Copy selected text with equations in LaTeX format (Short cut: Ctrl+Alt+Shift+C).
// ==UserScript==
// @name LaTeX Copier
// @namespace http://tampermonkey.net/
// @version 1.9.7
// @description Copy selected text with equations in LaTeX format (Short cut: Ctrl+Alt+Shift+C).
// @author Jie-Qiao
// @match *://*.wikipedia.org/*
// @match *://*.stackexchange.com/*
// @match *://alejandroschuler.github.io/*
// @match *://*.zhihu.com/*
// @match *://*.arxiv.org/*
// @match *://*.ar5iv.org/*
// @match *://*.csdn.net/*
// @match *://chatgpt.com/*
// @match *://chat.deepseek.com/*
// @match *://amreis.github.io/*
// @match *://gemini.google.com/*
// @grant none
// @license MIT
// ==/UserScript==
function decodeHTMLEntities(text) {
const parser = new DOMParser();
const decodedString = parser.parseFromString(text, 'text/html').documentElement.textContent;
return decodedString;
}
function getTextContentWithReplacements(url,node) {
let text = '';
if (node && node.childNodes) {
node.childNodes.forEach(child => {
let breakout=false;
const nodeType = child.nodeType;
const nodeName = child.nodeName.toLowerCase();
// Default behavior for text nodes
if (child.nodeType === Node.TEXT_NODE) {
text += child.textContent;
}
if (nodeType === Node.ELEMENT_NODE){
// URL-specific processing rules
if (url.includes('wikipedia.org')) {
if (nodeName === 'span') {
if (child.querySelectorAll('math').length > 0) {
breakout=true;
text += '$' + child.getElementsByTagName('math')[0].getAttribute('alttext') + '$';
} else if (child.querySelectorAll('img').length > 0) {
breakout=true;
text += '$' + child.querySelectorAll('img')[0].getAttribute('alt') + '$';
}
}
} else if (url.includes('stackexchange.com') || url.includes('zhihu.com') || url.includes('amreis.github.io')) {
if (nodeName === 'span') {
breakout=true;
if (child.getElementsByTagName('script').length > 0) {
text += '$' + child.getElementsByTagName('script')[0].textContent + '$';
}
}
else if (nodeName === 'script') {
text += '$' + child.textContent + '$';
}
} else if (url.includes('chatgpt.com')||url.includes('alejandroschuler.github.io')||url.includes('chat.deepseek.com')) {
if (nodeName === 'span') {
if (child.getElementsByTagName('annotation').length > 0) {
breakout=true;
text += '$' + child.getElementsByTagName('annotation')[0].textContent + '$';
}
}
} else if (url.includes('arxiv.org')|| url.includes('ar5iv.org')){
if (nodeName === 'math'){
text += '$' + child.getAttribute('alttext') + '$'
}
} else if (url.includes('csdn.net')){
if (nodeName === 'span' && (child.getAttribute('class')==="katex--display" || child.getAttribute('class')==="katex--inline")){
const temp=child.getElementsByClassName("katex-mathml")[0].textContent
const terms = temp.split('\n')
.map(line => line.trim())
.filter(line => line.length > 0);
// Return the last non-empty term, or empty string if none found
if (terms.length>0){
text += '$' + terms[terms.length - 1] + '$'
}
}
}
else if (url.includes('gemini.google.com')){
if (nodeName === 'div' && child.getAttribute('class')==="math-block"){
text += '\n$$' + child.getAttribute('data-math')+ '$$\n';
breakout=true;
}
if (nodeName === 'span' && child.getAttribute('class')==="math-inline"){
text += '$' + child.getAttribute('data-math')+ '$';
breakout=true;
}
}
}
// For other elements, recurse into their children
if (!breakout && child.nodeType === Node.ELEMENT_NODE && !['script', 'math', 'img'].includes(child.nodeName.toLowerCase())) {
text += getTextContentWithReplacements(url,child);
}
});
}
text = text.replace(/\n+/g, '\n').trim();
text = text.replace(/\\bm\{([^}]+)\}/g, "\\mathbf{$1}");
text = text.replace(/\\bigg\{\|\}/g, "\\Bigl|");
text = text.replace(/\\big\{\|\}/g, "\\big|");
text = decodeHTMLEntities(text);
return text
}
(function() {
'use strict';
// Create the button element
const button = document.createElement('button');
button.textContent = 'Copy';
button.style.position = 'absolute';
button.style.zIndex = '2147483647'; // High z-index
button.style.display = 'none'; // Initially hidden
button.style.border = '1px solid black'; // For visibility
button.style.padding = '5px 10px'; // For better appearance
button.style.fontSize = '14px'; // For better appearance
button.style.cursor = 'pointer'; // Visual feedback
button.style.visibility = 'visible'; // Ensure visibility
button.style.opacity = '1'; // Ensure opacity
// Append the button to the body
document.body.appendChild(button);
// Function to handle button click
button.addEventListener('click', function() {
const selectedText = window.getSelection();
if (selectedText) {
myfunction(selectedText);
}
button.style.display = 'none'; // Hide the button after click
});
let previousSelectedText = '';
document.addEventListener('mouseup', function(event) {
const selectedText = window.getSelection().toString().trim();
// Only show the button if the selected text has changed
if (selectedText && selectedText !== previousSelectedText) {
const x = event.pageX + 5;
const y = event.pageY + 5;
button.style.left = `${x}px`;
button.style.top = `${y}px`;
button.style.display = 'block';
previousSelectedText = selectedText; // Update the previous selection
//console.log(button)
} else {
button.style.display = 'none';
previousSelectedText = ''; // Reset previous selection if no text is selected
}
});
// Custom function to process the selected text
function myfunction(selection) {
let url = window.location.href
let range = selection.getRangeAt(0);
//console.log('Text selected:', selection.toString()); // Log selected text
let c=range.cloneContents();
let text = getTextContentWithReplacements(url,c);
navigator.clipboard.writeText(text);
}
document.addEventListener('keydown', function(event) {
if (event.shiftKey && event.ctrlKey && event.altKey && event.key === 'C') {
//event.preventDefault(); // Prevent default browser behavior (like copying)
const selectedText = window.getSelection();
if (selectedText) {
myfunction(selectedText);
}
}
})
})();