Coverage report

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org.apache.commons.jelly.tags.jface.DoubleClickListenerTag
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 1  
 /*
 2  
  * Copyright 2002,2004 The Apache Software Foundation.
 3  
  *
 4  
  * Licensed under the Apache License, Version 2.0 (the "License");
 5  
  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  *
 8  
  *      http://www.apache.org/licenses/LICENSE-2.0
 9  
  *
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 package org.apache.commons.jelly.tags.jface;
 17  
 
 18  
 import org.apache.commons.jelly.JellyTagException;
 19  
 import org.apache.commons.jelly.MissingAttributeException;
 20  
 import org.apache.commons.jelly.TagSupport;
 21  
 import org.apache.commons.jelly.XMLOutput;
 22  
 import org.apache.commons.logging.Log;
 23  
 import org.apache.commons.logging.LogFactory;
 24  
 import org.eclipse.jface.viewers.DoubleClickEvent;
 25  
 import org.eclipse.jface.viewers.IDoubleClickListener;
 26  
 import org.eclipse.jface.viewers.StructuredViewer;
 27  
 import org.eclipse.jface.viewers.Viewer;
 28  
 
 29  
 /**
 30  
  * This tag adds a listener for double-clicks in this viewer.
 31  
  *
 32  
  * @author <a href="mailto:ckl@dacelo.nl">Christiaan ten Klooster</a>
 33  
  */
 34  0
 public class DoubleClickListenerTag
 35  
     extends TagSupport
 36  
     implements IDoubleClickListener {
 37  
 
 38  
     /** The Log to which logging calls will be made. */
 39  0
     private static final Log log = LogFactory.getLog(DoubleClickListenerTag.class);
 40  
 
 41  0
     private String var = "event";
 42  
     private XMLOutput output;
 43  
 
 44  
     /*
 45  
      * @see org.apache.commons.jelly.Tag#doTag(org.apache.commons.jelly.XMLOutput)
 46  
      */
 47  
     public void doTag(XMLOutput output)
 48  
         throws MissingAttributeException, JellyTagException {
 49  0
         if (var == null) {
 50  0
             throw new MissingAttributeException("var");
 51  
         }
 52  
 
 53  0
         StructuredViewer viewer = getParentViewer();
 54  0
         if (viewer == null) {
 55  0
             throw new JellyTagException("This tag must be nested within a viewer tag");
 56  
         }
 57  
 
 58  0
         viewer.addDoubleClickListener(this);
 59  0
         this.output = output;
 60  0
     }
 61  
 
 62  
     public StructuredViewer getParentViewer() {
 63  0
         ViewerTag tag = (ViewerTag) findAncestorWithClass(ViewerTag.class);
 64  0
         if (tag != null) {
 65  0
             Viewer viewer = tag.getViewer();
 66  0
             if (viewer instanceof StructuredViewer) {
 67  0
                 return (StructuredViewer) viewer;
 68  
             }
 69  
         }
 70  0
         return null;
 71  
     }
 72  
 
 73  
     /**
 74  
      * @return String
 75  
      */
 76  
     public String getVar() {
 77  0
         return var;
 78  
     }
 79  
 
 80  
     /**
 81  
      * Sets the var.
 82  
      * @param var The var to set
 83  
      */
 84  
     public void setVar(String var) {
 85  0
         this.var = class="keyword">var;
 86  0
     }
 87  
 
 88  
     //  Listener interface
 89  
     //-------------------------------------------------------------------------
 90  
     /*
 91  
      * @see org.eclipse.jface.viewers.IDoubleClickListener#doubleClick(org.eclipse.jface.viewers.DoubleClickEvent)
 92  
      */
 93  
     public void doubleClick(DoubleClickEvent event) {
 94  
         try {
 95  0
             context.setVariable(var, event);
 96  0
             invokeBody(output);
 97  0
         } catch (Exception e) {
 98  0
             log.error(
 99  
                 "Caught exception: " + e + " while processing event: " + event,
 100  
                 e);
 101  
         }
 102  0
     }
 103  
 
 104  
 }

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