import { Book, Section, TOCItem } from './types';
export interface SectionIndexLookup {
    readonly byId: ReadonlyMap<string | number, number>;
    readonly byPath: ReadonlyMap<string, number>;
}
export declare function flattenTOC(items: readonly TOCItem[] | null | undefined): TOCItem[];
export declare function normalizeTOCHref(href?: string | null): string;
export declare function normalizeNavigationHref(href?: string | null): string;
export declare function normalizeBookPath(href?: string | null): string;
export declare function createSectionIndexLookup(book: Pick<Book, 'sections'>): SectionIndexLookup;
export declare function findSectionIndex(lookup: SectionIndexLookup, id: string | number): number;
export declare function resolveTOCSectionIndex(book: Pick<Book, 'sections' | 'resolveHref' | 'splitTOCHref'>, href: string, sectionLookup?: SectionIndexLookup): number;
export declare function findTOCItemForSection(book: Pick<Book, 'toc' | 'sections' | 'resolveHref' | 'splitTOCHref'>, sectionIndex: number, section?: Section | undefined, sectionLookup?: SectionIndexLookup): TOCItem | null;
export declare function isSameTOCItem(item: TOCItem, activeItem: TOCItem | null): boolean;
//# sourceMappingURL=toc.d.ts.map