// ==UserScript==
// @name Youtube Subtitle Downloader v11
// @include https://*youtube.com/*
// @author Cheng Zheng
// @copyright 2009 Tim Smart; 2011 gw111zz; 2013~2017 Cheng Zheng;
// @license GNU GPL v3.0 or later. http://www.gnu.org/copyleft/gpl.html
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @version 11
// @grant GM_xmlhttpRequest
// @namespace https://greasyfork.org/users/5711
// @description download youtube COMPLETE subtitle (v10 Major Update: now support Youtube new Material Design!)
// ==/UserScript==
/*
Sometime it may not work(rarely), TRY Refresh. if is still got problem. email me.
Author : Cheng Zheng
Email : guokrfans@gmail.com
Github : https://github.com/1c7/Youtube-Auto-Subtitle-Download
Blog : 1c7.me
Some code comments are in Chinese.
*/
// CONFIG
var NO_SUBTITLE = 'No captions.';
var HAVE_SUBTITLE = 'Download captions.';
var first_load = true;
// return true / false
// Detect [new version UI(material design)] OR [old version UI]
// I tested this, accurated.
function new_material_design_version(){
var old_title_element = document.getElementById('watch7-headline');
if(old_title_element){
return false;
} else {
return true;
}
}
// trigger when first load (hit refresh button)
$(document).ready(function(){
// because document ready still not enough
// it's still too early, we have to wait certain element exist, then execute function.
if(new_material_design_version()){
var material_checkExist = setInterval(function() {
if (document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer').length) {
init();
clearInterval(material_checkExist);
}
}, 330);
} else {
var checkExist = setInterval(function() {
if ($('#watch7-headline').length) {
init();
clearInterval(checkExist);
}
}, 330);
}
});
// trigger when loading new page (actually this would also trigger when first loading, that's not what we want, that's why we need to use firsr_load === false)
// (new Material design version would trigger this "yt-navigate-finish" event. old version would not.)
var body = document.getElementsByTagName("body")[0];
body.addEventListener("yt-navigate-finish", function(event) {
if(first_load === false){
remove_subtitle_download_button();
init();
}
});
// trigger when loading new page
// (old version would trigger this "spfdone" event. new Material design version not sure yet.)
window.addEventListener("spfdone", function(e) {
if(current_page_is_video_page()){
remove_subtitle_download_button();
var checkExist = setInterval(function() {
if ($('#watch7-headline').length) {
init();
clearInterval(checkExist);
}
}, 330);
}
});
// return true / false
function current_page_is_video_page(){
return get_video_id() !== null;
}
// return string like "RW1ChiWyiZQ", from "https://www.youtube.com/watch?v=RW1ChiWyiZQ"
// or null
function get_video_id(){
return getURLParameter('v');
}
//https://stackoverflow.com/questions/11582512/how-to-get-url-parameters-with-javascript/11582513#11582513
function getURLParameter(name) {
return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search) || [null, ''])[1].replace(/\+/g, '%20')) || null;
}
function remove_subtitle_download_button(){
$('#youtube-subtitle-downloader-by-1c7').remove();
}
function init(){
unsafeWindow.caption_array = [];
inject_our_script();
first_load = false;
}
function inject_our_script(){
var div = document.createElement('div'),
select = document.createElement('select'),
option = document.createElement('option'),
controls = document.getElementById('watch7-headline'); // Youtube video title DIV
if (new_material_design_version()){
div.setAttribute('style', `display: table;
margin-top:4px;
border: 1px solid rgb(0, 183, 90);
cursor: pointer; color: rgb(255, 255, 255);
border-top-left-radius: 3px;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
border-bottom-left-radius: 3px;
background-color: #00B75A;
padding: 4px;
padding-right: 8px;
`);
} else {
div.setAttribute('style', `display: table;
margin-top:4px;
border: 1px solid rgb(0, 183, 90);
cursor: pointer; color: rgb(255, 255, 255);
border-top-left-radius: 3px;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
border-bottom-left-radius: 3px;
background-color: #00B75A;
padding: 3px;
padding-right: 8px;
`);
}
div.id = 'youtube-subtitle-downloader-by-1c7';
select.id = 'captions_selector';
select.disabled = true;
select.setAttribute( 'style', 'display:block; border: 1px solid rgb(0, 183, 90); cursor: pointer; color: rgb(255, 255, 255); background-color: #00B75A;');
option.textContent = 'Loading...';
option.selected = true;
select.appendChild(option);
select.addEventListener('change', function() {
download_subtitle(this);
}, false);
div.appendChild(select);
// put <select> into <div>
// put the div into page: new material design
var title_element = document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer');
if (title_element){
$(title_element[0]).after(div);
}
// put the div into page: old version
if(controls){
controls.appendChild(div);
}
load_language_list(select);
// <a> element is for download
var a = document.createElement('a');
a.style.cssText = 'display:none;';
a.setAttribute("id", "ForSubtitleDownload");
var body = document.getElementsByTagName('body')[0];
body.appendChild(a);
}
function download_subtitle(selector) {
var caption = caption_array[selector.selectedIndex - 1];
if (!caption) return;
var language_name_1c7 = caption.lang_name;
var url = 'https://video.google.com/timedtext?hl=' + caption.lang_code + '&lang=' + caption.lang_code + '&name=' + caption.name + '&v=' + get_video_id();
jQuery.get(url).done(function(r){
var text = r.getElementsByTagName('text');
// 拿所有 text 节点
var result = "";
var BOM = "\uFEFF";
result = BOM + result;
// 保存结果的字符串
for(var i=0; i<text.length; i++){
var index = i+1;
// 这个是字幕的索引, 从1开始的, 但是因为我们的循环是从0开始的, 所以加个1
var content = text[i].textContent.replace(/\n/g, " ");
// content 保存的是字幕内容 - 这里把换行换成了空格, 因为 Youtube 显示的多行字幕中间会有个\n, 如果不加这个replace. 两行的内容就会黏在一起.
var start = text[i].getAttribute('start');
var end = $(text[i+1]).attr('start');
if(!end){
end = start + 5;
}
// ==== 开始处理数据, 把数据保存到result里. ====
result = result + index + escape('\r\n');
// 把序号加进去
var start_time = process_time( parseFloat(start) );
result = result + start_time;
// 拿到 开始时间 之后往result字符串里存一下
result = result + ' --> ';
// 标准srt时间轴: 00:00:01,850 --> 00:00:02,720
// 我们现在加个中间的箭头..
var end_time = process_time( parseFloat(end) );
result = result + end_time + escape('\r\n');
// 拿到 结束时间 之后往result字符串里存一下
result = result + content + escape('\r\n\r\n');
// 加字幕内容
}
result = result.replace(/'/g, "'");
// 字幕里会有html实体字符..所以我们替换掉
var title = get_file_name(language_name_1c7);
downloadFile(title, result);
// 下载
}).fail(function() {
alert("Error: No response from server.");
});
selector.options[0].selected = true;
// 下载后把 <select> 选回第一个元素. 也就是 Download captions.
}
// Return something like: "(English)How Did Python Become A Data Science Powerhouse?.srt"
function get_file_name(language_name){
if(new_material_design_version()){
var title_element = document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer');
var video_name = title_element[0].childNodes[0].data;
return '(' + language_name + ')' + video_name + '.srt';
} else {
return '(' + language_name + ')' + unsafeWindow.ytplayer.config.args.title + '.srt';
}
}
// 载入有多少种语言, 然后加到 <select> 里
function load_language_list (select) {
GM_xmlhttpRequest({
method: 'GET',
url: 'https://video.google.com/timedtext?hl=en&v=' + get_video_id() + '&type=list',
onload: function( xhr ) {
var caption, option, caption_info,
captions = new DOMParser().parseFromString(xhr.responseText, "text/xml").getElementsByTagName('track');
if (captions.length === 0) {
select.options[0].textContent = NO_SUBTITLE;
if (new_material_design_version()){
$('#youtube-subtitle-downloader-by-1c7').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color','#95a5a6').css('padding','6px');
$('#captions_selector').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color','#95a5a6');
} else {
$('#youtube-subtitle-downloader-by-1c7').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color','#95a5a6').css('padding','5px');
$('#captions_selector').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color','#95a5a6');
}
return false;
}
for (var i = 0, il = captions.length; i < il; i++) {
caption = captions[i];
option = document.createElement('option');
caption_info = {
name: caption.getAttribute('name'),
lang_code: caption.getAttribute('lang_code'),
lang_name: caption.getAttribute('lang_translated')
};
caption_array.push(caption_info);
// 注意这里是加到 caption_array, 一个全局变量, 我们待会要依靠它来下载.
option.textContent = caption_info.lang_name;
select.appendChild(option);
}
select.options[0].textContent = HAVE_SUBTITLE;
select.disabled = false;
}
});
}
// 处理时间. 比如 start="671.33" start="37.64" start="12" start="23.029"
// 处理成 srt 时间, 比如 00:00:00,090 00:00:08,460 00:10:29,350
function process_time(s){
s = s.toFixed(3);
// 超棒的函数, 不论是整数还是小数都给弄成3位小数形式
// 举个柚子:
// 671.33 -> 671.330
// 671 -> 671.000
// 注意函数会四舍五入. 具体读文档
var array = s.split('.');
// 把开始时间根据句号分割
// 671.330 会分割成数组: [671, 330]
var Hour = 0;
var Minute = 0;
var Second = array[0]; // 671
var MilliSecond = array[1]; // 330
// 先声明下变量, 待会把这几个拼好就行了
// 我们来处理秒数. 把"分钟"和"小时"除出来
if(Second >= 60){
Minute = Math.floor(Second / 60);
Second = Second - Minute * 60;
// 把 秒 拆成 分钟和秒, 比如121秒, 拆成2分钟1秒
Hour = Math.floor(Minute / 60);
Minute = Minute - Hour * 60;
// 把 分钟 拆成 小时和分钟, 比如700分钟, 拆成11小时40分钟
}
// 分钟，如果位数不够两位就变成两位，下面两个if语句的作用也是一样。
if (Minute < 10){
Minute = '0' + Minute;
}
// 小时
if (Hour < 10){
Hour = '0' + Hour;
}
// 秒
if (Second < 10){
Second = '0' + Second;
}
return Hour + ':' + Minute + ':' + Second + ',' + MilliSecond;
}
function downloadFile(fileName, content){
var TITLE = unsafeWindow.ytplayer.config.args.title; // Video title
var version = getChromeVersion();
// dummy element for download
if ($('#youtube-subtitle-downloader-dummy-element-for-download').length > 0) {
}else{
$("body").append('<a id="youtube-subtitle-downloader-dummy-element-for-download"></a>');
}
var dummy = $('#youtube-subtitle-downloader-dummy-element-for-download');
// 判断 Chrome 版本选择下载方法，Chrome 52 和 53 的文件下载方式不一样
if (version > 52){
dummy.attr('download', fileName);
dummy.attr('href','data:Content-type: text/plain,' + content);
dummy[0].click();
} else {
downloadViaBlob(fileName, content);
}
}
// 复制自： http://www.alloyteam.com/2014/01/use-js-file-download/
// Chrome 53 之后这个函数失效。52有效。
function downloadViaBlob(fileName, content){
var aLink = document.createElement('a');
var blob = new Blob([content]);
var evt = document.createEvent("HTMLEvents");
evt.initEvent("click", false, false);
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.dispatchEvent(evt);
}
//http://stackoverflow.com/questions/4900436/how-to-detect-the-installed-chrome-version
function getChromeVersion() {
var raw = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
return raw ? parseInt(raw[2], 10) : false;
}
