| /******************************************************************************* |
| * Copyright (c) 2004, 2011 Eugene Kuleshov and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * https://www.eclipse.org/legal/epl-2.0 |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Eugene Kuleshov - initial API and implementation |
| * Tasktop Technologies - improvements |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.tasks.ui; |
| |
| import java.util.Map; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.mylyn.internal.tasks.core.AbstractTask; |
| import org.eclipse.mylyn.internal.tasks.core.TaskActivationHistory; |
| import org.eclipse.mylyn.internal.tasks.ui.actions.ActivateTaskDialogAction; |
| import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal; |
| import org.eclipse.mylyn.tasks.ui.TasksUi; |
| import org.eclipse.mylyn.tasks.ui.TasksUiImages; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.commands.IElementUpdater; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| import org.eclipse.ui.menus.UIElement; |
| |
| /** |
| * @author Eugene Kuleshov |
| * @author Steffen Pingel |
| */ |
| public class TaskHistoryHandler extends AbstractHandler implements IElementUpdater { |
| |
| public Object execute(final ExecutionEvent event) throws ExecutionException { |
| if (TasksUi.getTaskActivityManager().getActiveTask() != null) { |
| TasksUi.getTaskActivityManager().deactivateActiveTask(); |
| } else { |
| TaskActivationHistory taskHistory = TasksUiPlugin.getTaskActivityManager().getTaskActivationHistory(); |
| if (taskHistory.hasPrevious()) { |
| AbstractTask previousTask = taskHistory.getPreviousTask(); |
| if (previousTask != null && !previousTask.isActive()) { |
| TasksUiInternal.activateTaskThroughCommand(previousTask); |
| } |
| } else { |
| IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event); |
| if (window != null) { |
| ActivateTaskDialogAction action = new ActivateTaskDialogAction(); |
| action.init(window); |
| action.run(null); |
| } |
| } |
| } |
| return null; |
| } |
| |
| @SuppressWarnings("rawtypes") |
| public void updateElement(UIElement element, Map parameters) { |
| if (TasksUi.getTaskActivityManager().getActiveTask() == null) { |
| element.setIcon(TasksUiImages.CONTEXT_HISTORY_PREVIOUS); |
| } else { |
| element.setIcon(TasksUiImages.CONTEXT_HISTORY_PREVIOUS_ACTIVE); |
| } |
| } |
| |
| } |