☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2024-05-12 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     1.2.47
  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 isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  74. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  75. const isFF = CSS.supports('-moz-appearance', 'none');
  76. const AudioContext = window.AudioContext || function () {};
  77. const {from: arrayFrom, isArray} = Array;
  78.  
  79. const PREFIX = 'mpiv-';
  80. const NOAA_ATTR = 'data-no-aa';
  81. const STATUS_ATTR = `${PREFIX}status`;
  82. const MSG = Object.assign({}, ...[
  83.   'getViewSize',
  84.   'viewSize',
  85. ].map(k => ({[k]: `${PREFIX}${k}`})));
  86. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  87. // time for volatile things to settle down meanwhile we postpone action
  88. // examples: loading image from cache, quickly moving mouse over one element to another
  89. const SETTLE_TIME = 50;
  90. // used to detect JS code in host rules
  91. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  92. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  93. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  94. const ZOOM_MAX = 16;
  95. const SYM_U = Symbol('u');
  96. const FN_ARGS = {
  97.   s: ['m', 'node', 'rule'],
  98.   c: ['text', 'doc', 'node', 'rule'],
  99.   q: ['text', 'doc', 'node', 'rule'],
  100.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  101. };
  102. let trustedHTML, trustedScript;
  103. //#endregion
  104. //#region GM4 polyfill
  105.  
  106. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  107.   this.GM = {__proto__: null, info: GM_info};
  108. if (!GM.getValue)
  109.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  110. if (!GM.setValue)
  111.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  112. if (!GM.openInTab)
  113.   GM.openInTab = GM_openInTab;
  114. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  115.   GM.registerMenuCommand = GM_registerMenuCommand;
  116. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  117.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  118. if (!GM.setClipboard)
  119.   GM.setClipboard = GM_setClipboard;
  120. if (!GM.xmlHttpRequest)
  121.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  122.  
  123. //#endregion
  124.  
  125. const App = {
  126.  
  127.   isEnabled: true,
  128.   isImageTab: false,
  129.   globalStyle: '',
  130.   popupStyleBase: '',
  131.   tabfix: /\.(dumpoir|greatfon|picuki)\.com$/.test(dotDomain),
  132.   NOP: /\.(facebook|instagram|chrome|google)\.com$/.test(dotDomain) &&
  133.     (() => {}),
  134.  
  135.   activate(info, event) {
  136.     const {match, node, rule, url} = info;
  137.     const auto = cfg.start === 'auto';
  138.     const vidCtrl = cfg.videoCtrl && isVideo(node);
  139.     if (elSetup) console.info({node, rule, url, match});
  140.     if (auto && vidCtrl && !Events.ctrl)
  141.       return;
  142.     if (ai.node) App.deactivate();
  143.     ai = info;
  144.     ai.force = Events.ctrl;
  145.     ai.gNum = 0;
  146.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  147.     Util.suppressTooltip();
  148.     Calc.updateViewSize();
  149.     Events.ctrl = false;
  150.     Events.toggle(true);
  151.     Events.trackMouse(event);
  152.     if (ai.force && (auto || cfg.start === 'ctrl' || cfg.start === 'context')) {
  153.       App.start();
  154.     } else if (auto && !vidCtrl && !rule.manual) {
  155.       App.belate();
  156.     } else {
  157.       Status.set('ready');
  158.     }
  159.   },
  160.  
  161.   belate() {
  162.     if (cfg.preload) {
  163.       ai.preloadStart = now();
  164.       App.start();
  165.       Status.set('+preloading');
  166.       setTimeout(Status.set, cfg.delay, '-preloading');
  167.     } else {
  168.       ai.timer = setTimeout(App.start, cfg.delay);
  169.     }
  170.   },
  171.  
  172.   checkProgress({start} = {}) {
  173.     const p = ai.popup;
  174.     if (!p)
  175.       return;
  176.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  177.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  178.     if (h)
  179.       return App.canCommit(w, h);
  180.     if (start) {
  181.       clearInterval(ai.timerProgress);
  182.       ai.timerProgress = setInterval(App.checkProgress, 150);
  183.     }
  184.   },
  185.  
  186.   canCloseVid() {
  187.     return !ai || !ai.popup || !isVideo(ai.popup) || !cfg.keepVids;
  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.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  198.     if (wait > 0) {
  199.       ai.timer = setTimeout(App.checkProgress, wait);
  200.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  201.       App.handleError({type: 'error'});
  202.     } else {
  203.       App.commit();
  204.     }
  205.     return true;
  206.   },
  207.  
  208.   async commit() {
  209.     const p = ai.popup;
  210.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  211.     if (isDecoded) {
  212.       await p.decode();
  213.       if (p !== ai.popup)
  214.         return;
  215.     }
  216.     App.updateStyles();
  217.     Calc.measurePopup();
  218.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  219.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  220.     if (willMove)
  221.       Popup.move();
  222.     Bar.updateName();
  223.     Bar.updateDetails();
  224.     Status.set(!ai.popupLoaded && 'loading');
  225.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  226.                ai.nheight > p.clientHeight + ai.extras.h;
  227.     if (ai.large) {
  228.       Status.set('+large');
  229.       // prevent a blank bg+border in FF
  230.       if (isFF && p.complete && !isDecoded)
  231.         p.style.backgroundImage = `url('${p.src}')`;
  232.     }
  233.   },
  234.  
  235.   deactivate({wait} = {}) {
  236.     App.stopTimers();
  237.     if (ai.req)
  238.       tryCatch(ai.req.abort);
  239.     if (ai.tooltip)
  240.       ai.tooltip.node.title = ai.tooltip.text;
  241.     Status.set(false);
  242.     Bar.set(false);
  243.     Events.toggle(false);
  244.     Popup.destroy();
  245.     if (wait) {
  246.       App.isEnabled = false;
  247.       setTimeout(App.enable, 200);
  248.     }
  249.     ai = {rule: {}};
  250.   },
  251.  
  252.   enable() {
  253.     App.isEnabled = true;
  254.   },
  255.  
  256.   handleError(e, rule = ai.rule) {
  257.     if (rule && rule.onerror === 'skip')
  258.       return;
  259.     if (ai.imageUrl &&
  260.         !ai.xhr &&
  261.         !ai.imageUrl.startsWith(location.origin + '/') &&
  262.         location.protocol === 'https:' &&
  263.         CspSniffer.init) {
  264.       Popup.create(ai.imageUrl, ai.pageUrl, e);
  265.       return;
  266.     }
  267.     const fe = Util.formatError(e, rule);
  268.     if (!rule || !ai.urls || !ai.urls.length)
  269.       console.warn(...fe);
  270.     if (ai.urls && ai.urls.length) {
  271.       ai.url = ai.urls.shift();
  272.       if (ai.url) {
  273.         App.stopTimers();
  274.         App.startSingle();
  275.       } else {
  276.         App.deactivate();
  277.       }
  278.     } else if (ai.node) {
  279.       Status.set('error');
  280.       Bar.set(fe.message, 'error');
  281.     }
  282.   },
  283.  
  284.   /** @param {MessageEvent} e */
  285.   onMessage(e) {
  286.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  287.       e.stopImmediatePropagation();
  288.       for (const el of doc.getElementsByTagName('iframe')) {
  289.         if (el.contentWindow === e.source) {
  290.           const s = Calc.frameSize(el, window).join(':');
  291.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  292.           return;
  293.         }
  294.       }
  295.     }
  296.   },
  297.  
  298.   /** @param {MessageEvent} e */
  299.   onMessageChild(e) {
  300.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  301.       e.stopImmediatePropagation();
  302.       removeEventListener('message', App.onMessageChild, true);
  303.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  304.       if (w && h) ai.view = {w, h, x, y};
  305.     }
  306.   },
  307.  
  308.   start() {
  309.     App.updateStyles();
  310.     if (ai.gallery)
  311.       App.startGallery();
  312.     else
  313.       App.startSingle();
  314.   },
  315.  
  316.   startSingle() {
  317.     Status.loading();
  318.     ai.imageUrl = null;
  319.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  320.       Req.findRedirect();
  321.     } else if (ai.rule.q && !isArray(ai.urls)) {
  322.       App.startFromQ();
  323.     } else {
  324.       Popup.create(ai.url);
  325.       Ruler.runC();
  326.     }
  327.   },
  328.  
  329.   async startFromQ() {
  330.     try {
  331.       const {responseText, doc, finalUrl} = await Req.getDoc(ai.url);
  332.       const url = Ruler.runQ(responseText, doc, finalUrl);
  333.       if (!url)
  334.         throw 'The "q" rule did not produce any URL.';
  335.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  336.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  337.         if (!info || !info.url)
  338.           throw `Couldn't follow URL: ${url}`;
  339.         Object.assign(ai, info);
  340.         App.startSingle();
  341.       } else {
  342.         Popup.create(url, finalUrl);
  343.         Ruler.runC(responseText, doc);
  344.       }
  345.     } catch (e) {
  346.       App.handleError(e);
  347.     }
  348.   },
  349.  
  350.   async startGallery() {
  351.     Status.loading();
  352.     try {
  353.       const startUrl = ai.url;
  354.       const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
  355.       const items = await new Promise(cb => {
  356.         const res = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node, cb);
  357.         if (res !== undefined) cb(res);
  358.       });
  359.       // bail out if the gallery's async callback took too long
  360.       if (ai.url !== startUrl) return;
  361.       ai.gNum = items.length;
  362.       ai.gItems = items.length && items;
  363.       if (ai.gItems) {
  364.         const i = items.index;
  365.         ai.gIndex = i >= 0 && items[i] ? +i :
  366.           Gallery.findIndex(typeof i === 'string' ? i : ai.url);
  367.         setTimeout(Gallery.next);
  368.       } else {
  369.         throw 'Empty gallery';
  370.       }
  371.     } catch (e) {
  372.       App.handleError(e);
  373.     }
  374.   },
  375.  
  376.   stopTimers() {
  377.     for (const timer of ['timer', 'timerStatus'])
  378.       clearTimeout(ai[timer]);
  379.     clearInterval(ai.timerProgress);
  380.   },
  381.  
  382.   toggleZoom({keepScale} = {}) {
  383.     const p = ai.popup;
  384.     if (!p || !ai.scales || ai.scales.length < 2)
  385.       return;
  386.     ai.zoomed = !ai.zoomed;
  387.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  388.     if (ai.zooming)
  389.       p.classList.add(`${PREFIX}zooming`);
  390.     Popup.move();
  391.     Bar.updateDetails();
  392.     Status.set(ai.zoomed ? 'zoom' : false);
  393.     return ai.zoomed;
  394.   },
  395.  
  396.   updateStyles() {
  397.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  398.     Util.addStyle('rule', ai.rule.css || '');
  399.   },
  400. };
  401.  
  402. const Bar = {
  403.  
  404.   set(label, className) {
  405.     let b = ai.bar;
  406.     if (typeof label !== 'string') {
  407.       $remove(b);
  408.       ai.bar = null;
  409.       return;
  410.     }
  411.     const force = !b && 0;
  412.     if (!b) b = ai.bar = $new('div', {id: `${PREFIX}bar`, className: `${PREFIX}${className}`});
  413.     App.updateStyles();
  414.     Bar.updateDetails();
  415.     setTimeout(Bar.show, 0, force);
  416.     if (/<([a-z][-a-z]*)[^<>]*>[^<>]*<\/\1\s*>/i.test(label)) { // checking for <tag...>...</tag>
  417.       b.innerHTML = trustedHTML ? trustedHTML(label) : label;
  418.     } else {
  419.       b.textContent = label;
  420.     }
  421.     if (!b.parentNode) {
  422.       doc.body.appendChild(b);
  423.       Util.forceLayout(b);
  424.     }
  425.   },
  426.  
  427.   show(force) {
  428.     const b = ai.bar;
  429.     if (!force && (!cfg.uiInfo || force !== 0 && cfg.uiInfoOnce) || Util.elShown(b))
  430.       return;
  431.     clearTimeout(ai.timerBar);
  432.     b.classList.add(PREFIX + 'show');
  433.     $dataset(b, 'force', force === 2 ? '' : null);
  434.     ai.timerBar = !force && setTimeout(Bar.hide, cfg.uiInfoHide * 1000);
  435.   },
  436.  
  437.   hide(force) {
  438.     const b = ai.bar;
  439.     if (!b || !force && (!cfg.uiInfo || b.dataset.force) || !Util.elShown(b))
  440.       return;
  441.     $dataset(b, 'force', force === 2 ? '' : null);
  442.     b.classList.remove(PREFIX + 'show');
  443.   },
  444.  
  445.   updateName() {
  446.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  447.     if (gi) {
  448.       const item = gi[i];
  449.       const noDesc = !gi.some(_ => _.desc);
  450.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  451.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  452.         item.desc,
  453.       ].filter(Boolean).join(' - ')}`;
  454.       Bar.set(c.trim() || ' ', 'gallery', true);
  455.     } else if ('caption' in ai) {
  456.       Bar.set(ai.caption, 'caption');
  457.     } else if (ai.tooltip) {
  458.       Bar.set(ai.tooltip.text, 'tooltip');
  459.     } else {
  460.       Bar.set(' ', 'info');
  461.     }
  462.   },
  463.  
  464.   updateDetails() {
  465.     if (!ai.bar) return;
  466.     const r = ai.rotate;
  467.     const zoom = ai.nwidth && `${
  468.       Math.round(ai.scale * 100)
  469.     }%${
  470.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  471.     }${
  472.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  473.     }, ${
  474.       ai.nwidth
  475.     } x ${
  476.       ai.nheight
  477.     } px, ${
  478.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  479.     } MP, ${
  480.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  481.     }`.replace(/\x20/g, '\xA0');
  482.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  483.       $dataset(ai.bar, 'zoom', zoom || null);
  484.       Bar.show();
  485.     }
  486.   },
  487. };
  488.  
  489. const Calc = {
  490.  
  491.   aspectRatio(w, h) {
  492.     for (let rat = w / h, a, b = 0; ;) {
  493.       b++;
  494.       a = Math.round(w * b / h);
  495.       if (a > 10 && b > 10 || a > 100 || b > 100)
  496.         return rat.toFixed(2);
  497.       if (Math.abs(a / b - rat) < .01)
  498.         return `${a}:${b}`;
  499.     }
  500.   },
  501.  
  502.   frameSize(elFrame, wnd) {
  503.     if (!elFrame) return;
  504.     const r = elFrame.getBoundingClientRect();
  505.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  506.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  507.     const x = r.left < 0 ? -r.left : 0;
  508.     const y = r.top < 0 ? -r.top : 0;
  509.     return [w, h, x, y];
  510.   },
  511.  
  512.   generateScales(fit) {
  513.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  514.     const zoomStep = cfg.zoomStep / 100;
  515.     const arr = [scale];
  516.     if (fit !== 1) {
  517.       const diff = goal / scale;
  518.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  519.       const step = steps && Math.pow(diff, 1 / steps);
  520.       for (let i = steps; --i > 0;)
  521.         arr.push((scale *= step));
  522.       arr.push(scale = goal);
  523.     }
  524.     while ((scale *= zoomStep) <= ZOOM_MAX)
  525.       arr.push(scale);
  526.     return arr;
  527.   },
  528.  
  529.   measurePopup() {
  530.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  531.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  532.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  533.     if (p.clientWidth > nw) {
  534.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  535.       nh = ai.nheight = w / nw * nh | 0;
  536.       nw = ai.nwidth = w;
  537.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  538.     }
  539.     p.classList.add(`${PREFIX}show`);
  540.     p.removeAttribute('style');
  541.     const s = getComputedStyle(p);
  542.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  543.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  544.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  545.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  546.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  547.     ai.extras = {
  548.       inw, inh,
  549.       outw, outh,
  550.       o: o2 / 2,
  551.       w: inw + outw,
  552.       h: inh + outh,
  553.     };
  554.     const fit = Math.min(
  555.       (ai.view.w - ai.extras.w) / ai.nwidth,
  556.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  557.     const isCustom = !cfg.fit && cfg.scales.length;
  558.     let cutoff = Math.min(1, fit);
  559.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  560.     if (isCustom) {
  561.       const dst = [];
  562.       for (const scale of cfg.scales) {
  563.         const val = parseFloat(scale) || fit;
  564.         dst.push(val);
  565.         if (isCustom && typeof scale === 'string') {
  566.           if (scale.includes('!')) cutoff = val;
  567.           if (scale.includes('*')) scaleZoom = val;
  568.         }
  569.       }
  570.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  571.     } else {
  572.       ai.scales = Calc.generateScales(fit);
  573.     }
  574.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  575.     ai.scaleFit = fit;
  576.     ai.scaleZoom = scaleZoom;
  577.   },
  578.  
  579.   rect() {
  580.     let {node, rule} = ai;
  581.     let n = rule.rect && node.closest(rule.rect);
  582.     if (n) return n.getBoundingClientRect();
  583.     const nested = node.getElementsByTagName('*');
  584.     let maxArea = 0;
  585.     let maxBounds;
  586.     n = node;
  587.     for (let i = 0; n; n = nested[i++]) {
  588.       const bounds = n.getBoundingClientRect();
  589.       const area = bounds.width * bounds.height;
  590.       if (area > maxArea) {
  591.         maxArea = area;
  592.         maxBounds = bounds;
  593.         node = n;
  594.       }
  595.     }
  596.     return maxBounds;
  597.   },
  598.  
  599.   scaleBiggerThan(scale, i, arr) {
  600.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  601.   },
  602.  
  603.   scaleIndex(dir) {
  604.     const i = ai.scales.indexOf(ai.scale);
  605.     if (i >= 0) return i + dir;
  606.     for (
  607.       let len = ai.scales.length,
  608.         i = dir > 0 ? 0 : len - 1;
  609.       i >= 0 && i < len;
  610.       i += dir
  611.     ) {
  612.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  613.         return i;
  614.     }
  615.     return -1;
  616.   },
  617.  
  618.   scaleForFirstZoom(keepScale) {
  619.     const z = ai.scaleZoom;
  620.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  621.   },
  622.  
  623.   updateViewSize() {
  624.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  625.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  626.     if (window === top) return;
  627.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  628.     if (w && h) {
  629.       ai.view = {w, h, x: 0, y: 0};
  630.     } else {
  631.       addEventListener('message', App.onMessageChild, true);
  632.       parent.postMessage(MSG.getViewSize, '*');
  633.     }
  634.   },
  635. };
  636.  
  637. class Config {
  638.  
  639.   constructor({data: c, save}) {
  640.     if (typeof c === 'string')
  641.       c = tryJSON(c);
  642.     if (typeof c !== 'object' || !c)
  643.       c = {};
  644.     const {DEFAULTS} = Config;
  645.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  646.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  647.         '';
  648.     if (c.version !== DEFAULTS.version) {
  649.       if (typeof c.hosts === 'string')
  650.         c.hosts = c.hosts.split('\n')
  651.           .map(s => tryJSON(s) || s)
  652.           .filter(Boolean);
  653.       if (c.close === true || c.close === false)
  654.         c.zoomOut = c.close ? 'auto' : 'stay';
  655.       for (const key in DEFAULTS)
  656.         if (typeof c[key] !== typeof DEFAULTS[key])
  657.           c[key] = DEFAULTS[key];
  658.       if (c.version === 3 && c.scales[0] === 0)
  659.         c.scales[0] = '0!';
  660.       for (const key in c)
  661.         if (!(key in DEFAULTS))
  662.           delete c[key];
  663.       c.version = DEFAULTS.version;
  664.       if (save)
  665.         GM.setValue('cfg', c);
  666.     }
  667.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  668.       App.globalStyle = '';
  669.     if (!isArray(c.scales))
  670.       c.scales = [];
  671.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  672.     Object.assign(this, DEFAULTS, c);
  673.   }
  674.  
  675.   static async load(opts) {
  676.     opts.data = await GM.getValue('cfg');
  677.     return new Config(opts);
  678.   }
  679.  
  680.   _getCss() {
  681.     const {css} = this;
  682.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  683.   }
  684. }
  685.  
  686. Config.DEFAULTS = /** @type mpiv.Config */ {
  687.   __proto__: null,
  688.   center: false,
  689.   css: '',
  690.   delay: 500,
  691.   fit: '',
  692.   globalStatus: false,
  693.   // prefer ' inside rules because " will be displayed as \"
  694.   // example: "img[src*='icon']"
  695.   hosts: [{
  696.     name: 'No popup for YouTube thumbnails',
  697.     d: 'www.youtube.com',
  698.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  699.     s: '',
  700.   }, {
  701.     name: 'No popup for SVG/PNG icons',
  702.     d: '',
  703.     e: "img[src*='icon']",
  704.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  705.     s: '',
  706.   }],
  707.   imgtab: false,
  708.   keepOnBlur: false,
  709.   keepVids: false,
  710.   mute: false,
  711.   night: false,
  712.   preload: false,
  713.   scale: 1.05,
  714.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  715.   start: 'auto',
  716.   startAlt: 'context',
  717.   startAltShown: false,
  718.   uiBackgroundColor: '#ffffff',
  719.   uiBackgroundOpacity: 100,
  720.   uiBorderColor: '#000000',
  721.   uiBorderOpacity: 100,
  722.   uiBorder: 0,
  723.   uiFadein: true,
  724.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  725.   uiInfo: true,
  726.   uiInfoHide: 3,
  727.   uiInfoOnce: true,
  728.   uiShadowColor: '#000000',
  729.   uiShadowOpacity: 80,
  730.   uiShadow: 20,
  731.   uiPadding: 0,
  732.   uiMargin: 0,
  733.   version: 6,
  734.   videoCtrl: true,
  735.   waitLoad: false,
  736.   xhr: true,
  737.   zoom: 'context',
  738.   zoomOut: 'auto',
  739.   zoomStep: 133,
  740. };
  741.  
  742. const CspSniffer = {
  743.  
  744.   /** @type {?Object<string,string[]>} */
  745.   csp: null,
  746.   selfUrl: location.origin + '/',
  747.  
  748.   // will be null when done
  749.   init() {
  750.     this.busy = new Promise(resolve => {
  751.       const xhr = new XMLHttpRequest();
  752.       xhr.open('get', location);
  753.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  754.       xhr.onreadystatechange = () => {
  755.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  756.           this.csp = this._parse([
  757.             xhr.getResponseHeader('content-security-policy'),
  758.             $prop('meta[http-equiv="Content-Security-Policy"]', 'content'),
  759.           ].filter(Boolean).join(','));
  760.           this.init = this.busy = xhr.onreadystatechange = null;
  761.           xhr.abort();
  762.           resolve();
  763.         }
  764.       };
  765.       xhr.send();
  766.     });
  767.   },
  768.  
  769.   async check(url, allowInit) {
  770.     if (allowInit && this.init) this.init();
  771.     if (this.busy) await this.busy;
  772.     const isVideo = Util.isVideoUrl(url);
  773.     let mode;
  774.     if (this.csp) {
  775.       const src = this.csp[isVideo ? 'media' : 'img'];
  776.       if (!src.some(this._srcMatches, url))
  777.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  778.     }
  779.     return [mode || ai.xhr, isVideo];
  780.   },
  781.  
  782.   _parse(csp) {
  783.     if (!csp) return;
  784.     const src = {};
  785.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  786.     for (let m; (m = rx.exec(csp));)
  787.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  788.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  789.       nonce = RegExp.$1;
  790.     if ((src.trusted || []).includes("'script'"))
  791.       App.NOP = () => {};
  792.     if (!src.img) src.img = src.default || [];
  793.     if (!src.media) src.media = src.default || [];
  794.     for (const set of [src.img, src.media]) {
  795.       set.forEach((item, i) => {
  796.         if (item !== '*' && item.includes('*')) {
  797.           set[i] = new RegExp(
  798.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  799.             item
  800.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  801.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  802.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  803.             .replace(/[^/]$/, '$&/'));
  804.         }
  805.       });
  806.     }
  807.     return src;
  808.   },
  809.  
  810.   /** @this string */
  811.   _srcMatches(src) {
  812.     return src instanceof RegExp ? src.test(this) :
  813.       src === '*' ||
  814.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  815.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  816.   },
  817. };
  818.  
  819. const Events = {
  820.  
  821.   ctrl: false,
  822.   hoverData: null,
  823.   hoverTimer: 0,
  824.   ignoreKeyHeld: false,
  825.  
  826.   onMouseOver(e) {
  827.     let node = e.target;
  828.     Events.ignoreKeyHeld = e.shiftKey;
  829.     if (!App.isEnabled ||
  830.         !App.canCloseVid() ||
  831.         e.shiftKey ||
  832.         ai.zoomed ||
  833.         node === ai.popup ||
  834.         node === doc.body ||
  835.         node === doc.documentElement ||
  836.         node === elSetup ||
  837.         ai.gallery && ai.rectHovered)
  838.       return;
  839.     if (node.shadowRoot)
  840.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  841.     // we don't want to process everything in the path of a quickly moving mouse cursor
  842.     Events.hoverData = {e, node, start: now()};
  843.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  844.     node.addEventListener('mouseout', Events.onMouseOutThrottled);
  845.   },
  846.  
  847.   onMouseOverThrottled(force) {
  848.     const {start, e, node, nodeOut} = Events.hoverData || {};
  849.     if (!node || node === nodeOut && (Events.hoverData = null, 1))
  850.       return;
  851.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  852.     const wait = force ? 0 : start + SETTLE_TIME - now();
  853.     const t = Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  854.     if (t)
  855.       return;
  856.     Events.hoverData = null;
  857.     if (!Ruler.rules)
  858.       Ruler.init();
  859.     const info = RuleMatcher.adaptiveFind(node);
  860.     if (info && info.url && info.node !== ai.node)
  861.       App.activate(info, e);
  862.   },
  863.  
  864.   onMouseOut(e) {
  865.     if (!e.relatedTarget && !cfg.keepOnBlur && !e.shiftKey && App.canCloseVid())
  866.       App.deactivate();
  867.   },
  868.  
  869.   onMouseOutThrottled(e) {
  870.     const d = Events.hoverData;
  871.     if (d) d.nodeOut = this;
  872.     this.removeEventListener('mouseout', Events.onMouseOutThrottled);
  873.     Events.hoverTimer = 0;
  874.   },
  875.  
  876.   onMouseOutShadow(e) {
  877.     const root = e.target.shadowRoot;
  878.     if (root) {
  879.       root.removeEventListener('mouseover', Events.onMouseOver);
  880.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  881.     }
  882.   },
  883.  
  884.   onMouseMove(e) {
  885.     Events.trackMouse(e);
  886.     if (e.shiftKey)
  887.       return;
  888.     if (!ai.zoomed && !ai.rectHovered && App.canCloseVid()) {
  889.       App.deactivate();
  890.     } else if (ai.zoomed) {
  891.       Popup.move();
  892.       const {cx, cy, view: {w, h}} = ai;
  893.       const bx = w / 6;
  894.       const by = h / 6;
  895.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  896.       Status.set(`${onEdge ? '+' : '-'}edge`);
  897.     }
  898.   },
  899.  
  900.   onMouseDown({shiftKey, button, target}) {
  901.     if (!button && target === ai.popup && ai.popup.controls && (shiftKey || !App.canCloseVid())) {
  902.       ai.controlled = ai.zoomed = true;
  903.     } else if (button === 2 || shiftKey) {
  904.       // Shift = ignore; RMB will be processed in onContext
  905.     } else {
  906.       App.deactivate({wait: true});
  907.       doc.addEventListener('mouseup', App.enable, {once: true});
  908.     }
  909.   },
  910.  
  911.   onMouseScroll(e) {
  912.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  913.     if (ai.zoomed) {
  914.       Events.zoomInOut(dir);
  915.     } else if (ai.gNum > 1 && ai.popup) {
  916.       Gallery.next(-dir);
  917.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  918.       App.toggleZoom();
  919.     } else if (App.canCloseVid()) {
  920.       App.deactivate();
  921.       return;
  922.     }
  923.     dropEvent(e);
  924.   },
  925.  
  926.   onKeyDown(e) {
  927.     // Synthesized events may be of the wrong type and not have a `key`
  928.     const key = describeKey(e);
  929.     const p = ai.popup;
  930.     if (!p && key === '^Control') {
  931.       addEventListener('keyup', Events.onKeyUp, true);
  932.       Events.ctrl = true;
  933.     }
  934.     if (!p && key === '^ContextMenu')
  935.       return Events.onContext.call(this, e);
  936.     if (!p || e.repeat)
  937.       return;
  938.     switch (key) {
  939.       case '+Shift':
  940.         if (ai.shiftKeyTime)
  941.           return;
  942.         ai.shiftKeyTime = now();
  943.         Status.set('+shift');
  944.         if (cfg.uiInfo)
  945.           Bar.show(1);
  946.         if (isVideo(p))
  947.           p.controls = true;
  948.         return;
  949.       case 'KeyA':
  950.         p.toggleAttribute(NOAA_ATTR);
  951.         break;
  952.       case 'ArrowRight':
  953.       case 'KeyJ':
  954.         Gallery.next(1);
  955.         break;
  956.       case 'ArrowLeft':
  957.       case 'KeyK':
  958.         Gallery.next(-1);
  959.         break;
  960.       case 'KeyD':
  961.         Req.saveFile();
  962.         break;
  963.       case 'KeyH': // flip horizontally
  964.       case 'KeyV': // flip vertically
  965.       case 'KeyL': // rotate left
  966.       case 'KeyR': // rotate right
  967.         if (!p)
  968.           return;
  969.         if (key === 'KeyH' || key === 'KeyV') {
  970.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  971.           ai[side] = !ai[side];
  972.         } else {
  973.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  974.         }
  975.         Bar.updateDetails();
  976.         Popup.move();
  977.         break;
  978.       case 'KeyI':
  979.         (Util.elShown(ai.bar) ? Bar.hide : Bar.show)(2);
  980.         break;
  981.       case 'KeyM':
  982.         if (isVideo(p))
  983.           p.muted = !p.muted;
  984.         break;
  985.       case 'KeyN':
  986.         ai.night = p.classList.toggle('mpiv-night');
  987.         break;
  988.       case 'KeyT':
  989.         GM.openInTab(Util.tabFixUrl() || p.src);
  990.         App.deactivate();
  991.         break;
  992.       case 'Minus':
  993.       case 'NumpadSubtract':
  994.         if (ai.zoomed) {
  995.           Events.zoomInOut(-1);
  996.         } else {
  997.           App.toggleZoom();
  998.         }
  999.         break;
  1000.       case 'Equal':
  1001.       case 'NumpadAdd':
  1002.         if (ai.zoomed) {
  1003.           Events.zoomInOut(1);
  1004.         } else {
  1005.           App.toggleZoom();
  1006.         }
  1007.         break;
  1008.       case 'Escape':
  1009.         App.deactivate({wait: true});
  1010.         break;
  1011.       case '!Alt':
  1012.         return;
  1013.       default:
  1014.         App.deactivate({wait: true});
  1015.         return;
  1016.     }
  1017.     dropEvent(e);
  1018.   },
  1019.  
  1020.   onKeyUp(e) {
  1021.     const p = ai.popup || false;
  1022.     if (e.key === 'Control') {
  1023.       if (!p) removeEventListener('keyup', Events.onKeyUp, true);
  1024.       setTimeout(() => (Events.ctrl = false));
  1025.     }
  1026.     if (p && e.key === 'Shift' && ai.shiftKeyTime) {
  1027.       Status.set('-shift');
  1028.       if (cfg.uiInfo)
  1029.         Bar.hide(1);
  1030.       if (p.controls)
  1031.         p.controls = false;
  1032.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1033.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1034.         ai.controlled = false;
  1035.       else if (p && (ai.zoomed || ai.rectHovered !== false))
  1036.         App.toggleZoom();
  1037.       else
  1038.         App.deactivate({wait: true});
  1039.       ai.shiftKeyTime = 0;
  1040.     } else if (
  1041.       describeKey(e) === 'Control' && !p && !Events.ignoreKeyHeld &&
  1042.       (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)
  1043.     ) {
  1044.       dropEvent(e);
  1045.       if (Events.hoverData) {
  1046.         Events.hoverData.e = e;
  1047.         Events.onMouseOverThrottled(true);
  1048.       }
  1049.       if (ai.node) {
  1050.         ai.force = true;
  1051.         App.start();
  1052.       }
  1053.     }
  1054.   },
  1055.  
  1056.   onContext(e) {
  1057.     if (Events.ignoreKeyHeld)
  1058.       return;
  1059.     const p = ai.popup;
  1060.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1061.       dropEvent(e);
  1062.     } else if (!p && (!cfg.videoCtrl || !isVideo(ai.node) || Events.ctrl) && (
  1063.       cfg.start === 'context' ||
  1064.       cfg.start === 'contextMK' ||
  1065.       cfg.start === 'contextM' && (e.button === 2) ||
  1066.       cfg.start === 'contextK' && (e.button !== 2) ||
  1067.       (cfg.start === 'auto' && ai.rule.manual)
  1068.     )) {
  1069.       // right-clicked on an image while the context menu is shown for something else
  1070.       if (!ai.node && !Events.hoverData)
  1071.         Events.onMouseOver(e);
  1072.       Events.onMouseOverThrottled(true);
  1073.       if (ai.node) {
  1074.         ai.force = true;
  1075.         App.start();
  1076.         dropEvent(e);
  1077.       }
  1078.     } else if (p) {
  1079.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1080.     }
  1081.   },
  1082.  
  1083.   onVisibility(e) {
  1084.     Events.ctrl = false;
  1085.   },
  1086.  
  1087.   pierceShadow(node, x, y) {
  1088.     for (let root; (root = node.shadowRoot);) {
  1089.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1090.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1091.       const inner = root.elementFromPoint(x, y);
  1092.       if (!inner || inner === node)
  1093.         break;
  1094.       node = inner;
  1095.     }
  1096.     return node;
  1097.   },
  1098.  
  1099.   toggle(enable) {
  1100.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1101.     const passive = {passive: true, capture: true};
  1102.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1103.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1104.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1105.     window[onOff]('keyup', Events.onKeyUp, true);
  1106.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false, capture: true});
  1107.     ai.node.removeEventListener('mouseout', Events.onMouseOutThrottled);
  1108.   },
  1109.  
  1110.   trackMouse(e) {
  1111.     const cx = ai.cx = e.clientX;
  1112.     const cy = ai.cy = e.clientY;
  1113.     const r = ai.rect || (ai.rect = Calc.rect());
  1114.     ai.rectHovered =
  1115.       cx > r.left - 2 && cx < r.right + 2 &&
  1116.       cy > r.top - 2 && cy < r.bottom + 2;
  1117.   },
  1118.  
  1119.   zoomInOut(dir) {
  1120.     const i = Calc.scaleIndex(dir);
  1121.     const n = ai.scales.length;
  1122.     if (i >= 0 && i < n)
  1123.       ai.scale = ai.scales[i];
  1124.     const zo = cfg.zoomOut;
  1125.     if (i <= 0 && zo !== 'stay') {
  1126.       if (ai.scaleFit < ai.scale * .99) {
  1127.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1128.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1129.         App.deactivate({wait: true});
  1130.         return;
  1131.       }
  1132.       ai.zoomed = zo !== 'unzoom';
  1133.     } else {
  1134.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1135.     }
  1136.     if (ai.zooming)
  1137.       ai.popup.classList.add(`${PREFIX}zooming`);
  1138.     Popup.move();
  1139.     Bar.updateDetails();
  1140.   },
  1141. };
  1142.  
  1143. const Gallery = {
  1144.  
  1145.   makeParser(g) {
  1146.     return isFunction(g) ? g : Gallery.defaultParser;
  1147.   },
  1148.  
  1149.   findIndex(gUrl) {
  1150.     const sel = gUrl.split('#')[1];
  1151.     if (!sel)
  1152.       return 0;
  1153.     let i = +sel;
  1154.     if (i >= 0 && i === (i | 0))
  1155.       return i;
  1156.     for (i = 0; i < ai.gNum; i++) {
  1157.       const {url} = ai.gItems[i];
  1158.       if (isArray(url)
  1159.         ? url.indexOf(sel) || url.some(u => u.indexOf(sel, u.lastIndexOf('/')) > 0)
  1160.         : url === sel || url.indexOf(sel, url.lastIndexOf('/')) > 0
  1161.       ) return i;
  1162.     }
  1163.     return 0;
  1164.   },
  1165.  
  1166.   next(dir) {
  1167.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1168.     const item = ai.gItem = ai.gItems[ai.gIndex];
  1169.     if (isArray(item.url)) {
  1170.       ai.urls = item.url.slice(1);
  1171.       ai.url = item.url[0];
  1172.     } else {
  1173.       ai.urls = null;
  1174.       ai.url = item.url;
  1175.     }
  1176.     ai.gItemNext = ai.gItems[Gallery.nextIndex(dir || 1)];
  1177.     App.startSingle();
  1178.     Bar.updateName();
  1179.     if (dir) Bar.show(0);
  1180.   },
  1181.  
  1182.   nextIndex(dir) {
  1183.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1184.   },
  1185.  
  1186.   defaultParser(text, doc, docUrl, m, rule) {
  1187.     const {g} = rule;
  1188.     const gi = g.index;
  1189.     const qEntry = g.entry;
  1190.     const qCaption = ensureArray(g.caption);
  1191.     const qImage = g.image || 'img';
  1192.     const qTitle = g.title;
  1193.     const fix =
  1194.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1195.       (s => s.trim());
  1196.     const elems = [...$$(qEntry || qImage, doc)];
  1197.     const items = elems.map(processEntry).filter(Boolean);
  1198.     items.title = processTitle();
  1199.     items.index =
  1200.       RX_HAS_CODE.test(gi) ? Util.newFunction('items', 'node', gi)(items, ai.node) :
  1201.         typeof gi === 'string' ? Req.findImageUrl(tryCatch($, gi, doc), docUrl) :
  1202.           gi == null ? Math.max(0, elems.indexOf(ai.node)) :
  1203.             gi;
  1204.     return items;
  1205.  
  1206.     function processEntry(entry) {
  1207.       const item = {};
  1208.       try {
  1209.         const img = qEntry ? $(qImage, entry) : entry;
  1210.         item.url = fix(Req.findImageUrl(img, docUrl), true);
  1211.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1212.       } catch (e) {}
  1213.       return item.url && item;
  1214.     }
  1215.     function processCaption(sel) {
  1216.       const el = !sel ? this
  1217.         : $(sel, this) ||
  1218.           $orSelf(sel, this.previousElementSibling) ||
  1219.           $orSelf(sel, this.nextElementSibling);
  1220.       return el && fix(Ruler.runCHandler.default(el) || el.textContent);
  1221.     }
  1222.     function processTitle() {
  1223.       const el = $(qTitle, doc);
  1224.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1225.     }
  1226.     function $orSelf(selector, el) {
  1227.       if (el && !el.matches(qEntry))
  1228.         return el.matches(selector) ? el : $(selector, el);
  1229.     }
  1230.   },
  1231. };
  1232.  
  1233. const Menu = window === top && GM.registerMenuCommand && {
  1234.   curAltName: '',
  1235.   unreg: GM.unregisterMenuCommand,
  1236.   makeAltName: () => Menu.unreg
  1237.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1238.     : 'MPIV: toggle auto-start',
  1239.   register() {
  1240.     GM.registerMenuCommand('MPIV: configure', setup);
  1241.     Menu.registerAlt();
  1242.   },
  1243.   registerAlt() {
  1244.     if (cfg.startAltShown) {
  1245.       Menu.curAltName = Menu.makeAltName();
  1246.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1247.     }
  1248.   },
  1249.   reRegisterAlt() {
  1250.     const old = Menu.curAltName;
  1251.     if (old && Menu.unreg) Menu.unreg(old);
  1252.     if (!old || Menu.unreg) Menu.registerAlt();
  1253.   },
  1254.   onAltToggled() {
  1255.     const wasAuto = cfg.start === 'auto';
  1256.     if (wasAuto) {
  1257.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1258.     } else {
  1259.       cfg.startAlt = cfg.start;
  1260.       cfg.start = 'auto';
  1261.     }
  1262.     Menu.reRegisterAlt();
  1263.   },
  1264. };
  1265.  
  1266. const Popup = {
  1267.  
  1268.   async create(src, pageUrl, error) {
  1269.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1270.       (ai.popup.dataset.galleryFlip = '') === '';
  1271.     Popup.destroy();
  1272.     ai.imageUrl = src;
  1273.     if (!src)
  1274.       return;
  1275.     const myAi = ai;
  1276.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1277.     if (ai !== myAi)
  1278.       return;
  1279.     if (!xhr && error) {
  1280.       App.handleError(error);
  1281.       return;
  1282.     }
  1283.     Object.assign(ai, {pageUrl, xhr});
  1284.     if (xhr)
  1285.       [src, isVideo] = await Req.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1286.     if (ai !== myAi || !src)
  1287.       return;
  1288.     const p = ai.popup = isVideo ? await PopupVideo.create() : $new('img');
  1289.     p.id = `${PREFIX}popup`;
  1290.     p.src = src;
  1291.     p.addEventListener('error', App.handleError);
  1292.     if ((ai.night = (ai.night != null ? ai.night : cfg.night)))
  1293.       p.classList.add('mpiv-night');
  1294.     if (ai.zooming)
  1295.       p.addEventListener('transitionend', Popup.onZoom);
  1296.     if (inGallery) {
  1297.       p.dataset.galleryFlip = '';
  1298.       p.setAttribute('loaded', '');
  1299.     }
  1300.     const poo = typeof p.showPopover === 'function' && $('[popover]:popover-open');
  1301.     ai.popover = poo && poo.getBoundingClientRect().width && ($css(poo, {opacity: 0}), poo) || null;
  1302.     doc.body.insertBefore(p, ai.bar && ai.bar.parentElement === doc.body && ai.bar || null);
  1303.     await 0;
  1304.     if (App.checkProgress({start: true}) === false)
  1305.       return;
  1306.     if (p.complete)
  1307.       Popup.onLoad.call(ai.popup);
  1308.     else if (!isVideo)
  1309.       p.addEventListener('load', Popup.onLoad, {once: true});
  1310.   },
  1311.  
  1312.   destroy() {
  1313.     const p = ai.popup;
  1314.     if (!p) return;
  1315.     p.removeEventListener('load', Popup.onLoad);
  1316.     p.removeEventListener('error', App.handleError);
  1317.     if (ai.popover) {
  1318.       ai.popover.style.removeProperty('opacity');
  1319.       ai.popover = null;
  1320.     }
  1321.     if (isFunction(p.pause))
  1322.       p.pause();
  1323.     if (ai.blobUrl)
  1324.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1325.     p.remove();
  1326.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1327.   },
  1328.  
  1329.   move() {
  1330.     let x, y;
  1331.     const {cx, cy, extras, view} = ai;
  1332.     const vw = view.w - extras.outw;
  1333.     const vh = view.h - extras.outh;
  1334.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1335.     const h0 = ai.scale * ai.nheight + extras.inh;
  1336.     const isSwapped = ai.rotate % 180;
  1337.     const w = isSwapped ? h0 : w0;
  1338.     const h = isSwapped ? w0 : h0;
  1339.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1340.       const r = ai.rect;
  1341.       const rx = (r.left + r.right) / 2;
  1342.       const ry = (r.top + r.bottom) / 2;
  1343.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1344.         if (h < vh - 60)
  1345.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1346.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1347.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1348.         if (w < vw - 60)
  1349.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1350.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1351.       }
  1352.     }
  1353.     if (x == null) {
  1354.       x = vw > w
  1355.         ? (vw - w) / 2 + view.x
  1356.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1357.     }
  1358.     if (y == null) {
  1359.       y = vh > h
  1360.         ? (vh - h) / 2 + view.y
  1361.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1362.     }
  1363.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1364.     x += extras.o - diff;
  1365.     y += extras.o + diff;
  1366.     $css(ai.popup, {
  1367.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1368.                  `rotate(${ai.rotate || 0}deg) ` +
  1369.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1370.       width: `${Math.round(w0)}px`,
  1371.       height: `${Math.round(h0)}px`,
  1372.     });
  1373.   },
  1374.  
  1375.   onLoad() {
  1376.     if (this === ai.popup) {
  1377.       this.setAttribute('loaded', '');
  1378.       ai.popupLoaded = true;
  1379.       Status.set('-loading');
  1380.       let i = ai.gItem;
  1381.       if (i) i.url = this.src;
  1382.       if ((i = ai.gItemNext))
  1383.         Popup.preload(this, i);
  1384.     }
  1385.   },
  1386.  
  1387.   onZoom() {
  1388.     this.classList.remove(`${PREFIX}zooming`);
  1389.   },
  1390.  
  1391.   async preload(p, item, u = item.url, el = $new('img')) {
  1392.     ai.gItemNext = null;
  1393.     if (!isArray(u)) {
  1394.       el.src = u;
  1395.       return;
  1396.     }
  1397.     for (const arr = u; p === ai.popup && item.url === arr && (u = arr[0]);) {
  1398.       const {type} = await new Promise(cb => {
  1399.         el.src = u;
  1400.         el.onload = el.onerror = cb;
  1401.       });
  1402.       if (arr[0] === u)
  1403.         arr.shift();
  1404.       if (type === 'load') {
  1405.         item.url = u;
  1406.         break;
  1407.       }
  1408.     }
  1409.   },
  1410. };
  1411.  
  1412. const PopupVideo = {
  1413.   async create() {
  1414.     ai.bufBar = false;
  1415.     ai.bufStart = now();
  1416.     return $new('video', {
  1417.       autoplay: true,
  1418.       controls: true,
  1419.       muted: cfg.mute || new AudioContext().state === 'suspended',
  1420.       loop: true,
  1421.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1422.       onprogress: PopupVideo.progress,
  1423.       oncanplaythrough: PopupVideo.progressDone,
  1424.       onvolumechange: PopupVideo.rememberVolume,
  1425.     });
  1426.   },
  1427.  
  1428.   progress() {
  1429.     const {duration} = this;
  1430.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1431.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1432.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1433.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1434.     }
  1435.   },
  1436.  
  1437.   progressDone() {
  1438.     this.onprogress = this.oncanplaythrough = null;
  1439.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1440.       Bar.set(false);
  1441.     Popup.onLoad.call(this);
  1442.   },
  1443.  
  1444.   rememberVolume() {
  1445.     GM.setValue('volume', this.volume);
  1446.   },
  1447. };
  1448.  
  1449. const Ruler = {
  1450. /*
  1451.  'u' works only with URLs so it's ignored if 'html' is true
  1452.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1453.    |foo = url or text must start with foo
  1454.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1455.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1456.  'r' is checked only if 'u' matches first
  1457. */
  1458.   init() {
  1459.     const errors = new Map();
  1460.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1461.     const hasGMAE = typeof GM_addElement === 'function';
  1462.     const canEval = nonce || (nonce = ($('script[nonce]') || {}).nonce || '') || hasGMAE;
  1463.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1464.     const evalRules = [];
  1465.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1466.     for (const [rule, err] of errors.entries()) {
  1467.       if (!RX_EVAL_BLOCKED.test(err)) {
  1468.         App.handleError('Invalid custom host rule:', rule);
  1469.         continue;
  1470.       }
  1471.       if (canEval) {
  1472.         evalCode.push(evalRules.length ? ',' : '',
  1473.           '[', customRules.indexOf(rule), ',{',
  1474.           ...Object.keys(FN_ARGS)
  1475.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1476.             .filter(Boolean),
  1477.           '}]');
  1478.       }
  1479.       evalRules.push(rule);
  1480.     }
  1481.     if (evalRules.length) {
  1482.       let result, wnd;
  1483.       if (canEval) {
  1484.         const GMAE = hasGMAE
  1485.           ? GM_addElement // eslint-disable-line no-undef
  1486.           : (tag, {textContent: txt}) => document.head.appendChild(
  1487.             Object.assign(document.createElement(tag), {
  1488.               textContent: trustedScript ? trustedScript(txt) : txt,
  1489.               nonce,
  1490.             }));
  1491.         evalCode.push(']; document.currentScript.remove();');
  1492.         GMAE('script', {textContent: evalCode.join('')});
  1493.         result = (wnd = unsafeWindow)[evalId] ||
  1494.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1495.       }
  1496.       if (result) {
  1497.         for (const [index, fns] of result) {
  1498.           Object.assign(customRules[index], fns);
  1499.         }
  1500.         delete wnd[evalId];
  1501.       } else {
  1502.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1503.       }
  1504.     }
  1505.  
  1506.     // rules that disable previewing
  1507.     /** @type mpiv.HostRule[] */
  1508.     const disablers = [
  1509.       dotDomain.endsWith('.stackoverflow.com') && {
  1510.         e: '.post-tag, .post-tag img',
  1511.         s: '',
  1512.       },
  1513.     ];
  1514.  
  1515.     // optimization: a rule is created only when on domain
  1516.     /** @type mpiv.HostRule[] */
  1517.     const perDomain = [
  1518.       hostname.includes('startpage') && {
  1519.         r: /\boiu=(.+)/,
  1520.         s: '$1',
  1521.         follow: true,
  1522.       },
  1523.       dotDomain.endsWith('.4chan.org') && {
  1524.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1525.         q: '.op .fileText a',
  1526.         css: '#post-preview{display:none}',
  1527.       },
  1528.       hostname.includes('amazon.') && {
  1529.         r: /.+?images\/I\/.+?\./,
  1530.         s: m => {
  1531.           const uh = doc.getElementById('universal-hover');
  1532.           return uh ? '' : m[0] + 'jpg';
  1533.         },
  1534.         css: '#zoomWindow{display:none!important;}',
  1535.       },
  1536.       dotDomain.endsWith('.bing.com') && {
  1537.         e: 'a[m*="murl"]',
  1538.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1539.         s: '$1',
  1540.         html: true,
  1541.       },
  1542.       ...dotDomain.endsWith('.deviantart.com') && [{
  1543.         e: 'a[href*="/art/"] img[src*="/v1/"]',
  1544.         r: /^(.+)\/v1\/\w+\/[^/]+\/(.+)-\d+.(\.\w+)(\?.+)/,
  1545.         s: ([, base, name, ext, tok], node) => {
  1546.           let v = Util.getReactChildren(node.closest('a'), 'props.deviation.media.types');
  1547.           return v && (v = v.find(t => t.t === 'fullview')) && `${base}${
  1548.             v.c ? v.c.replace('<prettyName>', name)
  1549.               : `/v1/fill/w_${v.w},h_${v.h}/${name}-fullview${ext}`}${tok}`;
  1550.         },
  1551.       }, {
  1552.         e: '.dev-view-deviation img',
  1553.         s: () => [
  1554.           $('.dev-page-download').href,
  1555.           $('.dev-content-full').src,
  1556.         ].filter(Boolean),
  1557.       }, {
  1558.         e: 'a[data-hook=deviation_link]',
  1559.         q: 'link[as=image]',
  1560.       }] || [],
  1561.       dotDomain.endsWith('.discord.com') && {
  1562.         u: '||discordapp.net/external/',
  1563.         r: /\/https?\/(.+)/,
  1564.         s: '//$1',
  1565.         follow: true,
  1566.       },
  1567.       dotDomain.endsWith('.dropbox.com') && {
  1568.         r: /(.+?&size_mode)=\d+(.*)/,
  1569.         s: '$1=5$2',
  1570.       },
  1571.       dotDomain.endsWith('.facebook.com') && {
  1572.         e: 'a[href^="/photo/?"], a[href^="https://www.facebook.com/photo"]',
  1573.         s: (m, el) => (m = Util.getReactChildren(el.parentNode)) &&
  1574.           pick(m, (m[0] ? '0.props.linkProps' : 'props') + '.passthroughProps.origSrc'),
  1575.       },
  1576.       dotDomain.endsWith('.flickr.com') &&
  1577.       pick(unsafeWindow, 'YUI_config.flickr.api.site_key') && {
  1578.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1579.         s: m => `https://www.flickr.com/services/rest/?${
  1580.           new URLSearchParams({
  1581.             photo_id: m[1],
  1582.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1583.             method: 'flickr.photos.getSizes',
  1584.             format: 'json',
  1585.             nojsoncallback: 1,
  1586.           }).toString()}`,
  1587.         q: text => JSON.parse(text).sizes.size.pop().source,
  1588.         anonymous: true,
  1589.       },
  1590.       dotDomain.endsWith('.github.com') && {
  1591.         r: new RegExp([
  1592.           /(avatars.+?&s=)\d+/,
  1593.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1594.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1595.         ].map(rx => rx.source).join('|')),
  1596.         s: m => `https://${
  1597.           m[1] ? `${m[1]}460` :
  1598.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1599.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1600.         }`,
  1601.       },
  1602.       isGoogleImages && {
  1603.         e: 'a[href*="imgres?imgurl="] img',
  1604.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1605.         follow: true,
  1606.       },
  1607.       isGoogleImages && {
  1608.         e: '[data-tbnid] a:not([href])',
  1609.         s: (m, a) => {
  1610.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1611.           new MutationObserver((_, mo) => {
  1612.             mo.disconnect();
  1613.             App.isEnabled = true;
  1614.             a.alt = a2.innerText;
  1615.             const {left, top} = a.getBoundingClientRect();
  1616.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1617.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1618.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1619.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1620.         },
  1621.       },
  1622.       dotDomain.endsWith('.instagram.com') && {
  1623.         e: 'a[href*="/p/"],' +
  1624.           'article [role="button"][tabindex="0"],' +
  1625.           'article [role="button"][tabindex="0"] div',
  1626.         s: (m, node, rule) => {
  1627.           let data, a, n, img, src;
  1628.           if (location.pathname.startsWith('/p/') || location.pathname.startsWith('/tv/')) {
  1629.             img = $('img[srcset], video', node.parentNode);
  1630.             if (img && (isVideo(img) || parseFloat(img.sizes) > 900))
  1631.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1632.           }
  1633.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1634.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1635.           }
  1636.           const numPics = a && pick(data, 'edge_sidecar_to_children.edges.length') ||
  1637.             a && pick(data, 'carousel_media_count');
  1638.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1639.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1640.           rule.follow = !data && !rule.g;
  1641.           rule._data = data;
  1642.           rule._img = img;
  1643.           return (
  1644.             !a && !src ? false :
  1645.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1&__d=dis' : ''}` :
  1646.                 data.video_url || data.display_url);
  1647.         },
  1648.         c: (html, doc, node, rule) =>
  1649.           rule._getCaption(rule._data) || (rule._img || 0).alt || '',
  1650.         follow: true,
  1651.         _q: 'meta[property="og:video"]',
  1652.         _g(text, doc, url, m, rule) {
  1653.           const json = tryJSON(text);
  1654.           const media =
  1655.             pick(json, 'graphql.shortcode_media') ||
  1656.             pick(json, 'items.0');
  1657.           const items =
  1658.             pick(media, 'edge_sidecar_to_children.edges', res => res.map(e => ({
  1659.               url: e.node.video_url || e.node.display_url,
  1660.             }))) ||
  1661.             pick(media, 'carousel_media', res => res.map(e => ({
  1662.               url: pick(e, 'video_versions.0.url') || pick(e, 'image_versions2.candidates.0.url'),
  1663.             })));
  1664.           items.title = rule._getCaption(media) || '';
  1665.           return items;
  1666.         },
  1667.         _getCaption: data => pick(data, 'caption.text') ||
  1668.           pick(data, 'edge_media_to_caption.edges.0.node.text'),
  1669.       },
  1670.       ...dotDomain.endsWith('.reddit.com') && [{
  1671.         u: '||i.reddituploads.com/',
  1672.       }, {
  1673.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1674.         s: (m, node) => $propUp(node, 'data-url'),
  1675.       }, {
  1676.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1677.         s: 'https://i$1',
  1678.       }] || [],
  1679.       dotDomain.endsWith('.tumblr.com') && {
  1680.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1681.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1682.         follow: true,
  1683.       },
  1684.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1685.         e: 'a.media-item, a.js-media-image-link',
  1686.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1687.         follow: true,
  1688.       },
  1689.       dotDomain.endsWith('.twitter.com') && {
  1690.         e: '.grid-tweet > .media-overlay',
  1691.         s: (m, node) => node.previousElementSibling.src,
  1692.         follow: true,
  1693.       },
  1694.     ];
  1695.  
  1696.     /** @type mpiv.HostRule[] */
  1697.     const main = [
  1698.       {
  1699.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1700.         s: '$1',
  1701.         follow: true,
  1702.         onerror: 'skip',
  1703.       },
  1704.       {
  1705.         u: [
  1706.           '||500px.com/photo/',
  1707.           '||cl.ly/',
  1708.           '||cweb-pix.com/',
  1709.           '//ibb.co/',
  1710.           '||imgcredit.xyz/image/',
  1711.         ],
  1712.         r: /\.\w+\/.+/,
  1713.         q: 'meta[property="og:image"]',
  1714.       },
  1715.       {
  1716.         u: 'attachment.php',
  1717.         r: /attachment\.php.+attachmentid/,
  1718.       },
  1719.       {
  1720.         u: '||abload.de/image',
  1721.         q: '#image',
  1722.       },
  1723.       {
  1724.         u: '||deviantart.com/art/',
  1725.         s: (m, node) =>
  1726.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1727.             '' :
  1728.             m.input,
  1729.         q: [
  1730.           '#download-button[href*=".jpg"]',
  1731.           '#download-button[href*=".jpeg"]',
  1732.           '#download-button[href*=".gif"]',
  1733.           '#download-button[href*=".png"]',
  1734.           '#gmi-ResViewSizer_fullimg',
  1735.           'img.dev-content-full',
  1736.         ],
  1737.       },
  1738.       {
  1739.         u: '||dropbox.com/s',
  1740.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1741.         q: (text, doc) =>
  1742.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1743.       },
  1744.       {
  1745.         r: /[./]ebay\.[^/]+\/itm\//,
  1746.         q: text =>
  1747.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1748.             .replace(/~~60_\d+/, '~~60_57'),
  1749.       },
  1750.       {
  1751.         u: '||i.ebayimg.com/',
  1752.         s: (m, node) =>
  1753.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1754.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1755.       },
  1756.       {
  1757.         u: '||fastpic.',
  1758.         s: (m, node) => {
  1759.           const a = node.closest('a');
  1760.           const url = decodeURIComponent(Req.findImageUrl(a || node))
  1761.             .replace(/\/i(\d+)\.(\w+\.\w+\/)\w+/, '/$2$1')
  1762.             .replace(/^\w+:\/\/fastpic[^/]+((?:\/\d+){3})\/\w+(\/\w+\.\w+).*/,
  1763.               'https://fastpic.org/view$1$2.html');
  1764.           return a || url.includes('.png') ? url : [url, url.replace(/\.jpe?g/, '.png')];
  1765.         },
  1766.         q: 'img[src*="/big/"]',
  1767.       },
  1768.       {
  1769.         u: '||flickr.com/photos/',
  1770.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1771.         s: m =>
  1772.           m.input.indexOf('/sizes/') < 0 ?
  1773.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1774.             false,
  1775.         q: (text, doc) => {
  1776.           const links = $$('.sizes-list a', doc);
  1777.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1778.         },
  1779.         follow: true,
  1780.       },
  1781.       {
  1782.         u: '||flickr.com/photos/',
  1783.         r: /\/sizes\//,
  1784.         q: '#allsizes-photo > img',
  1785.       },
  1786.       {
  1787.         u: '||gfycat.com/',
  1788.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1789.         s: 'https://$1$3',
  1790.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1791.       },
  1792.       {
  1793.         u: [
  1794.           '||googleusercontent.com/proxy',
  1795.           '||googleusercontent.com/gadgets/proxy',
  1796.         ],
  1797.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1798.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1799.       },
  1800.       {
  1801.         u: [
  1802.           '||googleusercontent.com/',
  1803.           '||ggpht.com/',
  1804.         ],
  1805.         s: m => m.input.includes('webcache.') ? '' :
  1806.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1807.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1808.       },
  1809.       {
  1810.         u: '||gravatar.com/',
  1811.         r: /([a-z0-9]{32})/,
  1812.         s: 'https://gravatar.com/avatar/$1?s=200',
  1813.       },
  1814.       {
  1815.         u: '//gyazo.com/',
  1816.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1817.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1818.         _q: 'link[rel="image_src"]',
  1819.       },
  1820.       {
  1821.         u: '||hostingkartinok.com/show-image.php',
  1822.         q: '.image img',
  1823.       },
  1824.       {
  1825.         u: [
  1826.           '||imagecurl.com/images/',
  1827.           '||imagecurl.com/viewer.php',
  1828.         ],
  1829.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1830.         s: 'https://imagecurl.com/images/$1$2$3',
  1831.       },
  1832.       {
  1833.         u: '||imagebam.com/',
  1834.         r: /^(https:\/\/)thumbs\d+(\.imagebam\.com\/).*?([^/]+)_t\./,
  1835.         s: '$1www$2view/$3',
  1836.         q: 'img.main-image',
  1837.       },
  1838.       {
  1839.         u: '||www.imagebam.com/view/',
  1840.         q: 'img.main-image',
  1841.       },
  1842.       {
  1843.         u: '||imageban.ru/thumbs',
  1844.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1845.         s: '$1out$2/$3/$4',
  1846.       },
  1847.       {
  1848.         u: [
  1849.           '||imageban.ru/show',
  1850.           '||imageban.net/show',
  1851.           '||ibn.im/',
  1852.         ],
  1853.         q: '#img_main',
  1854.       },
  1855.       {
  1856.         u: '||imageshack.us/img',
  1857.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1858.         s: 'https://$2/download/$1/$3$4',
  1859.       },
  1860.       {
  1861.         u: '||imageshack.us/i/',
  1862.         q: '#share-dl',
  1863.       },
  1864.       {
  1865.         u: '||imageteam.org/img',
  1866.         q: 'img[alt="image"]',
  1867.       },
  1868.       {
  1869.         u: [
  1870.           '||imagetwist.com/',
  1871.           '||imageshimage.com/',
  1872.         ],
  1873.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1874.         q: 'img.pic',
  1875.         xhr: true,
  1876.       },
  1877.       {
  1878.         u: '||imageupper.com/i/',
  1879.         q: '#img',
  1880.         xhr: true,
  1881.       },
  1882.       {
  1883.         u: '||imagevenue.com/',
  1884.         q: 'a[data-toggle="full"] img',
  1885.       },
  1886.       {
  1887.         u: '||imagezilla.net/show/',
  1888.         q: '#photo',
  1889.         xhr: true,
  1890.       },
  1891.       {
  1892.         u: [
  1893.           '||images-na.ssl-images-amazon.com/images/',
  1894.           '||media-imdb.com/images/',
  1895.         ],
  1896.         r: /images\/.+?\.jpg/,
  1897.         s: '/V1\\.?_.+?\\.//g',
  1898.       },
  1899.       {
  1900.         u: '||imgbox.com/',
  1901.         r: /\.com\/([a-z0-9]+)$/i,
  1902.         q: '#img',
  1903.         xhr: hostname !== 'imgbox.com',
  1904.       },
  1905.       {
  1906.         u: '||imgclick.net/',
  1907.         r: /\.net\/(\w+)/,
  1908.         q: 'img.pic',
  1909.         xhr: true,
  1910.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1911.       },
  1912.       {
  1913.         u: '.imgcredit.xyz/',
  1914.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1915.         s: ['https$1$2', 'https$1.png'],
  1916.       },
  1917.       {
  1918.         u: [
  1919.           '||imgflip.com/i/',
  1920.           '||imgflip.com/gif/',
  1921.         ],
  1922.         r: /\/(i|gif)\/([^/?#]+)/,
  1923.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1924.       },
  1925.       {
  1926.         u: [
  1927.           '||imgur.com/a/',
  1928.           '||imgur.com/gallery/',
  1929.         ],
  1930.         s: 'gallery', // suppressing an unused network request for remote `document`
  1931.         async g() {
  1932.           let u = `https://imgur.com/ajaxalbums/getimages/${ai.url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1933.           let info = tryJSON((await Req.gmXhr(u)).responseText) || 0;
  1934.           let images = (info.data || 0).images || [];
  1935.           if (!images[0]) {
  1936.             info = (await Req.gmXhr(ai.url)).responseText.match(/postDataJSON=(".*?")<|$/)[1];
  1937.             info = tryJSON(tryJSON(info)) || 0;
  1938.             images = info.media;
  1939.           }
  1940.           const items = [];
  1941.           for (const img of images) {
  1942.             const meta = img.metadata || img;
  1943.             items.push({
  1944.               url: img.url ||
  1945.                 (u = `https://i.imgur.com/${img.hash}`) && (
  1946.                   img.ext === '.gif' && img.animated !== false ?
  1947.                     [`${u}.webm`, `${u}.mp4`, u] :
  1948.                     u + img.ext
  1949.                 ),
  1950.               desc: [meta.title, meta.description].filter(Boolean).join(' - '),
  1951.             });
  1952.           }
  1953.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1954.             items.title = info.title;
  1955.           return items;
  1956.         },
  1957.       },
  1958.       {
  1959.         u: '||imgur.com/',
  1960.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1961.         s: 'gallery',
  1962.         g: (text, doc, url, m) =>
  1963.           m[2].split(',').map(id => ({
  1964.             url: `https://i.${m[1]}${id}.jpg`,
  1965.           })),
  1966.       },
  1967.       {
  1968.         u: '||imgur.com/',
  1969.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1970.         s: (m, node) => {
  1971.           if (/memegen|random|register|search|signin/.test(m.input))
  1972.             return '';
  1973.           const a = node.closest('a');
  1974.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1975.             return false;
  1976.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1977.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1978.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1979.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1980.           return ext === 'webm' ?
  1981.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1982.             u + ext;
  1983.         },
  1984.       },
  1985.       {
  1986.         u: [
  1987.           '||instagr.am/p/',
  1988.           '||instagram.com/p/',
  1989.           '||instagram.com/tv/',
  1990.         ],
  1991.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') +
  1992.         '/?__a=1&__d=dis',
  1993.         q: m => (m = tryJSON(m)) && (
  1994.           m = pick(m, 'graphql.shortcode_media') || pick(m, 'items.0') || 0
  1995.         ) && (
  1996.           m.video_url ||
  1997.           m.display_url ||
  1998.           pick(m, 'video_versions.0.url') ||
  1999.           pick(m, 'carousel_media.0.image_versions2.candidates.0.url') ||
  2000.           pick(m, 'image_versions2.candidates.0.url')
  2001.         ),
  2002.         rect: 'div.PhotoGridMediaItem',
  2003.         c: m => (m = tryJSON(m)) && (
  2004.           pick(m, 'items.0.caption.text') ||
  2005.           pick(m, 'graphql.shortcode_media.edge_media_to_caption.edges.0.node.text') ||
  2006.           ''
  2007.         ),
  2008.       },
  2009.       {
  2010.         u: [
  2011.           '||livememe.com/',
  2012.           '||lvme.me/',
  2013.         ],
  2014.         r: /\.\w+\/([^.]+)$/,
  2015.         s: 'http://i.lvme.me/$1.jpg',
  2016.       },
  2017.       {
  2018.         u: '||lostpic.net/image',
  2019.         q: '.image-viewer-image img',
  2020.       },
  2021.       {
  2022.         u: '||makeameme.org/meme/',
  2023.         r: /\/meme\/([^/?#]+)/,
  2024.         s: 'https://media.makeameme.org/created/$1.jpg',
  2025.       },
  2026.       {
  2027.         u: '||photobucket.com/',
  2028.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  2029.         s: 'https://i$1$3',
  2030.         xhr: !dotDomain.endsWith('.photobucket.com'),
  2031.       },
  2032.       {
  2033.         u: '||piccy.info/view3/',
  2034.         r: /(.+?\/view3)\/(.*)\//,
  2035.         s: '$1/$2/orig/',
  2036.         q: '#mainim',
  2037.       },
  2038.       {
  2039.         u: '||pimpandhost.com/image/',
  2040.         r: /(.+?\/image\/[0-9]+)/,
  2041.         s: '$1?size=original',
  2042.         q: 'img.original',
  2043.       },
  2044.       {
  2045.         u: [
  2046.           '||pixroute.com/',
  2047.           '||imgspice.com/',
  2048.         ],
  2049.         r: /\.html$/,
  2050.         q: 'img[id]',
  2051.         xhr: true,
  2052.       },
  2053.       {
  2054.         u: '||postima',
  2055.         r: /postima?ge?\.org\/image\/\w+/,
  2056.         q: [
  2057.           'a[href*="dl="]',
  2058.           '#main-image',
  2059.         ],
  2060.       },
  2061.       {
  2062.         u: [
  2063.           '||prntscr.com/',
  2064.           '||prnt.sc/',
  2065.         ],
  2066.         r: /\.\w+\/.+/,
  2067.         q: 'meta[property="og:image"]',
  2068.         xhr: true,
  2069.       },
  2070.       {
  2071.         u: '||radikal.ru/',
  2072.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2073.         s: (m, node, rule) =>
  2074.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2075.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2076.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2077.       },
  2078.       {
  2079.         u: '||tumblr.com',
  2080.         r: /_500\.jpg/,
  2081.         s: ['/_500/_1280/', ''],
  2082.       },
  2083.       {
  2084.         u: '||twimg.com/media/',
  2085.         r: /.+?format=(jpe?g|png|gif)/i,
  2086.         s: '$0&name=orig',
  2087.       },
  2088.       {
  2089.         u: '||twimg.com/media/',
  2090.         r: /.+?\.(jpe?g|png|gif)/i,
  2091.         s: '$0:orig',
  2092.       },
  2093.       {
  2094.         u: '||twimg.com/1/proxy',
  2095.         r: /t=([^&_]+)/i,
  2096.         s: m => atob(m[1]).match(/http.+/),
  2097.       },
  2098.       {
  2099.         u: '||twimg.com/',
  2100.         r: /\/profile_images/i,
  2101.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2102.       },
  2103.       {
  2104.         u: '||pic.twitter.com/',
  2105.         r: /\.com\/[a-z0-9]+/i,
  2106.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2107.         follow: true,
  2108.       },
  2109.       {
  2110.         u: '||twitpic.com/',
  2111.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2112.         s: 'https://twitpic.com/show/large/$2',
  2113.       },
  2114.       {
  2115.         u: '||wiki',
  2116.         r: /\/(?:thumb|images)\/.+\.(?:jpe?g|gif|png|svg)/i,
  2117.         s: m => m.input.replace(/\/(thumb(?=\/)|\d+px[^/]+(?=$|\?))/g, '')
  2118.           .replace(/\/(scale-to-width(-[a-z]+)?\/\d+|(zoom-crop|smart)(\/(width|height)\/\d+)+)/g, '/'),
  2119.         xhr: !hostname.includes('wiki'),
  2120.       },
  2121.       {
  2122.         u: '||ytimg.com/vi/',
  2123.         r: /(.+?\/vi\/[^/]+)/,
  2124.         s: '$1/0.jpg',
  2125.         rect: '.video-list-item',
  2126.       },
  2127.       {
  2128.         u: '/viewer.php?file=',
  2129.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2130.         s: '$1/images/$2',
  2131.         xhr: true,
  2132.       },
  2133.       {
  2134.         u: '/thumb_',
  2135.         r: /\/albums.+\/thumb_[^/]/,
  2136.         s: '/thumb_//',
  2137.       },
  2138.       {
  2139.         u: [
  2140.           '.th.jp',
  2141.           '.th.gif',
  2142.           '.th.png',
  2143.         ],
  2144.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2145.         s: '$1$2',
  2146.         follow: true,
  2147.       },
  2148.       {
  2149.         r: RX_MEDIA_URL,
  2150.       },
  2151.     ];
  2152.  
  2153.     /** @type mpiv.HostRule[] */
  2154.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2155.       .forEach(rule => {
  2156.         if (isArray(rule.e))
  2157.           rule.e = rule.e.join(',');
  2158.       });
  2159.   },
  2160.  
  2161.   format(rule, {expand} = {}) {
  2162.     const s = Util.stringify(rule, null, ' ');
  2163.     return expand ?
  2164.       /* {"a": ...,
  2165.           "b": ...,
  2166.           "c": ...
  2167.          } */
  2168.       s.replace(/^{\s+/g, '{') :
  2169.       /* {"a": ..., "b": ..., "c": ...} */
  2170.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2171.   },
  2172.  
  2173.   fromElement(el) {
  2174.     const text = el.textContent.trim();
  2175.     if (text.startsWith('{') &&
  2176.         text.endsWith('}') &&
  2177.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2178.       const rule = tryJSON(text);
  2179.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2180.     }
  2181.   },
  2182.  
  2183.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2184.  
  2185.   /** @returns mpiv.HostRule | Error | false | undefined */
  2186.   parse(rule) {
  2187.     const isBatchOp = this instanceof Map;
  2188.     try {
  2189.       if (typeof rule === 'string')
  2190.         rule = JSON.parse(rule);
  2191.       if ('d' in rule && typeof rule.d !== 'string')
  2192.         rule.d = undefined;
  2193.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2194.         return false;
  2195.       let {e} = rule;
  2196.       if (e != null) {
  2197.         e = typeof e === 'string' ? e.trim()
  2198.           : isArray(e) ? e.join(',').trim()
  2199.             : Object.entries(e).every(Ruler.isValidE2) && e;
  2200.         if (!e)
  2201.           throw new Error('Invalid syntax for "e". Examples: ' +
  2202.             '"e": ".image" or ' +
  2203.             '"e": [".image1", ".image2"] or ' +
  2204.             '"e": {".parent": ".image"} or ' +
  2205.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2206.         if (isBatchOp) rule.e = e || undefined;
  2207.       }
  2208.       let compileTo = isBatchOp ? rule : {};
  2209.       if (rule.r)
  2210.         compileTo.r = new RegExp(rule.r, 'i');
  2211.       if (App.NOP)
  2212.         compileTo = {};
  2213.       for (const key of Object.keys(FN_ARGS)) {
  2214.         if (RX_HAS_CODE.test(rule[key])) {
  2215.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2216.           if (fn !== App.NOP || !isBatchOp) {
  2217.             compileTo[key] = fn;
  2218.           } else if (isBatchOp) {
  2219.             this.set(rule, 'unsafe-eval');
  2220.           }
  2221.         }
  2222.       }
  2223.       return rule;
  2224.     } catch (err) {
  2225.       if (isBatchOp) {
  2226.         this.set(rule, err);
  2227.         return rule;
  2228.       } else {
  2229.         return err;
  2230.       }
  2231.     }
  2232.   },
  2233.  
  2234.   runC(text, doc = document) {
  2235.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2236.     ai.caption = fn(text, doc);
  2237.   },
  2238.  
  2239.   runCHandler: {
  2240.     function: (text, doc) =>
  2241.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2242.     string: (text, doc) => {
  2243.       const el = $many(ai.rule.c, doc);
  2244.       return !el ? '' :
  2245.         el.getAttribute('content') ||
  2246.         el.getAttribute('title') ||
  2247.         el.textContent;
  2248.     },
  2249.     default: (text, doc, el = ai.node) =>
  2250.       (ai.tooltip || 0).text ||
  2251.       el.alt ||
  2252.       $propUp(el, 'title') ||
  2253.       Req.getFileName(
  2254.         el.tagName === (ai.popup || 0).tagName
  2255.           ? ai.url
  2256.           : el.src || $propUp(el, 'href')),
  2257.   },
  2258.  
  2259.   runQ(text, doc, docUrl) {
  2260.     let url;
  2261.     if (isFunction(ai.rule.q)) {
  2262.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2263.       if (isArray(url)) {
  2264.         ai.urls = url.slice(1);
  2265.         url = url[0];
  2266.       }
  2267.     } else {
  2268.       const el = $many(ai.rule.q, doc);
  2269.       url = Req.findImageUrl(el, docUrl);
  2270.     }
  2271.     return url;
  2272.   },
  2273.  
  2274.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2275.   runE(rule, e, node) {
  2276.     let p, img, res, info;
  2277.     for (const selParent in e) {
  2278.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2279.         if (img === node)
  2280.           res = true;
  2281.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2282.           return info;
  2283.       }
  2284.     }
  2285.     return res;
  2286.   },
  2287.  
  2288.   /** @returns {?Array} if falsy then the rule should be skipped */
  2289.   runS(node, rule, m) {
  2290.     let urls = [], u;
  2291.     for (const s of ensureArray(rule.s))
  2292.       urls.push(
  2293.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2294.           isFunction(s) ? s(m, node, rule) :
  2295.             s);
  2296.     if (rule.q && urls.length > 1) {
  2297.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2298.       return;
  2299.     }
  2300.     if (isArray(u = urls[0]))
  2301.       u = [urls = u][0];
  2302.     return u === '' /* "stop all rules" */ ? urls
  2303.       : u && arrayFrom(new Set(urls), Util.decodeUrl);
  2304.   },
  2305.  
  2306.   /** @returns {boolean} */
  2307.   runU(rule, url) {
  2308.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2309.     return u.fn.call(u.data, url);
  2310.   },
  2311.  
  2312.   substituteSingle(s, m) {
  2313.     if (!m || m.input == null) return s;
  2314.     if (s.startsWith('/') && !s.startsWith('//')) {
  2315.       const mid = s.search(/[^\\]\//) + 1;
  2316.       const end = s.lastIndexOf('/');
  2317.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2318.       return m.input.replace(re, s.slice(mid + 1, end));
  2319.     }
  2320.     if (m.length && s.includes('$')) {
  2321.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2322.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2323.         for (let i = maxLength; i >= 0; i--) {
  2324.           const part = num.slice(0, i) | 0;
  2325.           if (part < m.length)
  2326.             return (m[part] || '') + num.slice(i);
  2327.         }
  2328.         return text;
  2329.       });
  2330.     }
  2331.     return s;
  2332.   },
  2333.  
  2334.   toggle(rule, prop, condition) {
  2335.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2336.     return condition;
  2337.   },
  2338. };
  2339.  
  2340. const RuleMatcher = {
  2341.  
  2342.   /** @returns {Object} */
  2343.   adaptiveFind(node, opts) {
  2344.     const tn = node.tagName;
  2345.     const src = node.currentSrc || node.src || '';
  2346.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2347.     let a, info, url;
  2348.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2349.     if (tn !== 'A') {
  2350.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2351.       info = RuleMatcher.find(url, node, opts);
  2352.     }
  2353.     if (!info && (a = node.closest('A'))) {
  2354.       const ds = a.dataset;
  2355.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2356.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2357.       url = !url.startsWith('data:') && url;
  2358.       info = RuleMatcher.find(url, a, opts);
  2359.     }
  2360.     if (!info && isPic)
  2361.       info = {node, rule: {}, url: src};
  2362.     return info;
  2363.   },
  2364.  
  2365.   /** @returns ?mpiv.RuleMatchInfo */
  2366.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2367.     let tn, isPic, html, h;
  2368.     for (const rule of rules || Ruler.rules) {
  2369.       let e, m;
  2370.       if (skipRules && skipRules.includes(rule) ||
  2371.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2372.           !rules && (e = rule.e) &&
  2373.             !(m = typeof e === 'string' ? node.matches(e) : Ruler.runE(rule, e, node)))
  2374.         continue;
  2375.       if (m && m.url)
  2376.         return m;
  2377.       const {r, s} = rule;
  2378.       let hasS = s != null;
  2379.       h = !noHtml && (r || hasS) && rule.html && (html || (html = node.outerHTML));
  2380.       if (r) {
  2381.         m = h ? r.exec(h) : url && r.exec(url);
  2382.       } else {
  2383.         m = ['']; m[0] = m.input = h || url || ''; m.index = 0;
  2384.       }
  2385.       if (!m)
  2386.         continue;
  2387.       if (s === '')
  2388.         return {};
  2389.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2390.       // but we'll only allow it to match rules without 's' in the nested find call
  2391.       if (!hasS && !skipRules && (tn ? isPic : isPic = (tn = node.tagName) === 'IMG' || tn === 'VIDEO'))
  2392.         continue;
  2393.       hasS &= s !== 'gallery';
  2394.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2395.       if (urls)
  2396.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2397.     }
  2398.   },
  2399.  
  2400.   /** @returns ?mpiv.RuleMatchInfo */
  2401.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2402.     let info;
  2403.     let url = `${urls[0]}`;
  2404.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2405.     if (url)
  2406.       url = Util.rel2abs(url);
  2407.     else
  2408.       info = {};
  2409.     if (follow)
  2410.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2411.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2412.       const xhr = cfg.xhr && rule.xhr;
  2413.       info = {
  2414.         match,
  2415.         node,
  2416.         rule,
  2417.         url,
  2418.         urls: urls.length > 1 ? urls.slice(1) : null,
  2419.         gallery: rule.g && Gallery.makeParser(rule.g),
  2420.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2421.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2422.       };
  2423.     }
  2424.     return info;
  2425.   },
  2426.  
  2427.   isFollowableUrl(url, rule) {
  2428.     const f = rule.follow;
  2429.     return isFunction(f) ? f(url) : f;
  2430.   },
  2431. };
  2432.  
  2433. const Req = {
  2434.  
  2435.   gmXhr(url, opts = {}) {
  2436.     if (ai.req)
  2437.       tryCatch(ai.req.abort);
  2438.     return new Promise((resolve, reject) => {
  2439.       const {anonymous} = ai.rule || {};
  2440.       ai.req = GM.xmlHttpRequest(Object.assign({
  2441.         url,
  2442.         anonymous,
  2443.         withCredentials: !anonymous,
  2444.         method: 'GET',
  2445.         timeout: 30e3,
  2446.       }, opts, {
  2447.         onload: done,
  2448.         onerror: done,
  2449.         ontimeout() {
  2450.           ai.req = null;
  2451.           reject(`Timeout fetching ${url}`);
  2452.         },
  2453.       }));
  2454.       function done(r) {
  2455.         ai.req = null;
  2456.         if (r.status < 400 && !r.error)
  2457.           resolve(r);
  2458.         else
  2459.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2460.       }
  2461.     });
  2462.   },
  2463.  
  2464.   async getDoc(url) {
  2465.     if (!url) {
  2466.       // current document
  2467.       return {
  2468.         doc,
  2469.         finalUrl: location.href,
  2470.         responseText: doc.documentElement.outerHTML,
  2471.       };
  2472.     }
  2473.     const r = await (!ai.post ?
  2474.       Req.gmXhr(url) :
  2475.       Req.gmXhr(url, {
  2476.         method: 'POST',
  2477.         data: ai.post,
  2478.         headers: {
  2479.           'Content-Type': 'application/x-www-form-urlencoded',
  2480.           'Referer': url,
  2481.         },
  2482.       }));
  2483.     r.doc = $parseHtml(r.responseText);
  2484.     return r;
  2485.   },
  2486.  
  2487.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2488.     ai.bufBar = false;
  2489.     ai.bufStart = now();
  2490.     const response = await Req.gmXhr(url, {
  2491.       responseType: 'blob',
  2492.       headers: {
  2493.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2494.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2495.       },
  2496.       onprogress: Req.getImageProgress,
  2497.     });
  2498.     Bar.set(false);
  2499.     const type = Req.guessMimeType(response);
  2500.     let b = response.response;
  2501.     if (!b) throw 'Empty response';
  2502.     if (b.type !== type)
  2503.       b = b.slice(0, b.size, type);
  2504.     const res = xhr === 'blob'
  2505.       ? (ai.blobUrl = URL.createObjectURL(b))
  2506.       : await Req.blobToDataUrl(b);
  2507.     return [res, type.startsWith('video')];
  2508.   },
  2509.  
  2510.   getImageProgress(e) {
  2511.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2512.       ai.bufBar = true;
  2513.     if (ai.bufBar) {
  2514.       const pct = e.loaded / e.total * 100 | 0;
  2515.       const size = e.total / 1024 | 0;
  2516.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2517.     }
  2518.   },
  2519.  
  2520.   async findRedirect() {
  2521.     try {
  2522.       const {finalUrl} = await Req.gmXhr(ai.url, {
  2523.         method: 'HEAD',
  2524.         headers: {
  2525.           'Referer': location.href.split('#', 1)[0],
  2526.         },
  2527.       });
  2528.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2529.       if (!info || !info.url)
  2530.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2531.       Object.assign(ai, info);
  2532.       App.startSingle();
  2533.     } catch (e) {
  2534.       App.handleError(e);
  2535.     }
  2536.   },
  2537.  
  2538.   async saveFile() {
  2539.     const url = ai.popup.src || ai.popup.currentSrc;
  2540.     let name = Req.getFileName(ai.imageUrl || url);
  2541.     if (!name.includes('.'))
  2542.       name += '.jpg';
  2543.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2544.       $new('a', {href: url, download: name})
  2545.         .dispatchEvent(new MouseEvent('click'));
  2546.     } else {
  2547.       Status.set('+loading');
  2548.       const onload = () => Status.set('-loading');
  2549.       const gmDL = typeof GM_download === 'function';
  2550.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2551.         url,
  2552.         name,
  2553.         headers: {Referer: url},
  2554.         method: 'get', // polyfilling GM_download
  2555.         responseType: 'blob', // polyfilling GM_download
  2556.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2557.         onerror: e => {
  2558.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2559.           onload();
  2560.         },
  2561.         onprogress: Req.getImageProgress,
  2562.         onload({response}) {
  2563.           onload();
  2564.           if (!gmDL) { // polyfilling GM_download
  2565.             const a = Object.assign(document.createElement('a'), {
  2566.               href: URL.createObjectURL(response),
  2567.               download: name,
  2568.             });
  2569.             a.dispatchEvent(new MouseEvent('click'));
  2570.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2571.           }
  2572.         },
  2573.       });
  2574.     }
  2575.   },
  2576.  
  2577.   getFileName(url) {
  2578.     return decodeURIComponent(url).split(/[#?&]/, 1)[0].split('/').pop();
  2579.   },
  2580.  
  2581.   blobToDataUrl(blob) {
  2582.     return new Promise((resolve, reject) => {
  2583.       const fr = new FileReader();
  2584.       fr.onload = () => resolve(fr.result);
  2585.       fr.onerror = reject;
  2586.       fr.readAsDataURL(blob);
  2587.     });
  2588.   },
  2589.  
  2590.   guessMimeType({responseHeaders, finalUrl}) {
  2591.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2592.         !RegExp.$1.includes('text/plain'))
  2593.       return RegExp.$1;
  2594.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2595.     switch (ext.toLowerCase()) {
  2596.       case 'bmp': return 'image/bmp';
  2597.       case 'gif': return 'image/gif';
  2598.       case 'jpe': return 'image/jpeg';
  2599.       case 'jpeg': return 'image/jpeg';
  2600.       case 'jpg': return 'image/jpeg';
  2601.       case 'mp4': return 'video/mp4';
  2602.       case 'png': return 'image/png';
  2603.       case 'svg': return 'image/svg+xml';
  2604.       case 'tif': return 'image/tiff';
  2605.       case 'tiff': return 'image/tiff';
  2606.       case 'webm': return 'video/webm';
  2607.       default: return 'application/octet-stream';
  2608.     }
  2609.   },
  2610.  
  2611.   findImageUrl(n, url) {
  2612.     if (!n) return;
  2613.     let html;
  2614.     const path =
  2615.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2616.       n.getAttribute('src') ||
  2617.       n.getAttribute('data-m4v') ||
  2618.       n.getAttribute('href') ||
  2619.       n.getAttribute('content') ||
  2620.       (html = n.outerHTML).includes('http') &&
  2621.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2622.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2623.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2624.   },
  2625. };
  2626.  
  2627. const Status = {
  2628.  
  2629.   set(status) {
  2630.     if (!status && !cfg.globalStatus) {
  2631.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2632.       return;
  2633.     }
  2634.     const prefix = cfg.globalStatus ? PREFIX : '';
  2635.     const action = status && /^[+-]/.test(status) && status[0];
  2636.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2637.     const el = cfg.globalStatus ? doc.documentElement :
  2638.       name === 'edge' ? ai.popup :
  2639.         ai.node;
  2640.     if (!el) return;
  2641.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2642.     const oldValue = (el.getAttribute(attr) || '').trim();
  2643.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2644.     switch (action) {
  2645.       case '-':
  2646.         cls.delete(name);
  2647.         break;
  2648.       case false:
  2649.         for (const c of cls)
  2650.           if (c.startsWith(prefix) && c !== name)
  2651.             cls.delete(c);
  2652.       // fallthrough to +
  2653.       case '+':
  2654.         if (name)
  2655.           cls.add(name);
  2656.         break;
  2657.     }
  2658.     const newValue = [...cls].join(' ');
  2659.     if (newValue !== oldValue)
  2660.       el.setAttribute(attr, newValue);
  2661.   },
  2662.  
  2663.   loading(force) {
  2664.     if (!force) {
  2665.       clearTimeout(ai.timerStatus);
  2666.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2667.     } else if (!ai.popupLoaded) {
  2668.       Status.set('+loading');
  2669.     }
  2670.   },
  2671. };
  2672.  
  2673. const UrlMatcher = (() => {
  2674.   // string-to-regexp escaped chars
  2675.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2676.   // rx for '^' symbol in simple url match
  2677.   const RX_SEP = /[^\w%._-]/y;
  2678.   const RXS_SEP = RX_SEP.source;
  2679.   return match => {
  2680.     const results = [];
  2681.     for (const s of ensureArray(match)) {
  2682.       const pinDomain = s.startsWith('||');
  2683.       const pinStart = !pinDomain && s.startsWith('|');
  2684.       const endSep = s.endsWith('^');
  2685.       let fn;
  2686.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2687.       if (needle.includes('^')) {
  2688.         let plain = '';
  2689.         for (const part of needle.split('^'))
  2690.           if (part.length > plain.length)
  2691.             plain = part;
  2692.         const rx = new RegExp(
  2693.           (pinStart ? '^' : '') +
  2694.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2695.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2696.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2697.         needle = [plain, rx];
  2698.         fn = regexp;
  2699.       } else if (pinStart) {
  2700.         fn = endSep ? equals : starts;
  2701.       } else if (pinDomain) {
  2702.         const slashPos = needle.indexOf('/');
  2703.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2704.         needle = [needle, domain, slashPos > 0, endSep];
  2705.         fn = startsDomainPrescreen;
  2706.       } else if (endSep) {
  2707.         fn = ends;
  2708.       } else {
  2709.         fn = has;
  2710.       }
  2711.       results.push({fn, data: needle});
  2712.     }
  2713.     return results.length > 1 ?
  2714.       {fn: checkArray, data: results} :
  2715.       results[0];
  2716.   };
  2717.   function checkArray(s) {
  2718.     return this.some(checkArrayItem, s);
  2719.   }
  2720.   function checkArrayItem(item) {
  2721.     return item.fn.call(item.data, this);
  2722.   }
  2723.   function ends(s) {
  2724.     return s.endsWith(this) || (
  2725.       s.length > this.length &&
  2726.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2727.       endsWithSep(s));
  2728.   }
  2729.   function endsWithSep(s, pos = s.length - 1) {
  2730.     RX_SEP.lastIndex = pos;
  2731.     return RX_SEP.test(s);
  2732.   }
  2733.   function equals(s) {
  2734.     return s.startsWith(this) && (
  2735.       s.length === this.length ||
  2736.       s.length === this.length + 1 && endsWithSep(s));
  2737.   }
  2738.   function has(s) {
  2739.     return s.includes(this);
  2740.   }
  2741.   function regexp(s) {
  2742.     return s.includes(this[0]) && this[1].test(s);
  2743.   }
  2744.   function starts(s) {
  2745.     return s.startsWith(this);
  2746.   }
  2747.   function startsDomainPrescreen(url) {
  2748.     return url.includes(this[0]) && startsDomain.call(this, url);
  2749.   }
  2750.   function startsDomain(url) {
  2751.     let hostStart = url.indexOf('//');
  2752.     if (hostStart && url[hostStart - 1] !== ':')
  2753.       return;
  2754.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2755.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2756.     const [needle, domain, pinDomainEnd, endSep] = this;
  2757.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2758.     for (; ; start++) {
  2759.       start = host.indexOf(domain, start);
  2760.       if (start < 0)
  2761.         return;
  2762.       if (!start || host[start - 1] === '.')
  2763.         break;
  2764.     }
  2765.     start += hostStart;
  2766.     if (url.lastIndexOf(needle, start) !== start)
  2767.       return;
  2768.     const end = start + needle.length;
  2769.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2770.   }
  2771. })();
  2772.  
  2773. const Util = {
  2774.  
  2775.   addStyle(name, css) {
  2776.     const id = `${PREFIX}style:${name}`;
  2777.     const el = doc.getElementById(id) ||
  2778.                css && $new('style', {id});
  2779.     if (!el) return;
  2780.     if (el.textContent !== css)
  2781.       el.textContent = css;
  2782.     if (el.parentElement !== doc.head)
  2783.       doc.head.appendChild(el);
  2784.     return el;
  2785.   },
  2786.  
  2787.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2788.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2789.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2790.   },
  2791.  
  2792.   decodeHtmlEntities(s) {
  2793.     return s
  2794.       .replace(/&quot;/g, '"')
  2795.       .replace(/&apos;/g, '\'')
  2796.       .replace(/&lt;/g, '<')
  2797.       .replace(/&gt;/g, '>')
  2798.       .replace(/&amp;/g, '&');
  2799.   },
  2800.  
  2801.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2802.   decodeUrl(url) {
  2803.     if (!url || typeof url !== 'string') return url;
  2804.     const iPct = url.indexOf('%');
  2805.     const iColon = url.indexOf(':');
  2806.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2807.       decodeURIComponent(url) :
  2808.       url;
  2809.   },
  2810.  
  2811.   deepEqual(a, b) {
  2812.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2813.       return a === b;
  2814.     if (isArray(a)) {
  2815.       return isArray(b) &&
  2816.         a.length === b.length &&
  2817.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2818.     }
  2819.     const keys = Object.keys(a);
  2820.     return keys.length === Object.keys(b).length &&
  2821.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2822.   },
  2823.  
  2824.   elShown: el => el && el.classList.contains(PREFIX + 'show'),
  2825.  
  2826.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2827.  
  2828.   forceLayout(node) {
  2829.     // eslint-disable-next-line no-unused-expressions
  2830.     node.clientHeight;
  2831.   },
  2832.  
  2833.   formatError(e, rule) {
  2834.     const msg = e.message;
  2835.     const {url: u, imageUrl: iu} = ai;
  2836.     e = msg ? e :
  2837.       e.readyState && 'Request failed.' ||
  2838.       e.type === 'error' && `File can't be displayed.${
  2839.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2840.       }` ||
  2841.       e;
  2842.     let fmt;
  2843.     const res = [
  2844.       fmt = '%c%s%c', 'font-weight:bold', e, 'font-weight:normal',
  2845.       (fmt += '\nNode: %o', ai.node),
  2846.       (fmt += '\nRule: %o', rule),
  2847.       u && (fmt += '\nURL: %s', u),
  2848.       iu && iu !== u && (fmt += '\nFile: %s', iu),
  2849.       e.stack,
  2850.     ].filter(Boolean);
  2851.     res[0] = fmt;
  2852.     res.message = msg || e;
  2853.     return res;
  2854.   },
  2855.  
  2856.   getReactChildren(el, path) {
  2857.     if (isFF) el = el.wrappedJSObject || el;
  2858.     for (const k of Object.keys(el))
  2859.       if (typeof k === 'string' && k.startsWith('__reactProps'))
  2860.         return (el = el[k].children) && (path ? pick(el, path) : el);
  2861.   },
  2862.  
  2863.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2864.  
  2865.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2866.  
  2867.   newFunction(...args) {
  2868.     try {
  2869.       return App.NOP || (trustedScript
  2870.         // eslint-disable-next-line no-eval
  2871.         ? window.eval(trustedScript(`(function anonymous(${args.slice(0, -1).join(',')}){${args.slice(-1)[0]}})`))
  2872.         : new Function(...args)
  2873.       );
  2874.     } catch (e) {
  2875.       if (!RX_EVAL_BLOCKED.test(e.message))
  2876.         throw e;
  2877.       App.NOP = () => {};
  2878.       return App.NOP;
  2879.     }
  2880.   },
  2881.  
  2882.   rel2abs(rel, abs = location.href) {
  2883.     try {
  2884.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2885.         new URL(rel, abs).href;
  2886.     } catch (e) {
  2887.       return rel;
  2888.     }
  2889.   },
  2890.  
  2891.   stringify(...args) {
  2892.     const p = Array.prototype;
  2893.     const {toJSON} = p;
  2894.     if (toJSON) p.toJSON = null;
  2895.     const res = JSON.stringify(...args);
  2896.     if (toJSON) p.toJSON = toJSON;
  2897.     return res;
  2898.   },
  2899.  
  2900.   suppressTooltip() {
  2901.     for (const node of [
  2902.       ai.node.parentNode,
  2903.       ai.node,
  2904.       ai.node.firstElementChild,
  2905.     ]) {
  2906.       const t = (node || 0).title;
  2907.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2908.         ai.tooltip = {node, text: t};
  2909.         node.title = '';
  2910.         break;
  2911.       }
  2912.     }
  2913.   },
  2914.  
  2915.   tabFixUrl() {
  2916.     const {tabfix = App.tabfix} = ai.rule;
  2917.     return tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2918.            flattenHtml(`data:text/html;charset=utf8,
  2919.       <style>
  2920.         body {
  2921.           margin: 0;
  2922.           padding: 0;
  2923.           background: #222;
  2924.         }
  2925.         .fit {
  2926.           overflow: hidden
  2927.         }
  2928.         .fit > img {
  2929.           max-width: 100vw;
  2930.           max-height: 100vh;
  2931.         }
  2932.         body > img {
  2933.           margin: auto;
  2934.           position: absolute;
  2935.           left: 0;
  2936.           right: 0;
  2937.           top: 0;
  2938.           bottom: 0;
  2939.         }
  2940.       </style>
  2941.       <body class=fit>
  2942.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2943.       </body>
  2944.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2945.   },
  2946. };
  2947.  
  2948. async function setup({rule} = {}) {
  2949.   if (!isFunction(doc.body.attachShadow)) {
  2950.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2951.           'You can edit the script\'s storage directly in your userscript manager.');
  2952.     return;
  2953.   }
  2954.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2955.   let uiCfg;
  2956.   let root = (elSetup || 0).shadowRoot;
  2957.   let {blankRuleElement} = setup;
  2958.   /** @type NodeList */
  2959.   const UI = new Proxy({}, {
  2960.     get(_, id) {
  2961.       return root.getElementById(id);
  2962.     },
  2963.   });
  2964.   if (!rule || !elSetup)
  2965.     init(await Config.load({save: true}));
  2966.   if (rule)
  2967.     installRule(rule);
  2968.  
  2969.   function init(data) {
  2970.     uiCfg = data;
  2971.     $remove(elSetup);
  2972.     elSetup = $new('div', {contentEditable: true});
  2973.     root = elSetup.attachShadow({mode: 'open'});
  2974.     root.append(...createSetupElement());
  2975.     initEvents();
  2976.     renderAll();
  2977.     renderCustomScales();
  2978.     renderRules();
  2979.     doc.body.appendChild(elSetup);
  2980.     requestAnimationFrame(() => {
  2981.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elSetup.clientHeight / 4) + 'px';
  2982.     });
  2983.   }
  2984.  
  2985.   function initEvents() {
  2986.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2987.     UI._export.onclick = e => {
  2988.       dropEvent(e);
  2989.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2990.       UI._exportNotification.hidden = false;
  2991.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2992.     };
  2993.     UI._import.onclick = e => {
  2994.       dropEvent(e);
  2995.       const s = prompt('Paste settings:');
  2996.       if (s)
  2997.         init(new Config({data: s}));
  2998.     };
  2999.     UI._install.onclick = setupRuleInstaller;
  3000.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  3001.     UI._reveal.onclick = e => {
  3002.       e.preventDefault();
  3003.       cssApp.hidden = !cssApp.hidden;
  3004.       if (!cssApp.hidden) {
  3005.         if (!cssApp.value) {
  3006.           App.updateStyles();
  3007.           cssApp.value = App.globalStyle.trim();
  3008.           cssApp.setSelectionRange(0, 0);
  3009.         }
  3010.         cssApp.focus();
  3011.       }
  3012.     };
  3013.     UI.start.onchange = function () {
  3014.       UI.delay.closest('label').hidden =
  3015.         UI.preload.closest('label').hidden =
  3016.           this.value !== 'auto';
  3017.     };
  3018.     UI.start.onchange();
  3019.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  3020.     // color
  3021.     for (const el of $$('[type="color"]', root)) {
  3022.       el.oninput = colorOnInput;
  3023.       el.elSwatch = el.nextElementSibling;
  3024.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  3025.       el.elOpacity.elColor = el;
  3026.     }
  3027.     function colorOnInput() {
  3028.       this.elSwatch.style.setProperty('--color',
  3029.         Util.color(this.value, this.elOpacity.valueAsNumber));
  3030.     }
  3031.     // range
  3032.     for (const el of $$('[type="range"]', root)) {
  3033.       el.oninput = rangeOnInput;
  3034.       el.onblur = rangeOnBlur;
  3035.       el.addEventListener('focusin', rangeOnFocus);
  3036.     }
  3037.     function rangeOnBlur(e) {
  3038.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  3039.         this.elEdit.onblur(e);
  3040.     }
  3041.     function rangeOnFocus() {
  3042.       if (this.elEdit) return;
  3043.       const {min, max, step, value} = this;
  3044.       this.elEdit = $new('input', {
  3045.         value, min, max, step,
  3046.         className: 'range-edit',
  3047.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3048.         type: 'number',
  3049.         elRange: this,
  3050.         onblur: rangeEditOnBlur,
  3051.         oninput: rangeEditOnInput,
  3052.       });
  3053.       this.insertAdjacentElement('afterend', this.elEdit);
  3054.     }
  3055.     function rangeOnInput() {
  3056.       this.title = (this.dataset.title || '').replace('$', this.value);
  3057.       if (this.elColor) this.elColor.oninput();
  3058.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3059.     }
  3060.     // range-edit
  3061.     function rangeEditOnBlur(e) {
  3062.       if (e.relatedTarget !== this.elRange) {
  3063.         this.remove();
  3064.         this.elRange.elEdit = null;
  3065.       }
  3066.     }
  3067.     function rangeEditOnInput() {
  3068.       this.elRange.valueAsNumber = this.valueAsNumber;
  3069.       this.elRange.oninput();
  3070.     }
  3071.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3072.     // which may happen since it sees only the outer <div> in the event |target|
  3073.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3074.   }
  3075.  
  3076.   function closeSetup(event) {
  3077.     const isApply = this.id === '_apply';
  3078.     if (event && (this.id === '_ok' || isApply)) {
  3079.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3080.       Ruler.init();
  3081.       Menu.reRegisterAlt();
  3082.       if (isApply) {
  3083.         renderCustomScales();
  3084.         UI._css.textContent = cfg._getCss();
  3085.         return;
  3086.       }
  3087.     }
  3088.     $remove(elSetup);
  3089.     elSetup = null;
  3090.   }
  3091.  
  3092.   function collectConfig({save, clone} = {}) {
  3093.     let data = {};
  3094.     for (const el of $$('input[id], select[id]', root))
  3095.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3096.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3097.           el.value || '';
  3098.     Object.assign(data, {
  3099.       css: UI.css.value.trim(),
  3100.       delay: UI.delay.valueAsNumber * 1000,
  3101.       hosts: collectRules(),
  3102.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3103.       scales: UI.scales.value
  3104.         .trim()
  3105.         .split(/[,;]*\s+/)
  3106.         .map(x => x.replace(',', '.'))
  3107.         .filter(x => !isNaN(parseFloat(x))),
  3108.     });
  3109.     if (clone)
  3110.       data = JSON.parse(Util.stringify(data));
  3111.     return new Config({data, save});
  3112.   }
  3113.  
  3114.   function collectRules() {
  3115.     return [...UI._rules.children]
  3116.       .map(el => [el.value.trim(), el[RULE]])
  3117.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3118.       .map(([s, json]) => json || s)
  3119.       .filter(Boolean);
  3120.   }
  3121.  
  3122.   function checkRule({target: el}) {
  3123.     let json, error, title;
  3124.     const prev = el.previousElementSibling;
  3125.     if (el.value) {
  3126.       json = Ruler.parse(el.value);
  3127.       error = json instanceof Error && (json.message || String(json));
  3128.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3129.         !/^[-.a-z0-9]*$/i.test(json.d);
  3130.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3131.         .filter(Boolean).join('\n');
  3132.       el.classList.toggle('invalid-domain', invalidDomain);
  3133.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3134.       if (!prev)
  3135.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3136.     } else if (prev) {
  3137.       prev.focus();
  3138.       el.remove();
  3139.     }
  3140.     el[RULE] = !error && json;
  3141.     el.title = title;
  3142.     el.setCustomValidity(error || '');
  3143.   }
  3144.  
  3145.   async function focusRule({target: el, relatedTarget: from}) {
  3146.     if (el === this)
  3147.       return;
  3148.     await new Promise(setTimeout);
  3149.     if (el[RULE] && el.rows < 2) {
  3150.       let i = el.selectionStart;
  3151.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3152.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3153.       el.setSelectionRange(i, i);
  3154.       el.rows = txt.match(/^/gm).length;
  3155.     }
  3156.     if (!this.contains(from))
  3157.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3158.   }
  3159.  
  3160.   function installRule(rule) {
  3161.     const inputs = UI._rules.children;
  3162.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3163.     if (!el) {
  3164.       el = inputs[0];
  3165.       el[RULE] = rule;
  3166.       el.value = Ruler.format(rule);
  3167.       el.hidden = false;
  3168.       const i = Math.max(0, collectRules().indexOf(rule));
  3169.       inputs[i].insertAdjacentElement('afterend', el);
  3170.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3171.     }
  3172.     const rect = el.getBoundingClientRect();
  3173.     if (rect.bottom < 0 ||
  3174.         rect.bottom > el.parentNode.offsetHeight)
  3175.       el.scrollIntoView();
  3176.     el.classList.add('highlight');
  3177.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3178.     el.focus();
  3179.   }
  3180.  
  3181.   function renderRules() {
  3182.     const rules = UI._rules;
  3183.     rules.addEventListener('input', checkRule);
  3184.     rules.addEventListener('focusin', focusRule);
  3185.     rules.addEventListener('paste', focusRule);
  3186.     blankRuleElement =
  3187.       setup.blankRuleElement =
  3188.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3189.     for (const rule of uiCfg.hosts || []) {
  3190.       const el = blankRuleElement.cloneNode();
  3191.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3192.       rules.appendChild(el);
  3193.       checkRule({target: el});
  3194.     }
  3195.     const search = UI._search;
  3196.     search.oninput = () => {
  3197.       setup.search = search.value;
  3198.       const s = search.value.toLowerCase();
  3199.       for (const el of rules.children)
  3200.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3201.     };
  3202.     search.value = setup.search || '';
  3203.     if (search.value)
  3204.       search.oninput();
  3205.   }
  3206.  
  3207.   function renderCustomScales() {
  3208.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3209.   }
  3210.  
  3211.   function renderAll() {
  3212.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3213.       if (el.id in uiCfg)
  3214.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3215.     for (const el of $$('input[type="range"]', root))
  3216.       el.oninput();
  3217.     for (const el of $$('a[href^="http"]', root))
  3218.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3219.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3220.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3221.   }
  3222. }
  3223.  
  3224. function setupClickedRule(event) {
  3225.   let rule;
  3226.   const el = event.target.closest('blockquote, code, pre');
  3227.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3228.     dropEvent(event);
  3229.     setup({rule});
  3230.   }
  3231. }
  3232.  
  3233. async function setupRuleInstaller(e) {
  3234.   dropEvent(e);
  3235.   const parent = this.parentElement;
  3236.   parent.children._installLoading.hidden = false;
  3237.   this.remove();
  3238.   let rules;
  3239.  
  3240.   try {
  3241.     rules = extractRules(await Req.getDoc(this.href));
  3242.     const selector = $new('select', {
  3243.       size: 8,
  3244.       style: 'width: 100%',
  3245.       selectedIndex: findMatchingRuleIndex(),
  3246.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3247.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3248.     }, rules.map(renderRule));
  3249.     parent.children._installLoading.remove();
  3250.     parent.children._installHint.hidden = false;
  3251.     parent.appendChild(selector);
  3252.     requestAnimationFrame(() => {
  3253.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3254.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3255.       selector.focus();
  3256.     });
  3257.   } catch (e) {
  3258.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3259.   }
  3260.  
  3261.   function extractRules({doc}) {
  3262.     // sort by name
  3263.     return [...$$('#wiki-body tr', doc)]
  3264.       .map(tr => [
  3265.         tr.cells[0].textContent.trim(),
  3266.         Ruler.fromElement(tr.cells[1]),
  3267.       ])
  3268.       .filter(([name, r]) =>
  3269.         name && r && (!r.d || hostname.includes(r.d)))
  3270.       .sort(([a], [b]) =>
  3271.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3272.           a > b ? 1 :
  3273.             0);
  3274.   }
  3275.  
  3276.   function findMatchingRuleIndex() {
  3277.     const dottedHost = `.${hostname}.`;
  3278.     let maxCount = 0, maxIndex = 0, index = 0;
  3279.     for (const [name, {d}] of rules) {
  3280.       let count = !!(d && hostname.includes(d)) * 10;
  3281.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3282.         count += dottedHost.includes(`.${part}.`) && part.length;
  3283.       if (count > maxCount) {
  3284.         maxCount = count;
  3285.         maxIndex = index;
  3286.       }
  3287.       index++;
  3288.     }
  3289.     return maxIndex;
  3290.   }
  3291.  
  3292.   function renderRule([name, rule]) {
  3293.     return $new('option', {
  3294.       textContent: name,
  3295.       title: Ruler.format(rule, {expand: true})
  3296.         .replace(/^{|\s*}$/g, '')
  3297.         .split('\n')
  3298.         .slice(0, 12)
  3299.         .map(renderTitleLine)
  3300.         .filter(Boolean)
  3301.         .join('\n'),
  3302.     });
  3303.   }
  3304.  
  3305.   function renderTitleLine(line, i, arr) {
  3306.     return (
  3307.       // show ... on 10th line if there are more lines
  3308.       i === 9 && arr.length > 10 ? '...' :
  3309.         i > 10 ? '' :
  3310.           // truncate to 100 chars
  3311.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3312.             // strip the leading space
  3313.             .replace(/^\s/, ''));
  3314.   }
  3315.  
  3316.   function maybeSetup(e) {
  3317.     if (!eventModifiers(e))
  3318.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3319.   }
  3320. }
  3321.  
  3322. const CSS_SETUP = /*language=css*/ `
  3323.   :host {
  3324.     all: initial !important;
  3325.     position: fixed !important;
  3326.     z-index: 2147483647 !important;
  3327.     top: 20px !important;
  3328.     right: 20px !important;
  3329.     padding: 1.5em !important;
  3330.     color: #000 !important;
  3331.     background: #eee !important;
  3332.     box-shadow: 5px 5px 25px 2px #000 !important;
  3333.     width: 33em !important;
  3334.     border: 1px solid black !important;
  3335.     display: flex !important;
  3336.     flex-direction: column !important;
  3337.   }
  3338.   main {
  3339.     font: 12px/15px sans-serif;
  3340.   }
  3341.   table {
  3342.     text-align:left;
  3343.   }
  3344.   ul {
  3345.     max-height: calc(100vh - 200px);
  3346.     margin: 0 0 15px 0;
  3347.     padding: 0;
  3348.     list-style: none;
  3349.   }
  3350.   li {
  3351.     margin: 0;
  3352.     padding: .25em 0;
  3353.   }
  3354.   li.options {
  3355.     display: flex;
  3356.     align-items: center;
  3357.     justify-content: space-between;
  3358.   }
  3359.   li.row {
  3360.     align-items: start;
  3361.     flex-wrap: wrap;
  3362.   }
  3363.   li.row label {
  3364.     display: flex;
  3365.     flex-direction: row;
  3366.     align-items: center;
  3367.   }
  3368.   li.row input {
  3369.     margin-right: .25em;
  3370.   }
  3371.   li.stretch label {
  3372.     flex: 1;
  3373.     white-space: nowrap;
  3374.   }
  3375.   li.stretch label > span {
  3376.     display: flex;
  3377.     flex-direction: row;
  3378.     flex: 1;
  3379.   }
  3380.   label {
  3381.     display: inline-flex;
  3382.     flex-direction: column;
  3383.   }
  3384.   label:not(:last-child) {
  3385.     margin-right: 1em;
  3386.   }
  3387.   input, select {
  3388.     min-height: 1.3em;
  3389.     box-sizing: border-box;
  3390.   }
  3391.   input[type=checkbox] {
  3392.     margin-left: 0;
  3393.   }
  3394.   input[type=number] {
  3395.     width: 4em;
  3396.   }
  3397.   input:not([type=checkbox])  {
  3398.     padding: 0 .25em;
  3399.   }
  3400.   input[type=range] {
  3401.     flex: 1;
  3402.     width: 100%;
  3403.     margin: 0 .25em;
  3404.     padding: 0;
  3405.     filter: saturate(0);
  3406.     opacity: .5;
  3407.   }
  3408.   u + input[type=range] {
  3409.     max-width: 3em;
  3410.   }
  3411.   input[type=range]:hover {
  3412.     filter: none;
  3413.     opacity: 1;
  3414.   }
  3415.   input[type=color] {
  3416.     position: absolute;
  3417.     width: calc(1.5em + 2px);
  3418.     opacity: 0;
  3419.     cursor: pointer;
  3420.   }
  3421.   u {
  3422.     position: relative;
  3423.     flex: 0 0 1.5em;
  3424.     height: 1.5em;
  3425.     border: 1px solid #888;
  3426.     pointer-events: none;
  3427.     color: #888;
  3428.     background-image:
  3429.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3430.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3431.     background-size: .5em .5em;
  3432.     background-position: 0 0, .25em .25em;
  3433.   }
  3434.   u::after {
  3435.     position: absolute;
  3436.     top: 0;
  3437.     left: 0;
  3438.     right: 0;
  3439.     bottom: 0;
  3440.     content: "";
  3441.     background-color: var(--color);
  3442.   }
  3443.   .range-edit {
  3444.     position: absolute;
  3445.     box-shadow: 0 0.25em 1em #000;
  3446.     z-index: 99;
  3447.   }
  3448.   textarea {
  3449.     resize: vertical;
  3450.     margin: 1px 0;
  3451.     font: 11px/1.25 Consolas, monospace;
  3452.   }
  3453.   :invalid {
  3454.     background-color: #f002;
  3455.     border-color: #800;
  3456.   }
  3457.   code {
  3458.     font-weight: bold;
  3459.   }
  3460.   a {
  3461.     text-decoration: none;
  3462.     color: LinkText;
  3463.     cursor: pointer;
  3464.   }
  3465.   a:hover {
  3466.     text-decoration: underline;
  3467.   }
  3468.   button {
  3469.     padding: .2em 1em;
  3470.     margin: 0 1em;
  3471.   }
  3472.   kbd {
  3473.     padding: 1px 6px;
  3474.     font-weight: bold;
  3475.     font-family: Consolas, monospace;
  3476.     border: 1px solid #888;
  3477.     border-radius: 3px;
  3478.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3479.   }
  3480.   .column {
  3481.     display: flex;
  3482.     flex-direction: column;
  3483.   }
  3484.   .highlight {
  3485.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3486.     animation-fill-mode: both;
  3487.   }
  3488.   #_rules > * {
  3489.     word-break: break-all;
  3490.   }
  3491.   #_rules > :not(:focus) {
  3492.     overflow: hidden; /* prevents wrapping in FF */
  3493.   }
  3494.   .invalid-domain {
  3495.     opacity: .5;
  3496.   }
  3497.   .matching-domain {
  3498.     border-color: #56b8ff;
  3499.     background: #d7eaff;
  3500.   }
  3501.   #_x {
  3502.     position: absolute;
  3503.     top: 0;
  3504.     right: 0;
  3505.     padding: 4px 8px;
  3506.     cursor: pointer;
  3507.     user-select: none;
  3508.   }
  3509.   #_x:hover {
  3510.     background-color: #8884;
  3511.   }
  3512.   #_cssApp {
  3513.     color: seagreen;
  3514.   }
  3515.   #_exportNotification {
  3516.     color: green;
  3517.     font-weight: bold;
  3518.     position: absolute;
  3519.     left: 0;
  3520.     right: 0;
  3521.     bottom: 2px;
  3522.   }
  3523.   #_installHint {
  3524.     color: green;
  3525.   }
  3526.   #_usage, #_usage * {
  3527.     font: inherit;
  3528.     color: inherit;
  3529.   }
  3530.   #_usage th, #_usage kbd {
  3531.     font-weight: bold;
  3532.     white-space: pre-line;
  3533.   }
  3534.   @keyframes fade-in {
  3535.     from { background-color: deepskyblue }
  3536.     to {}
  3537.   }
  3538.   @media (prefers-color-scheme: dark) {
  3539.     :host {
  3540.       color: #aaa !important;
  3541.       background: #333 !important;
  3542.     }
  3543.     a {
  3544.       color: deepskyblue;
  3545.     }
  3546.     button {
  3547.       background: linear-gradient(-5deg, #333, #555);
  3548.       border: 1px solid #000;
  3549.       box-shadow: 0 2px 6px #181818;
  3550.       border-radius: 3px;
  3551.       cursor: pointer;
  3552.     }
  3553.     button:hover {
  3554.       background: linear-gradient(-5deg, #333, #666);
  3555.     }
  3556.     textarea, input, select {
  3557.       background: #111;
  3558.       color: #BBB;
  3559.       border: 1px solid #555;
  3560.     }
  3561.     input[type=checkbox] {
  3562.       filter: invert(1);
  3563.     }
  3564.     input[type=range] {
  3565.       filter: invert(1) saturate(0);
  3566.     }
  3567.     input[type=range]:hover {
  3568.       filter: invert(1);
  3569.     }
  3570.     kbd {
  3571.       border-color: #666;
  3572.     }
  3573.     @supports (-moz-appearance: none) {
  3574.       input[type=checkbox],
  3575.       input[type=range],
  3576.       input[type=range]:hover {
  3577.         filter: none;
  3578.       }
  3579.     }
  3580.     .range-edit {
  3581.       box-shadow: 0 .5em 1em .5em #000;
  3582.     }
  3583.     .matching-domain {
  3584.       border-color: #0065af;
  3585.       background: #032b58;
  3586.       color: #ddd;
  3587.     }
  3588.     #_cssApp {
  3589.       color: darkseagreen;
  3590.     }
  3591.     #_installHint {
  3592.       color: greenyellow;
  3593.     }
  3594.     ::-webkit-scrollbar {
  3595.       width: 14px;
  3596.       height: 14px;
  3597.       background: #333;
  3598.     }
  3599.     ::-webkit-scrollbar-button:single-button {
  3600.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3601.     }
  3602.     ::-webkit-scrollbar-track-piece {
  3603.       background: #444;
  3604.       border: 4px solid #333;
  3605.       border-radius: 8px;
  3606.     }
  3607.     ::-webkit-scrollbar-thumb {
  3608.       border: 3px solid #333;
  3609.       border-radius: 8px;
  3610.       background: #666;
  3611.     }
  3612.     ::-webkit-resizer {
  3613.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3614.       border: 2px solid transparent;
  3615.     }
  3616.   }
  3617. `;
  3618.  
  3619. function createSetupElement() {
  3620.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3621.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3622.   const $newLink = (text, href, props) =>
  3623.     $new('a', Object.assign({target: '_blank'}, href && {href}, props), text);
  3624.   const $newCheck = (label, id, title = '', props) =>
  3625.     $new('label', Object.assign({title}, props), [
  3626.       $new('input', {id, type: 'checkbox'}),
  3627.       label,
  3628.     ]);
  3629.   const $newKbd = (str, tag = 'fragment') =>
  3630.     $new(tag, str.split(/({.+?})/).map(s => s[0] === '{' ? $new('kbd', s.slice(1, -1)) : s));
  3631.   const $newRange = (id, title = '', min = 0, max = 100, step = 1, type = 'range') =>
  3632.     $new('input', {id, min, max, step, type, 'data-title': title});
  3633.   const $newSelect = (label, id, values) =>
  3634.     $new('label', [
  3635.       label,
  3636.       $new('select', {id}, Object.entries(values).map(([k, v]) =>
  3637.         $new('option', Object.assign({value: k}, typeof v === 'object' ? v : {textContent: v})))),
  3638.     ]);
  3639.   const $newTable = obj =>
  3640.     $new('table#_usage', Object.entries(obj).map(([name, val]) =>
  3641.       $new('tr', name.startsWith('---') ? $new('td', '\xA0') : [
  3642.         $new('th', name),
  3643.         ...ensureArray(val).map(cell => cell instanceof Node ? cell : $newKbd(cell, 'td')),
  3644.       ])));
  3645.   return [
  3646.     $new('style', CSS_SETUP),
  3647.     $new('style#_css', cfg._getCss()),
  3648.     $new(`main#${PREFIX}setup`, [
  3649.       $new('div#_x', 'x'),
  3650.       $new('ul.column', [
  3651.         $new('details', {style: 'order: 1'}, [
  3652.           $new('summary', {style: 'cursor: pointer'},
  3653.             $new('b', 'Help & hotkeys')),
  3654.           $newTable({
  3655.             'Activate': 'move mouse cursor over thumbnail',
  3656.             'Deactivate': 'move cursor off thumbnail, or click, or zoom out fully',
  3657.             'Prevent/freeze': 'hold down {Shift} while entering/leaving thumbnail',
  3658.             'Force-activate\n(videos or small pics)': 'hold {Ctrl} while entering image element',
  3659.             '---1': '',
  3660.             'Start zooming':
  3661.               'configurable: automatic or via right-click / {Shift} while popup is visible',
  3662.             'Zoom': 'mouse wheel',
  3663.             'Rotate': '{L} {r} keys (left or right)',
  3664.             'Flip/mirror': '{h} {v} keys (horizontally or vertically)',
  3665.             'Previous/next\nin album': 'mouse wheel, {j} {k} or {←} {→} keys',
  3666.             'Night mode toggle': '{n} key',
  3667.             '---2': '',
  3668.           }),
  3669.           $newTable({
  3670.             'Antialiasing on/off': ['{a}', $new('td', {rowSpan: 4}, 'key while popup is visible')],
  3671.             'Download': '{d}',
  3672.             'Info on/off': '{i}',
  3673.             'Mute/unmute': '{m}',
  3674.             'Open in tab': '{t}',
  3675.           }),
  3676.         ]),
  3677.         $new('li.options.stretch', [
  3678.           $newSelect('Popup shows on', 'start', {
  3679.             context: 'Right-click / \u2261 / Ctrl',
  3680.             contextMK: 'Right-click / \u2261',
  3681.             contextM: 'Right-click',
  3682.             contextK: {
  3683.               textContent: '\u2261 key',
  3684.               title: '\u2261 is the Menu key (near the right Ctrl)',
  3685.             },
  3686.             ctrl: 'Ctrl',
  3687.             auto: 'automatically',
  3688.           }),
  3689.           $new('label', ['after, sec', $newRange('delay', 'seconds', .05, 10, .05, 'number')]),
  3690.           $new('label', {title: '(if the full version of the hovered image is ...% larger)'},
  3691.             ['if larger, %', $newRange('scale', null, 0, 100, 1, 'number')]),
  3692.           $newSelect('Zoom activates on', 'zoom', {
  3693.             context: 'Right click / Shift',
  3694.             wheel: 'Wheel up / Shift',
  3695.             shift: 'Shift',
  3696.             auto: 'automatically',
  3697.           }),
  3698.           $newSelect('...and zooms to', 'fit', {
  3699.             'all': 'fit to window',
  3700.             'large': 'fit if larger',
  3701.             'no': '100%',
  3702.             '': {textContent: 'custom', title: 'Use custom scale factors'},
  3703.           }),
  3704.         ]),
  3705.         $new('li.options', [
  3706.           $new('label', ['Zoom step, %', $newRange('zoomStep', null, 100, 400, 1, 'number')]),
  3707.           $newSelect('When fully zoomed out:', 'zoomOut', {
  3708.             stay: 'stay in zoom mode',
  3709.             auto: 'stay if still hovered',
  3710.             unzoom: 'undo zoom mode',
  3711.             close: 'close popup',
  3712.           }),
  3713.           $new('label', {
  3714.             style: 'flex: 1',
  3715.             title: `
  3716.               Scale factors to use when “zooms to” selector is set to “custom”.
  3717.               0 = fit to window,
  3718.               0! = same as 0 but also removes smaller values,
  3719.               * after a value marks the default zoom factor, for example: 1*
  3720.               The popup won't shrink below the image's natural size or window size for bigger mages.
  3721.               ${scalesHint}
  3722.             `.trim().replace(/\n\s+/g, '\r'),
  3723.           }, ['Custom scale factors:', $new('input#scales', {placeholder: scalesHint})]),
  3724.         ]),
  3725.         $new('li.options.row', [
  3726.           $new([
  3727.             $newCheck('Centered*', 'center',
  3728.               '...or try to keep the original link/thumbnail unobscured by the popup'),
  3729.             $newCheck('Preload on hover*', 'preload',
  3730.               'Provides smoother experience but increases network traffic'),
  3731.             $newCheck('Require Ctrl key for video', 'videoCtrl'),
  3732.             $newCheck('Mute videos*', 'mute', 'Hotkey: "m" in the popup'),
  3733.             $newCheck('Keep playing video*', 'keepVids',
  3734.               '...until you press Esc key or click elsewhere'),
  3735.             $newCheck('Keep preview on blur*', 'keepOnBlur',
  3736.               'i.e. when mouse pointer moves outside the page'),
  3737.           ]),
  3738.           $new([
  3739.             $newCheck('Wait for complete image*', 'waitLoad',
  3740.               '...or immediately show a partial image while still loading'),
  3741.             $new({style: 'display:flex; align-items:center'}, [
  3742.               $newCheck('Show info for', 'uiInfo', 'Hotkey: "i" (or hold "Shift") in the popup'),
  3743.               $new('input#uiInfoHide', {min: 1, step: 'any', type: 'number'}),
  3744.               'sec',
  3745.             ]),
  3746.             $newCheck('Show info only at start*', 'uiInfoOnce', '...or every time the info changes'),
  3747.             $newCheck('Fade-in transition', 'uiFadein'),
  3748.             $newCheck('Fade-in transition in gallery', 'uiFadeinGallery'),
  3749.           ]),
  3750.           $new([
  3751.             $newCheck('Night mode*', 'night', 'Hotkey: "n" in the popup'),
  3752.             $newCheck('Run in image tabs', 'imgtab'),
  3753.             $newCheck('Spoof hotlinking*', 'xhr',
  3754.               'Disable only if you spoof the HTTP headers yourself'),
  3755.             $newCheck('Set status on <html>*', 'globalStatus',
  3756.               "Causes slowdowns so don't enable unless you explicitly use it in your custom CSS"),
  3757.             $newCheck('Auto-start switch in menu*', 'startAltShown',
  3758.               "Show a switch for 'auto-start' mode in userscript manager menu"),
  3759.           ]),
  3760.         ]),
  3761.         $new('li.options.stretch', [
  3762.           $new('label', [
  3763.             'Background',
  3764.             $new('span', [
  3765.               $new('input#uiBackgroundColor', {type: 'color'}), $new('u'),
  3766.               $newRange('uiBackgroundOpacity', 'Opacity: $%'),
  3767.             ]),
  3768.           ]),
  3769.           $new('label', [
  3770.             'Border color, opacity, size',
  3771.             $new('span', [
  3772.               $new('input#uiBorderColor', {type: 'color'}), $new('u'),
  3773.               $newRange('uiBorderOpacity', 'Opacity: $%'),
  3774.               $newRange('uiBorder', 'Border size: $px', 0, 20),
  3775.             ]),
  3776.           ]),
  3777.           $new('label', [
  3778.             'Shadow color, opacity, size',
  3779.             $new('span', [
  3780.               $new('input#uiShadowColor', {type: 'color'}), $new('u'),
  3781.               $newRange('uiShadowOpacity', 'Opacity: $%'),
  3782.               $newRange('uiShadow', 'Shadow blur radius: $px\n"0" disables the shadow.', 0, 20),
  3783.             ]),
  3784.           ]),
  3785.           $new('label', ['Padding', $new('span', $newRange('uiPadding', 'Padding: $px'))]),
  3786.           $new('label', ['Margin', $new('span', $newRange('uiMargin', 'Margin: $px'))]),
  3787.         ]),
  3788.         $new('li', [
  3789.           $newLink('Custom CSS:', `${MPIV_BASE_URL}Custom-CSS`),
  3790.           ' e.g. ', $new('b', '#mpiv-popup { animation: none !important }'),
  3791.           $newLink('View the built-in CSS', '', {
  3792.             id: '_reveal',
  3793.             tabIndex: 0,
  3794.             style: 'float: right',
  3795.             title: 'You can copy parts of it to override them in your custom CSS',
  3796.           }),
  3797.           $new('.column', [
  3798.             $new('textarea#css', {spellcheck: false}),
  3799.             $new('textarea#_cssApp', {spellcheck: false, hidden: true, readOnly: true, rows: 30}),
  3800.           ]),
  3801.         ]),
  3802.         $new('li', {style: 'display: flex; justify-content: space-between;'}, [
  3803.           $new('div',
  3804.             $newLink('Custom host rules:', `${MPIV_BASE_URL}Custom-host-rules`)),
  3805.           $new('div', {style: 'white-space: pre-line'}, [
  3806.             'To disable, put any symbol except ', $new('code', 'a..z 0..9 - .'),
  3807.             '\nin "d" value, for example ', $new('code', '"d": "!foo.com"'),
  3808.           ]),
  3809.           $new('div',
  3810.             $new('input#_search',
  3811.               {type: 'search', placeholder: 'Search', style: 'width: 10em; margin-left: 1em'})),
  3812.         ]),
  3813.         $new('li', {
  3814.           style: 'margin-left: -3px; margin-right: -3px; overflow-y: auto; ' +
  3815.                  'padding-left: 3px; padding-right: 3px;',
  3816.         }, [
  3817.           $new('div#_rules.column',
  3818.             $new('textarea', {spellcheck: false, rows: 1})),
  3819.         ]),
  3820.         $new('li', [
  3821.           $new('div#_installLoading', {hidden: true}, 'Loading...'),
  3822.           $new('div#_installHint', {hidden: true}, [
  3823.             'Double-click the rule (or select and press Enter) to add it. ',
  3824.             'Click ', $new('code', 'Apply'), ' or ', $new('code', 'OK'), ' to confirm.',
  3825.           ]),
  3826.           $newLink('Install rule from repository...', `${MPIV_BASE_URL}Rules`, {id: '_install'}),
  3827.         ]),
  3828.       ]),
  3829.       $new('div', {style: 'text-align:center'}, [
  3830.         $new('button#_ok', {accessKey: 'o'}, 'OK'),
  3831.         $new('button#_apply', {accessKey: 'a'}, 'Apply'),
  3832.         $new('button#_import', {style: 'margin-right: 0'}, 'Import'),
  3833.         $new('button#_export', {style: 'margin-left: 0'}, 'Export'),
  3834.         $new('button#_cancel', 'Cancel'),
  3835.         $new('div#_exportNotification', {hidden: true}, 'Copied to clipboard'),
  3836.       ]),
  3837.     ]),
  3838.   ];
  3839. }
  3840.  
  3841. function createGlobalStyle() {
  3842.   App.globalStyle = /*language=CSS*/ (String.raw`
  3843. #\mpiv-bar {
  3844.   position: fixed;
  3845.   z-index: 2147483647;
  3846.   top: 0;
  3847.   left: 0;
  3848.   right: 0;
  3849.   text-align: center;
  3850.   font-family: sans-serif;
  3851.   font-size: 15px;
  3852.   font-weight: bold;
  3853.   background: #0005;
  3854.   color: white;
  3855.   padding: 4px 10px;
  3856.   text-shadow: .5px .5px 2px #000;
  3857.   transition: opacity 1s ease .25s;
  3858.   opacity: 0;
  3859. }
  3860. #\mpiv-bar[data-force] {
  3861.   transition: none;
  3862. }
  3863. #\mpiv-bar.\mpiv-show {
  3864.   opacity: 1;
  3865. }
  3866. #\mpiv-bar[data-zoom]::after {
  3867.   content: " (" attr(data-zoom) ")";
  3868.   opacity: .8;
  3869. }
  3870. #\mpiv-popup.\mpiv-show {
  3871.   display: inline;
  3872. }
  3873. #\mpiv-popup {
  3874.   display: none;
  3875.   cursor: none;
  3876. ${cfg.uiFadein ? String.raw`
  3877.   animation: .2s \mpiv-fadein both;
  3878.   transition: box-shadow .25s, background-color .25s;
  3879.   ` : ''}
  3880. ${App.popupStyleBase = `
  3881.   border: none;
  3882.   box-sizing: border-box;
  3883.   background-size: cover;
  3884.   position: fixed;
  3885.   z-index: 2147483647;
  3886.   padding: 0;
  3887.   margin: 0;
  3888.   top: 0;
  3889.   left: 0;
  3890.   width: auto;
  3891.   height: auto;
  3892.   transform-origin: center;
  3893.   max-width: none;
  3894.   max-height: none;
  3895. `}
  3896. }
  3897. #\mpiv-popup.\mpiv-show {
  3898.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3899.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3900.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3901.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3902. }
  3903. #\mpiv-popup.\mpiv-show[loaded] {
  3904.   background-color: ${Util.color('Background')};
  3905.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3906. }
  3907. #\mpiv-popup[data-gallery-flip] {
  3908.   animation: none;
  3909.   transition: none;
  3910. }
  3911. #\mpiv-popup[${NOAA_ATTR}],
  3912. #\mpiv-popup.\mpiv-zoom-max {
  3913.   image-rendering: pixelated;
  3914. }
  3915. #\mpiv-popup.\mpiv-night:not(#\\0) {
  3916.   box-shadow: 0 0 0 9999px #000;
  3917. }
  3918. body:has(#\mpiv-popup.\mpiv-night)::-webkit-scrollbar {
  3919.   background: #000;
  3920. }
  3921. #\mpiv-setup {
  3922. }
  3923. @keyframes \mpiv-fadein {
  3924.   from {
  3925.     opacity: 0;
  3926.     border-color: transparent;
  3927.   }
  3928.   to {
  3929.     opacity: 1;
  3930.   }
  3931. }
  3932. ` + (cfg.globalStatus ? String.raw`
  3933. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3934.   cursor: progress !important;
  3935. }
  3936. :root.\mpiv-edge #\mpiv-popup {
  3937.   cursor: default;
  3938. }
  3939. :root.\mpiv-error *:hover {
  3940.   cursor: not-allowed !important;
  3941. }
  3942. :root.\mpiv-ready *:hover,
  3943. :root.\mpiv-large *:hover {
  3944.   cursor: zoom-in !important;
  3945. }
  3946. :root.\mpiv-shift *:hover {
  3947.   cursor: default !important;
  3948. }
  3949. ` : String.raw`
  3950. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3951.   cursor: progress;
  3952. }
  3953. [\mpiv-status~="edge"]:hover {
  3954.   cursor: default;
  3955. }
  3956. [\mpiv-status~="error"]:hover {
  3957.   cursor: not-allowed;
  3958. }
  3959. [\mpiv-status~="ready"]:hover,
  3960. [\mpiv-status~="large"]:hover {
  3961.   cursor: zoom-in;
  3962. }
  3963. [\mpiv-status~="shift"]:hover {
  3964.   cursor: default;
  3965. }
  3966. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3967.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3968.   return App.globalStyle;
  3969. }
  3970.  
  3971. //#region Global utilities
  3972.  
  3973. const clamp = (v, min, max) =>
  3974.   v < min ? min : v > max ? max : v;
  3975.  
  3976. const compareNumbers = (a, b) =>
  3977.   a - b;
  3978.  
  3979. const flattenHtml = str =>
  3980.   str.trim().replace(/\n\s*/g, '');
  3981.  
  3982. const dropEvent = e =>
  3983.   (e.preventDefault(), e.stopPropagation());
  3984.  
  3985. const ensureArray = v =>
  3986.   isArray(v) ? v : [v];
  3987.  
  3988. /** @param {KeyboardEvent} e */
  3989. const eventModifiers = e =>
  3990.   (e.altKey ? '!' : '') +
  3991.   (e.ctrlKey ? '^' : '') +
  3992.   (e.metaKey ? '#' : '') +
  3993.   (e.shiftKey ? '+' : '');
  3994.  
  3995. /** @param {KeyboardEvent} e */
  3996. const describeKey = e => eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  3997.  
  3998. const isFunction = val => typeof val === 'function';
  3999.  
  4000. const isVideo = el => el && el.tagName === 'VIDEO';
  4001.  
  4002. const now = performance.now.bind(performance);
  4003.  
  4004. const sumProps = (...props) => {
  4005.   let sum = 0;
  4006.   for (const p of props)
  4007.     sum += parseFloat(p) || 0;
  4008.   return sum;
  4009. };
  4010.  
  4011. const tryCatch = (fn, ...args) => {
  4012.   try {
  4013.     return fn(...args);
  4014.   } catch (e) {}
  4015. };
  4016.  
  4017. const tryJSON = str =>
  4018.   tryCatch(JSON.parse, str);
  4019.  
  4020. const pick = (obj, path, fn) => {
  4021.   if (obj && path)
  4022.     for (const p of path.split('.'))
  4023.       if (obj) obj = obj[p]; else break;
  4024.   return fn && obj !== undefined ? fn(obj) : obj;
  4025. };
  4026.  
  4027. const $ = (sel, node = doc) =>
  4028.   node.querySelector(sel) || false;
  4029.  
  4030. const $$ = (sel, node = doc) =>
  4031.   node.querySelectorAll(sel);
  4032.  
  4033. const $new = (sel, props, children) => {
  4034.   if (typeof sel !== 'string') {
  4035.     children = props;
  4036.     props = sel;
  4037.     sel = '';
  4038.   }
  4039.   if (!children && props != null && ({}).toString.call(props) !== '[object Object]') {
  4040.     children = props;
  4041.     props = null;
  4042.   }
  4043.   const isFrag = sel === 'fragment';
  4044.   const [, tag, id, cls] = sel.match(/^(\w*)(?:#([^.]+))?(?:\.(.+))?$/);
  4045.   const el = isFrag ? doc.createDocumentFragment() : doc.createElement(tag || 'div');
  4046.   if (id) el.id = id;
  4047.   if (cls) el.className = cls.replace(/\./g, ' ');
  4048.   if (props) {
  4049.     for (const [k, v] of Object.entries(props)) {
  4050.       if (!k.startsWith('data-')) {
  4051.         el[k] = v;
  4052.       } else if (v != null) {
  4053.         el.setAttribute(k, v);
  4054.       }
  4055.     }
  4056.   }
  4057.   if (children != null) {
  4058.     if (isArray(children))
  4059.       el.append(...children.filter(Boolean));
  4060.     else if (children instanceof Node)
  4061.       el.appendChild(children);
  4062.     else
  4063.       el.textContent = children;
  4064.   }
  4065.   return el;
  4066. };
  4067.  
  4068. const $css = (el, props) =>
  4069.   Object.entries(props).forEach(([k, v]) =>
  4070.     el.style.setProperty(k, v, 'important'));
  4071.  
  4072. const $parseHtml = str =>
  4073.   new DOMParser().parseFromString(str, 'text/html');
  4074.  
  4075. const $many = (q, doc) => {
  4076.   for (const selector of ensureArray(q)) {
  4077.     const el = selector && $(selector, doc);
  4078.     if (el)
  4079.       return el;
  4080.   }
  4081. };
  4082.  
  4083. const $prop = (sel, prop, node = doc) =>
  4084.   (node = $(sel, node)) && node[prop] || '';
  4085.  
  4086. const $propUp = (node, prop) =>
  4087.   (node = node.closest(`[${prop}]`)) &&
  4088.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  4089.   '';
  4090.  
  4091. const $remove = node =>
  4092.   node && node.remove();
  4093.  
  4094. const $dataset = ({dataset: d}, key, val) =>
  4095.   val == null ? delete d[key] : (d[key] = val);
  4096.  
  4097. //#endregion
  4098. //#region Init
  4099.  
  4100. (async () => {
  4101.   cfg = await Config.load({save: true});
  4102.   if (!doc.body) {
  4103.     await new Promise(resolve =>
  4104.       new MutationObserver((_, mo) => doc.body && (mo.disconnect(), resolve()))
  4105.         .observe(document, {subtree: true, childList: true}));
  4106.   }
  4107.   const el = doc.body.firstElementChild;
  4108.   if (el) {
  4109.     App.isImageTab = el === doc.body.lastElementChild && el.matches('img, video');
  4110.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  4111.   }
  4112.   if (Menu) Menu.register();
  4113.   addEventListener('mouseover', Events.onMouseOver, true);
  4114.   addEventListener('contextmenu', Events.onContext, true);
  4115.   addEventListener('keydown', Events.onKeyDown, true);
  4116.   addEventListener('visibilitychange', Events.onVisibility, true);
  4117.   addEventListener('blur', Events.onVisibility, true);
  4118.   if (['greasyfork.org', 'github.com'].includes(hostname))
  4119.     addEventListener('click', setupClickedRule, true);
  4120.   addEventListener('message', App.onMessage, true);
  4121. })();
  4122.  
  4123. if (window.trustedTypes) {
  4124.   const TT = window.trustedTypes;
  4125.   const CP = 'createPolicy';
  4126.   const createPolicy = TT[CP];
  4127.   TT[CP] = function ovr(name, opts) {
  4128.     let fn;
  4129.     const p = createPolicy.call(TT, name, opts);
  4130.     if ((trustedHTML || opts[fn = 'createHTML'] && (trustedHTML = p[fn].bind(p))) &&
  4131.         (trustedScript || opts[fn = 'createScript'] && (trustedScript = p[fn].bind(p))) &&
  4132.         TT[CP] === ovr)
  4133.       TT[CP] = createPolicy;
  4134.     return p;
  4135.   };
  4136. }
  4137.  
  4138. //#endregion