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Auto typeset LaTeX math formulas on ChatGPT pages (OpenAI, new bing, you, etc.).
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// ==UserScript==
// @name ChatGPT LaTeX Auto Render (OpenAI, you, new bing, etc.)
// @version 0.5.1
// @author Scruel Tao
// @homepage https://github.com/scruel/tampermonkey-scripts
// @description Auto typeset LaTeX math formulas on ChatGPT pages (OpenAI, new bing, you, etc.).
// @description:zh-CN 自动渲染 ChatGPT 页面 (OpenAI, new bing, you 等) 上的 LaTeX 数学公式。
// @match https://chat.openai.com/*
// @match https://you.com/search?*&tbm=youchat*
// @match https://www.bing.com/search?*
// @namespace http://tampermonkey.net/
// @icon https://chat.openai.com/favicon.ico
// @grant none
// @noframes
// ==/UserScript==
'use strict';
const _parsed_mark = '_sc_parsed';
function queryAddNoParsed(query) {
return query + ":not([" + _parsed_mark + "])";
}
async function prepareScript() {
window._sc_typesetAfter = (element) => {};
window._sc_typeset = () => {
try {
const messages = window._sc_getMessages();
messages.forEach(msg => {
msg.setAttribute(_parsed_mark,'');
// Prevent conflict latex typeset (katex).
const katexEles = msg.querySelectorAll('.katex-display');
katexEles.forEach(e => {
const mlEle = e.querySelector(".katex-mathml");
e.parentElement.removeAttribute("class");
e.parentElement.innerHTML = mlEle.innerHTML;
});
// Typeset latex.
MathJax.typesetPromise([msg]);
window._sc_typesetAfter(msg);
});
} catch (e) {
console.warn(e);
}
}
window._sc_mutationHandler = (mutation) => {
if (mutation.oldValue === '') {
window._sc_typeset();
}
};
window._sc_chatLoaded = () => { return true; };
var afterMainOvservationStart = () => {window._sc_typeset();};
if (window.location.host == "www.bing.com") {
window._sc_getObserveElement = () => {
const ele = document.querySelector("#b_sydConvCont > cib-serp");
if (!ele) {return null;}
return ele.shadowRoot.querySelector("#cib-action-bar-main");
}
window._sc_getMessages = () => {
try {
const allChatTurn = document.querySelector("#b_sydConvCont > cib-serp").shadowRoot.querySelector("#cib-conversation-main").shadowRoot.querySelectorAll("#cib-chat-main > cib-chat-turn");
const allCibMsgGroup = allChatTurn[allChatTurn.length - 1].shadowRoot.querySelectorAll("cib-message-group");
const allCibMsg = Array.from(allCibMsgGroup).map(e => Array.from(e.shadowRoot.querySelectorAll("cib-message"))).flatMap(e => e);
return Array.from(allCibMsg).map(cibMsg => cibMsg.shadowRoot.querySelector("cib-shared")).filter(e => e);
} catch (ignore) {
return [];
}
}
}
else if (window.location.host == "chat.openai.com") {
window._sc_getMessages = () => {
return document.querySelectorAll(queryAddNoParsed("div.w-full div.text-base div.items-start"));
}
window._sc_getObserveElement = () => {
return document.querySelector("main form textarea+button");
}
window._sc_typesetAfter = (element) => { element.style.display = 'unset';}
window._sc_chatLoaded = () => { return document.querySelector('main div.text-sm>svg.animate-spin') === null; };
afterMainOvservationStart = () => {
window._sc_typeset();
// Handle conversation switch
new MutationObserver((mutationList) => {
mutationList.forEach(async (mutation) => {
if (mutation.addedNodes){
window._sc_typeset();
startMainOvservation(await getMainObserveElement(true));
}
});
}).observe(document.querySelector('#__next'), {childList: true});
};
}
else if (window.location.host == "you.com") {
window._sc_getMessages = () => {
return document.querySelectorAll(queryAddNoParsed('#chatHistory div[data-testid="youchat-answer"]'));
}
window._sc_getObserveElement = () => {
return document.querySelector('main div[data-testid="youchat-input"] textarea+button');
}
}
console.log('Waiting for chat loading...')
const mainElement = await getMainObserveElement();
console.log('Chat loaded.')
startMainOvservation(mainElement);
afterMainOvservationStart();
}
function getMainObserveElement(chatLoaded=false) {
return new Promise(async (resolve, reject) => {
const resolver = () => {
const ele = window._sc_getObserveElement();
if (ele && (chatLoaded || window._sc_chatLoaded())) {
return resolve(ele);
}
window.setTimeout(resolver, 500);
}
resolver();
});
}
async function startMainOvservation(mainElement) {
const observerOptions = {
attributeOldValue : true,
attributeFilter: ['cancelable', 'disabled'],
};
const callback = (mutationList, observer) => {
mutationList.forEach(mutation => {
window._sc_mutationHandler(mutation);
});
};
if (window._sc_mainObserver) {
window._sc_mainObserver.disconnect();
}
window._sc_mainObserver = new MutationObserver(callback);
window._sc_mainObserver.observe(mainElement, observerOptions);
}
async function addScript(url) {
const scriptElement = document.createElement('script');
const headElement = document.getElementsByTagName('head')[0] || document.documentElement;
if (!headElement.appendChild(scriptElement)) {
// Prevent appendChild overwritten problem.
headElement.append(scriptElement);
}
scriptElement.src = url;
}
async function waitMathJaxLoaded() {
while (!MathJax.hasOwnProperty('typeset')) {
if (window._sc_ChatLatex.loadCount > 20000 / 200) {
setTipsElementText("Failed to load MathJax, try refresh.", true);
}
await new Promise((x) => setTimeout(x, 500));
window._sc_ChatLatex.loadCount += 1;
}
}
function showTipsElement() {
const tipsElement = window._sc_ChatLatex.tipsElement;
tipsElement.style.position = "fixed";
tipsElement.style.left = "10px";
tipsElement.style.bottom = "10px";
tipsElement.style.background = '#333';
tipsElement.style.color = '#fff';
document.body.appendChild(tipsElement);
}
function setTipsElementText(text, errorRaise=false) {
window._sc_ChatLatex.tipsElement.innerHTML = text;
if (errorRaise) {
throw text;
}
console.log(text);
}
function hideTipsElement(timeout=3) {
window.setTimeout(() => {window._sc_ChatLatex.tipsElement.hidden=true; }, 3000);
}
async function loadMathJax() {
showTipsElement();
setTipsElementText("Loading MathJax...");
addScript('https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js');
await waitMathJaxLoaded();
setTipsElementText("MathJax Loaded.");
hideTipsElement();
}
(async function() {
window._sc_ChatLatex = {
tipsElement: document.createElement("div"),
loadCount: 0
};
window.MathJax = {
tex: {
inlineMath: [['$', '$'], ['\\(', '\\)']],
displayMath : [['$$', '$$', ['\\[', '\\]']]]
},
startup: {
typeset: false
}
};
await loadMathJax();
await prepareScript();
})();