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.panelstack;
20
21 import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
22 import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
23
24 import javax.faces.component.UIComponent;
25 import javax.faces.context.FacesContext;
26 import java.io.IOException;
27
28
29 /**
30 * @JSFRenderer
31 * renderKitId = "HTML_BASIC"
32 * family = "javax.faces.Panel"
33 * type = "org.apache.myfaces.PanelStack"
34 *
35 * @author <a href="mailto:oliver@rossmueller.com">Oliver Rossmueller</a>
36 * @version $Revision: 990487 $ $Date: 2010-08-28 23:25:48 -0500 (Sat, 28 Aug 2010) $
37 */
38 public class HtmlPanelStackRenderer extends HtmlRenderer
39 {
40
41
42 public void encodeBegin(FacesContext facesContext, UIComponent uiComponent) throws IOException
43 {
44 }
45
46
47 public boolean getRendersChildren()
48 {
49 return true;
50 }
51
52
53 public void encodeChildren(FacesContext facescontext, UIComponent uicomponent) throws IOException
54 {
55 }
56
57
58 public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) throws IOException
59 {
60 RendererUtils.checkParamValidity(facesContext, uiComponent, HtmlPanelStack.class);
61
62 HtmlPanelStack panelStack = (HtmlPanelStack) uiComponent;
63 String selectedPanel = panelStack.getSelectedPanel();
64 UIComponent childToRender = null;
65
66 if (selectedPanel != null && selectedPanel.length() > 0)
67 {
68 // render the selected child
69 childToRender = panelStack.findComponent(selectedPanel);
70 if (childToRender == null)
71 {
72 // if not found, render the first child
73 if (panelStack.getChildCount() > 0) {
74 childToRender = (UIComponent) panelStack.getChildren().get(0);
75 }
76 }
77 }
78 else
79 {
80 // render the first child
81 if (panelStack.getChildCount() > 0) {
82 childToRender = (UIComponent) panelStack.getChildren().get(0);
83 }
84 }
85
86 if (childToRender != null)
87 {
88 RendererUtils.renderChild(facesContext, childToRender);
89 }
90 }
91
92 }