public static async Task<IEnumerable<ClassifiedSpan>> GetClassifiedSpansAsync(
Document document,
TextSpan textSpan,
CancellationToken cancellationToken = default(CancellationToken))
{
var semanticModel = await document.GetSemanticModelForSpanAsync(textSpan, cancellationToken).ConfigureAwait(false);
return GetClassifiedSpans(semanticModel, textSpan, document.Project.Solution.Workspace, cancellationToken);
}
public override async Task<string> GetHelpTermAsync(Document document, TextSpan span, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var syntaxFacts = document.GetLanguageService<ISyntaxFactsService>();
// For now, find the token under the start of the selection.
var syntaxTree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
var token = syntaxTree.GetTouchingToken(span.Start, cancellationToken, findInsideTrivia: true);
if (IsValid(token, span))
{
var semanticModel = await document.GetSemanticModelForSpanAsync(span, cancellationToken).ConfigureAwait(false);
var result = TryGetText(token, semanticModel, document, cancellationToken, syntaxFacts);
if (string.IsNullOrEmpty(result))
{
var previousToken = token.GetPreviousToken();
if (IsValid(previousToken, span))
{
result = TryGetText(previousToken, semanticModel, document, cancellationToken, syntaxFacts);
}
}
return result;
}
var trivia = root.FindTrivia(span.Start, findInsideTrivia: true);
if (trivia.Span.IntersectsWith(span) && trivia.Kind() == SyntaxKind.PreprocessingMessageTrivia &&
trivia.Token.GetAncestor<RegionDirectiveTriviaSyntax>() != null)
{
return "#region";
}
if (trivia.IsRegularOrDocComment())
{
// just find the first "word" that intersects with our position
var text = await syntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
int start = span.Start;
int end = span.Start;
while (start > 0 && syntaxFacts.IsIdentifierPartCharacter(text[start - 1]))
{
start--;
}
while (end < text.Length - 1 && syntaxFacts.IsIdentifierPartCharacter(text[end]))
{
end++;
}
return text.GetSubText(TextSpan.FromBounds(start, end)).ToString();
}
return string.Empty;
}
public static Task <SemanticModel> GetCSharpSemanticModelForSpanAsync(this Document document, TextSpan span, CancellationToken cancellationToken = default(CancellationToken))
{
return(document.GetSemanticModelForSpanAsync(span, cancellationToken));
}