public void SetEvaluator(string id)
{
if (_evaluatorId == id && _evaluator != null)
{
return;
}
IInteractiveEvaluator eval = null;
try {
eval = string.IsNullOrEmpty(id) ?
null :
_providers.Select(p => p.GetEvaluator(id)).FirstOrDefault(e => e != null);
} catch (NoInterpretersException ex) {
_window.WriteErrorLine(ex.Message);
} catch (MissingInterpreterException ex) {
_window.WriteErrorLine(ex.Message);
} catch (DirectoryNotFoundException ex) {
_window.WriteErrorLine(ex.Message);
} catch (Exception ex) when(!ex.IsCriticalException())
{
_window.WriteErrorLine(ex.ToUnhandledExceptionMessage(GetType()));
}
var oldEval = _evaluator;
_evaluator = null;
if (oldEval != null)
{
DetachWindow(oldEval);
DetachMultipleScopeHandling(oldEval);
oldEval.Dispose();
}
_evaluator = eval;
_evaluatorId = id;
if (eval != null)
{
eval.CurrentWindow = CurrentWindow;
if (eval.CurrentWindow != null)
{
// Otherwise, we'll initialize when the window is set
DoInitializeAsync(eval).DoNotWait();
}
}
UpdateCaption();
PersistEvaluator();
EvaluatorChanged?.Invoke(this, EventArgs.Empty);
AttachMultipleScopeHandling(eval);
}