| /** |
| * @license |
| * Copyright Google LLC All Rights Reserved. |
| * |
| * Use of this source code is governed by an MIT-style license that can be |
| * found in the LICENSE file at https://angular.io/license |
| */ |
| import { NgZone, OnDestroy } from '@angular/core'; |
| import { MediaMatcher } from './media-matcher'; |
| import { Observable } from 'rxjs'; |
| /** The current state of a layout breakpoint. */ |
| export interface BreakpointState { |
| /** Whether the breakpoint is currently matching. */ |
| matches: boolean; |
| /** |
| * A key boolean pair for each query provided to the observe method, |
| * with its current matched state. |
| */ |
| breakpoints: { |
| [key: string]: boolean; |
| }; |
| } |
| /** Utility for checking the matching state of @media queries. */ |
| export declare class BreakpointObserver implements OnDestroy { |
| private _mediaMatcher; |
| private _zone; |
| /** A map of all media queries currently being listened for. */ |
| private _queries; |
| /** A subject for all other observables to takeUntil based on. */ |
| private _destroySubject; |
| constructor(_mediaMatcher: MediaMatcher, _zone: NgZone); |
| /** Completes the active subject, signalling to all other observables to complete. */ |
| ngOnDestroy(): void; |
| /** |
| * Whether one or more media queries match the current viewport size. |
| * @param value One or more media queries to check. |
| * @returns Whether any of the media queries match. |
| */ |
| isMatched(value: string | string[]): boolean; |
| /** |
| * Gets an observable of results for the given queries that will emit new results for any changes |
| * in matching of the given queries. |
| * @param value One or more media queries to check. |
| * @returns A stream of matches for the given queries. |
| */ |
| observe(value: string | string[]): Observable<BreakpointState>; |
| /** Registers a specific query to be listened for. */ |
| private _registerQuery; |
| } |