protected override IDisposable SubscribeCore(IObserver <EventPattern <PropertyChangedEventArgs> > observer)
{
var rootItem = new RootItem((INotifyPropertyChanged)this.sourceReference.Target);
var path = new NotifyingPath(rootItem, this.propertyPath);
var subscription = path.Last()
.ObservePropertyChanged()
.Subscribe(observer.OnNext, observer.OnError);
return(new CompositeDisposable(2)
{
path, subscription
});
}
internal NotifyingPath(RootItem root, IPropertyPath path)
{
this.root = root;
var items = new INotifyingPathItem[path.Count + 1];
items[0] = root;
INotifyingPathItem previous = root;
for (int i = 0; i < path.Count; i++)
{
var item = new NotifyingPathItem(previous, path[i]);
items[i + 1] = item;
previous = item;
}
this.parts = items;
}