text: ﻿/*
  Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
  For licensing, see LICENSE.html or http://ckeditor.com/license
  */
  
  /**
   * @file Insert and remove numbered and bulleted lists.
   */
  
  (function()
  {
  	var listNodeNames = { ol : 1, ul : 1 },
  		emptyTextRegex = /^[\n\r\t ]*$/;
  
  	CKEDITOR.plugins.list = {
  		/*
  		 * Convert a DOM list tree into a data structure that is easier to
  		 * manipulate. This operation should be non-intrusive in the sense that it
  		 * does not change the DOM tree, with the exception that it may add some
  		 * markers to the list item nodes when database is specified.
  		 */
  		listToArray : function( listNode, database, baseArray, baseIndentLevel, grandparentNode )
  		{
  			if ( !listNodeNames[ listNode.getName() ] )
  				return [];
  
  			if ( !baseIndentLevel )
  				baseIndentLevel = 0;
  			if ( !baseArray )
  				baseArray = [];
  
  			// Iterate over all list items to and look for inner lists.
  			for ( var i = 0, count = listNode.getChildCount() ; i < count ; i++ )
  			{
  				var listItem = listNode.getChild( i );
  
  				// It may be a text node or some funny stuff.
  				if ( listItem.$.nodeName.toLowerCase() != 'li' )
  					continue;
  
  				var itemObj = { 'parent' : listNode, indent : baseIndentLevel, element : listItem, contents : [] };
  				if ( !grandparentNode )
  				{
  					itemObj.grandparent = listNode.getParent();
  					if ( itemObj.grandparent && itemObj.grandparent.$.nodeName.toLowerCase() == 'li' )
  						itemObj.grandparent = itemObj.grandparent.getParent();
  				}
  				else
  					itemObj.grandparent = grandparentNode;
  
  				if ( database )
  					CKEDITOR.dom.element.setMarker( database, listItem, 'listarray_index', baseArray.length );
  				baseArray.push( itemObj );
  
  				for ( var j = 0, itemChildCount = listItem.getChildCount(), child; j < itemChildCount ; j++ )
  				{
  					child = listItem.getChild( j );
  					if ( child.type == CKEDITOR.NODE_ELEMENT && listNodeNames[ child.getName() ] )
  						// Note the recursion here, it pushes inner list items with
  						// +1 indentation in the correct order.
  						CKEDITOR.plugins.list.listToArray( child, database, baseArray, baseIndentLevel + 1, itemObj.grandparent );
  					else
  						itemObj.contents.push( child );
  				}
  			}
  			return baseArray;
  		},
  
  		// Convert our internal representation of a list back to a DOM forest.
  		arrayToList : function( listArray, database, baseIndex, paragraphMode, dir )
  		{
  			if ( !baseIndex )
  				baseIndex = 0;
  			if ( !listArray || listArray.length < baseIndex + 1 )
  				return null;
  			var doc = listArray[ baseIndex ].parent.getDocument(),
  				retval = new CKEDITOR.dom.documentFragment( doc ),
  				rootNode = null,
  				currentIndex = baseIndex,
  				indentLevel = Math.max( listArray[ baseIndex ].indent, 0 ),
  				currentListItem = null,
  				paragraphName = ( paragraphMode == CKEDITOR.ENTER_P ? 'p' : 'div' );
  			while ( 1 )
  			{
  				var item = listArray[ currentIndex ];
  				if ( item.indent == indentLevel )
  				{
  					if ( !rootNode || listArray[ currentIndex ].parent.getName() != rootNode.getName() )
  					{
  						rootNode = listArray[ currentIndex ].parent.clone( false, 1 );
  						retval.append( rootNode );
  					}
  					currentListItem = rootNode.append( item.element.clone( 0, 1 ) );
  					for ( var i = 0 ; i < item.contents.length ; i++ )
  						currentListItem.append( item.contents[i].clone( 1, 1 ) );
  					currentIndex++;
  				}
  				else if ( item.indent == Math.max( indentLevel, 0 ) + 1 )
  				{
  					var listData = CKEDITOR.plugins.list.arrayToList( listArray, null, currentIndex, paragraphMode );
  					currentListItem.append( listData.listNode );
  					currentIndex = listData.nextIndex;
  				}
  				else if ( item.indent == -1 && !baseIndex && item.grandparent )
  				{
  					currentListItem;
  					if ( listNodeNames[ item.grandparent.getName() ] )
  						currentListItem = item.element.clone( false, true );
  					else
  					{
  						// Create completely new blocks here.
  						if ( dir || item.element.hasAttributes() ||
  							( paragraphMode != CKEDITOR.ENTER_BR && item.grandparent.getName() != 'td' ) )
  						{
  							currentListItem = doc.createElement( paragraphName );
  							item.element.copyAttributes( currentListItem, { type:1, value:1 } );
  							dir && currentListItem.setAttribute( 'dir', dir );
  
  							// There might be a case where there are no attributes in the element after all
  							// (i.e. when "type" or "value" are the only attributes set). In this case, if enterMode = BR,
  							// the current item should be a fragment.
  							if ( !dir && paragraphMode == CKEDITOR.ENTER_BR && !currentListItem.hasAttributes() )
  								currentListItem = new CKEDITOR.dom.documentFragment( doc );
  						}
  						else
  							currentListItem = new CKEDITOR.dom.documentFragment( doc );
  					}
  
  					for ( i = 0 ; i < item.contents.length ; i++ )
  						currentListItem.append( item.contents[i].clone( 1, 1 ) );
  
  					if ( currentListItem.type == CKEDITOR.NODE_DOCUMENT_FRAGMENT
  						 && currentIndex != listArray.length - 1 )
  					{
  						if ( currentListItem.getLast()
  								&& currentListItem.getLast().type == CKEDITOR.NODE_ELEMENT
  								&& currentListItem.getLast().getAttribute( 'type' ) == '_moz' )
  							currentListItem.getLast().remove();
  						currentListItem.appendBogus();
  					}
  
  					if ( currentListItem.type == CKEDITOR.NODE_ELEMENT &&
  							currentListItem.getName() == paragraphName &&
  							currentListItem.$.firstChild )
  					{
  						currentListItem.trim();
  						var firstChild = currentListItem.getFirst();
  						if ( firstChild.type == CKEDITOR.NODE_ELEMENT && firstChild.isBlockBoundary() )
  						{
  							var tmp = new CKEDITOR.dom.documentFragment( doc );
  							currentListItem.moveChildren( tmp );
  							currentListItem = tmp;
  						}
  					}
  
  					var currentListItemName = currentListItem.$.nodeName.toLowerCase();
  					if ( !CKEDITOR.env.ie && ( currentListItemName == 'div' || currentListItemName == 'p' ) )
  						currentListItem.appendBogus();
  					retval.append( currentListItem );
  					rootNode = null;
  					currentIndex++;
  				}
  				else
  					return null;
  
  				if ( listArray.length <= currentIndex || Math.max( listArray[ currentIndex ].indent, 0 ) < indentLevel )
  					break;
  			}
  
  			// Clear marker attributes for the new list tree made of cloned nodes, if any.
  			if ( database )
  			{
  				var currentNode = retval.getFirst();
  				while ( currentNode )
  				{
  					if ( currentNode.type == CKEDITOR.NODE_ELEMENT )
  						CKEDITOR.dom.element.clearMarkers( database, currentNode );
  					currentNode = currentNode.getNextSourceNode();
  				}
  			}
  
  			return { listNode : retval, nextIndex : currentIndex };
  		}
  	};
  
  	function setState( editor, state )
  	{
  		editor.getCommand( this.name ).setState( state );
  	}
  
  	function onSelectionChange( evt )
  	{
  		var path = evt.data.path,
  			blockLimit = path.blockLimit,
  			elements = path.elements,
  			element;
  
  		// Grouping should only happen under blockLimit.(#3940).
  		for ( var i = 0 ; i < elements.length && ( element = elements[ i ] )
  			  && !element.equals( blockLimit ); i++ )
  		{
  			if ( listNodeNames[ elements[i].getName() ] )
  			{
  				return setState.call( this, evt.editor,
  						this.type == elements[i].getName() ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
  			}
  		}
  
  		return setState.call( this, evt.editor, CKEDITOR.TRISTATE_OFF );
  	}
  
  	function changeListType( editor, groupObj, database, listsCreated )
  	{
  		// This case is easy...
  		// 1. Convert the whole list into a one-dimensional array.
  		// 2. Change the list type by modifying the array.
  		// 3. Recreate the whole list by converting the array to a list.
  		// 4. Replace the original list with the recreated list.
  		var listArray = CKEDITOR.plugins.list.listToArray( groupObj.root, database ),
  			selectedListItems = [];
  
  		for ( var i = 0 ; i < groupObj.contents.length ; i++ )
  		{
  			var itemNode = groupObj.contents[i];
  			itemNode = itemNode.getAscendant( 'li', true );
  			if ( !itemNode || itemNode.getCustomData( 'list_item_processed' ) )
  				continue;
  			selectedListItems.push( itemNode );
  			CKEDITOR.dom.element.setMarker( database, itemNode, 'list_item_processed', true );
  		}
  
  		var root = groupObj.root,
  			fakeParent = root.getDocument().createElement( this.type );
  		// Copy all attributes, except from 'start' and 'type'.
  		root.copyAttributes( fakeParent, { start : 1, type : 1 } );
  		// The list-style-type property should be ignored.
  		fakeParent.removeStyle( 'list-style-type' );
  
  		for ( i = 0 ; i < selectedListItems.length ; i++ )
  		{
  			var listIndex = selectedListItems[i].getCustomData( 'listarray_index' );
  			listArray[listIndex].parent = fakeParent;
  		}
  		var newList = CKEDITOR.plugins.list.arrayToList( listArray, database, null, editor.config.enterMode );
  		var child, length = newList.listNode.getChildCount();
  		for ( i = 0 ; i < length && ( child = newList.listNode.getChild( i ) ) ; i++ )
  		{
  			if ( child.getName() == this.type )
  				listsCreated.push( child );
  		}
  		newList.listNode.replace( groupObj.root );
  	}
  
  	var headerTagRegex = /^h[1-6]$/;
  
  	function createList( editor, groupObj, listsCreated )
  	{
  		var contents = groupObj.contents,
  			doc = groupObj.root.getDocument(),
  			listContents = [];
  
  		// It is possible to have the contents returned by DomRangeIterator to be the same as the root.
  		// e.g. when we're running into table cells.
  		// In such a case, enclose the childNodes of contents[0] into a <div>.
  		if ( contents.length == 1 && contents[0].equals( groupObj.root ) )
  		{
  			var divBlock = doc.createElement( 'div' );
  			contents[0].moveChildren && contents[0].moveChildren( divBlock );
  			contents[0].append( divBlock );
  			contents[0] = divBlock;
  		}
  
  		// Calculate the common parent node of all content blocks.
  		var commonParent = groupObj.contents[0].getParent();
  		for ( var i = 0 ; i < contents.length ; i++ )
  			commonParent = commonParent.getCommonAncestor( contents[i].getParent() );
  
  		var useComputedState = editor.config.useComputedState,
  			listDir, explicitDirection;
  
  		useComputedState = useComputedState === undefined || useComputedState;
  
  		// We want to insert things that are in the same tree level only, so calculate the contents again
  		// by expanding the selected blocks to the same tree level.
  		for ( i = 0 ; i < contents.length ; i++ )
  		{
  			var contentNode = contents[i],
  				parentNode;
  			while ( ( parentNode = contentNode.getParent() ) )
  			{
  				if ( parentNode.equals( commonParent ) )
  				{
  					listContents.push( contentNode );
  
  					// Determine the lists's direction.
  					if ( !explicitDirection && contentNode.getDirection() )
  						explicitDirection = 1;
  
  					var itemDir = contentNode.getDirection( useComputedState );
  
  					if ( listDir !== null )
  					{
  						// If at least one LI have a different direction than current listDir, we can't have listDir.
  						if ( listDir && listDir != itemDir )
  							listDir = null;
  						else
  							listDir = itemDir;
  					}
  
  					break;
  				}
  				contentNode = parentNode;
  			}
  		}
  
  		if ( listContents.length < 1 )
  			return;
  
  		// Insert the list to the DOM tree.
  		var insertAnchor = listContents[ listContents.length - 1 ].getNext(),
  			listNode = doc.createElement( this.type );
  
  		listsCreated.push( listNode );
  
  		var contentBlock, listItem;
  
  		while ( listContents.length )
  		{
  			contentBlock = listContents.shift();
  			listItem = doc.createElement( 'li' );
  
  			// Preserve preformat block and heading structure when converting to list item. (#5335) (#5271)
  			if ( contentBlock.is( 'pre' ) || headerTagRegex.test( contentBlock.getName() ) )
  				contentBlock.appendTo( listItem );
  			else
  			{
  				// Remove DIR attribute if it was merged into list root.
  				if ( listDir && contentBlock.getDirection() )
  				{
  					contentBlock.removeStyle( 'direction' );
  					contentBlock.removeAttribute( 'dir' );
  				}
  
  				contentBlock.copyAttributes( listItem );
  				contentBlock.moveChildren( listItem );
  				contentBlock.remove();
  			}
  
  			listItem.appendTo( listNode );
  		}
  
  		// Apply list root dir only if it has been explicitly declared.
  		if ( listDir && explicitDirection )
  			listNode.setAttribute( 'dir', listDir );
  
  		if ( insertAnchor )
  			listNode.insertBefore( insertAnchor );
  		else
  			listNode.appendTo( commonParent );
  	}
  
  	function removeList( editor, groupObj, database )
  	{
  		// This is very much like the change list type operation.
  		// Except that we're changing the selected items' indent to -1 in the list array.
  		var listArray = CKEDITOR.plugins.list.listToArray( groupObj.root, database ),
  			selectedListItems = [];
  
  		for ( var i = 0 ; i < groupObj.contents.length ; i++ )
  		{
  			var itemNode = groupObj.contents[i];
  			itemNode = itemNode.getAscendant( 'li', true );
  			if ( !itemNode || itemNode.getCustomData( 'list_item_processed' ) )
  				continue;
  			selectedListItems.push( itemNode );
  			CKEDITOR.dom.element.setMarker( database, itemNode, 'list_item_processed', true );
  		}
  
  		var lastListIndex = null;
  		for ( i = 0 ; i < selectedListItems.length ; i++ )
  		{
  			var listIndex = selectedListItems[i].getCustomData( 'listarray_index' );
  			listArray[listIndex].indent = -1;
  			lastListIndex = listIndex;
  		}
  
  		// After cutting parts of the list out with indent=-1, we still have to maintain the array list
  		// model's nextItem.indent <= currentItem.indent + 1 invariant. Otherwise the array model of the
  		// list cannot be converted back to a real DOM list.
  		for ( i = lastListIndex + 1 ; i < listArray.length ; i++ )
  		{
  			if ( listArray[i].indent > listArray[i-1].indent + 1 )
  			{
  				var indentOffset = listArray[i-1].indent + 1 - listArray[i].indent;
  				var oldIndent = listArray[i].indent;
  				while ( listArray[i] && listArray[i].indent >= oldIndent )
  				{
  					listArray[i].indent += indentOffset;
  					i++;
  				}
  				i--;
  			}
  		}
  
  		var newList = CKEDITOR.plugins.list.arrayToList( listArray, database, null, editor.config.enterMode,
  			groupObj.root.getAttribute( 'dir' ) );
  
  		// Compensate <br> before/after the list node if the surrounds are non-blocks.(#3836)
  		var docFragment = newList.listNode, boundaryNode, siblingNode;
  		function compensateBrs( isStart )
  		{
  			if ( ( boundaryNode = docFragment[ isStart ? 'getFirst' : 'getLast' ]() )
  				 && !( boundaryNode.is && boundaryNode.isBlockBoundary() )
  				 && ( siblingNode = groupObj.root[ isStart ? 'getPrevious' : 'getNext' ]
  				      ( CKEDITOR.dom.walker.whitespaces( true ) ) )
  				 && !( siblingNode.is && siblingNode.isBlockBoundary( { br : 1 } ) ) )
  				editor.document.createElement( 'br' )[ isStart ? 'insertBefore' : 'insertAfter' ]( boundaryNode );
  		}
  		compensateBrs( true );
  		compensateBrs();
  
  		docFragment.replace( groupObj.root );
  	}
  
  	function listCommand( name, type )
  	{
  		this.name = name;
  		this.type = type;
  	}
  
  	listCommand.prototype = {
  		exec : function( editor )
  		{
  			editor.focus();
  
  			var doc = editor.document,
  				selection = editor.getSelection(),
  				ranges = selection && selection.getRanges( true );
  
  			// There should be at least one selected range.
  			if ( !ranges || ranges.length < 1 )
  				return;
  
  			// Midas lists rule #1 says we can create a list even in an empty document.
  			// But DOM iterator wouldn't run if the document is really empty.
  			// So create a paragraph if the document is empty and we're going to create a list.
  			if ( this.state == CKEDITOR.TRISTATE_OFF )
  			{
  				var body = doc.getBody();
  				body.trim();
  				if ( !body.getFirst() )
  				{
  					var paragraph = doc.createElement( editor.config.enterMode == CKEDITOR.ENTER_P ? 'p' :
  							( editor.config.enterMode == CKEDITOR.ENTER_DIV ? 'div' : 'br' ) );
  					paragraph.appendTo( body );
  					ranges = new CKEDITOR.dom.rangeList( [ new CKEDITOR.dom.range( doc ) ] );
  					// IE exception on inserting anything when anchor inside <br>.
  					if ( paragraph.is( 'br' ) )
  					{
  						ranges[ 0 ].setStartBefore( paragraph );
  						ranges[ 0 ].setEndAfter( paragraph );
  					}
  					else
  						ranges[ 0 ].selectNodeContents( paragraph );
  					selection.selectRanges( ranges );
  				}
  				// Maybe a single range there enclosing the whole list,
  				// turn on the list state manually(#4129).
  				else
  				{
  					var range = ranges.length == 1 && ranges[ 0 ],
  						enclosedNode = range && range.getEnclosedNode();
  					if ( enclosedNode && enclosedNode.is
  						&& this.type == enclosedNode.getName() )
  							setState.call( this, editor, CKEDITOR.TRISTATE_ON );
  				}
  			}
  
  			var bookmarks = selection.createBookmarks( true );
  
  			// Group the blocks up because there are many cases where multiple lists have to be created,
  			// or multiple lists have to be cancelled.
  			var listGroups = [],
  				database = {},
  				rangeIterator = ranges.createIterator(),
  				index = 0;
  
  			while ( ( range = rangeIterator.getNextRange() ) && ++index )
  			{
  				var boundaryNodes = range.getBoundaryNodes(),
  					startNode = boundaryNodes.startNode,
  					endNode = boundaryNodes.endNode;
  
  				if ( startNode.type == CKEDITOR.NODE_ELEMENT && startNode.getName() == 'td' )
  					range.setStartAt( boundaryNodes.startNode, CKEDITOR.POSITION_AFTER_START );
  
  				if ( endNode.type == CKEDITOR.NODE_ELEMENT && endNode.getName() == 'td' )
  					range.setEndAt( boundaryNodes.endNode, CKEDITOR.POSITION_BEFORE_END );
  
  				var iterator = range.createIterator(),
  					block;
  
  				iterator.forceBrBreak = ( this.state == CKEDITOR.TRISTATE_OFF );
  
  				while ( ( block = iterator.getNextParagraph() ) )
  				{
  					// Avoid duplicate blocks get processed across ranges.
  					if( block.getCustomData( 'list_block' ) )
  						continue;
  					else
  						CKEDITOR.dom.element.setMarker( database, block, 'list_block', 1 );
  
  					var path = new CKEDITOR.dom.elementPath( block ),
  						pathElements = path.elements,
  						pathElementsCount = pathElements.length,
  						listNode = null,
  						processedFlag = 0,
  						blockLimit = path.blockLimit,
  						element;
  
  					// First, try to group by a list ancestor.
  					for ( var i = pathElementsCount - 1; i >= 0 && ( element = pathElements[ i ] ); i-- )
  					{
  						if ( listNodeNames[ element.getName() ]
  							 && blockLimit.contains( element ) )     // Don't leak outside block limit (#3940).
  						{
  							// If we've encountered a list inside a block limit
  							// The last group object of the block limit element should
  							// no longer be valid. Since paragraphs after the list
  							// should belong to a different group of paragraphs before
  							// the list. (Bug #1309)
  							blockLimit.removeCustomData( 'list_group_object_' + index );
  
  							var groupObj = element.getCustomData( 'list_group_object' );
  							if ( groupObj )
  								groupObj.contents.push( block );
  							else
  							{
  								groupObj = { root : element, contents : [ block ] };
  								listGroups.push( groupObj );
  								CKEDITOR.dom.element.setMarker( database, element, 'list_group_object', groupObj );
  							}
  							processedFlag = 1;
  							break;
  						}
  					}
  
  					if ( processedFlag )
  						continue;
  
  					// No list ancestor? Group by block limit, but don't mix contents from different ranges.
  					var root = blockLimit;
  					if ( root.getCustomData( 'list_group_object_' + index ) )
  						root.getCustomData( 'list_group_object_' + index ).contents.push( block );
  					else
  					{
  						groupObj = { root : root, contents : [ block ] };
  						CKEDITOR.dom.element.setMarker( database, root, 'list_group_object_' + index, groupObj );
  						listGroups.push( groupObj );
  					}
  				}
  			}
  
  			// Now we have two kinds of list groups, groups rooted at a list, and groups rooted at a block limit element.
  			// We either have to build lists or remove lists, for removing a list does not makes sense when we are looking
  			// at the group that's not rooted at lists. So we have three cases to handle.
  			var listsCreated = [];
  			while ( listGroups.length > 0 )
  			{
  				groupObj = listGroups.shift();
  				if ( this.state == CKEDITOR.TRISTATE_OFF )
  				{
  					if ( listNodeNames[ groupObj.root.getName() ] )
  						changeListType.call( this, editor, groupObj, database, listsCreated );
  					else
  						createList.call( this, editor, groupObj, listsCreated );
  				}
  				else if ( this.state == CKEDITOR.TRISTATE_ON && listNodeNames[ groupObj.root.getName() ] )
  					removeList.call( this, editor, groupObj, database );
  			}
  
  			// For all new lists created, merge adjacent, same type lists.
  			for ( i = 0 ; i < listsCreated.length ; i++ )
  			{
  				listNode = listsCreated[i];
  				var mergeSibling, listCommand = this;
  				( mergeSibling = function( rtl ){
  
  					var sibling = listNode[ rtl ?
  						'getPrevious' : 'getNext' ]( CKEDITOR.dom.walker.whitespaces( true ) );
  					if ( sibling && sibling.getName &&
  						 sibling.getName() == listCommand.type )
  					{
  						sibling.remove();
  						// Move children order by merge direction.(#3820)
  						sibling.moveChildren( listNode, rtl );
  					}
  				} )();
  				mergeSibling( 1 );
  			}
  
  			// Clean up, restore selection and update toolbar button states.
  			CKEDITOR.dom.element.clearAllMarkers( database );
  			selection.selectBookmarks( bookmarks );
  			editor.focus();
  		}
  	};
  
  	var dtd = CKEDITOR.dtd;
  	var tailNbspRegex = /[\t\r\n ]*(?:&nbsp;|\xa0)$/;
  
  	function indexOfFirstChildElement( element, tagNameList )
  	{
  		var child,
  			children = element.children,
  			length = children.length;
  
  		for ( var i = 0 ; i < length ; i++ )
  		{
  			child = children[ i ];
  			if ( child.name && ( child.name in tagNameList ) )
  				return i;
  		}
  
  		return length;
  	}
  
  	function getExtendNestedListFilter( isHtmlFilter )
  	{
  		// An element filter function that corrects nested list start in an empty
  		// list item for better displaying/outputting. (#3165)
  		return function( listItem )
  		{
  			var children = listItem.children,
  				firstNestedListIndex = indexOfFirstChildElement( listItem, dtd.$list ),
  				firstNestedList = children[ firstNestedListIndex ],
  				nodeBefore = firstNestedList && firstNestedList.previous,
  				tailNbspmatch;
  
  			if ( nodeBefore
  				&& ( nodeBefore.name && nodeBefore.name == 'br'
  					|| nodeBefore.value && ( tailNbspmatch = nodeBefore.value.match( tailNbspRegex ) ) ) )
  			{
  				var fillerNode = nodeBefore;
  
  				// Always use 'nbsp' as filler node if we found a nested list appear
  				// in front of a list item.
  				if ( !( tailNbspmatch && tailNbspmatch.index ) && fillerNode == children[ 0 ] )
  					children[ 0 ] = ( isHtmlFilter || CKEDITOR.env.ie ) ?
  					                 new CKEDITOR.htmlParser.text( '\xa0' ) :
  									 new CKEDITOR.htmlParser.element( 'br', {} );
  
  				// Otherwise the filler is not needed anymore.
  				else if ( fillerNode.name == 'br' )
  					children.splice( firstNestedListIndex - 1, 1 );
  				else
  					fillerNode.value = fillerNode.value.replace( tailNbspRegex, '' );
  			}
  
  		};
  	}
  
  	var defaultListDataFilterRules = { elements : {} };
  	for ( var i in dtd.$listItem )
  		defaultListDataFilterRules.elements[ i ] = getExtendNestedListFilter();
  
  	var defaultListHtmlFilterRules = { elements : {} };
  	for ( i in dtd.$listItem )
  		defaultListHtmlFilterRules.elements[ i ] = getExtendNestedListFilter( true );
  
  	CKEDITOR.plugins.add( 'list',
  	{
  		init : function( editor )
  		{
  			// Register commands.
  			var numberedListCommand = new listCommand( 'numberedlist', 'ol' ),
  				bulletedListCommand = new listCommand( 'bulletedlist', 'ul' );
  			editor.addCommand( 'numberedlist', numberedListCommand );
  			editor.addCommand( 'bulletedlist', bulletedListCommand );
  
  			// Register the toolbar button.
  			editor.ui.addButton( 'NumberedList',
  				{
  					label : editor.lang.numberedlist,
  					command : 'numberedlist'
  				} );
  			editor.ui.addButton( 'BulletedList',
  				{
  					label : editor.lang.bulletedlist,
  					command : 'bulletedlist'
  				} );
  
  			// Register the state changing handlers.
  			editor.on( 'selectionChange', CKEDITOR.tools.bind( onSelectionChange, numberedListCommand ) );
  			editor.on( 'selectionChange', CKEDITOR.tools.bind( onSelectionChange, bulletedListCommand ) );
  		},
  
  		afterInit : function ( editor )
  		{
  			var dataProcessor = editor.dataProcessor;
  			if ( dataProcessor )
  			{
  				dataProcessor.dataFilter.addRules( defaultListDataFilterRules );
  				dataProcessor.htmlFilter.addRules( defaultListHtmlFilterRules );
  			}
  		},
  
  		requires : [ 'domiterator' ]
  	} );
  })();
  