From f7f6c28185f0425aa99b5476e107e0852a119443 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Aleksander=20=C5=81ukasz?=
 <aleksander.lukasz@nowoczesnapolska.org.pl>
Date: Tue, 17 Dec 2013 11:51:08 +0100
Subject: [PATCH] smartxml: optimize undo for setText transformation

---
 src/smartxml/core.js | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/smartxml/core.js b/src/smartxml/core.js
index 867353d..4d3c2c1 100644
--- a/src/smartxml/core.js
+++ b/src/smartxml/core.js
@@ -188,9 +188,15 @@ var elementNodeTransformations = {
 };
 
 var textNodeTransformations = {
-    setText: function(text) {
-        this.nativeNode.data = text;
-        this.triggerTextChangeEvent();
+    setText: {
+        impl: function(t, text) {
+            t.oldText = this.getText();
+            this.nativeNode.data = text;
+            this.triggerTextChangeEvent();
+        },
+        undo: function(t) {
+            this.setText(t.oldText);
+        }
     },
 
     appendText: function(text) {
-- 
2.20.1