[apps] The code app runs Python code

Change-Id: I6034adeb368db2c5d3b64b16f8ad512750cd3bc0

apps/code/editor_controller.cpp

@@ -1,10 +1,52 @@
 #include "editor_controller.h"
 
+extern "C" {
+#include <stdlib.h>
+#include "py/compile.h"
+#include "py/runtime.h"
+#include "py/gc.h"
+#include "py/stackctrl.h"
+}
+
+mp_obj_t execute_from_str(const char *str) {
+    nlr_buf_t nlr;
+    if (nlr_push(&nlr) == 0) {
+        mp_lexer_t *lex = mp_lexer_new_from_str_len(0/*MP_QSTR_*/, str, strlen(str), false);
+        mp_parse_tree_t pt = mp_parse(lex, MP_PARSE_FILE_INPUT);
+        mp_obj_t module_fun = mp_compile(&pt, lex->source_name, MP_EMIT_OPT_NONE, false);
+        mp_call_function_0(module_fun);
+        nlr_pop();
+        return 0;
+    } else {
+        // uncaught exception
+        return (mp_obj_t)nlr.ret_val;
+    }
+}
+
+extern "C"
+void mp_hal_stdout_tx_strn_cooked(const char * str, size_t len) {
+  KDContext * ctx = KDIonContext::sharedContext();
+  ctx->drawString(str, KDPoint(0, 0));
+}
+
+
 EditorController::EditorController(Responder * parentResponder) :
   ViewController(parentResponder),
-  m_view(this, buffer, 256)
+  m_view(this, m_buffer, 256)
 {
-  memcpy(buffer, "Hello\nWorld\nOhOhOh\nThis\nLooks\nlike\nso\nmuch\nfun\nI\nwonder\nhow\nmany very very very very very very very long\nlines\nI\ncan\ndisplay", 256);
+  const char * program =
+
+  "import kandinsky\n"
+"red = kandinsky.color(255,0,0)\n"
+"blue = kandinsky.color(0,0,255)\n"
+"for i in range(100):\n"
+"  for j in range(100):\n"
+"    if ((i+j)%2 == 0):\n"
+"      kandinsky.set_pixel(i, j, red)\n"
+"    else:\n"
+"      kandinsky.set_pixel(i, j, blue)\n";
+
+   memcpy(m_buffer, program, 1024);
 }
 
 void EditorController::didBecomeFirstResponder() {
@@ -16,10 +58,32 @@ View * EditorController::view() {
   return &m_view;
 }
 
-/*
+void EditorController::runPython() {
+  KDContext * c = KDIonContext::sharedContext();
+  c->setOrigin(KDPoint(0,0));
+  c->setClippingRect(KDRect(0, 0, 300, 200));
 
-const char * PicViewController::title() {
-  return "PicView";
+    // Initialized stack limit
+    mp_stack_set_limit(40000);
+
+    char * pythonHeap = (char *)malloc(16384);
+
+    gc_init(pythonHeap, pythonHeap + 16384);
+
+    // Initialize interpreter
+    mp_init();
+
+    if (execute_from_str(m_buffer)) {
+        mp_hal_stdout_tx_strn_cooked("Error", 0);
+    }
+
+    free(pythonHeap);
 }
-*/
 
+bool EditorController::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::OK) {
+    runPython();
+    return true;
+  }
+  return false;
+}