001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.markup.html; 018 019import org.apache.wicket.Component; 020import org.apache.wicket.markup.head.IHeaderResponse; 021import org.apache.wicket.util.io.IClusterable; 022 023/** 024 * An interface to be implemented by {@link org.apache.wicket.behavior.Behavior}s, 025 * {@link org.apache.wicket.ajax.attributes.IAjaxCallListener}s. 026 * 027 * Example: 028 * 029 * <pre> 030 * class MyAjaxCallDecorator implements IAjaxCallListener, IComponentAwareHeaderContributor 031 * { 032 * 033 * // IAjaxCallListener methods omitted for brevity 034 * 035 * public void renderHead(Component component, IHeaderResponse response) 036 * { 037 * response.render(new OnLoadJavaScriptHeaderItem("alert('page loaded!');")); 038 * } 039 * } 040 * </pre> 041 */ 042public interface IComponentAwareHeaderContributor extends IClusterable 043{ 044 /** 045 * Render to the web response whatever the component-aware wants to contribute to the head 046 * section. 047 * 048 * @param component 049 * component which is contributing to the response. This parameter is here to give 050 * the component as the context for component-awares implementing this interface 051 * 052 * @param response 053 * Response object 054 */ 055 void renderHead(Component component, IHeaderResponse response); 056}