net.jawr.web.wicket.JawrWicketLinkResolver.java Source code

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Here is the source code for net.jawr.web.wicket.JawrWicketLinkResolver.java

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/**
 * Copyright 2009-2013 Ibrahim Chaehoi
 * 
 * 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 net.jawr.web.wicket;

import org.apache.wicket.Component;
import org.apache.wicket.MarkupContainer;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.markup.WicketTag;
import org.apache.wicket.markup.html.TransparentWebMarkupContainer;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.resolver.IComponentResolver;

/**
 * This class defines a tag resolver which handles <wicket:jawr> tags. The
 * tasks of this resolver will be to : - add a "transparent" WebMarkupContainer
 * to transparently handling child components. - create the right component
 * depending on the tag defined inside <wicket:jawr>
 * 
 * @author Ibrahim Chaehoi
 * 
 */
public class JawrWicketLinkResolver implements IComponentResolver {

    private static final String IMAGE_TAG_NAME = "image";
    private static final String IMG_TAG_NAME = "img";
    /** The serial version UID */
    private static final long serialVersionUID = -2106412613442819122L;

    @Override
    public Component resolve(MarkupContainer container, MarkupStream markupStream, ComponentTag tag) {

        Component component = null;

        // Only component tags have the id == "_jawrAutolink_"
        String tagName = tag.getName();
        if (tag.getId().equals(JawrWicketLinkTagHandler.AUTOLINK_ID)) {

            // create the right component depending on the tag name
            WebMarkupContainer jawrTag = null;
            final String id = tag.getId() + container.getPage().getAutoIndex();
            if (tagName.equalsIgnoreCase(IMG_TAG_NAME)) {
                jawrTag = new JawrImageReference(id);
            } else if (tagName.equalsIgnoreCase("input") && tag.getAttribute("type").equals(IMAGE_TAG_NAME)) {
                jawrTag = new JawrHtmlImageReference(id);
            } else if (tagName.equalsIgnoreCase("script")) {
                jawrTag = new JawrJavascriptReference(id);
            } else if (tagName.equalsIgnoreCase("link")) {
                jawrTag = new JawrStylesheetReference(id);
            }

            if (jawrTag != null) {
                container.autoAdd(jawrTag, markupStream);
            }

            // Yes, we handled the tag
            return jawrTag;
        } else if (tag instanceof WicketTag) {

            // For tag wicket:jawr
            if (tagName.equals("jawr")) {

                final String id = tag.getId() + container.getPage().getAutoIndex();
                component = new TransparentWebMarkupContainer(id);
                component.setRenderBodyOnly(true);
                container.autoAdd(component, markupStream);

                // Yes, we handled the tag
                return component;
            }
        }

        // We were not able to handle the tag
        return null;
    }

}