/*******************************************************************************
* Copyright (c) 2000, 2009 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.wst.jsdt.internal.corext.refactoring.changes;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jface.text.IDocument;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.ChangeDescriptor;
import org.eclipse.ltk.core.refactoring.ContentStamp;
import org.eclipse.ltk.core.refactoring.TextFileChange;
import org.eclipse.text.edits.UndoEdit;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.internal.corext.util.JavaModelUtil;
import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
public class CompilationUnitChange extends TextFileChange {
private final IJavaScriptUnit fCUnit;
/** The (optional) refactoring descriptor */
private ChangeDescriptor fDescriptor;
/**
* Creates a new <code>CompilationUnitChange</code>.
*
* @param name the change's name mainly used to render the change in the UI
* @param cunit the compilation unit this text change works on
*/
public CompilationUnitChange(String name, IJavaScriptUnit cunit) {
super(name, getFile(cunit));
Assert.isNotNull(cunit);
fCUnit= cunit;
setTextType("js"); //$NON-NLS-1$
}
private static IFile getFile(IJavaScriptUnit cunit) {
return (IFile) cunit.getResource();
}
/* non java-doc
* Method declared in IChange.
*/
public Object getModifiedElement(){
return fCUnit;
}
/**
* Returns the compilation unit this change works on.
*
* @return the compilation unit this change works on
*/
public IJavaScriptUnit getCompilationUnit() {
return fCUnit;
}
/**
* {@inheritDoc}
*/
protected IDocument acquireDocument(IProgressMonitor pm) throws CoreException {
pm.beginTask("", 2); //$NON-NLS-1$
fCUnit.becomeWorkingCopy(new SubProgressMonitor(pm, 1));
return super.acquireDocument(new SubProgressMonitor(pm, 1));
}
/**
* {@inheritDoc}
*/
protected void releaseDocument(IDocument document, IProgressMonitor pm) throws CoreException {
boolean isModified= isDocumentModified();
super.releaseDocument(document, pm);
try {
fCUnit.discardWorkingCopy();
} finally {
if (isModified && !isDocumentAcquired()) {
if (fCUnit.isWorkingCopy())
JavaModelUtil.reconcile(fCUnit);
else
fCUnit.makeConsistent(pm);
}
}
}
/**
* {@inheritDoc}
*/
protected Change createUndoChange(UndoEdit edit, ContentStamp stampToRestore) {
try {
return new UndoCompilationUnitChange(getName(), fCUnit, edit, stampToRestore, getSaveMode());
} catch (CoreException e) {
JavaScriptPlugin.log(e);
return null;
}
}
/**
* {@inheritDoc}
*/
public Object getAdapter(Class adapter) {
if (IJavaScriptUnit.class.equals(adapter))
return fCUnit;
return super.getAdapter(adapter);
}
/**
* Sets the refactoring descriptor for this change
*
* @param descriptor the descriptor to set
*/
public void setDescriptor(ChangeDescriptor descriptor) {
fDescriptor= descriptor;
}
/**
* {@inheritDoc}
*/
public ChangeDescriptor getDescriptor() {
return fDescriptor;
}
}