public override SemanticTokensOrSemanticTokensEdits GetSemanticTokensEdits(RazorCodeDocument codeDocument, string previousResultId)
{
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
var semanticRanges = TagHelperSemanticRangeVisitor.VisitAllNodes(codeDocument);
IReadOnlyList <uint> previousResults = null;
if (previousResultId != null)
{
_semanticTokensCache.TryGetValue(previousResultId, out previousResults);
}
var newTokens = ConvertSemanticRangesToSemanticTokens(semanticRanges, codeDocument);
if (previousResults is null)
{
return(newTokens);
}
var semanticEdits = SemanticTokensEditsDiffer.ComputeSemanticTokensEdits(newTokens, previousResults);
return(semanticEdits);
}
public static IReadOnlyList <SemanticRange> VisitAllNodes(RazorCodeDocument razorCodeDocument, Range range = null)
{
var visitor = new TagHelperSemanticRangeVisitor(razorCodeDocument, range);
visitor.Visit(razorCodeDocument.GetSyntaxTree().Root);
return(visitor._semanticRanges);
}
public override SemanticTokens GetSemanticTokens(RazorCodeDocument codeDocument, Range range)
{
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
var semanticRanges = TagHelperSemanticRangeVisitor.VisitAllNodes(codeDocument, range);
var semanticTokens = ConvertSemanticRangesToSemanticTokens(semanticRanges, codeDocument);
return(semanticTokens);
}
public static IReadOnlyList <SemanticRange> VisitAllNodes(RazorCodeDocument razorCodeDocument, Range?range = null)
{
TextSpan?rangeAsTextSpan = null;
if (range is not null)
{
var sourceText = razorCodeDocument.GetSourceText();
rangeAsTextSpan = range.AsRazorTextSpan(sourceText);
}
var visitor = new TagHelperSemanticRangeVisitor(razorCodeDocument, rangeAsTextSpan);
visitor.Visit(razorCodeDocument.GetSyntaxTree().Root);
return(visitor._semanticRanges);
}
// Internal for benchmarks
internal async Task <SemanticTokens?> GetSemanticTokensAsync(
TextDocumentIdentifier textDocumentIdentifier,
Range range,
DocumentSnapshot documentSnapshot,
int documentVersion,
CancellationToken cancellationToken)
{
var codeDocument = await GetRazorCodeDocumentAsync(documentSnapshot);
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
cancellationToken.ThrowIfCancellationRequested();
var razorSemanticRanges = TagHelperSemanticRangeVisitor.VisitAllNodes(codeDocument, range);
IReadOnlyList <SemanticRange>?csharpSemanticRanges = null;
try
{
csharpSemanticRanges = await GetCSharpSemanticRangesAsync(
codeDocument, textDocumentIdentifier, range, documentVersion, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error thrown while retrieving CSharp semantic range");
}
var combinedSemanticRanges = CombineSemanticRanges(razorSemanticRanges, csharpSemanticRanges);
// We return null when we have an incomplete view of the document.
// Likely CSharp ahead of us in terms of document versions.
// We return null (which to the LSP is a no-op) to prevent flashing of CSharp elements.
if (combinedSemanticRanges is null)
{
_logger.LogWarning("Incomplete view of document. C# may be ahead of us in document versions.");
return(null);
}
var data = ConvertSemanticRangesToSemanticTokensData(combinedSemanticRanges, codeDocument);
var tokens = new SemanticTokens {
Data = data
};
return(tokens);
}
public override SemanticTokensOrSemanticTokensEdits GetSemanticTokensEdits(RazorCodeDocument codeDocument, string previousResultId)
{
if (codeDocument is null)
{
throw new ArgumentNullException(nameof(codeDocument));
}
var semanticRanges = TagHelperSemanticRangeVisitor.VisitAllNodes(codeDocument);
var previousResults = previousResultId is null ? null : _semanticTokensCache.Get(previousResultId);
var newTokens = ConvertSemanticRangesToSemanticTokens(semanticRanges, codeDocument);
if (previousResults is null)
{
return(newTokens);
}
var semanticEdits = SemanticTokensEditsDiffer.ComputeSemanticTokensEdits(newTokens, previousResults);
return(semanticEdits);
}
