/*

  * 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.renderkit.html;

 import java.io.IOException;

 import javax.faces.component.UIComponent;

 import javax.faces.context.ExternalContext;

 import javax.faces.context.FacesContext;

 import javax.faces.context.ResponseWriter;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFRenderer;

 import org.apache.myfaces.shared_impl.config.MyfacesConfig;

 import org.apache.myfaces.shared_impl.renderkit.html.HTML;

 import org.apache.myfaces.shared_impl.renderkit.html.HtmlFormRendererBase;

 import org.apache.myfaces.shared_impl.renderkit.html.util.JavascriptUtils;

 /**

  *   

  * @author Manfred Geiler (latest modification by $Author: lu4242 $)

  * @author Thomas Spiegl

  * @author Anton Koinov

  * @version $Revision: 693358 $ $Date: 2008-09-08 22:54:29 -0500 (Mon, 08 Sep 2008) $

  */

 @JSFRenderer(

     renderKitId="HTML_BASIC",

     family="javax.faces.Form",

     type="javax.faces.Form")

 public class HtmlFormRenderer

         extends HtmlFormRendererBase

 {

     //private static final Log log = LogFactory.getLog(HtmlFormRenderer.class);

     @Override

     protected void afterFormElementsEnd(FacesContext facesContext,

             UIComponent component) throws IOException {

         super.afterFormElementsEnd(facesContext, component);

         ResponseWriter writer = facesContext.getResponseWriter();

         ExternalContext extContext = facesContext.getExternalContext();

         // If javascript viewstate is enabled write empty hidden input in forms 

         if (JavascriptUtils.isJavascriptAllowed(extContext) && MyfacesConfig.getCurrentInstance(extContext).isViewStateJavascript()) {

             writer.startElement(HTML.INPUT_ELEM, null);

             writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_HIDDEN, null);

             writer.writeAttribute(HTML.NAME_ATTR, HtmlResponseStateManager.VIEW_STATE_PARAM, null);

             writer.writeAttribute(HTML.ID_ATTR, HtmlResponseStateManager.VIEW_STATE_PARAM, null);

             writer.writeAttribute(HTML.VALUE_ATTR, "", null);

             writer.endElement(HTML.INPUT_ELEM);

         }

     }

 }