☰

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 2020-04-11 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     0.12.1
  12. // @grant       none
  13. // ==/UserScript==
  14.  
  15. (function(){
  16.   const SCRIPTID = 'YouTubeProgressBarPreserver';
  17.   const SCRIPTNAME = 'YouTube ProgressBar Preserver';
  18.   const DEBUG = false;/*
  19. [update] 0.12.1
  20. Now available on youtube-nocookie.com.
  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(color, height, opacity, 各表示モードでのオンオフ)
  27. うっすら時刻表示オプションほしい？
  28.  
  29. [research]
  30. 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
  31. timeupdateきっかけで250msをキープするような仕組みでいける？
  32. 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。
  33.  
  34. [memo]
  35. 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。
  36. 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^)／
  37. https://addons.mozilla.org/ja/firefox/addon/progress-bar-for-youtube/
  38. カスタマイズできるしロード済みバッファにも対応するが、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。
  39.   */
  40.   if(window === top && console.time) console.time(SCRIPTID);
  41.   const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
  42.   const INTERVAL = 1*SECOND;/*for core.checkUrl*/
  43.   const SHORTDURATION = 4*MINUTE / 1000;/*short video should have transition*/
  44.   const STARTSWITH = [/*for core.checkUrl*/
  45.     'https://www.youtube.com/watch?',
  46.     'https://www.youtube.com/embed/',
  47.     'https://www.youtube-nocookie.com/embed/',
  48.   ];
  49.   const RETRY = 10;
  50.   let site = {
  51.     targets: {
  52.       player: () => $('.html5-video-player'),
  53.       video: () => $('video[src]'),
  54.       time: () => $('.ytp-time-display'),
  55.     },
  56.     is: {
  57.       live: (time) => time.classList.contains('ytp-live'),
  58.     },
  59.   };
  60.   let html, elements = {}, timers = {};
  61.   let core = {
  62.     initialize: function(){
  63.       html = document.documentElement;
  64.       html.classList.add(SCRIPTID);
  65.       core.checkUrl();
  66.       core.addStyle();
  67.     },
  68.     checkUrl: function(){
  69.       let previousUrl = '';
  70.       timers.checkUrl = setInterval(function(){
  71.         if(document.hidden) return;
  72.         /* The page is visible, so... */
  73.         if(location.href === previousUrl) return;
  74.         else previousUrl = location.href;
  75.         /* The URL has changed, so... */
  76.         if(STARTSWITH.some(url => location.href.startsWith(url)) === false) return;
  77.         /* This page should be modified, so... */
  78.         core.ready();
  79.       }, INTERVAL);
  80.     },
  81.     ready: function(){
  82.       core.getTargets(site.targets, RETRY).then(() => {
  83.         log("I'm ready.");
  84.         core.appendBar();
  85.       });
  86.     },
  87.     appendBar: function(){
  88.       if(elements.bar && elements.bar.isConnected) return;
  89.       let bar = elements.bar = createElement(core.html.bar());
  90.       let progress = elements.progress = bar.firstElementChild;
  91.       elements.player.appendChild(bar);
  92.       core.observeTime(elements.time, bar);
  93.       core.observeVideo(elements.video, progress);
  94.     },
  95.     observeTime: function(time, bar){
  96.       let detect = function(time, bar){
  97.         if(site.is.live(time)) bar.classList.remove('active');
  98.         else bar.classList.add('active');
  99.       };
  100.       detect(time, bar);
  101.       let observer = observe(time, function(records){
  102.         detect(time, bar);
  103.       }, {attributes: true});
  104.     },
  105.     observeVideo: function(video, progress){
  106.       if(video.duration < SHORTDURATION) progress.classList.add('transition');
  107.       progress.style.transform = 'scaleX(0)';
  108.       video.addEventListener('durationchange', function(e){
  109.         if(video.duration < SHORTDURATION) progress.classList.add('transition');
  110.         else progress.classList.remove('transition');
  111.       });
  112.       video.addEventListener('timeupdate', function(e){
  113.         progress.style.transform = `scaleX(${video.currentTime / video.duration})`;
  114.       });
  115.     },
  116.     getTargets: function(targets, retry = 0){
  117.       const get = function(resolve, reject, retry){
  118.         for(let i = 0, keys = Object.keys(targets), key; key = keys[i]; i++){
  119.           let selected = targets[key]();
  120.           if(selected){
  121.             if(selected.length) selected.forEach((s) => s.dataset.selector = key);
  122.             else selected.dataset.selector = key;
  123.             elements[key] = selected;
  124.           }else{
  125.             if(--retry < 0) return reject(log(`Not found: ${key}, I give up.`));
  126.             log(`Not found: ${key}, retrying... (left ${retry})`);
  127.             return setTimeout(get, 1000, resolve, reject, retry);
  128.           }
  129.         }
  130.         resolve();
  131.       };
  132.       return new Promise(function(resolve, reject){
  133.         get(resolve, reject, retry);
  134.       });
  135.     },
  136.     addStyle: function(name = 'style'){
  137.       if(core.html[name] === undefined) return;
  138.       let style = createElement(core.html[name]());
  139.       document.head.appendChild(style);
  140.       if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
  141.       elements[name] = style;
  142.     },
  143.     html: {
  144.       bar: () => `<div id="${SCRIPTID}-bar"><div id="${SCRIPTID}-progress"></div></div>`,
  145.       style: () => `
  146.         <style type="text/css">
  147.           #${SCRIPTID}-bar{
  148.             --height: 3px;
  149.             --background: rgba(255,255,255,.2);
  150.             --color: #f00;
  151.             --ad-color: #fc0;
  152.             --transition-bar: opacity .25s cubic-bezier(0.0,0.0,0.2,1);
  153.             --transition-progress: transform .25s linear;
  154.             --z-index: 100;
  155.           }
  156.           #${SCRIPTID}-bar{
  157.             width: 100%;
  158.             height: var(--height);
  159.             background: var(--background);
  160.             position: absolute;
  161.             bottom: 0;
  162.             transition: var(--transition-bar);
  163.             opacity: 0;
  164.             z-index: var(--z-index);
  165.           }
  166.           #${SCRIPTID}-progress{
  167.             width: 100%;
  168.             height: var(--height);
  169.             background: var(--color);
  170.             transform-origin: 0 0;
  171.           }
  172.           #${SCRIPTID}-progress.transition{
  173.             transition: var(--transition-progress);
  174.           }
  175.           .ad-interrupting/*advertisement*/ #${SCRIPTID}-progress{
  176.             background: var(--ad-color);
  177.           }
  178.           .ytp-autohide #${SCRIPTID}-bar.active{
  179.             opacity: 1;
  180.           }
  181.           .ytp-ad-persistent-progress-bar-container/*YouTube offers progress bar only when an ad is showing, but it doesn't have transition animation*/{
  182.             display: none
  183.           }
  184.         </style>
  185.       `,
  186.     },
  187.   };
  188.   const setTimeout = window.setTimeout, clearTimeout = window.clearTimeout, setInterval = window.setInterval, clearInterval = window.clearInterval, requestAnimationFrame = window.requestAnimationFrame;
  189.   const alert = window.alert, confirm = window.confirm, getComputedStyle = window.getComputedStyle, fetch = window.fetch;
  190.   if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  191.   class Storage{
  192.     static key(key){
  193.       return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
  194.     }
  195.     static save(key, value, expire = null){
  196.       key = Storage.key(key);
  197.       localStorage[key] = JSON.stringify({
  198.         value: value,
  199.         saved: Date.now(),
  200.         expire: expire,
  201.       });
  202.     }
  203.     static read(key){
  204.       key = Storage.key(key);
  205.       if(localStorage[key] === undefined) return undefined;
  206.       let data = JSON.parse(localStorage[key]);
  207.       if(data.value === undefined) return data;
  208.       if(data.expire === undefined) return data;
  209.       if(data.expire === null) return data.value;
  210.       if(data.expire < Date.now()) return localStorage.removeItem(key);
  211.       return data.value;
  212.     }
  213.     static delete(key){
  214.       key = Storage.key(key);
  215.       delete localStorage.removeItem(key);
  216.     }
  217.     static saved(key){
  218.       key = Storage.key(key);
  219.       if(localStorage[key] === undefined) return undefined;
  220.       let data = JSON.parse(localStorage[key]);
  221.       if(data.saved) return data.saved;
  222.       else return undefined;
  223.     }
  224.   }
  225.   const $ = function(s, f){
  226.     let target = document.querySelector(s);
  227.     if(target === null) return null;
  228.     return f ? f(target) : target;
  229.   };
  230.   const $$ = function(s){return document.querySelectorAll(s)};
  231.   const animate = function(callback, ...params){requestAnimationFrame(() => requestAnimationFrame(() => callback(...params)))};
  232.   const wait = function(ms){return new Promise((resolve) => setTimeout(resolve, ms))};
  233.   const createElement = function(html = '<span></span>'){
  234.     let outer = document.createElement('div');
  235.     outer.innerHTML = html;
  236.     return outer.firstElementChild;
  237.   };
  238.   const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
  239.     let observer = new MutationObserver(callback.bind(element));
  240.     observer.observe(element, options);
  241.     return observer;
  242.   };
  243.   const secondsToTime = function(seconds){
  244.     let floor = Math.floor, zero = (s) => s.toString().padStart(2, '0');
  245.     let h = floor(seconds/3600), m = floor(seconds/60)%60, s = floor(seconds%60);
  246.     if(h) return h + '時間' + zero(m) + '分' + zero(s) + '秒';
  247.     if(m) return m + '分' + zero(s) + '秒';
  248.     if(s) return s + '秒';
  249.   };
  250.   const timeToSeconds = function(time){
  251.     let parts = time.split(':').map(p => parseFloat(p));
  252.     switch(parts.length){
  253.       case(1): return parts[0];
  254.       case(2): return parts[0]*60 + parts[1];
  255.       case(3): return parts[0]*60*60 + parts[1]*60 + parts[2];
  256.       default: return 0;
  257.     }
  258.   };
  259.   const atLeast = function(min, b){
  260.     return Math.max(min, b);
  261.   };
  262.   const atMost = function(a, max){
  263.     return Math.min(a, max);
  264.   };
  265.   const between = function(min, b, max){
  266.     return Math.min(Math.max(min, b), max);
  267.   };
  268.   const toMetric = function(number, decimal = 1){
  269.     switch(true){
  270.       case(number < 1e3 ): return (number);
  271.       case(number < 1e6 ): return (number/1e3 ).toFixed(decimal) + 'K';
  272.       case(number < 1e9 ): return (number/1e6 ).toFixed(decimal) + 'M';
  273.       case(number < 1e12): return (number/1e9 ).toFixed(decimal) + 'G';
  274.       default:             return (number/1e12).toFixed(decimal) + 'T';
  275.     }
  276.   };
  277.   const log = function(){
  278.     if(!DEBUG) return;
  279.     let l = log.last = log.now || new Date(), n = log.now = new Date();
  280.     let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
  281.     //console.log(error.stack);
  282.     console.log(
  283.       (SCRIPTID || '') + ':',
  284.       /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
  285.       /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
  286.       /* :00           */ ':' + line,
  287.       /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
  288.       /* caller        */ (callers[1] || '') + '()',
  289.       ...arguments
  290.     );
  291.   };
  292.   log.formats = [{
  293.       name: 'Firefox Scratchpad',
  294.       detector: /MARKER@Scratchpad/,
  295.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  296.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  297.     }, {
  298.       name: 'Firefox Console',
  299.       detector: /MARKER@debugger/,
  300.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  301.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  302.     }, {
  303.       name: 'Firefox Greasemonkey 3',
  304.       detector: /\/gm_scripts\//,
  305.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  306.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  307.     }, {
  308.       name: 'Firefox Greasemonkey 4+',
  309.       detector: /MARKER@user-script:/,
  310.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
  311.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  312.     }, {
  313.       name: 'Firefox Tampermonkey',
  314.       detector: /MARKER@moz-extension:/,
  315.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
  316.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  317.     }, {
  318.       name: 'Chrome Console',
  319.       detector: /at MARKER \(<anonymous>/,
  320.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  321.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
  322.     }, {
  323.       name: 'Chrome Tampermonkey',
  324.       detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?id=/,
  325.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 6,
  326.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  327.     }, {
  328.       name: 'Chrome Extension',
  329.       detector: /at MARKER \(chrome-extension:/,
  330.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  331.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  332.     }, {
  333.       name: 'Edge Console',
  334.       detector: /at MARKER \(eval/,
  335.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
  336.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
  337.     }, {
  338.       name: 'Edge Tampermonkey',
  339.       detector: /at MARKER \(Function/,
  340.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
  341.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
  342.     }, {
  343.       name: 'Safari',
  344.       detector: /^MARKER$/m,
  345.       getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
  346.       getCallers: (e) => e.stack.split('\n'),
  347.     }, {
  348.       name: 'Default',
  349.       detector: /./,
  350.       getLine: (e) => 0,
  351.       getCallers: (e) => [],
  352.     }];
  353.   log.format = log.formats.find(function MARKER(f){
  354.     if(!f.detector.test(new Error().stack)) return false;
  355.     //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
  356.     return true;
  357.   });
  358.   const time = function(label){
  359.     if(!DEBUG) return;
  360.     const BAR = '|', TOTAL = 100;
  361.     switch(true){
  362.       case(label === undefined):/* time() to output total */
  363.         let total = 0;
  364.         Object.keys(time.records).forEach((label) => total += time.records[label].total);
  365.         Object.keys(time.records).forEach((label) => {
  366.           console.log(
  367.             BAR.repeat((time.records[label].total / total) * TOTAL),
  368.             label + ':',
  369.             (time.records[label].total).toFixed(3) + 'ms',
  370.             '(' + time.records[label].count + ')',
  371.           );
  372.         });
  373.         time.records = {};
  374.         break;
  375.       case(!time.records[label]):/* time('label') to create and start the record */
  376.         time.records[label] = {count: 0, from: performance.now(), total: 0};
  377.         break;
  378.       case(time.records[label].from === null):/* time('label') to re-start the lap */
  379.         time.records[label].from = performance.now();
  380.         break;
  381.       case(0 < time.records[label].from):/* time('label') to add lap time to the record */
  382.         time.records[label].total += performance.now() - time.records[label].from;
  383.         time.records[label].from = null;
  384.         time.records[label].count += 1;
  385.         break;
  386.     }
  387.   };
  388.   time.records = {};
  389.   core.initialize();
  390.   if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
  391. })();