View Javadoc
1 /* 2 * Copyright (c) 2003 Scott Howlett & Paul Libbrecht. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. The end-user documentation included with the redistribution, 18 * if any, must include the following acknowledgment: 19 * "This product includes software developed by the Xwing 20 * Project ( http://xwing.sourceforge.net/ )." 21 * Alternately, this acknowledgment may appear in the software itself, 22 * if and wherever such third-party acknowledgments normally appear. 23 * 24 * 4. The name "Xwing" must not be used to endorse or promote products 25 * derived from this software without prior written permission. For 26 * written permission, please contact the project authors via 27 * the Xwing project site, http://xwing.sourceforge.net/ . 28 * 29 * 5. Products derived from this software may not be called "Xwing", 30 * nor may "Xwing" appear in their name, without prior written 31 * permission of the Xwing project. 32 * 33 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 34 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 36 * DISCLAIMED. IN NO EVENT SHALL THE XWING AUTHORS OR THE PROJECT 37 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 40 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 41 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 42 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 43 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 * 46 * For more information on Xwing, please see 47 * < http://xwing.sourceforge.net/ >. 48 */ 49 package net.sourceforge.xwing.jelly.tags.dom; 50 51 import org.apache.commons.jelly.JellyContext; 52 import org.apache.commons.jelly.JellyTagException; 53 import org.apache.commons.jelly.MissingAttributeException; 54 import org.apache.commons.jelly.Script; 55 import org.apache.commons.jelly.TagSupport; 56 import org.apache.commons.jelly.XMLOutput; 57 import org.apache.commons.logging.LogFactory; 58 import org.w3c.dom.Node; 59 import org.w3c.dom.events.Event; 60 import org.w3c.dom.events.EventListener; 61 import org.w3c.dom.events.EventTarget; 62 63 public class EventListenerTag extends TagSupport { 64 65 private String var; 66 private Node node; 67 private String type; 68 private String eventVar = "event"; 69 70 public void setVar(String var) { 71 this.var = var; 72 } 73 74 public void setNode(Node node) { 75 this.node = node; 76 } 77 78 public void setType(String type) { 79 this.type = type; 80 } 81 82 public void setEventVar(String eventVar) { 83 this.eventVar = eventVar; 84 } 85 86 public void doTag(final XMLOutput output) 87 throws MissingAttributeException, JellyTagException { 88 89 if (node == null) { 90 throw new MissingAttributeException("node"); 91 } 92 93 if (type == null) { 94 throw new MissingAttributeException("type"); 95 } 96 97 EventListener handler = 98 new ContextEventListener(eventVar, context, getBody()); 99 100 EventTarget tgt = (EventTarget) node; 101 tgt.addEventListener(type, handler, false); 102 103 if (var != null) { 104 context.setVariable(var, handler); 105 } 106 } 107 108 } 109 110 class ContextEventListener implements EventListener { 111 112 private String eventVar; 113 private JellyContext context; 114 private Script script; 115 116 ContextEventListener( 117 String eventVar, 118 JellyContext context, 119 Script script) { 120 this.eventVar = eventVar; 121 this.context = context; 122 this.script = script; 123 } 124 125 public void handleEvent(Event evt) { 126 try { 127 if (eventVar != null) { 128 context.setVariable(eventVar, evt); 129 } 130 script.run(context, XMLOutput.createDummyXMLOutput()); 131 if (eventVar != null) { 132 context.removeVariable(eventVar); 133 } 134 } catch (Exception exc) { 135 LogFactory.getLog(getClass()).error("Error in handleEvent", exc); 136 } 137 } 138 }

This page was automatically generated by Maven