text: ﻿/**
   * @license Copyright (c) 2003-2014, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or http://ckeditor.com/license
   */
  
  /**
   * @fileOverview Insert and remove numbered and bulleted lists.
   */
  
  ( function() {
  	var listNodeNames = { ol: 1, ul: 1 },
  		emptyTextRegex = /^[\n\r\t ]*$/;
  
  	var whitespaces = CKEDITOR.dom.walker.whitespaces(),
  		bookmarks = CKEDITOR.dom.walker.bookmark(),
  		nonEmpty = function( node ) {
  			return !( whitespaces( node ) || bookmarks( node ) );
  		},
  		blockBogus = CKEDITOR.dom.walker.bogus();
  
  	function cleanUpDirection( element ) {
  		var dir, parent, parentDir;
  		if ( ( dir = element.getDirection() ) ) {
  			parent = element.getParent();
  			while ( parent && !( parentDir = parent.getDirection() ) )
  				parent = parent.getParent();
  
  			if ( dir == parentDir )
  				element.removeAttribute( 'dir' );
  		}
  	}
  
  	// Inheirt inline styles from another element.
  	function inheirtInlineStyles( parent, el ) {
  		var style = parent.getAttribute( 'style' );
  
  		// Put parent styles before child styles.
  		style && el.setAttribute( 'style', style.replace( /([^;])$/, '$1;' ) + ( el.getAttribute( 'style' ) || '' ) );
  	}
  
  	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.
  		 *
  		 * @member CKEDITOR.plugins.list
  		 * @todo params
  		 */
  		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 );
  
  				// Fixing malformed nested lists by moving it into a previous list item. (#6236)
  				if ( listItem.type == CKEDITOR.NODE_ELEMENT && listItem.getName() in CKEDITOR.dtd.$list )
  					CKEDITOR.plugins.list.listToArray( listItem, database, baseArray, baseIndentLevel + 1 );
  
  				// 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.
  		 *
  		 * @member CKEDITOR.plugins.list
  		 * @todo params
  		 */
  		arrayToList: function( listArray, database, baseIndex, paragraphMode, dir ) {
  			if ( !baseIndex )
  				baseIndex = 0;
  			if ( !listArray || listArray.length < baseIndex + 1 )
  				return null;
  			var i,
  				doc = listArray[ baseIndex ].parent.getDocument(),
  				retval = new CKEDITOR.dom.documentFragment( doc ),
  				rootNode = null,
  				currentIndex = baseIndex,
  				indentLevel = Math.max( listArray[ baseIndex ].indent, 0 ),
  				currentListItem = null,
  				orgDir, block,
  				paragraphName = ( paragraphMode == CKEDITOR.ENTER_P ? 'p' : 'div' );
  			while ( 1 ) {
  				var item = listArray[ currentIndex ],
  					itemGrandParent = item.grandparent;
  
  				orgDir = item.element.getDirection( 1 );
  
  				if ( item.indent == indentLevel ) {
  					if ( !rootNode || listArray[ currentIndex ].parent.getName() != rootNode.getName() ) {
  						rootNode = listArray[ currentIndex ].parent.clone( false, 1 );
  						dir && rootNode.setAttribute( 'dir', dir );
  						retval.append( rootNode );
  					}
  					currentListItem = rootNode.append( item.element.clone( 0, 1 ) );
  
  					if ( orgDir != rootNode.getDirection( 1 ) )
  						currentListItem.setAttribute( 'dir', orgDir );
  
  					for ( 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 ) {
  					// Maintain original direction (#6861).
  					var currDir = listArray[ currentIndex - 1 ].element.getDirection( 1 ),
  						listData = CKEDITOR.plugins.list.arrayToList( listArray, null, currentIndex, paragraphMode, currDir != orgDir ? orgDir : null );
  
  					// If the next block is an <li> with another list tree as the first
  					// child, we'll need to append a filler (<br>/NBSP) or the list item
  					// wouldn't be editable. (#6724)
  					if ( !currentListItem.getChildCount() && CKEDITOR.env.needsNbspFiller && !( doc.$.documentMode > 7 ) )
  						currentListItem.append( doc.createText( '\xa0' ) );
  					currentListItem.append( listData.listNode );
  					currentIndex = listData.nextIndex;
  				} else if ( item.indent == -1 && !baseIndex && itemGrandParent ) {
  					if ( listNodeNames[ itemGrandParent.getName() ] ) {
  						currentListItem = item.element.clone( false, true );
  						if ( orgDir != itemGrandParent.getDirection( 1 ) )
  							currentListItem.setAttribute( 'dir', orgDir );
  					} else
  						currentListItem = new CKEDITOR.dom.documentFragment( doc );
  
  					// Migrate all children to the new container,
  					// apply the proper text direction.
  					var dirLoose = itemGrandParent.getDirection( 1 ) != orgDir,
  						li = item.element,
  						className = li.getAttribute( 'class' ),
  						style = li.getAttribute( 'style' );
  
  					var needsBlock = currentListItem.type == CKEDITOR.NODE_DOCUMENT_FRAGMENT && ( paragraphMode != CKEDITOR.ENTER_BR || dirLoose || style || className );
  
  					var child,
  						count = item.contents.length,
  						cachedBookmark;
  
  					for ( i = 0; i < count; i++ ) {
  						child = item.contents[ i ];
  
  						// Append bookmark if we can, or cache it and append it when we'll know
  						// what to do with it. Generally - we want to keep it next to its original neighbour.
  						// Exception: if bookmark is the only child it hasn't got any neighbour, so handle it normally
  						// (wrap with block if needed).
  						if ( bookmarks( child ) && count > 1 ) {
  							// If we don't need block, it's simple - append bookmark directly to the current list item.
  							if ( !needsBlock )
  								currentListItem.append( child.clone( 1, 1 ) );
  							else
  								cachedBookmark = child.clone( 1, 1 );
  						}
  						// Block content goes directly to the current list item, without wrapping.
  						else if ( child.type == CKEDITOR.NODE_ELEMENT && child.isBlockBoundary() ) {
  							// Apply direction on content blocks.
  							if ( dirLoose && !child.getDirection() )
  								child.setAttribute( 'dir', orgDir );
  
  							inheirtInlineStyles( li, child );
  
  							className && child.addClass( className );
  
  							// Close the block which we started for inline content.
  							block = null;
  							// Append bookmark directly before current child.
  							if ( cachedBookmark ) {
  								currentListItem.append( cachedBookmark );
  								cachedBookmark = null;
  							}
  							// Append this block element to the list item.
  							currentListItem.append( child.clone( 1, 1 ) );
  						}
  						// Some inline content was found - wrap it with block and append that
  						// block to the current list item or append it to the block previously created.
  						else if ( needsBlock ) {
  							// Establish new block to hold text direction and styles.
  							if ( !block ) {
  								block = doc.createElement( paragraphName );
  								currentListItem.append( block );
  								dirLoose && block.setAttribute( 'dir', orgDir );
  							}
  
  							// Copy over styles to new block;
  							style && block.setAttribute( 'style', style );
  							className && block.setAttribute( 'class', className );
  
  							// Append bookmark directly before current child.
  							if ( cachedBookmark ) {
  								block.append( cachedBookmark );
  								cachedBookmark = null;
  							}
  							block.append( child.clone( 1, 1 ) );
  						}
  						// E.g. BR mode - inline content appended directly to the list item.
  						else
  							currentListItem.append( child.clone( 1, 1 ) );
  					}
  
  					// No content after bookmark - append it to the block if we had one
  					// or directly to the current list item if we finished directly in the current list item.
  					if ( cachedBookmark ) {
  						( block || currentListItem ).append( cachedBookmark );
  						cachedBookmark = null;
  					}
  
  					if ( currentListItem.type == CKEDITOR.NODE_DOCUMENT_FRAGMENT && currentIndex != listArray.length - 1 ) {
  						var last;
  
  						// Remove bogus <br> if this browser uses them.
  						if ( CKEDITOR.env.needsBrFiller ) {
  							last = currentListItem.getLast();
  							if ( last && last.type == CKEDITOR.NODE_ELEMENT && last.is( 'br' ) )
  								last.remove();
  						}
  
  						// If the last element is not a block, append <br> to separate merged list items.
  						last = currentListItem.getLast( nonEmpty );
  						if ( !( last && last.type == CKEDITOR.NODE_ELEMENT && last.is( CKEDITOR.dtd.$block ) ) )
  							currentListItem.append( doc.createElement( 'br' ) );
  					}
  
  					var currentListItemName = currentListItem.$.nodeName.toLowerCase();
  					if ( currentListItemName == 'div' || currentListItemName == 'p' )
  						currentListItem.appendBogus();
  					retval.append( currentListItem );
  					rootNode = null;
  					currentIndex++;
  				} else
  					return null;
  
  				block = null;
  
  				if ( listArray.length <= currentIndex || Math.max( listArray[ currentIndex ].indent, 0 ) < indentLevel )
  					break;
  			}
  
  			if ( database ) {
  				var currentNode = retval.getFirst(),
  					listRoot = listArray[ 0 ].parent;
  
  				while ( currentNode ) {
  					if ( currentNode.type == CKEDITOR.NODE_ELEMENT ) {
  						// Clear marker attributes for the new list tree made of cloned nodes, if any.
  						CKEDITOR.dom.element.clearMarkers( database, currentNode );
  
  						// Clear redundant direction attribute specified on list items.
  						if ( currentNode.getName() in CKEDITOR.dtd.$listItem )
  							cleanUpDirection( currentNode );
  					}
  
  					currentNode = currentNode.getNextSourceNode();
  				}
  			}
  
  			return { listNode: retval, nextIndex: currentIndex };
  		}
  	};
  
  	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,
  			doc = root.getDocument(),
  			listNode, newListNode;
  
  		for ( i = 0; i < selectedListItems.length; i++ ) {
  			var listIndex = selectedListItems[ i ].getCustomData( 'listarray_index' );
  			listNode = listArray[ listIndex ].parent;
  
  			// Switch to new list node for this particular item.
  			if ( !listNode.is( this.type ) ) {
  				newListNode = doc.createElement( this.type );
  				// Copy all attributes, except from 'start' and 'type'.
  				listNode.copyAttributes( newListNode, { start: 1, type: 1 } );
  				// The list-style-type property should be ignored.
  				newListNode.removeStyle( 'list-style-type' );
  				listArray[ listIndex ].parent = newListNode;
  			}
  		}
  
  		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 );
  
  		editor.fire( 'contentDomInvalidated' );
  	}
  
  	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' );
  
  			// If current block should be preserved, append it to list item instead of
  			// transforming it to <li> element.
  			if ( shouldPreserveBlock( contentBlock ) )
  				contentBlock.appendTo( listItem );
  			else {
  				contentBlock.copyAttributes( listItem );
  				// Remove direction attribute after it was merged into list root. (#7657)
  				if ( listDir && contentBlock.getDirection() ) {
  					listItem.removeStyle( 'direction' );
  					listItem.removeAttribute( 'dir' );
  				}
  				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.invisible( true ) ) ) && !( siblingNode.is && siblingNode.isBlockBoundary( { br: 1 } ) ) )
  				editor.document.createElement( 'br' )[ isStart ? 'insertBefore' : 'insertAfter' ]( boundaryNode );
  		}
  		compensateBrs( true );
  		compensateBrs();
  
  		docFragment.replace( groupObj.root );
  
  		editor.fire( 'contentDomInvalidated' );
  	}
  
  	var headerTagRegex = /^h[1-6]$/;
  
  	// Checks wheather this block should be element preserved (not transformed to <li>) when creating list.
  	function shouldPreserveBlock( block ) {
  		return (
  			// #5335
  			block.is( 'pre' ) ||
  			// #5271 - this is a header.
  			headerTagRegex.test( block.getName() ) ||
  			// 11083 - this is a non-editable element.
  			block.getAttribute( 'contenteditable' ) == 'false'
  		);
  	}
  
  	function listCommand( name, type ) {
  		this.name = name;
  		this.type = type;
  		this.context = type;
  		this.allowedContent = type + ' li';
  		this.requiredContent = type;
  	}
  
  	var elementType = CKEDITOR.dom.walker.nodeType( CKEDITOR.NODE_ELEMENT );
  
  	// Merge child nodes with direction preserved. (#7448)
  	function mergeChildren( from, into, refNode, forward ) {
  		var child, itemDir;
  		while ( ( child = from[ forward ? 'getLast' : 'getFirst' ]( elementType ) ) ) {
  			if ( ( itemDir = child.getDirection( 1 ) ) !== into.getDirection( 1 ) )
  				child.setAttribute( 'dir', itemDir );
  
  			child.remove();
  
  			refNode ? child[ forward ? 'insertBefore' : 'insertAfter' ]( refNode ) : into.append( child, forward );
  		}
  	}
  
  	listCommand.prototype = {
  		exec: function( editor ) {
  			// Run state check first of all.
  			this.refresh( editor, editor.elementPath() );
  
  			var doc = editor.document,
  				config = editor.config,
  				selection = editor.getSelection(),
  				ranges = selection && selection.getRanges();
  
  			// 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 editable = editor.editable();
  				if ( !editable.getFirst( nonEmpty ) ) {
  					config.enterMode == CKEDITOR.ENTER_BR ? editable.appendBogus() : ranges[ 0 ].fixBlock( 1, config.enterMode == CKEDITOR.ENTER_P ? 'p' : 'div' );
  
  					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() )
  						this.setState( 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 = editor.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 into adjacent, same type lists.
  			for ( i = 0; i < listsCreated.length; i++ )
  				mergeListSiblings( listsCreated[ i ] );
  
  			// Clean up, restore selection and update toolbar button states.
  			CKEDITOR.dom.element.clearAllMarkers( database );
  			selection.selectBookmarks( bookmarks );
  			editor.focus();
  		},
  
  		refresh: function( editor, path ) {
  			var list = path.contains( listNodeNames, 1 ),
  				limit = path.blockLimit || path.root;
  
  			// 1. Only a single type of list activate.
  			// 2. Do not show list outside of block limit.
  			if ( list && limit.contains( list ) )
  				this.setState( list.is( this.type ) ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
  			else
  				this.setState( CKEDITOR.TRISTATE_OFF );
  		}
  	};
  
  	var dtd = CKEDITOR.dtd;
  	var tailNbspRegex = /[\t\r\n ]*(?:&nbsp;|\xa0)$/;
  
  		// Merge list adjacent, of same type lists.
  	function mergeListSiblings( listNode )
  	{
  		var mergeSibling;
  		( mergeSibling = function( rtl )
  		{
  			var sibling = listNode[ rtl ? 'getPrevious' : 'getNext' ]( nonEmpty );
  			if ( sibling &&
  			     sibling.type == CKEDITOR.NODE_ELEMENT &&
  			     sibling.is( listNode.getName() ) )
  			{
  				// Move children order by merge direction.(#3820)
  				mergeChildren( listNode, sibling, null, !rtl );
  
  				listNode.remove();
  				listNode = sibling;
  			}
  		} )();
  		mergeSibling( 1 );
  	}
  
  	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;
  	}
  
  	// Check if node is block element that recieves text.
  	function isTextBlock( node ) {
  		return node.type == CKEDITOR.NODE_ELEMENT && ( node.getName() in CKEDITOR.dtd.$block || node.getName() in CKEDITOR.dtd.$listItem ) && CKEDITOR.dtd[ node.getName() ][ '#' ];
  	}
  
  	// Join visually two block lines.
  	function joinNextLineToCursor( editor, cursor, nextCursor ) {
  		editor.fire( 'saveSnapshot' );
  
  		// Merge with previous block's content.
  		nextCursor.enlarge( CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS );
  		var frag = nextCursor.extractContents();
  
  		cursor.trim( false, true );
  		var bm = cursor.createBookmark();
  
  		// Kill original bogus;
  		var currentPath = new CKEDITOR.dom.elementPath( cursor.startContainer ),
  				pathBlock = currentPath.block,
  				currentBlock = currentPath.lastElement.getAscendant( 'li', 1 ) || pathBlock,
  				nextPath = new CKEDITOR.dom.elementPath( nextCursor.startContainer ),
  				nextLi = nextPath.contains( CKEDITOR.dtd.$listItem ),
  				nextList = nextPath.contains( CKEDITOR.dtd.$list ),
  				last;
  
  		// Remove bogus node the current block/pseudo block.
  		if ( pathBlock ) {
  			var bogus = pathBlock.getBogus();
  			bogus && bogus.remove();
  		}
  		else if ( nextList ) {
  			last = nextList.getPrevious( nonEmpty );
  			if ( last && blockBogus( last ) )
  				last.remove();
  		}
  
  		// Kill the tail br in extracted.
  		last = frag.getLast();
  		if ( last && last.type == CKEDITOR.NODE_ELEMENT && last.is( 'br' ) )
  			last.remove();
  
  		// Insert fragment at the range position.
  		var nextNode = cursor.startContainer.getChild( cursor.startOffset );
  		if ( nextNode )
  			frag.insertBefore( nextNode );
  		else
  			cursor.startContainer.append( frag );
  
  		// Move the sub list nested in the next list item.
  		if ( nextLi ) {
  			var sublist = getSubList( nextLi );
  			if ( sublist ) {
  				// If next line is in the sub list of the current list item.
  				if ( currentBlock.contains( nextLi ) ) {
  					mergeChildren( sublist, nextLi.getParent(), nextLi );
  					sublist.remove();
  				}
  				// Migrate the sub list to current list item.
  				else
  					currentBlock.append( sublist );
  			}
  		}
  
  		var nextBlock, parent;
  		// Remove any remaining zombies path blocks at the end after line merged.
  		while ( nextCursor.checkStartOfBlock() && nextCursor.checkEndOfBlock() ) {
  			nextPath = nextCursor.startPath();
  			nextBlock = nextPath.block;
  
  			// Abort when nothing to be removed (#10890).
  			if ( !nextBlock )
  				break;
  
  			// Check if also to remove empty list.
  			if ( nextBlock.is( 'li' ) ) {
  				parent = nextBlock.getParent();
  				if ( nextBlock.equals( parent.getLast( nonEmpty ) ) && nextBlock.equals( parent.getFirst( nonEmpty ) ) )
  					nextBlock = parent;
  			}
  
  			nextCursor.moveToPosition( nextBlock, CKEDITOR.POSITION_BEFORE_START );
  			nextBlock.remove();
  		}
  
  		// Check if need to further merge with the list resides after the merged block. (#9080)
  		var walkerRng = nextCursor.clone(), editable = editor.editable();
  		walkerRng.setEndAt( editable, CKEDITOR.POSITION_BEFORE_END );
  		var walker = new CKEDITOR.dom.walker( walkerRng );
  		walker.evaluator = function( node ) { return nonEmpty( node ) && !blockBogus( node ); };
  		var next = walker.next();
  		if ( next && next.type == CKEDITOR.NODE_ELEMENT && next.getName() in CKEDITOR.dtd.$list )
  			mergeListSiblings( next );
  
  		cursor.moveToBookmark( bm );
  
  		// Make fresh selection.
  		cursor.select();
  
  		editor.fire( 'saveSnapshot' );
  	}
  
  	function getSubList( li ) {
  		var last = li.getLast( nonEmpty );
  		return last && last.type == CKEDITOR.NODE_ELEMENT && last.getName() in listNodeNames ? last : null;
  	}
  
  	CKEDITOR.plugins.add( 'list', {
  		lang: 'af,ar,bg,bn,bs,ca,cs,cy,da,de,el,en,en-au,en-ca,en-gb,eo,es,et,eu,fa,fi,fo,fr,fr-ca,gl,gu,he,hi,hr,hu,id,is,it,ja,ka,km,ko,ku,lt,lv,mk,mn,ms,nb,nl,no,pl,pt,pt-br,ro,ru,si,sk,sl,sq,sr,sr-latn,sv,th,tr,tt,ug,uk,vi,zh,zh-cn', // %REMOVE_LINE_CORE%
  		icons: 'bulletedlist,bulletedlist-rtl,numberedlist,numberedlist-rtl', // %REMOVE_LINE_CORE%
  		hidpi: true, // %REMOVE_LINE_CORE%
  		requires: 'indentlist',
  		init: function( editor ) {
  			if ( editor.blockless )
  				return;
  
  			// Register commands.
  			editor.addCommand( 'numberedlist', new listCommand( 'numberedlist', 'ol' ) );
  			editor.addCommand( 'bulletedlist', new listCommand( 'bulletedlist', 'ul' ) );
  
  			// Register the toolbar button.
  			if ( editor.ui.addButton ) {
  				editor.ui.addButton( 'NumberedList', {
  					label: editor.lang.list.numberedlist,
  					command: 'numberedlist',
  					directional: true,
  					toolbar: 'list,10'
  				} );
  				editor.ui.addButton( 'BulletedList', {
  					label: editor.lang.list.bulletedlist,
  					command: 'bulletedlist',
  					directional: true,
  					toolbar: 'list,20'
  				} );
  			}
  
  			// Handled backspace/del key to join list items. (#8248,#9080)
  			editor.on( 'key', function( evt ) {
  				// Use getKey directly in order to ignore modifiers.
  				// Justification: http://dev.ckeditor.com/ticket/11861#comment:13
  				var key = evt.data.domEvent.getKey();
  
  				// DEl/BACKSPACE
  				if ( editor.mode == 'wysiwyg' && key in { 8: 1, 46: 1 } ) {
  					var sel = editor.getSelection(),
  						range = sel.getRanges()[ 0 ],
  						path = range && range.startPath();
  
  					if ( !range || !range.collapsed )
  						return;
  
  					var isBackspace = key == 8;
  					var editable = editor.editable();
  					var walker = new CKEDITOR.dom.walker( range.clone() );
  					walker.evaluator = function( node ) {
  						return nonEmpty( node ) && !blockBogus( node );
  					};
  					// Backspace/Del behavior at the start/end of table is handled in core.
  					walker.guard = function( node, isOut ) {
  						return !( isOut && node.type == CKEDITOR.NODE_ELEMENT && node.is( 'table' ) );
  					};
  
  					var cursor = range.clone();
  
  					if ( isBackspace ) {
  						var previous, joinWith;
  
  						// Join a sub list's first line, with the previous visual line in parent.
  						if ( ( previous = path.contains( listNodeNames ) ) &&
  						     range.checkBoundaryOfElement( previous, CKEDITOR.START ) &&
  						     ( previous = previous.getParent() ) && previous.is( 'li' ) &&
  						     ( previous = getSubList( previous ) ) ) {
  							joinWith = previous;
  							previous = previous.getPrevious( nonEmpty );
  							// Place cursor before the nested list.
  							cursor.moveToPosition(
  								previous && blockBogus( previous ) ? previous : joinWith,
  								CKEDITOR.POSITION_BEFORE_START );
  						}
  						// Join any line following a list, with the last visual line of the list.
  						else {
  							walker.range.setStartAt( editable, CKEDITOR.POSITION_AFTER_START );
  							walker.range.setEnd( range.startContainer, range.startOffset );
  
  							previous = walker.previous();
  
  							if ( previous && previous.type == CKEDITOR.NODE_ELEMENT &&
  							     ( previous.getName() in listNodeNames ||
  							       previous.is( 'li' ) ) ) {
  								if ( !previous.is( 'li' ) ) {
  									walker.range.selectNodeContents( previous );
  									walker.reset();
  									walker.evaluator = isTextBlock;
  									previous = walker.previous();
  								}
  
  								joinWith = previous;
  								// Place cursor at the end of previous block.
  								cursor.moveToElementEditEnd( joinWith );
  							}
  						}
  
  						if ( joinWith ) {
  							joinNextLineToCursor( editor, cursor, range );
  							evt.cancel();
  						}
  						else {
  							var list = path.contains( listNodeNames );
  							// Backspace pressed at the start of list outdents the first list item. (#9129)
  							if ( list && range.checkBoundaryOfElement( list, CKEDITOR.START ) ) {
  								li = list.getFirst( nonEmpty );
  
  								if ( range.checkBoundaryOfElement( li, CKEDITOR.START ) ) {
  									previous = list.getPrevious( nonEmpty );
  
  									// Only if the list item contains a sub list, do nothing but
  									// simply move cursor backward one character.
  									if ( getSubList( li ) ) {
  										if ( previous ) {
  											range.moveToElementEditEnd( previous );
  											range.select();
  										}
  
  										evt.cancel();
  									}
  									else {
  										editor.execCommand( 'outdent' );
  										evt.cancel();
  									}
  								}
  							}
  						}
  
  					} else {
  
  						var next, nextLine, li = path.contains( 'li' );
  
  						if ( li ) {
  							walker.range.setEndAt( editable, CKEDITOR.POSITION_BEFORE_END );
  
  							var last = li.getLast( nonEmpty );
  							var block = last && isTextBlock( last ) ? last : li;
  
  							// Indicate cursor at the visual end of an list item.
  							var isAtEnd = 0;
  
  							next = walker.next();
  
  							// When list item contains a sub list.
  							if ( next && next.type == CKEDITOR.NODE_ELEMENT &&
  								 next.getName() in listNodeNames &&
  								 next.equals( last ) )
  							{
  								isAtEnd = 1;
  
  								// Move to the first item in sub list.
  								next = walker.next();
  							}
  							// Right at the end of list item.
  							else if ( range.checkBoundaryOfElement( block, CKEDITOR.END ) )
  								isAtEnd = 1;
  
  
  							if ( isAtEnd && next ) {
  								// Put cursor range there.
  								nextLine = range.clone();
  								nextLine.moveToElementEditStart( next );
  
  								joinNextLineToCursor( editor, cursor, nextLine );
  								evt.cancel();
  							}
  						}
  						else
  						{
  							// Handle Del key pressed before the list.
  							walker.range.setEndAt( editable, CKEDITOR.POSITION_BEFORE_END );
  							next = walker.next();
  
  							if ( next && next.type == CKEDITOR.NODE_ELEMENT &&
  							     next.is( listNodeNames ) ) {
  								// The start <li>
  								next = next.getFirst( nonEmpty );
  
  								// Simply remove the current empty block, move cursor to the
  								// subsequent list.
  								if ( path.block &&
  								     range.checkStartOfBlock() &&
  								     range.checkEndOfBlock() ) {
  									path.block.remove();
  									range.moveToElementEditStart( next );
  									range.select();
  									evt.cancel();
  								}
  								// Preventing the default (merge behavior), but simply move
  								// the cursor one character forward if subsequent list item
  								// contains sub list.
  								else if ( getSubList( next )  ) {
  									range.moveToElementEditStart( next );
  									range.select();
  									evt.cancel();
  								}
  								// Merge the first list item with the current line.
  								else {
  									nextLine = range.clone();
  									nextLine.moveToElementEditStart( next );
  									joinNextLineToCursor( editor, cursor, nextLine );
  									evt.cancel();
  								}
  							}
  						}
  
  					}
  
  					// The backspace/del could potentially put cursor at a bad position,
  					// being it handled or not, check immediately the selection to have it fixed.
  					setTimeout( function() { editor.selectionChange( 1 ); } );
  				}
  			} );
  		}
  	} );
  } )();
  