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YouTube ProgressBar Preserver

It preserves YouTube's progress bar always visible even if the controls are hidden.

目前為 2020-04-11 提交的版本，檢視 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. // @version     0.12.0
  11. // @grant       none
  12. // ==/UserScript==
  13.  
  14. (function(){
  15.   const SCRIPTID = 'YouTubeProgressBarPreserver';
  16.   const SCRIPTNAME = 'YouTube ProgressBar Preserver';
  17.   const DEBUG = false;/*
  18. [update] 0.12.0
  19. Now available on embedded videos.
  20.  
  21. [bug]
  22. 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？
  23.  
  24. [todo]
  25. カスタマイズ(color, height, opacity, 各表示モードでのオンオフ)
  26. うっすら時刻表示オプションほしい？
  27.  
  28. [research]
  29. 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
  30. timeupdateきっかけで250msをキープするような仕組みでいける？
  31. 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。
  32.  
  33. [memo]
  34. 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。
  35. 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^)／
  36. https://addons.mozilla.org/ja/firefox/addon/progress-bar-for-youtube/
  37. 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。
  38.   */
  39.   if(window === top && console.time) console.time(SCRIPTID);
  40.   const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
  41.   const INTERVAL = 1*SECOND;/*for core.checkUrl*/
  42.   const SHORTDURATION = 4*MINUTE / 1000;/*short video should have transition*/
  43.   const STARTSWITH = [/*for core.checkUrl*/
  44.     'https://www.youtube.com/watch?',
  45.     'https://www.youtube.com/embed/',
  46.   ];
  47.   const RETRY = 10;
  48.   let site = {
  49.     targets: {
  50.       player: () => $('.html5-video-player'),
  51.       video: () => $('video[src]'),
  52.       time: () => $('.ytp-time-display'),
  53.     },
  54.     is: {
  55.       live: (time) => time.classList.contains('ytp-live'),
  56.     },
  57.   };
  58.   let html, elements = {}, timers = {};
  59.   let core = {
  60.     initialize: function(){
  61.       html = document.documentElement;
  62.       html.classList.add(SCRIPTID);
  63.       core.checkUrl();
  64.       core.addStyle();
  65.     },
  66.     checkUrl: function(){
  67.       let previousUrl = '';
  68.       timers.checkUrl = setInterval(function(){
  69.         if(document.hidden) return;
  70.         /* The page is visible, so... */
  71.         if(location.href === previousUrl) return;
  72.         else previousUrl = location.href;
  73.         /* The URL has changed, so... */
  74.         if(STARTSWITH.some(url => location.href.startsWith(url)) === false) return;
  75.         /* This page should be modified, so... */
  76.         core.ready();
  77.       }, INTERVAL);
  78.     },
  79.     ready: function(){
  80.       core.getTargets(site.targets, RETRY).then(() => {
  81.         log("I'm ready.");
  82.         core.appendBar();
  83.       });
  84.     },
  85.     appendBar: function(){
  86.       if(elements.bar && elements.bar.isConnected) return;
  87.       let bar = elements.bar = createElement(core.html.bar());
  88.       let progress = elements.progress = bar.firstElementChild;
  89.       elements.player.appendChild(bar);
  90.       core.observeTime(elements.time, bar);
  91.       core.observeVideo(elements.video, progress);
  92.     },
  93.     observeTime: function(time, bar){
  94.       let detect = function(time, bar){
  95.         if(site.is.live(time)) bar.classList.remove('active');
  96.         else bar.classList.add('active');
  97.       };
  98.       detect(time, bar);
  99.       let observer = observe(time, function(records){
  100.         detect(time, bar);
  101.       }, {attributes: true});
  102.     },
  103.     observeVideo: function(video, progress){
  104.       if(video.duration < SHORTDURATION) progress.classList.add('transition');
  105.       progress.style.transform = 'scaleX(0)';
  106.       video.addEventListener('durationchange', function(e){
  107.         if(video.duration < SHORTDURATION) progress.classList.add('transition');
  108.         else progress.classList.remove('transition');
  109.       });
  110.       video.addEventListener('timeupdate', function(e){
  111.         progress.style.transform = `scaleX(${video.currentTime / video.duration})`;
  112.       });
  113.     },
  114.     getTargets: function(targets, retry = 0){
  115.       const get = function(resolve, reject, retry){
  116.         for(let i = 0, keys = Object.keys(targets), key; key = keys[i]; i++){
  117.           let selected = targets[key]();
  118.           if(selected){
  119.             if(selected.length) selected.forEach((s) => s.dataset.selector = key);
  120.             else selected.dataset.selector = key;
  121.             elements[key] = selected;
  122.           }else{
  123.             if(--retry < 0) return reject(log(`Not found: ${key}, I give up.`));
  124.             log(`Not found: ${key}, retrying... (left ${retry})`);
  125.             return setTimeout(get, 1000, resolve, reject, retry);
  126.           }
  127.         }
  128.         resolve();
  129.       };
  130.       return new Promise(function(resolve, reject){
  131.         get(resolve, reject, retry);
  132.       });
  133.     },
  134.     addStyle: function(name = 'style'){
  135.       if(core.html[name] === undefined) return;
  136.       let style = createElement(core.html[name]());
  137.       document.head.appendChild(style);
  138.       if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
  139.       elements[name] = style;
  140.     },
  141.     html: {
  142.       bar: () => `<div id="${SCRIPTID}-bar"><div id="${SCRIPTID}-progress"></div></div>`,
  143.       style: () => `
  144.         <style type="text/css">
  145.           #${SCRIPTID}-bar{
  146.             --height: 3px;
  147.             --background: rgba(255,255,255,.2);
  148.             --color: #f00;
  149.             --ad-color: #fc0;
  150.             --transition-bar: opacity .25s cubic-bezier(0.0,0.0,0.2,1);
  151.             --transition-progress: transform .25s linear;
  152.             --z-index: 100;
  153.           }
  154.           #${SCRIPTID}-bar{
  155.             width: 100%;
  156.             height: var(--height);
  157.             background: var(--background);
  158.             position: absolute;
  159.             bottom: 0;
  160.             transition: var(--transition-bar);
  161.             opacity: 0;
  162.             z-index: var(--z-index);
  163.           }
  164.           #${SCRIPTID}-progress{
  165.             width: 100%;
  166.             height: var(--height);
  167.             background: var(--color);
  168.             transform-origin: 0 0;
  169.           }
  170.           #${SCRIPTID}-progress.transition{
  171.             transition: var(--transition-progress);
  172.           }
  173.           .ad-interrupting/*advertisement*/ #${SCRIPTID}-progress{
  174.             background: var(--ad-color);
  175.           }
  176.           .ytp-autohide #${SCRIPTID}-bar.active{
  177.             opacity: 1;
  178.           }
  179.           .ytp-ad-persistent-progress-bar-container/*YouTube offers progress bar only when an ad is showing, but it doesn't have transition animation*/{
  180.             display: none
  181.           }
  182.         </style>
  183.       `,
  184.     },
  185.   };
  186.   const setTimeout = window.setTimeout, clearTimeout = window.clearTimeout, setInterval = window.setInterval, clearInterval = window.clearInterval, requestAnimationFrame = window.requestAnimationFrame;
  187.   const alert = window.alert, confirm = window.confirm, getComputedStyle = window.getComputedStyle, fetch = window.fetch;
  188.   if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  189.   class Storage{
  190.     static key(key){
  191.       return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
  192.     }
  193.     static save(key, value, expire = null){
  194.       key = Storage.key(key);
  195.       localStorage[key] = JSON.stringify({
  196.         value: value,
  197.         saved: Date.now(),
  198.         expire: expire,
  199.       });
  200.     }
  201.     static read(key){
  202.       key = Storage.key(key);
  203.       if(localStorage[key] === undefined) return undefined;
  204.       let data = JSON.parse(localStorage[key]);
  205.       if(data.value === undefined) return data;
  206.       if(data.expire === undefined) return data;
  207.       if(data.expire === null) return data.value;
  208.       if(data.expire < Date.now()) return localStorage.removeItem(key);
  209.       return data.value;
  210.     }
  211.     static delete(key){
  212.       key = Storage.key(key);
  213.       delete localStorage.removeItem(key);
  214.     }
  215.     static saved(key){
  216.       key = Storage.key(key);
  217.       if(localStorage[key] === undefined) return undefined;
  218.       let data = JSON.parse(localStorage[key]);
  219.       if(data.saved) return data.saved;
  220.       else return undefined;
  221.     }
  222.   }
  223.   const $ = function(s, f){
  224.     let target = document.querySelector(s);
  225.     if(target === null) return null;
  226.     return f ? f(target) : target;
  227.   };
  228.   const $$ = function(s){return document.querySelectorAll(s)};
  229.   const animate = function(callback, ...params){requestAnimationFrame(() => requestAnimationFrame(() => callback(...params)))};
  230.   const wait = function(ms){return new Promise((resolve) => setTimeout(resolve, ms))};
  231.   const createElement = function(html = '<span></span>'){
  232.     let outer = document.createElement('div');
  233.     outer.innerHTML = html;
  234.     return outer.firstElementChild;
  235.   };
  236.   const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
  237.     let observer = new MutationObserver(callback.bind(element));
  238.     observer.observe(element, options);
  239.     return observer;
  240.   };
  241.   const secondsToTime = function(seconds){
  242.     let floor = Math.floor, zero = (s) => s.toString().padStart(2, '0');
  243.     let h = floor(seconds/3600), m = floor(seconds/60)%60, s = floor(seconds%60);
  244.     if(h) return h + '時間' + zero(m) + '分' + zero(s) + '秒';
  245.     if(m) return m + '分' + zero(s) + '秒';
  246.     if(s) return s + '秒';
  247.   };
  248.   const timeToSeconds = function(time){
  249.     let parts = time.split(':').map(p => parseFloat(p));
  250.     switch(parts.length){
  251.       case(1): return parts[0];
  252.       case(2): return parts[0]*60 + parts[1];
  253.       case(3): return parts[0]*60*60 + parts[1]*60 + parts[2];
  254.       default: return 0;
  255.     }
  256.   };
  257.   const atLeast = function(min, b){
  258.     return Math.max(min, b);
  259.   };
  260.   const atMost = function(a, max){
  261.     return Math.min(a, max);
  262.   };
  263.   const between = function(min, b, max){
  264.     return Math.min(Math.max(min, b), max);
  265.   };
  266.   const toMetric = function(number, decimal = 1){
  267.     switch(true){
  268.       case(number < 1e3 ): return (number);
  269.       case(number < 1e6 ): return (number/1e3 ).toFixed(decimal) + 'K';
  270.       case(number < 1e9 ): return (number/1e6 ).toFixed(decimal) + 'M';
  271.       case(number < 1e12): return (number/1e9 ).toFixed(decimal) + 'G';
  272.       default:             return (number/1e12).toFixed(decimal) + 'T';
  273.     }
  274.   };
  275.   const log = function(){
  276.     if(!DEBUG) return;
  277.     let l = log.last = log.now || new Date(), n = log.now = new Date();
  278.     let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
  279.     //console.log(error.stack);
  280.     console.log(
  281.       (SCRIPTID || '') + ':',
  282.       /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
  283.       /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
  284.       /* :00           */ ':' + line,
  285.       /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
  286.       /* caller        */ (callers[1] || '') + '()',
  287.       ...arguments
  288.     );
  289.   };
  290.   log.formats = [{
  291.       name: 'Firefox Scratchpad',
  292.       detector: /MARKER@Scratchpad/,
  293.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  294.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  295.     }, {
  296.       name: 'Firefox Console',
  297.       detector: /MARKER@debugger/,
  298.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  299.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  300.     }, {
  301.       name: 'Firefox Greasemonkey 3',
  302.       detector: /\/gm_scripts\//,
  303.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  304.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  305.     }, {
  306.       name: 'Firefox Greasemonkey 4+',
  307.       detector: /MARKER@user-script:/,
  308.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
  309.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  310.     }, {
  311.       name: 'Firefox Tampermonkey',
  312.       detector: /MARKER@moz-extension:/,
  313.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
  314.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  315.     }, {
  316.       name: 'Chrome Console',
  317.       detector: /at MARKER \(<anonymous>/,
  318.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  319.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
  320.     }, {
  321.       name: 'Chrome Tampermonkey',
  322.       detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?id=/,
  323.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 6,
  324.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  325.     }, {
  326.       name: 'Chrome Extension',
  327.       detector: /at MARKER \(chrome-extension:/,
  328.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  329.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  330.     }, {
  331.       name: 'Edge Console',
  332.       detector: /at MARKER \(eval/,
  333.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
  334.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
  335.     }, {
  336.       name: 'Edge Tampermonkey',
  337.       detector: /at MARKER \(Function/,
  338.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
  339.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
  340.     }, {
  341.       name: 'Safari',
  342.       detector: /^MARKER$/m,
  343.       getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
  344.       getCallers: (e) => e.stack.split('\n'),
  345.     }, {
  346.       name: 'Default',
  347.       detector: /./,
  348.       getLine: (e) => 0,
  349.       getCallers: (e) => [],
  350.     }];
  351.   log.format = log.formats.find(function MARKER(f){
  352.     if(!f.detector.test(new Error().stack)) return false;
  353.     //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
  354.     return true;
  355.   });
  356.   const time = function(label){
  357.     if(!DEBUG) return;
  358.     const BAR = '|', TOTAL = 100;
  359.     switch(true){
  360.       case(label === undefined):/* time() to output total */
  361.         let total = 0;
  362.         Object.keys(time.records).forEach((label) => total += time.records[label].total);
  363.         Object.keys(time.records).forEach((label) => {
  364.           console.log(
  365.             BAR.repeat((time.records[label].total / total) * TOTAL),
  366.             label + ':',
  367.             (time.records[label].total).toFixed(3) + 'ms',
  368.             '(' + time.records[label].count + ')',
  369.           );
  370.         });
  371.         time.records = {};
  372.         break;
  373.       case(!time.records[label]):/* time('label') to create and start the record */
  374.         time.records[label] = {count: 0, from: performance.now(), total: 0};
  375.         break;
  376.       case(time.records[label].from === null):/* time('label') to re-start the lap */
  377.         time.records[label].from = performance.now();
  378.         break;
  379.       case(0 < time.records[label].from):/* time('label') to add lap time to the record */
  380.         time.records[label].total += performance.now() - time.records[label].from;
  381.         time.records[label].from = null;
  382.         time.records[label].count += 1;
  383.         break;
  384.     }
  385.   };
  386.   time.records = {};
  387.   core.initialize();
  388.   if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
  389. })();