use of org.eclipse.ltk.core.refactoring.ContentStamp in project che by eclipse.
the class MultiStateUndoChange method perform.
/**
* {@inheritDoc}
*/
public Change perform(IProgressMonitor pm) throws CoreException {
if (fValidationState == null || fValidationState.isValid(needsSaving(), false).hasFatalError())
return new NullChange();
if (pm == null)
pm = new NullProgressMonitor();
ITextFileBufferManager manager = FileBuffers.getTextFileBufferManager();
//$NON-NLS-1$
pm.beginTask("", 2);
ITextFileBuffer buffer = null;
try {
manager.connect(fFile.getFullPath(), LocationKind.IFILE, new SubProgressMonitor(pm, 1));
buffer = manager.getTextFileBuffer(fFile.getFullPath(), LocationKind.IFILE);
IDocument document = buffer.getDocument();
ContentStamp currentStamp = ContentStamps.get(fFile, document);
// perform the changes
LinkedList list = new LinkedList();
for (int index = 0; index < fUndos.length; index++) {
UndoEdit edit = fUndos[index];
UndoEdit redo = edit.apply(document, TextEdit.CREATE_UNDO);
list.addFirst(redo);
}
// try to restore the document content stamp
boolean success = ContentStamps.set(document, fContentStampToRestore);
if (needsSaving()) {
buffer.commit(pm, false);
if (!success) {
// We weren't able to restore document stamp.
// Since we save restore the file stamp instead
ContentStamps.set(fFile, fContentStampToRestore);
}
}
return createUndoChange((UndoEdit[]) list.toArray(new UndoEdit[list.size()]), currentStamp);
} catch (BadLocationException e) {
throw Changes.asCoreException(e);
} finally {
if (buffer != null)
manager.disconnect(fFile.getFullPath(), LocationKind.IFILE, new SubProgressMonitor(pm, 1));
}
}
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