☰

YouTube ProgressBar Preserver

让你恒常地显示油管上的进度条(显示播放时间比例的红色条)。

当前为 2020-04-18 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        YouTube ProgressBar Preserver
  3. // @name:ja     YouTube ProgressBar Preserver
  4. // @name:zh-CN  YouTube ProgressBar Preserver
  5. // @description It preserves YouTube's progress bar always visible even if the controls are hidden.
  6. // @description:ja YouTubeのプログレスバー(再生時刻の割合を示す赤いバー)を、隠さず常に表示させるようにします。
  7. // @description:zh-CN 让你恒常地显示油管上的进度条(显示播放时间比例的红色条)。
  8. // @namespace   knoa.jp
  9. // @include     https://www.youtube.com/*
  10. // @include     https://www.youtube-nocookie.com/embed/*
  11. // @version     0.13.0
  12. // @grant       none
  13. // ==/UserScript==
  14.  
  15. (function(){
  16.   const SCRIPTID = 'YouTubeProgressBarPreserver';
  17.   const SCRIPTNAME = 'YouTube ProgressBar Preserver';
  18.   const DEBUG = false;/*
  19. [update] 0.13.0
  20. Highlight the buffered range, like YouTube's default.
  21.  
  22. [bug]
  23. 一度ビデオが終わって(次の動画に進んで?)から戻ると更新されない？
  24.  
  25. [todo]
  26. カスタマイズ
  27.   表示対象
  28.     通常時
  29.     フルスクリーン時
  30.     外部埋め込み時
  31.   表示形式
  32.     色 ←赤でいいのでは
  33.     高さ ←必要？
  34.     透明度
  35.   バー用の領域を別途確保する(動画を隠さない) ←ほんとに必要？
  36.     通常時
  37.     フルスクリーン時
  38.   時刻表示
  39.     透明度
  40.     位置 ←固定でいいか
  41.     色 ←白(+影)に固定でいいよね
  42.  
  43. [research]
  44. timeupdateの間隔ぶんだけ遅れてしまうのはうまく改善できるかどうか
  45. timeupdateきっかけで250msをキープするような仕組みでいける？
  46. もっとも、時間の短い広告時くらいしか知覚できないけど。
  47.  
  48. [memo]
  49. YouTubeによって隠されているときはオリジナルのバーは更新されないので、独自に作るほうがラク。
  50. 0.9完成後、youtube progressbar で検索したところすでに存在していることを発見＼(^o^)／
  51. https://addons.mozilla.org/ja/firefox/addon/progress-bar-for-youtube/
  52. カスタマイズできるが、生放送に対応していない。プログレスが最低0.5秒単位でtransitionもない。
  53.   */
  54.   if(window === top && console.time) console.time(SCRIPTID);
  55.   const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
  56.   const INTERVAL = 1*SECOND;/*for core.checkUrl*/
  57.   const SHORTDURATION = 4*MINUTE / 1000;/*short video should have transition*/
  58.   const STARTSWITH = [/*for core.checkUrl*/
  59.     'https://www.youtube.com/watch?',
  60.     'https://www.youtube.com/embed/',
  61.     'https://www.youtube-nocookie.com/embed/',
  62.   ];
  63.   const RETRY = 10;
  64.   let site = {
  65.     targets: {
  66.       player: () => $('.html5-video-player'),
  67.       video: () => $('video[src]'),
  68.       time: () => $('.ytp-time-display'),
  69.     },
  70.     is: {
  71.       live: (time) => time.classList.contains('ytp-live'),
  72.     },
  73.   };
  74.   let elements = {}, timers = {};
  75.   let core = {
  76.     initialize: function(){
  77.       elements.html = document.documentElement;
  78.       elements.html.classList.add(SCRIPTID);
  79.       core.checkUrl();
  80.       core.addStyle();
  81.     },
  82.     checkUrl: function(){
  83.       let previousUrl = '';
  84.       timers.checkUrl = setInterval(function(){
  85.         if(document.hidden) return;
  86.         /* The page is visible, so... */
  87.         if(location.href === previousUrl) return;
  88.         else previousUrl = location.href;
  89.         /* The URL has changed, so... */
  90.         if(STARTSWITH.some(url => location.href.startsWith(url)) === false) return;
  91.         /* This page should be modified, so... */
  92.         core.ready();
  93.       }, INTERVAL);
  94.     },
  95.     ready: function(){
  96.       core.getTargets(site.targets, RETRY).then(() => {
  97.         log("I'm ready.");
  98.         core.appendBar();
  99.       });
  100.     },
  101.     appendBar: function(){
  102.       if(elements.bar && elements.bar.isConnected) return;
  103.       let bar = elements.bar = createElement(html.bar());
  104.       let progress = elements.progress = bar.firstElementChild;
  105.       let buffer = elements.buffer = bar.lastElementChild;
  106.       elements.player.appendChild(bar);
  107.       core.observeTime(elements.time, bar);
  108.       core.observeVideo(elements.video, progress, buffer);
  109.     },
  110.     observeTime: function(time, bar){
  111.       /* detect live for hiding the bar */
  112.       let detect = function(time, bar){
  113.         if(site.is.live(time)) bar.classList.remove('active');
  114.         else bar.classList.add('active');
  115.       };
  116.       detect(time, bar);
  117.       let observer = observe(time, function(records){
  118.         detect(time, bar);
  119.       }, {attributes: true});
  120.     },
  121.     observeVideo: function(video, progress, buffer){
  122.       if(video.duration < SHORTDURATION) progress.classList.add('transition');
  123.       progress.style.transform = 'scaleX(0)';
  124.       video.addEventListener('durationchange', function(e){
  125.         if(video.duration < SHORTDURATION) progress.classList.add('transition');
  126.         else progress.classList.remove('transition');
  127.       });
  128.       video.addEventListener('timeupdate', function(e){
  129.         progress.style.transform = `scaleX(${video.currentTime / video.duration})`;
  130.       });
  131.       video.addEventListener('progress', function(e){
  132.         for(let i = video.buffered.length - 1; 0 <= i; i--){
  133.           if(video.currentTime < video.buffered.start(i)) continue;
  134.           buffer.style.transform = `scaleX(${video.buffered.end(i) / video.duration})`;
  135.           break;
  136.         }
  137.       });
  138.       video.addEventListener('seeking', function(e){
  139.         buffer.style.transform = `scaleX(0)`;
  140.       });
  141.     },
  142.     getTargets: function(targets, retry = 0){
  143.       const get = function(resolve, reject, retry){
  144.         for(let i = 0, keys = Object.keys(targets), key; key = keys[i]; i++){
  145.           let selected = targets[key]();
  146.           if(selected){
  147.             if(selected.length) selected.forEach((s) => s.dataset.selector = key);
  148.             else selected.dataset.selector = key;
  149.             elements[key] = selected;
  150.           }else{
  151.             if(--retry < 0) return reject(log(`Not found: ${key}, I give up.`));
  152.             log(`Not found: ${key}, retrying... (left ${retry})`);
  153.             return setTimeout(get, 1000, resolve, reject, retry);
  154.           }
  155.         }
  156.         resolve();
  157.       };
  158.       return new Promise(function(resolve, reject){
  159.         get(resolve, reject, retry);
  160.       });
  161.     },
  162.     addStyle: function(name = 'style'){
  163.       if(html[name] === undefined) return;
  164.       let style = createElement(html[name]());
  165.       document.head.appendChild(style);
  166.       if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
  167.       elements[name] = style;
  168.     },
  169.   };
  170.   const html = {
  171.     bar: () => `<div id="${SCRIPTID}-bar"><div id="${SCRIPTID}-progress"></div><div id="${SCRIPTID}-buffer"></div></div>`,
  172.     style: () => `
  173.       <style type="text/css">
  174.         /* bar */
  175.         #${SCRIPTID}-bar{
  176.           --height: 3px;
  177.           --background: rgba(255,255,255,.2);
  178.           --color: #f00;
  179.           --ad-color: #fc0;
  180.           --buffer-color: rgba(255,255,255,.4);
  181.           --transition-bar: opacity .25s cubic-bezier(0.0,0.0,0.2,1);
  182.           --transition-progress: transform .25s linear;
  183.           --z-index: 100;
  184.         }
  185.         #${SCRIPTID}-bar{
  186.           width: 100%;
  187.           height: var(--height);
  188.           background: var(--background);
  189.           position: absolute;
  190.           bottom: 0;
  191.           transition: var(--transition-bar);
  192.           opacity: 0;
  193.           z-index: var(--z-index);
  194.         }
  195.         #${SCRIPTID}-progress,
  196.         #${SCRIPTID}-buffer{
  197.           width: 100%;
  198.           height: var(--height);
  199.           transform-origin: 0 0;
  200.           position: absolute;
  201.         }
  202.         #${SCRIPTID}-progress.transition,
  203.         #${SCRIPTID}-buffer{
  204.           transition: var(--transition-progress);
  205.         }
  206.         #${SCRIPTID}-progress{
  207.           background: var(--color);
  208.           z-index: 1;
  209.         }
  210.         #${SCRIPTID}-buffer{
  211.           background: var(--buffer-color);
  212.         }
  213.         .ad-interrupting/*advertisement*/ #${SCRIPTID}-progress{
  214.           background: var(--ad-color);
  215.         }
  216.         /* replace the bar */
  217.         .ytp-autohide #${SCRIPTID}-bar.active{
  218.           opacity: 1;
  219.         }
  220.         /* replace the bar for an ad */
  221.         .ytp-ad-persistent-progress-bar-container/*YouTube offers progress bar only when an ad is showing, but it doesn't have transition animation*/{
  222.           display: none
  223.         }
  224.       </style>
  225.     `,
  226.   };
  227.   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);
  228.   const alert = window.alert.bind(window), confirm = window.confirm.bind(window), getComputedStyle = window.getComputedStyle.bind(window), fetch = window.fetch.bind(window);
  229.   if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  230.   class Storage{
  231.     static key(key){
  232.       return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
  233.     }
  234.     static save(key, value, expire = null){
  235.       key = Storage.key(key);
  236.       localStorage[key] = JSON.stringify({
  237.         value: value,
  238.         saved: Date.now(),
  239.         expire: expire,
  240.       });
  241.     }
  242.     static read(key){
  243.       key = Storage.key(key);
  244.       if(localStorage[key] === undefined) return undefined;
  245.       let data = JSON.parse(localStorage[key]);
  246.       if(data.value === undefined) return data;
  247.       if(data.expire === undefined) return data;
  248.       if(data.expire === null) return data.value;
  249.       if(data.expire < Date.now()) return localStorage.removeItem(key);
  250.       return data.value;
  251.     }
  252.     static delete(key){
  253.       key = Storage.key(key);
  254.       delete localStorage.removeItem(key);
  255.     }
  256.     static saved(key){
  257.       key = Storage.key(key);
  258.       if(localStorage[key] === undefined) return undefined;
  259.       let data = JSON.parse(localStorage[key]);
  260.       if(data.saved) return data.saved;
  261.       else return undefined;
  262.     }
  263.   }
  264.   const $ = function(s, f){
  265.     let target = document.querySelector(s);
  266.     if(target === null) return null;
  267.     return f ? f(target) : target;
  268.   };
  269.   const $$ = function(s, f){
  270.     let targets = document.querySelectorAll(s);
  271.     return f ? Array.from(targets).map(t => f(t)) : targets;
  272.   };
  273.   const createElement = function(html = '<span></span>'){
  274.     let outer = document.createElement('div');
  275.     outer.innerHTML = html;
  276.     return outer.firstElementChild;
  277.   };
  278.   const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
  279.     let observer = new MutationObserver(callback.bind(element));
  280.     observer.observe(element, options);
  281.     return observer;
  282.   };
  283.   const log = function(){
  284.     if(!DEBUG) return;
  285.     let l = log.last = log.now || new Date(), n = log.now = new Date();
  286.     let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
  287.     //console.log(error.stack);
  288.     console.log(
  289.       (SCRIPTID || '') + ':',
  290.       /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
  291.       /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
  292.       /* :00           */ ':' + line,
  293.       /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
  294.       /* caller        */ (callers[1] || '') + '()',
  295.       ...arguments
  296.     );
  297.   };
  298.   log.formats = [{
  299.       name: 'Firefox Scratchpad',
  300.       detector: /MARKER@Scratchpad/,
  301.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  302.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  303.     }, {
  304.       name: 'Firefox Console',
  305.       detector: /MARKER@debugger/,
  306.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  307.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  308.     }, {
  309.       name: 'Firefox Greasemonkey 3',
  310.       detector: /\/gm_scripts\//,
  311.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  312.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  313.     }, {
  314.       name: 'Firefox Greasemonkey 4+',
  315.       detector: /MARKER@user-script:/,
  316.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
  317.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  318.     }, {
  319.       name: 'Firefox Tampermonkey',
  320.       detector: /MARKER@moz-extension:/,
  321.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
  322.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  323.     }, {
  324.       name: 'Chrome Console',
  325.       detector: /at MARKER \(<anonymous>/,
  326.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  327.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
  328.     }, {
  329.       name: 'Chrome Tampermonkey',
  330.       detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?id=/,
  331.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 6,
  332.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  333.     }, {
  334.       name: 'Chrome Extension',
  335.       detector: /at MARKER \(chrome-extension:/,
  336.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  337.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  338.     }, {
  339.       name: 'Edge Console',
  340.       detector: /at MARKER \(eval/,
  341.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
  342.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
  343.     }, {
  344.       name: 'Edge Tampermonkey',
  345.       detector: /at MARKER \(Function/,
  346.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
  347.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
  348.     }, {
  349.       name: 'Safari',
  350.       detector: /^MARKER$/m,
  351.       getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
  352.       getCallers: (e) => e.stack.split('\n'),
  353.     }, {
  354.       name: 'Default',
  355.       detector: /./,
  356.       getLine: (e) => 0,
  357.       getCallers: (e) => [],
  358.     }];
  359.   log.format = log.formats.find(function MARKER(f){
  360.     if(!f.detector.test(new Error().stack)) return false;
  361.     //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
  362.     return true;
  363.   });
  364.   const time = function(label){
  365.     if(!DEBUG) return;
  366.     const BAR = '|', TOTAL = 100;
  367.     switch(true){
  368.       case(label === undefined):/* time() to output total */
  369.         let total = 0;
  370.         Object.keys(time.records).forEach((label) => total += time.records[label].total);
  371.         Object.keys(time.records).forEach((label) => {
  372.           console.log(
  373.             BAR.repeat((time.records[label].total / total) * TOTAL),
  374.             label + ':',
  375.             (time.records[label].total).toFixed(3) + 'ms',
  376.             '(' + time.records[label].count + ')',
  377.           );
  378.         });
  379.         time.records = {};
  380.         break;
  381.       case(!time.records[label]):/* time('label') to create and start the record */
  382.         time.records[label] = {count: 0, from: performance.now(), total: 0};
  383.         break;
  384.       case(time.records[label].from === null):/* time('label') to re-start the lap */
  385.         time.records[label].from = performance.now();
  386.         break;
  387.       case(0 < time.records[label].from):/* time('label') to add lap time to the record */
  388.         time.records[label].total += performance.now() - time.records[label].from;
  389.         time.records[label].from = null;
  390.         time.records[label].count += 1;
  391.         break;
  392.     }
  393.   };
  394.   time.records = {};
  395.   core.initialize();
  396.   if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
  397. })();