AMQ Dynamic Background

Set the currently playing video surface as the background image.
当前为 2023-02-10 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name            AMQ Dynamic Background
// @namespace       https://github.com/SlashNephy
// @version         0.3.0
// @author          SlashNephy
// @description     Set the currently playing video surface as the background image.
// @description:ja  現在再生中の動画を背景画像に設定します。
// @homepage        https://scrapbox.io/slashnephy/AMQ_%E3%81%AE%E8%83%8C%E6%99%AF%E3%81%AB%E5%8B%95%E7%94%BB%E3%82%92%E6%B5%81%E3%81%99_UserScript
// @homepageURL     https://scrapbox.io/slashnephy/AMQ_%E3%81%AE%E8%83%8C%E6%99%AF%E3%81%AB%E5%8B%95%E7%94%BB%E3%82%92%E6%B5%81%E3%81%99_UserScript
// @icon            https://animemusicquiz.com/favicon-32x32.png
// @supportURL      https://github.com/SlashNephy/.github/issues
// @match           https://animemusicquiz.com/*
// @require         https://cdn.jsdelivr.net/gh/TheJoseph98/AMQ-Scripts@b97377730c4e8553d2dcdda7fba00f6e83d5a18a/common/amqScriptInfo.js
// @grant           unsafeWindow
// @license         MIT license
// ==/UserScript==

const awaitFor = async (predicate, timeout) => {
  return new Promise((resolve, reject) => {
    let timer
    const interval = window.setInterval(() => {
      if (predicate()) {
        clearInterval(interval)
        clearTimeout(timer)
        resolve()
      }
    }, 500)
    if (timeout !== undefined) {
      timer = setTimeout(() => {
        clearInterval(interval)
        clearTimeout(timer)
        reject(new Error('timeout'))
      }, timeout)
    }
  })
}

const onReady = (callback) => {
  if (document.getElementById('startPage')) {
    return
  }
  awaitFor(() => document.getElementById('loadingScreen')?.classList.contains('hidden') === true)
    .then(callback)
    .catch(console.error)
}

onReady(() => {
  const video = document.createElement('video')
  video.id = 'dynamic-background-video'
  video.muted = true
  video.loop = true
  const container = document.getElementById('quizPage') ?? document.body
  container.insertAdjacentElement('afterbegin', video)
  new Listener('answer results', () => {
    const quizPlayer = unsafeWindow.quizVideoController.getCurrentPlayer()
    if (quizPlayer === undefined) {
      return
    }
    if (quizPlayer.player.isAudio()) {
      return
    }
    const quizVideo = quizPlayer.$player[0]
    if (video.src !== quizVideo.src) {
      video.src = quizVideo.src
      video.currentTime = quizVideo.currentTime
      void video.play()
    }
  }).bindListener()
  AMQ_addStyle(`
    #dynamic-background-video {
      position: fixed;
      top: 0;
      left: 0;
      height: 100%;
      width: 100%;
      object-fit: cover;
    }
  `)
  AMQ_addScriptData({
    name: 'Dynamic Background',
    author: 'SlashNephy &lt;[email protected]&gt;',
    description: 'Set the currently playing video surface as the background image.',
  })
})
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