public Task <SimpleExpansion> GetExpansionsAsync(
string line,
int caretIndex,
CancellationToken token)
{
return(CommandExpansion.GetExpansionsAsync(line, caretIndex, token));
}
private async Task TriggerCompletionAsync()
{
if (CommandExpansion == null)
{
return; // Host CommandExpansion service not available
}
if (IsCompletionSessionActive)
{
_completionSession.Dismiss();
_completionSession = null;
}
string line = WpfConsole.InputLineText;
int caretIndex = CaretPosition - WpfConsole.InputLineStart.Value;
Debug.Assert(caretIndex >= 0);
// Cancel tab expansion if it takes more than 'TabExpansionTimeout' secs (defaults to 3 secs) to get any results
CancellationTokenSource ctSource = new CancellationTokenSource(TabExpansionTimeout * 1000);
SimpleExpansion simpleExpansion = null;
try
{
WpfConsole.Dispatcher.SetExecutingCommand(true);
simpleExpansion = await CommandExpansion.GetExpansionsAsync(line, caretIndex, ctSource.Token);
}
catch (Exception x)
{
// Ignore exception from expansion, but write it to the activity log
ExceptionHelper.WriteErrorToActivityLog(x);
}
finally
{
WpfConsole.Dispatcher.SetExecutingCommand(false);
}
if (simpleExpansion != null &&
simpleExpansion.Expansions != null)
{
IList <string> expansions = simpleExpansion.Expansions;
if (expansions.Count == 1) // Shortcut for 1 TabExpansion candidate
{
ReplaceTabExpansion(simpleExpansion.Start, simpleExpansion.Length, expansions[0]);
}
else if (expansions.Count > 1) // Only start intellisense session for multiple expansion candidates
{
_completionSession = CompletionBroker.CreateCompletionSession(
WpfTextView,
WpfTextView.TextSnapshot.CreateTrackingPoint(CaretPosition.Position, PointTrackingMode.Positive),
true);
_completionSession.Properties.AddProperty("TabExpansion", simpleExpansion);
_completionSession.Dismissed += CompletionSession_Dismissed;
_completionSession.Start();
}
}
}
async Task <SimpleExpansion> TryGetExpansionsAsync(
string line,
int caretIndex,
CancellationToken token)
{
try {
return(await CommandExpansion.GetExpansionsAsync(line, caretIndex, token));
} catch (OperationCanceledException) {
return(null);
} catch (Exception ex) {
LoggingService.LogError("GetExpansionsAsync error.", ex);
return(null);
}
}