| /******************************************************************************* |
| * Copyright (c) 2007, 2017 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Stefan Dirix (sdirix@eclipsesource.com) - Bug 473847: Minimum E4 Compatibility of Compare |
| *******************************************************************************/ |
| package org.eclipse.compare.internal; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.compare.ICompareContainer; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.commands.ActionHandler; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.ActiveShellExpression; |
| import org.eclipse.ui.IActionBars; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.handlers.IHandlerActivation; |
| import org.eclipse.ui.handlers.IHandlerService; |
| import org.eclipse.ui.services.IServiceLocator; |
| |
| public class CompareHandlerService { |
| |
| private final List<IHandlerActivation> fActivations = new ArrayList<>(); |
| private final Expression fExpression; |
| private ICompareContainer fContainer; |
| private boolean fDisposed; |
| private List<IHandlerActivation> fPaneActivations = new ArrayList<>(); |
| private IHandlerService fHandlerService; |
| |
| public static CompareHandlerService createFor(ICompareContainer container, Shell shell) { |
| IServiceLocator serviceLocator = container.getServiceLocator(); |
| if (serviceLocator != null) { |
| IHandlerService service = serviceLocator.getService(IHandlerService.class); |
| if (service != null) |
| return new CompareHandlerService(container, null); |
| } |
| if (!PlatformUI.isWorkbenchRunning() && shell != null) { |
| Expression e = new ActiveShellExpression(shell); |
| return new CompareHandlerService(container, e); |
| } |
| if (container.getWorkbenchPart() == null && shell != null) { |
| // We're in a dialog so we can use an active shell expression |
| IHandlerService service = PlatformUI.getWorkbench().getService(IHandlerService.class); |
| if (service != null) { |
| Expression e = new ActiveShellExpression(shell); |
| return new CompareHandlerService(container, e); |
| } |
| } |
| return new CompareHandlerService(null, null); |
| } |
| |
| private CompareHandlerService(ICompareContainer container, |
| Expression expression) { |
| fContainer = container; |
| fExpression = expression; |
| initialize(); |
| } |
| |
| public void registerAction(IAction action, String commandId) { |
| IHandlerService handlerService = getHandlerService(); |
| if (handlerService == null) |
| return; |
| action.setActionDefinitionId(commandId); |
| IHandlerActivation activation; |
| if (fExpression == null) { |
| activation = handlerService.activateHandler(commandId, new ActionHandler(action)); |
| } else { |
| activation = handlerService.activateHandler(commandId, new ActionHandler(action), fExpression); |
| } |
| if (activation != null) { |
| fActivations .add(activation); |
| } |
| } |
| |
| private IHandlerService getHandlerService() { |
| if (fDisposed) |
| return null; |
| return fHandlerService; |
| } |
| |
| private void initialize() { |
| if (fHandlerService == null) { |
| IServiceLocator serviceLocator = fContainer.getServiceLocator(); |
| if (serviceLocator != null) { |
| IHandlerService service = serviceLocator.getService(IHandlerService.class); |
| if (service != null) |
| fHandlerService = service; |
| } |
| if (PlatformUI.isWorkbenchRunning() && fHandlerService == null && fContainer.getWorkbenchPart() == null && fExpression != null) { |
| // We're in a dialog so we can use an active shell expression |
| IHandlerService service = PlatformUI.getWorkbench().getService(IHandlerService.class); |
| if (service != null) { |
| fHandlerService = service; |
| } |
| } |
| } |
| } |
| |
| public void setGlobalActionHandler(String actionId, IAction actionHandler) { |
| IActionBars bars = getActionBars(); |
| if (bars != null) { |
| bars.setGlobalActionHandler(actionId, actionHandler); |
| return; |
| } else if (fExpression != null && actionHandler != null && actionHandler.getActionDefinitionId() != null) { |
| IHandlerService service = getHandlerService(); |
| if (service != null) { |
| IHandlerActivation activation = service.activateHandler(actionHandler.getActionDefinitionId(), new ActionHandler(actionHandler), fExpression); |
| fPaneActivations.add(activation); |
| return; |
| } |
| } |
| // Remove the action definition id since we won't get key bindings |
| if (actionHandler != null) |
| actionHandler.setActionDefinitionId(null); |
| } |
| |
| private void updateActionBars() { |
| IActionBars bars = getActionBars(); |
| if (bars != null) |
| bars.updateActionBars(); |
| } |
| |
| private void clearPaneActionHandlers() { |
| if (!fPaneActivations.isEmpty()) { |
| IHandlerService service = getHandlerService(); |
| if (service != null) { |
| service.deactivateHandlers(fPaneActivations); |
| fPaneActivations.clear(); |
| } |
| } |
| } |
| |
| private IActionBars getActionBars() { |
| return fContainer.getActionBars(); |
| } |
| |
| public void dispose() { |
| clearPaneActionHandlers(); |
| IHandlerService service = getHandlerService(); |
| if (service == null) |
| return; |
| service.deactivateHandlers(fActivations); |
| fActivations.clear(); |
| fDisposed = true; |
| } |
| |
| public void updatePaneActionHandlers(Runnable runnable) { |
| clearPaneActionHandlers(); |
| runnable.run(); |
| updateActionBars(); |
| } |
| } |