export type SortBy = 'value' | 'cellColor' | 'fontColor' | 'icon';
export type SortMethod = 'stroke' | 'pinYin';
export type SortIconSet = '3Arrows' | '3ArrowsGray' | '3Flags' | '3TrafficLights1' | '3TrafficLights2' | '3Signs' | '3Symbols' | '3Symbols2' | '4Arrows' | '4ArrowsGray' | '4RedToBlack' | '4Rating' | '4TrafficLights' | '5Arrows' | '5ArrowsGray' | '5Rating' | '5Quarters';
export interface SortCondition {
    /** Column or row that drives this sort key. */
    ref: string;
    descending?: boolean;
    sortBy?: SortBy;
    /** Reference to a custom-list defined name. */
    customList?: string;
    /** Differential-style index (`<dxf>` slot in the stylesheet). */
    dxfId?: number;
    iconSet?: SortIconSet;
    iconId?: number;
}
export interface SortState {
    /** Range the sort applies to (`A1:D20`). */
    ref: string;
    conditions: SortCondition[];
    /** Sort columns instead of rows (rare). */
    columnSort?: boolean;
    caseSensitive?: boolean;
    sortMethod?: SortMethod;
}
export declare const makeSortCondition: (opts: SortCondition) => SortCondition;
export declare const makeSortState: (opts: Partial<SortState> & {
    ref: string;
}) => SortState;