public IEnumerable <ITagSpan <IOutliningRegionTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
//yield break;
if (spans.Count == 0)
{
yield break;
}
// Try to retrieve an already parsed list of Tags
XSharpClassifier xsClassifier = null;
if (buffer.Properties.ContainsProperty(typeof(XSharpClassifier)))
{
xsClassifier = buffer.Properties[typeof(XSharpClassifier)] as XSharpClassifier;
}
if (xsClassifier != null)
{
//
ITextSnapshot snapshot = xsClassifier.Snapshot;
SnapshotSpan Span = new SnapshotSpan(snapshot, 0, snapshot.Length);
var classifications = xsClassifier.GetRegionTags();
SnapshotSpan fullSpan = new SnapshotSpan(spans[0].Start, spans[spans.Count - 1].End).TranslateTo(snapshot, SpanTrackingMode.EdgeExclusive);
int startLineNumber = fullSpan.Start.GetContainingLine().LineNumber;
int endLineNumber = fullSpan.End.GetContainingLine().LineNumber;
//
Stack <ClassificationSpan> startStack = new Stack <ClassificationSpan>();
// convert classifications to an array so there will be no crash when the classifications are changed
// in another thread.
// Now, let's have a look at all the Classifications we have in the document
foreach (var tag in classifications)
{
// Is it a Region ?
if (tag.ClassificationType.IsOfType(this.xsharpRegionStartType.Classification))
{
startStack.Push(tag);
}
else if (tag.ClassificationType.IsOfType(this.xsharpRegionStopType.Classification) && (startStack.Count > 0))
{
//
var startTag = startStack.Pop();
var startLine = startTag.Span.Start.GetContainingLine();
var endLine = tag.Span.End.GetContainingLine();
//
if (startTag.Span.Start < tag.Span.End &&
startLine.LineNumber <= endLineNumber &&
endLine.LineNumber >= startLineNumber)
{
SnapshotSpan sSpan;
try
{
sSpan = new SnapshotSpan(startLine.Start, endLine.End);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Incorrect span " + e.Message);
sSpan = new SnapshotSpan(startLine.Start, startLine.Start);
}
hoverText = sSpan.GetText();
if (hoverText.Length > 1024)
{
hoverText = hoverText.Substring(0, 1024) + "\r\n......";
}
//
sSpan = new SnapshotSpan(startLine.Start, startLine.End);
////the region starts at the beginning of the entity, and goes until the *end* of the line that ends.
yield return(new TagSpan <IOutliningRegionTag>(
new SnapshotSpan(startLine.End, endLine.End),
new OutliningRegionTag(false, true, ellipsis, hoverText)));
}
}
}
}
else
{
yield break;
}
}
