 }
diff --git a/poincare/src/layout_helper.cpp b/poincare/src/layout_helper.cpp
index 91a48b984..c5f989c62 100644
--- a/poincare/src/layout_helper.cpp
+++ b/poincare/src/layout_helper.cpp
@@ -92,7 +92,7 @@ HorizontalLayout LayoutHelper::CodePointString(const CodePoint * buffer, int buf
 
 Layout LayoutHelper::Logarithm(Layout argument, Layout index) {
   HorizontalLayout resultLayout = String("log", 3);
-  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(index, VerticalOffsetLayoutNode::Type::Subscript);
+  VerticalOffsetLayout offsetLayout = VerticalOffsetLayout::Builder(index, VerticalOffsetLayoutNode::Position::Subscript);
   resultLayout.addChildAtIndex(offsetLayout, resultLayout.numberOfChildren(), resultLayout.numberOfChildren(), nullptr);
   resultLayout.addOrMergeChildAtIndex(Parentheses(argument, false), resultLayout.numberOfChildren(), true);
   return resultLayout;
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index 07c2c9753..f17f5d676 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -138,7 +138,7 @@ Layout PowerNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, int
   result.addOrMergeChildAtIndex(childAtIndex(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, false);
   result.addChildAtIndex(VerticalOffsetLayout::Builder(
         indiceOperand->createLayout(floatDisplayMode, numberOfSignificantDigits),
-        VerticalOffsetLayoutNode::Type::Superscript),
+        VerticalOffsetLayoutNode::Position::Superscript),
       result.numberOfChildren(),
       result.numberOfChildren(),
       nullptr);
diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 4d64effca..65037ff94 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -90,28 +90,28 @@ Layout SymbolNode::createLayout(Preferences::PrintFloatMode floatDisplayMode, in
         CodePointLayout::Builder('u'),
         VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('n'),
-          VerticalOffsetLayoutNode::Type::Subscript));
+          VerticalOffsetLayoutNode::Position::Subscript));
   }
   if (strcmp(m_name, "u(n+1)") == 0) {
     return HorizontalLayout::Builder(
       CodePointLayout::Builder('u'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("n+1", 3),
-        VerticalOffsetLayoutNode::Type::Subscript));
+        VerticalOffsetLayoutNode::Position::Subscript));
   }
   if (strcmp(m_name, "v(n)") == 0) {
     return HorizontalLayout::Builder(
         CodePointLayout::Builder('v'),
         VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('n'),
-          VerticalOffsetLayoutNode::Type::Subscript));
+          VerticalOffsetLayoutNode::Position::Subscript));
   }
   if (strcmp(m_name, "v(n+1)") == 0) {
     return HorizontalLayout::Builder(
       CodePointLayout::Builder('v'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("n+1", 3),
-          VerticalOffsetLayoutNode::Type::Subscript));
+          VerticalOffsetLayoutNode::Position::Subscript));
   }
   return LayoutHelper::String(m_name, strlen(m_name));
 }
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 627e15af7..03077a5b3 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -54,7 +54,7 @@ void VerticalOffsetLayoutNode::moveCursorRight(LayoutCursor * cursor, bool * sho
 }
 
 void VerticalOffsetLayoutNode::moveCursorUp(LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
-  if (m_type == Type::Superscript) {
+  if (m_position == Position::Superscript) {
     // Case: Superscript.
     if (cursor->isEquivalentTo(LayoutCursor(this, LayoutCursor::Position::Right))) {
       // Case: Right. Move to the indice.
@@ -71,7 +71,7 @@ void VerticalOffsetLayoutNode::moveCursorUp(LayoutCursor * cursor, bool * should
   }
   /* Case: Subscript, Left or Right of the indice. Put the cursor at the same
    * position, pointing this. */
-  if (m_type == Type::Subscript
+  if (m_position == Position::Subscript
     && (cursor->isEquivalentTo(LayoutCursor(indiceLayout(), LayoutCursor::Position::Left))
       || cursor->isEquivalentTo(LayoutCursor(indiceLayout(), LayoutCursor::Position::Right))))
   {
@@ -82,7 +82,7 @@ void VerticalOffsetLayoutNode::moveCursorUp(LayoutCursor * cursor, bool * should
 }
 
 void VerticalOffsetLayoutNode::moveCursorDown(LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
-  if (m_type == Type::Subscript) {
+  if (m_position == Position::Subscript) {
     // Case: Subscript.
     if (cursor->isEquivalentTo(LayoutCursor(this, LayoutCursor::Position::Right))) {
       // Case: Right. Move to the indice.
@@ -99,7 +99,7 @@ void VerticalOffsetLayoutNode::moveCursorDown(LayoutCursor * cursor, bool * shou
   }
   /* Case: Superscript, Left or Right of the indice. Put the cursor at the same
    * position, pointing this. */
-  if (m_type == Type::Superscript
+  if (m_position == Position::Superscript
     && cursor->layoutNode() == indiceLayout())
   {
     cursor->setLayoutNode(this);
@@ -149,7 +149,7 @@ void VerticalOffsetLayoutNode::deleteBeforeCursor(LayoutCursor * cursor) {
 }
 
 int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
-  if (m_type == Type::Subscript) {
+  if (m_position == Position::Subscript) {
     if (bufferSize == 0) {
       return -1;
     }
@@ -172,7 +172,7 @@ int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferenc
 
     return numberOfChar;
   }
-  assert(m_type == Type::Superscript);
+  assert(m_position == Position::Superscript);
   /* If the layout is a superscript, write:
    * "UCodePointLeftSuperscript indice UCodePointRightSuperscript" */
   int numberOfChar = SerializationHelper::CodePoint(buffer, bufferSize, UCodePointLeftSuperscript);
@@ -189,7 +189,7 @@ int VerticalOffsetLayoutNode::serialize(char * buffer, int bufferSize, Preferenc
 KDSize VerticalOffsetLayoutNode::computeSize() {
   KDSize indiceSize = indiceLayout()->layoutSize();
   KDCoordinate width = indiceSize.width();
-  if (m_type == Type::Superscript) {
+  if (m_position == Position::Superscript) {
     LayoutNode * parentNode = parent();
     assert(parentNode != nullptr);
     assert(parentNode->isHorizontal());
@@ -203,7 +203,7 @@ KDSize VerticalOffsetLayoutNode::computeSize() {
 }
 
 KDCoordinate VerticalOffsetLayoutNode::computeBaseline() {
-  if (m_type == Type::Subscript) {
+  if (m_position == Position::Subscript) {
     return baseLayout()->baseline();
   } else {
     return indiceLayout()->layoutSize().height() - k_indiceHeight + baseLayout()->baseline();
@@ -212,17 +212,17 @@ KDCoordinate VerticalOffsetLayoutNode::computeBaseline() {
 
 KDPoint VerticalOffsetLayoutNode::positionOfChild(LayoutNode * child) {
   assert(child == indiceLayout());
-  if (m_type == Type::Superscript) {
+  if (m_position == Position::Superscript) {
     return KDPointZero;
   }
-  assert(m_type == Type::Subscript);
+  assert(m_position == Position::Subscript);
   return KDPoint(0, baseLayout()->layoutSize().height() - k_indiceHeight);
 }
 
 bool VerticalOffsetLayoutNode::willAddSibling(LayoutCursor * cursor, LayoutNode * sibling, bool moveCursor) {
   if (sibling->isVerticalOffset()) {
     VerticalOffsetLayoutNode * verticalOffsetSibling = static_cast<VerticalOffsetLayoutNode *>(sibling);
-    if (verticalOffsetSibling->type() == Type::Superscript) {
+    if (verticalOffsetSibling->position() == Position::Superscript) {
       Layout rootLayout = root();
       Layout thisRef = Layout(this);
       Layout parentRef = Layout(parent());
@@ -265,9 +265,9 @@ LayoutNode * VerticalOffsetLayoutNode::baseLayout() {
   return parentNode->childAtIndex(idxInParent - 1);
 }
 
-VerticalOffsetLayout VerticalOffsetLayout::Builder(Layout l, VerticalOffsetLayoutNode::Type type) {
+VerticalOffsetLayout VerticalOffsetLayout::Builder(Layout l, VerticalOffsetLayoutNode::Position position) {
   void * bufferNode = TreePool::sharedPool()->alloc(sizeof(VerticalOffsetLayoutNode));
-  VerticalOffsetLayoutNode * node = new (bufferNode) VerticalOffsetLayoutNode(type);
+  VerticalOffsetLayoutNode * node = new (bufferNode) VerticalOffsetLayoutNode(position);
   TreeHandle h = TreeHandle::BuildWithGhostChildren(node);
   h.replaceChildAtIndexInPlace(0, l);
   return static_cast<VerticalOffsetLayout &>(h);
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index 5a3171ffc..36c613be3 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -67,7 +67,7 @@ QUIZ_CASE(poincare_create_all_layouts) {
   EmptyLayout e23 = EmptyLayout::Builder();
   EmptyLayout e24 = EmptyLayout::Builder();
   SumLayout e25 = SumLayout::Builder(e21, e22, e23, e24);
-  VerticalOffsetLayout e26 = VerticalOffsetLayout::Builder(e25, VerticalOffsetLayoutNode::Type::Superscript);
+  VerticalOffsetLayout e26 = VerticalOffsetLayout::Builder(e25, VerticalOffsetLayoutNode::Position::Superscript);
 }
 
 Matrix BuildOneChildMatrix(Expression entry) {
@@ -141,7 +141,7 @@ QUIZ_CASE(poincare_parse_layouts) {
           CodePointLayout::Builder('3'),
           CodePointLayout::Builder('+'),
           CodePointLayout::Builder('4')),
-        VerticalOffsetLayoutNode::Type::Superscript));
+        VerticalOffsetLayoutNode::Position::Superscript));
   e = Power::Builder(
       Rational::Builder(2),
       Addition::Builder(
@@ -154,7 +154,7 @@ QUIZ_CASE(poincare_parse_layouts) {
   l1.addChildAtIndex(CodePointLayout::Builder('l'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(CodePointLayout::Builder('o'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(CodePointLayout::Builder('g'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
-  l1.addChildAtIndex(VerticalOffsetLayout::Builder(CodePointLayout::Builder('3'), VerticalOffsetLayoutNode::Type::Subscript), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
+  l1.addChildAtIndex(VerticalOffsetLayout::Builder(CodePointLayout::Builder('3'), VerticalOffsetLayoutNode::Position::Subscript), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(LeftParenthesisLayout::Builder(), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(CodePointLayout::Builder('2'), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
   l1.addChildAtIndex(RightParenthesisLayout::Builder(), l1.numberOfChildren(),  l1.numberOfChildren(), nullptr);
@@ -189,7 +189,7 @@ QUIZ_CASE(poincare_parse_layouts) {
       CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
         CodePointLayout::Builder('2'),
-        VerticalOffsetLayoutNode::Type::Superscript),
+        VerticalOffsetLayoutNode::Position::Superscript),
       CodePointLayout::Builder('!'));
   e = Factorial::Builder(
       Power::Builder(
@@ -223,7 +223,7 @@ QUIZ_CASE(poincare_parse_layouts) {
         CodePointLayout::Builder('3'),
         VerticalOffsetLayout::Builder(
           CodePointLayout::Builder('2'),
-          VerticalOffsetLayoutNode::Type::Superscript),
+          VerticalOffsetLayoutNode::Position::Superscript),
         CodePointLayout::Builder('!')),
       CodePointLayout::Builder('7'),
       CodePointLayout::Builder('4'),
@@ -251,7 +251,7 @@ QUIZ_CASE(poincare_parse_layouts) {
           CodePointLayout::Builder('7'),
           CodePointLayout::Builder('4'),
           CodePointLayout::Builder('5')),
-        VerticalOffsetLayoutNode::Type::Superscript));
+        VerticalOffsetLayoutNode::Position::Superscript));
   m = BuildOneChildMatrix(
       Factorial::Builder(
         Rational::Builder(3)));
@@ -268,7 +268,7 @@ QUIZ_CASE(poincare_parse_layouts) {
       CodePointLayout::Builder(UCodePointScriptSmallE),
       VerticalOffsetLayout::Builder(
         CodePointLayout::Builder('3'),
-        VerticalOffsetLayoutNode::Type::Superscript));
+        VerticalOffsetLayoutNode::Position::Superscript));
   e = Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3))));
   assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   assert_parsed_layout_is(l, e);
diff --git a/poincare/test/vertical_offset_layout.cpp b/poincare/test/vertical_offset_layout.cpp
index d30b58ee2..7da0bbae7 100644
--- a/poincare/test/vertical_offset_layout.cpp
+++ b/poincare/test/vertical_offset_layout.cpp
@@ -11,7 +11,7 @@ QUIZ_CASE(poincare_vertical_offset_layout_serialize) {
     CodePointLayout::Builder('2'),
       VerticalOffsetLayout::Builder(
         LayoutHelper::String("x+5", 3),
-        VerticalOffsetLayoutNode::Type::Superscript
+        VerticalOffsetLayoutNode::Position::Superscript
       )
     );
   assert(UCodePointLeftSuperscript == '\x12');

From 6fcb29b14778e5089ab7be58b3bff0bb451d8f79 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 15:45:55 +0200
Subject: [PATCH 217/295] [poincare] Layout: add a Type to all layouts

---
 .../include/poincare/absolute_value_layout.h  |  3 +++
 .../poincare/binomial_coefficient_layout.h    |  3 +++
 .../include/poincare/bracket_pair_layout.h    |  3 +++
 poincare/include/poincare/ceiling_layout.h    |  3 +++
 poincare/include/poincare/code_point_layout.h |  3 +++
 .../include/poincare/condensed_sum_layout.h   |  3 +++
 poincare/include/poincare/conjugate_layout.h  |  3 +++
 poincare/include/poincare/empty_layout.h      |  3 +++
 poincare/include/poincare/floor_layout.h      |  4 +++
 poincare/include/poincare/fraction_layout.h   |  3 +++
 poincare/include/poincare/grid_layout.h       |  3 +++
 poincare/include/poincare/horizontal_layout.h |  3 +++
 poincare/include/poincare/integral_layout.h   |  3 +++
 poincare/include/poincare/layout.h            |  3 +++
 poincare/include/poincare/layout_node.h       | 27 +++++++++++++++++++
 .../poincare/left_parenthesis_layout.h        |  3 +++
 .../poincare/left_square_bracket_layout.h     |  4 +++
 poincare/include/poincare/matrix_layout.h     |  3 +++
 poincare/include/poincare/nth_root_layout.h   |  3 +++
 poincare/include/poincare/product_layout.h    |  4 +++
 .../poincare/right_parenthesis_layout.h       |  3 +++
 .../poincare/right_square_bracket_layout.h    |  4 +++
 poincare/include/poincare/sum_layout.h        |  4 +++
 .../include/poincare/vertical_offset_layout.h |  3 +++
 24 files changed, 101 insertions(+)

diff --git a/poincare/include/poincare/absolute_value_layout.h b/poincare/include/poincare/absolute_value_layout.h
index 5a909f36d..f23b56737 100644
--- a/poincare/include/poincare/absolute_value_layout.h
+++ b/poincare/include/poincare/absolute_value_layout.h
@@ -11,6 +11,9 @@ class AbsoluteValueLayoutNode final : public BracketPairLayoutNode {
 public:
   using BracketPairLayoutNode::BracketPairLayoutNode;
 
+  // Layout
+  Type type() const override { return Type::AbsoluteValueLayout; }
+
   // SerializationHelperInterface
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, AbsoluteValue::s_functionHelper.name());
diff --git a/poincare/include/poincare/binomial_coefficient_layout.h b/poincare/include/poincare/binomial_coefficient_layout.h
index 2187496ce..9a6136616 100644
--- a/poincare/include/poincare/binomial_coefficient_layout.h
+++ b/poincare/include/poincare/binomial_coefficient_layout.h
@@ -11,6 +11,9 @@ class BinomialCoefficientLayoutNode final : public LayoutNode {
 public:
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::BinomialCoefficientLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/bracket_pair_layout.h b/poincare/include/poincare/bracket_pair_layout.h
index c3e33309b..7505596c8 100644
--- a/poincare/include/poincare/bracket_pair_layout.h
+++ b/poincare/include/poincare/bracket_pair_layout.h
@@ -10,6 +10,9 @@ class BracketPairLayoutNode : public LayoutNode {
 public:
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::BracketPairLayout; }
+
   static void RenderWithChildSize(KDSize childSize, KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor);
 
   // LayoutNode
diff --git a/poincare/include/poincare/ceiling_layout.h b/poincare/include/poincare/ceiling_layout.h
index 6a3755175..fe3377f5d 100644
--- a/poincare/include/poincare/ceiling_layout.h
+++ b/poincare/include/poincare/ceiling_layout.h
@@ -12,6 +12,9 @@ class CeilingLayoutNode final : public BracketPairLayoutNode {
 public:
   using BracketPairLayoutNode::BracketPairLayoutNode;
 
+  // Layout
+  Type type() const override { return Type::CeilingLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Ceiling::s_functionHelper.name());
   }
diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index 458641c39..e596c200c 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -20,6 +20,9 @@ public:
     m_font(font)
   {}
 
+  // Layout
+  Type type() const override { return Type::CodePointLayout; }
+
   // CodePointLayout
   CodePoint codePoint() const { return m_codePoint; }
   const KDFont * font() const { return m_font; }
diff --git a/poincare/include/poincare/condensed_sum_layout.h b/poincare/include/poincare/condensed_sum_layout.h
index 93c8ca9f9..0495cbdb1 100644
--- a/poincare/include/poincare/condensed_sum_layout.h
+++ b/poincare/include/poincare/condensed_sum_layout.h
@@ -13,6 +13,9 @@ class CondensedSumLayoutNode /*final*/ : public LayoutNode {
 public:
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::CondensedSumLayout; }
+
   /* CondensedSumLayout is only used in apps/shared/sum_graph_controller.cpp, in
    * a view with no cursor. */
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override { assert(false); }
diff --git a/poincare/include/poincare/conjugate_layout.h b/poincare/include/poincare/conjugate_layout.h
index 8dabdf3cf..4f7747d47 100644
--- a/poincare/include/poincare/conjugate_layout.h
+++ b/poincare/include/poincare/conjugate_layout.h
@@ -10,6 +10,9 @@ class ConjugateLayoutNode final : public LayoutNode {
 public:
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::ConjugateLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/empty_layout.h b/poincare/include/poincare/empty_layout.h
index cc07406bb..2b8a7ccea 100644
--- a/poincare/include/poincare/empty_layout.h
+++ b/poincare/include/poincare/empty_layout.h
@@ -13,6 +13,9 @@ public:
     Grey
   };
 
+  // Layout
+  Type type() const override { return Type::EmptyLayout; }
+
   EmptyLayoutNode(Color color = Color::Yellow, bool visible = true, const KDFont * font = KDFont::LargeFont, bool margins = true) :
     LayoutNode(),
     m_isVisible(visible),
diff --git a/poincare/include/poincare/floor_layout.h b/poincare/include/poincare/floor_layout.h
index 0e560a917..61e07f26f 100644
--- a/poincare/include/poincare/floor_layout.h
+++ b/poincare/include/poincare/floor_layout.h
@@ -11,6 +11,10 @@ namespace Poincare {
 class FloorLayoutNode final : public BracketPairLayoutNode {
 public:
   using BracketPairLayoutNode::BracketPairLayoutNode;
+
+  // Layout
+  Type type() const override { return Type::FloorLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::Prefix(this, buffer, bufferSize, floatDisplayMode, numberOfSignificantDigits, Floor::s_functionHelper.name());
   }
diff --git a/poincare/include/poincare/fraction_layout.h b/poincare/include/poincare/fraction_layout.h
index 03b3979b0..423198210 100644
--- a/poincare/include/poincare/fraction_layout.h
+++ b/poincare/include/poincare/fraction_layout.h
@@ -10,6 +10,9 @@ class FractionLayoutNode /*final*/ : public LayoutNode {
 public:
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::FractionLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/grid_layout.h b/poincare/include/poincare/grid_layout.h
index d6f8f8f70..f58fc3bc7 100644
--- a/poincare/include/poincare/grid_layout.h
+++ b/poincare/include/poincare/grid_layout.h
@@ -22,6 +22,9 @@ public:
     m_numberOfColumns(0)
   {}
 
+  // Layout
+  Type type() const override { return Type::GridLayout; }
+
   int numberOfRows() const { return m_numberOfRows; }
   int numberOfColumns() const { return m_numberOfColumns; }
   virtual void setNumberOfRows(int numberOfRows) { m_numberOfRows = numberOfRows; }
diff --git a/poincare/include/poincare/horizontal_layout.h b/poincare/include/poincare/horizontal_layout.h
index 6f11a7b78..86d118117 100644
--- a/poincare/include/poincare/horizontal_layout.h
+++ b/poincare/include/poincare/horizontal_layout.h
@@ -18,6 +18,9 @@ public:
     m_numberOfChildren(0)
   {}
 
+  // Layout
+  Type type() const override { return Type::HorizontalLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/integral_layout.h b/poincare/include/poincare/integral_layout.h
index 9b33b2c40..1a4836c61 100644
--- a/poincare/include/poincare/integral_layout.h
+++ b/poincare/include/poincare/integral_layout.h
@@ -14,6 +14,9 @@ public:
 
   using LayoutNode::LayoutNode;
 
+  // Layout
+  Type type() const override { return Type::IntegralLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index 7cffc3ded..10413cbdb 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -24,6 +24,9 @@ public:
     return static_cast<LayoutNode *>(TreeHandle::node());
   }
 
+  // Properties
+  LayoutNode::Type type() const { return node()->type(); }
+
   // Rendering
   void draw(KDContext * ctx, KDPoint p, KDColor expressionColor = KDColorBlack, KDColor backgroundColor = KDColorWhite) {
     return node()->draw(ctx, p, expressionColor, backgroundColor);
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index bfa3aaa9c..b63191ee8 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -16,6 +16,30 @@ public:
     Up,
     Down
   };
+  enum class Type : uint8_t {
+    AbsoluteValueLayout,
+    BinomialCoefficientLayout,
+    BracketPairLayout,
+    CeilingLayout,
+    CodePointLayout,
+    CondensedSumLayout,
+    ConjugateLayout,
+    EmptyLayout,
+    FloorLayout,
+    FractionLayout,
+    GridLayout,
+    HorizontalLayout,
+    IntegralLayout,
+    LeftParenthesisLayout,
+    LeftSquareBracketLayout,
+    MatrixLayout,
+    NthRootLayout,
+    ProductLayout,
+    RightParenthesisLayout,
+    RightSquareBracketLayout,
+    SumLayout,
+    VerticalOffsetLayout
+  };
 
   // Constructor
   LayoutNode() :
@@ -28,6 +52,9 @@ public:
   {
   }
 
+  /* Poor man's RTTI */
+  virtual Type type() const = 0;
+
   // Rendering
   void draw(KDContext * ctx, KDPoint p, KDColor expressionColor = KDColorBlack, KDColor backgroundColor = KDColorWhite);
   KDPoint origin();
diff --git a/poincare/include/poincare/left_parenthesis_layout.h b/poincare/include/poincare/left_parenthesis_layout.h
index 8aaa41bde..a528b628c 100644
--- a/poincare/include/poincare/left_parenthesis_layout.h
+++ b/poincare/include/poincare/left_parenthesis_layout.h
@@ -11,6 +11,9 @@ class LeftParenthesisLayoutNode final : public ParenthesisLayoutNode {
 public:
   using ParenthesisLayoutNode::ParenthesisLayoutNode;
 
+  // Layout
+  Type type() const override { return Type::LeftParenthesisLayout; }
+
   static void RenderWithChildHeight(KDCoordinate childHeight, KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor);
 
   // Layout Node
diff --git a/poincare/include/poincare/left_square_bracket_layout.h b/poincare/include/poincare/left_square_bracket_layout.h
index c4f069c44..3b01b8277 100644
--- a/poincare/include/poincare/left_square_bracket_layout.h
+++ b/poincare/include/poincare/left_square_bracket_layout.h
@@ -10,6 +10,10 @@ namespace Poincare {
 class LeftSquareBracketLayoutNode final : public SquareBracketLayoutNode {
 public:
   using SquareBracketLayoutNode::SquareBracketLayoutNode;
+
+  // Layout
+  Type type() const override { return Type::LeftSquareBracketLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::CodePoint(buffer, bufferSize, '[');
   }
diff --git a/poincare/include/poincare/matrix_layout.h b/poincare/include/poincare/matrix_layout.h
index 21cf04985..9f69ff35a 100644
--- a/poincare/include/poincare/matrix_layout.h
+++ b/poincare/include/poincare/matrix_layout.h
@@ -15,6 +15,9 @@ class MatrixLayoutNode final : public GridLayoutNode {
 public:
   using GridLayoutNode::GridLayoutNode;
 
+  // Layout
+  Type type() const override { return Type::MatrixLayout; }
+
   // MatrixLayoutNode
   void addGreySquares();
   void removeGreySquares();
diff --git a/poincare/include/poincare/nth_root_layout.h b/poincare/include/poincare/nth_root_layout.h
index 1b2e27fc9..6f95eb970 100644
--- a/poincare/include/poincare/nth_root_layout.h
+++ b/poincare/include/poincare/nth_root_layout.h
@@ -19,6 +19,9 @@ public:
     m_hasIndex(hasIndex)
   {}
 
+  // Layout
+  Type type() const override { return Type::NthRootLayout; }
+
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/product_layout.h b/poincare/include/poincare/product_layout.h
index 3ea063232..fa78f0b1a 100644
--- a/poincare/include/poincare/product_layout.h
+++ b/poincare/include/poincare/product_layout.h
@@ -9,6 +9,10 @@ namespace Poincare {
 class ProductLayoutNode final : public SequenceLayoutNode {
 public:
   using SequenceLayoutNode::SequenceLayoutNode;
+
+  // Layout
+  Type type() const override { return Type::ProductLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   size_t size() const override { return sizeof(ProductLayoutNode); }
 #if POINCARE_TREE_LOG
diff --git a/poincare/include/poincare/right_parenthesis_layout.h b/poincare/include/poincare/right_parenthesis_layout.h
index 4782c5fe3..c7cb54057 100644
--- a/poincare/include/poincare/right_parenthesis_layout.h
+++ b/poincare/include/poincare/right_parenthesis_layout.h
@@ -11,6 +11,9 @@ class RightParenthesisLayoutNode final : public ParenthesisLayoutNode {
 public:
   using ParenthesisLayoutNode::ParenthesisLayoutNode;
 
+  // Layout
+  Type type() const override { return Type::RightParenthesisLayout; }
+
   static void RenderWithChildHeight(KDCoordinate childHeight, KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor);
 
   // LayoutNode
diff --git a/poincare/include/poincare/right_square_bracket_layout.h b/poincare/include/poincare/right_square_bracket_layout.h
index e37132b85..fd1f6b83b 100644
--- a/poincare/include/poincare/right_square_bracket_layout.h
+++ b/poincare/include/poincare/right_square_bracket_layout.h
@@ -10,6 +10,10 @@ namespace Poincare {
 class RightSquareBracketLayoutNode final : public SquareBracketLayoutNode {
 public:
   using SquareBracketLayoutNode::SquareBracketLayoutNode;
+
+  // Layout
+  Type type() const override { return Type::RightSquareBracketLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::CodePoint(buffer, bufferSize, ']');
   }
diff --git a/poincare/include/poincare/sum_layout.h b/poincare/include/poincare/sum_layout.h
index 57c6206db..ee040c522 100644
--- a/poincare/include/poincare/sum_layout.h
+++ b/poincare/include/poincare/sum_layout.h
@@ -9,6 +9,10 @@ namespace Poincare {
 class SumLayoutNode final : public SequenceLayoutNode {
 public:
   using SequenceLayoutNode::SequenceLayoutNode;
+
+  // Layout
+  Type type() const override { return Type::SumLayout; }
+
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   size_t size() const override { return sizeof(SumLayoutNode); }
 #if POINCARE_TREE_LOG
diff --git a/poincare/include/poincare/vertical_offset_layout.h b/poincare/include/poincare/vertical_offset_layout.h
index 7a5e35341..92890b143 100644
--- a/poincare/include/poincare/vertical_offset_layout.h
+++ b/poincare/include/poincare/vertical_offset_layout.h
@@ -18,6 +18,9 @@ public:
     m_position(position)
   {}
 
+  // Layout
+  Type type() const override { return Type::VerticalOffsetLayout; }
+
   // VerticalOffsetLayoutNode
   Position position() const { return m_position; }
 

From 9665f11d068f2704718cb3b3e60f1d3e4ae5e712 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Wed, 24 Apr 2019 15:54:39 +0200
Subject: [PATCH 218/295] [poincare] Layout: discard methods
 isVerticalOffset(), isHorizontal(), isRightParenthesisLayout(),
 isLeftBracket(), isRightBracket(), isCodePoint(), isLeftParenthesisLayout()
 and use type() instead

---
 apps/solver/list_controller.cpp               |  2 +-
 escher/src/layout_field.cpp                   |  6 +--
 poincare/include/poincare/code_point_layout.h |  1 -
 poincare/include/poincare/horizontal_layout.h |  1 -
 poincare/include/poincare/layout.h            |  5 --
 poincare/include/poincare/layout_node.h       |  8 ----
 .../poincare/left_parenthesis_layout.h        |  1 -
 .../poincare/left_square_bracket_layout.h     |  1 -
 poincare/include/poincare/matrix_layout.h     |  1 -
 .../poincare/right_parenthesis_layout.h       |  1 -
 .../poincare/right_square_bracket_layout.h    |  1 -
 .../include/poincare/vertical_offset_layout.h |  1 -
 poincare/src/bracket_layout.cpp               | 46 +++++++++----------
 poincare/src/code_point_layout.cpp            |  2 +-
 poincare/src/fraction_layout.cpp              |  6 +--
 poincare/src/horizontal_layout.cpp            |  4 +-
 poincare/src/layout.cpp                       | 16 +++----
 poincare/src/layout_cursor.cpp                | 12 ++---
 poincare/src/layout_node.cpp                  |  2 +-
 poincare/src/matrix_layout.cpp                |  6 +--
 poincare/src/vertical_offset_layout.cpp       |  8 ++--
 21 files changed, 55 insertions(+), 76 deletions(-)

diff --git a/apps/solver/list_controller.cpp b/apps/solver/list_controller.cpp
index bd7f0eac4..bd8cb69a0 100644
--- a/apps/solver/list_controller.cpp
+++ b/apps/solver/list_controller.cpp
@@ -122,7 +122,7 @@ bool textRepresentsAnEquality(const char * text) {
 bool layoutRepresentsAnEquality(Poincare::Layout l) {
   Poincare::Layout match = l.recursivelyMatches(
       [](Poincare::Layout layout) {
-      return layout.isCodePoint() && static_cast<Poincare::CodePointLayout &>(layout).codePoint() == '='; });
+      return layout.type() == Poincare::LayoutNode::Type::CodePointLayout && static_cast<Poincare::CodePointLayout &>(layout).codePoint() == '='; });
   return !match.isUninitialized();
 }
 
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index 5fba22bea..1b6e030e6 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -136,10 +136,10 @@ bool LayoutField::handleEventWithText(const char * text, bool indentation, bool
           /* Special case: if the text is "random()", the cursor should not be set
            * inside the parentheses. */
           pointedLayout = resultLayout;
-        } else if (resultLayout.isHorizontal()) {
+        } else if (resultLayout.type() == LayoutNode::Type::HorizontalLayout) {
           pointedLayout = resultLayout.recursivelyMatches(
               [](Poincare::Layout layout) {
-              return layout.isLeftParenthesis() || layout.isEmpty();});
+              return layout.type() == LayoutNode::Type::LeftParenthesisLayout || layout.isEmpty();});
         }
       }
       /* Insert the layout. If pointedLayout is uninitialized, the cursor will
@@ -294,7 +294,7 @@ void LayoutField::insertLayoutAtCursor(Layout layoutR, Layout pointedLayoutR, bo
   // Handle empty layouts
   m_contentView.cursor()->showEmptyLayoutIfNeeded();
 
-  bool layoutWillBeMerged = layoutR.isHorizontal();
+  bool layoutWillBeMerged = layoutR.type() == LayoutNode::Type::HorizontalLayout;
   Layout lastMergedLayoutChild = layoutWillBeMerged ? layoutR.childAtIndex(layoutR.numberOfChildren()-1) : Layout();
 
   // Add the layout
diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index e596c200c..e2415325b 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -31,7 +31,6 @@ public:
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
-  bool isCodePoint() const override { return true; }
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override;
   bool canBeOmittedMultiplicationLeftFactor() const override;
   bool canBeOmittedMultiplicationRightFactor() const override;
diff --git a/poincare/include/poincare/horizontal_layout.h b/poincare/include/poincare/horizontal_layout.h
index 86d118117..1333108a8 100644
--- a/poincare/include/poincare/horizontal_layout.h
+++ b/poincare/include/poincare/horizontal_layout.h
@@ -28,7 +28,6 @@ public:
   void deleteBeforeCursor(LayoutCursor * cursor) override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
 
-  bool isHorizontal() const override { return true; }
   bool isEmpty() const override { return m_numberOfChildren == 1 && const_cast<HorizontalLayoutNode *>(this)->childAtIndex(0)->isEmpty(); }
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override { return m_numberOfChildren != 0; }
   bool hasText() const override;
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index 10413cbdb..c035096ec 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -48,11 +48,6 @@ public:
   Layout recursivelyMatches(LayoutTest test) const;
   bool mustHaveLeftSibling() const { return const_cast<Layout *>(this)->node()->mustHaveLeftSibling(); }
   bool isEmpty() const { return const_cast<Layout *>(this)->node()->isEmpty(); }
-  bool isHorizontal() const { return const_cast<Layout *>(this)->node()->isHorizontal(); }
-  bool isMatrix() const { return const_cast<Layout *>(this)->node()->isMatrix(); }
-  bool isVerticalOffset() const { return const_cast<Layout *>(this)->node()->isVerticalOffset(); }
-  bool isLeftParenthesis() const { return const_cast<Layout *>(this)->node()->isLeftParenthesis(); }
-  bool isCodePoint() const { return const_cast<Layout *>(this)->node()->isCodePoint(); }
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const { return const_cast<Layout *>(this)->node()->isCollapsable(numberOfOpenParenthesis, goingLeft); }
   int leftCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->leftCollapsingAbsorbingChildIndex(); }
   int rightCollapsingAbsorbingChildIndex() const { return const_cast<Layout *>(this)->node()->rightCollapsingAbsorbingChildIndex(); }
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index b63191ee8..b667d5d30 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -120,17 +120,9 @@ public:
    * returns true, because |3|2 means |3|*2. A '+' CodePointLayout returns false,
    * because +'something' nevers means +*'something'. */
   virtual bool mustHaveLeftSibling() const { return false; }
-  virtual bool isVerticalOffset() const { return false; }
   /* For now, mustHaveLeftSibling and isVerticalOffset behave the same, but code
    * is clearer with different names. */
-  virtual bool isHorizontal() const { return false; }
-  virtual bool isLeftParenthesis() const { return false; }
-  virtual bool isRightParenthesis() const { return false; }
-  virtual bool isLeftBracket() const { return false; }
-  virtual bool isRightBracket() const { return false; }
   virtual bool isEmpty() const { return false; }
-  virtual bool isMatrix() const { return false; }
-  virtual bool isCodePoint() const { return false; }
   virtual bool hasUpperLeftIndex() const { return false; }
   virtual CodePoint XNTCodePoint() const {
     LayoutNode * p = parent();
diff --git a/poincare/include/poincare/left_parenthesis_layout.h b/poincare/include/poincare/left_parenthesis_layout.h
index a528b628c..f552a16f7 100644
--- a/poincare/include/poincare/left_parenthesis_layout.h
+++ b/poincare/include/poincare/left_parenthesis_layout.h
@@ -18,7 +18,6 @@ public:
 
   // Layout Node
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override;
-  bool isLeftParenthesis() const override { return true; }
 
   // Serializable Node
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
diff --git a/poincare/include/poincare/left_square_bracket_layout.h b/poincare/include/poincare/left_square_bracket_layout.h
index 3b01b8277..6789a741d 100644
--- a/poincare/include/poincare/left_square_bracket_layout.h
+++ b/poincare/include/poincare/left_square_bracket_layout.h
@@ -17,7 +17,6 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::CodePoint(buffer, bufferSize, '[');
   }
-  bool isLeftBracket() const override { return true; }
 
   // TreeNode
   size_t size() const override { return sizeof(LeftSquareBracketLayoutNode); }
diff --git a/poincare/include/poincare/matrix_layout.h b/poincare/include/poincare/matrix_layout.h
index 9f69ff35a..3d68602f7 100644
--- a/poincare/include/poincare/matrix_layout.h
+++ b/poincare/include/poincare/matrix_layout.h
@@ -26,7 +26,6 @@ public:
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void moveCursorRight(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
   void willAddSiblingToEmptyChildAtIndex(int childIndex) override;
-  bool isMatrix() const override { return true; }
 
   // SerializableNode
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
diff --git a/poincare/include/poincare/right_parenthesis_layout.h b/poincare/include/poincare/right_parenthesis_layout.h
index c7cb54057..42c81295c 100644
--- a/poincare/include/poincare/right_parenthesis_layout.h
+++ b/poincare/include/poincare/right_parenthesis_layout.h
@@ -18,7 +18,6 @@ public:
 
   // LayoutNode
   bool isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const override;
-  bool isRightParenthesis() const override { return true; }
 
   // SerializableNode
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
diff --git a/poincare/include/poincare/right_square_bracket_layout.h b/poincare/include/poincare/right_square_bracket_layout.h
index fd1f6b83b..1689e7782 100644
--- a/poincare/include/poincare/right_square_bracket_layout.h
+++ b/poincare/include/poincare/right_square_bracket_layout.h
@@ -17,7 +17,6 @@ public:
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override {
     return SerializationHelper::CodePoint(buffer, bufferSize, ']');
   }
-  bool isRightBracket() const override { return true; }
 
   // TreeNode
   size_t size() const override { return sizeof(RightSquareBracketLayoutNode); }
diff --git a/poincare/include/poincare/vertical_offset_layout.h b/poincare/include/poincare/vertical_offset_layout.h
index 92890b143..77977a860 100644
--- a/poincare/include/poincare/vertical_offset_layout.h
+++ b/poincare/include/poincare/vertical_offset_layout.h
@@ -32,7 +32,6 @@ public:
   void deleteBeforeCursor(LayoutCursor * cursor) override;
   int serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const override;
   bool mustHaveLeftSibling() const override { return true; }
-  bool isVerticalOffset() const override { return true; }
   bool canBeOmittedMultiplicationRightFactor() const override { return false; }
 
   // TreeNode
diff --git a/poincare/src/bracket_layout.cpp b/poincare/src/bracket_layout.cpp
index a13f6d040..2b22c8aa5 100644
--- a/poincare/src/bracket_layout.cpp
+++ b/poincare/src/bracket_layout.cpp
@@ -47,9 +47,9 @@ KDCoordinate BracketLayoutNode::computeBaseline() {
   assert(parentLayout != nullptr);
   int idxInParent = parentLayout->indexOfChild(this);
   int numberOfSiblings = parentLayout->numberOfChildren();
-  if (((isLeftParenthesis() || isLeftBracket()) && idxInParent == numberOfSiblings - 1)
-      || ((isRightParenthesis() || isRightBracket()) && idxInParent == 0)
-      || ((isLeftParenthesis() || isLeftBracket()) && idxInParent < numberOfSiblings - 1 && parentLayout->childAtIndex(idxInParent + 1)->isVerticalOffset()))
+  if (((type() == Type::LeftParenthesisLayout || type() == Type::LeftSquareBracketLayout) && idxInParent == numberOfSiblings - 1)
+      || ((type() == Type::RightParenthesisLayout || type() == Type::RightSquareBracketLayout) && idxInParent == 0)
+      || ((type() == Type::LeftParenthesisLayout || type() == Type::LeftSquareBracketLayout) && idxInParent < numberOfSiblings - 1 && parentLayout->childAtIndex(idxInParent + 1)->type() == Type::VerticalOffsetLayout))
   {
     /* The bracket does not have siblings on its open direction, or it is a left
      * bracket that is base of a superscript layout. In the latter case, it
@@ -60,13 +60,13 @@ KDCoordinate BracketLayoutNode::computeBaseline() {
 
   int currentNumberOfOpenBrackets = 1;
   KDCoordinate result = 0;
-  int increment = (isLeftParenthesis() || isLeftBracket()) ? 1 : -1;
+  int increment = (type() == Type::LeftParenthesisLayout || type() == Type::LeftSquareBracketLayout) ? 1 : -1;
   for (int i = idxInParent + increment; i >= 0 && i < numberOfSiblings; i+=increment) {
     LayoutNode * sibling = parentLayout->childAtIndex(i);
-    if ((isLeftParenthesis() && sibling->isRightParenthesis())
-        || (isLeftBracket() && sibling->isRightBracket())
-        || (isRightParenthesis() && sibling->isLeftParenthesis())
-        || (isRightBracket() && sibling->isLeftBracket()))
+    if ((type() == Type::LeftParenthesisLayout && sibling->type() == Type::RightParenthesisLayout)
+        || (type() == Type::LeftSquareBracketLayout && sibling->type() == Type::RightSquareBracketLayout)
+        || (type() == Type::RightParenthesisLayout && sibling->type() == Type::LeftParenthesisLayout)
+        || (type() == Type::RightSquareBracketLayout && sibling->type() == Type::LeftSquareBracketLayout))
     {
       if (i == idxInParent + increment) {
         /* If the bracket is immediately closed, we set the baseline to half the
@@ -77,10 +77,10 @@ KDCoordinate BracketLayoutNode::computeBaseline() {
       if (currentNumberOfOpenBrackets == 0) {
         break;
       }
-    } else if ((isLeftParenthesis() && sibling->isLeftParenthesis())
-        || (isLeftBracket() && sibling->isLeftBracket())
-        || (isRightParenthesis() && sibling->isRightParenthesis())
-        || (isRightBracket() && sibling->isRightBracket()))
+    } else if ((type() == Type::LeftParenthesisLayout && sibling->type() == Type::LeftParenthesisLayout)
+        || (type() == Type::LeftSquareBracketLayout && sibling->type() == Type::LeftSquareBracketLayout)
+        || (type() == Type::RightParenthesisLayout && sibling->type() == Type::RightParenthesisLayout)
+        || (type() == Type::RightSquareBracketLayout && sibling->type() == Type::RightSquareBracketLayout))
     {
       currentNumberOfOpenBrackets++;
     }
@@ -103,9 +103,9 @@ KDCoordinate BracketLayoutNode::computeChildHeight() {
   KDCoordinate result = Metric::MinimalBracketAndParenthesisHeight;
   int idxInParent = parentLayout->indexOfChild(this);
   int numberOfSiblings = parentLayout->numberOfChildren();
-  if ((isLeftParenthesis() || isLeftBracket())
+  if ((type() == Type::LeftParenthesisLayout || type() == Type::LeftSquareBracketLayout)
       && idxInParent < numberOfSiblings - 1
-      && parentLayout->childAtIndex(idxInParent + 1)->isVerticalOffset())
+      && parentLayout->childAtIndex(idxInParent + 1)->type() == Type::VerticalOffsetLayout)
   {
     /* If a left bracket is the base of a superscript layout, it should have a
      * a default height, else it creates an infinite loop because the bracket
@@ -117,22 +117,22 @@ KDCoordinate BracketLayoutNode::computeChildHeight() {
   KDCoordinate maxAboveBaseline = 0;
 
   int currentNumberOfOpenBrackets = 1;
-  int increment = (isLeftParenthesis() || isLeftBracket()) ? 1 : -1;
+  int increment = (type() == Type::LeftParenthesisLayout || type() == Type::LeftSquareBracketLayout) ? 1 : -1;
   for (int i = idxInParent + increment; i >= 0 && i < numberOfSiblings; i+= increment) {
     LayoutNode * sibling = parentLayout->childAtIndex(i);
-    if ((isLeftParenthesis() && sibling->isRightParenthesis())
-        || (isLeftBracket() && sibling->isRightBracket())
-        || (isRightParenthesis() && sibling->isLeftParenthesis())
-        || (isRightBracket() && sibling->isLeftBracket()))
+    if ((type() == Type::LeftParenthesisLayout && sibling->type() == Type::RightParenthesisLayout)
+        || (type() == Type::LeftSquareBracketLayout && sibling->type() == Type::RightSquareBracketLayout)
+        || (type() == Type::RightParenthesisLayout && sibling->type() == Type::LeftParenthesisLayout)
+        || (type() == Type::RightSquareBracketLayout && sibling->type() == Type::LeftSquareBracketLayout))
     {
       currentNumberOfOpenBrackets--;
       if (currentNumberOfOpenBrackets == 0) {
         break;
       }
-    } else if ((isLeftParenthesis() && sibling->isLeftParenthesis())
-        || (isLeftBracket() && sibling->isLeftBracket())
-        || (isRightParenthesis() && sibling->isRightParenthesis())
-        || (isRightBracket() && sibling->isRightBracket()))
+    } else if ((type() == Type::LeftParenthesisLayout && sibling->type() == Type::LeftParenthesisLayout)
+        || (type() == Type::LeftSquareBracketLayout && sibling->type() == Type::LeftSquareBracketLayout)
+        || (type() == Type::RightParenthesisLayout && sibling->type() == Type::RightParenthesisLayout)
+        || (type() == Type::RightSquareBracketLayout && sibling->type() == Type::RightSquareBracketLayout))
     {
       currentNumberOfOpenBrackets++;
     }
diff --git a/poincare/src/code_point_layout.cpp b/poincare/src/code_point_layout.cpp
index 4914aecb4..254000cb1 100644
--- a/poincare/src/code_point_layout.cpp
+++ b/poincare/src/code_point_layout.cpp
@@ -49,7 +49,7 @@ bool CodePointLayoutNode::isCollapsable(int * numberOfOpenParenthesis, bool goin
         int indexOfThis = parent.indexOfChild(thisRef);
         if (indexOfThis > 0) {
           Layout leftBrother = parent.childAtIndex(indexOfThis-1);
-          if (leftBrother.isCodePoint()
+          if (leftBrother.type() == Type::CodePointLayout
               && static_cast<CodePointLayout&>(leftBrother).codePoint() == UCodePointLatinLetterSmallCapitalE)
           {
             return true;
diff --git a/poincare/src/fraction_layout.cpp b/poincare/src/fraction_layout.cpp
index 8b6c85f9c..8af85a37d 100644
--- a/poincare/src/fraction_layout.cpp
+++ b/poincare/src/fraction_layout.cpp
@@ -133,13 +133,13 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   }
 
   // Add a multiplication if omitted.
-  if (idxInParent > 0 && p->isHorizontal() && p->childAtIndex(idxInParent - 1)->canBeOmittedMultiplicationLeftFactor()) {
+  if (idxInParent > 0 && p->type() == Type::HorizontalLayout && p->childAtIndex(idxInParent - 1)->canBeOmittedMultiplicationLeftFactor()) {
     numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, UCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
 
   bool addParenthesis = false;
-  if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->isHorizontal() && p->childAtIndex(idxInParent + 1)->isVerticalOffset()) {
+  if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->type() == Type::HorizontalLayout && p->childAtIndex(idxInParent + 1)->type() == Type::VerticalOffsetLayout) {
     addParenthesis = true;
     // Add parenthesis
     numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, '(');
@@ -157,7 +157,7 @@ int FractionLayoutNode::serialize(char * buffer, int bufferSize, Preferences::Pr
   }
 
   // Add a multiplication if omitted.
-  if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->isHorizontal() && p->childAtIndex(idxInParent + 1)->canBeOmittedMultiplicationRightFactor()) {
+  if (idxInParent >= 0 && idxInParent < (p->numberOfChildren() - 1) && p->type() == Type::HorizontalLayout && p->childAtIndex(idxInParent + 1)->canBeOmittedMultiplicationRightFactor()) {
     numberOfChar+= SerializationHelper::CodePoint(buffer + numberOfChar, bufferSize - numberOfChar, UCodePointMiddleDot);
     if (numberOfChar >= bufferSize-1) { return bufferSize-1;}
   }
diff --git a/poincare/src/horizontal_layout.cpp b/poincare/src/horizontal_layout.cpp
index 10dc63766..475ab8737 100644
--- a/poincare/src/horizontal_layout.cpp
+++ b/poincare/src/horizontal_layout.cpp
@@ -309,7 +309,7 @@ bool HorizontalLayoutNode::willReplaceChild(LayoutNode * oldChild, LayoutNode *
   /* If the new child is also an horizontal layout, steal the children of the
    * new layout then destroy it. */
   bool oldWasAncestorOfNewLayout = newChild->hasAncestor(oldChild, false);
-  if (newChild->isHorizontal()) {
+  if (newChild->type() == LayoutNode::Type::HorizontalLayout) {
     int indexForInsertion = indexOfChild(oldChild);
     if (cursor != nullptr) {
       /* If the old layout is not an ancestor of the new layout, or if the
@@ -354,7 +354,7 @@ bool HorizontalLayoutNode::willReplaceChild(LayoutNode * oldChild, LayoutNode *
 // HorizontalLayout
 
 void HorizontalLayout::addOrMergeChildAtIndex(Layout l, int index, bool removeEmptyChildren, LayoutCursor * cursor) {
-  if (l.isHorizontal()) {
+  if (l.type() == LayoutNode::Type::HorizontalLayout) {
     mergeChildrenAtIndex(HorizontalLayout(static_cast<HorizontalLayoutNode *>(l.node())), index, removeEmptyChildren, cursor);
   } else {
     addChildAtIndex(l, index, numberOfChildren(), cursor, removeEmptyChildren);
diff --git a/poincare/src/layout.cpp b/poincare/src/layout.cpp
index 1aef45379..333e0441a 100644
--- a/poincare/src/layout.cpp
+++ b/poincare/src/layout.cpp
@@ -94,7 +94,7 @@ void Layout::replaceWith(Layout newChild, LayoutCursor * cursor) {
 void Layout::replaceWithJuxtapositionOf(Layout leftChild, Layout rightChild, LayoutCursor * cursor, bool putCursorInTheMiddle) {
   Layout p = parent();
   assert(!p.isUninitialized());
-  if (!p.isHorizontal()) {
+  if (p.type() != LayoutNode::Type::HorizontalLayout) {
     /* One of the children to juxtapose might be "this", so we cannot just call
      * replaceWith. */
     HorizontalLayout horizontalLayoutR = HorizontalLayout::Builder();
@@ -166,21 +166,21 @@ void Layout::addSibling(LayoutCursor * cursor, Layout sibling, bool moveCursor)
   Layout rootLayout = root();
   Layout p = parent();
   assert(!p.isUninitialized());
-  if (p.isHorizontal()) {
+  if (p.type() == LayoutNode::Type::HorizontalLayout) {
     int indexInParent = p.indexOfChild(*this);
     int siblingIndex = cursor->position() == LayoutCursor::Position::Left ? indexInParent : indexInParent + 1;
 
     /* Special case: If the neighbour sibling is a VerticalOffsetLayout, let it
      * handle the insertion of the new sibling. Do not enter the special case if
      * "this" is a VerticalOffsetLayout, to avoid an infinite loop. */
-    if (!isVerticalOffset()) {
+    if (type() != LayoutNode::Type::VerticalOffsetLayout) {
       Layout neighbour;
       if (cursor->position() == LayoutCursor::Position::Left && indexInParent > 0) {
         neighbour = p.childAtIndex(indexInParent - 1);
       } else if (cursor->position() == LayoutCursor::Position::Right && indexInParent < p.numberOfChildren() - 1) {
         neighbour = p.childAtIndex(indexInParent + 1);
       }
-      if (!neighbour.isUninitialized() && neighbour.isVerticalOffset()) {
+      if (!neighbour.isUninitialized() && neighbour.type() == LayoutNode::Type::VerticalOffsetLayout) {
         if (moveCursor) {
           cursor->setLayout(neighbour);
           cursor->setPosition(cursor->position() == LayoutCursor::Position::Left ? LayoutCursor::Position::Right : LayoutCursor::Position::Left);
@@ -234,7 +234,7 @@ void  Layout::removeChildAtIndex(int index, LayoutCursor * cursor, bool force) {
 
 void Layout::collapseOnDirection(HorizontalDirection direction, int absorbingChildIndex) {
   Layout p = parent();
-  if (p.isUninitialized() || !p.isHorizontal()) {
+  if (p.isUninitialized() || p.type() != LayoutNode::Type::HorizontalLayout) {
     return;
   }
   int idxInParent = p.indexOfChild(*this);
@@ -242,7 +242,7 @@ void Layout::collapseOnDirection(HorizontalDirection direction, int absorbingChi
   int numberOfOpenParenthesis = 0;
   bool canCollapse = true;
   Layout absorbingChild = childAtIndex(absorbingChildIndex);
-  if (absorbingChild.isUninitialized() || !absorbingChild.isHorizontal()) {
+  if (absorbingChild.isUninitialized() || absorbingChild.type() != LayoutNode::Type::HorizontalLayout) {
     return;
   }
   HorizontalLayout horizontalAbsorbingChild = HorizontalLayout(static_cast<HorizontalLayoutNode *>(absorbingChild.node()));
@@ -285,7 +285,7 @@ void Layout::collapseSiblings(LayoutCursor * cursor) {
   Layout rootLayout = root();
   if (node()->shouldCollapseSiblingsOnRight()) {
     Layout absorbingChild = childAtIndex(rightCollapsingAbsorbingChildIndex());
-    if (!absorbingChild.isHorizontal()) {
+    if (absorbingChild.type() != LayoutNode::Type::HorizontalLayout) {
       Layout horRef = HorizontalLayout::Builder();
       replaceChild(absorbingChild, horRef, cursor, true);
       horRef.addChildAtIndexInPlace(absorbingChild, 0, 0);
@@ -294,7 +294,7 @@ void Layout::collapseSiblings(LayoutCursor * cursor) {
   }
   if (node()->shouldCollapseSiblingsOnLeft()) {
     Layout absorbingChild = childAtIndex(leftCollapsingAbsorbingChildIndex());
-    if (!absorbingChild.isHorizontal()) {
+    if (absorbingChild.type() != LayoutNode::Type::HorizontalLayout) {
       Layout horRef = HorizontalLayout::Builder();
       replaceChild(absorbingChild, horRef, cursor, true);
       horRef.addChildAtIndexInPlace(absorbingChild, 0, 0);
diff --git a/poincare/src/layout_cursor.cpp b/poincare/src/layout_cursor.cpp
index 234d35b14..686405c13 100644
--- a/poincare/src/layout_cursor.cpp
+++ b/poincare/src/layout_cursor.cpp
@@ -190,7 +190,7 @@ void LayoutCursor::insertText(const char * text) {
 }
 
 void LayoutCursor::addLayoutAndMoveCursor(Layout l) {
-  bool layoutWillBeMerged = l.isHorizontal();
+  bool layoutWillBeMerged = l.type() == LayoutNode::Type::HorizontalLayout;
   m_layout.addSibling(this, l, true);
   if (!layoutWillBeMerged) {
     l.collapseSiblings(this);
@@ -199,7 +199,7 @@ void LayoutCursor::addLayoutAndMoveCursor(Layout l) {
 
 void LayoutCursor::clearLayout() {
   Layout rootLayoutR = m_layout.root();
-  assert(rootLayoutR.isHorizontal());
+  assert(rootLayoutR.type() == LayoutNode::Type::HorizontalLayout);
   rootLayoutR.removeChildrenInPlace(rootLayoutR.numberOfChildren());
   m_layout = rootLayoutR;
 }
@@ -239,10 +239,10 @@ bool LayoutCursor::baseForNewPowerLayout() {
    * be the base of a new power layout: the base layout should be anything but
    * an horizontal layout with no child. */
   if (m_position == Position::Right) {
-    return !(m_layout.isHorizontal() && m_layout.numberOfChildren() == 0);
+    return !(m_layout.type() == LayoutNode::Type::HorizontalLayout && m_layout.numberOfChildren() == 0);
   } else {
     assert(m_position == Position::Left);
-    if (m_layout.isHorizontal()) {
+    if (m_layout.type() == LayoutNode::Type::HorizontalLayout) {
       return false;
     }
     if (m_layout.isEmpty()) {
@@ -254,7 +254,7 @@ bool LayoutCursor::baseForNewPowerLayout() {
     }
     LayoutCursor equivalentLayoutCursor = m_layout.equivalentCursor(this);
     if (equivalentLayoutCursor.layoutReference().isUninitialized()
-        || (equivalentLayoutCursor.layoutReference().isHorizontal()
+        || (equivalentLayoutCursor.layoutReference().type() == LayoutNode::Type::HorizontalLayout
           && equivalentLayoutCursor.position() == Position::Left))
     {
       return false;
@@ -285,7 +285,7 @@ bool LayoutCursor::privateShowHideEmptyLayoutIfNeeded(bool show) {
   /* Change the visibility of the neighbouring empty layout: it might be either
    * an EmptyLayout or an HorizontalLayout with one child only, and this child
    * is an EmptyLayout. */
-  if (adjacentEmptyLayout.isHorizontal()) {
+  if (adjacentEmptyLayout.type() == LayoutNode::Type::HorizontalLayout) {
     static_cast<EmptyLayoutNode *>(adjacentEmptyLayout.childAtIndex(0).node())->setVisible(show);
   } else {
     static_cast<EmptyLayoutNode *>(adjacentEmptyLayout.node())->setVisible(show);
diff --git a/poincare/src/layout_node.cpp b/poincare/src/layout_node.cpp
index 53f80eba5..60818e3ac 100644
--- a/poincare/src/layout_node.cpp
+++ b/poincare/src/layout_node.cpp
@@ -215,7 +215,7 @@ bool LayoutNode::changeGreySquaresOfAllMatrixAncestors(bool add) {
   bool changedSquares = false;
   Layout currentAncestor = Layout(parent());
   while (!currentAncestor.isUninitialized()) {
-    if (currentAncestor.isMatrix()) {
+    if (currentAncestor.type() == Type::MatrixLayout) {
       if (add) {
         MatrixLayout(static_cast<MatrixLayoutNode *>(currentAncestor.node())).addGreySquares();
       } else {
diff --git a/poincare/src/matrix_layout.cpp b/poincare/src/matrix_layout.cpp
index 659b3682f..d390eea1e 100644
--- a/poincare/src/matrix_layout.cpp
+++ b/poincare/src/matrix_layout.cpp
@@ -180,7 +180,7 @@ void MatrixLayoutNode::newRowOrColumnAtIndex(int index) {
       }
       if (childIndex % m_numberOfColumns == correspondingColumn) {
         if (lastLayoutOfRow->isEmpty()) {
-          if (!lastLayoutOfRow->isHorizontal()) {
+          if (lastLayoutOfRow->type() != Type::HorizontalLayout) {
             static_cast<EmptyLayoutNode *>(lastLayoutOfRow)->setColor(EmptyLayoutNode::Color::Yellow);
           } else {
             assert(lastLayoutOfRow->numberOfChildren() == 1);
@@ -203,7 +203,7 @@ void MatrixLayoutNode::newRowOrColumnAtIndex(int index) {
         break;
       }
       if (lastLayoutOfColumn->isEmpty()) {
-        if (!lastLayoutOfColumn->isHorizontal()) {
+        if (lastLayoutOfColumn->type() != Type::HorizontalLayout) {
           static_cast<EmptyLayoutNode *>(lastLayoutOfColumn)->setColor(EmptyLayoutNode::Color::Yellow);
         } else {
           assert(lastLayoutOfColumn->numberOfChildren() == 1);
@@ -253,7 +253,7 @@ bool MatrixLayoutNode::hasGreySquares() const {
   }
   LayoutNode * lastChild = const_cast<MatrixLayoutNode *>(this)->childAtIndex(m_numberOfRows * m_numberOfColumns - 1);
   if (lastChild->isEmpty()
-      && !lastChild->isHorizontal()
+      && lastChild->type() != Type::HorizontalLayout
       && (static_cast<EmptyLayoutNode *>(lastChild))->color() == EmptyLayoutNode::Color::Grey)
   {
     assert(isRowEmpty(m_numberOfRows - 1));
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 03077a5b3..8db4a472e 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -192,7 +192,7 @@ KDSize VerticalOffsetLayoutNode::computeSize() {
   if (m_position == Position::Superscript) {
     LayoutNode * parentNode = parent();
     assert(parentNode != nullptr);
-    assert(parentNode->isHorizontal());
+    assert(parentNode->type() == Type::HorizontalLayout);
     int idxInParent = parentNode->indexOfChild(this);
     if (idxInParent < parentNode->numberOfChildren() - 1 && parentNode->childAtIndex(idxInParent + 1)->hasUpperLeftIndex()) {
       width += k_separationMargin;
@@ -220,13 +220,13 @@ KDPoint VerticalOffsetLayoutNode::positionOfChild(LayoutNode * child) {
 }
 
 bool VerticalOffsetLayoutNode::willAddSibling(LayoutCursor * cursor, LayoutNode * sibling, bool moveCursor) {
-  if (sibling->isVerticalOffset()) {
+  if (sibling->type() == Type::VerticalOffsetLayout) {
     VerticalOffsetLayoutNode * verticalOffsetSibling = static_cast<VerticalOffsetLayoutNode *>(sibling);
     if (verticalOffsetSibling->position() == Position::Superscript) {
       Layout rootLayout = root();
       Layout thisRef = Layout(this);
       Layout parentRef = Layout(parent());
-      assert(parentRef.isHorizontal());
+      assert(parentRef.type() == Type::HorizontalLayout);
       // Add the Left parenthesis
       int idxInParent = parentRef.indexOfChild(thisRef);
       int leftParenthesisIndex = idxInParent;
@@ -259,7 +259,7 @@ bool VerticalOffsetLayoutNode::willAddSibling(LayoutCursor * cursor, LayoutNode
 LayoutNode * VerticalOffsetLayoutNode::baseLayout() {
   LayoutNode * parentNode = parent();
   assert(parentNode != nullptr);
-  assert(parentNode->isHorizontal());
+  assert(parentNode->type() == Type::HorizontalLayout);
   int idxInParent = parentNode->indexOfChild(this);
   assert(idxInParent > 0);
   return parentNode->childAtIndex(idxInParent - 1);

From 5590c23edf5440a89fbe3b34ddcd7b269fef0438 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 11:51:42 +0200
Subject: [PATCH 219/295] [poincare] Layout: implement isIdenticalTo

---
 poincare/include/poincare/code_point_layout.h |  1 +
 poincare/include/poincare/empty_layout.h      |  1 +
 poincare/include/poincare/layout.h            |  1 +
 poincare/include/poincare/layout_node.h       |  3 ++
 poincare/include/poincare/nth_root_layout.h   |  1 +
 .../include/poincare/vertical_offset_layout.h |  1 +
 poincare/src/code_point_layout.cpp            |  8 +++++
 poincare/src/empty_layout.cpp                 |  8 +++++
 poincare/src/layout_node.cpp                  | 13 ++++++++
 poincare/src/nth_root_layout.cpp              |  8 +++++
 poincare/src/vertical_offset_layout.cpp       |  8 +++++
 poincare/test/layouts.cpp                     | 33 +++++++++++++++++++
 12 files changed, 86 insertions(+)

diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index e2415325b..fd765bc93 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -22,6 +22,7 @@ public:
 
   // Layout
   Type type() const override { return Type::CodePointLayout; }
+  bool isIdenticalTo(Layout l) override;
 
   // CodePointLayout
   CodePoint codePoint() const { return m_codePoint; }
diff --git a/poincare/include/poincare/empty_layout.h b/poincare/include/poincare/empty_layout.h
index 2b8a7ccea..b3fe6a6d8 100644
--- a/poincare/include/poincare/empty_layout.h
+++ b/poincare/include/poincare/empty_layout.h
@@ -15,6 +15,7 @@ public:
 
   // Layout
   Type type() const override { return Type::EmptyLayout; }
+  bool isIdenticalTo(Layout l) override;
 
   EmptyLayoutNode(Color color = Color::Yellow, bool visible = true, const KDFont * font = KDFont::LargeFont, bool margins = true) :
     LayoutNode(),
diff --git a/poincare/include/poincare/layout.h b/poincare/include/poincare/layout.h
index c035096ec..8aa19ad4e 100644
--- a/poincare/include/poincare/layout.h
+++ b/poincare/include/poincare/layout.h
@@ -26,6 +26,7 @@ public:
 
   // Properties
   LayoutNode::Type type() const { return node()->type(); }
+  bool isIdenticalTo(Layout l) { return isUninitialized() ? l.isUninitialized() : node()->isIdenticalTo(l); }
 
   // Rendering
   void draw(KDContext * ctx, KDPoint p, KDColor expressionColor = KDColorBlack, KDColor backgroundColor = KDColorWhite) {
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index b667d5d30..297fa85d8 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -55,6 +55,9 @@ public:
   /* Poor man's RTTI */
   virtual Type type() const = 0;
 
+  // Comparison
+  virtual bool isIdenticalTo(Layout l);
+
   // Rendering
   void draw(KDContext * ctx, KDPoint p, KDColor expressionColor = KDColorBlack, KDColor backgroundColor = KDColorWhite);
   KDPoint origin();
diff --git a/poincare/include/poincare/nth_root_layout.h b/poincare/include/poincare/nth_root_layout.h
index 6f95eb970..3b19fd2d0 100644
--- a/poincare/include/poincare/nth_root_layout.h
+++ b/poincare/include/poincare/nth_root_layout.h
@@ -21,6 +21,7 @@ public:
 
   // Layout
   Type type() const override { return Type::NthRootLayout; }
+  bool isIdenticalTo(Layout l) override;
 
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
diff --git a/poincare/include/poincare/vertical_offset_layout.h b/poincare/include/poincare/vertical_offset_layout.h
index 77977a860..b3ef24c5a 100644
--- a/poincare/include/poincare/vertical_offset_layout.h
+++ b/poincare/include/poincare/vertical_offset_layout.h
@@ -20,6 +20,7 @@ public:
 
   // Layout
   Type type() const override { return Type::VerticalOffsetLayout; }
+  bool isIdenticalTo(Layout l) override;
 
   // VerticalOffsetLayoutNode
   Position position() const { return m_position; }
diff --git a/poincare/src/code_point_layout.cpp b/poincare/src/code_point_layout.cpp
index 254000cb1..38dd16b0e 100644
--- a/poincare/src/code_point_layout.cpp
+++ b/poincare/src/code_point_layout.cpp
@@ -4,6 +4,14 @@
 
 namespace Poincare {
 
+bool CodePointLayoutNode::isIdenticalTo(Layout l) {
+  if (l.type() != Type::CodePointLayout) {
+    return false;
+  }
+  CodePointLayout & cpl = static_cast<CodePointLayout &>(l);
+  return codePoint() == cpl.codePoint() && font() == cpl.font();
+}
+
 // LayoutNode
 void CodePointLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->position() == LayoutCursor::Position::Right) {
diff --git a/poincare/src/empty_layout.cpp b/poincare/src/empty_layout.cpp
index 4bed5b777..b9a02747f 100644
--- a/poincare/src/empty_layout.cpp
+++ b/poincare/src/empty_layout.cpp
@@ -5,6 +5,14 @@
 
 namespace Poincare {
 
+bool EmptyLayoutNode::isIdenticalTo(Layout l) {
+  if (l.type() != Type::EmptyLayout) {
+    return false;
+  }
+  EmptyLayoutNode * n = static_cast<EmptyLayoutNode *>(l.node());
+  return color() == n->color();
+}
+
 void EmptyLayoutNode::deleteBeforeCursor(LayoutCursor * cursor) {
   cursor->setPosition(LayoutCursor::Position::Left);
   LayoutNode * p = parent();
diff --git a/poincare/src/layout_node.cpp b/poincare/src/layout_node.cpp
index 60818e3ac..1132300fe 100644
--- a/poincare/src/layout_node.cpp
+++ b/poincare/src/layout_node.cpp
@@ -7,6 +7,19 @@
 
 namespace Poincare {
 
+bool LayoutNode::isIdenticalTo(Layout l) {
+  if (l.isUninitialized() || type() != l.type() || numberOfChildren() != l.numberOfChildren()) {
+    return false;
+  }
+  for (int i = 0; i < numberOfChildren(); i++) {
+    Layout child = childAtIndex(i);
+    if (!childAtIndex(i)->isIdenticalTo(l.childAtIndex(i))) {
+      return false;
+    }
+  }
+  return true;
+}
+
 // Rendering
 
 void LayoutNode::draw(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index c689064d0..62beeb8af 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -20,6 +20,14 @@ const uint8_t radixPixel[NthRootLayoutNode::k_leftRadixHeight][NthRootLayoutNode
   {0xFF, 0xFF, 0xFF, 0xFF, 0x00},
 };
 
+bool NthRootLayoutNode::isIdenticalTo(Layout l) {
+  if (l.type() != Type::NthRootLayout) {
+    return false;
+  }
+  NthRootLayout & nrl = static_cast<NthRootLayout &>(l);
+  return hasUpperLeftIndex() == nrl.node()->hasUpperLeftIndex() && LayoutNode::isIdenticalTo(l);
+}
+
 void NthRootLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == radicandLayout()
     && cursor->position() == LayoutCursor::Position::Left)
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 8db4a472e..4aaad5bc1 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -8,6 +8,14 @@
 
 namespace Poincare {
 
+bool VerticalOffsetLayoutNode::isIdenticalTo(Layout l) {
+  if (l.type() != Type::VerticalOffsetLayout) {
+    return false;
+  }
+  VerticalOffsetLayoutNode * n = static_cast<VerticalOffsetLayoutNode *>(l.node());
+  return position() == n->position() && LayoutNode::isIdenticalTo(l);
+}
+
 void VerticalOffsetLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == indiceLayout()
       && cursor->position() == LayoutCursor::Position::Left)
diff --git a/poincare/test/layouts.cpp b/poincare/test/layouts.cpp
index 36c613be3..37e55e170 100644
--- a/poincare/test/layouts.cpp
+++ b/poincare/test/layouts.cpp
@@ -273,3 +273,36 @@ QUIZ_CASE(poincare_parse_layouts) {
   assert_parsed_expression_is("2ℯ^(3)", Multiplication::Builder(Rational::Builder(2),Power::Builder(Constant::Builder(UCodePointScriptSmallE),Parenthesis::Builder(Rational::Builder(3)))));
   assert_parsed_layout_is(l, e);
 }
+
+QUIZ_CASE(poincare_layouts_comparison) {
+  Layout e0 = CodePointLayout::Builder('a');
+  Layout e1 = CodePointLayout::Builder('a');
+  Layout e2 = CodePointLayout::Builder('b');
+  quiz_assert(e0.isIdenticalTo(e1));
+  quiz_assert(!e0.isIdenticalTo(e2));
+
+  Layout e3 = EmptyLayout::Builder();
+  Layout e4 = EmptyLayout::Builder();
+  quiz_assert(e3.isIdenticalTo(e4));
+  quiz_assert(!e3.isIdenticalTo(e0));
+
+  Layout e5 = NthRootLayout::Builder(e0);
+  Layout e6 = NthRootLayout::Builder(e1);
+  Layout e7 = NthRootLayout::Builder(e2);
+  quiz_assert(e5.isIdenticalTo(e6));
+  quiz_assert(!e5.isIdenticalTo(e7));
+  quiz_assert(!e5.isIdenticalTo(e0));
+
+  Layout e8 = VerticalOffsetLayout::Builder(e5, VerticalOffsetLayoutNode::Position::Superscript);
+  Layout e9 = VerticalOffsetLayout::Builder(e6, VerticalOffsetLayoutNode::Position::Superscript);
+  Layout e10 = VerticalOffsetLayout::Builder(NthRootLayout::Builder(CodePointLayout::Builder('a')), VerticalOffsetLayoutNode::Position::Subscript);
+  quiz_assert(e8.isIdenticalTo(e9));
+  quiz_assert(!e8.isIdenticalTo(e10));
+  quiz_assert(!e8.isIdenticalTo(e0));
+
+  Layout e11 = SumLayout::Builder(e0, e3, e6, e2);
+  Layout e12 = SumLayout::Builder(CodePointLayout::Builder('a'), EmptyLayout::Builder(), NthRootLayout::Builder(CodePointLayout::Builder('a')), CodePointLayout::Builder('b'));
+  Layout e13 = ProductLayout::Builder(CodePointLayout::Builder('a'), EmptyLayout::Builder(), NthRootLayout::Builder(CodePointLayout::Builder('a')), CodePointLayout::Builder('b'));
+  quiz_assert(e11.isIdenticalTo(e12));
+  quiz_assert(!e11.isIdenticalTo(e13));
+}

From c1a0e94ec79e3f208724689ea7d3e8880dc0acb1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 13:44:39 +0200
Subject: [PATCH 220/295] [escher] Clean empty lines

---
 escher/include/escher/scrollable_view.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/escher/include/escher/scrollable_view.h b/escher/include/escher/scrollable_view.h
index 6d82205e3..4f1996461 100644
--- a/escher/include/escher/scrollable_view.h
+++ b/escher/include/escher/scrollable_view.h
@@ -15,5 +15,3 @@ protected:
 };
 
 #endif
-
-

From 5e280c7538b11321141fc3c3ab6942e951514d6e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 13:46:57 +0200
Subject: [PATCH 221/295] [escher] ExpressionView: optimize setLayouts to avoid
 marking the whole view as dirty when the layout did not really changed

---
 .../scrollable_exact_approximate_expressions_view.cpp     | 8 +++++---
 escher/include/escher/expression_view.h                   | 2 +-
 escher/src/expression_view.cpp                            | 6 +++++-
 escher/src/layout_field.cpp                               | 5 +++--
 4 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index f0e0831f3..98bbc4d91 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -114,9 +114,11 @@ ScrollableExactApproximateExpressionsView::ScrollableExactApproximateExpressions
 }
 
 void ScrollableExactApproximateExpressionsView::setLayouts(Poincare::Layout rightLayout, Poincare::Layout leftLayout) {
-  m_contentCell.rightExpressionView()->setLayout(rightLayout);
-  m_contentCell.leftExpressionView()->setLayout(leftLayout);
-  m_contentCell.layoutSubviews();
+  bool updateRightLayout = m_contentCell.rightExpressionView()->setLayout(rightLayout);
+  bool updateLeftLayout = m_contentCell.leftExpressionView()->setLayout(leftLayout);
+  if (updateRightLayout || updateLeftLayout) {
+    m_contentCell.layoutSubviews();
+  }
 }
 
 void ScrollableExactApproximateExpressionsView::setEqualMessage(I18n::Message equalSignMessage) {
diff --git a/escher/include/escher/expression_view.h b/escher/include/escher/expression_view.h
index 0a1bdb7fe..b11ea2db6 100644
--- a/escher/include/escher/expression_view.h
+++ b/escher/include/escher/expression_view.h
@@ -16,7 +16,7 @@ public:
   ExpressionView(float horizontalAlignment = 0.0f, float verticalAlignment = 0.5f,
     KDColor textColor = KDColorBlack, KDColor backgroundColor = KDColorWhite);
   Poincare::Layout layout() const { return m_layout; }
-  void setLayout(Poincare::Layout layout);
+  bool setLayout(Poincare::Layout layout);
   void drawRect(KDContext * ctx, KDRect rect) const override;
   void setBackgroundColor(KDColor backgroundColor);
   void setTextColor(KDColor textColor);
diff --git a/escher/src/expression_view.cpp b/escher/src/expression_view.cpp
index 6360470f8..64cf5c47f 100644
--- a/escher/src/expression_view.cpp
+++ b/escher/src/expression_view.cpp
@@ -14,9 +14,13 @@ ExpressionView::ExpressionView(float horizontalAlignment, float verticalAlignmen
 {
 }
 
-void ExpressionView::setLayout(Layout layoutR) {
+bool ExpressionView::setLayout(Layout layoutR) {
+  if (m_layout.isIdenticalTo(layoutR)) {
+    return false;
+  }
   m_layout = layoutR;
   markRectAsDirty(bounds());
+  return true;
 }
 
 void ExpressionView::setBackgroundColor(KDColor backgroundColor) {
diff --git a/escher/src/layout_field.cpp b/escher/src/layout_field.cpp
index 1b6e030e6..a25088ef0 100644
--- a/escher/src/layout_field.cpp
+++ b/escher/src/layout_field.cpp
@@ -28,8 +28,9 @@ void LayoutField::ContentView::setEditing(bool isEditing) {
 
 void LayoutField::ContentView::clearLayout() {
   HorizontalLayout h = HorizontalLayout::Builder();
-  m_expressionView.setLayout(h);
-  m_cursor.setLayout(h);
+  if (m_expressionView.setLayout(h)) {
+    m_cursor.setLayout(h);
+  }
 }
 
 KDSize LayoutField::ContentView::minimalSizeForOptimalDisplay() const {

From 39c53b5e8bed5bb1d0149a10e83699e8f2792ebc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 13:52:50 +0200
Subject: [PATCH 222/295] [calculation] HistoryViewCell: memoize calculation
 and cell selection to speed up navigation in HistoryController

---
 apps/calculation/history_view_cell.cpp | 10 ++++++++--
 apps/calculation/history_view_cell.h   |  1 +
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 3310771c5..1f8d915a9 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -28,6 +28,7 @@ void HistoryViewCellDataSource::setSelectedSubviewType(SubviewType subviewType,
 HistoryViewCell::HistoryViewCell(Responder * parentResponder) :
   Responder(parentResponder),
   m_calculation(),
+  m_calculationSelected(false),
   m_inputView(this),
   m_scrollableOutputView(this)
 {
@@ -120,15 +121,20 @@ void HistoryViewCell::layoutSubviews() {
 }
 
 void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected) {
+  if (m_calculationSelected == isSelected && *calculation == m_calculation) {
+    return;
+  }
+  // Memoization
   m_calculation = *calculation;
-  m_inputView.setLayout(calculation->createInputLayout());
+  m_calculationSelected = isSelected;
   App * calculationApp = (App *)app();
+  Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
+  m_inputView.setLayout(calculation->createInputLayout());
   /* Both output expressions have to be updated at the same time. Otherwise,
    * when updating one layout, if the second one still points to a deleted
    * layout, calling to layoutSubviews() would fail. */
   Poincare::Layout leftOutputLayout = Poincare::Layout();
   Poincare::Layout rightOutputLayout;
-  Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
   if (display == Calculation::DisplayOutput::ExactOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !isSelected && calculation->toggleDisplayExact())) {
     rightOutputLayout = calculation->createExactOutputLayout();
   } else {
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index d106ce922..e9d9639ff 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -50,6 +50,7 @@ public:
 private:
   constexpr static KDCoordinate k_resultWidth = 80;
   Calculation m_calculation;
+  bool m_calculationSelected;
   ScrollableExpressionView m_inputView;
   Shared::ScrollableExactApproximateExpressionsView m_scrollableOutputView;
   HistoryViewCellDataSource * m_dataSource;

From 05a235803fa4eaae22acebe4cfdff3e1924763b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 15:19:54 +0200
Subject: [PATCH 223/295] [calculation] HistoryViewCell: fix scroll reloading
 and right or left outputs selection (the order of events here matters)

---
 apps/calculation/history_controller.cpp       |  7 ++---
 apps/calculation/history_view_cell.cpp        | 26 ++++++++++++-------
 apps/calculation/history_view_cell.h          |  1 +
 ...ble_exact_approximate_expressions_view.cpp | 19 ++++++--------
 ...lable_exact_approximate_expressions_view.h |  5 +++-
 5 files changed, 33 insertions(+), 25 deletions(-)

diff --git a/apps/calculation/history_controller.cpp b/apps/calculation/history_controller.cpp
index c3a5e1caf..90696bd6d 100644
--- a/apps/calculation/history_controller.cpp
+++ b/apps/calculation/history_controller.cpp
@@ -109,12 +109,13 @@ void HistoryController::tableViewDidChangeSelection(SelectableTableView * t, int
   if (previousSelectedCellY == selectedRow()) {
     return;
   }
+  HistoryViewCell * cell = static_cast<HistoryViewCell *>(t->selectedCell());
   if (previousSelectedCellY == -1) {
-    setSelectedSubviewType(SubviewType::Output);
+    setSelectedSubviewType(SubviewType::Output, cell);
   } else if (selectedRow() < previousSelectedCellY) {
-    setSelectedSubviewType(SubviewType::Output);
+    setSelectedSubviewType(SubviewType::Output, cell);
   } else if (selectedRow() > previousSelectedCellY) {
-    setSelectedSubviewType(SubviewType::Input);
+    setSelectedSubviewType(SubviewType::Input, cell);
   }
   HistoryViewCell * selectedCell = (HistoryViewCell *)(t->selectedCell());
   if (selectedCell == nullptr) {
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 1f8d915a9..1988fcd6b 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -19,6 +19,7 @@ void HistoryViewCellDataSource::setSelectedSubviewType(SubviewType subviewType,
   m_selectedSubviewType = subviewType;
   if (cell) {
     cell->setHighlighted(cell->isHighlighted());
+    cell->cellDidSelectSubview(subviewType);
   }
   historyViewCellDidChangeSelection();
 }
@@ -72,18 +73,23 @@ void HistoryViewCell::reloadCell() {
   m_scrollableOutputView.evenOddCell()->reloadCell();
   layoutSubviews();
 
-  // Reload input scroll
+  // Reload subviews' scrolls
   m_inputView.reloadScroll();
+  m_scrollableOutputView.reloadScroll();
+}
 
-  /* Select the right output according to the calculation display output. This
-   * will reload the scroll to display the selected output. */
-  App * calculationApp = (App *)app();
-  Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
-  if (display == Calculation::DisplayOutput::ExactAndApproximate) {
-    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
-  } else {
-  assert(display == Calculation::DisplayOutput::ApproximateOnly || display == Calculation::DisplayOutput::ExactAndApproximateToggle || display == Calculation::DisplayOutput::ExactOnly);
-    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
+void HistoryViewCell::cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type) {
+  if (type == HistoryViewCellDataSource::SubviewType::Output) {
+    /* Select the right output according to the calculation display output. This
+     * will reload the scroll to display the selected output. */
+    App * calculationApp = (App *)app();
+    Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
+    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
+      m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
+    } else {
+      assert(display == Calculation::DisplayOutput::ApproximateOnly || display == Calculation::DisplayOutput::ExactAndApproximateToggle || display == Calculation::DisplayOutput::ExactOnly);
+      m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
+    }
   }
 }
 
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index e9d9639ff..79c7264c8 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -31,6 +31,7 @@ class HistoryViewCell : public ::EvenOddCell, public Responder {
 public:
   HistoryViewCell(Responder * parentResponder = nullptr);
   void reloadCell() override;
+  void cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type);
   void setEven(bool even) override;
   void setHighlighted(bool highlight) override;
   void setDataSource(HistoryViewCellDataSource * dataSource) { m_dataSource = dataSource; }
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index 98bbc4d91..ebbf41791 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -125,16 +125,13 @@ void ScrollableExactApproximateExpressionsView::setEqualMessage(I18n::Message eq
   m_contentCell.approximateSign()->setMessage(equalSignMessage);
 }
 
-void ScrollableExactApproximateExpressionsView::setSelectedSubviewPosition(SubviewPosition subviewPosition, bool scrollToSelection) {
-  m_contentCell.setSelectedSubviewPosition(subviewPosition);
-  if (scrollToSelection) {
-    if (subviewPosition == SubviewPosition::Left) {
-      // Scroll to the left extremity
-      reloadScroll();
-    } else {
-      // Scroll to the right extremity
-      scrollToContentPoint(KDPoint(m_contentCell.bounds().width(), 0), true);
-    }
+void ScrollableExactApproximateExpressionsView::reloadScroll() {
+  if (selectedSubviewPosition() == SubviewPosition::Left) {
+    // Scroll to the left extremity
+    ScrollableView::reloadScroll();
+  } else {
+    // Scroll to the right extremity
+    scrollToContentPoint(KDPoint(m_contentCell.bounds().width(), 0), true);
   }
 }
 
@@ -157,7 +154,7 @@ bool ScrollableExactApproximateExpressionsView::handleEvent(Ion::Events::Event e
   if ((event == Ion::Events::Right && selectedSubviewPosition() == SubviewPosition::Left && rightExpressionIsVisible) ||
     (event == Ion::Events::Left && selectedSubviewPosition() == SubviewPosition::Right && leftExpressionIsVisible)) {
     SubviewPosition otherSubviewPosition = selectedSubviewPosition() == SubviewPosition::Left ? SubviewPosition::Right : SubviewPosition::Left;
-    setSelectedSubviewPosition(otherSubviewPosition, false);
+    setSelectedSubviewPosition(otherSubviewPosition);
     return true;
   }
   return ScrollableView::handleEvent(event);
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.h b/apps/shared/scrollable_exact_approximate_expressions_view.h
index 10b581861..40ec3c59a 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.h
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.h
@@ -20,7 +20,10 @@ public:
   SubviewPosition selectedSubviewPosition() {
     return m_contentCell.selectedSubviewPosition();
   }
-  void setSelectedSubviewPosition(SubviewPosition subviewPosition, bool reloadScroll = true);
+  void setSelectedSubviewPosition(SubviewPosition subviewPosition) {
+    m_contentCell.setSelectedSubviewPosition(subviewPosition);
+  }
+  void reloadScroll();
   void didBecomeFirstResponder() override;
   bool handleEvent(Ion::Events::Event event) override;
   Poincare::Layout layout() const {

From 3f961b77052c63ac7dff470e924c9874d91ee520 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 25 Apr 2019 17:14:16 +0200
Subject: [PATCH 224/295] [calculation] HistoryViewCell: better split reload
 (highlight, scroll etc)  between willDisplayCellForIndex and
 cellDidSelectSubview

---
 apps/calculation/history_controller.cpp |  8 +++++++-
 apps/calculation/history_controller.h   |  2 +-
 apps/calculation/history_view_cell.cpp  | 25 ++++++++++++++++---------
 apps/calculation/history_view_cell.h    |  2 +-
 4 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/apps/calculation/history_controller.cpp b/apps/calculation/history_controller.cpp
index 90696bd6d..786345dfc 100644
--- a/apps/calculation/history_controller.cpp
+++ b/apps/calculation/history_controller.cpp
@@ -145,7 +145,7 @@ void HistoryController::willDisplayCellForIndex(HighlightCell * cell, int index)
   HistoryViewCell * myCell = (HistoryViewCell *)cell;
   myCell->setCalculation(m_calculationStore->calculationAtIndex(index), index == selectedRow() && selectedSubviewType() == SubviewType::Output);
   myCell->setEven(index%2 == 0);
-  myCell->reloadCell();
+  myCell->setHighlighted(myCell->isHighlighted());
 }
 
 KDCoordinate HistoryController::rowHeight(int j) {
@@ -165,4 +165,10 @@ void HistoryController::scrollToCell(int i, int j) {
   m_selectableTableView.scrollToCell(i, j);
 }
 
+void HistoryController::historyViewCellDidChangeSelection() {
+  /* Update the whole table as the height of the selected cell row might have
+   * changed. */
+  m_selectableTableView.reloadData();
+}
+
 }
diff --git a/apps/calculation/history_controller.h b/apps/calculation/history_controller.h
index a41c9d501..9486748e5 100644
--- a/apps/calculation/history_controller.h
+++ b/apps/calculation/history_controller.h
@@ -28,7 +28,7 @@ public:
   void scrollToCell(int i, int j);
 private:
   CalculationSelectableTableView * selectableTableView();
-  void historyViewCellDidChangeSelection() override { m_selectableTableView.reloadData(); }
+  void historyViewCellDidChangeSelection() override;
   constexpr static int k_maxNumberOfDisplayedRows = 5;
   CalculationSelectableTableView m_selectableTableView;
   HistoryViewCell m_calculationHistory[k_maxNumberOfDisplayedRows];
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 1988fcd6b..62c1e97d1 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -69,28 +69,30 @@ Poincare::Layout HistoryViewCell::layout() const {
   }
 }
 
-void HistoryViewCell::reloadCell() {
-  m_scrollableOutputView.evenOddCell()->reloadCell();
-  layoutSubviews();
-
-  // Reload subviews' scrolls
+void HistoryViewCell::reloadScroll() {
   m_inputView.reloadScroll();
   m_scrollableOutputView.reloadScroll();
 }
 
 void HistoryViewCell::cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type) {
+  App * calculationApp = (App *)app();
+  Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
   if (type == HistoryViewCellDataSource::SubviewType::Output) {
     /* Select the right output according to the calculation display output. This
      * will reload the scroll to display the selected output. */
-    App * calculationApp = (App *)app();
-    Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
-    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
+    if (display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && m_calculation.toggleDisplayExact())) {
       m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
     } else {
-      assert(display == Calculation::DisplayOutput::ApproximateOnly || display == Calculation::DisplayOutput::ExactAndApproximateToggle || display == Calculation::DisplayOutput::ExactOnly);
+      assert(display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !m_calculation.toggleDisplayExact()) || display == Calculation::DisplayOutput::ExactOnly);
       m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
     }
   }
+  /* The selected subview has changed. The displayed outputs might have changed.
+   * For example, for the calculation 1.2+2 --> 3.2, selecting the output would
+   * display 1.2+2 --> 16/5 = 3.2. */
+  setCalculation(&m_calculation, type == HistoryViewCellDataSource::SubviewType::Output);
+  // Reload scroll when switching from one subview to another
+  reloadScroll();
 }
 
 KDColor HistoryViewCell::backgroundColor() const {
@@ -152,6 +154,11 @@ void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected)
   m_scrollableOutputView.setLayouts(rightOutputLayout, leftOutputLayout);
   I18n::Message equalMessage = calculation->exactAndApproximateDisplayedOutputsAreEqual(calculationApp->localContext()) == Calculation::EqualSign::Equal ? I18n::Message::Equal : I18n::Message::AlmostEqual;
   m_scrollableOutputView.setEqualMessage(equalMessage);
+
+  /* The displayed input and outputs have changed. We need to re-layout the cell
+   * and re-initialize the scroll. */
+  layoutSubviews();
+  reloadScroll();
 }
 
 void HistoryViewCell::didBecomeFirstResponder() {
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index 79c7264c8..818a0225e 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -30,7 +30,6 @@ private:
 class HistoryViewCell : public ::EvenOddCell, public Responder {
 public:
   HistoryViewCell(Responder * parentResponder = nullptr);
-  void reloadCell() override;
   void cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type);
   void setEven(bool even) override;
   void setHighlighted(bool highlight) override;
@@ -50,6 +49,7 @@ public:
   Shared::ScrollableExactApproximateExpressionsView * outputView();
 private:
   constexpr static KDCoordinate k_resultWidth = 80;
+  void reloadScroll();
   Calculation m_calculation;
   bool m_calculationSelected;
   ScrollableExpressionView m_inputView;

From 12876b177f0fba8a2d0889f04a82dcb989309e25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 09:50:25 +0200
Subject: [PATCH 225/295] [calculation] Calculation: discard
 Calculation::toggleDisplayExact (this feature will be developed later)

---
 apps/calculation/calculation.cpp       | 7 +++----
 apps/calculation/calculation.h         | 3 ---
 apps/calculation/history_view_cell.cpp | 6 +++---
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index fc8f55f1a..66b7f883b 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -20,8 +20,7 @@ Calculation::Calculation() :
   m_approximateOutputText(),
   m_height(-1),
   m_selectedHeight(-1),
-  m_equalSign(EqualSign::Unknown),
-  m_toggleDisplayExact(false)
+  m_equalSign(EqualSign::Unknown)
 {
 }
 
@@ -66,10 +65,10 @@ KDCoordinate Calculation::height(Context * context, bool isSelected) {
     DisplayOutput display = displayOutput(context);
     Layout inputLayout = createInputLayout();
     KDCoordinate inputHeight = inputLayout.layoutSize().height();
-    if (display == DisplayOutput::ExactOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && m_toggleDisplayExact)) {
+    if (display == DisplayOutput::ExactOnly) {
       KDCoordinate exactOutputHeight = createExactOutputLayout().layoutSize().height();
       *memoizedHeight = inputHeight+exactOutputHeight;
-    } else if (display == DisplayOutput::ApproximateOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle && !m_toggleDisplayExact)) {
+    } else if (display == DisplayOutput::ApproximateOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle)) {
       KDCoordinate approximateOutputHeight = createApproximateOutputLayout(context).layoutSize().height();
       *memoizedHeight = inputHeight+approximateOutputHeight;
     } else {
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index ac16e8fd2..a063121a1 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -43,8 +43,6 @@ public:
   bool isEmpty();
   void tidy();
   DisplayOutput displayOutput(Poincare::Context * context);
-  bool toggleDisplayExact() const { return m_toggleDisplayExact; }
-  void setToggleDisplayExact(bool displayExact) { m_toggleDisplayExact = displayExact; }
   bool shouldOnlyDisplayExactOutput();
   EqualSign exactAndApproximateDisplayedOutputsAreEqual(Poincare::Context * context);
 private:
@@ -58,7 +56,6 @@ private:
   KDCoordinate m_height;
   KDCoordinate m_selectedHeight;
   EqualSign m_equalSign;
-  bool m_toggleDisplayExact;
 };
 
 }
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 62c1e97d1..8002ffc71 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -80,10 +80,10 @@ void HistoryViewCell::cellDidSelectSubview(HistoryViewCellDataSource::SubviewTyp
   if (type == HistoryViewCellDataSource::SubviewType::Output) {
     /* Select the right output according to the calculation display output. This
      * will reload the scroll to display the selected output. */
-    if (display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && m_calculation.toggleDisplayExact())) {
+    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
       m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
     } else {
-      assert(display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !m_calculation.toggleDisplayExact()) || display == Calculation::DisplayOutput::ExactOnly);
+      assert(display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle) || display == Calculation::DisplayOutput::ExactOnly);
       m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
     }
   }
@@ -143,7 +143,7 @@ void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected)
    * layout, calling to layoutSubviews() would fail. */
   Poincare::Layout leftOutputLayout = Poincare::Layout();
   Poincare::Layout rightOutputLayout;
-  if (display == Calculation::DisplayOutput::ExactOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && !isSelected && calculation->toggleDisplayExact())) {
+  if (display == Calculation::DisplayOutput::ExactOnly) {
     rightOutputLayout = calculation->createExactOutputLayout();
   } else {
     rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());

From a30191ccb4d9b80abf6ba216a16202c3ad39ebdb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 10:03:24 +0200
Subject: [PATCH 226/295] [calculation] Change name: 'calculation selected' -->
 'calculation expanded'

---
 apps/calculation/calculation.cpp       | 14 +++++++-------
 apps/calculation/calculation.h         |  4 ++--
 apps/calculation/history_view_cell.cpp | 10 +++++-----
 apps/calculation/history_view_cell.h   |  4 ++--
 4 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 66b7f883b..5049b817f 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -19,7 +19,7 @@ Calculation::Calculation() :
   m_exactOutputText(),
   m_approximateOutputText(),
   m_height(-1),
-  m_selectedHeight(-1),
+  m_expandedHeight(-1),
   m_equalSign(EqualSign::Unknown)
 {
 }
@@ -59,8 +59,8 @@ void Calculation::setContent(const char * c, Context * context, Expression ansEx
   PoincareHelpers::Serialize(approximateOutput, m_approximateOutputText, sizeof(m_approximateOutputText));
 }
 
-KDCoordinate Calculation::height(Context * context, bool isSelected) {
-  KDCoordinate * memoizedHeight = isSelected ? &m_selectedHeight : &m_height;
+KDCoordinate Calculation::height(Context * context, bool expanded) {
+  KDCoordinate * memoizedHeight = expanded ? &m_expandedHeight : &m_height;
   if (*memoizedHeight < 0) {
     DisplayOutput display = displayOutput(context);
     Layout inputLayout = createInputLayout();
@@ -68,11 +68,11 @@ KDCoordinate Calculation::height(Context * context, bool isSelected) {
     if (display == DisplayOutput::ExactOnly) {
       KDCoordinate exactOutputHeight = createExactOutputLayout().layoutSize().height();
       *memoizedHeight = inputHeight+exactOutputHeight;
-    } else if (display == DisplayOutput::ApproximateOnly || (!isSelected && display == DisplayOutput::ExactAndApproximateToggle)) {
+    } else if (display == DisplayOutput::ApproximateOnly || (!expanded && display == DisplayOutput::ExactAndApproximateToggle)) {
       KDCoordinate approximateOutputHeight = createApproximateOutputLayout(context).layoutSize().height();
       *memoizedHeight = inputHeight+approximateOutputHeight;
     } else {
-      assert(display == DisplayOutput::ExactAndApproximate || (display == DisplayOutput::ExactAndApproximateToggle && isSelected));
+      assert(display == DisplayOutput::ExactAndApproximate || (display == DisplayOutput::ExactAndApproximateToggle && expanded));
       Layout approximateLayout = createApproximateOutputLayout(context);
       Layout exactLayout = createExactOutputLayout();
       KDCoordinate approximateOutputHeight = approximateLayout.layoutSize().height();
@@ -85,7 +85,7 @@ KDCoordinate Calculation::height(Context * context, bool isSelected) {
      * theses cases. */
     if (display != DisplayOutput::ExactAndApproximateToggle) {
       m_height = *memoizedHeight;
-      m_selectedHeight = *memoizedHeight;
+      m_expandedHeight = *memoizedHeight;
     }
   }
   return *memoizedHeight;
@@ -128,7 +128,7 @@ bool Calculation::isEmpty() {
 void Calculation::tidy() {
   /* Uninitialized all Expression stored to free the Pool */
   m_height = -1;
-  m_selectedHeight = -1;
+  m_expandedHeight = -1;
   m_equalSign = EqualSign::Unknown;
 }
 
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index a063121a1..edc60d05d 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -30,7 +30,7 @@ public:
   /* c.reset() is the equivalent of c = Calculation() without copy assingment. */
   void reset();
   void setContent(const char * c, Poincare::Context * context, Poincare::Expression ansExpression);
-  KDCoordinate height(Poincare::Context * context, bool isSelected = false);
+  KDCoordinate height(Poincare::Context * context, bool expanded = false);
   const char * inputText();
   const char * exactOutputText();
   const char * approximateOutputText();
@@ -54,7 +54,7 @@ private:
   char m_exactOutputText[Constant::MaxSerializedExpressionSize];
   char m_approximateOutputText[Constant::MaxSerializedExpressionSize];
   KDCoordinate m_height;
-  KDCoordinate m_selectedHeight;
+  KDCoordinate m_expandedHeight;
   EqualSign m_equalSign;
 };
 
diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 8002ffc71..073af802b 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -29,7 +29,7 @@ void HistoryViewCellDataSource::setSelectedSubviewType(SubviewType subviewType,
 HistoryViewCell::HistoryViewCell(Responder * parentResponder) :
   Responder(parentResponder),
   m_calculation(),
-  m_calculationSelected(false),
+  m_calculationExpanded(false),
   m_inputView(this),
   m_scrollableOutputView(this)
 {
@@ -128,13 +128,13 @@ void HistoryViewCell::layoutSubviews() {
   ));
 }
 
-void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected) {
-  if (m_calculationSelected == isSelected && *calculation == m_calculation) {
+void HistoryViewCell::setCalculation(Calculation * calculation, bool expanded) {
+  if (m_calculationExpanded == expanded && *calculation == m_calculation) {
     return;
   }
   // Memoization
   m_calculation = *calculation;
-  m_calculationSelected = isSelected;
+  m_calculationExpanded = expanded;
   App * calculationApp = (App *)app();
   Calculation::DisplayOutput display = calculation->displayOutput(calculationApp->localContext());
   m_inputView.setLayout(calculation->createInputLayout());
@@ -147,7 +147,7 @@ void HistoryViewCell::setCalculation(Calculation * calculation, bool isSelected)
     rightOutputLayout = calculation->createExactOutputLayout();
   } else {
     rightOutputLayout = calculation->createApproximateOutputLayout(calculationApp->localContext());
-    if (display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && isSelected)) {
+    if (display == Calculation::DisplayOutput::ExactAndApproximate || (display == Calculation::DisplayOutput::ExactAndApproximateToggle && expanded)) {
       leftOutputLayout = calculation->createExactOutputLayout();
     }
   }
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index 818a0225e..dcb4b1289 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -40,7 +40,7 @@ public:
   Poincare::Layout layout() const override;
   KDColor backgroundColor() const override;
   Calculation * calculation() { return &m_calculation; }
-  void setCalculation(Calculation * calculation, bool isSelected = false);
+  void setCalculation(Calculation * calculation, bool expanded = false);
   int numberOfSubviews() const override;
   View * subviewAtIndex(int index) override;
   void layoutSubviews() override;
@@ -51,7 +51,7 @@ private:
   constexpr static KDCoordinate k_resultWidth = 80;
   void reloadScroll();
   Calculation m_calculation;
-  bool m_calculationSelected;
+  bool m_calculationExpanded;
   ScrollableExpressionView m_inputView;
   Shared::ScrollableExactApproximateExpressionsView m_scrollableOutputView;
   HistoryViewCellDataSource * m_dataSource;

From 1e72a1c9c2d368d379c421047f722198a671f6d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 10:14:11 +0200
Subject: [PATCH 227/295] [calculation] HistoryViewCell: clean

---
 apps/calculation/history_view_cell.cpp | 23 ++++++++++++++---------
 apps/calculation/history_view_cell.h   |  1 +
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 073af802b..204d3f6ec 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -74,18 +74,23 @@ void HistoryViewCell::reloadScroll() {
   m_scrollableOutputView.reloadScroll();
 }
 
-void HistoryViewCell::cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type) {
+void HistoryViewCell::reloadOutputSelection() {
   App * calculationApp = (App *)app();
   Calculation::DisplayOutput display = m_calculation.displayOutput(calculationApp->localContext());
+  /* Select the right output according to the calculation display output. This
+   * will reload the scroll to display the selected output. */
+  if (display == Calculation::DisplayOutput::ExactAndApproximate) {
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
+  } else {
+    assert(display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle) || display == Calculation::DisplayOutput::ExactOnly);
+    m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
+  }
+}
+
+void HistoryViewCell::cellDidSelectSubview(HistoryViewCellDataSource::SubviewType type) {
+  // Init output selection
   if (type == HistoryViewCellDataSource::SubviewType::Output) {
-    /* Select the right output according to the calculation display output. This
-     * will reload the scroll to display the selected output. */
-    if (display == Calculation::DisplayOutput::ExactAndApproximate) {
-      m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Left);
-    } else {
-      assert(display == Calculation::DisplayOutput::ApproximateOnly || (display == Calculation::DisplayOutput::ExactAndApproximateToggle) || display == Calculation::DisplayOutput::ExactOnly);
-      m_scrollableOutputView.setSelectedSubviewPosition(Shared::ScrollableExactApproximateExpressionsView::SubviewPosition::Right);
-    }
+    reloadOutputSelection();
   }
   /* The selected subview has changed. The displayed outputs might have changed.
    * For example, for the calculation 1.2+2 --> 3.2, selecting the output would
diff --git a/apps/calculation/history_view_cell.h b/apps/calculation/history_view_cell.h
index dcb4b1289..5a2d00d88 100644
--- a/apps/calculation/history_view_cell.h
+++ b/apps/calculation/history_view_cell.h
@@ -50,6 +50,7 @@ public:
 private:
   constexpr static KDCoordinate k_resultWidth = 80;
   void reloadScroll();
+  void reloadOutputSelection();
   Calculation m_calculation;
   bool m_calculationExpanded;
   ScrollableExpressionView m_inputView;

From 08e4b0d6a33d05f936adacb9e0654c48c5889c49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 10:41:36 +0200
Subject: [PATCH 228/295] [shared] Clean reloading (highlight, even) of
 ScrollableExactApproximateExpressionsCell and
 ScrollableExactApproximateExpressionsView

---
 ...scrollable_exact_approximate_expressions_cell.cpp |  4 ----
 .../scrollable_exact_approximate_expressions_cell.h  |  1 -
 ...scrollable_exact_approximate_expressions_view.cpp | 12 +++++++++---
 .../scrollable_exact_approximate_expressions_view.h  |  3 ++-
 apps/solver/solutions_controller.cpp                 |  1 -
 5 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/apps/shared/scrollable_exact_approximate_expressions_cell.cpp b/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
index 3894849dd..cfb76a462 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_cell.cpp
@@ -21,10 +21,6 @@ void ScrollableExactApproximateExpressionsCell::setEven(bool even) {
   m_view.evenOddCell()->setEven(even);
 }
 
-void ScrollableExactApproximateExpressionsCell::reloadCell() {
-  m_view.evenOddCell()->reloadCell();
-}
-
 void ScrollableExactApproximateExpressionsCell::reloadScroll() {
   m_view.reloadScroll();
 }
diff --git a/apps/shared/scrollable_exact_approximate_expressions_cell.h b/apps/shared/scrollable_exact_approximate_expressions_cell.h
index 3d8a8209f..fd3da4ace 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_cell.h
+++ b/apps/shared/scrollable_exact_approximate_expressions_cell.h
@@ -17,7 +17,6 @@ public:
   }
   void setHighlighted(bool highlight) override;
   void setEven(bool even) override;
-  void reloadCell() override;
   void reloadScroll();
   Responder * responder() override {
     return this;
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.cpp b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
index ebbf41791..d878def8b 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.cpp
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.cpp
@@ -25,6 +25,7 @@ void ScrollableExactApproximateExpressionsView::ContentCell::setHighlighted(bool
   m_highlighted = highlight;
   m_leftExpressionView.setBackgroundColor(backgroundColor());
   m_rightExpressionView.setBackgroundColor(backgroundColor());
+  m_approximateSign.setBackgroundColor(backgroundColor());
   if (highlight) {
     if (m_selectedSubviewPosition == SubviewPosition::Left) {
       m_leftExpressionView.setBackgroundColor(Palette::Select);
@@ -34,15 +35,19 @@ void ScrollableExactApproximateExpressionsView::ContentCell::setHighlighted(bool
   }
 }
 
-void ScrollableExactApproximateExpressionsView::ContentCell::reloadCell() {
-  setHighlighted(isHighlighted());
+void ScrollableExactApproximateExpressionsView::ContentCell::setEven(bool even) {
+  EvenOddCell::setEven(even);
+  m_leftExpressionView.setBackgroundColor(backgroundColor());
+  m_rightExpressionView.setBackgroundColor(backgroundColor());
   m_approximateSign.setBackgroundColor(backgroundColor());
+}
+
+void ScrollableExactApproximateExpressionsView::ContentCell::reloadTextColor() {
   if (numberOfSubviews() == 1) {
     m_rightExpressionView.setTextColor(KDColorBlack);
   } else {
     m_rightExpressionView.setTextColor(Palette::GreyVeryDark);
   }
-  layoutSubviews();
 }
 
 KDSize ScrollableExactApproximateExpressionsView::ContentCell::minimalSizeForOptimalDisplay() const {
@@ -117,6 +122,7 @@ void ScrollableExactApproximateExpressionsView::setLayouts(Poincare::Layout righ
   bool updateRightLayout = m_contentCell.rightExpressionView()->setLayout(rightLayout);
   bool updateLeftLayout = m_contentCell.leftExpressionView()->setLayout(leftLayout);
   if (updateRightLayout || updateLeftLayout) {
+    m_contentCell.reloadTextColor();
     m_contentCell.layoutSubviews();
   }
 }
diff --git a/apps/shared/scrollable_exact_approximate_expressions_view.h b/apps/shared/scrollable_exact_approximate_expressions_view.h
index 40ec3c59a..31d2afd87 100644
--- a/apps/shared/scrollable_exact_approximate_expressions_view.h
+++ b/apps/shared/scrollable_exact_approximate_expressions_view.h
@@ -35,7 +35,8 @@ private:
     ContentCell();
     KDColor backgroundColor() const override;
     void setHighlighted(bool highlight) override;
-    void reloadCell() override;
+    void setEven(bool even) override;
+    void reloadTextColor();
     KDSize minimalSizeForOptimalDisplay() const override;
     ExpressionView * rightExpressionView() {
       return &m_rightExpressionView;
diff --git a/apps/solver/solutions_controller.cpp b/apps/solver/solutions_controller.cpp
index 346e053e6..77e2138e4 100644
--- a/apps/solver/solutions_controller.cpp
+++ b/apps/solver/solutions_controller.cpp
@@ -203,7 +203,6 @@ void SolutionsController::willDisplayCellAtLocation(HighlightCell * cell, int i,
   }
   EvenOddCell * evenOddCell = static_cast<EvenOddCell *>(cell);
   evenOddCell->setEven(j%2 == 0);
-  evenOddCell->reloadCell();
 }
 
 KDCoordinate SolutionsController::columnWidth(int i) {

From 138587ee8e221dde1ddec519ce5b046e9bd14aed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 10:46:46 +0200
Subject: [PATCH 229/295] [calculation] Calculation: memoized display output

---
 apps/calculation/calculation.cpp | 22 ++++++++++++++--------
 apps/calculation/calculation.h   |  2 ++
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 5049b817f..34044090b 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -18,6 +18,7 @@ Calculation::Calculation() :
   m_inputText(),
   m_exactOutputText(),
   m_approximateOutputText(),
+  m_displayOutput(DisplayOutput::Unknown),
   m_height(-1),
   m_expandedHeight(-1),
   m_equalSign(EqualSign::Unknown)
@@ -127,6 +128,7 @@ bool Calculation::isEmpty() {
 
 void Calculation::tidy() {
   /* Uninitialized all Expression stored to free the Pool */
+  m_displayOutput = DisplayOutput::Unknown;
   m_height = -1;
   m_expandedHeight = -1;
   m_equalSign = EqualSign::Unknown;
@@ -165,29 +167,33 @@ Layout Calculation::createApproximateOutputLayout(Context * context) {
 }
 
 Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
-  if (shouldOnlyDisplayExactOutput()) {
-    return DisplayOutput::ExactOnly;
+  if (m_displayOutput != DisplayOutput::Unknown) {
+    return m_displayOutput;
   }
-  if (exactOutput().recursivelyMatches([](const Expression e, Context & c, bool replaceSymbols) {
+  if (shouldOnlyDisplayExactOutput()) {
+    m_displayOutput = DisplayOutput::ExactOnly;
+  } else if (exactOutput().recursivelyMatches([](const Expression e, Context & c, bool replaceSymbols) {
         /* If the exact result contains one of the following types, do not
          * display it. */
         ExpressionNode::Type t = e.type();
         return (t == ExpressionNode::Type::Random) || (t == ExpressionNode::Type::Round);},
         *context, true))
   {
-    return DisplayOutput::ApproximateOnly;
+    m_displayOutput = DisplayOutput::ApproximateOnly;
   } else if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal
      * because of the number of significant digits, we display both. */
-    return exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal ? DisplayOutput::ApproximateOnly : DisplayOutput::ExactAndApproximate;
+    m_displayOutput = exactAndApproximateDisplayedOutputsAreEqual(context) == Calculation::EqualSign::Equal ? DisplayOutput::ApproximateOnly : DisplayOutput::ExactAndApproximate;
   } else if (strcmp(m_exactOutputText, Undefined::Name()) == 0 || strcmp(m_approximateOutputText, Unreal::Name()) == 0) {
     // If the approximate result is 'unreal' or the exact result is 'undef'
-    return DisplayOutput::ApproximateOnly;
+    m_displayOutput = DisplayOutput::ApproximateOnly;
   } else if (input().isApproximate(*context) || exactOutput().isApproximate(*context)) {
-    return DisplayOutput::ExactAndApproximateToggle;
+    m_displayOutput = DisplayOutput::ExactAndApproximateToggle;
+  } else {
+    m_displayOutput = DisplayOutput::ExactAndApproximate;
   }
-  return DisplayOutput::ExactAndApproximate;
+  return m_displayOutput;
 }
 
 bool Calculation::shouldOnlyDisplayExactOutput() {
diff --git a/apps/calculation/calculation.h b/apps/calculation/calculation.h
index edc60d05d..ff00be74c 100644
--- a/apps/calculation/calculation.h
+++ b/apps/calculation/calculation.h
@@ -19,6 +19,7 @@ public:
   };
 
   enum class DisplayOutput : uint8_t {
+    Unknown,
     ExactOnly,
     ApproximateOnly,
     ExactAndApproximate,
@@ -53,6 +54,7 @@ private:
   char m_inputText[Constant::MaxSerializedExpressionSize];
   char m_exactOutputText[Constant::MaxSerializedExpressionSize];
   char m_approximateOutputText[Constant::MaxSerializedExpressionSize];
+  DisplayOutput m_displayOutput;
   KDCoordinate m_height;
   KDCoordinate m_expandedHeight;
   EqualSign m_equalSign;

From 2217eebaec97aa48c37c83feb8d7f97e7f58625a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 26 Apr 2019 14:48:31 +0200
Subject: [PATCH 230/295] [escher] SelectableTableView: when reloading data, we
 temporary deselect the table. We warn the SelectableTableViewDelegate that
 the selection change is 'within a temporary selection change' when notifying
 it of the change.

---
 apps/calculation/history_controller.cpp          |  4 ++--
 apps/calculation/history_controller.h            |  2 +-
 apps/code/console_controller.cpp                 |  5 ++++-
 apps/code/console_controller.h                   |  2 +-
 apps/code/menu_controller.cpp                    |  4 ++--
 apps/code/menu_controller.h                      |  2 +-
 apps/home/controller.cpp                         |  5 ++++-
 apps/home/controller.h                           |  2 +-
 apps/regression/calculation_controller.cpp       |  5 ++++-
 apps/regression/calculation_controller.h         |  2 +-
 apps/sequence/list/list_parameter_controller.cpp |  4 ++--
 apps/sequence/list/list_parameter_controller.h   |  2 +-
 apps/shared/expression_model_list_controller.cpp |  4 ++--
 apps/shared/expression_model_list_controller.h   |  2 +-
 apps/shared/function_list_controller.cpp         |  6 +++---
 apps/shared/function_list_controller.h           |  2 +-
 escher/include/escher/selectable_table_view.h    |  4 ++--
 .../escher/selectable_table_view_delegate.h      |  7 ++++++-
 escher/src/selectable_table_view.cpp             | 16 ++++++++--------
 escher/src/selectable_table_view_delegate.cpp    |  2 +-
 20 files changed, 48 insertions(+), 34 deletions(-)

diff --git a/apps/calculation/history_controller.cpp b/apps/calculation/history_controller.cpp
index 786345dfc..9678c533c 100644
--- a/apps/calculation/history_controller.cpp
+++ b/apps/calculation/history_controller.cpp
@@ -105,8 +105,8 @@ bool HistoryController::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
-void HistoryController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
-  if (previousSelectedCellY == selectedRow()) {
+void HistoryController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (withinTemporarySelection || previousSelectedCellY == selectedRow()) {
     return;
   }
   HistoryViewCell * cell = static_cast<HistoryViewCell *>(t->selectedCell());
diff --git a/apps/calculation/history_controller.h b/apps/calculation/history_controller.h
index 9486748e5..67caf5ec9 100644
--- a/apps/calculation/history_controller.h
+++ b/apps/calculation/history_controller.h
@@ -24,7 +24,7 @@ public:
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
   KDCoordinate rowHeight(int j) override;
   int typeAtLocation(int i, int j) override;
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection = false) override;
   void scrollToCell(int i, int j);
 private:
   CalculationSelectableTableView * selectableTableView();
diff --git a/apps/code/console_controller.cpp b/apps/code/console_controller.cpp
index d5da9c826..429a0f170 100644
--- a/apps/code/console_controller.cpp
+++ b/apps/code/console_controller.cpp
@@ -245,7 +245,10 @@ void ConsoleController::willDisplayCellAtLocation(HighlightCell * cell, int i, i
   }
 }
 
-void ConsoleController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void ConsoleController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (withinTemporarySelection) {
+    return;
+  }
   if (t->selectedRow() == m_consoleStore.numberOfLines()) {
     m_editCell.setEditing(true);
     return;
diff --git a/apps/code/console_controller.h b/apps/code/console_controller.h
index d39f6edfe..43779f340 100644
--- a/apps/code/console_controller.h
+++ b/apps/code/console_controller.h
@@ -52,7 +52,7 @@ public:
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
 
   // SelectableTableViewDelegate
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
 
   // TextFieldDelegate
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index 60dda9eec..78adafc2f 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -272,8 +272,8 @@ void MenuController::willDisplayScriptTitleCellForIndex(HighlightCell * cell, in
   (static_cast<ScriptNameCell *>(cell))->textField()->setText(m_scriptStore->scriptAtIndex(index).fullName());
 }
 
-void MenuController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
-  if (selectedRow() == numberOfRows() - 1 && selectedColumn() == 1 && m_shouldDisplayAddScriptRow) {
+void MenuController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (!withinTemporarySelection && selectedRow() == numberOfRows() - 1 && selectedColumn() == 1 && m_shouldDisplayAddScriptRow) {
     t->selectCellAtLocation(0, numberOfRows()-1);
   }
 }
diff --git a/apps/code/menu_controller.h b/apps/code/menu_controller.h
index 7b94014f4..5848a302a 100644
--- a/apps/code/menu_controller.h
+++ b/apps/code/menu_controller.h
@@ -46,7 +46,7 @@ public:
   void willDisplayScriptTitleCellForIndex(HighlightCell * cell, int index);
 
   /* SelectableTableViewDelegate */
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
 
   /* TextFieldDelegate */
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
diff --git a/apps/home/controller.cpp b/apps/home/controller.cpp
index 10f0075a5..f177204ec 100644
--- a/apps/home/controller.cpp
+++ b/apps/home/controller.cpp
@@ -134,7 +134,10 @@ int Controller::numberOfIcons() {
   return m_container->numberOfApps() - 1;
 }
 
-void Controller::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void Controller::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (withinTemporarySelection) {
+    return;
+  }
   /* If the number of apps (including home) is != 3*n+1, when we display the
    * lowest icons, the other(s) are empty. As no icon is thus redrawn on the
    * previous ones, the cell is not cleaned. We need to redraw a white rect on
diff --git a/apps/home/controller.h b/apps/home/controller.h
index ae3be69e5..116b6291a 100644
--- a/apps/home/controller.h
+++ b/apps/home/controller.h
@@ -25,7 +25,7 @@ public:
   virtual HighlightCell * reusableCell(int index) override;
   virtual int reusableCellCount() override;
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
 private:
   int numberOfIcons();
   class ContentView : public View {
diff --git a/apps/regression/calculation_controller.cpp b/apps/regression/calculation_controller.cpp
index 0a0ddb1db..145950d19 100644
--- a/apps/regression/calculation_controller.cpp
+++ b/apps/regression/calculation_controller.cpp
@@ -65,7 +65,10 @@ void CalculationController::didBecomeFirstResponder() {
   TabTableController::didBecomeFirstResponder();
 }
 
-void CalculationController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void CalculationController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (withinTemporarySelection) {
+    return;
+  }
   /* To prevent selecting cell with no content (top left corner of the table),
    * as soon as the selected cell is the top left corner, we either reselect
    * the previous cell or select the tab controller depending on from which cell
diff --git a/apps/regression/calculation_controller.h b/apps/regression/calculation_controller.h
index e59265a62..00237fa73 100644
--- a/apps/regression/calculation_controller.h
+++ b/apps/regression/calculation_controller.h
@@ -29,7 +29,7 @@ public:
   void didBecomeFirstResponder() override;
 
   // SelectableTableViewDelegate
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
 
   // AlternateEmptyViewDefaultDelegate
   bool isEmpty() const override;
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index cc0f25fcf..ac36094be 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -92,8 +92,8 @@ bool ListParameterController::textFieldDidFinishEditing(TextField * textField, c
   return true;
 }
 
-void ListParameterController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
-  if (previousSelectedCellX == t->selectedColumn() && previousSelectedCellY == t->selectedRow()) {
+void ListParameterController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
+  if (withinTemporarySelection || (previousSelectedCellX == t->selectedColumn() && previousSelectedCellY == t->selectedRow())) {
     return;
   }
   if (!hasInitialRankRow()) {
diff --git a/apps/sequence/list/list_parameter_controller.h b/apps/sequence/list/list_parameter_controller.h
index 09ff8c4cd..e43ee5d43 100644
--- a/apps/sequence/list/list_parameter_controller.h
+++ b/apps/sequence/list/list_parameter_controller.h
@@ -19,7 +19,7 @@ public:
 
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
   bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
   Shared::TextFieldDelegateApp * textFieldDelegateApp() override;
 
   // ListViewDataSource
diff --git a/apps/shared/expression_model_list_controller.cpp b/apps/shared/expression_model_list_controller.cpp
index fe4a33aa4..1bca31721 100644
--- a/apps/shared/expression_model_list_controller.cpp
+++ b/apps/shared/expression_model_list_controller.cpp
@@ -16,11 +16,11 @@ ExpressionModelListController::ExpressionModelListController(Responder * parentR
   m_addNewModel.setMessage(text);
 }
 
-void ExpressionModelListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void ExpressionModelListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
   int currentSelectedRow = selectedRow();
 
   // Update m_cumulatedHeightForSelectedIndex if we scrolled one cell up/down
-  if (previousSelectedCellY >= 0 && previousSelectedCellY == previousSelectedCellY + 1) {
+  if (currentSelectedRow >= 0 && currentSelectedRow == previousSelectedCellY + 1) {
     /* We selected the cell under the previous cell. Shift the memoized cell
      * heights. */
     shiftMemoization(true);
diff --git a/apps/shared/expression_model_list_controller.h b/apps/shared/expression_model_list_controller.h
index 9fc00367f..82ae4db1a 100644
--- a/apps/shared/expression_model_list_controller.h
+++ b/apps/shared/expression_model_list_controller.h
@@ -13,7 +13,7 @@ public:
 protected:
   static constexpr KDCoordinate k_expressionMargin = 5;
   // SelectableTableViewDelegate
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
   // TableViewDataSource
   virtual int numberOfExpressionRows();
   KDCoordinate memoizedRowHeight(int j);
diff --git a/apps/shared/function_list_controller.cpp b/apps/shared/function_list_controller.cpp
index cc65e5211..9dfa8dce2 100644
--- a/apps/shared/function_list_controller.cpp
+++ b/apps/shared/function_list_controller.cpp
@@ -214,11 +214,11 @@ void FunctionListController::willExitResponderChain(Responder * nextFirstRespond
 
 /* SelectableTableViewDelegate */
 
-void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
   // Update memoization of cell heights
-  ExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY);
+  ExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY, withinTemporarySelection);
   // Do not select the cell left of the "addEmptyFunction" cell
-  if (isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
+  if (!withinTemporarySelection && isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
     t->selectCellAtLocation(1, numberOfRows()-1);
   }
 }
diff --git a/apps/shared/function_list_controller.h b/apps/shared/function_list_controller.h
index 273edd401..8bc0dd055 100644
--- a/apps/shared/function_list_controller.h
+++ b/apps/shared/function_list_controller.h
@@ -45,7 +45,7 @@ public:
   View * view() override { return &m_selectableTableView; }
 
   /* SelectableTableViewDelegate*/
-  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) override;
+  void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) override;
 
   /* ExpressionModelListController */
   SelectableTableView * selectableTableView() override { return &m_selectableTableView; }
diff --git a/escher/include/escher/selectable_table_view.h b/escher/include/escher/selectable_table_view.h
index 6e1e7c000..cecd44a74 100644
--- a/escher/include/escher/selectable_table_view.h
+++ b/escher/include/escher/selectable_table_view.h
@@ -29,8 +29,8 @@ public:
   virtual bool handleEvent(Ion::Events::Event event) override;
   virtual void didEnterResponderChain(Responder * previousFirstResponder) override;
   virtual void willExitResponderChain(Responder * nextFirstResponder) override;
-  void deselectTable(bool notifySelectableDelegate = true);
-  bool selectCellAtLocation(int i, int j, bool setFirstResponder = true, bool notifySelectableDelegate = true);
+  void deselectTable(bool withinTemporarySelection = false);
+  bool selectCellAtLocation(int i, int j, bool setFirstResponder = true, bool withinTemporarySelection = false);
   HighlightCell * selectedCell();
 protected:
   SelectableTableViewDataSource * m_selectionDataSource;
diff --git a/escher/include/escher/selectable_table_view_delegate.h b/escher/include/escher/selectable_table_view_delegate.h
index 33249f3f9..e8f11864a 100644
--- a/escher/include/escher/selectable_table_view_delegate.h
+++ b/escher/include/escher/selectable_table_view_delegate.h
@@ -5,7 +5,12 @@ class SelectableTableView;
 
 class SelectableTableViewDelegate {
 public:
-  virtual void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY);
+  /* withinTemporarySelection flag indicates when the selection change happens
+   * in a temporary deselection: indeed, when reloading the data of the table,
+   * we deselect the table before re-layouting the entire table and re-select
+   * the previous selected cell. We might implement different course of action
+   * when the selection change is 'real' or within temporary selection. */
+  virtual void tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection = false);
 };
 
 #endif
diff --git a/escher/src/selectable_table_view.cpp b/escher/src/selectable_table_view.cpp
index 995e7c3e7..226701a6d 100644
--- a/escher/src/selectable_table_view.cpp
+++ b/escher/src/selectable_table_view.cpp
@@ -37,7 +37,7 @@ void SelectableTableView::selectColumn(int i) {
 void SelectableTableView::reloadData(bool setFirstResponder) {
   int col = selectedColumn();
   int row = selectedRow();
-  deselectTable(false);
+  deselectTable(true);
   /* FIXME: The problem with calling deselectTable is that at this point in time
    * the datasource's model is very likely to have changed. Therefore it's
    * rather complicated to get a pointer to the currently selected cell (in
@@ -45,7 +45,7 @@ void SelectableTableView::reloadData(bool setFirstResponder) {
   /* As a workaround, datasources can reset the highlighted state in their
    * willDisplayCell callback. */
   TableView::layoutSubviews();
-  selectCellAtLocation(col, row, setFirstResponder, false);
+  selectCellAtLocation(col, row, setFirstResponder, true);
 }
 
 void SelectableTableView::didEnterResponderChain(Responder * previousFirstResponder) {
@@ -60,18 +60,18 @@ void SelectableTableView::willExitResponderChain(Responder * nextFirstResponder)
   unhighlightSelectedCell();
 }
 
-void SelectableTableView::deselectTable(bool notifySelectableDelegate) {
+void SelectableTableView::deselectTable(bool withinTemporarySelection) {
   unhighlightSelectedCell();
   int previousSelectedCellX = selectedColumn();
   int previousSelectedCellY = selectedRow();
   selectColumn(0);
   selectRow(-1);
-  if (m_delegate && notifySelectableDelegate) {
-    m_delegate->tableViewDidChangeSelection(this, previousSelectedCellX, previousSelectedCellY);
+  if (m_delegate) {
+    m_delegate->tableViewDidChangeSelection(this, previousSelectedCellX, previousSelectedCellY, withinTemporarySelection);
   }
 }
 
-bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstResponder, bool notifySelectableDelegate) {
+bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstResponder, bool withinTemporarySelection) {
   if (i < 0 || i >= dataSource()->numberOfColumns()) {
     return false;
   }
@@ -84,8 +84,8 @@ bool SelectableTableView::selectCellAtLocation(int i, int j, bool setFirstRespon
   selectColumn(i);
   selectRow(j);
 
-  if (m_delegate && notifySelectableDelegate) {
-    m_delegate->tableViewDidChangeSelection(this, previousX, previousY);
+  if (m_delegate) {
+    m_delegate->tableViewDidChangeSelection(this, previousX, previousY, withinTemporarySelection);
   }
 
   /* We need to scroll:
diff --git a/escher/src/selectable_table_view_delegate.cpp b/escher/src/selectable_table_view_delegate.cpp
index 3a8de3636..25da1557a 100644
--- a/escher/src/selectable_table_view_delegate.cpp
+++ b/escher/src/selectable_table_view_delegate.cpp
@@ -1,4 +1,4 @@
 #include <escher/selectable_table_view_delegate.h>
 
-void SelectableTableViewDelegate::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
+void SelectableTableViewDelegate::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
 }

From 54ff7a3b848b7b28cb32d9730b7fe6eab743735f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Mon, 29 Apr 2019 17:55:28 +0200
Subject: [PATCH 231/295] [calculation] HistoryController: Avoid useless cell
 reloading (avoid blinking)

---
 apps/calculation/history_controller.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/apps/calculation/history_controller.cpp b/apps/calculation/history_controller.cpp
index 9678c533c..3b75f6ee6 100644
--- a/apps/calculation/history_controller.cpp
+++ b/apps/calculation/history_controller.cpp
@@ -122,7 +122,6 @@ void HistoryController::tableViewDidChangeSelection(SelectableTableView * t, int
     return;
   }
   app()->setFirstResponder(selectedCell);
-  selectedCell->reloadCell();
 }
 
 int HistoryController::numberOfRows() {

From 513a4cf8520640dca8da01eaf340c6dd816d07f8 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 20 Feb 2019 18:12:33 +0100
Subject: [PATCH 232/295] [apps] BannerView::numberOfSubviews

Shared::BannerView::numberOfSubviews made pure virtual.
Define constexpr attributes instead of magic numbers.
Move numberOfSubviews to header file.
---
 apps/graph/graph/banner_view.cpp    | 8 --------
 apps/graph/graph/banner_view.h      | 4 ++--
 apps/regression/banner_view.cpp     | 6 +-----
 apps/regression/banner_view.h       | 6 +++---
 apps/sequence/graph/banner_view.cpp | 4 ----
 apps/sequence/graph/banner_view.h   | 3 ++-
 apps/shared/banner_view.cpp         | 4 ----
 apps/shared/banner_view.h           | 2 +-
 apps/statistics/box_banner_view.h   | 3 ++-
 9 files changed, 11 insertions(+), 29 deletions(-)

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index 0ce02d0b2..0a0f9b454 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -14,14 +14,6 @@ BannerView::BannerView() :
 {
 }
 
-void BannerView::setNumberOfSubviews(int numberOfSubviews) {
-  m_numberOfSubviews = numberOfSubviews;
-}
-
-int BannerView::numberOfSubviews() const {
-  return m_numberOfSubviews;
-}
-
 TextView * BannerView::textViewAtIndex(int i) const {
   const TextView * textViews[6] = {&m_abscissaView, &m_functionView, &m_derivativeView, &m_tangentEquationView, &m_aView, &m_bView};
   return (TextView *)textViews[i];
diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 165be7531..553f7416d 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -8,9 +8,9 @@ namespace Graph {
 class BannerView : public Shared::BannerView {
 public:
   BannerView();
-  void setNumberOfSubviews(int numberOfSubviews);
+  void setNumberOfSubviews(int numberOfSubviews) { m_numberOfSubviews = numberOfSubviews; }
 private:
-  int numberOfSubviews() const override;
+  int numberOfSubviews() const override { return m_numberOfSubviews; }
   TextView * textViewAtIndex(int i) const override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_abscissaView;
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index 8861ff019..680b8bcd2 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -18,12 +18,8 @@ BannerView::BannerView() :
 {
 }
 
-int BannerView::numberOfSubviews() const {
-  return k_numberOfTextViews;
-}
-
 TextView * BannerView::textViewAtIndex(int i) const {
-  const TextView * textViews[k_numberOfTextViews] = {&m_dotNameView, &m_xView, &m_yView, &m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
+  const TextView * textViews[k_numberOfSubviews] = {&m_dotNameView, &m_xView, &m_yView, &m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
   return (TextView *)textViews[i];
 }
 
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index c0345e80f..7819138a4 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -9,14 +9,14 @@ namespace Regression {
 class BannerView : public Shared::BannerView {
 public:
   BannerView();
-  int numberOfTextviews() const { return k_numberOfTextViews; }
+  int numberOfTextviews() const { return k_numberOfSubviews; }
   const KDFont * font() const { return k_font; }
 private:
   static constexpr const KDFont * k_font = KDFont::SmallFont;
   static constexpr KDColor k_textColor = KDColorBlack;
   static constexpr KDColor k_backgroundColor = Palette::GreyMiddle;
-  static constexpr int k_numberOfTextViews = 9;
-  int numberOfSubviews() const override;
+  static constexpr int k_numberOfSubviews = 9;
+  int numberOfSubviews() const override { return k_numberOfSubviews; }
   TextView * textViewAtIndex(int i) const override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_dotNameView;
diff --git a/apps/sequence/graph/banner_view.cpp b/apps/sequence/graph/banner_view.cpp
index 50e0f7f2f..cb5cedfb5 100644
--- a/apps/sequence/graph/banner_view.cpp
+++ b/apps/sequence/graph/banner_view.cpp
@@ -8,10 +8,6 @@ BannerView::BannerView() :
 {
 }
 
-int BannerView::numberOfSubviews() const {
-  return 2;
-}
-
 TextView * BannerView::textViewAtIndex(int i) const {
   const TextView * views[2] = {&m_abscissaView, &m_sequenceView};
   return (TextView *)views[i];
diff --git a/apps/sequence/graph/banner_view.h b/apps/sequence/graph/banner_view.h
index 4d2727e7f..9e708c244 100644
--- a/apps/sequence/graph/banner_view.h
+++ b/apps/sequence/graph/banner_view.h
@@ -10,7 +10,8 @@ class BannerView : public Shared::BannerView {
 public:
   BannerView();
 private:
-  int numberOfSubviews() const override;
+  static constexpr int k_numberOfSubviews = 2;
+  int numberOfSubviews() const override { return k_numberOfSubviews; }
   TextView * textViewAtIndex(int i) const override;
   BufferTextView m_abscissaView;
   BufferTextView m_sequenceView;
diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 22dad70fa..ac4fd9e9b 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -29,10 +29,6 @@ KDSize BannerView::minimalSizeForOptimalDisplay() const {
   return KDSize(0, HeightGivenNumberOfLines(numberOfLines()));
 }
 
-int BannerView::numberOfSubviews() const {
-  return 0;
-}
-
 void BannerView::layoutSubviews() {
   /* We iterate on subviews, adding their width until we exceed the view bound.
   * The last subview that exceeds the bound is recorded as the first subview of
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index baa87725e..f1fd16d1d 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -12,7 +12,7 @@ public:
   void setMessageAtIndex(I18n::Message text, int index);
   KDSize minimalSizeForOptimalDisplay() const override;
 private:
-  int numberOfSubviews() const override;
+  int numberOfSubviews() const override = 0;
   View * subviewAtIndex(int index) override;
   void layoutSubviews() override;
   int numberOfLines() const;
diff --git a/apps/statistics/box_banner_view.h b/apps/statistics/box_banner_view.h
index a53060061..d2821c243 100644
--- a/apps/statistics/box_banner_view.h
+++ b/apps/statistics/box_banner_view.h
@@ -11,7 +11,8 @@ class BoxBannerView : public Shared::BannerView {
 public:
   BoxBannerView();
 private:
-  int numberOfSubviews() const override { return 3; }
+  static constexpr int k_numberOfSubviews = 3;
+  int numberOfSubviews() const override { return k_numberOfSubviews; }
   TextView * textViewAtIndex(int i) const override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_seriesName;

From 236b752f4fda5e983cf70c0752ea356d29576de6 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 21 Feb 2019 10:34:38 +0100
Subject: [PATCH 233/295] [apps] replace BannerView::textViewAtIndex by
 subviewAtIndex

---
 apps/graph/graph/banner_view.cpp          |  8 +++++---
 apps/graph/graph/banner_view.h            |  2 +-
 apps/regression/banner_view.cpp           |  8 +++++---
 apps/regression/banner_view.h             |  2 +-
 apps/sequence/graph/banner_view.cpp       |  8 +++++---
 apps/sequence/graph/banner_view.h         |  2 +-
 apps/shared/banner_view.cpp               | 18 ++++++------------
 apps/shared/banner_view.h                 |  3 +--
 apps/statistics/box_banner_view.cpp       |  8 +++++---
 apps/statistics/box_banner_view.h         |  2 +-
 apps/statistics/histogram_banner_view.cpp |  7 ++++---
 apps/statistics/histogram_banner_view.h   |  2 +-
 12 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index 0a0f9b454..5bc3b19bd 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -1,4 +1,5 @@
 #include "banner_view.h"
+#include <assert.h>
 #include <apps/i18n.h>
 
 namespace Graph {
@@ -14,9 +15,10 @@ BannerView::BannerView() :
 {
 }
 
-TextView * BannerView::textViewAtIndex(int i) const {
-  const TextView * textViews[6] = {&m_abscissaView, &m_functionView, &m_derivativeView, &m_tangentEquationView, &m_aView, &m_bView};
-  return (TextView *)textViews[i];
+View * BannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_abscissaView, &m_functionView, &m_derivativeView, &m_tangentEquationView, &m_aView, &m_bView};
+  return subviews[index];
 }
 
 MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 553f7416d..848e23a19 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -11,7 +11,7 @@ public:
   void setNumberOfSubviews(int numberOfSubviews) { m_numberOfSubviews = numberOfSubviews; }
 private:
   int numberOfSubviews() const override { return m_numberOfSubviews; }
-  TextView * textViewAtIndex(int i) const override;
+  View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_abscissaView;
   BufferTextView m_functionView;
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index 680b8bcd2..ba416ee06 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -1,4 +1,5 @@
 #include "banner_view.h"
+#include <assert.h>
 
 namespace Regression {
 
@@ -18,9 +19,10 @@ BannerView::BannerView() :
 {
 }
 
-TextView * BannerView::textViewAtIndex(int i) const {
-  const TextView * textViews[k_numberOfSubviews] = {&m_dotNameView, &m_xView, &m_yView, &m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
-  return (TextView *)textViews[i];
+View * BannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_dotNameView, &m_xView, &m_yView, &m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
+  return subviews[index];
 }
 
 MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index 7819138a4..0f107c4ab 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -17,7 +17,7 @@ private:
   static constexpr KDColor k_backgroundColor = Palette::GreyMiddle;
   static constexpr int k_numberOfSubviews = 9;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
-  TextView * textViewAtIndex(int i) const override;
+  View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_dotNameView;
   BufferTextView m_xView;
diff --git a/apps/sequence/graph/banner_view.cpp b/apps/sequence/graph/banner_view.cpp
index cb5cedfb5..2b48008d8 100644
--- a/apps/sequence/graph/banner_view.cpp
+++ b/apps/sequence/graph/banner_view.cpp
@@ -1,4 +1,5 @@
 #include "banner_view.h"
+#include <assert.h>
 
 namespace Sequence {
 
@@ -8,9 +9,10 @@ BannerView::BannerView() :
 {
 }
 
-TextView * BannerView::textViewAtIndex(int i) const {
-  const TextView * views[2] = {&m_abscissaView, &m_sequenceView};
-  return (TextView *)views[i];
+View * BannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_abscissaView, &m_sequenceView};
+  return subviews[index];
 }
 
 }
diff --git a/apps/sequence/graph/banner_view.h b/apps/sequence/graph/banner_view.h
index 9e708c244..6da45ddf4 100644
--- a/apps/sequence/graph/banner_view.h
+++ b/apps/sequence/graph/banner_view.h
@@ -12,7 +12,7 @@ public:
 private:
   static constexpr int k_numberOfSubviews = 2;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
-  TextView * textViewAtIndex(int i) const override;
+  View * subviewAtIndex(int index) override;
   BufferTextView m_abscissaView;
   BufferTextView m_sequenceView;
 };
diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index ac4fd9e9b..420768248 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -1,6 +1,5 @@
 #include "banner_view.h"
 #include <string.h>
-#include <assert.h>
 
 namespace Shared {
 
@@ -14,7 +13,7 @@ void BannerView::setLegendAtIndex(char * text, int index) {
    * So changing a legend implies two things
    *  - First, we need to update the textView to ensure it has the new content
    *  - Second, we need to relayout *all* of our subviews. */
-  TextView * textView = textViewAtIndex(index);
+  TextView * textView = static_cast<TextView *>(subviewAtIndex(index));
   textView->setText(text);
   layoutSubviews();
 }
@@ -37,15 +36,15 @@ void BannerView::layoutSubviews() {
   * line and iterate the process. */
   KDCoordinate totalWidth = bounds().width();
   KDCoordinate lineWidth = 0;
-  TextView * textViewPreviousLine = textViewAtIndex(0);
+  View * textViewPreviousLine = subviewAtIndex(0);
   int indexOfFirstViewOfCurrentLine = 0;
   KDCoordinate y = 0;
   /* We do a last iteration of the loop to layout the last line. */
   for (int i = 0; i <= numberOfSubviews(); i++) {
-    TextView * textView = nullptr;
+    View * textView = nullptr;
     KDCoordinate currentViewWidth = totalWidth;
     if (i < numberOfSubviews()) {
-      textView = textViewAtIndex(i);
+      textView = subviewAtIndex(i);
       currentViewWidth = textView->minimalSizeForOptimalDisplay().width();
     }
     // The subview exceed the total width
@@ -54,7 +53,7 @@ void BannerView::layoutSubviews() {
       int nbOfTextViewInLine = i > indexOfFirstViewOfCurrentLine ? i-indexOfFirstViewOfCurrentLine : 1;
       KDCoordinate roundingError = totalWidth-lineWidth-nbOfTextViewInLine*(int)((totalWidth-lineWidth)/nbOfTextViewInLine);
       for (int j = indexOfFirstViewOfCurrentLine; j < i; j++) {
-        textViewPreviousLine = textViewAtIndex(j);
+        textViewPreviousLine = subviewAtIndex(j);
         KDCoordinate textWidth = textViewPreviousLine->minimalSizeForOptimalDisplay().width() + (totalWidth - lineWidth)/nbOfTextViewInLine;
         // For the last text view, avoid letting a 1-pixel-wide empty vertical due to rounding error:
         textWidth = j == i-1 ? textWidth + roundingError : textWidth;
@@ -71,17 +70,12 @@ void BannerView::layoutSubviews() {
   }
 }
 
-View * BannerView::subviewAtIndex(int index) {
-  assert(index >= 0 && index < numberOfSubviews());
-  return textViewAtIndex(index);
-}
-
 int BannerView::numberOfLines() const {
   KDCoordinate width = bounds().width();
   KDCoordinate usedWidth = 0;
   KDCoordinate lineNumber = 0;
   for (int i = 0; i < numberOfSubviews(); i++) {
-    KDCoordinate textWidth = KDFont::SmallFont->stringSize(textViewAtIndex(i)->text()).width();
+    KDCoordinate textWidth = const_cast<Shared::BannerView *>(this)->subviewAtIndex(i)->minimalSizeForOptimalDisplay().width();
     if (usedWidth+textWidth > width) {
       usedWidth = textWidth;
       lineNumber++;
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index f1fd16d1d..ddad0f20a 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -13,10 +13,9 @@ public:
   KDSize minimalSizeForOptimalDisplay() const override;
 private:
   int numberOfSubviews() const override = 0;
-  View * subviewAtIndex(int index) override;
+  View * subviewAtIndex(int index) override = 0;
   void layoutSubviews() override;
   int numberOfLines() const;
-  virtual TextView * textViewAtIndex(int i) const = 0;
   virtual MessageTextView * messageTextViewAtIndex(int i) const;
 };
 
diff --git a/apps/statistics/box_banner_view.cpp b/apps/statistics/box_banner_view.cpp
index 4bd8a5238..68d93882d 100644
--- a/apps/statistics/box_banner_view.cpp
+++ b/apps/statistics/box_banner_view.cpp
@@ -1,4 +1,5 @@
 #include "box_banner_view.h"
+#include <assert.h>
 
 namespace Statistics {
 
@@ -9,9 +10,10 @@ BoxBannerView::BoxBannerView() :
 {
 }
 
-TextView * BoxBannerView::textViewAtIndex(int index) const {
-  const TextView * textViews[3] = {&m_seriesName, &m_calculationName, &m_calculationValue};
-  return (TextView *)textViews[index];
+View * BoxBannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_seriesName, &m_calculationName, &m_calculationValue};
+  return subviews[index];
 }
 
 MessageTextView * BoxBannerView::messageTextViewAtIndex(int index) const {
diff --git a/apps/statistics/box_banner_view.h b/apps/statistics/box_banner_view.h
index d2821c243..40beaa286 100644
--- a/apps/statistics/box_banner_view.h
+++ b/apps/statistics/box_banner_view.h
@@ -13,7 +13,7 @@ public:
 private:
   static constexpr int k_numberOfSubviews = 3;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
-  TextView * textViewAtIndex(int i) const override;
+  View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_seriesName;
   MessageTextView m_calculationName;
diff --git a/apps/statistics/histogram_banner_view.cpp b/apps/statistics/histogram_banner_view.cpp
index dd7e971d8..224fa210e 100644
--- a/apps/statistics/histogram_banner_view.cpp
+++ b/apps/statistics/histogram_banner_view.cpp
@@ -14,9 +14,10 @@ HistogramBannerView::HistogramBannerView() :
 {
 }
 
-TextView * HistogramBannerView::textViewAtIndex(int i) const {
-  const TextView * textViews[k_numberOfSubviews] = {&m_intervalLegendView, &m_intervalView, &m_sizeLegendView, &m_sizeView, &m_frequencyLegendView, &m_frequencyView};
-  return (TextView *)textViews[i];
+View * HistogramBannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_intervalLegendView, &m_intervalView, &m_sizeLegendView, &m_sizeView, &m_frequencyLegendView, &m_frequencyView};
+  return subviews[index];
 }
 
 MessageTextView * HistogramBannerView::messageTextViewAtIndex(int index) const {
diff --git a/apps/statistics/histogram_banner_view.h b/apps/statistics/histogram_banner_view.h
index 161c78a37..b02e11423 100644
--- a/apps/statistics/histogram_banner_view.h
+++ b/apps/statistics/histogram_banner_view.h
@@ -13,7 +13,7 @@ public:
 private:
   static constexpr int k_numberOfSubviews = 6;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
-  TextView * textViewAtIndex(int i) const override;
+  View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int index) const override;
   MessageTextView m_intervalLegendView;
   BufferTextView m_intervalView;

From 0d34923dd108ecd5c27d11258386ac8ad2ee4d65 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 5 Mar 2019 11:04:42 +0100
Subject: [PATCH 234/295] [apps] Graph/Regression/Sequence::BannerView inherit
 from new Shared::XYBannerView

---
 apps/graph/graph/banner_view.cpp       | 12 +++++++-----
 apps/graph/graph/banner_view.h         |  6 ++----
 apps/regression/banner_view.cpp        | 13 ++++++++++---
 apps/regression/banner_view.h          |  9 +++------
 apps/sequence/Makefile                 |  1 -
 apps/sequence/graph/banner_view.cpp    | 18 ------------------
 apps/sequence/graph/banner_view.h      | 22 ----------------------
 apps/sequence/graph/graph_controller.h |  6 +++---
 apps/shared/Makefile                   |  1 +
 apps/shared/xy_banner_view.cpp         | 18 ++++++++++++++++++
 apps/shared/xy_banner_view.h           | 22 ++++++++++++++++++++++
 11 files changed, 66 insertions(+), 62 deletions(-)
 delete mode 100644 apps/sequence/graph/banner_view.cpp
 delete mode 100644 apps/sequence/graph/banner_view.h
 create mode 100644 apps/shared/xy_banner_view.cpp
 create mode 100644 apps/shared/xy_banner_view.h

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index 5bc3b19bd..813d1d989 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -5,20 +5,22 @@
 namespace Graph {
 
 BannerView::BannerView() :
-  m_abscissaView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_functionView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
+  Shared::XYBannerView(),
   m_derivativeView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_tangentEquationView(KDFont::SmallFont, I18n::Message::LinearRegressionFormula, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_aView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_bView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_numberOfSubviews(2)
+  m_numberOfSubviews(Shared::XYBannerView::k_numberOfSubviews)
 {
 }
 
 View * BannerView::subviewAtIndex(int index) {
   assert(0 <= index && index < numberOfSubviews());
-  View * subviews[] = {&m_abscissaView, &m_functionView, &m_derivativeView, &m_tangentEquationView, &m_aView, &m_bView};
-  return subviews[index];
+  if (index < Shared::XYBannerView::k_numberOfSubviews) {
+    return Shared::XYBannerView::subviewAtIndex(index);
+  }
+  View * subviews[] = {&m_derivativeView, &m_tangentEquationView, &m_aView, &m_bView};
+  return subviews[index - Shared::XYBannerView::k_numberOfSubviews];
 }
 
 MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 848e23a19..25fcd9163 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -1,11 +1,11 @@
 #ifndef GRAPH_BANNER_VIEW_H
 #define GRAPH_BANNER_VIEW_H
 
-#include "../../shared/banner_view.h"
+#include "../../shared/xy_banner_view.h"
 
 namespace Graph {
 
-class BannerView : public Shared::BannerView {
+class BannerView : public Shared::XYBannerView {
 public:
   BannerView();
   void setNumberOfSubviews(int numberOfSubviews) { m_numberOfSubviews = numberOfSubviews; }
@@ -13,8 +13,6 @@ private:
   int numberOfSubviews() const override { return m_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
-  BufferTextView m_abscissaView;
-  BufferTextView m_functionView;
   BufferTextView m_derivativeView;
   MessageTextView m_tangentEquationView;
   BufferTextView m_aView;
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index ba416ee06..0dcef4485 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -7,9 +7,8 @@ constexpr KDColor BannerView::k_textColor;
 constexpr KDColor BannerView::k_backgroundColor;
 
 BannerView::BannerView() :
+  Shared::XYBannerView(),
   m_dotNameView(k_font, 0.0f, 0.5f, k_textColor, k_backgroundColor),
-  m_xView(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_yView(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
   m_regressionTypeView(k_font, (I18n::Message)0, 0.0f, 0.5f, k_textColor,k_backgroundColor),
   m_subText1(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
   m_subText2(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
@@ -21,7 +20,15 @@ BannerView::BannerView() :
 
 View * BannerView::subviewAtIndex(int index) {
   assert(0 <= index && index < numberOfSubviews());
-  View * subviews[] = {&m_dotNameView, &m_xView, &m_yView, &m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
+  if (index == 0) {
+    return &m_dotNameView;
+  }
+  index--;
+  if (index < Shared::XYBannerView::k_numberOfSubviews) {
+    return Shared::XYBannerView::subviewAtIndex(index);
+  }
+  index -= Shared::XYBannerView::k_numberOfSubviews;
+  View * subviews[] = {&m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
   return subviews[index];
 }
 
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index 0f107c4ab..3987deda1 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -1,12 +1,11 @@
 #ifndef REGRESSION_BANNER_VIEW_H
 #define REGRESSION_BANNER_VIEW_H
 
-#include <escher.h>
-#include "../shared/banner_view.h"
+#include "../shared/xy_banner_view.h"
 
 namespace Regression {
 
-class BannerView : public Shared::BannerView {
+class BannerView : public Shared::XYBannerView {
 public:
   BannerView();
   int numberOfTextviews() const { return k_numberOfSubviews; }
@@ -15,13 +14,11 @@ private:
   static constexpr const KDFont * k_font = KDFont::SmallFont;
   static constexpr KDColor k_textColor = KDColorBlack;
   static constexpr KDColor k_backgroundColor = Palette::GreyMiddle;
-  static constexpr int k_numberOfSubviews = 9;
+  static constexpr int k_numberOfSubviews = Shared::XYBannerView::k_numberOfSubviews + 7;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
   MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_dotNameView;
-  BufferTextView m_xView;
-  BufferTextView m_yView;
   MessageTextView m_regressionTypeView;
   BufferTextView m_subText1;
   BufferTextView m_subText2;
diff --git a/apps/sequence/Makefile b/apps/sequence/Makefile
index 149b48e4e..9f5702e4d 100644
--- a/apps/sequence/Makefile
+++ b/apps/sequence/Makefile
@@ -3,7 +3,6 @@ app_headers += apps/sequence/app.h
 
 app_src += $(addprefix apps/sequence/,\
   app.cpp \
-  graph/banner_view.cpp \
   graph/curve_parameter_controller.cpp \
   graph/curve_view_range.cpp \
   graph/go_to_parameter_controller.cpp \
diff --git a/apps/sequence/graph/banner_view.cpp b/apps/sequence/graph/banner_view.cpp
deleted file mode 100644
index 2b48008d8..000000000
--- a/apps/sequence/graph/banner_view.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#include "banner_view.h"
-#include <assert.h>
-
-namespace Sequence {
-
-BannerView::BannerView() :
-  m_abscissaView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_sequenceView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle)
-{
-}
-
-View * BannerView::subviewAtIndex(int index) {
-  assert(0 <= index && index < numberOfSubviews());
-  View * subviews[] = {&m_abscissaView, &m_sequenceView};
-  return subviews[index];
-}
-
-}
diff --git a/apps/sequence/graph/banner_view.h b/apps/sequence/graph/banner_view.h
deleted file mode 100644
index 6da45ddf4..000000000
--- a/apps/sequence/graph/banner_view.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef SEQUENCE_BANNER_VIEW_H
-#define SEQUENCE_BANNER_VIEW_H
-
-#include <escher.h>
-#include "../../shared/banner_view.h"
-
-namespace Sequence {
-
-class BannerView : public Shared::BannerView {
-public:
-  BannerView();
-private:
-  static constexpr int k_numberOfSubviews = 2;
-  int numberOfSubviews() const override { return k_numberOfSubviews; }
-  View * subviewAtIndex(int index) override;
-  BufferTextView m_abscissaView;
-  BufferTextView m_sequenceView;
-};
-
-}
-
-#endif
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 54d897d5b..8c4ef8700 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -2,7 +2,7 @@
 #define SEQUENCE_GRAPH_CONTROLLER_H
 
 #include "graph_view.h"
-#include "banner_view.h"
+#include "../../shared/xy_banner_view.h"
 #include "curve_parameter_controller.h"
 #include "curve_view_range.h"
 #include "term_sum_controller.h"
@@ -21,7 +21,7 @@ public:
   float interestingXMin() const override;
   float interestingXHalfRange() const override;
 private:
-  BannerView * bannerView() override { return &m_bannerView; }
+  Shared::XYBannerView * bannerView() override { return &m_bannerView; }
   bool handleEnter() override;
   bool moveCursorHorizontally(int direction) override;
   double defaultCursorAbscissa() override;
@@ -33,7 +33,7 @@ private:
   }
   CurveParameterController * curveParameterController() override { return &m_curveParameterController; }
   Shared::CursorView m_cursorView;
-  BannerView m_bannerView;
+  Shared::XYBannerView m_bannerView;
   GraphView m_view;
   CurveViewRange * m_graphRange;
   CurveParameterController m_curveParameterController;
diff --git a/apps/shared/Makefile b/apps/shared/Makefile
index 53d887f1a..0bcee7f82 100644
--- a/apps/shared/Makefile
+++ b/apps/shared/Makefile
@@ -69,5 +69,6 @@ app_src += $(addprefix apps/shared/,\
   values_function_parameter_controller.cpp \
   values_parameter_controller.cpp \
   vertical_cursor_view.cpp \
+  xy_banner_view.cpp\
   zoom_parameter_controller.cpp \
 )
diff --git a/apps/shared/xy_banner_view.cpp b/apps/shared/xy_banner_view.cpp
new file mode 100644
index 000000000..453f8206e
--- /dev/null
+++ b/apps/shared/xy_banner_view.cpp
@@ -0,0 +1,18 @@
+#include "xy_banner_view.h"
+#include <assert.h>
+
+namespace Shared {
+
+XYBannerView::XYBannerView() :
+  m_abscissaView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
+  m_ordinateView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle)
+{
+}
+
+View * XYBannerView::subviewAtIndex(int index) {
+  assert(0 <= index && index < numberOfSubviews());
+  View * subviews[] = {&m_abscissaView, &m_ordinateView};
+  return subviews[index];
+}
+
+}
diff --git a/apps/shared/xy_banner_view.h b/apps/shared/xy_banner_view.h
new file mode 100644
index 000000000..0b5e76e0e
--- /dev/null
+++ b/apps/shared/xy_banner_view.h
@@ -0,0 +1,22 @@
+#ifndef SHARED_XY_BANNER_VIEW_H
+#define SHARED_XY_BANNER_VIEW_H
+
+#include "banner_view.h"
+
+namespace Shared {
+
+class XYBannerView : public BannerView {
+public:
+  XYBannerView();
+  static constexpr int k_numberOfSubviews = 2;
+protected:
+  View * subviewAtIndex(int index) override;
+private:
+  int numberOfSubviews() const override { return k_numberOfSubviews; }
+  BufferTextView m_abscissaView;
+  BufferTextView m_ordinateView;
+};
+
+}
+
+#endif

From 51c36c8f865bdd94b070e3c5f90f0ceb0d106c22 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Feb 2019 11:32:05 +0100
Subject: [PATCH 235/295] [apps/shared] FunctionBannerDelegate::bannerView()
 returns a XYBannerView *

---
 apps/shared/function_banner_delegate.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/shared/function_banner_delegate.h b/apps/shared/function_banner_delegate.h
index ceee40b08..d5fdd85eb 100644
--- a/apps/shared/function_banner_delegate.h
+++ b/apps/shared/function_banner_delegate.h
@@ -2,7 +2,7 @@
 #define SHARED_FUNCTION_BANNER_DELEGATE_H
 
 #include "function_store.h"
-#include "banner_view.h"
+#include "xy_banner_view.h"
 #include "curve_view_cursor.h"
 
 namespace Shared {
@@ -12,7 +12,7 @@ public:
   constexpr static int k_maxNumberOfCharacters = 50;
 protected:
   void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Ion::Storage::Record record, FunctionStore * functionStore, char symbol);
-  virtual BannerView * bannerView() = 0;
+  virtual XYBannerView * bannerView() = 0;
 };
 
 }

From e2be17f1508538df614ed51db8f650466ecadb3c Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Feb 2019 15:44:49 +0100
Subject: [PATCH 236/295] [apps/graph]
 Graph::GraphControllerHelper::BannerView() returns a Graph::BannerView *

Instead of a Shared::BannerView *
---
 apps/graph/graph/graph_controller_helper.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index 57b8b37a2..f6c300cf9 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -1,7 +1,7 @@
 #ifndef GRAPH_GRAPH_CONTROLLER_HELPER_H
 #define GRAPH_GRAPH_CONTROLLER_HELPER_H
 
-#include "../../shared/banner_view.h"
+#include "banner_view.h"
 #include "../../shared/text_field_delegate_app.h"
 #include "../../shared/interactive_curve_view_range.h"
 #include "../cartesian_function_store.h"
@@ -14,7 +14,7 @@ class GraphControllerHelper {
 protected:
   bool privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio);
   void reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, Ion::Storage::Record record, App * app);
-  virtual Shared::BannerView * bannerView() = 0;
+  virtual BannerView * bannerView() = 0;
 };
 
 }

From 07a9116147dc138d398149ee9eb942e3e2ee209e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Feb 2019 14:36:04 +0100
Subject: [PATCH 237/295] [apps/statistics] Remove public
 MultipleDataView::editableBannerView() getter

Instead use existing protected virtual bannerView() getter. The reason
why both existed is that one was const but not the other. A const
variant is needed only exceptionally: in bannerFrame() which is called
by drawRect().
Moreover, bannerView() is virtual and is overridden in its derived
classes using co-variant return types. That fact is important in the
following commit.
---
 apps/statistics/box_controller.cpp         |  6 +++---
 apps/statistics/histogram_controller.cpp   |  6 +++---
 apps/statistics/multiple_boxes_view.h      |  2 +-
 apps/statistics/multiple_data_view.cpp     | 14 +++++++-------
 apps/statistics/multiple_data_view.h       |  3 +--
 apps/statistics/multiple_histograms_view.h |  2 +-
 6 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/apps/statistics/box_controller.cpp b/apps/statistics/box_controller.cpp
index 5d02868a4..861f72532 100644
--- a/apps/statistics/box_controller.cpp
+++ b/apps/statistics/box_controller.cpp
@@ -43,12 +43,12 @@ void BoxController::reloadBannerView() {
   // Set series name
   char seriesChar = '0' + selectedSeriesIndex() + 1;
   char bufferName[] = {' ', 'V', seriesChar, '/', 'N', seriesChar, 0};
-  m_view.editableBannerView()->setLegendAtIndex(bufferName, 0);
+  m_view.bannerView()->setLegendAtIndex(bufferName, 0);
 
 
   // Set calculation name
   I18n::Message calculationName[5] = {I18n::Message::Minimum, I18n::Message::FirstQuartile, I18n::Message::Median, I18n::Message::ThirdQuartile, I18n::Message::Maximum};
-  m_view.editableBannerView()->setMessageAtIndex(calculationName[selectedQuantile], 1);
+  m_view.bannerView()->setMessageAtIndex(calculationName[selectedQuantile], 1);
 
   // Set calculation result
   assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
@@ -60,7 +60,7 @@ void BoxController::reloadBannerView() {
   int numberOfChar = PoincareHelpers::ConvertFloatToText<double>(calculation, buffer, bufferSize - 1, Constant::LargeNumberOfSignificantDigits);
   buffer[numberOfChar++] = ' ';
   buffer[numberOfChar] = 0;
-  m_view.editableBannerView()->setLegendAtIndex(buffer, 2);
+  m_view.bannerView()->setLegendAtIndex(buffer, 2);
 }
 
 }
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index e8dc3c9dd..90e033036 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -124,7 +124,7 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxIntervalLegendLength] = 0;
-  m_view.editableBannerView()->setLegendAtIndex(buffer, 1);
+  m_view.bannerView()->setLegendAtIndex(buffer, 1);
 
   // Add Size Data
   numberOfChar = 0;
@@ -142,7 +142,7 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
-  m_view.editableBannerView()->setLegendAtIndex(buffer, 3);
+  m_view.bannerView()->setLegendAtIndex(buffer, 3);
 
   // Add Frequency Data
   numberOfChar = 0;
@@ -159,7 +159,7 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
-  m_view.editableBannerView()->setLegendAtIndex(buffer, 5);
+  m_view.bannerView()->setLegendAtIndex(buffer, 5);
 }
 
 bool HistogramController::moveSelectionHorizontally(int deltaIndex) {
diff --git a/apps/statistics/multiple_boxes_view.h b/apps/statistics/multiple_boxes_view.h
index 1ca98e8d9..3333907a3 100644
--- a/apps/statistics/multiple_boxes_view.h
+++ b/apps/statistics/multiple_boxes_view.h
@@ -17,7 +17,7 @@ public:
   MultipleBoxesView(Store * store, BoxView::Quantile * selectedQuantile);
   // MultipleDataView
   int seriesOfSubviewAtIndex(int index) override;
-  const BoxBannerView * bannerView() const override { return &m_bannerView; }
+  BoxBannerView * bannerView() override { return &m_bannerView; }
   BoxView * dataViewAtIndex(int index) override;
   void layoutDataSubviews() override;
   void reload() override;
diff --git a/apps/statistics/multiple_data_view.cpp b/apps/statistics/multiple_data_view.cpp
index dfc81f10d..5caed52eb 100644
--- a/apps/statistics/multiple_data_view.cpp
+++ b/apps/statistics/multiple_data_view.cpp
@@ -49,7 +49,7 @@ int MultipleDataView::numberOfSubviews() const {
 
 View * MultipleDataView::subviewAtIndex(int index) {
   if (index == MultipleDataView::numberOfSubviews() -1) {
-    return editableBannerView();
+    return bannerView();
   }
   int seriesIndex = 0;
   int nonEmptySeriesIndex = -1;
@@ -68,7 +68,7 @@ View * MultipleDataView::subviewAtIndex(int index) {
 
 void MultipleDataView::layoutSubviews() {
   // We need to set the banner width first, so its height can be computed
-  editableBannerView()->setFrame(KDRect(0, 0, bounds().width(), 0));
+  bannerView()->setFrame(KDRect(0, 0, bounds().width(), 0));
   layoutDataSubviews();
   layoutBanner();
 }
@@ -76,7 +76,7 @@ void MultipleDataView::layoutSubviews() {
 void MultipleDataView::layoutDataSubviews() {
   int numberDataSubviews = m_store->numberOfNonEmptySeries();
   assert(numberDataSubviews > 0);
-  KDCoordinate bannerHeight = bannerFrame().height();
+  KDCoordinate bannerHeight = bannerView()->minimalSizeForOptimalDisplay().height();
   KDCoordinate subviewHeight = (bounds().height() - bannerHeight)/numberDataSubviews + 1; // +1 to make sure that all pixel rows are drawn
   int displayedSubviewIndex = 0;
   for (int i = 0; i < Store::k_numberOfSeries; i++) {
@@ -95,18 +95,18 @@ void MultipleDataView::changeDataViewSelection(int index, bool select) {
 }
 
 KDRect MultipleDataView::bannerFrame() const {
-  KDCoordinate bannerHeight = bannerView()->minimalSizeForOptimalDisplay().height();
+  KDCoordinate bannerHeight = const_cast<MultipleDataView *>(this)->bannerView()->minimalSizeForOptimalDisplay().height();
   KDRect frame = KDRect(0, bounds().height() - bannerHeight, bounds().width(), bannerHeight);
   return frame;
 }
 
 void MultipleDataView::layoutBanner() {
-  KDCoordinate bannerHeight = bannerFrame().height();
+  KDCoordinate bannerHeight = bannerView()->minimalSizeForOptimalDisplay().height();
   if (m_displayBanner) {
-    editableBannerView()->setFrame(bannerFrame());
+    bannerView()->setFrame(bannerFrame());
   } else {
     KDRect frame = KDRect(0, bounds().height() - bannerHeight, bounds().width(), 0);
-    editableBannerView()->setFrame(frame);
+    bannerView()->setFrame(frame);
   }
 }
 
diff --git a/apps/statistics/multiple_data_view.h b/apps/statistics/multiple_data_view.h
index dacb3705f..e2b9eae0b 100644
--- a/apps/statistics/multiple_data_view.h
+++ b/apps/statistics/multiple_data_view.h
@@ -19,7 +19,6 @@ public:
   void selectDataView(int index);
   void deselectDataView(int index);
   virtual Shared::CurveView * dataViewAtIndex(int index) = 0;
-  Shared::BannerView * editableBannerView() { return const_cast<Shared::BannerView *>(bannerView()); }
 
   // Index/series
   int indexOfSubviewAtSeries(int series);
@@ -32,7 +31,7 @@ public:
   // View
   int numberOfSubviews() const override;
 protected:
-  virtual const Shared::BannerView * bannerView() const = 0;
+  virtual Shared::BannerView * bannerView() = 0;
   void layoutSubviews() override;
   virtual void layoutDataSubviews();
   View * subviewAtIndex(int index) override;
diff --git a/apps/statistics/multiple_histograms_view.h b/apps/statistics/multiple_histograms_view.h
index 34d02e041..de41f0d3b 100644
--- a/apps/statistics/multiple_histograms_view.h
+++ b/apps/statistics/multiple_histograms_view.h
@@ -16,7 +16,7 @@ public:
   MultipleHistogramsView(HistogramController * controller, Store * store);
   // MultipleDataView
   int seriesOfSubviewAtIndex(int index) override;
-  const HistogramBannerView * bannerView() const override { return &m_bannerView; }
+  HistogramBannerView * bannerView() override { return &m_bannerView; }
   HistogramView * dataViewAtIndex(int index) override;
 private:
   void layoutSubviews() override;

From 205ae8fec53571ab6922b5fff50efdcba8a831b0 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 21 Feb 2019 14:03:26 +0100
Subject: [PATCH 238/295] [apps] Remove BannerView::messageTextViewAtIndex
 method

---
 apps/graph/graph/banner_view.cpp          | 7 -------
 apps/graph/graph/banner_view.h            | 1 -
 apps/regression/banner_view.cpp           | 7 -------
 apps/regression/banner_view.h             | 1 -
 apps/shared/banner_view.cpp               | 7 +------
 apps/shared/banner_view.h                 | 1 -
 apps/statistics/box_banner_view.cpp       | 4 ----
 apps/statistics/box_banner_view.h         | 1 -
 apps/statistics/histogram_banner_view.cpp | 5 -----
 apps/statistics/histogram_banner_view.h   | 1 -
 10 files changed, 1 insertion(+), 34 deletions(-)

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index 813d1d989..7c22d99ee 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -23,11 +23,4 @@ View * BannerView::subviewAtIndex(int index) {
   return subviews[index - Shared::XYBannerView::k_numberOfSubviews];
 }
 
-MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
-  if (i == 3) {
-    return (MessageTextView *)&m_tangentEquationView;
-  }
-  return nullptr;
-}
-
 }
diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 25fcd9163..6d502b39a 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -12,7 +12,6 @@ public:
 private:
   int numberOfSubviews() const override { return m_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
-  MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_derivativeView;
   MessageTextView m_tangentEquationView;
   BufferTextView m_aView;
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index 0dcef4485..1780cc68f 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -32,11 +32,4 @@ View * BannerView::subviewAtIndex(int index) {
   return subviews[index];
 }
 
-MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
-  if (i == 3) {
-    return (MessageTextView *)&m_regressionTypeView;
-  }
-  return nullptr;
-}
-
 }
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index 3987deda1..64fed0e06 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -17,7 +17,6 @@ private:
   static constexpr int k_numberOfSubviews = Shared::XYBannerView::k_numberOfSubviews + 7;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
-  MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_dotNameView;
   MessageTextView m_regressionTypeView;
   BufferTextView m_subText1;
diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 420768248..83cdbad45 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -19,8 +19,7 @@ void BannerView::setLegendAtIndex(char * text, int index) {
 }
 
 void BannerView::setMessageAtIndex(I18n::Message text, int index) {
-  MessageTextView * textView = messageTextViewAtIndex(index);
-  textView->setMessage(text);
+  static_cast<MessageTextView *>(subviewAtIndex(index))->setMessage(text);
   layoutSubviews();
 }
 
@@ -86,8 +85,4 @@ int BannerView::numberOfLines() const {
   return lineNumber+1;
 }
 
-MessageTextView * BannerView::messageTextViewAtIndex(int i) const {
-  return nullptr;
-}
-
 }
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index ddad0f20a..312701350 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -16,7 +16,6 @@ private:
   View * subviewAtIndex(int index) override = 0;
   void layoutSubviews() override;
   int numberOfLines() const;
-  virtual MessageTextView * messageTextViewAtIndex(int i) const;
 };
 
 }
diff --git a/apps/statistics/box_banner_view.cpp b/apps/statistics/box_banner_view.cpp
index 68d93882d..0dc664892 100644
--- a/apps/statistics/box_banner_view.cpp
+++ b/apps/statistics/box_banner_view.cpp
@@ -16,8 +16,4 @@ View * BoxBannerView::subviewAtIndex(int index) {
   return subviews[index];
 }
 
-MessageTextView * BoxBannerView::messageTextViewAtIndex(int index) const {
-  return index == 1 ? (MessageTextView *)&m_calculationName : nullptr;
-}
-
 }
diff --git a/apps/statistics/box_banner_view.h b/apps/statistics/box_banner_view.h
index 40beaa286..1f1d87672 100644
--- a/apps/statistics/box_banner_view.h
+++ b/apps/statistics/box_banner_view.h
@@ -14,7 +14,6 @@ private:
   static constexpr int k_numberOfSubviews = 3;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
-  MessageTextView * messageTextViewAtIndex(int i) const override;
   BufferTextView m_seriesName;
   MessageTextView m_calculationName;
   BufferTextView m_calculationValue;
diff --git a/apps/statistics/histogram_banner_view.cpp b/apps/statistics/histogram_banner_view.cpp
index 224fa210e..6609d8e09 100644
--- a/apps/statistics/histogram_banner_view.cpp
+++ b/apps/statistics/histogram_banner_view.cpp
@@ -20,9 +20,4 @@ View * HistogramBannerView::subviewAtIndex(int index) {
   return subviews[index];
 }
 
-MessageTextView * HistogramBannerView::messageTextViewAtIndex(int index) const {
-  const MessageTextView * textViews[k_numberOfSubviews] = {&m_intervalLegendView, nullptr, &m_sizeLegendView, nullptr, &m_frequencyLegendView, nullptr};
-  return (MessageTextView *)textViews[index];
-}
-
 }
diff --git a/apps/statistics/histogram_banner_view.h b/apps/statistics/histogram_banner_view.h
index b02e11423..7f9e30d0f 100644
--- a/apps/statistics/histogram_banner_view.h
+++ b/apps/statistics/histogram_banner_view.h
@@ -14,7 +14,6 @@ private:
   static constexpr int k_numberOfSubviews = 6;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
-  MessageTextView * messageTextViewAtIndex(int index) const override;
   MessageTextView m_intervalLegendView;
   BufferTextView m_intervalView;
   MessageTextView m_sizeLegendView;

From 355e42734d200e5f3a111a6498ace23e6351811b Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 5 Mar 2019 09:51:57 +0100
Subject: [PATCH 239/295] [apps] Replace BannerView::set(Legend|Message)AtIndex
 by getters

---
 apps/graph/graph/banner_view.h                |  3 ++
 apps/graph/graph/graph_controller_helper.cpp  |  3 +-
 .../graph/intersection_graph_controller.cpp   |  3 +-
 apps/graph/graph/tangent_graph_controller.cpp |  5 ++--
 apps/regression/banner_view.cpp               | 16 +++++++---
 apps/regression/banner_view.h                 |  7 +++--
 apps/regression/graph_controller.cpp          | 30 +++++++++----------
 apps/shared/banner_view.cpp                   | 16 ----------
 apps/shared/banner_view.h                     |  3 +-
 apps/shared/function_banner_delegate.cpp      |  6 ++--
 apps/shared/xy_banner_view.h                  |  2 ++
 apps/statistics/box_banner_view.h             |  3 ++
 apps/statistics/box_controller.cpp            |  9 +++---
 apps/statistics/histogram_banner_view.h       |  3 ++
 apps/statistics/histogram_controller.cpp      |  8 +++--
 15 files changed, 65 insertions(+), 52 deletions(-)

diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 6d502b39a..d9a3f3416 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -8,6 +8,9 @@ namespace Graph {
 class BannerView : public Shared::XYBannerView {
 public:
   BannerView();
+  BufferTextView * derivativeView() { return &m_derivativeView; }
+  BufferTextView * aView() { return &m_aView; }
+  BufferTextView * bView() { return &m_bView; }
   void setNumberOfSubviews(int numberOfSubviews) { m_numberOfSubviews = numberOfSubviews; }
 private:
   int numberOfSubviews() const override { return m_numberOfSubviews; }
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index 6928bf865..65d3ac8b4 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -30,7 +30,8 @@ void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shar
   double y = function->approximateDerivative(cursor->x(), app->localContext());
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(y, buffer + numberOfChar, bufferSize-numberOfChar, Constant::ShortNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
-  bannerView()->setLegendAtIndex(buffer, 2);
+  bannerView()->derivativeView()->setText(buffer);
+  bannerView()->reload();
 }
 
 }
diff --git a/apps/graph/graph/intersection_graph_controller.cpp b/apps/graph/graph/intersection_graph_controller.cpp
index bb28f6076..1994430b8 100644
--- a/apps/graph/graph/intersection_graph_controller.cpp
+++ b/apps/graph/graph/intersection_graph_controller.cpp
@@ -33,7 +33,8 @@ void IntersectionGraphController::reloadBannerView() {
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(m_cursor->y(), buffer+numberOfChar, bufferSize-numberOfChar, Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
-  bannerView()->setLegendAtIndex(buffer, 1);
+  bannerView()->ordinateView()->setText(buffer);
+  bannerView()->reload();
 }
 
 Poincare::Expression::Coordinate2D IntersectionGraphController::computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) {
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index 7032cc726..79a79dd9b 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -49,13 +49,14 @@ void TangentGraphController::reloadBannerView() {
   ExpiringPointer<CartesianFunction> function = myApp->functionStore()->modelForRecord(m_record);
   double y = function->approximateDerivative(m_cursor->x(), myApp->localContext());
   PoincareHelpers::ConvertFloatToText<double>(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
-  m_bannerView->setLegendAtIndex(buffer, 4);
+  m_bannerView->aView()->setText(buffer);
 
   legend = "b=";
   legendLength = strlcpy(buffer, legend, bufferSize);
   y = -y*m_cursor->x()+function->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
   PoincareHelpers::ConvertFloatToText<double>(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
-  m_bannerView->setLegendAtIndex(buffer, 5);
+  m_bannerView->bView()->setText(buffer);
+  m_bannerView->reload();
 }
 
 bool TangentGraphController::moveCursorHorizontally(int direction) {
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index 1780cc68f..69fbccb6b 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -10,14 +10,20 @@ BannerView::BannerView() :
   Shared::XYBannerView(),
   m_dotNameView(k_font, 0.0f, 0.5f, k_textColor, k_backgroundColor),
   m_regressionTypeView(k_font, (I18n::Message)0, 0.0f, 0.5f, k_textColor,k_backgroundColor),
+  m_subText0(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
   m_subText1(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
   m_subText2(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
   m_subText3(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText4(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText5(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor)
+  m_subText4(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor)
 {
 }
 
+BufferTextView * BannerView::subTextAtIndex(int index) {
+  assert(0 <= index && index < numberOfsubTexts());
+  BufferTextView * subTexts[numberOfsubTexts()] = {&m_subText0, &m_subText1, &m_subText2, &m_subText3, &m_subText4};
+  return subTexts[index];
+}
+
 View * BannerView::subviewAtIndex(int index) {
   assert(0 <= index && index < numberOfSubviews());
   if (index == 0) {
@@ -28,8 +34,10 @@ View * BannerView::subviewAtIndex(int index) {
     return Shared::XYBannerView::subviewAtIndex(index);
   }
   index -= Shared::XYBannerView::k_numberOfSubviews;
-  View * subviews[] = {&m_regressionTypeView, &m_subText1, &m_subText2, &m_subText3, &m_subText4, &m_subText5};
-  return subviews[index];
+  if (index == 0) {
+    return &m_regressionTypeView;
+  }
+  return subTextAtIndex(index - 1);
 }
 
 }
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index 64fed0e06..b48496e1b 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -8,7 +8,10 @@ namespace Regression {
 class BannerView : public Shared::XYBannerView {
 public:
   BannerView();
-  int numberOfTextviews() const { return k_numberOfSubviews; }
+  BufferTextView * dotNameView() { return &m_dotNameView; }
+  MessageTextView * regressionTypeView() { return &m_regressionTypeView; }
+  BufferTextView * subTextAtIndex(int index);
+  static constexpr int numberOfsubTexts() { return 5; }
   const KDFont * font() const { return k_font; }
 private:
   static constexpr const KDFont * k_font = KDFont::SmallFont;
@@ -19,11 +22,11 @@ private:
   View * subviewAtIndex(int index) override;
   BufferTextView m_dotNameView;
   MessageTextView m_regressionTypeView;
+  BufferTextView m_subText0;
   BufferTextView m_subText1;
   BufferTextView m_subText2;
   BufferTextView m_subText3;
   BufferTextView m_subText4;
-  BufferTextView m_subText5;
 };
 
 }
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 04be6f253..b4da31972 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -113,7 +113,7 @@ void GraphController::reloadBannerView() {
   legend = ")  ";
   strlcpy(buffer+numberOfChar, legend, bufferSize - numberOfChar);
   buffer[k_maxLegendLength] = 0;
-  m_bannerView.setLegendAtIndex(buffer, 0);
+  m_bannerView.dotNameView()->setText(buffer);
 
   // Set "x=..." or "xmean=..."
   numberOfChar = 0;
@@ -132,7 +132,7 @@ void GraphController::reloadBannerView() {
     buffer[numberOfChar++] = ' ';
   }
   buffer[k_maxLegendLength] = 0;
-  m_bannerView.setLegendAtIndex(buffer, 1);
+  m_bannerView.abscissaView()->setText(buffer);
 
   // Set "y=..." or "ymean=..."
   numberOfChar = 0;
@@ -149,12 +149,12 @@ void GraphController::reloadBannerView() {
     buffer[numberOfChar++] = ' ';
   }
   buffer[k_maxLegendLength] = 0;
-  m_bannerView.setLegendAtIndex(buffer, 2);
+  m_bannerView.ordinateView()->setText(buffer);
 
   // Set formula
   Model * model = m_store->modelForSeries(selectedSeriesIndex());
   I18n::Message formula = model->formulaMessage();
-  m_bannerView.setMessageAtIndex(formula, 3);
+  m_bannerView.regressionTypeView()->setMessage(formula);
 
   // Get the coefficients
   double * coefficients = m_store->coefficientsForSeries(selectedSeriesIndex(), globalContext());
@@ -173,13 +173,12 @@ void GraphController::reloadBannerView() {
       buffer[numberOfChar++] = ' ';
     }
     buffer[numberOfChar] = 0;
-    m_bannerView.setLegendAtIndex(buffer, 4);
+    m_bannerView.subTextAtIndex(0)->setText(buffer);
 
     const char * dataNotSuitableMessage = I18n::translate(I18n::Message::DataNotSuitableForRegression);
-    m_bannerView.setLegendAtIndex(const_cast<char *>(dataNotSuitableMessage), 5);
-    for (int i = 6; i < m_bannerView.numberOfTextviews(); i++) {
-      char empty[] = {0};
-      m_bannerView.setLegendAtIndex(empty, i);
+    m_bannerView.subTextAtIndex(1)->setText(const_cast<char *>(dataNotSuitableMessage));
+    for (int i = 2; i < m_bannerView.numberOfsubTexts(); i++) {
+      m_bannerView.subTextAtIndex(i)->setText("");
     }
     return;
   }
@@ -191,7 +190,7 @@ void GraphController::reloadBannerView() {
     numberOfChar += strlcpy(buffer, legend, bufferSize);
     numberOfChar += PoincareHelpers::ConvertFloatToText<double>(coefficients[i], buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
     buffer[k_maxLegendLength] = 0;
-    m_bannerView.setLegendAtIndex(buffer, 4 + i);
+    m_bannerView.subTextAtIndex(i)->setText(buffer);
     coefficientName++;
   }
 
@@ -203,7 +202,7 @@ void GraphController::reloadBannerView() {
     numberOfChar += strlcpy(buffer, legend, bufferSize);
     numberOfChar += PoincareHelpers::ConvertFloatToText<double>(r, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
     buffer[k_maxLegendLength+10] = 0;
-    m_bannerView.setLegendAtIndex(buffer, 6);
+    m_bannerView.subTextAtIndex(2)->setText(buffer);
 
     // Set "r2=..."
     numberOfChar = 0;
@@ -212,19 +211,20 @@ void GraphController::reloadBannerView() {
     numberOfChar += strlcpy(buffer, legend, bufferSize);
     numberOfChar += PoincareHelpers::ConvertFloatToText<double>(r2, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits);
     buffer[k_maxLegendLength] = 0;
-    m_bannerView.setLegendAtIndex(buffer, 7);
+    m_bannerView.subTextAtIndex(3)->setText(buffer);
 
     // Clean the last subview
     buffer[0] = 0;
-    m_bannerView.setLegendAtIndex(buffer, 8);
+    m_bannerView.subTextAtIndex(4)->setText(buffer);
 
   } else {
     // Empty all non used subviews
-    for (int i = 4+model->numberOfCoefficients(); i < m_bannerView.numberOfTextviews(); i++) {
+    for (int i = model->numberOfCoefficients(); i < m_bannerView.numberOfsubTexts(); i++) {
       buffer[0] = 0;
-      m_bannerView.setLegendAtIndex(buffer, i);
+      m_bannerView.subTextAtIndex(i)->setText(buffer);
     }
   }
+  m_bannerView.reload();
 }
 
 bool GraphController::moveCursorHorizontally(int direction) {
diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 83cdbad45..0f7ff8af2 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -7,22 +7,6 @@ KDCoordinate BannerView::HeightGivenNumberOfLines(int linesCount) {
   return KDFont::SmallFont->glyphSize().height()*linesCount;
 }
 
-void BannerView::setLegendAtIndex(char * text, int index) {
-  /* The layout of the banner's subviews depends on their content.
-   * Indeed, we're using a "centered text" algorithm to layout the subviews.
-   * So changing a legend implies two things
-   *  - First, we need to update the textView to ensure it has the new content
-   *  - Second, we need to relayout *all* of our subviews. */
-  TextView * textView = static_cast<TextView *>(subviewAtIndex(index));
-  textView->setText(text);
-  layoutSubviews();
-}
-
-void BannerView::setMessageAtIndex(I18n::Message text, int index) {
-  static_cast<MessageTextView *>(subviewAtIndex(index))->setMessage(text);
-  layoutSubviews();
-}
-
 KDSize BannerView::minimalSizeForOptimalDisplay() const {
   return KDSize(0, HeightGivenNumberOfLines(numberOfLines()));
 }
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index 312701350..b659b9cc9 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -8,9 +8,8 @@ namespace Shared {
 class BannerView : public View {
 public:
   static KDCoordinate HeightGivenNumberOfLines(int linesCount);
-  void setLegendAtIndex(char * text, int index);
-  void setMessageAtIndex(I18n::Message text, int index);
   KDSize minimalSizeForOptimalDisplay() const override;
+  void reload() { layoutSubviews(); }
 private:
   int numberOfSubviews() const override = 0;
   View * subviewAtIndex(int index) override = 0;
diff --git a/apps/shared/function_banner_delegate.cpp b/apps/shared/function_banner_delegate.cpp
index 5775174ad..3d8b5968d 100644
--- a/apps/shared/function_banner_delegate.cpp
+++ b/apps/shared/function_banner_delegate.cpp
@@ -19,7 +19,7 @@ void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor
   buffer[0] = symbol;
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize - numberOfChar);
-  bannerView()->setLegendAtIndex(buffer, 0);
+  bannerView()->abscissaView()->setText(buffer);
 
   numberOfChar = 0;
   numberOfChar += function->nameWithArgument(buffer, bufferSize, symbol);
@@ -27,7 +27,9 @@ void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor
   numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->y(), buffer+numberOfChar, bufferSize-numberOfChar, Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
-  bannerView()->setLegendAtIndex(buffer, 1);
+  bannerView()->ordinateView()->setText(buffer);
+
+  bannerView()->reload();
 }
 
 }
diff --git a/apps/shared/xy_banner_view.h b/apps/shared/xy_banner_view.h
index 0b5e76e0e..5b13aa2fd 100644
--- a/apps/shared/xy_banner_view.h
+++ b/apps/shared/xy_banner_view.h
@@ -8,6 +8,8 @@ namespace Shared {
 class XYBannerView : public BannerView {
 public:
   XYBannerView();
+  BufferTextView * abscissaView() { return &m_abscissaView; }
+  BufferTextView * ordinateView() { return &m_ordinateView; }
   static constexpr int k_numberOfSubviews = 2;
 protected:
   View * subviewAtIndex(int index) override;
diff --git a/apps/statistics/box_banner_view.h b/apps/statistics/box_banner_view.h
index 1f1d87672..d2e98cf0a 100644
--- a/apps/statistics/box_banner_view.h
+++ b/apps/statistics/box_banner_view.h
@@ -10,6 +10,9 @@ namespace Statistics {
 class BoxBannerView : public Shared::BannerView {
 public:
   BoxBannerView();
+  BufferTextView * seriesName() { return &m_seriesName; }
+  MessageTextView * calculationName() { return &m_calculationName; }
+  BufferTextView * calculationValue() { return &m_calculationValue; }
 private:
   static constexpr int k_numberOfSubviews = 3;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
diff --git a/apps/statistics/box_controller.cpp b/apps/statistics/box_controller.cpp
index 861f72532..2e26b3565 100644
--- a/apps/statistics/box_controller.cpp
+++ b/apps/statistics/box_controller.cpp
@@ -43,12 +43,11 @@ void BoxController::reloadBannerView() {
   // Set series name
   char seriesChar = '0' + selectedSeriesIndex() + 1;
   char bufferName[] = {' ', 'V', seriesChar, '/', 'N', seriesChar, 0};
-  m_view.bannerView()->setLegendAtIndex(bufferName, 0);
-
+  m_view.bannerView()->seriesName()->setText(bufferName);
 
   // Set calculation name
   I18n::Message calculationName[5] = {I18n::Message::Minimum, I18n::Message::FirstQuartile, I18n::Message::Median, I18n::Message::ThirdQuartile, I18n::Message::Maximum};
-  m_view.bannerView()->setMessageAtIndex(calculationName[selectedQuantile], 1);
+  m_view.bannerView()->calculationName()->setMessage(calculationName[selectedQuantile]);
 
   // Set calculation result
   assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
@@ -60,7 +59,9 @@ void BoxController::reloadBannerView() {
   int numberOfChar = PoincareHelpers::ConvertFloatToText<double>(calculation, buffer, bufferSize - 1, Constant::LargeNumberOfSignificantDigits);
   buffer[numberOfChar++] = ' ';
   buffer[numberOfChar] = 0;
-  m_view.bannerView()->setLegendAtIndex(buffer, 2);
+  m_view.bannerView()->calculationValue()->setText(buffer);
+
+  m_view.bannerView()->reload();
 }
 
 }
diff --git a/apps/statistics/histogram_banner_view.h b/apps/statistics/histogram_banner_view.h
index 7f9e30d0f..84e96896f 100644
--- a/apps/statistics/histogram_banner_view.h
+++ b/apps/statistics/histogram_banner_view.h
@@ -10,6 +10,9 @@ namespace Statistics {
 class HistogramBannerView : public Shared::BannerView {
 public:
   HistogramBannerView();
+  BufferTextView * intervalView() { return &m_intervalView; }
+  BufferTextView * sizeView() { return &m_sizeView; }
+  BufferTextView * frequencyView() { return &m_frequencyView; }
 private:
   static constexpr int k_numberOfSubviews = 6;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index 90e033036..70d02ac1d 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -124,7 +124,7 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxIntervalLegendLength] = 0;
-  m_view.bannerView()->setLegendAtIndex(buffer, 1);
+  m_view.bannerView()->intervalView()->setText(buffer);
 
   // Add Size Data
   numberOfChar = 0;
@@ -142,7 +142,7 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
-  m_view.bannerView()->setLegendAtIndex(buffer, 3);
+  m_view.bannerView()->sizeView()->setText(buffer);
 
   // Add Frequency Data
   numberOfChar = 0;
@@ -159,7 +159,9 @@ void HistogramController::reloadBannerView() {
     numberOfChar+= UTF8Decoder::CodePointToChars(' ', buffer + numberOfChar, bufferSize - numberOfChar);
   }
   buffer[k_maxLegendLength] = 0;
-  m_view.bannerView()->setLegendAtIndex(buffer, 5);
+  m_view.bannerView()->frequencyView()->setText(buffer);
+
+  m_view.bannerView()->reload();
 }
 
 bool HistogramController::moveSelectionHorizontally(int deltaIndex) {

From 211ae05667f4ce5b2bcb6d4097899e1145be1d43 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Mar 2019 17:32:07 +0100
Subject: [PATCH 240/295] [apps/shared] Clean SumGraphController

---
 apps/shared/sum_graph_controller.cpp | 64 +++++++---------------------
 apps/shared/sum_graph_controller.h   |  4 +-
 2 files changed, 16 insertions(+), 52 deletions(-)

diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 5d18a4106..be632a886 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -1,7 +1,8 @@
 #include "sum_graph_controller.h"
 #include "function_app.h"
 #include "../apps_container.h"
-#include <poincare_layouts.h>
+#include <poincare/empty_layout.h>
+#include <poincare/condensed_sum_layout.h>
 #include <poincare/layout_helper.h>
 #include "poincare_helpers.h"
 
@@ -61,14 +62,12 @@ bool SumGraphController::handleEvent(Ion::Events::Event event) {
       return false;
     }
     if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), -1))) {
-      m_graphView->reload();
       return true;
     }
     return false;
   }
   if (event == Ion::Events::Right && !m_legendView.textField()->isEditing()) {
     if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), 1))) {
-      m_graphView->reload();
       return true;
     }
     return false;
@@ -83,7 +82,6 @@ bool SumGraphController::handleEvent(Ion::Events::Event event) {
       app()->setFirstResponder(m_legendView.textField());
       m_graphView->setAreaHighlightColor(false);
       m_graphView->setCursorView(&m_cursorView);
-      m_endSum = m_cursor->x();
       m_legendView.setEditableZone(m_endSum);
       m_legendView.setSumSymbol(m_step, m_startSum);
     }
@@ -93,7 +91,6 @@ bool SumGraphController::handleEvent(Ion::Events::Event event) {
       m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
       m_legendView.setEditableZone(m_startSum);
       m_legendView.setSumSymbol(m_step);
-      m_graphView->reload();
     }
     return true;
   }
@@ -108,14 +105,14 @@ bool SumGraphController::moveCursorHorizontallyToPosition(double x) {
   m_cursor->moveTo(x, y);
   if (m_step == Step::FirstParameter) {
     m_startSum = m_cursor->x();
-    m_legendView.setEditableZone(m_startSum);
   }
   if (m_step == Step::SecondParameter) {
-    m_graphView->setAreaHighlight(m_startSum, m_cursor->x());
     m_endSum = m_cursor->x();
-    m_legendView.setEditableZone(m_endSum);
+    m_graphView->setAreaHighlight(m_startSum, m_endSum);
   }
+  m_legendView.setEditableZone(m_cursor->x());
   m_graphRange->panToMakePointVisible(x, y, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphView->reload();
   return true;
 }
 
@@ -132,34 +129,15 @@ bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const
     app()->displayWarning(I18n::Message::UndefinedValue);
     return false;
   }
-  if (m_step == Step::SecondParameter && floatBody < m_startSum) {
+  if ((m_step == Step::SecondParameter && floatBody < m_startSum) || !moveCursorHorizontallyToPosition(floatBody)) {
     app()->displayWarning(I18n::Message::ForbiddenValue);
     return false;
   }
-  if (moveCursorHorizontallyToPosition(floatBody)) {
-    handleEnter();
-    m_graphView->reload();
-    return true;
-  }
-  app()->displayWarning(I18n::Message::ForbiddenValue);
-  return false;
+  return handleEnter();
 }
 
 bool SumGraphController::textFieldDidAbortEditing(TextField * textField) {
-  char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
-  double parameter = NAN;
-  switch(m_step) {
-    case Step::FirstParameter:
-      parameter = m_startSum;
-      break;
-    case Step::SecondParameter:
-      parameter = m_endSum;
-      break;
-    default:
-      assert(false);
-  }
-  PrintFloat::convertFloatToText<double>(parameter, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-  textField->setText(buffer);
+  m_legendView.setEditableZone(m_cursor->x());
   return true;
 }
 
@@ -167,9 +145,6 @@ bool SumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Ev
   if ((event == Ion::Events::OK || event == Ion::Events::EXE) && !textField->isEditing()) {
     return handleEnter();
   }
-  if (m_step == Step::Result) {
-    return handleEvent(event);
-  }
   return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
 }
 
@@ -248,7 +223,7 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
   } else {
     char buffer[2+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
     PrintFloat::convertFloatToText<double>(start, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
-    Layout start = LayoutHelper::String(buffer, strlen(buffer), KDFont::SmallFont);
+    Layout start = LayoutHelper::String(buffer, strlen(buffer), k_font);
     PrintFloat::convertFloatToText<double>(end, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, Preferences::PrintFloatMode::Decimal);
     Layout end = LayoutHelper::String(buffer, strlen(buffer), k_font);
     m_sumLayout = CondensedSumLayout::Builder(
@@ -271,10 +246,6 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
   layoutSubviews(step);
 }
 
-int SumGraphController::LegendView::numberOfSubviews() const {
-  return 3;
-}
-
 View * SumGraphController::LegendView::subviewAtIndex(int index) {
   assert(index >= 0 && index < 3);
   if (index == 0) {
@@ -303,17 +274,12 @@ void SumGraphController::LegendView::layoutSubviews(Step step) {
     m_legend.setFrame(KDRectZero);
   }
 
-  KDSize largeCharSize = KDFont::LargeFont->glyphSize();
-  switch(step) {
-    case Step::FirstParameter:
-      m_editableZone.setFrame(KDRect(2*largeCharSize.width(), k_symbolHeightMargin+k_sigmaHeight/2, editableZoneWidth(), editableZoneHeight()));
-      return;
-    case Step::SecondParameter:
-      m_editableZone.setFrame(KDRect(2*largeCharSize.width(), k_symbolHeightMargin+k_sigmaHeight/2-editableZoneHeight(), editableZoneWidth(), editableZoneHeight()));
-      return;
-    default:
-      m_editableZone.setFrame(KDRectZero);
-  }
+  KDRect frame = (step == Step::Result) ? KDRectZero : KDRect(
+    2 * KDFont::LargeFont->glyphSize().width(),
+    k_symbolHeightMargin + k_sigmaHeight/2 - (step == Step::SecondParameter) * editableZoneHeight(),
+    editableZoneWidth(), editableZoneHeight()
+  );
+  m_editableZone.setFrame(frame);
 }
 
 }
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 9e69a3d30..dd9fa5052 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -3,9 +3,7 @@
 
 #include <escher.h>
 #include "function_graph_view.h"
-#include "interactive_curve_view_range.h"
 #include "vertical_cursor_view.h"
-#include "curve_view_cursor.h"
 #include "simple_interactive_curve_view_controller.h"
 #include "function.h"
 #include "text_field_delegate.h"
@@ -67,7 +65,7 @@ private:
     static KDCoordinate editableZoneHeight() { return k_font->glyphSize().height(); }
     constexpr static KDCoordinate k_symbolHeightMargin = 8;
     constexpr static KDCoordinate k_sigmaHeight = 18;
-    int numberOfSubviews() const override;
+    int numberOfSubviews() const override { return 3; }
     View * subviewAtIndex(int index) override;
     void layoutSubviews() override;
     void layoutSubviews(Step step);

From e47ab69e533df2e5585048848de140ab0be31885 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Mar 2019 18:08:54 +0100
Subject: [PATCH 241/295] [apps/shared] Implement
 SumGraphController::handleLeftRightEvent

---
 apps/shared/sum_graph_controller.cpp | 41 ++++++++++------------------
 apps/shared/sum_graph_controller.h   |  1 +
 2 files changed, 16 insertions(+), 26 deletions(-)

diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index be632a886..f0335832e 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -51,31 +51,7 @@ void SumGraphController::didEnterResponderChain(Responder * previousFirstRespond
 }
 
 bool SumGraphController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::Plus || event == Ion::Events::Minus) {
-    return handleZoom(event);
-  }
-  if ((int)m_step > 1 && event != Ion::Events::OK && event != Ion::Events::EXE && event != Ion::Events::Back) {
-    return false;
-  }
-  if (event == Ion::Events::Left && !m_legendView.textField()->isEditing()) {
-    if ((int)m_step > 0 && m_startSum >= m_cursor->x()) {
-      return false;
-    }
-    if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), -1))) {
-      return true;
-    }
-    return false;
-  }
-  if (event == Ion::Events::Right && !m_legendView.textField()->isEditing()) {
-    if (moveCursorHorizontallyToPosition(cursorNextStep(m_cursor->x(), 1))) {
-      return true;
-    }
-    return false;
-  }
-  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
-    return handleEnter();
-  }
-  if (event == Ion::Events::Back && (int)m_step > 0) {
+  if (event == Ion::Events::Back && m_step != Step::FirstParameter) {
     m_step = (Step)((int)m_step-1);
     m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
     if (m_step == Step::SecondParameter) {
@@ -94,7 +70,7 @@ bool SumGraphController::handleEvent(Ion::Events::Event event) {
     }
     return true;
   }
-  return false;
+  return SimpleInteractiveCurveViewController::handleEvent(event);
 }
 
 bool SumGraphController::moveCursorHorizontallyToPosition(double x) {
@@ -148,6 +124,19 @@ bool SumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Ev
   return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
 }
 
+bool SumGraphController::handleLeftRightEvent(Ion::Events::Event event) {
+  if (m_step == Step::Result) {
+    return false;
+  }
+  const double oldPosition = m_cursor->x();
+  int direction = event == Ion::Events::Left ? -1 : 1;
+  double newPosition = cursorNextStep(oldPosition, direction);
+  if (m_step == Step::SecondParameter && newPosition < m_startSum) {
+    newPosition = m_startSum;
+  }
+  return moveCursorHorizontallyToPosition(newPosition);
+}
+
 bool SumGraphController::handleEnter() {
   if (m_step == Step::Result) {
     StackViewController * stack = (StackViewController *)parentResponder();
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index dd9fa5052..7c8e830b4 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -36,6 +36,7 @@ protected:
 private:
   constexpr static float k_cursorTopMarginRatio = 0.06f;   // (cursorHeight/2)/graphViewHeight
   constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
+  bool handleLeftRightEvent(Ion::Events::Event event) override;
   virtual I18n::Message legendMessageAtStep(Step step) = 0;
   virtual double cursorNextStep(double position, int direction) = 0;
   virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;

From a400a5024b5aa89371eb111259b41e09ab7e187e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Mar 2019 18:18:41 +0100
Subject: [PATCH 242/295] [apps/shared] Implement
 SumGraphController::reloadBannerView

---
 ...simple_interactive_curve_view_controller.h |  2 +-
 apps/shared/sum_graph_controller.cpp          | 60 ++++++++++---------
 apps/shared/sum_graph_controller.h            | 11 ++--
 3 files changed, 38 insertions(+), 35 deletions(-)

diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index 1fc2b5008..c7f6a9062 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -22,7 +22,7 @@ public:
 protected:
   virtual bool handleZoom(Ion::Events::Event event);
   virtual bool handleLeftRightEvent(Ion::Events::Event event);
-  virtual void reloadBannerView() {};
+  virtual void reloadBannerView() = 0;
   /* the result of moveCursorVertically/Horizontally means:
    * false -> the cursor cannot move in this direction
    * true -> the cursor moved */
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index f0335832e..4fac3e5fd 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -40,9 +40,7 @@ void SumGraphController::viewWillAppear() {
   m_startSum = m_cursor->x();
   m_endSum = NAN;
   m_step = Step::FirstParameter;
-  m_legendView.setLegendMessage(legendMessageAtStep(Step::FirstParameter), Step::FirstParameter);
-  m_legendView.setEditableZone(m_startSum);
-  m_legendView.setSumSymbol(m_step);
+  reloadBannerView();
 }
 
 
@@ -53,21 +51,16 @@ void SumGraphController::didEnterResponderChain(Responder * previousFirstRespond
 bool SumGraphController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Back && m_step != Step::FirstParameter) {
     m_step = (Step)((int)m_step-1);
-    m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
     if (m_step == Step::SecondParameter) {
       app()->setFirstResponder(m_legendView.textField());
       m_graphView->setAreaHighlightColor(false);
       m_graphView->setCursorView(&m_cursorView);
-      m_legendView.setEditableZone(m_endSum);
-      m_legendView.setSumSymbol(m_step, m_startSum);
     }
     if (m_step == Step::FirstParameter) {
       m_graphView->setAreaHighlight(NAN,NAN);
       moveCursorHorizontallyToPosition(m_startSum);
-      m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
-      m_legendView.setEditableZone(m_startSum);
-      m_legendView.setSumSymbol(m_step);
     }
+    reloadBannerView();
     return true;
   }
   return SimpleInteractiveCurveViewController::handleEvent(event);
@@ -141,30 +134,39 @@ bool SumGraphController::handleEnter() {
   if (m_step == Step::Result) {
     StackViewController * stack = (StackViewController *)parentResponder();
     stack->pop();
-    return true;
+  } else {
+    if (m_step == Step::FirstParameter) {
+      m_graphView->setAreaHighlight(m_startSum, m_startSum);
+      m_endSum = m_startSum;
+    } else {
+      m_graphView->setAreaHighlightColor(true);
+      m_graphView->setCursorView(nullptr);
+      app()->setFirstResponder(this);
+    }
+    m_step = (Step)((int)m_step+1);
+    reloadBannerView();
   }
-  if (m_step == Step::FirstParameter) {
-    m_step = Step::SecondParameter;
-    m_graphView->setAreaHighlight(m_startSum,m_startSum);
-    m_endSum = m_cursor->x();
-    m_legendView.setEditableZone(m_endSum);
-    m_legendView.setSumSymbol(m_step, m_startSum);
-    m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
-    return true;
-  }
-  m_step = (Step)((int)m_step+1);
-  FunctionApp * myApp = static_cast<FunctionApp *>(app());
-  assert(!m_record.isNull());
-  ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
-  double sum = function->sumBetweenBounds(m_startSum, m_endSum, myApp->localContext());
-  m_legendView.setSumSymbol(m_step, m_startSum, m_endSum, sum, createFunctionLayout(function));
-  m_legendView.setLegendMessage(I18n::Message::Default, m_step);
-  m_graphView->setAreaHighlightColor(true);
-  m_graphView->setCursorView(nullptr);
-  myApp->setFirstResponder(this);
   return true;
 }
 
+void SumGraphController::reloadBannerView() {
+  m_legendView.setLegendMessage(legendMessageAtStep(m_step), m_step);
+  double result;
+  Poincare::Layout functionLayout;
+  if (m_step == Step::Result) {
+    FunctionApp * myApp = static_cast<FunctionApp *>(app());
+    assert(!m_record.isNull());
+    ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
+    result = function->sumBetweenBounds(m_startSum, m_endSum, myApp->localContext());
+    functionLayout = createFunctionLayout(function);
+  } else {
+    m_legendView.setEditableZone(m_cursor->x());
+    result = NAN;
+    functionLayout = Poincare::Layout();
+  }
+  m_legendView.setSumSymbol(m_step, m_startSum, m_endSum, result, functionLayout);
+}
+
 /* Legend View */
 
 SumGraphController::LegendView::LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol) :
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 7c8e830b4..3a9e24573 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -37,15 +37,16 @@ private:
   constexpr static float k_cursorTopMarginRatio = 0.06f;   // (cursorHeight/2)/graphViewHeight
   constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
   bool handleLeftRightEvent(Ion::Events::Event event) override;
-  virtual I18n::Message legendMessageAtStep(Step step) = 0;
-  virtual double cursorNextStep(double position, int direction) = 0;
-  virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;
+  bool handleEnter() override;
+  void reloadBannerView() override;
   Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
   Shared::CurveView * curveView() override { return m_graphView; }
   TextFieldDelegateApp * textFieldDelegateApp() override {
     return static_cast<TextFieldDelegateApp *>(app());
   }
-  bool handleEnter() override;
+  virtual I18n::Message legendMessageAtStep(Step step) = 0;
+  virtual double cursorNextStep(double position, int direction) = 0;
+  virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;
   class LegendView : public View {
   public:
     LegendView(SumGraphController * controller, InputEventHandlerDelegate * inputEventHandlerDelegate, CodePoint sumSymbol);
@@ -58,7 +59,7 @@ private:
     void drawRect(KDContext * ctx, KDRect rect) const override;
     void setLegendMessage(I18n::Message message, Step step);
     void setEditableZone(double d);
-    void setSumSymbol(Step step, double start = NAN, double end = NAN, double result = NAN, Poincare::Layout sequenceName = Poincare::Layout());
+    void setSumSymbol(Step step, double start, double end, double result, Poincare::Layout functionLayout);
   private:
     constexpr static KDCoordinate k_legendHeight = 35;
     constexpr static const KDFont * k_font = KDFont::SmallFont;

From 5e5e07e963769846fbf9dfa2ed8c29cf76b6142e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 24 Apr 2019 16:47:46 +0200
Subject: [PATCH 243/295] [apps/shared] Factorize
 Store/ValuesController::textFieldDidFinishEditing

---
 .../editable_cell_table_view_controller.cpp   | 13 ++++------
 apps/shared/store_controller.cpp              | 24 +++++--------------
 apps/shared/values_controller.cpp             | 18 ++++++++++++++
 apps/shared/values_controller.h               |  1 +
 4 files changed, 30 insertions(+), 26 deletions(-)

diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index ba635fc6e..f6ceaa6c0 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -31,18 +31,15 @@ bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * text
     app()->displayWarning(I18n::Message::UndefinedValue);
     return false;
   }
-  int nbOfRows = numberOfRows();
-  int nbOfColumns = numberOfColumns();
   if (!setDataAtLocation(floatBody, selectedColumn(), selectedRow())) {
     app()->displayWarning(I18n::Message::ForbiddenValue);
     return false;
   }
-  for (int j = 0; j < numberOfColumns(); j++) {
-    selectableTableView()->reloadCellAtLocation(j, selectedRow());
-  }
-  if (nbOfRows != numberOfRows() || nbOfColumns != numberOfColumns()) {
-    selectableTableView()->reloadData();
-  }
+  /* At this point, a new cell is selected depending on the event, before the
+   * data is reloaded, which means that the right cell is selected but the data
+   * may be incorrect. The data is reloaded afterwards by the
+   * textFieldDidFinishEditing methods of the derived classes StoreController
+   * and ValuesController. */
   if (event == Ion::Events::EXE || event == Ion::Events::OK) {
     selectableTableView()->selectCellAtLocation(selectedColumn(), selectedRow()+1);
   } else {
diff --git a/apps/shared/store_controller.cpp b/apps/shared/store_controller.cpp
index 8352c627b..5fe16e690 100644
--- a/apps/shared/store_controller.cpp
+++ b/apps/shared/store_controller.cpp
@@ -95,25 +95,13 @@ bool StoreController::textFieldDidFinishEditing(TextField * textField, const cha
     }
     return true;
   }
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
-    return false;
+  bool didFinishEditing = EditableCellTableViewController::textFieldDidFinishEditing(textField, text, event);
+  if (didFinishEditing) {
+    // FIXME Find out if redrawing errors can be suppressed without always reloading all the data
+    // See Shared::ValuesController::textFieldDidFinishEditing
+    selectableTableView()->reloadData();
   }
-  if (!setDataAtLocation(floatBody, selectedColumn(), selectedRow())) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
-  // FIXME Find out if redrawing errors can be suppressed without always reloading all the data
-  selectableTableView()->reloadData();
-  if (event == Ion::Events::EXE || event == Ion::Events::OK) {
-    selectableTableView()->selectCellAtLocation(selectedColumn(), selectedRow()+1);
-  } else {
-    selectableTableView()->handleEvent(event);
-  }
-  return true;
+  return didFinishEditing;
 }
 
 bool StoreController::textFieldDidAbortEditing(TextField * textField) {
diff --git a/apps/shared/values_controller.cpp b/apps/shared/values_controller.cpp
index 994e6752a..542830b29 100644
--- a/apps/shared/values_controller.cpp
+++ b/apps/shared/values_controller.cpp
@@ -41,6 +41,24 @@ ValuesController::ValuesController(Responder * parentResponder, InputEventHandle
   }
 }
 
+bool ValuesController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+  int row = selectedRow();
+  int nbOfRows = numberOfRows();
+  bool didFinishEditing = EditableCellTableViewController::textFieldDidFinishEditing(textField, text, event);
+  if (didFinishEditing) {
+    if (nbOfRows != numberOfRows()) {
+      // Reload the whole table, if a value is appended.
+      selectableTableView()->reloadData();
+    } else {
+      // Reload the row, if an existing value is edited.
+      for (int i = 0; i < numberOfColumns(); i++) {
+        selectableTableView()->reloadCellAtLocation(i, row);
+      }
+    }
+  }
+  return didFinishEditing;
+}
+
 const char * ValuesController::title() {
   return I18n::translate(I18n::Message::ValuesTab);
 }
diff --git a/apps/shared/values_controller.h b/apps/shared/values_controller.h
index 0cab01c20..9d35418e0 100644
--- a/apps/shared/values_controller.h
+++ b/apps/shared/values_controller.h
@@ -16,6 +16,7 @@ namespace Shared {
 class ValuesController : public EditableCellTableViewController, public ButtonRowDelegate,  public AlternateEmptyViewDefaultDelegate {
 public:
   ValuesController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, I18n::Message parameterTitle, IntervalParameterController * intervalParameterController, Interval * interval);
+  bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
   const char * title() override;
   Interval * interval();
   int numberOfColumns() override;

From 82685cb371db2af0cbf3ce53a1e450dbdc689722 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 8 Mar 2019 11:40:45 +0100
Subject: [PATCH 244/295] [apps] Factorize portions checking whether text
 approximates to double

---
 apps/probability/calculation_controller.cpp         | 7 ++-----
 apps/sequence/list/list_parameter_controller.cpp    | 9 +++------
 apps/settings/sub_menu/display_mode_controller.cpp  | 7 +++----
 apps/shared/editable_cell_table_view_controller.cpp | 7 ++-----
 apps/shared/float_parameter_controller.cpp          | 7 ++-----
 apps/shared/sum_graph_controller.cpp                | 7 ++-----
 apps/shared/text_field_delegate_app.cpp             | 9 +++++++++
 apps/shared/text_field_delegate_app.h               | 1 +
 8 files changed, 24 insertions(+), 30 deletions(-)

diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 3ce66b908..e422a3884 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -212,11 +212,8 @@ bool CalculationController::textFieldShouldFinishEditing(TextField * textField,
 }
 
 bool CalculationController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  App * probaApp = (App *)app();
-  Context * globalContext = probaApp->container()->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (m_calculation->type() != Calculation::Type::FiniteIntegral && selectedColumn() == 2) {
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index ac36094be..5674f4837 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -72,14 +72,11 @@ bool ListParameterController::textFieldDidFinishEditing(TextField * textField, c
   static float maxFirstIndex = std::pow(10.0f, Sequence::k_initialRankNumberOfDigits) - 1.0f;
   /* -1 to take into account a double recursive sequence, which has
    * SecondIndex = FirstIndex + 1 */
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  float floatBody = PoincareHelpers::ApproximateToScalar<float>(text, *globalContext);
-  int index = std::round(floatBody);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
+  int index = std::round(floatBody);
   if (index < 0  || floatBody >= maxFirstIndex) {
     app()->displayWarning(I18n::Message::ForbiddenValue);
     return false;
diff --git a/apps/settings/sub_menu/display_mode_controller.cpp b/apps/settings/sub_menu/display_mode_controller.cpp
index 86af72bde..945b0876a 100644
--- a/apps/settings/sub_menu/display_mode_controller.cpp
+++ b/apps/settings/sub_menu/display_mode_controller.cpp
@@ -76,10 +76,9 @@ bool DisplayModeController::textFieldShouldFinishEditing(TextField * textField,
 }
 
 bool DisplayModeController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  Context * globalContext = textFieldDelegateApp()->localContext();
-  float floatBody = PoincareHelpers::ApproximateToScalar<float>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    floatBody = PrintFloat::k_numberOfPrintedSignificantDigits;
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
+    return false;
   }
   if (floatBody < 1) {
    floatBody = 1;
diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index f6ceaa6c0..03049a14c 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -24,11 +24,8 @@ bool EditableCellTableViewController::textFieldShouldFinishEditing(TextField * t
 }
 
 bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (!setDataAtLocation(floatBody, selectedColumn(), selectedRow())) {
diff --git a/apps/shared/float_parameter_controller.cpp b/apps/shared/float_parameter_controller.cpp
index 5c8392ace..3f210dce1 100644
--- a/apps/shared/float_parameter_controller.cpp
+++ b/apps/shared/float_parameter_controller.cpp
@@ -122,11 +122,8 @@ bool FloatParameterController::textFieldShouldFinishEditing(TextField * textFiel
 }
 
 bool FloatParameterController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (!setParameterAtIndex(selectedRow(), floatBody)) {
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 4fac3e5fd..3181f0f08 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -91,11 +91,8 @@ void SumGraphController::setRecord(Ion::Storage::Record record) {
 }
 
 bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if ((m_step == Step::SecondParameter && floatBody < m_startSum) || !moveCursorHorizontallyToPosition(floatBody)) {
diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index 720b6c0b1..b87a98b1b 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -41,6 +41,15 @@ bool TextFieldDelegateApp::isAcceptableText(const char * text) {
   return isAcceptableExpression(exp);
 }
 
+bool TextFieldDelegateApp::hasUndefinedValue(const char * text, double & value) {
+  value = PoincareHelpers::ApproximateToScalar<double>(text, *localContext());
+  bool isUndefined = std::isnan(value) || std::isinf(value);
+  if (isUndefined) {
+    displayWarning(I18n::Message::UndefinedValue);
+  }
+  return isUndefined;
+}
+
 /* Protected */
 
 TextFieldDelegateApp::TextFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
diff --git a/apps/shared/text_field_delegate_app.h b/apps/shared/text_field_delegate_app.h
index 20e6eb0e8..74885ad69 100644
--- a/apps/shared/text_field_delegate_app.h
+++ b/apps/shared/text_field_delegate_app.h
@@ -18,6 +18,7 @@ public:
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
   virtual bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
   bool isAcceptableText(const char * text);
+  bool hasUndefinedValue(const char * text, double & value);
 protected:
   TextFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController);
   bool fieldDidReceiveEvent(EditableField * field, Responder * responder, Ion::Events::Event event);

From 696434d38a6a5f1ca7570248dbde12681b840272 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 15 Mar 2019 10:56:54 +0100
Subject: [PATCH 245/295] [apps] GoToParameterController: remove ForbiddenValue
 warnings

when the controller tries to move the cursor beyond the limit of 1E8.
---
 apps/regression/go_to_parameter_controller.cpp     | 14 ++------------
 .../shared/function_go_to_parameter_controller.cpp |  8 --------
 apps/shared/go_to_parameter_controller.h           |  1 -
 3 files changed, 2 insertions(+), 21 deletions(-)

diff --git a/apps/regression/go_to_parameter_controller.cpp b/apps/regression/go_to_parameter_controller.cpp
index b0633e3b5..a2a71a7bc 100644
--- a/apps/regression/go_to_parameter_controller.cpp
+++ b/apps/regression/go_to_parameter_controller.cpp
@@ -40,22 +40,12 @@ double GoToParameterController::parameterAtIndex(int index) {
 bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
   assert(parameterIndex == 0);
   int series = m_graphController->selectedSeriesIndex();
-  if (std::fabs(f) > k_maxDisplayableFloat) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
   Poincare::Context * globContext = const_cast<AppsContainer *>(static_cast<const AppsContainer *>(app()->container()))->globalContext();
   double unknown = m_xPrediction ?
     m_store->yValueForXValue(series, f, globContext) :
     m_store->xValueForYValue(series, f, globContext);
 
-  // Forbidden value
-  if (std::fabs(unknown) > k_maxDisplayableFloat) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
-
-  if (std::isnan(unknown)) {
+  if (std::isnan(unknown) || std::isinf(unknown)) {
     if (!m_xPrediction) {
       double x = m_cursor->x();
       unknown = m_store->modelForSeries(series)->evaluate(m_store->coefficientsForSeries(series, globContext), x);
@@ -77,7 +67,7 @@ bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f)
     double yFromX = m_store->modelForSeries(series)->evaluate(m_store->coefficientsForSeries(series, globContext), unknown);
     /* We here compute y2 = a*((y1-b)/a)+b, which does not always give y1,
      * because of computation precision. y2 migth thus be invalid. */
-    if (std::fabs(yFromX) > k_maxDisplayableFloat || std::isnan(yFromX)) {
+    if (std::isnan(yFromX) || std::isinf(yFromX)) {
       app()->displayWarning(I18n::Message::ForbiddenValue);
       return false;
     }
diff --git a/apps/shared/function_go_to_parameter_controller.cpp b/apps/shared/function_go_to_parameter_controller.cpp
index a4e8ede5d..73fbbee44 100644
--- a/apps/shared/function_go_to_parameter_controller.cpp
+++ b/apps/shared/function_go_to_parameter_controller.cpp
@@ -25,14 +25,6 @@ bool FunctionGoToParameterController::setParameterAtIndex(int parameterIndex, do
   FunctionApp * myApp = (FunctionApp *)app();
   ExpiringPointer<Function> function = myApp->functionStore()->modelForRecord(m_record);
   float y = function->evaluateAtAbscissa(f, myApp->localContext());
-  if (std::fabs(f) > k_maxDisplayableFloat || std::fabs(y) > k_maxDisplayableFloat) {
-    app()->displayWarning(I18n::Message::ForbiddenValue);
-    return false;
-  }
-  if (std::isnan(y) || std::isinf(y)) {
-    app()->displayWarning(I18n::Message::ValueNotReachedByFunction);
-    return false;
-  }
   m_cursor->moveTo(f, y);
   m_graphRange->centerAxisAround(CurveViewRange::Axis::X, m_cursor->x());
   m_graphRange->centerAxisAround(CurveViewRange::Axis::Y, m_cursor->y());
diff --git a/apps/shared/go_to_parameter_controller.h b/apps/shared/go_to_parameter_controller.h
index 34c556361..1abc21afc 100644
--- a/apps/shared/go_to_parameter_controller.h
+++ b/apps/shared/go_to_parameter_controller.h
@@ -14,7 +14,6 @@ public:
   int numberOfRows() override;
   bool handleEvent(Ion::Events::Event event) override;
 protected:
-  constexpr static double k_maxDisplayableFloat = 1E8;
   CurveViewCursor * m_cursor;
   InteractiveCurveViewRange * m_graphRange;
 private:

From 82a0f72d42b5745f23de9b2672f2e6f6b147d66f Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 12 Apr 2019 15:10:41 +0200
Subject: [PATCH 246/295] [apps/shared] Clean FunctionCurveParameterController
 constructor

---
 apps/graph/graph/curve_parameter_controller.cpp     | 2 +-
 apps/sequence/graph/curve_parameter_controller.cpp  | 2 +-
 apps/sequence/graph/curve_parameter_controller.h    | 1 -
 apps/shared/function_curve_parameter_controller.cpp | 2 +-
 apps/shared/function_curve_parameter_controller.h   | 4 +---
 5 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/apps/graph/graph/curve_parameter_controller.cpp b/apps/graph/graph/curve_parameter_controller.cpp
index 154070b51..ad595ec57 100644
--- a/apps/graph/graph/curve_parameter_controller.cpp
+++ b/apps/graph/graph/curve_parameter_controller.cpp
@@ -8,7 +8,7 @@ using namespace Shared;
 namespace Graph {
 
 CurveParameterController::CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, InteractiveCurveViewRange * graphRange, BannerView * bannerView, CurveViewCursor * cursor, GraphView * graphView, GraphController * graphController) :
-  FunctionCurveParameterController(graphRange, cursor),
+  FunctionCurveParameterController(),
   m_goToParameterController(this, inputEventHandlerDelegate, graphRange, cursor, I18n::Message::X),
   m_graphController(graphController),
   m_calculationCell(I18n::Message::Compute),
diff --git a/apps/sequence/graph/curve_parameter_controller.cpp b/apps/sequence/graph/curve_parameter_controller.cpp
index 6521148ec..116be8325 100644
--- a/apps/sequence/graph/curve_parameter_controller.cpp
+++ b/apps/sequence/graph/curve_parameter_controller.cpp
@@ -7,7 +7,7 @@ using namespace Shared;
 namespace Sequence {
 
 CurveParameterController::CurveParameterController(InputEventHandlerDelegate * inputEventHandlerDelegate, GraphController * graphController, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
-  FunctionCurveParameterController(graphRange, cursor),
+  FunctionCurveParameterController(),
   m_goToParameterController(this, inputEventHandlerDelegate, graphRange, cursor, I18n::Message::N),
   m_sumCell(I18n::Message::TermSum),
   m_graphController(graphController)
diff --git a/apps/sequence/graph/curve_parameter_controller.h b/apps/sequence/graph/curve_parameter_controller.h
index 37e0eb54f..b2919ec9b 100644
--- a/apps/sequence/graph/curve_parameter_controller.h
+++ b/apps/sequence/graph/curve_parameter_controller.h
@@ -1,7 +1,6 @@
 #ifndef SEQUENCE_CURVE_PARAMETER_CONTROLLER_H
 #define SEQUENCE_CURVE_PARAMETER_CONTROLLER_H
 
-#include <escher.h>
 #include "../../shared/function_curve_parameter_controller.h"
 #include "go_to_parameter_controller.h"
 
diff --git a/apps/shared/function_curve_parameter_controller.cpp b/apps/shared/function_curve_parameter_controller.cpp
index 797dbe669..b401eb5de 100644
--- a/apps/shared/function_curve_parameter_controller.cpp
+++ b/apps/shared/function_curve_parameter_controller.cpp
@@ -3,7 +3,7 @@
 
 namespace Shared {
 
-FunctionCurveParameterController::FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor) :
+FunctionCurveParameterController::FunctionCurveParameterController() :
   ViewController(nullptr),
   m_goToCell(I18n::Message::Goto),
   m_selectableTableView(this, this, this),
diff --git a/apps/shared/function_curve_parameter_controller.h b/apps/shared/function_curve_parameter_controller.h
index 2030cbd5b..fc99aea8b 100644
--- a/apps/shared/function_curve_parameter_controller.h
+++ b/apps/shared/function_curve_parameter_controller.h
@@ -3,14 +3,12 @@
 
 #include <escher.h>
 #include "function_go_to_parameter_controller.h"
-#include "curve_view_cursor.h"
-#include "interactive_curve_view_range.h"
 
 namespace Shared {
 
 class FunctionCurveParameterController : public ViewController, public SimpleListViewDataSource, public SelectableTableViewDataSource {
 public:
-  FunctionCurveParameterController(InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor);
+  FunctionCurveParameterController();
   View * view() override;
   void didBecomeFirstResponder() override;
   KDCoordinate cellHeight() override;

From ce712eac536bcc7a7b01e9e7ce79de925e8e3b91 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 12 Mar 2019 12:12:51 +0100
Subject: [PATCH 247/295] [apps/shared] Clean
 SimpleInteractiveCurveViewController constructor

---
 apps/graph/graph/tangent_graph_controller.cpp            | 2 +-
 apps/shared/interactive_curve_view_controller.cpp        | 2 +-
 apps/shared/simple_interactive_curve_view_controller.cpp | 2 +-
 apps/shared/simple_interactive_curve_view_controller.h   | 2 +-
 apps/shared/sum_graph_controller.cpp                     | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index 79a79dd9b..e2bdfd301 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -8,7 +8,7 @@ using namespace Poincare;
 namespace Graph {
 
 TangentGraphController::TangentGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor) :
-  SimpleInteractiveCurveViewController(parentResponder, curveViewRange, graphView, cursor),
+  SimpleInteractiveCurveViewController(parentResponder, cursor),
   m_graphView(graphView),
   m_bannerView(bannerView),
   m_graphRange(curveViewRange),
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index d9250f266..b8a3c61ea 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -9,7 +9,7 @@ using namespace Poincare;
 namespace Shared {
 
 InteractiveCurveViewController::InteractiveCurveViewController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, uint32_t * modelVersion, uint32_t * rangeVersion) :
-  SimpleInteractiveCurveViewController(parentResponder, interactiveRange, curveView, cursor),
+  SimpleInteractiveCurveViewController(parentResponder, cursor),
   ButtonRowDelegate(header, nullptr),
   m_modelVersion(modelVersion),
   m_rangeVersion(rangeVersion),
diff --git a/apps/shared/simple_interactive_curve_view_controller.cpp b/apps/shared/simple_interactive_curve_view_controller.cpp
index ac572b425..d2d43d41e 100644
--- a/apps/shared/simple_interactive_curve_view_controller.cpp
+++ b/apps/shared/simple_interactive_curve_view_controller.cpp
@@ -6,7 +6,7 @@ using namespace Poincare;
 
 namespace Shared {
 
-SimpleInteractiveCurveViewController::SimpleInteractiveCurveViewController(Responder * parentResponder,InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor) :
+SimpleInteractiveCurveViewController::SimpleInteractiveCurveViewController(Responder * parentResponder, CurveViewCursor * cursor) :
   ViewController(parentResponder),
   m_cursor(cursor)
 {
diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index c7f6a9062..77c0fa69e 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -13,7 +13,7 @@ namespace Shared {
 
 class SimpleInteractiveCurveViewController : public ViewController {
 public:
-  SimpleInteractiveCurveViewController(Responder * parentResponder, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor);
+  SimpleInteractiveCurveViewController(Responder * parentResponder, CurveViewCursor * cursor);
   View * view() override;
   bool handleEvent(Ion::Events::Event event) override;
   constexpr static float k_cursorRightMarginRatio = 0.04f; // (cursorWidth/2)/graphViewWidth
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 3181f0f08..9e5cda01d 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -15,7 +15,7 @@ using namespace Poincare;
 namespace Shared {
 
 SumGraphController::SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * graphView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol) :
-  SimpleInteractiveCurveViewController(parentResponder, range, graphView, cursor),
+  SimpleInteractiveCurveViewController(parentResponder, cursor),
   m_step(Step::FirstParameter),
   m_startSum(NAN),
   m_endSum(NAN),

From fe977bdc0780faa0509e47d24fed86e7303ea195 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 12 Mar 2019 15:00:16 +0100
Subject: [PATCH 248/295] [apps/graph/graph] CalculationGraphController
 inherits from SimpleInteractiveCurveViewController

---
 .../graph/calculation_graph_controller.cpp    | 59 ++++++++-----------
 .../graph/calculation_graph_controller.h      | 18 +++---
 ...simple_interactive_curve_view_controller.h |  2 +-
 3 files changed, 36 insertions(+), 43 deletions(-)

diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 409e28cd4..ff2c56079 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -7,21 +7,16 @@ using namespace Poincare;
 namespace Graph {
 
 CalculationGraphController::CalculationGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, I18n::Message defaultMessage) :
-  ViewController(parentResponder),
+  SimpleInteractiveCurveViewController(parentResponder, cursor),
   m_graphView(graphView),
   m_bannerView(bannerView),
   m_graphRange(curveViewRange),
-  m_cursor(cursor),
   m_record(),
   m_defaultBannerView(KDFont::SmallFont, defaultMessage, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_isActive(false)
 {
 }
 
-View * CalculationGraphController::view() {
-  return m_graphView;
-}
-
 void CalculationGraphController::viewWillAppear() {
   assert(!m_record.isNull());
   Expression::Coordinate2D pointOfInterest = computeNewPointOfInteresetFromAbscissa(m_graphRange->xMin(), 1);
@@ -32,30 +27,13 @@ void CalculationGraphController::viewWillAppear() {
   } else {
     m_isActive = true;
     m_cursor->moveTo(pointOfInterest.abscissa, pointOfInterest.value);
-    m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, SimpleInteractiveCurveViewController::k_cursorRightMarginRatio, k_cursorBottomMarginRatio, SimpleInteractiveCurveViewController::k_cursorLeftMarginRatio);
+    m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
     reloadBannerView();
   }
   m_graphView->setOkView(nullptr);
   m_graphView->reload();
 }
 
-bool CalculationGraphController::handleEvent(Ion::Events::Event event) {
-  if (event == Ion::Events::EXE || event == Ion::Events::OK) {
-    StackViewController * stack = static_cast<StackViewController *>(parentResponder());
-    stack->pop();
-    return true;
-  }
-  if (m_isActive && (event == Ion::Events::Right || event == Ion::Events::Left)) {
-    int direction = event == Ion::Events::Right ? 1 : -1;
-    if (moveCursor(direction)) {
-      reloadBannerView();
-      m_graphView->reload();
-      return true;
-    }
-  }
-  return false;
-}
-
 void CalculationGraphController::setRecord(Ion::Storage::Record record) {
   m_graphView->selectRecord(record);
   m_record = record;
@@ -66,16 +44,6 @@ void CalculationGraphController::reloadBannerView() {
   reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), CartesianFunction::Symbol());
 }
 
-bool CalculationGraphController::moveCursor(int direction) {
-  Expression::Coordinate2D newPointOfInterest = computeNewPointOfInteresetFromAbscissa(m_cursor->x(), direction);
-  if (std::isnan(newPointOfInterest.abscissa)) {
-    return false;
-  }
-  m_cursor->moveTo(newPointOfInterest.abscissa, newPointOfInterest.value);
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, SimpleInteractiveCurveViewController::k_cursorRightMarginRatio, k_cursorBottomMarginRatio, SimpleInteractiveCurveViewController::k_cursorLeftMarginRatio);
-  return true;
-}
-
 Expression::Coordinate2D CalculationGraphController::computeNewPointOfInteresetFromAbscissa(double start, int direction) {
   App * myApp = static_cast<App *>(app());
   double step = m_graphRange->xGridUnit()/10.0;
@@ -89,4 +57,27 @@ CartesianFunctionStore * CalculationGraphController::functionStore() const {
   return a->functionStore();
 }
 
+bool CalculationGraphController::handleLeftRightEvent(Ion::Events::Event event) {
+  if (!m_isActive) {
+    return false;
+  }
+  return SimpleInteractiveCurveViewController::handleLeftRightEvent(event);
+}
+
+bool CalculationGraphController::handleEnter() {
+  StackViewController * stack = static_cast<StackViewController *>(parentResponder());
+  stack->pop();
+  return true;
+}
+
+bool CalculationGraphController::moveCursorHorizontally(int direction) {
+  Expression::Coordinate2D newPointOfInterest = computeNewPointOfInteresetFromAbscissa(m_cursor->x(), direction);
+  if (std::isnan(newPointOfInterest.abscissa)) {
+    return false;
+  }
+  m_cursor->moveTo(newPointOfInterest.abscissa, newPointOfInterest.value);
+  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  return true;
+}
+
 }
diff --git a/apps/graph/graph/calculation_graph_controller.h b/apps/graph/graph/calculation_graph_controller.h
index 6404a373a..8dff41540 100644
--- a/apps/graph/graph/calculation_graph_controller.h
+++ b/apps/graph/graph/calculation_graph_controller.h
@@ -3,8 +3,7 @@
 
 #include "graph_view.h"
 #include "banner_view.h"
-#include "../../shared/curve_view_cursor.h"
-#include "../../shared/interactive_curve_view_range.h"
+#include "../../shared/simple_interactive_curve_view_controller.h"
 #include "../../shared/function_banner_delegate.h"
 #include "../cartesian_function_store.h"
 
@@ -12,29 +11,32 @@ namespace Graph {
 
 class App;
 
-class CalculationGraphController : public ViewController, public Shared::FunctionBannerDelegate {
+class CalculationGraphController : public Shared::SimpleInteractiveCurveViewController, public Shared::FunctionBannerDelegate {
 public:
   CalculationGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor, I18n::Message defaultMessage);
-  View * view() override;
   void viewWillAppear() override;
-  bool handleEvent(Ion::Events::Event event) override;
   void setRecord(Ion::Storage::Record record);
 protected:
   constexpr static float k_cursorTopMarginRatio = 0.07f;   // (cursorHeight/2)/graphViewHeight
   constexpr static float k_cursorBottomMarginRatio = 0.15f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
   BannerView * bannerView() override { return m_bannerView; }
-  virtual void reloadBannerView();
-  bool moveCursor(int direction);
+  void reloadBannerView() override;
   Poincare::Expression::Coordinate2D computeNewPointOfInteresetFromAbscissa(double start, int direction);
   CartesianFunctionStore * functionStore() const;
   virtual Poincare::Expression::Coordinate2D computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) = 0;
   GraphView * m_graphView;
   BannerView * m_bannerView;
   Shared::InteractiveCurveViewRange * m_graphRange;
-  Shared::CurveViewCursor * m_cursor;
   Ion::Storage::Record m_record;
   MessageTextView m_defaultBannerView;
   bool m_isActive;
+private:
+  bool handleZoom(Ion::Events::Event event) override { return false; }
+  bool handleLeftRightEvent(Ion::Events::Event event) override;
+  bool handleEnter() override;
+  bool moveCursorHorizontally(int direction) override;
+  Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
+  Shared::CurveView * curveView() override { return m_graphView; }
 };
 
 }
diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index 77c0fa69e..6c1139a39 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -16,10 +16,10 @@ public:
   SimpleInteractiveCurveViewController(Responder * parentResponder, CurveViewCursor * cursor);
   View * view() override;
   bool handleEvent(Ion::Events::Event event) override;
+protected:
   constexpr static float k_cursorRightMarginRatio = 0.04f; // (cursorWidth/2)/graphViewWidth
   constexpr static float k_cursorLeftMarginRatio = 0.04f;  // (cursorWidth/2)/graphViewWidth
   constexpr static float k_numberOfCursorStepsInGradUnit = 5.0f;
-protected:
   virtual bool handleZoom(Ion::Events::Event event);
   virtual bool handleLeftRightEvent(Ion::Events::Event event);
   virtual void reloadBannerView() = 0;

From 5b6fca8f724037d6a483f693d0ac0bb839fc413b Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 13 Mar 2019 10:06:50 +0100
Subject: [PATCH 249/295] [apps] Replace k_cursorTop/BottomMarginRatio by
 virtual methods

In SimpleInteractiveCurveViewController subclasses.
---
 apps/graph/graph/calculation_graph_controller.cpp      | 4 ++--
 apps/graph/graph/calculation_graph_controller.h        | 3 +--
 apps/graph/graph/tangent_graph_controller.cpp          | 4 ++--
 apps/graph/graph/tangent_graph_controller.h            | 3 +--
 apps/regression/graph_controller.h                     | 3 +--
 apps/shared/function_graph_controller.h                | 4 ++--
 apps/shared/simple_interactive_curve_view_controller.h | 2 ++
 apps/shared/sum_graph_controller.cpp                   | 4 ++--
 apps/shared/sum_graph_controller.h                     | 4 ++--
 9 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index ff2c56079..192301fd9 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -27,7 +27,7 @@ void CalculationGraphController::viewWillAppear() {
   } else {
     m_isActive = true;
     m_cursor->moveTo(pointOfInterest.abscissa, pointOfInterest.value);
-    m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+    m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
     reloadBannerView();
   }
   m_graphView->setOkView(nullptr);
@@ -76,7 +76,7 @@ bool CalculationGraphController::moveCursorHorizontally(int direction) {
     return false;
   }
   m_cursor->moveTo(newPointOfInterest.abscissa, newPointOfInterest.value);
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/graph/graph/calculation_graph_controller.h b/apps/graph/graph/calculation_graph_controller.h
index 8dff41540..976a63f6c 100644
--- a/apps/graph/graph/calculation_graph_controller.h
+++ b/apps/graph/graph/calculation_graph_controller.h
@@ -17,8 +17,7 @@ public:
   void viewWillAppear() override;
   void setRecord(Ion::Storage::Record record);
 protected:
-  constexpr static float k_cursorTopMarginRatio = 0.07f;   // (cursorHeight/2)/graphViewHeight
-  constexpr static float k_cursorBottomMarginRatio = 0.15f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
+  float cursorBottomMarginRatio() override { return 0.15f; }
   BannerView * bannerView() override { return m_bannerView; }
   void reloadBannerView() override;
   Poincare::Expression::Coordinate2D computeNewPointOfInteresetFromAbscissa(double start, int direction);
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index e2bdfd301..68acdedf9 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -21,7 +21,7 @@ const char * TangentGraphController::title() {
 }
 
 void TangentGraphController::viewWillAppear() {
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   m_graphView->drawTangent(true);
   m_graphView->setOkView(nullptr);
   m_graphView->selectMainView(true);
@@ -61,7 +61,7 @@ void TangentGraphController::reloadBannerView() {
 
 bool TangentGraphController::moveCursorHorizontally(int direction) {
   App * myApp = static_cast<App *>(app());
-  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, m_record, myApp, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, m_record, myApp, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
 }
 
 bool TangentGraphController::handleEnter() {
diff --git a/apps/graph/graph/tangent_graph_controller.h b/apps/graph/graph/tangent_graph_controller.h
index 7067d80de..2a04f4e99 100644
--- a/apps/graph/graph/tangent_graph_controller.h
+++ b/apps/graph/graph/tangent_graph_controller.h
@@ -17,8 +17,7 @@ public:
   void viewWillAppear() override;
   void setRecord(Ion::Storage::Record record);
 private:
-  constexpr static float k_cursorTopMarginRatio = 0.07f;   // (cursorHeight/2)/graphViewHeight
-  constexpr static float k_cursorBottomMarginRatio = 0.22f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
+  float cursorBottomMarginRatio() override { return 0.22f; }
   Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
   Shared::CurveView * curveView() override { return m_graphView; }
   BannerView * bannerView() override { return m_bannerView; };
diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index b30ac092e..252fd5e72 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -34,8 +34,7 @@ private:
   constexpr static float k_viewHeight = 174.0f;
 
   Poincare::Context * globalContext();
-  float cursorTopMarginRatio() { return 0.07f; } // (cursorHeight/2) / graphViewHeight
-  float cursorBottomMarginRatio();
+  float cursorBottomMarginRatio() override;
   float estimatedBannerHeight() const;
 
   // SimpleInteractiveCurveViewController
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index a88f90268..0300c47c7 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -19,8 +19,8 @@ public:
   void viewWillAppear() override;
 
 protected:
-  float cursorTopMarginRatio() { return 0.068f; } // (cursorHeight/2)/graphViewHeight
-  float cursorBottomMarginRatio();
+  float cursorTopMarginRatio() override { return 0.068f; }
+  float cursorBottomMarginRatio() override;
   void reloadBannerView() override;
   bool handleEnter() override;
   int indexFunctionSelectedByCursor() const { return *m_indexFunctionSelectedByCursor; }
diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index 6c1139a39..b25397e41 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -19,6 +19,8 @@ public:
 protected:
   constexpr static float k_cursorRightMarginRatio = 0.04f; // (cursorWidth/2)/graphViewWidth
   constexpr static float k_cursorLeftMarginRatio = 0.04f;  // (cursorWidth/2)/graphViewWidth
+  virtual float cursorTopMarginRatio() { return 0.07f; }   // (cursorHeight/2)/graphViewHeight
+  virtual float cursorBottomMarginRatio() = 0;             // (cursorHeight/2+bannerHeight)/graphViewHeight
   constexpr static float k_numberOfCursorStepsInGradUnit = 5.0f;
   virtual bool handleZoom(Ion::Events::Event event);
   virtual bool handleLeftRightEvent(Ion::Events::Event event);
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 9e5cda01d..21e6dc03d 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -28,7 +28,7 @@ SumGraphController::SumGraphController(Responder * parentResponder, InputEventHa
 }
 
 void SumGraphController::viewWillAppear() {
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   m_graphView->setBannerView(&m_legendView);
   m_graphView->setCursorView(&m_cursorView);
   m_graphView->setOkView(nullptr);
@@ -80,7 +80,7 @@ bool SumGraphController::moveCursorHorizontallyToPosition(double x) {
     m_graphView->setAreaHighlight(m_startSum, m_endSum);
   }
   m_legendView.setEditableZone(m_cursor->x());
-  m_graphRange->panToMakePointVisible(x, y, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
+  m_graphRange->panToMakePointVisible(x, y, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   m_graphView->reload();
   return true;
 }
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 3a9e24573..b33d4e0a8 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -34,8 +34,8 @@ protected:
   Ion::Storage::Record m_record;
   InteractiveCurveViewRange * m_graphRange;
 private:
-  constexpr static float k_cursorTopMarginRatio = 0.06f;   // (cursorHeight/2)/graphViewHeight
-  constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
+  float cursorTopMarginRatio() override { return 0.06f; }
+  float cursorBottomMarginRatio() override { return 0.28f; }
   bool handleLeftRightEvent(Ion::Events::Event event) override;
   bool handleEnter() override;
   void reloadBannerView() override;

From e7add02912b494c9c350a5fec977ab88b0487b49 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 10:27:57 +0200
Subject: [PATCH 250/295] [apps] Remove FunctionGraphController::cursorView()
 virtual method

It was implemented by the Graph and Sequence GraphController derived
classes and was used
  1) in FunctionGraphController::viewWillAppear to set the cursorView
specific to each derived class,
  2) in FunctionGraphController::cursor/displayBottomMarginRatio()
methods.

Instead
  1) the viewWillAppear method of each derived classes sets its
cursorView itself
  2) one may already get the cursorView through curveView().
---
 apps/graph/graph/graph_controller.cpp     | 3 ++-
 apps/graph/graph/graph_controller.h       | 3 ---
 apps/sequence/graph/graph_controller.cpp  | 5 +++++
 apps/sequence/graph/graph_controller.h    | 4 +---
 apps/shared/function_graph_controller.cpp | 5 ++---
 apps/shared/function_graph_controller.h   | 1 -
 6 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index e662fdbb8..a3153d34e 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -27,6 +27,7 @@ I18n::Message GraphController::emptyMessage() {
 
 void GraphController::viewWillAppear() {
   m_view.drawTangent(false);
+  m_view.setCursorView(&m_cursorView);
   FunctionGraphController::viewWillAppear();
   selectFunctionWithCursor(indexFunctionSelectedByCursor()); // update the color of the cursor
 }
@@ -58,7 +59,7 @@ int GraphController::estimatedBannerNumberOfLines() const {
 
 void GraphController::selectFunctionWithCursor(int functionIndex) {
   FunctionGraphController::selectFunctionWithCursor(functionIndex);
-  ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor()));
+  ExpiringPointer<CartesianFunction> f = functionStore()->modelForRecord(functionStore()->activeRecordAtIndex(functionIndex));
   m_cursorView.setColor(f->color());
 }
 
diff --git a/apps/graph/graph/graph_controller.h b/apps/graph/graph/graph_controller.h
index 7daa8b0f5..b81df43d4 100644
--- a/apps/graph/graph/graph_controller.h
+++ b/apps/graph/graph/graph_controller.h
@@ -29,9 +29,6 @@ private:
   bool moveCursorHorizontally(int direction) override;
   Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override;
   GraphView * functionGraphView() override;
-  View * cursorView() override {
-    return &m_cursorView;
-  }
   CurveParameterController * curveParameterController() override;
   CartesianFunctionStore * functionStore() const override { return static_cast<CartesianFunctionStore *>(Shared::FunctionGraphController::functionStore()); }
   Shared::RoundCursorView m_cursorView;
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index f141eba34..5b4410c86 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -28,6 +28,11 @@ I18n::Message GraphController::emptyMessage() {
   return I18n::Message::NoActivatedSequence;
 }
 
+void GraphController::viewWillAppear() {
+  m_view.setCursorView(&m_cursorView);
+  FunctionGraphController::viewWillAppear();
+}
+
 float GraphController::interestingXMin() const {
   int nmin = INT_MAX;
   int nbOfActiveModels = functionStore()->numberOfActiveFunctions();
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 8c4ef8700..c50e2da71 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -16,6 +16,7 @@ class GraphController final : public Shared::FunctionGraphController {
 public:
   GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
+  void viewWillAppear() override;
   TermSumController * termSumController() { return &m_termSumController; }
   // InteractiveCurveViewRangeDelegate
   float interestingXMin() const override;
@@ -28,9 +29,6 @@ private:
   CurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
   SequenceStore * functionStore() const override { return static_cast<SequenceStore *>(Shared::FunctionGraphController::functionStore()); }
   GraphView * functionGraphView() override { return &m_view; }
-  View * cursorView() override {
-    return &m_cursorView;
-  }
   CurveParameterController * curveParameterController() override { return &m_curveParameterController; }
   Shared::CursorView m_cursorView;
   Shared::XYBannerView m_bannerView;
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 4971f5bfc..dc2db53f8 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -28,7 +28,6 @@ ViewController * FunctionGraphController::initialisationParameterController() {
 }
 
 void FunctionGraphController::viewWillAppear() {
-  functionGraphView()->setCursorView(cursorView());
   functionGraphView()->setBannerView(bannerView());
   functionGraphView()->setAreaHighlight(NAN,NAN);
 
@@ -57,7 +56,7 @@ void FunctionGraphController::selectFunctionWithCursor(int functionIndex) {
 }
 
 float FunctionGraphController::cursorBottomMarginRatio() {
-  return (cursorView()->minimalSizeForOptimalDisplay().height()/2+estimatedBannerHeight())/k_viewHeight;
+  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height()/2+estimatedBannerHeight())/k_viewHeight;
 }
 
 void FunctionGraphController::reloadBannerView() {
@@ -69,7 +68,7 @@ void FunctionGraphController::reloadBannerView() {
 }
 
 float FunctionGraphController::displayBottomMarginRatio() {
-  return (cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
+  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
 }
 
 float FunctionGraphController::estimatedBannerHeight() const {
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index 0300c47c7..c97bd290c 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -32,7 +32,6 @@ private:
   constexpr static float k_viewHeight = 174.0f; // TODO Taken from Regresssion/graph_controller. Maybe we should compute and/or put in common ?
 
   virtual FunctionGraphView * functionGraphView() = 0;
-  virtual View * cursorView() = 0;
   virtual FunctionCurveParameterController * curveParameterController() = 0;
 
   // InteractiveCurveViewController

From 51bd3312f5aa0e3ad619db405b26a084fe537f34 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 10:41:04 +0200
Subject: [PATCH 251/295] [apps/shared] Clean
 FunctionGraphController::initRangeParameters()

The method is exactly called once, by
InteractiveCurveViewController::viewWillAppear, which also calls
initCursorParameters afterwards, which in turn calls
selectFunctionWithCursor. Hence the removed lines were redundant.
---
 apps/shared/function_graph_controller.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index dc2db53f8..7e766d366 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -110,8 +110,6 @@ InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(
 
 void FunctionGraphController::initRangeParameters() {
   interactiveCurveViewRange()->setDefault();
-  initCursorParameters();
-  selectFunctionWithCursor(0);
 }
 
 double FunctionGraphController::defaultCursorAbscissa() {

From e13651f6fb3144c7005c33d208e1969183a078e4 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 10:55:21 +0200
Subject: [PATCH 252/295] [apps] Remove
 Shared::InteractiveCurveViewController::initRangeParameters virtual method

---
 apps/regression/graph_controller.cpp              | 4 ----
 apps/regression/graph_controller.h                | 1 -
 apps/shared/function_graph_controller.cpp         | 4 ----
 apps/shared/function_graph_controller.h           | 1 -
 apps/shared/interactive_curve_view_controller.cpp | 2 +-
 apps/shared/interactive_curve_view_controller.h   | 1 -
 6 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index b4da31972..d77a194ef 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -266,10 +266,6 @@ bool GraphController::handleEnter() {
 }
 
 // InteractiveCurveViewController
-void GraphController::initRangeParameters() {
-  m_store->setDefault();
-}
-
 void GraphController::initCursorParameters() {
   if (*m_selectedSeriesIndex < 0 || m_store->seriesIsEmpty(*m_selectedSeriesIndex)) {
     *m_selectedSeriesIndex = m_store->indexOfKthNonEmptySeries(0);
diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index 252fd5e72..2f7d59e25 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -44,7 +44,6 @@ private:
   bool handleEnter() override;
 
   // InteractiveCurveViewController
-  void initRangeParameters() override;
   void initCursorParameters() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 7e766d366..8f89bc59b 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -108,10 +108,6 @@ InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(
   return range;
 }
 
-void FunctionGraphController::initRangeParameters() {
-  interactiveCurveViewRange()->setDefault();
-}
-
 double FunctionGraphController::defaultCursorAbscissa() {
   return (interactiveCurveViewRange()->xMin()+interactiveCurveViewRange()->xMax())/2.0f;
 }
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index c97bd290c..f5cf39a4b 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -46,7 +46,6 @@ private:
   virtual int estimatedBannerNumberOfLines() const { return 1; }
 
   // InteractiveCurveViewController
-  void initRangeParameters() override;
   void initCursorParameters() override;
   bool moveCursorVertically(int direction) override;
   CurveView * curveView() override;
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index b8a3c61ea..9ed7e5a81 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -143,7 +143,7 @@ void InteractiveCurveViewController::viewWillAppear() {
   uint32_t newModelVersion = modelVersion();
   if (*m_modelVersion != newModelVersion) {
     if (*m_modelVersion == 0 || numberOfCurves() == 1) {
-      initRangeParameters();
+      interactiveCurveViewRange()->setDefault();
     }
     *m_modelVersion = newModelVersion;
     didChangeRange(interactiveCurveViewRange());
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index e455a6457..6e8f67a91 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -38,7 +38,6 @@ public:
 protected:
   Responder * tabController() const;
   virtual StackViewController * stackController() const;
-  virtual void initRangeParameters() = 0;
   virtual void initCursorParameters() = 0;
   virtual bool moveCursorVertically(int direction) = 0;
   virtual uint32_t modelVersion() = 0;

From 0b2ab14cedaba0ea386b9ce5b83b7dafed9addf1 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 12:00:14 +0200
Subject: [PATCH 253/295] [apps/shared] Fix a typo in FunctionGraphController

Introduced in commit
[shared] Factorize GraphController::initCursorParameters of Graph and Sequence
---
 apps/shared/function_graph_controller.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 8f89bc59b..7e9b78cb1 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -130,7 +130,7 @@ void FunctionGraphController::initCursorParameters() {
   functionIndex = (std::isnan(y) || std::isinf(y)) ? 0 : functionIndex - 1;
   selectFunctionWithCursor(functionIndex);
   if (interactiveCurveViewRange()->yAuto()) {
-    interactiveCurveViewRange()->panToMakePointVisible(x, y, displayTopMarginRatio(), k_cursorRightMarginRatio, displayBottomMarginRatio(), k_cursorLeftMarginRatio);
+    interactiveCurveViewRange()->panToMakePointVisible(x, y, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   }
 }
 

From e32419ce633af596c7a7f60dac3a8120b9223662 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 14:14:26 +0200
Subject: [PATCH 254/295] [apps/shared/interactive_curve_view_controller]
 InteractiveCurveViewRangeDelegate methods made private

---
 apps/shared/interactive_curve_view_controller.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 6e8f67a91..0d84460b4 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -13,11 +13,6 @@ class InteractiveCurveViewController : public SimpleInteractiveCurveViewControll
 public:
   InteractiveCurveViewController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, uint32_t * modelVersion, uint32_t * rangeVersion);
 
-  // InteractiveCurveViewRangeDelegate
-  float addMargin(float x, float range, bool isMin) override;
-  virtual float displayTopMarginRatio() = 0;
-  virtual float displayBottomMarginRatio() = 0;
-
   const char * title() override;
   bool handleEvent(Ion::Events::Event event) override;
   void didBecomeFirstResponder() override;
@@ -53,6 +48,11 @@ protected:
 
   OkView m_okView;
 private:
+  // InteractiveCurveViewRangeDelegate
+  float addMargin(float x, float range, bool isMin) override;
+  virtual float displayTopMarginRatio() = 0;
+  virtual float displayBottomMarginRatio() = 0;
+
   uint32_t * m_modelVersion;
   uint32_t * m_rangeVersion;
   RangeParameterController m_rangeParameterController;

From d8f97d62a460ed619f0f8fe5f6cee69837429e00 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 16:52:23 +0200
Subject: [PATCH 255/295] [apps] Factorize
 Shared::InteractiveCurveViewController methods

cursorBottomMarginRatio(), displayBottomMarginRatio(),
estimatedBannerHeight() and k_viewHeight moved to
Shared::InteractiveCurveViewController from derived classes.

estimatedBannerNumberOfLines() moved from
Shared::FunctionGraphController to
Shared::InteractiveCurveViewController and implemented in
Regresssion::GraphController.
---
 apps/regression/graph_controller.cpp          | 22 ++++---------------
 apps/regression/graph_controller.h            |  5 +----
 apps/shared/function_graph_controller.cpp     | 12 ----------
 apps/shared/function_graph_controller.h       |  6 -----
 .../interactive_curve_view_controller.cpp     | 12 ++++++++++
 .../interactive_curve_view_controller.h       |  9 +++++++-
 6 files changed, 25 insertions(+), 41 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index d77a194ef..192201d8a 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -75,19 +75,6 @@ Poincare::Context * GraphController::globalContext() {
   return const_cast<AppsContainer *>(static_cast<const AppsContainer *>(app()->container()))->globalContext();
 }
 
-float GraphController::cursorBottomMarginRatio() {
-  float f = (m_view.cursorView()->minimalSizeForOptimalDisplay().height()/2 + 2 + estimatedBannerHeight())/k_viewHeight;
-  return f;
-}
-
-float GraphController::estimatedBannerHeight() const {
-  if (selectedSeriesIndex() < 0) {
-    return KDFont::SmallFont->glyphSize().height() * 3;
-  }
-  float result = KDFont::SmallFont->glyphSize().height() * m_store->modelForSeries(selectedSeriesIndex())->bannerLinesCount();
-  return result;
-}
-
 // SimpleInteractiveCurveViewController
 
 void GraphController::reloadBannerView() {
@@ -382,13 +369,12 @@ int GraphController::numberOfCurves() const {
   return Store::k_numberOfSeries;
 }
 
-float GraphController::displayTopMarginRatio() {
-  return 0.12f; // cursorHeight/graphViewHeight
+int GraphController::estimatedBannerNumberOfLines() const {
+  return (selectedSeriesIndex() < 0) ? 3 : m_store->modelForSeries(selectedSeriesIndex())->bannerLinesCount();
 }
 
-float GraphController::displayBottomMarginRatio() {
-  float f = (m_view.cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight())/k_viewHeight;
-  return f;
+float GraphController::displayTopMarginRatio() {
+  return 0.12f; // cursorHeight/graphViewHeight
 }
 
 InteractiveCurveViewRangeDelegate::Range GraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index 2f7d59e25..a44da8f1e 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -31,11 +31,8 @@ public:
 private:
   constexpr static int k_maxLegendLength = 16;
   constexpr static int k_maxNumberOfCharacters = 50;
-  constexpr static float k_viewHeight = 174.0f;
 
   Poincare::Context * globalContext();
-  float cursorBottomMarginRatio() override;
-  float estimatedBannerHeight() const;
 
   // SimpleInteractiveCurveViewController
   void reloadBannerView() override;
@@ -52,10 +49,10 @@ private:
   double yValue(int curveIndex, double x, Poincare::Context * context) const override;
   bool suitableYValue(double y) const override;
   int numberOfCurves() const override;
+  int estimatedBannerNumberOfLines() const override;
 
   // InteractiveCurveViewRangeDelegate
   float displayTopMarginRatio() override;
-  float displayBottomMarginRatio() override;
   Shared::InteractiveCurveViewRangeDelegate::Range computeYRange(Shared::InteractiveCurveViewRange * interactiveCurveViewRange) override;
 
   Shared::CursorView m_crossCursorView;
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 7e9b78cb1..56776141e 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -55,10 +55,6 @@ void FunctionGraphController::selectFunctionWithCursor(int functionIndex) {
   *m_indexFunctionSelectedByCursor = functionIndex;
 }
 
-float FunctionGraphController::cursorBottomMarginRatio() {
-  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height()/2+estimatedBannerHeight())/k_viewHeight;
-}
-
 void FunctionGraphController::reloadBannerView() {
   if (functionStore()->numberOfActiveFunctions() == 0) {
     return;
@@ -67,14 +63,6 @@ void FunctionGraphController::reloadBannerView() {
   reloadBannerViewForCursorOnFunction(m_cursor, record, functionStore(), functionStore()->symbol());
 }
 
-float FunctionGraphController::displayBottomMarginRatio() {
-  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
-}
-
-float FunctionGraphController::estimatedBannerHeight() const {
-  return BannerView::HeightGivenNumberOfLines(estimatedBannerNumberOfLines());
-}
-
 InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
   FunctionApp * myApp = static_cast<FunctionApp *>(app());
   float min = FLT_MAX;
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index f5cf39a4b..59d8f51b2 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -20,7 +20,6 @@ public:
 
 protected:
   float cursorTopMarginRatio() override { return 0.068f; }
-  float cursorBottomMarginRatio() override;
   void reloadBannerView() override;
   bool handleEnter() override;
   int indexFunctionSelectedByCursor() const { return *m_indexFunctionSelectedByCursor; }
@@ -29,8 +28,6 @@ protected:
   virtual FunctionStore * functionStore() const;
 
 private:
-  constexpr static float k_viewHeight = 174.0f; // TODO Taken from Regresssion/graph_controller. Maybe we should compute and/or put in common ?
-
   virtual FunctionGraphView * functionGraphView() = 0;
   virtual FunctionCurveParameterController * curveParameterController() = 0;
 
@@ -38,12 +35,9 @@ private:
   /* When y auto is ticked, we use a display margin to be ensure that the user
    * can move the cursor along the curve without panning the window */
   float displayTopMarginRatio() override { return 0.09f; } // cursorHeight/graphViewHeight
-  float displayBottomMarginRatio() override;
 
   // InteractiveCurveViewRangeDelegate
   InteractiveCurveViewRangeDelegate::Range computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) override;
-  float estimatedBannerHeight() const;
-  virtual int estimatedBannerNumberOfLines() const { return 1; }
 
   // InteractiveCurveViewController
   void initCursorParameters() override;
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 9ed7e5a81..82de5ec6c 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -247,4 +247,16 @@ int InteractiveCurveViewController::closestCurveIndexVertically(bool goingUp, in
   return nextCurveIndex;
 }
 
+float InteractiveCurveViewController::cursorBottomMarginRatio() {
+  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height()/2+estimatedBannerHeight())/k_viewHeight;
+}
+
+float InteractiveCurveViewController::estimatedBannerHeight() const {
+  return BannerView::HeightGivenNumberOfLines(estimatedBannerNumberOfLines());
+}
+
+float InteractiveCurveViewController::displayBottomMarginRatio() {
+  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
+}
+
 }
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 0d84460b4..7cabe64e6 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -46,12 +46,19 @@ protected:
   virtual bool suitableYValue(double y) const { return true; }
   virtual int numberOfCurves() const = 0;
 
+  // SimpleInteractiveCurveViewController
+  float cursorBottomMarginRatio() override;
+
   OkView m_okView;
 private:
+  constexpr static float k_viewHeight = 174.0f;
+  float estimatedBannerHeight() const;
+  virtual int estimatedBannerNumberOfLines() const { return 1; }
+
   // InteractiveCurveViewRangeDelegate
   float addMargin(float x, float range, bool isMin) override;
   virtual float displayTopMarginRatio() = 0;
-  virtual float displayBottomMarginRatio() = 0;
+  float displayBottomMarginRatio();
 
   uint32_t * m_modelVersion;
   uint32_t * m_rangeVersion;

From 86585389383585b3810ba84940fd36e29402376b Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 26 Apr 2019 17:11:08 +0200
Subject: [PATCH 256/295] [apps/shared] Clarify
 InteractiveCurveViewController::k_viewHeight constexpr

---
 apps/shared/interactive_curve_view_controller.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 7cabe64e6..2cd15624c 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -51,7 +51,10 @@ protected:
 
   OkView m_okView;
 private:
-  constexpr static float k_viewHeight = 174.0f;
+  /* The value 21 is the actual height of the ButtonRow, that is
+   * ButtonRowController::ContentView::k_plainStyleHeight + 1.
+   * That value is not public though. */
+  constexpr static float k_viewHeight = Ion::Display::Height - Metric::TitleBarHeight - Metric::TabHeight - 21;
   float estimatedBannerHeight() const;
   virtual int estimatedBannerNumberOfLines() const { return 1; }
 

From 8629254d9ac03427a81a77f1c1149c13a3ddba8e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 30 Apr 2019 14:53:02 +0200
Subject: [PATCH 257/295] [apps] Remove
 Shared::InteractiveCurveViewController::displayTop/BottomMarginRatio

and replace it by the existing cursorTop/BottomMarginRatio.
There was absolutely no reason to use different margin values.
---
 apps/regression/graph_controller.cpp                 |  4 ----
 apps/regression/graph_controller.h                   |  1 -
 apps/shared/function_graph_controller.h              |  5 -----
 apps/shared/interactive_curve_view_controller.cpp    | 12 +++++-------
 apps/shared/interactive_curve_view_controller.h      |  2 --
 .../shared/interactive_curve_view_range_delegate.cpp |  3 +++
 6 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 192201d8a..1134106c9 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -373,10 +373,6 @@ int GraphController::estimatedBannerNumberOfLines() const {
   return (selectedSeriesIndex() < 0) ? 3 : m_store->modelForSeries(selectedSeriesIndex())->bannerLinesCount();
 }
 
-float GraphController::displayTopMarginRatio() {
-  return 0.12f; // cursorHeight/graphViewHeight
-}
-
 InteractiveCurveViewRangeDelegate::Range GraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
   float minY = FLT_MAX;
   float maxY = -FLT_MAX;
diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index a44da8f1e..c3e14ee27 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -52,7 +52,6 @@ private:
   int estimatedBannerNumberOfLines() const override;
 
   // InteractiveCurveViewRangeDelegate
-  float displayTopMarginRatio() override;
   Shared::InteractiveCurveViewRangeDelegate::Range computeYRange(Shared::InteractiveCurveViewRange * interactiveCurveViewRange) override;
 
   Shared::CursorView m_crossCursorView;
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index 59d8f51b2..189ebc09d 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -31,11 +31,6 @@ private:
   virtual FunctionGraphView * functionGraphView() = 0;
   virtual FunctionCurveParameterController * curveParameterController() = 0;
 
-  // InteractiveCurveViewController
-  /* When y auto is ticked, we use a display margin to be ensure that the user
-   * can move the cursor along the curve without panning the window */
-  float displayTopMarginRatio() override { return 0.09f; } // cursorHeight/graphViewHeight
-
   // InteractiveCurveViewRangeDelegate
   InteractiveCurveViewRangeDelegate::Range computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) override;
 
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 82de5ec6c..4ddb006a6 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -61,9 +61,11 @@ float InteractiveCurveViewController::addMargin(float x, float range, bool isMin
    * topRatioBefore = topRatioAfter, we would create too small margins and the
    * controller might need to pan right after a Y auto calibration. */
 
-  assert(displayBottomMarginRatio()+displayTopMarginRatio() < 1); // Assertion so that the formula is correct
-  float ratioDenominator = 1-displayBottomMarginRatio()-displayTopMarginRatio();
-  float ratio = isMin ? -displayBottomMarginRatio() : displayTopMarginRatio();
+  float topMarginRatio = cursorTopMarginRatio();
+  float bottomMarginRatio = cursorBottomMarginRatio();
+  assert(topMarginRatio + bottomMarginRatio < 1); // Assertion so that the formula is correct
+  float ratioDenominator = 1 - bottomMarginRatio - topMarginRatio;
+  float ratio = isMin ? -bottomMarginRatio : topMarginRatio;
   ratio = ratio / ratioDenominator;
   return x+ratio*range;
 }
@@ -255,8 +257,4 @@ float InteractiveCurveViewController::estimatedBannerHeight() const {
   return BannerView::HeightGivenNumberOfLines(estimatedBannerNumberOfLines());
 }
 
-float InteractiveCurveViewController::displayBottomMarginRatio() {
-  return (curveView()->cursorView()->minimalSizeForOptimalDisplay().height() + 2 + estimatedBannerHeight()) / k_viewHeight;
-}
-
 }
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 2cd15624c..a6871bb9b 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -60,8 +60,6 @@ private:
 
   // InteractiveCurveViewRangeDelegate
   float addMargin(float x, float range, bool isMin) override;
-  virtual float displayTopMarginRatio() = 0;
-  float displayBottomMarginRatio();
 
   uint32_t * m_modelVersion;
   uint32_t * m_rangeVersion;
diff --git a/apps/shared/interactive_curve_view_range_delegate.cpp b/apps/shared/interactive_curve_view_range_delegate.cpp
index 271b7237c..a86d762b9 100644
--- a/apps/shared/interactive_curve_view_range_delegate.cpp
+++ b/apps/shared/interactive_curve_view_range_delegate.cpp
@@ -6,6 +6,9 @@
 namespace Shared {
 
 bool InteractiveCurveViewRangeDelegate::didChangeRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
+  /* When y auto is ticked, top and bottom margins are added to ensure that
+   * the cursor can be move along the curve, in the current x-range,
+   * without panning the window. */
   if (!interactiveCurveViewRange->yAuto()) {
     return false;
   }

From 67f9f79322eaee9093fc0d29d0c42a577f204e2f Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 20 Mar 2019 11:31:33 +0100
Subject: [PATCH 258/295] [apps] Implement
 InteractiveCurveViewController::isCursorVisible

It was a pure virtual method implemented in derived classes
  Shared::FunctionGraphController,
  Regression::GraphController.
InteractiveCurveViewRange does not need anymore to hold CurveViewCursor
* m_cursor.
---
 apps/graph/app.cpp                                |  2 +-
 apps/graph/graph/graph_controller_helper.h        |  3 +--
 apps/regression/graph_controller.cpp              |  5 -----
 apps/regression/graph_controller.h                |  1 -
 apps/regression/store.cpp                         |  2 +-
 apps/sequence/app.cpp                             |  2 +-
 apps/sequence/graph/curve_view_range.cpp          |  4 ++--
 apps/sequence/graph/curve_view_range.h            |  2 +-
 apps/shared/function_graph_controller.cpp         |  4 ----
 apps/shared/function_graph_controller.h           |  1 -
 apps/shared/interactive_curve_view_controller.cpp | 11 +++++++++++
 apps/shared/interactive_curve_view_controller.h   |  2 +-
 apps/shared/interactive_curve_view_range.cpp      |  6 ------
 apps/shared/interactive_curve_view_range.h        |  9 ++-------
 14 files changed, 21 insertions(+), 33 deletions(-)

diff --git a/apps/graph/app.cpp b/apps/graph/app.cpp
index 40d00f345..01ea5285d 100644
--- a/apps/graph/app.cpp
+++ b/apps/graph/app.cpp
@@ -23,7 +23,7 @@ const Image * App::Descriptor::icon() {
 App::Snapshot::Snapshot() :
   Shared::FunctionApp::Snapshot::Snapshot(),
   m_functionStore(),
-  m_graphRange(&m_cursor)
+  m_graphRange()
 {
 }
 
diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index f6c300cf9..acec972a7 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -2,9 +2,8 @@
 #define GRAPH_GRAPH_CONTROLLER_HELPER_H
 
 #include "banner_view.h"
-#include "../../shared/text_field_delegate_app.h"
+#include "../../shared/curve_view_cursor.h"
 #include "../../shared/interactive_curve_view_range.h"
-#include "../cartesian_function_store.h"
 
 namespace Graph {
 
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 1134106c9..1c6d36efb 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -28,7 +28,6 @@ GraphController::GraphController(Responder * parentResponder, InputEventHandlerD
   for (int i = 0; i < Store::k_numberOfSeries; i++) {
     m_modelType[i] = (Model::Type) -1;
   }
-  m_store->setCursor(m_cursor);
   m_store->setDelegate(this);
 }
 
@@ -349,10 +348,6 @@ uint32_t GraphController::rangeVersion() {
   return m_store->rangeChecksum();
 }
 
-bool GraphController::isCursorVisible() {
-  return interactiveCurveViewRange()->isCursorVisible(cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
-}
-
 bool GraphController::closestCurveIndexIsSuitable(int newIndex, int currentIndex) const {
   return newIndex != currentIndex && !m_store->seriesIsEmpty(newIndex);
 }
diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index c3e14ee27..49bc1076e 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -44,7 +44,6 @@ private:
   void initCursorParameters() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
-  bool isCursorVisible() override;
   bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
   double yValue(int curveIndex, double x, Poincare::Context * context) const override;
   bool suitableYValue(double y) const override;
diff --git a/apps/regression/store.cpp b/apps/regression/store.cpp
index 5e342a999..683849169 100644
--- a/apps/regression/store.cpp
+++ b/apps/regression/store.cpp
@@ -17,7 +17,7 @@ static_assert(Model::k_numberOfModels == 9, "Number of models changed, Regressio
 static_assert(Store::k_numberOfSeries == 3, "Number of series changed, Regression::Store() needs to adapt (m_seriesChecksum)");
 
 Store::Store() :
-  InteractiveCurveViewRange(nullptr),
+  InteractiveCurveViewRange(),
   DoublePairStore(),
   m_seriesChecksum{0, 0, 0},
   m_angleUnit(Poincare::Preferences::AngleUnit::Degree)
diff --git a/apps/sequence/app.cpp b/apps/sequence/app.cpp
index f2e1f42c2..b40a26c19 100644
--- a/apps/sequence/app.cpp
+++ b/apps/sequence/app.cpp
@@ -21,7 +21,7 @@ const Image * App::Descriptor::icon() {
 App::Snapshot::Snapshot() :
   Shared::FunctionApp::Snapshot::Snapshot(),
   m_sequenceStore(),
-  m_graphRange(&m_cursor)
+  m_graphRange()
 {
 }
 
diff --git a/apps/sequence/graph/curve_view_range.cpp b/apps/sequence/graph/curve_view_range.cpp
index 444422906..821a152cd 100644
--- a/apps/sequence/graph/curve_view_range.cpp
+++ b/apps/sequence/graph/curve_view_range.cpp
@@ -8,8 +8,8 @@ using namespace Poincare;
 
 namespace Sequence {
 
-CurveViewRange::CurveViewRange(CurveViewCursor * cursor, InteractiveCurveViewRangeDelegate * delegate) :
-  InteractiveCurveViewRange(cursor, delegate)
+CurveViewRange::CurveViewRange(InteractiveCurveViewRangeDelegate * delegate) :
+  InteractiveCurveViewRange(delegate)
 {
   m_xMin = -k_displayLeftMarginRatio * m_xMax;
 }
diff --git a/apps/sequence/graph/curve_view_range.h b/apps/sequence/graph/curve_view_range.h
index ac9316220..cb50fb502 100644
--- a/apps/sequence/graph/curve_view_range.h
+++ b/apps/sequence/graph/curve_view_range.h
@@ -7,7 +7,7 @@ namespace Sequence {
 
 class CurveViewRange : public Shared::InteractiveCurveViewRange {
 public:
-  CurveViewRange(Shared::CurveViewCursor * cursor, Shared::InteractiveCurveViewRangeDelegate * delegate = nullptr);
+  CurveViewRange(Shared::InteractiveCurveViewRangeDelegate * delegate = nullptr);
   void roundAbscissa() override;
   void normalize() override;
   void setTrigonometric() override;
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 56776141e..ab1b09d8d 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -148,10 +148,6 @@ uint32_t FunctionGraphController::rangeVersion() {
   return interactiveCurveViewRange()->rangeChecksum();
 }
 
-bool FunctionGraphController::isCursorVisible() {
-  return interactiveCurveViewRange()->isCursorVisible(cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
-}
-
 bool FunctionGraphController::closestCurveIndexIsSuitable(int newIndex, int currentIndex) const {
   return newIndex != currentIndex;
 }
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index 189ebc09d..bf43ca2df 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -40,7 +40,6 @@ private:
   CurveView * curveView() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
-  bool isCursorVisible() override;
   bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
   double yValue(int curveIndex, double x, Poincare::Context * context) const override;
   int numberOfCurves() const override;
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 4ddb006a6..1c34e476a 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -194,6 +194,17 @@ StackViewController * InteractiveCurveViewController::stackController() const{
   return (StackViewController *)(parentResponder()->parentResponder()->parentResponder());
 }
 
+bool InteractiveCurveViewController::isCursorVisible() {
+  InteractiveCurveViewRange * range = interactiveCurveViewRange();
+  float xRange = range->xMax() - range->xMin();
+  float yRange = range->yMax() - range->yMin();
+  return
+    m_cursor->x() >= range->xMin() +  k_cursorLeftMarginRatio   * xRange &&
+    m_cursor->x() <= range->xMax() - k_cursorRightMarginRatio   * xRange &&
+    m_cursor->y() >= range->yMin() +  cursorBottomMarginRatio() * yRange &&
+    m_cursor->y() <= range->yMax() -     cursorTopMarginRatio() * yRange;
+}
+
 int InteractiveCurveViewController::closestCurveIndexVertically(bool goingUp, int currentCurveIndex, Poincare::Context * context) const {
   double x = m_cursor->x();
   double y = m_cursor->y();
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index a6871bb9b..c1b9fc029 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -37,7 +37,7 @@ protected:
   virtual bool moveCursorVertically(int direction) = 0;
   virtual uint32_t modelVersion() = 0;
   virtual uint32_t rangeVersion() = 0;
-  virtual bool isCursorVisible() = 0;
+  bool isCursorVisible();
 
   // Closest vertical curve helper
   int closestCurveIndexVertically(bool goingUp, int currentSelectedCurve, Poincare::Context * context) const;
diff --git a/apps/shared/interactive_curve_view_range.cpp b/apps/shared/interactive_curve_view_range.cpp
index 7bf8f63eb..bb5ef39a5 100644
--- a/apps/shared/interactive_curve_view_range.cpp
+++ b/apps/shared/interactive_curve_view_range.cpp
@@ -208,12 +208,6 @@ void InteractiveCurveViewRange::panToMakePointVisible(float x, float y, float to
   }
 }
 
-bool InteractiveCurveViewRange::isCursorVisible(float topMarginRatio, float rightMarginRatio, float bottomMarginRation, float leftMarginRation) {
-  float xRange = m_xMax - m_xMin;
-  float yRange = m_yMax - m_yMin;
-  return m_cursor->x() >= m_xMin + leftMarginRation*xRange && m_cursor->x() <= m_xMax - rightMarginRatio*xRange && m_cursor->y() >= m_yMin + bottomMarginRation*yRange && m_cursor->y() <= m_yMax - topMarginRatio*yRange;
-}
-
 float InteractiveCurveViewRange::clipped(float x, bool isMax) {
   float maxF = isMax ? k_upperMaxFloat : k_lowerMaxFloat;
   float minF = isMax ? -k_lowerMaxFloat : -k_upperMaxFloat;
diff --git a/apps/shared/interactive_curve_view_range.h b/apps/shared/interactive_curve_view_range.h
index 6ea5cb4ef..fc695ccd7 100644
--- a/apps/shared/interactive_curve_view_range.h
+++ b/apps/shared/interactive_curve_view_range.h
@@ -3,7 +3,6 @@
 
 #include <stdint.h>
 #include "memoized_curve_view_range.h"
-#include "curve_view_cursor.h"
 #include "interactive_curve_view_range_delegate.h"
 #include <ion/display.h>
 #include <float.h>
@@ -13,15 +12,13 @@ namespace Shared {
 class InteractiveCurveViewRange : public MemoizedCurveViewRange {
 public:
   constexpr static float k_minFloat = 1E-4f;
-  InteractiveCurveViewRange(CurveViewCursor * cursor, InteractiveCurveViewRangeDelegate * delegate = nullptr) :
+  InteractiveCurveViewRange(InteractiveCurveViewRangeDelegate * delegate = nullptr) :
     MemoizedCurveViewRange(),
     m_yAuto(true),
-    m_delegate(delegate),
-    m_cursor(cursor)
+    m_delegate(delegate)
   {}
 
   void setDelegate(InteractiveCurveViewRangeDelegate * delegate) { m_delegate = delegate; }
-  void setCursor(CurveViewCursor * cursor) { m_cursor = cursor; }
   uint32_t rangeChecksum() override;
 
   bool yAuto() const { return m_yAuto; }
@@ -42,7 +39,6 @@ public:
   virtual void setDefault();
   void centerAxisAround(Axis axis, float position);
   void panToMakePointVisible(float x, float y, float topMarginRatio, float rightMarginRatio, float bottomMarginRation, float leftMarginRation);
-  bool isCursorVisible(float topMarginRatio, float rightMarginRatio, float bottomMarginRation, float leftMarginRation);
 protected:
   bool m_yAuto;
   /* In normalized settings, we put each axis so that 1cm = 2 units. For now,
@@ -64,7 +60,6 @@ private:
   constexpr static float k_lowerMaxFloat = 9E+7f;
   constexpr static float k_maxRatioPositionRange = 1E5f;
   void notifyRangeChange();
-  CurveViewCursor * m_cursor;
 };
 
 static_assert(InteractiveCurveViewRange::k_minFloat >= FLT_EPSILON, "InteractiveCurveViewRange's minimal float range is lower than float precision, it might draw uglily curves such as cos(x)^2+sin(x)^2");

From f6ceae3b8b062e4f4ad9bdfb7bd2e885f954e6a4 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 20 Mar 2019 12:06:40 +0100
Subject: [PATCH 259/295] [apps] Factorize
 SimpleInteractiveCurveView::moveCursorHorizontally

---
 apps/graph/graph/calculation_graph_controller.cpp        | 1 -
 apps/graph/graph/graph_controller.cpp                    | 2 +-
 apps/graph/graph/graph_controller_helper.cpp             | 3 +--
 apps/graph/graph/graph_controller_helper.h               | 2 +-
 apps/graph/graph/tangent_graph_controller.cpp            | 2 +-
 apps/regression/graph_controller.cpp                     | 3 ---
 apps/sequence/graph/graph_controller.cpp                 | 1 -
 apps/shared/simple_interactive_curve_view_controller.cpp | 4 ++++
 8 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 192301fd9..77bb2c740 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -76,7 +76,6 @@ bool CalculationGraphController::moveCursorHorizontally(int direction) {
     return false;
   }
   m_cursor->moveTo(newPointOfInterest.abscissa, newPointOfInterest.value);
-  m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index a3153d34e..244cb995f 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -81,7 +81,7 @@ void GraphController::reloadBannerView() {
 bool GraphController::moveCursorHorizontally(int direction) {
   Ion::Storage::Record record = functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor());
   App * myApp = static_cast<App *>(app());
-  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, record, myApp, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, record, myApp);
 }
 
 InteractiveCurveViewRange * GraphController::interactiveCurveViewRange() {
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index 65d3ac8b4..00adae62c 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -9,13 +9,12 @@ using namespace Poincare;
 
 namespace Graph {
 
-bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio) {
+bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app) {
   ExpiringPointer<CartesianFunction> function = app->functionStore()->modelForRecord(record);
   double xCursorPosition = cursor->x();
   double x = direction > 0 ? xCursorPosition + range->xGridUnit()/numberOfStepsInGradUnit : xCursorPosition -  range->xGridUnit()/numberOfStepsInGradUnit;
   double y = function->evaluateAtAbscissa(x, app->localContext());
   cursor->moveTo(x, y);
-  range->panToMakePointVisible(x, y, cursorTopMarginRatio, cursorRightMarginRatio, cursorBottomMarginRatio, cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index acec972a7..811a99f79 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -11,7 +11,7 @@ class App;
 
 class GraphControllerHelper {
 protected:
-  bool privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio);
+  bool privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, App * app);
   void reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, Ion::Storage::Record record, App * app);
   virtual BannerView * bannerView() = 0;
 };
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index 68acdedf9..ed93596f8 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -61,7 +61,7 @@ void TangentGraphController::reloadBannerView() {
 
 bool TangentGraphController::moveCursorHorizontally(int direction) {
   App * myApp = static_cast<App *>(app());
-  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, m_record, myApp, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+  return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, m_record, myApp);
 }
 
 bool TangentGraphController::handleEnter() {
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 1c6d36efb..9bed213f0 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -219,13 +219,11 @@ bool GraphController::moveCursorHorizontally(int direction) {
     if (dotSelected >= 0 && dotSelected < m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
       *m_selectedDotIndex = dotSelected;
       m_cursor->moveTo(m_store->get(*m_selectedSeriesIndex, 0, *m_selectedDotIndex), m_store->get(*m_selectedSeriesIndex, 1, *m_selectedDotIndex));
-      m_store->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
       return true;
     }
     if (dotSelected == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
       *m_selectedDotIndex = dotSelected;
       m_cursor->moveTo(m_store->meanOfColumn(*m_selectedSeriesIndex, 0), m_store->meanOfColumn(*m_selectedSeriesIndex, 1));
-      m_store->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
       return true;
     }
     return false;
@@ -234,7 +232,6 @@ bool GraphController::moveCursorHorizontally(int direction) {
     m_cursor->x() - m_store->xGridUnit()/k_numberOfCursorStepsInGradUnit;
   double y = yValue(*m_selectedSeriesIndex, x, globalContext());
   m_cursor->moveTo(x, y);
-  m_store->panToMakePointVisible(x, y, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 5b4410c86..9405286be 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -84,7 +84,6 @@ bool GraphController::moveCursorHorizontally(int direction) {
   TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
   double y = s->evaluateAtAbscissa(x, myApp->localContext());
   m_cursor->moveTo(x, y);
-  m_graphRange->panToMakePointVisible(x, y, cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/shared/simple_interactive_curve_view_controller.cpp b/apps/shared/simple_interactive_curve_view_controller.cpp
index d2d43d41e..b2cacd88d 100644
--- a/apps/shared/simple_interactive_curve_view_controller.cpp
+++ b/apps/shared/simple_interactive_curve_view_controller.cpp
@@ -39,6 +39,10 @@ bool SimpleInteractiveCurveViewController::handleZoom(Ion::Events::Event event)
 bool SimpleInteractiveCurveViewController::handleLeftRightEvent(Ion::Events::Event event) {
   int direction = event == Ion::Events::Left ? -1 : 1;
   if (moveCursorHorizontally(direction)) {
+    interactiveCurveViewRange()->panToMakePointVisible(
+      m_cursor->x(), m_cursor->y(),
+      cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio
+    );
     reloadBannerView();
     curveView()->reload();
     return true;

From 94cf542ba3bbb532c29114d7b5d48a2f16f8b67e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 20 Mar 2019 13:44:21 +0100
Subject: [PATCH 260/295] [apps] Factorize
 InteractiveCurveViewController::moveCursorVertically

---
 apps/regression/graph_controller.cpp              | 3 ---
 apps/shared/function_graph_controller.cpp         | 1 -
 apps/shared/interactive_curve_view_controller.cpp | 4 ++++
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 9bed213f0..bdd02c7fd 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -312,7 +312,6 @@ bool GraphController::moveCursorVertically(int direction) {
     *m_selectedSeriesIndex = closestRegressionSeries;
     selectRegressionCurve();
     m_cursor->moveTo(x, yValue(*m_selectedSeriesIndex, x, context));
-    m_store->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
     return true;
   }
 
@@ -324,11 +323,9 @@ bool GraphController::moveCursorVertically(int direction) {
     if (dotSelected == m_store->numberOfPairsOfSeries(*m_selectedSeriesIndex)) {
       // Select the mean dot
       m_cursor->moveTo(m_store->meanOfColumn(*m_selectedSeriesIndex, 0), m_store->meanOfColumn(*m_selectedSeriesIndex, 1));
-      m_store->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
     } else {
       // Select a data point dot
       m_cursor->moveTo(m_store->get(*m_selectedSeriesIndex, 0, *m_selectedDotIndex), m_store->get(*m_selectedSeriesIndex, 1, *m_selectedDotIndex));
-      m_store->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
     }
     return true;
   }
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index ab1b09d8d..361017c7e 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -132,7 +132,6 @@ bool FunctionGraphController::moveCursorVertically(int direction) {
   }
   selectFunctionWithCursor(nextActiveFunctionIndex);
   m_cursor->moveTo(m_cursor->x(), yValue(nextActiveFunctionIndex, m_cursor->x(), context));
-  interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
   return true;
 }
 
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 1c34e476a..fc56c716f 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -97,6 +97,10 @@ bool InteractiveCurveViewController::handleEvent(Ion::Events::Event event) {
   if (event == Ion::Events::Down || event == Ion::Events::Up) {
     int direction = event == Ion::Events::Down ? -1 : 1;
     if (moveCursorVertically(direction)) {
+      interactiveCurveViewRange()->panToMakePointVisible(
+        m_cursor->x(), m_cursor->y(),
+        cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio
+      );
       reloadBannerView();
       curveView()->reload();
       return true;

From 7b5c891f44bcfef290980f853944498ee3d8bf25 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 26 Mar 2019 15:48:19 +0100
Subject: [PATCH 261/295] [apps/shared] Clean
 InteractiveCurveViewController::handleEvent

---
 apps/shared/interactive_curve_view_controller.cpp | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index fc56c716f..9ffc28ef9 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -91,9 +91,6 @@ bool InteractiveCurveViewController::handleEvent(Ion::Events::Event event) {
     }
     return false;
   }
-  if (SimpleInteractiveCurveViewController::handleEvent(event)) {
-    return true;
-  }
   if (event == Ion::Events::Down || event == Ion::Events::Up) {
     int direction = event == Ion::Events::Down ? -1 : 1;
     if (moveCursorVertically(direction)) {
@@ -105,14 +102,14 @@ bool InteractiveCurveViewController::handleEvent(Ion::Events::Event event) {
       curveView()->reload();
       return true;
     }
-    if (event == Ion::Events::Down) {
-      return false;
+    if (event == Ion::Events::Up) {
+      curveView()->selectMainView(false);
+      header()->setSelectedButton(0);
+      return true;
     }
-    curveView()->selectMainView(false);
-    header()->setSelectedButton(0);
-    return true;
+    return false;
   }
-  return false;
+  return SimpleInteractiveCurveViewController::handleEvent(event);
 }
 
 void InteractiveCurveViewController::didBecomeFirstResponder() {

From a8650f71915da6a001cb64fa2eb143fe7110015e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Mon, 18 Mar 2019 15:44:20 +0100
Subject: [PATCH 262/295] [apps/shared] SimpleInteractiveCurveViewController
 inherits from TextFieldDelegate

---
 apps/shared/simple_interactive_curve_view_controller.h | 8 ++++++--
 apps/shared/sum_graph_controller.h                     | 5 +----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index b25397e41..7a71c100b 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -1,7 +1,8 @@
 #ifndef SHARED_SIMPLE_INTERACTIVE_CURVE_VIEW_CONTROLLER_H
 #define SHARED_SIMPLE_INTERACTIVE_CURVE_VIEW_CONTROLLER_H
 
-#include <escher.h>
+#include <escher/view_controller.h>
+#include "text_field_delegate.h"
 #include "interactive_curve_view_range.h"
 #include "curve_view_cursor.h"
 #include "curve_view.h"
@@ -11,12 +12,15 @@ namespace Shared {
 /* SimpleInteractiveCurveViewController is a View controller with a cursor that
  * can handles zoom in/out and left and right events. */
 
-class SimpleInteractiveCurveViewController : public ViewController {
+class SimpleInteractiveCurveViewController : public ViewController, public TextFieldDelegate {
 public:
   SimpleInteractiveCurveViewController(Responder * parentResponder, CurveViewCursor * cursor);
   View * view() override;
   bool handleEvent(Ion::Events::Event event) override;
 protected:
+  TextFieldDelegateApp * textFieldDelegateApp() override {
+    return static_cast<TextFieldDelegateApp *>(app());
+  }
   constexpr static float k_cursorRightMarginRatio = 0.04f; // (cursorWidth/2)/graphViewWidth
   constexpr static float k_cursorLeftMarginRatio = 0.04f;  // (cursorWidth/2)/graphViewWidth
   virtual float cursorTopMarginRatio() { return 0.07f; }   // (cursorHeight/2)/graphViewHeight
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index b33d4e0a8..baaa10595 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -11,7 +11,7 @@
 
 namespace Shared {
 
-class SumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
+class SumGraphController : public SimpleInteractiveCurveViewController {
 public:
   SumGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, CodePoint sumSymbol);
   void viewWillAppear() override;
@@ -41,9 +41,6 @@ private:
   void reloadBannerView() override;
   Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
   Shared::CurveView * curveView() override { return m_graphView; }
-  TextFieldDelegateApp * textFieldDelegateApp() override {
-    return static_cast<TextFieldDelegateApp *>(app());
-  }
   virtual I18n::Message legendMessageAtStep(Step step) = 0;
   virtual double cursorNextStep(double position, int direction) = 0;
   virtual Poincare::Layout createFunctionLayout(ExpiringPointer<Function> function) = 0;

From ba6282be4520771b9cf63cec63232dcfcd1d7084 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Fri, 22 Mar 2019 10:03:48 +0100
Subject: [PATCH 263/295] [apps/shared] Remove
 InteractiveCurveViewController::didEnterResponderChain

In order to avoid reloading after Ion::Events::Toolbox/Var, but only in
viewWillAppear.
The previous behavior was masking a bug in
Regression::GraphController::viewWillAppear where the cursor could be
moved after reloading the bannerView.
---
 apps/regression/graph_controller.cpp          | 55 +++++++++++++------
 .../interactive_curve_view_controller.cpp     |  5 --
 .../interactive_curve_view_controller.h       |  1 -
 3 files changed, 37 insertions(+), 24 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index bdd02c7fd..164393404 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -1,7 +1,6 @@
 #include "graph_controller.h"
 #include "../shared/poincare_helpers.h"
 #include "../apps_container.h"
-#include <kandinsky/font.h>
 #include <cmath>
 
 using namespace Poincare;
@@ -44,16 +43,43 @@ I18n::Message GraphController::emptyMessage() {
 }
 
 void GraphController::viewWillAppear() {
-  InteractiveCurveViewController::viewWillAppear();
-  if (m_modelType[*m_selectedSeriesIndex] != m_store->seriesRegressionType(*m_selectedSeriesIndex)) {
-    initCursorParameters();
-  }
-  for (int i = 0; i < Store::k_numberOfSeries; i++) {
-    m_modelType[i] = m_store->seriesRegressionType(*m_selectedSeriesIndex);
-  }
+  /* At this point, there is at least one non-empty series.
+   * However, before the graph view appears for the very first time,
+   * *m_selectedSeriesIndex is set to -1. Thus one needs to select a series.
+   * TODO Perhaps the three following lines should be moved elsewhere. */
   if (*m_selectedSeriesIndex < 0) {
     *m_selectedSeriesIndex = m_store->indexOfKthNonEmptySeries(0);
   }
+
+  /* Both the GraphController and the Store hold the Model::Type of each
+   * series. The values differ in two cases:
+   *  1) the very first time the graph view appears
+   *  2) when the user selects another Model::Type for a series.
+   * where we decide to place the cursor at a default position. */
+  if (m_modelType[*m_selectedSeriesIndex] != m_store->seriesRegressionType(*m_selectedSeriesIndex)) {
+    initCursorParameters();
+  }
+
+  /* Equalize the Model::Type of each series between the GraphController and
+   * the Store.
+   * TODO In passing, one may probably avoid keeping the Model::Type of each
+   * series in two places:
+   *  1) call initCursorParameters elsewhere the very first time the graph view
+   *     appears,
+   *  2) take into account the Model::Type in the computation of the
+   *     storeChecksum in order to detect any change in the series and in
+   *     their model types. */
+  for (int i = 0; i < Store::k_numberOfSeries; i++) {
+    m_modelType[i] = m_store->seriesRegressionType(*m_selectedSeriesIndex);
+  }
+
+  /* The following
+   *   - calls initCursorParameters() if necessary,
+   *   - reloads the bannerView and the curveView. */
+  InteractiveCurveViewController::viewWillAppear();
+
+  /* Since *m_selectedDotIndex is altered by initCursorParameters(),
+   * the following must absolutely come at the end. */
   if (*m_selectedDotIndex >= 0) {
     m_view.setCursorView(static_cast<View *>(&m_crossCursorView));
   } else {
@@ -77,10 +103,6 @@ Poincare::Context * GraphController::globalContext() {
 // SimpleInteractiveCurveViewController
 
 void GraphController::reloadBannerView() {
-  if (*m_selectedSeriesIndex < 0) {
-    return;
-  }
-
   // Set point equals: "P(...) ="
   constexpr size_t bufferSize = k_maxNumberOfCharacters + PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
@@ -138,12 +160,12 @@ void GraphController::reloadBannerView() {
   m_bannerView.ordinateView()->setText(buffer);
 
   // Set formula
-  Model * model = m_store->modelForSeries(selectedSeriesIndex());
+  Model * model = m_store->modelForSeries(*m_selectedSeriesIndex);
   I18n::Message formula = model->formulaMessage();
   m_bannerView.regressionTypeView()->setMessage(formula);
 
   // Get the coefficients
-  double * coefficients = m_store->coefficientsForSeries(selectedSeriesIndex(), globalContext());
+  double * coefficients = m_store->coefficientsForSeries(*m_selectedSeriesIndex, globalContext());
   bool coefficientsAreDefined = true;
   for (int i = 0; i < model->numberOfCoefficients(); i++) {
     if (std::isnan(coefficients[i])) {
@@ -180,7 +202,7 @@ void GraphController::reloadBannerView() {
     coefficientName++;
   }
 
-  if (m_store->seriesRegressionType(selectedSeriesIndex()) == Model::Type::Linear) {
+  if (m_store->seriesRegressionType(*m_selectedSeriesIndex) == Model::Type::Linear) {
     // Set "r=..."
     numberOfChar = 0;
     legend = " r=";
@@ -250,9 +272,6 @@ bool GraphController::handleEnter() {
 
 // InteractiveCurveViewController
 void GraphController::initCursorParameters() {
-  if (*m_selectedSeriesIndex < 0 || m_store->seriesIsEmpty(*m_selectedSeriesIndex)) {
-    *m_selectedSeriesIndex = m_store->indexOfKthNonEmptySeries(0);
-  }
   double x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   double y = m_store->meanOfColumn(*m_selectedSeriesIndex, 1);
   m_cursor->moveTo(x, y);
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 9ffc28ef9..08a4f1687 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -174,11 +174,6 @@ void InteractiveCurveViewController::viewDidDisappear() {
   *m_rangeVersion = rangeVersion();
 }
 
-void InteractiveCurveViewController::didEnterResponderChain(Responder * previousFirstResponder) {
-  reloadBannerView();
-  curveView()->reload();
-}
-
 void InteractiveCurveViewController::willExitResponderChain(Responder * nextFirstResponder) {
   if (nextFirstResponder == nullptr || nextFirstResponder == tabController()) {
     curveView()->selectMainView(false);
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index c1b9fc029..6ff234718 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -28,7 +28,6 @@ public:
 
   void viewWillAppear() override;
   void viewDidDisappear() override;
-  void didEnterResponderChain(Responder * previousFirstResponder) override;
   void willExitResponderChain(Responder * nextFirstResponder) override;
 protected:
   Responder * tabController() const;

From 4d640e291677dead6ea202971117268a435b2c95 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Mon, 18 Mar 2019 15:49:29 +0100
Subject: [PATCH 264/295] [apps] XYBannerView: prepare constructor so the class
 may contain TextField

---
 apps/graph/graph/banner_view.cpp         | 8 ++++++--
 apps/graph/graph/banner_view.h           | 6 +++++-
 apps/graph/graph/graph_controller.cpp    | 2 +-
 apps/regression/banner_view.cpp          | 8 ++++++--
 apps/regression/banner_view.h            | 6 +++++-
 apps/regression/graph_controller.cpp     | 2 +-
 apps/sequence/graph/graph_controller.cpp | 2 +-
 apps/shared/xy_banner_view.cpp           | 6 +++++-
 apps/shared/xy_banner_view.h             | 6 +++++-
 9 files changed, 35 insertions(+), 11 deletions(-)

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index 7c22d99ee..a6390ff28 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -4,8 +4,12 @@
 
 namespace Graph {
 
-BannerView::BannerView() :
-  Shared::XYBannerView(),
+BannerView::BannerView(
+  Responder * parentResponder,
+  InputEventHandlerDelegate * inputEventHandlerDelegate,
+  TextFieldDelegate * textFieldDelegate
+) :
+  Shared::XYBannerView(parentResponder, inputEventHandlerDelegate, textFieldDelegate),
   m_derivativeView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_tangentEquationView(KDFont::SmallFont, I18n::Message::LinearRegressionFormula, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_aView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index d9a3f3416..8f8989b26 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -7,7 +7,11 @@ namespace Graph {
 
 class BannerView : public Shared::XYBannerView {
 public:
-  BannerView();
+  BannerView(
+    Responder * parentResponder,
+    InputEventHandlerDelegate * inputEventHandlerDelegate,
+    TextFieldDelegate * textFieldDelegate
+  );
   BufferTextView * derivativeView() { return &m_derivativeView; }
   BufferTextView * aView() { return &m_aView; }
   BufferTextView * bView() { return &m_bView; }
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index 244cb995f..c544b235b 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -9,7 +9,7 @@ static inline float maxFloat(float x, float y) { return x > y ? x : y; }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, CartesianFunctionStore * functionStore, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
   FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, curveViewRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
-  m_bannerView(),
+  m_bannerView(this, inputEventHandlerDelegate, this),
   m_view(functionStore, curveViewRange, m_cursor, &m_bannerView, &m_cursorView),
   m_graphRange(curveViewRange),
   m_curveParameterController(inputEventHandlerDelegate, curveViewRange, &m_bannerView, m_cursor, &m_view, this),
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index 69fbccb6b..e1f1135c8 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -6,8 +6,12 @@ namespace Regression {
 constexpr KDColor BannerView::k_textColor;
 constexpr KDColor BannerView::k_backgroundColor;
 
-BannerView::BannerView() :
-  Shared::XYBannerView(),
+BannerView::BannerView(
+  Responder * parentResponder,
+  InputEventHandlerDelegate * inputEventHandlerDelegate,
+  TextFieldDelegate * textFieldDelegate
+) :
+  Shared::XYBannerView(parentResponder, inputEventHandlerDelegate, textFieldDelegate),
   m_dotNameView(k_font, 0.0f, 0.5f, k_textColor, k_backgroundColor),
   m_regressionTypeView(k_font, (I18n::Message)0, 0.0f, 0.5f, k_textColor,k_backgroundColor),
   m_subText0(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index b48496e1b..b6cf1292d 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -7,7 +7,11 @@ namespace Regression {
 
 class BannerView : public Shared::XYBannerView {
 public:
-  BannerView();
+  BannerView(
+    Responder * parentResponder,
+    InputEventHandlerDelegate * inputEventHandlerDelegate,
+    TextFieldDelegate * textFieldDelegate
+  );
   BufferTextView * dotNameView() { return &m_dotNameView; }
   MessageTextView * regressionTypeView() { return &m_regressionTypeView; }
   BufferTextView * subTextAtIndex(int index);
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 164393404..46d6b5e1d 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -16,7 +16,7 @@ GraphController::GraphController(Responder * parentResponder, InputEventHandlerD
   InteractiveCurveViewController(parentResponder, inputEventHandlerDelegate, header, store, &m_view, cursor, modelVersion, rangeVersion),
   m_crossCursorView(),
   m_roundCursorView(),
-  m_bannerView(),
+  m_bannerView(this, inputEventHandlerDelegate, this),
   m_view(store, m_cursor, &m_bannerView, &m_crossCursorView, this),
   m_store(store),
   m_initialisationParameterController(this, m_store),
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 9405286be..a104d2abf 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -12,7 +12,7 @@ static inline int maxInt(int x, int y) { return (x > y ? x : y); }
 
 GraphController::GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header) :
   FunctionGraphController(parentResponder, inputEventHandlerDelegate, header, graphRange, &m_view, cursor, indexFunctionSelectedByCursor, modelVersion, rangeVersion, angleUnitVersion),
-  m_bannerView(),
+  m_bannerView(this, inputEventHandlerDelegate, this),
   m_view(sequenceStore, graphRange, m_cursor, &m_bannerView, &m_cursorView),
   m_graphRange(graphRange),
   m_curveParameterController(inputEventHandlerDelegate, this, graphRange, m_cursor),
diff --git a/apps/shared/xy_banner_view.cpp b/apps/shared/xy_banner_view.cpp
index 453f8206e..39719f57d 100644
--- a/apps/shared/xy_banner_view.cpp
+++ b/apps/shared/xy_banner_view.cpp
@@ -3,7 +3,11 @@
 
 namespace Shared {
 
-XYBannerView::XYBannerView() :
+XYBannerView::XYBannerView(
+  Responder * parentResponder,
+  InputEventHandlerDelegate * inputEventHandlerDelegate,
+  TextFieldDelegate * textFieldDelegate
+) :
   m_abscissaView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
   m_ordinateView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle)
 {
diff --git a/apps/shared/xy_banner_view.h b/apps/shared/xy_banner_view.h
index 5b13aa2fd..0fea43767 100644
--- a/apps/shared/xy_banner_view.h
+++ b/apps/shared/xy_banner_view.h
@@ -7,7 +7,11 @@ namespace Shared {
 
 class XYBannerView : public BannerView {
 public:
-  XYBannerView();
+  XYBannerView(
+    Responder * parentResponder,
+    InputEventHandlerDelegate * inputEventHandlerDelegate,
+    TextFieldDelegate * textFieldDelegate
+  );
   BufferTextView * abscissaView() { return &m_abscissaView; }
   BufferTextView * ordinateView() { return &m_ordinateView; }
   static constexpr int k_numberOfSubviews = 2;

From 26d59bbd744501d761e4dc7cbfa2b79982674d2c Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 27 Feb 2019 10:24:06 +0100
Subject: [PATCH 265/295] [apps/shared] Simplify BannerView methods

---
 apps/shared/banner_view.cpp | 58 ++++++++++++++++---------------------
 1 file changed, 25 insertions(+), 33 deletions(-)

diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 0f7ff8af2..3420c5c1e 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -1,5 +1,5 @@
 #include "banner_view.h"
-#include <string.h>
+#include <assert.h>
 
 namespace Shared {
 
@@ -12,61 +12,53 @@ KDSize BannerView::minimalSizeForOptimalDisplay() const {
 }
 
 void BannerView::layoutSubviews() {
+  assert(!m_frame.isEmpty());
   /* We iterate on subviews, adding their width until we exceed the view bound.
   * The last subview that exceeds the bound is recorded as the first subview of
   * the next line. For the current line, we scan again the subviews and frame
   * them by equally distributing the remaining width. We then jump to the next
   * line and iterate the process. */
-  KDCoordinate totalWidth = bounds().width();
-  KDCoordinate lineWidth = 0;
-  View * textViewPreviousLine = subviewAtIndex(0);
+  const KDCoordinate lineWidth = m_frame.width();
+  KDCoordinate remainingWidth = lineWidth;
   int indexOfFirstViewOfCurrentLine = 0;
   KDCoordinate y = 0;
   /* We do a last iteration of the loop to layout the last line. */
   for (int i = 0; i <= numberOfSubviews(); i++) {
-    View * textView = nullptr;
-    KDCoordinate currentViewWidth = totalWidth;
-    if (i < numberOfSubviews()) {
-      textView = subviewAtIndex(i);
-      currentViewWidth = textView->minimalSizeForOptimalDisplay().width();
-    }
-    // The subview exceed the total width
-    if (lineWidth + currentViewWidth > totalWidth) {
+    KDCoordinate subviewWidth = (i < numberOfSubviews()) ? subviewAtIndex(i)->minimalSizeForOptimalDisplay().width() : lineWidth;
+    if (subviewWidth > remainingWidth) {
       KDCoordinate x = 0;
-      int nbOfTextViewInLine = i > indexOfFirstViewOfCurrentLine ? i-indexOfFirstViewOfCurrentLine : 1;
-      KDCoordinate roundingError = totalWidth-lineWidth-nbOfTextViewInLine*(int)((totalWidth-lineWidth)/nbOfTextViewInLine);
+      int nbOfSubviewsOnLine = i > indexOfFirstViewOfCurrentLine ? i-indexOfFirstViewOfCurrentLine : 1;
+      KDCoordinate roundingError = remainingWidth % nbOfSubviewsOnLine;
+      View * subviewPreviousLine = nullptr;
       for (int j = indexOfFirstViewOfCurrentLine; j < i; j++) {
-        textViewPreviousLine = subviewAtIndex(j);
-        KDCoordinate textWidth = textViewPreviousLine->minimalSizeForOptimalDisplay().width() + (totalWidth - lineWidth)/nbOfTextViewInLine;
-        // For the last text view, avoid letting a 1-pixel-wide empty vertical due to rounding error:
-        textWidth = j == i-1 ? textWidth + roundingError : textWidth;
-        KDCoordinate textHeight = textViewPreviousLine->minimalSizeForOptimalDisplay().height();
-        textViewPreviousLine->setFrame(KDRect(x, y, textWidth, textHeight));
-        x += textWidth;
+        subviewPreviousLine = subviewAtIndex(j);
+        KDCoordinate width = subviewPreviousLine->minimalSizeForOptimalDisplay().width() + remainingWidth/nbOfSubviewsOnLine + (j == i-1) * roundingError;
+        KDCoordinate height = subviewPreviousLine->minimalSizeForOptimalDisplay().height();
+        subviewPreviousLine->setFrame(KDRect(x, y, width, height));
+        x += width;
       }
       // Next line
-      y += textViewPreviousLine->minimalSizeForOptimalDisplay().height();
-      lineWidth = 0;
+      y += subviewPreviousLine->minimalSizeForOptimalDisplay().height();
+      remainingWidth = lineWidth;
       indexOfFirstViewOfCurrentLine = i;
     }
-    lineWidth += currentViewWidth;
+    remainingWidth -= subviewWidth;
   }
 }
 
 int BannerView::numberOfLines() const {
-  KDCoordinate width = bounds().width();
-  KDCoordinate usedWidth = 0;
-  KDCoordinate lineNumber = 0;
+  int lineNumber = 1;
+  const KDCoordinate lineWidth = m_frame.width();
+  KDCoordinate remainingWidth = lineWidth;
   for (int i = 0; i < numberOfSubviews(); i++) {
-    KDCoordinate textWidth = const_cast<Shared::BannerView *>(this)->subviewAtIndex(i)->minimalSizeForOptimalDisplay().width();
-    if (usedWidth+textWidth > width) {
-      usedWidth = textWidth;
+    KDCoordinate subviewWidth = const_cast<Shared::BannerView *>(this)->subviewAtIndex(i)->minimalSizeForOptimalDisplay().width();
+    if (subviewWidth > remainingWidth) {
+      remainingWidth = lineWidth;
       lineNumber++;
-    } else {
-      usedWidth += textWidth;
     }
+    remainingWidth -= subviewWidth;
   }
-  return lineNumber+1;
+  return lineNumber;
 }
 
 }

From 339258a29d471f2adc69dea52e04d02188feaec0 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 27 Mar 2019 17:19:56 +0100
Subject: [PATCH 266/295] [apps/shared] Add LineSpacing to BannerView

---
 apps/shared/banner_view.cpp | 15 ++++++++++++---
 apps/shared/banner_view.h   |  2 ++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 3420c5c1e..3ca4e8dd8 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -4,7 +4,16 @@
 namespace Shared {
 
 KDCoordinate BannerView::HeightGivenNumberOfLines(int linesCount) {
-  return KDFont::SmallFont->glyphSize().height()*linesCount;
+  return LineSpacing + (KDFont::SmallFont->glyphSize().height() + LineSpacing) * linesCount;
+}
+
+void BannerView::drawRect(KDContext * ctx, KDRect rect) const {
+  const KDCoordinate frameHeight = minimalSizeForOptimalDisplay().height();
+  const KDCoordinate lineHeight = KDFont::SmallFont->glyphSize().height() + LineSpacing;
+  const KDCoordinate lineWidth = m_frame.width();
+  for (KDCoordinate y = 0; y < frameHeight; y += lineHeight) {
+    ctx->fillRect(KDRect(0, y, lineWidth, LineSpacing), Palette::GreyMiddle);
+  }
 }
 
 KDSize BannerView::minimalSizeForOptimalDisplay() const {
@@ -21,7 +30,7 @@ void BannerView::layoutSubviews() {
   const KDCoordinate lineWidth = m_frame.width();
   KDCoordinate remainingWidth = lineWidth;
   int indexOfFirstViewOfCurrentLine = 0;
-  KDCoordinate y = 0;
+  KDCoordinate y = LineSpacing;
   /* We do a last iteration of the loop to layout the last line. */
   for (int i = 0; i <= numberOfSubviews(); i++) {
     KDCoordinate subviewWidth = (i < numberOfSubviews()) ? subviewAtIndex(i)->minimalSizeForOptimalDisplay().width() : lineWidth;
@@ -38,7 +47,7 @@ void BannerView::layoutSubviews() {
         x += width;
       }
       // Next line
-      y += subviewPreviousLine->minimalSizeForOptimalDisplay().height();
+      y += subviewPreviousLine->minimalSizeForOptimalDisplay().height() + LineSpacing;
       remainingWidth = lineWidth;
       indexOfFirstViewOfCurrentLine = i;
     }
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index b659b9cc9..eb33b6563 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -8,9 +8,11 @@ namespace Shared {
 class BannerView : public View {
 public:
   static KDCoordinate HeightGivenNumberOfLines(int linesCount);
+  void drawRect(KDContext * ctx, KDRect rect) const override;
   KDSize minimalSizeForOptimalDisplay() const override;
   void reload() { layoutSubviews(); }
 private:
+  static constexpr KDCoordinate LineSpacing = 2;
   int numberOfSubviews() const override = 0;
   View * subviewAtIndex(int index) override = 0;
   void layoutSubviews() override;

From 5ff19a2506477c9bd63f5613c63ec1beb71cc017 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 26 Mar 2019 11:39:25 +0100
Subject: [PATCH 267/295] [apps] Define Font, Text/BackgroundColor BannerView
 static methods

---
 apps/graph/graph/banner_view.cpp                |  8 ++++----
 .../graph/calculation_graph_controller.cpp      |  2 +-
 apps/regression/banner_view.cpp                 | 17 +++++++----------
 apps/regression/banner_view.h                   |  4 ----
 apps/regression/graph_controller.cpp            |  2 +-
 apps/shared/banner_view.cpp                     |  6 +++---
 apps/shared/banner_view.h                       |  3 +++
 apps/shared/xy_banner_view.cpp                  |  4 ++--
 apps/statistics/box_banner_view.cpp             |  6 +++---
 apps/statistics/histogram_banner_view.cpp       | 12 ++++++------
 10 files changed, 30 insertions(+), 34 deletions(-)

diff --git a/apps/graph/graph/banner_view.cpp b/apps/graph/graph/banner_view.cpp
index a6390ff28..fa900c652 100644
--- a/apps/graph/graph/banner_view.cpp
+++ b/apps/graph/graph/banner_view.cpp
@@ -10,10 +10,10 @@ BannerView::BannerView(
   TextFieldDelegate * textFieldDelegate
 ) :
   Shared::XYBannerView(parentResponder, inputEventHandlerDelegate, textFieldDelegate),
-  m_derivativeView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_tangentEquationView(KDFont::SmallFont, I18n::Message::LinearRegressionFormula, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_aView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_bView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
+  m_derivativeView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_tangentEquationView(Font(), I18n::Message::LinearRegressionFormula, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_aView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_bView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
   m_numberOfSubviews(Shared::XYBannerView::k_numberOfSubviews)
 {
 }
diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 77bb2c740..847bbc8b9 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -12,7 +12,7 @@ CalculationGraphController::CalculationGraphController(Responder * parentRespond
   m_bannerView(bannerView),
   m_graphRange(curveViewRange),
   m_record(),
-  m_defaultBannerView(KDFont::SmallFont, defaultMessage, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
+  m_defaultBannerView(BannerView::Font(), defaultMessage, 0.5f, 0.5f, BannerView::TextColor(), BannerView::BackgroundColor()),
   m_isActive(false)
 {
 }
diff --git a/apps/regression/banner_view.cpp b/apps/regression/banner_view.cpp
index e1f1135c8..640e782f5 100644
--- a/apps/regression/banner_view.cpp
+++ b/apps/regression/banner_view.cpp
@@ -3,22 +3,19 @@
 
 namespace Regression {
 
-constexpr KDColor BannerView::k_textColor;
-constexpr KDColor BannerView::k_backgroundColor;
-
 BannerView::BannerView(
   Responder * parentResponder,
   InputEventHandlerDelegate * inputEventHandlerDelegate,
   TextFieldDelegate * textFieldDelegate
 ) :
   Shared::XYBannerView(parentResponder, inputEventHandlerDelegate, textFieldDelegate),
-  m_dotNameView(k_font, 0.0f, 0.5f, k_textColor, k_backgroundColor),
-  m_regressionTypeView(k_font, (I18n::Message)0, 0.0f, 0.5f, k_textColor,k_backgroundColor),
-  m_subText0(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText1(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText2(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText3(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor),
-  m_subText4(k_font, 0.5f, 0.5f, k_textColor, k_backgroundColor)
+  m_dotNameView(Font(), 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_regressionTypeView(Font(), (I18n::Message)0, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_subText0(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_subText1(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_subText2(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_subText3(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_subText4(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor())
 {
 }
 
diff --git a/apps/regression/banner_view.h b/apps/regression/banner_view.h
index b6cf1292d..f539215ea 100644
--- a/apps/regression/banner_view.h
+++ b/apps/regression/banner_view.h
@@ -16,11 +16,7 @@ public:
   MessageTextView * regressionTypeView() { return &m_regressionTypeView; }
   BufferTextView * subTextAtIndex(int index);
   static constexpr int numberOfsubTexts() { return 5; }
-  const KDFont * font() const { return k_font; }
 private:
-  static constexpr const KDFont * k_font = KDFont::SmallFont;
-  static constexpr KDColor k_textColor = KDColorBlack;
-  static constexpr KDColor k_backgroundColor = Palette::GreyMiddle;
   static constexpr int k_numberOfSubviews = Shared::XYBannerView::k_numberOfSubviews + 7;
   int numberOfSubviews() const override { return k_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index 46d6b5e1d..c785cbe36 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -175,7 +175,7 @@ void GraphController::reloadBannerView() {
   }
   if (!coefficientsAreDefined) {
     // Force the "Data not suitable" message to be on the next line
-    int numberOfCharToCompleteLine = maxInt(Ion::Display::Width/(m_bannerView.font()->glyphSize().width())- strlen(I18n::translate(formula)), 0);
+    int numberOfCharToCompleteLine = maxInt(Ion::Display::Width / BannerView::Font()->glyphSize().width() - strlen(I18n::translate(formula)), 0);
     numberOfChar = 0;
     for (int i = 0; i < numberOfCharToCompleteLine-1; i++) {
       buffer[numberOfChar++] = ' ';
diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index 3ca4e8dd8..b99389d9d 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -4,15 +4,15 @@
 namespace Shared {
 
 KDCoordinate BannerView::HeightGivenNumberOfLines(int linesCount) {
-  return LineSpacing + (KDFont::SmallFont->glyphSize().height() + LineSpacing) * linesCount;
+  return LineSpacing + (Font()->glyphSize().height() + LineSpacing) * linesCount;
 }
 
 void BannerView::drawRect(KDContext * ctx, KDRect rect) const {
   const KDCoordinate frameHeight = minimalSizeForOptimalDisplay().height();
-  const KDCoordinate lineHeight = KDFont::SmallFont->glyphSize().height() + LineSpacing;
+  const KDCoordinate lineHeight = Font()->glyphSize().height() + LineSpacing;
   const KDCoordinate lineWidth = m_frame.width();
   for (KDCoordinate y = 0; y < frameHeight; y += lineHeight) {
-    ctx->fillRect(KDRect(0, y, lineWidth, LineSpacing), Palette::GreyMiddle);
+    ctx->fillRect(KDRect(0, y, lineWidth, LineSpacing), BackgroundColor());
   }
 }
 
diff --git a/apps/shared/banner_view.h b/apps/shared/banner_view.h
index eb33b6563..4bcf14f94 100644
--- a/apps/shared/banner_view.h
+++ b/apps/shared/banner_view.h
@@ -11,6 +11,9 @@ public:
   void drawRect(KDContext * ctx, KDRect rect) const override;
   KDSize minimalSizeForOptimalDisplay() const override;
   void reload() { layoutSubviews(); }
+  static constexpr const KDFont * Font() { return KDFont::SmallFont; }
+  static constexpr KDColor TextColor() { return KDColorBlack; }
+  static constexpr KDColor BackgroundColor() { return Palette::GreyMiddle; }
 private:
   static constexpr KDCoordinate LineSpacing = 2;
   int numberOfSubviews() const override = 0;
diff --git a/apps/shared/xy_banner_view.cpp b/apps/shared/xy_banner_view.cpp
index 39719f57d..02691fc3f 100644
--- a/apps/shared/xy_banner_view.cpp
+++ b/apps/shared/xy_banner_view.cpp
@@ -8,8 +8,8 @@ XYBannerView::XYBannerView(
   InputEventHandlerDelegate * inputEventHandlerDelegate,
   TextFieldDelegate * textFieldDelegate
 ) :
-  m_abscissaView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_ordinateView(KDFont::SmallFont, 0.5f, 0.5f, KDColorBlack, Palette::GreyMiddle)
+  m_abscissaView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_ordinateView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor())
 {
 }
 
diff --git a/apps/statistics/box_banner_view.cpp b/apps/statistics/box_banner_view.cpp
index 0dc664892..ea09d22da 100644
--- a/apps/statistics/box_banner_view.cpp
+++ b/apps/statistics/box_banner_view.cpp
@@ -4,9 +4,9 @@
 namespace Statistics {
 
 BoxBannerView::BoxBannerView() :
-  m_seriesName(KDFont::SmallFont, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_calculationName(KDFont::SmallFont, I18n::Message::Minimum, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_calculationValue(KDFont::SmallFont, 1.0f, 0.5f, KDColorBlack, Palette::GreyMiddle)
+  m_seriesName(Font(), 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_calculationName(Font(), I18n::Message::Minimum, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_calculationValue(Font(), 1.0f, 0.5f, TextColor(), BackgroundColor())
 {
 }
 
diff --git a/apps/statistics/histogram_banner_view.cpp b/apps/statistics/histogram_banner_view.cpp
index 6609d8e09..f4575c6f2 100644
--- a/apps/statistics/histogram_banner_view.cpp
+++ b/apps/statistics/histogram_banner_view.cpp
@@ -5,12 +5,12 @@
 namespace Statistics {
 
 HistogramBannerView::HistogramBannerView() :
-  m_intervalLegendView(KDFont::SmallFont, I18n::Message::Interval, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_intervalView(KDFont::SmallFont, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_sizeLegendView(KDFont::SmallFont, I18n::Message::Size, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_sizeView(KDFont::SmallFont, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_frequencyLegendView(KDFont::SmallFont, I18n::Message::Frequency, 1.0f, 0.5f, KDColorBlack, Palette::GreyMiddle),
-  m_frequencyView(KDFont::SmallFont, 0.0f, 0.5f, KDColorBlack, Palette::GreyMiddle)
+  m_intervalLegendView(Font(), I18n::Message::Interval, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_intervalView(Font(), 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_sizeLegendView(Font(), I18n::Message::Size, 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_sizeView(Font(), 0.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_frequencyLegendView(Font(), I18n::Message::Frequency, 1.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_frequencyView(Font(), 0.0f, 0.5f, TextColor(), BackgroundColor())
 {
 }
 

From 633dfaf04331826a6daafd74ba062f2311584c43 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 28 Feb 2019 17:30:26 +0100
Subject: [PATCH 268/295] [apps/graph] Replace magic numbers

---
 apps/graph/graph/banner_view.h                     | 1 +
 apps/graph/graph/calculation_graph_controller.cpp  | 2 +-
 apps/graph/graph/graph_controller.cpp              | 2 +-
 apps/graph/graph/intersection_graph_controller.cpp | 3 +--
 apps/graph/graph/tangent_graph_controller.cpp      | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/apps/graph/graph/banner_view.h b/apps/graph/graph/banner_view.h
index 8f8989b26..d53702c2a 100644
--- a/apps/graph/graph/banner_view.h
+++ b/apps/graph/graph/banner_view.h
@@ -16,6 +16,7 @@ public:
   BufferTextView * aView() { return &m_aView; }
   BufferTextView * bView() { return &m_bView; }
   void setNumberOfSubviews(int numberOfSubviews) { m_numberOfSubviews = numberOfSubviews; }
+  static constexpr int k_numberOfSubviews = Shared::XYBannerView::k_numberOfSubviews + 4;
 private:
   int numberOfSubviews() const override { return m_numberOfSubviews; }
   View * subviewAtIndex(int index) override;
diff --git a/apps/graph/graph/calculation_graph_controller.cpp b/apps/graph/graph/calculation_graph_controller.cpp
index 847bbc8b9..e72b21167 100644
--- a/apps/graph/graph/calculation_graph_controller.cpp
+++ b/apps/graph/graph/calculation_graph_controller.cpp
@@ -28,6 +28,7 @@ void CalculationGraphController::viewWillAppear() {
     m_isActive = true;
     m_cursor->moveTo(pointOfInterest.abscissa, pointOfInterest.value);
     m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+    m_bannerView->setNumberOfSubviews(Shared::XYBannerView::k_numberOfSubviews);
     reloadBannerView();
   }
   m_graphView->setOkView(nullptr);
@@ -40,7 +41,6 @@ void CalculationGraphController::setRecord(Ion::Storage::Record record) {
 }
 
 void CalculationGraphController::reloadBannerView() {
-  m_bannerView->setNumberOfSubviews(2);
   reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), CartesianFunction::Symbol());
 }
 
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index c544b235b..23e5e2e23 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -28,6 +28,7 @@ I18n::Message GraphController::emptyMessage() {
 void GraphController::viewWillAppear() {
   m_view.drawTangent(false);
   m_view.setCursorView(&m_cursorView);
+  m_bannerView.setNumberOfSubviews(Shared::XYBannerView::k_numberOfSubviews + m_displayDerivativeInBanner);
   FunctionGraphController::viewWillAppear();
   selectFunctionWithCursor(indexFunctionSelectedByCursor()); // update the color of the cursor
 }
@@ -69,7 +70,6 @@ BannerView * GraphController::bannerView() {
 
 void GraphController::reloadBannerView() {
   FunctionGraphController::reloadBannerView();
-  m_bannerView.setNumberOfSubviews(2+m_displayDerivativeInBanner);
   if (functionStore()->numberOfActiveFunctions() == 0 || !m_displayDerivativeInBanner) {
     return;
   }
diff --git a/apps/graph/graph/intersection_graph_controller.cpp b/apps/graph/graph/intersection_graph_controller.cpp
index 1994430b8..074944f4a 100644
--- a/apps/graph/graph/intersection_graph_controller.cpp
+++ b/apps/graph/graph/intersection_graph_controller.cpp
@@ -17,8 +17,7 @@ const char * IntersectionGraphController::title() {
 }
 
 void IntersectionGraphController::reloadBannerView() {
-  m_bannerView->setNumberOfSubviews(2);
-  reloadBannerViewForCursorOnFunction(m_cursor, m_record, functionStore(), CartesianFunction::Symbol());
+  CalculationGraphController::reloadBannerView();
   constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index ed93596f8..fe0280cde 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -25,6 +25,7 @@ void TangentGraphController::viewWillAppear() {
   m_graphView->drawTangent(true);
   m_graphView->setOkView(nullptr);
   m_graphView->selectMainView(true);
+  m_bannerView->setNumberOfSubviews(BannerView::k_numberOfSubviews);
   reloadBannerView();
   m_graphView->reload();
 }
@@ -35,7 +36,6 @@ void TangentGraphController::setRecord(Ion::Storage::Record record) {
 }
 
 void TangentGraphController::reloadBannerView() {
-  m_bannerView->setNumberOfSubviews(6);
   if (m_record.isNull()) {
     return;
   }

From 3d7139794923335fe205c3a08de8dce599e27705 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Mon, 4 Mar 2019 14:40:45 +0100
Subject: [PATCH 269/295] [apps/shared] XYBannerView contains a TextField

---
 apps/regression/graph_controller.cpp     |  8 ++++----
 apps/shared/function_banner_delegate.cpp | 21 +++++++++------------
 apps/shared/xy_banner_view.cpp           | 18 ++++++++++++++++--
 apps/shared/xy_banner_view.h             |  9 ++++++---
 4 files changed, 35 insertions(+), 21 deletions(-)

diff --git a/apps/regression/graph_controller.cpp b/apps/regression/graph_controller.cpp
index c785cbe36..5cec51cc2 100644
--- a/apps/regression/graph_controller.cpp
+++ b/apps/regression/graph_controller.cpp
@@ -124,7 +124,6 @@ void GraphController::reloadBannerView() {
   m_bannerView.dotNameView()->setText(buffer);
 
   // Set "x=..." or "xmean=..."
-  numberOfChar = 0;
   legend = "x=";
   double x = m_cursor->x();
   // Display a specific legend if the mean dot is selected
@@ -133,14 +132,15 @@ void GraphController::reloadBannerView() {
     legend = "x\xCC\x85=";
     x = m_store->meanOfColumn(*m_selectedSeriesIndex, 0);
   }
-  numberOfChar += strlcpy(buffer, legend, bufferSize);
-  numberOfChar += PoincareHelpers::ConvertFloatToText<double>(x, buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
+  m_bannerView.abscissaSymbol()->setText(legend);
+
+  numberOfChar = PoincareHelpers::ConvertFloatToText<double>(x, buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
   assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
   for (int i = numberOfChar; i < k_maxLegendLength; i++) {
     buffer[numberOfChar++] = ' ';
   }
   buffer[k_maxLegendLength] = 0;
-  m_bannerView.abscissaView()->setText(buffer);
+  m_bannerView.abscissaValue()->setText(buffer);
 
   // Set "y=..." or "ymean=..."
   numberOfChar = 0;
diff --git a/apps/shared/function_banner_delegate.cpp b/apps/shared/function_banner_delegate.cpp
index 3d8b5968d..5d81fc629 100644
--- a/apps/shared/function_banner_delegate.cpp
+++ b/apps/shared/function_banner_delegate.cpp
@@ -11,20 +11,17 @@ void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor
   constexpr int bufferSize = k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits);
   char buffer[bufferSize];
   const char * space = " ";
-  const char * legend = "0=";
-  int legendLength = strlen(legend);
   int numberOfChar = 0;
-  strlcpy(buffer, legend, bufferSize);
-  numberOfChar += legendLength;
-  buffer[0] = symbol;
-  numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
-  strlcpy(buffer+numberOfChar, space, bufferSize - numberOfChar);
-  bannerView()->abscissaView()->setText(buffer);
+  buffer[numberOfChar++] = symbol;
+  strlcpy(buffer + numberOfChar, "=", bufferSize - numberOfChar);
+  bannerView()->abscissaSymbol()->setText(buffer);
 
-  numberOfChar = 0;
-  numberOfChar += function->nameWithArgument(buffer, bufferSize, symbol);
-  legend = "=";
-  numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
+  numberOfChar = PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
+  strlcpy(buffer+numberOfChar, space, bufferSize - numberOfChar);
+  bannerView()->abscissaValue()->setText(buffer);
+
+  numberOfChar = function->nameWithArgument(buffer, bufferSize, symbol);
+  numberOfChar += strlcpy(buffer+numberOfChar, "=", bufferSize-numberOfChar);
   numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->y(), buffer+numberOfChar, bufferSize-numberOfChar, Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
   bannerView()->ordinateView()->setText(buffer);
diff --git a/apps/shared/xy_banner_view.cpp b/apps/shared/xy_banner_view.cpp
index 02691fc3f..e8847cc52 100644
--- a/apps/shared/xy_banner_view.cpp
+++ b/apps/shared/xy_banner_view.cpp
@@ -8,14 +8,28 @@ XYBannerView::XYBannerView(
   InputEventHandlerDelegate * inputEventHandlerDelegate,
   TextFieldDelegate * textFieldDelegate
 ) :
-  m_abscissaView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor()),
+  m_abscissaSymbol(Font(), 1.0f, 0.5f, TextColor(), BackgroundColor()),
+  m_abscissaValue(
+    parentResponder,
+    m_draftTextBuffer,
+    m_draftTextBuffer,
+    TextField::maxBufferSize(),
+    inputEventHandlerDelegate,
+    textFieldDelegate,
+    false,
+    Font(),
+    0.0f, 0.5f,
+    TextColor(),
+    BackgroundColor()
+  ),
   m_ordinateView(Font(), 0.5f, 0.5f, TextColor(), BackgroundColor())
 {
+  m_draftTextBuffer[0] = 0;
 }
 
 View * XYBannerView::subviewAtIndex(int index) {
   assert(0 <= index && index < numberOfSubviews());
-  View * subviews[] = {&m_abscissaView, &m_ordinateView};
+  View * subviews[] = {&m_abscissaSymbol, &m_abscissaValue, &m_ordinateView};
   return subviews[index];
 }
 
diff --git a/apps/shared/xy_banner_view.h b/apps/shared/xy_banner_view.h
index 0fea43767..80ec5ffba 100644
--- a/apps/shared/xy_banner_view.h
+++ b/apps/shared/xy_banner_view.h
@@ -12,15 +12,18 @@ public:
     InputEventHandlerDelegate * inputEventHandlerDelegate,
     TextFieldDelegate * textFieldDelegate
   );
-  BufferTextView * abscissaView() { return &m_abscissaView; }
+  BufferTextView * abscissaSymbol() { return &m_abscissaSymbol; }
+  TextField * abscissaValue() { return &m_abscissaValue; }
   BufferTextView * ordinateView() { return &m_ordinateView; }
-  static constexpr int k_numberOfSubviews = 2;
+  static constexpr int k_numberOfSubviews = 3;
 protected:
   View * subviewAtIndex(int index) override;
 private:
   int numberOfSubviews() const override { return k_numberOfSubviews; }
-  BufferTextView m_abscissaView;
+  BufferTextView m_abscissaSymbol;
+  TextField m_abscissaValue;
   BufferTextView m_ordinateView;
+  char m_draftTextBuffer[TextField::maxBufferSize()];
 };
 
 }

From 0f98face6aced194397a077276b6fb26d20fd394 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Mon, 25 Mar 2019 15:38:10 +0100
Subject: [PATCH 270/295] [apps] Define
 InteractiveCurveViewController::selectedCurveIndex

---
 apps/regression/graph_controller.h              | 1 +
 apps/shared/function_graph_controller.h         | 1 +
 apps/shared/interactive_curve_view_controller.h | 5 +++--
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/apps/regression/graph_controller.h b/apps/regression/graph_controller.h
index 49bc1076e..48a162873 100644
--- a/apps/regression/graph_controller.h
+++ b/apps/regression/graph_controller.h
@@ -44,6 +44,7 @@ private:
   void initCursorParameters() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
+  int selectedCurveIndex() const override { return *m_selectedSeriesIndex; }
   bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
   double yValue(int curveIndex, double x, Poincare::Context * context) const override;
   bool suitableYValue(double y) const override;
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index bf43ca2df..ac7114ff2 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -40,6 +40,7 @@ private:
   CurveView * curveView() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
+  int selectedCurveIndex() const override { return *m_indexFunctionSelectedByCursor; }
   bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
   double yValue(int curveIndex, double x, Poincare::Context * context) const override;
   int numberOfCurves() const override;
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 6ff234718..08a2e34ad 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -40,8 +40,9 @@ protected:
 
   // Closest vertical curve helper
   int closestCurveIndexVertically(bool goingUp, int currentSelectedCurve, Poincare::Context * context) const;
-  virtual bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const { assert(false); return false; }
-  virtual double yValue(int curveIndex, double x, Poincare::Context * context) const { assert(false); return 0; }
+  virtual bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const = 0;
+  virtual int selectedCurveIndex() const = 0;
+  virtual double yValue(int curveIndex, double x, Poincare::Context * context) const = 0;
   virtual bool suitableYValue(double y) const { return true; }
   virtual int numberOfCurves() const = 0;
 

From 0e1c1a017d7a520c6d23b172a9ba20962d121843 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Mon, 4 Mar 2019 14:43:33 +0100
Subject: [PATCH 271/295] [apps] Implement TextFieldDelegate methods in
 GraphControllers

---
 apps/graph/graph/tangent_graph_controller.cpp | 23 +++++++++++++++++++
 apps/graph/graph/tangent_graph_controller.h   |  2 ++
 apps/sequence/graph/graph_controller.cpp      | 14 +++++++++++
 apps/sequence/graph/graph_controller.h        |  1 +
 apps/shared/function_graph_controller.cpp     | 10 ++++++++
 apps/shared/function_graph_controller.h       | 11 +++++----
 .../interactive_curve_view_controller.cpp     | 20 ++++++++++++++++
 .../interactive_curve_view_controller.h       |  2 ++
 ...mple_interactive_curve_view_controller.cpp | 12 ++++++++++
 ...simple_interactive_curve_view_controller.h |  2 ++
 apps/shared/sum_graph_controller.cpp          | 12 ----------
 apps/shared/sum_graph_controller.h            |  2 --
 12 files changed, 93 insertions(+), 18 deletions(-)

diff --git a/apps/graph/graph/tangent_graph_controller.cpp b/apps/graph/graph/tangent_graph_controller.cpp
index fe0280cde..5f11be357 100644
--- a/apps/graph/graph/tangent_graph_controller.cpp
+++ b/apps/graph/graph/tangent_graph_controller.cpp
@@ -30,6 +30,29 @@ void TangentGraphController::viewWillAppear() {
   m_graphView->reload();
 }
 
+void TangentGraphController::didBecomeFirstResponder() {
+  if (curveView()->isMainViewSelected()) {
+    m_bannerView->abscissaValue()->setParentResponder(this);
+    m_bannerView->abscissaValue()->setDelegates(textFieldDelegateApp(), this);
+    app()->setFirstResponder(m_bannerView->abscissaValue());
+  }
+}
+
+bool TangentGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
+    return false;
+  }
+  App * myApp = static_cast<App *>(app());
+  ExpiringPointer<CartesianFunction> function = myApp->functionStore()->modelForRecord(m_record);
+  double y = function->evaluateAtAbscissa(floatBody, textFieldDelegateApp()->localContext());
+  m_cursor->moveTo(floatBody, y);
+  interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+  reloadBannerView();
+  curveView()->reload();
+  return true;
+}
+
 void TangentGraphController::setRecord(Ion::Storage::Record record) {
   m_graphView->selectRecord(record);
   m_record = record;
diff --git a/apps/graph/graph/tangent_graph_controller.h b/apps/graph/graph/tangent_graph_controller.h
index 2a04f4e99..e09fbacb0 100644
--- a/apps/graph/graph/tangent_graph_controller.h
+++ b/apps/graph/graph/tangent_graph_controller.h
@@ -15,6 +15,8 @@ public:
   TangentGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, Shared::CurveViewCursor * cursor);
   const char * title() override;
   void viewWillAppear() override;
+  void didBecomeFirstResponder() override;
+  bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
   void setRecord(Ion::Storage::Record record);
 private:
   float cursorBottomMarginRatio() override { return 0.22f; }
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index a104d2abf..558a83b6b 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -59,6 +59,20 @@ float GraphController::interestingXHalfRange() const {
   return nmax - nmin;
 }
 
+bool GraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
+    return false;
+  }
+  floatBody = std::round(floatBody);
+  double y = yValue(selectedCurveIndex(), floatBody, textFieldDelegateApp()->localContext());
+  m_cursor->moveTo(floatBody, y);
+  interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+  reloadBannerView();
+  m_view.reload();
+  return true;
+}
+
 bool GraphController::handleEnter() {
   Ion::Storage::Record record = functionStore()->activeRecordAtIndex(indexFunctionSelectedByCursor());
   m_termSumController.setRecord(record);
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index c50e2da71..d9230c1d8 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -21,6 +21,7 @@ public:
   // InteractiveCurveViewRangeDelegate
   float interestingXMin() const override;
   float interestingXHalfRange() const override;
+  bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
 private:
   Shared::XYBannerView * bannerView() override { return &m_bannerView; }
   bool handleEnter() override;
diff --git a/apps/shared/function_graph_controller.cpp b/apps/shared/function_graph_controller.cpp
index 361017c7e..4a272e247 100644
--- a/apps/shared/function_graph_controller.cpp
+++ b/apps/shared/function_graph_controller.cpp
@@ -27,6 +27,16 @@ ViewController * FunctionGraphController::initialisationParameterController() {
   return &m_initialisationParameterController;
 }
 
+void FunctionGraphController::didBecomeFirstResponder() {
+  if (curveView()->isMainViewSelected()) {
+    bannerView()->abscissaValue()->setParentResponder(this);
+    bannerView()->abscissaValue()->setDelegates(textFieldDelegateApp(), this);
+    app()->setFirstResponder(bannerView()->abscissaValue());
+  } else {
+    InteractiveCurveViewController::didBecomeFirstResponder();
+  }
+}
+
 void FunctionGraphController::viewWillAppear() {
   functionGraphView()->setBannerView(bannerView());
   functionGraphView()->setAreaHighlight(NAN,NAN);
diff --git a/apps/shared/function_graph_controller.h b/apps/shared/function_graph_controller.h
index ac7114ff2..6f2eb565d 100644
--- a/apps/shared/function_graph_controller.h
+++ b/apps/shared/function_graph_controller.h
@@ -16,6 +16,7 @@ public:
   FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header,  InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion);
   bool isEmpty() const override;
   ViewController * initialisationParameterController() override;
+  void didBecomeFirstResponder() override;
   void viewWillAppear() override;
 
 protected:
@@ -27,6 +28,12 @@ protected:
   virtual double defaultCursorAbscissa();
   virtual FunctionStore * functionStore() const;
 
+  // Closest vertical curve helper
+  bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
+  int selectedCurveIndex() const override { return *m_indexFunctionSelectedByCursor; }
+  double yValue(int curveIndex, double x, Poincare::Context * context) const override;
+  int numberOfCurves() const override;
+
 private:
   virtual FunctionGraphView * functionGraphView() = 0;
   virtual FunctionCurveParameterController * curveParameterController() = 0;
@@ -40,10 +47,6 @@ private:
   CurveView * curveView() override;
   uint32_t modelVersion() override;
   uint32_t rangeVersion() override;
-  int selectedCurveIndex() const override { return *m_indexFunctionSelectedByCursor; }
-  bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
-  double yValue(int curveIndex, double x, Poincare::Context * context) const override;
-  int numberOfCurves() const override;
 
   InitialisationParameterController m_initialisationParameterController;
   Poincare::Preferences::AngleUnit * m_angleUnitVersion;
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 08a4f1687..4d3b98409 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -182,6 +182,26 @@ void InteractiveCurveViewController::willExitResponderChain(Responder * nextFirs
   }
 }
 
+bool InteractiveCurveViewController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
+    return false;
+  }
+  double y = yValue(selectedCurveIndex(), floatBody, textFieldDelegateApp()->localContext());
+  m_cursor->moveTo(floatBody, y);
+  interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);
+  reloadBannerView();
+  curveView()->reload();
+  return true;
+}
+
+bool InteractiveCurveViewController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
+  if ((event == Ion::Events::Plus || event == Ion::Events::Minus) && !textField->isEditing()) {
+    return handleEvent(event);
+  }
+  return SimpleInteractiveCurveViewController::textFieldDidReceiveEvent(textField, event);
+}
+
 Responder * InteractiveCurveViewController::tabController() const{
   return (stackController()->parentResponder());
 }
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 08a2e34ad..105eb2520 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -29,6 +29,8 @@ public:
   void viewWillAppear() override;
   void viewDidDisappear() override;
   void willExitResponderChain(Responder * nextFirstResponder) override;
+  bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
+  bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
 protected:
   Responder * tabController() const;
   virtual StackViewController * stackController() const;
diff --git a/apps/shared/simple_interactive_curve_view_controller.cpp b/apps/shared/simple_interactive_curve_view_controller.cpp
index b2cacd88d..193615ae4 100644
--- a/apps/shared/simple_interactive_curve_view_controller.cpp
+++ b/apps/shared/simple_interactive_curve_view_controller.cpp
@@ -29,6 +29,18 @@ bool SimpleInteractiveCurveViewController::handleEvent(Ion::Events::Event event)
   return false;
 }
 
+bool SimpleInteractiveCurveViewController::textFieldDidAbortEditing(TextField * textField) {
+  reloadBannerView();
+  return true;
+}
+
+bool SimpleInteractiveCurveViewController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
+  if ((event == Ion::Events::OK || event == Ion::Events::EXE) && !textField->isEditing()) {
+    return handleEnter();
+  }
+  return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
+}
+
 bool SimpleInteractiveCurveViewController::handleZoom(Ion::Events::Event event) {
   float ratio = event == Ion::Events::Plus ? 2.0f/3.0f : 3.0f/2.0f;
   interactiveCurveViewRange()->zoom(ratio, m_cursor->x(), m_cursor->y());
diff --git a/apps/shared/simple_interactive_curve_view_controller.h b/apps/shared/simple_interactive_curve_view_controller.h
index 7a71c100b..b18f468b2 100644
--- a/apps/shared/simple_interactive_curve_view_controller.h
+++ b/apps/shared/simple_interactive_curve_view_controller.h
@@ -17,6 +17,8 @@ public:
   SimpleInteractiveCurveViewController(Responder * parentResponder, CurveViewCursor * cursor);
   View * view() override;
   bool handleEvent(Ion::Events::Event event) override;
+  bool textFieldDidAbortEditing(TextField * textField) override;
+  bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
 protected:
   TextFieldDelegateApp * textFieldDelegateApp() override {
     return static_cast<TextFieldDelegateApp *>(app());
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 21e6dc03d..1c4f5b8e5 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -102,18 +102,6 @@ bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const
   return handleEnter();
 }
 
-bool SumGraphController::textFieldDidAbortEditing(TextField * textField) {
-  m_legendView.setEditableZone(m_cursor->x());
-  return true;
-}
-
-bool SumGraphController::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
-  if ((event == Ion::Events::OK || event == Ion::Events::EXE) && !textField->isEditing()) {
-    return handleEnter();
-  }
-  return TextFieldDelegate::textFieldDidReceiveEvent(textField, event);
-}
-
 bool SumGraphController::handleLeftRightEvent(Ion::Events::Event event) {
   if (m_step == Step::Result) {
     return false;
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index baaa10595..791c7f572 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -19,8 +19,6 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
   void setRecord(Ion::Storage::Record record);
   bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
-  bool textFieldDidAbortEditing(TextField * textField) override;
-  bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
 protected:
   virtual bool moveCursorHorizontallyToPosition(double position);
   enum class Step {

From e53b0e6bba8ae3242f31363837c4216fca258a82 Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Wed, 27 Mar 2019 17:28:20 +0100
Subject: [PATCH 272/295] [apps/shared] Clean CurveViewCursor coordinate
 getters

---
 apps/shared/curve_view_cursor.cpp | 8 --------
 apps/shared/curve_view_cursor.h   | 4 ++--
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/apps/shared/curve_view_cursor.cpp b/apps/shared/curve_view_cursor.cpp
index 8058acb88..7645da9cb 100644
--- a/apps/shared/curve_view_cursor.cpp
+++ b/apps/shared/curve_view_cursor.cpp
@@ -9,14 +9,6 @@ CurveViewCursor::CurveViewCursor() :
 {
 }
 
-double CurveViewCursor::x() {
-  return m_x;
-}
-
-double CurveViewCursor::y() {
-  return m_y;
-}
-
 void CurveViewCursor::moveTo(double x, double y) {
   m_x = clipped(x, false);
   m_y = clipped(y, true);
diff --git a/apps/shared/curve_view_cursor.h b/apps/shared/curve_view_cursor.h
index 4f8d2d92f..ea013e19e 100644
--- a/apps/shared/curve_view_cursor.h
+++ b/apps/shared/curve_view_cursor.h
@@ -6,8 +6,8 @@ namespace Shared {
 class CurveViewCursor {
 public:
   CurveViewCursor();
-  double x();
-  double y();
+  double x() const { return m_x; }
+  double y() const { return m_y; }
   void moveTo(double x, double y);
 private:
   static double clipped(double f, bool canBeInfinite);

From d97d5d40f5bf5cb75a950133379f04120f5b6800 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 12:30:51 +0200
Subject: [PATCH 273/295] [apps/cartesian_function] Fix derivative name display

Scenario: f(x) = x, go to the Values tab of the Graph app, display the
derivative, there is a roblem with UTF8
---
 apps/shared/cartesian_function.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/shared/cartesian_function.cpp b/apps/shared/cartesian_function.cpp
index b6d304e61..6de019f85 100644
--- a/apps/shared/cartesian_function.cpp
+++ b/apps/shared/cartesian_function.cpp
@@ -74,7 +74,7 @@ int CartesianFunction::derivativeNameWithArgument(char * buffer, size_t bufferSi
   if (!UTF8Helper::CodePointIs(firstParenthesis, '(')) {
     return numberOfChars;
   }
-  memmove(firstParenthesis + derivativeSize, firstParenthesis, buffer + numberOfChars - firstParenthesis);
+  memmove(firstParenthesis + derivativeSize, firstParenthesis, numberOfChars - (firstParenthesis - buffer) + 1);
   UTF8Decoder::CodePointToChars('\'', firstParenthesis, derivativeSize);
   return numberOfChars + derivativeSize;
 }

From 5316372d7286582036f667d6b2b642770a7cae35 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 14:13:43 +0200
Subject: [PATCH 274/295] [escher/text_field] When fetching XNT code point,
 text is draftText

---
 escher/src/text_field.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 6b87cb0d5..e951addd8 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -359,10 +359,11 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
   /* Let's assume everything before the cursor is nested correctly, which is
    * reasonable if the expression is being entered left-to-right. */
   const char * text = this->text();
+  assert(text == m_contentView.draftTextBuffer());
   const char * location = cursorLocation();
-  UTF8Decoder decoder(text, text + (location - m_contentView.draftTextBuffer()));
+  UTF8Decoder decoder(text, location);
   unsigned level = 0;
-  while (location > m_contentView.draftTextBuffer()) {
+  while (location > text) {
     CodePoint c = decoder.previousCodePoint();
     location = decoder.stringPosition();
     switch (c) {
@@ -373,14 +374,14 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
           break;
         }
         // Skip over whitespace.
-        while (location > m_contentView.draftTextBuffer() && decoder.previousCodePoint() == ' ') {
+        while (location > text && decoder.previousCodePoint() == ' ') {
           location = decoder.stringPosition();
         }
         // We found the next innermost function we are currently in.
         for (size_t i = 0; i < sizeof(sFunctions)/sizeof(sFunctions[0]); i++) {
           const char * name = sFunctions[i].name;
           size_t length = strlen(name);
-          if (location >= (m_contentView.draftTextBuffer() + length) && memcmp(&text[(location - m_contentView.draftTextBuffer()) - length], name, length) == 0) {
+          if ((location >= text + length) && memcmp(&text[(location - text) - length], name, length) == 0) {
             return sFunctions[i].xnt;
           }
         }

From a6cf1498da6466d37013e9808c1e4c0d259e2fd9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 14:14:47 +0200
Subject: [PATCH 275/295] [apps/text_field_delegate_app] default XNT() is 'x'

---
 apps/shared/text_field_delegate_app.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index b87a98b1b..d5193d067 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -15,7 +15,7 @@ Context * TextFieldDelegateApp::localContext() {
 }
 
 char TextFieldDelegateApp::XNT() {
-  return 'X';
+  return 'x';
 }
 
 bool TextFieldDelegateApp::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {

From a7d8160ee0142b80dc8c62062ead5515bde705da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 14:15:23 +0200
Subject: [PATCH 276/295] [escher/text_field] Add missing cursor location
 update

Fixes the scenario: go to statistics, press the root key, then the XNT
key -> crash
---
 escher/src/text_field.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index e951addd8..91fcaece3 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -377,6 +377,7 @@ CodePoint TextField::XNTCodePoint(CodePoint defaultXNTCodePoint) {
         while (location > text && decoder.previousCodePoint() == ' ') {
           location = decoder.stringPosition();
         }
+        location = decoder.stringPosition();
         // We found the next innermost function we are currently in.
         for (size_t i = 0; i < sizeof(sFunctions)/sizeof(sFunctions[0]); i++) {
           const char * name = sFunctions[i].name;

From 3168ec14c35b9cfe05637a38dfecdfa7bb2092aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 11:45:14 +0200
Subject: [PATCH 277/295] [calculation] HistoryViewCell: fix layoutSubviews to
 fix weird scrolling

When successively adding calculations 0.2 and int(x*exp(-4x), 0,99) the
reloadScroll would fail
---
 apps/calculation/history_view_cell.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index 204d3f6ec..f635a2270 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -129,7 +129,7 @@ void HistoryViewCell::layoutSubviews() {
     maxCoordinate(0, maxFrameWidth - outputSize.width()),
     inputSize.height(),
     minCoordinate(maxFrameWidth, outputSize.width()),
-    bounds().height() - inputSize.height()
+    outputSize.height()
   ));
 }
 

From a48bec14d2147f56cee153f91511679ae8965386 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 14:16:26 +0200
Subject: [PATCH 278/295] [calculation] Fix scroll on calculation heigher than
 the screen.

Changing the selectedSubviewType reloads the selection on the cell so we
need to scrollToSubviewOfTypeOfCellAtLocation afterwards.
---
 apps/calculation/history_view_cell.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/calculation/history_view_cell.cpp b/apps/calculation/history_view_cell.cpp
index f635a2270..f886a2674 100644
--- a/apps/calculation/history_view_cell.cpp
+++ b/apps/calculation/history_view_cell.cpp
@@ -180,9 +180,9 @@ bool HistoryViewCell::handleEvent(Ion::Events::Event event) {
   if ((event == Ion::Events::Down && m_dataSource->selectedSubviewType() == HistoryViewCellDataSource::SubviewType::Input) ||
     (event == Ion::Events::Up && m_dataSource->selectedSubviewType() == HistoryViewCellDataSource::SubviewType::Output)) {
     HistoryViewCellDataSource::SubviewType otherSubviewType = m_dataSource->selectedSubviewType() == HistoryViewCellDataSource::SubviewType::Input ? HistoryViewCellDataSource::SubviewType::Output : HistoryViewCellDataSource::SubviewType::Input;
+    m_dataSource->setSelectedSubviewType(otherSubviewType, this);
     CalculationSelectableTableView * tableView = (CalculationSelectableTableView *)parentResponder();
     tableView->scrollToSubviewOfTypeOfCellAtLocation(otherSubviewType, tableView->selectedColumn(), tableView->selectedRow());
-    m_dataSource->setSelectedSubviewType(otherSubviewType, this);
     app()->setFirstResponder(this);
     return true;
   }

From e9df8f77838252adf4edfa36b9771d159e6f3452 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 14:43:46 +0200
Subject: [PATCH 279/295] [poincare] MatrixIdentity: fix Indentity(+inf) to
 avoid crashing

---
 poincare/src/matrix_identity.cpp | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index ace409c44..7dab6e4ea 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -26,18 +26,10 @@ int MatrixIdentityNode::serialize(char * buffer, int bufferSize, Preferences::Pr
 template<typename T>
 Evaluation<T> MatrixIdentityNode::templatedApproximate(Context& context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const {
   Evaluation<T> input = childAtIndex(0)->approximate(T(), context, complexFormat, angleUnit);
-  // Check if the child is an integer
-  if (input.type() == EvaluationNode<T>::Type::Complex) {
-    // The child is a complex
-    std::complex<T> c = static_cast<Complex<T>&>(input).stdComplex();
-    T im = c.imag();
-    T re = c.real();
-    if ((im == 0.0 || std::isnan(im)) // The child is a real
-        && (!std::isnan(re) && re > 0) // The child is positive
-        && (std::ceil(re) ==  std::floor(re))) // The child is an integer
-    {
-      return MatrixComplex<T>::CreateIdentity((int)re);
-    }
+  T r = input.toScalar(); // Undefined if the child is not real
+  if (!std::isnan(r) && !std::isinf(r) && r > 0 // The child is defined and positive
+      && std::ceil(r) ==  std::floor(r)) { // The child is an integer
+    return MatrixComplex<T>::CreateIdentity((int)r);
   }
   return Complex<T>::Undefined();
 }

From 4d4adc5873c09c0f259a7b3f2756eb9f6a733a4e Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Thu, 2 May 2019 14:55:11 +0200
Subject: [PATCH 280/295] [apps/sequence/graph] Replace negative cursor
 abscissa by 0

---
 apps/sequence/graph/go_to_parameter_controller.cpp | 2 +-
 apps/sequence/graph/graph_controller.cpp           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/sequence/graph/go_to_parameter_controller.cpp b/apps/sequence/graph/go_to_parameter_controller.cpp
index 93d97f983..c4de2f23f 100644
--- a/apps/sequence/graph/go_to_parameter_controller.cpp
+++ b/apps/sequence/graph/go_to_parameter_controller.cpp
@@ -6,7 +6,7 @@ namespace Sequence {
 
 bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
   assert(parameterIndex == 0);
-  return Shared::FunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::round(f));
+  return Shared::FunctionGoToParameterController::setParameterAtIndex(parameterIndex, std::fmax(0, std::round(f)));
 }
 
 }
diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index 558a83b6b..4e10f4df0 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -64,7 +64,7 @@ bool GraphController::textFieldDidFinishEditing(TextField * textField, const cha
   if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
-  floatBody = std::round(floatBody);
+  floatBody = std::fmax(0, std::round(floatBody));
   double y = yValue(selectedCurveIndex(), floatBody, textFieldDelegateApp()->localContext());
   m_cursor->moveTo(floatBody, y);
   interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), cursorTopMarginRatio(), k_cursorRightMarginRatio, cursorBottomMarginRatio(), k_cursorLeftMarginRatio);

From 5daed629f7904a9d4c5da25d5648037debc78190 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 15:02:52 +0200
Subject: [PATCH 281/295] [poincare/layouts] Make default basic checks in
 isIdenticalTo

---
 poincare/include/poincare/code_point_layout.h |  2 +-
 poincare/include/poincare/empty_layout.h      |  2 +-
 poincare/include/poincare/layout_node.h       |  4 ++-
 poincare/include/poincare/nth_root_layout.h   |  2 +-
 .../include/poincare/vertical_offset_layout.h |  2 +-
 poincare/src/code_point_layout.cpp            | 14 +++++-----
 poincare/src/empty_layout.cpp                 | 14 +++++-----
 poincare/src/layout.cpp                       |  1 +
 poincare/src/layout_node.cpp                  | 26 +++++++++++++------
 poincare/src/nth_root_layout.cpp              | 14 +++++-----
 poincare/src/vertical_offset_layout.cpp       | 14 +++++-----
 11 files changed, 50 insertions(+), 45 deletions(-)

diff --git a/poincare/include/poincare/code_point_layout.h b/poincare/include/poincare/code_point_layout.h
index fd765bc93..d86fd1712 100644
--- a/poincare/include/poincare/code_point_layout.h
+++ b/poincare/include/poincare/code_point_layout.h
@@ -22,7 +22,6 @@ public:
 
   // Layout
   Type type() const override { return Type::CodePointLayout; }
-  bool isIdenticalTo(Layout l) override;
 
   // CodePointLayout
   CodePoint codePoint() const { return m_codePoint; }
@@ -63,6 +62,7 @@ protected:
 private:
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
   bool isMultiplicationCodePoint() const;
+  bool protectedIsIdenticalTo(Layout l) override;
   CodePoint m_codePoint;
   const KDFont * m_font;
 };
diff --git a/poincare/include/poincare/empty_layout.h b/poincare/include/poincare/empty_layout.h
index b3fe6a6d8..16aa8962b 100644
--- a/poincare/include/poincare/empty_layout.h
+++ b/poincare/include/poincare/empty_layout.h
@@ -15,7 +15,6 @@ public:
 
   // Layout
   Type type() const override { return Type::EmptyLayout; }
-  bool isIdenticalTo(Layout l) override;
 
   EmptyLayoutNode(Color color = Color::Yellow, bool visible = true, const KDFont * font = KDFont::LargeFont, bool margins = true) :
     LayoutNode(),
@@ -67,6 +66,7 @@ private:
   void moveCursorVertically(VerticalDirection direction, LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) override;
   bool willAddSibling(LayoutCursor * cursor, LayoutNode * sibling, bool moveCursor) override;
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
+  bool protectedIsIdenticalTo(Layout l) override;
 
   bool m_isVisible;
   Color m_color;
diff --git a/poincare/include/poincare/layout_node.h b/poincare/include/poincare/layout_node.h
index 297fa85d8..2786ec135 100644
--- a/poincare/include/poincare/layout_node.h
+++ b/poincare/include/poincare/layout_node.h
@@ -56,7 +56,7 @@ public:
   virtual Type type() const = 0;
 
   // Comparison
-  virtual bool isIdenticalTo(Layout l);
+  bool isIdenticalTo(Layout l);
 
   // Rendering
   void draw(KDContext * ctx, KDPoint p, KDColor expressionColor = KDColorBlack, KDColor backgroundColor = KDColorWhite);
@@ -141,6 +141,8 @@ public:
   virtual void didRemoveChildAtIndex(int index, LayoutCursor * cursor, bool force) {}
 
 protected:
+  virtual bool protectedIsIdenticalTo(Layout l);
+
   // Tree navigation
   virtual void moveCursorVertically(VerticalDirection direction, LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited);
 
diff --git a/poincare/include/poincare/nth_root_layout.h b/poincare/include/poincare/nth_root_layout.h
index 3b19fd2d0..9cd1bd835 100644
--- a/poincare/include/poincare/nth_root_layout.h
+++ b/poincare/include/poincare/nth_root_layout.h
@@ -21,7 +21,6 @@ public:
 
   // Layout
   Type type() const override { return Type::NthRootLayout; }
-  bool isIdenticalTo(Layout l) override;
 
   // LayoutNode
   void moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) override;
@@ -56,6 +55,7 @@ private:
   constexpr static KDCoordinate k_radixLineThickness = 1;
   KDSize adjustedIndexSize();
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
+  bool protectedIsIdenticalTo(Layout l) override;
   LayoutNode * radicandLayout() { return childAtIndex(0); }
   LayoutNode * indexLayout() { return m_hasIndex ? childAtIndex(1) : nullptr; }
   bool m_hasIndex;
diff --git a/poincare/include/poincare/vertical_offset_layout.h b/poincare/include/poincare/vertical_offset_layout.h
index b3ef24c5a..062dfb0ae 100644
--- a/poincare/include/poincare/vertical_offset_layout.h
+++ b/poincare/include/poincare/vertical_offset_layout.h
@@ -20,7 +20,6 @@ public:
 
   // Layout
   Type type() const override { return Type::VerticalOffsetLayout; }
-  bool isIdenticalTo(Layout l) override;
 
   // VerticalOffsetLayoutNode
   Position position() const { return m_position; }
@@ -54,6 +53,7 @@ private:
   constexpr static KDCoordinate k_separationMargin = 5;
   bool willAddSibling(LayoutCursor * cursor, LayoutNode * sibling, bool moveCursor) override;
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override {}
+  bool protectedIsIdenticalTo(Layout l) override;
   LayoutNode * indiceLayout() { return childAtIndex(0); }
   LayoutNode * baseLayout();
   Position m_position;
diff --git a/poincare/src/code_point_layout.cpp b/poincare/src/code_point_layout.cpp
index 38dd16b0e..4d08a014c 100644
--- a/poincare/src/code_point_layout.cpp
+++ b/poincare/src/code_point_layout.cpp
@@ -4,14 +4,6 @@
 
 namespace Poincare {
 
-bool CodePointLayoutNode::isIdenticalTo(Layout l) {
-  if (l.type() != Type::CodePointLayout) {
-    return false;
-  }
-  CodePointLayout & cpl = static_cast<CodePointLayout &>(l);
-  return codePoint() == cpl.codePoint() && font() == cpl.font();
-}
-
 // LayoutNode
 void CodePointLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->position() == LayoutCursor::Position::Right) {
@@ -106,6 +98,12 @@ bool CodePointLayoutNode::isMultiplicationCodePoint() const {
     || m_codePoint == UCodePointMiddleDot;
 }
 
+bool CodePointLayoutNode::protectedIsIdenticalTo(Layout l) {
+  assert(l.type() == Type::CodePointLayout);
+  CodePointLayout & cpl = static_cast<CodePointLayout &>(l);
+  return codePoint() == cpl.codePoint() && font() == cpl.font();
+}
+
 CodePointLayout CodePointLayout::Builder(CodePoint c, const KDFont * font) {
   void * bufferNode = TreePool::sharedPool()->alloc(sizeof(CodePointLayoutNode));
   CodePointLayoutNode * node = new (bufferNode) CodePointLayoutNode(c, font);
diff --git a/poincare/src/empty_layout.cpp b/poincare/src/empty_layout.cpp
index b9a02747f..b89329cbc 100644
--- a/poincare/src/empty_layout.cpp
+++ b/poincare/src/empty_layout.cpp
@@ -5,14 +5,6 @@
 
 namespace Poincare {
 
-bool EmptyLayoutNode::isIdenticalTo(Layout l) {
-  if (l.type() != Type::EmptyLayout) {
-    return false;
-  }
-  EmptyLayoutNode * n = static_cast<EmptyLayoutNode *>(l.node());
-  return color() == n->color();
-}
-
 void EmptyLayoutNode::deleteBeforeCursor(LayoutCursor * cursor) {
   cursor->setPosition(LayoutCursor::Position::Left);
   LayoutNode * p = parent();
@@ -102,6 +94,12 @@ void EmptyLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor
   }
 }
 
+bool EmptyLayoutNode::protectedIsIdenticalTo(Layout l) {
+  assert(l.type() == Type::EmptyLayout);
+  EmptyLayoutNode * n = static_cast<EmptyLayoutNode *>(l.node());
+  return color() == n->color();
+}
+
 EmptyLayout::EmptyLayout(const EmptyLayoutNode * n) : Layout(n) {}
 
 EmptyLayout EmptyLayout::Builder(EmptyLayoutNode::Color color, bool visible, const KDFont * font, bool margins) {
diff --git a/poincare/src/layout.cpp b/poincare/src/layout.cpp
index 333e0441a..610dc5bf1 100644
--- a/poincare/src/layout.cpp
+++ b/poincare/src/layout.cpp
@@ -7,6 +7,7 @@
 #include <poincare/layout_cursor.h>
 
 namespace Poincare {
+
 Layout Layout::clone() const {
   if (isUninitialized()) {
     return Layout();
diff --git a/poincare/src/layout_node.cpp b/poincare/src/layout_node.cpp
index 1132300fe..fa6341dda 100644
--- a/poincare/src/layout_node.cpp
+++ b/poincare/src/layout_node.cpp
@@ -8,16 +8,13 @@
 namespace Poincare {
 
 bool LayoutNode::isIdenticalTo(Layout l) {
-  if (l.isUninitialized() || type() != l.type() || numberOfChildren() != l.numberOfChildren()) {
+  if (l.isUninitialized() || type() != l.type()) {
     return false;
   }
-  for (int i = 0; i < numberOfChildren(); i++) {
-    Layout child = childAtIndex(i);
-    if (!childAtIndex(i)->isIdenticalTo(l.childAtIndex(i))) {
-      return false;
-    }
+  if (identifier() == l.identifier()) {
+    return true;
   }
-  return true;
+  return protectedIsIdenticalTo(l);
 }
 
 // Rendering
@@ -139,7 +136,20 @@ bool LayoutNode::canBeOmittedMultiplicationRightFactor() const {
   return isCollapsable(&numberOfOpenParentheses, false);
 }
 
-// Private
+// Protected and private
+
+bool LayoutNode::protectedIsIdenticalTo(Layout l) {
+  if (numberOfChildren() != l.numberOfChildren()) {
+    return false;
+  }
+  for (int i = 0; i < numberOfChildren(); i++) {
+    Layout child = childAtIndex(i);
+    if (!childAtIndex(i)->isIdenticalTo(l.childAtIndex(i))) {
+      return false;
+    }
+  }
+  return true;
+}
 
 void LayoutNode::moveCursorVertically(VerticalDirection direction, LayoutCursor * cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
   if (!equivalentPositionVisited) {
diff --git a/poincare/src/nth_root_layout.cpp b/poincare/src/nth_root_layout.cpp
index 62beeb8af..e0860d315 100644
--- a/poincare/src/nth_root_layout.cpp
+++ b/poincare/src/nth_root_layout.cpp
@@ -20,14 +20,6 @@ const uint8_t radixPixel[NthRootLayoutNode::k_leftRadixHeight][NthRootLayoutNode
   {0xFF, 0xFF, 0xFF, 0xFF, 0x00},
 };
 
-bool NthRootLayoutNode::isIdenticalTo(Layout l) {
-  if (l.type() != Type::NthRootLayout) {
-    return false;
-  }
-  NthRootLayout & nrl = static_cast<NthRootLayout &>(l);
-  return hasUpperLeftIndex() == nrl.node()->hasUpperLeftIndex() && LayoutNode::isIdenticalTo(l);
-}
-
 void NthRootLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == radicandLayout()
     && cursor->position() == LayoutCursor::Position::Left)
@@ -277,6 +269,12 @@ void NthRootLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionCol
   }
 }
 
+bool NthRootLayoutNode::protectedIsIdenticalTo(Layout l) {
+  assert(l.type() == Type::NthRootLayout);
+  NthRootLayout & nrl = static_cast<NthRootLayout &>(l);
+  return hasUpperLeftIndex() == nrl.node()->hasUpperLeftIndex() && LayoutNode::protectedIsIdenticalTo(l);
+}
+
 NthRootLayout NthRootLayout::Builder(Layout child) {
   void * bufferNode = TreePool::sharedPool()->alloc(sizeof(NthRootLayoutNode));
   NthRootLayoutNode * node = new (bufferNode) NthRootLayoutNode(false);
diff --git a/poincare/src/vertical_offset_layout.cpp b/poincare/src/vertical_offset_layout.cpp
index 4aaad5bc1..7121c14bc 100644
--- a/poincare/src/vertical_offset_layout.cpp
+++ b/poincare/src/vertical_offset_layout.cpp
@@ -8,14 +8,6 @@
 
 namespace Poincare {
 
-bool VerticalOffsetLayoutNode::isIdenticalTo(Layout l) {
-  if (l.type() != Type::VerticalOffsetLayout) {
-    return false;
-  }
-  VerticalOffsetLayoutNode * n = static_cast<VerticalOffsetLayoutNode *>(l.node());
-  return position() == n->position() && LayoutNode::isIdenticalTo(l);
-}
-
 void VerticalOffsetLayoutNode::moveCursorLeft(LayoutCursor * cursor, bool * shouldRecomputeLayout) {
   if (cursor->layoutNode() == indiceLayout()
       && cursor->position() == LayoutCursor::Position::Left)
@@ -273,6 +265,12 @@ LayoutNode * VerticalOffsetLayoutNode::baseLayout() {
   return parentNode->childAtIndex(idxInParent - 1);
 }
 
+bool VerticalOffsetLayoutNode::protectedIsIdenticalTo(Layout l) {
+  assert(l.type() == Type::VerticalOffsetLayout);
+  VerticalOffsetLayoutNode * n = static_cast<VerticalOffsetLayoutNode *>(l.node());
+  return position() == n->position() && LayoutNode::protectedIsIdenticalTo(l);
+}
+
 VerticalOffsetLayout VerticalOffsetLayout::Builder(Layout l, VerticalOffsetLayoutNode::Position position) {
   void * bufferNode = TreePool::sharedPool()->alloc(sizeof(VerticalOffsetLayoutNode));
   VerticalOffsetLayoutNode * node = new (bufferNode) VerticalOffsetLayoutNode(position);

From 204b9fe5cbdb93b77060eb6ba8d580f41fefbda8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 15:38:54 +0200
Subject: [PATCH 282/295] [poincare] Poincare::IsMatrix returns true for
 MatrixIdentity

---
 poincare/src/expression.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 3a0e65b85..876913d34 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -133,6 +133,7 @@ bool Expression::IsMatrix(const Expression e, Context & context, bool replaceSym
     || e.type() == ExpressionNode::Type::PredictionInterval
     || e.type() == ExpressionNode::Type::MatrixInverse
     || e.type() == ExpressionNode::Type::MatrixTranspose
+    || e.type() == ExpressionNode::Type::MatrixIdentity
     || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
         && replaceSymbols
         && SymbolAbstract::matches(

From 28133f378ed5dd90f702134c8aa080c2c1298c40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 16:07:24 +0200
Subject: [PATCH 283/295] [apps] Remove wrong withinTemporarySelection escape
 cases

Scenario:
Sequence app, add new sequence, go on its name, backspace: the cell on
the left of Add new sequence is selected, but it should not
---
 apps/code/menu_controller.cpp            | 2 +-
 apps/shared/function_list_controller.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/code/menu_controller.cpp b/apps/code/menu_controller.cpp
index 78adafc2f..80e8fd4af 100644
--- a/apps/code/menu_controller.cpp
+++ b/apps/code/menu_controller.cpp
@@ -273,7 +273,7 @@ void MenuController::willDisplayScriptTitleCellForIndex(HighlightCell * cell, in
 }
 
 void MenuController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY, bool withinTemporarySelection) {
-  if (!withinTemporarySelection && selectedRow() == numberOfRows() - 1 && selectedColumn() == 1 && m_shouldDisplayAddScriptRow) {
+  if (selectedRow() == numberOfRows() - 1 && selectedColumn() == 1 && m_shouldDisplayAddScriptRow) {
     t->selectCellAtLocation(0, numberOfRows()-1);
   }
 }
diff --git a/apps/shared/function_list_controller.cpp b/apps/shared/function_list_controller.cpp
index 9dfa8dce2..c2e9dee28 100644
--- a/apps/shared/function_list_controller.cpp
+++ b/apps/shared/function_list_controller.cpp
@@ -218,7 +218,7 @@ void FunctionListController::tableViewDidChangeSelection(SelectableTableView * t
   // Update memoization of cell heights
   ExpressionModelListController::tableViewDidChangeSelection(t, previousSelectedCellX, previousSelectedCellY, withinTemporarySelection);
   // Do not select the cell left of the "addEmptyFunction" cell
-  if (!withinTemporarySelection && isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
+  if (isAddEmptyRow(selectedRow()) && selectedColumn() == 0) {
     t->selectCellAtLocation(1, numberOfRows()-1);
   }
 }

From f5cdf95bc50d0e99a59f33f2385e9c4d4b50dc6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 16:31:14 +0200
Subject: [PATCH 284/295] [apps/banner_view] Replace assert with escape case

---
 apps/shared/banner_view.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/shared/banner_view.cpp b/apps/shared/banner_view.cpp
index b99389d9d..aa083f127 100644
--- a/apps/shared/banner_view.cpp
+++ b/apps/shared/banner_view.cpp
@@ -21,7 +21,12 @@ KDSize BannerView::minimalSizeForOptimalDisplay() const {
 }
 
 void BannerView::layoutSubviews() {
-  assert(!m_frame.isEmpty());
+  if (m_frame.isEmpty()) {
+    /* If the frame has not been set yet, there is no point in layouting the
+     * subviews.
+     * TODO: Do not call layout Subviews if the frame has not been set? */
+    return;
+  }
   /* We iterate on subviews, adding their width until we exceed the view bound.
   * The last subview that exceeds the bound is recorded as the first subview of
   * the next line. For the current line, we scan again the subviews and frame

From 7f373a5c3c6958ad4eabc8eadbbd10cf2601a9b9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 15:38:33 +0200
Subject: [PATCH 285/295] [calculation] Calculations involving matrices display
 only approximate results and should not toggle the exact output.

---
 apps/calculation/calculation.cpp | 4 ++++
 poincare/src/expression.cpp      | 3 +--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index 34044090b..a9d718484 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -180,6 +180,10 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
         *context, true))
   {
     m_displayOutput = DisplayOutput::ApproximateOnly;
+  } else if (exactOutput().recursivelyMatches(Expression::IsMatrix, *context, false)) {
+    /* We do not need to replace symbols here because we recursively test the
+     * exact output where symbol have already been replaced. */
+    m_displayOutput = DisplayOutput::ApproximateOnly;
   } else if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 876913d34..2e40a4249 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -97,8 +97,7 @@ bool Expression::recursivelyMatches(ExpressionTest test, Context & context, bool
 bool Expression::isApproximate(Context & context) const {
   return recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) {
       return e.type() == ExpressionNode::Type::Decimal
-      || e.type() == ExpressionNode::Type::Float
-        || IsMatrix(e, context, replaceSymbols)
+        || e.type() == ExpressionNode::Type::Float
         || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
             && replaceSymbols
             && SymbolAbstract::matches(

From cbbb827532487cbf7622ccefa24d73ea5eb8fa7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 16:41:36 +0200
Subject: [PATCH 286/295] [poincare] Clean recursive tests on expression
 (isApproximate, IsRandom, IsMatrix etc)

---
 apps/calculation/calculation.cpp       |  4 +-
 apps/calculation/calculation_store.cpp |  4 +-
 apps/solver/equation.cpp               |  4 +-
 poincare/include/poincare/expression.h | 13 ++---
 poincare/src/expression.cpp            | 67 ++++++++------------------
 poincare/src/logarithm.cpp             |  4 +-
 poincare/src/multiplication.cpp        |  2 +-
 poincare/src/power.cpp                 |  2 +-
 poincare/src/store.cpp                 |  2 +-
 poincare/src/symbol_abstract.cpp       |  2 +-
 10 files changed, 40 insertions(+), 64 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index a9d718484..f2f794489 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -172,7 +172,7 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
   }
   if (shouldOnlyDisplayExactOutput()) {
     m_displayOutput = DisplayOutput::ExactOnly;
-  } else if (exactOutput().recursivelyMatches([](const Expression e, Context & c, bool replaceSymbols) {
+  } else if (exactOutput().recursivelyMatches([](const Expression e, Context & c) {
         /* If the exact result contains one of the following types, do not
          * display it. */
         ExpressionNode::Type t = e.type();
@@ -192,7 +192,7 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
   } else if (strcmp(m_exactOutputText, Undefined::Name()) == 0 || strcmp(m_approximateOutputText, Unreal::Name()) == 0) {
     // If the approximate result is 'unreal' or the exact result is 'undef'
     m_displayOutput = DisplayOutput::ApproximateOnly;
-  } else if (input().isApproximate(*context) || exactOutput().isApproximate(*context)) {
+  } else if (input().recursivelyMatches(Expression::IsApproximate, *context) || exactOutput().recursivelyMatches(Expression::IsApproximate, *context)) {
     m_displayOutput = DisplayOutput::ExactAndApproximateToggle;
   } else {
     m_displayOutput = DisplayOutput::ExactAndApproximate;
diff --git a/apps/calculation/calculation_store.cpp b/apps/calculation/calculation_store.cpp
index d235445d1..618439860 100644
--- a/apps/calculation/calculation_store.cpp
+++ b/apps/calculation/calculation_store.cpp
@@ -96,10 +96,10 @@ Expression CalculationStore::ansExpression(Context * context) {
    * To avoid turning 'ans->A' in '2->A->A' or '2=A->A' (which cannot be
    * parsed), ans is replaced by the approximation output when any Store or
    * Equal expression appears. */
-  bool exactOuptutInvolvesStoreEqual = lastCalculation->exactOutput().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) {
+  bool exactOuptutInvolvesStoreEqual = lastCalculation->exactOutput().recursivelyMatches([](const Expression e, Context & context) {
           return e.type() == ExpressionNode::Type::Store || e.type() == ExpressionNode::Type::Equal;
         }, *context, false);
-  if (lastCalculation->input().isApproximate(*context) || exactOuptutInvolvesStoreEqual) {
+  if (lastCalculation->input().recursivelyMatches(Expression::IsApproximate, *context) || exactOuptutInvolvesStoreEqual) {
     return lastCalculation->approximateOutput(context);
   }
   return lastCalculation->exactOutput();
diff --git a/apps/solver/equation.cpp b/apps/solver/equation.cpp
index 583deaf7f..e8586ae01 100644
--- a/apps/solver/equation.cpp
+++ b/apps/solver/equation.cpp
@@ -18,7 +18,7 @@ Equation::Equation(Ion::Storage::Record record) :
 }
 
 bool Equation::containsIComplex(Context * context) const {
-  return expressionClone().recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
+  return expressionClone().recursivelyMatches([](const Expression e, Context & context) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, *context, true);
 }
 
 Expression Equation::Model::standardForm(const Storage::Record * record, Context * context) const {
@@ -28,7 +28,7 @@ Expression Equation::Model::standardForm(const Storage::Record * record, Context
       m_standardForm = Unreal::Builder();
       return m_standardForm;
     }
-    if (e.recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Undefined || e.type() == ExpressionNode::Type::Infinity || Expression::IsMatrix(e, context, replaceSymbols); }, *context, true)) {
+    if (e.recursivelyMatches([](const Expression e, Context & context) { return e.type() == ExpressionNode::Type::Undefined || e.type() == ExpressionNode::Type::Infinity || Expression::IsMatrix(e, context); }, *context, true)) {
       m_standardForm = Undefined::Builder();
       return m_standardForm;
     }
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index f889f4cc7..2d3a09fe8 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -129,13 +129,14 @@ public:
   bool isRationalZero() const;
   bool isRationalOne() const;
   bool isRandom() const { return node()->isRandom(); }
-  static bool IsRandom(const Expression e, Context & context, bool replaceSymbols);
-  typedef bool (*ExpressionTest)(const Expression e, Context & context, bool replaceSymbols);
-  bool recursivelyMatches(ExpressionTest test, Context & context, bool replaceSymbols) const;
-  bool isApproximate(Context & context) const;
-  bool recursivelyMatchesInfinity(Context & context) { return recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Infinity; }, context, true); }
-  static bool IsMatrix(const Expression e, Context & context, bool replaceSymbols);
   bool isParameteredExpression() const { return node()->isParameteredExpression(); }
+  typedef bool (*ExpressionTest)(const Expression e, Context & context);
+  bool recursivelyMatches(ExpressionTest test, Context & context, bool replaceSymbols = true) const;
+  // Set of ExpressionTest that can be used with recursivelyMatches
+  static bool IsApproximate(const Expression e, Context & context);
+  static bool IsRandom(const Expression e, Context & context);
+  static bool IsMatrix(const Expression e, Context & context);
+  static bool IsInfinity(const Expression e, Context & context);
   /* 'characteristicXRange' tries to assess the range on x where the expression
    * (considered as a function on x) has an interesting evolution. For example,
    * the period of the function on 'x' if it is periodic. If
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 2e40a4249..3a1b8ca17 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -83,9 +83,13 @@ bool Expression::isRationalOne() const {
 }
 
 bool Expression::recursivelyMatches(ExpressionTest test, Context & context, bool replaceSymbols) const {
-  if (test(*this, context, replaceSymbols)) {
+  if (test(*this, context)) {
     return true;
   }
+  ExpressionNode::Type t = type();
+  if (replaceSymbols && (t == ExpressionNode::Type::Symbol || t == ExpressionNode::Type::Function)) {
+    return SymbolAbstract::matches(convert<const SymbolAbstract>(), test, context);
+  }
   for (int i = 0; i < this->numberOfChildren(); i++) {
     if (childAtIndex(i).recursivelyMatches(test, context, replaceSymbols)) {
       return true;
@@ -94,57 +98,26 @@ bool Expression::recursivelyMatches(ExpressionTest test, Context & context, bool
   return false;
 }
 
-bool Expression::isApproximate(Context & context) const {
-  return recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) {
-      return e.type() == ExpressionNode::Type::Decimal
-        || e.type() == ExpressionNode::Type::Float
-        || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
-            && replaceSymbols
-            && SymbolAbstract::matches(
-                static_cast<const SymbolAbstract&>(e),
-                [](const Expression e, Context & context, bool replaceSymbols) {
-                  return e.isApproximate(context);
-                },
-                context));
-        }, context, true);
+bool Expression::IsApproximate(const Expression e, Context & context) {
+  return e.type() == ExpressionNode::Type::Decimal || e.type() == ExpressionNode::Type::Float;
 }
 
-bool Expression::IsRandom(const Expression e, Context & context, bool replaceSymbols) {
-  return e.isRandom()
-    || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
-        && replaceSymbols
-        && SymbolAbstract::matches(
-            static_cast<const Symbol&>(e),
-            [](const Expression e, Context & context, bool replaceSymbols) {
-              return e.recursivelyMatches(
-                  [](const Expression e, Context & context, bool replaceSymbols) {
-                    return Expression::IsRandom(e, context, replaceSymbols);
-                  },
-                  context, replaceSymbols);
-            },
-            context));
+bool Expression::IsRandom(const Expression e, Context & context) {
+  return e.isRandom();
 }
 
-bool Expression::IsMatrix(const Expression e, Context & context, bool replaceSymbols) {
+bool Expression::IsMatrix(const Expression e, Context & context) {
   return e.type() == ExpressionNode::Type::Matrix
     || e.type() == ExpressionNode::Type::ConfidenceInterval
     || e.type() == ExpressionNode::Type::MatrixDimension
     || e.type() == ExpressionNode::Type::PredictionInterval
     || e.type() == ExpressionNode::Type::MatrixInverse
-    || e.type() == ExpressionNode::Type::MatrixTranspose
     || e.type() == ExpressionNode::Type::MatrixIdentity
-    || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
-        && replaceSymbols
-        && SymbolAbstract::matches(
-            static_cast<const Symbol&>(e),
-            [](const Expression e, Context & context, bool replaceSymbols) {
-              return e.recursivelyMatches(
-                  [](const Expression e, Context & context, bool replaceSymbols) {
-                    return Expression::IsMatrix(e, context, replaceSymbols);
-                  },
-                  context, replaceSymbols);
-            },
-            context));
+    || e.type() == ExpressionNode::Type::MatrixTranspose;
+}
+
+bool Expression::IsInfinity(const Expression e, Context & context) {
+  return e.type() == ExpressionNode::Type::Infinity;
 }
 
 bool containsVariables(const Expression e, char * variables, int maxVariableSize) {
@@ -192,7 +165,7 @@ bool Expression::getLinearCoefficients(char * variables, int maxVariableSize, Ex
         /* degree is supposed to be 0 or 1. Otherwise, it means that equation
          * is 'undefined' due to the reduction of 0*inf for example.
          * (ie, x*y*inf = 0) */
-        assert(!recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.isUndefined(); }, context, true));
+        assert(!recursivelyMatches([](const Expression e, Context & context) { return e.isUndefined(); }, context, true));
         return false;
     }
     /* The equation is can be written: a_1*x+a_0 with a_1 and a_0 x-independent.
@@ -260,7 +233,7 @@ void Expression::defaultSetChildrenInPlace(Expression other) {
 }
 
 bool Expression::hasReplaceableSymbols(Context & context) const {
-  return recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) {
+  return recursivelyMatches([](const Expression e, Context & context) {
       return (e.type() == ExpressionNode::Type::Symbol
           && !static_cast<const Symbol &>(e).isSystemSymbol()
           && !context.expressionForSymbol(static_cast<const Symbol &>(e), false).isUninitialized())
@@ -366,7 +339,7 @@ Preferences::ComplexFormat Expression::UpdatedComplexFormatWithTextInput(Prefere
 }
 
 Preferences::ComplexFormat Expression::UpdatedComplexFormatWithExpressionInput(Preferences::ComplexFormat complexFormat, const Expression & exp, Context & context) {
-  if (complexFormat == Preferences::ComplexFormat::Real && exp.recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, context, true)) {
+  if (complexFormat == Preferences::ComplexFormat::Real && exp.recursivelyMatches([](const Expression e, Context & context) { return e.type() == ExpressionNode::Type::Constant && static_cast<const Constant &>(e).isIComplex(); }, context, true)) {
     return Preferences::ComplexFormat::Cartesian;
   }
   return complexFormat;
@@ -557,10 +530,12 @@ Expression Expression::reduce(Context & context, Preferences::ComplexFormat comp
 Expression Expression::deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
 #if MATRIX_EXACT_REDUCING
 #else
-  if (IsMatrix(*this, context, true)) {
+#if 0
+  if (IsMatrix(*this, context)) {
     sSimplificationHasBeenInterrupted = true;
     return *this;
   }
+#endif
 #endif
 
   deepReduceChildren(context, complexFormat, angleUnit, target, symbolicComputation);
diff --git a/poincare/src/logarithm.cpp b/poincare/src/logarithm.cpp
index 95c80e5c7..ea281ebf8 100644
--- a/poincare/src/logarithm.cpp
+++ b/poincare/src/logarithm.cpp
@@ -223,7 +223,7 @@ Expression Logarithm::simpleShallowReduce(Context & context, Preferences::Comple
     replaceWithInPlace(result);
     return result;
   }
-  bool infiniteArg = c.recursivelyMatchesInfinity(context);
+  bool infiniteArg = c.recursivelyMatches(Expression::IsInfinity, context);
   // log(x,x)->1 with x != inf and log(inf,inf) = undef
   if (c.isIdenticalTo(b)) {
     Expression result = infiniteArg ? Undefined::Builder().convert<Expression>() : Rational::Builder(1).convert<Expression>();
@@ -241,7 +241,7 @@ Expression Logarithm::simpleShallowReduce(Context & context, Preferences::Comple
     const Rational r = static_cast<Rational &>(c);
     // log(0, x) = -inf if x > 1 && x != inf || inf x < 1 || undef if x < 0
     if (r.isZero()) {
-      bool infiniteBase = b.recursivelyMatchesInfinity(context);
+      bool infiniteBase = b.recursivelyMatches(Expression::IsInfinity, context);
       // Special case: log(0,inf) -> undef
       if (infiniteBase) {
         Expression result = Undefined::Builder();
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index b21f39e11..2728ae2c4 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -450,7 +450,7 @@ Expression Multiplication::privateShallowReduce(Context & context, Preferences::
       // Check that other children don't match inf
       bool infiniteFactor = false;
       for (int i = 1; i < numberOfChildren(); i++) {
-        infiniteFactor = childAtIndex(i).recursivelyMatchesInfinity(context);
+        infiniteFactor = childAtIndex(i).recursivelyMatches(Expression::IsInfinity, context);
         if (infiniteFactor) {
           break;
         }
diff --git a/poincare/src/power.cpp b/poincare/src/power.cpp
index f17f5d676..298b6f677 100644
--- a/poincare/src/power.cpp
+++ b/poincare/src/power.cpp
@@ -384,7 +384,7 @@ Expression Power::shallowReduce(Context & context, Preferences::ComplexFormat co
       }
     }
     // 1^x = 1 if x != ±inf
-    if (a.isOne() && !childAtIndex(1).recursivelyMatchesInfinity(context)) {
+    if (a.isOne() && !childAtIndex(1).recursivelyMatches(Expression::IsInfinity, context)) {
       Expression result = Rational::Builder(1);
       replaceWithInPlace(result);
       return result;
diff --git a/poincare/src/store.cpp b/poincare/src/store.cpp
index 40b21c630..9d25f0a50 100644
--- a/poincare/src/store.cpp
+++ b/poincare/src/store.cpp
@@ -17,7 +17,7 @@ namespace Poincare {
 
 void StoreNode::deepReduceChildren(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
   // Interrupt simplification if the expression stored contains a matrix
-  if (Expression(childAtIndex(0)).recursivelyMatches([](const Expression e, Context & context, bool replaceSymbols) { return Expression::IsMatrix(e, context, replaceSymbols); }, context, true)) {
+  if (Expression(childAtIndex(0)).recursivelyMatches([](const Expression e, Context & context) { return Expression::IsMatrix(e, context); }, context, true)) {
     Expression::SetInterruption(true);
   }
 }
diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index 8ea0b00ed..83044b051 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -53,7 +53,7 @@ size_t SymbolAbstract::TruncateExtension(char * dst, const char * src, size_t le
 
 bool SymbolAbstract::matches(const SymbolAbstract & symbol, ExpressionTest test, Context & context) {
   Expression e = SymbolAbstract::Expand(symbol, context, false);
-  return !e.isUninitialized() && test(e, context, false);
+  return !e.isUninitialized() && e.recursivelyMatches(test, context, false);
 }
 
 Expression SymbolAbstract::Expand(const SymbolAbstract & symbol, Context & context, bool clone) {

From 6c03a5ac0ea3a3784f4b8dad4f876b10105fe4dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Thu, 2 May 2019 16:46:39 +0200
Subject: [PATCH 287/295] [poincare/MatrixIdentity] Fix float->int conversion
 problem

Scenario: in calculation, identity(permute(20,20))
---
 poincare/src/matrix_identity.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index 7dab6e4ea..fb6246d37 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -28,7 +28,9 @@ Evaluation<T> MatrixIdentityNode::templatedApproximate(Context& context, Prefere
   Evaluation<T> input = childAtIndex(0)->approximate(T(), context, complexFormat, angleUnit);
   T r = input.toScalar(); // Undefined if the child is not real
   if (!std::isnan(r) && !std::isinf(r) && r > 0 // The child is defined and positive
-      && std::ceil(r) ==  std::floor(r)) { // The child is an integer
+      && std::ceil(r) == std::floor(r) // The child is an integer
+      &&  r < ((float) INT_MAX)) // The child is not too big
+  {
     return MatrixComplex<T>::CreateIdentity((int)r);
   }
   return Complex<T>::Undefined();

From 8c2f8a9aeafe2b5f129a26000d1aca1969cdcdf6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 16:55:32 +0200
Subject: [PATCH 288/295] [calculation] DisplayOutput: avoid to recursively
 scan the expression multiple times instead of one.

---
 apps/calculation/calculation.cpp | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/apps/calculation/calculation.cpp b/apps/calculation/calculation.cpp
index f2f794489..b04d232a1 100644
--- a/apps/calculation/calculation.cpp
+++ b/apps/calculation/calculation.cpp
@@ -172,18 +172,18 @@ Calculation::DisplayOutput Calculation::displayOutput(Context * context) {
   }
   if (shouldOnlyDisplayExactOutput()) {
     m_displayOutput = DisplayOutput::ExactOnly;
-  } else if (exactOutput().recursivelyMatches([](const Expression e, Context & c) {
-        /* If the exact result contains one of the following types, do not
-         * display it. */
-        ExpressionNode::Type t = e.type();
-        return (t == ExpressionNode::Type::Random) || (t == ExpressionNode::Type::Round);},
+  } else if (input().recursivelyMatches(
+        [](const Expression e, Context & c) {
+          /* If the input contains:
+           * - Random
+           * - Round
+           * or involves a Matrix, we only display the approximate output. */
+          ExpressionNode::Type t = e.type();
+          return (t == ExpressionNode::Type::Random) || (t == ExpressionNode::Type::Round) || Expression::IsMatrix(e, c);
+        },
         *context, true))
   {
     m_displayOutput = DisplayOutput::ApproximateOnly;
-  } else if (exactOutput().recursivelyMatches(Expression::IsMatrix, *context, false)) {
-    /* We do not need to replace symbols here because we recursively test the
-     * exact output where symbol have already been replaced. */
-    m_displayOutput = DisplayOutput::ApproximateOnly;
   } else if (strcmp(m_exactOutputText, m_approximateOutputText) == 0) {
     /* If the exact and approximate results' texts are equal and their layouts
      * too, do not display the exact result. If the two layouts are not equal

From 7ebd782d17b14b84846aa1e46c0255e7f2d9e2d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Thu, 2 May 2019 18:11:03 +0200
Subject: [PATCH 289/295] [poincare] Missing include

---
 poincare/src/matrix_identity.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/poincare/src/matrix_identity.cpp b/poincare/src/matrix_identity.cpp
index fb6246d37..03234321d 100644
--- a/poincare/src/matrix_identity.cpp
+++ b/poincare/src/matrix_identity.cpp
@@ -4,6 +4,7 @@
 #include <poincare/serialization_helper.h>
 #include <poincare/undefined.h>
 #include <cmath>
+#include <limits.h>
 
 namespace Poincare {
 

From 93b81cb26ca3eac70305f562cf97ce66e14c6600 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 09:22:39 +0200
Subject: [PATCH 290/295] [poincare] Tests: fix build

---
 apps/calculation/test/calculation_store.cpp |  2 +-
 poincare/test/user_variable.cpp             | 13 +++++++++----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/apps/calculation/test/calculation_store.cpp b/apps/calculation/test/calculation_store.cpp
index d132110ea..05633b529 100644
--- a/apps/calculation/test/calculation_store.cpp
+++ b/apps/calculation/test/calculation_store.cpp
@@ -63,7 +63,7 @@ QUIZ_CASE(calculation_ans) {
 
   store.push("ans+0.22", &globalContext);
   lastCalculation = store.calculationAtIndex(2);
-  quiz_assert(lastCalculation->displayOutput(&globalContext) == ::Calculation::Calculation::DisplayOutput::ApproximateOnly);
+  quiz_assert(lastCalculation->displayOutput(&globalContext) == ::Calculation::Calculation::DisplayOutput::ExactAndApproximateToggle);
   quiz_assert(strcmp(lastCalculation->approximateOutputText(),"2.6366666666667") == 0);
 
   store.deleteAll();
diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index ea66cbf23..1a4da5461 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -185,18 +185,23 @@ QUIZ_CASE(poincare_user_variable_properties) {
   Shared::GlobalContext context;
 
   assert_parsed_expression_evaluates_to<double>("[[1]]→a", "[[1]]");
-  quiz_assert(Symbol::Builder('a').isApproximate(context));
-  quiz_assert(Poincare::Expression::IsMatrix(Symbol::Builder('a'), context, true));
+  quiz_assert(Poincare::Expression::IsMatrix(Symbol::Builder('a'), context));
+
+  assert_parsed_expression_evaluates_to<double>("1.2→b", "1.2");
+  quiz_assert(Symbol::Builder('b').recursivelyMatches(Expression::IsApproximate, context, true));
 
   /* [[x]]→f(x) expression contains a matrix, so its simplification is going
    * to be interrupted. We thus rather approximate it instead of simplifying it.
    * TODO: use parse_and_simplify when matrix are simplified. */
 
   assert_parsed_expression_evaluates_to<double>("[[x]]→f(x)", "[[undef]]");
-  quiz_assert(Function::Builder("f", 1, Rational::Builder(2)).isApproximate(context));
-  quiz_assert(Poincare::Expression::IsMatrix(Function::Builder("f", 1, Symbol::Builder('x')), context, true));
+  quiz_assert(Poincare::Expression::IsMatrix(Function::Builder("f", 1, Symbol::Builder('x')), context));
+  assert_parsed_expression_evaluates_to<double>("0.2*x→g(x)", "undef");
+  quiz_assert(Function::Builder("g", 1, Rational::Builder(2)).recursivelyMatches(Expression::IsApproximate, context, true));
 
   // Clean the storage for other tests
   Ion::Storage::sharedStorage()->recordNamed("a.exp").destroy();
+  Ion::Storage::sharedStorage()->recordNamed("b.exp").destroy();
   Ion::Storage::sharedStorage()->recordNamed("f.func").destroy();
+  Ion::Storage::sharedStorage()->recordNamed("g.func").destroy();
 }

From e49b8036498d4f7c66515354684e810c7076ee5c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 09:40:56 +0200
Subject: [PATCH 291/295] [poincare] Expression: fix deepReduce: any matrix
 expression interrupts the simplification

---
 poincare/src/expression.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 3a1b8ca17..8f4f90711 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -530,12 +530,10 @@ Expression Expression::reduce(Context & context, Preferences::ComplexFormat comp
 Expression Expression::deepReduce(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit, ExpressionNode::ReductionTarget target, bool symbolicComputation) {
 #if MATRIX_EXACT_REDUCING
 #else
-#if 0
   if (IsMatrix(*this, context)) {
     sSimplificationHasBeenInterrupted = true;
     return *this;
   }
-#endif
 #endif
 
   deepReduceChildren(context, complexFormat, angleUnit, target, symbolicComputation);

From 97511ff1ac3acf89af92ebc258111a34b4ca3ff5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 12:03:16 +0200
Subject: [PATCH 292/295] [poincare] Fix tests with
 Expression::recursivelyMatches cleaning

---
 poincare/test/user_variable.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/poincare/test/user_variable.cpp b/poincare/test/user_variable.cpp
index 1a4da5461..e19b81a66 100644
--- a/poincare/test/user_variable.cpp
+++ b/poincare/test/user_variable.cpp
@@ -185,7 +185,7 @@ QUIZ_CASE(poincare_user_variable_properties) {
   Shared::GlobalContext context;
 
   assert_parsed_expression_evaluates_to<double>("[[1]]→a", "[[1]]");
-  quiz_assert(Poincare::Expression::IsMatrix(Symbol::Builder('a'), context));
+  quiz_assert(Symbol::Builder('a').recursivelyMatches(Expression::IsMatrix, context));
 
   assert_parsed_expression_evaluates_to<double>("1.2→b", "1.2");
   quiz_assert(Symbol::Builder('b').recursivelyMatches(Expression::IsApproximate, context, true));
@@ -195,7 +195,7 @@ QUIZ_CASE(poincare_user_variable_properties) {
    * TODO: use parse_and_simplify when matrix are simplified. */
 
   assert_parsed_expression_evaluates_to<double>("[[x]]→f(x)", "[[undef]]");
-  quiz_assert(Poincare::Expression::IsMatrix(Function::Builder("f", 1, Symbol::Builder('x')), context));
+  quiz_assert(Function::Builder("f", 1, Symbol::Builder('x')).recursivelyMatches(Poincare::Expression::IsMatrix, context));
   assert_parsed_expression_evaluates_to<double>("0.2*x→g(x)", "undef");
   quiz_assert(Function::Builder("g", 1, Rational::Builder(2)).recursivelyMatches(Expression::IsApproximate, context, true));
 

From 9a411874eecb2cb6985a83e4bfebe86d1b37636f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 14:34:16 +0200
Subject: [PATCH 293/295] [code] Console: when displaying results, do not split
 in lines in middle of code points. Otherwise, this triggers crashes when
 manipulaping the text (removing code point for instance)

---
 apps/code/console_controller.cpp | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/apps/code/console_controller.cpp b/apps/code/console_controller.cpp
index 429a0f170..bc6fdf4bc 100644
--- a/apps/code/console_controller.cpp
+++ b/apps/code/console_controller.cpp
@@ -424,11 +424,24 @@ void ConsoleController::appendTextToOutputAccumulationBuffer(const char * text,
     memcpy(&m_outputAccumulationBuffer[endOfAccumulatedText], text, length);
     return;
   }
-  memcpy(&m_outputAccumulationBuffer[endOfAccumulatedText], text, spaceLeft-1);
+  /* The text to append is too long for the buffer. We need to split it in
+   * chunks. We take special care not to break in the middle of code points! */
+  int maxAppendedTextLength = spaceLeft-1; // we keep the last char to null-terminate the buffer
+  int appendedTextLength = 0;
+  UTF8Decoder decoder(text);
+  while (decoder.stringPosition() - text <= maxAppendedTextLength) {
+    appendedTextLength = decoder.stringPosition() - text;
+    decoder.nextCodePoint();
+  }
+  memcpy(&m_outputAccumulationBuffer[endOfAccumulatedText], text, appendedTextLength);
+  // The last char of m_outputAccumulationBuffer is kept to 0 to ensure a null-terminated text.
+  assert(endOfAccumulatedText+appendedTextLength < k_outputAccumulationBufferSize);
+  m_outputAccumulationBuffer[endOfAccumulatedText+appendedTextLength] = 0;
   flushOutputAccumulationBufferToStore();
-  appendTextToOutputAccumulationBuffer(&text[spaceLeft-1], length - (spaceLeft - 1));
+  appendTextToOutputAccumulationBuffer(&text[appendedTextLength], length - appendedTextLength);
 }
 
+// TODO: is it really needed? Maybe discard to optimize?
 void ConsoleController::emptyOutputAccumulationBuffer() {
   for (int i = 0; i < k_outputAccumulationBufferSize; i++) {
     m_outputAccumulationBuffer[i] = 0;

From b8c92bf686129b6e4989d10a2371f87a45598d11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 15:50:58 +0200
Subject: [PATCH 294/295] [poincare] Matrix: fix error of computations in
 number of matrix entries

---
 poincare/src/matrix.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/poincare/src/matrix.cpp b/poincare/src/matrix.cpp
index e0a68a7c1..b06957e3b 100644
--- a/poincare/src/matrix.cpp
+++ b/poincare/src/matrix.cpp
@@ -138,8 +138,10 @@ int Matrix::ArrayInverse(T * array, int numberOfRows, int numberOfColumns) {
   }
   assert(numberOfRows*numberOfColumns <= k_maxNumberOfCoefficients);
   int dim = numberOfRows;
-  /* Create the matrix inv = (A|I) with A the input matrix and I the dim identity matrix */
-  T operands[k_maxNumberOfCoefficients*(3/2)]; // inv dimensions: dim x (2*dim)
+  /* Create the matrix inv = (A|I) with A the input matrix and I the dim identity matrix
+   * (A is squared with less than k_maxNumberOfCoefficients so (A|I) has less than
+   * 2*k_maxNumberOfCoefficients */
+  T operands[2*k_maxNumberOfCoefficients];
   for (int i = 0; i < dim; i++) {
     for (int j = 0; j < dim; j++) {
       operands[i*2*dim+j] = array[i*numberOfColumns+j];

From c1c280762f703f3598ae2e9917a610736796188b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 3 May 2019 15:51:43 +0200
Subject: [PATCH 295/295] [regression] Add an assertion on the number of
 entries of matrices used in models

---
 apps/regression/model/model.cpp    | 1 +
 poincare/include/poincare/matrix.h | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/regression/model/model.cpp b/apps/regression/model/model.cpp
index 3b287687d..eb90bb77e 100644
--- a/apps/regression/model/model.cpp
+++ b/apps/regression/model/model.cpp
@@ -170,6 +170,7 @@ int Model::solveLinearSystem(double * solutions, double * coefficients, double *
   for (int i = 0; i < n * n; i++) {
     coefficientsSave[i] = coefficients[i];
   }
+  assert(k_maxNumberOfCoefficients < Matrix::k_maxNumberOfCoefficients);
   int inverseResult = Matrix::ArrayInverse(coefficients, n, n);
   int numberOfMatrixModifications = 0;
   while (inverseResult < 0 && numberOfMatrixModifications < k_maxMatrixInversionFixIterations) {
diff --git a/poincare/include/poincare/matrix.h b/poincare/include/poincare/matrix.h
index b015b81de..d042bc939 100644
--- a/poincare/include/poincare/matrix.h
+++ b/poincare/include/poincare/matrix.h
@@ -84,10 +84,9 @@ public:
   /* createInverse can be called on any matrix reduce or not, approximate or not. */
   Expression inverse(Context & context, Preferences::ComplexFormat complexFormat, Preferences::AngleUnit angleUnit) const;
 #endif
-private:
   // TODO: find another solution for inverse and determinant (avoid capping the matrix)
   static constexpr int k_maxNumberOfCoefficients = 100;
-
+private:
   MatrixNode * node() const { return static_cast<MatrixNode *>(Expression::node()); }
   void setNumberOfRows(int rows) { assert(rows >= 0); node()->setNumberOfRows(rows); }
   void setNumberOfColumns(int columns) { assert(columns >= 0); node()->setNumberOfColumns(columns); }