private List <TagSpan <IOutliningRegionTag> > GetOutlineSpans(ITextSnapshot textSnapshot)
{
try
{
var docs = textSnapshot.GetRelatedDocumentsWithChanges();
var doc = docs.First();
var tree = doc.GetSyntaxTreeAsync(_cancellationTokenSource.Token).Result;
var walker = new SytaxWalkerForOutlining(textSnapshot, _ideServices,
_cancellationTokenSource.Token);
walker.Visit(tree.GetRoot());
return(walker.OutlineSpans);
}
catch (OperationCanceledException)
{
return(new List <TagSpan <IOutliningRegionTag> >());
}
}