public async Task <SignatureHelp> GetSignatureHelpAsync(IRIntellisenseContext context)
{
context.EditorBuffer.GetEditorDocument <IREditorDocument>().EditorTree.EnsureTreeReady();
var tcs = new TaskCompletionSource <SignatureHelp>();
var sigs = _signatureEngine.GetSignaturesAsync(context, e => {
using (context.AstReadLock()) {
tcs.TrySetResult(ToSignatureHelp(e.ToList(), context));
}
});
if (sigs != null)
{
using (context.AstReadLock()) {
return(ToSignatureHelp(sigs.ToList(), context));
}
}
return(await tcs.Task);
}
public Task <Hover> GetHoverAsync(IRIntellisenseContext context, CancellationToken ct)
{
var tcs = new TaskCompletionSource <Hover>();
using (context.AstReadLock()) {
var infos = _signatureEngine.GetQuickInfosAsync(context, e => {
var r = !ct.IsCancellationRequested ? ToHover(e.ToList(), context.EditorBuffer) : null;
tcs.TrySetResult(r);
});
return(infos != null?Task.FromResult(ToHover(infos.ToList(), context.EditorBuffer)) : tcs.Task);
}
}
private static IEnumerable <IRFunctionSignatureHelp> MakeSignatures(IFunctionInfo functionInfo, ITrackingTextRange applicableToSpan, IRIntellisenseContext context)
{
var signatures = new List <IRFunctionSignatureHelp>();
if (functionInfo?.Signatures != null)
{
using (context.AstReadLock()) {
signatures.AddRange(functionInfo.Signatures.Select(s => RFunctionSignatureHelp.Create(context, functionInfo, s, applicableToSpan)));
context.Session.Properties["functionInfo"] = functionInfo;
}
}
return(signatures);
}