Greasy Fork is available in English.
这个脚本可以复制各大 OJ 的题目标题，方便整理题号信息并收藏到本地
// ==UserScript==
// @name Online Judge 标题复制器
// @name:zh-CN Online Judge 标题复制器
// @name:en Online Judge Problem Title Copier
// @namespace https://tampermonkey.net
// @version 0.3.2
// @author Jerry Karlbaey
// @description 这个脚本可以复制各大 OJ 的题目标题，方便整理题号信息并收藏到本地
// @description:zh-CN 这个脚本可以复制各大 OJ 的题目标题，方便整理题号信息并收藏到本地
// @description:en This script can copy the problem titles from major OJs, making it easy to organize problem numbers and save them locally.
// @homepage https://github.com/Karlbaey/Karlgo
// @supportURL https://github.com/Karlbaey/Karlgo/issues
// @grant GM_setClipboard
// @license AGPL-3.0-only
// @match *://onlinejudge.org/index.php*option=com_onlinejudge*page=show_problem*
// @match *://codeforces.com/problemset/problem/*
// @match *://codeforces.com/contest/*/problem/*
// @match *://leetcode.com/problems/*
// @match *://leetcode.cn/problems/*
// @match *://www.luogu.com.cn/problem/*
// @match *://www.lintcode.com/problem/*
// @match *://acm.hdu.edu.cn/*
// ==/UserScript==
(function () {
"use strict";
// --- Site Configurations ---
const siteConfigs = {
"onlinejudge.org": {
prefix: "UVa",
selector: "#col3_content_wrapper h3",
},
"codeforces.com": {
prefix: "CF",
selector: ".problem-statement .header .title",
process: (text) => {
// 1. Extract the match ID and problem code from the URL
const Path = window.location.pathname;
const match = Path.match(/\/problem\/(\d+)\/([A-Z]\d?)/);
if (!match) {
return text.replace(/\./g, "");
}
// match[1] is the competition/problem set ID, such as "2175"
const contestId = match[1];
// match[2] is the problem code, such as "B"
const problemCode = match[2];
const problemName = text.substring(text.indexOf(".") + 1).trim();
return `${contestId}${problemCode}_${problemName}`;
},
},
"leetcode.com": {
prefix: "LC",
selector: ".text-title-large",
// Remove dot '.'
process: (text) => text.replace(/\./g, ""),
},
"leetcode.cn": {
prefix: "LC", // Sync with English site
selector: ".text-title-large",
// Remove dot '.'
process: (text) => text.replace(/\./g, ""),
},
"www.luogu.com.cn": {
prefix: "LG",
selector: ".lfe-h1",
},
"www.lintcode.com": {
prefix: "Lint",
selector: ".title-TkVpy",
},
"acm.hdu.edu.cn": {
prefix: "HDU",
// FIX: Use a more specific selector to target the problem title's h1,
// which has a unique inline style. This avoids selecting the site's main banner h1.
selector: "h1",
process: (text) => {
const params = new URLSearchParams(window.location.search);
const problemId = params.get("pid");
return problemId ? `${problemId}_${text}` : text;
},
},
};
// --- Core Logic ---
/**
* Create and attach a copy button next to the specified element
* @param {HTMLElement} titleElement - The DOM element where the title is located
* @param {object} config - Current site configuration
*/
function create(titleElement, config) {
if (
titleElement.nextElementSibling &&
titleElement.nextElementSibling.classList.contains(
"oj-title-copier-wrapper"
)
) {
return;
}
const wrapper = document.createElement("div");
wrapper.className = "oj-title-copier-wrapper";
Object.assign(wrapper.style, {
display: "inline-block",
verticalAlign: "middle",
});
const copybutton = document.createElement("button");
copybutton.textContent = "复制标题";
copybutton.className = "oj-title-copier-btn";
Object.assign(copybutton.style, {
marginLeft: "15px",
padding: "4px 10px",
cursor: "pointer",
border: "1px solid #ccc",
borderRadius: "4px",
backgroundColor: "#f0f0f0",
color: "#333",
fontSize: "14px",
fontWeight: "normal",
});
copybutton.addEventListener("click", (e) => {
e.preventDefault();
e.stopPropagation();
const Raw = titleElement.textContent.trim();
const Clean = config.process ? config.process(Raw) : Raw;
const Formatted = `${config.prefix}_${Clean.replace(/\s+/g, "_")}`;
GM_setClipboard(Formatted);
const originalText = copybutton.textContent;
copybutton.textContent = "已复制!";
copybutton.style.backgroundColor = "#d4edda";
copybutton.style.borderColor = "#c3e6cb";
setTimeout(() => {
copybutton.textContent = originalText;
copybutton.style.backgroundColor = "#f0f0f0";
copybutton.style.borderColor = "#ccc";
}, 2000);
});
wrapper.appendChild(copybutton);
titleElement.insertAdjacentElement("afterend", wrapper);
}
// --- Script Entry ---
// Get the configuration of the current site
const Current = siteConfigs[window.location.hostname];
if (Current) {
// Since modern website content may load dynamically, we use setInterval to poll for the title element
const Find = setInterval(() => {
const title = document.querySelector(Current.selector);
if (title) {
// After finding the element, clear the timer and perform the operation
clearInterval(Find);
create(title, Current);
}
}, 500); // Check every 500 ms
// Set a timeout to prevent the element from being permanently unfindable due to changes in the page structure.
setTimeout(() => {
clearInterval(Find);
}, 15000); // Stop trying after 15 seconds
}
})();