private void HookIntoUnityEditorUndoSystem()
{
Debug.Log("Hooking into UnityEditor.Undo");
_tracker = ScriptableObject.CreateInstance <UndoRedoTracker>();
if (_tracker == null)
{
throw new NullReferenceException("CreateInstance<UndoRedoTracker>() failed!");
}
_oldUndoRedoCallback = UnityEditor.Undo.undoRedoPerformed;
UnityEditor.Undo.undoRedoPerformed = UndoRedoPerformed;
}
private void UnhookFromUnityEditorUndoSystem()
{
Debug.Log("Unhooking from UnityEditor.Undo");
if (_tracker != null)
{
UnityEditor.Undo.undoRedoPerformed = _oldUndoRedoCallback;
_oldUndoRedoCallback = null;
// FIXME: This doesn't work, lets hope it'll get fixed in the near future.
UnityEditor.Undo.ClearUndo(_tracker);
ScriptableObject.DestroyImmediate(_tracker);
_tracker = null;
}
else
{
throw new InvalidOperationException("Not hooked into UnityEditor.Undo.");
}
}