public async Task <EmbeddedBraceMatchingResult?> FindBracesAsync(
Document document, int position, CancellationToken cancellationToken)
{
var option = document.Project.Solution.Workspace.Options.GetOption(
RegularExpressionsOptions.HighlightRelatedRegexComponentsUnderCursor, document.Project.Language);
if (!option)
{
return(null);
}
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var token = root.FindToken(position);
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
if (RegexPatternDetector.IsDefinitelyNotPattern(token, syntaxFacts))
{
return(null);
}
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var detector = RegexPatternDetector.TryGetOrCreate(semanticModel, _language);
var tree = detector?.TryParseRegexPattern(token, cancellationToken);
if (tree == null)
{
return(null);
}
return(GetMatchingBraces(tree, position));
}
internal async Task <(RegexTree tree, SyntaxToken token)> TryGetTreeAndTokenAtPositionAsync(
Document document, int position, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var token = root.FindToken(position);
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
if (RegexPatternDetector.IsDefinitelyNotPattern(token, syntaxFacts))
{
return(default);
public override void AddClassifications(
Workspace workspace,
SyntaxToken token,
SemanticModel semanticModel,
ArrayBuilder <ClassifiedSpan> result,
CancellationToken cancellationToken
)
{
if (_info.StringLiteralTokenKind != token.RawKind)
{
return;
}
if (
!workspace.Options.GetOption(
RegularExpressionsOptions.ColorizeRegexPatterns,
semanticModel.Language
)
)
{
return;
}
// Do some quick syntactic checks before doing any complex work.
if (!RegexPatternDetector.IsPossiblyPatternToken(token, _info.SyntaxFacts))
{
return;
}
var detector = RegexPatternDetector.TryGetOrCreate(semanticModel.Compilation, _info);
var tree = detector?.TryParseRegexPattern(token, semanticModel, cancellationToken);
if (tree == null)
{
return;
}
var visitor = s_visitorPool.Allocate();
try
{
visitor.Result = result;
AddClassifications(tree.Root, visitor, result);
}
finally
{
visitor.Result = null;
s_visitorPool.Free(visitor);
}
}
public void Analyze(SemanticModelAnalysisContext context, OptionSet optionSet)
{
var semanticModel = context.SemanticModel;
var syntaxTree = semanticModel.SyntaxTree;
var cancellationToken = context.CancellationToken;
var option = optionSet.GetOption(RegularExpressionsOptions.ReportInvalidRegexPatterns, syntaxTree.Options.Language);
if (!option)
{
return;
}
var detector = RegexPatternDetector.TryGetOrCreate(semanticModel, _language);
if (detector == null)
{
return;
}
// Use an actual stack object so that we don't blow the actual stack through recursion.
var root = syntaxTree.GetRoot(cancellationToken);
var stack = new Stack <SyntaxNode>();
stack.Push(root);
while (stack.Count != 0)
{
cancellationToken.ThrowIfCancellationRequested();
var current = stack.Pop();
foreach (var child in current.ChildNodesAndTokens())
{
if (child.IsNode)
{
stack.Push(child.AsNode());
}
else
{
AnalyzeToken(context, detector, child.AsToken(), cancellationToken);
}
}
}
}
private void AnalyzeToken(
SemanticModelAnalysisContext context, RegexPatternDetector detector,
SyntaxToken token, CancellationToken cancellationToken)
{
if (token.RawKind == _language.StringLiteralKind)
{
var tree = detector.TryParseRegexPattern(token, cancellationToken);
if (tree != null)
{
foreach (var diag in tree.Diagnostics)
{
context.ReportDiagnostic(Diagnostic.Create(
_descriptor,
Location.Create(context.SemanticModel.SyntaxTree, diag.Span),
diag.Message));
}
}
}
}
public void AddClassifications(
Workspace workspace, SyntaxToken token, SemanticModel semanticModel,
ArrayBuilder <ClassifiedSpan> result, CancellationToken cancellationToken)
{
if (!workspace.Options.GetOption(RegularExpressionsOptions.ColorizeRegexPatterns, semanticModel.Language))
{
return;
}
// Do some quick syntactic checks before doing any complex work.
if (RegexPatternDetector.IsDefinitelyNotPattern(token, _language.SyntaxFacts))
{
return;
}
var detector = RegexPatternDetector.TryGetOrCreate(semanticModel, _language);
var tree = detector?.TryParseRegexPattern(token, cancellationToken);
if (tree == null)
{
return;
}
var visitor = _visitorPool.Allocate();
try
{
visitor.Result = result;
AddClassifications(tree.Root, visitor, result);
}
finally
{
visitor.Result = null;
_visitorPool.Free(visitor);
}
}