[apps\shared] Create a folder shared/

Change-Id: I94e4474ff5ab3bf9db7afd5b3be57b985755ecdf

apps/shared/expression_text_field_delegate.cpp

@@ -0,0 +1,79 @@
+#include "expression_text_field_delegate.h"
+#include "../apps_container.h"
+#include <math.h>
+#include <string.h>
+
+using namespace Poincare;
+
+const char * ExpressionTextFieldDelegate::XNT() {
+  return "x";
+}
+
+bool ExpressionTextFieldDelegate::cursorInToken(TextField * textField, const char * token) {
+  const char * text = textField->text();
+  int location = textField->cursorLocation();
+  int tokenLength = strlen(token);
+  while (text[location] != '(') {
+    location --;
+  }
+  if (location - tokenLength < 0) {
+    return false;
+  }
+  char previousToken[10];
+  strlcpy(previousToken, text+location-tokenLength, tokenLength+1);
+  if (strcmp(previousToken, token) == 0) {
+    return true;
+  }
+  return false;
+}
+
+bool ExpressionTextFieldDelegate::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
+  if (event == Ion::Events::OK && textField->isEditing()) {
+    Expression * exp = Expression::parse(textField->text());
+    if (exp == nullptr) {
+      if (textField->textLength() == 0) {
+        return true;
+      }
+      textField->app()->displayWarning("Attention a la syntaxe jeune padawan");
+      return true;
+    }
+    Expression * evaluation = exp->evaluate(*localContext());
+    if (evaluation == nullptr) {
+      delete exp;
+      textField->app()->displayWarning("Relis ton cours de maths, veux tu?");
+      return true;
+    } else {
+      delete evaluation;
+      delete exp;
+    }
+  }
+  if (event == Ion::Events::Toolbox && textField->isEditing()) {
+    AppsContainer * appsContainer = (AppsContainer *)textField->app()->container();
+    ToolboxController * toolboxController = appsContainer->toolboxController();
+    toolboxController->setTextFieldCaller(textField);
+    textField->app()->displayModalViewController(toolboxController, 0.f, 0.f, 50, 50, 0, 50);
+    return true;
+  }
+  if (event == Ion::Events::Var && textField->isEditing()) {
+    AppsContainer * appsContainer = (AppsContainer *)textField->app()->container();
+    VariableBoxController * variableBoxController = appsContainer->variableBoxController();
+    variableBoxController->setTextFieldCaller(textField);
+    textField->app()->displayModalViewController(variableBoxController, 0.f, 0.f, 50, 50, 0, 50);
+    return true;
+  }
+  if (event == Ion::Events::XNT) {
+    if (!textField->isEditing()) {
+      textField->setEditing(true);
+      textField->setText("");
+    }
+    if (cursorInToken(textField, "sum") || cursorInToken(textField, "product")) {
+      textField->insertTextAtLocation("n", textField->cursorLocation());
+      textField->setCursorLocation(textField->cursorLocation()+strlen("n"));
+      return true;
+    }
+    textField->insertTextAtLocation(XNT(), textField->cursorLocation());
+    textField->setCursorLocation(textField->cursorLocation()+strlen(XNT()));
+    return true;
+  }
+  return false;
+}