/*
* 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 java.util.Collections;
import java.util.Objects;
import org.apache.wicket.request.Response;
import org.apache.wicket.core.util.string.CssUtils;
import org.apache.wicket.util.string.Strings;
/**
* {@link HeaderItem} for internal (embedded in the header) css content.
*
* @author papegaaij
*/
public class CssContentHeaderItem extends CssHeaderItem
{
private final CharSequence css;
/**
* Creates a new {@code CSSContentHeaderItem}.
*
* @param css
* css content to be rendered.
* @param id
* unique id for the <style> element. This can be <code>null</code>, however in
* that case the ajax header contribution can't detect duplicate CSS fragments.
*/
public CssContentHeaderItem(CharSequence css, String id, String condition)
{
super(condition);
this.css = css;
setId(id);
}
/**
* @return the css content to be rendered.
*/
public CharSequence getCss()
{
return css;
}
@Override
public void render(Response response)
{
boolean hasCondition = Strings.isEmpty(getCondition()) == false;
if (hasCondition)
{
response.write("<!--[if ");
response.write(getCondition());
response.write("]>");
}
CssUtils.writeCss(response, getCss(), getId());
if (hasCondition)
{
response.write("<![endif]-->\n");
}
}
@Override
public Iterable<?> getRenderTokens()
{
if (Strings.isEmpty(getId()))
return Collections.singletonList(getCss());
return Arrays.asList(getId(), getCss());
}
@Override
public String toString()
{
return "CSSHeaderItem(" + getCss() + ")";
}
@Override
public boolean equals(Object o)
{
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
CssContentHeaderItem that = (CssContentHeaderItem) o;
return Objects.equals(css, that.css);
}
@Override
public int hashCode()
{
return Objects.hash(css);
}
}