public static Message[] GetChanges(MessageBridge bridge, Action localAction)
{
var changes = new List <Message>();
ChangeMessageEvent chEvent = (_, changeMsg) => changes.Add(changeMsg);
bridge.ChangeMessageEvent += chEvent;
localAction();
bridge.ChangeMessageEvent -= chEvent;
return(changes.ToArray());
}
public MessageBridge()
{
ObjectContext.ObjectPropertyChanged += (objContext, liveObj, propName) =>
{
if (silencedProps.IsSilenced(liveObj, propName))
{
return;
}
var objectDesc = (ObjectDescriptor)ObjectContext.TypeContext.GetTypeDescriptor(liveObj.GetType(), false);
var newValue = objectDesc.Properties[propName].PropertyInfo.GetValue(liveObj);
ChangeMessageEvent?.Invoke(this, new Message
{
Error = MessageError.NoError,
MessageType = MessageType.PropertyChanged,
ResourceId = liveObj.ResourceId,
PropertyName = propName,
Value = newValue
});
};
ObjectContext.ListChanged += (objContext, liveObj, propDesc, changeArgs) =>
{
var propName = propDesc.PropertyInfo.Name;
if (silencedProps.IsSilenced(liveObj, propName))
{
return;
}
var isReset = changeArgs.Action == NotifyCollectionChangedAction.Reset;
var changeMsg = new Message
{
Error = MessageError.NoError,
MessageType = isReset ? MessageType.PropertyChanged : MessageType.ListChanged,
ResourceId = liveObj.ResourceId,
PropertyName = propName,
ListChanges = isReset ? null : new List <ListChangeItem>()
};
// Action = Add, NewStartingIndex = 0, OldStartingIndex = -1, NewItems = ["inserted item #0"]
// Action = Add, NewStartingIndex = 5, OldStartingIndex = -1, NewItems = ["added item"]
// Action = Remove, NewStartingIndex = -1, OldStartingIndex = 0, NewItems = null, OldItems = ["ListItem #1"]
// Action = Move, NewStartingIndex = 1, OldStartingIndex = 0, NewItems = ["inserted item #0"], OldItems = ["inserted item #0"]
// Action = Replace, NewStartingIndex = 0, OldStartingIndex = 0, NewItems = ["new value"], OldItems = ["ListItem #2"]
for (var i = 0; i < changeArgs.OldItems?.Count; i++)
{
changeMsg.ListChanges.Add(new ListChangeItem {
Action = ListChangeAction.Remove, Index = changeArgs.OldStartingIndex, Value = changeArgs.OldItems[i]
});
}
for (var i = 0; i < changeArgs.NewItems?.Count; i++)
{
changeMsg.ListChanges.Add(new ListChangeItem {
Action = ListChangeAction.Add, Index = changeArgs.NewStartingIndex + i, Value = changeArgs.NewItems[i]
});
}
ChangeMessageEvent?.Invoke(this, changeMsg);
};
}