package org.eclipse.gmf.internal.doc.ui;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The main plugin class to be used in the desktop.
 */
public class Activator extends AbstractUIPlugin {

	// The shared instance.
	private static Activator plugin;

	/**
	 * The constructor.
	 */
	public Activator() {
		plugin = this;
	}

	/**
	 * This method is called upon plug-in activation
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
	}

	/**
	 * This method is called when the plug-in is stopped
	 */
	public void stop(BundleContext context) throws Exception {
		super.stop(context);
		plugin = null;
	}

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

	/**
	 * Returns an image descriptor for the image file at the given plug-in
	 * relative path.
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		return AbstractUIPlugin.imageDescriptorFromPlugin("org.eclipse.gmf.doc.ui", path);
	}

	public static Shell getActiveWorkbenchShell() {
		IWorkbenchWindow window = getActiveWorkbenchWindow();
		if (window != null)
			return window.getShell();
		else
			return null;

	}

	public static IWorkbenchWindow getActiveWorkbenchWindow() {
		return getDefault().getWorkbench().getActiveWorkbenchWindow();
	}
	
	public static void log(Exception ex) {
		if (ex instanceof CoreException) {
			log(((CoreException) ex).getStatus());
		} else {
			log(new Status(IStatus.ERROR, getPluginID(), 0, ex.getMessage(), ex));
		}
	}
	
	public static void log(IStatus s) {
		getDefault().getLog().log(s);
	}
	
	public static String getPluginID() {
		return getDefault().getBundle().getSymbolicName();
	}

}