import { FlexibleConnectedPositionStrategy, Overlay, OverlayConfig, OverlayOutsideClickDispatcher, OverlayRef, PositionStrategy } from '@angular/cdk/overlay';
import { ElementRef, ViewContainerRef } from '@angular/core';
import { FocusMonitor, FocusOrigin } from '@angular/cdk/a11y';
import { OverlayPositionConfig } from './overlay-position-config';
import { OverlayBaseComponent } from './overlay-base';
import * as i0 from "@angular/core";
export declare class OverlayService {
    private _overlay;
    private _focusMonitor;
    private _outsideClickDispatcher;
    constructor(_overlay: Overlay, _focusMonitor: FocusMonitor, _outsideClickDispatcher: OverlayOutsideClickDispatcher);
    createOverlay(config: OverlayConfig, component: OverlayBaseComponent, viewContainerRef: ViewContainerRef): OverlayRef;
    closeOverlay(overlayRef: OverlayRef, element: ElementRef<HTMLElement>): void;
    restoreFocus(element: ElementRef<HTMLElement>, origin?: FocusOrigin, options?: FocusOptions): void;
    desktopPositionStrategy(element: ElementRef<HTMLElement>, selector: string): FlexibleConnectedPositionStrategy;
    touchPositionStrategy(): PositionStrategy;
    setPosition(positionStrategy: FlexibleConnectedPositionStrategy, positionConfig: OverlayPositionConfig): FlexibleConnectedPositionStrategy;
    subscribeOutsideClick(overlayRef: OverlayRef, callback?: () => void): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<OverlayService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<OverlayService>;
}