import type { jsPDF as JsPdf } from 'jspdf';
import type { WorkPdfPageBounds, WorkPdfPagePoints } from './work-pdf-text-layer';
/** One external hyperlink hotspot in page-local CSS pixels. */
export interface WorkPdfExternalLinkBox {
    /** Accessible label: visible link text, else href. */
    alt: string;
    height: number;
    href: string;
    width: number;
    x: number;
    y: number;
}
/**
 * Collects visible `a[href]` hotspots that use http(s) targets inside a page
 * bounds. Internal `#` anchors, empty, javascript:, and oversized hrefs are
 * omitted (fail soft). Not a PDF/UA certification claim.
 */
export declare function collectWorkPdfExternalLinkBoxes(root: ParentNode, page: WorkPdfPageBounds): WorkPdfExternalLinkBox[];
/**
 * Writes deferred URI link annotations for collected hotspots and registers
 * matching `/Link` StructElems with `/OBJR` association. Coordinates map from
 * page-local CSS pixels into PDF user space (origin top-left → jsPDF y-down
 * flip via getVerticalCoordinateString on putPage).
 */
export declare function appendWorkPdfExternalLinkAnnotations(pdf: JsPdf, links: readonly WorkPdfExternalLinkBox[], pageCss: WorkPdfPageBounds, pagePoints: WorkPdfPagePoints): void;