gitlight/plugins/org.eclipse.papyrus.gitlight.git.ui/src/org/eclipse/papyrus/gitlight/git/ui/Activator.java

/*****************************************************************************
 * Copyright (c) 2019 CEA LIST, and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *   Nicolas FAUVERGUE (CEA LIST) nicolas.fauvergue@cea.fr - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.gitlight.git.ui;

import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.papyrus.infra.core.log.LogHelper;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

public class Activator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.papyrus.gitlight.git.ui"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	/** Logging helper. */
	private static LogHelper logHelper;

	/**
	 * The constructor
	 */
	public Activator() {
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	@Override
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
		logHelper = new LogHelper(plugin);
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	@Override
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
		logHelper = null;
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static Activator getDefault() {
		return plugin;
	}

	/**
	 * Returns the log helper
	 * 
	 * @return the log helper
	 */
	public static LogHelper getLogHelper() {
		return logHelper;
	}

	/**
	 * Returns the image from the given image descriptor
	 *
	 * @param pluginId
	 *            The plugin in which the image is located
	 * @param path
	 *            The path to the image from the plugin
	 * @return
	 * 		The Image at the given location, or null if it couldn't be found
	 */
	public Image getImage(final String pluginId, final String path) {
		final ImageRegistry registry = getImageRegistry();
		String key = pluginId + "/" + path; //$NON-NLS-1$
		Image image = registry.get(key);
		if (image == null) {
			registry.put(key, AbstractUIPlugin.imageDescriptorFromPlugin(pluginId, path));
			image = registry.get(key);
		}
		return image;
	}

}