import React from 'react';
import { Lang, Router, TocData } from '../../models';
import { TocItem as Item } from '../TocItem';
import { TocItemRegistry } from './TocItemRegistry';
import './Toc.scss';
export interface TocProps extends TocData {
    router: Router;
    headerHeight?: number;
    tocTitleIcon?: React.ReactNode;
    hideTocHeader?: boolean;
    lang: Lang;
    singlePage?: boolean;
    onChangeSinglePage?: (value: boolean) => void;
    pdfLink?: string;
}
interface TocState {
    activeId: string | null | undefined;
    fixedById: Record<string, 'opened' | 'closed'>;
    contentScrolled: boolean;
    registry: TocItemRegistry;
}
declare class Toc extends React.Component<TocProps, TocState> {
    contentRef: React.RefObject<HTMLDivElement>;
    rootRef: React.RefObject<HTMLDivElement>;
    activeRef: React.RefObject<Item>;
    containerEl: HTMLElement | null;
    footerEl: HTMLElement | null;
    constructor(props: TocProps);
    getInitialState(): {
        registry: TocItemRegistry;
        fixedById: {};
        activeId: null;
        contentScrolled: boolean;
    };
    componentDidMount(): void;
    componentDidUpdate(prevProps: TocProps, prevState: TocState): void;
    componentWillUnmount(): void;
    render(): JSX.Element;
    computeState(prevState: TocState): {
        activeId: string | null | undefined;
        fixedById: Record<string, "opened" | "closed">;
        contentScrolled: boolean;
        registry: TocItemRegistry;
    };
    private normalizeUrl;
    private renderList;
    private renderEmpty;
    private renderTop;
    private renderBottom;
    private setTocHeight;
    private handleScroll;
    private handleResize;
    private scrollToActiveItem;
    private handleContentScroll;
    private openItem;
    private closeItem;
    private toggleItem;
}
export default Toc;