mirror of
https://github.com/squidfunk/mkdocs-material.git
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96 lines
2.7 KiB
TypeScript
96 lines
2.7 KiB
TypeScript
/*
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* Copyright (c) 2016-2025 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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EMPTY,
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Observable,
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fromEvent,
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fromEventPattern,
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map,
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merge,
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startWith,
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switchMap
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} from "rxjs"
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/* ----------------------------------------------------------------------------
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* Functions
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* ------------------------------------------------------------------------- */
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/**
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* Watch media query
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*
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* Note that although `MediaQueryList.addListener` is deprecated we have to
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* use it, because it's the only way to ensure proper downward compatibility.
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*
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* @see https://bit.ly/3dUBH2m - GitHub issue
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*
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* @param query - Media query
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*
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* @returns Media observable
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*/
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export function watchMedia(query: string): Observable<boolean> {
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const media = 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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)
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}
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/**
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* Watch print mode
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*
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* @returns Print observable
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*/
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export function watchPrint(): Observable<boolean> {
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const media = matchMedia("print")
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return merge(
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fromEvent(window, "beforeprint").pipe(map(() => true)),
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fromEvent(window, "afterprint").pipe(map(() => false))
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)
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.pipe(
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startWith(media.matches)
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)
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}
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/* ------------------------------------------------------------------------- */
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/**
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* Toggle an observable with a media observable
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*
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* @template T - Data type
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*
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* @param query$ - Media observable
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* @param factory - Observable factory
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*
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* @returns Toggled observable
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*/
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export function at<T>(
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query$: Observable<boolean>, factory: () => Observable<T>
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): Observable<T> {
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return query$
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.pipe(
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switchMap(active => active ? factory() : EMPTY)
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)
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}
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