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+/*
+Copyright (c) 2003-2009, CKSource - Frederico Knabben. All rights reserved.
+For licensing, see LICENSE.html or http://ckeditor.com/license
+*/
+
+/**
+ * @fileOverview The "filebrowser" plugin, it adds support for file uploads and
+ *               browsing.
+ *
+ * When file is selected inside of the file browser or uploaded, its url is
+ * inserted automatically to a field, which is described in the 'filebrowser'
+ * attribute. To specify field that should be updated, pass the tab id and
+ * element id, separated with a colon.
+ *
+ * Example 1: (Browse)
+ *
+ * <pre>
+ * {
+ * 	type : 'button',
+ * 	id : 'browse',
+ * 	filebrowser : 'tabId:elementId',
+ * 	label : editor.lang.common.browseServer
+ * }
+ * </pre>
+ *
+ * If you set the 'filebrowser' attribute on any element other than
+ * 'fileButton', the 'Browse' action will be triggered.
+ *
+ * Example 2: (Quick Upload)
+ *
+ * <pre>
+ * {
+ * 	type : 'fileButton',
+ * 	id : 'uploadButton',
+ * 	filebrowser : 'tabId:elementId',
+ * 	label : editor.lang.common.uploadSubmit,
+ * 	'for' : [ 'upload', 'upload' ]
+ * }
+ * </pre>
+ *
+ * If you set the 'filebrowser' attribute on a fileButton element, the
+ * 'QuickUpload' action will be executed.
+ *
+ * Filebrowser plugin also supports more advanced configuration (through
+ * javascript object).
+ *
+ * The following settings are supported:
+ *
+ * <pre>
+ *  [action] - Browse or QuickUpload
+ *  [target] - field to update, tabId:elementId
+ *  [params] - additional arguments to be passed to the server connector (optional)
+ *  [onSelect] - function to execute when file is selected/uploaded (optional)
+ *  [url] - the URL to be called (optional)
+ * </pre>
+ *
+ * Example 3: (Quick Upload)
+ *
+ * <pre>
+ * {
+ * 	type : 'fileButton',
+ * 	label : editor.lang.common.uploadSubmit,
+ * 	id : 'buttonId',
+ * 	filebrowser :
+ * 	{
+ * 		action : 'QuickUpload', //required
+ * 		target : 'tab1:elementId', //required
+ * 		params : //optional
+ * 		{
+ * 			type : 'Files',
+ * 			currentFolder : '/folder/'
+ * 		},
+ * 		onSelect : function( fileUrl, errorMessage ) //optional
+ * 		{
+ * 			// Do not call the built-in selectFuntion
+ * 			// return false;
+ * 		}
+ * 	},
+ * 	'for' : [ 'tab1', 'myFile' ]
+ * }
+ * </pre>
+ *
+ * Suppose we have a file element with id 'myFile', text field with id
+ * 'elementId' and a fileButton. If filebowser.url is not specified explicitly,
+ * form action will be set to 'filebrowser[DialogName]UploadUrl' or, if not
+ * specified, to 'filebrowserUploadUrl'. Additional parameters from 'params'
+ * object will be added to the query string. It is possible to create your own
+ * uploadHandler and cancel the built-in updateTargetElement command.
+ *
+ * Example 4: (Browse)
+ *
+ * <pre>
+ * {
+ * 	type : 'button',
+ * 	id : 'buttonId',
+ * 	label : editor.lang.common.browseServer,
+ * 	filebrowser :
+ * 	{
+ * 		action : 'Browse',
+ * 		url : '/ckfinder/ckfinder.html&amp;type=Images',
+ * 		target : 'tab1:elementId'
+ * 	}
+ * }
+ * </pre>
+ *
+ * In this example, after pressing a button, file browser will be opened in a
+ * popup. If we don't specify filebrowser.url attribute,
+ * 'filebrowser[DialogName]BrowseUrl' or 'filebrowserBrowseUrl' will be used.
+ * After selecting a file in a file browser, an element with id 'elementId' will
+ * be updated. Just like in the third example, a custom 'onSelect' function may be
+ * defined.
+ */
+( function()
+{
+	/**
+	 * Adds (additional) arguments to given url.
+	 *
+	 * @param {String}
+	 *            url The url.
+	 * @param {Object}
+	 *            params Additional parameters.
+	 */
+	function addQueryString( url, params )
+	{
+		var queryString = [];
+
+		if ( !params )
+			return url;
+		else
+		{
+			for ( var i in params )
+				queryString.push( i + "=" + encodeURIComponent( params[ i ] ) );
+		}
+
+		return url + ( ( url.indexOf( "?" ) != -1 ) ? "&" : "?" ) + queryString.join( "&" );
+	}
+
+	/**
+	 * Make a string's first character uppercase.
+	 *
+	 * @param {String}
+	 *            str String.
+	 */
+	function ucFirst( str )
+	{
+		str += '';
+		var f = str.charAt( 0 ).toUpperCase();
+		return f + str.substr( 1 );
+	}
+
+	/**
+	 * The onlick function assigned to the 'Browse Server' button. Opens the
+	 * file browser and updates target field when file is selected.
+	 *
+	 * @param {CKEDITOR.event}
+	 *            evt The event object.
+	 */
+	function browseServer( evt )
+	{
+		var dialog = this.getDialog();
+		var editor = dialog.getParentEditor();
+
+		editor._.filebrowserSe = this;
+
+		var width = editor.config[ 'filebrowser' + ucFirst( dialog.getName() ) + 'WindowWidth' ]
+				|| editor.config.filebrowserWindowWidth || '80%';
+		var height = editor.config[ 'filebrowser' + ucFirst( dialog.getName() ) + 'WindowHeight' ]
+				|| editor.config.filebrowserWindowHeight || '70%';
+
+		var params = this.filebrowser.params || {};
+		params.CKEditor = editor.name;
+		params.CKEditorFuncNum = editor._.filebrowserFn;
+		if ( !params.langCode )
+			params.langCode = editor.langCode;
+
+		var url = addQueryString( this.filebrowser.url, params );
+		editor.popup( url, width, height );
+	}
+
+	/**
+	 * The onlick function assigned to the 'Upload' button. Makes the final
+	 * decision whether form is really submitted and updates target field when
+	 * file is uploaded.
+	 *
+	 * @param {CKEDITOR.event}
+	 *            evt The event object.
+	 */
+	function uploadFile( evt )
+	{
+		var dialog = this.getDialog();
+		var editor = dialog.getParentEditor();
+
+		editor._.filebrowserSe = this;
+
+		// If user didn't select the file, stop the upload.
+		if ( !dialog.getContentElement( this[ 'for' ][ 0 ], this[ 'for' ][ 1 ] ).getInputElement().$.value )
+			return false;
+
+		if ( !dialog.getContentElement( this[ 'for' ][ 0 ], this[ 'for' ][ 1 ] ).getAction() )
+			return false;
+
+		return true;
+	}
+
+	/**
+	 * Setups the file element.
+	 *
+	 * @param {CKEDITOR.ui.dialog.file}
+	 *            fileInput The file element used during file upload.
+	 * @param {Object}
+	 *            filebrowser Object containing filebrowser settings assigned to
+	 *            the fileButton associated with this file element.
+	 */
+	function setupFileElement( editor, fileInput, filebrowser )
+	{
+		var params = filebrowser.params || {};
+		params.CKEditor = editor.name;
+		params.CKEditorFuncNum = editor._.filebrowserFn;
+		if ( !params.langCode )
+			params.langCode = editor.langCode;
+
+		fileInput.action = addQueryString( filebrowser.url, params );
+		fileInput.filebrowser = filebrowser;
+	}
+
+	/**
+	 * Traverse through the content definition and attach filebrowser to
+	 * elements with 'filebrowser' attribute.
+	 *
+	 * @param String
+	 *            dialogName Dialog name.
+	 * @param {CKEDITOR.dialog.dialogDefinitionObject}
+	 *            definition Dialog definition.
+	 * @param {Array}
+	 *            elements Array of {@link CKEDITOR.dialog.contentDefinition}
+	 *            objects.
+	 */
+	function attachFileBrowser( editor, dialogName, definition, elements )
+	{
+		var element, fileInput;
+
+		for ( var i in elements )
+		{
+			element = elements[ i ];
+
+			if ( element.type == 'hbox' || element.type == 'vbox' )
+				attachFileBrowser( editor, dialogName, definition, element.children );
+
+			if ( !element.filebrowser )
+				continue;
+
+			if ( typeof element.filebrowser == 'string' )
+			{
+				var fb =
+				{
+					action : ( element.type == 'fileButton' ) ? 'QuickUpload' : 'Browse',
+					target : element.filebrowser
+				};
+				element.filebrowser = fb;
+			}
+
+			if ( element.filebrowser.action == 'Browse' )
+			{
+				var url = element.filebrowser.url || editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'BrowseUrl' ]
+							|| editor.config.filebrowserBrowseUrl;
+
+				if ( url )
+				{
+					element.onClick = browseServer;
+					element.filebrowser.url = url;
+					element.hidden = false;
+				}
+			}
+			else if ( element.filebrowser.action == 'QuickUpload' && element[ 'for' ] )
+			{
+				url =  element.filebrowser.url || editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'UploadUrl' ]
+							|| editor.config.filebrowserUploadUrl;
+
+				if ( url )
+				{
+					element.onClick = uploadFile;
+					element.filebrowser.url = url;
+					element.hidden = false;
+					setupFileElement( editor, definition.getContents( element[ 'for' ][ 0 ] ).get( element[ 'for' ][ 1 ] ), element.filebrowser );
+				}
+			}
+		}
+	}
+
+	/**
+	 * Updates the target element with the url of uploaded/selected file.
+	 *
+	 * @param {String}
+	 *            url The url of a file.
+	 */
+	function updateTargetElement( url, sourceElement )
+	{
+		var dialog = sourceElement.getDialog();
+		var targetElement = sourceElement.filebrowser.target || null;
+		url = url.replace( /#/g, '%23' );
+
+		// If there is a reference to targetElement, update it.
+		if ( targetElement )
+		{
+			var target = targetElement.split( ':' );
+			var element = dialog.getContentElement( target[ 0 ], target[ 1 ] );
+			if ( element )
+			{
+				element.setValue( url );
+				dialog.selectPage( target[ 0 ] );
+			}
+		}
+	}
+
+	/**
+	 * Returns true if filebrowser is configured in one of the elements.
+	 *
+	 * @param {CKEDITOR.dialog.dialogDefinitionObject}
+	 *            definition Dialog definition.
+	 * @param String
+	 *            tabId The tab id where element(s) can be found.
+	 * @param String
+	 *            elementId The element id (or ids, separated with a semicolon) to check.
+	 */
+	function isConfigured( definition, tabId, elementId )
+	{
+		if ( elementId.indexOf( ";" ) !== -1 )
+		{
+			var ids = elementId.split( ";" );
+			for ( var i = 0 ; i < ids.length ; i++ )
+			{
+				if ( isConfigured( definition, tabId, ids[i]) )
+					return true;
+			}
+			return false;
+		}
+
+		return ( definition.getContents( tabId ).get( elementId ).filebrowser && definition.getContents( tabId ).get( elementId ).filebrowser.url );
+	}
+
+	function setUrl( fileUrl, data )
+	{
+		var dialog = this._.filebrowserSe.getDialog(),
+			targetInput = this._.filebrowserSe[ 'for' ],
+			onSelect = this._.filebrowserSe.filebrowser.onSelect;
+
+		if ( targetInput )
+			dialog.getContentElement( targetInput[ 0 ], targetInput[ 1 ] ).reset();
+
+		if ( onSelect && onSelect.call( this._.filebrowserSe, fileUrl, data ) === false )
+			return;
+
+		// The "data" argument may be used to pass the error message to the editor.
+		if ( typeof data == 'string' && data )
+			alert( data );
+
+		if ( fileUrl )
+			updateTargetElement( fileUrl, this._.filebrowserSe );
+	}
+
+	CKEDITOR.plugins.add( 'filebrowser',
+	{
+		init : function( editor, pluginPath )
+		{
+			editor._.filebrowserFn = CKEDITOR.tools.addFunction( setUrl, editor );
+
+			CKEDITOR.on( 'dialogDefinition', function( evt )
+			{
+				// Associate filebrowser to elements with 'filebrowser' attribute.
+				for ( var i in evt.data.definition.contents )
+				{
+					attachFileBrowser( evt.editor, evt.data.name, evt.data.definition, evt.data.definition.contents[ i ].elements );
+					if ( evt.data.definition.contents[ i ].hidden && evt.data.definition.contents[ i ].filebrowser )
+					{
+						evt.data.definition.contents[ i ].hidden =
+							!isConfigured( evt.data.definition, evt.data.definition.contents[ i ][ 'id' ], evt.data.definition.contents[ i ].filebrowser );
+					}
+				}
+			} );
+		}
+	} );
+
+} )();