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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.custom.htmlTag;
20  
21  import java.io.IOException;
22  
23  import javax.faces.component.UIComponent;
24  import javax.faces.context.FacesContext;
25  import javax.faces.context.ResponseWriter;
26  
27  import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
28  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
29  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
30  
31  /**
32   * @JSFRenderer
33   *   renderKitId = "HTML_BASIC" 
34   *   family = "javax.faces.Output"
35   *   type = "org.apache.myfaces.HtmlTagRenderer"
36   * 
37   * @author bdudney (latest modification by $Author: lu4242 $)
38   * @version $Revision: 659874 $ $Date: 2005-05-11 11:47:12 -0400 (Wed, 11 May 2005) $
39   */
40  public class HtmlTagRenderer extends HtmlRenderer
41  {
42      public static final String RENDERER_TYPE = "org.apache.myfaces.HtmlTagRenderer";
43  
44      public void encodeBegin(FacesContext context, UIComponent component)
45              throws IOException
46      {
47          if ((context == null) || (component == null))
48          {
49              throw new NullPointerException();
50          }
51          HtmlTag htmlTag = (HtmlTag) component;
52  
53          if (htmlTag.isRendered())
54          {
55              String tag = htmlTag.getValue().toString();
56              if( tag.trim().length() == 0 ) // Don't render the tag, but render the children.
57                  return;
58  
59              ResponseWriter writer = context.getResponseWriter();
60  
61              writer.startElement(tag, htmlTag);
62              HtmlRendererUtils.writeIdIfNecessary(writer, htmlTag, context);
63  
64              // TODO : Use HtmlRendererUtils.renderHTMLAttributes(writer, component, HTML.COMMON_PASSTROUGH_ATTRIBUTES);
65              String[] supportedAttributes = {HTML.STYLE_CLASS_ATTR, HTML.STYLE_ATTR};
66              HtmlRendererUtils.renderHTMLAttributes(writer, htmlTag, supportedAttributes);
67          }
68      }
69  
70      public void encodeEnd(FacesContext context, UIComponent component)
71              throws IOException
72      {
73          if ((context == null) || (component == null))
74          {
75              throw new NullPointerException();
76          }
77          HtmlTag htmlTag = (HtmlTag) component;
78  
79          if (htmlTag.isRendered())
80          {
81              String tag = htmlTag.getValue().toString();
82              if( tag.trim().length() == 0 )
83                  return;
84  
85              ResponseWriter writer = context.getResponseWriter();
86              writer.endElement( tag );
87          }
88      }
89  }