public void Analyze(SemanticModelAnalysisContext context)
{
var semanticModel = context.SemanticModel;
var syntaxTree = semanticModel.SyntaxTree;
var cancellationToken = context.CancellationToken;
var option = context.Options.GetIdeOptions().ReportInvalidRegexPatterns;
if (!option)
{
return;
}
var detector = RegexLanguageDetector.GetOrCreate(semanticModel.Compilation, _info);
// 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);
}
}
}
}
public void RegisterClassifications(EmbeddedLanguageClassificationContext context)
{
var token = context.SyntaxToken;
if (!_info.IsAnyStringLiteral(token.RawKind))
{
return;
}
if (!context.Options.ColorizeRegexPatterns)
{
return;
}
var semanticModel = context.SemanticModel;
var cancellationToken = context.CancellationToken;
var detector = RegexLanguageDetector.GetOrCreate(semanticModel.Compilation, _info);
var tree = detector.TryParseString(token, semanticModel, cancellationToken);
if (tree == null)
{
return;
}
var visitor = s_visitorPool.Allocate();
try
{
visitor.Context = context;
AddClassifications(tree.Root, visitor, context);
}
finally
{
visitor.Context = default;
s_visitorPool.Free(visitor);
}
}
private void AnalyzeToken(
SemanticModelAnalysisContext context,
RegexLanguageDetector detector,
SyntaxToken token,
CancellationToken cancellationToken)
{
if (_info.IsAnyStringLiteral(token.RawKind))
{
var tree = detector.TryParseString(token, context.SemanticModel, cancellationToken);
if (tree != null)
{
foreach (var diag in tree.Diagnostics)
{
context.ReportDiagnostic(DiagnosticHelper.Create(
Descriptor,
Location.Create(context.SemanticModel.SyntaxTree, diag.Span),
ReportDiagnostic.Warn,
additionalLocations: null,
properties: null,
diag.Message));
}
}
}
}