☰

AtCoder Listing Tasks

Click [Tasks] tab to open a drop-down list linked to each task. / [問題]タブをクリックすると、各問題へのリンクをドロップダウンリストで表示します。

As of 28.05.2023. See ბოლო ვერსია.

  1. // ==UserScript==
  2. // @name         AtCoder Listing Tasks
  3. // @namespace    https://github.com/luuguas/AtCoderListingTasks
  4. // @version      1.0
  5. // @description  Click [Tasks] tab to open a drop-down list linked to each task. / [問題]タブをクリックすると、各問題へのリンクをドロップダウンリストで表示します。
  6. // @author       luuguas
  7. // @license      Apache
  8. // @match        https://atcoder.jp/contests/*
  9. // @exclude      https://atcoder.jp/contests/
  10. // @exclude      https://atcoder.jp/contests/archive
  11. // @grant        none
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.     'use strict';
  16.     const contest_url = 'https://atcoder.jp/contests/';
  17.     const unique_tag = 'user-script-listing-tasks';
  18.  
  19.     //[問題]タブに本UserScript用のidを追加(タブがなければfalseを返す)
  20.     function AttachId(){
  21.         let tabs = document.getElementById('contest-nav-tabs');
  22.         if(tabs === null){
  23.             return false;
  24.         }
  25.         let tasks_tab = tabs.querySelector('a[href$="tasks"]');
  26.         if(tasks_tab === null){
  27.             return false;
  28.         }
  29.         else{
  30.             tasks_tab.setAttribute('id', unique_tag);
  31.             return true;
  32.         }
  33.     }
  34.  
  35.     //[提出結果]タブと同様のドロップダウンリストに変える(中身は空)
  36.     function Togglize(){
  37.         let tasks_tab = document.getElementById(unique_tag);
  38.  
  39.         let attr = {
  40.             'class': 'dropdown-toggle',
  41.             'data-toggle': 'dropdown',
  42.             'href': '#',
  43.             'role:': 'button',
  44.             'aria-haspopup': 'true',
  45.             'aria-expanded': 'false',
  46.         };
  47.         for(let [key, value] of Object.entries(attr)){
  48.             tasks_tab.setAttribute(key, value);
  49.         }
  50.  
  51.         let caret = document.createElement('span');
  52.         caret.className = 'caret';
  53.         tasks_tab.appendChild(caret);
  54.  
  55.         let dropdown_menu = document.createElement('ul');
  56.         dropdown_menu.className = 'dropdown-menu';
  57.         tasks_tab.parentNode.appendChild(dropdown_menu);
  58.     }
  59.  
  60.     //リストを追加する
  61.     function AddList(){
  62.         let url = location.href;
  63.         let contest_name = url.split('/')[4];
  64.  
  65.         let tasks_tab_li = document.getElementById(unique_tag).parentNode;
  66.         let dropdown_menu = tasks_tab_li.querySelector('.dropdown-menu');
  67.  
  68.         //[問題一覧]の追加
  69.         let all_tasks = document.createElement('li');
  70.         let lang = document.querySelector('meta[http-equiv="Content-Language"]');
  71.         if(lang !== null && lang.getAttribute('content') === 'en'){
  72.             all_tasks.innerHTML = '<a href="' + contest_url + contest_name + '/tasks"><span class="glyphicon glyphicon-list" aria-hidden="true"></span> All Tasks</a>';
  73.         }
  74.         else{
  75.             all_tasks.innerHTML = '<a href="' + contest_url + contest_name + '/tasks"><span class="glyphicon glyphicon-list" aria-hidden="true"></span> 問題一覧</a>';
  76.         }
  77.         dropdown_menu.appendChild(all_tasks);
  78.  
  79.         //分割線の追加
  80.         let divider = document.createElement('li');
  81.         divider.className = 'divider';
  82.         dropdown_menu.appendChild(divider);
  83.  
  84.         //https://atcoder.jp/contests/***/tasks から問題のリストを抽出
  85.         let xhr = new XMLHttpRequest();
  86.         xhr.responseType = 'document';
  87.         xhr.onreadystatechange = function(){
  88.             let tasks_tab_li = document.getElementById(unique_tag).parentNode;
  89.             let dropdown_menu = tasks_tab_li.querySelector('.dropdown-menu');
  90.  
  91.             if(xhr.readyState === 4){
  92.                 if(xhr.status === 200){
  93.                     let result = xhr.responseXML;
  94.                     let problem_node = result.querySelector('#contest-nav-tabs + .col-sm-12');
  95.                     let problem_list = problem_node.querySelectorAll('table.table tbody tr');
  96.  
  97.                     //問題情報を抽出
  98.                     let list = [];
  99.                     for(let li of problem_list){
  100.                         let td = li.querySelectorAll('td');
  101.                         let problem_url = td[0].firstChild.getAttribute('href');
  102.                         let problem_diff = td[0].firstChild.textContent;
  103.                         let problem_name = td[1].firstChild.textContent;
  104.                         list.push({
  105.                             url: problem_url,
  106.                             diff: problem_diff,
  107.                             name: problem_name,
  108.                         });
  109.                     }
  110.  
  111.                     //リストを追加
  112.                     for(let data of list){
  113.                         let li = document.createElement('li');
  114.                         let a = document.createElement('a');
  115.                         a.setAttribute('href', data.url);
  116.                         a.textContent = data.diff + ' - ' + data.name;
  117.                         li.appendChild(a);
  118.                         dropdown_menu.appendChild(li);
  119.                     }
  120.                     console.log('[AtCoder Listing Tasks] Succeeded!');
  121.                 }
  122.                 else{
  123.                     let li = document.createElement('li');
  124.                     let a = document.createElement('a');
  125.                     a.setAttribute('href', 'javascript:void(0)');
  126.                     a.textContent = '(読み込み失敗)';
  127.                     li.appendChild(a);
  128.                     dropdown_menu.appendChild(li);
  129.                     console.log('[AtCoder Listing Tasks] Failed...');
  130.                 }
  131.             }
  132.         };
  133.         xhr.open('GET', 'https://atcoder.jp/contests/' + contest_name + '/tasks', true);
  134.         xhr.send(null);
  135.     }
  136.  
  137.     let tab_exist = AttachId();
  138.     if(!tab_exist){
  139.         //タブがない場合は終了
  140.         console.log('[AtCoder Listing Tasks] [Tasks] Tab isn\'t exist.');
  141.         return;
  142.     }
  143.     Togglize();
  144.     AddList();
  145.  
  146. })();