import { NgZone, OnDestroy } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';
import { MediaChange } from '../media-change';
import * as i0 from "@angular/core";
export declare class MatchMedia implements OnDestroy {
    protected _zone: NgZone;
    protected _platformId: Object;
    protected _document: any;
    readonly source: BehaviorSubject<MediaChange>;
    registry: Map<string, MediaQueryList>;
    private readonly pendingRemoveListenerFns;
    constructor(_zone: NgZone, _platformId: Object, _document: any);
    /**
       * Publish list of all current activations
       */
    get activations(): string[];
    /**
     * For the specified mediaQuery?
     */
    isActive(mediaQuery: string): boolean;
    /**
     * External observers can watch for all (or a specific) mql changes.
     *
     * If a mediaQuery is not specified, then ALL mediaQuery activations will
     * be announced.
     */
    observe(): Observable<MediaChange>;
    observe(mediaQueries: string[]): Observable<MediaChange>;
    observe(mediaQueries: string[], filterOthers: boolean): Observable<MediaChange>;
    /**
     * Based on the BreakPointRegistry provider, register internal listeners for each unique
     * mediaQuery. Each listener emits specific MediaChange data to observers
     */
    registerQuery(mediaQuery: string | string[]): MediaChange[];
    ngOnDestroy(): void;
    /**
     * Call window.matchMedia() to build a MediaQueryList; which
     * supports 0..n listeners for activation/deactivation
     */
    protected buildMQL(query: string): MediaQueryList;
    protected _observable$: Observable<MediaChange>;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatchMedia, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<MatchMedia>;
}