BookmarkLabelProvider


1   /*******************************************************************************
2    * Copyright (c) 2000, 2006 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  
12  package org.eclipse.ui.views.bookmarkexplorer;
13  
14  import org.eclipse.core.resources.IMarker;
15  import org.eclipse.core.runtime.IPath;
16  import org.eclipse.jface.resource.ImageDescriptor;
17  import org.eclipse.jface.resource.JFaceResources;
18  import org.eclipse.jface.viewers.ITableLabelProvider;
19  import org.eclipse.jface.viewers.LabelProvider;
20  import org.eclipse.osgi.util.NLS;
21  import org.eclipse.swt.graphics.Image;
22  import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
23  import org.eclipse.ui.internal.views.bookmarkexplorer.BookmarkMessages;
24  
25  /**
26   * Provides labels for the bookmark navigator table
27   */
28  class BookmarkLabelProvider extends LabelProvider implements
29          ITableLabelProvider {
30  
31      private Image image;
32      private ImageDescriptor desc;
33  
34      final static int COLUMN_ICON = 0;
35  
36      final static int COLUMN_DESCRIPTION = 1;
37  
38      final static int COLUMN_RESOURCE = 2;
39  
40      final static int COLUMN_FOLDER = 3;
41  
42      final static int COLUMN_LOCATION = 4;
43  
44      public BookmarkLabelProvider(BookmarkNavigator view) {
45          desc = IDEWorkbenchPlugin.getIDEImageDescriptor("obj16/bkmrk_tsk.gif"); //$NON-NLS-1$
46          image = JFaceResources.getResources().createImageWithDefault(desc);
47      }
48  
49      /* (non-Javadoc)
50       * Method declared on LabelProvider.
51       */
52      public void dispose() {
53          if (image != null) {
54              JFaceResources.getResources().destroyImage(desc);
55              image = null;
56          }
57      }
58  
59      /* (non-Javadoc)
60       * Method declared on LabelProvider.
61       */
62      public Image getImage(Object   element) {
63          return image;
64      }
65  
66      public String   getColumnText(Object   element, int columnIndex) {
67          if (!(element instanceof IMarker)) {
68              return ""; //$NON-NLS-1$
69          }
70          IMarker marker = (IMarker) element;
71  
72          switch (columnIndex) {
73          case COLUMN_DESCRIPTION:
74              return marker.getAttribute(IMarker.MESSAGE, ""); //$NON-NLS-1$
75          case COLUMN_RESOURCE:
76              return marker.getResource().getName();
77          case COLUMN_FOLDER:
78              return getContainerName(marker);
79          case COLUMN_LOCATION: {
80              int line = marker.getAttribute(IMarker.LINE_NUMBER, -1);
81              if (line == -1) {
82                  return ""; //$NON-NLS-1$
83              }
84              return NLS.bind(BookmarkMessages.LineIndicator_text, String.valueOf(line));
85          }
86          }
87          return ""; //$NON-NLS-1$ 
88      }
89  
90      public Image getColumnImage(Object   element, int index) {
91          if (index == COLUMN_ICON) {
92              return image;
93          }
94          return null;
95      }
96  
97      /**
98       * Returns the container name if it is defined, or empty string if not.
99       */
100     public static String   getContainerName(IMarker marker) {
101         IPath path = marker.getResource().getFullPath();
102         int n = path.segmentCount() - 1;
103         // n is the number of segments in container, not path
104         if (n <= 0) {
105             return ""; //$NON-NLS-1$
106         }
107         int len = 0;
108         for (int i = 0; i < n; ++i) {
109             len += path.segment(i).length();
110         }
111         // account for /'s
112         if (n > 1) {
113             len += n - 1;
114         }
115         StringBuffer   sb = new StringBuffer  (len);
116         for (int i = 0; i < n; ++i) {
117             if (i != 0) {
118                 sb.append('/');
119             }
120             sb.append(path.segment(i));
121         }
122         return sb.toString();
123     }
124 }
125
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