OpenTween.TweenMain.GoFav C# (CSharp) Method

        private void GoFav(bool forward)
        {
            if (_curList.VirtualListSize == 0) return;
            int fIdx = 0;
            int toIdx = 0;
            int stp = 1;

            if (forward)
            {
                if (_curList.SelectedIndices.Count == 0)
                {
                    fIdx = 0;
                }
                else
                {
                    fIdx = _curList.SelectedIndices[0] + 1;
                    if (fIdx > _curList.VirtualListSize - 1) return;
                }
                toIdx = _curList.VirtualListSize;
                stp = 1;
            }
            else
            {
                if (_curList.SelectedIndices.Count == 0)
                {
                    fIdx = _curList.VirtualListSize - 1;
                }
                else
                {
                    fIdx = _curList.SelectedIndices[0] - 1;
                    if (fIdx < 0) return;
                }
                toIdx = -1;
                stp = -1;
            }

            for (int idx = fIdx; idx != toIdx; idx += stp)
            {
                if (_statuses.Tabs[_curTab.Text][idx].IsFav)
                {
                    SelectListItem(_curList, idx);
                    _curList.EnsureVisible(idx);
                    break;
                }
            }
        }