public CompletionSource(ITextBuffer textBuffer, NodejsClassifier classifier, IServiceProvider serviceProvider, IGlyphService glyphService)
{
_textBuffer = textBuffer;
_classifier = classifier;
_serviceProvider = serviceProvider;
_glyphService = glyphService;
}
internal static IEnumerator <ClassificationSpan> ReverseClassificationSpanEnumerator(NodejsClassifier classifier, SnapshotPoint startPoint)
{
var startLine = startPoint.GetContainingLine();
int curLine = startLine.LineNumber;
var tokens = classifier.GetClassificationSpans(new SnapshotSpan(startLine.Start, startPoint));
for (; ;)
{
for (int i = tokens.Count - 1; i >= 0; i--)
{
yield return(tokens[i]);
}
// indicate the line break
yield return(null);
curLine--;
if (curLine >= 0)
{
var prevLine = startPoint.Snapshot.GetLineFromLineNumber(curLine);
tokens = classifier.GetClassificationSpans(prevLine.Extent);
}
else
{
break;
}
}
}
