Fix global keyword internationalization (#1902)

The global keyword that prefixes global variables is translated, and
this translation ends up in the Blockly XML. We need to keep the
translation separate from the underlying representation so that
projects still work when switching between languages.

Change-Id: I7bc88f0a26c8dce6d256010c188d7233d8cc43f8

appinventor/blocklyeditor/src/field_lexical_variable.js

@@ -79,6 +79,19 @@ goog.inherits(Blockly.FieldLexicalVariable, Blockly.FieldDropdown);
  * @param {string} text New text.
  */
 Blockly.FieldLexicalVariable.prototype.setValue = function(text) {
+  // Fix for issue #1901. If the variable name contains a space separating two words, and the first
+  // isn't "global", then replace the first word with global. This fixes an issue where the
+  // translated "global" keyword was being stored instead of the English keyword, resulting in
+  // errors when moving between languages in the App Inventor UI.
+  // NB: This makes an assumption that we won't allow for multi-word variables in the future. Right
+  // now variables identifiers still need to be a sequence of non-whitespace characters, so only
+  // global variables will split on a space.
+  if (text && text !== ' ') {
+    var parts = text.split(' ');
+    if (parts.length == 2 && parts[0] !== 'global') {
+      text = 'global ' + parts[1];
+    }
+  }
   Blockly.FieldLexicalVariable.superClass_.setValue.call(this, text);
   this.updateMutation();
 };
@@ -213,8 +226,8 @@ Blockly.FieldLexicalVariable.getNamesInScope = function (block) {
   var globalNames = Blockly.FieldLexicalVariable.getGlobalNames(); // from global variable declarations
   // [lyn, 11/24/12] Sort and remove duplicates from namespaces
   globalNames = Blockly.LexicalVariable.sortAndRemoveDuplicates(globalNames);
-  globalNames = globalNames.map(Blockly.prefixGlobalMenuName).map(function(name) {
-    return [name, name];
+  globalNames = globalNames.map(function(name) {
+    return [Blockly.prefixGlobalMenuName(name), 'global ' + name];
   });
   var allLexicalNames = Blockly.FieldLexicalVariable.getLexicalNamesInScope(block);
   // Return a list of all names in scope: global names followed by lexical ones.