plugins/org.eclipse.bpel.ui/src/org/eclipse/bpel/ui/BPELUIPlugin.java - bpel/org.eclipse.bpel - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005 IBM Corporation and others.
  * 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.bpel.ui;

 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Iterator;

 import org.eclipse.bpel.common.ui.ColorUtils;
 import org.eclipse.core.resources.IResourceChangeEvent;
 import org.eclipse.core.resources.ISaveContext;
 import org.eclipse.core.resources.ISaveParticipant;
 import org.eclipse.core.resources.ISavedState;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.resource.ColorRegistry;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.resource.ImageRegistry;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.ui.plugin.AbstractUIPlugin;
 import org.osgi.framework.BundleContext;


 public class BPELUIPlugin extends AbstractUIPlugin {
 	public static final String PLUGIN_ID = "org.eclipse.bpel.ui"; //$NON-NLS-1$

 	static BPELUIPlugin plugin;

 	private ColorRegistry colorRegistry;
 	protected boolean imagesAndColorsInitialized;

 	// takes care of changes to the BPEL file
 	private BPELResourceChangeListener resourceChangeListener;
 	private ISaveParticipant saveParticipant;

 	public BPELUIPlugin() {
 		super();
 		plugin = this;
 	}

 	/**
 	 * Creates an image descriptor and places it in the image registry.
 	 */
 	private void createImageDescriptor(String id, URL baseURL) {
 		URL url = null;
 		try {
 			url = new URL(baseURL, IBPELUIConstants.ICON_PATH + id);
 		} catch (MalformedURLException e) {
 			BPELUIPlugin.log(e);
 		}
 		ImageDescriptor desc = ImageDescriptor.createFromURL(url);
 		getImageRegistry().put(id, desc);
 	}

 	/**
 	 * Returns the image descriptor for the given image ID.
 	 * Returns null if there is no such image.
 	 */
 	public ImageDescriptor getImageDescriptor(String id) {
 		return getImageRegistry().getDescriptor(id);
 	}
 	public Image getImage(String id) {
 		return getImageRegistry().get(id);
 	}

 	public static BPELUIPlugin getPlugin() {
 		return plugin;
 	}

 	private void initializeColors() {
 		colorRegistry = new ColorRegistry();

 		RGB color_240_240_240 = ColorUtils.getRelativeRGB(240, 240, 240);
 		RGB color_255_255_255 = ColorUtils.getRelativeRGB(255, 255, 255);
 		colorRegistry.put(IBPELUIConstants.COLOR_FLOW_BORDER, ColorUtils.getRelativeRGB(112, 152, 224));

 		colorRegistry.put(IBPELUIConstants.COLOR_GRADIENT_FROM, color_255_255_255);
 		colorRegistry.put(IBPELUIConstants.COLOR_GRADIENT_TO, color_240_240_240);

 		if (ColorUtils.isInvertedColorScheme()) {
 			colorRegistry.put(IBPELUIConstants.COLOR_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
 			colorRegistry.put(IBPELUIConstants.COLOR_COMPOSITE_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
 			colorRegistry.put(IBPELUIConstants.COLOR_SCOPE_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
 			colorRegistry.put(IBPELUIConstants.COLOR_IMPLICIT_LINK, ColorUtils.getRelativeRGB(25, 25, 25));
 		} else {
 			colorRegistry.put(IBPELUIConstants.COLOR_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(176, 176, 176));
 			colorRegistry.put(IBPELUIConstants.COLOR_COMPOSITE_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(205, 205, 205));
 			colorRegistry.put(IBPELUIConstants.COLOR_SCOPE_BORDER, ColorUtils.getRelativeRGB(205, 205, 205));
 			colorRegistry.put(IBPELUIConstants.COLOR_IMPLICIT_LINK, ColorUtils.getRelativeRGB(200, 200, 200));
 		}
 		colorRegistry.put(IBPELUIConstants.COLOR_HILIGHT_NODE, ColorUtils.getRelativeRGB(255, 255, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_BACKGROUND, ColorUtils.getRelativeRGB(255, 255, 255));
 		colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_SEPARATOR, ColorUtils.getRelativeRGB(230, 230, 230));
 		colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_REFERENCE, ColorUtils.getRelativeRGB(99, 151, 245));
 		colorRegistry.put(IBPELUIConstants.COLOR_LINK_ONE, ColorUtils.getRelativeRGB(238, 197, 253));
 		colorRegistry.put(IBPELUIConstants.COLOR_LINK_TWO, ColorUtils.getRelativeRGB(73, 0, 107));
 		colorRegistry.put(IBPELUIConstants.COLOR_LINK_THREE, ColorUtils.getRelativeRGB(222, 144, 254));

 		colorRegistry.put(IBPELUIConstants.COLOR_WHITE, ColorUtils.getRelativeRGB(255, 255, 255));
 		colorRegistry.put(IBPELUIConstants.COLOR_BLACK, ColorUtils.getRelativeRGB(0,0,0));
 		colorRegistry.put(IBPELUIConstants.COLOR_RED, ColorUtils.getRelativeRGB(255,0,0));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_RED, ColorUtils.getRelativeRGB(0x80, 0, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_GREEN, ColorUtils.getRelativeRGB( 0, 255, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_GREEN, ColorUtils.getRelativeRGB(0, 0x80, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_YELLOW, ColorUtils.getRelativeRGB(255, 255, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_YELLOW, ColorUtils.getRelativeRGB(0x80, 0x80, 0));
 		colorRegistry.put(IBPELUIConstants.COLOR_BLUE, ColorUtils.getRelativeRGB( 0, 0 ,255));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_BLUE, ColorUtils.getRelativeRGB(0, 0, 0x80));
 		colorRegistry.put(IBPELUIConstants.COLOR_MAGENTA, ColorUtils.getRelativeRGB( 255, 0, 255));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_MAGENTA, ColorUtils.getRelativeRGB( 0x80, 0, 0x80));
 		colorRegistry.put(IBPELUIConstants.COLOR_CYAN, ColorUtils.getRelativeRGB( 0, 255, 255));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_CYAN, ColorUtils.getRelativeRGB( 0, 0x80, 0x80));
 		colorRegistry.put(IBPELUIConstants.COLOR_GRAY, ColorUtils.getRelativeRGB( 0xC0, 0xC0, 0xC0));
 		colorRegistry.put(IBPELUIConstants.COLOR_DARK_GRAY, ColorUtils.getRelativeRGB(0x80, 0x80, 0x80));
 	}

 	/**
 	 * TODO: registry should be moved to editors and removed from plug-in
 	 */
 	public ColorRegistry getColorRegistry() {
 		if (colorRegistry == null) {
 			initialize();
 		}
 		return colorRegistry;
 	}

 	public ImageRegistry getImageRegistry() {
 		ImageRegistry result = super.getImageRegistry();
 		initialize();
 		return result;
 	}

 	/**
 	 * Initializes the table of images used in this plugin.
 	 */
 	private void initializeImages() {
 		URL baseURL = getBundle().getEntry("/"); //$NON-NLS-1$

 		createImageDescriptor(IBPELUIConstants.ICON_ASSIGN_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ASSIGN_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EMPTY_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EMPTY_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_FLOW_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_FLOW_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_INVOKE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_INVOKE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PICK_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PICK_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_RECEIVE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_RECEIVE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_REPLY_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_REPLY_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SCOPE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SCOPE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SEQUENCE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SEQUENCE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SWITCH_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SWITCH_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EXIT_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EXIT_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_THROW_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_THROW_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_RETHROW_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_RETHROW_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_COMPENSATE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_COMPENSATE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_WAIT_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_WAIT_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_WHILE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_WHILE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_REPEAT_UNTIL_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_REPEAT_UNTIL_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_VALIDATE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_VALIDATE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNER_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNER_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNER_IN_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNER_OUT_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_VARIABLE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_VARIABLE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CORRELATIONSET_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CORRELATIONSET_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PROCESS_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PROCESS_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_STARTNODE_16_GIF, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ENDNODE_16_GIF, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_CASE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CASE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_OTHERWISE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_OTHERWISE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ONMESSAGE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ONMESSAGE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ONALARM_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ONALARM_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_FAULTHANDLER_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_FAULTHANDLER_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_COMPENSATIONHANDLER_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_COMPENSATIONHANDLER_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_TERMINATIONHANDLER_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_TERMINATIONHANDLER_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EVENTHANDLER_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EVENTHANDLER_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CATCH_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CATCH_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CATCHALL_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_CATCHALL_32, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_FAULT_INDICATOR, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_COMPENSATION_INDICATOR, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_EVENT_INDICATOR, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_TERMINATION_INDICATOR, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_ACTION_INCOMING, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ACTION_INCOMING_GIF, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ACTION_OUTGOING, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ACTION_OUTGOING_GIF, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_FIGURE_EXPANDED, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_FIGURE_COLLAPSED, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_OUTLINE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_OVERVIEW_16, baseURL);

 		// Wizard banner
 		createImageDescriptor(IBPELUIConstants.ICON_WIZARD_BANNER, baseURL);

 		// Cursors
 		createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_MASK, baseURL);
 		createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_IN, baseURL);
 		createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_OUT, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_LINK_BOTTOMLEFT, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_BOTTOMRIGHT, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_TOPLEFT, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_TOPRIGHT, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_ARROWDOWN, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_LINK_CONDITIONAL, baseURL);

 		createImageDescriptor(IBPELUIConstants.ICON_MESSAGE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_MESSAGE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_OPERATION_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PART_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PART_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PORTTYPE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PORTTYPE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ROLE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_ROLE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNERLINKTYPE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PARTNERLINKTYPE_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PROPERTY_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_PROPERTY_32, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SERVICE_16, baseURL);
 		createImageDescriptor(IBPELUIConstants.ICON_SERVICE_32, baseURL);
 	}

 	/**
 	 * @see org.eclipse.core.runtime.Plugin#start(BundleContext)
 	 */
 	public void start(BundleContext context) throws Exception {
 		super.start(context);
 		initializePreferences();
 		initializeResourceChangeListener();
 	}

 	protected void initializePreferences() {
 		IPreferenceStore store = getPreferenceStore();
 		store.setDefault(IBPELUIConstants.PREF_SHOW_FREEFORM_FLOW, true);
 		store.setDefault(IBPELUIConstants.PREF_WARN_LINKS, true);
 		store.setDefault(IBPELUIConstants.PREF_AUTO_FLOW_LAYOUT, false);
 		store.setDefault(IBPELUIConstants.PREF_USE_ANIMATION, true);
 		store.setDefault(IBPELUIConstants.PREF_CREATE_SPEC_COMPLIANT_PROCESS, false);
 	}

 	/**
 	 * Installs the IResourceChangeListener for the BPEL Plugin. Also
 	 * checks if there were any changes to BPEL files while the plug-in
 	 * was not active.
 	 */
 	private void initializeResourceChangeListener() throws CoreException {
 		resourceChangeListener = new BPELResourceChangeListener();
 		// Add the save participant in a separate thread
 		// to make sure that it doesn't block the UI thread and potentially cause
 		// deadlocks with the code that caused our plugin to be started.
 		Thread initSaveParticipantThread = new Thread(new Runnable() {
 			public void run() {
 				try {
 					IWorkspace workspace = ResourcesPlugin.getWorkspace();
 					workspace.addResourceChangeListener(resourceChangeListener, IResourceChangeEvent.POST_BUILD);
 					ISavedState savedState = workspace.addSaveParticipant(BPELUIPlugin.this, getSaveParticipant());
 					if (savedState != null) {
 						savedState.processResourceChangeEvents(resourceChangeListener);
 					}
 				} catch (CoreException e) {
 					throw new RuntimeException(e);
 				}
 			}
 		});
 		initSaveParticipantThread.setName("BPELUIPlugin init"); //$NON-NLS-1$
 		initSaveParticipantThread.start();
 	}

 	public boolean activateZoomSupport() {
 		return false;
 	}

 	protected void initialize() {
 		if (!imagesAndColorsInitialized) {
 			imagesAndColorsInitialized = true;
 			initializeImages();
 			initializeColors();
 		}
 	}

 	/**
 	 * @see org.eclipse.core.runtime.Plugin#stop(BundleContext)
 	 */
 	public void stop(BundleContext context) throws Exception {
 		ResourcesPlugin.getWorkspace().removeResourceChangeListener(resourceChangeListener);
 		disposeColors();
 		super.stop(context);
 	}

 	private void disposeColors() {
 		if (colorRegistry != null) {
 			Iterator it = colorRegistry.getKeySet().iterator();
 			while (it.hasNext()) {
 				Color c = colorRegistry.get((String)it.next());
 				c.dispose();
 			}
 			colorRegistry = null;
 		}
 	}

 	/**
 	 * We are only interested in the resource delta while the plugin was
 	 * not active and don't really care about the plug-in save lifecycle.
 	 */
 	private ISaveParticipant getSaveParticipant() {
 		if (saveParticipant == null) {
 			saveParticipant = new ISaveParticipant() {
 				public void doneSaving(ISaveContext context) {
 				}
 				public void prepareToSave(ISaveContext context) throws CoreException {
 				}
 				public void rollback(ISaveContext context) {
 				}
 				public void saving(ISaveContext context) throws CoreException {
 					context.needDelta();
 				}
 			};
 		}
 		return saveParticipant;
 	}

 	/**
 	 * Returns the resource change listener.
 	 */
 	public BPELResourceChangeListener getResourceChangeListener() {
 		return resourceChangeListener;
 	}

 	/**
 	 * Utility methods for logging exceptions.
 	 */
 	public static void log(Exception e, int severity) {
 		IStatus status = null;
 		if (e instanceof CoreException) {
 			status = ((CoreException)e).getStatus();
 		} else {
 			String m = e.getMessage();
 			status = new Status(severity, PLUGIN_ID, 0, m==null? "<no message>" : m, e); //$NON-NLS-1$
 		}
 		System.out.println(e.getClass().getName()+": "+status); //$NON-NLS-1$
 		BPELUIPlugin.getPlugin().getLog().log(status);
 	}

 	public static void log(Exception e) { log(e, IStatus.ERROR); }
 }
	/*******************************************************************************
	* Copyright (c) 2005 IBM Corporation and others.
	* 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.bpel.ui;

	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.Iterator;

	import org.eclipse.bpel.common.ui.ColorUtils;
	import org.eclipse.core.resources.IResourceChangeEvent;
	import org.eclipse.core.resources.ISaveContext;
	import org.eclipse.core.resources.ISaveParticipant;
	import org.eclipse.core.resources.ISavedState;
	import org.eclipse.core.resources.IWorkspace;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.resource.ColorRegistry;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.resource.ImageRegistry;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.RGB;
	import org.eclipse.ui.plugin.AbstractUIPlugin;
	import org.osgi.framework.BundleContext;


	public class BPELUIPlugin extends AbstractUIPlugin {
	public static final String PLUGIN_ID = "org.eclipse.bpel.ui"; //$NON-NLS-1$

	static BPELUIPlugin plugin;

	private ColorRegistry colorRegistry;
	protected boolean imagesAndColorsInitialized;

	// takes care of changes to the BPEL file
	private BPELResourceChangeListener resourceChangeListener;
	private ISaveParticipant saveParticipant;

	public BPELUIPlugin() {
	super();
	plugin = this;
	}

	/**
	* Creates an image descriptor and places it in the image registry.
	*/
	private void createImageDescriptor(String id, URL baseURL) {
	URL url = null;
	try {
	url = new URL(baseURL, IBPELUIConstants.ICON_PATH + id);
	} catch (MalformedURLException e) {
	BPELUIPlugin.log(e);
	}
	ImageDescriptor desc = ImageDescriptor.createFromURL(url);
	getImageRegistry().put(id, desc);
	}

	/**
	* Returns the image descriptor for the given image ID.
	* Returns null if there is no such image.
	*/
	public ImageDescriptor getImageDescriptor(String id) {
	return getImageRegistry().getDescriptor(id);
	}
	public Image getImage(String id) {
	return getImageRegistry().get(id);
	}

	public static BPELUIPlugin getPlugin() {
	return plugin;
	}

	private void initializeColors() {
	colorRegistry = new ColorRegistry();

	RGB color_240_240_240 = ColorUtils.getRelativeRGB(240, 240, 240);
	RGB color_255_255_255 = ColorUtils.getRelativeRGB(255, 255, 255);
	colorRegistry.put(IBPELUIConstants.COLOR_FLOW_BORDER, ColorUtils.getRelativeRGB(112, 152, 224));

	colorRegistry.put(IBPELUIConstants.COLOR_GRADIENT_FROM, color_255_255_255);
	colorRegistry.put(IBPELUIConstants.COLOR_GRADIENT_TO, color_240_240_240);

	if (ColorUtils.isInvertedColorScheme()) {
	colorRegistry.put(IBPELUIConstants.COLOR_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
	colorRegistry.put(IBPELUIConstants.COLOR_COMPOSITE_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
	colorRegistry.put(IBPELUIConstants.COLOR_SCOPE_BORDER, ColorUtils.getRelativeRGB(25, 25, 25));
	colorRegistry.put(IBPELUIConstants.COLOR_IMPLICIT_LINK, ColorUtils.getRelativeRGB(25, 25, 25));
	} else {
	colorRegistry.put(IBPELUIConstants.COLOR_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(176, 176, 176));
	colorRegistry.put(IBPELUIConstants.COLOR_COMPOSITE_ACTIVITY_BORDER, ColorUtils.getRelativeRGB(205, 205, 205));
	colorRegistry.put(IBPELUIConstants.COLOR_SCOPE_BORDER, ColorUtils.getRelativeRGB(205, 205, 205));
	colorRegistry.put(IBPELUIConstants.COLOR_IMPLICIT_LINK, ColorUtils.getRelativeRGB(200, 200, 200));
	}
	colorRegistry.put(IBPELUIConstants.COLOR_HILIGHT_NODE, ColorUtils.getRelativeRGB(255, 255, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_BACKGROUND, ColorUtils.getRelativeRGB(255, 255, 255));
	colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_SEPARATOR, ColorUtils.getRelativeRGB(230, 230, 230));
	colorRegistry.put(IBPELUIConstants.COLOR_VARIABLE_REFERENCE, ColorUtils.getRelativeRGB(99, 151, 245));
	colorRegistry.put(IBPELUIConstants.COLOR_LINK_ONE, ColorUtils.getRelativeRGB(238, 197, 253));
	colorRegistry.put(IBPELUIConstants.COLOR_LINK_TWO, ColorUtils.getRelativeRGB(73, 0, 107));
	colorRegistry.put(IBPELUIConstants.COLOR_LINK_THREE, ColorUtils.getRelativeRGB(222, 144, 254));

	colorRegistry.put(IBPELUIConstants.COLOR_WHITE, ColorUtils.getRelativeRGB(255, 255, 255));
	colorRegistry.put(IBPELUIConstants.COLOR_BLACK, ColorUtils.getRelativeRGB(0,0,0));
	colorRegistry.put(IBPELUIConstants.COLOR_RED, ColorUtils.getRelativeRGB(255,0,0));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_RED, ColorUtils.getRelativeRGB(0x80, 0, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_GREEN, ColorUtils.getRelativeRGB( 0, 255, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_GREEN, ColorUtils.getRelativeRGB(0, 0x80, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_YELLOW, ColorUtils.getRelativeRGB(255, 255, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_YELLOW, ColorUtils.getRelativeRGB(0x80, 0x80, 0));
	colorRegistry.put(IBPELUIConstants.COLOR_BLUE, ColorUtils.getRelativeRGB( 0, 0 ,255));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_BLUE, ColorUtils.getRelativeRGB(0, 0, 0x80));
	colorRegistry.put(IBPELUIConstants.COLOR_MAGENTA, ColorUtils.getRelativeRGB( 255, 0, 255));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_MAGENTA, ColorUtils.getRelativeRGB( 0x80, 0, 0x80));
	colorRegistry.put(IBPELUIConstants.COLOR_CYAN, ColorUtils.getRelativeRGB( 0, 255, 255));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_CYAN, ColorUtils.getRelativeRGB( 0, 0x80, 0x80));
	colorRegistry.put(IBPELUIConstants.COLOR_GRAY, ColorUtils.getRelativeRGB( 0xC0, 0xC0, 0xC0));
	colorRegistry.put(IBPELUIConstants.COLOR_DARK_GRAY, ColorUtils.getRelativeRGB(0x80, 0x80, 0x80));
	}

	/**
	* TODO: registry should be moved to editors and removed from plug-in
	*/
	public ColorRegistry getColorRegistry() {
	if (colorRegistry == null) {
	initialize();
	}
	return colorRegistry;
	}

	public ImageRegistry getImageRegistry() {
	ImageRegistry result = super.getImageRegistry();
	initialize();
	return result;
	}

	/**
	* Initializes the table of images used in this plugin.
	*/
	private void initializeImages() {
	URL baseURL = getBundle().getEntry("/"); //$NON-NLS-1$

	createImageDescriptor(IBPELUIConstants.ICON_ASSIGN_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ASSIGN_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EMPTY_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EMPTY_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_FLOW_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_FLOW_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_INVOKE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_INVOKE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PICK_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PICK_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_RECEIVE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_RECEIVE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_REPLY_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_REPLY_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SCOPE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SCOPE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SEQUENCE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SEQUENCE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SWITCH_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SWITCH_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EXIT_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EXIT_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_THROW_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_THROW_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_RETHROW_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_RETHROW_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_COMPENSATE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_COMPENSATE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_WAIT_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_WAIT_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_WHILE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_WHILE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_REPEAT_UNTIL_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_REPEAT_UNTIL_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_VALIDATE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_VALIDATE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNER_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNER_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNER_IN_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNER_OUT_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_VARIABLE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_VARIABLE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CORRELATIONSET_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CORRELATIONSET_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PROCESS_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PROCESS_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_STARTNODE_16_GIF, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ENDNODE_16_GIF, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_CASE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CASE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_OTHERWISE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_OTHERWISE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ONMESSAGE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ONMESSAGE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ONALARM_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ONALARM_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_FAULTHANDLER_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_FAULTHANDLER_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_COMPENSATIONHANDLER_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_COMPENSATIONHANDLER_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_TERMINATIONHANDLER_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_TERMINATIONHANDLER_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EVENTHANDLER_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EVENTHANDLER_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CATCH_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CATCH_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CATCHALL_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_CATCHALL_32, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_FAULT_INDICATOR, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_COMPENSATION_INDICATOR, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_EVENT_INDICATOR, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_TERMINATION_INDICATOR, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_ACTION_INCOMING, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ACTION_INCOMING_GIF, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ACTION_OUTGOING, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ACTION_OUTGOING_GIF, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_FIGURE_EXPANDED, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_FIGURE_COLLAPSED, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_OUTLINE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_OVERVIEW_16, baseURL);

	// Wizard banner
	createImageDescriptor(IBPELUIConstants.ICON_WIZARD_BANNER, baseURL);

	// Cursors
	createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_MASK, baseURL);
	createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_IN, baseURL);
	createImageDescriptor(IBPELUIConstants.CURSOR_ZOOM_OUT, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_LINK_BOTTOMLEFT, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_BOTTOMRIGHT, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_TOPLEFT, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_TOPRIGHT, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_ARROWDOWN, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_LINK_CONDITIONAL, baseURL);

	createImageDescriptor(IBPELUIConstants.ICON_MESSAGE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_MESSAGE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_OPERATION_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PART_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PART_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PORTTYPE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PORTTYPE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ROLE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_ROLE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNERLINKTYPE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PARTNERLINKTYPE_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PROPERTY_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_PROPERTY_32, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SERVICE_16, baseURL);
	createImageDescriptor(IBPELUIConstants.ICON_SERVICE_32, baseURL);
	}

	/**
	* @see org.eclipse.core.runtime.Plugin#start(BundleContext)
	*/
	public void start(BundleContext context) throws Exception {
	super.start(context);
	initializePreferences();
	initializeResourceChangeListener();
	}

	protected void initializePreferences() {
	IPreferenceStore store = getPreferenceStore();
	store.setDefault(IBPELUIConstants.PREF_SHOW_FREEFORM_FLOW, true);
	store.setDefault(IBPELUIConstants.PREF_WARN_LINKS, true);
	store.setDefault(IBPELUIConstants.PREF_AUTO_FLOW_LAYOUT, false);
	store.setDefault(IBPELUIConstants.PREF_USE_ANIMATION, true);
	store.setDefault(IBPELUIConstants.PREF_CREATE_SPEC_COMPLIANT_PROCESS, false);
	}

	/**
	* Installs the IResourceChangeListener for the BPEL Plugin. Also
	* checks if there were any changes to BPEL files while the plug-in
	* was not active.
	*/
	private void initializeResourceChangeListener() throws CoreException {
	resourceChangeListener = new BPELResourceChangeListener();
	// Add the save participant in a separate thread
	// to make sure that it doesn't block the UI thread and potentially cause
	// deadlocks with the code that caused our plugin to be started.
	Thread initSaveParticipantThread = new Thread(new Runnable() {
	public void run() {
	try {
	IWorkspace workspace = ResourcesPlugin.getWorkspace();
	workspace.addResourceChangeListener(resourceChangeListener, IResourceChangeEvent.POST_BUILD);
	ISavedState savedState = workspace.addSaveParticipant(BPELUIPlugin.this, getSaveParticipant());
	if (savedState != null) {
	savedState.processResourceChangeEvents(resourceChangeListener);
	}
	} catch (CoreException e) {
	throw new RuntimeException(e);
	}
	}
	});
	initSaveParticipantThread.setName("BPELUIPlugin init"); //$NON-NLS-1$
	initSaveParticipantThread.start();
	}

	public boolean activateZoomSupport() {
	return false;
	}

	protected void initialize() {
	if (!imagesAndColorsInitialized) {
	imagesAndColorsInitialized = true;
	initializeImages();
	initializeColors();
	}
	}

	/**
	* @see org.eclipse.core.runtime.Plugin#stop(BundleContext)
	*/
	public void stop(BundleContext context) throws Exception {
	ResourcesPlugin.getWorkspace().removeResourceChangeListener(resourceChangeListener);
	disposeColors();
	super.stop(context);
	}

	private void disposeColors() {
	if (colorRegistry != null) {
	Iterator it = colorRegistry.getKeySet().iterator();
	while (it.hasNext()) {
	Color c = colorRegistry.get((String)it.next());
	c.dispose();
	}
	colorRegistry = null;
	}
	}

	/**
	* We are only interested in the resource delta while the plugin was
	* not active and don't really care about the plug-in save lifecycle.
	*/
	private ISaveParticipant getSaveParticipant() {
	if (saveParticipant == null) {
	saveParticipant = new ISaveParticipant() {
	public void doneSaving(ISaveContext context) {
	}
	public void prepareToSave(ISaveContext context) throws CoreException {
	}
	public void rollback(ISaveContext context) {
	}
	public void saving(ISaveContext context) throws CoreException {
	context.needDelta();
	}
	};
	}
	return saveParticipant;
	}

	/**
	* Returns the resource change listener.
	*/
	public BPELResourceChangeListener getResourceChangeListener() {
	return resourceChangeListener;
	}

	/**
	* Utility methods for logging exceptions.
	*/
	public static void log(Exception e, int severity) {
	IStatus status = null;
	if (e instanceof CoreException) {
	status = ((CoreException)e).getStatus();
	} else {
	String m = e.getMessage();
	status = new Status(severity, PLUGIN_ID, 0, m==null? "<no message>" : m, e); //$NON-NLS-1$
	}
	System.out.println(e.getClass().getName()+": "+status); //$NON-NLS-1$
	BPELUIPlugin.getPlugin().getLog().log(status);
	}

	public static void log(Exception e) { log(e, IStatus.ERROR); }
	}