mirror of
https://github.com/squidfunk/mkdocs-material.git
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73 lines
2.3 KiB
TypeScript
73 lines
2.3 KiB
TypeScript
/*
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* Copyright (c) 2016-2019 Martin Donath <martin.donath@squidfunk.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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import {
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Observable,
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OperatorFunction,
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fromEventPattern
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} from "rxjs"
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import {
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filter,
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shareReplay,
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startWith,
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windowToggle
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} from "rxjs/operators"
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/* ----------------------------------------------------------------------------
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* Functions
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* ------------------------------------------------------------------------- */
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/**
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* Create an observable for a media query
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*
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* @param query - Media query
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*
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* @return Media query observable
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*/
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export function fromMediaQuery(query: string): Observable<boolean> {
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const media = window.matchMedia(query)
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return fromEventPattern<boolean>(next =>
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media.addListener(() => next(media.matches))
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)
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.pipe(
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startWith(media.matches),
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shareReplay(1)
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)
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}
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/**
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* Only emit values from the source observable when a media query matches
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*
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* @template T - Observable value type
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*
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* @param query - Media query observable
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*
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* @return Observable of source observable values
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*/
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export function withMediaQuery<T>(
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query$: Observable<boolean>
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): OperatorFunction<T, Observable<T>> {
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const start$ = query$.pipe(filter(match => match === true))
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const until$ = query$.pipe(filter(match => match === false))
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return windowToggle<T, boolean>(start$, () => until$)
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}
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