import type { Dimension, FootnoteNumberFormat, FootnoteNumbering, FootnotePlacement, FootnotesConfig, ResolvedFootnotesConfig } from '../types.js';
export declare const DEFAULT_FOOTNOTES_CONFIG: ResolvedFootnotesConfig;
/** A footnote `numberFormat` in any spelling: `'symbols'` (or `'*'`) for
 *  the reference symbols, else any spelling of a numeral style (see
 *  `parseNumberFormat`). `undefined` for anything else. */
export declare function parseFootnoteNumberFormat(value: unknown, locale?: string): FootnoteNumberFormat | undefined;
/**
 * The values a document's unset footnote fields take when they are not
 * {@link DEFAULT_FOOTNOTES_CONFIG}'s: a Japanese document's (JLReq §4.2),
 * by writing mode, and the per-spread numbering of `placement: 'spread'`.
 * `placement` is the author's, when set: the endnote setting (a full em
 * after the number, turnover lines hung 2 note-ems) goes with endnotes.
 * Empty for every other document, which resolves exactly as before.
 */
export declare function footnoteDocumentDefaults(locale: string | undefined, writingMode: 'horizontal-tb' | 'vertical-rl' | undefined, placement?: FootnotePlacement): {
    placement?: FootnotePlacement;
    numbering?: FootnoteNumbering;
    markerPosition?: 'right';
    markerTemplate?: string;
    numberGap?: 'em';
    hangingIndent?: Dimension;
    separatorWidth?: number;
};
/** `locale`: the document language, which `一` / `壹` formats follow and
 *  whose defaults (Japanese, see {@link footnoteDocumentDefaults}) the
 *  unset fields take, with `writingMode` (`layout.writingMode`). */
export declare function resolveFootnotesConfig(partial?: FootnotesConfig, locale?: string, writingMode?: 'horizontal-tb' | 'vertical-rl'): ResolvedFootnotesConfig;
/** `footnotes` without the fields at their default. `locale` and
 *  `writingMode` are the document's: a Japanese document keeps a value its
 *  own defaults would not give (`markerTemplate: '{n}'`, `placement:
 *  'column'` in a vertical book), so the config reads back as written. */
export declare function stripFootnotesDefaults(footnotes?: FootnotesConfig, locale?: string, writingMode?: 'horizontal-tb' | 'vertical-rl'): FootnotesConfig | undefined;
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