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

The Pro plan edition of the MUI X Data Grid components.

import _extends from "@babel/runtime/helpers/esm/extends";
import { gridRowNodeSelector } from '@mui/x-data-grid';
/**
 * Adjusts the row fetch parameters to align with page boundaries.
 * - Start index is decreased to the start of the page
 * - End index is increased to the end of the page (capped by rowCount - 1 if defined)
 */
export const adjustRowParams = (params, options) => {
  if (typeof params.start !== 'number') {
    return params;
  }
  const {
    pageSize,
    rowCount
  } = options;
  const adjustedStart = params.start - params.start % pageSize;
  const pageAlignedEnd = params.end + pageSize - params.end % pageSize - 1;
  // rowCount of -1 means "unknown/infinite", treat same as undefined (no capping)
  const maxEnd = rowCount !== undefined && rowCount !== -1 ? Math.max(0, rowCount - 1) : Infinity;
  return _extends({}, params, {
    start: adjustedStart,
    end: Math.min(maxEnd, pageAlignedEnd)
  });
};
export const findSkeletonRowsSection = ({
  apiRef,
  visibleRows,
  range
}) => {
  let {
    firstRowIndex,
    lastRowIndex
  } = range;
  const visibleRowsSection = visibleRows.slice(range.firstRowIndex, range.lastRowIndex);
  let startIndex = 0;
  let endIndex = visibleRowsSection.length - 1;
  let isSkeletonSectionFound = false;
  while (!isSkeletonSectionFound && firstRowIndex < lastRowIndex) {
    const isStartingWithASkeletonRow = gridRowNodeSelector(apiRef, visibleRowsSection[startIndex].id)?.type === 'skeletonRow';
    const isEndingWithASkeletonRow = gridRowNodeSelector(apiRef, visibleRowsSection[endIndex].id)?.type === 'skeletonRow';
    if (isStartingWithASkeletonRow && isEndingWithASkeletonRow) {
      isSkeletonSectionFound = true;
    }
    if (!isStartingWithASkeletonRow) {
      startIndex += 1;
      firstRowIndex += 1;
    }
    if (!isEndingWithASkeletonRow) {
      endIndex -= 1;
      lastRowIndex -= 1;
    }
  }
  return isSkeletonSectionFound ? {
    firstRowIndex,
    lastRowIndex
  } : undefined;
};