org.wicketstuff.datetime.extensions.yui.YuiLib.java Source code

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Here is the source code for org.wicketstuff.datetime.extensions.yui.YuiLib.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.wicketstuff.datetime.extensions.yui;

import org.apache.wicket.Application;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.request.resource.PackageResourceReference;
import org.apache.wicket.request.resource.ResourceReference;

/**
 * Use the {@link #load(org.apache.wicket.markup.head.IHeaderResponse)} method to initialize the YUI library using the YUI loader.
 * It is OK to call this multiple times.
 * 
 * By default the resource stream gets gzipped. You may disable it via
 * Application.get().getResourceSettings().getDisableGZipCompression()
 * 
 * @author eelcohillenius
 */
public final class YuiLib {
    private static ResourceReference YUILOADER;

    /**
     * Load the YUI loader script. After that, you can declare YUI dependencies using
     * YAHOO.util.YUILoader.
     * 
     * @param response
     *            header response
     */
    public static void load(IHeaderResponse response) {
        response.render(JavaScriptHeaderItem.forReference(getYuiLoader()));
    }

    private static ResourceReference getYuiLoader() {
        if (YUILOADER == null) {
            StringBuilder sb = new StringBuilder("yuiloader/yuiloader");
            if (Application.get().usesDeploymentConfig()) {
                sb.append("-min");
            }
            sb.append(".js");
            YUILOADER = new PackageResourceReference(YuiLib.class, sb.toString());
        }
        return YUILOADER;
    }

    /**
     * Prevent construction.
     */
    private YuiLib() {
    }
}