在洛谷问题页面的特定位置添加一个跳转到 VJudge 的链接
当前为
// ==UserScript==
// @name 洛谷到 VJudge 跳转脚本
// @namespace http://tampermonkey.net/
// @version 2.0
// @description 在洛谷问题页面的特定位置添加一个跳转到 VJudge 的链接
// @author Kimi
// @match https://www.luogu.com.cn/problem/*
// @grant none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
function getProblemCode() {
const path = window.location.pathname;
const match = path.match(/^\/problem\/([^/]+)/);
return match ? match[1] : null;
}
function getVJudgeURL(problemCode) {
let match;
if (match = problemCode.match(/^(P|B)(\d+)$/)) {
const prefix = '洛谷';
return `https://vjudge.net/problem/${encodeURIComponent(`${prefix}-${problemCode}`)}`;
}
if (match = problemCode.match(/^(UVA)(\d+)$/)) {
return `https://vjudge.net/problem/${encodeURIComponent(`UVA-${match[2]}`)}`;
}
if (match = problemCode.match(/^(CF)(\d+[A-Za-z]*)$/)) {
return `https://vjudge.net/problem/${encodeURIComponent(`CodeForces-${match[2]}`)}`;
}
if (match = problemCode.match(/^(SP)(\d+)$/)) {
const span = document.querySelector('span[title*=" - "]');
if (span) {
const title = span.getAttribute('title');
const contestName = title.split(' - ')[0];
return `https://vjudge.net/problem/${encodeURIComponent(`SPOJ-${contestName}`)}`;
}
return null;
}
if (match = problemCode.match(/^AT_(.+)$/)) {
return `https://vjudge.net/problem/${encodeURIComponent(`AtCoder-${match[1]}`)}`;
}
if (match = problemCode.match(/^AT(.+)$/)) {
return `https://vjudge.net/problem/${encodeURIComponent(`AtCoder-${match[1]}`)}`;
}
return null;
}
function injectVJudgeLink(vjudgeURL) {
const actionDiv = document.querySelector('div.action');
if (actionDiv) {
const link = document.createElement('a');
link.href = vjudgeURL;
link.target = '_blank';
link.style.marginLeft = '10px';
link.textContent = '跳转至 VJudge';
actionDiv.appendChild(link);
}
}
function main() {
const problemCode = getProblemCode();
if (!problemCode) {
console.warn('Luogu to VJudge Script: Unable to extract problem code.');
return;
}
const vjudgeURL = getVJudgeURL(problemCode);
if (!vjudgeURL) {
console.warn(`Luogu to VJudge Script: No VJudge mapping found for problem code "${problemCode}".`);
return;
}
injectVJudgeLink(vjudgeURL);
}
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', main);
} else {
main();
}
})();