BiomePainter.History.HistoryManager.Redo C# (CSharp) Метод

        public void Redo(Bitmap selection, RegionFile region, Bitmap terrainOverlay, Bitmap biomeOverlay, ref String[,] tooltips, Bitmap populateOverlay, UpdateStatus updateStatus)
        {
            if (!MoveNext())
                return;

            if (undoStack.Last.Value.PreviousAction == null)
            {
                throw new Exception("Redo sanity check failed.");
            }

            if (undoStack.Last.Value is SelectionAction)
            {
                ApplySelectionState((SelectionAction)undoStack.Last.Value, selection);
            }
            else if (undoStack.Last.Value is BiomeAction)
            {
                ApplyBiomeState((BiomeAction)undoStack.Last.Value, region, terrainOverlay, biomeOverlay, ref tooltips, updateStatus);
            }
            else if (undoStack.Last.Value is PopulateAction)
            {
                ApplyPopulateState((PopulateAction)undoStack.Last.Value, region, populateOverlay);
            }

            OnChange();
        }