Merge branch 't/11972'

Author: Reinmar

CHANGES.md

@@ -24,6 +24,7 @@ Fixed Issues:
 * [#11387](http://dev.ckeditor.com/ticket/11387): Fixed: `role="radiogroup"` should be applied only to radio inputs' container.
 * [#7975](http://dev.ckeditor.com/ticket/7975): [IE8] Fixed: Errors when trying to select empty table cell on IE8.
 * [#11947](http://dev.ckeditor.com/ticket/11947): [FF+IE11] Fixed: Shift+Enter in lists produces two line breaks.
+* [#11972](http://dev.ckeditor.com/ticket/11972): Fixed: Feature detection in the [`element.setText()`](http://docs.ckeditor.com/#!/api/CKEDITOR.dom.element-method-setText) method should not trigger layout engine.
 
 ## CKEditor 4.4.1
 

core/dom/element.js

@@ -469,16 +469,15 @@ CKEDITOR.tools.extend( CKEDITOR.dom.element.prototype, {
 	 * @param {String} text The text to be set.
 	 * @returns {String} The inserted text.
 	 */
-	setText: function( text ) {
-		CKEDITOR.dom.element.prototype.setText = ( this.$.innerText != undefined ) ?
-			function( text ) {
-				return this.$.innerText = text;
-			} : function( text ) {
-				return this.$.textContent = text;
-			};
+	setText: ( function() {
+		var supportsTextContent = document.createElement( 'p' );
+		supportsTextContent.innerHTML = 'x';
+		supportsTextContent = supportsTextContent.textContent;
 
-		return this.setText( text );
-	},
+		return function( text ) {
+			this.$[ supportsTextContent ? 'textContent' : 'innerText' ] = text;
+		};
+	} )(),
 
 	/**
 	 * Gets the value of an element attribute.