public void AugmentSignatureHelpSession(ISignatureHelpSession session, IList <ISignature> signatures)
{
SnapshotPoint?point = session.GetTriggerPoint(_buffer.CurrentSnapshot);
if (!point.HasValue)
{
return;
}
CssEditorDocument document = CssEditorDocument.FromTextBuffer(_buffer);
ParseItem item = document.StyleSheet.ItemBeforePosition(point.Value.Position);
if (item == null)
{
return;
}
Declaration dec = item.FindType <Declaration>();
if (dec == null || dec.PropertyName == null || dec.Colon == null)
{
return;
}
int length = dec.Length - (dec.Colon.Start - dec.Start);
var span = _buffer.CurrentSnapshot.CreateTrackingSpan(dec.Colon.Start, length, SpanTrackingMode.EdgeNegative);
ValueOrderFactory.AddSignatures method = ValueOrderFactory.GetMethod(dec);
if (method != null)
{
signatures.Clear();
method(session, signatures, dec, span);
Dispatcher.CurrentDispatcher.BeginInvoke(
new Action(() =>
{
if (session == null || session.Properties == null)
{
return;
}
session.Properties.AddProperty("dec", dec);
session.Match();
}),
DispatcherPriority.Normal, null);
}
}
public ISignature GetBestMatch(ISignatureHelpSession session)
{
int number = 0;
if (session.Properties.ContainsProperty("dec"))
{
Declaration dec = session.Properties["dec"] as Declaration;
string methodName = ValueOrderFactory.GetMethod(dec).Method.Name;
if (dec.Values.Count > 0 && (methodName == "Margins" || methodName == "Corners"))
{
number = 4 - dec.Values.Count;
}
}
return((session.Signatures != null && session.Signatures.Count > number && number > -1)
? session.Signatures[number]
: null);
}