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/*******************************************************************************
* Copyright (c) 2010 Peter Stibrany 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:
* Peter Stibrany - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.commands;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.action.ContributionItem;
import org.eclipse.mylyn.internal.tasks.ui.ITaskAttachmentViewer;
import org.eclipse.mylyn.internal.tasks.ui.TaskAttachmentViewerManager;
import org.eclipse.mylyn.internal.tasks.ui.util.AttachmentUtil;
import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal;
import org.eclipse.mylyn.tasks.core.ITaskAttachment;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.ui.IEditorRegistry;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
/**
* @author Peter Stibrany
*/
public class OpenTaskAttachmentWithMenu extends ContributionItem {
private final TaskAttachmentViewerManager manager = new TaskAttachmentViewerManager();
public OpenTaskAttachmentWithMenu() {
}
public OpenTaskAttachmentWithMenu(String id) {
super(id);
}
@Override
public void fill(Menu menu, int index) {
List<ITaskAttachment> attachments = AttachmentUtil.getSelectedAttachments(null);
if (attachments.isEmpty() || attachments.size() > 1) {
return;
}
// find all interesting editors, and add them into menu
ITaskAttachment attachment = attachments.get(0);
String viewerId = manager.getPreferredViewerID(attachment);
int itemsAdded = 0;
ITaskAttachmentViewer viewer = manager.getBrowserViewer(attachment);
if (viewer != null) {
itemsAdded = addItems(menu, index, Collections.singletonList(viewer), attachments, viewerId);
index += itemsAdded;
}
int defaultViewerIndex = -1;
List<ITaskAttachmentViewer> viewers = manager.getWorkbenchViewers(attachment);
if (viewers.size() > 0) {
itemsAdded = addSeparator(menu, index, itemsAdded);
index += itemsAdded;
for (int i = 0; i < viewers.size(); i++) {
if (viewers.get(i).isWorkbenchDefault()) {
defaultViewerIndex = index + i;
}
}
itemsAdded = addItems(menu, index, viewers, attachments, viewerId);
index += itemsAdded;
}
viewers = manager.getSystemViewers(attachment);
if (viewers.size() > 0) {
itemsAdded = addSeparator(menu, index, itemsAdded);
index += itemsAdded;
if (defaultViewerIndex == -1 && Platform.getOS().equals(Platform.OS_WIN32)) {
for (int i = 0; i < viewers.size(); i++) {
if (IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID.equals(viewers.get(i).getId())) {
defaultViewerIndex = index + i;
}
}
}
itemsAdded = addItems(menu, index, viewers, attachments, viewerId);
index += itemsAdded;
}
if (defaultViewerIndex != -1) {
boolean selectedPreferredViewer = false;
for (MenuItem item : menu.getItems()) {
if (item.getSelection()) {
selectedPreferredViewer = true;
break;
}
}
if (!selectedPreferredViewer) {
menu.getItem(defaultViewerIndex).setSelection(true);
}
}
}
protected int addSeparator(Menu menu, int index, int itemsAdded) {
if (itemsAdded > 0) {
new MenuItem(menu, SWT.SEPARATOR, index);
return 1;
}
return 0;
}
protected int addItems(Menu menu, int index, List<ITaskAttachmentViewer> viewers,
List<ITaskAttachment> attachments, String viewerId) {
int i = 0;
for (ITaskAttachmentViewer viewer : viewers) {
MenuItem item = new MenuItem(menu, SWT.RADIO, index + i);
item.setText(viewer.getLabel());
item.addSelectionListener(new RunAssociatedViewer(viewer, attachments));
if (viewerId != null && viewerId.equals(viewer.getId())) {
item.setSelection(true);
}
i++;
}
return i;
}
private class RunAssociatedViewer extends SelectionAdapter {
private final ITaskAttachmentViewer viewer;
private final List<ITaskAttachment> attachments;
RunAssociatedViewer(ITaskAttachmentViewer handler, List<ITaskAttachment> attachments) {
this.attachments = attachments;
this.viewer = handler;
}
@Override
public void widgetSelected(SelectionEvent event) {
if (!((MenuItem) event.widget).getSelection()) {
// if the default viewer changes ignore the event for the unselected menu item
return;
}
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window != null) {
IWorkbenchPage page = window.getActivePage();
if (page != null) {
// this event is fired also for item which gets unselected (i.e. previous 'preferred' viewer)
try {
for (ITaskAttachment attachment : attachments) {
manager.savePreferredViewerID(attachment, viewer.getId());
try {
viewer.openAttachment(page, attachment);
} catch (CoreException e) {
TasksUiInternal.logAndDisplayStatus(
Messages.OpenTaskAttachmentHandler_failedToOpenViewer, e.getStatus());
}
}
} catch (OperationCanceledException e) {
// canceled
}
}
}
}
}
@Override
public boolean isDynamic() {
// menu depends on selected attachment(s)
return true;
}
}
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