/// <summary>
/// Create a tagger that does error 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 spell check on the view's edit buffer (and multiple views could have that buffer open simultaneously so
// only create one instance of the spell checker.
if ((buffer == textView.TextBuffer) && (typeof(T) == typeof(IErrorTag)))
{
ErrorHighLightChecker errorChecker = buffer.Properties.GetOrCreateSingletonProperty(typeof(ErrorHighLightChecker), () => new ErrorHighLightChecker(this, textView, buffer));
tagger = new ErrorHighLightTagger(errorChecker) as ITagger <T>;
}
return(tagger);
}
internal void AddTagger(ErrorHighLightTagger tagger)
{
_activeTaggers.Add(tagger);
if (_activeTaggers.Count == 1)
{
// First tagger created ... start doing stuff.
_buffer.ChangedLowPriority += this.OnBufferChange;
_provider.AddSpellChecker(this);
this.KickUpdate();
}
}
internal void RemoveTagger(ErrorHighLightTagger 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
// spell checking for that buffer.
_buffer.ChangedLowPriority -= this.OnBufferChange;
_provider.RemoveSpellChecker(this);
_isDisposed = true;
_buffer.Properties.RemoveProperty(typeof(ErrorHighLightChecker));
}
}