Fix: Do not set text on canvas element if it didn't change.

On setting the same text on a text node Chrome does nothing,
but FF triggers ContentObserver handler.

diff --git a/src/editor/modules/documentCanvas/canvas/wlxmlListener.js b/src/editor/modules/documentCanvas/canvas/wlxmlListener.js
index ce9de6d..80da027 100644 (file)
--- a/src/editor/modules/documentCanvas/canvas/wlxmlListener.js
+++ b/src/editor/modules/documentCanvas/canvas/wlxmlListener.js
@@ -73,7 +73,9 @@ var handlers = {
         if(toSet === '') {
             toSet = utils.unicode.ZWS;
         }
-        canvasElement.setText(toSet);
+        if(toSet !== canvasElement.getText()) {
+            canvasElement.setText(toSet);
+        }
     }
 };