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.image; 018 019import org.apache.wicket.Component; 020import org.apache.wicket.behavior.Behavior; 021import org.apache.wicket.markup.ComponentTag; 022import org.apache.wicket.model.IModel; 023import org.apache.wicket.model.Model; 024import org.apache.wicket.request.UrlUtils; 025import org.apache.wicket.request.cycle.RequestCycle; 026 027/** 028 * A behavior that converts the provider url fragment to a context-relative url. For example if the 029 * current url is <code>http://localhost/context/product/1231</code> and the specified url is 030 * <code>images/border.jpg</code> the generated url will be <code>../../images/border.jpg</code> 031 * 032 * @author Igor Vaynberg (ivaynberg) 033 */ 034public class ContextPathGenerator extends Behavior 035{ 036 private static final long serialVersionUID = 1L; 037 038 private final IModel<String> contextRelativePath; 039 040 /** 041 * Constructor 042 * 043 * @param contextRelativePath 044 * context-relative path, eg <code>images/border.jpg</code> 045 */ 046 public ContextPathGenerator(IModel<String> contextRelativePath) 047 { 048 this.contextRelativePath = contextRelativePath; 049 } 050 051 /** 052 * Constructor 053 * 054 * @param contextRelativePath 055 * context-relative path, eg <code>images/border.jpg</code> 056 */ 057 public ContextPathGenerator(String contextRelativePath) 058 { 059 this.contextRelativePath = new Model<String>(contextRelativePath); 060 } 061 062 /** {@inheritDoc} **/ 063 @Override 064 public void onComponentTag(Component component, ComponentTag tag) 065 { 066 // get path 067 final String path = contextRelativePath.getObject(); 068 069 final String rewritten = UrlUtils.rewriteToContextRelative(path, RequestCycle.get()); 070 071 tag.put("src", rewritten); 072 } 073 074 /** {@inheritDoc} **/ 075 @Override 076 public void detach(Component component) 077 { 078 contextRelativePath.detach(); 079 super.detach(component); 080 } 081 082 083}