import React from 'react';
import { RouteComponentProps } from 'react-router';
import H from 'history';
import { TitleDesc, ContextValue } from './type';
export interface ProviderProps {
    /**
     * 自定义title格式化字符串. 由于title的children类型为React.ReactNode, 而不是字符串格式化. 所以需要
     * 一个格式化器进行格式化，默认实现是获取dom元素的innerText属性
     */
    titleFormatter?: (titles: TitleDesc[]) => string;
    /**
     * debug 模式
     * @default false
     */
    debug?: boolean;
    children?: React.ReactNode;
}
export interface InnerProviderProps extends ProviderProps, RouteComponentProps<{}> {
}
export declare const Context: React.Context<ContextValue>;
/**
 * Provider 保存title元数据
 */
export declare class InnerProvider extends React.Component<InnerProviderProps, ContextValue> {
    static getDerivedStateFromProps(props: InnerProviderProps, state: ContextValue): {
        location: H.Location<any>;
    } | null;
    private el;
    constructor(props: InnerProviderProps);
    render(): JSX.Element;
    private updateDocumentTitle;
    /**
     * 更新title内容
     */
    private updateTitle;
    private popTitle;
    private setTitle;
}
export default function Provider(props: ProviderProps): JSX.Element;