Toggle translation for YouTube and VK videos with a fixed translation box
// ==UserScript==
// @name YouTube VK Toggle Translation for French, German, Russian, Ukrainian
// @namespace http://tampermonkey.net/
// @version 2.0
// @license Unlicense
// @description Toggle translation for YouTube and VK videos with a fixed translation box
// @author Jim Chen
// @homepage https://jimchen.me
// @match https://www.youtube.com/*
// @match https://m.youtube.com/*
// @match https://m.youtube.com/*
// @match https://www.youtube-nocookie.com/*
// @match https://vkvideo.ru/*
// @run-at document-idle
// ==/UserScript==
(function () {
"use strict";
let lastUrl = location.href;
const observer = new MutationObserver(() => {
if (location.href !== lastUrl) {
lastUrl = location.href;
handleVideoNavigation();
}
});
observer.observe(document.body, { childList: true, subtree: true });
handleVideoNavigation();
// Function to remove existing subtitle and translation elements
function cleanupSubtitles() {
const captionWindows = document.querySelectorAll(".caption-window");
captionWindows.forEach((window) => window.remove());
}
async function handleVideoNavigation() {
// Clean up existing subtitles before adding new ones
cleanupSubtitles();
let subtitleURL;
if (window.location.href.includes("youtube.com")) {
subtitleURL = await extractSubtitleUrlYouTube();
} else {
subtitleURL = await extractSubtitleUrlVK();
}
if (!subtitleURL) return;
if (window.location.href.includes("youtube.com")) {
await addOneSubtitleYouTube(subtitleURL);
} else {
await addOneSubtitleVK(subtitleURL, 5, 1000);
}
}
async function extractSubtitleUrlYouTube() {
function extractYouTubeVideoID() {
const url = window.location.href;
const patterns = {
standard: /(?:https?:\/\/)?(?:www\.)?youtube\.com\/watch\?v=([^&]+)/,
embed: /(?:https?:\/\/)?(?:www\.)?youtube\.com\/embed\/([^?]+)/,
mobile: /(?:https?:\/\/)?m\.youtube\.com\/watch\?v=([^&]+)/,
nocookie: /(?:https?:\/\/)?(?:www\.)?youtube-nocookie\.com\/embed\/([^?]+)/,
};
let videoID = null;
if (patterns.standard.test(url)) {
videoID = url.match(patterns.standard)[1];
} else if (patterns.embed.test(url)) {
videoID = url.match(patterns.embed)[1];
} else if (patterns.mobile.test(url)) {
videoID = url.match(patterns.mobile)[1];
} else if (patterns.nocookie.test(url)) {
videoID = url.match(patterns.nocookie)[1];
}
return videoID;
}
let videoID = extractYouTubeVideoID();
if (videoID == null) return;
const playerData = await new Promise((resolve) => {
const checkForPlayer = () => {
let ytAppData = document.querySelector("#movie_player");
let captionData = ytAppData?.getPlayerResponse()?.captions?.playerCaptionsTracklistRenderer?.captionTracks;
if (captionData) {
const fetchedBaseUrl = captionData[0].baseUrl;
const fetchedVideoID = fetchedBaseUrl.match(/[?&]v=([^&]+)/)?.[1];
if (fetchedVideoID !== videoID) setTimeout(checkForPlayer, 1000);
else resolve(captionData);
} else setTimeout(checkForPlayer, 1000);
};
checkForPlayer();
});
if (!playerData) return;
const hasForeignTrack = playerData.some(({ vssId }) => /(ru|uk|de|fr)/.test(vssId));
if (hasForeignTrack) {
const autoGeneratedTrack = playerData.find((track) => ["a.ru", "a.uk", "a.de", "a.fr"].includes(track.vssId));
const manualTrack = playerData.find((track) => ["ru", "uk", "de", "fr"].some((code) => track.vssId.includes(code)));
const otherTrack = autoGeneratedTrack || manualTrack;
if (!otherTrack) return;
return `${otherTrack.baseUrl}&fmt=vtt`;
}
}
async function extractSubtitleUrlVK() {
const url = window.location.href;
const vkPattern = /(?:https?:\/\/)?(?:www\.)?vkvideo\.ru\/video-?\d+_(\d+)/;
const vkMatch = url.match(vkPattern);
if (!vkMatch) return null;
const subtitleElement = document.querySelector('[id^="vk_external_ru_"]');
if (subtitleElement) {
const subtitleUrl = subtitleElement.getAttribute("src");
if (subtitleUrl) return subtitleUrl;
}
return await new Promise((resolve) => {
const checkForSubtitle = () => {
const subtitleElement = document.querySelector('[id^="vk_external_ru_"]');
if (subtitleElement) {
const subtitleUrl = subtitleElement.getAttribute("src");
if (subtitleUrl) resolve(subtitleUrl);
else resolve(null);
} else {
setTimeout(checkForSubtitle, 1000);
}
};
checkForSubtitle();
});
}
async function addOneSubtitleYouTube(url, maxRetries = 5, delay = 1000) {
let currentVideo = document.querySelector("video");
if (!currentVideo) return;
try {
console.log(`[Dual Subs] Starting Step 1, Subtitle URL ${url}`);
const response = await fetch(url);
const subtitleData = await response.text();
function parseVTTTime(timeStr) {
const parts = timeStr.split(/[:.]/);
return parseInt(parts[0]) * 3600 + parseInt(parts[1]) * 60 + parseInt(parts[2]) + parseInt(parts[3]) / 1000;
}
function parseVTT(subtitleData) {
const subtitleQueue = [];
const lines = subtitleData.trim().split("\n");
let i = 0;
while (i < lines.length && !lines[i].includes("-->")) i++;
while (i < lines.length) {
const line = lines[i].trim();
if (!line) {
i++;
continue;
}
const timeMatch = line.match(/(\d+:\d+:\d+\.\d+)\s+-->\s+(\d+:\d+:\d+\.\d+)/);
if (timeMatch) {
const start = parseVTTTime(timeMatch[1]);
const end = parseVTTTime(timeMatch[2]);
const textLines = [];
i++;
while (i < lines.length && lines[i].trim()) {
textLines.push(lines[i].trim());
i++;
}
if (textLines.length > 0) {
subtitleQueue.push({ start, end, textLines });
}
} else {
i++;
}
}
return subtitleQueue;
}
const subtitleQueue = parseVTT(subtitleData);
console.log(`[Dual Subs] Starting Step 2, Trying to Insert Subtitle Element`);
function createCaptionWindow() {
const videoPlayer = document.querySelector(".html5-video-player");
if (!videoPlayer) {
console.error("HTML5 video player not found");
return null;
}
const captionWindow = document.createElement("div");
captionWindow.className = "caption-window ytp-caption-window-bottom";
captionWindow.style.cssText = `
touch-action: none;
text-align: center;
position: absolute;
left: 50%;
transform: translateX(-50%);
bottom: 10%;
width: 90%;
max-width: 800px;
`;
const captionsText = document.createElement("span");
captionsText.className = "captions-text";
captionsText.style.cssText = "overflow-wrap: normal; display: block;";
const captionVisualLine = document.createElement("span");
captionVisualLine.className = "caption-visual-line";
captionVisualLine.style.cssText = "display: block;";
const ytpCaptionSegment = document.createElement("span");
ytpCaptionSegment.className = "ytp-caption-segment";
ytpCaptionSegment.style.cssText = `
display: inline-block;
white-space: pre-wrap;
background: rgba(8, 8, 8, 0.75);
font-size: 2.5vw;
color: rgb(255, 255, 255);
fill: rgb(255, 255, 255);
`;
const translationBox = document.createElement("div");
translationBox.className = "translation-box";
translationBox.style.cssText = `
position: absolute;
background: rgba(0, 0, 0, 0.9);
color: white;
padding: 8px;
border-radius: 4px;
font-size: 24px;
top: -40px;
left: 50%;
transform: translateX(-50%);
z-index: 9999;
display: none;
transition: opacity 0.1s ease;
opacity: 1;
`;
captionWindow.appendChild(translationBox);
captionVisualLine.appendChild(ytpCaptionSegment);
captionsText.appendChild(captionVisualLine);
captionWindow.appendChild(captionsText);
videoPlayer.appendChild(captionWindow);
return { ytpCaptionSegment, translationBox };
}
const { ytpCaptionSegment, translationBox } = createCaptionWindow() || {};
if (!ytpCaptionSegment || !translationBox) return;
currentVideo.addEventListener("timeupdate", () => {
const currentTime = currentVideo.currentTime;
const currentSubtitle = subtitleQueue.find((sub) => currentTime >= sub.start && currentTime <= sub.end);
updateSubtitle(currentSubtitle);
});
const translationCache = new Map();
async function translateText(text, targetLang = "en") {
if (translationCache.has(text)) return translationCache.get(text);
try {
const url = `https://translate.googleapis.com/translate_a/single?client=gtx&sl=auto&tl=${targetLang}&dt=t&q=${encodeURIComponent(text)}`;
const response = await fetch(url);
const data = await response.json();
const translatedText = data[0][0][0];
translationCache.set(text, translatedText);
return translatedText;
} catch (error) {
console.error("[Dual Subs] Translation error:", error);
return text;
}
}
function debounce(func, wait) {
let timeout;
return function (...args) {
clearTimeout(timeout);
timeout = setTimeout(() => func.apply(this, args), wait);
};
}
let currentTranslation = {
word: null,
translation: null,
visible: false,
};
function updateSubtitle(currentSubtitle) {
while (ytpCaptionSegment.firstChild) ytpCaptionSegment.removeChild(ytpCaptionSegment.firstChild);
if (!currentTranslation.visible) {
translationBox.style.display = "none";
} else {
translationBox.textContent = currentTranslation.translation;
translationBox.style.display = "block";
}
if (!currentSubtitle) {
ytpCaptionSegment.style.display = "none";
return;
}
ytpCaptionSegment.style.display = "inline-block";
currentSubtitle.textLines.forEach((line) => {
const lineSpan = document.createElement("span");
lineSpan.style.display = "block";
if (line.includes("<c>")) {
const currentTime = currentVideo.currentTime;
const timeTagRegex = /<(\d{2}:\d{2}:\d{2}\.\d{3})><c>(.*?)<\/c>/g;
let lastIndex = 0;
let wordArray = [];
let timeArray = [];
let match;
while ((match = timeTagRegex.exec(line)) !== null) {
const timeStr = match[1];
const text = match[2];
const time = parseVTTTime(timeStr);
if (match.index > lastIndex) {
const untaggedText = line.slice(lastIndex, match.index).trim();
if (untaggedText) {
wordArray.push(untaggedText);
timeArray.push(currentSubtitle.start);
}
}
wordArray.push(text);
timeArray.push(time);
lastIndex = timeTagRegex.lastIndex;
}
if (lastIndex < line.length) {
const untaggedText = line.slice(lastIndex).trim();
if (untaggedText) {
wordArray.push(untaggedText);
timeArray.push(currentSubtitle.start);
}
}
let currentWordIndex = 0;
for (let i = 0; i < wordArray.length; i++) {
if (currentTime >= timeArray[i]) currentWordIndex = i;
else break;
}
wordArray.forEach((word, index) => {
const wordSpan = document.createElement("span");
wordSpan.textContent = word + " ";
wordSpan.className = "subtitle-word";
wordSpan.style.cursor = "pointer";
if (index < currentWordIndex) {
wordSpan.style.color = "#ffffff";
} else if (index === currentWordIndex && currentTime >= timeArray[index]) {
const startTime = timeArray[index];
const endTime = index + 1 < timeArray.length ? timeArray[index + 1] : currentSubtitle.end;
const progress = (currentTime - startTime) / (endTime - startTime);
wordSpan.style.cssText = `
background: linear-gradient(to right, #ffffff 50%, #888888 50%);
background-size: 200% 100%;
background-position: ${100 - progress * 100}%;
color: transparent;
background-clip: text;
-webkit-background-clip: text;
transition: background-position 0.1s linear;
`;
} else {
wordSpan.style.color = "#888888";
}
const showTranslation = debounce(async () => {
const translation = await translateText(word);
translationBox.textContent = translation;
translationBox.style.display = "block";
}, 200);
wordSpan.addEventListener("mouseenter", async () => {
currentTranslation.word = word;
currentTranslation.visible = true;
if (!translationCache.has(word)) {
const translation = await translateText(word);
translationBox.textContent = translation;
currentTranslation.translation = translation;
} else {
translationBox.textContent = translationCache.get(word);
currentTranslation.translation = translationCache.get(word);
}
translationBox.style.display = "block";
});
wordSpan.addEventListener("mouseleave", () => {
currentTranslation.visible = false;
translationBox.style.display = "none";
});
lineSpan.appendChild(wordSpan);
});
} else {
const words = line.split(" ");
words.forEach((word) => {
const wordSpan = document.createElement("span");
wordSpan.textContent = word + " ";
wordSpan.className = "subtitle-word";
wordSpan.style.color = "#ffffff";
wordSpan.style.cursor = "pointer";
wordSpan.addEventListener("mouseenter", async () => {
currentTranslation.word = word;
currentTranslation.visible = true;
if (!translationCache.has(word)) {
const translation = await translateText(word);
translationBox.textContent = translation;
currentTranslation.translation = translation;
} else {
translationBox.textContent = translationCache.get(word);
currentTranslation.translation = translationCache.get(word);
}
translationBox.style.display = "block";
});
wordSpan.addEventListener("mouseleave", () => {
currentTranslation.visible = false;
translationBox.style.display = "none";
});
lineSpan.appendChild(wordSpan);
});
}
ytpCaptionSegment.appendChild(lineSpan);
});
}
const styleSheet = document.createElement("style");
styleSheet.textContent = `
@keyframes slideColor {
0% { background-position: 100%; }
100% { background-position: 0%; }
}
.subtitle-word:hover {
text-decoration: underline;
}
@media (max-width: 768px) {
.ytp-caption-segment {
font-size: 20px;
}
.translation-box {
font-size: 24px;
padding: 6px;
}
}
`;
document.head.appendChild(styleSheet);
console.log(`[Dual Subs] Subtitle and Translation Setup Complete`);
} catch (error) {
console.error("[Dual Subs] Error:", error);
if (maxRetries > 0) {
await new Promise((resolve) => setTimeout(resolve, delay));
return addOneSubtitleYouTube(url, maxRetries - 1, delay);
}
}
}
async function addOneSubtitleVK(url, maxRetries = 5, delay = 1000) {
let currentVideo = document.querySelector("video");
if (!currentVideo) return;
try {
console.log(`[Dual Subs VK] Starting Step 1, Subtitle URL ${url}`);
const response = await fetch(url);
const subtitleData = await response.text();
function parseVTTTime(timeStr) {
const parts = timeStr.split(/[:.]/);
return parseInt(parts[0]) * 3600 + parseInt(parts[1]) * 60 + parseInt(parts[2]) + parseInt(parts[3]) / 1000;
}
function parseVTT(subtitleData) {
const subtitleQueue = [];
const lines = subtitleData.trim().split("\n");
let i = 0;
while (i < lines.length && !lines[i].includes("-->")) i++;
while (i < lines.length) {
const line = lines[i].trim();
if (!line) {
i++;
continue;
}
const timeMatch = line.match(/(\d+:\d+:\d+\.\d+)\s+-->\s+(\d+:\d+:\d+\.\d+)/);
if (timeMatch) {
const start = parseVTTTime(timeMatch[1]);
const end = parseVTTTime(timeMatch[2]);
const textLines = [];
i++;
while (i < lines.length && lines[i].trim()) {
textLines.push(lines[i].trim());
i++;
}
if (textLines.length > 0) {
subtitleQueue.push({ start, end, textLines });
}
} else {
i++;
}
}
return subtitleQueue;
}
const subtitleQueue = parseVTT(subtitleData);
console.log(`[Dual Subs VK] Starting Step 2, Trying to Insert Subtitle Element for VK`);
function createCaptionWindow() {
const videoPlayer = document.querySelector(".videoplayer_media");
if (!videoPlayer) {
console.error("VK video player container not found");
return null;
}
const captionWindow = document.createElement("div");
captionWindow.className = "caption-window vk-caption-window-bottom";
captionWindow.style.cssText = `
touch-action: none;
text-align: center;
position: absolute;
left: 50%;
transform: translateX(-50%);
bottom: 10%;
width: 90%;
max-width: 800px;
`;
const captionsText = document.createElement("span");
captionsText.className = "captions-text";
captionsText.style.cssText = "overflow-wrap: normal; display: block;";
const captionVisualLine = document.createElement("span");
captionVisualLine.className = "caption-visual-line";
captionVisualLine.style.cssText = "display: block;";
const vkCaptionSegment = document.createElement("span");
vkCaptionSegment.className = "vk-caption-segment";
vkCaptionSegment.style.cssText = `
display: inline-block;
white-space: pre-wrap;
background: rgba(8, 8, 8, 0.75);
font-size: 2.5vw;
color: rgb(255, 255, 255);
fill: rgb(255, 255, 255);
`;
const translationBox = document.createElement("div");
translationBox.className = "translation-box";
translationBox.style.cssText = `
position: absolute;
background: rgba(0, 0, 0, 0.9);
color: white;
padding: 8px;
border-radius: 4px;
font-size: 24px;
top: -40px;
left: 50%;
transform: translateX(-50%);
z-index: 9999;
display: none;
transition: opacity 0.1s ease;
opacity: 1;
`;
captionWindow.appendChild(translationBox);
captionVisualLine.appendChild(vkCaptionSegment);
captionsText.appendChild(captionVisualLine);
captionWindow.appendChild(captionsText);
videoPlayer.appendChild(captionWindow);
return { vkCaptionSegment, translationBox };
}
const { vkCaptionSegment, translationBox } = createCaptionWindow() || {};
if (!vkCaptionSegment || !translationBox) return;
currentVideo.addEventListener("timeupdate", () => {
const currentTime = currentVideo.currentTime;
const currentSubtitle = subtitleQueue.find((sub) => currentTime >= sub.start && currentTime <= sub.end);
updateSubtitle(currentSubtitle);
});
const translationCache = new Map();
async function translateText(text, targetLang = "en") {
if (translationCache.has(text)) return translationCache.get(text);
try {
const url = `https://translate.googleapis.com/translate_a/single?client=gtx&sl=auto&tl=${targetLang}&dt=t&q=${encodeURIComponent(text)}`;
const response = await fetch(url);
const data = await response.json();
const translatedText = data[0][0][0];
translationCache.set(text, translatedText);
return translatedText;
} catch (error) {
console.error("[Dual Subs VK] Translation error:", error);
return text;
}
}
function debounce(func, wait) {
let timeout;
return function (...args) {
clearTimeout(timeout);
timeout = setTimeout(() => func.apply(this, args), wait);
};
}
let currentTranslation = {
word: null,
translation: null,
visible: false,
};
function updateSubtitle(currentSubtitle) {
while (vkCaptionSegment.firstChild) vkCaptionSegment.removeChild(vkCaptionSegment.firstChild);
if (!currentTranslation.visible) {
translationBox.style.display = "none";
} else {
translationBox.textContent = currentTranslation.translation;
translationBox.style.display = "block";
}
if (!currentSubtitle) {
vkCaptionSegment.style.display = "none";
return;
}
vkCaptionSegment.style.display = "inline-block";
currentSubtitle.textLines.forEach((line) => {
const lineSpan = document.createElement("span");
lineSpan.style.display = "block";
if (line.includes("<c>")) {
const currentTime = currentVideo.currentTime;
const timeTagRegex = /<(\d{2}:\d{2}:\d{2}\.\d{3})><c>(.*?)<\/c>/g;
let lastIndex = 0;
let wordArray = [];
let timeArray = [];
let match;
while ((match = timeTagRegex.exec(line)) !== null) {
const timeStr = match[1];
const text = match[2];
const time = parseVTTTime(timeStr);
if (match.index > lastIndex) {
const untaggedText = line.slice(lastIndex, match.index).trim();
if (untaggedText) {
wordArray.push(untaggedText);
timeArray.push(currentSubtitle.start);
}
}
wordArray.push(text);
timeArray.push(time);
lastIndex = timeTagRegex.lastIndex;
}
if (lastIndex < line.length) {
const untaggedText = line.slice(lastIndex).trim();
if (untaggedText) {
wordArray.push(untaggedText);
timeArray.push(currentSubtitle.start);
}
}
let currentWordIndex = 0;
for (let i = 0; i < wordArray.length; i++) {
if (currentTime >= timeArray[i]) currentWordIndex = i;
else break;
}
wordArray.forEach((word, index) => {
const wordSpan = document.createElement("span");
wordSpan.textContent = word + " ";
wordSpan.className = "subtitle-word";
wordSpan.style.cursor = "pointer";
if (index < currentWordIndex) {
wordSpan.style.color = "#ffffff";
} else if (index === currentWordIndex && currentTime >= timeArray[index]) {
const startTime = timeArray[index];
const endTime = index + 1 < timeArray.length ? timeArray[index + 1] : currentSubtitle.end;
const progress = (currentTime - startTime) / (endTime - startTime);
wordSpan.style.cssText = `
background: linear-gradient(to right, #ffffff 50%, #888888 50%);
background-size: 200% 100%;
background-position: ${100 - progress * 100}%;
color: transparent;
background-clip: text;
-webkit-background-clip: text;
transition: background-position 0.1s linear;
`;
} else {
wordSpan.style.color = "#888888";
}
wordSpan.addEventListener("mouseenter", async () => {
currentTranslation.word = word;
currentTranslation.visible = true;
if (!translationCache.has(word)) {
const translation = await translateText(word);
translationBox.textContent = translation;
currentTranslation.translation = translation;
} else {
translationBox.textContent = translationCache.get(word);
currentTranslation.translation = translationCache.get(word);
}
translationBox.style.display = "block";
});
wordSpan.addEventListener("mouseleave", () => {
currentTranslation.visible = false;
translationBox.style.display = "none";
});
lineSpan.appendChild(wordSpan);
});
} else {
const words = line.split(" ");
words.forEach((word) => {
const wordSpan = document.createElement("span");
wordSpan.textContent = word + " ";
wordSpan.className = "subtitle-word";
wordSpan.style.color = "#ffffff";
wordSpan.style.cursor = "pointer";
wordSpan.addEventListener("mouseenter", async () => {
currentTranslation.word = word;
currentTranslation.visible = true;
if (!translationCache.has(word)) {
const translation = await translateText(word);
translationBox.textContent = translation;
currentTranslation.translation = translation;
} else {
translationBox.textContent = translationCache.get(word);
currentTranslation.translation = translationCache.get(word);
}
translationBox.style.display = "block";
});
wordSpan.addEventListener("mouseleave", () => {
currentTranslation.visible = false;
translationBox.style.display = "none";
});
lineSpan.appendChild(wordSpan);
});
}
vkCaptionSegment.appendChild(lineSpan);
});
}
const styleSheet = document.createElement("style");
styleSheet.textContent = `
.vk-caption-window-bottom {
z-index: 999999 !important;
pointer-events: auto !important;
}
.vk-caption-segment {
z-index: 999999 !important;
pointer-events: auto !important;
}
.subtitle-word {
z-index: 999999 !important;
pointer-events: auto !important;
}
@keyframes slideColor {
0% { background-position: 100%; }
100% { background-position: 0%; }
}
.subtitle-word:hover {
text-decoration: underline;
}
@media (max-width: 768px) {
.vk-caption-segment {
font-size: 20px;
}
.translation-box {
font-size: 24px;
padding: 6px;
}
}
`;
document.head.appendChild(styleSheet);
console.log(`[Dual Subs VK] Subtitle and Translation Setup Complete`);
} catch (error) {
console.error("[Dual Subs VK] Error:", error);
if (maxRetries > 0) {
await new Promise((resolve) => setTimeout(resolve, delay));
return addOneSubtitleVK(url, maxRetries - 1, delay);
}
}
}
})();
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