import type { BookletChapter } from './booklet-structure';
export type BookletTimelineStyle = 'off' | 'canvas';
export type TimelineMarkerKind = 'birth' | 'death' | 'marriage';
export interface TimelineMarker {
    readonly year: number;
    readonly kind: TimelineMarkerKind;
}
export interface TimelineRow {
    readonly name: string;
    readonly shortName: string;
    readonly birthYear: number | null;
    readonly deathYear: number | null;
    readonly markers: readonly TimelineMarker[];
    readonly hasLifeSpan: boolean;
}
export interface GenerationTimelineLayout {
    readonly chapterTitle: string;
    readonly yearMin: number;
    readonly yearMax: number;
    readonly tickStep: number;
    readonly tickYears: readonly number[];
    readonly rows: readonly TimelineRow[];
    readonly overflowCount: number;
    readonly pageCount: number;
}
export declare function chapterSupportsTimeline(chapter: BookletChapter): boolean;
export declare function parseYearFromDate(date: string): number | null;
export declare function timelineRowCount(chapter: BookletChapter): number;
export declare function buildGenerationTimeline(chapter: BookletChapter, rowStart?: number, rowCount?: number): GenerationTimelineLayout | null;
/** Position X normalisée 0–1 dans la plage [yearMin, yearMax]. */
export declare function timelineXNorm(year: number, yearMin: number, yearMax: number): number;