import type { Cell } from '@fortune-sheet/core';
import type { WorkSpreadsheetContent } from '../work-types';
export type SpreadsheetRichTextFormatAttribute = 'bl' | 'cl' | 'fc' | 'ff' | 'fs' | 'it' | 'un';
export type SpreadsheetRichTextToggleAttribute = 'bl' | 'cl' | 'it' | 'un';
export interface SpreadsheetTextSelection {
    end: number;
    start: number;
}
export interface SpreadsheetRichTextSelectionFormatRequest {
    attribute: SpreadsheetRichTextFormatAttribute;
    column: number;
    row: number;
    selection: SpreadsheetTextSelection;
    sheetId: string;
    /**
     * A cell reconstructed from the live editor before focus moves into a
     * ribbon popover. It is intentionally internal and still passes through all
     * text, run-count, coordinate, and formatting bounds below.
     */
    sourceCell?: Cell;
    value: unknown;
}
export declare function canApplySpreadsheetRichTextSelectionFormat(content: WorkSpreadsheetContent, request: SpreadsheetRichTextSelectionFormatRequest): boolean;
export declare function applySpreadsheetRichTextSelectionFormat(content: WorkSpreadsheetContent, request: SpreadsheetRichTextSelectionFormatRequest): WorkSpreadsheetContent | null;
export declare function formatSpreadsheetRichTextSelection(cell: Cell, selection: SpreadsheetTextSelection, attribute: SpreadsheetRichTextFormatAttribute, value: unknown): Cell | null;
export declare function spreadsheetRichTextSelectionToggleValue(cell: Cell, selection: SpreadsheetTextSelection, attribute: SpreadsheetRichTextToggleAttribute): 0 | 1 | null;