/*
    * 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.htmlTag;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import javax.faces.component.UIComponent;
  import javax.faces.component.UIParameter;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.apache.myfaces.component.html.util.HtmlComponentUtils;
  import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
  
  /**
   * @JSFRenderer
   *   renderKitId = "HTML_BASIC" 
   *   family = "javax.faces.Output"
   *   type = "org.apache.myfaces.HtmlTagRenderer"
   * 
   * @author bdudney (latest modification by $Author: lu4242 $)
   * @version $Revision: 1327315 $ $Date: 2012-04-17 17:58:45 -0500 (Tue, 17 Apr 2012) $
   */
  public class HtmlTagRenderer extends HtmlRenderer
  {
      public static final String RENDERER_TYPE = "org.apache.myfaces.HtmlTagRenderer";
  
      public void encodeBegin(FacesContext context, UIComponent component)
              throws IOException
      {
          if ((context == null) || (component == null))
          {
              throw new NullPointerException();
          }
          HtmlTag htmlTag = (HtmlTag) component;
  
          if (htmlTag.isRendered())
          {
              String tag = htmlTag.getValue().toString();
              if( tag.trim().length() == 0 ) // Don't render the tag, but render the children.
                  return;
  
              ResponseWriter writer = context.getResponseWriter();
  
              writer.startElement(tag, htmlTag);
              HtmlRendererUtils.writeIdIfNecessary(writer, htmlTag, context);
  
              // TODO : Use HtmlRendererUtils.renderHTMLAttributes(writer, component, HTML.COMMON_PASSTROUGH_ATTRIBUTES);
              String[] supportedAttributes = {HTML.STYLE_CLASS_ATTR, HTML.STYLE_ATTR};
              HtmlRendererUtils.renderHTMLAttributes(writer, htmlTag, supportedAttributes);
              
              if (htmlTag.getClass().equals(HtmlTag.class))
              {
                  // write additional attributes supplied by f:param tags
                  // Components that extend from HtmlTag component should render attributes
                  // on a proper encodeBegin (see Div component for details) 
                  Map params = getParameterMap(htmlTag);
                  for(Iterator iter = params.entrySet().iterator(); iter.hasNext();)
                  {
                      Entry param = (Entry) iter.next();
                      if (null != param.getValue())
                      {
                          writer.writeAttribute(param.getKey().toString(), param.getValue().toString(), null);
                      }
                  }
              }
          }
      }
      
      public Map getParameterMap(UIComponent component) {
          Map result = new HashMap();
          for (Iterator iter = component.getChildren().iterator(); iter.hasNext();) {
              UIComponent child = (UIComponent) iter.next();
              if (child.getClass().equals(UIParameter.class))  {
                  UIParameter uiparam = (UIParameter) child;
                  Object value = uiparam.getValue();
                 if (value != null) {
                     result.put(uiparam.getName(), value);
                 }
             }
         }
         return result;
     }
 
     public void encodeChildren(FacesContext context, UIComponent component)
             throws IOException
     {
         RendererUtils.renderChildren(context, component);
     }
     
     public boolean getRendersChildren()
     {
         return true;
     }
 
     public void encodeEnd(FacesContext context, UIComponent component)
             throws IOException
     {
         if ((context == null) || (component == null))
         {
             throw new NullPointerException();
         }
         HtmlTag htmlTag = (HtmlTag) component;
 
         if (htmlTag.isRendered())
         {
             String tag = htmlTag.getValue().toString();
             if( tag.trim().length() == 0 )
                 return;
 
             ResponseWriter writer = context.getResponseWriter();
             // force separate end tag
             // -= Leonardo Uribe =- Ensure when to close the end tag
             // using a separate one or not is responsibility of
             // the ResponseWriter implementation provided by the 
             // RenderKit used. This line is invalid
             //writer.writeText("", null);
             writer.endElement( tag );
         }
     }
 }