/*******************************************************************************
* Copyright (c) 2000, 2007 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
*
*******************************************************************************/
package org.eclipse.dltk.internal.corext.refactoring.changes;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.dltk.core.ISourceModule;
import org.eclipse.dltk.internal.core.manipulation.Messages;
import org.eclipse.dltk.internal.core.manipulation.ScriptManipulationPlugin;
import org.eclipse.dltk.internal.corext.refactoring.RefactoringCoreMessages;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.ContentStamp;
import org.eclipse.ltk.core.refactoring.UndoTextFileChange;
import org.eclipse.text.edits.UndoEdit;
public class UndoSourceModuleChange extends UndoTextFileChange {
private ISourceModule fCUnit;
public UndoSourceModuleChange(String name, ISourceModule unit, UndoEdit undo, ContentStamp stampToRestore, int saveMode) throws CoreException {
super(name, getFile(unit), undo, stampToRestore, saveMode);
fCUnit= unit;
}
private static IFile getFile(ISourceModule cunit) throws CoreException {
IFile file= (IFile)cunit.getResource();
if (file == null)
throw new CoreException(new Status(
IStatus.ERROR,
ScriptManipulationPlugin.getPluginId(),
IStatus.ERROR,
Messages.format(
RefactoringCoreMessages.UndoSourceModuleChange_no_resource,
cunit.getElementName()),
null)
);
return file;
}
/**
* {@inheritDoc}
*/
public Object getModifiedElement() {
return fCUnit;
}
/**
* {@inheritDoc}
*/
protected Change createUndoChange(UndoEdit edit, ContentStamp stampToRestore) throws CoreException {
return new UndoSourceModuleChange(getName(), fCUnit, edit, stampToRestore, getSaveMode());
}
/**
* {@inheritDoc}
*/
public Change perform(IProgressMonitor pm) throws CoreException {
pm.beginTask("", 2); //$NON-NLS-1$
fCUnit.becomeWorkingCopy(null, new SubProgressMonitor(pm,1));
try {
return super.perform(new SubProgressMonitor(pm,1));
} finally {
fCUnit.discardWorkingCopy();
}
}
}