Tweak New Twitter

Remove algorithmic content from Twitter, hide news & trends, control which shared tweets appear on your timeline, and improve the UI

Ekde 2021/08/13. Vidu La ĝisdata versio.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Tweak New Twitter
// @description Remove algorithmic content from Twitter, hide news & trends, control which shared tweets appear on your timeline, and improve the UI
// @namespace   https://github.com/insin/tweak-new-twitter/
// @match       https://twitter.com/*
// @match       https://mobile.twitter.com/*
// @version     41
// ==/UserScript==

const enableDebugLogging = false

const mobile = navigator.userAgent.includes('Android')
const desktop = !mobile

const $html = document.querySelector('html')
const $body = document.body
const lang = $html.lang
const dir = $html.dir
const ltr = dir == 'ltr'

//#region Default config
/**
 * @type {import("./types").Config}
 */
const config = {
  // Shared
  addAddMutedWordMenuItem: true,
  alwaysUseLatestTweets: true,
  dontUseChirpFont: false,
  fastBlock: true,
  followButtonStyle: 'monochrome',
  hideAnalyticsNav: true,
  hideBookmarksNav: true,
  hideListsNav: true,
  hideMomentsNav: true,
  hideMoreTweets: true,
  hideNewslettersNav: true,
  hideShareTweetButton: false,
  hideTopicsNav: true,
  hideTweetAnalyticsLinks: false,
  hideTwitterAdsNav: true,
  hideUnavailableQuoteTweets: true,
  hideWhoToFollowEtc: true,
  likedTweets: 'hide',
  quoteTweets: 'ignore',
  repliedToTweets: 'hide',
  retweets: 'separate',
  suggestedTopicTweets: 'hide',
  tweakQuoteTweetsPage: true,
  uninvertFollowButtons: false,
  // Experiments
  disableHomeTimeline: false,
  disabledHomeTimelineRedirect: 'notifications',
  hideMetrics: false,
  hideFollowingMetrics: true,
  hideLikeMetrics: true,
  hideQuoteTweetMetrics: true,
  hideReplyMetrics: true,
  hideRetweetMetrics: true,
  hideTotalTweetsMetrics: true,
  reducedInteractionMode: false,
  verifiedAccounts: 'ignore',
  // Desktop only
  hideAccountSwitcher: true,
  hideExploreNav: true,
  hideMessagesDrawer: true,
  hideSidebarContent: true,
  navBaseFontSize: true,
  // Mobile only
  hideAppNags: true,
  hideExplorePageContents: true,
  hideMessagesBottomNavItem: false,
}
//#endregion

//#region Locales
/**
 * @type {{[key: string]: import("./types").Locale}}
 */
const locales = {
  'ar-x-fm': {
    ADD_MUTED_WORD: 'اضافة كلمة مكتومة',
    HOME: 'الرئيسيّة',
    LATEST_TWEETS: 'أحدث التغريدات',
    QUOTE_TWEET: 'اقتباس التغريدة',
    QUOTE_TWEETS: 'تغريدات اقتباس',
    RETWEETS: 'إعادات التغريد',
    SHARED_TWEETS: 'التغريدات المشتركة',
    TWITTER: 'تويتر',
  },
  ar: {
    ADD_MUTED_WORD: 'اضافة كلمة مكتومة',
    HOME: 'الرئيسيّة',
    LATEST_TWEETS: 'أحدث التغريدات',
    QUOTE_TWEET: 'اقتباس التغريدة',
    QUOTE_TWEETS: 'تغريدات اقتباس',
    RETWEETS: 'إعادات التغريد',
    SHARED_TWEETS: 'التغريدات المشتركة',
    TWITTER: 'تويتر',
  },
  bg: {
    ADD_MUTED_WORD: 'Добавяне на заглушена дума',
    HOME: 'Начало',
    LATEST_TWEETS: 'Най-новите туитове',
    QUOTE_TWEET: 'Цитиране на туита',
    QUOTE_TWEETS: 'Туитове с цитат',
    RETWEETS: 'Ретуитове',
    SHARED_TWEETS: 'Споделени туитове',
  },
  bn: {
    ADD_MUTED_WORD: 'নীরব করা শব্দ যোগ করুন',
    HOME: 'হোম',
    LATEST_TWEETS: 'সাম্প্রতিক টুইটগুলি',
    QUOTE_TWEET: 'টুইট উদ্ধৃত করুন',
    QUOTE_TWEETS: 'টুইট উদ্ধৃতিগুলো',
    RETWEETS: 'পুনঃটুইটগুলো',
    SHARED_TWEETS: '',
    TWITTER: 'টুইটার',
  },
  ca: {
    ADD_MUTED_WORD: 'Afegeix una paraula silenciada',
    HOME: 'Inici',
    LATEST_TWEETS: 'Tuits més recents',
    QUOTE_TWEET: 'Cita el tuit',
    QUOTE_TWEETS: 'Tuits amb cita',
    RETWEETS: 'Retuits',
    SHARED_TWEETS: 'Tuits compartits',
  },
  cs: {
    ADD_MUTED_WORD: 'Přidat slovo na seznam skrytých slov',
    HOME: 'Hlavní stránka',
    LATEST_TWEETS: 'Nejnovější tweety',
    QUOTE_TWEET: 'Citovat Tweet',
    QUOTE_TWEETS: 'Tweety s citací',
    RETWEETS: 'Retweety',
    SHARED_TWEETS: 'Sdílené tweety',
  },
  da: {
    ADD_MUTED_WORD: 'Tilføj skjult ord',
    HOME: 'Forside',
    LATEST_TWEETS: 'Seneste Tweets',
    QUOTE_TWEET: 'Citér Tweet',
    QUOTE_TWEETS: 'Citat-Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Delte tweets',
  },
  de: {
    ADD_MUTED_WORD: 'Stummgeschaltetes Wort hinzufügen',
    HOME: 'Startseite',
    LATEST_TWEETS: 'Neueste Tweets',
    QUOTE_TWEET: 'Tweet zitieren',
    QUOTE_TWEETS: 'Zitierte Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Geteilte Tweets',
  },
  el: {
    ADD_MUTED_WORD: 'Προσθήκη λέξης σε σίγαση',
    HOME: 'Αρχική σελίδα',
    LATEST_TWEETS: 'Τα πιο πρόσφατα Tweet',
    QUOTE_TWEET: 'Παράθεση Tweet',
    QUOTE_TWEETS: 'Tweet με παράθεση',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Κοινόχρηστα Tweets',
  },
  en: {
    ADD_MUTED_WORD: 'Add muted word',
    HOME: 'Home',
    LATEST_TWEETS: 'Latest Tweets',
    QUOTE_TWEET: 'Quote Tweet',
    QUOTE_TWEETS: 'Quote Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Shared Tweets',
    TWITTER: 'Twitter',
  },
  es: {
    ADD_MUTED_WORD: 'Añadir palabra silenciada',
    HOME: 'Inicio',
    LATEST_TWEETS: 'Tweets más recientes',
    QUOTE_TWEET: 'Citar Tweet',
    QUOTE_TWEETS: 'Tweets citados',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Tweets compartidos',
  },
  eu: {
    ADD_MUTED_WORD: 'Gehitu isilarazitako hitza',
    HOME: 'Hasiera',
    LATEST_TWEETS: 'Azken txioak',
    QUOTE_TWEET: 'Txioa apaitu',
    QUOTE_TWEETS: 'Aipatu txioak',
    RETWEETS: 'Bertxioak',
    SHARED_TWEETS: 'Partekatutako',
  },
  fa: {
    ADD_MUTED_WORD: 'افزودن واژه خموش‌سازی شده',
    HOME: 'خانه',
    LATEST_TWEETS: 'جدیدترین توییت‌ها',
    QUOTE_TWEET: 'نقل‌توییت',
    QUOTE_TWEETS: 'نقل‌توییت',
    RETWEETS: 'بازتوییت‌ها',
    SHARED_TWEETS: 'توییتهای مشترک',
    TWITTER: 'توییتر',
  },
  fi: {
    ADD_MUTED_WORD: 'Lisää hiljennetty sana',
    HOME: 'Etusivu',
    LATEST_TWEETS: 'Uusimmat twiitit',
    QUOTE_TWEET: 'Twiitin lainaus',
    QUOTE_TWEETS: 'Twiitin lainaukset',
    RETWEETS: 'Uudelleentwiittaukset',
    SHARED_TWEETS: 'Jaetut twiitit',
  },
  fil: {
    ADD_MUTED_WORD: 'Idagdag ang naka-mute na salita',
    HOME: 'Home',
    LATEST_TWEETS: 'Mga Pinakabagong Tweet',
    QUOTE_TWEET: 'Quote na Tweet',
    QUOTE_TWEETS: 'Mga Quote na Tweet',
    RETWEETS: 'Mga Retweet',
    SHARED_TWEETS: 'Mga Ibinahaging Tweet',
  },
  fr: {
    ADD_MUTED_WORD: 'Ajouter un mot masqué',
    HOME: 'Accueil',
    LATEST_TWEETS: 'Tout derniers Tweets',
    QUOTE_TWEET: 'Citer le Tweet',
    QUOTE_TWEETS: 'Tweets cités',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Tweets partagés',
  },
  ga: {
    ADD_MUTED_WORD: 'Cuir focal balbhaithe leis',
    HOME: 'Baile',
    LATEST_TWEETS: 'Tweetanna is déanaí',
    QUOTE_TWEET: 'Cuir Ráiteas Leis',
    QUOTE_TWEETS: 'Luaigh Tvuíteanna',
    RETWEETS: 'Atweetanna',
    SHARED_TWEETS: 'Tweetanna Roinnte',
  },
  gl: {
    ADD_MUTED_WORD: 'Engadir palabra silenciada',
    HOME: 'Inicio',
    LATEST_TWEETS: 'Últimos chíos',
    QUOTE_TWEET: 'Citar chío',
    QUOTE_TWEETS: 'Chíos citados',
    RETWEETS: 'Rechouchíos',
    SHARED_TWEETS: 'Chíos compartidos',
  },
  gu: {
    ADD_MUTED_WORD: 'જોડાણ અટકાવેલો શબ્દ ઉમેરો',
    HOME: 'હોમ',
    LATEST_TWEETS: 'તાજેતરની ટ્વીટ્સ',
    QUOTE_TWEET: 'અવતરણની સાથે ટ્વીટ કરો',
    QUOTE_TWEETS: 'અવતરણની સાથે ટ્વીટ્સ',
    RETWEETS: 'પુનટ્વીટ્સ',
    SHARED_TWEETS: 'શેર કરેલી ટ્વીટ્સ',
  },
  he: {
    ADD_MUTED_WORD: 'הוסף מילה מושתקת',
    HOME: 'דף הבית',
    LATEST_TWEETS: 'הציוצים האחרונים',
    QUOTE_TWEET: 'ציטוט ציוץ',
    QUOTE_TWEETS: 'ציוצי ציטוט',
    RETWEETS: 'ציוצים מחדש',
    SHARED_TWEETS: 'ציוצים משותפים',
    TWITTER: 'טוויטר',
  },
  hi: {
    ADD_MUTED_WORD: 'म्यूट किया गया शब्द जोड़ें',
    HOME: 'होम',
    LATEST_TWEETS: 'नवीनतम ट्वीट्स',
    QUOTE_TWEET: 'कोट ट्वीट',
    QUOTE_TWEETS: 'कोट ट्वीट्स',
    RETWEETS: 'रीट्वीट्स',
    SHARED_TWEETS: 'साझा किए गए ट्वीट',
  },
  hr: {
    ADD_MUTED_WORD: 'Dodaj onemogućenu riječ',
    HOME: 'Naslovnica',
    LATEST_TWEETS: 'Najnoviji tweetovi',
    QUOTE_TWEET: 'Citiraj Tweet',
    QUOTE_TWEETS: 'Citirani tweetovi',
    RETWEETS: 'Proslijeđeni tweetovi',
    SHARED_TWEETS: 'Dijeljeni tweetovi',
  },
  hu: {
    ADD_MUTED_WORD: 'Elnémított szó hozzáadása',
    HOME: 'Kezdőlap',
    LATEST_TWEETS: 'A legfrissebb Tweetek',
    QUOTE_TWEET: 'Tweet idézése',
    QUOTE_TWEETS: 'Tweet-idézések',
    RETWEETS: 'Retweetek',
    SHARED_TWEETS: 'Megosztott tweetek',
  },
  id: {
    ADD_MUTED_WORD: 'Tambahkan kata kunci yang dibisukan',
    HOME: 'Beranda',
    LATEST_TWEETS: 'Tweet Terbaru',
    QUOTE_TWEET: 'Kutip Tweet',
    QUOTE_TWEETS: 'Kutip Tweet',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Tweet yang Dibagikan',
  },
  it: {
    ADD_MUTED_WORD: 'Aggiungi parola o frase silenziata',
    HOME: 'Home',
    LATEST_TWEETS: 'Tweet più recenti',
    QUOTE_TWEET: 'Cita il Tweet',
    QUOTE_TWEETS: 'Tweet di citazione',
    RETWEETS: 'Retweet',
    SHARED_TWEETS: 'Tweet condivisi',
  },
  ja: {
    ADD_MUTED_WORD: 'ミュートするキーワードを追加',
    HOME: 'ホーム',
    LATEST_TWEETS: '最新ツイート',
    QUOTE_TWEET: '引用ツイート',
    QUOTE_TWEETS: '引用ツイート',
    RETWEETS: 'リツイート',
    SHARED_TWEETS: '共有ツイート',
  },
  kn: {
    ADD_MUTED_WORD: 'ಸದ್ದಡಗಿಸಿದ ಪದವನ್ನು ಸೇರಿಸಿ',
    HOME: 'ಹೋಮ್',
    LATEST_TWEETS: 'ಇತ್ತೀಚಿನ ಟ್ವೀಟ್‌ಗಳು',
    QUOTE_TWEET: 'ಟ್ವೀಟ್ ಕೋಟ್ ಮಾಡಿ',
    QUOTE_TWEETS: 'ಕೋಟ್ ಟ್ವೀಟ್‌ಗಳು',
    RETWEETS: 'ಮರುಟ್ವೀಟ್‌ಗಳು',
    SHARED_TWEETS: 'ಹಂಚಿದ ಟ್ವೀಟ್‌ಗಳು',
  },
  ko: {
    ADD_MUTED_WORD: '뮤트할 단어 추가하기',
    HOME: '홈',
    LATEST_TWEETS: '최신 트윗',
    QUOTE_TWEET: '트윗 인용하기',
    QUOTE_TWEETS: '트윗 인용하기',
    RETWEETS: '리트윗',
    SHARED_TWEETS: '공유 트윗',
    TWITTER: '트위터',
  },
  mr: {
    ADD_MUTED_WORD: 'म्यूट केलेले शब्द सामील करा',
    HOME: 'होम',
    LATEST_TWEETS: 'अगदी अलीकडच्या ट्विट्स',
    QUOTE_TWEET: 'ट्विट वर भाष्य करा',
    QUOTE_TWEETS: 'भाष्य ट्विट्स',
    RETWEETS: 'पुनर्ट्विट्स',
    SHARED_TWEETS: 'सामायिक ट्विट',
  },
  ms: {
    ADD_MUTED_WORD: 'Tambahkan perkataan yang disenyapkan',
    HOME: 'Laman Utama',
    LATEST_TWEETS: 'Tweet terkini',
    QUOTE_TWEET: 'Petik Tweet',
    QUOTE_TWEETS: 'Tweet Petikan',
    RETWEETS: 'Tweet semula',
    SHARED_TWEETS: 'Tweet Berkongsi',
  },
  nb: {
    ADD_MUTED_WORD: 'Skjul nytt ord',
    HOME: 'Hjem',
    LATEST_TWEETS: 'De nyeste tweetene',
    QUOTE_TWEET: 'Sitat-Tweet',
    QUOTE_TWEETS: 'Sitat-Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Delte tweets',
  },
  nl: {
    ADD_MUTED_WORD: 'Genegeerd woord toevoegen',
    HOME: 'Startpagina',
    LATEST_TWEETS: 'Nieuwste Tweets',
    QUOTE_TWEET: 'Citeer Tweet',
    QUOTE_TWEETS: 'Geciteerde Tweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Gedeelde Tweets',
  },
  pl: {
    ADD_MUTED_WORD: 'Dodaj wyciszone słowo',
    HOME: 'Główna',
    LATEST_TWEETS: 'Najnowsze Tweety',
    QUOTE_TWEET: 'Cytuj Tweeta',
    QUOTE_TWEETS: 'Cytatów z Tweeta',
    RETWEETS: 'Tweety podane dalej',
    SHARED_TWEETS: 'Udostępnione Tweety',
  },
  pt: {
    ADD_MUTED_WORD: 'Adicionar palavra silenciada',
    HOME: 'Página Inicial',
    LATEST_TWEETS: 'Tweets Mais Recentes',
    QUOTE_TWEET: 'Comentar o Tweet',
    QUOTE_TWEETS: 'Tweets com comentário',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Tweets Compartilhados',
  },
  ro: {
    ADD_MUTED_WORD: 'Adaugă cuvântul ignorat',
    HOME: 'Pagina principală',
    LATEST_TWEETS: 'Cele mai recente Tweeturi',
    QUOTE_TWEET: 'Tweet cu citat',
    QUOTE_TWEETS: 'Tweeturi cu citat',
    RETWEETS: 'Retweeturi',
    SHARED_TWEETS: 'Tweeturi partajate',
  },
  ru: {
    ADD_MUTED_WORD: 'Добавить игнорируемое слово',
    HOME: 'Главная',
    LATEST_TWEETS: 'Последние твиты',
    QUOTE_TWEET: 'Цитировать твит',
    QUOTE_TWEETS: 'Твиты с цитатами',
    RETWEETS: 'Ретвиты',
    SHARED_TWEETS: 'Общие твиты',
    TWITTER: 'Твиттер',
  },
  sk: {
    ADD_MUTED_WORD: 'Pridať stíšené slovo',
    HOME: 'Domov',
    LATEST_TWEETS: 'Najnovšie Tweety',
    QUOTE_TWEET: 'Tweet s citátom',
    QUOTE_TWEETS: 'Tweety s citátom',
    RETWEETS: 'Retweety',
    SHARED_TWEETS: 'Zdieľané Tweety',
  },
  sr: {
    ADD_MUTED_WORD: 'Додај игнорисану реч',
    HOME: 'Почетна',
    LATEST_TWEETS: 'Најновији твитови',
    QUOTE_TWEET: 'твит са цитатом',
    QUOTE_TWEETS: 'твит(ов)а са цитатом',
    RETWEETS: 'Ретвитови',
    SHARED_TWEETS: 'Дељени твитови',
    TWITTER: 'Твитер',
  },
  sv: {
    ADD_MUTED_WORD: 'Lägg till ignorerat ord',
    HOME: 'Hem',
    LATEST_TWEETS: 'Senaste tweetsen',
    QUOTE_TWEET: 'Citera Tweet',
    QUOTE_TWEETS: 'Citattweets',
    RETWEETS: 'Retweets',
    SHARED_TWEETS: 'Delade tweetsen',
  },
  ta: {
    ADD_MUTED_WORD: 'செயல்மறைத்த வார்த்தையைச் சேர்',
    HOME: 'முகப்பு',
    LATEST_TWEETS: 'சமீபத்திய கீச்சுகள்',
    QUOTE_TWEET: 'ட்விட்டை மேற்கோள் காட்டு',
    QUOTE_TWEETS: 'மேற்கோள் கீச்சுகள்',
    RETWEETS: 'மறுகீச்சுகள்',
    SHARED_TWEETS: 'பகிரப்பட்ட ட்வீட்டுகள்',
  },
  th: {
    ADD_MUTED_WORD: 'เพิ่มคำที่ซ่อน',
    HOME: 'หน้าแรก',
    LATEST_TWEETS: 'ทวีตล่าสุด',
    QUOTE_TWEET: 'อ้างอิงทวีต',
    QUOTE_TWEETS: 'ทวีตและคำพูด',
    RETWEETS: 'รีทวีต',
    SHARED_TWEETS: 'ทวีตที่แชร์',
    TWITTER: 'ทวิตเตอร์',
  },
  tr: {
    ADD_MUTED_WORD: 'Sessize alınacak kelime ekle',
    HOME: 'Anasayfa',
    LATEST_TWEETS: 'En Son Tweetler',
    QUOTE_TWEET: 'Alıntı Tweet',
    QUOTE_TWEETS: 'Alıntı Tweetler',
    RETWEETS: 'Retweetler',
    SHARED_TWEETS: 'Paylaşılan Tweetler',
  },
  uk: {
    ADD_MUTED_WORD: 'Додати слово до списку ігнорування',
    HOME: 'Головна',
    LATEST_TWEETS: 'Найновіші твіти',
    QUOTE_TWEET: 'Цитувати твіт',
    QUOTE_TWEETS: 'Твіти з цитатою',
    RETWEETS: 'Ретвіти',
    SHARED_TWEETS: 'Спільні твіти',
    TWITTER: 'Твіттер',
  },
  ur: {
    ADD_MUTED_WORD: 'خاموش کردہ لفظ شامل کریں',
    HOME: 'سرورق',
    LATEST_TWEETS: 'جدید ترین ٹویٹ',
    QUOTE_TWEET: 'ٹویٹ اقتباس کریں',
    QUOTE_TWEETS: 'ٹویٹ کو نقل کرو',
    RETWEETS: 'ریٹویٹس',
    SHARED_TWEETS: 'مشترکہ ٹویٹس',
    TWITTER: 'ٹوئٹر',
  },
  vi: {
    ADD_MUTED_WORD: 'Thêm từ tắt tiếng',
    HOME: 'Trang chủ',
    LATEST_TWEETS: 'Tweet mới nhất',
    QUOTE_TWEET: 'Trích dẫn Tweet',
    QUOTE_TWEETS: 'Tweet trích dẫn',
    RETWEETS: 'Các Tweet lại',
    SHARED_TWEETS: 'Tweet được chia sẻ',
  },
  'zh-Hant': {
    ADD_MUTED_WORD: '加入靜音文字',
    HOME: '首頁',
    LATEST_TWEETS: '最新推文',
    QUOTE_TWEET: '引用推文',
    QUOTE_TWEETS: '引用的推文',
    RETWEETS: '轉推',
    SHARED_TWEETS: '分享的推文',
  },
  zh: {
    ADD_MUTED_WORD: '添加要隐藏的字词',
    HOME: '主页',
    LATEST_TWEETS: '最新推文',
    QUOTE_TWEET: '引用推文',
    QUOTE_TWEETS: '引用推文',
    RETWEETS: '转推',
    SHARED_TWEETS: '分享的推文',
  },
}

/**
 * @param {import("./types").LocaleKey} code
 * @returns {string}
 */
function getString(code) {
  return (locales[lang] || locales['en'])[code] || locales['en'][code];
}
//#endregion

//#region Config & variables
/** @enum {string} */
const PagePaths = {
  ADD_MUTED_WORD: '/settings/add_muted_keyword',
  BOOKMARKS: '/i/bookmarks',
  COMPOSE_MESSAGE: '/messages/compose',
  COMPOSE_TWEET: '/compose/tweet',
  CONNECT: '/i/connect',
  CUSTOMIZE_YOUR_VIEW: '/i/display',
  HOME: '/home',
  NOTIFICATION_TIMELINE: '/i/timeline',
  PROFILE_SETTINGS: '/settings/profile',
  SEARCH: '/search',
}

/** @enum {string} */
const Selectors = {
  DISPLAY_DONE_BUTTON_DESKTOP: '#layers div[role="button"]:not([aria-label])',
  DISPLAY_DONE_BUTTON_MOBILE: 'main div[role="button"]:not([aria-label])',
  MESSAGES_DRAWER: 'div[data-testid="DMDrawer"]',
  NAV_HOME_LINK: 'a[data-testid="AppTabBar_Home_Link"]',
  PRIMARY_COLUMN: 'div[data-testid="primaryColumn"]',
  PRIMARY_NAV_DESKTOP: 'header nav',
  PRIMARY_NAV_MOBILE: '#layers nav',
  PROMOTED_TWEET_CONTAINER: '[data-testid="placementTracking"]',
  SIDEBAR: 'div[data-testid="sidebarColumn"]',
  SIDEBAR_WRAPPERS: 'div[data-testid="sidebarColumn"] > div > div > div > div > div',
  TIMELINE: 'div[data-testid="primaryColumn"] section > h1 + div[aria-label] > div',
  TIMELINE_HEADING: 'h2[role="heading"]',
  TWEET: 'div[data-testid="tweet"]',
  VERIFIED_TICK: 'svg path[d^="M22.5 12.5c0-1.58-.875-2.95-2.148-3.6.154-.435.238-.905.238-1.4 0-2.21-1.71-3.998-3.818-3.998-.47"]',
}

/** @enum {string} */
const Svgs = {
  HOME: '<g><path d="M22.46 7.57L12.357 2.115c-.223-.12-.49-.12-.713 0L1.543 7.57c-.364.197-.5.652-.303 1.017.135.25.394.393.66.393.12 0 .243-.03.356-.09l.815-.44L4.7 19.963c.214 1.215 1.308 2.062 2.658 2.062h9.282c1.352 0 2.445-.848 2.663-2.087l1.626-11.49.818.442c.364.193.82.06 1.017-.304.196-.363.06-.818-.304-1.016zm-4.638 12.133c-.107.606-.703.822-1.18.822H7.36c-.48 0-1.075-.216-1.178-.798L4.48 7.69 12 3.628l7.522 4.06-1.7 12.015z"></path><path d="M8.22 12.184c0 2.084 1.695 3.78 3.78 3.78s3.78-1.696 3.78-3.78-1.695-3.78-3.78-3.78-3.78 1.696-3.78 3.78zm6.06 0c0 1.258-1.022 2.28-2.28 2.28s-2.28-1.022-2.28-2.28 1.022-2.28 2.28-2.28 2.28 1.022 2.28 2.28z"></path></g>',
  MUTE: '<g><path d="M1.75 22.354c-.192 0-.384-.073-.53-.22-.293-.293-.293-.768 0-1.06L20.395 1.898c.293-.294.768-.294 1.06 0s.294.767 0 1.06L2.28 22.135c-.146.146-.338.22-.53.22zm1.716-5.577c-.134 0-.27-.036-.392-.11-.67-.413-1.07-1.13-1.07-1.917v-5.5c0-1.24 1.01-2.25 2.25-2.25H6.74l7.047-5.588c.225-.18.533-.215.792-.087.258.125.423.387.423.675v3.28c0 .415-.336.75-.75.75s-.75-.335-.75-.75V3.553L7.47 8.338c-.134.104-.298.162-.467.162h-2.75c-.413 0-.75.337-.75.75v5.5c0 .263.134.5.356.64.353.216.462.678.245 1.03-.14.23-.387.357-.64.357zm10.787 5.973c-.166 0-.33-.055-.466-.162l-4.795-3.803c-.325-.258-.38-.73-.122-1.054.258-.322.73-.38 1.054-.12l3.58 2.838v-7.013c0-.414.335-.75.75-.75s.75.336.75.75V22c0 .288-.166.55-.425.675-.104.05-.216.075-.327.075z"></path></g>',
  RETWEET: '<g><path d="M23.77 15.67c-.292-.293-.767-.293-1.06 0l-2.22 2.22V7.65c0-2.068-1.683-3.75-3.75-3.75h-5.85c-.414 0-.75.336-.75.75s.336.75.75.75h5.85c1.24 0 2.25 1.01 2.25 2.25v10.24l-2.22-2.22c-.293-.293-.768-.293-1.06 0s-.294.768 0 1.06l3.5 3.5c.145.147.337.22.53.22s.383-.072.53-.22l3.5-3.5c.294-.292.294-.767 0-1.06zm-10.66 3.28H7.26c-1.24 0-2.25-1.01-2.25-2.25V6.46l2.22 2.22c.148.147.34.22.532.22s.384-.073.53-.22c.293-.293.293-.768 0-1.06l-3.5-3.5c-.293-.294-.768-.294-1.06 0l-3.5 3.5c-.294.292-.294.767 0 1.06s.767.293 1.06 0l2.22-2.22V16.7c0 2.068 1.683 3.75 3.75 3.75h5.85c.414 0 .75-.336.75-.75s-.337-.75-.75-.75z"></path></g>',
}

const MOBILE_LOGGED_OUT_URLS = ['/', '/login', '/i/flow/signup']
const PROFILE_FOLLOWS_URL_RE = /\/[a-zA-Z\d_]{1,15}\/(following|followers|followers_you_follow)\/?$/
const PROFILE_TABS_URL_RE = /\/[a-zA-Z\d_]{1,15}\/(with_replies|media|likes)\/?$/
// https://twitter.com/${user}'s title ends with (@${user})
const PROFILE_TITLE_RE = /\(@[a-zA-Z\d_]{1,15}\)$/
const THEME_COLORS = new Set([
  'rgb(29, 161, 242)', // blue
  'rgb(255, 173, 31)', // yellow
  'rgb(224, 36, 94)',  // pink
  'rgb(121, 75, 196)', // purple
  'rgb(244, 93, 34)',  // orange
  'rgb(23, 191, 99)',  // green
])
const TITLE_NOTIFICATION_RE = /^\(\d+\+?\) /
const URL_PHOTO_RE = /photo\/\d$/
const URL_TWEET_ID_RE = /\/status\/(\d+)$/

/** `true` when a 'Block @${user}' menu item was seen in the last popup. */
let blockMenuItemSeen = false

/** `'Home'` or `'Latest Tweets'` page title. */
let currentMainTimelineType = ''

/** Notification count in the title (including trailing space), e.g. `'(1) '`. */
let currentNotificationCount = ''

/** Title of the current page, without the `' / Twitter'` suffix. */
let currentPage = ''

/** Current `location.pathname`. */
let currentPath = ''

/**
 * CSS rule in the React Native stylesheet which defines the Chirp font-family
 * and fallbacks for the whole app.
 * @type {CSSStyleRule}
 */
let fontFamilyRule = null

/** Set to `true` when a Home/Latest Tweets heading or Home nav link is used. */
let homeNavigationIsBeingUsed = false

/**
 * Cache for the last page title which was used for the main timeline.
 * @type {string}
 */
let lastMainTimelineTitle = null

/** `true` when `<title>` has appeared and we're observing it for changes. */
let observingTitle = false

/**
 * MutationObservers active on the current page, or anything else we want to
 * clean up when the user moves off the current page.
 * @type {(MutationObserver|{disconnect(): void})[]}
 */
let pageObservers = []

/**
 * Title for the fake timeline used to separate out retweets and quote tweets.
 * @type {string}
 */
let separatedTweetsTimelineTitle = null

/**
 * The current "Color" setting, which can be changed in "Customize your view".
 * @type {string}
 */
let themeColor = null

function isOnExplorePage() {
  return currentPath.startsWith('/explore')
}

function isOnHomeTimeline() {
  return currentPage == getString('HOME')
}

function isOnIndividualTweetPage() {
  return URL_TWEET_ID_RE.test(currentPath)
}

function isOnLatestTweetsTimeline() {
  return currentPage == getString('LATEST_TWEETS')
}

function isOnListsPage() {
  return currentPath.endsWith('/lists') || currentPath.startsWith('/i/lists')
}

function isOnMainTimelinePage() {
  return currentPath == PagePaths.HOME || (
    currentPath == PagePaths.CUSTOMIZE_YOUR_VIEW &&
    isOnHomeTimeline() ||
    isOnLatestTweetsTimeline() ||
    isOnSeparatedTweetsTimeline()
  )
}

function isOnNotificationsPage() {
  return currentPath.startsWith('/notifications')
}

function isOnProfilePage() {
  return PROFILE_TITLE_RE.test(currentPage) && !PROFILE_FOLLOWS_URL_RE.test(currentPath)
}

function isOnQuoteTweetsPage() {
  return currentPath.endsWith('/retweets/with_comments')
}

function isOnSeparatedTweetsTimeline() {
  return currentPage == separatedTweetsTimelineTitle
}

function isOnTopicsPage() {
  return currentPath != '/topics' && Boolean(currentPath.match(/\/topics(\/|$)/))
}

function shouldHideSidebar() {
  return isOnExplorePage()
}
//#endregion

//#region Utility functions
/**
 * @param {string} role
 * @return {HTMLStyleElement}
 */
function addStyle(role) {
  let $style = document.createElement('style')
  $style.dataset.insertedBy = 'tweak-new-twitter'
  $style.dataset.role = role
  document.head.appendChild($style)
  return $style
}

/**
 * @param {string} str
 * @return {string}
 */
function dedent(str) {
  str = str.replace(/^[ \t]*\r?\n/, '')
  let indent = /^[ \t]+/m.exec(str)
  if (indent) str = str.replace(new RegExp('^' + indent[0], 'gm'), '')
  return str.replace(/(\r?\n)[ \t]+$/, '$1')
}

/**
 * @param {string} selector
 * @param {{
 *   name?: string
 *   stopIf?: () => boolean
 *   timeout?: number
 *   context?: Document | HTMLElement
 * }} [options]
 * @returns {Promise<HTMLElement | null>}
 */
function getElement(selector, {
  name = null,
  stopIf = null,
  timeout = Infinity,
  context = document,
} = {}) {
  return new Promise((resolve) => {
    let startTime = Date.now()
    let rafId
    let timeoutId

    function stop($element, reason) {
      if ($element == null) {
        log(`stopped waiting for ${name || selector} after ${reason}`)
      }
      else if (Date.now() > startTime) {
        log(`${name || selector} appeared after ${Date.now() - startTime}ms`)
      }
      if (rafId) {
        cancelAnimationFrame(rafId)
      }
      if (timeoutId) {
        clearTimeout(timeoutId)
      }
      resolve($element)
    }

    if (timeout !== Infinity) {
      timeoutId = setTimeout(stop, timeout, null, `${timeout}ms timeout`)
    }

    function queryElement() {
      let $element = context.querySelector(selector)
      if ($element) {
        stop($element)
      }
      else if (stopIf?.() === true) {
        stop(null, 'stopIf condition met')
      }
      else {
        rafId = requestAnimationFrame(queryElement)
      }
    }

    queryElement()
  })
}

function log(...args) {
  if (enableDebugLogging) {
    console.log(`🧨${currentPage ? `(${currentPage})` : ''}`, ...args)
  }
}

/**
 * @param {() => boolean} condition
 * @returns {() => boolean}
 */
 function not(condition) {
  return () => !condition()
}

/**
 * Convenience wrapper for the MutationObserver API - the callback is called
 * immediately to support using an observer and its options as a trigger for any
 * change, without looking at MutationRecords.
 * @param {Node} $element
 * @param {MutationCallback} callback
 * @param {MutationObserverInit} options
 */
function observeElement($element, callback, options = {childList: true}) {
  let observer = new MutationObserver(callback)
  callback([], observer)
  observer.observe($element, options)
  return observer
}

/**
 * @param {string} page
 * @returns {() => boolean}
 */
function pageIsNot(page) {
  return () => page != currentPage
}

/**
 * @param {string} path
 * @returns {() => boolean}
 */
function pathIsNot(path) {
  return () => path != currentPath
}

/**
 * @param {number} n
 * @returns {string}
 */
function s(n) {
  return n == 1 ? '' : 's'
}
//#endregion

//#region Global observers
function checkReactNativeStylesheet() {
  let $style = /** @type {HTMLStyleElement} */ (document.querySelector('style#react-native-stylesheet'))
  if (!$style) {
    log('React Native stylesheet not found')
    return
  }

  for (let rule of $style.sheet.cssRules) {
    if (!(rule instanceof CSSStyleRule)) continue

    if (fontFamilyRule == null &&
        rule.style.fontFamily &&
        rule.style.fontFamily.includes('TwitterChirp')) {
      fontFamilyRule = rule
      log('found Chirp fontFamily CSS rule in React Native stylesheet')
      configureFont()
    }

    if (themeColor == null &&
        rule.style.backgroundColor &&
        THEME_COLORS.has(rule.style.backgroundColor)) {
      themeColor = rule.style.backgroundColor
      log(`found initial theme color in React Native stylesheet: ${themeColor}`)
      configureThemeCss()
    }
  }

  if (fontFamilyRule == null || themeColor == null) {
    setTimeout(checkReactNativeStylesheet, 100)
  } else {
    log('finished checking React Native stylesheet')
  }
}

/**
 * When the "Background" setting is changed in "Customize your view", <body>'s
 * backgroundColor is changed and the app is re-rendered, so we need to
 * re-process the current page.
 */
function observeBackgroundColor() {
  let lastBackgroundColor = null

  log('observing body style attribute for backgroundColor changes')
  observeElement($body, () => {
    let backgroundColor = $body.style.backgroundColor
    if (backgroundColor == lastBackgroundColor) return

    $body.classList.toggle('Default', backgroundColor == 'rgb(255, 255, 255)')
    $body.classList.toggle('Dim', backgroundColor == 'rgb(21, 32, 43)')
    $body.classList.toggle('LightsOut', backgroundColor == 'rgb(0, 0, 0)')

    if (lastBackgroundColor != null) {
      log('Background setting changed - re-processing current page')
      observePopups()
      processCurrentPage()
    }
    lastBackgroundColor = backgroundColor
  }, {
    attributes: true,
    attributeFilter: ['style']
  })
}

/**
 * When the "Color" setting is changed in "Customize your view", the app
 * re-renders from a certain point, so we need to re-process the current page.
 */
async function observeColor() {
  let $primaryColorRerenderBoundary = await getElement('#react-root > div > div')

  log('observing Color change re-renders')
  observeElement($primaryColorRerenderBoundary, async () => {
    if (location.pathname != PagePaths.CUSTOMIZE_YOUR_VIEW) return

    let $doneButton = await getElement(desktop ? Selectors.DISPLAY_DONE_BUTTON_DESKTOP : Selectors.DISPLAY_DONE_BUTTON_MOBILE, {
      name: 'Done button',
      stopIf: pathIsNot(location.pathname),
    })
    if (!$doneButton) return

    let color = getComputedStyle($doneButton).backgroundColor
    if (color == themeColor) return

    log('Color setting changed - re-processing current page')
    themeColor = color
    configureThemeCss()
    observePopups()
    processCurrentPage()
  })
}

/**
 * When the "Font size" setting is changed in "Customize your view", `<html>`'s
 * fontSize is changed, after which we need to update nav font size accordingly.
 */
const observeFontSize = (function() {
  if (mobile) return () => {}

  /** @type {MutationObserver} */
  let fontSizeObserver
  let $style = addStyle('nav-font-size')

  return function observeFontSize() {
    if (fontSizeObserver) {
      log('disconnecting previous font size observer')
      fontSizeObserver.disconnect()
      fontSizeObserver = null
    }

    if (!config.navBaseFontSize) {
      $style.textContent = ''
      return
    }

    let lastFontSize = ''

    log('observing html style attribute for fontSize changes')
    fontSizeObserver = observeElement($html, () => {
      if ($html.style.fontSize) {
        if ($html.style.fontSize!= lastFontSize) {
          lastFontSize = $html.style.fontSize
          log(`setting nav font size to ${lastFontSize}`)
          $style.textContent = dedent(`
            ${Selectors.PRIMARY_NAV_DESKTOP} div[dir="auto"] span { font-size: ${lastFontSize}; font-weight: normal; }
            ${Selectors.PRIMARY_NAV_DESKTOP} div[dir="auto"] { margin-top: -4px; }
          `)
        }

        // Try to avoid excessive reprocessing on init
        if (observingTitle) {
          log('html style attribute changed, re-processing current page')
          observePopups()
          processCurrentPage()
        }
      }
    }, {
      attributes: true,
      attributeFilter: ['style']
    })
  }
})()

const observePopups = (function() {
  /** @type {MutationObserver} */
  let popupObserver
  /** @type {WeakMap<HTMLElement, MutationObserver>} */
  let nestedObservers = new WeakMap()

  return async function observePopups() {
    if (popupObserver) {
      popupObserver.disconnect()
      popupObserver = null
    }

    if (!(config.addAddMutedWordMenuItem || config.fastBlock)) return

    let $keyboardWrapper = await getElement('[data-at-shortcutkeys]', {
      name: 'keyboard wrapper',
    })

    // There can be only one
    if (popupObserver) {
      popupObserver.disconnect()
    }

    log(`${popupObserver ? 're-' : ''}observing popups`)
    popupObserver = observeElement($keyboardWrapper.previousElementSibling, (mutations) => {
      mutations.forEach((mutation) => {
        mutation.addedNodes.forEach((/** @type {HTMLElement} */ $el) => {
          let observer = onPopup($el)
          if (observer) {
            nestedObservers.set($el, observer)
          }
        })
        mutation.removedNodes.forEach((/** @type {HTMLElement} */ $el) => {
          if (nestedObservers.has($el)) {
            nestedObservers.get($el).disconnect()
            nestedObservers.delete($el)
          }
        })
      })
    })
  }
})()

async function observeTitle() {
  let $title = await getElement('title', {name: '<title>'})
  observingTitle = true
  log('observing <title>')
  observeElement($title, () => onTitleChange($title.textContent))
}
//#endregion

//#region Page observers
/**
 * If a profile is blocked its media box won't appear, add a `Blocked` class to
 * `<body>` to hide sidebar content.
 * @param {string} currentPage
 */
async function observeProfileBlockedStatus(currentPage) {
  let $buttonContainer = await getElement(`[data-testid="userActions"] ~ [data-testid="placementTracking"], a[href="${PagePaths.PROFILE_SETTINGS}"]`, {
    name: 'Follow / Unblock button container or Edit profile button',
    stopIf: pageIsNot(currentPage),
  })
  if ($buttonContainer == null) return

  if ($buttonContainer.hasAttribute('href')) {
    log('on own profile page')
    $body.classList.remove('Blocked')
    return
  }

  log('observing Follow / Unblock button container for blocked status changes')
  pageObservers.push(
    observeElement($buttonContainer, () => {
      let isBlocked = (/** @type {HTMLElement} */ ($buttonContainer.querySelector('[role="button"]'))?.dataset.testid ?? '').endsWith('unblock')
      $body.classList.toggle('Blocked', isBlocked)
    })
  )
}

/**
 * If an account has never tweeted any media, add a `NoMedia` class to `<body>`
 * to hide the "You might like" section which will appear where the media box
 * would have been.
 * @param {string} currentPage
 */
async function observeProfileSidebar(currentPage) {
  let $sidebarContent = await getElement(Selectors.SIDEBAR_WRAPPERS, {
    name: 'profile sidebar content container',
    stopIf: pageIsNot(currentPage),
  })
  if ($sidebarContent == null) return

  log('observing profile sidebar content container')
  let sidebarContentObserver = observeElement($sidebarContent, () => {
    $body.classList.toggle('NoMedia', $sidebarContent.childElementCount == 5)
  })
  pageObservers.push(sidebarContentObserver)

  // On initial appearance, the sidebar is injected with static HTML with
  // spinner placeholders, which gets replaced. When this happens we need to
  // observe the new content container instead.
  let $sidebarContentParent = $sidebarContent.parentElement
  pageObservers.push(
    observeElement($sidebarContentParent, (mutations) => {
      let sidebarContentReplaced = mutations.some(mutation => Array.from(mutation.removedNodes).includes($sidebarContent))
      if (sidebarContentReplaced) {
        log('profile sidebar content container replaced, observing new container')
        sidebarContentObserver.disconnect()
        pageObservers.splice(pageObservers.indexOf(sidebarContentObserver), 1)
        $sidebarContent = /** @type {HTMLElement} */ ($sidebarContentParent.firstElementChild)
        pageObservers.push(
          observeElement($sidebarContent, () => {
            $body.classList.toggle('NoMedia', $sidebarContent.childElementCount == 5)
          })
        )
      }
    })
  )
}

async function observeTimeline(page) {
  let $timeline = await getElement(Selectors.TIMELINE, {
    name: 'timeline',
    stopIf: pageIsNot(page),
  })

  if ($timeline == null) return

  // The inital timeline element is a placeholder without a style attribute
  if ($timeline.hasAttribute('style')) {
    log('observing timeline', {$timeline})
    pageObservers.push(
      observeElement($timeline, () => onTimelineChange($timeline, page))
    )
  }
  else {
    log('waiting for timeline')
    let startTime = Date.now()
    pageObservers.push(
      observeElement($timeline.parentNode, (mutations) => {
        mutations.forEach((mutation) => {
          mutation.addedNodes.forEach(($timeline) => {
            if (Date.now() > startTime) {
              log(`timeline appeared after ${Date.now() - startTime}ms`)
            }
            log('observing timeline', {$timeline})
            pageObservers.push(
              observeElement($timeline, () => onTimelineChange($timeline, page))
            )
          })
        })
      })
    )
  }
}
//#endregion

//#region Tweak functions
/**
 * Add an "Add muted word" menu item after "Settings and privacy" which takes
 * you straight to entering a new muted word (by clicking its way through all
 * the individual screens!).
 * @param {HTMLElement} $settingsLink
 */
async function addAddMutedWordMenuItem($settingsLink) {
  log('adding "Add muted word" menu item')
  let $addMutedWord = /** @type {HTMLElement} */ ($settingsLink.parentElement.cloneNode(true))
  $addMutedWord.classList.add('tnt_menu_item')
  $addMutedWord.querySelector('a').href = PagePaths.ADD_MUTED_WORD
  $addMutedWord.querySelector('span').textContent = getString('ADD_MUTED_WORD')
  $addMutedWord.querySelector('svg').innerHTML = Svgs.MUTE
  $addMutedWord.addEventListener('click', (e) => {
    e.preventDefault()
    addMutedWord()
  })
  $settingsLink.parentElement.insertAdjacentElement('afterend', $addMutedWord)
}

async function addMutedWord() {
  for (let path of [
    '/settings',
    '/settings/privacy_and_safety',
    '/settings/mute_and_block',
    '/settings/muted_keywords',
    '/settings/add_muted_keyword',
  ]) {
    let $link = await getElement(`a[href="${path}"]`)
    if (!$link) return
    $link.click()
  }
  let $input = await getElement('input[name="keyword"]')
  setTimeout(() => $input.focus(), 100)
}

async function addSeparatedTweetsTimelineControl(page) {
  if (desktop) {
    let $timelineTitle = await getElement('main h2', {
      name: 'timeline title',
      stopIf: pageIsNot(page),
    })

    if ($timelineTitle == null) return

    let $newHeading = document.querySelector('#tnt_separated_tweets')
    if ($newHeading) {
      log('separated tweets timeline heading already present')
      $newHeading.querySelector('span').textContent = separatedTweetsTimelineTitle
      return
    }

    log('inserting separated tweets timeline heading')
    $newHeading = /** @type {HTMLElement} */ ($timelineTitle.parentElement.cloneNode(true))
    $newHeading.querySelector('h2').id = 'tnt_separated_tweets'
    $newHeading.querySelector('span').textContent = separatedTweetsTimelineTitle

    // This script assumes navigation has occurred when the document title
    // changes, so by changing the title we fake navigation to a non-existent
    // page representing the separated tweets timeline.
    $newHeading.addEventListener('click', () => {
      if (!document.title.startsWith(separatedTweetsTimelineTitle)) {
        setTitle(separatedTweetsTimelineTitle)
      }
      window.scrollTo({top: 0})
    })
    $timelineTitle.parentElement.parentElement.insertAdjacentElement('afterend', $newHeading)

    // Return to the main timeline when Latest Tweets / Home heading is clicked
    $timelineTitle.parentElement.addEventListener('click', () => {
      if (!document.title.startsWith(currentMainTimelineType)) {
        homeNavigationIsBeingUsed = true
        setTitle(currentMainTimelineType)
      }
    })

    // Return to the main timeline when the Home nav link is clicked
    let $homeNavLink = /** @type {HTMLElement} */ (document.querySelector(Selectors.NAV_HOME_LINK))
    if (!$homeNavLink.dataset.tweakNewTwitterListener) {
      $homeNavLink.addEventListener('click', () => {
        homeNavigationIsBeingUsed = true
        if (location.pathname == '/home' && !document.title.startsWith(currentMainTimelineType)) {
          setTitle(currentMainTimelineType)
        }
      })
      $homeNavLink.dataset.tweakNewTwitterListener = 'true'
    }
  }

  if (mobile) {
    let $timelineTitle = await getElement('header h2', {
      name: 'timeline title',
      stopIf: pageIsNot(page),
    })

    if ($timelineTitle == null) return

    // We hide the existing timeline title via CSS when it's not wanted instead
    // of changing its text, as those changes persist when you view a tweet.
    $timelineTitle.classList.add('tnt_home_timeline_title')
    removeMobileTimelineHeaderElements()

    log('inserting separated tweets timeline switcher')

    let $toggle = document.createElement('div')
    $toggle.id = 'tnt_switch_timeline'
    let toggleColor = getComputedStyle(document.querySelector(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/home"] svg`)).color
    $toggle.innerHTML = `<svg viewBox="0 0 24 24" aria-hidden="true" style="color: ${toggleColor}; width: 22px; vertical-align: text-bottom; position: relative; max-width: 100%; height: 22px; fill: currentcolor; display: inline-block;">
      ${page == separatedTweetsTimelineTitle ? Svgs.HOME : Svgs.RETWEET}
    </svg>`
    $toggle.style.cursor = 'pointer'
    $toggle.title = `Switch to ${page == currentMainTimelineType ? separatedTweetsTimelineTitle : currentMainTimelineType}`
    $toggle.addEventListener('click', () => {
      let newTitle = page == separatedTweetsTimelineTitle ? currentMainTimelineType : separatedTweetsTimelineTitle
      setTitle(newTitle)
      $toggle.title = `Switch to ${newTitle == currentMainTimelineType ? separatedTweetsTimelineTitle : currentMainTimelineType}`
      window.scrollTo({top: 0})
    })
    $timelineTitle.insertAdjacentElement('afterend', $toggle)
    if (page == separatedTweetsTimelineTitle) {
      let $sharedTweetsTitle = /** @type {HTMLElement} */ ($timelineTitle.cloneNode(true))
      $sharedTweetsTitle.querySelector('span').textContent = separatedTweetsTimelineTitle
      $sharedTweetsTitle.id = 'tnt_shared_tweets_timeline_title'
      $sharedTweetsTitle.classList.remove('tnt_home_timeline_title')
      $timelineTitle.insertAdjacentElement('afterend', $sharedTweetsTitle)
    }
    $timelineTitle.parentElement.classList.add('tnt_mobile_header')

    // Go back to the main timeline when the Home bottom nav link is clicked on
    // the shared tweets timeline.
    let $homeBottomNavItem = /** @type {HTMLElement} */ (document.querySelector(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/home"]`))
    if (!$homeBottomNavItem.dataset.tweakNewTwitterListener) {
      $homeBottomNavItem.addEventListener('click', () => {
        if (location.pathname == '/home' && currentPage == separatedTweetsTimelineTitle) {
          setTitle(currentMainTimelineType)
        }
      })
      $homeBottomNavItem.dataset.tweakNewTwitterListener = 'true'
    }
  }
}

/**
 * Redirects away from the home timeline if we're on it and it's been disabled.
 * @returns {boolean} `true` if redirected as a result of this call
 */
function checkforDisabledHomeTimeline() {
  if (config.disableHomeTimeline && location.pathname == '/home') {
    log(`home timeline disabled, redirecting to /${config.disabledHomeTimelineRedirect}`)
    let primaryNavSelector = desktop ? Selectors.PRIMARY_NAV_DESKTOP : Selectors.PRIMARY_NAV_MOBILE
    ;/** @type {HTMLElement} */ (
      document.querySelector(`${primaryNavSelector} a[href="/${config.disabledHomeTimelineRedirect}"]`)
    ).click()
    return true
  }
}

const configureCss = (function() {
  let $style = addStyle('features')

  return function configureCss() {
    let cssRules = []
    let hideCssSelectors = []

    if (config.alwaysUseLatestTweets) {
      // Hide the sparkle when automatically staying on Latest Tweets
      hideCssSelectors.push(mobile
        ? 'body.MainTimeline header div:nth-of-type(3)'
        : `body.MainTimeline ${Selectors.PRIMARY_COLUMN} > div > div:first-of-type > div > div > div > div > div > div:last-of-type`
      )
    }
    if (config.hideAnalyticsNav) {
      hideCssSelectors.push('div[role="dialog"] a[href*="analytics.twitter.com"]')
    }
    if (config.hideBookmarksNav) {
      hideCssSelectors.push('div[role="dialog"] a[href$="/bookmarks"]')
    }
    if (config.hideShareTweetButton) {
      hideCssSelectors.push(
        // Under timeline-style tweets
        '[data-testid="tweet"] [role="group"] > div:nth-of-type(4)',
        // Under individual tweets
        'body.Tweet [data-testid="tweet"] + div > div > [role="group"] > div:nth-of-type(4)',
      )
    }
    if (config.hideListsNav) {
      hideCssSelectors.push('div[role="dialog"] a[href$="/lists"]')
    }
    if (config.hideMetrics) {
      configureHideMetricsCss(cssRules, hideCssSelectors)
    }
    if (config.hideMomentsNav) {
      hideCssSelectors.push('div[role="dialog"] a[href$="/moment_maker"]')
    }
    if (config.hideNewslettersNav) {
      hideCssSelectors.push('div[role="dialog"] a[href$="/newsletters"]')
    }
    if (config.hideTopicsNav) {
      hideCssSelectors.push('div[role="dialog"] a[href$="/topics"]')
    }
    if (config.hideTweetAnalyticsLinks) {
      hideCssSelectors.push(
        // Under timeline-style tweets
        '[data-testid="tweet"] [role="group"] > div:nth-of-type(5)',
        // Under individual tweets
        '[data-testid="analyticsButton"]',
      )
    }
    if (config.hideTwitterAdsNav) {
      hideCssSelectors.push('div[role="dialog"] a[href*="ads.twitter.com"]')
    }
    if (config.hideWhoToFollowEtc) {
      hideCssSelectors.push(`body.Profile ${Selectors.PRIMARY_COLUMN} aside[role="complementary"]`)
    }
    if (config.reducedInteractionMode) {
      hideCssSelectors.push(
        '[data-testid="tweet"] [role="group"]',
        'body.Tweet a:is([href$="/retweets"], [href$="/likes"])',
        'body.Tweet [data-testid="tweet"] + div > [role="group"]',
      )
    }
    if (config.tweakQuoteTweetsPage) {
      // Hide the quoted tweet, which is repeated in every quote tweet
      hideCssSelectors.push('body.QuoteTweets [data-testid="tweet"] [aria-labelledby] > div:last-child')
    }

    if (desktop) {
      if (config.disableHomeTimeline) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/home"]`)
      }
      if (config.hideAccountSwitcher) {
        cssRules.push(`
          header[role="banner"] > div > div > div > div:last-child {
            flex-shrink: 1 !important;
            align-items: flex-end !important;
          }
        `)
        hideCssSelectors.push(
          '[data-testid="SideNav_AccountSwitcher_Button"] > div:first-child:not(:only-child)',
          '[data-testid="SideNav_AccountSwitcher_Button"] > div:first-child + div',
        )
      }
      if (config.addAddMutedWordMenuItem) {
        // Hover colors for custom menu items
        cssRules.push(`
          body.Default .tnt_menu_item a:hover { background-color: rgb(247, 249, 249); }
          body.Dim .tnt_menu_item a:hover { background-color: rgb(25, 39, 52); }
          body.LightsOut .tnt_menu_item a:hover { background-color: rgb(21, 24, 28); }
        `)
      }
      if (config.hideSidebarContent) {
        // Only show the first sidebar item by default
        // Re-show subsequent non-algorithmic sections on specific pages
        cssRules.push(`
          ${Selectors.SIDEBAR_WRAPPERS} > div:not(:first-of-type) {
            display: none;
          }
          body.Profile:not(.Blocked, .NoMedia) ${Selectors.SIDEBAR_WRAPPERS} > div:is(:nth-of-type(2), :nth-of-type(3)) {
            display: block;
          }
        `)
        hideCssSelectors.push(`body.HideSidebar ${Selectors.SIDEBAR}`)
      }
      if (config.hideExploreNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/explore"]`)
      }
      if (config.hideBookmarksNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href="/i/bookmarks"]`)
      }
      if (config.hideListsNav) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_DESKTOP} a[href*="/lists"]`)
      }
      if (config.hideMessagesDrawer) {
        hideCssSelectors.push(Selectors.MESSAGES_DRAWER)
      }
      if (config.retweets != 'separate' && config.quoteTweets != 'separate') {
        hideCssSelectors.push('#tnt_separated_tweets')
      }
      if (!config.tweakQuoteTweetsPage) {
        hideCssSelectors.push('#tnt_pinned_quoted_tweet')
      }
    }

    if (mobile) {
      if (config.disableHomeTimeline) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/home"]`)
      }
      if (config.hideAnalyticsNav && config.hideTwitterAdsNav) {
        // XXX Quick but brittle way to hide the divider above these items
        hideCssSelectors.push('div[role="dialog"] div:nth-of-type(8)[role="separator"]')
      }
      if (config.hideAppNags) {
        cssRules.push(`
          body.Tweet header div:nth-of-type(3) > [role="button"] {
            visibility: hidden;
          }
        `)
        hideCssSelectors.push('.HideAppNags #layers > div')
      }
      if (config.hideExplorePageContents) {
        // Hide explore page contents so we don't get a brief flash of them
        // before automatically switching the page to search mode.
        hideCssSelectors.push(
          'body.Explore header nav',
          'body.Explore main',
        )
      }
      if (config.hideMessagesBottomNavItem) {
        hideCssSelectors.push(`${Selectors.PRIMARY_NAV_MOBILE} a[href="/messages"]`)
      }
      if (config.retweets == 'separate' || config.quoteTweets == 'separate') {
        // Use CSS to tweak layout of mobile header elements on pages where it's
        // needed, as changes made directly to them can persist across pages.
        cssRules.push(`
          body.Home .tnt_mobile_header,
          body.LatestTweets .tnt_mobile_header,
          body.SeparatedTweets .tnt_mobile_header {
            flex-direction: row;
            align-items: center;
            justify-content: space-between;
          }
        `)
        hideCssSelectors.push('body.SeparatedTweets .tnt_home_timeline_title')
      }
    }

    if (hideCssSelectors.length > 0) {
      cssRules.push(`
        ${hideCssSelectors.join(',\n')} {
          display: none !important;
        }
      `)
    }

    $style.textContent = cssRules.map(dedent).join('\n')
  }
})()

function configureFont() {
  if (!fontFamilyRule) {
    log('no fontFamilyRule founnd for configureFont to use')
    return
  }

  if (config.dontUseChirpFont) {
    if (fontFamilyRule.style.fontFamily.includes('TwitterChirp')) {
      fontFamilyRule.style.fontFamily = fontFamilyRule.style.fontFamily.replace(/"?TwitterChirp"?, ?/, '')
      log('disabled Chirp font')
    }
  } else if (!fontFamilyRule.style.fontFamily.includes('TwitterChirp')) {
    fontFamilyRule.style.fontFamily = `"TwitterChirp", ${fontFamilyRule.style.fontFamily}`
    log(`enabled Chirp font`)
  }
}

/**
 * @param {string[]} cssRules
 * @param {string[]} hideCssSelectors
 */
function configureHideMetricsCss(cssRules, hideCssSelectors) {
  if (config.hideFollowingMetrics) {
    // User profile hover card and page metrics
    hideCssSelectors.push(
      ':is(#layers, body.Profile) a:is([href$="/following"], [href$="/followers"]) > :first-child'
    )
    // Fix display of whitespace after hidden metrics
    cssRules.push(
      ':is(#layers, body.Profile) a:is([href$="/following"], [href$="/followers"]) { white-space: pre-line; }'
    )
  }

  if (config.hideTotalTweetsMetrics) {
    // Tweet count under username header on profile pages
    hideCssSelectors.push(
      `body.Profile ${desktop ? Selectors.PRIMARY_COLUMN : 'header'} > div > div:first-of-type h2 + div[dir="auto"]`
    )
  }

  let individualTweetMetricSelectors = [
    config.hideRetweetMetrics    && '[href$="/retweets"]',
    config.hideLikeMetrics       && '[href$="/likes"]',
    config.hideQuoteTweetMetrics && '[href$="/retweets/with_comments"]',
  ].filter(Boolean).join(', ')

  if (individualTweetMetricSelectors) {
    // Individual tweet metrics
    hideCssSelectors.push(`body.Tweet a:is(${individualTweetMetricSelectors}) > :first-child`)
    // Fix display of whitespace after hidden metrics
    cssRules.push(`body.Tweet a:is(${individualTweetMetricSelectors}) { white-space: pre-line; }`)
  }

  let timelineMetricSelectors = [
    config.hideReplyMetrics   && ':nth-of-type(1)',
    config.hideRetweetMetrics && ':nth-of-type(2)',
    config.hideLikeMetrics    && ':nth-of-type(3)',
  ].filter(Boolean).join(', ')

  if (timelineMetricSelectors) {
    // Metrics under timeline-style tweets
    cssRules.push(
      `[data-testid="tweet"] [role="group"] > div:is(${timelineMetricSelectors}) div > span { visibility: hidden;}`
    )
  }
}

/**
 * Configures – or re-configures – the separated tweets timeline title.
 *
 * If we're currently on the separated tweets timeline and…
 * - …its title has changed, the page title will be changed to "navigate" to it.
 * - …the separated tweets timeline is no longer needed, we'll change the page
 *   title to "navigate" back to the main timeline.
 *
 * @returns {boolean} `true` if "navigation" was triggered by this call
 */
function configureSeparatedTweetsTimelineTitle() {
  let wasOnSeparatedTweetsTimeline = isOnSeparatedTweetsTimeline()
  let previousTitle = separatedTweetsTimelineTitle

  if (config.retweets == 'separate' && config.quoteTweets == 'separate') {
    separatedTweetsTimelineTitle = getString('SHARED_TWEETS')
  } else if (config.retweets == 'separate') {
    separatedTweetsTimelineTitle = getString('RETWEETS')
  } else if (config.quoteTweets == 'separate') {
    separatedTweetsTimelineTitle = getString('QUOTE_TWEETS')
  } else {
    separatedTweetsTimelineTitle = null
  }

  let titleChanged = previousTitle != separatedTweetsTimelineTitle
  if (wasOnSeparatedTweetsTimeline) {
    if (separatedTweetsTimelineTitle == null) {
      log('moving from separated tweets timeline to main timeline after config change')
      setTitle(currentMainTimelineType)
      return true
    }
    if (titleChanged) {
      log('applying new separated tweets timeline title after config change')
      setTitle(separatedTweetsTimelineTitle)
      return true
    }
  } else {
    if (titleChanged && previousTitle != null && lastMainTimelineTitle == previousTitle) {
      log('updating lastMainTimelineTitle with new separated tweets timeline title')
      lastMainTimelineTitle = separatedTweetsTimelineTitle
    }
  }
}

const configureThemeCss = (function() {
  let $style = addStyle('theme')

  return function configureThemeCss() {
    let cssRules = []

    if (themeColor != null && desktop && (config.retweets == 'separate' || config.quoteTweets == 'separate')) {
      cssRules.push(`
        body.Home main h2:not(#tnt_separated_tweets),
        body.LatestTweets main h2:not(#tnt_separated_tweets),
        body.SeparatedTweets #tnt_separated_tweets {
          color: ${themeColor};
        }
      `)
    }

    if (themeColor != null && config.uninvertFollowButtons) {
      // Use the theme color for Following buttons
      cssRules.push(`
        [role="button"][data-testid$="-unfollow"]:not(:hover) {
          background-color: ${themeColor};
          border-color: ${themeColor};
        }
        [role="button"][data-testid$="-unfollow"]:not(:hover) > * {
          color: rgb(255, 255, 255);
        }
      `)
      // Shared styles for Follow buttons
      cssRules.push(`
        [role="button"][data-testid$="-follow"] {
          background-color: rgba(0, 0, 0, 0) !important;
        }
      `)
      if (config.followButtonStyle == 'monochrome') {
        cssRules.push(`
          body.Default [role="button"][data-testid$="-follow"] {
            border-color: rgb(207, 217, 222);
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"] {
            border-color: rgb(83, 100, 113);
          }
          body.Default [role="button"][data-testid$="-follow"] > * {
            color: rgb(15, 20, 25);
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"] > * {
            color: rgb(255, 255, 255);
          }
          body.Default [role="button"][data-testid$="-follow"]:hover {
            background-color: rgba(15, 20, 25, 0.1) !important;
          }
          body:is(.Dim, .LightsOut) [role="button"][data-testid$="-follow"]:hover {
            background-color: rgba(255, 255, 255, 0.1) !important;
          }
        `)
      }
      if (config.followButtonStyle == 'themed') {
        cssRules.push(`
          [role="button"][data-testid$="-follow"] {
            border-color: ${themeColor};
          }
          [role="button"][data-testid$="-follow"] > * {
            color: ${themeColor};
          }
          [role="button"][data-testid$="-follow"]:hover {
            background-color: ${themeColor} !important;
          }
          [role="button"][data-testid$="-follow"]:hover > * {
            color: rgb(255, 255, 255);
          }
        `)
      }
    }

    $style.textContent = cssRules.map(dedent).join('\n')
  }
})()

/**
 * Attempts to determine the type of a timeline Tweet given the element with
 * data-testid="tweet" on it, falling back to TWEET if it doesn't appear to be
 * one of the particular types we care about.
 * @param {HTMLElement} $tweet
 * @returns {import("./types").TimelineItemType}
 */
function getTweetType($tweet) {
  if ($tweet.closest(Selectors.PROMOTED_TWEET_CONTAINER)) {
    return 'PROMOTED_TWEET'
  }
  if ($tweet.previousElementSibling?.querySelector('[data-testid="socialContext"]')) {
    if (!config.alwaysUseLatestTweets && currentMainTimelineType == getString('HOME')) {
      let svgPath = $tweet.previousElementSibling.querySelector('svg path')?.getAttribute('d') ?? ''
      if (svgPath.startsWith('M12 21.638h-.014C9.403 21.5')) return 'LIKED'
      if (svgPath.startsWith('M14.046 2.242l-4.148-.01h-.')) return 'REPLIED'
      if (svgPath.startsWith('M18.265 3.314c-3.45-3.45-9.')) return 'SUGGESTED_TOPIC_TWEET'
      // This is the start of the SVG path for the Retweet icon
      if (!svgPath.startsWith('M23.615 15.477c-.47-.47-1.23')) {
        log('unhandled socialContext tweet type - falling back to RETWEET', $tweet)
      }
    }
    // Quoted tweets from accounts you blocked or muted are displayed as an
    // <article> with "This Tweet is unavailable."
    if ($tweet.querySelector('article')) {
      return 'UNAVAILABLE_RETWEET'
    }
    return 'RETWEET'
  }
  // Quoted tweets are preceded by visually-hidden "Quote Tweet" text
  if ($tweet.querySelector('div[id^="id__"] > div[dir="auto"] > span')?.textContent.includes(getString('QUOTE_TWEET'))) {
    return 'QUOTE_TWEET'
  }
  // Quoted tweets from accounts you blocked or muted are displayed as an
  // <article> with "This Tweet is unavailable."
  if ($tweet.querySelector('article')) {
    return 'UNAVAILABLE_QUOTE_TWEET'
  }
  return 'TWEET'
}

/**
 * @param {HTMLElement} $popup
 * @returns {boolean} false if there was nothing actionable in the popup
 */
function handlePopup($popup) {
  if (config.fastBlock) {
    if (blockMenuItemSeen && $popup.querySelector('[data-testid="confirmationSheetConfirm"]')) {
      log('fast blocking')
      ;/** @type {HTMLElement} */ ($popup.querySelector('[data-testid="confirmationSheetConfirm"]')).click()
      return true
    }
    else if ($popup.querySelector('[data-testid="block"]')) {
      log('preparing for fast blocking')
      blockMenuItemSeen = true
      // Create a nested observer for mobile, as it reuses the popup element
      return !mobile
    } else {
      blockMenuItemSeen = false
    }
  }

  if (config.addAddMutedWordMenuItem) {
    let $settingsLink = /** @type {HTMLElement} */ ($popup.querySelector('a[href="/settings"]'))
    if ($settingsLink) {
      addAddMutedWordMenuItem($settingsLink)
      return true
    }
  }

  return false
}

/**
 * Automatically click a tweet to get rid of the "More Tweets" section.
 */
async function hideMoreTweetsSection(path) {
  let id = URL_TWEET_ID_RE.exec(path)[1]
  let $link = await getElement(`a[href$="/status/${id}"]`, {
    name: 'tweet',
    stopIf: pathIsNot(path),
  })
  if ($link) {
    log('clicking "Show this thread" link')
    $link.click()
  }
}

/**
 * Checks if a tweet is preceded by an element creating a vertical reply line.
 * @param {HTMLElement} $tweet
 * @returns {boolean}
 */
function isReplyToPreviousTweet($tweet) {
  let $replyLine = $tweet.previousElementSibling?.firstElementChild?.firstElementChild?.firstElementChild
  if ($replyLine) {
    return getComputedStyle($replyLine).width == '2px'
  }
}

/**
 * @returns {MutationObserver | undefined}
 */
function onPopup($popup) {
  log('popup appeared', $popup)

  if (handlePopup($popup)) return

  log('observing nested popups')
  return observeElement($popup, (mutations) => {
    mutations.forEach((mutation) => {
      mutation.addedNodes.forEach((/** @type {HTMLElement} */ $nestedPopup) => {
        log('nested popup appeared', $nestedPopup)
        handlePopup($nestedPopup)
      })
    })
  })
}

function onTimelineChange($timeline, page) {
  log(`processing ${$timeline.children.length} timeline item${s($timeline.children.length)}`)

  /** @type {HTMLElement} */
  let $previousItem = null
  /** @type {?import("./types").TimelineItemType} */
  let previousItemType = null
  /** @type {?boolean} */
  let hidPreviousItem = null

  for (let $item of $timeline.children) {
    /** @type {?import("./types").TimelineItemType} */
    let itemType = null
    /** @type {?boolean} */
    let hideItem = null
    /** @type {?boolean} */
    let highlightItem = null
    /** @type {?HTMLElement} */
    let $tweet = $item.querySelector(Selectors.TWEET)

    if ($tweet != null) {
      itemType = getTweetType($tweet)
      // Only deal with retweets, quote tweets and algorithmic tweets on the
      // main timeline.
      if (isOnMainTimelinePage()) {
        if (isReplyToPreviousTweet($tweet) && hidPreviousItem != null) {
          hideItem = hidPreviousItem
          itemType = previousItemType
        } else {
          hideItem = shouldHideMainTimelineItem(itemType, page)
        }
      }
    }

    if (itemType == null && config.hideWhoToFollowEtc) {
      // "Who to follow", "Follow some Topics" etc. headings
      if ($item.querySelector(Selectors.TIMELINE_HEADING)) {
        itemType = 'HEADING'
        hideItem = true
        // Also hide the divider above the heading
        if ($previousItem?.innerText == '' && $previousItem.firstElementChild) {
          /** @type {HTMLElement} */ ($previousItem.firstElementChild).style.display = 'none'
        }
      }
    }

    if (itemType == null) {
      // Assume a non-identified item following an identified item is related.
      // "Who to follow" users and "Follow some Topics" topics appear in
      // subsequent items, as do "Show this thread" and "Show more" links.
      if (previousItemType != null) {
        hideItem = hidPreviousItem
        itemType = previousItemType
      }
      // The first item in the timeline is sometimes an empty placeholder <div>
      else if ($item !== $timeline.firstElementChild && hideItem == null) {
        // We're probably also missing some spacer / divider nodes
        log('unhandled timeline item', $item)
      }
    }

    if ($tweet?.querySelector(Selectors.VERIFIED_TICK)) {
      if (hideItem !== true) {
        hideItem = config.verifiedAccounts == 'hide'
      }
      highlightItem = config.verifiedAccounts == 'highlight'
    }

    if (hideItem != null) {
      if (/** @type {HTMLElement} */ ($item.firstElementChild).style.display != (hideItem ? 'none' : '')) {
        /** @type {HTMLElement} */ ($item.firstElementChild).style.display = hideItem ? 'none' : ''
        // Log these out as they can't be reliably triggered for testing
        if (itemType == 'HEADING' || previousItemType == 'HEADING') {
          log(`hid a ${previousItemType == 'HEADING' ? 'post-' : ''}heading item`, $item)
        }
      }
    }

    if (highlightItem != null) {
      if (/** @type {HTMLElement} */ ($item.firstElementChild).style.backgroundColor != (highlightItem ? 'rgba(29, 161, 242, 0.25)' : '')) {
        /** @type {HTMLElement} */ ($item.firstElementChild).style.backgroundColor = highlightItem ? 'rgba(29, 161, 242, 0.25)' : ''
      }
    }

    $previousItem = $item
    hidPreviousItem = hideItem
    // If we hid a heading, keep hiding everything after it until we hit a tweet
    if (!(previousItemType == 'HEADING' && itemType == null)) {
      previousItemType = itemType
    }
  }
}

function onTitleChange(title) {
  log('title changed', {title: title.split(ltr ? ' / ' : ' \\ ')[ltr ? 0 : 1], path: location.pathname})

  if (checkforDisabledHomeTimeline()) return

  // Ignore leading notification counts in titles, e.g. '(1) Latest Tweets'
  let notificationCount = ''
  if (TITLE_NOTIFICATION_RE.test(title)) {
    notificationCount = TITLE_NOTIFICATION_RE.exec(title)[0]
    title = title.replace(TITLE_NOTIFICATION_RE, '')
  }

  let homeNavigationWasUsed = homeNavigationIsBeingUsed
  homeNavigationIsBeingUsed = false

  if (title == getString('TWITTER')) {
    // Mobile uses "Twitter" when viewing a photo - we need to let these process
    // so the next page will be re-processed when the photo is closed.
    if (mobile && URL_PHOTO_RE.test(location.pathname)) {
      log('viewing a photo on mobile')
		}
    // Ignore Flash of Uninitialised Title when navigating to a page for the
    // first time.
    else {
      log('ignoring Flash of Uninitialised Title')
      return
    }
  }

  let newPage = title.split(ltr ? ' / ' : ' \\ ')[ltr ? 0 : 1]

  // Only allow the same page to re-process after a title change on desktop if
  // the "Customize your view" dialog is currently open.
  if (newPage == currentPage && !(desktop && location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW)) {
    log('ignoring duplicate title change')
    currentNotificationCount = notificationCount
    return
  }

  // On desktop, stay on the separated tweets timeline when…
  if (desktop && currentPage == separatedTweetsTimelineTitle &&
      // …the title has changed back to the main timeline…
      (newPage == getString('LATEST_TWEETS') || newPage == getString('HOME')) &&
      // …the Home nav link or Latest Tweets / Home header _wasn't_ clicked and…
      !homeNavigationWasUsed &&
      (
        // …the user viewed a photo.
        URL_PHOTO_RE.test(location.pathname) ||
        // …the user stopped viewing a photo.
        URL_PHOTO_RE.test(currentPath) ||
        // …the user opened or used the "Customize your view" dialog.
        location.pathname == PagePaths.CUSTOMIZE_YOUR_VIEW ||
        // …the user closed the "Customize your view" dialog.
        currentPath == PagePaths.CUSTOMIZE_YOUR_VIEW ||
        // …the user opened the "Send via Direct Message" dialog.
        location.pathname == PagePaths.COMPOSE_MESSAGE ||
        // …the user closed the "Send via Direct Message" dialog.
        currentPath == PagePaths.COMPOSE_MESSAGE ||
        // …the user opened the compose Tweet dialog.
        location.pathname == PagePaths.COMPOSE_TWEET ||
        // …the user closed the compose Tweet dialog.
        currentPath == PagePaths.COMPOSE_TWEET ||
        // …the notification count in the title changed.
        notificationCount != currentNotificationCount
      )) {
    log('ignoring title change on separated tweets timeline')
    currentNotificationCount = notificationCount
    currentPath = location.pathname
    setTitle(separatedTweetsTimelineTitle)
    return
  }

  // Restore display of the separated tweets timelne if it's the last one we
  // saw, and the user navigated back home without using the Home navigation
  // item.
  if (location.pathname == PagePaths.HOME &&
      currentPath != PagePaths.HOME &&
      !homeNavigationWasUsed &&
      lastMainTimelineTitle != null &&
      separatedTweetsTimelineTitle != null &&
      lastMainTimelineTitle == separatedTweetsTimelineTitle) {
    log('restoring display of the separated tweets timeline')
    currentNotificationCount = notificationCount
    currentPath = location.pathname
    setTitle(separatedTweetsTimelineTitle)
    return
  }

  // Assumption: all non-FOUT, non-duplicate title changes are navigation, which
  // need the page to be re-processed.

  currentPage = newPage
  currentNotificationCount = notificationCount
  currentPath = location.pathname

  if (isOnLatestTweetsTimeline() || isOnHomeTimeline()) {
    currentMainTimelineType = currentPage
  }
  if (isOnMainTimelinePage()) {
    lastMainTimelineTitle = currentPage
  }

  log('processing new page')

  processCurrentPage()
}

function processCurrentPage() {
  if (pageObservers.length > 0) {
    log(`disconnecting ${pageObservers.length} page observer${s(pageObservers.length)}`)
    pageObservers.forEach(observer => observer.disconnect())
    pageObservers = []
  }

  if (config.alwaysUseLatestTweets && currentPage == getString('HOME')) {
    switchToLatestTweets(currentPage)
    return
  }

  // Hooks for styling pages
  $body.classList.toggle('Explore', isOnExplorePage())
  $body.classList.toggle('HideAppNags', (
    mobile && config.hideAppNags && MOBILE_LOGGED_OUT_URLS.includes(currentPath))
  )
  $body.classList.toggle('HideSidebar', shouldHideSidebar())
  $body.classList.toggle('MainTimeline', isOnMainTimelinePage())
  $body.classList.toggle('Profile', isOnProfilePage())
  if (!isOnProfilePage()) {
    $body.classList.remove('Blocked', 'NoMedia')
  }
  $body.classList.toggle('QuoteTweets', isOnQuoteTweetsPage())
  $body.classList.toggle('Tweet', isOnIndividualTweetPage())

  // "Which version of the main timeline are we on?" hooks for styling
  $body.classList.toggle('Home', isOnHomeTimeline())
  $body.classList.toggle('LatestTweets', isOnLatestTweetsTimeline())
  $body.classList.toggle('SeparatedTweets', isOnSeparatedTweetsTimeline())

  if (isOnMainTimelinePage()) {
    if (config.retweets == 'separate' || config.quoteTweets == 'separate') {
      addSeparatedTweetsTimelineControl(currentPage)
    } else if (mobile) {
      removeMobileTimelineHeaderElements()
    }
    observeTimeline(currentPage)
  } else if (mobile) {
    removeMobileTimelineHeaderElements()
  }

  if (isOnProfilePage()) {
    observeTimeline(currentPage)
    if (desktop && config.hideSidebarContent) {
      tweakProfilePage(currentPage)
    }
  }

  if (isOnIndividualTweetPage()) {
    tweakIndividualTweetPage()
  }

  if (config.tweakQuoteTweetsPage && isOnQuoteTweetsPage()) {
    tweakQuoteTweetsPage()
  }

  if (mobile && config.hideExplorePageContents && isOnExplorePage()) {
    tweakExplorePage(currentPage)
  }
}

/**
 * The mobile version of Twitter reuses heading elements between screens, so we
 * always remove any elements which could be there from the previous page and
 * re-add them later when needed.
 */
function removeMobileTimelineHeaderElements() {
  if (mobile) {
    document.querySelector('#tnt_shared_tweets_timeline_title')?.remove()
    document.querySelector('#tnt_switch_timeline')?.remove()
  }
}

/**
 * Sets the page name in <title>, retaining any current notification count.
 * @param {string} page
 */
function setTitle(page) {
  document.title = ltr ? (
    `${currentNotificationCount}${page} / ${getString('TWITTER')}`
  ) : (
    `${currentNotificationCount}${getString('TWITTER')} \\ ${page}`
  )
}

/**
 * @param {import("./types").AlgorithmicTweetsConfig} config
 * @param {string} page
 * @returns {boolean}
 */
function shouldHideAlgorithmicTweet(config, page) {
  switch (config) {
    case 'hide': return true
    case 'ignore': return page == separatedTweetsTimelineTitle
  }
}

/**
 * @param {import("./types").TimelineItemType} type
 * @param {string} page
 * @returns {boolean}
 */
function shouldHideMainTimelineItem(type, page) {
  switch (type) {
    case 'LIKED':
      return shouldHideAlgorithmicTweet(config.likedTweets, page)
    case 'QUOTE_TWEET':
      return shouldHideSharedTweet(config.quoteTweets, page)
    case 'REPLIED':
      return shouldHideAlgorithmicTweet(config.repliedToTweets, page)
    case 'RETWEET':
      return shouldHideSharedTweet(config.retweets, page)
    case 'SUGGESTED_TOPIC_TWEET':
      return shouldHideAlgorithmicTweet(config.suggestedTopicTweets, page)
    case 'TWEET':
      return page == separatedTweetsTimelineTitle
    case 'UNAVAILABLE_QUOTE_TWEET':
      return config.hideUnavailableQuoteTweets || shouldHideSharedTweet(config.quoteTweets, page)
    case 'UNAVAILABLE_RETWEET':
      return config.hideUnavailableQuoteTweets || shouldHideSharedTweet(config.retweets, page)
    default:
      return true
  }
}

/**
 * @param {import("./types").SharedTweetsConfig} config
 * @param {string} page
 * @returns {boolean}
 */
function shouldHideSharedTweet(config, page) {
  switch (config) {
    case 'hide': return true
    case 'ignore': return page == separatedTweetsTimelineTitle
    case 'separate': return page != separatedTweetsTimelineTitle
  }
}

async function switchToLatestTweets(page) {
  log('switching to Latest Tweets timeline')

  let contextSelector = mobile ? 'header div:nth-of-type(3)' : Selectors.PRIMARY_COLUMN
  let $switchButton = await getElement(`${contextSelector} [role="button"]`, {
    name: 'sparkle button',
    stopIf: pageIsNot(page),
  })
  if ($switchButton == null) return

  log('clicking sparkle button')
  $switchButton.click()

  let $seeLatestTweetsInstead = await getElement('div[role="menu"] div[role="menuitem"]', {
    name: '"See latest Tweets instead" menu item',
    stopIf: pageIsNot(page),
  })
  if ($seeLatestTweetsInstead == null) return

  log('clicking "See latest Tweets" instead menu item')
  $seeLatestTweetsInstead.click()
}

async function tweakExplorePage(page) {
  let $searchInput = await getElement('input[data-testid="SearchBox_Search_Input"]', {
    name: 'search input',
    stopIf: pageIsNot(page),
  })
  if (!$searchInput) return

  log('focusing search input')
  $searchInput.focus()

  let $backButton = await getElement('[role="button"]:not([data-testid="DashButton_ProfileIcon_Link"])', {
    context: $searchInput.closest('header'),
    name: 'back button',
    stopIf: pageIsNot(page),
  })
  if (!$backButton) return

  // The back button appears after the search input is focused. When you tap it
  // or go back manually, it's replaced with the slide-out menu button and the
  // Explore page contents are shown - we want to skip that.
  pageObservers.push(
    observeElement($backButton.parentElement, (mutations) => {
      mutations.forEach((mutation) => {
        mutation.addedNodes.forEach((/** @type {HTMLElement} */ $el) => {
          if ($el.querySelector('[data-testid="DashButton_ProfileIcon_Link"]')) {
            log('slide-out menu button appeared, going back to skip Explore page')
            history.go(-2)
          }
        })
      })
    })
  )
}

async function tweakIndividualTweetPage() {
  if (config.hideMoreTweets) {
    let searchParams = new URLSearchParams(location.search)
    if (searchParams.has('ref_src') || searchParams.has('s')) {
      hideMoreTweetsSection(currentPath)
    }
  }
}

function tweakProfilePage(currentPage) {
  observeProfileBlockedStatus(currentPage)
  observeProfileSidebar(currentPage)
}

async function tweakQuoteTweetsPage() {
  if (desktop) {
    // Show the quoted tweet once in the pinned header instead
    let [$heading, $quotedTweet] = await Promise.all([
      getElement(`${Selectors.PRIMARY_COLUMN} ${Selectors.TIMELINE_HEADING}`, {
        name: 'Quote Tweets heading',
        stopIf: not(isOnQuoteTweetsPage)
      }),
      getElement('[data-testid="tweet"] [aria-labelledby] > div:last-child', {
        name: 'first quoted tweet',
        stopIf: not(isOnQuoteTweetsPage)
      })
    ])

    if ($heading != null && $quotedTweet != null) {
      if (document.querySelector('#tnt_pinned_quoted_tweet')) {
        log('pinned quoted tweet already present')
        return
      }

      log('pinning quoted tweet in the Quote Tweets header')
      do {
        $heading = $heading.parentElement
      } while (!$heading.nextElementSibling)

      let $clone = /** @type {HTMLElement} */ ($quotedTweet.cloneNode(true))
      $clone.id = 'tnt_pinned_quoted_tweet'
      $clone.style.margin = '0 16px 9px 16px'
      // Media doesn't work when we clone it, so just remove it to save space
      let $media = $clone.querySelector('div[role="link"] > div > div:nth-of-type(3)')
      $media?.remove()
      // Clicking on the clone doesn't work either, so click a real quoted tweet
      $clone.addEventListener('click', () => {
        /** @type {HTMLElement} */ (
          document.querySelector('[data-testid="tweet"] [aria-labelledby] > div:last-child [role="link"]')
        )?.click()
      })
      $heading.insertAdjacentElement('afterend', $clone)
    }
  }
}
//#endregion

//#region Main
function main() {
  log({config, lang, platform: mobile ? 'mobile' : 'desktop'})

  configureSeparatedTweetsTimelineTitle()
  configureCss()
  checkReactNativeStylesheet()
  observeFontSize()
  observeBackgroundColor()
  observeColor()
  observePopups()

  observeTitle()
}

function configChanged(changes) {
  log('config changed', changes)

  configureCss()
  configureFont()
  configureThemeCss()
  observeFontSize()
  observePopups()

  // Only re-process the current page if navigation wasn't already triggered
  // while applying the following config changes (if there were any).
  let navigationTriggered = (
    configureSeparatedTweetsTimelineTitle() ||
    checkforDisabledHomeTimeline()
  )
  if (!navigationTriggered) {
    processCurrentPage()
  }
}

if (typeof GM == 'undefined' &&
    typeof chrome != 'undefined' &&
    typeof chrome.storage != 'undefined') {
  chrome.storage.local.get((storedConfig) => {
    Object.assign(config, storedConfig)
    main()
  })

  chrome.storage.onChanged.addListener((changes) => {
    let configChanges = Object.fromEntries(
      Object.entries(changes).map(([key, {newValue}]) => [key, newValue])
    )
    Object.assign(config, configChanges)
    configChanged(configChanges)
  })
}
else {
  main()
}
//#endregion