/// <summary>
/// Called when the execution of the decorated CoTask has completed.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="innerCoTask">The decorated CoTask.</param>
/// <param name="args">The <see cref="CoTaskCompletedEventArgs" /> instance containing the event data.</param>
protected override void OnInnerResultCompleted(CoroutineExecutionContext context, ICoTask innerCoTask,
CoTaskCompletedEventArgs args)
{
if (args.Error is object || !args.WasCancelled)
{
OnCompleted(new CoTaskCompletedEventArgs(args.Error, false));
}
else
{
Continue(context);
}
}
/// <summary>
/// Called when the execution of the decorated CoTask has completed.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="innerCoTask">The decorated coTask.</param>
/// <param name="args">The <see cref="Caliburn.Coroutines.CoTaskCompletedEventArgs" /> instance containing the event data.</param>
protected override void OnInnerResultCompleted(CoroutineExecutionContext context, ICoTask innerCoTask,
CoTaskCompletedEventArgs args)
{
var error = args.Error as TException;
if (error is null)
{
OnCompleted(args);
}
else
{
Rescue(context, error);
}
}
private void ChildCompleted(object sender, CoTaskCompletedEventArgs args)
{
var previous = sender as ICoTask;
if (previous is object)
{
previous.Completed -= ChildCompleted;
}
if (args.Error is object || args.WasCancelled)
{
OnComplete(args.Error, args.WasCancelled);
return;
}
bool moveNextSucceeded;
try
{
moveNextSucceeded = _enumerator.MoveNext();
}
catch (Exception ex)
{
OnComplete(ex, false);
return;
}
if (moveNextSucceeded)
{
try
{
var next = _enumerator.Current;
next.Completed += ChildCompleted;
next.BeginExecute(_context);
}
catch (Exception ex)
{
OnComplete(ex, false);
}
}
else
{
OnComplete(null, false);
}
}
private void ContinueCompleted(object sender, CoTaskCompletedEventArgs args)
{
((ICoTask)sender).Completed -= ContinueCompleted;
OnCompleted(new CoTaskCompletedEventArgs(args.Error, args.Error is null));
}
/// <summary>
/// Raises the <see cref="Completed" /> event.
/// </summary>
/// <param name="args">The <see cref="CoTaskCompletedEventArgs"/> instance containing the event data.</param>
protected void OnCompleted(CoTaskCompletedEventArgs args)
{
Completed?.Invoke(this, args);
}
/// <summary>
/// Called when the execution of the decorated CoTask has completed.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="innerCoTask">The decorated CoTask.</param>
/// <param name="args">The <see cref="CoTaskCompletedEventArgs"/> instance containing the event data.</param>
protected abstract void OnInnerResultCompleted(CoroutineExecutionContext context, ICoTask innerCoTask,
CoTaskCompletedEventArgs args);
private void InnerCoTaskCompleted(object sender, CoTaskCompletedEventArgs args)
{
_innerCoTask.Completed -= InnerCoTaskCompleted;
OnInnerResultCompleted(_context, _innerCoTask, args);
_context = null;
}
private void RescueCompleted(object sender, CoTaskCompletedEventArgs args)
{
((ICoTask)sender).Completed -= RescueCompleted;
OnCompleted(new CoTaskCompletedEventArgs(args.Error,
args.Error is null && (args.WasCancelled || _cancelCoTask)));
}