☰

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.       if(video.duration < SHORTDURATION) progress.classList.add('transition');
  101.       progress.style.transform = 'scaleX(0)';
  102.       video.addEventListener('durationchange', function(e){
  103.         if(video.duration < SHORTDURATION) progress.classList.add('transition');
  104.         else progress.classList.remove('transition');
  105.       });
  106.       video.addEventListener('timeupdate', function(e){
  107.         progress.style.transform = `scaleX(${video.currentTime / video.duration})`;
  108.       });
  109.     },
  110.     getTargets: function(targets, retry = 0){
  111.       const get = function(resolve, reject, retry){
  112.         for(let i = 0, keys = Object.keys(targets), key; key = keys[i]; i++){
  113.           let selected = targets[key]();
  114.           if(selected){
  115.             if(selected.length) selected.forEach((s) => s.dataset.selector = key);
  116.             else selected.dataset.selector = key;
  117.             elements[key] = selected;
  118.           }else{
  119.             if(--retry < 0) return reject(log(`Not found: ${key}, I give up.`));
  120.             log(`Not found: ${key}, retrying... (left ${retry})`);
  121.             return setTimeout(get, 1000, resolve, reject, retry);
  122.           }
  123.         }
  124.         resolve();
  125.       };
  126.       return new Promise(function(resolve, reject){
  127.         get(resolve, reject, retry);
  128.       });
  129.     },
  130.     addStyle: function(name = 'style'){
  131.       if(core.html[name] === undefined) return;
  132.       let style = createElement(core.html[name]());
  133.       document.head.appendChild(style);
  134.       if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
  135.       elements[name] = style;
  136.     },
  137.     html: {
  138.       bar: () => `<div id="${SCRIPTID}-bar"><div id="${SCRIPTID}-progress"></div></div>`,
  139.       style: () => `
  140.         <style type="text/css">
  141.           #${SCRIPTID}-bar{
  142.             --height: 3px;
  143.             --background: rgba(255,255,255,.2);
  144.             --color: #f00;
  145.             --ad-color: #fc0;
  146.             --transition-bar: opacity .25s cubic-bezier(0.0,0.0,0.2,1);
  147.             --transition-progress: transform .25s linear;
  148.             --z-index: 100;
  149.           }
  150.           #${SCRIPTID}-bar{
  151.             width: 100%;
  152.             height: var(--height);
  153.             background: var(--background);
  154.             position: absolute;
  155.             bottom: 0;
  156.             transition: var(--transition-bar);
  157.             opacity: 0;
  158.             z-index: var(--z-index);
  159.           }
  160.           #${SCRIPTID}-progress{
  161.             width: 100%;
  162.             height: var(--height);
  163.             background: var(--color);
  164.             transform-origin: 0 0;
  165.           }
  166.           #${SCRIPTID}-progress.transition{
  167.             transition: var(--transition-progress);
  168.           }
  169.           .ad-interrupting/*advertisement*/ #${SCRIPTID}-progress{
  170.             background: var(--ad-color);
  171.           }
  172.           .ytp-autohide #${SCRIPTID}-bar.active{
  173.             opacity: 1;
  174.           }
  175.           .ytp-ad-persistent-progress-bar-container/*YouTube offers progress bar only when an ad is showing, but it doesn't have transition animation*/{
  176.             display: none
  177.           }
  178.         </style>
  179.       `,
  180.     },
  181.   };
  182.   const setTimeout = window.setTimeout, clearTimeout = window.clearTimeout, setInterval = window.setInterval, clearInterval = window.clearInterval, requestAnimationFrame = window.requestAnimationFrame;
  183.   const alert = window.alert, confirm = window.confirm, getComputedStyle = window.getComputedStyle, fetch = window.fetch;
  184.   if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
  185.   class Storage{
  186.     static key(key){
  187.       return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
  188.     }
  189.     static save(key, value, expire = null){
  190.       key = Storage.key(key);
  191.       localStorage[key] = JSON.stringify({
  192.         value: value,
  193.         saved: Date.now(),
  194.         expire: expire,
  195.       });
  196.     }
  197.     static read(key){
  198.       key = Storage.key(key);
  199.       if(localStorage[key] === undefined) return undefined;
  200.       let data = JSON.parse(localStorage[key]);
  201.       if(data.value === undefined) return data;
  202.       if(data.expire === undefined) return data;
  203.       if(data.expire === null) return data.value;
  204.       if(data.expire < Date.now()) return localStorage.removeItem(key);
  205.       return data.value;
  206.     }
  207.     static delete(key){
  208.       key = Storage.key(key);
  209.       delete localStorage.removeItem(key);
  210.     }
  211.     static saved(key){
  212.       key = Storage.key(key);
  213.       if(localStorage[key] === undefined) return undefined;
  214.       let data = JSON.parse(localStorage[key]);
  215.       if(data.saved) return data.saved;
  216.       else return undefined;
  217.     }
  218.   }
  219.   const $ = function(s, f){
  220.     let target = document.querySelector(s);
  221.     if(target === null) return null;
  222.     return f ? f(target) : target;
  223.   };
  224.   const $$ = function(s){return document.querySelectorAll(s)};
  225.   const animate = function(callback, ...params){requestAnimationFrame(() => requestAnimationFrame(() => callback(...params)))};
  226.   const wait = function(ms){return new Promise((resolve) => setTimeout(resolve, ms))};
  227.   const createElement = function(html = '<span></span>'){
  228.     let outer = document.createElement('div');
  229.     outer.innerHTML = html;
  230.     return outer.firstElementChild;
  231.   };
  232.   const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
  233.     let observer = new MutationObserver(callback.bind(element));
  234.     observer.observe(element, options);
  235.     return observer;
  236.   };
  237.   const secondsToTime = function(seconds){
  238.     let floor = Math.floor, zero = (s) => s.toString().padStart(2, '0');
  239.     let h = floor(seconds/3600), m = floor(seconds/60)%60, s = floor(seconds%60);
  240.     if(h) return h + '時間' + zero(m) + '分' + zero(s) + '秒';
  241.     if(m) return m + '分' + zero(s) + '秒';
  242.     if(s) return s + '秒';
  243.   };
  244.   const timeToSeconds = function(time){
  245.     let parts = time.split(':').map(p => parseFloat(p));
  246.     switch(parts.length){
  247.       case(1): return parts[0];
  248.       case(2): return parts[0]*60 + parts[1];
  249.       case(3): return parts[0]*60*60 + parts[1]*60 + parts[2];
  250.       default: return 0;
  251.     }
  252.   };
  253.   const atLeast = function(min, b){
  254.     return Math.max(min, b);
  255.   };
  256.   const atMost = function(a, max){
  257.     return Math.min(a, max);
  258.   };
  259.   const between = function(min, b, max){
  260.     return Math.min(Math.max(min, b), max);
  261.   };
  262.   const toMetric = function(number, decimal = 1){
  263.     switch(true){
  264.       case(number < 1e3 ): return (number);
  265.       case(number < 1e6 ): return (number/1e3 ).toFixed(decimal) + 'K';
  266.       case(number < 1e9 ): return (number/1e6 ).toFixed(decimal) + 'M';
  267.       case(number < 1e12): return (number/1e9 ).toFixed(decimal) + 'G';
  268.       default:             return (number/1e12).toFixed(decimal) + 'T';
  269.     }
  270.   };
  271.   const log = function(){
  272.     if(!DEBUG) return;
  273.     let l = log.last = log.now || new Date(), n = log.now = new Date();
  274.     let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
  275.     //console.log(error.stack);
  276.     console.log(
  277.       (SCRIPTID || '') + ':',
  278.       /* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
  279.       /* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
  280.       /* :00           */ ':' + line,
  281.       /* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
  282.       /* caller        */ (callers[1] || '') + '()',
  283.       ...arguments
  284.     );
  285.   };
  286.   log.formats = [{
  287.       name: 'Firefox Scratchpad',
  288.       detector: /MARKER@Scratchpad/,
  289.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  290.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  291.     }, {
  292.       name: 'Firefox Console',
  293.       detector: /MARKER@debugger/,
  294.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  295.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  296.     }, {
  297.       name: 'Firefox Greasemonkey 3',
  298.       detector: /\/gm_scripts\//,
  299.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
  300.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  301.     }, {
  302.       name: 'Firefox Greasemonkey 4+',
  303.       detector: /MARKER@user-script:/,
  304.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
  305.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  306.     }, {
  307.       name: 'Firefox Tampermonkey',
  308.       detector: /MARKER@moz-extension:/,
  309.       getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 6,
  310.       getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
  311.     }, {
  312.       name: 'Chrome Console',
  313.       detector: /at MARKER \(<anonymous>/,
  314.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  315.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
  316.     }, {
  317.       name: 'Chrome Tampermonkey',
  318.       detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?id=/,
  319.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 6,
  320.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  321.     }, {
  322.       name: 'Chrome Extension',
  323.       detector: /at MARKER \(chrome-extension:/,
  324.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
  325.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
  326.     }, {
  327.       name: 'Edge Console',
  328.       detector: /at MARKER \(eval/,
  329.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
  330.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
  331.     }, {
  332.       name: 'Edge Tampermonkey',
  333.       detector: /at MARKER \(Function/,
  334.       getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
  335.       getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
  336.     }, {
  337.       name: 'Safari',
  338.       detector: /^MARKER$/m,
  339.       getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
  340.       getCallers: (e) => e.stack.split('\n'),
  341.     }, {
  342.       name: 'Default',
  343.       detector: /./,
  344.       getLine: (e) => 0,
  345.       getCallers: (e) => [],
  346.     }];
  347.   log.format = log.formats.find(function MARKER(f){
  348.     if(!f.detector.test(new Error().stack)) return false;
  349.     //console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
  350.     return true;
  351.   });
  352.   const time = function(label){
  353.     if(!DEBUG) return;
  354.     const BAR = '|', TOTAL = 100;
  355.     switch(true){
  356.       case(label === undefined):/* time() to output total */
  357.         let total = 0;
  358.         Object.keys(time.records).forEach((label) => total += time.records[label].total);
  359.         Object.keys(time.records).forEach((label) => {
  360.           console.log(
  361.             BAR.repeat((time.records[label].total / total) * TOTAL),
  362.             label + ':',
  363.             (time.records[label].total).toFixed(3) + 'ms',
  364.             '(' + time.records[label].count + ')',
  365.           );
  366.         });
  367.         time.records = {};
  368.         break;
  369.       case(!time.records[label]):/* time('label') to create and start the record */
  370.         time.records[label] = {count: 0, from: performance.now(), total: 0};
  371.         break;
  372.       case(time.records[label].from === null):/* time('label') to re-start the lap */
  373.         time.records[label].from = performance.now();
  374.         break;
  375.       case(0 < time.records[label].from):/* time('label') to add lap time to the record */
  376.         time.records[label].total += performance.now() - time.records[label].from;
  377.         time.records[label].from = null;
  378.         time.records[label].count += 1;
  379.         break;
  380.     }
  381.   };
  382.   time.records = {};
  383.   core.initialize();
  384.   if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
  385. })();