@Override
 public LayerCell getCellByPosition(int columnPosition, int rowPosition) {
   int underlyingColumnPosition = localToUnderlyingColumnPosition(columnPosition);
   int underlyingRowPosition = localToUnderlyingRowPosition(rowPosition);
   LayerCell cell =
       underlyingLayer.getCellByPosition(underlyingColumnPosition, underlyingRowPosition);
   if (cell != null) {
     cell.updatePosition(
         this,
         underlyingToLocalColumnPosition(underlyingLayer, cell.getOriginColumnPosition()),
         underlyingToLocalRowPosition(underlyingLayer, cell.getOriginRowPosition()),
         underlyingToLocalColumnPosition(underlyingLayer, cell.getColumnPosition()),
         underlyingToLocalRowPosition(underlyingLayer, cell.getRowPosition()));
   }
   return cell;
 }
  private static HsMultiCellEditor activeCell(
      ViewportLayer vLayer,
      XLIFFEditorImplWithNatTable xliffEditor,
      IConfigRegistry configRegistry,
      int columnIndex,
      int rowIndex,
      int rowPosition,
      String cellType) {
    NatTable natTable = xliffEditor.getTable();
    int columnPosition = vLayer.getColumnPositionByIndex(columnIndex);

    LayerCell cell = natTable.getCellByPosition(columnPosition, rowPosition);
    if (cell == null) {
      return null;
    }
    Rectangle cellBounds = cell.getBounds();
    List<String> configLabels = cell.getConfigLabels().getLabels();
    if (!xliffEditor.isHorizontalLayout()) {
      if (cellType.equals(NatTableConstant.SOURCE)) {
        configLabels.remove(XLIFFEditorImplWithNatTable.TARGET_EDIT_CELL_LABEL);
      } else if (cellType.equals(NatTableConstant.TARGET)) {
        configLabels.remove(XLIFFEditorImplWithNatTable.SOURCE_EDIT_CELL_LABEL);
      }
    }
    ILayer layer = cell.getLayer();
    Object originalCanonicalValue = cell.getDataValue();

    IDisplayConverter displayConverter =
        configRegistry.getConfigAttribute(
            CellConfigAttributes.DISPLAY_CONVERTER, DisplayMode.EDIT, configLabels);
    IStyle cellStyle = new CellStyleProxy(configRegistry, DisplayMode.EDIT, configLabels);
    IDataValidator dataValidator =
        configRegistry.getConfigAttribute(
            EditConfigAttributes.DATA_VALIDATOR, DisplayMode.EDIT, configLabels);

    Rectangle editorBounds =
        layer
            .getLayerPainter()
            .adjustCellBounds(
                new Rectangle(cellBounds.x, cellBounds.y, cellBounds.width, cellBounds.height));

    int cellStartY = cellBounds.y;
    int cellEndY = cellStartY + cellBounds.height;
    Rectangle clientArea = natTable.getClientAreaProvider().getClientArea();
    int clientAreaEndY = clientArea.y + clientArea.height;
    if (cellEndY > clientAreaEndY) {
      editorBounds.height = clientAreaEndY - cellStartY;
    }

    StyledTextCellEditor cellEditor =
        (StyledTextCellEditor)
            configRegistry.getConfigAttribute(
                EditConfigAttributes.CELL_EDITOR, DisplayMode.EDIT, configLabels);
    ICellEditHandler editHandler = new HsMultiCellEditorHandler(cellEditor, layer);

    HsMultiCellEditor hsCellEditor =
        new HsMultiCellEditor(
            cellType,
            cellEditor,
            editHandler,
            columnPosition,
            rowPosition,
            columnIndex,
            rowIndex,
            dataValidator,
            originalCanonicalValue,
            displayConverter,
            cellStyle,
            editorBounds);

    return hsCellEditor;
  }