protected override async Task <SignatureHelpItems> GetItemsWorkerAsync(Document document, int position, SignatureHelpTriggerInfo triggerInfo, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
if (!TryGetInitializerExpression(root, position, document.GetLanguageService <ISyntaxFactsService>(), triggerInfo.TriggerReason, cancellationToken, out var initializerExpression))
{
return(null);
}
var addMethods = await CommonSignatureHelpUtilities.GetCollectionInitializerAddMethodsAsync(
document, initializerExpression, cancellationToken).ConfigureAwait(false);
if (addMethods.IsDefaultOrEmpty)
{
return(null);
}
var textSpan = SignatureHelpUtilities.GetSignatureHelpSpan(initializerExpression);
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
return(CreateCollectionInitializerSignatureHelpItems(addMethods.Select(s =>
ConvertMethodGroupMethod(document, s, initializerExpression.OpenBraceToken.SpanStart, semanticModel)).ToList(),
textSpan, GetCurrentArgumentState(root, position, syntaxFacts, textSpan, cancellationToken)));
}
