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
  21 import org.eclipse.swt.graphics.Image;
  22
  23 import org.eclipse.jface.resource.ImageDescriptor;
  24 import org.eclipse.jface.viewers.LabelProvider;
  25
  26 import org.eclipse.ui.IEditorRegistry;
  27 import org.eclipse.ui.IFileEditorMapping;
  28 import org.eclipse.ui.PlatformUI;
  29
  30 /**
  31  * Standard label provider for IStorage objects.
  32  * Use this class when you want to present IStorage objects in a viewer.
  33  */
  34 public class StorageLabelProvider extends LabelProvider {
  35
  36         private IEditorRegistry fEditorRegistry= PlatformUI.getWorkbench().getEditorRegistry();
  37         private Map fJarImageMap= new HashMap(10);
  38         private Image fDefaultImage;
  39
  40         /* (non-Javadoc)
  41          * @see ILabelProvider#getImage
  42          */
  43         public Image getImage(Object element) {
  44                 if (element instanceof IStorage)
  45                         return getImageForJarEntry((IStorage)element);
  46
  47                 return super.getImage(element);
  48         }
  49
  50         /* (non-Javadoc)
  51          * @see ILabelProvider#getText
  52          */
  53         public String getText(Object element) {
  54                 if (element instanceof IStorage)
  55                         return ((IStorage)element).getName();
  56
  57                 return super.getText(element);
  58         }
  59
  60         /* (non-Javadoc)
  61          *
  62          * @see IBaseLabelProvider#dispose
  63          */
  64         public void dispose() {
  65                 if (fJarImageMap != null) {
  66                         Iterator each= fJarImageMap.values().iterator();
  67                         while (each.hasNext()) {
  68                                 Image image= (Image)each.next();
  69                                 image.dispose();
  70                         }
  71                         fJarImageMap= null;
  72                 }
  73                 if (fDefaultImage != null)
  74                         fDefaultImage.dispose();
  75                 fDefaultImage= null;
  76         }
  77
  78         /*
  79          * Gets and caches an image for a JarEntryFile.
  80          * The image for a JarEntryFile is retrieved from the EditorRegistry.
  81          */
  82         private Image getImageForJarEntry(IStorage element) {
  83                 if (fJarImageMap == null)
  84                         return getDefaultImage();
  85
  86                 if (element == null || element.getName() == null)
  87                         return getDefaultImage();
  88
  89                 // Try to find icon for full name
  90                 String name= element.getName();
  91                 Image image= (Image)fJarImageMap.get(name);
  92                 if (image != null)
  93                         return image;
  94                 IFileEditorMapping[] mappings= fEditorRegistry.getFileEditorMappings();
  95                 int i= 0;
  96                 while (i < mappings.length) {
  97                         if (mappings[i].getLabel().equals(name))
  98                                 break;
  99                         i++;
 100                 }
 101                 String key= name;
 102                 if (i == mappings.length) {
 103                         // Try to find icon for extension
 104                         IPath path= element.getFullPath();
 105                         if (path == null)
 106                                 return getDefaultImage();
 107                         key= path.getFileExtension();
 108                         if (key == null)
 109                                 return getDefaultImage();
 110                         image= (Image)fJarImageMap.get(key);
 111                         if (image != null)
 112                                 return image;
 113                 }
 114
 115                 // Get the image from the editor registry
 116                 ImageDescriptor desc= fEditorRegistry.getImageDescriptor(name);
 117                 image= desc.createImage();
 118
 119                 fJarImageMap.put(key, image);
 120
 121                 return image;
 122         }
 123
 124         private Image getDefaultImage() {
 125                 if (fDefaultImage == null)
 126                         fDefaultImage= fEditorRegistry.getImageDescriptor((String)null).createImage();
 127                 return fDefaultImage;
 128         }
 129 }