import type { Cell } from '@fortune-sheet/core';
import type { WorkSpreadsheetSheet } from '../work-types';
/**
 * WPS/Excel "Show Formulas" (Ctrl+`): paint formula text in cells that have
 * native formulas. Projection is display-only and must not be written back.
 */
export declare function spreadsheetFormulaDisplayText(cell: Cell | null | undefined): string | null;
export declare function projectSpreadsheetCellShowingFormula(cell: Cell | null | undefined): Cell | null | undefined;
export declare function projectSpreadsheetSheetShowingFormulas(sheet: WorkSpreadsheetSheet): WorkSpreadsheetSheet;
export declare function projectSpreadsheetSheetsShowingFormulas(sheets: readonly WorkSpreadsheetSheet[]): WorkSpreadsheetSheet[];