private bool TryFindInvocation(
TextSpan span,
SyntaxNode root,
SemanticModel semanticModel,
ImmutableArray <IMethodSymbol> formatMethods,
ISyntaxFactsService syntaxFactsService,
CancellationToken cancellationToken,
out TInvocationExpressionSyntax invocation,
out ISymbol invocationSymbol)
{
invocationSymbol = null;
invocation = root.FindNode(span, getInnermostNodeForTie: true)?.FirstAncestorOrSelf <TInvocationExpressionSyntax>();
while (invocation != null)
{
var arguments = syntaxFactsService.GetArgumentsForInvocationExpression(invocation);
if (arguments.Count >= 2)
{
var firstArgumentExpression = syntaxFactsService.GetExpressionOfArgument(arguments[0]) as TLiteralExpressionSyntax;
if (firstArgumentExpression != null && syntaxFactsService.IsStringLiteral(firstArgumentExpression.GetFirstToken()))
{
invocationSymbol = semanticModel.GetSymbolInfo(invocation, cancellationToken).Symbol;
if (formatMethods.Contains(invocationSymbol))
{
break;
}
}
}
invocation = invocation.Parent?.FirstAncestorOrSelf <TInvocationExpressionSyntax>();
}
return(invocation != null);
}
private async Task <Document> CreateInterpolatedString(
TInvocationExpressionSyntax invocation,
Document document,
ISyntaxFactsService syntaxFactsService,
CancellationToken cancellationToken)
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var arguments = syntaxFactsService.GetArgumentsForInvocationExpression(invocation);
var literalExpression = syntaxFactsService.GetExpressionOfArgument(arguments[0]) as TLiteralExpressionSyntax;
var text = literalExpression.GetFirstToken().ToString();
var syntaxGenerator = document.Project.LanguageServices.GetService <SyntaxGenerator>();
var expandedArguments = GetExpandedArguments(semanticModel, arguments, syntaxGenerator, syntaxFactsService);
var interpolatedString = GetInterpolatedString(text);
var newInterpolatedString = VisitArguments(expandedArguments, interpolatedString, syntaxFactsService);
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var newRoot = root.ReplaceNode(invocation, newInterpolatedString.WithTriviaFrom(invocation));
return(document.WithSyntaxRoot(newRoot));
}
