Click to copy equation in Wikipedia and Zhihu
// ==UserScript==
// @name CSND latex公式复制
// @namespace http://tampermonkey.net/
// @version 0.2
// @description Click to copy equation in Wikipedia and Zhihu
// @author curious
// @match https://blog.csdn.net/*/article/*
// @grant none
// @license MIT
// ==/UserScript==
const reverseMatchUntilNewline = function(inputString) {
let i = inputString.length - 1;
for (; i >= 0; i--) {
if (inputString[i] === '\n') {
// 遇到换行符时停止匹配
break;
}
}
return inputString.substring(i).trim();
};
function edit_latex() {
let eqs = document.querySelectorAll(".katex");
// console.log(eqs);
for (let i = 0; i < eqs.length; i++) {
let latex = '';
// 检查是否存在 <annotation> 标签
let annotation = eqs[i].querySelector('annotation');
if (annotation) {
console.log('latex:annotation');
latex = '$' + annotation.textContent.trim() + '$';
annotation.textContent = latex;
} else {
// 如果没有找到 <annotation>，可能需要更复杂的处理来从 HTML 转换回 LaTeX
let kmathml = eqs[i].querySelector('.katex-mathml')
latex = '$ ' + reverseMatchUntilNewline(kmathml.textContent.trim()) + ' $'
kmathml.textContent = latex;
}
eqs[i].textContent = latex;
}
}
document.addEventListener('scroll', edit_latex);
(window.onload = function () {
'use strict';
setTimeout(function () {
edit_latex();
}, 3000);
})