ckeditor/_source/plugins/indent/plugin.js

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/*
Copyright (c) 2003-2011, 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 },
		isNotWhitespaces = CKEDITOR.dom.walker.whitespaces( true ),
		isNotBookmark = CKEDITOR.dom.walker.bookmark( false, true );

	function onSelectionChange( evt )
	{
		if ( evt.editor.readOnly )
			return null;

		var editor = evt.editor,
			elementPath = evt.data.path,
			list = elementPath && elementPath.contains( listNodeNames ),
			firstBlock = elementPath.block || elementPath.blockLimit;

		if ( list )
				return this.setState( CKEDITOR.TRISTATE_OFF );

		if ( !this.useIndentClasses && this.name == 'indent' )
			return this.setState( CKEDITOR.TRISTATE_OFF );

		if ( !firstBlock )
			return this.setState( 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 this.setState( CKEDITOR.TRISTATE_DISABLED );
			return this.setState( CKEDITOR.TRISTATE_OFF );
		}
		else
		{
			var indent = parseInt( firstBlock.getStyle( getIndentCssProperty( firstBlock ) ), 10 );
			if ( isNaN( indent ) )
				indent = 0;
			if ( indent <= 0 )
				return this.setState( CKEDITOR.TRISTATE_DISABLED );
			return this.setState( CKEDITOR.TRISTATE_OFF );
		}
	}

	function indentCommand( editor, name )
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