public void AugmentSignatureHelpSession(ISignatureHelpSession session, IList<ISignature> signatures)
{
var snapshot = _textBuffer.CurrentSnapshot;
var triggerPoint = session.GetTriggerPoint(snapshot);
if (!triggerPoint.HasValue) return;
var triggerLine = triggerPoint.Value.GetContainingLine();
var searchSpan = new SnapshotSpan(triggerLine.Start, triggerPoint.Value);
var analysisResult = ThreadHelper.JoinableTaskFactory.Run(
() => _documentAnalysis.GetAnalysisResultAsync(snapshot));
var triggerBlock = analysisResult.GetBlock(searchSpan.Start);
var triggerToken = triggerBlock.Tokens
.Where(t => ContainsInclusive(searchSpan, t.Span))
.OrderBy(t => t.Span.Start)
.FirstOrDefault(t => t.Type == RadAsmTokenType.FunctionReference || t.Type == RadAsmTokenType.Instruction);
if (triggerToken == null) return;
var applicableSpan = new SnapshotSpan(triggerToken.Span.End, triggerLine.End);
var trackingSpan = snapshot.CreateTrackingSpan(applicableSpan, SpanTrackingMode.EdgeInclusive);
var parameterSpan = new SnapshotSpan(applicableSpan.Start, triggerPoint.Value);
var parameterIdx = parameterSpan.GetCurrentParameter(_signatureConfig.TriggerParameterChar);
switch (triggerToken.Type)
{
case RadAsmTokenType.FunctionReference:
AddFunctionSignature(trackingSpan, triggerToken, parameterIdx, signatures);
break;
case RadAsmTokenType.Instruction:
AddInstructionSignature(snapshot, trackingSpan, triggerToken, parameterIdx, signatures);
break;
}
}
private void ChangeParameterSignatureSession()
{
if (_currentSignatureSession == null)
{
return;
}
if (_currentSignatureSession.Signatures.Count == 0)
{
return;
}
// all signatures have the same applicable span
var trackingSpan = _currentSignatureSession.Signatures[0].ApplicableToSpan;
var currentPosition = _textView.Caret.Position.BufferPosition;
var trackingStart = trackingSpan.GetStartPoint(currentPosition.Snapshot);
// check left border of applicable span, it might be invalid token
if (trackingStart == currentPosition)
{
_currentSignatureSession.Recalculate();
// if there is no applicable token, then current signatureSession will be null
if (_currentSignatureSession == null)
{
return;
}
}
var searchParam = new SnapshotSpan(trackingStart, currentPosition);
var currentParam = searchParam.GetCurrentParameter(_signatureConfig.TriggerParameterChar);
foreach (var signature in _currentSignatureSession.Signatures)
{
if (signature is ISyntaxSignature syntaxSignature)
{
syntaxSignature.SetCurrentParameter(currentParam);
}
}
}
