| /******************************************************************************* |
| * Copyright (c) 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.contexts; |
| |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.ui.IWorkbench; |
| import org.eclipse.ui.IWorkbenchPartSite; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.contexts.IContextService; |
| import org.eclipse.ui.internal.expressions.ActivePartExpression; |
| import org.eclipse.ui.internal.expressions.WorkbenchWindowExpression; |
| import org.eclipse.ui.services.AbstractServiceFactory; |
| import org.eclipse.ui.services.IServiceLocator; |
| |
| /** |
| * @since 3.4 |
| * |
| */ |
| public class ContextServiceFactory extends AbstractServiceFactory { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.services.AbstractServiceFactory#create(java.lang.Class, |
| * org.eclipse.ui.services.IServiceLocator, |
| * org.eclipse.ui.services.IServiceLocator) |
| */ |
| public Object create(Class serviceInterface, IServiceLocator parentLocator, |
| IServiceLocator locator) { |
| if (!IContextService.class.equals(serviceInterface)) { |
| return null; |
| } |
| final IWorkbench wb = (IWorkbench) locator.getService(IWorkbench.class); |
| if (wb == null) { |
| return null; |
| } |
| |
| Object parent = parentLocator.getService(serviceInterface); |
| if (parent == null) { |
| // we are registering the global services in the Workbench |
| return null; |
| } |
| final IWorkbenchWindow window = (IWorkbenchWindow) locator |
| .getService(IWorkbenchWindow.class); |
| final IWorkbenchPartSite site = (IWorkbenchPartSite) locator |
| .getService(IWorkbenchPartSite.class); |
| if (site == null) { |
| Expression exp = new WorkbenchWindowExpression(window); |
| return new SlaveContextService((IContextService) parent, exp); |
| } |
| if (parent instanceof SlaveContextService) { |
| Expression exp = ((SlaveContextService)parent).fDefaultExpression; |
| if (exp instanceof ActivePartExpression) { |
| return new NestableContextService((IContextService) parent, exp); |
| } |
| } |
| Expression exp = new ActivePartExpression(site.getPart()); |
| return new SlaveContextService((IContextService) parent, exp); |
| } |
| |
| } |