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 java.io.Serializable; 020import java.util.Collections; 021import java.util.List; 022 023import org.apache.wicket.markup.ComponentTag; 024import org.apache.wicket.markup.html.CrossOrigin; 025import org.apache.wicket.model.IModel; 026import org.apache.wicket.model.Model; 027 028/** 029 * A component which displays external images within a picture tag. 030 * 031 * @see org.apache.wicket.markup.html.image.Source 032 * 033 * @author Tobias Soloschenko 034 * @author Sebastien Briquet 035 * @author Sven Meier 036 * @author Martin Grigorov 037 * 038 */ 039public class ExternalSource extends ExternalImage 040{ 041 042 private static final long serialVersionUID = 1L; 043 044 private String media = null; 045 046 /** 047 * Creates an external source 048 * 049 * @param id 050 * the component id 051 */ 052 public ExternalSource(String id) 053 { 054 super(id, null, Model.ofList(Collections.<Serializable> emptyList())); 055 } 056 057 /** 058 * Creates an external source 059 * 060 * @param id 061 * the component id 062 * @param srcSet 063 * a list of URLs placed in the srcset attribute 064 */ 065 public ExternalSource(String id, List<Serializable> srcSet) 066 { 067 super(id, null, Model.ofList(srcSet)); 068 } 069 070 /** 071 * Creates an external source 072 * 073 * @param id 074 * the component id 075 * @param srcSetModel 076 * a model list of URLs placed in the srcset attribute 077 */ 078 public ExternalSource(String id, IModel<List<Serializable>> srcSetModel) 079 { 080 super(id, null, srcSetModel); 081 } 082 083 @Override 084 protected void onComponentTag(ComponentTag tag) 085 { 086 checkComponentTag(tag, "source"); 087 super.onComponentTag(tag); 088 if (getMedia() != null) 089 { 090 tag.put("media", getMedia()); 091 } 092 } 093 094 /** 095 * Sets the media attribute information 096 * 097 * @param media 098 * the media attribute information 099 */ 100 public void setMedia(String media) 101 { 102 this.media = media; 103 } 104 105 /** 106 * Gets the media attribute information 107 * 108 * @return the media attribute information 109 */ 110 public String getMedia() 111 { 112 return media; 113 } 114 115 /** 116 * Unsupported for source tag 117 */ 118 @Override 119 public void setCrossOrigin(CrossOrigin crossorigin) 120 { 121 throw new UnsupportedOperationException( 122 "It is not allowed to set the crossorigin attribute for source tag"); 123 } 124 125 /** 126 * Unsupported for source tag 127 */ 128 @Override 129 public final CrossOrigin getCrossOrigin() 130 { 131 return null; 132 } 133}