public IEnumerable <IMappingTagSpan <T> > GetTags(NormalizedSnapshotSpanCollection snapshotSpans, CancellationToken cancellationToken)
{
if (snapshotSpans == null)
{
throw new ArgumentNullException(nameof(snapshotSpans));
}
if (snapshotSpans.Count == 0)
{
yield break;
}
var snapshotSpansSnapshot = snapshotSpans[0].Snapshot;
foreach (var tagger in taggers)
{
var syncTagger = tagger as ISynchronousTagger <T>;
var tags = syncTagger != null?syncTagger.GetTags(snapshotSpans, cancellationToken) : tagger.GetTags(snapshotSpans);
cancellationToken.ThrowIfCancellationRequested();
foreach (var tagSpan in tags)
{
var newSpan = tagSpan.Span.TranslateTo(snapshotSpansSnapshot, SpanTrackingMode.EdgeExclusive);
if (snapshotSpans.IntersectsWith(newSpan))
{
yield return(new MappingTagSpan <T>(BufferGraph.CreateMappingSpan(tagSpan.Span, SpanTrackingMode.EdgeExclusive), tagSpan.Tag));
}
}
}
}
void RaiseTagsChanged(SnapshotSpan span, object sender = null)
{
if (IsDisposed)
{
return;
}
IMappingSpan mappingSpan = null;
TagsChanged?.Invoke(sender ?? this, new TagsChangedEventArgs(mappingSpan = BufferGraph.CreateMappingSpan(span, SpanTrackingMode.EdgeExclusive)));
if (BatchedTagsChanged != null)
{
lock (lockObj) {
batchedTagsChangedList.Add(mappingSpan ?? BufferGraph.CreateMappingSpan(span, SpanTrackingMode.EdgeExclusive));
if (batchedTagsChangedList.Count == 1)
{
dispatcher.BeginInvoke(new Action(RaiseOnUIThread), DispatcherPriority.Normal);
}
}
}
}
public IEnumerable <IMappingTagSpan <T> > GetTags(NormalizedSnapshotSpanCollection snapshotSpans)
{
if (snapshotSpans == null)
{
throw new ArgumentNullException(nameof(snapshotSpans));
}
if (snapshotSpans.Count == 0)
{
yield break;
}
var snapshotSpansSnapshot = snapshotSpans[0].Snapshot;
foreach (var tagger in taggers)
{
foreach (var tagSpan in tagger.GetTags(snapshotSpans))
{
var newSpan = tagSpan.Span.TranslateTo(snapshotSpansSnapshot, SpanTrackingMode.EdgeExclusive);
if (snapshotSpans.IntersectsWith(newSpan))
{
yield return(new MappingTagSpan <T>(BufferGraph.CreateMappingSpan(tagSpan.Span, SpanTrackingMode.EdgeExclusive), tagSpan.Tag));
}
}
}
}
