internal void RemoveTagger(DevSkimTagger tagger)
{
_activeTaggers.Remove(tagger);
if (_activeTaggers.Count == 0)
{
// Last tagger was disposed of. This is means there are no longer any open views on the buffer so we can safely shut down
// security checking for that buffer.
_buffer.ChangedLowPriority -= this.OnBufferChange;
_provider.RemoveSkimChecker(this);
_isDisposed = true;
_buffer.Properties.RemoveProperty(typeof(SkimChecker));
IDisposable classifierDispose = _classifier as IDisposable;
if (classifierDispose != null)
{
classifierDispose.Dispose();
}
_classifier = null;
}
}
/// <summary>
/// Create a tagger that does security checking on the view/buffer combination.
/// </summary>
public ITagger <T> CreateTagger <T>(ITextView textView, ITextBuffer buffer) where T : ITag
{
ITagger <T> tagger = null;
// Only attempt to security check on the view's edit buffer (and multiple views could have that buffer open simultaneously so
// only create one instance of the security checker.
if ((buffer == textView.TextBuffer) && (typeof(T) == typeof(IErrorTag)))
{
var skimChecker = buffer.Properties.GetOrCreateSingletonProperty(typeof(SkimChecker), () => new SkimChecker(this, textView, buffer));
// This is a thin wrapper around the SkimChecker that can be disposed of without shutting down the SkimChecker
// (unless it was the last tagger on the skim checker).
tagger = new DevSkimTagger(skimChecker) as ITagger <T>;
}
return(tagger);
}
internal void AddTagger(DevSkimTagger tagger)
{
_activeTaggers.Add(tagger);
if (_activeTaggers.Count == 1)
{
// First tagger created ... start doing stuff.
_classifier = _provider.ClassifierAggregatorService.GetClassifier(_buffer);
_buffer.ChangedLowPriority += this.OnBufferChange;
_dirtySpans = new NormalizedSnapshotSpanCollection(new SnapshotSpan(_currentSnapshot, 0, _currentSnapshot.Length));
_provider.AddSkimChecker(this);
this.KickUpdate();
}
}