text: ﻿/*
  Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
  For licensing, see LICENSE.html or http://ckeditor.com/license
  */
  
  /**
   * @file Increse and decrease indent commands.
   */
  
  (function()
  {
  	var listNodeNames = { ol : 1, ul : 1 };
  
  	var isNotWhitespaces = CKEDITOR.dom.walker.whitespaces( true ),
  		isNotBookmark = CKEDITOR.dom.walker.bookmark( false, true );
  
  	function setState( editor, state )
  	{
  		editor.getCommand( this.name ).setState( state );
  	}
  
  	function onSelectionChange( evt )
  	{
  		var editor = evt.editor;
  
  		var elementPath = evt.data.path,
  				list = elementPath && elementPath.contains( listNodeNames );
  
  		if ( list )
  				return setState.call( this, editor, CKEDITOR.TRISTATE_OFF );
  
  		if ( !this.useIndentClasses && this.name == 'indent' )
  			return setState.call( this, editor, CKEDITOR.TRISTATE_OFF );
  
  		var path = evt.data.path,
  			firstBlock = path.block || path.blockLimit;
  		if ( !firstBlock )
  			return setState.call( this, editor, CKEDITOR.TRISTATE_DISABLED );
  
  		if ( this.useIndentClasses )
  		{
  			var indentClass = firstBlock.$.className.match( this.classNameRegex ),
  				indentStep = 0;
  			if ( indentClass )
  			{
  				indentClass = indentClass[1];
  				indentStep = this.indentClassMap[ indentClass ];
  			}
  			if ( ( this.name == 'outdent' && !indentStep ) ||
  					( this.name == 'indent' && indentStep == editor.config.indentClasses.length ) )
  				return setState.call( this, editor, CKEDITOR.TRISTATE_DISABLED );
  			return setState.call( this, editor, CKEDITOR.TRISTATE_OFF );
  		}
  		else
  		{
  			var indent = parseInt( firstBlock.getStyle( getIndentCssProperty( firstBlock ) ), 10 );
  			if ( isNaN( indent ) )
  				indent = 0;
  			if ( indent <= 0 )
  				return setState.call( this, editor, CKEDITOR.TRISTATE_DISABLED );
  			return setState.call( this, editor, CKEDITOR.TRISTATE_OFF );
  		}
  	}
  
  	function indentCommand( editor, name )
  	{
  		this.name = name;
  		this.useIndentClasses = editor.config.indentClasses && editor.config.indentClasses.length > 0;
  		if ( this.useIndentClasses )
  		{
  			this.classNameRegex = new RegExp( '(?:^|\\s+)(' + editor.config.indentClasses.join( '|' ) + ')(?=$|\\s)' );
  			this.indentClassMap = {};
  			for ( var i = 0 ; i < editor.config.indentClasses.length ; i++ )
  				this.indentClassMap[ editor.config.indentClasses[i] ] = i + 1;
  		}
  
  		this.startDisabled = name == 'outdent';
  	}
  
  	// Returns the CSS property to be used for identing a given element.
  	function getIndentCssProperty( element )
  	{
  		return element.getComputedStyle( 'direction' ) == 'ltr' ? 'margin-left' : 'margin-right';
  	}
  
  	function isListItem( node )
  	{
  		return node.type = CKEDITOR.NODE_ELEMENT && node.is( 'li' );
  	}
  
  	indentCommand.prototype = {
  		exec : function( editor )
  		{
  			var self = this, database = {};
  
  			function indentList( listNode )
  			{
  				// Our starting and ending points of the range might be inside some blocks under a list item...
  				// So before playing with the iterator, we need to expand the block to include the list items.
  				var startContainer = range.startContainer,
  					endContainer = range.endContainer;
  				while ( startContainer && !startContainer.getParent().equals( listNode ) )
  					startContainer = startContainer.getParent();
  				while ( endContainer && !endContainer.getParent().equals( listNode ) )
  					endContainer = endContainer.getParent();
  
  				if ( !startContainer || !endContainer )
  					return;
  
  				// Now we can iterate over the individual items on the same tree depth.
  				var block = startContainer,
  					itemsToMove = [],
  					stopFlag = false;
  				while ( !stopFlag )
  				{
  					if ( block.equals( endContainer ) )
  						stopFlag = true;
  					itemsToMove.push( block );
  					block = block.getNext();
  				}
  				if ( itemsToMove.length < 1 )
  					return;
  
  				// Do indent or outdent operations on the array model of the list, not the
  				// list's DOM tree itself. The array model demands that it knows as much as
  				// possible about the surrounding lists, we need to feed it the further
  				// ancestor node that is still a list.
  				var listParents = listNode.getParents( true );
  				for ( var i = 0 ; i < listParents.length ; i++ )
  				{
  					if ( listParents[i].getName && listNodeNames[ listParents[i].getName() ] )
  					{
  						listNode = listParents[i];
  						break;
  					}
  				}
  				var indentOffset = self.name == 'indent' ? 1 : -1,
  					startItem = itemsToMove[0],
  					lastItem = itemsToMove[ itemsToMove.length - 1 ];
  
  				// Convert the list DOM tree into a one dimensional array.
  				var listArray = CKEDITOR.plugins.list.listToArray( listNode, database );
  
  				// Apply indenting or outdenting on the array.
  				var baseIndent = listArray[ lastItem.getCustomData( 'listarray_index' ) ].indent;
  				for ( i = startItem.getCustomData( 'listarray_index' ); i <= lastItem.getCustomData( 'listarray_index' ); i++ )
  				{
  					listArray[ i ].indent += indentOffset;
  					// Make sure the newly created sublist get a brand-new element of the same type. (#5372)
  					var listRoot = listArray[ i ].parent;
  					listArray[ i ].parent = new CKEDITOR.dom.element( listRoot.getName(), listRoot.getDocument() );
  				}
  
  				for ( i = lastItem.getCustomData( 'listarray_index' ) + 1 ;
  						i < listArray.length && listArray[i].indent > baseIndent ; i++ )
  					listArray[i].indent += indentOffset;
  
  				// Convert the array back to a DOM forest (yes we might have a few subtrees now).
  				// And replace the old list with the new forest.
  				var newList = CKEDITOR.plugins.list.arrayToList( listArray, database, null, editor.config.enterMode, 0 );
  
  				// Avoid nested <li> after outdent even they're visually same,
  				// recording them for later refactoring.(#3982)
  				if ( self.name == 'outdent' )
  				{
  					var parentLiElement;
  					if ( ( parentLiElement = listNode.getParent() ) && parentLiElement.is( 'li' ) )
  					{
  						var children = newList.listNode.getChildren(),
  							pendingLis = [],
  							count = children.count(),
  							child;
  
  						for ( i = count - 1 ; i >= 0 ; i-- )
  						{
  							if ( ( child = children.getItem( i ) ) && child.is && child.is( 'li' )  )
  								pendingLis.push( child );
  						}
  					}
  				}
  
  				if ( newList )
  					newList.listNode.replace( listNode );
  
  				// Move the nested <li> to be appeared after the parent.
  				if ( pendingLis && pendingLis.length )
  				{
  					for (  i = 0; i < pendingLis.length ; i++ )
  					{
  						var li = pendingLis[ i ],
  							followingList = li;
  
  						// Nest preceding <ul>/<ol> inside current <li> if any.
  						while ( ( followingList = followingList.getNext() ) &&
  							   followingList.is &&
  							   followingList.getName() in listNodeNames )
  						{
  							// IE requires a filler NBSP for nested list inside empty list item,
  							// otherwise the list item will be inaccessiable. (#4476)
  							if ( CKEDITOR.env.ie && !li.getFirst( function( node ){ return isNotWhitespaces( node ) && isNotBookmark( node ); } ) )
  								li.append( range.document.createText( '\u00a0' ) );
  
  							li.append( followingList );
  						}
  
  						li.insertAfter( parentLiElement );
  					}
  				}
  			}
  
  			function indentBlock()
  			{
  				var iterator = range.createIterator(),
  					enterMode = editor.config.enterMode;
  				iterator.enforceRealBlocks = true;
  				iterator.enlargeBr = enterMode != CKEDITOR.ENTER_BR;
  				var block;
  				while ( ( block = iterator.getNextParagraph() ) )
  					indentElement( block );
  			}
  
  			function indentElement( element )
  			{
  				if ( element.getCustomData( 'indent_processed' ) )
  					return false;
  
  				if ( self.useIndentClasses )
  				{
  					// Transform current class name to indent step index.
  					var indentClass = element.$.className.match( self.classNameRegex ),
  							indentStep = 0;
  					if ( indentClass )
  					{
  						indentClass = indentClass[1];
  						indentStep = self.indentClassMap[ indentClass ];
  					}
  
  					// Operate on indent step index, transform indent step index back to class
  					// name.
  					if ( self.name == 'outdent' )
  						indentStep--;
  					else
  						indentStep++;
  
  					if ( indentStep < 0 )
  						return false;
  
  					indentStep = Math.min( indentStep, editor.config.indentClasses.length );
  					indentStep = Math.max( indentStep, 0 );
  					var className = CKEDITOR.tools.ltrim( element.$.className.replace( self.classNameRegex, '' ) );
  					if ( indentStep < 1 )
  						element.$.className = className;
  					else
  						element.addClass( editor.config.indentClasses[ indentStep - 1 ] );
  				}
  				else
  				{
  					var indentCssProperty = getIndentCssProperty( element );
  					var currentOffset = parseInt( element.getStyle( indentCssProperty ), 10 );
  					if ( isNaN( currentOffset ) )
  						currentOffset = 0;
  					currentOffset += ( self.name == 'indent' ? 1 : -1 ) * editor.config.indentOffset;
  
  					if ( currentOffset < 0 )
  						return false;
  
  					currentOffset = Math.max( currentOffset, 0 );
  					currentOffset = Math.ceil( currentOffset / editor.config.indentOffset ) * editor.config.indentOffset;
  					element.setStyle( indentCssProperty, currentOffset ? currentOffset + editor.config.indentUnit : '' );
  					if ( element.getAttribute( 'style' ) === '' )
  						element.removeAttribute( 'style' );
  				}
  
  				CKEDITOR.dom.element.setMarker( database, element, 'indent_processed', true );
  				return true;
  			}
  
  			var selection = editor.getSelection(),
  				bookmarks = selection.createBookmarks( true ),
  				ranges = selection && selection.getRanges( true ),
  				range;
  
  			var iterator = ranges.createIterator();
  			while ( ( range = iterator.getNextRange() ) )
  			{
  				var startContainer = range.startContainer,
  					endContainer = range.endContainer,
  					rangeRoot = range.getCommonAncestor(),
  					nearestListBlock = rangeRoot;
  
  				while ( nearestListBlock && !( nearestListBlock.type == CKEDITOR.NODE_ELEMENT &&
  					listNodeNames[ nearestListBlock.getName() ] ) )
  					nearestListBlock = nearestListBlock.getParent();
  
  				// Avoid selection anchors under list root.
  				// <ul>[<li>...</li>]</ul> =>	<ul><li>[...]</li></ul>
  				if ( nearestListBlock && startContainer.type == CKEDITOR.NODE_ELEMENT
  					&& startContainer.getName() in listNodeNames )
  				{
  					var walker = new CKEDITOR.dom.walker( range );
  					walker.evaluator = isListItem;
  					range.startContainer = walker.next();
  				}
  
  				if ( nearestListBlock && endContainer.type == CKEDITOR.NODE_ELEMENT
  					&& endContainer.getName() in listNodeNames )
  				{
  					walker = new CKEDITOR.dom.walker( range );
  					walker.evaluator = isListItem;
  					range.endContainer = walker.previous();
  				}
  
  				if ( nearestListBlock  )
  				{
  					var firstListItem = nearestListBlock.getFirst( function( node )
  						{
  							return node.type == CKEDITOR.NODE_ELEMENT && node.is( 'li' );
  						}),
  						rangeStart = range.startContainer,
  						indentWholeList = firstListItem.equals( rangeStart ) || firstListItem.contains( rangeStart );
  
  					// Indent the entire list if  cursor is inside the first list item. (#3893)
  					if ( !( indentWholeList && indentElement( nearestListBlock ) ) )
  						indentList( nearestListBlock );
  				}
  				else
  					indentBlock();
  			}
  
  			// Clean up the markers.
  			CKEDITOR.dom.element.clearAllMarkers( database );
  
  			editor.forceNextSelectionCheck();
  			selection.selectBookmarks( bookmarks );
  		}
  	};
  
  	CKEDITOR.plugins.add( 'indent',
  	{
  		init : function( editor )
  		{
  			// Register commands.
  			var indent = new indentCommand( editor, 'indent' ),
  				outdent = new indentCommand( editor, 'outdent' );
  			editor.addCommand( 'indent', indent );
  			editor.addCommand( 'outdent', outdent );
  
  			// Register the toolbar buttons.
  			editor.ui.addButton( 'Indent',
  				{
  					label : editor.lang.indent,
  					command : 'indent'
  				});
  			editor.ui.addButton( 'Outdent',
  				{
  					label : editor.lang.outdent,
  					command : 'outdent'
  				});
  
  			// Register the state changing handlers.
  			editor.on( 'selectionChange', CKEDITOR.tools.bind( onSelectionChange, indent ) );
  			editor.on( 'selectionChange', CKEDITOR.tools.bind( onSelectionChange, outdent ) );
  
  			// [IE6/7] Raw lists are using margin instead of padding for visual indentation in wysiwyg mode. (#3893)
  			if ( CKEDITOR.env.ie6Compat || CKEDITOR.env.ie7Compat )
  			{
  				editor.addCss(
  					"ul,ol" +
  					"{" +
  					"	margin-left: 0px;" +
  					"	padding-left: 40px;" +
  					"}" );
  			}
  		},
  
  		requires : [ 'domiterator', 'list' ]
  	} );
  })();
  
  CKEDITOR.tools.extend( CKEDITOR.config,
  	{
  		indentOffset : 40,
  		indentUnit : 'px',
  		indentClasses : null
  	});
  
  /**
   * Size of each indentation step
   * @type Number
   * @example
   * config.indentOffset = 40;
   */
  
   /**
   * Unit for the indentation style
   * @type String
   * @example
   * config.indentUnit = 'px';
   */
  
   /**
   * List of classes to use for indenting the contents.
   * @type Array
   * @example
   * // Don't use classes for indenting. (this is the default value)
   * config.indentClasses = null;
   * @example
   * // Use the classes 'Indent1', 'Indent2', 'Indent3'
   * config.indentClasses = ['Indent1', 'Indent2', 'Indent3'];
   */
  
  /**
   * Size of each indentation step
   * @type Number
   * @default 40
   * @example
   * config.indentOffset = 4;
   */
  
   /**
   * Unit for the indentation style
   * @type String
   * @default 'px'
   * @example
   * config.indentUnit = 'em';
   */
  
   /**
   * List of classes to use for indenting the contents. If it's null, no classes will be used
   * and instead the {@link #indentUnit} and {@link #indentOffset} properties will be used.
   * @type Array
   * default null
   * @example
   * // Use the classes 'Indent1', 'Indent2', 'Indent3'
   * config.indentClasses = ['Indent1', 'Indent2', 'Indent3'];
   */
  