/**
 * Anchors (#261): the points of a document a cross-reference may name —
 * a heading with an identifier (`## Title {#id}`), an anchor set in the
 * text (`:anchor{#id}`, `[text]{#id}`) and a container opened with one
 * (`:::callout{#id}`). After layout each is located: the page it landed on
 * and the top-left of its heading or line, which the renderers turn into
 * link destinations and the sandbox scrolls to.
 */
import type { ContentBlock } from '../parse/index.js';
import type { VDTAnchor, VDTDocument } from '../vdt.js';
/** Whether the parsed content sets any anchor. */
export declare function hasAnchors(blocks: readonly ContentBlock[]): boolean;
/**
 * Where each anchor of `blocks` (the parsed markdown body) landed in the
 * laid-out `doc`. A heading's anchor is its first fragment; an inline
 * anchor is the line holding the character it is attached to (as for an
 * index mark, see `locateIndexMarks`), else the nearest line on the side
 * it attaches to. Undefined when the document sets no anchor.
 */
export declare function locateAnchors(doc: VDTDocument, blocks: readonly ContentBlock[], bodyOffset: number): VDTAnchor[] | undefined;
/** The identifiers set more than once in `blocks`, each with the source
 *  ranges of its second and later settings (`duplicateAnchor`). */
export declare function duplicateAnchors(blocks: readonly ContentBlock[]): {
    id: string;
    start: number;
    end: number;
}[];
//# sourceMappingURL=anchors.d.ts.map