将YouTube上的字幕放成粗体字，让人更容易看清。
// ==UserScript==
// @name YouTube Bolder Subtitles
// @name:ja YouTube Bolder Subtitles
// @name:zh-CN YouTube Bolder Subtitles
// @namespace knoa.jp
// @description Make subtitles bolder for better visibility on YouTube.
// @description:ja YouTubeの字幕を太字にして見やすくします。
// @description:zh-CN 将YouTube上的字幕放成粗体字，让人更容易看清。
// @include https://www.youtube.com/*
// @include https://www.youtube-nocookie.com/embed/*
// @exclude https://www.youtube.com/live_chat*
// @exclude https://www.youtube.com/live_chat_replay*
// @version 1.1.0
// @grant none
// ==/UserScript==
(function(){
const SCRIPTID = 'YouTubeBolderSubtitles';
const SCRIPTNAME = 'YouTube Bolder Subtitles';
const DEBUG = false;/*
[update]
Also available on embedded videos on youtube-nocookie.com. Internal code preparation.
[bug]
[todo]
デフォルトのオプションをクリックできないようにしとくか
元々の太字には文字の大きさとかで対処する？
もうちょっと込み入った背景のスクショで見やすさを強調したい
[possible]
設定パネルでカスタマイズ？
YouTubeの設定パネルに選択肢を差し込む？
[research]
normalizeが必要なのはABCやNBCなどのテレビ局が独自に挿入する字幕システムのせいっぽい？ (Bob the Canadian のライブに付く自動字幕は問題なかった)
と思ったら、動画でもあったはず。URL失念。
[memo]
*/
if(window === top && console.time) console.time(SCRIPTID);
const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
const site = {
targets: {
title: () => $('title'),
},
get: {
moviePlayer: () => $('#movie_player'),
captionWindow: (player) => player.querySelector('.caption-window'),
},
};
let elements = {}, flags = {}, timers = {}, sizes = {}, panels, configs;
const core = {
initialize: function(){
elements.html = document.documentElement;
elements.html.classList.add(SCRIPTID);
//core.observeTitle();
//core.observeCaption();
core.addStyle('style');
},
observeTitle: function(){
observe(elements.title, function(records){
log('Title has changed:', elements.title.textContent);
}, {childList: true, subtree: true, characterData: true});
},
observeCaption: function(){
// 100msくらいにスロットルする？
// 時刻が変わっても検知してしまうのでは・・・
// observeを二重構造にしてcaptionを発見するごとにcaptionを監視する？
const player = site.get.moviePlayer();
observe(player, function(records){
const caption = site.get.captionWindow(player);
if(caption) caption.normalize();
}, {childList: true, subtree: true, characterData: true});
},
addStyle: function(name = 'style', d = document){
if(html[name] === undefined) return;
if(!d.head) return d.addEventListener('load', (e) => core.addStyle(name, d), {once: true});
let style = createElement(html[name]()), id = SCRIPTID + '-' + name;
style.id = id;
Array.from(d.styleSheets).forEach(s => s.ownerNode.id === id && d.head.removeChild(s.ownerNode));
d.head.appendChild(style);
},
};
const html = {
style: () => `
<style type="text/css">
.caption-window{
background: transparent !important;
overflow: visible !important;
}
.ytp-caption-segment{
text-shadow:
rgb(0,0,0) 0 0 .1em,
rgb(0,0,0) 0 0 .2em,
rgb(0,0,0) 0 0 .4em,
rgb(0,0,0) 0 0 .8em,
transparent 0 0 0
!important;
background: transparent !important;
font-weight: bold !important;
}
</style>
`,
};
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), requestIdleCallback = window.requestIdleCallback.bind(window);
const alert = window.alert.bind(window), confirm = window.confirm.bind(window), prompt = window.prompt.bind(window), getComputedStyle = window.getComputedStyle.bind(window), fetch = window.fetch.bind(window);
if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
const $ = function(s, f = undefined){
let target = document.querySelector(s);
if(target === null) return null;
return f ? f(target) : target;
};
const $$ = function(s, f = undefined){
let targets = document.querySelectorAll(s);
return f ? f(targets) : targets;
};
const createElement = function(html = '<div></div>'){
let outer = document.createElement('div');
outer.insertAdjacentHTML('afterbegin', html);
return outer.firstElementChild;
};
const observe = function(element, callback, options = {childList: true, subtree: false, characterData: false, attributes: false, attributeFilter: undefined}){
let observer = new MutationObserver(callback.bind(element));
observer.observe(element, options);
return observer;
};
const log = function(){
if(typeof DEBUG === 'undefined') return;
let l = log.last = log.now || new Date(), n = log.now = new Date();
let error = new Error(), line = log.format.getLine(error), callers = log.format.getCallers(error);
//console.log(error.stack);
console.log(
SCRIPTID + ':',
/* 00:00:00.000 */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
/* +0.000s */ '+' + ((n-l)/1000).toFixed(3) + 's',
/* :00 */ ':' + line,
/* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
/* caller */ (callers[1] || '') + '()',
...arguments
);
};
log.formats = [{
name: 'Firefox Scratchpad',
detector: /MARKER@Scratchpad/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Console',
detector: /MARKER@debugger/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Greasemonkey 3',
detector: /\/gm_scripts\//,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Greasemonkey 4+',
detector: /MARKER@user-script:/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Tampermonkey',
detector: /MARKER@moz-extension:/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 2,
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Chrome Console',
detector: /at MARKER \(<anonymous>/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
}, {
name: 'Chrome Tampermonkey',
detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?name=/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 1,
getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
}, {
name: 'Chrome Extension',
detector: /at MARKER \(chrome-extension:/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
}, {
name: 'Edge Console',
detector: /at MARKER \(eval/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
}, {
name: 'Edge Tampermonkey',
detector: /at MARKER \(Function/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
}, {
name: 'Safari',
detector: /^MARKER$/m,
getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
getCallers: (e) => e.stack.split('\n'),
}, {
name: 'Default',
detector: /./,
getLine: (e) => 0,
getCallers: (e) => [],
}];
log.format = log.formats.find(function MARKER(f){
if(!f.detector.test(new Error().stack)) return false;
//console.log('////', f.name, 'wants', 0/*line*/, '\n' + new Error().stack);
return true;
});
core.initialize();
if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
})();