public static TextBufferStateTracker GetTrackerForTextBuffer(ITextBuffer buffer)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
TextBufferStateTracker tracker;
buffer.Properties.TryGetProperty(typeof(TextBufferStateTracker), out tracker);
if (tracker != null)
{
return(tracker);
}
tracker = new TextBufferStateTracker(buffer);
buffer.Properties.AddProperty(typeof(TextBufferStateTracker), tracker);
return(tracker);
}
public IList <ClassificationSpan> GetClassificationSpans(SnapshotSpan span) // from IClassifier
{
ThreadHelper.ThrowIfNotOnUIThread();
_snapshot = span.Snapshot;
var appSettings = ProbeEnvironment.CurrentAppSettings;
var fileName = VsTextUtil.TryGetDocumentFileName(span.Snapshot.TextBuffer);
var tracker = TextBufferStateTracker.GetTrackerForTextBuffer(span.Snapshot.TextBuffer);
var spans = new List <ClassificationSpan>();
var state = tracker.GetStateForPosition(span.Start.Position, span.Snapshot, fileName, appSettings);
var tokenInfo = new ProbeClassifierScanner.TokenInfo();
var fileStore = CodeModel.FileStore.GetOrCreateForTextBuffer(span.Snapshot.TextBuffer);
if (fileStore == null)
{
return(new List <ClassificationSpan>());
}
var model = fileStore.GetMostRecentModel(appSettings, fileName, span.Snapshot, "GetClassificationSpans");
_scanner.SetSource(span.GetText(), span.Start.Position, span.Snapshot, model);
var disableDeadCode = ProbeToolsPackage.Instance.EditorOptions.DisableDeadCode;
DisabledSectionTracker disabledSectionTracker = null;
if (disableDeadCode)
{
disabledSectionTracker = new DisabledSectionTracker(model.DisabledSections);
if (disabledSectionTracker.SetOffset(_scanner.PositionOffset))
{
state |= State.Disabled;
}
else
{
state &= ~State.Disabled;
}
}
else
{
state &= ~State.Disabled;
}
while (_scanner.ScanTokenAndProvideInfoAboutIt(tokenInfo, ref state))
{
var classificationType = GetClassificationType(tokenInfo.Type);
if (classificationType != null)
{
spans.Add(new ClassificationSpan(new SnapshotSpan(_snapshot, new Span(span.Start.Position + tokenInfo.StartIndex, tokenInfo.Length)), classificationType));
}
if (disableDeadCode)
{
if (disabledSectionTracker.Advance(_scanner.PositionOffset + _scanner.Position))
{
state |= State.Disabled;
}
else
{
state &= ~State.Disabled;
}
}
else
{
state &= ~State.Disabled;
}
}
return(spans);
}