Youtube Better Player

Scroll wheel volume, "Are you there" popup bypass, Volume percent display, Infinite autoplay, Volume save
当前为 2021-07-30 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Youtube Better Player
// @description  Scroll wheel volume, "Are you there" popup bypass, Volume percent display, Infinite autoplay, Volume save
// @include      /^https:\/\/www\.youtube\.com\/(?!(live_chat\?.*|ytscframe)$).*$/
// @run-at       document-idle
// @allFrames    true
// @grant        GM_addStyle
// @version 0.0.1.20210730180549
// @namespace https://greasyfork.org/users/286737
// ==/UserScript==
 
class Player {
    constructor() {
        this.volumeSk = 'ytbp-volume'
    }
 
    async init(isEmbed) {
        const api = this.api = isEmbed ? unsafeWindow.movie_player : await this.getApi()
 
        this.volume = this.getSavedVolume()
        this.$volumeText = this.buildVolumeText()
 
        const {$video, $eventCatcher, $volumeBar, $player} = this.getEls()
 
        const onVolumeChange = this.onVolumeChange.bind(this)
        $video.addEventListener('volumechange', onVolumeChange)
 
        new WheelVolume(this, api, $volumeBar, $player).init($eventCatcher)
 
        if (!isEmbed) new RealAutoPlay(api).init($video)
    }
 
    async getApi() {
        let $el, api
 
        while (!($el = unsafeWindow['ytd-player'])) await wait(1000)
        while (!(api = $el.player_)) await wait(200)
        while (!api.isReady()) await wait(200)
 
        return api
    }
 
    getSavedVolume() {
        const savedVolume = localStorage.getItem(this.volumeSk)
 
        if (savedVolume == undefined) return Math.floor(this.api.getVolume())
 
        this.api.setVolume(savedVolume)
        return savedVolume
    }
 
    getEls() {
        const $player = $('#movie_player')
        const $video = $('video', $player)
        const $eventCatcher = $player.parentElement
        const $volumeBar = $('.ytp-volume-slider', $player)
 
        return {$video, $eventCatcher, $volumeBar, $player}
    }
 
    buildVolumeText() {
        const $volumeText = document.createElement('span')
        $volumeText.classList.add('ytbp-volume-text')
        $volumeText.textContent = this.volume
        GM_addStyle(volumeTextStyle)
 
        $('.ytp-volume-area').insertAdjacentElement('beforeend', $volumeText)
 
        return $volumeText
    }
 
    onVolumeChange() {
        this.volume = this.$volumeText.textContent = Math.floor(this.api.getVolume())
 
        clearTimeout(this.saveTimeout)
 
        this.saveTimeout = setTimeout(() => localStorage.setItem(this.volumeSk, this.volume), 1000)
    }
}
 
class WheelVolume {
    constructor(player, api, $volumeBar, $player) {
        this.player = player
        this.api = api
        this.$volumeBar = $volumeBar
        this.$player = $player
 
        this.events = {
            mouseover: new Event('mouseover', {bubbles: true}),
            mouseout: new Event('mouseout', {bubbles: true}),
            mousemove: new Event('mousemove')
        }
    }
 
    init($eventCatcher) {
        const onWheel = this.onWheel.bind(this)
        const onClick = this.onClick.bind(this)
 
        $eventCatcher.addEventListener('wheel', onWheel)
        $eventCatcher.addEventListener('mousedown', onClick)
    }
 
    onWheel(e) {
        e.preventDefault()
        e.stopImmediatePropagation()
 
        this.show()
 
        const api = this.api
        const now = Date.now(), since = now - this.prevScrollDate
        const step = (e.deltaY < 0 ? 1 : -1) * (since < 50 ? 4 : 1)
 
        if (api.isMuted()) api.unMute()
 
        api.setVolume(this.player.volume + step)
 
        this.prevScrollDate = now
    }
 
    onClick(e) {
        if (e.which != 2) return
 
        e.preventDefault()
 
        this.show()
 
        const api = this.api
 
        if (api.isMuted()) {
            api.unMute()
            api.setVolume(this.player.volume)
        }
        else api.mute()
    }
 
    show() {
        const $volumeBar = this.$volumeBar, events = this.events
 
        this.$player.dispatchEvent(events.mousemove)
 
        clearTimeout(this.showTimeout)
 
        $volumeBar.dispatchEvent(events.mouseover)
 
        this.showTimeout = setTimeout(() => $volumeBar.dispatchEvent(events.mouseout), 1000)
    }
}
 
class RealAutoPlay {
    constructor(api) {
        this.api = api
 
        this.popupName = 'yt-confirm-dialog-renderer'
        this.popupContainer = $('ytd-popup-container', unsafeWindow.document)
 
        const storedAutoNav = localStorage.getItem('yt.autonav::autonav_disabled')
        this.autoNavEnabled = storedAutoNav ? !JSON.parse(storedAutoNav).data : true
    }
 
    init($video) {
        const bypassPopup = this.bypassPopup.bind(this)
        const forceNextVideo = this.forceNextVideo.bind(this)
        const onToggleAutoNav = this.onToggleAutoNav.bind(this)
 
        $video.addEventListener('pause', bypassPopup)
        $video.addEventListener('waiting', bypassPopup)
        $video.addEventListener('ended', forceNextVideo)
 
        $('.ytp-autonav-toggle-button').addEventListener('click', onToggleAutoNav)
    }
 
    bypassPopup() {
        const popup = this.popupContainer.popups_[this.popupName]
 
        if (!popup) return
 
        this.api.playVideo()
 
        popup.popup.remove()
        delete this.popupContainer.popups_[this.popupName]
    }
 
    forceNextVideo() {
        if (this.autoNavEnabled && !document.hasFocus()) this.api.nextVideo()
    }
 
    onToggleAutoNav() {
        this.autoNavEnabled = !this.autoNavEnabled
    }
}
 
const init = async () => {
    const isEmbed = location.pathname.startsWith('/embed/')
 
    if (isEmbed) await new Promise(r => $('video').addEventListener('canplay', r, {once: true}))
 
    new Player().init(isEmbed)
}
 
const volumeTextStyle = `
.ytbp-volume-text {
    width: 0;
    text-indent: 2px;
    overflow: hidden;
    color: #ddd;
    font-size: 109%;
    line-height: 39px;
    text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
    transition: width .2s;
}
.ytbp-volume-text:after { content: '%'; }
 
.ytp-volume-control-hover:not([aria-valuenow="0"], [aria-valuenow="100"]) + .ytbp-volume-text {
    width: 32px;
}
`
 
const $ = (sel, el = document) => el.querySelector(sel)
 
const wait = (ms) => new Promise(r => setTimeout(r, ms))
 
 
init()