YouTube Live Filled Up View

Get maximized video-and-chat view with no margins on YouTube Live or Premieres.

As of 17. 06. 2020. See the latest version.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        YouTube Live Filled Up View
// @name:ja     YouTube Live Filled Up View
// @name:zh-CN  YouTube Live Filled Up View
// @description Get maximized video-and-chat view with no margins on YouTube Live or Premieres.
// @description:ja YouTube Live やプレミア公開のチャット付きビューで、余白を切り詰めて映像を最大化します。
// @description:zh-CN 在油管中的 YouTube Live 或首映公开的带聊天视图中,截取空白以最大化映像。
// @namespace   knoa.jp
// @include     https://www.youtube.com/*
// @version     1.2.1
// @grant       none
// ==/UserScript==

(function(){
  const SCRIPTID = 'YouTubeLiveFilledUpView';
  const SCRIPTNAME = 'YouTube Live Filled Up View';
  const DEBUG = false;/*
[update] 1.2.1
Fix for LIVEs started from waiting state.

[bug]
live待機でflextサイズ計算おかしい

[todo]

[possible]

[research]
infoの高さが変わりうるwindow.onresizeに対応か(パフォーマンスはスロットルすれば平気か)

[memo]
ダークモードはそれ用のユーザースタイルに任せるべき。
YouTubeのヘッダが常時表示なのはちょっと気にかかるが、高さにはまだ余裕がある。
  横幅1920時のinnerHeight: 910px, ChromeのUI: 約100px, Windowsタスクバー: 約40px
  */
  if(window === top && console.time) console.time(SCRIPTID);
  const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
  const INTERVAL = 1*SECOND;/*for core.checkUrl*/
  const DEFAULTRATIO = 9/16;/*for waiting page*/
  const VIDEOURLS = [/*for core.checkUrl*/
    /^https:\/\/www\.youtube\.com\/watch\?/,
    /^https:\/\/www\.youtube\.com\/channel\/[^/]+\/live/,
  ];
  const CHATURLS = [/*for core.checkUrl*/
    /^https:\/\/www\.youtube\.com\/live_chat\?/,
    /^https:\/\/www\.youtube\.com\/live_chat_replay\?/,
  ];
  let site = {
    videoTargets: {
      watchFlexy: () => $('ytd-watch-flexy'),
      video: () => $('#movie_player video'),
      info: () => $('ytd-video-primary-info-renderer'),
      chat: () => $('ytd-live-chat-frame#chat'),
    },
    is: {
      video: () => VIDEOURLS.some(url => url.test(location.href)),
      chat: () => CHATURLS.some(url => url.test(location.href)),
      opened: (chat) => (chat.isConnected === true && chat.collapsed === false),
      theater: () => elements.watchFlexy.theater,/* YouTube uses this property */
    },
    get: {
      sizeButton: () => $('button.ytp-size-button'),
    },
    chatTargets: {
      items: () => $('yt-live-chat-item-list-renderer #items'),
    },
  };
  let elements = {}, timers = {}, sizes = {};
  let core = {
    initialize: function(){
      elements.html = document.documentElement;
      elements.html.classList.add(SCRIPTID);
      if(site.is.chat()){
        core.readyForChat();
      }else{
        core.checkUrl();
        core.addStyle('videoDefaultStyle');
      }
    },
    checkUrl: function(){
      let previousUrl = '';
      timers.checkUrl = setInterval(function(){
        if(document.hidden) return;
        /* The page is visible, so... */
        if(location.href === previousUrl) return;
        else previousUrl = location.href;
        /* The URL has changed, so... */
        core.clearVideoStyle();
        if(site.is.video()) return core.readyForVideo();
      }, INTERVAL);
    },
    clearVideoStyle: function(){
      if(elements.videoStyle && elements.videoStyle.isConnected){
        document.head.removeChild(elements.videoStyle);
      }
    },
    addVideoStyle: function(e){
      if(site.is.opened(chat) === false) return;
      /* it also replaces old style */
      let video = elements.video;
      /* adapt to the aspect ratio  */
      if(video.videoWidth){
        sizes.videoAspectRatio = video.videoHeight / video.videoWidth;
        core.addStyle('videoStyle');
      }else{
        sizes.videoAspectRatio = DEFAULTRATIO;
        core.addStyle('videoStyle');
        video.addEventListener('canplay', core.addVideoStyle, {once: true});
      }
      /* for Ads replacing */
      if(video.dataset.observed === 'true') return;
      video.dataset.observed = 'true';
      observe(video, function(records){
        video.addEventListener('canplay', core.addVideoStyle, {once: true});
      }, {attributes: true, attributeFilter: ['src']});
    },
    readyForVideo: function(){
      core.getTargets(site.videoTargets).then(() => {
        log("I'm ready for Video with Chat.");
        sizes.scrollbarWidth = getScrollbarWidth();
        core.getInfoHeight();
        core.replacePlayerSize();
        core.observeChatFrame();
        core.enterDefaultMode();
      }).catch(e => {
        console.error(`${SCRIPTID}:${e.lineNumber} ${e.name}: ${e.message}`);
      });
    },
    getInfoHeight: function(){
      let info = elements.info;
      if(info.offsetHeight === 0) return setTimeout(core.getInfoHeight, 1000);
      sizes.infoHeight = elements.info.offsetHeight;
    },
    replacePlayerSize: function(){
      /* update the size */
      setTimeout(() => window.dispatchEvent(new Event('resize')), 1000);
      let watchFlexy = elements.watchFlexy;
      if(watchFlexy.calculateNormalPlayerSize_original) return;
      /* Thanks for Iridium.user.js > initializeBypasses */
      watchFlexy.calculateNormalPlayerSize_original = watchFlexy.calculateNormalPlayerSize_;
      watchFlexy.calculateCurrentPlayerSize_original = watchFlexy.calculateCurrentPlayerSize_;
      watchFlexy.calculateNormalPlayerSize_ = watchFlexy.calculateCurrentPlayerSize_ = function(){
        let video = elements.video, chat = elements.chat;
        if(site.is.opened(chat) === false){/* chat is closed */
          return watchFlexy.calculateCurrentPlayerSize_original();
        }else{
          if(watchFlexy.theater) return {width: NaN, height: NaN};
          else return {width: video.offsetWidth, height: video.offsetHeight};
        }
      };
    },
    observeChatFrame: function(){
      let chat = elements.chat, isOpened = site.is.opened(chat);
      if(isOpened) core.addVideoStyle();
      observe(chat, function(records){
        if(site.is.opened(chat) === isOpened) return;
        isOpened = !isOpened;
        window.dispatchEvent(new Event('resize'));/*for updating controls tooltip positions*/
        if(isOpened) return core.addVideoStyle();
        else return core.clearVideoStyle();
      }, {attributes: true});
    },
    enterDefaultMode: function(){
      if(site.is.theater() === false) return;/* already in default mode */
      let sizeButton = site.get.sizeButton();
      if(sizeButton) sizeButton.click();
    },
    readyForChat: function(){
      core.getTargets(site.chatTargets).then(() => {
        log("I'm ready for Chat.");
        core.addStyle('chatStyle');
      }).catch(e => {
        console.error(`${SCRIPTID}:${e.lineNumber} ${e.name}: ${e.message}`);
      });
    },
    getTarget: function(selector, retry = 10, interval = 1*SECOND){
      const key = selector.name;
      const get = function(resolve, reject){
        let selected = selector();
        if(selected && selected.length > 0) selected.forEach((s) => s.dataset.selector = key);/* elements */
        else if(selected instanceof HTMLElement) selected.dataset.selector = key;/* element */
        else if(--retry) return log(`Not found: ${key}, retrying... (${retry})`), setTimeout(get, interval, resolve, reject);
        else return reject(new Error(`Not found: ${selector.name}, I give up.`));
        elements[key] = selected;
        resolve(selected);
      };
      return new Promise(function(resolve, reject){
        get(resolve, reject);
      });
    },
    getTargets: function(selectors, retry = 10, interval = 1*SECOND){
      return Promise.all(Object.values(selectors).map(selector => core.getTarget(selector, retry, interval)));
    },
    addStyle: function(name = 'style'){
      if(html[name] === undefined) return;
      let style = createElement(html[name]());
      document.head.appendChild(style);
      if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
      elements[name] = style;
    },
  };
  const html = {
    videoDefaultStyle: () => `
      <style type="text/css" id="${SCRIPTID}-videoDefaultStyle">
        #movie_player .html5-video-container{
          height: 100% !important;
        }
        #movie_player video{
          max-width: 100% !important;
          height: 100% !important;
          x-height: auto !important;
        }
        #movie_player .ytp-chrome-bottom/*controls*/{
          width: calc(100% - 24px) !important;/*fragile!!*/
          max-width: calc(100% - 24px) !important;/*fragile!!*/
        }
        .ended-mode video{
          display: none !important;/*avoid conflicting with Iridium*/
        }
      </style>
    `,
    videoStyle: () => `
      <style type="text/css" id="${SCRIPTID}-videoStyle">
        /* common */
        ytd-watch-flexy{
          --${SCRIPTID}-header-height: var(--ytd-watch-flexy-masthead-height);
          --${SCRIPTID}-info-height: ${sizes.infoHeight}px;
          --ytd-watch-flexy-width-ratio: 1 !important;/*fix for Iridium bug*/
          --ytd-watch-width-ratio: 1 !important;/*fix for Iridium bug*/
          --ytd-watch-flexy-height-ratio: ${sizes.videoAspectRatio} !important;/*fix for Iridium bug*/
          --ytd-watch-height-ratio: ${sizes.videoAspectRatio} !important;/*fix for Iridium bug*/
        }
        ytd-watch-flexy[is-two-columns_]{
          --${SCRIPTID}-primary-width: calc(100vw - ${sizes.scrollbarWidth}px - var(--ytd-watch-flexy-sidebar-width));
          --${SCRIPTID}-secondary-width: var(--ytd-watch-flexy-sidebar-width);
          --${SCRIPTID}-video-height: calc(var(--${SCRIPTID}-primary-width) * ${sizes.videoAspectRatio});
        }
        ytd-watch-flexy:not([is-two-columns_]){
          --${SCRIPTID}-primary-width: 100vw;
          --${SCRIPTID}-secondary-width: 100vw;
          --${SCRIPTID}-video-height: calc(100vw * ${sizes.videoAspectRatio});
        }
        /* columns */
        #columns{
          max-width: 100% !important;
        }
        #primary{
          max-width: var(--${SCRIPTID}-primary-width) !important;
          min-width: var(--${SCRIPTID}-primary-width) !important;
          padding: 0 !important;
          margin: 0 !important;
        }
        #secondary{
          max-width: var(--${SCRIPTID}-secondary-width) !important;
          min-width: var(--${SCRIPTID}-secondary-width) !important;
          padding: 0 !important;
          margin: 0 !important;
        }
        #player-container-outer,
        yt-live-chat-app{
          max-width: 100% !important;
          min-width: 100% !important;
        }
        #primary-inner > *:not(#player){
          padding: 0 24px 0;
        }
        /* video */
        #player,
        #player *{
          max-height: calc(100vh - var(--${SCRIPTID}-header-height)) !important;
        }
        #player video{
          width: 100% !important;
          left: 0px !important;
          background: black;
        }
        /* chatframe */
        ytd-watch-flexy[is-two-columns_] ytd-live-chat-frame#chat{
          height: calc(var(--${SCRIPTID}-video-height) + var(--${SCRIPTID}-info-height)) !important;
          min-height: auto !important;
          max-height: calc(100vh - var(--${SCRIPTID}-header-height)) !important;
          border-right: none;
        }
        ytd-watch-flexy:not([is-two-columns_]) ytd-live-chat-frame#chat{
          padding: 0 !important;
          margin: 0 !important;
          height: calc(100vh - var(--${SCRIPTID}-header-height) - var(--${SCRIPTID}-video-height)) !important;
          min-height: auto !important;
          border-top: none;
        }
      </style>
    `,
    chatStyle: () => `
      <style type="text/css" id="${SCRIPTID}-chatStyle">
        /* common */
        :root{
          --${SCRIPTID}-slight-shadow: drop-shadow(0 0 1px rgba(0,0,0,.1));
        }
        /* header and footer */
        yt-live-chat-header-renderer/*header*/{
          filter: var(--${SCRIPTID}-slight-shadow);
          z-index: 100;
        }
        #contents > #ticker/*superchat*/{
          filter: var(--${SCRIPTID}-slight-shadow);
        }
        #contents > #ticker/*superchat*/ > yt-live-chat-ticker-renderer > #container > *{
          padding-top: 4px;
          padding-bottom: 4px;
        }
        iron-pages#panel-pages/*footer*/{
          filter: var(--${SCRIPTID}-slight-shadow);
          background: white;
        }
        /* body */
        #docked-item.yt-live-chat-docked-message-renderer/*sticky on the top*/,
        #undocking-item.yt-live-chat-docked-message-renderer/*sticky on the top*/{
          margin: 8px 0;
        }
        #docked-item.yt-live-chat-docked-message-renderer/*sticky on the top*/ > *,
        #undocking-item.yt-live-chat-docked-message-renderer/*sticky on the top*/ > *{
          filter: var(--${SCRIPTID}-slight-shadow);
        }
        #docked-item.yt-live-chat-docked-message-renderer/*sticky on the top*/ > *,
        #undocking-item.yt-live-chat-docked-message-renderer/*sticky on the top*/ > *,
        #items.yt-live-chat-item-list-renderer/*normal chats*/ > *:not(yt-live-chat-placeholder-item-renderer){
          padding: 2px 10px !important;
        }
      </style>
    `,
  };
  const setTimeout = window.setTimeout.bind(window), clearTimeout = window.clearTimeout.bind(window), setInterval = window.setInterval.bind(window), clearInterval = window.clearInterval.bind(window), requestAnimationFrame = window.requestAnimationFrame.bind(window);
  const alert = window.alert.bind(window), confirm = window.confirm.bind(window), getComputedStyle = window.getComputedStyle.bind(window), fetch = window.fetch.bind(window);
  if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  class Storage{
    static key(key){
      return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
    }
    static save(key, value, expire = null){
      key = Storage.key(key);
      localStorage[key] = JSON.stringify({
        value: value,
        saved: Date.now(),
        expire: expire,
      });
    }
    static read(key){
      key = Storage.key(key);
      if(localStorage[key] === undefined) return undefined;
      let data = JSON.parse(localStorage[key]);
      if(data.value === undefined) return data;
      if(data.expire === undefined) return data;
      if(data.expire === null) return data.value;
      if(data.expire < Date.now()) return localStorage.removeItem(key);
      return data.value;
    }
    static delete(key){
      key = Storage.key(key);
      delete localStorage.removeItem(key);
    }
    static saved(key){
      key = Storage.key(key);
      if(localStorage[key] === undefined) return undefined;
      let data = JSON.parse(localStorage[key]);
      if(data.saved) return data.saved;
      else return undefined;
    }
  }
  const $ = function(s, f){
    let target = document.querySelector(s);
    if(target === null) return null;
    return f ? f(target) : target;
  };
  const $$ = function(s){return document.querySelectorAll(s)};
  const createElement = function(html = '<span></span>'){
    let outer = document.createElement('div');
    outer.innerHTML = html;
    return outer.firstElementChild;
  };
  const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
    let observer = new MutationObserver(callback.bind(element));
    observer.observe(element, options);
    return observer;
  };
  const getScrollbarWidth = function(){
    let div = document.createElement('div');
    div.textContent = 'dummy';
    document.body.appendChild(div);
    div.style.overflowY = 'scroll';
    let clientWidth = div.clientWidth;
    div.style.overflowY = 'hidden';
    let offsetWidth = div.offsetWidth;
    document.body.removeChild(div);
    return offsetWidth - clientWidth;
  };
  const log = function(){
    if(!DEBUG) return;
    let l = log.last = log.now || new Date(), n = log.now = new Date();
    let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
    //console.log(error.stack);
    console.log(
      (SCRIPTID || '') + ':',
      /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
      /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
      /* :00           */ ':' + line,
      /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
      /* caller        */ (callers[1] || '') + '()',
      ...arguments
    );
  };
  log.formats = [{
      name: 'Firefox Scratchpad',
      detector: /MARKER@Scratchpad/,
      getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
      getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
    }, {
      name: 'Firefox Console',
      detector: /MARKER@debugger/,
      getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
      getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
    }, {
      name: 'Firefox Greasemonkey 3',
      detector: /\/gm_scripts\//,
      getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
      getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
    }, {
      name: 'Firefox Greasemonkey 4+',
      detector: /MARKER@user-script:/,
      getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
      getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
    }, {
      name: 'Firefox Tampermonkey',
      detector: /MARKER@moz-extension:/,
      getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
      getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
    }, {
      name: 'Chrome Console',
      detector: /at MARKER \(<anonymous>/,
      getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
      getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
    }, {
      name: 'Chrome Tampermonkey',
      detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?name=/,
      getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 1,
      getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
    }, {
      name: 'Chrome Extension',
      detector: /at MARKER \(chrome-extension:/,
      getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
      getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
    }, {
      name: 'Edge Console',
      detector: /at MARKER \(eval/,
      getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
      getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
    }, {
      name: 'Edge Tampermonkey',
      detector: /at MARKER \(Function/,
      getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
      getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
    }, {
      name: 'Safari',
      detector: /^MARKER$/m,
      getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
      getCallers: (e) => e.stack.split('\n'),
    }, {
      name: 'Default',
      detector: /./,
      getLine: (e) => 0,
      getCallers: (e) => [],
    }];
  log.format = log.formats.find(function MARKER(f){
    if(!f.detector.test(new Error().stack)) return false;
    //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
    return true;
  });
  const time = function(label){
    if(!DEBUG) return;
    const BAR = '|', TOTAL = 100;
    switch(true){
      case(label === undefined):/* time() to output total */
        let total = 0;
        Object.keys(time.records).forEach((label) => total += time.records[label].total);
        Object.keys(time.records).forEach((label) => {
          console.log(
            BAR.repeat((time.records[label].total / total) * TOTAL),
            label + ':',
            (time.records[label].total).toFixed(3) + 'ms',
            '(' + time.records[label].count + ')',
          );
        });
        time.records = {};
        break;
      case(!time.records[label]):/* time('label') to create and start the record */
        time.records[label] = {count: 0, from: performance.now(), total: 0};
        break;
      case(time.records[label].from === null):/* time('label') to re-start the lap */
        time.records[label].from = performance.now();
        break;
      case(0 < time.records[label].from):/* time('label') to add lap time to the record */
        time.records[label].total += performance.now() - time.records[label].from;
        time.records[label].from = null;
        time.records[label].count += 1;
        break;
    }
  };
  time.records = {};
  core.initialize();
  if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
})();