EmfViewsUIPlugin.java

/*******************************************************************************
 * Copyright (c) 2013 INRIA.
 * 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:
 * Juan David Villa Calle - initial API and implementation
 *******************************************************************************/
package fr.inria.atlanmod.emfviews.ui;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;

public class EmfViewsUIPlugin extends AbstractUIPlugin {

	/** The plugin id. */
	public static final String PLUGIN_ID = "fr.inria.atlanmod.emfviews.ui"; //$NON-NLS-1$

	/** The shared instance. */
	private static EmfViewsUIPlugin plugin;

	/**
	 * Gets the image at the given plug-in relative path.
	 */
	private static Map<String, Image> path2image = new HashMap<String, Image>();

	/** Resource bundle. */
	private ResourceBundle resourceBundle;

	public EmfViewsUIPlugin() {
		super();
		plugin = this;

	}

	public static EmfViewsUIPlugin getDefault() {
		return plugin;
	}

	/**
	 * Returns the string from the plugin's resource bundle, or 'key' if not
	 * found.
	 * 
	 * @param key
	 *            the default value
	 * @return the string from the plugin's resource bundle, or 'key' if not
	 *         found
	 */
	public static String getResourceString(String key) {
		ResourceBundle bundle = EmfViewsUIPlugin.getDefault()
				.getResourceBundle();
		try {
			return (bundle != null) ? bundle.getString(key) : key;
		} catch (MissingResourceException e) {
			return key;
		}
	}

	/**
	 * Returns the plugin's resource bundle.
	 * 
	 * @return the plugin's resource bundle
	 */
	public ResourceBundle getResourceBundle() {
		return resourceBundle;
	}

	/**
	 * Looks for an image in the icons folder.
	 * 
	 * @param path
	 *            the image path
	 * @return the searched Image
	 */
	public static Image getImage(String path) {
		Image result = path2image.get(path);
		if (result == null && !path2image.containsKey(path)) {
			ImageDescriptor descriptor = getImageDescriptor(path);
			if (descriptor != null) {
				result = descriptor.createImage();
				path2image.put(path, result);
			}
		}
		if (result != null) {
			if (result.isDisposed()) {
				result = null;
			}
		}
		return result;
	}

	/**
	 * Returns the image descriptor with the given relative path.
	 * 
	 * @param name
	 *            the image name
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String name) {
		if (Platform.isRunning()) {
			String pluginDir = plugin.getBundle().getEntry("/").toString(); //$NON-NLS-1$
			String iconPath = "icons/"; //$NON-NLS-1$
			try {
				return ImageDescriptor.createFromURL(new URL(pluginDir
						+ iconPath + name));
			} catch (MalformedURLException mfe) {
				return ImageDescriptor.getMissingImageDescriptor();
			}
		}
		return null;
	}

}