| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.util; |
| |
| import java.lang.reflect.InvocationTargetException; |
| |
| import org.eclipse.swt.custom.BusyIndicator; |
| |
| import org.eclipse.core.runtime.NullProgressMonitor; |
| import org.eclipse.core.runtime.OperationCanceledException; |
| |
| import org.eclipse.jface.operation.IRunnableContext; |
| import org.eclipse.jface.operation.IRunnableWithProgress; |
| import org.eclipse.jface.operation.ModalContext; |
| |
| /** |
| * A runnable context that shows the busy cursor instead of a progress |
| * monitor. Note, that the UI thread is blocked even if the runnable |
| * is executed in a separate thread by passing <code>fork= true</code> |
| * to the context's run method. Furthermore this context doesn't provide |
| * any UI to cancel the operation. |
| */ |
| public class BusyIndicatorRunnableContext implements IRunnableContext { |
| |
| private static class BusyRunnable implements Runnable { |
| |
| private static class ThreadContext extends Thread { |
| IRunnableWithProgress fRunnable; |
| Throwable fThrowable; |
| |
| public ThreadContext(IRunnableWithProgress runnable) { |
| this(runnable, "BusyCursorRunnableContext-Thread"); //$NON-NLS-1$ |
| } |
| protected ThreadContext(IRunnableWithProgress runnable, String name) { |
| super(name); |
| fRunnable= runnable; |
| } |
| public void run() { |
| try { |
| fRunnable.run(new NullProgressMonitor()); |
| } catch (InvocationTargetException e) { |
| fThrowable= e; |
| } catch (InterruptedException e) { |
| fThrowable= e; |
| } catch (ThreadDeath e) { |
| fThrowable= e; |
| throw e; |
| } catch (RuntimeException e) { |
| fThrowable= e; |
| } catch (Error e) { |
| fThrowable= e; |
| } |
| } |
| void sync() { |
| try { |
| join(); |
| } catch (InterruptedException e) { |
| // ok to ignore exception |
| } |
| } |
| } |
| |
| public Throwable fThrowable; |
| private boolean fFork; |
| private IRunnableWithProgress fRunnable; |
| public BusyRunnable(boolean fork, IRunnableWithProgress runnable) { |
| fFork= fork; |
| fRunnable= runnable; |
| } |
| public void run() { |
| try { |
| internalRun(fFork, fRunnable); |
| } catch (InvocationTargetException e) { |
| fThrowable= e; |
| } catch (InterruptedException e) { |
| fThrowable= e; |
| } |
| } |
| private void internalRun(boolean fork, final IRunnableWithProgress runnable) throws InvocationTargetException, InterruptedException { |
| Thread thread= Thread.currentThread(); |
| // Do not spawn another thread if we are already in a modal context |
| // thread or inside a busy context thread. |
| if (thread instanceof ThreadContext || ModalContext.isModalContextThread(thread)) |
| fork= false; |
| |
| if (fork) { |
| final ThreadContext t= new ThreadContext(runnable); |
| t.start(); |
| t.sync(); |
| // Check if the separate thread was terminated by an exception |
| Throwable throwable= t.fThrowable; |
| if (throwable != null) { |
| if (throwable instanceof InvocationTargetException) { |
| throw (InvocationTargetException) throwable; |
| } else if (throwable instanceof InterruptedException) { |
| throw (InterruptedException) throwable; |
| } else if (throwable instanceof OperationCanceledException) { |
| throw new InterruptedException(); |
| } else { |
| throw new InvocationTargetException(throwable); |
| } |
| } |
| } else { |
| try { |
| runnable.run(new NullProgressMonitor()); |
| } catch (OperationCanceledException e) { |
| throw new InterruptedException(); |
| } |
| } |
| } |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IRunnableContext. |
| */ |
| public void run(boolean fork, boolean cancelable, IRunnableWithProgress runnable) throws InvocationTargetException, InterruptedException { |
| BusyRunnable busyRunnable= new BusyRunnable(fork, runnable); |
| BusyIndicator.showWhile(null, busyRunnable); |
| Throwable throwable= busyRunnable.fThrowable; |
| if (throwable instanceof InvocationTargetException) { |
| throw (InvocationTargetException)throwable; |
| } else if (throwable instanceof InterruptedException) { |
| throw (InterruptedException)throwable; |
| } |
| } |
| } |