public async Task <ParameterHintingResult> GetParameterDataProviderAsync(Document document, SemanticModel semanticModel, int position, CancellationToken cancellationToken = default(CancellationToken))
{
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
var tokenLeftOfPosition = tree.FindTokenOnLeftOfPosition(position, cancellationToken);
if (tokenLeftOfPosition.IsKind(SyntaxKind.LessThanToken))
{
var startToken = tokenLeftOfPosition.GetPreviousToken();
return(HandleTypeParameterCase(semanticModel, startToken.Parent, cancellationToken));
}
var context = SyntaxContext.Create(workspace, document, semanticModel, position, cancellationToken);
var targetParent = context.TargetToken.Parent;
var node = targetParent.Parent;
// case: identifier<arg1,|
if (node == null)
{
if (context.LeftToken.Kind() == SyntaxKind.CommaToken)
{
targetParent = context.LeftToken.GetPreviousToken().Parent;
node = targetParent.Parent;
if (node.Kind() == SyntaxKind.LessThanExpression)
{
return(HandleTypeParameterCase(semanticModel, ((BinaryExpressionSyntax)node).Left, cancellationToken));
}
}
return(ParameterHintingResult.Empty);
}
if (node.IsKind(SyntaxKind.Argument))
{
node = node.Parent.Parent;
}
switch (node.Kind())
{
case SyntaxKind.Attribute:
return(HandleAttribute(semanticModel, node, cancellationToken));
case SyntaxKind.ThisConstructorInitializer:
case SyntaxKind.BaseConstructorInitializer:
return(HandleConstructorInitializer(semanticModel, node, cancellationToken));
case SyntaxKind.ObjectCreationExpression:
return(HandleObjectCreationExpression(semanticModel, node, cancellationToken));
case SyntaxKind.InvocationExpression:
return(HandleInvocationExpression(semanticModel, (InvocationExpressionSyntax)node, cancellationToken));
case SyntaxKind.ElementAccessExpression:
return(HandleElementAccessExpression(semanticModel, (ElementAccessExpressionSyntax)node, cancellationToken));
}
return(ParameterHintingResult.Empty);
}
public override async Task ProvideCompletionsAsync(CompletionContext context)
{
if (Options.EnableUnimportedSuggestions)
{
_symbolMapping = new Dictionary <string, ISymbol>();
var syntaxContext = await SyntaxContext.Create(context.Document, context.Position, context.CancellationToken)
.ConfigureAwait(false);
var symbols = GetSymbols(syntaxContext);
var completionItemsToAdd = symbols
.Select(symbol => CreateCompletionItemForSymbol(symbol, syntaxContext))
.ToList();
context.AddItems(completionItemsToAdd);
}
}