private bool TryClassify(IEmbeddedLanguageClassifier classifier, EmbeddedLanguageClassificationContext context)
{
var count = _result.Count;
classifier.RegisterClassifications(context);
return(_result.Count != count);
}
public void RegisterClassifications(EmbeddedLanguageClassificationContext context)
{
var token = context.SyntaxToken;
if (!_supportedKinds.Contains(token.RawKind))
{
return;
}
var virtualChars = _info.VirtualCharService.TryConvertToVirtualChars(token);
if (virtualChars.IsDefaultOrEmpty)
{
return;
}
// Can avoid any work if we got the same number of virtual characters back as characters in the string. In
// that case, there are clearly no escaped characters.
if (virtualChars.Length == token.Text.Length)
{
return;
}
foreach (var vc in virtualChars)
{
if (vc.Span.Length > 1)
{
context.AddClassification(ClassificationTypeNames.StringEscapeCharacter, vc.Span);
}
}
}
private void ClassifyToken(SyntaxToken token)
{
if (token.Span.IntersectsWith(_textSpan) && _owner.SyntaxTokenKinds.Contains(token.RawKind))
{
var context = new EmbeddedLanguageClassificationContext(
_project, _semanticModel, token, _options, _owner.Info.VirtualCharService, _result, _cancellationToken);
var classifiers = _owner.GetServices(_semanticModel, token, _cancellationToken);
foreach (var classifier in classifiers)
{
// If this classifier added values then need to check the other ones.
if (TryClassify(classifier.Value, context))
{
return;
}
}
// If not other classifier classified this, then give the fallback classifier a chance to classify basic language escapes.
TryClassify(_owner._fallbackClassifier, context);
}
}