/// <summary> /// Trigger completion. /// </summary> private void TriggerCompletion() { // the caret must be in a non-projection location var caretPoint = textView.Caret.Position.Point.GetPoint(textBuffer => (!textBuffer.ContentType.IsOfType("projection")), PositionAffinity.Predecessor); if (!caretPoint.HasValue) { return; } var cp = (SnapshotPoint)caretPoint; var position = cp.Position; // check for "//" before the current cursor position in this line var line = ((SnapshotPoint)caretPoint).Snapshot.GetLineFromPosition(((SnapshotPoint)caretPoint).Position); // get the text of this line var text = line.GetText(); // get only the text portion which is left of the actual position text = text.Substring(0, position - line.Start.Position); // if there is a comment starting, don't do auto completion if (text.IndexOf("//", StringComparison.CurrentCultureIgnoreCase) != -1) { return; } var lex = new Lexer(cp.Snapshot.GetText()); lex.AnalyzeForCommentsOnly(); var res = lex.Tokens.FirstOrDefault(x => x.Position < cp.Position && x.Position + x.Length >= cp.Position); if (res != null) { return; } session = provider.CompletionBroker.CreateCompletionSession(textView, caretPoint.Value.Snapshot.CreateTrackingPoint(caretPoint.Value.Position, PointTrackingMode.Positive), true); // subscribe to the Dismissed event on the session session.Dismissed += OnSessionDismissed; session.Start(); }