async Task <HighlightedLine> ISyntaxHighlighting.GetHighlightedLineAsync(IDocumentLine line, CancellationToken cancellationToken)
{
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
if (!DefaultSourceEditorOptions.Instance.EnableSemanticHighlighting)
{
return(await syntaxMode.GetHighlightedLineAsync(line, cancellationToken));
}
var syntaxLine = await syntaxMode.GetHighlightedLineAsync(line, cancellationToken).ConfigureAwait(false);
if (syntaxLine.Segments.Count == 0)
{
return(syntaxLine);
}
lock (lineSegments) {
var segments = new List <ColoredSegment> (syntaxLine.Segments);
int endOffset = segments [segments.Count - 1].EndOffset;
try {
var tree = lineSegments.FirstOrDefault(t => t.Item1 == line);
int lineOffset = line.Offset;
if (tree == null)
{
tree = Tuple.Create(line, new HighlightingSegmentTree());
tree.Item2.InstallListener(editor.Document);
foreach (var seg2 in semanticHighlighting.GetColoredSegments(new TextSegment(lineOffset, line.Length)))
{
tree.Item2.AddStyle(seg2, seg2.ColorStyleKey);
}
while (lineSegments.Count > MaximumCachedLineSegments)
{
var removed = lineSegments.Dequeue();
try {
removed.Item2.RemoveListener();
} catch (Exception) { }
}
lineSegments.Enqueue(tree);
}
foreach (var treeseg in tree.Item2.GetSegmentsOverlapping(line))
{
var inLineStartOffset = Math.Max(0, treeseg.Offset - lineOffset);
var inLineEndOffset = Math.Min(line.Length, treeseg.EndOffset - lineOffset);
if (inLineEndOffset <= inLineStartOffset)
{
continue;
}
var semanticSegment = new ColoredSegment(inLineStartOffset, inLineEndOffset - inLineStartOffset, syntaxLine.Segments [0].ScopeStack.Push(treeseg.Style));
SyntaxHighlighting.ReplaceSegment(segments, semanticSegment);
}
} catch (Exception e) {
LoggingService.LogError("Error in semantic highlighting: " + e);
return(syntaxLine);
}
return(new HighlightedLine(line, segments));
}
}
async Task <HighlightedLine> ISyntaxHighlighting.GetHighlightedLineAsync(IDocumentLine line, CancellationToken cancellationToken)
{
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
if (!DefaultSourceEditorOptions.Instance.EnableSemanticHighlighting)
{
return(await syntaxMode.GetHighlightedLineAsync(line, cancellationToken));
}
var syntaxLine = await syntaxMode.GetHighlightedLineAsync(line, cancellationToken).ConfigureAwait(false);
if (syntaxLine.Segments.Count == 0)
{
return(syntaxLine);
}
var segments = new List <ColoredSegment> (syntaxLine.Segments);
int endOffset = segments [segments.Count - 1].EndOffset;
try {
// This code should not have any lambda capture linq, as it is a hot loop.
int lineOffset = line.Offset;
foreach (var treeseg in semanticHighlighting.GetColoredSegments(new TextSegment(lineOffset, line.Length)))
{
var inLineStartOffset = Math.Max(0, treeseg.Offset - lineOffset);
var inLineEndOffset = Math.Min(line.Length, treeseg.EndOffset - lineOffset);
if (inLineEndOffset <= inLineStartOffset)
{
continue;
}
var semanticSegment = new ColoredSegment(inLineStartOffset, inLineEndOffset - inLineStartOffset, treeseg.ScopeStack);
SyntaxHighlighting.ReplaceSegment(segments, semanticSegment);
}
} catch (Exception e) {
LoggingService.LogError("Error in semantic highlighting: ", e);
return(syntaxLine);
}
return(new HighlightedLine(line, segments));
}