source: trunk/admin/inc/ckeditor/_source/plugins/fakeobjects/plugin.js@ 428

/*
Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

(function()
{
        var cssStyle = CKEDITOR.htmlParser.cssStyle,
                        cssLength = CKEDITOR.tools.cssLength;

        var cssLengthRegex = /^((?:\d*(?:\.\d+))|(?:\d+))(.*)?$/i;

        /*
         * Replacing the former CSS length value with the later one, with
         * adjustment to the length  unit.
         */
        function replaceCssLength( length1, length2 )
        {
                var parts1 = cssLengthRegex.exec( length1 ),
                                parts2 = cssLengthRegex.exec( length2 );

                // Omit pixel length unit when necessary,
                // e.g. replaceCssLength( 10, '20px' ) -> 20
                if ( parts1 )
                {
                        if ( !parts1[ 2 ] && parts2[ 2 ] == 'px' )
                                return parts2[ 1 ];
                        if ( parts1[ 2 ] == 'px' && !parts2[ 2 ] )
                                return parts2[ 1 ] + 'px';
                }

                return length2;
        }

        var htmlFilterRules =
        {
                elements :
                {
                        $ : function( element )
                        {
                                var attributes = element.attributes,
                                        realHtml = attributes && attributes[ 'data-cke-realelement' ],
                                        realFragment = realHtml && new CKEDITOR.htmlParser.fragment.fromHtml( decodeURIComponent( realHtml ) ),
                                        realElement = realFragment && realFragment.children[ 0 ];

                                // Width/height in the fake object are subjected to clone into the real element.
                                if ( realElement && element.attributes[ 'data-cke-resizable' ] )
                                {
                                        var styles = new cssStyle( element ).rules,
                                                realAttrs = realElement.attributes,
                                                width = styles.width,
                                                height = styles.height;

                                        width && ( realAttrs.width = replaceCssLength( realAttrs.width, width ) );
                                        height && ( realAttrs.height = replaceCssLength( realAttrs.height, height ) );
                                }

                                return realElement;
                        }
                }
        };

        CKEDITOR.plugins.add( 'fakeobjects',
        {
                requires : [ 'htmlwriter' ],

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

                        if ( htmlFilter )
                                htmlFilter.addRules( htmlFilterRules );
                }
        });

        CKEDITOR.editor.prototype.createFakeElement = function( realElement, className, realElementType, isResizable )
        {
                var lang = this.lang.fakeobjects,
                        label = lang[ realElementType ] || lang.unknown;

                var attributes =
                {
                        'class' : className,
                        src : CKEDITOR.getUrl( 'images/spacer.gif' ),
                        'data-cke-realelement' : encodeURIComponent( realElement.getOuterHtml() ),
                        'data-cke-real-node-type' : realElement.type,
                        alt : label,
                        title : label,
                        align : realElement.getAttribute( 'align' ) || ''
                };

                if ( realElementType )
                        attributes[ 'data-cke-real-element-type' ] = realElementType;

                if ( isResizable )
                {
                        attributes[ 'data-cke-resizable' ] = isResizable;

                        var fakeStyle = new cssStyle();

                        var width = realElement.getAttribute( 'width' ),
                                height = realElement.getAttribute( 'height' );

                        width && ( fakeStyle.rules.width = cssLength( width ) );
                        height && ( fakeStyle.rules.height = cssLength( height ) );
                        fakeStyle.populate( attributes );
                }

                return this.document.createElement( 'img', { attributes : attributes } );
        };

        CKEDITOR.editor.prototype.createFakeParserElement = function( realElement, className, realElementType, isResizable )
        {
                var lang = this.lang.fakeobjects,
                        label = lang[ realElementType ] || lang.unknown,
                        html;

                var writer = new CKEDITOR.htmlParser.basicWriter();
                realElement.writeHtml( writer );
                html = writer.getHtml();

                var attributes =
                {
                        'class' : className,
                        src : CKEDITOR.getUrl( 'images/spacer.gif' ),
                        'data-cke-realelement' : encodeURIComponent( html ),
                        'data-cke-real-node-type' : realElement.type,
                        alt : label,
                        title : label,
                        align : realElement.attributes.align || ''
                };

                if ( realElementType )
                        attributes[ 'data-cke-real-element-type' ] = realElementType;

                if ( isResizable )
                {
                        attributes[ 'data-cke-resizable' ] = isResizable;
                        var realAttrs = realElement.attributes,
                                fakeStyle = new cssStyle();

                        var width = realAttrs.width,
                                height = realAttrs.height;

                        width != undefined && ( fakeStyle.rules.width =  cssLength( width ) );
                        height != undefined && ( fakeStyle.rules.height = cssLength ( height ) );
                        fakeStyle.populate( attributes );
                }

                return new CKEDITOR.htmlParser.element( 'img', attributes );
        };

        CKEDITOR.editor.prototype.restoreRealElement = function( fakeElement )
        {
                if ( fakeElement.data( 'cke-real-node-type' ) != CKEDITOR.NODE_ELEMENT )
                        return null;

                var element = CKEDITOR.dom.element.createFromHtml(
                        decodeURIComponent( fakeElement.data( 'cke-realelement' ) ),
                        this.document );

                if ( fakeElement.data( 'cke-resizable') )
                {
                        var width = fakeElement.getStyle( 'width' ),
                                height = fakeElement.getStyle( 'height' );

                        width && element.setAttribute( 'width', replaceCssLength( element.getAttribute( 'width' ), width ) );
                        height && element.setAttribute( 'height', replaceCssLength( element.getAttribute( 'height' ), height ) );
                }

                return element;
        };

})();