net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/viewsupport/StorageLabelProvider.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.viewsupport;
  12
  13 import java.util.HashMap;
  14 import java.util.Iterator;
  15 import java.util.Map;
  16
  17 import org.eclipse.core.resources.IStorage;
  18 import org.eclipse.core.runtime.IPath;
  19 import org.eclipse.jface.resource.ImageDescriptor;
  20 import org.eclipse.jface.viewers.LabelProvider;
  21 import org.eclipse.swt.graphics.Image;
  22 import org.eclipse.ui.IEditorRegistry;
  23 import org.eclipse.ui.IFileEditorMapping;
  24 import org.eclipse.ui.PlatformUI;
  25
  26 /**
  27  * Standard label provider for IStorage objects. Use this class when you want to
  28  * present IStorage objects in a viewer.
  29  */
  30 public class StorageLabelProvider extends LabelProvider {
  31
  32         private IEditorRegistry fEditorRegistry = PlatformUI.getWorkbench()
  33                         .getEditorRegistry();
  34
  35         private Map fJarImageMap = new HashMap(10);
  36
  37         private Image fDefaultImage;
  38
  39         /*
  40          * (non-Javadoc)
  41          *
  42          * @see ILabelProvider#getImage
  43          */
  44         public Image getImage(Object element) {
  45                 if (element instanceof IStorage)
  46                         return getImageForJarEntry((IStorage) element);
  47
  48                 return super.getImage(element);
  49         }
  50
  51         /*
  52          * (non-Javadoc)
  53          *
  54          * @see ILabelProvider#getText
  55          */
  56         public String getText(Object element) {
  57                 if (element instanceof IStorage)
  58                         return ((IStorage) element).getName();
  59
  60                 return super.getText(element);
  61         }
  62
  63         /*
  64          * (non-Javadoc)
  65          *
  66          * @see IBaseLabelProvider#dispose
  67          */
  68         public void dispose() {
  69                 if (fJarImageMap != null) {
  70                         Iterator each = fJarImageMap.values().iterator();
  71                         while (each.hasNext()) {
  72                                 Image image = (Image) each.next();
  73                                 image.dispose();
  74                         }
  75                         fJarImageMap = null;
  76                 }
  77                 if (fDefaultImage != null)
  78                         fDefaultImage.dispose();
  79                 fDefaultImage = null;
  80         }
  81
  82         /*
  83          * Gets and caches an image for a JarEntryFile. The image for a JarEntryFile
  84          * is retrieved from the EditorRegistry.
  85          */
  86         private Image getImageForJarEntry(IStorage element) {
  87                 if (fJarImageMap == null)
  88                         return getDefaultImage();
  89
  90                 if (element == null || element.getName() == null)
  91                         return getDefaultImage();
  92
  93                 // Try to find icon for full name
  94                 String name = element.getName();
  95                 Image image = (Image) fJarImageMap.get(name);
  96                 if (image != null)
  97                         return image;
  98                 IFileEditorMapping[] mappings = fEditorRegistry.getFileEditorMappings();
  99                 int i = 0;
 100                 while (i < mappings.length) {
 101                         if (mappings[i].getLabel().equals(name))
 102                                 break;
 103                         i++;
 104                 }
 105                 String key = name;
 106                 if (i == mappings.length) {
 107                         // Try to find icon for extension
 108                         IPath path = element.getFullPath();
 109                         if (path == null)
 110                                 return getDefaultImage();
 111                         key = path.getFileExtension();
 112                         if (key == null)
 113                                 return getDefaultImage();
 114                         image = (Image) fJarImageMap.get(key);
 115                         if (image != null)
 116                                 return image;
 117                 }
 118
 119                 // Get the image from the editor registry
 120                 ImageDescriptor desc = fEditorRegistry.getImageDescriptor(name);
 121                 image = desc.createImage();
 122
 123                 fJarImageMap.put(key, image);
 124
 125                 return image;
 126         }
 127
 128         private Image getDefaultImage() {
 129                 if (fDefaultImage == null)
 130                         fDefaultImage = fEditorRegistry.getImageDescriptor((String) null)
 131                                         .createImage();
 132                 return fDefaultImage;
 133         }
 134 }