/**
 * Copyright (c) 2006, 2007 Borland Software Corporation
 * 
 * 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:
 *    bblajer - initial API and implementation
 */
package org.eclipse.gmf.internal.runtime.lite;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.gmf.runtime.lite.shortcuts.ShortcutProvidersRegistry;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

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

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.gmf.runtime.lite";

	// The shared instance
	private static Activator plugin;
	
	/**
	 * The constructor
	 */
	public Activator() {
		plugin = this;
	}

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

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

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

	public void logError(String error) {
		logError(error, null);
	}

	@Override
	protected void initializeImageRegistry(ImageRegistry reg) {
		PluginImages.initialize();
		super.initializeImageRegistry(reg);
	}
	/**
	 * @param throwable actual error or null could be passed
	 */
	public void logError(String error, Throwable throwable) {
		log(error, throwable, IStatus.ERROR);
	}

	private void debug(String message, Throwable throwable) {
		if (!isDebugging()) {
			return;
		}
		if (message != null) {
			System.err.println(message);
		}
		if (throwable != null) {
			throwable.printStackTrace();
		}
	}

	public void logWarning(String error) {
		logWarning(error, null);
	}

	public void logWarning(String error, Throwable throwable) {
		log(error, throwable, IStatus.WARNING);
	}

	private void log(String error, Throwable throwable, int severity) {
		if (error == null && throwable != null) {
			error = throwable.getMessage();
		}
		getLog().log(new Status(severity, getBundle().getSymbolicName(), IStatus.OK, error, throwable));
		debug(error, throwable);
	}

	public static ImageDescriptor getImageDescriptor(String imageFilePath) {
		return imageDescriptorFromPlugin(getDefault().getBundle().getSymbolicName(), imageFilePath);
	}
}