CommandMeta(TypeMeta owner, MethodInfo method, MemberMeta condition)
: base(owner, method.Name, typeof(ICommand))
{
Method = method;
Condition = condition;
HasParameter = method.GetParameters().Any();
}
CommandMeta(TypeMeta owner, MethodInfo method, MemberMeta condition)
: base(owner, method.Name, typeof(ICommand))
{
Method = method;
Condition = condition;
HasParameter = method.GetParameters().Any();
}
internal static MemberSlot Create(ViewProxy proxy, MemberMeta member)
{
if (member.IsCollection)
return new CollectionSlot(proxy, member);
else
return new AtomSlot(proxy, member);
}
internal static MemberSlot Create(ViewProxy proxy, MemberMeta member)
{
if (member.IsCollection)
{
if (member.IsObservableCollection)
{
return(new PassThroughSlot(proxy, member));
}
else if (member.IsList)
{
return(new ListSlot(proxy, member));
}
else
{
#if NETFRAMEWORK
if (BindingListSlot.AppliesTo(member))
{
return(new BindingListSlot(proxy, member));
}
else
{
return(new CollectionSlot(proxy, member));
}
#else
return(new CollectionSlot(proxy, member));
#endif
}
}
else
{
return(new AtomSlot(proxy, member));
}
}
internal static MemberMeta Intercept(MemberMeta member)
{
var unwrapped = UnwrapObservableType(member.MemberType, typeof(Observable<>));
if (unwrapped != null)
return new ObservableMeta(member, unwrapped);
else
return member;
}
private static Type GetElementType(MemberMeta member)
{
Type propType = member.MemberType;
Type elemType = (propType.GetInterfacesPortable().Concat(new Type[] { propType })
.FirstOrDefault(i => i.IsGenericTypePortable() && i.GetGenericTypeDefinition() == typeof(IEnumerable <>)) ?? typeof(IEnumerable <object>))
.GetGenericArgumentsPortable().First();
return(elemType);
}
internal static MemberSlot Create(ViewProxy proxy, MemberMeta member)
{
if (member.IsCollection)
{
return(new CollectionSlot(proxy, member));
}
else
{
return(new AtomSlot(proxy, member));
}
}
public ProxyPropertyDescriptor(ProxyTypeDescriptor owner, MemberMeta meta)
: base(meta.Name, null)
{
_owner = owner;
_meta = meta;
if (!meta.IsViewModel)
_exposedType = meta.MemberType;
else if (typeof(IEnumerable).IsAssignableFrom(meta.MemberType))
_exposedType = typeof(IEnumerable);
else
_exposedType = typeof(object);
}
public BindingListSlot(ViewProxy proxy, MemberMeta member)
: base(proxy, member)
{
_newItemMethod = GetNewItemMethod(member);
_deleteItemMethod = GetDeleteItemMethod(member);
_bindingList.AllowNew = true;
_bindingList.AllowEdit = true;
_bindingList.AllowRemove = true;
_bindingList.AddingNew += BindingList_AddingNew;
_bindingList.ListChanged += BindingList_ListChanged;
}
internal static MemberMeta Intercept(MemberMeta member)
{
var unwrapped = UnwrapObservableType(member.MemberType, typeof(Observable <>));
if (unwrapped != null)
{
return(new ObservableMeta(member, unwrapped));
}
else
{
return(member);
}
}
private static MethodInfo GetNewItemMethod(MemberMeta member)
{
var method = member.DeclaringType.Type.GetMethodPortable($"NewItemIn{member.Name}");
if (method != null &&
method.GetParameters().Length == 0)
{
return(method);
}
else
{
return(null);
}
}
protected MemberSlot(ViewProxy proxy, MemberMeta member)
{
Proxy = proxy;
Member = member;
if (member.CanRead)
{
// When the property is out of date, update it from the wrapped object.
_computed = new Computed(() => BindingInterceptor.Current.UpdateValue(this));
// When the property becomes out of date, trigger an update.
// The update should have lower priority than user input & drawing,
// to ensure that the app doesn't lock up in case a large model is
// being updated outside the UI (e.g. via timers or the network).
_computed.Invalidated += () => UpdateScheduler.ScheduleUpdate(UpdateNow);
}
}
protected MemberSlot(ViewProxy proxy, MemberMeta member)
{
Proxy = proxy;
Member = member;
if (member.CanRead)
{
// When the property is out of date, update it from the wrapped object.
_computed = new Computed(() => BindingInterceptor.Current.UpdateValue(this));
// When the property becomes out of date, trigger an update.
// The update should have lower priority than user input & drawing,
// to ensure that the app doesn't lock up in case a large model is
// being updated outside the UI (e.g. via timers or the network).
_computed.Invalidated += () => UpdateScheduler.ScheduleUpdate(UpdateNow);
}
}
private MethodInfo GetDeleteItemMethod(MemberMeta member)
{
var method = member.DeclaringType.Type.GetMethodPortable($"DeleteItemFrom{member.Name}");
if (method != null &&
method.GetParameters().Length == 1 &&
method.GetParameters()[0].ParameterType == GetElementType(member))
{
return(method);
}
else
{
return(null);
}
}
public ListSlot(ViewProxy proxy, MemberMeta member)
: base(proxy, member)
{
_collectionChangedFromUIEventHandler = new NotifyCollectionChangedEventHandler((s, e) =>
{
if (!_publishingChanges)
{
switch (e.Action)
{
case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems)
{
_sourceCollection.Add(UnwrapValue(item));
}
_computed.MakeDependentsOutOfDate();
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Remove:
foreach (var item in e.OldItems)
{
_sourceCollection.Remove(UnwrapValue(item));
}
_computed.MakeDependentsOutOfDate();
break;
case NotifyCollectionChangedAction.Reset:
_sourceCollection.Clear();
_computed.MakeDependentsOutOfDate();
break;
default:
break;
}
if (Proxy.IsNotifying)
{
// The view is modifying the list in response to another update.
// After it stops, notify it of other changes so that it can get the correct list.
Proxy.WasModified(this);
}
}
});
}
protected ValuePropertyMeta(MemberMeta observable, Type unwrappedType)
: base(observable.DeclaringType, observable.Name, unwrappedType)
{
UnderlyingMember = observable;
_valueProperty = observable.MemberType.GetPropertyPortable("Value");
}
ObservableMeta(MemberMeta observable, Type unwrappedType)
: base(observable, unwrappedType)
{
}
public MemberSlot LookupSlot(MemberMeta member)
{
return(_slots.FirstOrDefault(s => s.Member == member));
}
internal AtomSlot(ViewProxy proxy, MemberMeta member)
: base(proxy, member)
{
}
internal AtomSlot(ViewProxy proxy, MemberMeta member)
: base(proxy, member)
{
}
public PassThroughSlot(ViewProxy proxy, MemberMeta member) : base(proxy, member)
{
}
public CollectionSlot(ViewProxy proxy, MemberMeta member)
: base(proxy, member)
{
}
public ProxyXamlMember(IXamlType owner, MemberMeta meta)
{
_owner = owner;
_meta = meta;
}
ObservableMeta(MemberMeta observable, Type unwrappedType)
: base(observable, unwrappedType)
{
}
internal static MemberMeta InterceptAny(MemberMeta member)
{
return(ComputedMeta.Intercept(ObservableMeta.Intercept(member)));
}
public static bool AppliesTo(MemberMeta member)
{
return(GetNewItemMethod(member) != null);
}