bool Undo(Excel excel)
{
bool flag;
CellRange[] oldSelection = (_workSheet.Selections != null) ? Enumerable.ToArray <CellRange>((IEnumerable <CellRange>)_workSheet.Selections) : null;
List <CellData> oldValues = null;
CellRange fillRange = _dragFillExtent.FillRange;
if ((_savedFilledViewportCells != null) && _savedFilledViewportCells.IsValueSaved())
{
oldValues = CopyMoveHelper.GetValues(_workSheet, fillRange.Row, fillRange.Column, fillRange.RowCount, fillRange.ColumnCount);
}
if (_dragFillExtent.AutoFillType == AutoFillType.ClearValues)
{
flag = UndoDragClear(excel);
}
else
{
flag = UndoDragFill(excel);
}
excel.CloseDragFillPopup();
if ((oldValues != null) && object.ReferenceEquals(excel.ActiveSheet, _workSheet))
{
CopyMoveHelper.RaiseValueChanged(excel, fillRange.Row, fillRange.Column, fillRange.RowCount, fillRange.ColumnCount, oldValues);
}
CellRange[] newSelection = (_workSheet.Selections != null) ? Enumerable.ToArray <CellRange>((IEnumerable <CellRange>)_workSheet.Selections) : null;
if (excel.RaiseSelectionChanging(oldSelection, newSelection))
{
excel.RaiseSelectionChanged();
}
excel.RefreshCellAreaViewport(0, 0, _workSheet.RowCount, _workSheet.ColumnCount);
return(flag);
}
