import { RadiantElement } from '@ecopages/radiant';
export type RuiTocProps = {
    /** CSS selector for the content root that contains headings. */
    target?: string;
    /** Selector for headings to include. Default: `h2,h3`. */
    headingSelector?: string;
    /** Visible label above the link list. Default: `On this page`. */
    label?: string;
    /** Pixel offset from the viewport top when tracking the active section. Default: `120`. */
    scrollOffset?: number;
    /**
     * Extra document event names (comma-separated) that trigger a rebuild, e.g.
     * `eco:page-load,eco:after-swap`.
     */
    navigationEvents?: string;
};
type RuiTocBindings = {
    target: string;
    headingSelector: string;
    label: string;
    scrollOffset: number;
    navigationEvents: string;
};
/**
 * `<rui-toc>` — table of contents that tracks in-page headings and highlights the
 * section currently in view while scrolling.
 *
 * @remarks
 * Resolves the nearest overflow scroll ancestor of the target (not always
 * `window`) so nested layout scrollers — e.g. docs inset content — drive
 * active-section tracking correctly.
 *
 * @element rui-toc
 * @attr {string} target - CSS selector for the content root that contains headings. Default: the parent element.
 * @attr {string} heading-selector - Selector for headings to include. Default: `h2,h3`.
 * @attr {string} label - Visible label above the link list. Default: `On this page`.
 * @attr {number} scroll-offset - Pixel offset from the viewport top when tracking the active section. Default: `120`.
 * @attr {string} navigation-events - Extra document event names (comma-separated) that trigger a rebuild, e.g. `eco:page-load,eco:after-swap`.
 * @cssclass rui-toc - Root `nav` landmark.
 * @cssclass rui-toc__label - Section label above the list.
 * @cssclass rui-toc__list - Link list.
 * @cssclass rui-toc__item - List item.
 * @cssclass rui-toc__item--depth-3 - Indented item for `h3` headings.
 * @cssclass rui-toc__link - Heading jump link.
 * @cssclass rui-toc__link--active - Link for the section currently in view.
 */
export declare class RuiToc extends RadiantElement<RuiTocBindings> {
    target: string;
    headingSelector: string;
    label: string;
    scrollOffset: number;
    navigationEvents: string;
    private entries;
    private activeId;
    private headings;
    private scrollRoot;
    private scrollCleanup;
    private navigationCleanups;
    private pendingScrollTargetId;
    private scrollRafPending;
    private readonly scrollOffsetTolerance;
    private readConfiguredProp;
    private readConfiguredNumber;
    connectedCallback(): void;
    protected onConnected(): void;
    disconnectedCallback(): void;
    onScanSettingsUpdated(): void;
    private rebuild;
    private resolveTarget;
    private resolvedScrollOffset;
    /**
     * Nearest ancestor (including the target) that scrolls vertically, else `window`.
     */
    private resolveScrollRoot;
    private headingDepth;
    private attachNavigationListeners;
    private detachNavigationListeners;
    private attachScrollListener;
    private detachScrollListener;
    private isScrollAtBottom;
    private activeLineY;
    private updateActiveHeading;
    private setActiveId;
    private findHeadingById;
    private hasPendingScrollReachedTarget;
    private onLinkClick;
    private scrollToHeading;
    render(): import("@ecopages/jsx").JsxRenderable;
}
export {};