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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.xtext.gmf.glue.editingdomain;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.IOperationHistory;
import org.eclipse.core.commands.operations.IOperationHistoryListener;
import org.eclipse.core.commands.operations.OperationHistoryEvent;
import org.eclipse.emf.common.command.CommandStack;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.TransactionalEditingDomainEvent;
import org.eclipse.emf.transaction.TransactionalEditingDomainListener;
import org.eclipse.emf.transaction.TransactionalEditingDomain.Lifecycle;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.emf.workspace.IWorkspaceCommandStack;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.xtext.gmf.glue.Activator;
//import org.eclipse.xtext.parsetree.CompositeNode;
//import org.eclipse.xtext.parsetree.NodeAdapter;
//import org.eclipse.xtext.parsetree.NodeUtil;
import org.eclipse.xtext.parsetree.reconstr.Serializer;
import org.eclipse.xtext.resource.XtextResource;
/**
* Reconciles the node models of all XtextResources in a TransactionalEditingDomain with semantic changes.
*
* @author koehnlein
*/
public class XtextNodeModelReconciler extends AdapterImpl implements TransactionalEditingDomainListener,
IOperationHistoryListener {
private TransactionalEditingDomain editingDomain;
private ChangeAggregatorAdapter changeAggregator;
private XtextNodeModelReconciler(TransactionalEditingDomain editingDomain) {
this.editingDomain = editingDomain;
Lifecycle lifecycle = TransactionUtil.getAdapter(editingDomain, Lifecycle.class);
lifecycle.addTransactionalEditingDomainListener(this);
changeAggregator = new ChangeAggregatorAdapter();
editingDomain.getResourceSet().eAdapters().add(changeAggregator);
CommandStack commandStack = editingDomain.getCommandStack();
if (commandStack instanceof IWorkspaceCommandStack) {
IOperationHistory operationHistory = ((IWorkspaceCommandStack) commandStack).getOperationHistory();
operationHistory.addOperationHistoryListener(this);
}
changeAggregator.beginRecording();
}
public void editingDomainDisposing(TransactionalEditingDomainEvent event) {
changeAggregator.endRecording();
CommandStack commandStack = editingDomain.getCommandStack();
if (commandStack instanceof IWorkspaceCommandStack) {
IOperationHistory operationHistory = ((IWorkspaceCommandStack) commandStack).getOperationHistory();
operationHistory.removeOperationHistoryListener(this);
}
editingDomain.getResourceSet().eAdapters().remove(changeAggregator);
Lifecycle lifecycle = TransactionUtil.getAdapter(editingDomain, Lifecycle.class);
lifecycle.removeTransactionalEditingDomainListener(XtextNodeModelReconciler.this);
}
public void transactionClosed(TransactionalEditingDomainEvent event) {
// ignore
}
public void transactionClosing(TransactionalEditingDomainEvent event) {
// ignore
}
public void transactionInterrupted(TransactionalEditingDomainEvent event) {
// ignore
}
public void transactionStarted(TransactionalEditingDomainEvent event) {
// ignore
}
public void transactionStarting(TransactionalEditingDomainEvent event) {
// ignore
}
/**
* This element comes from the XText/GMF integration example, and was not originally documented.
* @param editingDomain
* @return XtextNodeModelReconciler
*
*/
public static XtextNodeModelReconciler adapt(TransactionalEditingDomain editingDomain) {
XtextNodeModelReconciler adapter = (XtextNodeModelReconciler) EcoreUtil.getAdapter(editingDomain
.getResourceSet().eAdapters(), XtextNodeModelReconciler.class);
if (adapter == null) {
adapter = new XtextNodeModelReconciler(editingDomain);
}
return adapter;
}
public void historyNotification(OperationHistoryEvent event) {
int eventType = event.getEventType();
// switch (eventType) {
// case OperationHistoryEvent.DONE:
// case OperationHistoryEvent.UNDONE:
// case OperationHistoryEvent.REDONE:
// changeAggregator.endRecording();
// ICommand updateXtextResourceTextCommand = null;
// for (EObject modificationRoot : changeAggregator.getModificationRoots()) {
// XtextResource xtextResource = (XtextResource) modificationRoot.eResource();
// NodeAdapter nodeAdapter = NodeUtil.getNodeAdapter(modificationRoot);
// CompositeNode parserNode = nodeAdapter.getParserNode();
// Serializer serializer = xtextResource.getSerializer();
// String newText = serializer.serialize(modificationRoot);
// ICommand newCommand = UpdateXtextResourceTextCommand.createUpdateCommand(xtextResource, parserNode
// .getOffset(), parserNode.getLength(), newText);
// if (updateXtextResourceTextCommand == null) {
// updateXtextResourceTextCommand = newCommand;
// } else {
// updateXtextResourceTextCommand.compose(newCommand);
// }
// }
// try {
// if (updateXtextResourceTextCommand != null) {
// updateXtextResourceTextCommand.execute(null, null);
// }
// } catch (ExecutionException exc) {
// Activator.logError(exc);
// }
// changeAggregator.beginRecording();
// break;
// default:
// // ignore
// }
}
}
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