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/*******************************************************************************
* Copyright (c) 2007 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Robert Fuhrer (rfuhrer@watson.ibm.com) - initial API and implementation
*******************************************************************************/
package org.eclipse.imp.editor;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.IEditorRegistry;
import org.eclipse.ui.IFileEditorMapping;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;
/**
* Standard label provider for IStorage objects.
* Use this class when you want to present IStorage objects in a viewer.
* Copied from JDT/UI internal package.
*/
public class StorageLabelProvider extends LabelProvider {
private IEditorRegistry fEditorRegistry= null;
private Map fJarImageMap= new HashMap(10);
private Image fDefaultImage;
private IEditorRegistry getEditorRegistry() {
if (fEditorRegistry == null)
fEditorRegistry= PlatformUI.getWorkbench().getEditorRegistry();
return fEditorRegistry;
}
/* (non-Javadoc)
* @see ILabelProvider#getImage
*/
public Image getImage(Object element) {
if (element instanceof IStorage)
return getImageForJarEntry((IStorage)element);
return super.getImage(element);
}
/* (non-Javadoc)
* @see ILabelProvider#getText
*/
public String getText(Object element) {
if (element instanceof IStorage)
return ((IStorage)element).getName();
return super.getText(element);
}
/* (non-Javadoc)
*
* @see IBaseLabelProvider#dispose
*/
public void dispose() {
if (fJarImageMap != null) {
Iterator each= fJarImageMap.values().iterator();
while (each.hasNext()) {
Image image= (Image)each.next();
image.dispose();
}
fJarImageMap= null;
}
fDefaultImage= null;
}
/*
* Gets and caches an image for a JarEntryFile.
* The image for a JarEntryFile is retrieved from the EditorRegistry.
*/
private Image getImageForJarEntry(IStorage element) {
if (fJarImageMap == null)
return getDefaultImage();
if (element == null || element.getName() == null)
return getDefaultImage();
// Try to find icon for full name
String name= element.getName();
Image image= (Image)fJarImageMap.get(name);
if (image != null)
return image;
IFileEditorMapping[] mappings= getEditorRegistry().getFileEditorMappings();
int i= 0;
while (i < mappings.length) {
if (mappings[i].getLabel().equals(name))
break;
i++;
}
String key= name;
if (i == mappings.length) {
// Try to find icon for extension
IPath path= element.getFullPath();
if (path == null)
return getDefaultImage();
key= path.getFileExtension();
if (key == null)
return getDefaultImage();
image= (Image)fJarImageMap.get(key);
if (image != null)
return image;
}
// Get the image from the editor registry
ImageDescriptor desc= getEditorRegistry().getImageDescriptor(name);
image= desc.createImage();
fJarImageMap.put(key, image);
return image;
}
private Image getDefaultImage() {
if (fDefaultImage == null)
fDefaultImage= PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_FILE);
return fDefaultImage;
}
}
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