From 8652ad3f4a86e5019404ac90be9c7325ad077920 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Aleksander=20=C5=81ukasz?=
 <aleksander.lukasz@nowoczesnapolska.org.pl>
Date: Mon, 2 Dec 2013 14:22:00 +0100
Subject: [PATCH] wip: blocking nested transformations from being pushed on
 undo stack

---
 src/smartxml/smartxml.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index fc9715b..aa9a7c5 100644
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -565,6 +565,7 @@ var Document = function(xml) {
     this.loadXML(xml);
     this.undoStack = [];
     this.redoStack = [];
+    this._transformationLevel = 0;
 };
 
 $.extend(Document.prototype, Backbone.Events, {
@@ -752,8 +753,12 @@ $.extend(Document.prototype, Backbone.Events, {
             }
         } 
         if(transformation) {
+            this._transformationLevel++;
             toret = transformation.run();
-            this.undoStack.push(transformation);
+            if(this._transformationLevel === 1) {
+                this.undoStack.push(transformation);
+            }
+            this._transformationLevel--;
             console.log('clearing redo stack');
             this.redoStack = [];
             return toret;
-- 
2.20.1