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/*******************************************************************************
* Copyright (c) 2009 itemis AG (http://www.itemis.eu) 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
*******************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.xtext.glue.editingdomain;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.transaction.RecordingCommand;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.xtext.resource.XtextResource;
/**
* A Command that deactivates the {@link ChangeAggregatorAdapter} and updates a textual section of an Xtext model in an
* Xtext resource. Used to avoid cycles in the change aggregation.
*
* @author koehnlein
*/
public class UpdateXtextResourceTextCommand {
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
* @param xtextResource
* @param offset
* @param length
* @param newText
* @return Command
*/
public static Command createEMFCommand(final XtextResource xtextResource, final int offset, final int length,
final String newText) {
final TransactionalEditingDomain editingDomain = TransactionUtil.getEditingDomain(xtextResource);
if (editingDomain == null) {
return null;
}
ResourceSet resourceSet = editingDomain.getResourceSet();
final ChangeAggregatorAdapter changeAggregator = (ChangeAggregatorAdapter) EcoreUtil.getAdapter(resourceSet
.eAdapters(), ChangeAggregatorAdapter.class);
return new RecordingCommand(editingDomain, "update xtext resource") {
@Override
protected void doExecute() {
try {
if (changeAggregator != null) {
changeAggregator.setSuspended(true);
}
xtextResource.update(offset, length, newText);
xtextResource.setModified(true);
} finally {
if (changeAggregator != null) {
changeAggregator.setSuspended(false);
}
}
}
};
}
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
* @param xtextResource
* @param offset
* @param length
* @param newText
* @return ICommand
*/
public static ICommand createUpdateCommand(final XtextResource xtextResource, final int offset, final int length,
final String newText) {
final TransactionalEditingDomain editingDomain = TransactionUtil.getEditingDomain(xtextResource);
if (editingDomain == null) {
return null;
}
ResourceSet resourceSet = editingDomain.getResourceSet();
final ChangeAggregatorAdapter changeAggregator = (ChangeAggregatorAdapter) EcoreUtil.getAdapter(resourceSet
.eAdapters(), ChangeAggregatorAdapter.class);
return new AbstractTransactionalCommand(editingDomain, "update xtext resource", null) {
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
try {
if (changeAggregator != null) {
changeAggregator.setSuspended(true);
}
xtextResource.update(offset, length, newText);
xtextResource.setModified(true);
return CommandResult.newOKCommandResult();
} catch (Exception exc) {
return CommandResult.newErrorCommandResult(exc);
} finally {
if (changeAggregator != null) {
changeAggregator.setSuspended(false);
}
}
}
};
}
}
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