public Optional <ListChange <T> > Insert <T>(int index, T item, bool predicateTrue)
{
var toIndex = _items.Sum(index);
_items = _items.Insert(index, predicateTrue ? 1 : 0);
return(predicateTrue
? ListChange.Insert(toIndex, item)
: Optional.None <ListChange <T> >());
}
IDisposable SubscribeInner(IObservable <T> obs, IndexTrackerList <SingleAssignmentDisposable> .IndexedItem indexedItem)
{
return(obs.Subscribe(
Observer.Create <T>(
onNext: item =>
{
lock (_gate)
foreach (var currentIndex in indexedItem.Index)
{
foreach (var change in _changeMapper.Replace(currentIndex, item, true))
{
_observer.OnNext(change);
}
}
},
onError: OnError,
onCompleted: () =>
{
lock (_gate)
{
foreach (var currentIndex in indexedItem.Index)
{
_innerSubscriptions[currentIndex].Dispose();
_innerCompleted = _innerCompleted.ReplaceAt(currentIndex, true);
if (_outerCompleted && _innerCompleted.Sum())
{
Disposable.Combine(_innerSubscriptions).Dispose();
_innerSubscriptions.Clear();
_observer.OnCompleted();
}
}
}
})));
}
public void OnCompleted()
{
lock (_gate)
{
_outerCompleted = true;
if (_innerCompleted.Sum())
{
Disposable.Combine(_innerSubscriptions).Dispose();
_innerSubscriptions.Clear();
_observer.OnCompleted();
}
}
}
