import type { Alignment } from './alignment';
import type { Border } from './borders';
import type { Fill } from './fills';
import type { Font } from './fonts';
import type { NumberFormat } from './numbers';
import type { Protection } from './protection';
import type { Stylesheet } from './stylesheet';
/**
 * Differential ("partial") style. Every component is optional; only
 * the set fields override the base style of whatever the DXF is
 * applied to.
 */
export interface DifferentialStyle {
    readonly font?: Font;
    readonly fill?: Fill;
    readonly border?: Border;
    readonly alignment?: Alignment;
    readonly protection?: Protection;
    /**
     * NumberFormat carries both the id and the format code so DXFs can
     * reference custom user-defined number formats without ambiguity.
     */
    readonly numFmt?: NumberFormat;
}
export declare function makeDifferentialStyle(opts?: Partial<DifferentialStyle>): DifferentialStyle;
/**
 * Stylesheet pool extension. The DXF list is allocated lazily on first
 * use so empty stylesheets stay slim.
 */
export interface StylesheetWithDxfs extends Stylesheet {
    dxfs?: DifferentialStyle[];
    _dxfIdByKey?: Map<string, number>;
}
/**
 * Add a DifferentialStyle to the stylesheet's `dxfs` pool. Returns
 * the 0-based index. Idempotent on structural equality (via
 * stableStringify).
 */
export declare function addDxf(ss: Stylesheet, dxf: DifferentialStyle): number;
/** Read-only access to the dxfs pool. Returns `[]` when none registered. */
export declare function getDxfs(ss: Stylesheet): ReadonlyArray<DifferentialStyle>;