@Override
public RefactoringStatus checkInitialConditions(final IProgressMonitor monitor)
throws CoreException {
final SubMonitor progress = SubMonitor.convert(monitor, 6);
RAstNode rootNode = null;
try {
if (fSelectionRegion != null) {
fSourceUnit.connect(progress.newChild(1));
try {
final AbstractDocument document = fSourceUnit.getDocument(monitor);
final RHeuristicTokenScanner scanner = fAdapter.getScanner(fSourceUnit);
final IRModelInfo modelInfo =
(IRModelInfo)
fSourceUnit.getModelInfo(
RModel.TYPE_ID, IRModelManager.MODEL_FILE, progress.newChild(1));
if (modelInfo != null) {
final IRegion region = fAdapter.trimToAstRegion(document, fSelectionRegion, scanner);
final AstInfo ast = modelInfo.getAst();
if (ast != null) {
rootNode =
(RAstNode)
AstSelection.search(
ast.root,
region.getOffset(),
region.getOffset() + region.getLength(),
AstSelection.MODE_COVERING_SAME_LAST)
.getCovering();
}
}
} finally {
fSourceUnit.disconnect(progress.newChild(1));
}
}
if (rootNode == null) {
return RefactoringStatus.createFatalErrorStatus(
Messages.ExtractTemp_error_InvalidSelection_message);
}
final RefactoringStatus result = new RefactoringStatus();
fAdapter.checkInitialToModify(result, fElementSet);
progress.worked(1);
if (result.hasFatalError()) {
return result;
}
searchVariables(rootNode, result);
progress.worked(2);
return result;
} finally {
progress.done();
}
}
