import { NgZone, OnDestroy } from '@angular/core';
import { Observable, Subscription } from 'rxjs';
import { SkyBreakpoint } from '../breakpoint-observer/breakpoint';
import { SkyMediaBreakpoints } from './media-breakpoints';
import { SkyMediaQueryListener } from './media-query-listener';
import * as i0 from "@angular/core";
/**
 * Utility used to subscribe to viewport and container breakpoint changes.
 */
export declare class SkyMediaQueryService implements OnDestroy {
    #private;
    /**
     * Emits when the breakpoint changes.
     */
    get breakpointChange(): Observable<SkyBreakpoint>;
    /**
     * The size for the `xs` breakpoint.
     * @default "(max-width: 767px)"
     */
    static xs: string;
    /**
     * The size for the `sm` breakpoint.
     * @default "(min-width: 768px) and (max-width: 991px)"
     */
    static sm: string;
    /**
     * The size for the `md` breakpoint.
     * @default "(min-width: 992px) and (max-width: 1199px)"
     */
    static md: string;
    /**
     * The size for the `lg` breakpoint.
     * @default "(min-width: 1200px)"
     */
    static lg: string;
    /**
     * Returns the current breakpoint.
     * @deprecated Subscribe to the `breakpointChange` observable instead.
     */
    get current(): SkyMediaBreakpoints;
    constructor(_zone?: NgZone);
    ngOnDestroy(): void;
    /**
     * @internal
     */
    destroy(): void;
    /**
     * Subscribes to screen size changes.
     * @param listener Specifies a function that is called when breakpoints change.
     * @deprecated Subscribe to the `breakpointChange` observable instead.
     */
    subscribe(listener: SkyMediaQueryListener): Subscription;
    static ɵfac: i0.ɵɵFactoryDeclaration<SkyMediaQueryService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SkyMediaQueryService>;
}