/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.myfaces.custom.tree.renderkit.html;
  
  import java.io.IOException;
  
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.apache.myfaces.custom.tree.HtmlTreeImageCommandLink;
  import org.apache.myfaces.custom.tree.HtmlTreeNode;
  import org.apache.myfaces.renderkit.html.jsf.ExtendedHtmlLinkRenderer;
  import org.apache.myfaces.renderkit.html.util.DummyFormUtils;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
  
  
  /**
   * @JSFRenderer
   *   renderKitId = "HTML_BASIC" 
   *   family = "org.apache.myfaces.HtmlTree"
   *   type = "org.apache.myfaces.HtmlTreeImageCommandLink"
   * 
   * @author <a href="mailto:oliver@rossmueller.com">Oliver Rossmueller</a>
   * @version $Revision: 659874 $ $Date: 2008-05-24 15:59:15 -0500 (Sat, 24 May 2008) $
   */
  public class HtmlTreeImageCommandLinkRenderer
      extends ExtendedHtmlLinkRenderer {
  
      private static final Integer ZERO = new Integer(0);
  
  
      public void decode(FacesContext facesContext, UIComponent component) {
          super.decode(facesContext, component);
          String clientId = component.getClientId(facesContext);
          String reqValue = (String) facesContext
              .getExternalContext()
              .getRequestParameterMap().get(HtmlRendererUtils
              .getHiddenCommandLinkFieldName(DummyFormUtils.findNestingForm(component, facesContext)));
          if (reqValue != null && reqValue.equals(clientId)) {
              HtmlTreeNode node = (HtmlTreeNode) component.getParent();
  
              node.toggleExpanded();
          }
      }
  
  
      protected void renderCommandLinkStart(FacesContext facesContext,
                                            UIComponent component,
                                            String clientId,
                                            Object value,
                                            String style,
                                            String styleClass) throws IOException {
  
          super.renderCommandLinkStart(facesContext, component, clientId, value, style, styleClass);
  
          String url = ((HtmlTreeImageCommandLink) component).getImage();
  
          if ((url != null) && (url.length() > 0)) {
              ResponseWriter writer = facesContext.getResponseWriter();
              writer.startElement(HTML.IMG_ELEM, component);
              String src = facesContext.getApplication().getViewHandler().getResourceURL(facesContext, url);
              //String src;
              //if (url.startsWith(HTML.HREF_PATH_SEPARATOR))
              //{
              //    String path = facesContext.getExternalContext().getRequestContextPath();
              //    src = path + url;
              //}
              //else
              //{
              //    src = url;
              //}
              //Encode URL
              //Although this is an url url, encodeURL is no nonsense, because the
              //actual url url could also be a dynamic servlet request:
              //src = facesContext.getExternalContext().encodeResourceURL(src);
              writer.writeAttribute(HTML.SRC_ATTR, src, null);
              writer.writeAttribute(HTML.BORDER_ATTR, ZERO, null);
  
              HtmlRendererUtils.renderHTMLAttributes(writer, component, HTML.IMG_PASSTHROUGH_ATTRIBUTES);
  
              writer.endElement(HTML.IMG_ELEM);
         }
     }
 }