NavigatorImages


1   /*******************************************************************************
2    * Copyright (c) 2003, 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  package org.eclipse.ui.internal.navigator;
12  
13  import java.net.MalformedURLException  ;
14  import java.net.URL  ;
15  import java.util.Collections  ;
16  
17  import org.eclipse.core.runtime.FileLocator;
18  import org.eclipse.core.runtime.Path;
19  import org.eclipse.jface.resource.ImageDescriptor;
20  import org.eclipse.jface.resource.ImageRegistry;
21  import org.eclipse.swt.graphics.Image;
22  
23  /**
24   *  
25   * 
26   * @since 3.2
27   */
28  public class NavigatorImages {
29  
30      // Create image registry
31      private final static ImageRegistry NAVIGATOR_PLUGIN_REGISTRY = NavigatorPlugin
32              .getDefault().getImageRegistry();
33  
34      private static URL   ICONS_LOCATION;
35      static {
36          ICONS_LOCATION = FileLocator.find(NavigatorPlugin.getDefault()
37                  .getBundle(), new Path("icons/full/"), Collections.EMPTY_MAP); //$NON-NLS-1$  
38      }
39  
40      /**
41       * Gets the current image.
42       * 
43       * @param key
44       *            Name of the icon.
45       * @return Image
46       */
47      public static Image get(String   key) {
48          return NAVIGATOR_PLUGIN_REGISTRY.get(key);
49      }
50  
51      /**
52       * Create and returns a image descriptor and adds the image to the
53       * registery.
54       * 
55       * @param prefix
56       *            Icon dir structure.
57       * @param name
58       *            The name of the icon.
59       * @return ImageDescriptor
60       */
61      public static ImageDescriptor createManaged(String   prefix, String   name) {
62          ImageDescriptor result = ImageDescriptor.createFromURL(makeIconFileURL(
63                  prefix, name));
64          NAVIGATOR_PLUGIN_REGISTRY.put(name, result);
65          return result;
66      }
67  
68      /**
69       * Creates the icon url
70       * 
71       * @param prefix
72       *            Icon dir structure.
73       * @param name
74       *            The name of the icon.
75       * @return URL
76       */
77      private static URL   makeIconFileURL(String   prefix, String   name) {
78          StringBuffer   buffer = new StringBuffer  (prefix);
79          buffer.append(name);
80          try {
81              return new URL  (ICONS_LOCATION, buffer.toString());
82          } catch (MalformedURLException   ex) {
83              return null;
84          }
85      }
86  }
87
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