☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

目前为 2024-06-13 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5. //
  6. // @include     *
  7. // @run-at      document-start
  8. //
  9. // @grant       GM_addElement
  10. // @grant       GM_download
  11. // @grant       GM_getValue
  12. // @grant       GM_getValues
  13. // @grant       GM_openInTab
  14. // @grant       GM_registerMenuCommand
  15. // @grant       GM_unregisterMenuCommand
  16. // @grant       GM_setClipboard
  17. // @grant       GM_setValue
  18. // @grant       GM_xmlhttpRequest
  19. //
  20. // @grant       GM.getValue
  21. // @grant       GM.openInTab
  22. // @grant       GM.registerMenuCommand
  23. // @grant       GM.unregisterMenuCommand
  24. // @grant       GM.setClipboard
  25. // @grant       GM.setValue
  26. // @grant       GM.xmlHttpRequest
  27. //
  28. // @version     1.3.9
  29. // @author      tophf
  30. //
  31. // @original-version 2017.9.29
  32. // @original-author  kuehlschrank
  33. //
  34. // @connect     *
  35. // CSP check:
  36. // @connect     self
  37. // rule installer in config dialog:
  38. // @connect     github.com
  39. // big/trusted hostings for the built-in rules with "q":
  40. // @connect     deviantart.com
  41. // @connect     facebook.com
  42. // @connect     fbcdn.com
  43. // @connect     flickr.com
  44. // @connect     gfycat.com
  45. // @connect     googleusercontent.com
  46. // @connect     gyazo.com
  47. // @connect     imgur.com
  48. // @connect     instagr.am
  49. // @connect     instagram.com
  50. // @connect     prnt.sc
  51. // @connect     prntscr.com
  52. // @connect     user-images.githubusercontent.com
  53. //
  54. // @supportURL  https://github.com/tophf/mpiv/issues
  55. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  56. // ==/UserScript==
  57.  
  58. 'use strict';
  59.  
  60. //#region Globals
  61.  
  62. /** @type mpiv.Config */
  63. let cfg;
  64. /** @type mpiv.AppInfo */
  65. let ai = {rule: {}};
  66. /** @type Element */
  67. let elSetup;
  68. let nonce;
  69.  
  70. const doc = document;
  71. const hostname = location.hostname;
  72. const dotDomain = '.' + hostname;
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75. const {from: arrayFrom, isArray} = Array;
  76.  
  77. const PREFIX = 'mpiv-';
  78. const NOAA_ATTR = 'data-no-aa';
  79. const STATUS_ATTR = `${PREFIX}status`;
  80. const MSG = Object.assign({}, ...[
  81.   'getViewSize',
  82.   'viewSize',
  83. ].map(k => ({[k]: `${PREFIX}${k}`})));
  84. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  85. // time for volatile things to settle down meanwhile we postpone action
  86. // examples: loading image from cache, quickly moving mouse over one element to another
  87. const SETTLE_TIME = 50;
  88. // used to detect JS code in host rules
  89. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  90. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  91. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  92. const BLANK_PIXEL = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
  93. const ZOOM_MAX = 16;
  94. const SYM_U = Symbol('u');
  95. const FN_ARGS = {
  96.   s: ['m', 'node', 'rule'],
  97.   c: ['text', 'doc', 'node', 'rule'],
  98.   q: ['text', 'doc', 'node', 'rule'],
  99.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  100. };
  101. let trustedHTML, trustedScript;
  102. //#endregion
  103. //#region GM4 polyfill
  104.  
  105. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  106.   this.GM = {__proto__: null, info: GM_info};
  107. if (!GM.getValue)
  108.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  109. if (!GM.setValue)
  110.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  111. if (!GM.openInTab)
  112.   GM.openInTab = GM_openInTab;
  113. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  114.   GM.registerMenuCommand = GM_registerMenuCommand;
  115. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  116.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  117. if (!GM.setClipboard)
  118.   GM.setClipboard = GM_setClipboard;
  119. if (!GM.xmlHttpRequest)
  120.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  121.  
  122. //#endregion
  123.  
  124. const App = {
  125.  
  126.   isEnabled: true,
  127.   isImageTab: false,
  128.   globalStyle: '',
  129.   popupStyleBase: '',
  130.   tabfix: /\.(dumpoir|greatfon|picuki)\.com$/.test(dotDomain),
  131.   NOP: /\.(facebook|instagram|chrome|google)\.com$/.test(dotDomain) &&
  132.     (() => {}),
  133.  
  134.   activate(info, event) {
  135.     const {match, node, rule, url} = info;
  136.     const auto = cfg.start === 'auto';
  137.     const vidCtrl = cfg.videoCtrl && isVideo(node);
  138.     if (elSetup) console.info({node, rule, url, match});
  139.     if (auto && vidCtrl && !Events.ctrl)
  140.       return;
  141.     if (ai.node) App.deactivate();
  142.     ai = info;
  143.     ai.force = Events.ctrl;
  144.     ai.gNum = 0;
  145.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  146.     Util.suppressTooltip();
  147.     Calc.updateViewSize();
  148.     Events.ctrl = false;
  149.     Events.toggle(true);
  150.     Events.trackMouse(event);
  151.     if (ai.force && (auto || cfg.start === 'ctrl' || cfg.start === 'context')) {
  152.       App.start();
  153.     } else if ((auto || cfg.preload) && !vidCtrl && !rule.manual) {
  154.       App.belate(auto);
  155.     } else {
  156.       Status.set('ready');
  157.     }
  158.   },
  159.  
  160.   belate(auto) {
  161.     if (cfg.preload) {
  162.       ai.preloadStart = auto ? now() : -1;
  163.       App.start();
  164.       Status.set('+preloading');
  165.     } else {
  166.       ai.timer = setTimeout(App.start, cfg.delay);
  167.     }
  168.   },
  169.  
  170.   checkProgress({start} = {}) {
  171.     const p = ai.popup;
  172.     if (!p)
  173.       return;
  174.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  175.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  176.     if (h)
  177.       return App.canCommit(w, h);
  178.     if (start) {
  179.       clearInterval(ai.timerProgress);
  180.       ai.timerProgress = setInterval(App.checkProgress, 150);
  181.     }
  182.   },
  183.  
  184.   canClose: (p = ai.popup) => !p || (
  185.     isVideo(p)
  186.       ? !cfg.keepVids
  187.       : document.fullscreenElement !== p
  188.   ),
  189.  
  190.   canCommit(w, h) {
  191.     if (!ai.force && ai.rect && !ai.gItems &&
  192.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  193.       App.deactivate();
  194.       return false;
  195.     }
  196.     App.stopTimers();
  197.     let wait = ai.preloadStart;
  198.     if (wait < 0 && !ai.force || !ai.popup)
  199.       return;
  200.     if (wait > 0 && (wait += cfg.delay - now()) > 0) {
  201.       ai.timer = setTimeout(App.checkProgress, wait);
  202.     } else if ((!w || !h) && (ai.urls || []).length) {
  203.       App.handleError({type: 'error'});
  204.     } else {
  205.       App.commit();
  206.     }
  207.     return true;
  208.   },
  209.  
  210.   async commit() {
  211.     const p = ai.popupShown = ai.popup;
  212.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  213.     if (isDecoded) {
  214.       await p.decode();
  215.       if (p !== ai.popup)
  216.         return;
  217.     }
  218.     Status.set('-preloading');
  219.     App.updateStyles();
  220.     Calc.measurePopup();
  221.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  222.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  223.     if (willMove)
  224.       Popup.move();
  225.     Bar.updateName();
  226.     Bar.updateDetails();
  227.     Status.set(!ai.popupLoaded && 'loading');
  228.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  229.                ai.nheight > p.clientHeight + ai.extras.h;
  230.     if (ai.large) {
  231.       Status.set('+large');
  232.       // prevent a blank bg+border in FF
  233.       if (isFF && p.complete && !isDecoded)
  234.         p.style.backgroundImage = `url('${p.src}')`;
  235.     }
  236.     if (ai.preloadStart < 0 && isFunction(p.play))
  237.       p.play().catch(now);
  238.   },
  239.  
  240.   deactivate({wait} = {}) {
  241.     App.stopTimers(true);
  242.     if (ai.req)
  243.       tryCatch(ai.req.abort);
  244.     if (ai.tooltip)
  245.       ai.tooltip.node.title = ai.tooltip.text;
  246.     Status.set(false);
  247.     Bar.set(false);
  248.     Events.toggle(false);
  249.     Popup.destroy();
  250.     if (wait) {
  251.       App.isEnabled = false;
  252.       setTimeout(App.enable, 200);
  253.     }
  254.     ai = {rule: {}};
  255.   },
  256.  
  257.   enable() {
  258.     App.isEnabled = true;
  259.   },
  260.  
  261.   handleError(e, rule = ai.rule) {
  262.     if (rule && rule.onerror === 'skip')
  263.       return;
  264.     if (ai.imageUrl &&
  265.         !ai.xhr &&
  266.         !ai.imageUrl.startsWith(location.origin + '/') &&
  267.         location.protocol === 'https:' &&
  268.         CspSniffer.init) {
  269.       Popup.create(ai.imageUrl, ai.pageUrl, e);
  270.       return;
  271.     }
  272.     const fe = Util.formatError(e, rule);
  273.     if (!rule || !ai.urls || !ai.urls.length)
  274.       console.warn(...fe);
  275.     if (ai.urls && ai.urls.length) {
  276.       ai.url = ai.urls.shift();
  277.       if (ai.url) {
  278.         App.stopTimers();
  279.         App.startSingle();
  280.       } else {
  281.         App.deactivate();
  282.       }
  283.     } else if (ai.node) {
  284.       Status.set('error');
  285.       Bar.set(fe.message, 'error');
  286.     }
  287.   },
  288.  
  289.   /** @param {MessageEvent} e */
  290.   onMessage(e) {
  291.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  292.       e.stopImmediatePropagation();
  293.       for (const el of doc.getElementsByTagName('iframe')) {
  294.         if (el.contentWindow === e.source) {
  295.           const s = Calc.frameSize(el, window).join(':');
  296.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  297.           return;
  298.         }
  299.       }
  300.     }
  301.   },
  302.  
  303.   /** @param {MessageEvent} e */
  304.   onMessageChild(e) {
  305.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  306.       e.stopImmediatePropagation();
  307.       removeEventListener('message', App.onMessageChild, true);
  308.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  309.       if (w && h) ai.view = {w, h, x, y};
  310.     }
  311.   },
  312.  
  313.   start() {
  314.     App.updateStyles();
  315.     if (ai.gallery)
  316.       App.startGallery();
  317.     else
  318.       App.startSingle();
  319.   },
  320.  
  321.   startSingle() {
  322.     Status.loading();
  323.     if (ai.force && ai.preloadStart < 0) {
  324.       App.commit();
  325.       return;
  326.     }
  327.     ai.imageUrl = null;
  328.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  329.       Req.findRedirect();
  330.     } else if (ai.rule.q && !isArray(ai.urls)) {
  331.       App.startFromQ();
  332.     } else {
  333.       Popup.create(ai.url);
  334.       Ruler.runC();
  335.     }
  336.   },
  337.  
  338.   async startFromQ() {
  339.     try {
  340.       const {responseText, doc, finalUrl} = await Req.getDoc(ai.url);
  341.       const url = Ruler.runQ(responseText, doc, finalUrl);
  342.       if (!url)
  343.         throw 'The "q" rule did not produce any URL.';
  344.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  345.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  346.         if (!info || !info.url)
  347.           throw `Couldn't follow URL: ${url}`;
  348.         Object.assign(ai, info);
  349.         App.startSingle();
  350.       } else {
  351.         Popup.create(url, finalUrl);
  352.         Ruler.runC(responseText, doc);
  353.       }
  354.     } catch (e) {
  355.       App.handleError(e);
  356.     }
  357.   },
  358.  
  359.   async startGallery() {
  360.     Status.loading();
  361.     try {
  362.       const startUrl = ai.url;
  363.       const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
  364.       const items = await new Promise(cb => {
  365.         const res = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node, cb);
  366.         if (res !== undefined) cb(res);
  367.       });
  368.       // bail out if the gallery's async callback took too long
  369.       if (ai.url !== startUrl) return;
  370.       ai.gNum = items.length;
  371.       ai.gItems = items.length && items;
  372.       if (ai.gItems) {
  373.         const i = items.index;
  374.         ai.gIndex = i >= 0 && items[i] ? +i :
  375.           Gallery.findIndex(typeof i === 'string' ? i : ai.url);
  376.         setTimeout(Gallery.next);
  377.       } else {
  378.         throw 'Empty gallery';
  379.       }
  380.     } catch (e) {
  381.       App.handleError(e);
  382.     }
  383.   },
  384.  
  385.   stopTimers(bar) {
  386.     for (const timer of ['timer', 'timerStatus', bar && 'timerBar'])
  387.       clearTimeout(ai[timer]);
  388.     clearInterval(ai.timerProgress);
  389.   },
  390.  
  391.   toggleZoom({keepScale} = {}) {
  392.     const p = ai.popup;
  393.     if (!p || !ai.scales || ai.scales.length < 2)
  394.       return;
  395.     ai.zoomed = !ai.zoomed;
  396.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  397.     if (ai.zooming)
  398.       p.classList.add(`${PREFIX}zooming`);
  399.     Popup.move();
  400.     Bar.updateDetails();
  401.     Status.set(ai.zoomed ? 'zoom' : false);
  402.     return ai.zoomed;
  403.   },
  404.  
  405.   updateStyles() {
  406.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  407.     Util.addStyle('rule', ai.rule.css || '');
  408.   },
  409. };
  410.  
  411. const Bar = {
  412.  
  413.   set(label, cls, prefix) {
  414.     let b = ai.bar;
  415.     if (typeof label !== 'string') {
  416.       $remove(b);
  417.       ai.bar = null;
  418.       return;
  419.     }
  420.     const force = !b && 0;
  421.     if (!b) b = ai.bar = $new('div', {id: `${PREFIX}bar`, className: `${PREFIX}${cls}`});
  422.     ai.barText = label;
  423.     App.updateStyles();
  424.     Bar.updateDetails();
  425.     Bar.setText(cfg.uiInfoCaption || cls === 'error' || cls === 'xhr' ? label : '');
  426.     $dataset(b, 'prefix', prefix);
  427.     setTimeout(Bar.show, 0, force);
  428.     if (!b.parentNode) {
  429.       doc.body.appendChild(b);
  430.       Util.forceLayout(b);
  431.     }
  432.   },
  433.  
  434.   setText(text) {
  435.     if (/<([a-z][-a-z]*)[^<>]*>[^<>]*<\/\1\s*>/i.test(text)) { // checking for <tag...>...</tag>
  436.       ai.bar.innerHTML = trustedHTML ? trustedHTML(text) : text;
  437.     } else {
  438.       ai.bar.textContent = text;
  439.     }
  440.   },
  441.  
  442.   show(force) {
  443.     const b = ai.bar;
  444.     if (!force && (!cfg.uiInfo || force !== 0 && cfg.uiInfoOnce) || ai.barShown)
  445.       return;
  446.     clearTimeout(ai.timerBar);
  447.     b.classList.add(PREFIX + 'show');
  448.     $dataset(b, 'force', force === 2 ? '' : null);
  449.     ai.timerBar = !force && setTimeout(Bar.hide, cfg.uiInfoHide * 1000);
  450.     ai.barShown = true;
  451.   },
  452.  
  453.   hide(force) {
  454.     const b = ai.bar;
  455.     if (!b || !force && (!cfg.uiInfo || b.dataset.force) || !ai.barShown)
  456.       return;
  457.     $dataset(b, 'force', force === 2 ? '' : null);
  458.     b.classList.remove(PREFIX + 'show');
  459.     ai.barShown = false;
  460.   },
  461.  
  462.   updateName() {
  463.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  464.     if (gi) {
  465.       const item = gi[i];
  466.       const noDesc = !gi.some(_ => _.desc);
  467.       const c = [
  468.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  469.         item.desc,
  470.       ].filter(Boolean).join(' - ');
  471.       Bar.set(c.trim() || ' ', 'gallery', n > 1 ? `${i + 1}/${n}` : null);
  472.     } else if ('caption' in ai) {
  473.       Bar.set(ai.caption, 'caption');
  474.     } else if (ai.tooltip) {
  475.       Bar.set(ai.tooltip.text, 'tooltip');
  476.     } else {
  477.       Bar.set(' ', 'info');
  478.     }
  479.   },
  480.  
  481.   updateDetails() {
  482.     if (!ai.bar) return;
  483.     const r = ai.rotate;
  484.     const zoom = ai.nwidth && `${
  485.       Math.round(ai.scale * 100)
  486.     }%${
  487.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  488.     }${
  489.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  490.     }, ${
  491.       ai.nwidth
  492.     } x ${
  493.       ai.nheight
  494.     } px, ${
  495.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  496.     } MP, ${
  497.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  498.     }`.replace(/\x20/g, '\xA0');
  499.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  500.       $dataset(ai.bar, 'zoom', zoom || null);
  501.       Bar.show();
  502.     }
  503.   },
  504. };
  505.  
  506. const Calc = {
  507.  
  508.   aspectRatio(w, h) {
  509.     for (let rat = w / h, a, b = 0; ;) {
  510.       b++;
  511.       a = Math.round(w * b / h);
  512.       if (a > 10 && b > 10 || a > 100 || b > 100)
  513.         return rat.toFixed(2);
  514.       if (Math.abs(a / b - rat) < .01)
  515.         return `${a}:${b}`;
  516.     }
  517.   },
  518.  
  519.   frameSize(elFrame, wnd) {
  520.     if (!elFrame) return;
  521.     const r = elFrame.getBoundingClientRect();
  522.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  523.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  524.     const x = r.left < 0 ? -r.left : 0;
  525.     const y = r.top < 0 ? -r.top : 0;
  526.     return [w, h, x, y];
  527.   },
  528.  
  529.   generateScales(fit) {
  530.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  531.     const zoomStep = cfg.zoomStep / 100;
  532.     const arr = [scale];
  533.     if (fit !== 1) {
  534.       const diff = goal / scale;
  535.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  536.       const step = steps && Math.pow(diff, 1 / steps);
  537.       for (let i = steps; --i > 0;)
  538.         arr.push((scale *= step));
  539.       arr.push(scale = goal);
  540.     }
  541.     while ((scale *= zoomStep) <= ZOOM_MAX)
  542.       arr.push(scale);
  543.     return arr;
  544.   },
  545.  
  546.   measurePopup() {
  547.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  548.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  549.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  550.     if (p.clientWidth > nw) {
  551.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  552.       nh = ai.nheight = w / nw * nh | 0;
  553.       nw = ai.nwidth = w;
  554.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  555.     }
  556.     p.classList.add(`${PREFIX}show`);
  557.     p.removeAttribute('style');
  558.     const s = getComputedStyle(p);
  559.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  560.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  561.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  562.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  563.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  564.     ai.extras = {
  565.       inw, inh,
  566.       outw, outh,
  567.       o: o2 / 2,
  568.       w: inw + outw,
  569.       h: inh + outh,
  570.     };
  571.     const fit = Math.min(
  572.       (ai.view.w - ai.extras.w) / ai.nwidth,
  573.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  574.     const isCustom = !cfg.fit && cfg.scales.length;
  575.     let cutoff = Math.min(1, fit);
  576.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  577.     if (isCustom) {
  578.       const dst = [];
  579.       for (const scale of cfg.scales) {
  580.         const val = parseFloat(scale) || fit;
  581.         dst.push(val);
  582.         if (isCustom && typeof scale === 'string') {
  583.           if (scale.includes('!')) cutoff = val;
  584.           if (scale.includes('*')) scaleZoom = val;
  585.         }
  586.       }
  587.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  588.     } else {
  589.       ai.scales = Calc.generateScales(fit);
  590.     }
  591.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  592.     ai.scaleFit = fit;
  593.     ai.scaleZoom = scaleZoom;
  594.   },
  595.  
  596.   rect() {
  597.     const {node, rule} = ai;
  598.     let n = rule.rect && node.closest(rule.rect);
  599.     if (n) return n.getBoundingClientRect();
  600.     const nested = (n = node).firstElementChild ? document.elementsFromPoint(ai.cx, ai.cy) : [];
  601.     let maxArea = 0;
  602.     let maxBounds;
  603.     let i = 0;
  604.     do {
  605.       const bounds = n.getBoundingClientRect();
  606.       const area = bounds.width * bounds.height;
  607.       if (area > maxArea) {
  608.         maxArea = area;
  609.         maxBounds = bounds;
  610.       }
  611.     } while ((n = nested[i++]) && node.contains(n));
  612.     return maxBounds;
  613.   },
  614.  
  615.   scaleBiggerThan(scale, i, arr) {
  616.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  617.   },
  618.  
  619.   scaleIndex(dir) {
  620.     const i = ai.scales.indexOf(ai.scale);
  621.     if (i >= 0) return i + dir;
  622.     for (
  623.       let len = ai.scales.length,
  624.         i = dir > 0 ? 0 : len - 1;
  625.       i >= 0 && i < len;
  626.       i += dir
  627.     ) {
  628.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  629.         return i;
  630.     }
  631.     return -1;
  632.   },
  633.  
  634.   scaleForFirstZoom(keepScale) {
  635.     const z = ai.scaleZoom;
  636.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  637.   },
  638.  
  639.   updateViewSize() {
  640.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  641.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  642.     if (window === top) return;
  643.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  644.     if (w && h) {
  645.       ai.view = {w, h, x: 0, y: 0};
  646.     } else {
  647.       addEventListener('message', App.onMessageChild, true);
  648.       parent.postMessage(MSG.getViewSize, '*');
  649.     }
  650.   },
  651. };
  652.  
  653. class Config {
  654.  
  655.   constructor({data: c, save}) {
  656.     if (typeof c === 'string')
  657.       c = tryJSON(c);
  658.     if (typeof c !== 'object' || !c)
  659.       c = {};
  660.     const {DEFAULTS} = Config;
  661.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  662.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  663.         '';
  664.     if (c.version !== DEFAULTS.version) {
  665.       if (typeof c.hosts === 'string')
  666.         c.hosts = c.hosts.split('\n')
  667.           .map(s => tryJSON(s) || s)
  668.           .filter(Boolean);
  669.       if (c.close === true || c.close === false)
  670.         c.zoomOut = c.close ? 'auto' : 'stay';
  671.       for (const key in DEFAULTS)
  672.         if (typeof c[key] !== typeof DEFAULTS[key])
  673.           c[key] = DEFAULTS[key];
  674.       if (c.version === 3 && c.scales[0] === 0)
  675.         c.scales[0] = '0!';
  676.       for (const key in c)
  677.         if (!(key in DEFAULTS))
  678.           delete c[key];
  679.       c.version = DEFAULTS.version;
  680.       if (save)
  681.         GM.setValue('cfg', c);
  682.     }
  683.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  684.       App.globalStyle = '';
  685.     if (!isArray(c.scales))
  686.       c.scales = [];
  687.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  688.     Object.assign(this, DEFAULTS, c);
  689.   }
  690.  
  691.   static async load(opts) {
  692.     opts.data = await GM.getValue('cfg');
  693.     return new Config(opts);
  694.   }
  695.  
  696.   _getCss() {
  697.     const {css} = this;
  698.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  699.   }
  700. }
  701.  
  702. Config.DEFAULTS = /** @type mpiv.Config */ {
  703.   __proto__: null,
  704.   center: false,
  705.   css: '',
  706.   delay: 500,
  707.   fit: '',
  708.   globalStatus: false,
  709.   // prefer ' inside rules because " will be displayed as \"
  710.   // example: "img[src*='icon']"
  711.   hosts: [{
  712.     name: 'No popup for YouTube thumbnails',
  713.     d: 'www.youtube.com',
  714.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  715.     s: '',
  716.   }, {
  717.     name: 'No popup for SVG/PNG icons',
  718.     d: '',
  719.     e: "img[src*='icon']",
  720.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  721.     s: '',
  722.   }],
  723.   imgtab: false,
  724.   keepOnBlur: false,
  725.   keepVids: false,
  726.   mute: false,
  727.   night: false,
  728.   preload: false,
  729.   scale: 1.05,
  730.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  731.   start: 'auto',
  732.   startAlt: 'context',
  733.   startAltShown: false,
  734.   uiBackgroundColor: '#ffffff',
  735.   uiBackgroundOpacity: 100,
  736.   uiBorderColor: '#000000',
  737.   uiBorderOpacity: 100,
  738.   uiBorder: 0,
  739.   uiFadein: true,
  740.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  741.   uiInfo: true,
  742.   uiInfoCaption: true,
  743.   uiInfoHide: 3,
  744.   uiInfoOnce: true,
  745.   uiShadowColor: '#000000',
  746.   uiShadowOpacity: 80,
  747.   uiShadow: 20,
  748.   uiPadding: 0,
  749.   uiMargin: 0,
  750.   version: 6,
  751.   videoCtrl: true,
  752.   waitLoad: false,
  753.   xhr: true,
  754.   zoom: 'context',
  755.   zoomOut: 'auto',
  756.   zoomStep: 133,
  757. };
  758.  
  759. const CspSniffer = {
  760.  
  761.   /** @type {?Object<string,string[]>} */
  762.   csp: null,
  763.   selfUrl: location.origin + '/',
  764.  
  765.   // will be null when done
  766.   init() {
  767.     this.busy = new Promise(resolve => {
  768.       const xhr = new XMLHttpRequest();
  769.       xhr.open('get', location);
  770.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  771.       xhr.onreadystatechange = () => {
  772.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  773.           this.csp = this._parse([
  774.             xhr.getResponseHeader('content-security-policy'),
  775.             $prop('meta[http-equiv="Content-Security-Policy"]', 'content'),
  776.           ].filter(Boolean).join(','));
  777.           this.init = this.busy = xhr.onreadystatechange = null;
  778.           xhr.abort();
  779.           resolve();
  780.         }
  781.       };
  782.       xhr.send();
  783.     });
  784.   },
  785.  
  786.   async check(url, allowInit) {
  787.     if (allowInit && this.init) this.init();
  788.     if (this.busy) await this.busy;
  789.     const isVideo = Util.isVideoUrl(url);
  790.     let mode;
  791.     if (this.csp) {
  792.       const src = this.csp[isVideo ? 'media' : 'img'];
  793.       if (!src.some(this._srcMatches, url))
  794.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  795.     }
  796.     return [mode || ai.xhr, isVideo];
  797.   },
  798.  
  799.   _parse(csp) {
  800.     if (!csp) return;
  801.     const src = {};
  802.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  803.     for (let m; (m = rx.exec(csp));)
  804.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  805.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  806.       nonce = RegExp.$1;
  807.     if ((src.trusted || []).includes("'script'"))
  808.       App.NOP = () => {};
  809.     if (!src.img) src.img = src.default || [];
  810.     if (!src.media) src.media = src.default || [];
  811.     for (const set of [src.img, src.media]) {
  812.       set.forEach((item, i) => {
  813.         if (item !== '*' && item.includes('*')) {
  814.           set[i] = new RegExp(
  815.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  816.             item
  817.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  818.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  819.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  820.             .replace(/[^/]$/, '$&/'));
  821.         }
  822.       });
  823.     }
  824.     return src;
  825.   },
  826.  
  827.   /** @this string */
  828.   _srcMatches(src) {
  829.     return src instanceof RegExp ? src.test(this) :
  830.       src === '*' ||
  831.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  832.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  833.   },
  834. };
  835.  
  836. const Events = {
  837.  
  838.   ctrl: false,
  839.   hoverData: null,
  840.   hoverTimer: 0,
  841.   ignoreKeyHeld: false,
  842.  
  843.   onMouseOver(e) {
  844.     let node = e.target;
  845.     Events.ignoreKeyHeld = e.shiftKey;
  846.     if (!App.isEnabled ||
  847.         e.shiftKey ||
  848.         ai.zoomed ||
  849.         node === ai.popup ||
  850.         node === doc.body ||
  851.         node === doc.documentElement ||
  852.         node === elSetup ||
  853.         ai.gallery && ai.rectHovered ||
  854.         !App.canClose())
  855.       return;
  856.     if (node.shadowRoot)
  857.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  858.     // we don't want to process everything in the path of a quickly moving mouse cursor
  859.     Events.hoverData = {e, node, start: now()};
  860.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  861.     node.addEventListener('mouseout', Events.onMouseOutThrottled);
  862.   },
  863.  
  864.   onMouseOverThrottled(force) {
  865.     const {start, e, node, nodeOut} = Events.hoverData || {};
  866.     if (!node || node === nodeOut && (Events.hoverData = null, 1))
  867.       return;
  868.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  869.     const wait = force ? 0 : start + SETTLE_TIME - now();
  870.     const t = Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  871.     if (t)
  872.       return;
  873.     Events.hoverData = null;
  874.     if (!Ruler.rules)
  875.       Ruler.init();
  876.     const info = RuleMatcher.adaptiveFind(node);
  877.     if (info && info.url && info.node !== ai.node)
  878.       App.activate(info, e);
  879.   },
  880.  
  881.   onMouseOut(e) {
  882.     if (!e.relatedTarget && !cfg.keepOnBlur && !e.shiftKey && App.canClose())
  883.       App.deactivate();
  884.   },
  885.  
  886.   onMouseOutThrottled(e) {
  887.     const d = Events.hoverData;
  888.     if (d) d.nodeOut = this;
  889.     this.removeEventListener('mouseout', Events.onMouseOutThrottled);
  890.     Events.hoverTimer = 0;
  891.   },
  892.  
  893.   onMouseOutShadow(e) {
  894.     const root = e.target.shadowRoot;
  895.     if (root) {
  896.       root.removeEventListener('mouseover', Events.onMouseOver);
  897.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  898.     }
  899.   },
  900.  
  901.   onMouseMove(e) {
  902.     Events.trackMouse(e);
  903.     if (e.shiftKey)
  904.       return;
  905.     if (!ai.zoomed && !ai.rectHovered && App.canClose()) {
  906.       App.deactivate();
  907.     } else if (ai.zoomed) {
  908.       Popup.move();
  909.       const {cx, cy, view: {w, h}} = ai;
  910.       const bx = w / 6;
  911.       const by = h / 6;
  912.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  913.       Status.set(`${onEdge ? '+' : '-'}edge`);
  914.     }
  915.   },
  916.  
  917.   onMouseDown({shiftKey, button, target}) {
  918.     if (!button && target === ai.popup && ai.popup.controls && (shiftKey || !App.canClose())) {
  919.       ai.controlled = ai.zoomed = true;
  920.     } else if (button === 2 || shiftKey) {
  921.       // Shift = ignore; RMB will be processed in onContext
  922.     } else {
  923.       App.deactivate({wait: true});
  924.       doc.addEventListener('mouseup', App.enable, {once: true});
  925.     }
  926.   },
  927.  
  928.   onMouseScroll(e) {
  929.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  930.     if (ai.zoomed) {
  931.       Events.zoomInOut(dir);
  932.     } else if (ai.gNum > 1 && ai.popup) {
  933.       Gallery.next(-dir);
  934.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  935.       App.toggleZoom();
  936.     } else if (App.canClose()) {
  937.       App.deactivate();
  938.       return;
  939.     }
  940.     dropEvent(e);
  941.   },
  942.  
  943.   onKeyDown(e) {
  944.     // Synthesized events may be of the wrong type and not have a `key`
  945.     const key = describeKey(e);
  946.     const p = ai.popupShown;
  947.     if (!p && key === '^Control') {
  948.       addEventListener('keyup', Events.onKeyUp, true);
  949.       Events.ctrl = true;
  950.     }
  951.     if (!p && key === '^ContextMenu')
  952.       return Events.onContext.call(this, e);
  953.     if (!p || e.repeat)
  954.       return;
  955.     switch (key) {
  956.       case '+Shift':
  957.         if (ai.shiftKeyTime)
  958.           return;
  959.         ai.shiftKeyTime = now();
  960.         Status.set('+shift');
  961.         if (cfg.uiInfo)
  962.           Bar.show(1);
  963.         if (isVideo(p))
  964.           p.controls = true;
  965.         return;
  966.       case 'KeyA':
  967.         p.toggleAttribute(NOAA_ATTR);
  968.         break;
  969.       case 'ArrowRight':
  970.       case 'KeyJ':
  971.         Gallery.next(1);
  972.         break;
  973.       case 'ArrowLeft':
  974.       case 'KeyK':
  975.         Gallery.next(-1);
  976.         break;
  977.       case 'KeyC':
  978.         Bar.setText(ai.bar.firstChild ? '' : ai.barText);
  979.         Bar.show(0);
  980.         break;
  981.       case 'KeyD':
  982.         Req.saveFile();
  983.         break;
  984.       case 'KeyF':
  985.         if (p !== document.fullscreenElement) p.requestFullscreen();
  986.         else document.exitFullscreen();
  987.         break;
  988.       case 'KeyH': // flip horizontally
  989.       case 'KeyV': // flip vertically
  990.       case 'KeyL': // rotate left
  991.       case 'KeyR': // rotate right
  992.         if (!p)
  993.           return;
  994.         if (key === 'KeyH' || key === 'KeyV') {
  995.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  996.           ai[side] = !ai[side];
  997.         } else {
  998.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  999.         }
  1000.         Bar.updateDetails();
  1001.         Popup.move();
  1002.         break;
  1003.       case 'KeyI':
  1004.         (ai.barShown ? Bar.hide : Bar.show)(2);
  1005.         break;
  1006.       case 'KeyM':
  1007.         if (isVideo(p))
  1008.           p.muted = !p.muted;
  1009.         break;
  1010.       case 'KeyN':
  1011.         ai.night = p.classList.toggle(`${PREFIX}night`);
  1012.         break;
  1013.       case 'KeyT':
  1014.         GM.openInTab(Util.tabFixUrl() || p.src);
  1015.         App.deactivate();
  1016.         break;
  1017.       case 'Minus':
  1018.       case 'NumpadSubtract':
  1019.         if (ai.zoomed) {
  1020.           Events.zoomInOut(-1);
  1021.         } else {
  1022.           App.toggleZoom();
  1023.         }
  1024.         break;
  1025.       case 'Equal':
  1026.       case 'NumpadAdd':
  1027.         if (ai.zoomed) {
  1028.           Events.zoomInOut(1);
  1029.         } else {
  1030.           App.toggleZoom();
  1031.         }
  1032.         break;
  1033.       case 'Escape':
  1034.         App.deactivate({wait: true});
  1035.         break;
  1036.       case '!Alt':
  1037.         return;
  1038.       default:
  1039.         App.deactivate({wait: true});
  1040.         return;
  1041.     }
  1042.     dropEvent(e);
  1043.   },
  1044.  
  1045.   onKeyUp(e) {
  1046.     const p = ai.popupShown || false;
  1047.     if (e.key === 'Control') {
  1048.       if (!p) removeEventListener('keyup', Events.onKeyUp, true);
  1049.       setTimeout(() => (Events.ctrl = false));
  1050.     }
  1051.     if (p && e.key === 'Shift' && ai.shiftKeyTime) {
  1052.       Status.set('-shift');
  1053.       if (cfg.uiInfo)
  1054.         Bar.hide(1);
  1055.       if (p.controls)
  1056.         p.controls = false;
  1057.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1058.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1059.         ai.controlled = false;
  1060.       else if (p && (ai.zoomed || ai.rectHovered !== false))
  1061.         App.toggleZoom();
  1062.       else
  1063.         App.deactivate({wait: true});
  1064.       ai.shiftKeyTime = 0;
  1065.     } else if (
  1066.       describeKey(e) === 'Control' && !p && !Events.ignoreKeyHeld &&
  1067.       (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)
  1068.     ) {
  1069.       dropEvent(e);
  1070.       if (Events.hoverData) {
  1071.         Events.hoverData.e = e;
  1072.         Events.onMouseOverThrottled(true);
  1073.       }
  1074.       if (ai.node) {
  1075.         ai.force = true;
  1076.         App.start();
  1077.       }
  1078.     }
  1079.   },
  1080.  
  1081.   onContext(e) {
  1082.     if (Events.ignoreKeyHeld)
  1083.       return;
  1084.     const p = ai.popupShown;
  1085.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1086.       dropEvent(e);
  1087.     } else if (!p && (!cfg.videoCtrl || !isVideo(ai.node) || Events.ctrl) && (
  1088.       cfg.start === 'context' ||
  1089.       cfg.start === 'contextMK' ||
  1090.       cfg.start === 'contextM' && (e.button === 2) ||
  1091.       cfg.start === 'contextK' && (e.button !== 2) ||
  1092.       (cfg.start === 'auto' && ai.rule.manual)
  1093.     )) {
  1094.       // right-clicked on an image while the context menu is shown for something else
  1095.       if (!ai.node && !Events.hoverData)
  1096.         Events.onMouseOver(e);
  1097.       Events.onMouseOverThrottled(true);
  1098.       if (ai.node) {
  1099.         ai.force = true;
  1100.         App.start();
  1101.         dropEvent(e);
  1102.       }
  1103.     } else if (p) {
  1104.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1105.     }
  1106.   },
  1107.  
  1108.   onVisibility(e) {
  1109.     Events.ctrl = false;
  1110.   },
  1111.  
  1112.   pierceShadow(node, x, y) {
  1113.     for (let root; (root = node.shadowRoot);) {
  1114.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1115.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1116.       const inner = root.elementFromPoint(x, y);
  1117.       if (!inner || inner === node)
  1118.         break;
  1119.       node = inner;
  1120.     }
  1121.     return node;
  1122.   },
  1123.  
  1124.   toggle(enable) {
  1125.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1126.     const passive = {passive: true, capture: true};
  1127.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1128.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1129.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1130.     window[onOff]('keyup', Events.onKeyUp, true);
  1131.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false, capture: true});
  1132.     ai.node.removeEventListener('mouseout', Events.onMouseOutThrottled);
  1133.   },
  1134.  
  1135.   trackMouse(e) {
  1136.     const cx = ai.cx = e.clientX;
  1137.     const cy = ai.cy = e.clientY;
  1138.     const r = ai.rect || (ai.rect = Calc.rect());
  1139.     ai.rectHovered =
  1140.       cx > r.left - 2 && cx < r.right + 2 &&
  1141.       cy > r.top - 2 && cy < r.bottom + 2;
  1142.   },
  1143.  
  1144.   zoomInOut(dir) {
  1145.     const i = Calc.scaleIndex(dir);
  1146.     const n = ai.scales.length;
  1147.     if (i >= 0 && i < n)
  1148.       ai.scale = ai.scales[i];
  1149.     const zo = cfg.zoomOut;
  1150.     if (i <= 0 && zo !== 'stay') {
  1151.       if (ai.scaleFit < ai.scale * .99) {
  1152.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1153.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1154.         App.deactivate({wait: true});
  1155.         return;
  1156.       }
  1157.       ai.zoomed = zo !== 'unzoom';
  1158.     } else {
  1159.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1160.     }
  1161.     if (ai.zooming)
  1162.       ai.popup.classList.add(`${PREFIX}zooming`);
  1163.     Popup.move();
  1164.     Bar.updateDetails();
  1165.   },
  1166. };
  1167.  
  1168. const Gallery = {
  1169.  
  1170.   makeParser(g) {
  1171.     return isFunction(g) ? g : Gallery.defaultParser;
  1172.   },
  1173.  
  1174.   findIndex(gUrl) {
  1175.     const sel = gUrl.split('#')[1];
  1176.     if (!sel)
  1177.       return 0;
  1178.     let i = +sel;
  1179.     if (i >= 0 && i === (i | 0))
  1180.       return i;
  1181.     for (i = 0; i < ai.gNum; i++) {
  1182.       const {url} = ai.gItems[i];
  1183.       if (isArray(url)
  1184.         ? url.indexOf(sel) || url.some(u => u.indexOf(sel, u.lastIndexOf('/')) > 0)
  1185.         : url === sel || url.indexOf(sel, url.lastIndexOf('/')) > 0
  1186.       ) return i;
  1187.     }
  1188.     return 0;
  1189.   },
  1190.  
  1191.   next(dir) {
  1192.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1193.     const item = ai.gItem = ai.gItems[ai.gIndex];
  1194.     if (isArray(item.url)) {
  1195.       ai.urls = item.url.slice(1);
  1196.       ai.url = item.url[0];
  1197.     } else {
  1198.       ai.urls = null;
  1199.       ai.url = item.url;
  1200.     }
  1201.     ai.gItemNext = ai.gItems[Gallery.nextIndex(dir || 1)];
  1202.     App.startSingle();
  1203.     Bar.updateName();
  1204.     if (dir) Bar.show(0);
  1205.   },
  1206.  
  1207.   nextIndex(dir) {
  1208.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1209.   },
  1210.  
  1211.   defaultParser(text, doc, docUrl, m, rule) {
  1212.     const {g} = rule;
  1213.     const gi = g.index;
  1214.     const qEntry = g.entry;
  1215.     const qCaption = ensureArray(g.caption);
  1216.     const qImage = g.image || 'img';
  1217.     const qTitle = g.title;
  1218.     const fix =
  1219.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1220.       (s => s.trim());
  1221.     const elems = [...$$(qEntry || qImage, doc)];
  1222.     const items = elems.map(processEntry).filter(Boolean);
  1223.     items.title = processTitle();
  1224.     items.index =
  1225.       RX_HAS_CODE.test(gi) ? Util.newFunction('items', 'node', gi)(items, ai.node) :
  1226.         typeof gi === 'string' ? Req.findImageUrl(tryCatch($, gi, doc), docUrl) :
  1227.           gi == null ? Math.max(0, elems.indexOf(ai.node)) :
  1228.             gi;
  1229.     return items;
  1230.  
  1231.     function processEntry(entry) {
  1232.       const item = {};
  1233.       try {
  1234.         const img = qEntry ? $(qImage, entry) : entry;
  1235.         item.url = fix(Req.findImageUrl(img, docUrl), true);
  1236.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1237.       } catch (e) {}
  1238.       return item.url && item;
  1239.     }
  1240.     function processCaption(sel) {
  1241.       const el = !sel ? this
  1242.         : $(sel, this) ||
  1243.           $orSelf(sel, this.previousElementSibling) ||
  1244.           $orSelf(sel, this.nextElementSibling);
  1245.       return el && fix(Ruler.runCHandler.default(el) || el.textContent);
  1246.     }
  1247.     function processTitle() {
  1248.       const el = $(qTitle, doc);
  1249.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1250.     }
  1251.     function $orSelf(selector, el) {
  1252.       if (el && !el.matches(qEntry))
  1253.         return el.matches(selector) ? el : $(selector, el);
  1254.     }
  1255.   },
  1256. };
  1257.  
  1258. const Menu = window === top && GM.registerMenuCommand && {
  1259.   curAltName: '',
  1260.   unreg: GM.unregisterMenuCommand,
  1261.   makeAltName: () => Menu.unreg
  1262.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1263.     : 'MPIV: toggle auto-start',
  1264.   register() {
  1265.     GM.registerMenuCommand('MPIV: configure', setup);
  1266.     Menu.registerAlt();
  1267.   },
  1268.   registerAlt() {
  1269.     if (cfg.startAltShown) {
  1270.       Menu.curAltName = Menu.makeAltName();
  1271.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1272.     }
  1273.   },
  1274.   reRegisterAlt() {
  1275.     const old = Menu.curAltName;
  1276.     if (old && Menu.unreg) Menu.unreg(old);
  1277.     if (!old || Menu.unreg) Menu.registerAlt();
  1278.   },
  1279.   onAltToggled() {
  1280.     const wasAuto = cfg.start === 'auto';
  1281.     if (wasAuto) {
  1282.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1283.     } else {
  1284.       cfg.startAlt = cfg.start;
  1285.       cfg.start = 'auto';
  1286.     }
  1287.     Menu.reRegisterAlt();
  1288.   },
  1289. };
  1290.  
  1291. const Popup = {
  1292.  
  1293.   async create(src, pageUrl, error) {
  1294.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1295.       (ai.popup.dataset.galleryFlip = '') === '';
  1296.     if (!ai.gItems)
  1297.       Popup.destroy();
  1298.     else if (ai.blobUrl)
  1299.       URL.revokeObjectURL(ai.blobUrl);
  1300.     ai.imageUrl = src;
  1301.     if (!src)
  1302.       return;
  1303.     const myAi = ai;
  1304.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1305.     if (ai !== myAi)
  1306.       return;
  1307.     if (!xhr && error) {
  1308.       App.handleError(error);
  1309.       return;
  1310.     }
  1311.     Object.assign(ai, {pageUrl, xhr});
  1312.     if (xhr)
  1313.       [src, isVideo] = await Req.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1314.     let vol;
  1315.     if (ai !== myAi || !src || isVideo && (vol = await GM.getValue('volume'), ai !== myAi))
  1316.       return;
  1317.     let p = ai.popup, blank;
  1318.     if (p) {
  1319.       p.src = blank = BLANK_PIXEL;
  1320.       ai.popupShown = null;
  1321.       ai.popupLoaded = false;
  1322.     } else p = ai.popup = isVideo ? PopupVideo.create(vol) : $new('img');
  1323.     p.id = `${PREFIX}popup`;
  1324.     p.src = src;
  1325.     p.addEventListener('error', App.handleError);
  1326.     if ((ai.night = (ai.night != null ? ai.night : cfg.night)))
  1327.       p.classList.add(`${PREFIX}night`);
  1328.     if (ai.zooming)
  1329.       p.addEventListener('transitionend', Popup.onZoom);
  1330.     $dataset(p, 'galleryFlip', inGallery);
  1331.     p.toggleAttribute('loaded', inGallery);
  1332.     const poo = ai.popover || typeof p.showPopover === 'function' && $('[popover]:popover-open');
  1333.     ai.popover = poo && poo.getBoundingClientRect().width && ($css(poo, {opacity: 0}), poo) || null;
  1334.     if (p.parentElement !== doc.body)
  1335.       doc.body.insertBefore(p, ai.bar && ai.bar.parentElement === doc.body && ai.bar || null);
  1336.     await 0;
  1337.     if (ai.popup !== p || App.checkProgress({start: true}) === false)
  1338.       return;
  1339.     if (!blank && p.complete)
  1340.       Popup.onLoad.call(p);
  1341.     else if (!isVideo)
  1342.       p.addEventListener('load', Popup.onLoad, {once: true});
  1343.   },
  1344.  
  1345.   destroy() {
  1346.     const p = ai.popup;
  1347.     if (!p) return;
  1348.     p.removeEventListener('load', Popup.onLoad);
  1349.     p.removeEventListener('error', App.handleError);
  1350.     if (ai.popover) {
  1351.       ai.popover.style.removeProperty('opacity');
  1352.       ai.popover = null;
  1353.     }
  1354.     if (isFunction(p.pause))
  1355.       p.pause();
  1356.     if (ai.blobUrl)
  1357.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1358.     p.remove();
  1359.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1360.   },
  1361.  
  1362.   move() {
  1363.     let x, y;
  1364.     const {cx, cy, extras, view} = ai;
  1365.     const vw = view.w - extras.outw;
  1366.     const vh = view.h - extras.outh;
  1367.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1368.     const h0 = ai.scale * ai.nheight + extras.inh;
  1369.     const isSwapped = ai.rotate % 180;
  1370.     const w = isSwapped ? h0 : w0;
  1371.     const h = isSwapped ? w0 : h0;
  1372.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1373.       const r = ai.rect;
  1374.       const rx = (r.left + r.right) / 2;
  1375.       const ry = (r.top + r.bottom) / 2;
  1376.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1377.         if (h < vh - 60)
  1378.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1379.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1380.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1381.         if (w < vw - 60)
  1382.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1383.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1384.       }
  1385.     }
  1386.     if (x == null) {
  1387.       x = vw > w
  1388.         ? (vw - w) / 2 + view.x
  1389.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1390.     }
  1391.     if (y == null) {
  1392.       y = vh > h
  1393.         ? (vh - h) / 2 + view.y
  1394.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1395.     }
  1396.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1397.     x += extras.o - diff;
  1398.     y += extras.o + diff;
  1399.     $css(ai.popup, {
  1400.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1401.                  `rotate(${ai.rotate || 0}deg) ` +
  1402.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1403.       width: `${Math.round(w0)}px`,
  1404.       height: `${Math.round(h0)}px`,
  1405.     });
  1406.   },
  1407.  
  1408.   onLoad() {
  1409.     if (this === ai.popup) {
  1410.       this.setAttribute('loaded', '');
  1411.       ai.popupLoaded = true;
  1412.       Status.set('-loading');
  1413.       let i = ai.gItem;
  1414.       if (i) i.url = this.src;
  1415.       if ((i = ai.gItemNext))
  1416.         Popup.preload(this, i);
  1417.     }
  1418.   },
  1419.  
  1420.   onZoom() {
  1421.     this.classList.remove(`${PREFIX}zooming`);
  1422.   },
  1423.  
  1424.   async preload(p, item, u = item.url, el = $new('img')) {
  1425.     ai.gItemNext = null;
  1426.     if (!isArray(u)) {
  1427.       el.src = u;
  1428.       return;
  1429.     }
  1430.     for (const arr = u; p === ai.popup && item.url === arr && (u = arr[0]);) {
  1431.       const {type} = await new Promise(cb => {
  1432.         el.src = u;
  1433.         el.onload = el.onerror = cb;
  1434.       });
  1435.       if (arr[0] === u)
  1436.         arr.shift();
  1437.       if (type === 'load') {
  1438.         item.url = u;
  1439.         break;
  1440.       }
  1441.     }
  1442.   },
  1443. };
  1444.  
  1445. const PopupVideo = {
  1446.   create(volume) {
  1447.     ai.bufBar = false;
  1448.     ai.bufStart = now();
  1449.     return $new('video', {
  1450.       autoplay: ai.preloadStart !== -1,
  1451.       controls: true,
  1452.       muted: cfg.mute || new AudioContext().state === 'suspended',
  1453.       loop: true,
  1454.       volume: clamp(+volume || .5, 0, 1),
  1455.       onprogress: PopupVideo.progress,
  1456.       oncanplaythrough: PopupVideo.progressDone,
  1457.       onvolumechange: PopupVideo.rememberVolume,
  1458.     });
  1459.   },
  1460.  
  1461.   progress() {
  1462.     const {duration} = this;
  1463.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1464.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1465.       if (ai.bar && (ai.bufBar |= pct > 0 && pct < 50))
  1466.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1467.     }
  1468.   },
  1469.  
  1470.   progressDone() {
  1471.     this.onprogress = this.oncanplaythrough = null;
  1472.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1473.       Bar.set(false);
  1474.     Popup.onLoad.call(this);
  1475.   },
  1476.  
  1477.   rememberVolume() {
  1478.     GM.setValue('volume', this.volume);
  1479.   },
  1480. };
  1481.  
  1482. const Ruler = {
  1483. /*
  1484.  'u' works only with URLs so it's ignored if 'html' is true
  1485.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1486.    |foo = url or text must start with foo
  1487.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1488.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1489.  'r' is checked only if 'u' matches first
  1490. */
  1491.   init() {
  1492.     const errors = new Map();
  1493.     /** @type mpiv.HostRule[] */
  1494.     const rules = Ruler.rules = (cfg.hosts || []).map(Ruler.parse, errors).filter(Boolean);
  1495.     const hasGMAE = typeof GM_addElement === 'function';
  1496.     const canEval = nonce || (nonce = ($('script[nonce]') || {}).nonce || '') || hasGMAE;
  1497.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1498.     const evalRules = [];
  1499.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1500.     for (const [rule, err] of errors.entries()) {
  1501.       if (!RX_EVAL_BLOCKED.test(err)) {
  1502.         App.handleError('Invalid custom host rule:', rule);
  1503.         continue;
  1504.       }
  1505.       if (canEval) {
  1506.         evalCode.push(evalRules.length ? ',' : '',
  1507.           '[', rules.indexOf(rule), ',{',
  1508.           ...Object.keys(FN_ARGS)
  1509.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1510.             .filter(Boolean),
  1511.           '}]');
  1512.       }
  1513.       evalRules.push(rule);
  1514.     }
  1515.     if (evalRules.length) {
  1516.       let result, wnd;
  1517.       if (canEval) {
  1518.         const GMAE = hasGMAE
  1519.           ? GM_addElement // eslint-disable-line no-undef
  1520.           : (tag, {textContent: txt}) => document.head.appendChild(
  1521.             Object.assign(document.createElement(tag), {
  1522.               textContent: trustedScript ? trustedScript(txt) : txt,
  1523.               nonce,
  1524.             }));
  1525.         evalCode.push(']; document.currentScript.remove();');
  1526.         GMAE('script', {textContent: evalCode.join('')});
  1527.         result = (wnd = unsafeWindow)[evalId] ||
  1528.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1529.       }
  1530.       if (result) {
  1531.         for (const [index, fns] of result)
  1532.           Object.assign(rules[index], fns);
  1533.         delete wnd[evalId];
  1534.       } else {
  1535.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1536.       }
  1537.     }
  1538.  
  1539.     // optimization: a rule is created only when on domain
  1540.     switch (dotDomain.match(/[^.]+(?=\.com?(?:\.[^.]+)?$)|[^.]+\.[^.]+$|$/)[0]) {
  1541.  
  1542.       case '4chan.org': rules.push({
  1543.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1544.         q: '.op .fileText a',
  1545.         css: '#post-preview{display:none}',
  1546.       }); break;
  1547.  
  1548.       case 'amazon': rules.push({
  1549.         r: /.+?images\/I\/.+?\./,
  1550.         s: m => {
  1551.           const uh = doc.getElementById('universal-hover');
  1552.           return uh ? '' : m[0] + 'jpg';
  1553.         },
  1554.         css: '#zoomWindow{display:none!important;}',
  1555.       }); break;
  1556.  
  1557.       case 'bing': rules.push({
  1558.         e: 'a[m*="murl"]',
  1559.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1560.         s: '$1',
  1561.         html: true,
  1562.       }); break;
  1563.  
  1564.       case 'deviantart': rules.push({
  1565.         e: 'a[href*="/art/"] img[src*="/v1/"]',
  1566.         r: /^(.+)\/v1\/\w+\/[^/]+\/(.+)-\d+.(\.\w+)(\?.+)/,
  1567.         s: ([, base, name, ext, tok], node) => {
  1568.           let v = Util.getReactChildren(node.closest('a'), 'props.deviation.media.types');
  1569.           return v && (v = v.find(t => t.t === 'fullview')) && `${base}${
  1570.             v.c ? v.c.replace('<prettyName>', name)
  1571.               : `/v1/fill/w_${v.w},h_${v.h}/${name}-fullview${ext}`}${tok}`;
  1572.         },
  1573.       }, {
  1574.         e: '.dev-view-deviation img',
  1575.         s: () => [
  1576.           $('.dev-page-download').href,
  1577.           $('.dev-content-full').src,
  1578.         ].filter(Boolean),
  1579.       }, {
  1580.         e: 'a[data-hook=deviation_link]',
  1581.         q: 'link[as=image]',
  1582.       }); break;
  1583.  
  1584.       case 'discord': rules.push({
  1585.         u: '||discordapp.net/external/',
  1586.         r: /\/https?\/(.+)/,
  1587.         s: '//$1',
  1588.         follow: true,
  1589.       }); break;
  1590.  
  1591.       case 'dropbox': rules.push({
  1592.         r: /(.+?&size_mode)=\d+(.*)/,
  1593.         s: '$1=5$2',
  1594.       }); break;
  1595.  
  1596.       case 'facebook': rules.push({
  1597.         e: 'a[href^="/photo/?"], a[href^="https://www.facebook.com/photo"]',
  1598.         s: (m, el) => (m = Util.getReactChildren(el.parentNode)) &&
  1599.           pick(m, (m[0] ? '0.props.linkProps' : 'props') + '.passthroughProps.origSrc'),
  1600.       }); break;
  1601.  
  1602.       case 'flickr': if (pick(unsafeWindow, 'YUI_config.flickr.api.site_key')) rules.push({
  1603.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1604.         s: m => `https://www.flickr.com/services/rest/?${
  1605.           new URLSearchParams({
  1606.             photo_id: m[1],
  1607.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1608.             method: 'flickr.photos.getSizes',
  1609.             format: 'json',
  1610.             nojsoncallback: 1,
  1611.           }).toString()}`,
  1612.         q: text => JSON.parse(text).sizes.size.pop().source,
  1613.         anonymous: true,
  1614.       }); break;
  1615.  
  1616.       case 'github': rules.push({
  1617.         r: new RegExp([
  1618.           /(avatars.+?&s=)\d+/,
  1619.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1620.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:avif|webp|png|jpe?g|bmp|gif|cur|ico|svg))$/,
  1621.         ].map(rx => rx.source).join('|')),
  1622.         s: m => `https://${
  1623.           m[1] ? `${m[1]}460` :
  1624.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1625.               $('.AppHeader-context-item > .octicon-lock')
  1626.                 ? `${m[4]}${m[5]}raw/${m[6]}`
  1627.                 : `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1628.         }`,
  1629.       }); break;
  1630.  
  1631.       case 'google': if (/[&?]tbm=isch(&|$)/.test(location.search)) rules.push({
  1632.         e: 'a[href*="imgres?imgurl="] img',
  1633.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1634.         follow: true,
  1635.       }, {
  1636.         e: '[data-tbnid] a:not([href])',
  1637.         s: (m, a) => {
  1638.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1639.           new MutationObserver((_, mo) => {
  1640.             mo.disconnect();
  1641.             App.isEnabled = true;
  1642.             a.alt = a2.innerText;
  1643.             const {left, top} = a.getBoundingClientRect();
  1644.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1645.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1646.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1647.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1648.         },
  1649.       }); break;
  1650.  
  1651.       case 'instagram': rules.push({
  1652.         e: 'a[href*="/p/"],' +
  1653.           'article [role="button"][tabindex="0"],' +
  1654.           'article [role="button"][tabindex="0"] div',
  1655.         s: (m, node, rule) => {
  1656.           let data, a, n, img, src;
  1657.           if (location.pathname.startsWith('/p/') || location.pathname.startsWith('/tv/')) {
  1658.             img = $('img[srcset], video', node.parentNode);
  1659.             if (img && (isVideo(img) || parseFloat(img.sizes) > 900))
  1660.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1661.           }
  1662.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1663.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1664.           }
  1665.           const numPics = a && pick(data, 'edge_sidecar_to_children.edges.length') ||
  1666.             a && pick(data, 'carousel_media_count');
  1667.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1668.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1669.           rule.follow = !data && !rule.g;
  1670.           rule._data = data;
  1671.           rule._img = img;
  1672.           return (
  1673.             !a && !src ? false :
  1674.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1&__d=dis' : ''}` :
  1675.                 data.video_url || data.display_url);
  1676.         },
  1677.         c: (html, doc, node, rule) =>
  1678.           rule._getCaption(rule._data) || (rule._img || 0).alt || '',
  1679.         follow: true,
  1680.         _q: 'meta[property="og:video"]',
  1681.         _g(text, doc, url, m, rule) {
  1682.           const json = tryJSON(text);
  1683.           const media =
  1684.             pick(json, 'graphql.shortcode_media') ||
  1685.             pick(json, 'items.0');
  1686.           const items =
  1687.             pick(media, 'edge_sidecar_to_children.edges', res => res.map(e => ({
  1688.               url: e.node.video_url || e.node.display_url,
  1689.             }))) ||
  1690.             pick(media, 'carousel_media', res => res.map(e => ({
  1691.               url: pick(e, 'video_versions.0.url') || pick(e, 'image_versions2.candidates.0.url'),
  1692.             })));
  1693.           items.title = rule._getCaption(media) || '';
  1694.           return items;
  1695.         },
  1696.         _getCaption: data => pick(data, 'caption.text') ||
  1697.           pick(data, 'edge_media_to_caption.edges.0.node.text'),
  1698.       }); break;
  1699.  
  1700.       case 'reddit': rules.push({
  1701.         u: '||i.reddituploads.com/',
  1702.       }, {
  1703.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1704.         s: (m, node) => $propUp(node, 'data-url'),
  1705.       }, {
  1706.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1707.         s: 'https://i$1',
  1708.       }); break;
  1709.  
  1710.       case 'stackoverflow': rules.push({
  1711.         e: '.post-tag, .post-tag img',
  1712.         s: '',
  1713.       }); break;
  1714.  
  1715.       case 'startpage': rules.push({
  1716.         r: /[&?]piurl=([^&]+)/,
  1717.         s: '$1',
  1718.         follow: true,
  1719.       }); break;
  1720.  
  1721.       case 'tumblr': rules.push({
  1722.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1723.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1724.         follow: true,
  1725.       }); break;
  1726.  
  1727.       case 'twitter': rules.push({
  1728.         e: '.grid-tweet > .media-overlay',
  1729.         s: (m, node) => node.previousElementSibling.src,
  1730.         follow: true,
  1731.       }); break;
  1732.     }
  1733.  
  1734.     rules.push(
  1735.       {
  1736.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1737.         s: '$1',
  1738.         follow: true,
  1739.         onerror: 'skip',
  1740.       },
  1741.       {
  1742.         u: [
  1743.           '||500px.com/photo/',
  1744.           '||cl.ly/',
  1745.           '||cweb-pix.com/',
  1746.           '//ibb.co/',
  1747.           '||imgcredit.xyz/image/',
  1748.         ],
  1749.         r: /\.\w+\/.+/,
  1750.         q: 'meta[property="og:image"]',
  1751.       },
  1752.       {
  1753.         u: 'attachment.php',
  1754.         r: /attachment\.php.+attachmentid/,
  1755.       },
  1756.       {
  1757.         u: '||abload.de/image',
  1758.         q: '#image',
  1759.       },
  1760.       {
  1761.         u: '||deviantart.com/art/',
  1762.         s: (m, node) =>
  1763.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1764.             '' :
  1765.             m.input,
  1766.         q: [
  1767.           '#download-button[href*=".jpg"]',
  1768.           '#download-button[href*=".jpeg"]',
  1769.           '#download-button[href*=".gif"]',
  1770.           '#download-button[href*=".png"]',
  1771.           '#gmi-ResViewSizer_fullimg',
  1772.           'img.dev-content-full',
  1773.         ],
  1774.       },
  1775.       {
  1776.         u: '||dropbox.com/s',
  1777.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1778.         q: (text, doc) =>
  1779.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1780.       },
  1781.       {
  1782.         r: /[./]ebay\.[^/]+\/itm\//,
  1783.         q: text =>
  1784.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1785.             .replace(/~~60_\d+/, '~~60_57'),
  1786.       },
  1787.       {
  1788.         u: '||i.ebayimg.com/',
  1789.         s: (m, node) =>
  1790.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1791.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1792.       },
  1793.       {
  1794.         u: '||fastpic.',
  1795.         s: (m, node) => {
  1796.           const a = node.closest('a');
  1797.           const url = decodeURIComponent(Req.findImageUrl(a || node))
  1798.             .replace(/\/i(\d+)\.(\w+\.\w+\/)\w+/, '/$2$1')
  1799.             .replace(/^\w+:\/\/fastpic[^/]+((?:\/\d+){3})\/\w+(\/\w+\.\w+).*/,
  1800.               'https://fastpic.org/view$1$2.html');
  1801.           return a || url.includes('.png') ? url : [url, url.replace(/\.jpe?g/, '.png')];
  1802.         },
  1803.         q: 'img[src*="/big/"]',
  1804.       },
  1805.       {
  1806.         u: '||flickr.com/photos/',
  1807.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1808.         s: m =>
  1809.           m.input.indexOf('/sizes/') < 0 ?
  1810.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1811.             false,
  1812.         q: (text, doc) => {
  1813.           const links = $$('.sizes-list a', doc);
  1814.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1815.         },
  1816.         follow: true,
  1817.       },
  1818.       {
  1819.         u: '||flickr.com/photos/',
  1820.         r: /\/sizes\//,
  1821.         q: '#allsizes-photo > img',
  1822.       },
  1823.       {
  1824.         u: '||gfycat.com/',
  1825.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1826.         s: 'https://$1$3',
  1827.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1828.       },
  1829.       {
  1830.         u: [
  1831.           '||googleusercontent.com/proxy',
  1832.           '||googleusercontent.com/gadgets/proxy',
  1833.         ],
  1834.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1835.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1836.       },
  1837.       {
  1838.         u: [
  1839.           '||googleusercontent.com/',
  1840.           '||ggpht.com/',
  1841.         ],
  1842.         s: m => m.input.includes('webcache.') ? '' :
  1843.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1844.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1845.       },
  1846.       {
  1847.         u: '||gravatar.com/',
  1848.         r: /([a-z0-9]{32})/,
  1849.         s: 'https://gravatar.com/avatar/$1?s=200',
  1850.       },
  1851.       {
  1852.         u: '//gyazo.com/',
  1853.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1854.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1855.         _q: 'link[rel="image_src"]',
  1856.       },
  1857.       {
  1858.         u: '||hostingkartinok.com/show-image.php',
  1859.         q: '.image img',
  1860.       },
  1861.       {
  1862.         u: [
  1863.           '||imagecurl.com/images/',
  1864.           '||imagecurl.com/viewer.php',
  1865.         ],
  1866.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1867.         s: 'https://imagecurl.com/images/$1$2$3',
  1868.       },
  1869.       {
  1870.         u: '||imagebam.com/',
  1871.         r: /^(https:\/\/)thumbs\d+(\.imagebam\.com\/).*?([^/]+)_t\./,
  1872.         s: '$1www$2view/$3',
  1873.         q: 'img.main-image',
  1874.       },
  1875.       {
  1876.         u: '||www.imagebam.com/view/',
  1877.         q: 'img.main-image',
  1878.       },
  1879.       {
  1880.         u: '||imageban.ru/thumbs',
  1881.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1882.         s: '$1out$2/$3/$4',
  1883.       },
  1884.       {
  1885.         u: [
  1886.           '||imageban.ru/show',
  1887.           '||imageban.net/show',
  1888.           '||ibn.im/',
  1889.         ],
  1890.         q: '#img_main',
  1891.       },
  1892.       {
  1893.         u: '||imageshack.us/img',
  1894.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1895.         s: 'https://$2/download/$1/$3$4',
  1896.       },
  1897.       {
  1898.         u: '||imageshack.us/i/',
  1899.         q: '#share-dl',
  1900.       },
  1901.       {
  1902.         u: '||imageteam.org/img',
  1903.         q: 'img[alt="image"]',
  1904.       },
  1905.       {
  1906.         u: [
  1907.           '||imagetwist.com/',
  1908.           '||imageshimage.com/',
  1909.         ],
  1910.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1911.         q: 'img.pic',
  1912.         xhr: true,
  1913.       },
  1914.       {
  1915.         u: '||imageupper.com/i/',
  1916.         q: '#img',
  1917.         xhr: true,
  1918.       },
  1919.       {
  1920.         u: '||imagevenue.com/',
  1921.         q: 'a[data-toggle="full"] img',
  1922.       },
  1923.       {
  1924.         u: '||imagezilla.net/show/',
  1925.         q: '#photo',
  1926.         xhr: true,
  1927.       },
  1928.       {
  1929.         u: [
  1930.           '||images-na.ssl-images-amazon.com/images/',
  1931.           '||media-imdb.com/images/',
  1932.         ],
  1933.         r: /images\/.+?\.jpg/,
  1934.         s: '/V1\\.?_.+?\\.//g',
  1935.       },
  1936.       {
  1937.         u: '||imgbox.com/',
  1938.         r: /\.com\/([a-z0-9]+)$/i,
  1939.         q: '#img',
  1940.         xhr: hostname !== 'imgbox.com',
  1941.       },
  1942.       {
  1943.         u: '||imgclick.net/',
  1944.         r: /\.net\/(\w+)/,
  1945.         q: 'img.pic',
  1946.         xhr: true,
  1947.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1948.       },
  1949.       {
  1950.         u: '.imgcredit.xyz/',
  1951.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1952.         s: ['https$1$2', 'https$1.png'],
  1953.       },
  1954.       {
  1955.         u: [
  1956.           '||imgflip.com/i/',
  1957.           '||imgflip.com/gif/',
  1958.         ],
  1959.         r: /\/(i|gif)\/([^/?#]+)/,
  1960.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1961.       },
  1962.       {
  1963.         u: [
  1964.           '||imgur.com/a/',
  1965.           '||imgur.com/gallery/',
  1966.         ],
  1967.         s: 'gallery', // suppressing an unused network request for remote `document`
  1968.         async g() {
  1969.           let u = `https://imgur.com/ajaxalbums/getimages/${ai.url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1970.           let info = tryJSON((await Req.gmXhr(u)).responseText) || 0;
  1971.           let images = (info.data || 0).images || [];
  1972.           if (!images[0]) {
  1973.             info = (await Req.gmXhr(ai.url)).responseText.match(/postDataJSON=(".*?")<|$/)[1];
  1974.             info = tryJSON(tryJSON(info)) || 0;
  1975.             images = info.media;
  1976.           }
  1977.           const items = [];
  1978.           for (const img of images) {
  1979.             const meta = img.metadata || img;
  1980.             items.push({
  1981.               url: img.url ||
  1982.                 (u = `https://i.imgur.com/${img.hash}`) && (
  1983.                   img.ext === '.gif' && img.animated !== false ?
  1984.                     [`${u}.webm`, `${u}.mp4`, u] :
  1985.                     u + img.ext
  1986.                 ),
  1987.               desc: [meta.title, meta.description].filter(Boolean).join(' - '),
  1988.             });
  1989.           }
  1990.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1991.             items.title = info.title;
  1992.           return items;
  1993.         },
  1994.       },
  1995.       {
  1996.         u: '||imgur.com/',
  1997.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1998.         s: 'gallery',
  1999.         g: (text, doc, url, m) =>
  2000.           m[2].split(',').map(id => ({
  2001.             url: `https://i.${m[1]}${id}.jpg`,
  2002.           })),
  2003.       },
  2004.       {
  2005.         u: '||imgur.com/',
  2006.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  2007.         s: (m, node) => {
  2008.           if (/memegen|random|register|search|signin/.test(m.input))
  2009.             return '';
  2010.           const a = node.closest('a');
  2011.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  2012.             return false;
  2013.           // postfixes: huge, large, medium, thumbnail, big square, small square
  2014.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  2015.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  2016.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  2017.           return ext === 'webm' ?
  2018.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  2019.             u + ext;
  2020.         },
  2021.       },
  2022.       {
  2023.         u: [
  2024.           '||instagr.am/p/',
  2025.           '||instagram.com/p/',
  2026.           '||instagram.com/tv/',
  2027.         ],
  2028.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') +
  2029.         '/?__a=1&__d=dis',
  2030.         q: m => (m = tryJSON(m)) && (
  2031.           m = pick(m, 'graphql.shortcode_media') || pick(m, 'items.0') || 0
  2032.         ) && (
  2033.           m.video_url ||
  2034.           m.display_url ||
  2035.           pick(m, 'video_versions.0.url') ||
  2036.           pick(m, 'carousel_media.0.image_versions2.candidates.0.url') ||
  2037.           pick(m, 'image_versions2.candidates.0.url')
  2038.         ),
  2039.         rect: 'div.PhotoGridMediaItem',
  2040.         c: m => (m = tryJSON(m)) && (
  2041.           pick(m, 'items.0.caption.text') ||
  2042.           pick(m, 'graphql.shortcode_media.edge_media_to_caption.edges.0.node.text') ||
  2043.           ''
  2044.         ),
  2045.       },
  2046.       {
  2047.         u: [
  2048.           '||livememe.com/',
  2049.           '||lvme.me/',
  2050.         ],
  2051.         r: /\.\w+\/([^.]+)$/,
  2052.         s: 'http://i.lvme.me/$1.jpg',
  2053.       },
  2054.       {
  2055.         u: '||lostpic.net/image',
  2056.         q: '.image-viewer-image img',
  2057.       },
  2058.       {
  2059.         u: '||makeameme.org/meme/',
  2060.         r: /\/meme\/([^/?#]+)/,
  2061.         s: 'https://media.makeameme.org/created/$1.jpg',
  2062.       },
  2063.       {
  2064.         u: '||photobucket.com/',
  2065.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  2066.         s: 'https://i$1$3',
  2067.         xhr: !dotDomain.endsWith('.photobucket.com'),
  2068.       },
  2069.       {
  2070.         u: '||piccy.info/view3/',
  2071.         r: /(.+?\/view3)\/(.*)\//,
  2072.         s: '$1/$2/orig/',
  2073.         q: '#mainim',
  2074.       },
  2075.       {
  2076.         u: '||pimpandhost.com/image/',
  2077.         r: /(.+?\/image\/[0-9]+)/,
  2078.         s: '$1?size=original',
  2079.         q: 'img.original',
  2080.       },
  2081.       {
  2082.         u: [
  2083.           '||pixroute.com/',
  2084.           '||imgspice.com/',
  2085.         ],
  2086.         r: /\.html$/,
  2087.         q: 'img[id]',
  2088.         xhr: true,
  2089.       },
  2090.       {
  2091.         u: '||postima',
  2092.         r: /postima?ge?\.org\/image\/\w+/,
  2093.         q: [
  2094.           'a[href*="dl="]',
  2095.           '#main-image',
  2096.         ],
  2097.       },
  2098.       {
  2099.         u: [
  2100.           '||prntscr.com/',
  2101.           '||prnt.sc/',
  2102.         ],
  2103.         r: /\.\w+\/.+/,
  2104.         q: 'meta[property="og:image"]',
  2105.         xhr: true,
  2106.       },
  2107.       {
  2108.         u: '||radikal.ru/',
  2109.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2110.         s: (m, node, rule) =>
  2111.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2112.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2113.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2114.       },
  2115.       {
  2116.         u: '||tumblr.com',
  2117.         r: /_500\.jpg/,
  2118.         s: ['/_500/_1280/', ''],
  2119.       },
  2120.       {
  2121.         u: '||twimg.com/media/',
  2122.         r: /.+?format=(jpe?g|png|gif)/i,
  2123.         s: '$0&name=orig',
  2124.       },
  2125.       {
  2126.         u: '||twimg.com/media/',
  2127.         r: /.+?\.(jpe?g|png|gif)/i,
  2128.         s: '$0:orig',
  2129.       },
  2130.       {
  2131.         u: '||twimg.com/1/proxy',
  2132.         r: /t=([^&_]+)/i,
  2133.         s: m => atob(m[1]).match(/http.+/),
  2134.       },
  2135.       {
  2136.         u: '||twimg.com/',
  2137.         r: /\/profile_images/i,
  2138.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2139.       },
  2140.       {
  2141.         u: '||pic.twitter.com/',
  2142.         r: /\.com\/[a-z0-9]+/i,
  2143.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2144.         follow: true,
  2145.       },
  2146.       {
  2147.         u: '||twitpic.com/',
  2148.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2149.         s: 'https://twitpic.com/show/large/$2',
  2150.       },
  2151.       {
  2152.         u: '||wiki',
  2153.         r: /\/(?:thumb|images)\/.+\.(?:jpe?g|gif|png|svg)/i,
  2154.         s: m => m.input.replace(/\/(thumb(?=\/)|\d+px[^/]+(?=$|\?))/g, '')
  2155.           .replace(/\/(scale-to-width(-[a-z]+)?\/\d+|(zoom-crop|smart)(\/(width|height)\/\d+)+)/g, '/'),
  2156.         xhr: !hostname.includes('wiki'),
  2157.       },
  2158.       {
  2159.         u: '||ytimg.com/vi/',
  2160.         r: /(.+?\/vi\/[^/]+)/,
  2161.         s: '$1/0.jpg',
  2162.         rect: '.video-list-item',
  2163.       },
  2164.       {
  2165.         u: '/viewer.php?file=',
  2166.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2167.         s: '$1/images/$2',
  2168.         xhr: true,
  2169.       },
  2170.       {
  2171.         u: '/thumb_',
  2172.         r: /\/albums.+\/thumb_[^/]/,
  2173.         s: '/thumb_//',
  2174.       },
  2175.       {
  2176.         u: [
  2177.           '.th.jp',
  2178.           '.th.gif',
  2179.           '.th.png',
  2180.         ],
  2181.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2182.         s: '$1$2',
  2183.         follow: true,
  2184.       },
  2185.       {
  2186.         r: RX_MEDIA_URL,
  2187.       }
  2188.     );
  2189.   },
  2190.  
  2191.   format(rule, {expand} = {}) {
  2192.     const s = Util.stringify(rule, null, ' ');
  2193.     return expand ?
  2194.       /* {"a": ...,
  2195.           "b": ...,
  2196.           "c": ...
  2197.          } */
  2198.       s.replace(/^{\s+/g, '{') :
  2199.       /* {"a": ..., "b": ..., "c": ...} */
  2200.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2201.   },
  2202.  
  2203.   fromElement(el) {
  2204.     const text = el.textContent.trim();
  2205.     if (text.startsWith('{') &&
  2206.         text.endsWith('}') &&
  2207.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2208.       const rule = tryJSON(text);
  2209.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2210.     }
  2211.   },
  2212.  
  2213.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2214.  
  2215.   /** @returns mpiv.HostRule | Error | false | undefined */
  2216.   parse(rule) {
  2217.     const isBatchOp = this instanceof Map;
  2218.     try {
  2219.       if (typeof rule === 'string')
  2220.         rule = JSON.parse(rule);
  2221.       if ('d' in rule && typeof rule.d !== 'string')
  2222.         rule.d = undefined;
  2223.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2224.         return false;
  2225.       let {e} = rule;
  2226.       if (e != null) {
  2227.         e = typeof e === 'string' ? e.trim()
  2228.           : isArray(e) ? e.join(',').trim()
  2229.             : Object.entries(e).every(Ruler.isValidE2) && e;
  2230.         if (!e)
  2231.           throw new Error('Invalid syntax for "e". Examples: ' +
  2232.             '"e": ".image" or ' +
  2233.             '"e": [".image1", ".image2"] or ' +
  2234.             '"e": {".parent": ".image"} or ' +
  2235.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2236.         if (isBatchOp) rule.e = e || undefined;
  2237.       }
  2238.       let compileTo = isBatchOp ? rule : {};
  2239.       if (rule.r)
  2240.         compileTo.r = new RegExp(rule.r, 'i');
  2241.       if (App.NOP)
  2242.         compileTo = {};
  2243.       for (const key of Object.keys(FN_ARGS)) {
  2244.         if (RX_HAS_CODE.test(rule[key])) {
  2245.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2246.           if (fn !== App.NOP || !isBatchOp) {
  2247.             compileTo[key] = fn;
  2248.           } else if (isBatchOp) {
  2249.             this.set(rule, 'unsafe-eval');
  2250.           }
  2251.         }
  2252.       }
  2253.       return rule;
  2254.     } catch (err) {
  2255.       if (isBatchOp) {
  2256.         this.set(rule, err);
  2257.         return rule;
  2258.       } else {
  2259.         return err;
  2260.       }
  2261.     }
  2262.   },
  2263.  
  2264.   runC(text, doc = document) {
  2265.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2266.     ai.caption = fn(text, doc);
  2267.   },
  2268.  
  2269.   runCHandler: {
  2270.     function: (text, doc) =>
  2271.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2272.     string: (text, doc) => {
  2273.       const el = $many(ai.rule.c, doc);
  2274.       return !el ? '' :
  2275.         el.getAttribute('content') ||
  2276.         el.getAttribute('title') ||
  2277.         el.textContent;
  2278.     },
  2279.     default: (text, doc, el = ai.node) =>
  2280.       (ai.tooltip || 0).text ||
  2281.       el.alt ||
  2282.       $propUp(el, 'title') ||
  2283.       Req.getFileName(
  2284.         el.tagName === (ai.popup || 0).tagName
  2285.           ? ai.url
  2286.           : el.src || $propUp(el, 'href')),
  2287.   },
  2288.  
  2289.   runQ(text, doc, docUrl) {
  2290.     let url;
  2291.     if (isFunction(ai.rule.q)) {
  2292.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2293.       if (isArray(url)) {
  2294.         ai.urls = url.slice(1);
  2295.         url = url[0];
  2296.       }
  2297.     } else {
  2298.       const el = $many(ai.rule.q, doc);
  2299.       url = Req.findImageUrl(el, docUrl);
  2300.     }
  2301.     return url;
  2302.   },
  2303.  
  2304.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2305.   runE(rule, e, node) {
  2306.     let p, img, res, info;
  2307.     for (const selParent in e) {
  2308.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2309.         if (img === node)
  2310.           res = true;
  2311.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2312.           return info;
  2313.       }
  2314.     }
  2315.     return res;
  2316.   },
  2317.  
  2318.   /** @returns {?Array} if falsy then the rule should be skipped */
  2319.   runS(node, rule, m) {
  2320.     let urls = [], u;
  2321.     for (const s of ensureArray(rule.s))
  2322.       urls.push(
  2323.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2324.           isFunction(s) ? s(m, node, rule) :
  2325.             s);
  2326.     if (rule.q && urls.length > 1) {
  2327.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2328.       return;
  2329.     }
  2330.     if (isArray(u = urls[0]))
  2331.       u = [urls = u][0];
  2332.     return u === '' /* "stop all rules" */ ? urls
  2333.       : u && arrayFrom(new Set(urls), Util.decodeUrl);
  2334.   },
  2335.  
  2336.   /** @returns {boolean} */
  2337.   runU(rule, url) {
  2338.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2339.     return u.fn.call(u.data, url);
  2340.   },
  2341.  
  2342.   substituteSingle(s, m) {
  2343.     if (!m || m.input == null) return s;
  2344.     if (s.startsWith('/') && !s.startsWith('//')) {
  2345.       const mid = s.search(/[^\\]\//) + 1;
  2346.       const end = s.lastIndexOf('/');
  2347.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2348.       return m.input.replace(re, s.slice(mid + 1, end));
  2349.     }
  2350.     if (m.length && s.includes('$')) {
  2351.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2352.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2353.         for (let i = maxLength; i >= 0; i--) {
  2354.           const part = num.slice(0, i) | 0;
  2355.           if (part < m.length)
  2356.             return (m[part] || '') + num.slice(i);
  2357.         }
  2358.         return text;
  2359.       });
  2360.     }
  2361.     return s;
  2362.   },
  2363.  
  2364.   toggle(rule, prop, condition) {
  2365.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2366.     return condition;
  2367.   },
  2368. };
  2369.  
  2370. const RuleMatcher = {
  2371.  
  2372.   /** @returns {Object} */
  2373.   adaptiveFind(node, opts) {
  2374.     const tn = node.tagName;
  2375.     const src = node.currentSrc || node.src || '';
  2376.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2377.     let a, info, url;
  2378.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2379.     if (tn !== 'A') {
  2380.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2381.       info = RuleMatcher.find(url, node, opts);
  2382.     }
  2383.     if (!info && (a = node.closest('A'))) {
  2384.       const ds = a.dataset;
  2385.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2386.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2387.       url = !url.startsWith('data:') && url;
  2388.       info = RuleMatcher.find(url, a, opts);
  2389.     }
  2390.     if (!info && isPic)
  2391.       info = {node, rule: {}, url: src};
  2392.     return info;
  2393.   },
  2394.  
  2395.   /** @returns ?mpiv.RuleMatchInfo */
  2396.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2397.     let tn, isPic, html, h;
  2398.     for (const rule of rules || Ruler.rules) {
  2399.       let e, m;
  2400.       if (skipRules && skipRules.includes(rule) ||
  2401.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2402.           !rules && (e = rule.e) &&
  2403.             !(m = typeof e === 'string' ? node.matches(e) : Ruler.runE(rule, e, node)))
  2404.         continue;
  2405.       if (m && m.url)
  2406.         return m;
  2407.       const {r, s} = rule;
  2408.       let hasS = s != null;
  2409.       h = !noHtml && (r || hasS) && rule.html && (html || (html = node.outerHTML));
  2410.       if (r) {
  2411.         m = h ? r.exec(h) : url && r.exec(url);
  2412.       } else {
  2413.         m = ['']; m[0] = m.input = h || url || ''; m.index = 0;
  2414.       }
  2415.       if (!m)
  2416.         continue;
  2417.       if (s === '')
  2418.         return {};
  2419.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2420.       // but we'll only allow it to match rules without 's' in the nested find call
  2421.       if (!hasS && !skipRules && (tn ? isPic : isPic = (tn = node.tagName) === 'IMG' || tn === 'VIDEO'))
  2422.         continue;
  2423.       hasS &= s !== 'gallery';
  2424.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2425.       if (urls)
  2426.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2427.     }
  2428.   },
  2429.  
  2430.   /** @returns ?mpiv.RuleMatchInfo */
  2431.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2432.     let info;
  2433.     let url = `${urls[0]}`;
  2434.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2435.     if (url)
  2436.       url = Util.rel2abs(url);
  2437.     else
  2438.       info = {};
  2439.     if (follow)
  2440.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2441.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2442.       const xhr = cfg.xhr && rule.xhr;
  2443.       info = {
  2444.         match,
  2445.         node,
  2446.         rule,
  2447.         url,
  2448.         urls: urls.length > 1 ? urls.slice(1) : null,
  2449.         gallery: rule.g && Gallery.makeParser(rule.g),
  2450.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2451.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2452.       };
  2453.     }
  2454.     return info;
  2455.   },
  2456.  
  2457.   isFollowableUrl(url, rule) {
  2458.     const f = rule.follow;
  2459.     return isFunction(f) ? f(url) : f;
  2460.   },
  2461. };
  2462.  
  2463. const Req = {
  2464.  
  2465.   gmXhr(url, opts = {}) {
  2466.     if (ai.req)
  2467.       tryCatch(ai.req.abort);
  2468.     return new Promise((resolve, reject) => {
  2469.       const {anonymous} = ai.rule || {};
  2470.       ai.req = GM.xmlHttpRequest(Object.assign({
  2471.         url,
  2472.         anonymous,
  2473.         withCredentials: !anonymous,
  2474.         method: 'GET',
  2475.         timeout: 30e3,
  2476.       }, opts, {
  2477.         onload: done,
  2478.         onerror: done,
  2479.         ontimeout() {
  2480.           ai.req = null;
  2481.           reject(`Timeout fetching ${url}`);
  2482.         },
  2483.       }));
  2484.       function done(r) {
  2485.         ai.req = null;
  2486.         if (r.status < 400 && !r.error)
  2487.           resolve(r);
  2488.         else
  2489.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2490.       }
  2491.     });
  2492.   },
  2493.  
  2494.   async getDoc(url) {
  2495.     if (!url) {
  2496.       // current document
  2497.       return {
  2498.         doc,
  2499.         finalUrl: location.href,
  2500.         responseText: doc.documentElement.outerHTML,
  2501.       };
  2502.     }
  2503.     const r = await (!ai.post ?
  2504.       Req.gmXhr(url) :
  2505.       Req.gmXhr(url, {
  2506.         method: 'POST',
  2507.         data: ai.post,
  2508.         headers: {
  2509.           'Content-Type': 'application/x-www-form-urlencoded',
  2510.           'Referer': url,
  2511.         },
  2512.       }));
  2513.     r.doc = $parseHtml(r.responseText);
  2514.     return r;
  2515.   },
  2516.  
  2517.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2518.     ai.bufBar = false;
  2519.     ai.bufStart = now();
  2520.     const response = await Req.gmXhr(url, {
  2521.       responseType: 'blob',
  2522.       headers: {
  2523.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2524.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2525.       },
  2526.       onprogress: Req.getImageProgress,
  2527.     });
  2528.     Bar.set(false);
  2529.     const type = Req.guessMimeType(response);
  2530.     let b = response.response;
  2531.     if (!b) throw 'Empty response';
  2532.     if (b.type !== type)
  2533.       b = b.slice(0, b.size, type);
  2534.     const res = xhr === 'blob'
  2535.       ? (ai.blobUrl = URL.createObjectURL(b))
  2536.       : await Req.blobToDataUrl(b);
  2537.     return [res, type.startsWith('video')];
  2538.   },
  2539.  
  2540.   getImageProgress(e) {
  2541.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2542.       ai.bufBar = true;
  2543.     if (ai.bufBar) {
  2544.       const pct = e.loaded / e.total * 100 | 0;
  2545.       const size = e.total / 1024 | 0;
  2546.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2547.     }
  2548.   },
  2549.  
  2550.   async findRedirect() {
  2551.     try {
  2552.       const {finalUrl} = await Req.gmXhr(ai.url, {
  2553.         method: 'HEAD',
  2554.         headers: {
  2555.           'Referer': location.href.split('#', 1)[0],
  2556.         },
  2557.       });
  2558.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2559.       if (!info || !info.url)
  2560.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2561.       Object.assign(ai, info);
  2562.       App.startSingle();
  2563.     } catch (e) {
  2564.       App.handleError(e);
  2565.     }
  2566.   },
  2567.  
  2568.   async saveFile() {
  2569.     const url = ai.popup.src || ai.popup.currentSrc;
  2570.     let name = Req.getFileName(ai.imageUrl || url);
  2571.     if (!name.includes('.'))
  2572.       name += '.jpg';
  2573.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2574.       $new('a', {href: url, download: name})
  2575.         .dispatchEvent(new MouseEvent('click'));
  2576.     } else {
  2577.       Status.set('+loading');
  2578.       const onload = () => Status.set('-loading');
  2579.       const gmDL = typeof GM_download === 'function';
  2580.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2581.         url,
  2582.         name,
  2583.         headers: {Referer: url},
  2584.         method: 'get', // polyfilling GM_download
  2585.         responseType: 'blob', // polyfilling GM_download
  2586.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2587.         onerror: e => {
  2588.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2589.           onload();
  2590.         },
  2591.         onprogress: Req.getImageProgress,
  2592.         onload({response}) {
  2593.           onload();
  2594.           if (!gmDL) { // polyfilling GM_download
  2595.             const a = Object.assign(document.createElement('a'), {
  2596.               href: URL.createObjectURL(response),
  2597.               download: name,
  2598.             });
  2599.             a.dispatchEvent(new MouseEvent('click'));
  2600.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2601.           }
  2602.         },
  2603.       });
  2604.     }
  2605.   },
  2606.  
  2607.   getFileName(url) {
  2608.     return decodeURIComponent(url).split(/[#?&]/, 1)[0].split('/').pop();
  2609.   },
  2610.  
  2611.   blobToDataUrl(blob) {
  2612.     return new Promise((resolve, reject) => {
  2613.       const fr = new FileReader();
  2614.       fr.onload = () => resolve(fr.result);
  2615.       fr.onerror = reject;
  2616.       fr.readAsDataURL(blob);
  2617.     });
  2618.   },
  2619.  
  2620.   guessMimeType({responseHeaders, finalUrl}) {
  2621.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2622.         !RegExp.$1.includes('text/plain'))
  2623.       return RegExp.$1;
  2624.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2625.     switch (ext.toLowerCase()) {
  2626.       case 'bmp': return 'image/bmp';
  2627.       case 'gif': return 'image/gif';
  2628.       case 'jpe': return 'image/jpeg';
  2629.       case 'jpeg': return 'image/jpeg';
  2630.       case 'jpg': return 'image/jpeg';
  2631.       case 'mp4': return 'video/mp4';
  2632.       case 'png': return 'image/png';
  2633.       case 'svg': return 'image/svg+xml';
  2634.       case 'tif': return 'image/tiff';
  2635.       case 'tiff': return 'image/tiff';
  2636.       case 'webm': return 'video/webm';
  2637.       default: return 'application/octet-stream';
  2638.     }
  2639.   },
  2640.  
  2641.   findImageUrl(n, url) {
  2642.     if (!n) return;
  2643.     let html;
  2644.     const path =
  2645.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2646.       n.getAttribute('src') ||
  2647.       n.getAttribute('data-m4v') ||
  2648.       n.getAttribute('href') ||
  2649.       n.getAttribute('content') ||
  2650.       (html = n.outerHTML).includes('http') &&
  2651.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2652.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2653.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2654.   },
  2655. };
  2656.  
  2657. const Status = {
  2658.  
  2659.   set(status) {
  2660.     if (!status && !cfg.globalStatus) {
  2661.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2662.       return;
  2663.     }
  2664.     const prefix = cfg.globalStatus ? PREFIX : '';
  2665.     const action = status && /^[+-]/.test(status) && status[0];
  2666.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2667.     const el = cfg.globalStatus ? doc.documentElement :
  2668.       name === 'edge' ? ai.popup :
  2669.         ai.node;
  2670.     if (!el) return;
  2671.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2672.     const oldValue = (el.getAttribute(attr) || '').trim();
  2673.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2674.     switch (action) {
  2675.       case '-':
  2676.         cls.delete(name);
  2677.         break;
  2678.       case false:
  2679.         for (const c of cls)
  2680.           if (c.startsWith(prefix) && c !== name)
  2681.             cls.delete(c);
  2682.       // fallthrough to +
  2683.       case '+':
  2684.         if (name)
  2685.           cls.add(name);
  2686.         break;
  2687.     }
  2688.     const newValue = [...cls].join(' ');
  2689.     if (newValue !== oldValue)
  2690.       el.setAttribute(attr, newValue);
  2691.   },
  2692.  
  2693.   loading(force) {
  2694.     if (!force) {
  2695.       clearTimeout(ai.timerStatus);
  2696.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2697.     } else if (!ai.popupLoaded) {
  2698.       Status.set('+loading');
  2699.     }
  2700.   },
  2701. };
  2702.  
  2703. const UrlMatcher = (() => {
  2704.   // string-to-regexp escaped chars
  2705.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2706.   // rx for '^' symbol in simple url match
  2707.   const RX_SEP = /[^\w%._-]/y;
  2708.   const RXS_SEP = RX_SEP.source;
  2709.   return match => {
  2710.     const results = [];
  2711.     for (const s of ensureArray(match)) {
  2712.       const pinDomain = s.startsWith('||');
  2713.       const pinStart = !pinDomain && s.startsWith('|');
  2714.       const endSep = s.endsWith('^');
  2715.       let fn;
  2716.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2717.       if (needle.includes('^')) {
  2718.         let plain = '';
  2719.         for (const part of needle.split('^'))
  2720.           if (part.length > plain.length)
  2721.             plain = part;
  2722.         const rx = new RegExp(
  2723.           (pinStart ? '^' : '') +
  2724.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2725.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2726.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2727.         needle = [plain, rx];
  2728.         fn = regexp;
  2729.       } else if (pinStart) {
  2730.         fn = endSep ? equals : starts;
  2731.       } else if (pinDomain) {
  2732.         const slashPos = needle.indexOf('/');
  2733.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2734.         needle = [needle, domain, slashPos > 0, endSep];
  2735.         fn = startsDomainPrescreen;
  2736.       } else if (endSep) {
  2737.         fn = ends;
  2738.       } else {
  2739.         fn = has;
  2740.       }
  2741.       results.push({fn, data: needle});
  2742.     }
  2743.     return results.length > 1 ?
  2744.       {fn: checkArray, data: results} :
  2745.       results[0];
  2746.   };
  2747.   function checkArray(s) {
  2748.     return this.some(checkArrayItem, s);
  2749.   }
  2750.   function checkArrayItem(item) {
  2751.     return item.fn.call(item.data, this);
  2752.   }
  2753.   function ends(s) {
  2754.     return s.endsWith(this) || (
  2755.       s.length > this.length &&
  2756.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2757.       endsWithSep(s));
  2758.   }
  2759.   function endsWithSep(s, pos = s.length - 1) {
  2760.     RX_SEP.lastIndex = pos;
  2761.     return RX_SEP.test(s);
  2762.   }
  2763.   function equals(s) {
  2764.     return s.startsWith(this) && (
  2765.       s.length === this.length ||
  2766.       s.length === this.length + 1 && endsWithSep(s));
  2767.   }
  2768.   function has(s) {
  2769.     return s.includes(this);
  2770.   }
  2771.   function regexp(s) {
  2772.     return s.includes(this[0]) && this[1].test(s);
  2773.   }
  2774.   function starts(s) {
  2775.     return s.startsWith(this);
  2776.   }
  2777.   function startsDomainPrescreen(url) {
  2778.     return url.includes(this[0]) && startsDomain.call(this, url);
  2779.   }
  2780.   function startsDomain(url) {
  2781.     let hostStart = url.indexOf('//');
  2782.     if (hostStart && url[hostStart - 1] !== ':')
  2783.       return;
  2784.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2785.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2786.     const [needle, domain, pinDomainEnd, endSep] = this;
  2787.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2788.     for (; ; start++) {
  2789.       start = host.indexOf(domain, start);
  2790.       if (start < 0)
  2791.         return;
  2792.       if (!start || host[start - 1] === '.')
  2793.         break;
  2794.     }
  2795.     start += hostStart;
  2796.     if (url.lastIndexOf(needle, start) !== start)
  2797.       return;
  2798.     const end = start + needle.length;
  2799.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2800.   }
  2801. })();
  2802.  
  2803. const Util = {
  2804.  
  2805.   addStyle(name, css) {
  2806.     const id = `${PREFIX}style:${name}`;
  2807.     const el = doc.getElementById(id) ||
  2808.                css && $new('style', {id});
  2809.     if (!el) return;
  2810.     if (el.textContent !== css)
  2811.       el.textContent = css;
  2812.     if (el.parentElement !== doc.head)
  2813.       doc.head.appendChild(el);
  2814.     return el;
  2815.   },
  2816.  
  2817.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2818.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2819.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2820.   },
  2821.  
  2822.   decodeHtmlEntities(s) {
  2823.     return s
  2824.       .replace(/&quot;/g, '"')
  2825.       .replace(/&apos;/g, '\'')
  2826.       .replace(/&lt;/g, '<')
  2827.       .replace(/&gt;/g, '>')
  2828.       .replace(/&amp;/g, '&');
  2829.   },
  2830.  
  2831.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2832.   decodeUrl(url) {
  2833.     if (!url || typeof url !== 'string') return url;
  2834.     const iPct = url.indexOf('%');
  2835.     const iColon = url.indexOf(':');
  2836.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2837.       decodeURIComponent(url) :
  2838.       url;
  2839.   },
  2840.  
  2841.   deepEqual(a, b) {
  2842.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2843.       return a === b;
  2844.     if (isArray(a)) {
  2845.       return isArray(b) &&
  2846.         a.length === b.length &&
  2847.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2848.     }
  2849.     const keys = Object.keys(a);
  2850.     return keys.length === Object.keys(b).length &&
  2851.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2852.   },
  2853.  
  2854.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2855.  
  2856.   forceLayout(node) {
  2857.     // eslint-disable-next-line no-unused-expressions
  2858.     node.clientHeight;
  2859.   },
  2860.  
  2861.   formatError(e, rule) {
  2862.     const msg = e.message;
  2863.     const {url: u, imageUrl: iu} = ai;
  2864.     e = msg ? e :
  2865.       e.readyState && 'Request failed.' ||
  2866.       e.type === 'error' && `File can't be displayed.${
  2867.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2868.       }` ||
  2869.       e;
  2870.     let fmt;
  2871.     const res = [
  2872.       fmt = '%c%s%c', 'font-weight:bold', e, 'font-weight:normal',
  2873.       (fmt += '\nNode: %o', ai.node),
  2874.       (fmt += '\nRule: %o', rule),
  2875.       u && (fmt += '\nURL: %s', u),
  2876.       iu && iu !== u && (fmt += '\nFile: %s', iu),
  2877.       e.stack,
  2878.     ].filter(Boolean);
  2879.     res[0] = fmt;
  2880.     res.message = msg || e;
  2881.     return res;
  2882.   },
  2883.  
  2884.   getReactChildren(el, path) {
  2885.     if (isFF) el = el.wrappedJSObject || el;
  2886.     for (const k of Object.keys(el))
  2887.       if (typeof k === 'string' && k.startsWith('__reactProps'))
  2888.         return (el = el[k].children) && (path ? pick(el, path) : el);
  2889.   },
  2890.  
  2891.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2892.  
  2893.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2894.  
  2895.   newFunction(...args) {
  2896.     try {
  2897.       return App.NOP || (trustedScript
  2898.         // eslint-disable-next-line no-eval
  2899.         ? window.eval(trustedScript(`(function anonymous(${args.slice(0, -1).join(',')}){${args.slice(-1)[0]}})`))
  2900.         : new Function(...args)
  2901.       );
  2902.     } catch (e) {
  2903.       if (!RX_EVAL_BLOCKED.test(e.message))
  2904.         throw e;
  2905.       App.NOP = () => {};
  2906.       return App.NOP;
  2907.     }
  2908.   },
  2909.  
  2910.   rel2abs(rel, abs = location.href) {
  2911.     try {
  2912.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2913.         new URL(rel, abs).href;
  2914.     } catch (e) {
  2915.       return rel;
  2916.     }
  2917.   },
  2918.  
  2919.   stringify(...args) {
  2920.     const p = Array.prototype;
  2921.     const {toJSON} = p;
  2922.     if (toJSON) p.toJSON = null;
  2923.     const res = JSON.stringify(...args);
  2924.     if (toJSON) p.toJSON = toJSON;
  2925.     return res;
  2926.   },
  2927.  
  2928.   suppressTooltip() {
  2929.     for (const node of [
  2930.       ai.node.parentNode,
  2931.       ai.node,
  2932.       ai.node.firstElementChild,
  2933.     ]) {
  2934.       const t = (node || 0).title;
  2935.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2936.         ai.tooltip = {node, text: t};
  2937.         node.title = '';
  2938.         break;
  2939.       }
  2940.     }
  2941.   },
  2942.  
  2943.   tabFixUrl() {
  2944.     const {tabfix = App.tabfix} = ai.rule;
  2945.     return tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2946.            flattenHtml(`data:text/html;charset=utf8,
  2947.       <style>
  2948.         body {
  2949.           margin: 0;
  2950.           padding: 0;
  2951.           background: #222;
  2952.         }
  2953.         .fit {
  2954.           overflow: hidden
  2955.         }
  2956.         .fit > img {
  2957.           max-width: 100vw;
  2958.           max-height: 100vh;
  2959.         }
  2960.         body > img {
  2961.           margin: auto;
  2962.           position: absolute;
  2963.           left: 0;
  2964.           right: 0;
  2965.           top: 0;
  2966.           bottom: 0;
  2967.         }
  2968.       </style>
  2969.       <body class=fit>
  2970.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2971.       </body>
  2972.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2973.   },
  2974. };
  2975.  
  2976. async function setup({rule} = {}) {
  2977.   if (!isFunction(doc.body.attachShadow)) {
  2978.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2979.           'You can edit the script\'s storage directly in your userscript manager.');
  2980.     return;
  2981.   }
  2982.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2983.   let uiCfg;
  2984.   let root = (elSetup || 0).shadowRoot;
  2985.   let {blankRuleElement} = setup;
  2986.   /** @type {{[id:string]: HTMLElement}} */
  2987.   const UI = setup.UI = new Proxy({}, {
  2988.     get(_, id) {
  2989.       return root.getElementById(id);
  2990.     },
  2991.   });
  2992.   if (!rule || !elSetup)
  2993.     init(await Config.load({save: true}));
  2994.   if (rule)
  2995.     installRule(rule);
  2996.  
  2997.   function init(data) {
  2998.     uiCfg = data;
  2999.     $remove(elSetup);
  3000.     elSetup = $new('div', {contentEditable: true});
  3001.     root = elSetup.attachShadow({mode: 'open'});
  3002.     root.append(...createSetupElement());
  3003.     initEvents();
  3004.     renderAll();
  3005.     renderCustomScales();
  3006.     renderRules();
  3007.     doc.body.appendChild(elSetup);
  3008.     requestAnimationFrame(() => {
  3009.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elSetup.clientHeight / 4) + 'px';
  3010.     });
  3011.   }
  3012.  
  3013.   function initEvents() {
  3014.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  3015.     UI._export.onclick = e => {
  3016.       dropEvent(e);
  3017.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  3018.       UI._exportNotification.hidden = false;
  3019.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  3020.     };
  3021.     UI._import.onclick = e => {
  3022.       dropEvent(e);
  3023.       const s = prompt('Paste settings:');
  3024.       if (s)
  3025.         init(new Config({data: s}));
  3026.     };
  3027.     UI._install.onclick = setupRuleInstaller;
  3028.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  3029.     UI._reveal.onclick = e => {
  3030.       e.preventDefault();
  3031.       cssApp.hidden = !cssApp.hidden;
  3032.       if (!cssApp.hidden) {
  3033.         if (!cssApp.value) {
  3034.           App.updateStyles();
  3035.           cssApp.value = App.globalStyle.trim();
  3036.           cssApp.setSelectionRange(0, 0);
  3037.         }
  3038.         cssApp.focus();
  3039.       }
  3040.     };
  3041.     UI.start.onchange = function () {
  3042.       UI.delay.closest('label').hidden =
  3043.         UI.preload.closest('label').hidden =
  3044.           this.value !== 'auto';
  3045.     };
  3046.     UI.start.onchange();
  3047.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  3048.     // color
  3049.     for (const el of $$('[type="color"]', root)) {
  3050.       el.oninput = colorOnInput;
  3051.       el.elSwatch = el.nextElementSibling;
  3052.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  3053.       el.elOpacity.elColor = el;
  3054.     }
  3055.     function colorOnInput() {
  3056.       this.elSwatch.style.setProperty('--color',
  3057.         Util.color(this.value, this.elOpacity.valueAsNumber));
  3058.     }
  3059.     // range
  3060.     for (const el of $$('[type="range"]', root)) {
  3061.       el.oninput = rangeOnInput;
  3062.       el.onblur = rangeOnBlur;
  3063.       el.addEventListener('focusin', rangeOnFocus);
  3064.     }
  3065.     function rangeOnBlur(e) {
  3066.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  3067.         this.elEdit.onblur(e);
  3068.     }
  3069.     function rangeOnFocus() {
  3070.       if (this.elEdit) return;
  3071.       const {min, max, step, value} = this;
  3072.       this.elEdit = $new('input', {
  3073.         value, min, max, step,
  3074.         className: 'range-edit',
  3075.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3076.         type: 'number',
  3077.         elRange: this,
  3078.         onblur: rangeEditOnBlur,
  3079.         oninput: rangeEditOnInput,
  3080.       });
  3081.       this.insertAdjacentElement('afterend', this.elEdit);
  3082.     }
  3083.     function rangeOnInput() {
  3084.       this.title = (this.dataset.title || '').replace('$', this.value);
  3085.       if (this.elColor) this.elColor.oninput();
  3086.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3087.     }
  3088.     // range-edit
  3089.     function rangeEditOnBlur(e) {
  3090.       if (e.relatedTarget !== this.elRange) {
  3091.         this.remove();
  3092.         this.elRange.elEdit = null;
  3093.       }
  3094.     }
  3095.     function rangeEditOnInput() {
  3096.       this.elRange.valueAsNumber = this.valueAsNumber;
  3097.       this.elRange.oninput();
  3098.     }
  3099.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3100.     // which may happen since it sees only the outer <div> in the event |target|
  3101.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3102.   }
  3103.  
  3104.   function closeSetup(event) {
  3105.     const isApply = this.id === '_apply';
  3106.     if (event && (this.id === '_ok' || isApply)) {
  3107.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3108.       Ruler.init();
  3109.       Menu.reRegisterAlt();
  3110.       if (isApply) {
  3111.         renderCustomScales();
  3112.         UI._css.textContent = cfg._getCss();
  3113.         return;
  3114.       }
  3115.     }
  3116.     $remove(elSetup);
  3117.     elSetup = null;
  3118.   }
  3119.  
  3120.   function collectConfig({save, clone} = {}) {
  3121.     let data = {};
  3122.     for (const el of $$('input[id], select[id]', root))
  3123.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3124.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3125.           el.value || '';
  3126.     Object.assign(data, {
  3127.       css: UI.css.value.trim(),
  3128.       delay: UI.delay.valueAsNumber * 1000,
  3129.       hosts: collectRules(),
  3130.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3131.       scales: UI.scales.value
  3132.         .trim()
  3133.         .split(/[,;]*\s+/)
  3134.         .map(x => x.replace(',', '.'))
  3135.         .filter(x => !isNaN(parseFloat(x))),
  3136.     });
  3137.     if (clone)
  3138.       data = JSON.parse(Util.stringify(data));
  3139.     return new Config({data, save});
  3140.   }
  3141.  
  3142.   function collectRules() {
  3143.     return [...UI._rules.children]
  3144.       .map(el => [el.value.trim(), el[RULE]])
  3145.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3146.       .map(([s, json]) => json || s)
  3147.       .filter(Boolean);
  3148.   }
  3149.  
  3150.   function checkRule({target: el}) {
  3151.     let json, error, title;
  3152.     const prev = el.previousElementSibling;
  3153.     if (el.value) {
  3154.       json = Ruler.parse(el.value);
  3155.       error = json instanceof Error && (json.message || String(json));
  3156.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3157.         !/^[-.a-z0-9]*$/i.test(json.d);
  3158.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3159.         .filter(Boolean).join('\n');
  3160.       el.classList.toggle('invalid-domain', invalidDomain);
  3161.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3162.       if (!prev)
  3163.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3164.     } else if (prev) {
  3165.       prev.focus();
  3166.       el.remove();
  3167.     }
  3168.     el[RULE] = !error && json;
  3169.     el.title = title;
  3170.     el.setCustomValidity(error || '');
  3171.   }
  3172.  
  3173.   async function focusRule({target: el, relatedTarget: from}) {
  3174.     if (el === this)
  3175.       return;
  3176.     await new Promise(setTimeout);
  3177.     if (el[RULE] && el.rows < 2) {
  3178.       let i = el.selectionStart;
  3179.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3180.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3181.       el.setSelectionRange(i, i);
  3182.       el.rows = txt.match(/^/gm).length;
  3183.     }
  3184.     if (!this.contains(from))
  3185.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3186.   }
  3187.  
  3188.   function installRule(rule) {
  3189.     const inputs = UI._rules.children;
  3190.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3191.     if (!el) {
  3192.       el = inputs[0];
  3193.       el[RULE] = rule;
  3194.       el.value = Ruler.format(rule);
  3195.       el.hidden = false;
  3196.       const i = Math.max(0, collectRules().indexOf(rule));
  3197.       inputs[i].insertAdjacentElement('afterend', el);
  3198.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3199.     }
  3200.     const rect = el.getBoundingClientRect();
  3201.     if (rect.bottom < 0 ||
  3202.         rect.bottom > el.parentNode.offsetHeight)
  3203.       el.scrollIntoView();
  3204.     el.classList.add('highlight');
  3205.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3206.     el.focus();
  3207.   }
  3208.  
  3209.   function renderRules() {
  3210.     const rules = UI._rules;
  3211.     rules.addEventListener('input', checkRule);
  3212.     rules.addEventListener('focusin', focusRule);
  3213.     rules.addEventListener('paste', focusRule);
  3214.     blankRuleElement =
  3215.       setup.blankRuleElement =
  3216.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3217.     for (const rule of uiCfg.hosts || []) {
  3218.       const el = blankRuleElement.cloneNode();
  3219.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3220.       rules.appendChild(el);
  3221.       checkRule({target: el});
  3222.     }
  3223.     const search = UI._search;
  3224.     search.oninput = () => {
  3225.       setup.search = search.value;
  3226.       const s = search.value.toLowerCase();
  3227.       for (const el of rules.children)
  3228.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3229.     };
  3230.     search.value = setup.search || '';
  3231.     if (search.value)
  3232.       search.oninput();
  3233.   }
  3234.  
  3235.   function renderCustomScales() {
  3236.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3237.   }
  3238.  
  3239.   function renderAll() {
  3240.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3241.       if (el.id in uiCfg)
  3242.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3243.     for (const el of $$('input[type="range"]', root))
  3244.       el.oninput();
  3245.     for (const el of $$('a[href^="http"]', root))
  3246.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3247.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3248.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3249.   }
  3250. }
  3251.  
  3252. function setupClickedRule(event) {
  3253.   let rule;
  3254.   const el = event.target.closest('blockquote, code, pre');
  3255.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3256.     dropEvent(event);
  3257.     setup({rule});
  3258.   }
  3259. }
  3260.  
  3261. /** @this {HTMLButtonElement} */
  3262. async function setupRuleInstaller(e) {
  3263.   dropEvent(e);
  3264.   const parent = setup.UI._rules2;
  3265.   this.disabled = true;
  3266.   this.textContent = 'Loading...';
  3267.   let rules;
  3268.  
  3269.   try {
  3270.     rules = extractRules(await Req.getDoc(this.parentElement.href));
  3271.     this.textContent = 'Rules loaded.';
  3272.     const el = $new('select', {
  3273.       size: 8,
  3274.       style: 'width: 100%',
  3275.       ondblclick: e => e.target !== el && maybeSetup(e),
  3276.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3277.     }, rules.map(renderRule));
  3278.     const i = el.selectedIndex = findMatchingRuleIndex();
  3279.     parent.append(
  3280.       $new('div#_installHint', [
  3281.         'Double-click the rule (or select and press Enter) to add it. ',
  3282.         'Click ', $new('code', 'Apply'), ' or ', $new('code', 'OK'), ' to confirm.',
  3283.       ]),
  3284.       el
  3285.     );
  3286.     if (i) requestAnimationFrame(() => {
  3287.       const optY = el.selectedOptions[0].offsetTop - el.offsetTop;
  3288.       el.scrollTo(0, optY - el.offsetHeight / 2);
  3289.     });
  3290.     el.focus();
  3291.   } catch (e) {
  3292.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3293.   }
  3294.  
  3295.   function extractRules({doc}) {
  3296.     // sort by name
  3297.     return [...$$('#wiki-body tr', doc)]
  3298.       .map(tr => [
  3299.         tr.cells[0].textContent.trim(),
  3300.         Ruler.fromElement(tr.cells[1]),
  3301.       ])
  3302.       .filter(([name, r]) =>
  3303.         name && r && (!r.d || hostname.includes(r.d)))
  3304.       .sort(([a], [b]) =>
  3305.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3306.           a > b ? 1 :
  3307.             0);
  3308.   }
  3309.  
  3310.   function findMatchingRuleIndex() {
  3311.     const dottedHost = `.${hostname}.`;
  3312.     let maxCount = 0, maxIndex = 0, index = 0;
  3313.     for (const [name, {d}] of rules) {
  3314.       let count = !!(d && hostname.includes(d)) * 10;
  3315.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3316.         count += dottedHost.includes(`.${part}.`) && part.length;
  3317.       if (count > maxCount) {
  3318.         maxCount = count;
  3319.         maxIndex = index;
  3320.       }
  3321.       index++;
  3322.     }
  3323.     return maxIndex;
  3324.   }
  3325.  
  3326.   function renderRule([name, rule]) {
  3327.     return $new('option', {
  3328.       textContent: name,
  3329.       title: Ruler.format(rule, {expand: true})
  3330.         .replace(/^{|\s*}$/g, '')
  3331.         .split('\n')
  3332.         .slice(0, 12)
  3333.         .map(renderTitleLine)
  3334.         .filter(Boolean)
  3335.         .join('\n'),
  3336.     });
  3337.   }
  3338.  
  3339.   function renderTitleLine(line, i, arr) {
  3340.     return (
  3341.       // show ... on 10th line if there are more lines
  3342.       i === 9 && arr.length > 10 ? '...' :
  3343.         i > 10 ? '' :
  3344.           // truncate to 100 chars
  3345.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3346.             // strip the leading space
  3347.             .replace(/^\s/, ''));
  3348.   }
  3349.  
  3350.   function maybeSetup(e) {
  3351.     if (!eventModifiers(e))
  3352.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3353.   }
  3354. }
  3355.  
  3356. const CSS_SETUP = /*language=css*/ `
  3357.   :host {
  3358.     all: initial !important;
  3359.     position: fixed !important;
  3360.     z-index: 2147483647 !important;
  3361.     top: 20px !important;
  3362.     right: 20px !important;
  3363.     padding: 1.5em !important;
  3364.     color: #000 !important;
  3365.     background: #eee !important;
  3366.     box-shadow: 5px 5px 25px 2px #000 !important;
  3367.     width: 33em !important;
  3368.     border: 1px solid black !important;
  3369.     display: flex !important;
  3370.     flex-direction: column !important;
  3371.   }
  3372.   main {
  3373.     font: 12px/15px sans-serif;
  3374.   }
  3375.   table {
  3376.     text-align:left;
  3377.   }
  3378.   ul {
  3379.     max-height: calc(100vh - 200px);
  3380.     margin: 0 0 15px 0;
  3381.     padding: 0;
  3382.     list-style: none;
  3383.   }
  3384.   li {
  3385.     margin: 0;
  3386.     padding: .25em 0;
  3387.   }
  3388.   li.options {
  3389.     display: flex;
  3390.     align-items: center;
  3391.     justify-content: space-between;
  3392.   }
  3393.   li.row {
  3394.     align-items: start;
  3395.     flex-wrap: wrap;
  3396.   }
  3397.   li.row label {
  3398.     display: flex;
  3399.     flex-direction: row;
  3400.     align-items: center;
  3401.   }
  3402.   li.row input {
  3403.     margin-right: .25em;
  3404.   }
  3405.   li.stretch label {
  3406.     flex: 1;
  3407.     white-space: nowrap;
  3408.   }
  3409.   li.stretch label > span {
  3410.     display: flex;
  3411.     flex-direction: row;
  3412.     flex: 1;
  3413.   }
  3414.   label {
  3415.     display: inline-flex;
  3416.     flex-direction: column;
  3417.   }
  3418.   label:not(:last-child) {
  3419.     margin-right: 1em;
  3420.   }
  3421.   input, select {
  3422.     min-height: 1.3em;
  3423.     box-sizing: border-box;
  3424.   }
  3425.   input[type=checkbox] {
  3426.     margin-left: 0;
  3427.   }
  3428.   input[type=number] {
  3429.     width: 4em;
  3430.   }
  3431.   input:not([type=checkbox])  {
  3432.     padding: 0 .25em;
  3433.   }
  3434.   input[type=range] {
  3435.     flex: 1;
  3436.     width: 100%;
  3437.     margin: 0 .25em;
  3438.     padding: 0;
  3439.     filter: saturate(0);
  3440.     opacity: .5;
  3441.   }
  3442.   u + input[type=range] {
  3443.     max-width: 3em;
  3444.   }
  3445.   input[type=range]:hover {
  3446.     filter: none;
  3447.     opacity: 1;
  3448.   }
  3449.   input[type=color] {
  3450.     position: absolute;
  3451.     width: calc(1.5em + 2px);
  3452.     opacity: 0;
  3453.     cursor: pointer;
  3454.   }
  3455.   u {
  3456.     position: relative;
  3457.     flex: 0 0 1.5em;
  3458.     height: 1.5em;
  3459.     border: 1px solid #888;
  3460.     pointer-events: none;
  3461.     color: #888;
  3462.     background-image:
  3463.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3464.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3465.     background-size: .5em .5em;
  3466.     background-position: 0 0, .25em .25em;
  3467.   }
  3468.   u::after {
  3469.     position: absolute;
  3470.     top: 0;
  3471.     left: 0;
  3472.     right: 0;
  3473.     bottom: 0;
  3474.     content: "";
  3475.     background-color: var(--color);
  3476.   }
  3477.   .range-edit {
  3478.     position: absolute;
  3479.     box-shadow: 0 0.25em 1em #000;
  3480.     z-index: 99;
  3481.   }
  3482.   textarea {
  3483.     resize: vertical;
  3484.     margin: 1px 0;
  3485.     font: 11px/1.25 Consolas, monospace;
  3486.   }
  3487.   :invalid {
  3488.     background-color: #f002;
  3489.     border-color: #800;
  3490.   }
  3491.   code {
  3492.     font-weight: bold;
  3493.   }
  3494.   a {
  3495.     text-decoration: none;
  3496.     color: LinkText;
  3497.     cursor: pointer;
  3498.   }
  3499.   a:hover {
  3500.     text-decoration: underline;
  3501.   }
  3502.   button {
  3503.     padding: .2em .5em;
  3504.     margin-right: 1em;
  3505.   }
  3506.   kbd {
  3507.     padding: 1px 6px;
  3508.     font-weight: bold;
  3509.     font-family: Consolas, monospace;
  3510.     border: 1px solid #888;
  3511.     border-radius: 3px;
  3512.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3513.   }
  3514.   .column {
  3515.     display: flex;
  3516.     flex-direction: column;
  3517.   }
  3518.   .flex {
  3519.     display: flex;
  3520.   }
  3521.   .highlight {
  3522.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3523.     animation-fill-mode: both;
  3524.   }
  3525.   #_rules > * {
  3526.     word-break: break-all;
  3527.   }
  3528.   #_rules > :not(:focus) {
  3529.     overflow: hidden; /* prevents wrapping in FF */
  3530.   }
  3531.   .invalid-domain {
  3532.     opacity: .5;
  3533.   }
  3534.   .matching-domain {
  3535.     border-color: #56b8ff;
  3536.     background: #d7eaff;
  3537.   }
  3538.   #_x {
  3539.     position: absolute;
  3540.     top: 0;
  3541.     right: 0;
  3542.     padding: 4px 8px;
  3543.     cursor: pointer;
  3544.     user-select: none;
  3545.   }
  3546.   #_x:hover {
  3547.     background-color: #8884;
  3548.   }
  3549.   #_cssApp {
  3550.     color: seagreen;
  3551.   }
  3552.   #_exportNotification {
  3553.     color: green;
  3554.     font-weight: bold;
  3555.     position: absolute;
  3556.     bottom: 4px;
  3557.     right: 26px;
  3558.   }
  3559.   #_installHint {
  3560.     color: green;
  3561.   }
  3562.   #_usage {
  3563.     display: flex;
  3564.     flex-wrap: wrap;
  3565.     align-items: flex-start;
  3566.     gap: 1em;
  3567.   }
  3568.   #_usage th {
  3569.     font-weight: normal;
  3570.     padding-right: .5em;
  3571.   }
  3572.   #_usage tr:nth-last-child(n + 2) > :not(br) {
  3573.     white-space: pre-line;
  3574.     border-bottom: 1px dotted #8888;
  3575.   }
  3576.   #_usage kbd {
  3577.     font-family: monospace;
  3578.     font-weight: bold;
  3579.   }
  3580.   @keyframes fade-in {
  3581.     from { background-color: deepskyblue }
  3582.     to {}
  3583.   }
  3584.   @media (prefers-color-scheme: dark) {
  3585.     :host {
  3586.       color: #aaa !important;
  3587.       background: #333 !important;
  3588.     }
  3589.     a {
  3590.       color: deepskyblue;
  3591.     }
  3592.     button {
  3593.       background: linear-gradient(-5deg, #333, #555);
  3594.       border: 1px solid #000;
  3595.       box-shadow: 0 2px 6px #181818;
  3596.       border-radius: 3px;
  3597.       cursor: pointer;
  3598.     }
  3599.     button:hover {
  3600.       background: linear-gradient(-5deg, #333, #666);
  3601.     }
  3602.     textarea, input, select {
  3603.       background: #111;
  3604.       color: #BBB;
  3605.       border: 1px solid #555;
  3606.     }
  3607.     input[type=checkbox] {
  3608.       filter: invert(1);
  3609.     }
  3610.     input[type=range] {
  3611.       filter: invert(1) saturate(0);
  3612.     }
  3613.     input[type=range]:hover {
  3614.       filter: invert(1);
  3615.     }
  3616.     kbd {
  3617.       border-color: #666;
  3618.     }
  3619.     @supports (-moz-appearance: none) {
  3620.       input[type=checkbox],
  3621.       input[type=range],
  3622.       input[type=range]:hover {
  3623.         filter: none;
  3624.       }
  3625.     }
  3626.     .range-edit {
  3627.       box-shadow: 0 .5em 1em .5em #000;
  3628.     }
  3629.     .matching-domain {
  3630.       border-color: #0065af;
  3631.       background: #032b58;
  3632.       color: #ddd;
  3633.     }
  3634.     #_cssApp {
  3635.       color: darkseagreen;
  3636.     }
  3637.     #_installHint {
  3638.       color: greenyellow;
  3639.     }
  3640.     ::-webkit-scrollbar {
  3641.       width: 14px;
  3642.       height: 14px;
  3643.       background: #333;
  3644.     }
  3645.     ::-webkit-scrollbar-button:single-button {
  3646.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3647.     }
  3648.     ::-webkit-scrollbar-track-piece {
  3649.       background: #444;
  3650.       border: 4px solid #333;
  3651.       border-radius: 8px;
  3652.     }
  3653.     ::-webkit-scrollbar-thumb {
  3654.       border: 3px solid #333;
  3655.       border-radius: 8px;
  3656.       background: #666;
  3657.     }
  3658.     ::-webkit-resizer {
  3659.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3660.       border: 2px solid transparent;
  3661.     }
  3662.   }
  3663. `;
  3664.  
  3665. function createSetupElement() {
  3666.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3667.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3668.   const $newLink = (text, href, props) =>
  3669.     $new('a', Object.assign({target: '_blank'}, href && {href}, props), text);
  3670.   const $newCheck = (label, id, title = '', props) =>
  3671.     $new('label', Object.assign({title}, props), [
  3672.       $new('input', {id, type: 'checkbox'}),
  3673.       label,
  3674.     ]);
  3675.   const $newKbd = s => s[0] === '{' ? $new('kbd', s.slice(1, -1)) : s;
  3676.   const $newRange = (id, title = '', min = 0, max = 100, step = 1, type = 'range') =>
  3677.     $new('input', {id, min, max, step, type, 'data-title': title});
  3678.   const $newSelect = (label, id, values) =>
  3679.     $new('label', [
  3680.       label,
  3681.       $new('select', {id}, Object.entries(values).map(([k, v]) =>
  3682.         $new('option', Object.assign({value: k}, typeof v === 'object' ? v : {textContent: v})))),
  3683.     ]);
  3684.   const $newTR = ([name, val]) =>
  3685.     $new('tr', !name ? $new('br') : [
  3686.       $new('th', ((name = name.split(/(\n)/))[0] = $new('b', name[0])) && name),
  3687.       $new('td', val.split(/({.+?})/).map($newKbd)),
  3688.     ]);
  3689.   return [
  3690.     $new('style', CSS_SETUP),
  3691.     $new('style#_css', cfg._getCss()),
  3692.     $new(`main#${PREFIX}setup`, [
  3693.       $new('div#_x', 'x'),
  3694.       $new('ul.column', [
  3695.         $new('details', {style: 'order:1; padding-top: .5em;'}, [
  3696.           $new('summary', {style: 'cursor: pointer'},
  3697.             $new('b', 'Help & hotkeys...')),
  3698.           $new('#_usage', [
  3699.             $new('table', [
  3700.               ['Activate', 'hover the target'],
  3701.               ['Deactivate', 'move cursor off target, or click, or zoom out fully'],
  3702.               ['Ignore target', 'hold {Shift} ⏵ hover the target ⏵ release the key'],
  3703.               ['Freeze popup', 'hold {Shift} ⏵ leave the target ⏵ release the key'],
  3704.               ['Force-activate\n(videos or small pics)', 'hold {Ctrl} ⏵ hover the target ⏵ release the key'],
  3705.             ].map($newTR)),
  3706.             $new('table', [
  3707.               ['Start zooming', 'configurable (automatic or via right-click)\nor tap {Shift} while popup is visible'],
  3708.               ['Zoom', 'mouse wheel'],
  3709.               [],
  3710.               ['Rotate', '{L} {r} for "left" or "right"'],
  3711.               ['Flip/mirror', '{h} {v} for "horizontal" or "vertical"'],
  3712.               ['Previous/next\n(in album)', 'mouse wheel, {j} {k} or {←} {→} keys'],
  3713.             ].map($newTR)),
  3714.             $new('table', [
  3715.               ['Antialiasing', '{a}'],
  3716.               ['Caption in info', '{c}'],
  3717.               ['Download', '{d}'],
  3718.               ['Fullscreen', '{f}'],
  3719.               ['Info', '{i}'],
  3720.               ['Mute', '{m}'],
  3721.               ['Night mode', '{n}'],
  3722.               ['Open in tab', '{t}'],
  3723.             ].map($newTR)),
  3724.           ]),
  3725.         ]),
  3726.         $new('li.options.stretch', [
  3727.           $newSelect('Popup shows on', 'start', {
  3728.             context: 'Right-click / \u2261 / Ctrl',
  3729.             contextMK: 'Right-click / \u2261',
  3730.             contextM: 'Right-click',
  3731.             contextK: {
  3732.               textContent: '\u2261 key',
  3733.               title: '\u2261 is the Menu key (near the right Ctrl)',
  3734.             },
  3735.             ctrl: 'Ctrl',
  3736.             auto: 'automatically',
  3737.           }),
  3738.           $new('label', ['after, sec', $newRange('delay', 'seconds', .05, 10, .05, 'number')]),
  3739.           $new('label', {title: '(if the full version of the hovered image is ...% larger)'},
  3740.             ['if larger, %', $newRange('scale', null, 0, 100, 1, 'number')]),
  3741.           $newSelect('Zoom activates on', 'zoom', {
  3742.             context: 'Right click / Shift',
  3743.             wheel: 'Wheel up / Shift',
  3744.             shift: 'Shift',
  3745.             auto: 'automatically',
  3746.           }),
  3747.           $newSelect('...and zooms to', 'fit', {
  3748.             'all': 'fit to window',
  3749.             'large': 'fit if larger',
  3750.             'no': '100%',
  3751.             '': {textContent: 'custom', title: 'Use custom scale factors'},
  3752.           }),
  3753.         ]),
  3754.         $new('li.options', [
  3755.           $new('label', ['Zoom step, %', $newRange('zoomStep', null, 100, 400, 1, 'number')]),
  3756.           $newSelect('When fully zoomed out:', 'zoomOut', {
  3757.             stay: 'stay in zoom mode',
  3758.             auto: 'stay if still hovered',
  3759.             unzoom: 'undo zoom mode',
  3760.             close: 'close popup',
  3761.           }),
  3762.           $new('label', {
  3763.             style: 'flex: 1',
  3764.             title: `
  3765.               Scale factors to use when “zooms to” selector is set to “custom”.
  3766.               0 = fit to window,
  3767.               0! = same as 0 but also removes smaller values,
  3768.               * after a value marks the default zoom factor, for example: 1*
  3769.               The popup won't shrink below the image's natural size or window size for bigger mages.
  3770.               ${scalesHint}
  3771.             `.trim().replace(/\n\s+/g, '\r'),
  3772.           }, ['Custom scale factors:', $new('input#scales', {placeholder: scalesHint})]),
  3773.         ]),
  3774.         $new('li.options.row', [
  3775.           $new([
  3776.             $newCheck('Centered*', 'center',
  3777.               '...or try to keep the original link/thumbnail unobscured by the popup'),
  3778.             $newCheck('Preload on hover*', 'preload',
  3779.               'Provides smoother experience but increases network traffic'),
  3780.             $newCheck('Require Ctrl key for video', 'videoCtrl'),
  3781.             $newCheck('Mute videos*', 'mute', 'Hotkey: "m" in the popup'),
  3782.             $newCheck('Keep playing video*', 'keepVids',
  3783.               '...until you press Esc key or click elsewhere'),
  3784.             $newCheck('Keep preview on blur*', 'keepOnBlur',
  3785.               'i.e. when mouse pointer moves outside the page'),
  3786.           ]),
  3787.           $new([
  3788.             $newCheck('Wait for complete image*', 'waitLoad',
  3789.               '...or immediately show a partial image while still loading'),
  3790.             $new('div.flex', {style: 'align-items:center'}, [
  3791.               $newCheck('Info: show for', 'uiInfo', 'Hotkey: "i" (or hold "Shift") in the popup'),
  3792.               $new('input#uiInfoHide', {min: 1, step: 'any', type: 'number'}),
  3793.               'sec',
  3794.             ]),
  3795.             $newCheck('Info: only once*', 'uiInfoOnce', '...or every time the info changes'),
  3796.             $newCheck('Info: caption*', 'uiInfoCaption', 'Hotkey: "c" in the popup'),
  3797.             $newCheck('Fade-in transition', 'uiFadein'),
  3798.             $newCheck('Fade-in transition in gallery', 'uiFadeinGallery'),
  3799.           ]),
  3800.           $new([
  3801.             $newCheck('Night mode*', 'night', 'Hotkey: "n" in the popup'),
  3802.             $newCheck('Run in image tabs', 'imgtab'),
  3803.             $newCheck('Spoof hotlinking*', 'xhr',
  3804.               'Disable only if you spoof the HTTP headers yourself'),
  3805.             $newCheck('Set status on <html>*', 'globalStatus',
  3806.               "Causes slowdowns so don't enable unless you explicitly use it in your custom CSS"),
  3807.             $newCheck('Auto-start switch in menu*', 'startAltShown',
  3808.               "Show a switch for 'auto-start' mode in userscript manager menu"),
  3809.           ]),
  3810.         ]),
  3811.         $new('li.options.stretch', [
  3812.           $new('label', [
  3813.             'Background',
  3814.             $new('span', [
  3815.               $new('input#uiBackgroundColor', {type: 'color'}), $new('u'),
  3816.               $newRange('uiBackgroundOpacity', 'Opacity: $%'),
  3817.             ]),
  3818.           ]),
  3819.           $new('label', [
  3820.             'Border color, opacity, size',
  3821.             $new('span', [
  3822.               $new('input#uiBorderColor', {type: 'color'}), $new('u'),
  3823.               $newRange('uiBorderOpacity', 'Opacity: $%'),
  3824.               $newRange('uiBorder', 'Border size: $px', 0, 20),
  3825.             ]),
  3826.           ]),
  3827.           $new('label', [
  3828.             'Shadow color, opacity, size',
  3829.             $new('span', [
  3830.               $new('input#uiShadowColor', {type: 'color'}), $new('u'),
  3831.               $newRange('uiShadowOpacity', 'Opacity: $%'),
  3832.               $newRange('uiShadow', 'Shadow blur radius: $px\n"0" disables the shadow.', 0, 20),
  3833.             ]),
  3834.           ]),
  3835.           $new('label', ['Padding', $new('span', $newRange('uiPadding', 'Padding: $px'))]),
  3836.           $new('label', ['Margin', $new('span', $newRange('uiMargin', 'Margin: $px'))]),
  3837.         ]),
  3838.         $new('li', [
  3839.           $newLink('Custom CSS:', `${MPIV_BASE_URL}Custom-CSS`),
  3840.           ' e.g. ', $new('b', '#mpiv-popup { animation: none !important }'),
  3841.           $newLink('View the built-in CSS', '', {
  3842.             id: '_reveal',
  3843.             tabIndex: 0,
  3844.             style: 'float: right',
  3845.             title: 'You can copy parts of it to override them in your custom CSS',
  3846.           }),
  3847.           $new('.column', [
  3848.             $new('textarea#css', {spellcheck: false}),
  3849.             $new('textarea#_cssApp', {spellcheck: false, hidden: true, readOnly: true, rows: 30}),
  3850.           ]),
  3851.         ]),
  3852.         $new('li.flex', {style: 'justify-content: space-between;'}, [
  3853.           $new('div',
  3854.             $newLink('Custom host rules:', `${MPIV_BASE_URL}Custom-host-rules`)),
  3855.           $new('div', {style: 'white-space: pre-line'}, [
  3856.             'To disable, put any symbol except ', $new('code', 'a..z 0..9 - .'),
  3857.             '\nin "d" value, for example ', $new('code', '"d": "!foo.com"'),
  3858.           ]),
  3859.           $new('div',
  3860.             $new('input#_search',
  3861.               {type: 'search', placeholder: 'Search', style: 'width: 10em; margin-left: 1em'})),
  3862.         ]),
  3863.         $new('li', {
  3864.           style: 'margin-left: -3px; margin-right: -3px; overflow-y: auto; ' +
  3865.                  'padding-left: 3px; padding-right: 3px;',
  3866.         }, [
  3867.           $new('div#_rules.column',
  3868.             $new('textarea', {spellcheck: false, rows: 1})),
  3869.         ]),
  3870.         $new('li#_rules2'),
  3871.       ]),
  3872.       $new('div.flex', [
  3873.         $new('button#_ok', {accessKey: 'o'}, 'OK'),
  3874.         $new('button#_apply', {accessKey: 'a'}, 'Apply'),
  3875.         $new('button#_cancel', 'Cancel'),
  3876.         $new('a', {href: `${MPIV_BASE_URL}Rules`, style: 'margin: 0 auto'},
  3877.           $new('button#_install', {style: 'color: inherit'}, 'Find rule...')),
  3878.         $new('button#_import', 'Import'),
  3879.         $new('button#_export', {style: 'margin: 0'}, 'Export'),
  3880.         $new('div#_exportNotification', {hidden: true}, 'Copied to clipboard'),
  3881.       ]),
  3882.     ]),
  3883.   ];
  3884. }
  3885.  
  3886. function createGlobalStyle() {
  3887.   App.globalStyle = /*language=CSS*/ (String.raw`
  3888. #\mpiv-bar {
  3889.   position: fixed;
  3890.   z-index: 2147483647;
  3891.   top: 0;
  3892.   left: 0;
  3893.   right: 0;
  3894.   text-align: center;
  3895.   font-family: sans-serif;
  3896.   font-size: 15px;
  3897.   font-weight: bold;
  3898.   background: #0005;
  3899.   color: white;
  3900.   padding: 4px 10px;
  3901.   text-shadow: .5px .5px 2px #000;
  3902.   transition: opacity 1s ease .25s;
  3903.   opacity: 0;
  3904. }
  3905. #\mpiv-bar[data-force] {
  3906.   transition: none;
  3907. }
  3908. #\mpiv-bar.\mpiv-show {
  3909.   opacity: 1;
  3910. }
  3911. #\mpiv-bar[data-zoom][data-prefix]::before {
  3912.   content: "[" attr(data-prefix) "] ";
  3913.   color: gold;
  3914. }
  3915. #\mpiv-bar[data-zoom]:not(:empty)::after {
  3916.   content: " (" attr(data-zoom) ")";
  3917.   opacity: .8;
  3918. }
  3919. #\mpiv-bar[data-zoom]:empty::after {
  3920.   content: attr(data-zoom);
  3921. }
  3922. #\mpiv-popup.\mpiv-show {
  3923.   display: inline;
  3924. }
  3925. #\mpiv-popup {
  3926.   display: none;
  3927.   cursor: none;
  3928. ${cfg.uiFadein ? String.raw`
  3929.   animation: .2s \mpiv-fadein both;
  3930.   transition: box-shadow .25s, background-color .25s;
  3931.   ` : ''}
  3932. ${App.popupStyleBase = `
  3933.   border: none;
  3934.   box-sizing: border-box;
  3935.   background-size: cover;
  3936.   position: fixed;
  3937.   z-index: 2147483647;
  3938.   padding: 0;
  3939.   margin: 0;
  3940.   top: 0;
  3941.   left: 0;
  3942.   width: auto;
  3943.   height: auto;
  3944.   transform-origin: center;
  3945.   max-width: none;
  3946.   max-height: none;
  3947. `}
  3948. }
  3949. #\mpiv-popup.\mpiv-show {
  3950.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3951.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3952.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3953.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3954. }
  3955. #\mpiv-popup.\mpiv-show[loaded] {
  3956.   background-color: ${Util.color('Background')};
  3957.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3958. }
  3959. #\mpiv-popup[data-gallery-flip] {
  3960.   animation: none;
  3961.   transition: none;
  3962. }
  3963. #\mpiv-popup[${NOAA_ATTR}],
  3964. #\mpiv-popup.\mpiv-zoom-max {
  3965.   image-rendering: pixelated;
  3966. }
  3967. #\mpiv-popup.\mpiv-night:not(#\\0) {
  3968.   box-shadow: 0 0 0 9999px #000;
  3969. }
  3970. body:has(#\mpiv-popup.\mpiv-night)::-webkit-scrollbar {
  3971.   background: #000;
  3972. }
  3973. #\mpiv-setup {
  3974. }
  3975. @keyframes \mpiv-fadein {
  3976.   from {
  3977.     opacity: 0;
  3978.     border-color: transparent;
  3979.   }
  3980.   to {
  3981.     opacity: 1;
  3982.   }
  3983. }
  3984. ` + (cfg.globalStatus ? String.raw`
  3985. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3986.   cursor: progress !important;
  3987. }
  3988. :root.\mpiv-edge #\mpiv-popup {
  3989.   cursor: default;
  3990. }
  3991. :root.\mpiv-error *:hover {
  3992.   cursor: not-allowed !important;
  3993. }
  3994. :root.\mpiv-ready *:hover,
  3995. :root.\mpiv-large *:hover {
  3996.   cursor: zoom-in !important;
  3997. }
  3998. :root.\mpiv-shift *:hover {
  3999.   cursor: default !important;
  4000. }
  4001. ` : String.raw`
  4002. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  4003.   cursor: progress;
  4004. }
  4005. [\mpiv-status~="edge"]:hover {
  4006.   cursor: default;
  4007. }
  4008. [\mpiv-status~="error"]:hover {
  4009.   cursor: not-allowed;
  4010. }
  4011. [\mpiv-status~="ready"]:hover,
  4012. [\mpiv-status~="large"]:hover {
  4013.   cursor: zoom-in;
  4014. }
  4015. [\mpiv-status~="shift"]:hover {
  4016.   cursor: default;
  4017. }
  4018. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  4019.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  4020.   return App.globalStyle;
  4021. }
  4022.  
  4023. //#region Global utilities
  4024.  
  4025. const clamp = (v, min, max) =>
  4026.   v < min ? min : v > max ? max : v;
  4027.  
  4028. const compareNumbers = (a, b) =>
  4029.   a - b;
  4030.  
  4031. const flattenHtml = str =>
  4032.   str.trim().replace(/\n\s*/g, '');
  4033.  
  4034. const dropEvent = e =>
  4035.   (e.preventDefault(), e.stopPropagation());
  4036.  
  4037. const ensureArray = v =>
  4038.   isArray(v) ? v : [v];
  4039.  
  4040. /** @param {KeyboardEvent} e */
  4041. const eventModifiers = e =>
  4042.   (e.altKey ? '!' : '') +
  4043.   (e.ctrlKey ? '^' : '') +
  4044.   (e.metaKey ? '#' : '') +
  4045.   (e.shiftKey ? '+' : '');
  4046.  
  4047. /** @param {KeyboardEvent} e */
  4048. const describeKey = e => eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  4049.  
  4050. const isFunction = val => typeof val === 'function';
  4051.  
  4052. const isVideo = el => el && el.tagName === 'VIDEO';
  4053.  
  4054. const now = performance.now.bind(performance);
  4055.  
  4056. const sumProps = (...props) => {
  4057.   let sum = 0;
  4058.   for (const p of props)
  4059.     sum += parseFloat(p) || 0;
  4060.   return sum;
  4061. };
  4062.  
  4063. const tryCatch = (fn, ...args) => {
  4064.   try {
  4065.     return fn(...args);
  4066.   } catch (e) {}
  4067. };
  4068.  
  4069. const tryJSON = str =>
  4070.   tryCatch(JSON.parse, str);
  4071.  
  4072. const pick = (obj, path, fn) => {
  4073.   if (obj && path)
  4074.     for (const p of path.split('.'))
  4075.       if (obj) obj = obj[p]; else break;
  4076.   return fn && obj !== undefined ? fn(obj) : obj;
  4077. };
  4078.  
  4079. const $ = (sel, node = doc) =>
  4080.   node.querySelector(sel) || false;
  4081.  
  4082. const $$ = (sel, node = doc) =>
  4083.   node.querySelectorAll(sel);
  4084.  
  4085. const $new = (sel, props, children) => {
  4086.   if (typeof sel !== 'string') {
  4087.     children = props;
  4088.     props = sel;
  4089.     sel = '';
  4090.   }
  4091.   if (!children && props != null && ({}).toString.call(props) !== '[object Object]') {
  4092.     children = props;
  4093.     props = null;
  4094.   }
  4095.   const isFrag = sel === 'fragment';
  4096.   const [, tag, id, cls] = sel.match(/^(\w*)(?:#([^.]+))?(?:\.(.+))?$/);
  4097.   const el = isFrag ? doc.createDocumentFragment() : doc.createElement(tag || 'div');
  4098.   if (id) el.id = id;
  4099.   if (cls) el.className = cls.replace(/\./g, ' ');
  4100.   if (props) {
  4101.     for (const [k, v] of Object.entries(props)) {
  4102.       if (!k.startsWith('data-')) {
  4103.         el[k] = v;
  4104.       } else if (v != null) {
  4105.         el.setAttribute(k, v);
  4106.       }
  4107.     }
  4108.   }
  4109.   if (children != null) {
  4110.     if (isArray(children))
  4111.       el.append(...children.filter(Boolean));
  4112.     else if (children instanceof Node)
  4113.       el.appendChild(children);
  4114.     else
  4115.       el.textContent = children;
  4116.   }
  4117.   return el;
  4118. };
  4119.  
  4120. const $css = (el, props) =>
  4121.   Object.entries(props).forEach(([k, v]) =>
  4122.     el.style.setProperty(k, v, 'important'));
  4123.  
  4124. const $parseHtml = str =>
  4125.   new DOMParser().parseFromString(str, 'text/html');
  4126.  
  4127. const $many = (q, doc) => {
  4128.   for (const selector of ensureArray(q)) {
  4129.     const el = selector && $(selector, doc);
  4130.     if (el)
  4131.       return el;
  4132.   }
  4133. };
  4134.  
  4135. const $prop = (sel, prop, node = doc) =>
  4136.   (node = $(sel, node)) && node[prop] || '';
  4137.  
  4138. const $propUp = (node, prop) =>
  4139.   (node = node.closest(`[${prop}]`)) &&
  4140.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  4141.   '';
  4142.  
  4143. const $remove = node =>
  4144.   node && node.remove();
  4145.  
  4146. const $dataset = ({dataset: d}, key, val) =>
  4147.   val == null ? delete d[key] : (d[key] = val);
  4148.  
  4149. //#endregion
  4150. //#region Init
  4151.  
  4152. (async () => {
  4153.   cfg = await Config.load({save: true});
  4154.   if (!doc.body) {
  4155.     await new Promise(resolve =>
  4156.       new MutationObserver((_, mo) => doc.body && (mo.disconnect(), resolve()))
  4157.         .observe(document, {subtree: true, childList: true}));
  4158.   }
  4159.   const el = doc.body.firstElementChild;
  4160.   if (el) {
  4161.     App.isImageTab = el === doc.body.lastElementChild && el.matches('img, video');
  4162.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  4163.   }
  4164.   if (Menu) Menu.register();
  4165.   addEventListener('mouseover', Events.onMouseOver, true);
  4166.   addEventListener('contextmenu', Events.onContext, true);
  4167.   addEventListener('keydown', Events.onKeyDown, true);
  4168.   addEventListener('visibilitychange', Events.onVisibility, true);
  4169.   addEventListener('blur', Events.onVisibility, true);
  4170.   if (['gf.qytechs.cn', 'github.com'].includes(hostname))
  4171.     addEventListener('click', setupClickedRule, true);
  4172.   addEventListener('message', App.onMessage, true);
  4173. })();
  4174.  
  4175. if (window.trustedTypes) {
  4176.   const TT = window.trustedTypes;
  4177.   const CP = 'createPolicy';
  4178.   const createPolicy = TT[CP];
  4179.   TT[CP] = function ovr(name, opts) {
  4180.     let fn;
  4181.     const p = createPolicy.call(TT, name, opts);
  4182.     if ((trustedHTML || opts[fn = 'createHTML'] && (trustedHTML = p[fn].bind(p))) &&
  4183.         (trustedScript || opts[fn = 'createScript'] && (trustedScript = p[fn].bind(p))) &&
  4184.         TT[CP] === ovr)
  4185.       delete TT[CP];
  4186.     return p;
  4187.   };
  4188. }
  4189.  
  4190. //#endregion

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