/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

/**
 * @fileOverview The "show border" plugin. The command display visible outline
 * border line around all table elements if table doesn't have a none-zero 'border' attribute specified.
 */

(function()
{
	var showBorderClassName = 'cke_show_border',
		cssStyleText,
		cssTemplate =
		// TODO: For IE6, we don't have child selector support,
		// where nested table cells could be incorrect.
		( CKEDITOR.env.ie6Compat ?
		  [
			'.%1 table.%2,',
			 '.%1 table.%2 td, .%1 table.%2 th,',
			 '{',
				'border : #d3d3d3 1px dotted',
			 '}'
		  ] :
		  [
			 '.%1 table.%2,',
			 '.%1 table.%2 > tr > td, .%1 table.%2 > tr > th,',
			 '.%1 table.%2 > tbody > tr > td, .%1 table.%2 > tbody > tr > th,',
			 '.%1 table.%2 > thead > tr > td, .%1 table.%2 > thead > tr > th,',
			 '.%1 table.%2 > tfoot > tr > td, .%1 table.%2 > tfoot > tr > th',
			 '{',
				'border : #d3d3d3 1px dotted',
			 '}'
		  ] ).join( '' );

	cssStyleText = cssTemplate.replace( /%2/g, showBorderClassName ).replace( /%1/g, 'cke_show_borders ' );

	var commandDefinition =
	{
		preserveState : true,
		editorFocus : false,

		exec : function ( editor )
		{
			this.toggleState();
			this.refresh( editor );
		},

		refresh : function( editor )
		{
			var funcName = ( this.state == CKEDITOR.TRISTATE_ON ) ? 'addClass' : 'removeClass';
			editor.document.getBody()[ funcName ]( 'cke_show_borders' );
		}
	};

	CKEDITOR.plugins.add( 'showborders',
	{
		requires : [ 'wysiwygarea' ],
		modes : { 'wysiwyg' : 1 },

		init : function( editor )
		{

			var command = editor.addCommand( 'showborders', commandDefinition );
			command.canUndo = false;

			if ( editor.config.startupShowBorders !== false )
				command.setState( CKEDITOR.TRISTATE_ON );

			editor.addCss( cssStyleText );

			// Refresh the command on setData.
			editor.on( 'mode', function()
				{
					if ( command.state != CKEDITOR.TRISTATE_DISABLED )
						command.refresh( editor );
				}, null, null, 100 );

			// Refresh the command on wysiwyg frame reloads.
			editor.on( 'contentDom', function()
				{
					if ( command.state != CKEDITOR.TRISTATE_DISABLED )
						command.refresh( editor );
				});

			editor.on( 'removeFormatCleanup', function( evt )
				{
					var element = evt.data;
					if ( editor.getCommand( 'showborders' ).state == CKEDITOR.TRISTATE_ON &&
						element.is( 'table' ) && ( !element.hasAttribute( 'border' ) || parseInt( element.getAttribute( 'border' ), 10 ) <= 0 ) )
							element.addClass( showBorderClassName );
				});
		},

		afterInit : function( editor )
		{
			var dataProcessor = editor.dataProcessor,
				dataFilter = dataProcessor && dataProcessor.dataFilter,
				htmlFilter = dataProcessor && dataProcessor.htmlFilter;

			if ( dataFilter )
			{
				dataFilter.addRules(
					{
						elements :
						{
							'table' : function( element )
							{
								var attributes = element.attributes,
									cssClass = attributes[ 'class' ],
									border = parseInt( attributes.border, 10 );

								if ( !border || border <= 0 )
									attributes[ 'class' ] = ( cssClass || '' ) + ' ' + showBorderClassName;
							}
						}
					} );
			}

			if ( htmlFilter )
			{
				htmlFilter.addRules(
				{
					elements :
					{
						'table' : function( table )
						{
							var attributes = table.attributes,
								cssClass = attributes[ 'class' ];

							cssClass && ( attributes[ 'class' ] =
							              cssClass.replace( showBorderClassName, '' )
									              .replace( /\s{2}/, ' ' )
												  .replace( /^\s+|\s+$/, '' ) );
						}
					}
				} );
			}
		}
	});

	// Table dialog must be aware of it.
	CKEDITOR.on( 'dialogDefinition', function( ev )
	{
		var dialogName = ev.data.name;

		if ( dialogName == 'table' || dialogName == 'tableProperties' )
		{
			var dialogDefinition = ev.data.definition,
				infoTab = dialogDefinition.getContents( 'info' ),
				borderField = infoTab.get( 'txtBorder' ),
				originalCommit = borderField.commit;

			borderField.commit = CKEDITOR.tools.override( originalCommit, function( org )
			{
				return function( data, selectedTable )
					{
						org.apply( this, arguments );
						var value = parseInt( this.getValue(), 10 );
						selectedTable[ ( !value || value <= 0 ) ? 'addClass' : 'removeClass' ]( showBorderClassName );
					};
			} );

			var advTab = dialogDefinition.getContents( 'advanced' ),
				classField = advTab && advTab.get( 'advCSSClasses' );

			if ( classField )
			{
				classField.setup = CKEDITOR.tools.override( classField.setup, function( originalSetup )
					{
						return function()
							{
								originalSetup.apply( this, arguments );
								this.setValue( this.getValue().replace( /cke_show_border/, '' ) );
							};
					});

				classField.commit = CKEDITOR.tools.override( classField.commit, function( originalCommit )
					{
						return function( data, element )
							{
								originalCommit.apply( this, arguments );

								if ( !parseInt( element.getAttribute( 'border' ), 10 ) )
									element.addClass( 'cke_show_border' );
							};
					});
			}
		}
	});

} )();

/**
 * Whether to automatically enable the "show borders" command when the editor loads.
 * @type Boolean
 * @default true
 * @example
 * config.startupShowBorders = false;
 */
