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/*
* Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
import {
EMPTY,
Observable,
Subject,
defer,
finalize,
fromEvent,
map,
tap
} from "rxjs"
import { feature } from "~/_"
import { getElement } from "~/browser"
import { Component } from "../_"
/* ----------------------------------------------------------------------------
* Types
* ------------------------------------------------------------------------- */
/**
* Announcement bar
*/
export interface Announce {
hash: number /* Content hash */
}
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Watch announcement bar
*
* @param el - Announcement bar element
*
* @returns Announcement bar observable
*/
export function watchAnnounce(
el: HTMLElement
): Observable<Announce> {
const button = getElement(".md-typeset > :first-child", el)
return fromEvent(button, "click", { once: true })
.pipe(
map(() => getElement(".md-typeset", el)),
map(content => ({ hash: __md_hash(content.innerHTML) }))
)
}
/**
* Mount announcement bar
*
* @param el - Announcement bar element
*
* @returns Announcement bar component observable
*/
export function mountAnnounce(
el: HTMLElement
): Observable<Component<Announce>> {
if (!feature("announce.dismiss") || !el.childElementCount)
return EMPTY
/* Support instant navigation - see https://t.ly/3FTme */
if (!el.hidden) {
const content = getElement(".md-typeset", el)
if (__md_hash(content.innerHTML) === __md_get("__announce"))
el.hidden = true
}
/* Mount component on subscription */
return defer(() => {
const push$ = new Subject<Announce>()
push$.subscribe(({ hash }) => {
el.hidden = true
/* Persist preference in local storage */
__md_set<number>("__announce", hash)
})
/* Create and return component */
return watchAnnounce(el)
.pipe(
tap(state => push$.next(state)),
finalize(() => push$.complete()),
map(state => ({ ref: el, ...state }))
)
})
}
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