org.apache.myfaces.custom.panelstack.HtmlPanelStackRenderer Maven / Gradle / Ivy

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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.

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/*
 * 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.panelstack;

import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import java.io.IOException;


/**
 * @JSFRenderer
 *   renderKitId = "HTML_BASIC" 
 *   family = "javax.faces.Panel"
 *   type = "org.apache.myfaces.PanelStack"
 * 
 * @author Oliver Rossmueller
 * @version $Revision: 990487 $ $Date: 2010-08-28 23:25:48 -0500 (Sat, 28 Aug 2010) $
 */
public class HtmlPanelStackRenderer extends HtmlRenderer
{


    public void encodeBegin(FacesContext facesContext, UIComponent uiComponent) throws IOException
    {
    }


    public boolean getRendersChildren()
    {
        return true;
    }


    public void encodeChildren(FacesContext facescontext, UIComponent uicomponent) throws IOException
    {
    }


    public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) throws IOException
    {
        RendererUtils.checkParamValidity(facesContext, uiComponent, HtmlPanelStack.class);

        HtmlPanelStack panelStack = (HtmlPanelStack) uiComponent;
        String selectedPanel = panelStack.getSelectedPanel();
        UIComponent childToRender = null;

        if (selectedPanel != null && selectedPanel.length() > 0)
        {
            // render the selected child
            childToRender = panelStack.findComponent(selectedPanel);
            if (childToRender == null)
            {
                // if not found, render the first child
                if (panelStack.getChildCount() > 0) {
                    childToRender = (UIComponent) panelStack.getChildren().get(0);
                }
            }
        }
        else
        {
            // render the first child
            if (panelStack.getChildCount() > 0) {
                childToRender = (UIComponent) panelStack.getChildren().get(0);
            }
        }

        if (childToRender != null)
        {
            RendererUtils.renderChild(facesContext, childToRender);
        }
    }

}