content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://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: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://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.<p>
   */
  public class CmsScriptCallbackHelper {
  
      /** The stored arguments. */
      protected JavaScriptObject m_arguments;
  
      /**
       * Creates a native JS function which, when executed, calls this object's run() method.<p>
       *
       * @return the JS function
       */
      public native JavaScriptObject createCallback() /*-{
          var self = this;
          return function() {
              self.@org.opencms.gwt.client.util.CmsScriptCallbackHelper::setArguments(Lcom/google/gwt/core/client/JavaScriptObject;)(arguments);
              self.@org.opencms.gwt.client.util.CmsScriptCallbackHelper::run()();
          }
      }-*/;
  
      /**
       * Installs the Javascript function  generated by this helper as a global function, i.e. an attribute on 'window'.<p>
       *
       * @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().<p>
       */
      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.<p>
       *
       * @param arguments the function arguments
       */
      public void setArguments(JavaScriptObject arguments) {
  
          m_arguments = arguments;
      }
  
  }
  