htmlgrouprenderer.java

来自「一个使用struts+hibernate+spring开发的完的网站源代码。」· Java 代码 · 共 80 行

/*
 * 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.renderkit.html;

import org.apache.myfaces.renderkit.RendererUtils;

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

/**
 * @author Thomas Spiegl (latest modification by $Author: mmarinschek $)
 * @author Manfred Geiler
 * @version $Revision: 1.8 $ $Date: 2004/12/23 13:03:08 $
 */
public class HtmlGroupRenderer
    extends HtmlRenderer
{
    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;

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

            writer.startElement(HTML.SPAN_ELEM, component);

            HtmlRendererUtils.writeIdIfNecessary(writer, component, context);

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

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