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

/**
 * @file Plugin for inserting Drupal teaser and page breaks.
 */
CKEDITOR.plugins.add( 'wpmore',
{
	requires  : [ 'fakeobjects' ],

onLoad : function()
	{
		// Add the styles that renders our fake objects.
		CKEDITOR.addCss(
			'img.cke_wordpress_more' +
				'{' +
				'background-image: url(' + CKEDITOR.getUrl( this.path + 'images/more_bug.gif' ) + ');' +
				'background-position: right center;' +
				'background-repeat: no-repeat;' +
				'clear: both;' +
				'display: block;' +
				'float: none;' +
				'width: 100%;' +
				'border-top: #999999 1px dotted;' +
				'height: 10px;' +
				'}'
		);
	},
	init : function( editor )
	{
		// Register the toolbar buttons.
		editor.ui.addButton( 'WPMore',
			{
				label : 'Insert More Break',
				icon : this.path + 'images/more.gif',
				toolbar: 'links,100',
				command : 'wpmore'
			});

// Register the commands.

editor.addCommand( 'wpmore',
		{
			exec : function()
			{
				// There should be only one  in document. So, look
				// for an image with class "cke_drupal_break" (the fake element).
				var images = editor.document.getElementsByTag( 'img' );
				for ( var i = 0, len = images.count() ; i < len ; i++ )
				{
					var img = images.getItem( i );
					if ( img.hasClass( 'cke_wordpress_more' ) )
					{
						if ( confirm( 'The document already contains a more. Do you want to proceed by removing it first?' ) )
						{
							img.remove();
							break;
						}
						else
							return;
					}
				}

insertComment( 'more' );
			}
		} );

// This function effectively inserts the comment into the editor.
		function insertComment( text )
		{
			// Create the fake element that will be inserted into the document.
			// The trick is declaring it as an <hr>, so it will behave like a
			// block element (and in effect it behaves much like an <hr>).
			if ( !CKEDITOR.dom.comment.prototype.getAttribute ) {
				CKEDITOR.dom.comment.prototype.getAttribute = function() { return ''; };
				CKEDITOR.dom.comment.prototype.attributes = { align : '' };
			}
			var fakeElement = editor.createFakeElement( new CKEDITOR.dom.comment( text ), 'cke_wordpress_' + text, 'hr' );

// This is the trick part. We can't use editor.insertElement()
			// because we need to put the comment directly at <body> level.
			// We need to do range manipulation for that.

// Get a DOM range from the current selection.
			var range = editor.getSelection().getRanges()[0],
				elementsPath = new CKEDITOR.dom.elementPath( range.getCommonAncestor( true ) ),
				element = ( elementsPath.block && elementsPath.block.getParent() ) || elementsPath.blockLimit,
				hasMoved;

// If we're not in <body> go moving the position to after the
			// elements until reaching it. This may happen when inside tables,
			// lists, blockquotes, etc.
			while ( element && element.getName() != 'body' )
			{
				range.moveToPosition( element, CKEDITOR.POSITION_AFTER_END );
				hasMoved = 1;
				element = element.getParent();
			}

// Split the current block.
			if ( !hasMoved )
				range.splitBlock( 'p' );

// Insert the fake element into the document.
			range.insertNode( fakeElement );

// Now, we move the selection to the best possible place following
			// our fake element.
			var next = fakeElement;
			while ( ( next = next.getNext() ) && !range.moveToElementEditStart( next ) )
			{}

range.select();
		}
	},

afterInit : function( editor )
	{
		// Adds the comment processing rules to the data filter, so comments
		// are replaced by fake elements.
		editor.dataProcessor.dataFilter.addRules(
			{
				comment : function( value )
				{
					if ( !CKEDITOR.htmlParser.comment.prototype.getAttribute ) {
						CKEDITOR.htmlParser.comment.prototype.getAttribute = function() { return ''; };
						CKEDITOR.htmlParser.comment.prototype.attributes = { align : '' };
					}
					if ( value == 'more' )
						return editor.createFakeParserElement( new CKEDITOR.htmlParser.comment( value ), 'cke_wordpress_' + value, 'hr' );

return value;
				}
			});
	}
});