/****************************************************************************
 * Copyright (c) 2008 Atos Origin.
 * 
 * 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:
 *		Thibault Landre (Atos Origin) - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.preferences;

import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.ImageDescriptor;
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;

/**
 * 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.papyrus.infra.gmfdiag.preferences"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	/** Logging helper */
	public static LogHelper log;

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

	/**
	 * Storage for preferences.
	 */
	protected IPreferenceStore papyrusPreferenceStore;

	/*
	 * (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;
		// register the login helper
		log = new LogHelper(plugin);
	}

	@Override
	public IPreferenceStore getPreferenceStore() {
		// Create the preference store lazily.
		if(papyrusPreferenceStore == null) {
			papyrusPreferenceStore = new PapyrusPreferenceStore(new InstanceScope(), getBundle().getSymbolicName());

		}
		return papyrusPreferenceStore;
	}

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

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

	public static Image getPluginIconImage(String pluginId, String iconPath) {
		String key = pluginId + iconPath;
		ImageRegistry registry = getDefault().getImageRegistry();
		Image image = registry.get(key);

		if(image == null) {

			ImageDescriptor desc = AbstractUIPlugin.imageDescriptorFromPlugin(pluginId, iconPath);

			registry.put(key, desc);
			image = registry.get(key);

		}


		return image;
	}
}