org.primefaces.extensions.component.head.ExtHeadRenderer Maven / Gradle / Ivy

/**
 * Copyright 2011-2018 PrimeFaces Extensions
 *
 * 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.primefaces.extensions.component.head;

import java.io.IOException;

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

/**
 * Renderer for the {@link ExtHead} component which extends PF {@link org.primefaces.renderkit.HeadRenderer}.
 * 
 * Ordering of rendered resources:
 * 
 *
 *    - first facet if defined
   - Theme CSS
   - JSF, PF, PF Extensions CSS resources
   - middle facet if defined
   - JSF, PF, PF Extensions JS resources
   - title
   - shortcut icon
   - h:head content (encoded by super class at encodeChildren)
   - last facet if defined
 * 
 *
 * @author Thomas Andraschko / last modified by $Author$
 * @version $Revision$
 * @since 0.2
 */
public class ExtHeadRenderer extends org.primefaces.renderkit.HeadRenderer {

    @Override
    public void encodeEnd(final FacesContext context, final UIComponent component) throws IOException {
        final ResponseWriter writer = context.getResponseWriter();
        final ExtHead extHead = (ExtHead) component;

        // encode title and shortcut icon
        encodeTitle(extHead, writer);
        encodeShortcutIcon(extHead, writer);

        super.encodeEnd(context, component);
    }

    private void encodeTitle(final ExtHead extHead, final ResponseWriter writer) throws IOException {
        if (extHead.getTitle() != null) {
            writer.startElement("title", null);
            writer.writeText(extHead.getTitle(), "title");
            writer.endElement("title");
        }
    }

    private void encodeShortcutIcon(final ExtHead extHead, final ResponseWriter writer) throws IOException {
        if (extHead.getShortcutIcon() != null) {
            writer.startElement("link", null);
            writer.writeAttribute("rel", "shortcut icon", null);
            writer.writeAttribute("href", extHead.getShortcutIcon(), null);
            writer.endElement("link");
        }
    }
}