public IEnumerable <ITagSpan <TTag> > GetTags(NormalizedSnapshotSpanCollection requestedSpans)
{
if (requestedSpans.Count == 0)
{
return(SpecializedCollections.EmptyEnumerable <ITagSpan <TTag> >());
}
var buffer = requestedSpans.First().Snapshot.TextBuffer;
var tags = _tagSource.GetTagIntervalTreeForBuffer(buffer);
if (tags == null)
{
return(SpecializedCollections.EmptyEnumerable <ITagSpan <TTag> >());
}
var result = GetTags(requestedSpans, tags);
DebugVerifyTags(requestedSpans, result);
return(result);
}
public IEnumerable <ITagSpan <TTag> > GetTags(NormalizedSnapshotSpanCollection requestedSpans)
{
if (requestedSpans.Count == 0)
{
return(SpecializedCollections.EmptyEnumerable <ITagSpan <TTag> >());
}
var buffer = requestedSpans.First().Snapshot.TextBuffer;
var tags = _tagSource.GetTagIntervalTreeForBuffer(buffer);
if (tags == null)
{
return(SpecializedCollections.EmptyEnumerable <ITagSpan <TTag> >());
}
// Special case the case where there is only one requested span. In that case, we don't
// need to allocate any intermediate collections
return(requestedSpans.Count == 1
? tags.GetIntersectingSpans(requestedSpans[0])
: requestedSpans.Count < MaxNumberOfRequestedSpans
? GetTagsForSmallNumberOfSpans(requestedSpans, tags)
: GetTagsForLargeNumberOfSpans(requestedSpans, tags));
}