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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.gwt.client.util;

import com.google.gwt.core.client.JavaScriptObject;

/**
 * Helper class used to create a native Javascript function to call into GWT code.

*/ public class CmsScriptCallbackHelper { /** The stored arguments. */ protected JavaScriptObject m_arguments; /** * Creates a native JS function which, when executed, calls this object's run() method.

* * @return the JS function */ public native JavaScriptObject createCallback() /*-{ var self = this; return function() { [email protected]::setArguments(Lcom/google/gwt/core/client/JavaScriptObject;)(arguments); [email protected]::run()(); } }-*/; /** * Installs the Javascript function generated by this helper as a global function, i.e. an attribute on 'window'.

* * @param name the function name */ public void installCallbackOnWindow(String name) { CmsJsUtil.setAttribute(CmsJsUtil.getWindow(), name, createCallback()); } /** * This method is called by the callback created by createCallback().

*/ public void run() { // override this method to put actual logic here } /** * Sets the function arguments so they can be accessed later in the run() method.

* * @param arguments the function arguments */ public void setArguments(JavaScriptObject arguments) { m_arguments = arguments; } }





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