internal GlslClassifier(ITextBuffer textBuffer, SyntaxColorParser parser, ILogger logger)
{
if (textBuffer is null)
{
throw new ArgumentNullException(nameof(textBuffer));
}
if (parser is null)
{
throw new ArgumentNullException(nameof(parser));
}
if (logger is null)
{
throw new ArgumentNullException(nameof(logger));
}
var observableSnapshot = Observable.Return(textBuffer.CurrentSnapshot).Concat(
Observable.FromEventPattern <TextContentChangedEventArgs>(h => textBuffer.Changed += h, h => textBuffer.Changed -= h)
.Select(e => e.EventArgs.After));
parser.Changed += _ => UpdateSpans();
void UpdateSpans()
{
#if DEBUG
var time = Stopwatch.StartNew();
#endif
var snapshotSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, 0, textBuffer.CurrentSnapshot.Length);
var spans = parser.CalculateSpans(snapshotSpan);
#if DEBUG
logger.Log($"{time.ElapsedTicks * 1e3f / Stopwatch.Frequency}ms : tokens={spans.Count}");
#endif
this.spans = spans;
ClassificationChanged?.Invoke(this, new ClassificationChangedEventArgs(snapshotSpan));
}
observableSnapshot
.Throttle(TimeSpan.FromSeconds(0.3f))
.Subscribe(_ => UpdateSpans());
//UpdateSpans(new SnapshotSpan(textBuffer.CurrentSnapshot, 0, textBuffer.CurrentSnapshot.Length));
//textBuffer.Changed += (s, a) =>
//{
// // ignore not up-to-date versions
// if (a.After != textBuffer.CurrentSnapshot) return;
// var start = a.Changes.Min(change => Math.Min(change.OldPosition, change.NewPosition));
// var end = a.Changes.Max(change => Math.Max(change.OldEnd, change.NewEnd));
// var length = Math.Min(end - start, textBuffer.CurrentSnapshot.Length);
// var changeSpan = new SnapshotSpan(textBuffer.CurrentSnapshot, start, length);
// var changeText = changeSpan.GetText();
// //if(changeText.Contains('{') || changeText.Contains('}') || changeText.Contains('*') || )
// //UpdateSpans(changeSpan);
// UpdateSpans(new SnapshotSpan(textBuffer.CurrentSnapshot, 0, textBuffer.CurrentSnapshot.Length));
//};
}
public GlslClassifierProvider(IClassificationTypeRegistryService classificationTypeRegistry, ILogger logger, IUserKeywords userKeywords)
{
if (classificationTypeRegistry is null)
{
throw new System.ArgumentNullException(nameof(classificationTypeRegistry));
}
if (userKeywords is null)
{
throw new System.ArgumentNullException(nameof(userKeywords));
}
this.logger = logger ?? throw new System.ArgumentNullException(nameof(logger));
parser = new SyntaxColorParser(classificationTypeRegistry, userKeywords);
}
