/// <summary>
/// Recursively writes the <see cref="IUndoAction"/>s to the output stream
/// </summary>
/// <param name="bw"></param>
/// <param name="action"></param>
private void WriteAction(BinaryWriter bw, IUndoAction action)
{
if (action is MultiUndoAction multiUndoAction)
{
bw.Write(true); // It's a MultiUndoAction
int actionCount = multiUndoAction.Actions.Length;
bw.Write(actionCount);
// bw.Write(multiUndoAction.ActionString) // TODO: Action string
foreach (var subAction in multiUndoAction.Actions)
{
WriteAction(bw, subAction);
}
}
else if (action is UndoActionObject undoActionObject)
{
bw.Write(false);
bw.Write(this.ObjectDiffPacket);
bw.Write(UndoActionObjectSerializer.ToJson(undoActionObject));
}
else
{
bw.Write(false);
string typeName = action.GetType().AssemblyQualifiedName;
string data = FlaxEngine.Json.JsonSerializer.Serialize(action);
bw.Write(typeName);
bw.Write(data);
}
}
public IUndoAction DeserializeUndoAction(string typeName, string data)
{
// Handle object modifications, special case
if (typeName == this.ObjectDiffPacket)
{
return(UndoActionObjectSerializer.FromJson(data));
}
// Otherwise, generically deserialize it
object undoAction =
System.Runtime.Serialization.FormatterServices.GetUninitializedObject(Type.GetType(typeName));
FlaxEngine.Json.JsonSerializer.Deserialize(undoAction, data);
// Special deserialisation cases for a few undo actions
/*if (undoAction is DeleteActorsAction deleteAction)
* {
* // Get node parents
* FieldInfo nodeParentsField = typeof(DeleteActorsAction).GetField("_nodeParents", BindingFlags.NonPublic | BindingFlags.Instance);
* List<ActorNode> nodeParents = nodeParentsField.GetValue(deleteAction) as List<ActorNode>;
* if (nodeParents == null || nodeParents.Count <= 0)
* {
* // Deleting
* // Get the actor Guids
* FieldInfo actorDataField = typeof(DeleteActorsAction).GetField("_data", BindingFlags.NonPublic | BindingFlags.Instance);
* byte[] actorData = actorDataField.GetValue(deleteAction) as byte[];
* Guid[] deletedActorGuids = Actor.TryGetSerializedObjectsIds(actorData);
*
* // Get the nodes in the scene graph
* var actorNodes = new List<ActorNode>(deletedActorGuids.Length);
* for (int i = 0; i < deletedActorGuids.Length; i++)
* {
* var foundNode = SceneGraphFactory.FindNode(deletedActorGuids[i]);
* if (foundNode is ActorNode node)
* {
* actorNodes.Add(node);
* }
* }
*
* // Set the node parents field (used internally when deleting actors)
* actorNodes.BuildNodesParents(nodeParents);
* }
* }
* else*/
if (undoAction is SelectionChangeAction selectionChangeAction)
{
// Selection change action custom handling
var callbackProp = typeof(SelectionChangeAction).GetField("_callback",
BindingFlags.NonPublic | BindingFlags.Instance);
var callbackMethod = typeof(SceneEditingModule).GetMethod("OnSelectionUndo",
BindingFlags.NonPublic | BindingFlags.Instance);
Action <SceneGraphNode[]> callbackLambda =
(param) => callbackMethod.Invoke(Editor.Instance.SceneEditing, new object[] { param });
callbackProp.SetValue(selectionChangeAction, callbackLambda);
}
return(undoAction as IUndoAction);
}