public ISignatureHelpSource TryCreateSignatureHelpSource(ITextBuffer textBuffer)
{
if (textBuffer == null)
{
throw new ArgumentNullException(nameof(textBuffer));
}
var document = _documentFactory.GetOrCreateDocument(textBuffer);
if (document == null)
{
return(null);
}
var asmType = textBuffer.CurrentSnapshot.GetAsmType();
var config = SignatureConfig.GetSignature(asmType);
return(config == null ? null : new SignatureHelpSource(document.DocumentAnalysis, _instructionListManager, textBuffer, config));
}
