| /******************************************************************************* |
| * Copyright (c) 2000, 2006 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.dialogs; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.jface.viewers.ITableLabelProvider; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.osgi.util.TextProcessor; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.IFileEditorMapping; |
| |
| /** |
| * A label provider for displaying of <code>IFileEditorMapping</code> |
| * objects in viewers. |
| * <p> |
| * This class has a singleton instance, |
| * <code>FileEditorMappingLabelProvider.INSTANCE</code>, |
| * which can be used any place this kind of label provider is needed. |
| * </p> |
| * <p> |
| * The singleton instance hangs on to images, which get freed up when |
| * <code>dispose</code> is called. |
| * </p> |
| * |
| * @see org.eclipse.jface.viewers.ILabelProvider |
| */ |
| public class FileEditorMappingLabelProvider extends LabelProvider implements |
| ITableLabelProvider { |
| |
| /** |
| * Singleton instance accessor. |
| */ |
| public final static FileEditorMappingLabelProvider INSTANCE = new FileEditorMappingLabelProvider(); |
| |
| /** |
| * Images that will require disposal. |
| */ |
| private List imagesToDispose = new ArrayList(); |
| |
| /** |
| * Creates an instance of this class. The private visibility of this |
| * constructor ensures that this class is only usable as a singleton. |
| */ |
| private FileEditorMappingLabelProvider() { |
| super(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ILabelProvider. |
| */ |
| public void dispose() { |
| super.dispose(); |
| for (Iterator e = imagesToDispose.iterator(); e.hasNext();) { |
| ((Image) e.next()).dispose(); |
| } |
| imagesToDispose.clear(); |
| } |
| |
| /** |
| * The <code>ResourceTypeEditorMappingLabelProvider</code> implementation of this |
| * <code>ITableLabelProvider</code> method creates and returns an new image. The |
| * image is remembered internally and will be deallocated by |
| * <code>dispose</code>. |
| */ |
| public Image getColumnImage(Object element, int row) { |
| return getImage(element); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ITableLabelProvider. |
| */ |
| public String getColumnText(Object element, int row) { |
| return getText(element); |
| } |
| |
| /** |
| * The <code>ResourceTypeEditorMappingLabelProvider</code> implementation of this |
| * <code>ILabelProvider</code> method creates and returns an new image. The image |
| * is remembered internally and will be deallocated by <code>dispose</code>. |
| */ |
| public Image getImage(Object element) { |
| if (element instanceof IFileEditorMapping) { |
| Image image = ((IFileEditorMapping) element).getImageDescriptor() |
| .createImage(); |
| imagesToDispose.add(image); |
| return image; |
| } |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ILabelProvider. |
| */ |
| public String getText(Object element) { |
| if (element instanceof IFileEditorMapping) { |
| return TextProcessor.process(((IFileEditorMapping) element) |
| .getLabel(), "*."); //$NON-NLS-1$ |
| } |
| |
| return null; |
| } |
| } |