import { NgZone } from '@angular/core';
import { Observable } from 'rxjs';
import { KitPlatformService } from '../kit-platform/kit-platform.service';
import { KitMqParams } from './meta';
/**
 * Check or observe media query.
 *
 * ### Usage
 *
 * Provide breakpoints in the root module:
 *
 * ```typescript
 * ...
 * providers: [
 *   {
 *     provide: kitMqBreakpoints,
 *     useValue: {
 *       mobile: '320px',
 *       tablet: '740px',
 *       desktop: '980px',
 *       wide: '1300px',
 *     },
 *   },
 * ],
 * ```
 *
 * Set of breakpoint is a fully customizable.
 *
 * Use the service:
 *
 * ```typescript
 * constructor(private mq: KitMqService) {
 * }
 * ...
 * // Check
 * const matches = this.mq.check({from: 'mobile', until: 'tablet'});
 * ...
 * // Observe
 * this.mq.observe({from: 'tablet'}).subscribe(matches => {
 * });
 * ```
 *
 * @todo remove mq observer on destroy
 */
export declare class KitMqService {
    private platform;
    private zone;
    private breakpoints;
    private matchMedia;
    private mqs;
    constructor(platform: KitPlatformService, zone: NgZone, breakpoints: any);
    check(params: KitMqParams): boolean | null;
    checkRaw(mediaQuery: string): boolean | null;
    observe(params: KitMqParams): Observable<boolean | null>;
    observeRaw(mediaQuery: string): Observable<boolean | null>;
    private buildQuery;
    private concatQuery;
    private getMq;
}