import { InjectionToken } from '@angular/core';
export interface FaviconsConfig {
    icons: IconsConfig;
    cacheBusting?: boolean;
}
export interface IconsConfig {
    [name: string]: IconConfig;
}
export interface IconConfig {
    type: string;
    href: string;
    isDefault?: boolean;
}
export declare let BROWSER_FAVICONS_CONFIG: InjectionToken<FaviconsConfig>;
/**
 * Abstract class that acts as both interface for implementation and as the dependency-injection
 */
export declare abstract class FaviconsService {
    abstract activate(name: string): void;
    abstract reset(): void;
}
/**
 * Provide the browser-oriented implementation of the Favicons class
 */
export declare class BrowserFavicons implements FaviconsService {
    protected elementId: string;
    protected icons: IconsConfig;
    protected useCacheBusting: boolean;
    /**
     * initialize the Favicons service.
     */
    constructor(config: FaviconsConfig);
    /**
     * Active favicon with given identifier
     *
     * @param name favicon name
     */
    activate(name: string): void;
    /**
     * Activate the default favicon (with isDefault set to True)
     */
    reset(): void;
    /**
     * Inject the favicon element into the document header
     *
     * @param type type of icon (.png, .jpeg, etc)
     *
     * @param href location
     */
    protected addNode(type: string, href: string): void;
    /**
     * Return an augmented HREF value with a cache-busting query-string parameter
     *
     * @param href location
     */
    protected cacheBustHref(href: string): string;
    /**
     * I remove any favicon nodes that are not controlled by this service
     */
    protected removeExternalLinkElements(): void;
    /**
     * Remove the favicon node from the document header
     */
    protected removeNode(): void;
    /**
     * Remove existing favicon node and inject a new favicon node with the give
     * elemet settings
     *
     * @param type type of favicon
     * @param href location
     */
    protected setNode(type: string, href: string): void;
}