| /**************************************************************************** |
| * Copyright (c) 2004, 2007 Composent, Inc. 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: |
| * Composent, Inc. - initial API and implementation |
| *****************************************************************************/ |
| package org.eclipse.ecf.presence.ui; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.model.IWorkbenchAdapter; |
| |
| /** |
| * Label provider for multiple roster viewer. This label provider implements an |
| * LabelProvider suitable for use by viewers that accepts LabelProvider as |
| * input. This class may be subclassed in order to customize the |
| * behavior/display of other label providers. |
| * |
| */ |
| public class MultiRosterLabelProvider extends LabelProvider { |
| |
| private Map imageTable = new HashMap(7); |
| |
| /** |
| * @param element |
| * @return IWorkbenchAdapter for the given element |
| */ |
| protected IWorkbenchAdapter getAdapter(Object element) { |
| IWorkbenchAdapter adapter = null; |
| if (element instanceof IAdaptable) |
| adapter = (IWorkbenchAdapter) ((IAdaptable) element) |
| .getAdapter(IWorkbenchAdapter.class); |
| if (element != null && adapter == null) |
| adapter = (IWorkbenchAdapter) Platform.getAdapterManager() |
| .loadAdapter(element, IWorkbenchAdapter.class.getName()); |
| return adapter; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object) |
| */ |
| public Image getImage(Object element) { |
| IWorkbenchAdapter adapter = getAdapter(element); |
| if (adapter == null) |
| return null; |
| ImageDescriptor descriptor = adapter.getImageDescriptor(element); |
| if (descriptor == null) |
| return null; |
| Image image = (Image) imageTable.get(descriptor); |
| if (image == null) { |
| image = descriptor.createImage(); |
| imageTable.put(descriptor, image); |
| } |
| return image; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object) |
| */ |
| public String getText(Object element) { |
| IWorkbenchAdapter adapter = getAdapter(element); |
| return adapter == null ? "" : adapter.getLabel(element); //$NON-NLS-1$ |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.BaseLabelProvider#dispose() |
| */ |
| public void dispose() { |
| if (imageTable != null) { |
| for (Iterator i = imageTable.values().iterator(); i.hasNext();) { |
| ((Image) i.next()).dispose(); |
| } |
| imageTable = null; |
| } |
| } |
| |
| } |