import { WindowService } from '../window/window.service';
import { MessageType } from '../frame-guest/frame-guest.service';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class FrameHostService {
    private windowService;
    private listener;
    private subjects;
    private window;
    constructor(windowService: WindowService);
    /**
     * Allow an external event to get an observable that emits when the event happens.
     * @param messageType
     */
    getMessageSubject(messageType: MessageType): Observable<any>;
    /**
     * Set the window to a different window object. Useful for unit testing.
     * @param newWindow
     */
    setWindow(newWindow: Window): void;
    private addEvent;
    /**
     * Triggers the subject responsible for propagating state.
     * @param event A MessageEvent containing the message.
     */
    private handleRegisteredMessage;
    private removeEvent;
    private send;
    static ɵfac: i0.ɵɵFactoryDeclaration<FrameHostService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FrameHostService>;
}