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.ui.client;
  
  import com.google.gwt.dom.client.Document;
  import com.google.gwt.dom.client.IFrameElement;
  import com.vaadin.client.ui.VBrowserFrame;
  
  /**
   * Extension of the standard browser frame widget which supports setting the name correctly in Chrome.
   *
   * <p>The difference from the standard implementation is that here the name attribute is set on the iframe
   * element before it is inserted into the DOM, which is necessary in Chrome because setting this attribute
   * in Chrome does not change the corresponding frame window object's 'name' attribute if it already exists.
   */
  public class CmsVBrowserFrame extends VBrowserFrame {
  
      /** The name to set on the iframe element. */
      protected String m_savedName;
  
      /**
       * @see com.vaadin.client.ui.VBrowserFrame#setName(java.lang.String)
       */
      @Override
      public void setName(String name) {
  
          super.setName(name);
          m_savedName = name;
      }
  
      /**
       * Always creates new iframe inside widget. Will replace previous iframe.
       *
       * @return the iframe element
       */
      @Override
      protected IFrameElement createIFrameElement(String src) {
  
          String name = m_savedName;
  
          // Remove alt text
          if (altElement != null) {
              getElement().removeChild(altElement);
              altElement = null;
          }
  
          // Remove old iframe
          if (iframe != null) {
              name = iframe.getAttribute("name");
              getElement().removeChild(iframe);
              iframe = null;
          }
  
          iframe = Document.get().createIFrameElement();
          iframe.setSrc(src);
          iframe.setFrameBorder(0);
          iframe.setAttribute("width", "100%");
          iframe.setAttribute("height", "100%");
  
          iframe.setAttribute("allowTransparency", "true");
          if (name != null) {
              iframe.setName(name);
          }
  
          getElement().appendChild(iframe);
          return iframe;
      }
  
  }
  