From dd57be8ed39dace069a4f995463fceb3911992d9 Mon Sep 17 00:00:00 2001
From: rachel-fenichel <fenichel@google.com>
Date: Tue, 15 Mar 2016 15:35:19 -0700
Subject: [PATCH] Don't fire events for ghost blocks.

---
 core/block_svg.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/block_svg.js b/core/block_svg.js
index ce19f26e86..8be3558ffa 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -202,9 +202,11 @@ Blockly.BlockSvg.terminateDrag_ = function() {
     // Terminate a drag operation.
     if (selected) {
       if (selected.ghostBlock_) {
+        Blockly.Events.disable();
         selected.ghostBlock_.unplug(true /* healStack */);
         selected.ghostBlock_.dispose();
         selected.ghostBlock_ = null;
+        Blockly.Events.enable();
       }
       // Update the connection locations.
       var xy = selected.getRelativeToSurfaceXY();
@@ -701,9 +703,12 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
     if (Blockly.highlightedConnection_ &&
         Blockly.highlightedConnection_ != closestConnection) {
       if (this.ghostBlock_) {
+        // Don't fire events for ghost block creation or movement.
+        Blockly.Events.disable();
         this.ghostBlock_.unplug(true /* healStack */);
         this.ghostBlock_.dispose();
         this.ghostBlock_ = null;
+        Blockly.Events.enable();
       }
       Blockly.highlightedConnection_.unhighlight();
       Blockly.highlightedConnection_ = null;
@@ -715,6 +720,7 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
       closestConnection.highlight();
       Blockly.highlightedConnection_ = closestConnection;
       Blockly.localConnection_ = localConnection;
+      Blockly.Events.disable();
       if (!this.ghostBlock_){
         this.ghostBlock_ = this.workspace.newBlock(this.type);
         this.ghostBlock_.setGhost(true);
@@ -727,6 +733,7 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
         this.ghostBlock_.previousConnection.connect(closestConnection);
       }
       this.ghostBlock_.render(true);
+      Blockly.Events.enable();
     }
     // Provide visual indication of whether the block will be deleted if
     // dropped here.