Greasy Fork is available in English.
Same as the name
// ==UserScript==
// @name YouTube 直播聊天实时翻译
// @version 1.5
// @author lslqtz
// @license GPL
// @grant GM.xmlHttpRequest
// @inject-into content
// @run-at document-end
// @match *://*.youtube.com/live_chat*
// @namespace http://greasyfork.icu/users/155581
// @description Same as the name
// ==/UserScript==
window.YTGMFetch = function (url, options = {}) {
return new Promise((resolve, reject) => {
const method = options.method || 'GET';
const headers = options.headers || {};
const body = options.body || null;
GM.xmlHttpRequest({
method: method,
url: url,
headers: headers,
data: body,
responseType: options.responseType || 'text',
onload: function (response) {
const fetchResponse = {
ok: response.status >= 200 && response.status < 300,
status: response.status,
statusText: response.statusText,
url: response.finalUrl,
text: () => Promise.resolve(response.responseText),
json: () => Promise.resolve(JSON.parse(response.responseText)),
blob: () => Promise.resolve(new Blob([response.response])),
arrayBuffer: () => Promise.resolve(response.response),
headers: {
get: (header) => {
const headersArray = response.responseHeaders.split('\r\n');
const headerMap = headersArray.reduce((acc, curr) => {
const [key, value] = curr.split(': ');
if (key && value) acc[key.toLowerCase()] = value;
return acc;
}, {});
return headerMap[header.toLowerCase()] || null;
},
},
};
resolve(fetchResponse);
},
onerror: function () {
reject(new TypeError('Network request failed.'));
},
ontimeout: function () {
reject(new TypeError('Network request timed out.'));
},
onabort: function () {
reject(new DOMException('The operation was aborted.', 'AbortError'));
},
});
});
};
window.ytTextEncoder = new TextEncoder();
window.ytIsSolvingCaptcha = false;
window.ytSymbolRegex = /^([\u{2190}-\u{21FF}]|[\u{2300}-\u{23FF}]|[\u{2460}-\u{24FF}]|[\u{2500}-\u{25FF}]|[\u{2600}-\u{26FF}]|[\u{2700}-\u{27BF}]|[\u{2B00}-\u{2BFF}]|[\u{1F000}-\u{1F02F}]|[\u{1F0A0}-\u{1F0FF}]|[\u{1F100}-\u{1F6FF}]|[\u{1F900}-\u{1FAFF}]|[\u{1FB00}-\u{1FBFF}]|[ !"#$%&'()*+,-./:;<=>?@\[\\\]^_`\{|\}~。，“”、：；？！〝〞〟～〜])+$/u;
// 停止翻译脚本.
function StopYouTubeLiveChatTranslator() {
console.log("停止 YouTube 直播聊天翻译脚本");
if (window.ytLiveChatInterval) {
clearInterval(window.ytLiveChatInterval);
console.log("已清除计时器");
}
if (window.ytObserver) {
window.ytObserver.disconnect();
window.ytObserver = null;
console.log("已清除观察器");
}
window.chatContainerNotFoundCount = 0;
window.ytIsSolvingCaptcha = false;
}
// 启动翻译脚本.
function StartYouTubeLiveChatTranslator() {
console.log("启动 YouTube 直播聊天翻译脚本");
// 启动定时器.
window.ytLiveChatInterval = setInterval(CheckAndObserveChatContainer, 1000);
}
function ShowReCaptchaPrompt(onResolved) {
if (window.ytIsSolvingCaptcha) {
return;
}
window.ytIsSolvingCaptcha = true;
// 创建提示框 HTML.
var promptBox = document.createElement("div");
promptBox.style = `
position: fixed; top: 20%; left: 50%; transform: translateX(-50%);
padding: 5px; width: 70%; background: white; border: 1px solid gray; box-shadow: 0 4px 8px rgba(0,0,0,0.2);
z-index: 10000; text-align: center; font-size: 16px;
`;
promptBox.innerHTML = `
<h3 style="margin-bottom: 15px;">YouTube 直播聊天实时翻译</h3>
<p style="margin-bottom: 15px;">HTTP 429: 检测到疑似频繁请求触发 reCaptcha 验证码验证.</p>
<p style="margin-bottom: 15px;">手动访问 <a href="https://translate.googleapis.com/translate_a/single" target="_blank" style="color: blue;">Google Translate API</a> 并完成验证码验证.</p>
<p style="margin-bottom: 15px;">完成验证后, 点按"我已完成", 即可继续开始翻译.</p>
<button id="ytRecaptchaResolvedButton">我已完成</button> <button id="ytDisableTranslation">停用翻译</button>
`;
document.body.appendChild(promptBox);
document.getElementById("ytRecaptchaResolvedButton").addEventListener("click", () => {
promptBox.remove();
window.ytIsSolvingCaptcha = false;
});
document.getElementById("ytDisableTranslation").addEventListener("click", () => {
promptBox.remove();
StopYouTubeLiveChatTranslator();
});
}
// Google Translate API 调用.
async function TranslateText(text, targetLang = 'zh-CN') {
console.log("翻译消息: " + text);
if (window.ytIsSolvingCaptcha) {
return "[翻译失败: 等待解决验证码]";
}
try {
var response = await YTGMFetch('https://translate.googleapis.com/translate_a/single?client=gtx&sl=auto&tl=' + targetLang + '&dt=t&q=' + encodeURIComponent(text));
if (!response.ok) {
console.error("翻译 API 请求失败", response.status, response.statusText);
if (response.status === 429) {
ShowReCaptchaPrompt();
return "[翻译失败: 疑似频繁请求触发 reCaptcha 验证码]";
}
return `[翻译失败: HTTP ${response.status} ${response.statusText}]`;
}
var result = await response.json();
if (!result || !result[0] || !Array.isArray(result[0])) {
return "[翻译失败: 无法解析翻译 API 返回的内容]";
}
return result[0].map(segment => segment[0]).join('');
} catch (error) {
console.error("翻译出错", error);
return "[翻译出错]";
}
}
// 解析消息内容, 过滤表情和图片, 并将它们替换为占位符.
function ExtractTextContent(element) {
var text = '';
var elements = element.childNodes;
var placeholders = []; // 存储占位符与原始内容的对应关系.
var hasText = false;
elements.forEach(function (node, index) {
if (node.nodeType === Node.TEXT_NODE) {
if (!hasText && !node.nodeValue.trim().split(/\r?\n/).every(line => window.ytSymbolRegex.test(line))) {
hasText = true;
}
text += node.nodeValue.trim();
} else if (node.nodeType === Node.ELEMENT_NODE) {
if (node.tagName.toLowerCase() === 'img' || (node.tagName.toLowerCase() === 'span' && node.classList.contains('emoji'))) {
var placeholder = `{{ytPH${index}}}`; // 使用占位符.
placeholders.push({ placeholder: placeholder, html: node.outerHTML });
text += placeholder; // 将表情或图片替换为占位符.
}
}
});
if (!hasText || (text.trim().length <= 2 && window.ytTextEncoder.encode(text.trim()).length <= 4)) {
return { text: "", placeholders: [] };
}
return { text: text.trim(), placeholders: placeholders };
}
// 重新将占位符替换为表情和图片.
function InsertPlaceholdersIntoTranslation(translatedMessage, placeholders) {
translatedMessage = translatedMessage.replace('{ {', '{{').replace('} }', '}}');
placeholders.forEach(function (placeholder) {
translatedMessage = translatedMessage.replace(new RegExp(placeholder.placeholder, 'gi'), placeholder.html);
});
return translatedMessage;
}
// 插入翻译后的消息.
function InsertTranslatedMessage(messageElement, translatedMessage) {
var translationElement = document.createElement('div');
translationElement.style.color = 'gray';
translationElement.style.fontSize = 'small';
translationElement.className = 'translated-message';
translationElement.innerHTML = "[翻译]: " + translatedMessage;
// 在原消息下方插入翻译内容.
messageElement.appendChild(translationElement);
}
// 检查并观察聊天容器.
function CheckAndObserveChatContainer() {
var chatContainer = document.querySelector('yt-live-chat-app');
if (chatContainer) {
if (!window.ytObserver) {
console.log("聊天容器找到: ", chatContainer);
ObserveChatUpdates(chatContainer);
TranslateInitialMessages(chatContainer);
}
} else if (window.ytObserver) {
if (window.chatContainerNotFoundCount++ >= 3) {
window.chatContainerNotFoundCount = 0;
window.ytObserver.disconnect();
window.ytObserver = null;
console.log("聊天容器已丢失, 停止以前监听的聊天更新");
}
}
}
// 翻译已有的最新 20 条消息.
async function TranslateInitialMessages(chatContainer) {
console.log("开始翻译已有消息...");
// 获取所有聊天消息节点.
var messages = chatContainer.querySelectorAll('yt-live-chat-text-message-renderer, yt-live-chat-paid-message-renderer');
var totalMessages = messages.length;
// 只处理最后的 10 条消息.
for (var i = Math.max(0, totalMessages - 10); i < totalMessages; i++) {
var messageNode = messages[i];
var messageElement = messageNode.querySelector('#message');
if (messageElement) {
// 跳过已翻译消息.
if (messageElement.querySelector('.translated-message')) {
console.log("消息已翻译，跳过: ", messageElement.textContent);
continue;
}
var { text, placeholders } = ExtractTextContent(messageElement);
if (text.length === 0) {
console.log("已有消息内容为空，跳过翻译");
continue;
}
console.log("已有消息: " + text);
var translatedMessage = await TranslateText(text);
if (translatedMessage.length === 0) {
console.log("翻译消息内容为空，跳过翻译");
continue;
}
console.log("翻译消息: " + text);
var finalMessage = InsertPlaceholdersIntoTranslation(translatedMessage, placeholders);
InsertTranslatedMessage(messageElement, finalMessage);
}
}
}
// 监听聊天消息更新.
function ObserveChatUpdates(chatContainer) {
window.ytObserver = new MutationObserver(async function (mutations) {
for (var i = 0; i < mutations.length; i++) {
var mutation = mutations[i];
if (mutation.type !== 'childList') {
continue;
}
mutation.addedNodes.forEach(async function (node) {
// 检查是否为聊天消息.
if (node.nodeType === 1 && (node.tagName.toLowerCase() === 'yt-live-chat-text-message-renderer' || node.tagName.toLowerCase() === 'yt-live-chat-paid-message-renderer')) {
var messageElement = node.querySelector('#message');
if (messageElement) {
// 跳过已翻译消息.
if (messageElement.querySelector('.translated-message')) {
console.log("消息已翻译，跳过: ", messageElement.textContent);
return;
}
// 提取文本并替换表情或图片为占位符.
var { text, placeholders } = ExtractTextContent(messageElement);
if (text.length === 0) {
console.log("消息内容为空, 跳过翻译");
return;
}
console.log("检测到新消息: " + text);
var translatedMessage = await TranslateText(text);
// 将翻译后的文本和表情或图片组合.
var finalMessage = InsertPlaceholdersIntoTranslation(translatedMessage, placeholders);
InsertTranslatedMessage(messageElement, finalMessage);
} else {
console.warn("未找到消息内容元素");
}
}
});
}
});
console.log("开始监听聊天更新...");
window.ytObserver.observe(chatContainer, { childList: true, subtree: true });
}
StopYouTubeLiveChatTranslator();
StartYouTubeLiveChatTranslator();