ShowViewDialogLabelProvider.java

/****************************************************************************
 * Copyright (c) 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.internal.presence.collab.ui.view;

import java.util.HashMap;
import java.util.Iterator;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.views.IViewCategory;
import org.eclipse.ui.views.IViewDescriptor;

public class ShowViewDialogLabelProvider extends LabelProvider {
	private HashMap images = new HashMap();

	public Image getImage(Object element) {
		ImageDescriptor desc = null;
		if (element instanceof IViewCategory)
			desc = PlatformUI
					.getWorkbench()
					.getSharedImages()
					.getImageDescriptor(
							ISharedImages.IMG_OBJ_FOLDER);
		else if (element instanceof IViewDescriptor)
			desc = ((IViewDescriptor) element)
					.getImageDescriptor();

		if (desc == null)
			return null;

		Image image = (Image) images.get(desc);
		if (image == null) {
			image = desc.createImage();
			images.put(desc, image);
		}

		return image;
	}

	public String getText(Object element) {
		String label;
		if (element instanceof IViewCategory)
			label = ((IViewCategory) element)
					.getLabel();
		else if (element instanceof IViewDescriptor)
			label = ((IViewDescriptor) element)
					.getLabel();
		else
			label = super.getText(element);

		for (int i = label.indexOf('&'); i >= 0
				&& i < label.length() - 1; i = label
				.indexOf('&', i + 1))
			if (!Character.isWhitespace(label
					.charAt(i + 1)))
				return label.substring(0, i)
						+ label.substring(i + 1);

		return label;
	}

	public void dispose() {
		for (Iterator i = images.values().iterator(); i
				.hasNext();)
			((Image) i.next()).dispose();

		images = null;
		super.dispose();
	}
}