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 org.opencms.gwt.client.util.CmsDomUtil;
  import org.opencms.ui.components.CmsRichTextArea;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.dom.client.IFrameElement;
  import com.google.gwt.dom.client.Style;
  import com.vaadin.client.ui.VRichTextArea;
  import com.vaadin.client.ui.richtextarea.RichTextAreaConnector;
  import com.vaadin.shared.ui.Connect;
  import com.vaadin.shared.ui.Connect.LoadStyle;
  
  /**
   * Special connector for CmsRichTextArea which adds some styles to the iframe body used in the editor.
   */
  @Connect(value = CmsRichTextArea.class, loadStyle = LoadStyle.LAZY)
  public class CmsRichTextAreaConnector extends RichTextAreaConnector {
  
      /** Serial version id. */
      private static final long serialVersionUID = 1L;
  
      /**
       * @see com.vaadin.client.ui.AbstractComponentConnector#createWidget()
       */
      @Override
      public VRichTextArea createWidget() {
  
          VRichTextArea result = (VRichTextArea)super.createWidget();
          // We can't just add the style here, we have to wait until the iframe is loaded
          result.rta.addInitializeHandler(event -> {
              Element element = result.getElement();
              IFrameElement iframeElement = IFrameElement.as(
                  CmsDomUtil.nodeListToList(element.getElementsByTagName("iframe")).get(0));
              String[][] styles = new String[][] {
                  {"lineHeight", "1.55"},
                  {"fontSize", "14px"},
                  {"fontFamily", "\"Open sans\", sans-serif"}};
              Style styleObj = iframeElement.getContentDocument().getBody().getStyle();
              for (String[] styleEntry : styles) {
                  styleObj.setProperty(styleEntry[0], styleEntry[1]);
              }
          });
          return result;
      }
  
  }
  