| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal; |
| |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Synchronizer; |
| |
| public class UISynchronizer extends Synchronizer { |
| protected UIWorkspaceLock uiLock; |
| public UISynchronizer(Display display, UIWorkspaceLock lock) { |
| super(display); |
| this.uiLock = lock; |
| } |
| public void syncExec(Runnable runnable) { |
| if ((runnable == null) || uiLock.isUI() || !uiLock.isCurrentOperation()) { |
| super.syncExec(runnable); |
| return; |
| } |
| Runnable runOnce = new Runnable() { |
| public void run() { |
| uiLock.doPendingWork(); |
| } |
| }; |
| Semaphore work = new Semaphore(runnable); |
| work.setOperationThread(Thread.currentThread()); |
| uiLock.addPendingWork(work); |
| if (!uiLock.isUIWaiting()) |
| asyncExec(runOnce); |
| else |
| uiLock.interruptUI(); |
| try { |
| work.acquire(); |
| } catch (InterruptedException e) { |
| } |
| } |
| } |
