text: ﻿/*
  Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
  For licensing, see LICENSE.html or http://ckeditor.com/license
  */
  
  /**
   * @fileOverview Defines the {@link CKEDITOR.dom.element} class, which
   *		represents a DOM element.
   */
  
  /**
   * Represents a DOM element.
   * @constructor
   * @augments CKEDITOR.dom.node
   * @param {Object|String} element A native DOM element or the element name for
   *		new elements.
   * @param {CKEDITOR.dom.document} [ownerDocument] The document that will contain
   *		the element in case of element creation.
   * @example
   * // Create a new &lt;span&gt; element.
   * var element = new CKEDITOR.dom.element( 'span' );
   * @example
   * // Create an element based on a native DOM element.
   * var element = new CKEDITOR.dom.element( document.getElementById( 'myId' ) );
   */
  CKEDITOR.dom.element = function( element, ownerDocument )
  {
  	if ( typeof element == 'string' )
  		element = ( ownerDocument ? ownerDocument.$ : document ).createElement( element );
  
  	// Call the base constructor (we must not call CKEDITOR.dom.node).
  	CKEDITOR.dom.domObject.call( this, element );
  };
  
  // PACKAGER_RENAME( CKEDITOR.dom.element )
  
  /**
   * The the {@link CKEDITOR.dom.element} representing and element. If the
   * element is a native DOM element, it will be transformed into a valid
   * CKEDITOR.dom.element object.
   * @returns {CKEDITOR.dom.element} The transformed element.
   * @example
   * var element = new CKEDITOR.dom.element( 'span' );
   * alert( element == <b>CKEDITOR.dom.element.get( element )</b> );  "true"
   * @example
   * var element = document.getElementById( 'myElement' );
   * alert( <b>CKEDITOR.dom.element.get( element )</b>.getName() );  e.g. "p"
   */
  CKEDITOR.dom.element.get = function( element )
  {
  	return element && ( element.$ ? element : new CKEDITOR.dom.element( element ) );
  };
  
  CKEDITOR.dom.element.prototype = new CKEDITOR.dom.node();
  
  /**
   * Creates an instance of the {@link CKEDITOR.dom.element} class based on the
   * HTML representation of an element.
   * @param {String} html The element HTML. It should define only one element in
   *		the "root" level. The "root" element can have child nodes, but not
   *		siblings.
   * @returns {CKEDITOR.dom.element} The element instance.
   * @example
   * var element = <b>CKEDITOR.dom.element.createFromHtml( '&lt;strong class="anyclass"&gt;My element&lt;/strong&gt;' )</b>;
   * alert( element.getName() );  // "strong"
   */
  CKEDITOR.dom.element.createFromHtml = function( html, ownerDocument )
  {
  	var temp = new CKEDITOR.dom.element( 'div', ownerDocument );
  	temp.setHtml( html );
  
  	// When returning the node, remove it from its parent to detach it.
  	return temp.getFirst().remove();
  };
  
  CKEDITOR.dom.element.setMarker = function( database, element, name, value )
  {
  	var id = element.getCustomData( 'list_marker_id' ) ||
  			( element.setCustomData( 'list_marker_id', CKEDITOR.tools.getNextNumber() ).getCustomData( 'list_marker_id' ) ),
  		markerNames = element.getCustomData( 'list_marker_names' ) ||
  			( element.setCustomData( 'list_marker_names', {} ).getCustomData( 'list_marker_names' ) );
  	database[id] = element;
  	markerNames[name] = 1;
  
  	return element.setCustomData( name, value );
  };
  
  CKEDITOR.dom.element.clearAllMarkers = function( database )
  {
  	for ( var i in database )
  		CKEDITOR.dom.element.clearMarkers( database, database[i], 1 );
  };
  
  CKEDITOR.dom.element.clearMarkers = function( database, element, removeFromDatabase )
  {
  	var names = element.getCustomData( 'list_marker_names' ),
  		id = element.getCustomData( 'list_marker_id' );
  	for ( var i in names )
  		element.removeCustomData( i );
  	element.removeCustomData( 'list_marker_names' );
  	if ( removeFromDatabase )
  	{
  		element.removeCustomData( 'list_marker_id' );
  		delete database[id];
  	}
  };
  
  CKEDITOR.tools.extend( CKEDITOR.dom.element.prototype,
  	/** @lends CKEDITOR.dom.element.prototype */
  	{
  		/**
  		 * The node type. This is a constant value set to
  		 * {@link CKEDITOR.NODE_ELEMENT}.
  		 * @type Number
  		 * @example
  		 */
  		type : CKEDITOR.NODE_ELEMENT,
  
  		/**
  		 * Adds a CSS class to the element. It appends the class to the
  		 * already existing names.
  		 * @param {String} className The name of the class to be added.
  		 * @example
  		 * var element = new CKEDITOR.dom.element( 'div' );
  		 * element.addClass( 'classA' );  // &lt;div class="classA"&gt;
  		 * element.addClass( 'classB' );  // &lt;div class="classA classB"&gt;
  		 * element.addClass( 'classA' );  // &lt;div class="classA classB"&gt;
  		 */
  		addClass : function( className )
  		{
  			var c = this.$.className;
  			if ( c )
  			{
  				var regex = new RegExp( '(?:^|\\s)' + className + '(?:\\s|$)', '' );
  				if ( !regex.test( c ) )
  					c += ' ' + className;
  			}
  			this.$.className = c || className;
  		},
  
  		/**
  		 * Removes a CSS class name from the elements classes. Other classes
  		 * remain untouched.
  		 * @param {String} className The name of the class to remove.
  		 * @example
  		 * var element = new CKEDITOR.dom.element( 'div' );
  		 * element.addClass( 'classA' );  // &lt;div class="classA"&gt;
  		 * element.addClass( 'classB' );  // &lt;div class="classA classB"&gt;
  		 * element.removeClass( 'classA' );  // &lt;div class="classB"&gt;
  		 * element.removeClass( 'classB' );  // &lt;div&gt;
  		 */
  		removeClass : function( className )
  		{
  			var c = this.getAttribute( 'class' );
  			if ( c )
  			{
  				var regex = new RegExp( '(?:^|\\s+)' + className + '(?=\\s|$)', 'i' );
  				if ( regex.test( c ) )
  				{
  					c = c.replace( regex, '' ).replace( /^\s+/, '' );
  
  					if ( c )
  						this.setAttribute( 'class', c );
  					else
  						this.removeAttribute( 'class' );
  				}
  			}
  		},
  
  		hasClass : function( className )
  		{
  			var regex = new RegExp( '(?:^|\\s+)' + className + '(?=\\s|$)', '' );
  			return regex.test( this.getAttribute('class') );
  		},
  
  		/**
  		 * Append a node as a child of this element.
  		 * @param {CKEDITOR.dom.node|String} node The node or element name to be
  		 *		appended.
  		 * @param {Boolean} [toStart] Indicates that the element is to be
  		 *		appended at the start.
  		 * @returns {CKEDITOR.dom.node} The appended node.
  		 * @example
  		 * var p = new CKEDITOR.dom.element( 'p' );
  		 *
  		 * var strong = new CKEDITOR.dom.element( 'strong' );
  		 * <b>p.append( strong );</b>
  		 *
  		 * var em = <b>p.append( 'em' );</b>
  		 *
  		 * // result: "&lt;p&gt;&lt;strong&gt;&lt;/strong&gt;&lt;em&gt;&lt;/em&gt;&lt;/p&gt;"
  		 */
  		append : function( node, toStart )
  		{
  			if ( typeof node == 'string' )
  				node = this.getDocument().createElement( node );
  
  			if ( toStart )
  				this.$.insertBefore( node.$, this.$.firstChild );
  			else
  				this.$.appendChild( node.$ );
  
  			return node;
  		},
  
  		appendHtml : function( html )
  		{
  			if ( !this.$.childNodes.length )
  				this.setHtml( html );
  			else
  			{
  				var temp = new CKEDITOR.dom.element( 'div', this.getDocument() );
  				temp.setHtml( html );
  				temp.moveChildren( this );
  			}
  		},
  
  		/**
  		 * Append text to this element.
  		 * @param {String} text The text to be appended.
  		 * @returns {CKEDITOR.dom.node} The appended node.
  		 * @example
  		 * var p = new CKEDITOR.dom.element( 'p' );
  		 * p.appendText( 'This is' );
  		 * p.appendText( ' some text' );
  		 *
  		 * // result: "&lt;p&gt;This is some text&lt;/p&gt;"
  		 */
  		appendText : function( text )
  		{
  			if ( this.$.text != undefined )
  				this.$.text += text;
  			else
  				this.append( new CKEDITOR.dom.text( text ) );
  		},
  
  		appendBogus : function()
  		{
  			var lastChild = this.getLast() ;
  
  			// Ignore empty/spaces text.
  			while ( lastChild && lastChild.type == CKEDITOR.NODE_TEXT && !CKEDITOR.tools.rtrim( lastChild.getText() ) )
  				lastChild = lastChild.getPrevious();
  			if ( !lastChild || !lastChild.is || !lastChild.is( 'br' ) )
  			{
  				var bogus = CKEDITOR.env.opera ?
  						this.getDocument().createText('') :
  						this.getDocument().createElement( 'br' );
  
  				CKEDITOR.env.gecko && bogus.setAttribute( 'type', '_moz' );
  
  				this.append( bogus );
  			}
  		},
  
  		/**
  		 * Breaks one of the ancestor element in the element position, moving
  		 * this element between the broken parts.
  		 * @param {CKEDITOR.dom.element} parent The anscestor element to get broken.
  		 * @example
  		 * // Before breaking:
  		 * //     &lt;b&gt;This &lt;i&gt;is some&lt;span /&gt; sample&lt;/i&gt; test text&lt;/b&gt;
  		 * // If "element" is &lt;span /&gt; and "parent" is &lt;i&gt;:
  		 * //     &lt;b&gt;This &lt;i&gt;is some&lt;/i&gt;&lt;span /&gt;&lt;i&gt; sample&lt;/i&gt; test text&lt;/b&gt;
  		 * element.breakParent( parent );
  		 * @example
  		 * // Before breaking:
  		 * //     &lt;b&gt;This &lt;i&gt;is some&lt;span /&gt; sample&lt;/i&gt; test text&lt;/b&gt;
  		 * // If "element" is &lt;span /&gt; and "parent" is &lt;b&gt;:
  		 * //     &lt;b&gt;This &lt;i&gt;is some&lt;/i&gt;&lt;/b&gt;&lt;span /&gt;&lt;b&gt;&lt;i&gt; sample&lt;/i&gt; test text&lt;/b&gt;
  		 * element.breakParent( parent );
  		 */
  		breakParent : function( parent )
  		{
  			var range = new CKEDITOR.dom.range( this.getDocument() );
  
  			// We'll be extracting part of this element, so let's use our
  			// range to get the correct piece.
  			range.setStartAfter( this );
  			range.setEndAfter( parent );
  
  			// Extract it.
  			var docFrag = range.extractContents();
  
  			// Move the element outside the broken element.
  			range.insertNode( this.remove() );
  
  			// Re-insert the extracted piece after the element.
  			docFrag.insertAfterNode( this );
  		},
  
  		contains :
  			CKEDITOR.env.ie || CKEDITOR.env.webkit ?
  				function( node )
  				{
  					var $ = this.$;
  
  					return node.type != CKEDITOR.NODE_ELEMENT ?
  						$.contains( node.getParent().$ ) :
  						$ != node.$ && $.contains( node.$ );
  				}
  			:
  				function( node )
  				{
  					return !!( this.$.compareDocumentPosition( node.$ ) & 16 );
  				},
  
  		/**
  		 * Moves the selection focus to this element.
  		 * @function
  		 * @param  {Boolean} defer Whether to asynchronously defer the
  		 * 		execution by 100 ms.
  		 * @example
  		 * var element = CKEDITOR.document.getById( 'myTextarea' );
  		 * <b>element.focus()</b>;
  		 */
  		focus : ( function()
  		{
  			function exec()
  			{
  			// IE throws error if the element is not visible.
  			try
  			{
  				this.$.focus();
  			}
  			catch (e)
  			{}
  			}
  
  			return function( defer )
  			{
  				if ( defer )
  					CKEDITOR.tools.setTimeout( exec, 100, this );
  				else
  					exec.call( this );
  			};
  		})(),
  
  		/**
  		 * Gets the inner HTML of this element.
  		 * @returns {String} The inner HTML of this element.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;div&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/div&gt;' );
  		 * alert( <b>p.getHtml()</b> );  // "&lt;b&gt;Example&lt;/b&gt;"
  		 */
  		getHtml : function()
  		{
  			var retval = this.$.innerHTML;
  			// Strip <?xml:namespace> tags in IE. (#3341).
  			return CKEDITOR.env.ie ? retval.replace( /<\?[^>]*>/g, '' ) : retval;
  		},
  
  		getOuterHtml : function()
  		{
  			if ( this.$.outerHTML )
  			{
  				// IE includes the <?xml:namespace> tag in the outerHTML of
  				// namespaced element. So, we must strip it here. (#3341)
  				return this.$.outerHTML.replace( /<\?[^>]*>/, '' );
  			}
  
  			var tmpDiv = this.$.ownerDocument.createElement( 'div' );
  			tmpDiv.appendChild( this.$.cloneNode( true ) );
  			return tmpDiv.innerHTML;
  		},
  
  		/**
  		 * Sets the inner HTML of this element.
  		 * @param {String} html The HTML to be set for this element.
  		 * @returns {String} The inserted HTML.
  		 * @example
  		 * var p = new CKEDITOR.dom.element( 'p' );
  		 * <b>p.setHtml( '&lt;b&gt;Inner&lt;/b&gt; HTML' );</b>
  		 *
  		 * // result: "&lt;p&gt;&lt;b&gt;Inner&lt;/b&gt; HTML&lt;/p&gt;"
  		 */
  		setHtml : function( html )
  		{
  			return ( this.$.innerHTML = html );
  		},
  
  		/**
  		 * Sets the element contents as plain text.
  		 * @param {String} text The text to be set.
  		 * @returns {String} The inserted text.
  		 * @example
  		 * var element = new CKEDITOR.dom.element( 'div' );
  		 * element.setText( 'A > B & C < D' );
  		 * alert( element.innerHTML );  // "A &amp;gt; B &amp;amp; C &amp;lt; D"
  		 */
  		setText : function( text )
  		{
  			CKEDITOR.dom.element.prototype.setText = ( this.$.innerText != undefined ) ?
  				function ( text )
  				{
  					return this.$.innerText = text;
  				} :
  				function ( text )
  				{
  					return this.$.textContent = text;
  				};
  
  			return this.setText( text );
  		},
  
  		/**
  		 * Gets the value of an element attribute.
  		 * @function
  		 * @param {String} name The attribute name.
  		 * @returns {String} The attribute value or null if not defined.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;input type="text" /&gt;' );
  		 * alert( <b>element.getAttribute( 'type' )</b> );  // "text"
  		 */
  		getAttribute : (function()
  		{
  			var standard = function( name )
  			{
  				return this.$.getAttribute( name, 2 );
  			};
  
  			if ( CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.ie6Compat ) )
  			{
  				return function( name )
  				{
  					switch ( name )
  					{
  						case 'class':
  							name = 'className';
  							break;
  
  						case 'tabindex':
  							var tabIndex = standard.call( this, name );
  
  							// IE returns tabIndex=0 by default for all
  							// elements. For those elements,
  							// getAtrribute( 'tabindex', 2 ) returns 32768
  							// instead. So, we must make this check to give a
  							// uniform result among all browsers.
  							if ( tabIndex !== 0 && this.$.tabIndex === 0 )
  								tabIndex = null;
  
  							return tabIndex;
  							break;
  
  						case 'checked':
  						{
  							var attr = this.$.attributes.getNamedItem( name ),
  								attrValue = attr.specified ? attr.nodeValue     // For value given by parser.
  															 : this.$.checked;  // For value created via DOM interface.
  
  							return attrValue ? 'checked' : null;
  						}
  
  						case 'hspace':
  						case 'value':
  							return this.$[ name ];
  
  						case 'style':
  							// IE does not return inline styles via getAttribute(). See #2947.
  							return this.$.style.cssText;
  					}
  
  					return standard.call( this, name );
  				};
  			}
  			else
  				return standard;
  		})(),
  
  		getChildren : function()
  		{
  			return new CKEDITOR.dom.nodeList( this.$.childNodes );
  		},
  
  		/**
  		 * Gets the current computed value of one of the element CSS style
  		 * properties.
  		 * @function
  		 * @param {String} propertyName The style property name.
  		 * @returns {String} The property value.
  		 * @example
  		 * var element = new CKEDITOR.dom.element( 'span' );
  		 * alert( <b>element.getComputedStyle( 'display' )</b> );  // "inline"
  		 */
  		getComputedStyle :
  			CKEDITOR.env.ie ?
  				function( propertyName )
  				{
  					return this.$.currentStyle[ CKEDITOR.tools.cssStyleToDomStyle( propertyName ) ];
  				}
  			:
  				function( propertyName )
  				{
  					return this.getWindow().$.getComputedStyle( this.$, '' ).getPropertyValue( propertyName );
  				},
  
  		/**
  		 * Gets the DTD entries for this element.
  		 * @returns {Object} An object containing the list of elements accepted
  		 *		by this element.
  		 */
  		getDtd : function()
  		{
  			var dtd = CKEDITOR.dtd[ this.getName() ];
  
  			this.getDtd = function()
  			{
  				return dtd;
  			};
  
  			return dtd;
  		},
  
  		getElementsByTag : CKEDITOR.dom.document.prototype.getElementsByTag,
  
  		/**
  		 * Gets the computed tabindex for this element.
  		 * @function
  		 * @returns {Number} The tabindex value.
  		 * @example
  		 * var element = CKEDITOR.document.getById( 'myDiv' );
  		 * alert( <b>element.getTabIndex()</b> );  // e.g. "-1"
  		 */
  		getTabIndex :
  			CKEDITOR.env.ie ?
  				function()
  				{
  					var tabIndex = this.$.tabIndex;
  
  					// IE returns tabIndex=0 by default for all elements. In
  					// those cases we must check that the element really has
  					// the tabindex attribute set to zero, or it is one of
  					// those element that should have zero by default.
  					if ( tabIndex === 0 && !CKEDITOR.dtd.$tabIndex[ this.getName() ] && parseInt( this.getAttribute( 'tabindex' ), 10 ) !== 0 )
  						tabIndex = -1;
  
  						return tabIndex;
  				}
  			: CKEDITOR.env.webkit ?
  				function()
  				{
  					var tabIndex = this.$.tabIndex;
  
  					// Safari returns "undefined" for elements that should not
  					// have tabindex (like a div). So, we must try to get it
  					// from the attribute.
  					// https://bugs.webkit.org/show_bug.cgi?id=20596
  					if ( tabIndex == undefined )
  					{
  						tabIndex = parseInt( this.getAttribute( 'tabindex' ), 10 );
  
  						// If the element don't have the tabindex attribute,
  						// then we should return -1.
  						if ( isNaN( tabIndex ) )
  							tabIndex = -1;
  					}
  
  					return tabIndex;
  				}
  			:
  				function()
  				{
  					return this.$.tabIndex;
  				},
  
  		/**
  		 * Gets the text value of this element.
  		 *
  		 * Only in IE (which uses innerText), &lt;br&gt; will cause linebreaks,
  		 * and sucessive whitespaces (including line breaks) will be reduced to
  		 * a single space. This behavior is ok for us, for now. It may change
  		 * in the future.
  		 * @returns {String} The text value.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;div&gt;Same &lt;i&gt;text&lt;/i&gt;.&lt;/div&gt;' );
  		 * alert( <b>element.getText()</b> );  // "Sample text."
  		 */
  		getText : function()
  		{
  			return this.$.textContent || this.$.innerText || '';
  		},
  
  		/**
  		 * Gets the window object that contains this element.
  		 * @returns {CKEDITOR.dom.window} The window object.
  		 * @example
  		 */
  		getWindow : function()
  		{
  			return this.getDocument().getWindow();
  		},
  
  		/**
  		 * Gets the value of the "id" attribute of this element.
  		 * @returns {String} The element id, or null if not available.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;p id="myId"&gt;&lt;/p&gt;' );
  		 * alert( <b>element.getId()</b> );  // "myId"
  		 */
  		getId : function()
  		{
  			return this.$.id || null;
  		},
  
  		/**
  		 * Gets the value of the "name" attribute of this element.
  		 * @returns {String} The element name, or null if not available.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;input name="myName"&gt;&lt;/input&gt;' );
  		 * alert( <b>element.getNameAtt()</b> );  // "myName"
  		 */
  		getNameAtt : function()
  		{
  			return this.$.name || null;
  		},
  
  		/**
  		 * Gets the element name (tag name). The returned name is guaranteed to
  		 * be always full lowercased.
  		 * @returns {String} The element name.
  		 * @example
  		 * var element = new CKEDITOR.dom.element( 'span' );
  		 * alert( <b>element.getName()</b> );  // "span"
  		 */
  		getName : function()
  		{
  			// Cache the lowercased name inside a closure.
  			var nodeName = this.$.nodeName.toLowerCase();
  
  			if ( CKEDITOR.env.ie && ! ( document.documentMode > 8 ) )
  			{
  				var scopeName = this.$.scopeName;
  				if ( scopeName != 'HTML' )
  					nodeName = scopeName.toLowerCase() + ':' + nodeName;
  			}
  
  			return (
  			this.getName = function()
  				{
  					return nodeName;
  				})();
  		},
  
  		/**
  		 * Gets the value set to this element. This value is usually available
  		 * for form field elements.
  		 * @returns {String} The element value.
  		 */
  		getValue : function()
  		{
  			return this.$.value;
  		},
  
  		/**
  		 * Gets the first child node of this element.
  		 * @param {Function} evaluator Filtering the result node.
  		 * @returns {CKEDITOR.dom.node} The first child node or null if not
  		 *		available.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;div&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/div&gt;' );
  		 * var first = <b>element.getFirst()</b>;
  		 * alert( first.getName() );  // "b"
  		 */
  		getFirst : function( evaluator )
  		{
  			var first = this.$.firstChild,
  				retval = first && new CKEDITOR.dom.node( first );
  			if ( retval && evaluator && !evaluator( retval ) )
  				retval = retval.getNext( evaluator );
  
  			return retval;
  		},
  
  		/**
  		 * @param {Function} evaluator Filtering the result node.
  		 */
  		getLast : function( evaluator )
  		{
  			var last = this.$.lastChild,
  				retval = last && new CKEDITOR.dom.node( last );
  			if ( retval && evaluator && !evaluator( retval ) )
  				retval = retval.getPrevious( evaluator );
  
  			return retval;
  		},
  
  		getStyle : function( name )
  		{
  			return this.$.style[ CKEDITOR.tools.cssStyleToDomStyle( name ) ];
  		},
  
  		/**
  		 * Checks if the element name matches one or more names.
  		 * @param {String} name[,name[,...]] One or more names to be checked.
  		 * @returns {Boolean} true if the element name matches any of the names.
  		 * @example
  		 * var element = new CKEDITOR.element( 'span' );
  		 * alert( <b>element.is( 'span' )</b> );  "true"
  		 * alert( <b>element.is( 'p', 'span' )</b> );  "true"
  		 * alert( <b>element.is( 'p' )</b> );  "false"
  		 * alert( <b>element.is( 'p', 'div' )</b> );  "false"
  		 */
  		is : function()
  		{
  			var name = this.getName();
  			for ( var i = 0 ; i < arguments.length ; i++ )
  			{
  				if ( arguments[ i ] == name )
  					return true;
  			}
  			return false;
  		},
  
  		isEditable : function()
  		{
  			// Get the element name.
  			var name = this.getName();
  
  			// Get the element DTD (defaults to span for unknown elements).
  			var dtd = !CKEDITOR.dtd.$nonEditable[ name ]
  						&& ( CKEDITOR.dtd[ name ] || CKEDITOR.dtd.span );
  
  			// In the DTD # == text node.
  			return ( dtd && dtd['#'] );
  		},
  
  		isIdentical : function( otherElement )
  		{
  			if ( this.getName() != otherElement.getName() )
  				return false;
  
  			var thisAttribs = this.$.attributes,
  				otherAttribs = otherElement.$.attributes;
  
  			var thisLength = thisAttribs.length,
  				otherLength = otherAttribs.length;
  
  			for ( var i = 0 ; i < thisLength ; i++ )
  			{
  				var attribute = thisAttribs[ i ];
  
  				if ( attribute.nodeName == '_moz_dirty' )
  					continue;
  
  				if ( ( !CKEDITOR.env.ie || ( attribute.specified && attribute.nodeName != 'data-cke-expando' ) ) && attribute.nodeValue != otherElement.getAttribute( attribute.nodeName ) )
  					return false;
  			}
  
  			// For IE, we have to for both elements, because it's difficult to
  			// know how the atttibutes collection is organized in its DOM.
  			if ( CKEDITOR.env.ie )
  			{
  				for ( i = 0 ; i < otherLength ; i++ )
  				{
  					attribute = otherAttribs[ i ];
  					if ( attribute.specified && attribute.nodeName != 'data-cke-expando'
  							&& attribute.nodeValue != this.getAttribute( attribute.nodeName ) )
  						return false;
  				}
  			}
  
  			return true;
  		},
  
  		/**
  		 * Checks if this element is visible. May not work if the element is
  		 * child of an element with visibility set to "hidden", but works well
  		 * on the great majority of cases.
  		 * @return {Boolean} True if the element is visible.
  		 */
  		isVisible : function()
  		{
  			var isVisible = !!this.$.offsetHeight && this.getComputedStyle( 'visibility' ) != 'hidden',
  				elementWindow,
  				elementWindowFrame;
  
  			// Webkit and Opera report non-zero offsetHeight despite that
  			// element is inside an invisible iframe. (#4542)
  			if ( isVisible && ( CKEDITOR.env.webkit || CKEDITOR.env.opera ) )
  			{
  				elementWindow = this.getWindow();
  
  				if ( !elementWindow.equals( CKEDITOR.document.getWindow() )
  						&& ( elementWindowFrame = elementWindow.$.frameElement ) )
  				{
  					isVisible = new CKEDITOR.dom.element( elementWindowFrame ).isVisible();
  				}
  			}
  
  			return isVisible;
  		},
  
  		/**
  		 * Whether it's an empty inline elements which has no visual impact when removed.
  		 */
  		isEmptyInlineRemoveable : function()
  		{
  			if ( !CKEDITOR.dtd.$removeEmpty[ this.getName() ] )
  				return false;
  
  			var children = this.getChildren();
  			for ( var i = 0, count = children.count(); i < count; i++ )
  			{
  				var child = children.getItem( i );
  
  				if ( child.type == CKEDITOR.NODE_ELEMENT && child.data( 'cke-bookmark' ) )
  					continue;
  
  				if ( child.type == CKEDITOR.NODE_ELEMENT && !child.isEmptyInlineRemoveable()
  					|| child.type == CKEDITOR.NODE_TEXT && CKEDITOR.tools.trim( child.getText() ) )
  				{
  					return false;
  				}
  			}
  			return true;
  		},
  
  		/**
  		 * Checks if the element has any defined attributes.
  		 * @function
  		 * @returns {Boolean} True if the element has attributes.
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;div title="Test"&gt;Example&lt;/div&gt;' );
  		 * alert( <b>element.hasAttributes()</b> );  // "true"
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '&lt;div&gt;Example&lt;/div&gt;' );
  		 * alert( <b>element.hasAttributes()</b> );  // "false"
  		 */
  		hasAttributes :
  			CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.ie6Compat ) ?
  				function()
  				{
  					var attributes = this.$.attributes;
  
  					for ( var i = 0 ; i < attributes.length ; i++ )
  					{
  						var attribute = attributes[i];
  
  						switch ( attribute.nodeName )
  						{
  							case 'class' :
  								// IE has a strange bug. If calling removeAttribute('className'),
  								// the attributes collection will still contain the "class"
  								// attribute, which will be marked as "specified", even if the
  								// outerHTML of the element is not displaying the class attribute.
  								// Note : I was not able to reproduce it outside the editor,
  								// but I've faced it while working on the TC of #1391.
  								if ( this.getAttribute( 'class' ) )
  									return true;
  
  							// Attributes to be ignored.
  							case 'data-cke-expando' :
  								continue;
  
  							/*jsl:fallthru*/
  
  							default :
  								if ( attribute.specified )
  									return true;
  						}
  					}
  
  					return false;
  				}
  			:
  				function()
  				{
  					var attrs = this.$.attributes,
  						attrsNum = attrs.length;
  
  					// The _moz_dirty attribute might get into the element after pasting (#5455)
  					var execludeAttrs = { 'data-cke-expando' : 1, _moz_dirty : 1 };
  
  					return attrsNum > 0 &&
  						( attrsNum > 2 ||
  							!execludeAttrs[ attrs[0].nodeName ] ||
  							( attrsNum == 2 && !execludeAttrs[ attrs[1].nodeName ] ) );
  				},
  
  		/**
  		 * Checks if the specified attribute is defined for this element.
  		 * @returns {Boolean} True if the specified attribute is defined.
  		 * @param {String} name The attribute name.
  		 * @example
  		 */
  		hasAttribute : function( name )
  		{
  			var $attr = this.$.attributes.getNamedItem( name );
  			return !!( $attr && $attr.specified );
  		},
  
  		/**
  		 * Hides this element (display:none).
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.hide()</b>;
  		 */
  		hide : function()
  		{
  			this.setStyle( 'display', 'none' );
  		},
  
  		moveChildren : function( target, toStart )
  		{
  			var $ = this.$;
  			target = target.$;
  
  			if ( $ == target )
  				return;
  
  			var child;
  
  			if ( toStart )
  			{
  				while ( ( child = $.lastChild ) )
  					target.insertBefore( $.removeChild( child ), target.firstChild );
  			}
  			else
  			{
  				while ( ( child = $.firstChild ) )
  					target.appendChild( $.removeChild( child ) );
  			}
  		},
  
  		/**
  		 * Merges sibling elements that are identical to this one.<br>
  		 * <br>
  		 * Identical child elements are also merged. For example:<br>
  		 * &lt;b&gt;&lt;i&gt;&lt;/i&gt;&lt;/b&gt;&lt;b&gt;&lt;i&gt;&lt;/i&gt;&lt;/b&gt; =&gt; &lt;b&gt;&lt;i&gt;&lt;/i&gt;&lt;/b&gt;
  		 * @function
  		 * @param {Boolean} [inlineOnly] Allow only inline elements to be merged. Defaults to "true".
  		 */
  		mergeSiblings : ( function()
  		{
  			function mergeElements( element, sibling, isNext )
  			{
  				if ( sibling && sibling.type == CKEDITOR.NODE_ELEMENT )
  				{
  					// Jumping over bookmark nodes and empty inline elements, e.g. <b><i></i></b>,
  					// queuing them to be moved later. (#5567)
  					var pendingNodes = [];
  
  					while ( sibling.data( 'cke-bookmark' )
  						|| sibling.isEmptyInlineRemoveable() )
  					{
  						pendingNodes.push( sibling );
  						sibling = isNext ? sibling.getNext() : sibling.getPrevious();
  						if ( !sibling || sibling.type != CKEDITOR.NODE_ELEMENT )
  							return;
  					}
  
  					if ( element.isIdentical( sibling ) )
  					{
  						// Save the last child to be checked too, to merge things like
  						// <b><i></i></b><b><i></i></b> => <b><i></i></b>
  						var innerSibling = isNext ? element.getLast() : element.getFirst();
  
  						// Move pending nodes first into the target element.
  						while( pendingNodes.length )
  							pendingNodes.shift().move( element, !isNext );
  
  						sibling.moveChildren( element, !isNext );
  						sibling.remove();
  
  						// Now check the last inner child (see two comments above).
  						if ( innerSibling && innerSibling.type == CKEDITOR.NODE_ELEMENT )
  							innerSibling.mergeSiblings();
  					}
  				}
  			}
  
  			return function( inlineOnly )
  				{
  					if ( ! ( inlineOnly === false
  							|| CKEDITOR.dtd.$removeEmpty[ this.getName() ]
  							|| this.is( 'a' ) ) )	// Merge empty links and anchors also. (#5567)
  					{
  						return;
  					}
  
  					mergeElements( this, this.getNext(), true );
  					mergeElements( this, this.getPrevious() );
  				};
  		} )(),
  
  		/**
  		 * Shows this element (display it).
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.show()</b>;
  		 */
  		show : function()
  		{
  			this.setStyles(
  				{
  					display : '',
  					visibility : ''
  				});
  		},
  
  		/**
  		 * Sets the value of an element attribute.
  		 * @param {String} name The name of the attribute.
  		 * @param {String} value The value to be set to the attribute.
  		 * @function
  		 * @returns {CKEDITOR.dom.element} This element instance.
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.setAttribute( 'class', 'myClass' )</b>;
  		 * <b>element.setAttribute( 'title', 'This is an example' )</b>;
  		 */
  		setAttribute : (function()
  		{
  			var standard = function( name, value )
  			{
  				this.$.setAttribute( name, value );
  				return this;
  			};
  
  			if ( CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.ie6Compat ) )
  			{
  				return function( name, value )
  				{
  					if ( name == 'class' )
  						this.$.className = value;
  					else if ( name == 'style' )
  						this.$.style.cssText = value;
  					else if ( name == 'tabindex' )	// Case sensitive.
  						this.$.tabIndex = value;
  					else if ( name == 'checked' )
  						this.$.checked = value;
  					else
  						standard.apply( this, arguments );
  					return this;
  				};
  			}
  			else
  				return standard;
  		})(),
  
  		/**
  		 * Sets the value of several element attributes.
  		 * @param {Object} attributesPairs An object containing the names and
  		 *		values of the attributes.
  		 * @returns {CKEDITOR.dom.element} This element instance.
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.setAttributes({
  		 *     'class' : 'myClass',
  		 *     'title' : 'This is an example' })</b>;
  		 */
  		setAttributes : function( attributesPairs )
  		{
  			for ( var name in attributesPairs )
  				this.setAttribute( name, attributesPairs[ name ] );
  			return this;
  		},
  
  		/**
  		 * Sets the element value. This function is usually used with form
  		 * field element.
  		 * @param {String} value The element value.
  		 * @returns {CKEDITOR.dom.element} This element instance.
  		 */
  		setValue : function( value )
  		{
  			this.$.value = value;
  			return this;
  		},
  
  		/**
  		 * Removes an attribute from the element.
  		 * @param {String} name The attribute name.
  		 * @function
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '<div class="classA"></div>' );
  		 * element.removeAttribute( 'class' );
  		 */
  		removeAttribute : (function()
  		{
  			var standard = function( name )
  			{
  				this.$.removeAttribute( name );
  			};
  
  			if ( CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.ie6Compat ) )
  			{
  				return function( name )
  				{
  					if ( name == 'class' )
  						name = 'className';
  					else if ( name == 'tabindex' )
  						name = 'tabIndex';
  					standard.call( this, name );
  				};
  			}
  			else
  				return standard;
  		})(),
  
  		removeAttributes : function ( attributes )
  		{
  			if ( CKEDITOR.tools.isArray( attributes ) )
  			{
  				for ( var i = 0 ; i < attributes.length ; i++ )
  					this.removeAttribute( attributes[ i ] );
  			}
  			else
  			{
  				for ( var attr in attributes )
  					attributes.hasOwnProperty( attr ) && this.removeAttribute( attr );
  			}
  		},
  
  		/**
  		 * Removes a style from the element.
  		 * @param {String} name The style name.
  		 * @function
  		 * @example
  		 * var element = CKEDITOR.dom.element.createFromHtml( '<div style="display:none"></div>' );
  		 * element.removeStyle( 'display' );
  		 */
  		removeStyle : function( name )
  		{
  			this.setStyle( name, '' );
  			if ( this.$.style.removeAttribute )
  				this.$.style.removeAttribute( CKEDITOR.tools.cssStyleToDomStyle( name ) );
  
  			if ( !this.$.style.cssText )
  				this.removeAttribute( 'style' );
  		},
  
  		/**
  		 * Sets the value of an element style.
  		 * @param {String} name The name of the style. The CSS naming notation
  		 *		must be used (e.g. "background-color").
  		 * @param {String} value The value to be set to the style.
  		 * @returns {CKEDITOR.dom.element} This element instance.
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.setStyle( 'background-color', '#ff0000' )</b>;
  		 * <b>element.setStyle( 'margin-top', '10px' )</b>;
  		 * <b>element.setStyle( 'float', 'right' )</b>;
  		 */
  		setStyle : function( name, value )
  		{
  			this.$.style[ CKEDITOR.tools.cssStyleToDomStyle( name ) ] = value;
  			return this;
  		},
  
  		/**
  		 * Sets the value of several element styles.
  		 * @param {Object} stylesPairs An object containing the names and
  		 *		values of the styles.
  		 * @returns {CKEDITOR.dom.element} This element instance.
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.setStyles({
  		 *     'position' : 'absolute',
  		 *     'float' : 'right' })</b>;
  		 */
  		setStyles : function( stylesPairs )
  		{
  			for ( var name in stylesPairs )
  				this.setStyle( name, stylesPairs[ name ] );
  			return this;
  		},
  
  		/**
  		 * Sets the opacity of an element.
  		 * @param {Number} opacity A number within the range [0.0, 1.0].
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * <b>element.setOpacity( 0.75 )</b>;
  		 */
  		setOpacity : function( opacity )
  		{
  			if ( CKEDITOR.env.ie )
  			{
  				opacity = Math.round( opacity * 100 );
  				this.setStyle( 'filter', opacity >= 100 ? '' : 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + opacity + ')' );
  			}
  			else
  				this.setStyle( 'opacity', opacity );
  		},
  
  		/**
  		 * Makes the element and its children unselectable.
  		 * @function
  		 * @example
  		 * var element = CKEDITOR.dom.element.getById( 'myElement' );
  		 * element.unselectable();
  		 */
  		unselectable :
  			CKEDITOR.env.gecko ?
  				function()
  				{
  					this.$.style.MozUserSelect = 'none';
  					this.on( 'dragstart', function( evt ) { evt.data.preventDefault(); } );
  				}
  			: CKEDITOR.env.webkit ?
  				function()
  				{
  					this.$.style.KhtmlUserSelect = 'none';
  					this.on( 'dragstart', function( evt ) { evt.data.preventDefault(); } );
  				}
  			:
  				function()
  				{
  					if ( CKEDITOR.env.ie || CKEDITOR.env.opera )
  					{
  						var element = this.$,
  							e,
  							i = 0;
  
  						element.unselectable = 'on';
  
  						while ( ( e = element.all[ i++ ] ) )
  						{
  							switch ( e.tagName.toLowerCase() )
  							{
  								case 'iframe' :
  								case 'textarea' :
  								case 'input' :
  								case 'select' :
  									/* Ignore the above tags */
  									break;
  								default :
  									e.unselectable = 'on';
  							}
  						}
  					}
  				},
  
  		getPositionedAncestor : function()
  		{
  			var current = this;
  			while ( current.getName() != 'html' )
  			{
  				if ( current.getComputedStyle( 'position' ) != 'static' )
  					return current;
  
  				current = current.getParent();
  			}
  			return null;
  		},
  
  		getDocumentPosition : function( refDocument )
  		{
  			var x = 0, y = 0,
  				body = this.getDocument().getBody(),
  				quirks = this.getDocument().$.compatMode == 'BackCompat';
  
  			var doc = this.getDocument();
  
  			if ( document.documentElement[ "getBoundingClientRect" ] )
  			{
  				var box  = this.$.getBoundingClientRect(),
  					$doc = doc.$,
  					$docElem = $doc.documentElement;
  
  				var clientTop = $docElem.clientTop || body.$.clientTop || 0,
  					clientLeft = $docElem.clientLeft || body.$.clientLeft || 0,
  					needAdjustScrollAndBorders = true;
  
  				/*
  				 * #3804: getBoundingClientRect() works differently on IE and non-IE
  				 * browsers, regarding scroll positions.
  				 *
  				 * On IE, the top position of the <html> element is always 0, no matter
  				 * how much you scrolled down.
  				 *
  				 * On other browsers, the top position of the <html> element is negative
  				 * scrollTop.
  				 */
  				if ( CKEDITOR.env.ie )
  				{
  					var inDocElem = doc.getDocumentElement().contains( this ),
  						inBody = doc.getBody().contains( this );
  
  					needAdjustScrollAndBorders = ( quirks && inBody ) || ( !quirks && inDocElem );
  				}
  
  				if ( needAdjustScrollAndBorders )
  				{
  					x = box.left + ( !quirks && $docElem.scrollLeft || body.$.scrollLeft );
  					x -= clientLeft;
  					y = box.top  + ( !quirks && $docElem.scrollTop || body.$.scrollTop );
  					y -= clientTop;
  				}
  			}
  			else
   			{
  				var current = this, previous = null, offsetParent;
  				while ( current && !( current.getName() == 'body' || current.getName() == 'html' ) )
  				{
  					x += current.$.offsetLeft - current.$.scrollLeft;
  					y += current.$.offsetTop - current.$.scrollTop;
  
  					// Opera includes clientTop|Left into offsetTop|Left.
  					if ( !current.equals( this ) )
  					{
  						x += ( current.$.clientLeft || 0 );
  						y += ( current.$.clientTop || 0 );
  					}
  
  					var scrollElement = previous;
  					while ( scrollElement && !scrollElement.equals( current ) )
  					{
  						x -= scrollElement.$.scrollLeft;
  						y -= scrollElement.$.scrollTop;
  						scrollElement = scrollElement.getParent();
  					}
  
  					previous = current;
  					current = ( offsetParent = current.$.offsetParent ) ?
  					          new CKEDITOR.dom.element( offsetParent ) : null;
  				}
  			}
  
  			if ( refDocument )
  			{
  				var currentWindow = this.getWindow(),
  					refWindow = refDocument.getWindow();
  
  				if ( !currentWindow.equals( refWindow ) && currentWindow.$.frameElement )
  				{
  					var iframePosition = ( new CKEDITOR.dom.element( currentWindow.$.frameElement ) ).getDocumentPosition( refDocument );
  
  					x += iframePosition.x;
  					y += iframePosition.y;
  				}
  			}
  
  			if ( !document.documentElement[ "getBoundingClientRect" ] )
  			{
  				// In Firefox, we'll endup one pixel before the element positions,
  				// so we must add it here.
  				if ( CKEDITOR.env.gecko && !quirks )
  				{
  					x += this.$.clientLeft ? 1 : 0;
  					y += this.$.clientTop ? 1 : 0;
  				}
  			}
  
  			return { x : x, y : y };
  		},
  
  		scrollIntoView : function( alignTop )
  		{
  			// Get the element window.
  			var win = this.getWindow(),
  				winHeight = win.getViewPaneSize().height;
  
  			// Starts from the offset that will be scrolled with the negative value of
  			// the visible window height.
  			var offset = winHeight * -1;
  
  			// Append the view pane's height if align to top.
  			// Append element height if we are aligning to the bottom.
  			if ( alignTop )
  				offset += winHeight;
  			else
  			{
  				offset += this.$.offsetHeight || 0;
  
  				// Consider the margin in the scroll, which is ok for our current needs, but
  				// needs investigation if we will be using this function in other places.
  				offset += parseInt( this.getComputedStyle( 'marginBottom' ) || 0, 10 ) || 0;
  			}
  
  			// Append the offsets for the entire element hierarchy.
  			var elementPosition = this.getDocumentPosition();
  			offset += elementPosition.y;
  
  			// offset value might be out of range(nagative), fix it(#3692).
  			offset = offset < 0 ? 0 : offset;
  
  			// Scroll the window to the desired position, if not already visible(#3795).
  			var currentScroll = win.getScrollPosition().y;
  			if ( offset > currentScroll || offset < currentScroll - winHeight )
  				win.$.scrollTo( 0, offset );
  		},
  
  		setState : function( state )
  		{
  			switch ( state )
  			{
  				case CKEDITOR.TRISTATE_ON :
  					this.addClass( 'cke_on' );
  					this.removeClass( 'cke_off' );
  					this.removeClass( 'cke_disabled' );
  					break;
  				case CKEDITOR.TRISTATE_DISABLED :
  					this.addClass( 'cke_disabled' );
  					this.removeClass( 'cke_off' );
  					this.removeClass( 'cke_on' );
  					break;
  				default :
  					this.addClass( 'cke_off' );
  					this.removeClass( 'cke_on' );
  					this.removeClass( 'cke_disabled' );
  					break;
  			}
  		},
  
  		/**
  		 * Returns the inner document of this IFRAME element.
  		 * @returns {CKEDITOR.dom.document} The inner document.
  		 */
  		getFrameDocument : function()
  		{
  			var $ = this.$;
  
  			try
  			{
  				// In IE, with custom document.domain, it may happen that
  				// the iframe is not yet available, resulting in "Access
  				// Denied" for the following property access.
  				$.contentWindow.document;
  			}
  			catch ( e )
  			{
  				// Trick to solve this issue, forcing the iframe to get ready
  				// by simply setting its "src" property.
  				$.src = $.src;
  
  				// In IE6 though, the above is not enough, so we must pause the
  				// execution for a while, giving it time to think.
  				if ( CKEDITOR.env.ie && CKEDITOR.env.version < 7 )
  				{
  					window.showModalDialog(
  						'javascript:document.write("' +
  							'<script>' +
  								'window.setTimeout(' +
  									'function(){window.close();}' +
  									',50);' +
  							'</script>")' );
  				}
  			}
  
  			return $ && new CKEDITOR.dom.document( $.contentWindow.document );
  		},
  
  		/**
  		 * Copy all the attributes from one node to the other, kinda like a clone
  		 * skipAttributes is an object with the attributes that must NOT be copied.
  		 * @param {CKEDITOR.dom.element} dest The destination element.
  		 * @param {Object} skipAttributes A dictionary of attributes to skip.
  		 * @example
  		 */
  		copyAttributes : function( dest, skipAttributes )
  		{
  			var attributes = this.$.attributes;
  			skipAttributes = skipAttributes || {};
  
  			for ( var n = 0 ; n < attributes.length ; n++ )
  			{
  				var attribute = attributes[n];
  
  				// Lowercase attribute name hard rule is broken for
  				// some attribute on IE, e.g. CHECKED.
  				var attrName = attribute.nodeName.toLowerCase(),
  					attrValue;
  
  				// We can set the type only once, so do it with the proper value, not copying it.
  				if ( attrName in skipAttributes )
  					continue;
  
  				if ( attrName == 'checked' && ( attrValue = this.getAttribute( attrName ) ) )
  					dest.setAttribute( attrName, attrValue );
  				// IE BUG: value attribute is never specified even if it exists.
  				else if ( attribute.specified ||
  				  ( CKEDITOR.env.ie && attribute.nodeValue && attrName == 'value' ) )
  				{
  					attrValue = this.getAttribute( attrName );
  					if ( attrValue === null )
  						attrValue = attribute.nodeValue;
  
  					dest.setAttribute( attrName, attrValue );
  				}
  			}
  
  			// The style:
  			if ( this.$.style.cssText !== '' )
  				dest.$.style.cssText = this.$.style.cssText;
  		},
  
  		/**
  		 * Changes the tag name of the current element.
  		 * @param {String} newTag The new tag for the element.
  		 */
  		renameNode : function( newTag )
  		{
  			// If it's already correct exit here.
  			if ( this.getName() == newTag )
  				return;
  
  			var doc = this.getDocument();
  
  			// Create the new node.
  			var newNode = new CKEDITOR.dom.element( newTag, doc );
  
  			// Copy all attributes.
  			this.copyAttributes( newNode );
  
  			// Move children to the new node.
  			this.moveChildren( newNode );
  
  			// Replace the node.
  			this.getParent() && this.$.parentNode.replaceChild( newNode.$, this.$ );
  			newNode.$[ 'data-cke-expando' ] = this.$[ 'data-cke-expando' ];
  			this.$ = newNode.$;
  		},
  
  		/**
  		 * Gets a DOM tree descendant under the current node.
  		 * @param {Array|Number} indices The child index or array of child indices under the node.
  		 * @returns {CKEDITOR.dom.node} The specified DOM child under the current node. Null if child does not exist.
  		 * @example
  		 * var strong = p.getChild(0);
  		 */
  		getChild : function( indices )
  		{
  			var rawNode = this.$;
  
  			if ( !indices.slice )
  				rawNode = rawNode.childNodes[ indices ];
  			else
  			{
  				while ( indices.length > 0 && rawNode )
  					rawNode = rawNode.childNodes[ indices.shift() ];
  			}
  
  			return rawNode ? new CKEDITOR.dom.node( rawNode ) : null;
  		},
  
  		getChildCount : function()
  		{
  			return this.$.childNodes.length;
   		},
  
  		disableContextMenu : function()
  		{
  			this.on( 'contextmenu', function( event )
  				{
  					// Cancel the browser context menu.
  					if ( !event.data.getTarget().hasClass( 'cke_enable_context_menu' ) )
  						event.data.preventDefault();
  				} );
  		},
  
  		/**
  		 * Gets element's direction. Supports both CSS 'direction' prop and 'dir' attr.
  		 */
  		getDirection : function( useComputed )
  		{
  			return useComputed ? this.getComputedStyle( 'direction' ) : this.getStyle( 'direction' ) || this.getAttribute( 'dir' );
  		},
  
  		/**
  		 * Gets, sets and removes custom data to be stored as HTML5 data-* attributes.
  		 * @param {String} name The name of the attribute, excluding the 'data-' part.
  		 * @param {String} [value] The value to set. If set to false, the attribute will be removed.
  		 * @example
  		 * element.data( 'extra-info', 'test' );   // appended the attribute data-extra-info="test" to the element
  		 * alert( element.data( 'extra-info' ) );  // "test"
  		 * element.data( 'extra-info', false );    // remove the data-extra-info attribute from the element
  		 */
  		data : function ( name, value )
  		{
  			name = 'data-' + name;
  			if ( value === undefined )
  				return this.getAttribute( name );
  			else if ( value === false )
  				this.removeAttribute( name );
  			else
  				this.setAttribute( name, value );
  
  			return null;
  		}
  	});
  
  ( function()
  {
  	var sides = {
  		width : [ "border-left-width", "border-right-width","padding-left", "padding-right" ],
  		height : [ "border-top-width", "border-bottom-width", "padding-top",  "padding-bottom" ]
  	};
  
  	function marginAndPaddingSize( type )
  	{
  		var adjustment = 0;
  		for ( var i = 0, len = sides[ type ].length; i < len; i++ )
  			adjustment += parseInt( this.getComputedStyle( sides [ type ][ i ] ) || 0, 10 ) || 0;
  		return adjustment;
  	}
  
  	/**
  	 * Sets the element size considering the box model.
  	 * @name CKEDITOR.dom.element.prototype.setSize
  	 * @function
  	 * @param {String} type The dimension to set. It accepts "width" and "height".
  	 * @param {Number} size The length unit in px.
  	 * @param {Boolean} isBorderBox Apply the size based on the border box model.
  	 */
  	CKEDITOR.dom.element.prototype.setSize = function( type, size, isBorderBox )
  		{
  			if ( typeof size == 'number' )
  			{
  				if ( isBorderBox && !( CKEDITOR.env.ie && CKEDITOR.env.quirks ) )
  					size -= marginAndPaddingSize.call( this, type );
  
  				this.setStyle( type, size + 'px' );
  			}
  		};
  
  	/**
  	 * Gets the element size, possibly considering the box model.
  	 * @name CKEDITOR.dom.element.prototype.getSize
  	 * @function
  	 * @param {String} type The dimension to get. It accepts "width" and "height".
  	 * @param {Boolean} isBorderBox Get the size based on the border box model.
  	 */
  	CKEDITOR.dom.element.prototype.getSize = function( type, isBorderBox )
  		{
  			var size = Math.max( this.$[ 'offset' + CKEDITOR.tools.capitalize( type )  ],
  				this.$[ 'client' + CKEDITOR.tools.capitalize( type )  ] ) || 0;
  
  			if ( isBorderBox )
  				size -= marginAndPaddingSize.call( this, type );
  
  			return size;
  		};
  })();
  