bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/services/ActivePartSourceProvider.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2008 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.ui.internal.services;

 import java.util.HashMap;
 import java.util.Map;

 import org.eclipse.core.expressions.IEvaluationContext;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionProvider;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.AbstractSourceProvider;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IEditorSite;
 import org.eclipse.ui.IPartListener;
 import org.eclipse.ui.ISources;
 import org.eclipse.ui.IWindowListener;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.IWorkbenchPartSite;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.contexts.IContextService;
 import org.eclipse.ui.internal.util.Util;
 import org.eclipse.ui.part.IShowInSource;
 import org.eclipse.ui.part.ShowInContext;
 import org.eclipse.ui.services.IServiceLocator;

 /**
  * Provides notifications when the active part changes.
  *
  * @since 3.1
  */
 public class ActivePartSourceProvider extends AbstractSourceProvider {

 	/**
 	 * The names of the sources supported by this source provider.
 	 */
 	private static final String[] PROVIDED_SOURCE_NAMES = new String[] {
 			ISources.ACTIVE_EDITOR_ID_NAME, ISources.ACTIVE_EDITOR_NAME,
 			ISources.ACTIVE_PART_ID_NAME, ISources.ACTIVE_PART_NAME,
 			ISources.ACTIVE_SITE_NAME, ISources.SHOW_IN_SELECTION,
 			ISources.SHOW_IN_INPUT };

 	/**
 	 * The last active editor part seen as active by this provider. This value
 	 * may be <code>null</code> if there is no currently active editor.
 	 */
 	private IEditorPart lastActiveEditor = null;

 	/**
 	 * The last active editor id seen as active by this provider. This value may
 	 * be <code>null</code> if there is no currently active editor.
 	 */
 	private String lastActiveEditorId = null;

 	/**
 	 * The last active part seen as active by this provider. This value may be
 	 * <code>null</code> if there is no currently active part.
 	 */
 	private IWorkbenchPart lastActivePart = null;

 	/**
 	 * The last active part id seen as active by this provider. This value may
 	 * be <code>null</code> if there is no currently active part.
 	 */
 	private String lastActivePartId = null;

 	/**
 	 * The last active part site seen by this provider. This value may be
 	 * <code>null</code> if there is no currently active site.
 	 */
 	private IWorkbenchPartSite lastActivePartSite = null;

 	private Object lastShowInInput = null;
 	private ISelection lastShowInSelection = null;

 	private final IPartListener partListener = new IPartListener() {

 		public final void partActivated(final IWorkbenchPart part) {
 			checkActivePart();
 		}

 		public final void partBroughtToTop(final IWorkbenchPart part) {
 			checkActivePart();
 		}

 		public final void partClosed(final IWorkbenchPart part) {
 			checkActivePart();
 		}

 		public final void partDeactivated(final IWorkbenchPart part) {
 			checkActivePart();
 		}

 		public final void partOpened(final IWorkbenchPart part) {
 			checkActivePart();
 		}

 	};

 	private final IWindowListener windowListener = new IWindowListener() {

 		public final void windowActivated(final IWorkbenchWindow window) {
 			checkActivePart();
 		}

 		public final void windowClosed(final IWorkbenchWindow window) {
 			if (window != null) {
 				window.getPartService().removePartListener(partListener);
 			}
 			checkActivePart();
 		}

 		public final void windowDeactivated(final IWorkbenchWindow window) {
 			checkActivePart();
 		}

 		public final void windowOpened(final IWorkbenchWindow window) {
 			if (window != null) {
 				window.getPartService().addPartListener(partListener);
 			}
 		}

 	};

 	private Shell lastActiveShell = null;
 	public void handleCheck(Shell s) {
 		if (s != lastActiveShell) {
 			lastActiveShell = s;
 			checkActivePart();
 		}
 	}

 	/**
 	 * The workbench on which this source provider will act.
 	 */
 	private IWorkbench workbench;

 	public final void checkActivePart() {
 		final Map currentState = getCurrentState();
 		int sources = 0;

 		// Figure out what was changed.
 		final Object newActivePart = currentState
 				.get(ISources.ACTIVE_PART_NAME);
 		if (!Util.equals(newActivePart, lastActivePart)) {
 			sources |= ISources.ACTIVE_PART;
 			if (newActivePart != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastActivePart = (IWorkbenchPart) newActivePart;
 			} else {
 				lastActivePart = null;
 			}
 		}
 		final Object newActivePartId = currentState
 				.get(ISources.ACTIVE_PART_ID_NAME);
 		if (!Util.equals(newActivePartId, lastActivePartId)) {
 			sources |= ISources.ACTIVE_PART_ID;
 			if (newActivePartId != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastActivePartId = (String) newActivePartId;
 			} else {
 				lastActivePartId = null;
 			}
 		}
 		final Object newActivePartSite = currentState
 				.get(ISources.ACTIVE_SITE_NAME);
 		if (!Util.equals(newActivePartSite, lastActivePartSite)) {
 			sources |= ISources.ACTIVE_SITE;
 			if (newActivePartSite != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastActivePartSite = (IWorkbenchPartSite) newActivePartSite;
 			} else {
 				lastActivePartSite = null;
 			}
 		}
 		final Object newShowInInput = currentState.get(ISources.SHOW_IN_INPUT);
 		if (!Util.equals(newShowInInput, lastShowInInput)) {
 			sources |= ISources.ACTIVE_SITE;
 			lastShowInInput = newShowInInput;
 		}
 		final Object newShowInSelection = currentState
 				.get(ISources.SHOW_IN_SELECTION);
 		if (!Util.equals(newShowInSelection, lastShowInSelection)) {
 			sources |= ISources.ACTIVE_SITE;
 			if (newShowInSelection != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastShowInSelection = (ISelection) newShowInSelection;
 			} else {
 				lastShowInSelection = null;
 			}
 		}
 		final Object newActiveEditor = currentState
 				.get(ISources.ACTIVE_EDITOR_NAME);
 		if (!Util.equals(newActiveEditor, lastActiveEditor)) {
 			sources |= ISources.ACTIVE_EDITOR;
 			if (newActiveEditor != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastActiveEditor = (IEditorPart) newActiveEditor;
 			} else {
 				lastActiveEditor = null;
 			}
 		}
 		final Object newActiveEditorId = currentState
 				.get(ISources.ACTIVE_EDITOR_ID_NAME);
 		if (!Util.equals(newActiveEditorId, lastActiveEditorId)) {
 			sources |= ISources.ACTIVE_EDITOR_ID;
 			if (newActiveEditorId != IEvaluationContext.UNDEFINED_VARIABLE) {
 				lastActiveEditorId = (String) newActiveEditorId;
 			} else {
 				lastActiveEditorId = null;
 			}
 		}

 		// Fire the event, if something has changed.
 		if (sources != 0) {
 			if (DEBUG) {
 				if ((sources & ISources.ACTIVE_PART) != 0) {
 					logDebuggingInfo("Active part changed to " //$NON-NLS-1$
 							+ lastActivePart);
 				}
 				if ((sources & ISources.ACTIVE_PART_ID) != 0) {
 					logDebuggingInfo("Active part id changed to " //$NON-NLS-1$
 							+ lastActivePartId);
 				}
 				if ((sources & ISources.ACTIVE_SITE) != 0) {
 					logDebuggingInfo("Active site changed to " //$NON-NLS-1$
 							+ lastActivePartSite);
 				}
 				if ((sources & ISources.ACTIVE_EDITOR) != 0) {
 					logDebuggingInfo("Active editor changed to " //$NON-NLS-1$
 							+ lastActiveEditor);
 				}
 				if ((sources & ISources.ACTIVE_EDITOR_ID) != 0) {
 					logDebuggingInfo("Active editor id changed to " //$NON-NLS-1$
 							+ lastActiveEditorId);
 				}
 			}
 			fireSourceChanged(sources, currentState);
 		}
 	}

 	private IShowInSource getShowInSource(IWorkbenchPart sourcePart) {
 		return (IShowInSource) Util.getAdapter(sourcePart, IShowInSource.class);
 	}

 	private ShowInContext getContext(IWorkbenchPart sourcePart) {
 		IShowInSource source = getShowInSource(sourcePart);
 		if (source != null) {
 			ShowInContext context = source.getShowInContext();
 			if (context != null) {
 				return context;
 			}
 		} else if (sourcePart instanceof IEditorPart) {
 			Object input = ((IEditorPart) sourcePart).getEditorInput();
 			ISelectionProvider sp = sourcePart.getSite().getSelectionProvider();
 			ISelection sel = sp == null ? null : sp.getSelection();
 			return new ShowInContext(input, sel);
 		}
 		return null;
 	}

 	public final void dispose() {
 		workbench.removeWindowListener(windowListener);
 	}

 	public final Map getCurrentState() {
 		final Map currentState = new HashMap(7);
 		currentState.put(ISources.ACTIVE_SITE_NAME,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.ACTIVE_PART_NAME,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.ACTIVE_PART_ID_NAME,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.ACTIVE_EDITOR_NAME,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.ACTIVE_EDITOR_ID_NAME,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.SHOW_IN_INPUT,
 				IEvaluationContext.UNDEFINED_VARIABLE);
 		currentState.put(ISources.SHOW_IN_SELECTION,
 				IEvaluationContext.UNDEFINED_VARIABLE);

 		final IWorkbenchWindow activeWorkbenchWindow = getActiveWindow();
 		if (activeWorkbenchWindow != null) {
 			final IWorkbenchPage activeWorkbenchPage = activeWorkbenchWindow
 					.getActivePage();
 			if (activeWorkbenchPage != null) {
 				// Check the active workbench part.
 				final IWorkbenchPart newActivePart = activeWorkbenchPage
 						.getActivePart();
 				currentState.put(ISources.ACTIVE_PART_NAME, newActivePart);
 				if (newActivePart != null) {
 					final IWorkbenchPartSite activeWorkbenchPartSite = newActivePart
 							.getSite();
 					currentState.put(ISources.ACTIVE_SITE_NAME,
 							activeWorkbenchPartSite);
 					if (activeWorkbenchPartSite != null) {
 						final String newActivePartId = activeWorkbenchPartSite
 								.getId();
 						currentState.put(ISources.ACTIVE_PART_ID_NAME,
 								newActivePartId);
 					}
 					ShowInContext context = getContext(newActivePart);
 					if (context != null) {
 						Object input = context.getInput();
 						if (input != null) {
 							currentState.put(ISources.SHOW_IN_INPUT, input);
 						}
 						ISelection selection = context.getSelection();
 						if (selection != null) {
 							currentState.put(ISources.SHOW_IN_SELECTION,
 									selection);
 						}
 					}
 				}

 				// Check the active editor part.
 				final IEditorPart newActiveEditor = activeWorkbenchPage
 						.getActiveEditor();
 				currentState.put(ISources.ACTIVE_EDITOR_NAME, newActiveEditor);
 				if (newActiveEditor != null) {
 					final IEditorSite activeEditorSite = newActiveEditor
 							.getEditorSite();
 					if (activeEditorSite != null) {
 						final String newActiveEditorId = activeEditorSite
 								.getId();
 						currentState.put(ISources.ACTIVE_EDITOR_ID_NAME,
 								newActiveEditorId);
 					}
 				}
 			}
 		}

 		return currentState;
 	}

 	private IWorkbenchWindow getActiveWindow() {
 		final Shell newActiveShell = workbench.getDisplay().getActiveShell();
 		final IContextService contextService = (IContextService) workbench
 				.getService(IContextService.class);
 		if (contextService != null) {
 			final int shellType = contextService.getShellType(newActiveShell);
 			if (shellType != IContextService.TYPE_DIALOG) {
 				return workbench.getActiveWorkbenchWindow();
 			}
 		}
 		return null;
 	}

 	public final String[] getProvidedSourceNames() {
 		return PROVIDED_SOURCE_NAMES;
 	}

 	public void initialize(IServiceLocator locator) {
 		IWorkbenchLocationService wls = (IWorkbenchLocationService) locator
 				.getService(IWorkbenchLocationService.class);
 		workbench = wls.getWorkbench();
 		workbench.addWindowListener(windowListener);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2008 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.ui.internal.services;

	import java.util.HashMap;
	import java.util.Map;

	import org.eclipse.core.expressions.IEvaluationContext;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionProvider;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.AbstractSourceProvider;
	import org.eclipse.ui.IEditorPart;
	import org.eclipse.ui.IEditorSite;
	import org.eclipse.ui.IPartListener;
	import org.eclipse.ui.ISources;
	import org.eclipse.ui.IWindowListener;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.IWorkbenchPartSite;
	import org.eclipse.ui.IWorkbenchWindow;
	import org.eclipse.ui.contexts.IContextService;
	import org.eclipse.ui.internal.util.Util;
	import org.eclipse.ui.part.IShowInSource;
	import org.eclipse.ui.part.ShowInContext;
	import org.eclipse.ui.services.IServiceLocator;

	/**
	* Provides notifications when the active part changes.
	*
	* @since 3.1
	*/
	public class ActivePartSourceProvider extends AbstractSourceProvider {

	/**
	* The names of the sources supported by this source provider.
	*/
	private static final String[] PROVIDED_SOURCE_NAMES = new String[] {
	ISources.ACTIVE_EDITOR_ID_NAME, ISources.ACTIVE_EDITOR_NAME,
	ISources.ACTIVE_PART_ID_NAME, ISources.ACTIVE_PART_NAME,
	ISources.ACTIVE_SITE_NAME, ISources.SHOW_IN_SELECTION,
	ISources.SHOW_IN_INPUT };

	/**
	* The last active editor part seen as active by this provider. This value
	* may be <code>null</code> if there is no currently active editor.
	*/
	private IEditorPart lastActiveEditor = null;

	/**
	* The last active editor id seen as active by this provider. This value may
	* be <code>null</code> if there is no currently active editor.
	*/
	private String lastActiveEditorId = null;

	/**
	* The last active part seen as active by this provider. This value may be
	* <code>null</code> if there is no currently active part.
	*/
	private IWorkbenchPart lastActivePart = null;

	/**
	* The last active part id seen as active by this provider. This value may
	* be <code>null</code> if there is no currently active part.
	*/
	private String lastActivePartId = null;

	/**
	* The last active part site seen by this provider. This value may be
	* <code>null</code> if there is no currently active site.
	*/
	private IWorkbenchPartSite lastActivePartSite = null;

	private Object lastShowInInput = null;
	private ISelection lastShowInSelection = null;

	private final IPartListener partListener = new IPartListener() {

	public final void partActivated(final IWorkbenchPart part) {
	checkActivePart();
	}

	public final void partBroughtToTop(final IWorkbenchPart part) {
	checkActivePart();
	}

	public final void partClosed(final IWorkbenchPart part) {
	checkActivePart();
	}

	public final void partDeactivated(final IWorkbenchPart part) {
	checkActivePart();
	}

	public final void partOpened(final IWorkbenchPart part) {
	checkActivePart();
	}

	};

	private final IWindowListener windowListener = new IWindowListener() {

	public final void windowActivated(final IWorkbenchWindow window) {
	checkActivePart();
	}

	public final void windowClosed(final IWorkbenchWindow window) {
	if (window != null) {
	window.getPartService().removePartListener(partListener);
	}
	checkActivePart();
	}

	public final void windowDeactivated(final IWorkbenchWindow window) {
	checkActivePart();
	}

	public final void windowOpened(final IWorkbenchWindow window) {
	if (window != null) {
	window.getPartService().addPartListener(partListener);
	}
	}

	};

	private Shell lastActiveShell = null;
	public void handleCheck(Shell s) {
	if (s != lastActiveShell) {
	lastActiveShell = s;
	checkActivePart();
	}
	}

	/**
	* The workbench on which this source provider will act.
	*/
	private IWorkbench workbench;

	public final void checkActivePart() {
	final Map currentState = getCurrentState();
	int sources = 0;

	// Figure out what was changed.
	final Object newActivePart = currentState
	.get(ISources.ACTIVE_PART_NAME);
	if (!Util.equals(newActivePart, lastActivePart)) {
	sources \|= ISources.ACTIVE_PART;
	if (newActivePart != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastActivePart = (IWorkbenchPart) newActivePart;
	} else {
	lastActivePart = null;
	}
	}
	final Object newActivePartId = currentState
	.get(ISources.ACTIVE_PART_ID_NAME);
	if (!Util.equals(newActivePartId, lastActivePartId)) {
	sources \|= ISources.ACTIVE_PART_ID;
	if (newActivePartId != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastActivePartId = (String) newActivePartId;
	} else {
	lastActivePartId = null;
	}
	}
	final Object newActivePartSite = currentState
	.get(ISources.ACTIVE_SITE_NAME);
	if (!Util.equals(newActivePartSite, lastActivePartSite)) {
	sources \|= ISources.ACTIVE_SITE;
	if (newActivePartSite != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastActivePartSite = (IWorkbenchPartSite) newActivePartSite;
	} else {
	lastActivePartSite = null;
	}
	}
	final Object newShowInInput = currentState.get(ISources.SHOW_IN_INPUT);
	if (!Util.equals(newShowInInput, lastShowInInput)) {
	sources \|= ISources.ACTIVE_SITE;
	lastShowInInput = newShowInInput;
	}
	final Object newShowInSelection = currentState
	.get(ISources.SHOW_IN_SELECTION);
	if (!Util.equals(newShowInSelection, lastShowInSelection)) {
	sources \|= ISources.ACTIVE_SITE;
	if (newShowInSelection != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastShowInSelection = (ISelection) newShowInSelection;
	} else {
	lastShowInSelection = null;
	}
	}
	final Object newActiveEditor = currentState
	.get(ISources.ACTIVE_EDITOR_NAME);
	if (!Util.equals(newActiveEditor, lastActiveEditor)) {
	sources \|= ISources.ACTIVE_EDITOR;
	if (newActiveEditor != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastActiveEditor = (IEditorPart) newActiveEditor;
	} else {
	lastActiveEditor = null;
	}
	}
	final Object newActiveEditorId = currentState
	.get(ISources.ACTIVE_EDITOR_ID_NAME);
	if (!Util.equals(newActiveEditorId, lastActiveEditorId)) {
	sources \|= ISources.ACTIVE_EDITOR_ID;
	if (newActiveEditorId != IEvaluationContext.UNDEFINED_VARIABLE) {
	lastActiveEditorId = (String) newActiveEditorId;
	} else {
	lastActiveEditorId = null;
	}
	}

	// Fire the event, if something has changed.
	if (sources != 0) {
	if (DEBUG) {
	if ((sources & ISources.ACTIVE_PART) != 0) {
	logDebuggingInfo("Active part changed to " //$NON-NLS-1$
	+ lastActivePart);
	}
	if ((sources & ISources.ACTIVE_PART_ID) != 0) {
	logDebuggingInfo("Active part id changed to " //$NON-NLS-1$
	+ lastActivePartId);
	}
	if ((sources & ISources.ACTIVE_SITE) != 0) {
	logDebuggingInfo("Active site changed to " //$NON-NLS-1$
	+ lastActivePartSite);
	}
	if ((sources & ISources.ACTIVE_EDITOR) != 0) {
	logDebuggingInfo("Active editor changed to " //$NON-NLS-1$
	+ lastActiveEditor);
	}
	if ((sources & ISources.ACTIVE_EDITOR_ID) != 0) {
	logDebuggingInfo("Active editor id changed to " //$NON-NLS-1$
	+ lastActiveEditorId);
	}
	}
	fireSourceChanged(sources, currentState);
	}
	}

	private IShowInSource getShowInSource(IWorkbenchPart sourcePart) {
	return (IShowInSource) Util.getAdapter(sourcePart, IShowInSource.class);
	}

	private ShowInContext getContext(IWorkbenchPart sourcePart) {
	IShowInSource source = getShowInSource(sourcePart);
	if (source != null) {
	ShowInContext context = source.getShowInContext();
	if (context != null) {
	return context;
	}
	} else if (sourcePart instanceof IEditorPart) {
	Object input = ((IEditorPart) sourcePart).getEditorInput();
	ISelectionProvider sp = sourcePart.getSite().getSelectionProvider();
	ISelection sel = sp == null ? null : sp.getSelection();
	return new ShowInContext(input, sel);
	}
	return null;
	}

	public final void dispose() {
	workbench.removeWindowListener(windowListener);
	}

	public final Map getCurrentState() {
	final Map currentState = new HashMap(7);
	currentState.put(ISources.ACTIVE_SITE_NAME,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.ACTIVE_PART_NAME,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.ACTIVE_PART_ID_NAME,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.ACTIVE_EDITOR_NAME,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.ACTIVE_EDITOR_ID_NAME,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.SHOW_IN_INPUT,
	IEvaluationContext.UNDEFINED_VARIABLE);
	currentState.put(ISources.SHOW_IN_SELECTION,
	IEvaluationContext.UNDEFINED_VARIABLE);

	final IWorkbenchWindow activeWorkbenchWindow = getActiveWindow();
	if (activeWorkbenchWindow != null) {
	final IWorkbenchPage activeWorkbenchPage = activeWorkbenchWindow
	.getActivePage();
	if (activeWorkbenchPage != null) {
	// Check the active workbench part.
	final IWorkbenchPart newActivePart = activeWorkbenchPage
	.getActivePart();
	currentState.put(ISources.ACTIVE_PART_NAME, newActivePart);
	if (newActivePart != null) {
	final IWorkbenchPartSite activeWorkbenchPartSite = newActivePart
	.getSite();
	currentState.put(ISources.ACTIVE_SITE_NAME,
	activeWorkbenchPartSite);
	if (activeWorkbenchPartSite != null) {
	final String newActivePartId = activeWorkbenchPartSite
	.getId();
	currentState.put(ISources.ACTIVE_PART_ID_NAME,
	newActivePartId);
	}
	ShowInContext context = getContext(newActivePart);
	if (context != null) {
	Object input = context.getInput();
	if (input != null) {
	currentState.put(ISources.SHOW_IN_INPUT, input);
	}
	ISelection selection = context.getSelection();
	if (selection != null) {
	currentState.put(ISources.SHOW_IN_SELECTION,
	selection);
	}
	}
	}

	// Check the active editor part.
	final IEditorPart newActiveEditor = activeWorkbenchPage
	.getActiveEditor();
	currentState.put(ISources.ACTIVE_EDITOR_NAME, newActiveEditor);
	if (newActiveEditor != null) {
	final IEditorSite activeEditorSite = newActiveEditor
	.getEditorSite();
	if (activeEditorSite != null) {
	final String newActiveEditorId = activeEditorSite
	.getId();
	currentState.put(ISources.ACTIVE_EDITOR_ID_NAME,
	newActiveEditorId);
	}
	}
	}
	}

	return currentState;
	}

	private IWorkbenchWindow getActiveWindow() {
	final Shell newActiveShell = workbench.getDisplay().getActiveShell();
	final IContextService contextService = (IContextService) workbench
	.getService(IContextService.class);
	if (contextService != null) {
	final int shellType = contextService.getShellType(newActiveShell);
	if (shellType != IContextService.TYPE_DIALOG) {
	return workbench.getActiveWorkbenchWindow();
	}
	}
	return null;
	}

	public final String[] getProvidedSourceNames() {
	return PROVIDED_SOURCE_NAMES;
	}

	public void initialize(IServiceLocator locator) {
	IWorkbenchLocationService wls = (IWorkbenchLocationService) locator
	.getService(IWorkbenchLocationService.class);
	workbench = wls.getWorkbench();
	workbench.addWindowListener(windowListener);
	}
	}