@mui/x-data-grid/esm/hooks/features/keyboardNavigation/utils.js

The Community plan edition of the Data Grid components (MUI X).

import { gridFilteredSortedRowIdsSelector } from "../filter/gridFilterSelector.js";
import { gridRowSpanningHiddenCellsSelector } from "../rows/gridRowSpanningSelectors.js";
export const getLeftColumnIndex = ({
  currentColIndex,
  firstColIndex,
  lastColIndex,
  isRtl
}) => {
  if (isRtl) {
    if (currentColIndex < lastColIndex) {
      return currentColIndex + 1;
    }
  } else if (!isRtl) {
    if (currentColIndex > firstColIndex) {
      return currentColIndex - 1;
    }
  }
  return null;
};
export const getRightColumnIndex = ({
  currentColIndex,
  firstColIndex,
  lastColIndex,
  isRtl
}) => {
  if (isRtl) {
    if (currentColIndex > firstColIndex) {
      return currentColIndex - 1;
    }
  } else if (!isRtl) {
    if (currentColIndex < lastColIndex) {
      return currentColIndex + 1;
    }
  }
  return null;
};
export function findNonRowSpannedCell(apiRef, rowId, field, rowSpanScanDirection) {
  const rowSpanHiddenCells = gridRowSpanningHiddenCellsSelector(apiRef);
  if (!rowSpanHiddenCells[rowId]?.[field]) {
    return rowId;
  }
  const filteredSortedRowIds = gridFilteredSortedRowIdsSelector(apiRef);
  // find closest non row spanned cell in the given `rowSpanScanDirection`
  let nextRowIndex = filteredSortedRowIds.indexOf(rowId) + (rowSpanScanDirection === 'down' ? 1 : -1);
  while (nextRowIndex >= 0 && nextRowIndex < filteredSortedRowIds.length) {
    const nextRowId = filteredSortedRowIds[nextRowIndex];
    if (!rowSpanHiddenCells[nextRowId]?.[field]) {
      return nextRowId;
    }
    nextRowIndex += rowSpanScanDirection === 'down' ? 1 : -1;
  }
  return rowId;
}