private static SemanticTokens ConvertSemanticRangesToSemanticTokens(
IReadOnlyList <SemanticRange> semanticRanges,
RazorCodeDocument razorCodeDocument)
{
if (semanticRanges is null)
{
return(null);
}
SemanticRange previousResult = null;
var data = new List <uint>();
foreach (var result in semanticRanges)
{
var newData = GetData(result, previousResult, razorCodeDocument);
data.AddRange(newData);
previousResult = result;
}
var resultId = Guid.NewGuid();
var tokensResult = new SemanticTokens
{
Data = data.ToArray(),
ResultId = resultId.ToString()
};
_semanticTokensCache.Set(resultId.ToString(), data);
return(tokensResult);
}
// 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);
}
private record SemanticTokensCacheResponse(VersionStamp SemanticVersion, Range Range, SemanticTokens SemanticTokens);
public ProvideSemanticTokensResponse(SemanticTokens result, long?hostDocumentSyncVersion)
{
Result = result;
HostDocumentSyncVersion = hostDocumentSyncVersion;
}