在 VJudge 比赛题目页添加原题链接；并行在洛谷、UOJ、QOJ、LOJ 搜索并合并候选，优先展示洛谷/ UOJ 结果。
// ==UserScript==
// @name VJS | VJudge 原题（洛谷 + UOJ + QOJ + LOJ 合并搜索）
// @namespace https://vjudge.net/
// @version 1.8
// @author Oracynx (extended)
// @description 在 VJudge 比赛题目页添加原题链接；并行在洛谷、UOJ、QOJ、LOJ 搜索并合并候选，优先展示洛谷/ UOJ 结果。
// @match https://vjudge.net/contest/*
// @license MIT
// @grant GM_xmlhttpRequest
// @connect www.luogu.com.cn
// @connect qoj.ac
// @connect uoj.ac
// @connect loj.ac
// @run-at document-end
// ==/UserScript==
(function () {
'use strict';
const ANCHOR_CONTAINER_ID = 'vjudge-original-vjs-link';
const DEBOUNCE_MS = 140;
let titleObserver = null, bodyObserver = null, debounceTimer = null;
let lastDataJsonRaw = null, lastParsedData = null;
let currentRequestId = 0, pendingRequestId = null;
// ----- small utils -----
function parseDataJsonSafely() {
const ta = document.querySelector('textarea[name="dataJson"]');
if (!ta) return null;
const raw = ta.value || ta.textContent || ta.innerText || '';
if (!raw) return null;
if (raw === lastDataJsonRaw) return lastParsedData;
try {
const parsed = JSON.parse(raw);
lastDataJsonRaw = raw;
lastParsedData = parsed;
return parsed;
} catch (e) {
console.warn('vjudge-vjs: JSON parse failed', e);
lastDataJsonRaw = raw;
lastParsedData = null;
return null;
}
}
function simpleObjHash(obj) { try { return String(JSON.stringify(obj)); } catch { return String(obj); } }
function ensureStyles() {
if (document.getElementById('vjudge-vjs-styles')) return;
const style = document.createElement('style');
style.id = 'vjudge-vjs-styles';
style.textContent = `
#${ANCHOR_CONTAINER_ID} { margin-top:6px; font-size:14px; line-height:1.4; display:flex; align-items:center; gap:8px }
#${ANCHOR_CONTAINER_ID} .vjs-text { cursor:default }
#${ANCHOR_CONTAINER_ID} .vjs-meta { margin-left:4px; font-size:12px; color:#666 }
#${ANCHOR_CONTAINER_ID} .vjs-status { font-size:12px; color:#888 }
#${ANCHOR_CONTAINER_ID} .vjs-action { margin-left:8px; font-size:12px; cursor:pointer; color:#0b66ff; text-decoration:underline }
#${ANCHOR_CONTAINER_ID} .vjs-spinner { width:14px; height:14px; border-radius:50%; border:2px solid rgba(0,0,0,0.12); border-top-color:rgba(0,0,0,0.6); animation: vjs-spin 1s linear infinite }
@keyframes vjs-spin { from { transform:rotate(0deg) } to { transform:rotate(360deg) } }
#${ANCHOR_CONTAINER_ID} .vjs-click-hint { font-size:11px; color:#aaa }
`;
document.head.appendChild(style);
}
function createOrUpdateContainer(text, href, meta, state) {
ensureStyles();
const titleEl = document.getElementById('prob-title-contest');
if (!titleEl) return;
let existing = document.getElementById(ANCHOR_CONTAINER_ID);
const newHash = simpleObjHash({ href, meta, text, state });
if (existing && existing.dataset.hash === newHash) return;
if (existing) existing.remove();
const container = document.createElement('div');
container.id = ANCHOR_CONTAINER_ID;
container.dataset.hash = newHash;
if (state === 'loading') {
const spinner = document.createElement('div');
spinner.className = 'vjs-spinner';
container.appendChild(spinner);
}
if (href) {
const a = document.createElement('a');
a.style.textDecoration = 'none';
a.style.fontWeight = '500';
a.target = '_blank';
a.rel = 'noopener noreferrer';
a.href = href;
a.textContent = text || href;
a.className = 'vjs-text';
container.appendChild(a);
} else {
const span = document.createElement('span');
span.className = 'vjs-text';
span.textContent = text || '';
container.appendChild(span);
}
if (meta) {
const metaSpan = document.createElement('span');
metaSpan.className = 'vjs-meta';
metaSpan.textContent = `(${meta})`;
container.appendChild(metaSpan);
}
const statusSpan = document.createElement('span');
statusSpan.className = 'vjs-status';
if (state === 'loading') statusSpan.textContent = '正在搜索…';
else if (state === 'success') statusSpan.textContent = '已完成';
else if (state === 'error') statusSpan.textContent = '出错';
else statusSpan.textContent = '';
container.appendChild(statusSpan);
const retry = document.createElement('span');
retry.className = 'vjs-action';
retry.textContent = '重试';
retry.title = '点击重试搜索原题';
retry.addEventListener('click', (e) => { e.stopPropagation(); handleUpdate(true); });
container.appendChild(retry);
const hint = document.createElement('span');
hint.className = 'vjs-click-hint';
hint.textContent = '（点击重试）';
container.appendChild(hint);
try { titleEl.appendChild(container); } catch (e) { console.warn('vjudge-vjs: insert fail', e); }
}
// ----- GM 跨域 GET（优先） -----
function httpGetText(url, cb) {
try {
if (typeof GM !== 'undefined' && typeof GM.xmlHttpRequest === 'function') {
GM.xmlHttpRequest({
method: 'GET',
url: url,
headers: { 'User-Agent': "Oracynx's Problem Searcher" },
onload: function (res) { cb(null, res.responseText); },
onerror: function (err) { cb(err || new Error('request failed')); }
});
return;
}
} catch (e) { /* ignore */ }
try {
if (typeof GM_xmlhttpRequest === 'function') {
GM_xmlhttpRequest({
method: 'GET',
url: url,
headers: { 'User-Agent': "Oracynx's Problem Searcher" },
onload: function (res) { cb(null, res.responseText); },
onerror: function (err) { cb(err || new Error('request failed')); }
});
return;
}
} catch (e) { /* ignore */ }
// fallback（可能受 CORS）
fetch(url, { method: 'GET', credentials: 'omit' })
.then(r => r.text().then(t => cb(null, t)))
.catch(err => cb(err));
}
// ----- 在洛谷上搜索并解析 lentille-context -----
function searchOnLuogu(title, typeFilter, cb) {
const q = encodeURIComponent(title || '');
let type = encodeURIComponent(typeFilter || '');
if (type == 'CodeForces') type = 'CF';
if (type == 'AtCoder') type = 'AT';
const url = `https://www.luogu.com.cn/problem/list?keyword=${q}&type=${type}&page=1`;
httpGetText(url, (err, text) => {
if (err) return cb(err);
try {
const re = /<script\s+id=["']lentille-context["'][^>]*>([\s\S]*?)<\/script>/i;
const m = text.match(re);
if (!m || !m[1]) return cb(new Error('lentille-context not found'));
const jsonText = m[1].trim();
const parsed = JSON.parse(jsonText);
let candidateRoot = null;
if (parsed && parsed.props && parsed.props.pageProps) candidateRoot = parsed.props.pageProps;
else if (parsed && parsed.initialState) candidateRoot = parsed.initialState;
else if (parsed && parsed.data) candidateRoot = parsed.data;
else candidateRoot = parsed;
const findArrayWithTitles = (obj) => {
if (!obj || typeof obj !== 'object') return null;
if (Array.isArray(obj)) {
if (obj.length > 0 && obj[0] && (obj[0].title || obj[0].pid || obj[0].probNum || obj[0].id)) return obj;
}
for (const k of Object.keys(obj)) {
try {
const v = obj[k];
if (Array.isArray(v) && v.length > 0 && v[0] && (v[0].title || v[0].pid || v[0].probNum || v[0].id)) return v;
if (typeof v === 'object') {
const deeper = findArrayWithTitles(v);
if (deeper) return deeper;
}
} catch (e) { }
}
return null;
};
const arr = findArrayWithTitles(candidateRoot) || [];
// 对于洛谷结果，去除开头形如 [xxx] 的前缀再作为匹配标题
const normalized = (arr || []).map(it => {
const rawTitle = it.title || it.name || '';
// 去除一个或多个连续的方括号前缀，例如 [ICPC 2018 WF] Gem Island 或 [A][B] Name
const cleanedTitle = String(rawTitle).replace(/^\s*(?:\[[^\]]+\]\s*)+/, '');
return {
title: cleanedTitle,
originalTitle: rawTitle,
pid: it.pid || it.probNum || it.id || it.problemId || '',
url: it.url || (it.pid ? `https://www.luogu.com.cn/problem/${it.pid}` : ''),
type: it.type || 'LUOGU'
};
});
cb(null, normalized);
} catch (e) {
cb(e);
}
});
}
// ----- 在 QOJ 上搜索并解析问题列表页 -----
function searchOnQOJ(title, cb) {
const q = encodeURIComponent(title || '');
const url = `https://qoj.ac/problems?search=${q}`;
httpGetText(url, (err, text) => {
if (err) return cb(err);
try {
let parser;
try { parser = new DOMParser(); } catch (e) { parser = null; }
if (parser) {
const doc = parser.parseFromString(text, 'text/html');
const rows = doc.querySelectorAll('table.table tbody tr');
const results = [];
rows.forEach(tr => {
try {
const tds = tr.querySelectorAll('td');
if (!tds || tds.length < 2) return;
const idText = (tds[0].textContent || '').trim();
const idMatch = idText.match(/#?(\d+)/);
const pid = idMatch ? idMatch[1] : null;
const a = tds[1].querySelector('a');
const titleText = a ? (a.textContent || '').trim() : '';
const href = a ? a.getAttribute('href') : null;
const urlAbs = href ? (href.startsWith('http') ? href : `https://qoj.ac${href}`) : (pid ? `https://qoj.ac/problem/${encodeURIComponent(pid)}` : '');
if (titleText) {
results.push({ title: titleText, pid: pid, url: urlAbs, type: 'QOJ' });
}
} catch (e) { }
});
return cb(null, results);
} else {
const rowRe = /<tr[\s\S]*?>[\s\S]*?<td[^>]*>\s*#?(\d+)\s*<\/td>[\s\S]*?<td[^>]*>[\s\S]*?<a[^>]*href=["']([^"']+)["'][^>]*>([^<]+)<\/a>/gi;
const results = [];
let m;
while ((m = rowRe.exec(text)) !== null) {
const pid = m[1];
const href = m[2];
const titleText = m[3].trim();
const urlAbs = href.startsWith('http') ? href : `https://qoj.ac${href}`;
results.push({ title: titleText, pid: pid, url: urlAbs, type: 'QOJ' });
}
return cb(null, results);
}
} catch (e) {
cb(e);
}
});
}
// ----- 在 UOJ 上搜索并解析问题列表页 -----
function searchOnUOJ(title, cb) {
const q = encodeURIComponent(title || '');
const url = `https://uoj.ac/problems?search=${q}`;
httpGetText(url, (err, text) => {
if (err) return cb(err);
try {
let parser;
try { parser = new DOMParser(); } catch (e) { parser = null; }
if (parser) {
const doc = parser.parseFromString(text, 'text/html');
const rows = doc.querySelectorAll('table.table tbody tr');
const results = [];
rows.forEach(tr => {
try {
const tds = tr.querySelectorAll('td');
if (!tds || tds.length < 2) return;
const idText = (tds[0].textContent || '').trim();
const idMatch = idText.match(/#?(\d+)/);
const pid = idMatch ? idMatch[1] : null;
const a = tds[1].querySelector('a');
const titleText = a ? (a.textContent || '').trim() : '';
const href = a ? a.getAttribute('href') : null;
const urlAbs = href ? (href.startsWith('http') ? href : `https://uoj.ac${href}`) : (pid ? `https://uoj.ac/problem/${encodeURIComponent(pid)}` : '');
if (titleText) {
results.push({ title: titleText, pid: pid, url: urlAbs, type: 'UOJ' });
}
} catch (e) { }
});
return cb(null, results);
} else {
const rowRe = /<tr[\s\S]*?>[\s\S]*?<td[^>]*>\s*#?(\d+)\s*<\/td>[\s\S]*?<td[^>]*>[\s\S]*?<a[^>]*href=["']([^"']+)["'][^>]*>([^<]+)<\/a>/gi;
const results = [];
let m;
while ((m = rowRe.exec(text)) !== null) {
const pid = m[1];
const href = m[2];
const titleText = m[3].trim();
const urlAbs = href.startsWith('http') ? href : `https://uoj.ac${href}`;
results.push({ title: titleText, pid: pid, url: urlAbs, type: 'UOJ' });
}
return cb(null, results);
}
} catch (e) {
cb(e);
}
});
}
// 新的 searchOnLOJ：使用 LOJ 的官方查询 API（POST JSON）
function searchOnLOJ(title, cb) {
const url = 'https://api.loj.ac/api/problem/queryProblemSet';
const bodyObj = { locale: 'zh_CN', skipCount: 0, takeCount: 50, keyword: title || '' };
const bodyText = JSON.stringify(bodyObj);
// 首选 GM 跨域请求（Tampermonkey/Violentmonkey 支持）
const doCallbackWithError = (err) => {
try { cb(err, []); } catch (e) { console.error('searchOnLOJ cb error', e); }
};
try {
if (typeof GM !== 'undefined' && typeof GM.xmlHttpRequest === 'function') {
GM.xmlHttpRequest({
method: 'POST',
url: url,
data: bodyText,
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json'
},
onload: function (res) {
try {
const text = res.responseText || '';
const json = JSON.parse(text);
if (!json || !Array.isArray(json.result)) return cb(null, []);
const results = (json.result || []).map(item => {
const meta = item.meta || {};
// 优先使用 displayId 做显示 pid，如需改为 meta.id 可以调整
const pid = (meta.displayId !== undefined && meta.displayId !== null) ? String(meta.displayId) : (meta.id ? String(meta.id) : null);
const idForUrl = meta.id ? String(meta.id) : pid;
const urlAbs = idForUrl ? `https://loj.ac/problem/${encodeURIComponent(idForUrl)}` : null;
return {
title: item.title || '',
pid: pid,
url: urlAbs,
type: 'LOJ',
meta: meta
};
}).filter(r => r.title);
return cb(null, results);
} catch (e) {
console.warn('searchOnLOJ: parse error, falling back', e);
return doFallbackHtmlParse();
}
},
onerror: function (err) {
console.warn('searchOnLOJ: GM xmlHttpRequest error', err);
return doFallbackHtmlParse();
},
ontimeout: function () {
console.warn('searchOnLOJ: GM xmlHttpRequest timeout');
return doFallbackHtmlParse();
},
timeout: 15000
});
return;
}
} catch (e) {
console.warn('searchOnLOJ: GM.xmlHttpRequest not available', e);
}
// fallback: fetch POST (可能受 CORS/凭据限制)
function tryFetchFallback() {
fetch(url, {
method: 'POST',
headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' },
body: bodyText,
mode: 'cors', // 注意：可能受 CORS/凭据限制
credentials: 'omit'
}).then(r => r.text()).then(t => {
try {
const json = JSON.parse(t);
if (!json || !Array.isArray(json.result)) return cb(null, []);
const results = (json.result || []).map(item => {
const meta = item.meta || {};
const pid = (meta.displayId !== undefined && meta.displayId !== null) ? String(meta.displayId) : (meta.id ? String(meta.id) : null);
const idForUrl = meta.id ? String(meta.id) : pid;
const urlAbs = idForUrl ? `https://loj.ac/problem/${encodeURIComponent(idForUrl)}` : null;
return {
title: item.title || '',
pid: pid,
url: urlAbs,
type: 'LOJ',
meta: meta
};
}).filter(r => r.title);
return cb(null, results);
} catch (e) {
console.warn('searchOnLOJ: fetch parse error', e);
return doFallbackHtmlParse();
}
}).catch(err => {
console.warn('searchOnLOJ: fetch error', err);
return doFallbackHtmlParse();
});
}
// 兜底：如果 API 不可用（被 CORS / token 问题阻止），回退到尝试抓取 loj.ac HTML 或旧的 loj 解析
function doFallbackHtmlParse() {
// 尝试从公开 loj.ac/problems?search=... 页面抓表格或 /problem/ 链接
const fallbackUrl = `https://loj.ac/problems?search=${encodeURIComponent(title || '')}`;
httpGetText(fallbackUrl, (err, text) => {
if (err || !text) return doCallbackWithError(err || new Error('LOJ API and fallback both failed'));
try {
let parser;
try { parser = new DOMParser(); } catch (e) { parser = null; }
if (parser) {
const doc = parser.parseFromString(text, 'text/html');
const rows = doc.querySelectorAll('table.table tbody tr');
const results = [];
rows.forEach(tr => {
try {
const tds = tr.querySelectorAll('td');
if (!tds || tds.length < 2) return;
const idText = (tds[0].textContent || '').trim();
const idMatch = idText.match(/#?(\d+)/);
const pid = idMatch ? idMatch[1] : null;
const a = tds[1].querySelector('a');
const titleText = a ? (a.textContent || '').trim() : '';
const href = a ? a.getAttribute('href') : null;
const urlAbs = href ? (href.startsWith('http') ? href : `https://loj.ac${href}`) : (pid ? `https://loj.ac/problem/${encodeURIComponent(pid)}` : '');
if (titleText) results.push({ title: titleText, pid: pid, url: urlAbs, type: 'LOJ' });
} catch (e) { }
});
if (results.length > 0) return cb(null, results);
}
// 正则兜底匹配 /problem/<id> 链接
const rowRe = /<a[^>]*href=["']([^"']*\/problem\/(\d+)[^"']*)["'][^>]*>([^<]+)<\/a>/gi;
const results2 = [];
let m;
while ((m = rowRe.exec(text)) !== null) {
const href = m[1];
const pid = m[2];
const titleText = m[3].trim();
const urlAbs = href.startsWith('http') ? href : `https://loj.ac${href}`;
results2.push({ title: titleText, pid: pid, url: urlAbs, type: 'LOJ' });
}
if (results2.length > 0) return cb(null, results2);
return doCallbackWithError(new Error('LOJ fallback parse found nothing'));
} catch (e) {
return doCallbackWithError(e);
}
});
}
// 如果 GM 请求不可用，先用 fetch 再兜底
tryFetchFallback();
}
// ----- 统一入口：并行查询洛谷 + UOJ + QOJ + LOJ，合并结果 (优先顺序：LUOGU, UOJ, QOJ, LOJ) -----
function performUnifiedSearch(payload, cb) {
if (!payload || !payload.title) return cb(new Error('invalid payload'));
const sources = [
{ fn: (cb2) => searchOnLuogu(payload.title, payload.type || '', cb2), name: 'LUOGU' },
{ fn: (cb2) => searchOnUOJ(payload.title, cb2), name: 'UOJ' },
{ fn: (cb2) => searchOnQOJ(payload.title, cb2), name: 'QOJ' },
{ fn: (cb2) => searchOnLOJ(payload.title, cb2), name: 'LOJ' }
];
const resultsBySource = {};
let remaining = sources.length;
let anyErr = null;
sources.forEach(s => {
try {
s.fn((err, arr) => {
if (err) anyErr = anyErr || err;
resultsBySource[s.name] = (arr || []);
remaining--;
if (remaining === 0) finalize();
});
} catch (e) {
anyErr = anyErr || e;
resultsBySource[s.name] = [];
remaining--;
if (remaining === 0) finalize();
}
});
function finalize() {
// 按优先级合并并去重（优先顺序：LUOGU, UOJ, QOJ, LOJ）
const order = ['LUOGU', 'UOJ', 'QOJ', 'LOJ'];
const combined = [];
// 使用标题规范化、url、pid 三条线索去重，标题规范化为首要判断
const seenTitles = new Set();
const seenUrls = new Set();
const seenPids = new Set();
order.forEach(src => {
(resultsBySource[src] || []).forEach(it => {
if (!it) return;
const titleNorm = it.title ? String(it.title).trim().toLowerCase() : '';
const url = it.url ? String(it.url).trim() : '';
const pid = (it.pid !== undefined && it.pid !== null) ? String(it.pid).trim() : '';
// 如果标题已有优先来源，则跳过
if (titleNorm && seenTitles.has(titleNorm)) return;
// 否则如果 url 或 pid 已存在也跳过
if (url && seenUrls.has(url)) return;
if (pid && seenPids.has(pid)) return;
// 否则保留该条目，并标记这些键
combined.push(it);
if (titleNorm) seenTitles.add(titleNorm);
if (url) seenUrls.add(url);
if (pid) seenPids.add(pid);
});
});
// 如果合并为空但有错误，返回错误（便于调试）
if (combined.length === 0 && anyErr) return cb(anyErr);
const shaped = { data: { problems: { result: (combined || []).map(it => ({ title: it.title, pid: it.pid, url: it.url, type: it.type })) } } };
cb(null, shaped);
}
}
// ----- utility: get problem letter from hash -----
function getProblemLetterFromHash() {
const m = location.hash.match(/#problem\/([^/?&]+)/);
return m ? m[1] : null;
}
// ----- core handler -----
function handleUpdate(force = false) {
clearTimeout(debounceTimer);
debounceTimer = setTimeout(() => {
try {
const letter = getProblemLetterFromHash();
if (!letter) { const ex = document.getElementById(ANCHOR_CONTAINER_ID); if (ex) ex.remove(); return; }
const data = parseDataJsonSafely();
if (!data || !Array.isArray(data.problems)) { const ex2 = document.getElementById(ANCHOR_CONTAINER_ID); if (ex2) ex2.remove(); return; }
const target = data.problems.find(p => {
if (!p) return false;
if (p.num && String(p.num).toUpperCase() === String(letter).toUpperCase()) return true;
if (p.num && String(p.num).toUpperCase().includes(String(letter).toUpperCase())) return true;
return false;
}) || null;
if (!target) { const ex = document.getElementById(ANCHOR_CONTAINER_ID); if (ex) ex.remove(); return; }
const title = target.title || (target.name ? target.name : '');
const type = (target && target.oj) ? String(target.oj) : (target && target.source ? String(target.source) : '');
if (!title) { createOrUpdateContainer('原题：无法识别题目标题', null, null, 'error'); return; }
createOrUpdateContainer('原题：正在搜索…（洛谷 / UOJ / QOJ / LOJ）', null, '', 'loading');
const payload = { type: type || '', title: title };
const thisRequestId = ++currentRequestId;
pendingRequestId = thisRequestId;
performUnifiedSearch(payload, (err, resJson) => {
if (pendingRequestId !== thisRequestId) return;
pendingRequestId = null;
if (err) {
console.warn('vjudge-vjs: unified search error', err);
createOrUpdateContainer('原题：搜索失败或解析异常', null, null, 'error');
return;
}
try {
const resultArr = (resJson && resJson.data && resJson.data.problems && resJson.data.problems.result) ? resJson.data.problems.result : null;
if (!Array.isArray(resultArr) || resultArr.length === 0) {
createOrUpdateContainer('原题：未找到匹配结果（洛谷/UOJ/QOJ/LOJ）', null, null, 'error');
return;
}
// 尽量找标题完全匹配（先精确，再忽略大小写，再取第一个）
let match = resultArr.find(x => x && x.title && String(x.title) === String(title));
if (!match) match = resultArr.find(x => x && x.title && String(x.title).toLowerCase() === String(title).toLowerCase());
if (!match) match = resultArr[0];
const pid = match && (match.pid || match.probNum || match.id || match.problemId) ? (match.pid || match.probNum || match.id || match.problemId) : null;
const mtype = (match && match.type) ? String(match.type).toUpperCase() : '';
if (mtype.includes('UOJ') && pid) {
const uojLink = match.url || `https://uoj.ac/problem/${encodeURIComponent(pid)}`;
createOrUpdateContainer(`原题: UOJ ${pid}`, uojLink, `UOJ - ${pid}`, 'success');
} else if (mtype.includes('QOJ') && pid) {
const qojLink = match.url || `https://qoj.ac/problem/${encodeURIComponent(pid)}`;
createOrUpdateContainer(`原题: QOJ ${pid}`, qojLink, `QOJ - ${pid}`, 'success');
} else if (mtype.includes('LOJ') && pid) {
const lojLink = match.url || `https://loj.ac/problem/${encodeURIComponent(pid)}`;
createOrUpdateContainer(`原题: LOJ ${pid}`, lojLink, `LOJ - ${pid}`, 'success');
} else if (mtype.includes('LUOGU') && pid) {
const luoguLink = match.url || `https://www.luogu.com.cn/problem/${encodeURIComponent(pid)}`;
createOrUpdateContainer(`原题: ${pid}`, luoguLink, `LUOGU - ${pid}`, 'success');
} else if (match && match.url) {
createOrUpdateContainer(`原题: ${match.title || '候选'}`, match.url, `${match.type || payload.type || ''}`, 'success');
} else if (pid) {
// 无法确定来源但有 pid，尝试构造常见链接（先 UOJ/QOJ/LOJ/LOUGU）
const tryUrls = [
`https://uoj.ac/problem/${encodeURIComponent(pid)}`,
`https://qoj.ac/problem/${encodeURIComponent(pid)}`,
`https://loj.ac/problem/${encodeURIComponent(pid)}`,
`https://www.luogu.com.cn/problem/${encodeURIComponent(pid)}`
];
createOrUpdateContainer(`原题: ${pid}`, tryUrls[0], `尝试：${tryUrls.join(' / ')}`, 'success');
} else {
createOrUpdateContainer('原题：找到候选但无 pid/url 字段', null, null, 'error');
}
} catch (e) {
console.error('vjudge-vjs: parse response error', e);
createOrUpdateContainer('原题：结果处理异常', null, null, 'error');
}
});
} catch (err) {
console.error('vjudge-vjs: handleUpdate error', err);
}
}, DEBOUNCE_MS);
}
// ----- observers -----
function startTitleObserver() {
stopTitleObserver();
const titleEl = document.getElementById('prob-title-contest');
if (!titleEl) return;
titleObserver = new MutationObserver((mutations) => {
for (const m of mutations) {
if (m.addedNodes) {
for (const n of m.addedNodes) {
if (n && n.id === ANCHOR_CONTAINER_ID) return;
if (n && n.querySelector && n.querySelector(`#${ANCHOR_CONTAINER_ID}`)) return;
}
}
}
handleUpdate();
});
titleObserver.observe(titleEl, { childList: true, subtree: true, characterData: true });
}
function stopTitleObserver() { if (titleObserver) { try { titleObserver.disconnect(); } catch (e) { } titleObserver = null; } }
function startBodyObserver() {
if (bodyObserver) return;
bodyObserver = new MutationObserver((mutations) => {
for (const m of mutations) {
if (m.addedNodes) {
for (const n of m.addedNodes) {
if (n && n.querySelector && n.querySelector('#prob-title-contest')) {
setTimeout(() => { startTitleObserver(); handleUpdate(); }, 30);
return;
}
if (n && n.id === 'prob-title-contest') {
setTimeout(() => { startTitleObserver(); handleUpdate(); }, 30);
return;
}
}
}
}
});
bodyObserver.observe(document.body, { childList: true, subtree: true });
}
function stopBodyObserver() { if (bodyObserver) { try { bodyObserver.disconnect(); } catch (e) { } bodyObserver = null; } }
function tryInit(retries = 12) {
const titleEl = document.getElementById('prob-title-contest');
if (titleEl) {
startTitleObserver();
startBodyObserver();
handleUpdate();
} else if (retries > 0) {
setTimeout(() => tryInit(retries - 1), 250);
} else {
startBodyObserver();
}
}
window.addEventListener('hashchange', () => { setTimeout(handleUpdate, 80); });
tryInit();
// cleanup
window.__vjudge_vjs_cleanup = function () {
stopTitleObserver();
stopBodyObserver();
const ex = document.getElementById(ANCHOR_CONTAINER_ID);
if (ex) ex.remove();
console.info('vjudge-vjs: cleaned up');
};
})();