org.apache.wicket.markup.head.CssUrlReferenceHeaderItem Maven / Gradle / Ivy

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Wicket is a Java web application framework that takes simplicity, separation of concerns and ease of development to a whole new level. Wicket pages can be mocked up, previewed and later revised using standard WYSIWYG HTML design tools. Dynamic content processing and form handling is all handled in Java code using a first-class component model backed by POJO data beans that can easily be persisted using your favorite technology.

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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.apache.wicket.markup.head;

import java.util.Arrays;

import org.apache.wicket.request.Response;
import org.apache.wicket.request.UrlUtils;
import org.apache.wicket.request.cycle.RequestCycle;

/**
 * {@link HeaderItem} for style tags that are rendered using a fixed URL, for example resources from
 * an external site or context relative urls.
 * 
 * @author papegaaij
 */
public class CssUrlReferenceHeaderItem extends CssHeaderItem
{
	private final String url;
	private final String media;

	/**
	 * Creates a new {@code CSSUrlReferenceHeaderItem}.
	 * 
	 * @param url
	 *            context-relative url of the CSS resource
	 * @param media
	 *            the media type for this CSS ("print", "screen", etc.)
	 * @param condition
	 *            the condition to use for Internet Explorer conditional comments. E.g. "IE 7".
	 */
	public CssUrlReferenceHeaderItem(String url, String media, String condition)
	{
		super(condition);
		this.url = url;
		this.media = media;
	}

	/**
	 * @return context-relative url of the CSS resource
	 */
	public String getUrl()
	{
		return url;
	}

	/**
	 * @return the media type for this CSS ("print", "screen", etc.)
	 */
	public String getMedia()
	{
		return media;
	}

	@Override
	public void render(Response response)
	{
		internalRenderCSSReference(response,
			UrlUtils.rewriteToContextRelative(getUrl(), RequestCycle.get()), getMedia(),
			getCondition());
	}

	@Override
	public Iterable getRenderTokens()
	{
		return Arrays.asList("css-" +
			UrlUtils.rewriteToContextRelative(getUrl(), RequestCycle.get()) + "-" + media);
	}

	@Override
	public String toString()
	{
		return "CSSUrlReferenceHeaderItem(" + getUrl() + ")";
	}

	@Override
	public int hashCode()
	{
		return getUrl().hashCode();
	}

	@Override
	public boolean equals(Object obj)
	{
		if (obj instanceof CssUrlReferenceHeaderItem)
			return ((CssUrlReferenceHeaderItem)obj).getUrl().equals(getUrl());
		return false;
	}
}