private RenderNode RegisterItem(object instance, RenderNode dependent)
{
if (instance == null)
return null;
RenderNode result;
if (!_items.TryGetValue(instance, out result))
{
IEnumerable<object> elements;
switch (_strategy.ClassifyInstance(instance, out elements))
{
case InstanceType.Object:
result = new ObjectOrValueNode(instance, _nextId++, false);
break;
case InstanceType.Value:
result = new ObjectOrValueNode(instance, _nextId++, true);
break;
case InstanceType.Link:
result = new LinkNode(instance, _nextId++);
break;
case InstanceType.Collection:
var collection = new CollectionNode(instance, _nextId++);
result = collection;
collection.Elements.AddRange(elements.Select(x => RegisterItem(x, result)));
break;
}
if (result != null)
{
_items[instance] = result;
_newItems.Enqueue(result);
}
}
if (result != null && dependent != null) // TODO: consider requiring non null
{
result.Dependents.Add(dependent);
dependent.Dependencies.Add(result);
}
return result;
}
protected string RenderValue(CollectionNode node)
{
var status = _renderSchedule.GetStatus(node);
status.HasEmitted = true;
return string.Format("ko.observableArray([{0}])", string.Join(",", node.Elements.Select(Render)));
}
