public IEnumerable <ITagSpan <IClassificationTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
using (Logger.LogBlock(FunctionId.Tagger_SyntacticClassification_TagComputer_GetTags, CancellationToken.None))
{
if (!_cachedTaggableStatus.HasValue)
{
if (!_isClassificationOnlyWorkspace)
{
_cachedTaggableStatus = true;
}
else
{
var wpfTextViews = _associatedViewService.GetAssociatedTextViews(_subjectBuffer);
if (wpfTextViews.Any())
{
_cachedTaggableStatus = _viewSupportsClassificationServiceOpt?.CanClassifyViews(wpfTextViews.Cast <ITextView>()) ?? true;
}
}
}
if (_cachedTaggableStatus == false)
{
return(SpecializedCollections.EmptyEnumerable <ITagSpan <IClassificationTag> >());
}
if (spans.Count > 0)
{
var classifiedSpans = ClassificationUtilities.GetOrCreateClassifiedSpanList();
foreach (var span in spans)
{
AddClassifiedSpans(_editorClassificationService, span, classifiedSpans);
}
return(ClassificationUtilities.ConvertAndReturnList(_typeMap, spans[0].Snapshot, classifiedSpans));
}
return(SpecializedCollections.EmptyEnumerable <ITagSpan <IClassificationTag> >());
}
}
