Block and comment events should report language agnostic coordinates so that switching locales (between LTR and RTL languages) does not affect the x position of the blocks and comments on the workspace.

core/block_events.js

@@ -56,6 +56,7 @@ Blockly.Events.BlockBase = function(block) {
    */
   this.blockId = block.id;
   this.workspaceId = block.workspace.id;
+  this.workspace = block.workspace;
 };
 goog.inherits(Blockly.Events.BlockBase, Blockly.Events.Abstract);
 
@@ -463,7 +464,11 @@ Blockly.Events.Move.prototype.currentLocation_ = function() {
       location.inputName = input.name;
     }
   } else {
-    location.coordinate = block.getRelativeToSurfaceXY();
+    var blockXY = block.getRelativeToSurfaceXY();
+    // The X position in the block move event should be the language agnostic
+    // position of the block. I.e. it should not be different in LTR vs. RTL.
+    var rtlAwareX = workspace.RTL ? workspace.getWidth() - blockXY.x : blockXY.x;
+    location.coordinate = new goog.math.Coordinate(rtlAwareX, blockXY.y);
   }
   return location;
 };
@@ -505,7 +510,8 @@ Blockly.Events.Move.prototype.run = function(forward) {
   }
   if (coordinate) {
     var xy = block.getRelativeToSurfaceXY();
-    block.moveBy(coordinate.x - xy.x, coordinate.y - xy.y);
+    var rtlAwareX = workspace.RTL ? workspace.getWidth() - coordinate.x : coordinate.x;
+    block.moveBy(rtlAwareX - xy.x, coordinate.y - xy.y);
   } else {
     var blockConnection = block.outputConnection || block.previousConnection;
     var parentConnection;

core/comment_events.js

@@ -402,11 +402,12 @@ Blockly.Events.CommentMove = function(comment) {
    */
   this.comment_ = comment;
 
+  this.workspaceWidth_ = comment.workspace.getWidth();
   /**
    * The location before the move, in workspace coordinates.
    * @type {!goog.math.Coordinate}
    */
-  this.oldCoordinate_ = comment.getXY();
+  this.oldCoordinate_ = this.currentLocation_();
 
   /**
    * The location after the move, in workspace coordinates.
@@ -416,6 +417,28 @@ Blockly.Events.CommentMove = function(comment) {
 };
 goog.inherits(Blockly.Events.CommentMove, Blockly.Events.CommentBase);
 
+/**
+ * Calculate the current, language agnostic location of the comment.
+ * This value should not report different numbers in LTR vs. RTL.
+ * @return {goog.math.Coordinate} The location of the comment.
+ * @private
+ */
+Blockly.Events.CommentMove.prototype.currentLocation_ = function() {
+  var xy = this.comment_.getXY();
+  if (!this.comment_.workspace.RTL) {
+    return xy;
+  }
+
+  var rtlAwareX;
+  if (this.comment_ instanceof Blockly.ScratchBlockComment) {
+    var commentWidth = this.comment_.getBubbleSize().width;
+    rtlAwareX = this.workspaceWidth_ - xy.x - commentWidth;
+  } else {
+    rtlAwareX = this.workspaceWidth_ - xy.x;
+  }
+  return new goog.math.Coordinate(rtlAwareX, xy.y);
+};
+
 /**
  * Record the comment's new location.  Called after the move.  Can only be
  * called once.
@@ -425,7 +448,7 @@ Blockly.Events.CommentMove.prototype.recordNew = function() {
     throw new Error('Tried to record the new position of a comment on the ' +
         'same event twice.');
   }
-  this.newCoordinate_ = this.comment_.getXY();
+  this.newCoordinate_ = this.currentLocation_();
   this.comment_ = null;
 };
 
@@ -442,7 +465,8 @@ Blockly.Events.CommentMove.prototype.type = Blockly.Events.COMMENT_MOVE;
  *     coordinates.
  */
 Blockly.Events.CommentMove.prototype.setOldCoordinate = function(xy) {
-  this.oldCoordinate_ = xy;
+  this.oldCoordinate_ = new goog.math.Coordinate(this.comment_.workspace.RTL ?
+      this.workspaceWidth_ - xy.x : xy.x, xy.y);
 };
 
 /**
@@ -496,10 +520,20 @@ Blockly.Events.CommentMove.prototype.run = function(forward) {
   var target = forward ? this.newCoordinate_ : this.oldCoordinate_;
 
   if (comment instanceof Blockly.ScratchBlockComment) {
-    comment.moveTo(target.x, target.y);
+    if (comment.workspace.RTL) {
+      comment.moveTo(this.workspaceWidth_ - target.x, target.y);
+    } else {
+      comment.moveTo(target.x, target.y);
+    }
   } else {
     // TODO: Check if the comment is being dragged, and give up if so.
     var current = comment.getXY();
-    comment.moveBy(target.x - current.x, target.y - current.y);
+    if (comment.workspace.RTL) {
+      var deltaX = target.x - (this.workspaceWidth_ - current.x);
+      comment.moveBy(-deltaX, target.y - current.y);
+    } else {
+      comment.moveBy(target.x - current.x, target.y - current.y);
+    }
+
   }
 };

core/workspace_comment_svg.js

@@ -419,8 +419,8 @@ Blockly.WorkspaceCommentSvg.prototype.clearTransformAttributes_ = function() {
 Blockly.WorkspaceCommentSvg.prototype.getBubbleSize = function() {
   if (this.rendered_) {
     return {
-      width: this.svgRect_.getAttribute('width'),
-      height: this.svgRect_.getAttribute('height')
+      width: parseInt(this.svgRect_.getAttribute('width')),
+      height: parseInt(this.svgRect_.getAttribute('height'))
     };
   } else {
     this.getHeightWidth();