import type { Cell } from '@fortune-sheet/core';
import type { WorkSpreadsheetSheet } from '../work-types';
import { type SpreadsheetCellRange, type SpreadsheetCellRangeInput } from './spreadsheet-cell-range';
/**
 * Finds the bounded rectangular current region that contains a seed range.
 * Dense and sparse worksheets share this reader so filter and sort commands do
 * not derive different expansion boundaries from the same controlled sheet.
 */
export declare function spreadsheetCurrentRegion(sheet: WorkSpreadsheetSheet, seed: SpreadsheetCellRangeInput): SpreadsheetCellRange | null;
export declare function spreadsheetRowHasContent(cellAt: (row: number, column: number) => Cell | null, row: number, startColumn: number, endColumn: number): boolean;
export declare function spreadsheetCellHasContent(cell: Cell | null): boolean;
export declare function spreadsheetSheetCellReader(sheet: WorkSpreadsheetSheet): (row: number, column: number) => Cell | null;