/**
 * Section ordinal fold.
 *
 * A user-defined `section` can be split into several layout chunks (a columns
 * transition starts a new one). Every chunk of one section must share a single
 * bookmark: the start lands in the first chunk, the end in the last, and a
 * section-scoped TOC in between resolves against the same name.
 *
 * The ordinal is a fold over the chunk list, not a property of a chunk, so it
 * cannot be computed from `layout.sections[i]` alone. Computing it once up
 * front keeps the render loop free of the loop-carried counter it used to
 * thread through header/footer bookkeeping.
 */
/** The chunk fields the fold depends on. */
export interface SectionOrdinalInput {
    /** True for the first layout chunk of a user-defined section. */
    isUserSection: boolean;
    /** True for every layout chunk of a user-defined section. */
    belongsToUserSection: boolean;
}
export interface SectionOrdinal {
    /** 1-based ordinal shared by all chunks of one section; undefined outside. */
    ordinal?: number;
    /** True on the last chunk of a section, where the bookmark end belongs. */
    closeBookmark: boolean;
}
/**
 * Resolve the bookmark ordinal and closing chunk for every layout section.
 * Pure: same input, same output, no allocation against any registry.
 */
export declare function computeSectionOrdinals(sections: readonly SectionOrdinalInput[]): SectionOrdinal[];
//# sourceMappingURL=sectionOrdinals.d.ts.map