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/*******************************************************************************
* Copyright (c) 2004, 2011 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.mylyn.commons.ui.CommonUiUtil;
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.internal.tasks.ui.workingsets.TaskWorkingSetUpdater;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.mylyn.tasks.core.ITaskContainer;
import org.eclipse.mylyn.tasks.ui.TaskElementLabelProvider;
import org.eclipse.mylyn.tasks.ui.TasksUi;
import org.eclipse.mylyn.tasks.ui.TasksUiUtil;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.CompoundContributionItem;
/**
* @author Wesley Coelho
* @author Mik Kersten
* @author Leo Dos Santos
* @author Steffen Pingel
* @author Sam Davis
*/
public class TaskHistoryDropDown extends CompoundContributionItem {
private final static int MAX_ITEMS_TO_DISPLAY = 16;
private class ActivateDialogAction extends Action {
private final ActivateTaskDialogAction dialogAction;
public ActivateDialogAction(ActivateTaskDialogAction action) {
dialogAction = action;
dialogAction.init(PlatformUI.getWorkbench().getActiveWorkbenchWindow());
setText(Messages.TaskHistoryDropDown_Activate_Task_);
setToolTipText(Messages.TaskHistoryDropDown_Activate_Task_);
setEnabled(true);
setChecked(false);
setImageDescriptor(null);
//TasksUiImages.TASK_ACTIVE);
}
@Override
public void run() {
dialogAction.run(null);
}
}
private class DeactivateTaskAction extends Action {
public DeactivateTaskAction() {
setText(Messages.TaskHistoryDropDown_Deactivate_Task);
setToolTipText(Messages.TaskHistoryDropDown_Deactivate_Task);
setEnabled(true);
setChecked(false);
setImageDescriptor(null);
//TasksUiImages.TASK_INACTIVE);
}
@Override
public void run() {
ITask active = TasksUi.getTaskActivityManager().getActiveTask();
if (active != null) {
TasksUi.getTaskActivityManager().deactivateTask(active);
}
}
}
/**
* Action for navigating to a specified task. This class should be protected but has been made public for testing
* only
*/
private class ActivateTaskAction extends Action {
private static final int MAX_LABEL_LENGTH = 40;
private final AbstractTask targetTask;
public ActivateTaskAction(AbstractTask task) {
targetTask = task;
String taskDescription = task.getSummary();
if (taskDescription.length() > MAX_LABEL_LENGTH) {
taskDescription = taskDescription.subSequence(0, MAX_LABEL_LENGTH - 3) + "..."; //$NON-NLS-1$
}
taskDescription = CommonUiUtil.toMenuLabel(taskDescription);
setText(taskDescription);
setEnabled(true);
setToolTipText(task.getSummary());
Image image = labelProvider.getImage(task);
setImageDescriptor(ImageDescriptor.createFromImage(image));
}
@Override
public void run() {
if (targetTask.isActive()) {
return;
}
TasksUiInternal.activateTaskThroughCommand(targetTask);
}
@Override
public void runWithEvent(Event event) {
run();
if ((event.stateMask & SWT.SHIFT) != 0) {
TasksUiUtil.openTask(targetTask);
}
}
}
private final TaskElementLabelProvider labelProvider = new TaskElementLabelProvider(false);
private boolean scopedToWorkingSet;
private final TaskActivationHistory taskHistory;
public TaskHistoryDropDown() {
this(null);
}
public TaskHistoryDropDown(String id) {
this(id, TasksUiPlugin.getTaskActivityManager().getTaskActivationHistory());
}
public TaskHistoryDropDown(String id, TaskActivationHistory taskHistory) {
super(id);
this.taskHistory = taskHistory;
}
@Override
protected IContributionItem[] getContributionItems() {
List<AbstractTask> tasks = new ArrayList<AbstractTask>(taskHistory.getPreviousTasks());
Set<IWorkingSet> sets = TaskWorkingSetUpdater.getActiveWorkingSets(PlatformUI.getWorkbench()
.getActiveWorkbenchWindow());
if (scopedToWorkingSet && !sets.isEmpty()) {
Set<ITask> allWorkingSetTasks = new HashSet<ITask>();
for (IWorkingSet workingSet : sets) {
IAdaptable[] elements = workingSet.getElements();
for (IAdaptable adaptable : elements) {
if (adaptable instanceof ITaskContainer) {
allWorkingSetTasks.addAll(((ITaskContainer) adaptable).getChildren());
}
}
}
List<AbstractTask> allScopedTasks = new ArrayList<AbstractTask>(tasks);
for (ITask task : tasks) {
if (!allWorkingSetTasks.contains(task)) {
allScopedTasks.remove(task);
}
}
tasks = allScopedTasks;
}
if (tasks.size() > MAX_ITEMS_TO_DISPLAY) {
tasks = tasks.subList(tasks.size() - MAX_ITEMS_TO_DISPLAY, tasks.size());
}
List<IContributionItem> items = new ArrayList<IContributionItem>();
for (int i = tasks.size() - 1; i >= 0; i--) {
AbstractTask currTask = tasks.get(i);
Action taskNavAction = new ActivateTaskAction(currTask);
ActionContributionItem item = new ActionContributionItem(taskNavAction);
if (currTask.isActive()) {
taskNavAction.setChecked(true);
}
items.add(item);
}
if (items.size() > 0) {
Separator separator = new Separator();
items.add(separator);
}
final ITask active = TasksUi.getTaskActivityManager().getActiveTask();
if (active != null) {
Action deactivateAction = new DeactivateTaskAction();
ActionContributionItem item = new ActionContributionItem(deactivateAction);
items.add(item);
items.add(new ActionContributionItem(new Action(Messages.TaskHistoryDropDown_Open_Active_Task) {
@Override
public void run() {
TasksUiInternal.openTask(active, active.getTaskId());
}
}));
} else {
Action activateDialogAction = new ActivateDialogAction(new ActivateTaskDialogAction());
ActionContributionItem item = new ActionContributionItem(activateDialogAction);
items.add(item);
}
return items.toArray(new IContributionItem[items.size()]);
}
public boolean isScopedToWorkingSet() {
return scopedToWorkingSet;
}
/**
* If <code>scopedToWorkingSet</code> is set to true only tasks from the current working set are contributed.
*/
public void setScopedToWorkingSet(boolean scopedToWorkingSet) {
this.scopedToWorkingSet = scopedToWorkingSet;
}
}
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