☰

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 2020-02-19 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. // @version     0.11.0
  11. // @grant       none
  12. // ==/UserScript==
  13.  
  14. (function(){
  15.   const SCRIPTID = 'YouTubeProgressBarPreserver';
  16.   const SCRIPTNAME = 'YouTube ProgressBar Preserver';
  17.   const DEBUG = false;/*
  18. [update] 0.11.0
  19. less CPU usage on videos less than 4 mins.
  20.  
  21. [todo]
  22. カスタマイズ(color, height, opacity, 各表示モードでのオンオフ)
  23. うっすら時刻表示オプションほしい？
  24.  
  25. [research]
  26. 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
  27. timeupdateきっかけで250msをキープするような仕組みでいける？
  28. 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。
  29.  
  30. [memo]
  31. 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。
  32. 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^)／
  33. https://addons.mozilla.org/ja/firefox/addon/progress-bar-for-youtube/
  34. 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。
  35.   */
  36.   if(window === top && console.time) console.time(SCRIPTID);
  37.   const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
  38.   const INTERVAL = 1*SECOND;/*for core.checkUrl*/
  39.   const SHORTDURATION = 4*MINUTE / 1000;/*short video should have transition*/
  40.   const STARTSWITH = [/*for core.checkUrl*/
  41.     'https://www.youtube.com/watch?v=',
  42.   ];
  43.   const RETRY = 10;
  44.   let site = {
  45.     targets: {
  46.       player: () => $('#movie_player'),
  47.       video: () => $('video[src]'),
  48.       time: () => $('.ytp-time-display'),
  49.     },
  50.     is: {
  51.       live: (time) => time.classList.contains('ytp-live'),
  52.     },
  53.   };
  54.   let html, elements = {}, timers = {};
  55.   let core = {
  56.     initialize: function(){
  57.       html = document.documentElement;
  58.       html.classList.add(SCRIPTID);
  59.       core.checkUrl();
  60.       core.addStyle();
  61.     },
  62.     checkUrl: function(){
  63.       let previousUrl = '';
  64.       timers.checkUrl = setInterval(function(){
  65.         if(document.hidden) return;
  66.         /* The page is visible, so... */
  67.         if(location.href === previousUrl) return;
  68.         else previousUrl = location.href;
  69.         /* The URL has changed, so... */
  70.         if(STARTSWITH.some(url => location.href.startsWith(url)) === false) return;
  71.         /* This page should be modified, so... */
  72.         core.ready();
  73.       }, INTERVAL);
  74.     },
  75.     ready: function(){
  76.       core.getTargets(site.targets, RETRY).then(() => {
  77.         log("I'm ready.");
  78.         core.appendBar();
  79.       });
  80.     },
  81.     appendBar: function(){
  82.       if(elements.bar && elements.bar.isConnected) return;
  83.       let bar = elements.bar = createElement(core.html.bar());
  84.       let progress = elements.progress = bar.firstElementChild;
  85.       elements.player.appendChild(bar);
  86.       core.observeTime(elements.time, bar);
  87.       core.observeVideo(elements.video, progress);
  88.     },
  89.     observeTime: function(time, bar){
  90.       let detect = function(time, bar){
  91.         if(site.is.live(time)) bar.classList.remove('active');
  92.         else bar.classList.add('active');
  93.       };
  94.       detect(time, bar);
  95.       let observer = observe(time, function(records){
  96.         detect(time, bar);
  97.       }, {attributes: true});
  98.     },
  99.     observeVideo: function(video, progress){
  100. log(video, video.duration, progress);
  101.       if(video.duration < SHORTDURATION) progress.classList.add('transition');
  102.       progress.style.transform = 'scaleX(0)';
  103.       video.addEventListener('durationchange', function(e){
  104. log(video, video.duration, progress);
  105.         if(video.duration < SHORTDURATION) progress.classList.add('transition');
  106.         else progress.classList.remove('transition');
  107.       });
  108.       video.addEventListener('timeupdate', function(e){
  109.         progress.style.transform = `scaleX(${video.currentTime / video.duration})`;
  110.       });
  111.     },
  112.     getTargets: function(targets, retry = 0){
  113.       const get = function(resolve, reject, retry){
  114.         for(let i = 0, keys = Object.keys(targets), key; key = keys[i]; i++){
  115.           let selected = targets[key]();
  116.           if(selected){
  117.             if(selected.length) selected.forEach((s) => s.dataset.selector = key);
  118.             else selected.dataset.selector = key;
  119.             elements[key] = selected;
  120.           }else{
  121.             if(--retry < 0) return reject(log(`Not found: ${key}, I give up.`));
  122.             log(`Not found: ${key}, retrying... (left ${retry})`);
  123.             return setTimeout(get, 1000, resolve, reject, retry);
  124.           }
  125.         }
  126.         resolve();
  127.       };
  128.       return new Promise(function(resolve, reject){
  129.         get(resolve, reject, retry);
  130.       });
  131.     },
  132.     addStyle: function(name = 'style'){
  133.       if(core.html[name] === undefined) return;
  134.       let style = createElement(core.html[name]());
  135.       document.head.appendChild(style);
  136.       if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
  137.       elements[name] = style;
  138.     },
  139.     html: {
  140.       bar: () => `<div id="${SCRIPTID}-bar"><div id="${SCRIPTID}-progress"></div></div>`,
  141.       style: () => `
  142.         <style type="text/css">
  143.           #${SCRIPTID}-bar{
  144.             --height: 3px;
  145.             --background: rgba(255,255,255,.2);
  146.             --color: #f00;
  147.             --ad-color: #fc0;
  148.             --transition-bar: opacity .25s cubic-bezier(0.0,0.0,0.2,1);
  149.             --transition-progress: transform .25s linear;
  150.             --z-index: 100;
  151.           }
  152.           #${SCRIPTID}-bar{
  153.             width: 100%;
  154.             height: var(--height);
  155.             background: var(--background);
  156.             position: absolute;
  157.             bottom: 0;
  158.             transition: var(--transition-bar);
  159.             opacity: 0;
  160.             z-index: var(--z-index);
  161.           }
  162.           #${SCRIPTID}-progress{
  163.             width: 100%;
  164.             height: var(--height);
  165.             background: var(--color);
  166.             transform-origin: 0 0;
  167.           }
  168.           #${SCRIPTID}-progress.transition{
  169.             transition: var(--transition-progress);
  170.           }
  171.           .ad-interrupting/*advertisement*/ #${SCRIPTID}-progress{
  172.             background: var(--ad-color);
  173.           }
  174.           .ytp-autohide #${SCRIPTID}-bar.active{
  175.             opacity: 1;
  176.           }
  177.           .ytp-ad-persistent-progress-bar-container/*YouTube offers progress bar only when an ad is showing, but it doesn't have transition animation*/{
  178.             display: none
  179.           }
  180.         </style>
  181.       `,
  182.     },
  183.   };
  184.   const setTimeout = window.setTimeout, clearTimeout = window.clearTimeout, setInterval = window.setInterval, clearInterval = window.clearInterval, requestAnimationFrame = window.requestAnimationFrame;
  185.   const alert = window.alert, confirm = window.confirm, getComputedStyle = window.getComputedStyle, fetch = window.fetch;
  186.   if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  187.   class Storage{
  188.     static key(key){
  189.       return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
  190.     }
  191.     static save(key, value, expire = null){
  192.       key = Storage.key(key);
  193.       localStorage[key] = JSON.stringify({
  194.         value: value,
  195.         saved: Date.now(),
  196.         expire: expire,
  197.       });
  198.     }
  199.     static read(key){
  200.       key = Storage.key(key);
  201.       if(localStorage[key] === undefined) return undefined;
  202.       let data = JSON.parse(localStorage[key]);
  203.       if(data.value === undefined) return data;
  204.       if(data.expire === undefined) return data;
  205.       if(data.expire === null) return data.value;
  206.       if(data.expire < Date.now()) return localStorage.removeItem(key);
  207.       return data.value;
  208.     }
  209.     static delete(key){
  210.       key = Storage.key(key);
  211.       delete localStorage.removeItem(key);
  212.     }
  213.     static saved(key){
  214.       key = Storage.key(key);
  215.       if(localStorage[key] === undefined) return undefined;
  216.       let data = JSON.parse(localStorage[key]);
  217.       if(data.saved) return data.saved;
  218.       else return undefined;
  219.     }
  220.   }
  221.   const $ = function(s, f){
  222.     let target = document.querySelector(s);
  223.     if(target === null) return null;
  224.     return f ? f(target) : target;
  225.   };
  226.   const $$ = function(s){return document.querySelectorAll(s)};
  227.   const animate = function(callback, ...params){requestAnimationFrame(() => requestAnimationFrame(() => callback(...params)))};
  228.   const wait = function(ms){return new Promise((resolve) => setTimeout(resolve, ms))};
  229.   const createElement = function(html = '<span></span>'){
  230.     let outer = document.createElement('div');
  231.     outer.innerHTML = html;
  232.     return outer.firstElementChild;
  233.   };
  234.   const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
  235.     let observer = new MutationObserver(callback.bind(element));
  236.     observer.observe(element, options);
  237.     return observer;
  238.   };
  239.   const secondsToTime = function(seconds){
  240.     let floor = Math.floor, zero = (s) => s.toString().padStart(2, '0');
  241.     let h = floor(seconds/3600), m = floor(seconds/60)%60, s = floor(seconds%60);
  242.     if(h) return h + '時間' + zero(m) + '分' + zero(s) + '秒';
  243.     if(m) return m + '分' + zero(s) + '秒';
  244.     if(s) return s + '秒';
  245.   };
  246.   const timeToSeconds = function(time){
  247.     let parts = time.split(':').map(p => parseFloat(p));
  248.     switch(parts.length){
  249.       case(1): return parts[0];
  250.       case(2): return parts[0]*60 + parts[1];
  251.       case(3): return parts[0]*60*60 + parts[1]*60 + parts[2];
  252.       default: return 0;
  253.     }
  254.   };
  255.   const atLeast = function(min, b){
  256.     return Math.max(min, b);
  257.   };
  258.   const atMost = function(a, max){
  259.     return Math.min(a, max);
  260.   };
  261.   const between = function(min, b, max){
  262.     return Math.min(Math.max(min, b), max);
  263.   };
  264.   const toMetric = function(number, decimal = 1){
  265.     switch(true){
  266.       case(number < 1e3 ): return (number);
  267.       case(number < 1e6 ): return (number/1e3 ).toFixed(decimal) + 'K';
  268.       case(number < 1e9 ): return (number/1e6 ).toFixed(decimal) + 'M';
  269.       case(number < 1e12): return (number/1e9 ).toFixed(decimal) + 'G';
  270.       default:             return (number/1e12).toFixed(decimal) + 'T';
  271.     }
  272.   };
  273.   const log = function(){
  274.     if(!DEBUG) return;
  275.     let l = log.last = log.now || new Date(), n = log.now = new Date();
  276.     let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
  277.     //console.log(error.stack);
  278.     console.log(
  279.       (SCRIPTID || '') + ':',
  280.       /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
  281.       /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
  282.       /* :00           */ ':' + line,
  283.       /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
  284.       /* caller        */ (callers[1] || '') + '()',
  285.       ...arguments
  286.     );
  287.   };
  288.   log.formats = [{
  289.       name: 'Firefox Scratchpad',
  290.       detector: /MARKER@Scratchpad/,
  291.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  292.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  293.     }, {
  294.       name: 'Firefox Console',
  295.       detector: /MARKER@debugger/,
  296.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  297.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  298.     }, {
  299.       name: 'Firefox Greasemonkey 3',
  300.       detector: /\/gm_scripts\//,
  301.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  302.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  303.     }, {
  304.       name: 'Firefox Greasemonkey 4+',
  305.       detector: /MARKER@user-script:/,
  306.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
  307.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  308.     }, {
  309.       name: 'Firefox Tampermonkey',
  310.       detector: /MARKER@moz-extension:/,
  311.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
  312.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  313.     }, {
  314.       name: 'Chrome Console',
  315.       detector: /at MARKER \(<anonymous>/,
  316.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  317.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
  318.     }, {
  319.       name: 'Chrome Tampermonkey',
  320.       detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?id=/,
  321.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 6,
  322.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  323.     }, {
  324.       name: 'Chrome Extension',
  325.       detector: /at MARKER \(chrome-extension:/,
  326.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  327.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  328.     }, {
  329.       name: 'Edge Console',
  330.       detector: /at MARKER \(eval/,
  331.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
  332.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
  333.     }, {
  334.       name: 'Edge Tampermonkey',
  335.       detector: /at MARKER \(Function/,
  336.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
  337.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
  338.     }, {
  339.       name: 'Safari',
  340.       detector: /^MARKER$/m,
  341.       getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
  342.       getCallers: (e) => e.stack.split('\n'),
  343.     }, {
  344.       name: 'Default',
  345.       detector: /./,
  346.       getLine: (e) => 0,
  347.       getCallers: (e) => [],
  348.     }];
  349.   log.format = log.formats.find(function MARKER(f){
  350.     if(!f.detector.test(new Error().stack)) return false;
  351.     //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
  352.     return true;
  353.   });
  354.   const time = function(label){
  355.     if(!DEBUG) return;
  356.     const BAR = '|', TOTAL = 100;
  357.     switch(true){
  358.       case(label === undefined):/* time() to output total */
  359.         let total = 0;
  360.         Object.keys(time.records).forEach((label) => total += time.records[label].total);
  361.         Object.keys(time.records).forEach((label) => {
  362.           console.log(
  363.             BAR.repeat((time.records[label].total / total) * TOTAL),
  364.             label + ':',
  365.             (time.records[label].total).toFixed(3) + 'ms',
  366.             '(' + time.records[label].count + ')',
  367.           );
  368.         });
  369.         time.records = {};
  370.         break;
  371.       case(!time.records[label]):/* time('label') to create and start the record */
  372.         time.records[label] = {count: 0, from: performance.now(), total: 0};
  373.         break;
  374.       case(time.records[label].from === null):/* time('label') to re-start the lap */
  375.         time.records[label].from = performance.now();
  376.         break;
  377.       case(0 < time.records[label].from):/* time('label') to add lap time to the record */
  378.         time.records[label].total += performance.now() - time.records[label].from;
  379.         time.records[label].from = null;
  380.         time.records[label].count += 1;
  381.         break;
  382.     }
  383.   };
  384.   time.records = {};
  385.   core.initialize();
  386.   if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
  387. })();