protected override Task <IEnumerable <CompletionData> > GetItemsWorkerAsync(CompletionResult completionResult, CompletionEngine engine, CompletionContext completionContext, CompletionTriggerInfo info, SyntaxContext ctx, CancellationToken cancellationToken)
{
var document = completionContext.Document;
var position = completionContext.Position;
var semanticModel = ctx.SemanticModel;
if (info.TriggerCharacter == '\\')
{
if (ctx.TargetToken.Parent != null && ctx.TargetToken.Parent.Parent != null &&
ctx.TargetToken.Parent.Parent.IsKind(SyntaxKind.Argument))
{
var argument = ctx.TargetToken.Parent.Parent as ArgumentSyntax;
var symbolInfo = semanticModel.GetSymbolInfo(ctx.TargetToken.Parent.Parent.Parent.Parent);
if (symbolInfo.Symbol == null)
{
return(TaskUtil.EmptyEnumerable <CompletionData> ());
}
if (SemanticHighlightingVisitor <int> .IsRegexMatchMethod(symbolInfo))
{
if (((ArgumentListSyntax)argument.Parent).Arguments [1] != argument)
{
return(TaskUtil.EmptyEnumerable <CompletionData> ());
}
completionResult.AutoSelect = false;
return(Task.FromResult(GetFormatCompletionData(engine, argument.Expression.ToString() [0] == '@')));
}
if (SemanticHighlightingVisitor <int> .IsRegexConstructor(symbolInfo))
{
if (((ArgumentListSyntax)argument.Parent).Arguments [0] != argument)
{
return(TaskUtil.EmptyEnumerable <CompletionData> ());
}
completionResult.AutoSelect = false;
return(Task.FromResult(GetFormatCompletionData(engine, argument.Expression.ToString() [0] == '@')));
}
}
}
else
{
var ma = ctx.TargetToken.Parent as MemberAccessExpressionSyntax;
if (ma != null)
{
var symbolInfo = semanticModel.GetSymbolInfo(ma.Expression);
var typeInfo = semanticModel.GetTypeInfo(ma.Expression);
var type = typeInfo.Type;
if (type != null && type.Name == "Match" && type.ContainingNamespace.GetFullName() == "System.Text.RegularExpressions")
{
var items = new List <CompletionData>();
foreach (var grp in GetGroups(ctx, symbolInfo.Symbol))
{
items.Add(engine.Factory.CreateGenericData(this, "Groups[\"" + grp + "\"]", GenericDataType.Undefined));
}
return(Task.FromResult((IEnumerable <CompletionData>)items));
}
}
}
return(TaskUtil.EmptyEnumerable <CompletionData> ());
}