net.sourceforge.phpeclipse/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
  14 import java.util.HashMap;
  15 import java.util.Iterator;
  16 import java.util.Map;
  17
  18 import org.eclipse.core.resources.IStorage;
  19 import org.eclipse.core.runtime.IPath;
  20 import org.eclipse.jface.resource.ImageDescriptor;
  21 import org.eclipse.jface.viewers.LabelProvider;
  22 import org.eclipse.swt.graphics.Image;
  23 import org.eclipse.ui.IEditorRegistry;
  24 import org.eclipse.ui.IFileEditorMapping;
  25 import org.eclipse.ui.PlatformUI;
  26
  27 /**
  28  * Standard label provider for IStorage objects.
  29  * Use this class when you want to present IStorage objects in a viewer.
  30  */
  31 public class StorageLabelProvider extends LabelProvider {
  32
  33         private IEditorRegistry fEditorRegistry= PlatformUI.getWorkbench().getEditorRegistry();
  34         private Map fJarImageMap= new HashMap(10);
  35         private Image fDefaultImage;
  36
  37         /* (non-Javadoc)
  38          * @see ILabelProvider#getImage
  39          */
  40         public Image getImage(Object element) {
  41                 if (element instanceof IStorage)
  42                         return getImageForJarEntry((IStorage)element);
  43
  44                 return super.getImage(element);
  45         }
  46
  47         /* (non-Javadoc)
  48          * @see ILabelProvider#getText
  49          */
  50         public String getText(Object element) {
  51                 if (element instanceof IStorage)
  52                         return ((IStorage)element).getName();
  53
  54                 return super.getText(element);
  55         }
  56
  57         /* (non-Javadoc)
  58          *
  59          * @see IBaseLabelProvider#dispose
  60          */
  61         public void dispose() {
  62                 if (fJarImageMap != null) {
  63                         Iterator each= fJarImageMap.values().iterator();
  64                         while (each.hasNext()) {
  65                                 Image image= (Image)each.next();
  66                                 image.dispose();
  67                         }
  68                         fJarImageMap= null;
  69                 }
  70                 if (fDefaultImage != null)
  71                         fDefaultImage.dispose();
  72                 fDefaultImage= null;
  73         }
  74
  75         /*
  76          * Gets and caches an image for a JarEntryFile.
  77          * The image for a JarEntryFile is retrieved from the EditorRegistry.
  78          */
  79         private Image getImageForJarEntry(IStorage element) {
  80                 if (fJarImageMap == null)
  81                         return getDefaultImage();
  82
  83                 if (element == null || element.getName() == null)
  84                         return getDefaultImage();
  85
  86                 // Try to find icon for full name
  87                 String name= element.getName();
  88                 Image image= (Image)fJarImageMap.get(name);
  89                 if (image != null)
  90                         return image;
  91                 IFileEditorMapping[] mappings= fEditorRegistry.getFileEditorMappings();
  92                 int i= 0;
  93                 while (i < mappings.length) {
  94                         if (mappings[i].getLabel().equals(name))
  95                                 break;
  96                         i++;
  97                 }
  98                 String key= name;
  99                 if (i == mappings.length) {
 100                         // Try to find icon for extension
 101                         IPath path= element.getFullPath();
 102                         if (path == null)
 103                                 return getDefaultImage();
 104                         key= path.getFileExtension();
 105                         if (key == null)
 106                                 return getDefaultImage();
 107                         image= (Image)fJarImageMap.get(key);
 108                         if (image != null)
 109                                 return image;
 110                 }
 111
 112                 // Get the image from the editor registry
 113                 ImageDescriptor desc= fEditorRegistry.getImageDescriptor(name);
 114                 image= desc.createImage();
 115
 116                 fJarImageMap.put(key, image);
 117
 118                 return image;
 119         }
 120
 121         private Image getDefaultImage() {
 122                 if (fDefaultImage == null)
 123                         fDefaultImage= fEditorRegistry.getImageDescriptor((String)null).createImage();
 124                 return fDefaultImage;
 125         }
 126 }