/// <summary>
/// Triggers Statement completion when appropriate keys are pressed ('[', '{', '\', '(')
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnKeyDown(object sender, KeyEventArgs e)
{
// Make sure that this event happened on the same text view to which we're attached.
ITextView textView = sender as ITextView;
if (this.subjectTextView != textView)
{
return;
}
// Find the completion provider associated with the pressed key
RegexCompletionProvider completionProvider = GetCompletionProvider(e);
if (completionProvider != null)
{
if (activeSession != null)
{
activeSession.Dismiss();
}
// determine which subject buffer is affected by looking at the caret position
SnapshotPoint?caretPoint = textView.Caret.Position.Point.GetPoint
(textBuffer => (subjectBuffers.Contains(textBuffer)),
PositionAffinity.Predecessor);
if (caretPoint.HasValue)
{
// the invocation occurred in a subject buffer of interest to us
ICompletionBroker broker = completionBroker;
ITrackingPoint triggerPoint = caretPoint.Value.Snapshot.CreateTrackingPoint(caretPoint.Value.Position, PointTrackingMode.Positive);
// Create a completion session
activeSession = broker.CreateCompletionSession(textView, triggerPoint, true);
// Set the completion provider that will be used by the completion source
activeSession.Properties.AddProperty(RegexCompletionProvider.CompletionProviderSessionKey, completionProvider);
// Attach to the session events
activeSession.Dismissed += new System.EventHandler(OnActiveSessionDismissed);
activeSession.Committed += new System.EventHandler(OnActiveSessionCommitted);
this.subjectTextView.Properties.GetProperty <TextViewEventManager>(TextViewEventManager.Key).OnIntellisenseSessionStart(new EventArgs());
// Start the completion session. The intellisense will be triggered.
activeSession.Start();
}
}
else if (e.Key == Key.Down && activeSession != null)
{
SelectNextCompletion();
e.Handled = true;
}
else if (e.Key == Key.Up && activeSession != null)
{
SelectPreviousCompletion();
e.Handled = true;
}
}
void ICompletionSource.AugmentCompletionSession(ICompletionSession session, IList <CompletionSet> completionSets)
{
int triggerPointPosition = session.GetTriggerPoint(session.TextView.TextBuffer).GetPosition(session.TextView.TextSnapshot);
ITrackingSpan trackingSpan = session.TextView.TextSnapshot.CreateTrackingSpan(
triggerPointPosition, 0, SpanTrackingMode.EdgeInclusive);
RegexCompletionProvider completionProvider = session.Properties[RegexCompletionProvider.CompletionProviderSessionKey] as RegexCompletionProvider;
if (completionProvider != null)
{
// TODO: RC1 Investigate what the moniker parameter is
completionSets.Add(new CompletionSet("regex", CompletionSetName, trackingSpan, completionProvider.GetCompletions(session), null));
}
}
