com.sun.faces.renderkit.html_basic.GroupRenderer Maven / Gradle / Ivy

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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
There is a newer version: 2.2.20
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */

package com.sun.faces.renderkit.html_basic;

import java.io.IOException;
import java.util.Iterator;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

/**
 * Arbitrary grouping "renderer" that simply renders its children
 * recursively in the encodeEnd() method.
 *
 */
public class GroupRenderer extends HtmlBasicRenderer {

    // ---------------------------------------------------------- Public Methods


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

        rendererParamsNotNull(context, component);

        if (!shouldEncode(component)) {
            return;
        }
        // Render a span around this group if necessary
        String style = (String) component.getAttributes().get("style");
        String styleClass = (String) component.getAttributes().get("styleClass");
        ResponseWriter writer = context.getResponseWriter();

        if (divOrSpan(component)) {
            if (("block".equals(component.getAttributes().get("layout")))) {
                writer.startElement("div", component);
            } else {
                writer.startElement("span", component);
            }
            writeIdAttributeIfNecessary(context, writer, component);
            if (styleClass != null) {
                writer.writeAttribute("class", styleClass, "styleClass");
            }
            if (style != null) {
                writer.writeAttribute("style", style, "style");
            }
        }

    }


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

        rendererParamsNotNull(context, component);

        if (!shouldEncodeChildren(component)) {
            return;
        }

        // Render our children recursively
        Iterator kids = getChildren(component);
        while (kids.hasNext()) {
            encodeRecursive(context, kids.next());
        }

    }


    @Override
    public void encodeEnd(FacesContext context, UIComponent component)
          throws IOException {

        rendererParamsNotNull(context, component);

        if (!shouldEncode(component)) {
            return;
        }

        // Close our span element if necessary
        ResponseWriter writer = context.getResponseWriter();
        if (divOrSpan(component)) {
            if ("block".equals(component.getAttributes().get("layout"))) {
                writer.endElement("div");
            } else {
                writer.endElement("span");
            }
        }

    }


    @Override
    public boolean getRendersChildren() {

        return true;

    }

    // --------------------------------------------------------- Private Methods


    /**
     * @param component UIComponent for this group
     *
     * @return true if we need to render a div or span element
     *  around this group.
     */
    private boolean divOrSpan(UIComponent component) {

        return (shouldWriteIdAttribute(component) ||
            (component.getAttributes().get("style") != null) ||
            (component.getAttributes().get("styleClass") != null));

    }

}