public ITagger <T> CreateTagger <T>(ITextView textView, ITextBuffer buffer) where T : ITag
{
if (textView == null)
{
throw new ArgumentNullException(nameof(textView));
}
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (buffer != textView.TextBuffer)
{
return(null);
}
if (!taggableBufferIndicator.IsTaggable(buffer))
{
return(null);
}
var tagger = Create(textView as IWpfTextView);
return(tagger as ITagger <T>);
}
public ITagger <T> CreateTagger <T>(ITextBuffer buffer) where T : ITag
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (!taggableBufferIndicator.IsTaggable(buffer))
{
return(null);
}
// Tip when debugging/developing: a buffer tagger won't be created until there is something that can consume the tags. In our case,
// it means until one of our view tagger providers is created, because they create a tag aggregator that consumes the those
// buffer tags.
var tagger = Create(buffer);
return(tagger as ITagger <T>);
}
public ITagger <T> CreateTagger <T>(ITextBuffer buffer) where T : ITag
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (!taggableBufferIndicator.IsTaggable(buffer))
{
return(null);
}
// We only want one location tagger per buffer and we don't want it be disposed until
// it is not being used by any tag aggregators, so we're wrapping it in a SingletonDisposableTaggerManager
var taggerManager = buffer.Properties.GetOrCreateSingletonProperty(typeof(SingletonDisposableTaggerManager <IIssueLocationTag>),
() => new SingletonDisposableTaggerManager <IIssueLocationTag>(InternalCreateTagger));
var tagger = taggerManager.CreateTagger(buffer);
return(tagger as ITagger <T>);
}