bundles/org.eclipse.ui.glance/src/org/eclipse/ui/glance/internal/GlancePlugin.java

/*******************************************************************************
 * Copyright (c) 2017 Exyte
 * 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:
 *     Yuri Strot - initial API and Implementation
 ******************************************************************************/
package org.eclipse.ui.glance.internal;

import java.net.URL;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class GlancePlugin extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.ui.glance";

	// IMAGES

	private static final String IMG_PREFIX = "icons/";

	public static final String IMG_WAIT = IMG_PREFIX + "wait.gif";
	public static final String IMG_NEXT = IMG_PREFIX + "next.gif";
	public static final String IMG_PREV = IMG_PREFIX + "prev.gif";
	public static final String IMG_SEARCH = IMG_PREFIX + "search.png";
	public static final String IMG_START_INDEXING = IMG_PREFIX + "update_1.gif";
	public static final String IMG_END_INDEXING = IMG_PREFIX + "update_2.gif";
	public static final String IMG_INDEXING_FINISHED = IMG_PREFIX
			+ "update_done.gif";
	public static final String[] IMG_INDEXING_LOOP = new String[] {
			IMG_START_INDEXING, IMG_END_INDEXING };

	// The shared instance
	private static GlancePlugin plugin;

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

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

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

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

	public static Image getImage(String path) {
		Image image = getDefault().getImageRegistry().get(path);
		if (image == null) {
			ImageDescriptor imageDescriptor = getImageDescriptor(path, false);
			image = imageDescriptor.createImage();
			getDefault().getImageRegistry().put(path, image);
		}
		return image;
	}

	public static ImageDescriptor getImageDescriptor(String path) {
		return getImageDescriptor(path, true);
	}

	private static ImageDescriptor getImageDescriptor(String path,
			boolean addToRegistry) {
		ImageDescriptor imageDescriptor = getDefault().getImageRegistry()
				.getDescriptor(path);
		if (imageDescriptor == null) {
			imageDescriptor = ImageDescriptor.createFromURL(makeImageURL(path));
			if (addToRegistry) {
				getDefault().getImageRegistry().put(path, imageDescriptor);
			}
		}
		return imageDescriptor;
	}

	public static void log(String message) {
		log(message, null);
	}

	public static void log(Throwable t) {
		log(t.getMessage(), t);
	}

	public static void log(String message, Throwable t) {
		log(createStatus(message, t));
	}

	public static void log(IStatus status) {
		getDefault().getLog().log(status);
	}

	public static IStatus createStatus(String message) {
		return createStatus(message, null);
	}

	public static IStatus createStatus(String message, Throwable t) {
		return new Status(Status.ERROR, PLUGIN_ID, message, t);
	}

	private static URL makeImageURL(String path) {
		return FileLocator.find(getDefault().getBundle(), new Path(path), null);
	}
}