Package org.apache.myfaces.shared_impl.renderkit.html

Source Code of org.apache.myfaces.shared_impl.renderkit.html.HtmlGroupRendererBase

/*
* Copyright 2004 The Apache Software Foundation.
*
* Licensed 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.shared_impl.renderkit.html;

import org.apache.myfaces.shared_impl.renderkit.RendererUtils;

import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.component.html.HtmlPanelGroup;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;

/**
* @author Martin Marinschek
* @version $Revision: $ $Date: $
*          <p/>
*          $Log: $
*/
public class HtmlGroupRendererBase
        extends HtmlRenderer
{
    private static final String LAYOUT_BLOCK_VALUE = "block";

    public boolean getRendersChildren()
    {
        return true;
    }

    public void encodeBegin(FacesContext context, UIComponent component)
            throws IOException
    {
    }

    public void encodeChildren(FacesContext context, UIComponent component)
        throws IOException
    {
    }

    public void encodeEnd(FacesContext context, UIComponent component)
            throws IOException
    {
        ResponseWriter writer = context.getResponseWriter();
        boolean span = false;

        // will be SPAN or DIV, depending on the layout attribute value
        String layoutElement = HTML.SPAN_ELEM;

        HtmlPanelGroup panelGroup = (HtmlPanelGroup) component;

        // if layout is 'block', render DIV instead SPAN
        String layout = panelGroup.getLayout();
        if (layout != null && layout.equals(LAYOUT_BLOCK_VALUE))
        {
            layoutElement = HTML.DIV_ELEM;
        }

        if(component.getId()!=null && !component.getId().startsWith(UIViewRoot.UNIQUE_ID_PREFIX))
        {
            span = true;

            writer.startElement(layoutElement, component);

            HtmlRendererUtils.writeIdIfNecessary(writer, component, context);

            HtmlRendererUtils.renderHTMLAttributes(writer, component, HTML.COMMON_PASSTROUGH_ATTRIBUTES);
        }
        else
        {
            span=HtmlRendererUtils.renderHTMLAttributesWithOptionalStartElement(writer,
                                                                             component,
                                                                             layoutElement,
                                                                             HTML.COMMON_PASSTROUGH_ATTRIBUTES);
        }

        RendererUtils.renderChildren(context, component);
        if (span)
        {
            writer.endElement(layoutElement);
        }
    }

}
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