import { InjectionToken } from '@angular/core';
import { ActivatedRouteSnapshot, IsActiveMatchOptions, NavigationEnd, Router } from '@angular/router';
import { ArrayBehaviorState } from '../rx';
import { Sitemap, SiteRef } from '../sitemap/sitemap';
export interface ActiveSiteRef extends SiteRef {
    activatedRoute: ActivatedRouteSnapshot;
}
export interface BreadcrumbSiteRef extends ActiveSiteRef {
    title?: string;
}
export declare type BreadcrumbTitleSelector = (site: ActiveSiteRef) => string;
export declare const BREADCRUMB_TITLE_SELECTOR: InjectionToken<BreadcrumbTitleSelector>;
export declare class Breadcrumbs extends ArrayBehaviorState<BreadcrumbSiteRef> {
    readonly sitemap: Sitemap;
    protected router: Router;
    protected titleSelector?: BreadcrumbTitleSelector;
    constructor(sitemap: Sitemap, router: Router, titleSelector?: BreadcrumbTitleSelector);
    protected onNavigationEnd(e: NavigationEnd): void;
    isActiveSite(site: SiteRef, options?: Partial<IsActiveMatchOptions>): boolean;
    findActiveSite(sites: SiteRef[], options?: Partial<IsActiveMatchOptions>): SiteRef | null;
    resolveActiveSitePath(): BreadcrumbSiteRef[];
    protected mapActiveSiteRef(site: SiteRef): BreadcrumbSiteRef;
}