/*=============================================================================#
# Copyright (c) 2007-2016 Stephan Wahlbrink (WalWare.de) 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:
# Stephan Wahlbrink - initial API and implementation
#=============================================================================*/
package de.walware.ecommons.ltk.ui;
import java.lang.reflect.InvocationTargetException;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.filebuffers.ITextFileBuffer;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.text.AbstractDocument;
import org.eclipse.jface.text.DocumentRewriteSession;
import org.eclipse.jface.text.ISynchronizable;
import de.walware.ecommons.ui.util.UIAccess;
import de.walware.ecommons.ltk.SourceDocumentRunnable;
import de.walware.ecommons.ltk.core.model.ISourceUnit;
import de.walware.ecommons.ltk.internal.ui.LTKUIPlugin;
/**
* WorkingBuffer using {@link ITextFileBuffer}.
* <p>
* Usually used for editors / the editor context.</p>
*/
public class FileBufferWorkingBuffer extends de.walware.ecommons.ltk.core.impl.FileBufferWorkingBuffer {
public static void syncExec(final SourceDocumentRunnable runnable)
throws InvocationTargetException {
final AtomicReference<InvocationTargetException> error= new AtomicReference<>();
UIAccess.getDisplay().syncExec(new Runnable() {
@Override
public void run() {
Object docLock= null;
final AbstractDocument document= runnable.getDocument();
if (document instanceof ISynchronizable) {
docLock= ((ISynchronizable) document).getLockObject();
}
if (docLock == null) {
docLock= new Object();
}
DocumentRewriteSession rewriteSession= null;
try {
if (runnable.getRewriteSessionType() != null) {
rewriteSession= document.startRewriteSession(runnable.getRewriteSessionType());
}
synchronized (docLock) {
if (runnable.getStampAssertion() > 0 && document.getModificationStamp() != runnable.getStampAssertion()) {
throw new CoreException(new Status(IStatus.ERROR, LTKUIPlugin.PLUGIN_ID,
"Document out of sync (usuallly caused by concurrent document modifications)." ));
}
runnable.run();
}
}
catch (final InvocationTargetException e) {
error.set(e);
}
catch (final Exception e) {
error.set(new InvocationTargetException(e));
}
finally {
if (rewriteSession != null) {
document.stopRewriteSession(rewriteSession);
}
}
}
});
if (error.get() != null) {
throw error.get();
}
}
public FileBufferWorkingBuffer(final ISourceUnit unit) {
super(unit);
}
}