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将 lynda.com 的字幕译为中文，支持搜狗、彩云、Google翻译接口
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// ==UserScript==
// @name lynda.com 字幕翻译
// @description 将 lynda.com 的字幕译为中文，支持搜狗、彩云、Google翻译接口
// @namespace https://github.com/journey-ad
// @version 0.2.2
// @author journey-ad
// @match *://www.lynda.com/*
// @license MIT
// @run-at document-end
// @grant GM_xmlhttpRequest
// ==/UserScript==
(function () {
"use strict";
var transServer = "caiyun"; // 配置翻译接口，可选值为 caiyun, sogou, google
var entries = null;
window.transTimer = window.setInterval(init, 100); // 用定时器检查待翻译文本是否已准备好
function init() {
if (unsafeWindow.mejs && getDeepProperty(mejs, "players.mep_0.selectedTrack")) {
window.clearInterval(window.transTimer); // 清除定时器
addTranslateBtn();
entries = mejs.players.mep_0.selectedTrack.entries;
Object.defineProperty(mejs.players.mep_0.selectedTrack, "entries", {
get: function get() {
return entries;
},
set: function set(data) {
entries = data;
if (entries.text) {
console.log("字幕文本可用");
transText();
}
}
});
console.log("字幕文本可用");
transText();
}
}
function addTranslateBtn() {
window.isTranslateEnable = true;
var controls = document.getElementsByClassName("mejs-controls")[0],
css = ".mejs-container .mejs-controls .mejs-button.translate {right: 110px;}@media (min-width: 768px){.mejs-container .mejs-controls .mejs-button.translate {right: 132px;}.mejs-container .mejs-controls .mejs-button.mejs-playback-rate-button {right: 166px;}}.modal.video-modal .modal-player-cont .mejs-container .mejs-controls .mejs-button.translate {right: 90px;}#translate-btn {height: 16px;margin-top: 2px;font-size: 16px;font-weight: bold;color: #ccc;transition: all .3s;}#translate-btn:hover {color: #fff;}#translate-btn.enable {color: #ffba00;}",
container = document.createElement("div");
if (typeof GM_addStyle != "undefined") {
GM_addStyle(css);
} else if (typeof PRO_addStyle != "undefined") {
PRO_addStyle(css);
} else if (typeof addStyle != "undefined") {
addStyle(css);
} else {
var node = document.createElement("style");
node.type = "text/css";
node.appendChild(document.createTextNode(css));
var heads = document.getElementsByTagName("head");
if (heads.length > 0) {
heads[0].appendChild(node);
} else {
// no head yet, stick it whereever
document.documentElement.appendChild(node);
}
}
controls.appendChild(container);
container.outerHTML = '<div class="mejs-button translate"><button class="enable" id="translate-btn" type="button">文</button></div>';
var transBtn = document.getElementById("translate-btn");
transBtn.addEventListener("click", function () {
transBtn.classList.toggle("enable");
window.isTranslateEnable = !window.isTranslateEnable;
}, false);
}
function transText() {
var s = "",
r = "",
arr = [],
num = 0,
count = 0,
subtitle = entries.text,
subtitleTrans = [];
subtitle.forEach(function (e) {
// 去除每条字幕的换行符并按行排列
s += e.replace(/\r?\n|\r/g, " ") + "\n";
});
num = translate(s, function (data, index) {
// 调用翻译方法并处理回调
count++;
arr[index] = data; // 按分块原始下标放回结果数组
if (count >= num) {
// 所有翻译文本已取回
r = arr.join("\n");
subtitleTrans = r.split("\n");
mejs.players.mep_0.displayCaptions = function () {
// 重写displayCaptions方法
var subtitle = null;
if ("undefined" != typeof mejs.players.mep_0.tracks) {
var t,
e = mejs.players.mep_0,
i = e.selectedTrack;
if (null !== i && i.isLoaded) {
for (t = 0; t < i.entries.times.length; t++) {
if (e.media.currentTime >= i.entries.times[t].start && e.media.currentTime <= i.entries.times[t].stop) {
if (window.isTranslateEnable) {
// 拼接双语字幕
subtitle = subtitleTrans[t] + "\n" + i.entries.text[t].replace(/\r?\n|\r/g, " ");
} else {
subtitle = i.entries.text[t];
}
return e.captionsText.html(subtitle).attr("class", "mejs-captions-text " + (i.entries.times[t].identifier || "")), void e.captions.show();
}
}
e.captions.hide();
} else e.captions.hide();
}
};
console.log(r);
console.log("使用 " + transServer + " 翻译完成");
}
});
}
function translate(str, callback) {
var textArr = [],
count = 1;
if (str.length > 5000) {
//大于5000字符分块翻译
var strArr = str.split("\n"),
i = 0;
strArr.forEach(function (v) {
textArr[i] = textArr[i] || "";
if ((textArr[i] + v).length > (i + 1) * 5000) {
// 若加上此行后长度超出5000字符则分块
i++;
textArr[i] = "";
}
textArr[i] += v + "\n";
});
count = i + 1; // 记录块的数量
} else {
textArr[0] = str;
}
textArr.forEach(function (text, index) {
// 遍历每块分别进行翻译
server[transServer]({
text: text,
index: index
}, callback);
});
return count; // 返回分块数量
}
var server = {
sogou: function sogou(r, callback) {
var KEY = "b33bf8c58706155663d1ad5dba4192dc"; // 硬编码于搜狗网页翻译js
var data = {
"from": "auto",
"to": "zh-CHS",
"client": "pc",
"fr": "browser_pc",
"text": r.text,
"pid": "sogou-dict-vr",
"useDetect": "on",
"useDetectResult": "on",
"oxford": "on",
"isReturnSugg": "on",
"needQc": 1,
"s": md5("autozh-CHS".concat(r.text).concat(KEY)) // 签名算法
};
GM_xmlhttpRequest({
method: "POST",
url: "https://fanyi.sogou.com/reventondc/translateV1",
headers: {
"accept": "application/json",
"content-type": "application/x-www-form-urlencoded; charset=UTF-8"
},
data: serialize(data),
onload: function onload(response) {
var result = JSON.parse(response.responseText);
callback(result.data.translate.dit, r.index); // 执行回调，在回调中拼接
}
});
},
caiyun: function caiyun(r, callback) {
var data = {
"source": r.text.split('\n'),
"trans_type": "en2zh",
"request_id": "web_fanyi",
"media": "text",
"os_type": "web",
"dict": true,
"cached": true,
"replaced": true
};
GM_xmlhttpRequest({
method: "POST",
url: "https://api.interpreter.caiyunai.com/v1/translator",
headers: {
"accept": "application/json",
"content-type": "application/json; charset=UTF-8",
"X-Authorization": "token:cy4fgbil24jucmh8jfr5"
},
data: JSON.stringify(data),
onload: function onload(response) {
var result = JSON.parse(response.responseText);
callback(result.target.join('\n'), r.index); // 执行回调，在回调中拼接
}
});
},
google: function google(r, callback) {
var data = {
"q": r.text,
"client": "webapp",
"sl": "auto",
"tl": "zh-CN",
"hl": "zh-CN",
"dt": "t",
"otf": 1,
"pc": 1,
"ssel": 0,
"tsel": 0,
"kc": 5,
"tk": tk(r.text)
};
GM_xmlhttpRequest({
method: "POST",
url: "https://translate.google.cn/translate_a/single",
headers: {
"accept": "application/json",
"content-type": "application/x-www-form-urlencoded; charset=UTF-8"
},
data: serialize(data),
onload: function onload(response) {
var result = JSON.parse(response.responseText),
arr = [];
result[0].forEach(function (t) {
t && arr.push(t[0]);
});
callback(arr.join(''), r.index); // 执行回调，在回调中拼接
}
});
}
};
function getDeepProperty(obj, propstr) {
var prop = propstr.split('.');
for (var i = 0; i < prop.length; i++) {
if (typeof obj === 'object') obj = obj[prop[i]];
}
return obj;
}
function serialize(obj) {
return Object.keys(obj).map(function (k) {
return encodeURIComponent(k) + "=" + encodeURIComponent(obj[k]).replace("%20", "+");
}).join("&");
}
function md5(str) {
var k = [],
i = 0;
for (i = 0; i < 64;) {
k[i] = 0 | Math.abs(Math.sin(++i)) * 4294967296;
}
var b,
c,
d,
j,
x = [],
str2 = unescape(encodeURI(str)),
a = str2.length,
h = [b = 1732584193, c = -271733879, ~b, ~c];
for (i = 0; i <= a;) {
x[i >> 2] |= (str2.charCodeAt(i) || 128) << 8 * (i++ % 4);
}
x[str = (a + 8 >> 6) * 16 + 14] = a * 8;
i = 0;
for (; i < str; i += 16) {
a = h;
j = 0;
for (; j < 64;) {
a = [d = a[3], (b = a[1] | 0) + ((d = a[0] + [b & (c = a[2]) | ~b & d, d & b | ~d & c, b ^ c ^ d, c ^ (b | ~d)][a = j >> 4] + (k[j] + (x[[j, 5 * j + 1, 3 * j + 5, 7 * j][a] % 16 + i] | 0))) << (a = [7, 12, 17, 22, 5, 9, 14, 20, 4, 11, 16, 23, 6, 10, 15, 21][4 * a + j++ % 4]) | d >>> 32 - a), b, c];
}
for (j = 4; j;) {
h[--j] = h[j] + a[j];
}
}
str = "";
for (; j < 32;) {
str += (h[j >> 3] >> (1 ^ j++ & 7) * 4 & 15).toString(16);
}
return str;
}
function tk(a) {
var tkk = '429175.1243284773',
Jo = null;
function Ho(a) {
return function () {
return a;
};
}
function Io(a, b) {
for (var c = 0; c < b.length - 2; c += 3) {
var d = b.charAt(c + 2);
d = "a" <= d ? d.charCodeAt(0) - 87 : Number(d);
d = "+" == b.charAt(c + 1) ? a >>> d : a << d;
a = "+" == b.charAt(c) ? a + d & 4294967295 : a ^ d;
}
return a;
}
if (null !== Jo) var b = Jo;
else {
b = Ho(String.fromCharCode(84));
var c = Ho(String.fromCharCode(75));
b = [b(), b()];
b[1] = c();
b = (Jo = tkk || "") || "";
}
var d = Ho(String.fromCharCode(116));
c = Ho(String.fromCharCode(107));
d = [d(), d()];
d[1] = c();
d = b.split(".");
b = Number(d[0]) || 0;
for (var e = [], f = 0, g = 0; g < a.length; g++) {
var k = a.charCodeAt(g);
128 > k ? e[f++] = k : (2048 > k ? e[f++] = k >> 6 | 192 : (55296 == (k & 64512) && g + 1 < a.length && 56320 == (a.charCodeAt(g + 1) & 64512) ? (k = 65536 + ((k & 1023) << 10) + (a.charCodeAt(++g) & 1023), e[f++] = k >> 18 | 240, e[f++] = k >> 12 & 63 | 128) : e[f++] = k >> 12 | 224, e[f++] = k >> 6 & 63 | 128), e[f++] = k & 63 | 128);
}
a = b;
for (f = 0; f < e.length; f++) {
a += e[f], a = Io(a, "+-a^+6");
}
a = Io(a, "+-3^+b+-f");
a ^= Number(d[1]) || 0;
0 > a && (a = (a & 2147483647) + 2147483648);
a %= 1E6;
return a.toString() + "." + (a ^ b);
}
})();