☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2024-05-19 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5. //
  6. // @include     *
  7. // @run-at      document-start
  8. //
  9. // @grant       GM_addElement
  10. // @grant       GM_download
  11. // @grant       GM_getValue
  12. // @grant       GM_getValues
  13. // @grant       GM_openInTab
  14. // @grant       GM_registerMenuCommand
  15. // @grant       GM_unregisterMenuCommand
  16. // @grant       GM_setClipboard
  17. // @grant       GM_setValue
  18. // @grant       GM_xmlhttpRequest
  19. //
  20. // @grant       GM.getValue
  21. // @grant       GM.openInTab
  22. // @grant       GM.registerMenuCommand
  23. // @grant       GM.unregisterMenuCommand
  24. // @grant       GM.setClipboard
  25. // @grant       GM.setValue
  26. // @grant       GM.xmlHttpRequest
  27. //
  28. // @version     1.3.1
  29. // @author      tophf
  30. //
  31. // @original-version 2017.9.29
  32. // @original-author  kuehlschrank
  33. //
  34. // @connect     *
  35. // CSP check:
  36. // @connect     self
  37. // rule installer in config dialog:
  38. // @connect     github.com
  39. // big/trusted hostings for the built-in rules with "q":
  40. // @connect     deviantart.com
  41. // @connect     facebook.com
  42. // @connect     fbcdn.com
  43. // @connect     flickr.com
  44. // @connect     gfycat.com
  45. // @connect     googleusercontent.com
  46. // @connect     gyazo.com
  47. // @connect     imgur.com
  48. // @connect     instagr.am
  49. // @connect     instagram.com
  50. // @connect     prnt.sc
  51. // @connect     prntscr.com
  52. // @connect     user-images.githubusercontent.com
  53. //
  54. // @supportURL  https://github.com/tophf/mpiv/issues
  55. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  56. // ==/UserScript==
  57.  
  58. 'use strict';
  59.  
  60. //#region Globals
  61.  
  62. /** @type mpiv.Config */
  63. let cfg;
  64. /** @type mpiv.AppInfo */
  65. let ai = {rule: {}};
  66. /** @type Element */
  67. let elSetup;
  68. let nonce;
  69.  
  70. const doc = document;
  71. const hostname = location.hostname;
  72. const dotDomain = '.' + hostname;
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75. const {from: arrayFrom, isArray} = Array;
  76.  
  77. const PREFIX = 'mpiv-';
  78. const NOAA_ATTR = 'data-no-aa';
  79. const STATUS_ATTR = `${PREFIX}status`;
  80. const MSG = Object.assign({}, ...[
  81.   'getViewSize',
  82.   'viewSize',
  83. ].map(k => ({[k]: `${PREFIX}${k}`})));
  84. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  85. // time for volatile things to settle down meanwhile we postpone action
  86. // examples: loading image from cache, quickly moving mouse over one element to another
  87. const SETTLE_TIME = 50;
  88. // used to detect JS code in host rules
  89. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  90. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  91. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  92. const ZOOM_MAX = 16;
  93. const SYM_U = Symbol('u');
  94. const FN_ARGS = {
  95.   s: ['m', 'node', 'rule'],
  96.   c: ['text', 'doc', 'node', 'rule'],
  97.   q: ['text', 'doc', 'node', 'rule'],
  98.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  99. };
  100. let trustedHTML, trustedScript;
  101. //#endregion
  102. //#region GM4 polyfill
  103.  
  104. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  105.   this.GM = {__proto__: null, info: GM_info};
  106. if (!GM.getValue)
  107.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  108. if (!GM.setValue)
  109.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  110. if (!GM.openInTab)
  111.   GM.openInTab = GM_openInTab;
  112. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  113.   GM.registerMenuCommand = GM_registerMenuCommand;
  114. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  115.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  116. if (!GM.setClipboard)
  117.   GM.setClipboard = GM_setClipboard;
  118. if (!GM.xmlHttpRequest)
  119.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  120.  
  121. //#endregion
  122.  
  123. const App = {
  124.  
  125.   isEnabled: true,
  126.   isImageTab: false,
  127.   globalStyle: '',
  128.   popupStyleBase: '',
  129.   tabfix: /\.(dumpoir|greatfon|picuki)\.com$/.test(dotDomain),
  130.   NOP: /\.(facebook|instagram|chrome|google)\.com$/.test(dotDomain) &&
  131.     (() => {}),
  132.  
  133.   activate(info, event) {
  134.     const {match, node, rule, url} = info;
  135.     const auto = cfg.start === 'auto';
  136.     const vidCtrl = cfg.videoCtrl && isVideo(node);
  137.     if (elSetup) console.info({node, rule, url, match});
  138.     if (auto && vidCtrl && !Events.ctrl)
  139.       return;
  140.     if (ai.node) App.deactivate();
  141.     ai = info;
  142.     ai.force = Events.ctrl;
  143.     ai.gNum = 0;
  144.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  145.     Util.suppressTooltip();
  146.     Calc.updateViewSize();
  147.     Events.ctrl = false;
  148.     Events.toggle(true);
  149.     Events.trackMouse(event);
  150.     if (ai.force && (auto || cfg.start === 'ctrl' || cfg.start === 'context')) {
  151.       App.start();
  152.     } else if (auto && !vidCtrl && !rule.manual) {
  153.       App.belate();
  154.     } else {
  155.       Status.set('ready');
  156.     }
  157.   },
  158.  
  159.   belate() {
  160.     if (cfg.preload) {
  161.       ai.preloadStart = now();
  162.       App.start();
  163.       Status.set('+preloading');
  164.       setTimeout(Status.set, cfg.delay, '-preloading');
  165.     } else {
  166.       ai.timer = setTimeout(App.start, cfg.delay);
  167.     }
  168.   },
  169.  
  170.   checkProgress({start} = {}) {
  171.     const p = ai.popup;
  172.     if (!p)
  173.       return;
  174.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  175.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  176.     if (h)
  177.       return App.canCommit(w, h);
  178.     if (start) {
  179.       clearInterval(ai.timerProgress);
  180.       ai.timerProgress = setInterval(App.checkProgress, 150);
  181.     }
  182.   },
  183.  
  184.   canClose: (p = ai.popup) => !p || (
  185.     isVideo(p)
  186.       ? !cfg.keepVids
  187.       : document.fullscreenElement !== p
  188.   ),
  189.  
  190.   canCommit(w, h) {
  191.     if (!ai.force && ai.rect && !ai.gItems &&
  192.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  193.       App.deactivate();
  194.       return false;
  195.     }
  196.     App.stopTimers();
  197.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  198.     if (wait > 0) {
  199.       ai.timer = setTimeout(App.checkProgress, wait);
  200.     } else if ((!w || !h) && (ai.urls || []).length) {
  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(true);
  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: ${url}`;
  339.         Object.assign(ai, info);
  340.         App.startSingle();
  341.       } else {
  342.         Popup.create(url, finalUrl);
  343.         Ruler.runC(responseText, doc);
  344.       }
  345.     } catch (e) {
  346.       App.handleError(e);
  347.     }
  348.   },
  349.  
  350.   async startGallery() {
  351.     Status.loading();
  352.     try {
  353.       const startUrl = ai.url;
  354.       const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
  355.       const items = await new Promise(cb => {
  356.         const res = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node, cb);
  357.         if (res !== undefined) cb(res);
  358.       });
  359.       // bail out if the gallery's async callback took too long
  360.       if (ai.url !== startUrl) return;
  361.       ai.gNum = items.length;
  362.       ai.gItems = items.length && items;
  363.       if (ai.gItems) {
  364.         const i = items.index;
  365.         ai.gIndex = i >= 0 && items[i] ? +i :
  366.           Gallery.findIndex(typeof i === 'string' ? i : ai.url);
  367.         setTimeout(Gallery.next);
  368.       } else {
  369.         throw 'Empty gallery';
  370.       }
  371.     } catch (e) {
  372.       App.handleError(e);
  373.     }
  374.   },
  375.  
  376.   stopTimers(bar) {
  377.     for (const timer of ['timer', 'timerStatus', bar && 'timerBar'])
  378.       clearTimeout(ai[timer]);
  379.     clearInterval(ai.timerProgress);
  380.   },
  381.  
  382.   toggleZoom({keepScale} = {}) {
  383.     const p = ai.popup;
  384.     if (!p || !ai.scales || ai.scales.length < 2)
  385.       return;
  386.     ai.zoomed = !ai.zoomed;
  387.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  388.     if (ai.zooming)
  389.       p.classList.add(`${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.     ai.barText = label;
  414.     App.updateStyles();
  415.     Bar.updateDetails();
  416.     Bar.setText(cfg.uiInfoCaption ? label : '');
  417.     setTimeout(Bar.show, 0, force);
  418.     if (!b.parentNode) {
  419.       doc.body.appendChild(b);
  420.       Util.forceLayout(b);
  421.     }
  422.   },
  423.  
  424.   setText(text) {
  425.     if (/<([a-z][-a-z]*)[^<>]*>[^<>]*<\/\1\s*>/i.test(text)) { // checking for <tag...>...</tag>
  426.       ai.bar.innerHTML = trustedHTML ? trustedHTML(text) : text;
  427.     } else {
  428.       ai.bar.textContent = text;
  429.     }
  430.   },
  431.  
  432.   show(force) {
  433.     const b = ai.bar;
  434.     if (!force && (!cfg.uiInfo || force !== 0 && cfg.uiInfoOnce) || Util.elShown(b))
  435.       return;
  436.     clearTimeout(ai.timerBar);
  437.     b.classList.add(PREFIX + 'show');
  438.     $dataset(b, 'force', force === 2 ? '' : null);
  439.     ai.timerBar = !force && setTimeout(Bar.hide, cfg.uiInfoHide * 1000);
  440.   },
  441.  
  442.   hide(force) {
  443.     const b = ai.bar;
  444.     if (!b || !force && (!cfg.uiInfo || b.dataset.force) || !Util.elShown(b))
  445.       return;
  446.     $dataset(b, 'force', force === 2 ? '' : null);
  447.     b.classList.remove(PREFIX + 'show');
  448.   },
  449.  
  450.   updateName() {
  451.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  452.     if (gi) {
  453.       const item = gi[i];
  454.       const noDesc = !gi.some(_ => _.desc);
  455.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  456.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  457.         item.desc,
  458.       ].filter(Boolean).join(' - ')}`;
  459.       Bar.set(c.trim() || ' ', 'gallery', true);
  460.     } else if ('caption' in ai) {
  461.       Bar.set(ai.caption, 'caption');
  462.     } else if (ai.tooltip) {
  463.       Bar.set(ai.tooltip.text, 'tooltip');
  464.     } else {
  465.       Bar.set(' ', 'info');
  466.     }
  467.   },
  468.  
  469.   updateDetails() {
  470.     if (!ai.bar) return;
  471.     const r = ai.rotate;
  472.     const zoom = ai.nwidth && `${
  473.       Math.round(ai.scale * 100)
  474.     }%${
  475.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  476.     }${
  477.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  478.     }, ${
  479.       ai.nwidth
  480.     } x ${
  481.       ai.nheight
  482.     } px, ${
  483.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  484.     } MP, ${
  485.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  486.     }`.replace(/\x20/g, '\xA0');
  487.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  488.       $dataset(ai.bar, 'zoom', zoom || null);
  489.       Bar.show();
  490.     }
  491.   },
  492. };
  493.  
  494. const Calc = {
  495.  
  496.   aspectRatio(w, h) {
  497.     for (let rat = w / h, a, b = 0; ;) {
  498.       b++;
  499.       a = Math.round(w * b / h);
  500.       if (a > 10 && b > 10 || a > 100 || b > 100)
  501.         return rat.toFixed(2);
  502.       if (Math.abs(a / b - rat) < .01)
  503.         return `${a}:${b}`;
  504.     }
  505.   },
  506.  
  507.   frameSize(elFrame, wnd) {
  508.     if (!elFrame) return;
  509.     const r = elFrame.getBoundingClientRect();
  510.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  511.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  512.     const x = r.left < 0 ? -r.left : 0;
  513.     const y = r.top < 0 ? -r.top : 0;
  514.     return [w, h, x, y];
  515.   },
  516.  
  517.   generateScales(fit) {
  518.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  519.     const zoomStep = cfg.zoomStep / 100;
  520.     const arr = [scale];
  521.     if (fit !== 1) {
  522.       const diff = goal / scale;
  523.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  524.       const step = steps && Math.pow(diff, 1 / steps);
  525.       for (let i = steps; --i > 0;)
  526.         arr.push((scale *= step));
  527.       arr.push(scale = goal);
  528.     }
  529.     while ((scale *= zoomStep) <= ZOOM_MAX)
  530.       arr.push(scale);
  531.     return arr;
  532.   },
  533.  
  534.   measurePopup() {
  535.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  536.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  537.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  538.     if (p.clientWidth > nw) {
  539.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  540.       nh = ai.nheight = w / nw * nh | 0;
  541.       nw = ai.nwidth = w;
  542.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  543.     }
  544.     p.classList.add(`${PREFIX}show`);
  545.     p.removeAttribute('style');
  546.     const s = getComputedStyle(p);
  547.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  548.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  549.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  550.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  551.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  552.     ai.extras = {
  553.       inw, inh,
  554.       outw, outh,
  555.       o: o2 / 2,
  556.       w: inw + outw,
  557.       h: inh + outh,
  558.     };
  559.     const fit = Math.min(
  560.       (ai.view.w - ai.extras.w) / ai.nwidth,
  561.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  562.     const isCustom = !cfg.fit && cfg.scales.length;
  563.     let cutoff = Math.min(1, fit);
  564.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  565.     if (isCustom) {
  566.       const dst = [];
  567.       for (const scale of cfg.scales) {
  568.         const val = parseFloat(scale) || fit;
  569.         dst.push(val);
  570.         if (isCustom && typeof scale === 'string') {
  571.           if (scale.includes('!')) cutoff = val;
  572.           if (scale.includes('*')) scaleZoom = val;
  573.         }
  574.       }
  575.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  576.     } else {
  577.       ai.scales = Calc.generateScales(fit);
  578.     }
  579.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  580.     ai.scaleFit = fit;
  581.     ai.scaleZoom = scaleZoom;
  582.   },
  583.  
  584.   rect() {
  585.     let {node, rule} = ai;
  586.     let n = rule.rect && node.closest(rule.rect);
  587.     if (n) return n.getBoundingClientRect();
  588.     const nested = node.getElementsByTagName('*');
  589.     let maxArea = 0;
  590.     let maxBounds;
  591.     n = node;
  592.     for (let i = 0; n; n = nested[i++]) {
  593.       const bounds = n.getBoundingClientRect();
  594.       const area = bounds.width * bounds.height;
  595.       if (area > maxArea) {
  596.         maxArea = area;
  597.         maxBounds = bounds;
  598.         node = n;
  599.       }
  600.     }
  601.     return maxBounds;
  602.   },
  603.  
  604.   scaleBiggerThan(scale, i, arr) {
  605.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  606.   },
  607.  
  608.   scaleIndex(dir) {
  609.     const i = ai.scales.indexOf(ai.scale);
  610.     if (i >= 0) return i + dir;
  611.     for (
  612.       let len = ai.scales.length,
  613.         i = dir > 0 ? 0 : len - 1;
  614.       i >= 0 && i < len;
  615.       i += dir
  616.     ) {
  617.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  618.         return i;
  619.     }
  620.     return -1;
  621.   },
  622.  
  623.   scaleForFirstZoom(keepScale) {
  624.     const z = ai.scaleZoom;
  625.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  626.   },
  627.  
  628.   updateViewSize() {
  629.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  630.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  631.     if (window === top) return;
  632.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  633.     if (w && h) {
  634.       ai.view = {w, h, x: 0, y: 0};
  635.     } else {
  636.       addEventListener('message', App.onMessageChild, true);
  637.       parent.postMessage(MSG.getViewSize, '*');
  638.     }
  639.   },
  640. };
  641.  
  642. class Config {
  643.  
  644.   constructor({data: c, save}) {
  645.     if (typeof c === 'string')
  646.       c = tryJSON(c);
  647.     if (typeof c !== 'object' || !c)
  648.       c = {};
  649.     const {DEFAULTS} = Config;
  650.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  651.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  652.         '';
  653.     if (c.version !== DEFAULTS.version) {
  654.       if (typeof c.hosts === 'string')
  655.         c.hosts = c.hosts.split('\n')
  656.           .map(s => tryJSON(s) || s)
  657.           .filter(Boolean);
  658.       if (c.close === true || c.close === false)
  659.         c.zoomOut = c.close ? 'auto' : 'stay';
  660.       for (const key in DEFAULTS)
  661.         if (typeof c[key] !== typeof DEFAULTS[key])
  662.           c[key] = DEFAULTS[key];
  663.       if (c.version === 3 && c.scales[0] === 0)
  664.         c.scales[0] = '0!';
  665.       for (const key in c)
  666.         if (!(key in DEFAULTS))
  667.           delete c[key];
  668.       c.version = DEFAULTS.version;
  669.       if (save)
  670.         GM.setValue('cfg', c);
  671.     }
  672.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  673.       App.globalStyle = '';
  674.     if (!isArray(c.scales))
  675.       c.scales = [];
  676.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  677.     Object.assign(this, DEFAULTS, c);
  678.   }
  679.  
  680.   static async load(opts) {
  681.     opts.data = await GM.getValue('cfg');
  682.     return new Config(opts);
  683.   }
  684.  
  685.   _getCss() {
  686.     const {css} = this;
  687.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  688.   }
  689. }
  690.  
  691. Config.DEFAULTS = /** @type mpiv.Config */ {
  692.   __proto__: null,
  693.   center: false,
  694.   css: '',
  695.   delay: 500,
  696.   fit: '',
  697.   globalStatus: false,
  698.   // prefer ' inside rules because " will be displayed as \"
  699.   // example: "img[src*='icon']"
  700.   hosts: [{
  701.     name: 'No popup for YouTube thumbnails',
  702.     d: 'www.youtube.com',
  703.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  704.     s: '',
  705.   }, {
  706.     name: 'No popup for SVG/PNG icons',
  707.     d: '',
  708.     e: "img[src*='icon']",
  709.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  710.     s: '',
  711.   }],
  712.   imgtab: false,
  713.   keepOnBlur: false,
  714.   keepVids: false,
  715.   mute: false,
  716.   night: false,
  717.   preload: false,
  718.   scale: 1.05,
  719.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  720.   start: 'auto',
  721.   startAlt: 'context',
  722.   startAltShown: false,
  723.   uiBackgroundColor: '#ffffff',
  724.   uiBackgroundOpacity: 100,
  725.   uiBorderColor: '#000000',
  726.   uiBorderOpacity: 100,
  727.   uiBorder: 0,
  728.   uiFadein: true,
  729.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  730.   uiInfo: true,
  731.   uiInfoCaption: true,
  732.   uiInfoHide: 3,
  733.   uiInfoOnce: true,
  734.   uiShadowColor: '#000000',
  735.   uiShadowOpacity: 80,
  736.   uiShadow: 20,
  737.   uiPadding: 0,
  738.   uiMargin: 0,
  739.   version: 6,
  740.   videoCtrl: true,
  741.   waitLoad: false,
  742.   xhr: true,
  743.   zoom: 'context',
  744.   zoomOut: 'auto',
  745.   zoomStep: 133,
  746. };
  747.  
  748. const CspSniffer = {
  749.  
  750.   /** @type {?Object<string,string[]>} */
  751.   csp: null,
  752.   selfUrl: location.origin + '/',
  753.  
  754.   // will be null when done
  755.   init() {
  756.     this.busy = new Promise(resolve => {
  757.       const xhr = new XMLHttpRequest();
  758.       xhr.open('get', location);
  759.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  760.       xhr.onreadystatechange = () => {
  761.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  762.           this.csp = this._parse([
  763.             xhr.getResponseHeader('content-security-policy'),
  764.             $prop('meta[http-equiv="Content-Security-Policy"]', 'content'),
  765.           ].filter(Boolean).join(','));
  766.           this.init = this.busy = xhr.onreadystatechange = null;
  767.           xhr.abort();
  768.           resolve();
  769.         }
  770.       };
  771.       xhr.send();
  772.     });
  773.   },
  774.  
  775.   async check(url, allowInit) {
  776.     if (allowInit && this.init) this.init();
  777.     if (this.busy) await this.busy;
  778.     const isVideo = Util.isVideoUrl(url);
  779.     let mode;
  780.     if (this.csp) {
  781.       const src = this.csp[isVideo ? 'media' : 'img'];
  782.       if (!src.some(this._srcMatches, url))
  783.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  784.     }
  785.     return [mode || ai.xhr, isVideo];
  786.   },
  787.  
  788.   _parse(csp) {
  789.     if (!csp) return;
  790.     const src = {};
  791.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  792.     for (let m; (m = rx.exec(csp));)
  793.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  794.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  795.       nonce = RegExp.$1;
  796.     if ((src.trusted || []).includes("'script'"))
  797.       App.NOP = () => {};
  798.     if (!src.img) src.img = src.default || [];
  799.     if (!src.media) src.media = src.default || [];
  800.     for (const set of [src.img, src.media]) {
  801.       set.forEach((item, i) => {
  802.         if (item !== '*' && item.includes('*')) {
  803.           set[i] = new RegExp(
  804.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  805.             item
  806.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  807.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  808.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  809.             .replace(/[^/]$/, '$&/'));
  810.         }
  811.       });
  812.     }
  813.     return src;
  814.   },
  815.  
  816.   /** @this string */
  817.   _srcMatches(src) {
  818.     return src instanceof RegExp ? src.test(this) :
  819.       src === '*' ||
  820.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  821.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  822.   },
  823. };
  824.  
  825. const Events = {
  826.  
  827.   ctrl: false,
  828.   hoverData: null,
  829.   hoverTimer: 0,
  830.   ignoreKeyHeld: false,
  831.  
  832.   onMouseOver(e) {
  833.     let node = e.target;
  834.     Events.ignoreKeyHeld = e.shiftKey;
  835.     if (!App.isEnabled ||
  836.         !App.canClose() ||
  837.         e.shiftKey ||
  838.         ai.zoomed ||
  839.         node === ai.popup ||
  840.         node === doc.body ||
  841.         node === doc.documentElement ||
  842.         node === elSetup ||
  843.         ai.gallery && ai.rectHovered)
  844.       return;
  845.     if (node.shadowRoot)
  846.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  847.     // we don't want to process everything in the path of a quickly moving mouse cursor
  848.     Events.hoverData = {e, node, start: now()};
  849.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  850.     node.addEventListener('mouseout', Events.onMouseOutThrottled);
  851.   },
  852.  
  853.   onMouseOverThrottled(force) {
  854.     const {start, e, node, nodeOut} = Events.hoverData || {};
  855.     if (!node || node === nodeOut && (Events.hoverData = null, 1))
  856.       return;
  857.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  858.     const wait = force ? 0 : start + SETTLE_TIME - now();
  859.     const t = Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  860.     if (t)
  861.       return;
  862.     Events.hoverData = null;
  863.     if (!Ruler.rules)
  864.       Ruler.init();
  865.     const info = RuleMatcher.adaptiveFind(node);
  866.     if (info && info.url && info.node !== ai.node)
  867.       App.activate(info, e);
  868.   },
  869.  
  870.   onMouseOut(e) {
  871.     if (!e.relatedTarget && !cfg.keepOnBlur && !e.shiftKey && App.canClose())
  872.       App.deactivate();
  873.   },
  874.  
  875.   onMouseOutThrottled(e) {
  876.     const d = Events.hoverData;
  877.     if (d) d.nodeOut = this;
  878.     this.removeEventListener('mouseout', Events.onMouseOutThrottled);
  879.     Events.hoverTimer = 0;
  880.   },
  881.  
  882.   onMouseOutShadow(e) {
  883.     const root = e.target.shadowRoot;
  884.     if (root) {
  885.       root.removeEventListener('mouseover', Events.onMouseOver);
  886.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  887.     }
  888.   },
  889.  
  890.   onMouseMove(e) {
  891.     Events.trackMouse(e);
  892.     if (e.shiftKey)
  893.       return;
  894.     if (!ai.zoomed && !ai.rectHovered && App.canClose()) {
  895.       App.deactivate();
  896.     } else if (ai.zoomed) {
  897.       Popup.move();
  898.       const {cx, cy, view: {w, h}} = ai;
  899.       const bx = w / 6;
  900.       const by = h / 6;
  901.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  902.       Status.set(`${onEdge ? '+' : '-'}edge`);
  903.     }
  904.   },
  905.  
  906.   onMouseDown({shiftKey, button, target}) {
  907.     if (!button && target === ai.popup && ai.popup.controls && (shiftKey || !App.canClose())) {
  908.       ai.controlled = ai.zoomed = true;
  909.     } else if (button === 2 || shiftKey) {
  910.       // Shift = ignore; RMB will be processed in onContext
  911.     } else {
  912.       App.deactivate({wait: true});
  913.       doc.addEventListener('mouseup', App.enable, {once: true});
  914.     }
  915.   },
  916.  
  917.   onMouseScroll(e) {
  918.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  919.     if (ai.zoomed) {
  920.       Events.zoomInOut(dir);
  921.     } else if (ai.gNum > 1 && ai.popup) {
  922.       Gallery.next(-dir);
  923.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  924.       App.toggleZoom();
  925.     } else if (App.canClose()) {
  926.       App.deactivate();
  927.       return;
  928.     }
  929.     dropEvent(e);
  930.   },
  931.  
  932.   onKeyDown(e) {
  933.     // Synthesized events may be of the wrong type and not have a `key`
  934.     const key = describeKey(e);
  935.     const p = ai.popup;
  936.     if (!p && key === '^Control') {
  937.       addEventListener('keyup', Events.onKeyUp, true);
  938.       Events.ctrl = true;
  939.     }
  940.     if (!p && key === '^ContextMenu')
  941.       return Events.onContext.call(this, e);
  942.     if (!p || e.repeat)
  943.       return;
  944.     switch (key) {
  945.       case '+Shift':
  946.         if (ai.shiftKeyTime)
  947.           return;
  948.         ai.shiftKeyTime = now();
  949.         Status.set('+shift');
  950.         if (cfg.uiInfo)
  951.           Bar.show(1);
  952.         if (isVideo(p))
  953.           p.controls = true;
  954.         return;
  955.       case 'KeyA':
  956.         p.toggleAttribute(NOAA_ATTR);
  957.         break;
  958.       case 'ArrowRight':
  959.       case 'KeyJ':
  960.         Gallery.next(1);
  961.         break;
  962.       case 'ArrowLeft':
  963.       case 'KeyK':
  964.         Gallery.next(-1);
  965.         break;
  966.       case 'KeyC':
  967.         Bar.setText(ai.bar.firstChild ? '' : ai.barText);
  968.         Bar.show(0);
  969.         break;
  970.       case 'KeyD':
  971.         Req.saveFile();
  972.         break;
  973.       case 'KeyF':
  974.         if (p !== document.fullscreenElement) p.requestFullscreen();
  975.         else document.exitFullscreen();
  976.         break;
  977.       case 'KeyH': // flip horizontally
  978.       case 'KeyV': // flip vertically
  979.       case 'KeyL': // rotate left
  980.       case 'KeyR': // rotate right
  981.         if (!p)
  982.           return;
  983.         if (key === 'KeyH' || key === 'KeyV') {
  984.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  985.           ai[side] = !ai[side];
  986.         } else {
  987.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  988.         }
  989.         Bar.updateDetails();
  990.         Popup.move();
  991.         break;
  992.       case 'KeyI':
  993.         (Util.elShown(ai.bar) ? Bar.hide : Bar.show)(2);
  994.         break;
  995.       case 'KeyM':
  996.         if (isVideo(p))
  997.           p.muted = !p.muted;
  998.         break;
  999.       case 'KeyN':
  1000.         ai.night = p.classList.toggle('mpiv-night');
  1001.         break;
  1002.       case 'KeyT':
  1003.         GM.openInTab(Util.tabFixUrl() || p.src);
  1004.         App.deactivate();
  1005.         break;
  1006.       case 'Minus':
  1007.       case 'NumpadSubtract':
  1008.         if (ai.zoomed) {
  1009.           Events.zoomInOut(-1);
  1010.         } else {
  1011.           App.toggleZoom();
  1012.         }
  1013.         break;
  1014.       case 'Equal':
  1015.       case 'NumpadAdd':
  1016.         if (ai.zoomed) {
  1017.           Events.zoomInOut(1);
  1018.         } else {
  1019.           App.toggleZoom();
  1020.         }
  1021.         break;
  1022.       case 'Escape':
  1023.         App.deactivate({wait: true});
  1024.         break;
  1025.       case '!Alt':
  1026.         return;
  1027.       default:
  1028.         App.deactivate({wait: true});
  1029.         return;
  1030.     }
  1031.     dropEvent(e);
  1032.   },
  1033.  
  1034.   onKeyUp(e) {
  1035.     const p = ai.popup || false;
  1036.     if (e.key === 'Control') {
  1037.       if (!p) removeEventListener('keyup', Events.onKeyUp, true);
  1038.       setTimeout(() => (Events.ctrl = false));
  1039.     }
  1040.     if (p && e.key === 'Shift' && ai.shiftKeyTime) {
  1041.       Status.set('-shift');
  1042.       if (cfg.uiInfo)
  1043.         Bar.hide(1);
  1044.       if (p.controls)
  1045.         p.controls = false;
  1046.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1047.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1048.         ai.controlled = false;
  1049.       else if (p && (ai.zoomed || ai.rectHovered !== false))
  1050.         App.toggleZoom();
  1051.       else
  1052.         App.deactivate({wait: true});
  1053.       ai.shiftKeyTime = 0;
  1054.     } else if (
  1055.       describeKey(e) === 'Control' && !p && !Events.ignoreKeyHeld &&
  1056.       (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)
  1057.     ) {
  1058.       dropEvent(e);
  1059.       if (Events.hoverData) {
  1060.         Events.hoverData.e = e;
  1061.         Events.onMouseOverThrottled(true);
  1062.       }
  1063.       if (ai.node) {
  1064.         ai.force = true;
  1065.         App.start();
  1066.       }
  1067.     }
  1068.   },
  1069.  
  1070.   onContext(e) {
  1071.     if (Events.ignoreKeyHeld)
  1072.       return;
  1073.     const p = ai.popup;
  1074.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1075.       dropEvent(e);
  1076.     } else if (!p && (!cfg.videoCtrl || !isVideo(ai.node) || Events.ctrl) && (
  1077.       cfg.start === 'context' ||
  1078.       cfg.start === 'contextMK' ||
  1079.       cfg.start === 'contextM' && (e.button === 2) ||
  1080.       cfg.start === 'contextK' && (e.button !== 2) ||
  1081.       (cfg.start === 'auto' && ai.rule.manual)
  1082.     )) {
  1083.       // right-clicked on an image while the context menu is shown for something else
  1084.       if (!ai.node && !Events.hoverData)
  1085.         Events.onMouseOver(e);
  1086.       Events.onMouseOverThrottled(true);
  1087.       if (ai.node) {
  1088.         ai.force = true;
  1089.         App.start();
  1090.         dropEvent(e);
  1091.       }
  1092.     } else if (p) {
  1093.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1094.     }
  1095.   },
  1096.  
  1097.   onVisibility(e) {
  1098.     Events.ctrl = false;
  1099.   },
  1100.  
  1101.   pierceShadow(node, x, y) {
  1102.     for (let root; (root = node.shadowRoot);) {
  1103.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1104.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1105.       const inner = root.elementFromPoint(x, y);
  1106.       if (!inner || inner === node)
  1107.         break;
  1108.       node = inner;
  1109.     }
  1110.     return node;
  1111.   },
  1112.  
  1113.   toggle(enable) {
  1114.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1115.     const passive = {passive: true, capture: true};
  1116.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1117.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1118.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1119.     window[onOff]('keyup', Events.onKeyUp, true);
  1120.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false, capture: true});
  1121.     ai.node.removeEventListener('mouseout', Events.onMouseOutThrottled);
  1122.   },
  1123.  
  1124.   trackMouse(e) {
  1125.     const cx = ai.cx = e.clientX;
  1126.     const cy = ai.cy = e.clientY;
  1127.     const r = ai.rect || (ai.rect = Calc.rect());
  1128.     ai.rectHovered =
  1129.       cx > r.left - 2 && cx < r.right + 2 &&
  1130.       cy > r.top - 2 && cy < r.bottom + 2;
  1131.   },
  1132.  
  1133.   zoomInOut(dir) {
  1134.     const i = Calc.scaleIndex(dir);
  1135.     const n = ai.scales.length;
  1136.     if (i >= 0 && i < n)
  1137.       ai.scale = ai.scales[i];
  1138.     const zo = cfg.zoomOut;
  1139.     if (i <= 0 && zo !== 'stay') {
  1140.       if (ai.scaleFit < ai.scale * .99) {
  1141.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1142.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1143.         App.deactivate({wait: true});
  1144.         return;
  1145.       }
  1146.       ai.zoomed = zo !== 'unzoom';
  1147.     } else {
  1148.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1149.     }
  1150.     if (ai.zooming)
  1151.       ai.popup.classList.add(`${PREFIX}zooming`);
  1152.     Popup.move();
  1153.     Bar.updateDetails();
  1154.   },
  1155. };
  1156.  
  1157. const Gallery = {
  1158.  
  1159.   makeParser(g) {
  1160.     return isFunction(g) ? g : Gallery.defaultParser;
  1161.   },
  1162.  
  1163.   findIndex(gUrl) {
  1164.     const sel = gUrl.split('#')[1];
  1165.     if (!sel)
  1166.       return 0;
  1167.     let i = +sel;
  1168.     if (i >= 0 && i === (i | 0))
  1169.       return i;
  1170.     for (i = 0; i < ai.gNum; i++) {
  1171.       const {url} = ai.gItems[i];
  1172.       if (isArray(url)
  1173.         ? url.indexOf(sel) || url.some(u => u.indexOf(sel, u.lastIndexOf('/')) > 0)
  1174.         : url === sel || url.indexOf(sel, url.lastIndexOf('/')) > 0
  1175.       ) return i;
  1176.     }
  1177.     return 0;
  1178.   },
  1179.  
  1180.   next(dir) {
  1181.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1182.     const item = ai.gItem = ai.gItems[ai.gIndex];
  1183.     if (isArray(item.url)) {
  1184.       ai.urls = item.url.slice(1);
  1185.       ai.url = item.url[0];
  1186.     } else {
  1187.       ai.urls = null;
  1188.       ai.url = item.url;
  1189.     }
  1190.     ai.gItemNext = ai.gItems[Gallery.nextIndex(dir || 1)];
  1191.     App.startSingle();
  1192.     Bar.updateName();
  1193.     if (dir) Bar.show(0);
  1194.   },
  1195.  
  1196.   nextIndex(dir) {
  1197.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1198.   },
  1199.  
  1200.   defaultParser(text, doc, docUrl, m, rule) {
  1201.     const {g} = rule;
  1202.     const gi = g.index;
  1203.     const qEntry = g.entry;
  1204.     const qCaption = ensureArray(g.caption);
  1205.     const qImage = g.image || 'img';
  1206.     const qTitle = g.title;
  1207.     const fix =
  1208.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1209.       (s => s.trim());
  1210.     const elems = [...$$(qEntry || qImage, doc)];
  1211.     const items = elems.map(processEntry).filter(Boolean);
  1212.     items.title = processTitle();
  1213.     items.index =
  1214.       RX_HAS_CODE.test(gi) ? Util.newFunction('items', 'node', gi)(items, ai.node) :
  1215.         typeof gi === 'string' ? Req.findImageUrl(tryCatch($, gi, doc), docUrl) :
  1216.           gi == null ? Math.max(0, elems.indexOf(ai.node)) :
  1217.             gi;
  1218.     return items;
  1219.  
  1220.     function processEntry(entry) {
  1221.       const item = {};
  1222.       try {
  1223.         const img = qEntry ? $(qImage, entry) : entry;
  1224.         item.url = fix(Req.findImageUrl(img, docUrl), true);
  1225.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1226.       } catch (e) {}
  1227.       return item.url && item;
  1228.     }
  1229.     function processCaption(sel) {
  1230.       const el = !sel ? this
  1231.         : $(sel, this) ||
  1232.           $orSelf(sel, this.previousElementSibling) ||
  1233.           $orSelf(sel, this.nextElementSibling);
  1234.       return el && fix(Ruler.runCHandler.default(el) || el.textContent);
  1235.     }
  1236.     function processTitle() {
  1237.       const el = $(qTitle, doc);
  1238.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1239.     }
  1240.     function $orSelf(selector, el) {
  1241.       if (el && !el.matches(qEntry))
  1242.         return el.matches(selector) ? el : $(selector, el);
  1243.     }
  1244.   },
  1245. };
  1246.  
  1247. const Menu = window === top && GM.registerMenuCommand && {
  1248.   curAltName: '',
  1249.   unreg: GM.unregisterMenuCommand,
  1250.   makeAltName: () => Menu.unreg
  1251.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1252.     : 'MPIV: toggle auto-start',
  1253.   register() {
  1254.     GM.registerMenuCommand('MPIV: configure', setup);
  1255.     Menu.registerAlt();
  1256.   },
  1257.   registerAlt() {
  1258.     if (cfg.startAltShown) {
  1259.       Menu.curAltName = Menu.makeAltName();
  1260.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1261.     }
  1262.   },
  1263.   reRegisterAlt() {
  1264.     const old = Menu.curAltName;
  1265.     if (old && Menu.unreg) Menu.unreg(old);
  1266.     if (!old || Menu.unreg) Menu.registerAlt();
  1267.   },
  1268.   onAltToggled() {
  1269.     const wasAuto = cfg.start === 'auto';
  1270.     if (wasAuto) {
  1271.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1272.     } else {
  1273.       cfg.startAlt = cfg.start;
  1274.       cfg.start = 'auto';
  1275.     }
  1276.     Menu.reRegisterAlt();
  1277.   },
  1278. };
  1279.  
  1280. const Popup = {
  1281.  
  1282.   async create(src, pageUrl, error) {
  1283.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1284.       (ai.popup.dataset.galleryFlip = '') === '';
  1285.     if (!ai.gItems)
  1286.       Popup.destroy();
  1287.     else if (ai.blobUrl)
  1288.       URL.revokeObjectURL(ai.blobUrl);
  1289.     ai.imageUrl = src;
  1290.     if (!src)
  1291.       return;
  1292.     const myAi = ai;
  1293.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1294.     if (ai !== myAi)
  1295.       return;
  1296.     if (!xhr && error) {
  1297.       App.handleError(error);
  1298.       return;
  1299.     }
  1300.     Object.assign(ai, {pageUrl, xhr});
  1301.     if (xhr)
  1302.       [src, isVideo] = await Req.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1303.     if (ai !== myAi || !src)
  1304.       return;
  1305.     const p = ai.popup || (ai.popup = isVideo ? await PopupVideo.create() : $new('img'));
  1306.     p.id = `${PREFIX}popup`;
  1307.     p.src = src;
  1308.     p.addEventListener('error', App.handleError);
  1309.     if ((ai.night = (ai.night != null ? ai.night : cfg.night)))
  1310.       p.classList.add('mpiv-night');
  1311.     if (ai.zooming)
  1312.       p.addEventListener('transitionend', Popup.onZoom);
  1313.     $dataset(p, 'galleryFlip', inGallery);
  1314.     p.toggleAttribute('loaded', inGallery);
  1315.     const poo = ai.popover || typeof p.showPopover === 'function' && $('[popover]:popover-open');
  1316.     ai.popover = poo && poo.getBoundingClientRect().width && ($css(poo, {opacity: 0}), poo) || null;
  1317.     if (p.parentElement !== doc.body)
  1318.       doc.body.insertBefore(p, ai.bar && ai.bar.parentElement === doc.body && ai.bar || null);
  1319.     await 0;
  1320.     if (ai.popup !== p || App.checkProgress({start: true}) === false)
  1321.       return;
  1322.     if (p.complete)
  1323.       Popup.onLoad.call(p);
  1324.     else if (!isVideo)
  1325.       p.addEventListener('load', Popup.onLoad, {once: true});
  1326.   },
  1327.  
  1328.   destroy() {
  1329.     const p = ai.popup;
  1330.     if (!p) return;
  1331.     p.removeEventListener('load', Popup.onLoad);
  1332.     p.removeEventListener('error', App.handleError);
  1333.     if (ai.popover) {
  1334.       ai.popover.style.removeProperty('opacity');
  1335.       ai.popover = null;
  1336.     }
  1337.     if (isFunction(p.pause))
  1338.       p.pause();
  1339.     if (ai.blobUrl)
  1340.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1341.     p.remove();
  1342.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1343.   },
  1344.  
  1345.   move() {
  1346.     let x, y;
  1347.     const {cx, cy, extras, view} = ai;
  1348.     const vw = view.w - extras.outw;
  1349.     const vh = view.h - extras.outh;
  1350.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1351.     const h0 = ai.scale * ai.nheight + extras.inh;
  1352.     const isSwapped = ai.rotate % 180;
  1353.     const w = isSwapped ? h0 : w0;
  1354.     const h = isSwapped ? w0 : h0;
  1355.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1356.       const r = ai.rect;
  1357.       const rx = (r.left + r.right) / 2;
  1358.       const ry = (r.top + r.bottom) / 2;
  1359.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1360.         if (h < vh - 60)
  1361.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1362.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1363.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1364.         if (w < vw - 60)
  1365.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1366.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1367.       }
  1368.     }
  1369.     if (x == null) {
  1370.       x = vw > w
  1371.         ? (vw - w) / 2 + view.x
  1372.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1373.     }
  1374.     if (y == null) {
  1375.       y = vh > h
  1376.         ? (vh - h) / 2 + view.y
  1377.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1378.     }
  1379.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1380.     x += extras.o - diff;
  1381.     y += extras.o + diff;
  1382.     $css(ai.popup, {
  1383.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1384.                  `rotate(${ai.rotate || 0}deg) ` +
  1385.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1386.       width: `${Math.round(w0)}px`,
  1387.       height: `${Math.round(h0)}px`,
  1388.     });
  1389.   },
  1390.  
  1391.   onLoad() {
  1392.     if (this === ai.popup) {
  1393.       this.setAttribute('loaded', '');
  1394.       ai.popupLoaded = true;
  1395.       Status.set('-loading');
  1396.       let i = ai.gItem;
  1397.       if (i) i.url = this.src;
  1398.       if ((i = ai.gItemNext))
  1399.         Popup.preload(this, i);
  1400.     }
  1401.   },
  1402.  
  1403.   onZoom() {
  1404.     this.classList.remove(`${PREFIX}zooming`);
  1405.   },
  1406.  
  1407.   async preload(p, item, u = item.url, el = $new('img')) {
  1408.     ai.gItemNext = null;
  1409.     if (!isArray(u)) {
  1410.       el.src = u;
  1411.       return;
  1412.     }
  1413.     for (const arr = u; p === ai.popup && item.url === arr && (u = arr[0]);) {
  1414.       const {type} = await new Promise(cb => {
  1415.         el.src = u;
  1416.         el.onload = el.onerror = cb;
  1417.       });
  1418.       if (arr[0] === u)
  1419.         arr.shift();
  1420.       if (type === 'load') {
  1421.         item.url = u;
  1422.         break;
  1423.       }
  1424.     }
  1425.   },
  1426. };
  1427.  
  1428. const PopupVideo = {
  1429.   async create() {
  1430.     ai.bufBar = false;
  1431.     ai.bufStart = now();
  1432.     return $new('video', {
  1433.       autoplay: true,
  1434.       controls: true,
  1435.       muted: cfg.mute || new AudioContext().state === 'suspended',
  1436.       loop: true,
  1437.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1438.       onprogress: PopupVideo.progress,
  1439.       oncanplaythrough: PopupVideo.progressDone,
  1440.       onvolumechange: PopupVideo.rememberVolume,
  1441.     });
  1442.   },
  1443.  
  1444.   progress() {
  1445.     const {duration} = this;
  1446.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1447.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1448.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1449.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1450.     }
  1451.   },
  1452.  
  1453.   progressDone() {
  1454.     this.onprogress = this.oncanplaythrough = null;
  1455.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1456.       Bar.set(false);
  1457.     Popup.onLoad.call(this);
  1458.   },
  1459.  
  1460.   rememberVolume() {
  1461.     GM.setValue('volume', this.volume);
  1462.   },
  1463. };
  1464.  
  1465. const Ruler = {
  1466. /*
  1467.  'u' works only with URLs so it's ignored if 'html' is true
  1468.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1469.    |foo = url or text must start with foo
  1470.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1471.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1472.  'r' is checked only if 'u' matches first
  1473. */
  1474.   init() {
  1475.     let dd = dotDomain.split('.').slice(-3).reverse();
  1476.     if (dd[2] && (dd[1] === 'com' || dd[1] === 'co' && (dd[1] += 'm'))) dd.shift();
  1477.     const errors = new Map();
  1478.     /** @type mpiv.HostRule[] */
  1479.     const rules = Ruler.rules = (cfg.hosts || []).map(Ruler.parse, errors).filter(Boolean);
  1480.     const hasGMAE = typeof GM_addElement === 'function';
  1481.     const canEval = nonce || (nonce = ($('script[nonce]') || {}).nonce || '') || hasGMAE;
  1482.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1483.     const evalRules = [];
  1484.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1485.     for (const [rule, err] of errors.entries()) {
  1486.       if (!RX_EVAL_BLOCKED.test(err)) {
  1487.         App.handleError('Invalid custom host rule:', rule);
  1488.         continue;
  1489.       }
  1490.       if (canEval) {
  1491.         evalCode.push(evalRules.length ? ',' : '',
  1492.           '[', rules.indexOf(rule), ',{',
  1493.           ...Object.keys(FN_ARGS)
  1494.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1495.             .filter(Boolean),
  1496.           '}]');
  1497.       }
  1498.       evalRules.push(rule);
  1499.     }
  1500.     if (evalRules.length) {
  1501.       let result, wnd;
  1502.       if (canEval) {
  1503.         const GMAE = hasGMAE
  1504.           ? GM_addElement // eslint-disable-line no-undef
  1505.           : (tag, {textContent: txt}) => document.head.appendChild(
  1506.             Object.assign(document.createElement(tag), {
  1507.               textContent: trustedScript ? trustedScript(txt) : txt,
  1508.               nonce,
  1509.             }));
  1510.         evalCode.push(']; document.currentScript.remove();');
  1511.         GMAE('script', {textContent: evalCode.join('')});
  1512.         result = (wnd = unsafeWindow)[evalId] ||
  1513.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1514.       }
  1515.       if (result) {
  1516.         for (const [index, fns] of result)
  1517.           Object.assign(rules[index], fns);
  1518.         delete wnd[evalId];
  1519.       } else {
  1520.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1521.       }
  1522.     }
  1523.  
  1524.     // optimization: a rule is created only when on domain
  1525.     switch (dd.join('.')) {
  1526.  
  1527.       case '4chan.org': rules.push({
  1528.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1529.         q: '.op .fileText a',
  1530.         css: '#post-preview{display:none}',
  1531.       }); break;
  1532.  
  1533.       case 'amazon.com': rules.push({
  1534.         r: /.+?images\/I\/.+?\./,
  1535.         s: m => {
  1536.           const uh = doc.getElementById('universal-hover');
  1537.           return uh ? '' : m[0] + 'jpg';
  1538.         },
  1539.         css: '#zoomWindow{display:none!important;}',
  1540.       }); break;
  1541.  
  1542.       case 'bing.com': rules.push({
  1543.         e: 'a[m*="murl"]',
  1544.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1545.         s: '$1',
  1546.         html: true,
  1547.       }); break;
  1548.  
  1549.       case 'deviantart.com': rules.push({
  1550.         e: 'a[href*="/art/"] img[src*="/v1/"]',
  1551.         r: /^(.+)\/v1\/\w+\/[^/]+\/(.+)-\d+.(\.\w+)(\?.+)/,
  1552.         s: ([, base, name, ext, tok], node) => {
  1553.           let v = Util.getReactChildren(node.closest('a'), 'props.deviation.media.types');
  1554.           return v && (v = v.find(t => t.t === 'fullview')) && `${base}${
  1555.             v.c ? v.c.replace('<prettyName>', name)
  1556.               : `/v1/fill/w_${v.w},h_${v.h}/${name}-fullview${ext}`}${tok}`;
  1557.         },
  1558.       }, {
  1559.         e: '.dev-view-deviation img',
  1560.         s: () => [
  1561.           $('.dev-page-download').href,
  1562.           $('.dev-content-full').src,
  1563.         ].filter(Boolean),
  1564.       }, {
  1565.         e: 'a[data-hook=deviation_link]',
  1566.         q: 'link[as=image]',
  1567.       }); break;
  1568.  
  1569.       case 'discord.com': rules.push({
  1570.         u: '||discordapp.net/external/',
  1571.         r: /\/https?\/(.+)/,
  1572.         s: '//$1',
  1573.         follow: true,
  1574.       }); break;
  1575.  
  1576.       case 'dropbox.com': rules.push({
  1577.         r: /(.+?&size_mode)=\d+(.*)/,
  1578.         s: '$1=5$2',
  1579.       }); break;
  1580.  
  1581.       case 'facebook.com': rules.push({
  1582.         e: 'a[href^="/photo/?"], a[href^="https://www.facebook.com/photo"]',
  1583.         s: (m, el) => (m = Util.getReactChildren(el.parentNode)) &&
  1584.           pick(m, (m[0] ? '0.props.linkProps' : 'props') + '.passthroughProps.origSrc'),
  1585.       }); break;
  1586.  
  1587.       case 'flickr.com': if (pick(unsafeWindow, 'YUI_config.flickr.api.site_key')) rules.push({
  1588.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1589.         s: m => `https://www.flickr.com/services/rest/?${
  1590.           new URLSearchParams({
  1591.             photo_id: m[1],
  1592.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1593.             method: 'flickr.photos.getSizes',
  1594.             format: 'json',
  1595.             nojsoncallback: 1,
  1596.           }).toString()}`,
  1597.         q: text => JSON.parse(text).sizes.size.pop().source,
  1598.         anonymous: true,
  1599.       }); break;
  1600.  
  1601.       case 'github.com': rules.push({
  1602.         r: new RegExp([
  1603.           /(avatars.+?&s=)\d+/,
  1604.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1605.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:avif|webp|png|jpe?g|bmp|gif|cur|ico|svg))$/,
  1606.         ].map(rx => rx.source).join('|')),
  1607.         s: m => `https://${
  1608.           m[1] ? `${m[1]}460` :
  1609.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1610.               $('.AppHeader-context-item > .octicon-lock')
  1611.                 ? `${m[4]}${m[5]}raw/${m[6]}`
  1612.                 : `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1613.         }`,
  1614.       }); break;
  1615.  
  1616.       case 'google.com': if (/[&?]tbm=isch(&|$)/.test(location.search)) rules.push({
  1617.         e: 'a[href*="imgres?imgurl="] img',
  1618.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1619.         follow: true,
  1620.       }, {
  1621.         e: '[data-tbnid] a:not([href])',
  1622.         s: (m, a) => {
  1623.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1624.           new MutationObserver((_, mo) => {
  1625.             mo.disconnect();
  1626.             App.isEnabled = true;
  1627.             a.alt = a2.innerText;
  1628.             const {left, top} = a.getBoundingClientRect();
  1629.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1630.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1631.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1632.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1633.         },
  1634.       }); break;
  1635.  
  1636.       case 'instagram.com': rules.push({
  1637.         e: 'a[href*="/p/"],' +
  1638.           'article [role="button"][tabindex="0"],' +
  1639.           'article [role="button"][tabindex="0"] div',
  1640.         s: (m, node, rule) => {
  1641.           let data, a, n, img, src;
  1642.           if (location.pathname.startsWith('/p/') || location.pathname.startsWith('/tv/')) {
  1643.             img = $('img[srcset], video', node.parentNode);
  1644.             if (img && (isVideo(img) || parseFloat(img.sizes) > 900))
  1645.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1646.           }
  1647.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1648.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1649.           }
  1650.           const numPics = a && pick(data, 'edge_sidecar_to_children.edges.length') ||
  1651.             a && pick(data, 'carousel_media_count');
  1652.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1653.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1654.           rule.follow = !data && !rule.g;
  1655.           rule._data = data;
  1656.           rule._img = img;
  1657.           return (
  1658.             !a && !src ? false :
  1659.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1&__d=dis' : ''}` :
  1660.                 data.video_url || data.display_url);
  1661.         },
  1662.         c: (html, doc, node, rule) =>
  1663.           rule._getCaption(rule._data) || (rule._img || 0).alt || '',
  1664.         follow: true,
  1665.         _q: 'meta[property="og:video"]',
  1666.         _g(text, doc, url, m, rule) {
  1667.           const json = tryJSON(text);
  1668.           const media =
  1669.             pick(json, 'graphql.shortcode_media') ||
  1670.             pick(json, 'items.0');
  1671.           const items =
  1672.             pick(media, 'edge_sidecar_to_children.edges', res => res.map(e => ({
  1673.               url: e.node.video_url || e.node.display_url,
  1674.             }))) ||
  1675.             pick(media, 'carousel_media', res => res.map(e => ({
  1676.               url: pick(e, 'video_versions.0.url') || pick(e, 'image_versions2.candidates.0.url'),
  1677.             })));
  1678.           items.title = rule._getCaption(media) || '';
  1679.           return items;
  1680.         },
  1681.         _getCaption: data => pick(data, 'caption.text') ||
  1682.           pick(data, 'edge_media_to_caption.edges.0.node.text'),
  1683.       }); break;
  1684.  
  1685.       case 'reddit.com': rules.push({
  1686.         u: '||i.reddituploads.com/',
  1687.       }, {
  1688.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1689.         s: (m, node) => $propUp(node, 'data-url'),
  1690.       }, {
  1691.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1692.         s: 'https://i$1',
  1693.       }); break;
  1694.  
  1695.       case 'stackoverflow.com': rules.push({
  1696.         e: '.post-tag, .post-tag img',
  1697.         s: '',
  1698.       }); break;
  1699.  
  1700.       case 'startpage.com': rules.push({
  1701.         r: /[&?]piurl=([^&]+)/,
  1702.         s: '$1',
  1703.         follow: true,
  1704.       }); break;
  1705.  
  1706.       case 'tumblr.com': rules.push({
  1707.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1708.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1709.         follow: true,
  1710.       }); break;
  1711.  
  1712.       case 'twitter.com': rules.push({
  1713.         e: '.grid-tweet > .media-overlay',
  1714.         s: (m, node) => node.previousElementSibling.src,
  1715.         follow: true,
  1716.       }); break;
  1717.     }
  1718.  
  1719.     rules.push(
  1720.       {
  1721.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1722.         s: '$1',
  1723.         follow: true,
  1724.         onerror: 'skip',
  1725.       },
  1726.       {
  1727.         u: [
  1728.           '||500px.com/photo/',
  1729.           '||cl.ly/',
  1730.           '||cweb-pix.com/',
  1731.           '//ibb.co/',
  1732.           '||imgcredit.xyz/image/',
  1733.         ],
  1734.         r: /\.\w+\/.+/,
  1735.         q: 'meta[property="og:image"]',
  1736.       },
  1737.       {
  1738.         u: 'attachment.php',
  1739.         r: /attachment\.php.+attachmentid/,
  1740.       },
  1741.       {
  1742.         u: '||abload.de/image',
  1743.         q: '#image',
  1744.       },
  1745.       {
  1746.         u: '||deviantart.com/art/',
  1747.         s: (m, node) =>
  1748.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1749.             '' :
  1750.             m.input,
  1751.         q: [
  1752.           '#download-button[href*=".jpg"]',
  1753.           '#download-button[href*=".jpeg"]',
  1754.           '#download-button[href*=".gif"]',
  1755.           '#download-button[href*=".png"]',
  1756.           '#gmi-ResViewSizer_fullimg',
  1757.           'img.dev-content-full',
  1758.         ],
  1759.       },
  1760.       {
  1761.         u: '||dropbox.com/s',
  1762.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1763.         q: (text, doc) =>
  1764.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1765.       },
  1766.       {
  1767.         r: /[./]ebay\.[^/]+\/itm\//,
  1768.         q: text =>
  1769.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1770.             .replace(/~~60_\d+/, '~~60_57'),
  1771.       },
  1772.       {
  1773.         u: '||i.ebayimg.com/',
  1774.         s: (m, node) =>
  1775.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1776.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1777.       },
  1778.       {
  1779.         u: '||fastpic.',
  1780.         s: (m, node) => {
  1781.           const a = node.closest('a');
  1782.           const url = decodeURIComponent(Req.findImageUrl(a || node))
  1783.             .replace(/\/i(\d+)\.(\w+\.\w+\/)\w+/, '/$2$1')
  1784.             .replace(/^\w+:\/\/fastpic[^/]+((?:\/\d+){3})\/\w+(\/\w+\.\w+).*/,
  1785.               'https://fastpic.org/view$1$2.html');
  1786.           return a || url.includes('.png') ? url : [url, url.replace(/\.jpe?g/, '.png')];
  1787.         },
  1788.         q: 'img[src*="/big/"]',
  1789.       },
  1790.       {
  1791.         u: '||flickr.com/photos/',
  1792.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1793.         s: m =>
  1794.           m.input.indexOf('/sizes/') < 0 ?
  1795.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1796.             false,
  1797.         q: (text, doc) => {
  1798.           const links = $$('.sizes-list a', doc);
  1799.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1800.         },
  1801.         follow: true,
  1802.       },
  1803.       {
  1804.         u: '||flickr.com/photos/',
  1805.         r: /\/sizes\//,
  1806.         q: '#allsizes-photo > img',
  1807.       },
  1808.       {
  1809.         u: '||gfycat.com/',
  1810.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1811.         s: 'https://$1$3',
  1812.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1813.       },
  1814.       {
  1815.         u: [
  1816.           '||googleusercontent.com/proxy',
  1817.           '||googleusercontent.com/gadgets/proxy',
  1818.         ],
  1819.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1820.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1821.       },
  1822.       {
  1823.         u: [
  1824.           '||googleusercontent.com/',
  1825.           '||ggpht.com/',
  1826.         ],
  1827.         s: m => m.input.includes('webcache.') ? '' :
  1828.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1829.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1830.       },
  1831.       {
  1832.         u: '||gravatar.com/',
  1833.         r: /([a-z0-9]{32})/,
  1834.         s: 'https://gravatar.com/avatar/$1?s=200',
  1835.       },
  1836.       {
  1837.         u: '//gyazo.com/',
  1838.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1839.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1840.         _q: 'link[rel="image_src"]',
  1841.       },
  1842.       {
  1843.         u: '||hostingkartinok.com/show-image.php',
  1844.         q: '.image img',
  1845.       },
  1846.       {
  1847.         u: [
  1848.           '||imagecurl.com/images/',
  1849.           '||imagecurl.com/viewer.php',
  1850.         ],
  1851.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1852.         s: 'https://imagecurl.com/images/$1$2$3',
  1853.       },
  1854.       {
  1855.         u: '||imagebam.com/',
  1856.         r: /^(https:\/\/)thumbs\d+(\.imagebam\.com\/).*?([^/]+)_t\./,
  1857.         s: '$1www$2view/$3',
  1858.         q: 'img.main-image',
  1859.       },
  1860.       {
  1861.         u: '||www.imagebam.com/view/',
  1862.         q: 'img.main-image',
  1863.       },
  1864.       {
  1865.         u: '||imageban.ru/thumbs',
  1866.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1867.         s: '$1out$2/$3/$4',
  1868.       },
  1869.       {
  1870.         u: [
  1871.           '||imageban.ru/show',
  1872.           '||imageban.net/show',
  1873.           '||ibn.im/',
  1874.         ],
  1875.         q: '#img_main',
  1876.       },
  1877.       {
  1878.         u: '||imageshack.us/img',
  1879.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1880.         s: 'https://$2/download/$1/$3$4',
  1881.       },
  1882.       {
  1883.         u: '||imageshack.us/i/',
  1884.         q: '#share-dl',
  1885.       },
  1886.       {
  1887.         u: '||imageteam.org/img',
  1888.         q: 'img[alt="image"]',
  1889.       },
  1890.       {
  1891.         u: [
  1892.           '||imagetwist.com/',
  1893.           '||imageshimage.com/',
  1894.         ],
  1895.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1896.         q: 'img.pic',
  1897.         xhr: true,
  1898.       },
  1899.       {
  1900.         u: '||imageupper.com/i/',
  1901.         q: '#img',
  1902.         xhr: true,
  1903.       },
  1904.       {
  1905.         u: '||imagevenue.com/',
  1906.         q: 'a[data-toggle="full"] img',
  1907.       },
  1908.       {
  1909.         u: '||imagezilla.net/show/',
  1910.         q: '#photo',
  1911.         xhr: true,
  1912.       },
  1913.       {
  1914.         u: [
  1915.           '||images-na.ssl-images-amazon.com/images/',
  1916.           '||media-imdb.com/images/',
  1917.         ],
  1918.         r: /images\/.+?\.jpg/,
  1919.         s: '/V1\\.?_.+?\\.//g',
  1920.       },
  1921.       {
  1922.         u: '||imgbox.com/',
  1923.         r: /\.com\/([a-z0-9]+)$/i,
  1924.         q: '#img',
  1925.         xhr: hostname !== 'imgbox.com',
  1926.       },
  1927.       {
  1928.         u: '||imgclick.net/',
  1929.         r: /\.net\/(\w+)/,
  1930.         q: 'img.pic',
  1931.         xhr: true,
  1932.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1933.       },
  1934.       {
  1935.         u: '.imgcredit.xyz/',
  1936.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1937.         s: ['https$1$2', 'https$1.png'],
  1938.       },
  1939.       {
  1940.         u: [
  1941.           '||imgflip.com/i/',
  1942.           '||imgflip.com/gif/',
  1943.         ],
  1944.         r: /\/(i|gif)\/([^/?#]+)/,
  1945.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1946.       },
  1947.       {
  1948.         u: [
  1949.           '||imgur.com/a/',
  1950.           '||imgur.com/gallery/',
  1951.         ],
  1952.         s: 'gallery', // suppressing an unused network request for remote `document`
  1953.         async g() {
  1954.           let u = `https://imgur.com/ajaxalbums/getimages/${ai.url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1955.           let info = tryJSON((await Req.gmXhr(u)).responseText) || 0;
  1956.           let images = (info.data || 0).images || [];
  1957.           if (!images[0]) {
  1958.             info = (await Req.gmXhr(ai.url)).responseText.match(/postDataJSON=(".*?")<|$/)[1];
  1959.             info = tryJSON(tryJSON(info)) || 0;
  1960.             images = info.media;
  1961.           }
  1962.           const items = [];
  1963.           for (const img of images) {
  1964.             const meta = img.metadata || img;
  1965.             items.push({
  1966.               url: img.url ||
  1967.                 (u = `https://i.imgur.com/${img.hash}`) && (
  1968.                   img.ext === '.gif' && img.animated !== false ?
  1969.                     [`${u}.webm`, `${u}.mp4`, u] :
  1970.                     u + img.ext
  1971.                 ),
  1972.               desc: [meta.title, meta.description].filter(Boolean).join(' - '),
  1973.             });
  1974.           }
  1975.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1976.             items.title = info.title;
  1977.           return items;
  1978.         },
  1979.       },
  1980.       {
  1981.         u: '||imgur.com/',
  1982.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1983.         s: 'gallery',
  1984.         g: (text, doc, url, m) =>
  1985.           m[2].split(',').map(id => ({
  1986.             url: `https://i.${m[1]}${id}.jpg`,
  1987.           })),
  1988.       },
  1989.       {
  1990.         u: '||imgur.com/',
  1991.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1992.         s: (m, node) => {
  1993.           if (/memegen|random|register|search|signin/.test(m.input))
  1994.             return '';
  1995.           const a = node.closest('a');
  1996.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1997.             return false;
  1998.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1999.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  2000.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  2001.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  2002.           return ext === 'webm' ?
  2003.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  2004.             u + ext;
  2005.         },
  2006.       },
  2007.       {
  2008.         u: [
  2009.           '||instagr.am/p/',
  2010.           '||instagram.com/p/',
  2011.           '||instagram.com/tv/',
  2012.         ],
  2013.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') +
  2014.         '/?__a=1&__d=dis',
  2015.         q: m => (m = tryJSON(m)) && (
  2016.           m = pick(m, 'graphql.shortcode_media') || pick(m, 'items.0') || 0
  2017.         ) && (
  2018.           m.video_url ||
  2019.           m.display_url ||
  2020.           pick(m, 'video_versions.0.url') ||
  2021.           pick(m, 'carousel_media.0.image_versions2.candidates.0.url') ||
  2022.           pick(m, 'image_versions2.candidates.0.url')
  2023.         ),
  2024.         rect: 'div.PhotoGridMediaItem',
  2025.         c: m => (m = tryJSON(m)) && (
  2026.           pick(m, 'items.0.caption.text') ||
  2027.           pick(m, 'graphql.shortcode_media.edge_media_to_caption.edges.0.node.text') ||
  2028.           ''
  2029.         ),
  2030.       },
  2031.       {
  2032.         u: [
  2033.           '||livememe.com/',
  2034.           '||lvme.me/',
  2035.         ],
  2036.         r: /\.\w+\/([^.]+)$/,
  2037.         s: 'http://i.lvme.me/$1.jpg',
  2038.       },
  2039.       {
  2040.         u: '||lostpic.net/image',
  2041.         q: '.image-viewer-image img',
  2042.       },
  2043.       {
  2044.         u: '||makeameme.org/meme/',
  2045.         r: /\/meme\/([^/?#]+)/,
  2046.         s: 'https://media.makeameme.org/created/$1.jpg',
  2047.       },
  2048.       {
  2049.         u: '||photobucket.com/',
  2050.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  2051.         s: 'https://i$1$3',
  2052.         xhr: !dotDomain.endsWith('.photobucket.com'),
  2053.       },
  2054.       {
  2055.         u: '||piccy.info/view3/',
  2056.         r: /(.+?\/view3)\/(.*)\//,
  2057.         s: '$1/$2/orig/',
  2058.         q: '#mainim',
  2059.       },
  2060.       {
  2061.         u: '||pimpandhost.com/image/',
  2062.         r: /(.+?\/image\/[0-9]+)/,
  2063.         s: '$1?size=original',
  2064.         q: 'img.original',
  2065.       },
  2066.       {
  2067.         u: [
  2068.           '||pixroute.com/',
  2069.           '||imgspice.com/',
  2070.         ],
  2071.         r: /\.html$/,
  2072.         q: 'img[id]',
  2073.         xhr: true,
  2074.       },
  2075.       {
  2076.         u: '||postima',
  2077.         r: /postima?ge?\.org\/image\/\w+/,
  2078.         q: [
  2079.           'a[href*="dl="]',
  2080.           '#main-image',
  2081.         ],
  2082.       },
  2083.       {
  2084.         u: [
  2085.           '||prntscr.com/',
  2086.           '||prnt.sc/',
  2087.         ],
  2088.         r: /\.\w+\/.+/,
  2089.         q: 'meta[property="og:image"]',
  2090.         xhr: true,
  2091.       },
  2092.       {
  2093.         u: '||radikal.ru/',
  2094.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2095.         s: (m, node, rule) =>
  2096.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2097.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2098.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2099.       },
  2100.       {
  2101.         u: '||tumblr.com',
  2102.         r: /_500\.jpg/,
  2103.         s: ['/_500/_1280/', ''],
  2104.       },
  2105.       {
  2106.         u: '||twimg.com/media/',
  2107.         r: /.+?format=(jpe?g|png|gif)/i,
  2108.         s: '$0&name=orig',
  2109.       },
  2110.       {
  2111.         u: '||twimg.com/media/',
  2112.         r: /.+?\.(jpe?g|png|gif)/i,
  2113.         s: '$0:orig',
  2114.       },
  2115.       {
  2116.         u: '||twimg.com/1/proxy',
  2117.         r: /t=([^&_]+)/i,
  2118.         s: m => atob(m[1]).match(/http.+/),
  2119.       },
  2120.       {
  2121.         u: '||twimg.com/',
  2122.         r: /\/profile_images/i,
  2123.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2124.       },
  2125.       {
  2126.         u: '||pic.twitter.com/',
  2127.         r: /\.com\/[a-z0-9]+/i,
  2128.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2129.         follow: true,
  2130.       },
  2131.       {
  2132.         u: '||twitpic.com/',
  2133.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2134.         s: 'https://twitpic.com/show/large/$2',
  2135.       },
  2136.       {
  2137.         u: '||wiki',
  2138.         r: /\/(?:thumb|images)\/.+\.(?:jpe?g|gif|png|svg)/i,
  2139.         s: m => m.input.replace(/\/(thumb(?=\/)|\d+px[^/]+(?=$|\?))/g, '')
  2140.           .replace(/\/(scale-to-width(-[a-z]+)?\/\d+|(zoom-crop|smart)(\/(width|height)\/\d+)+)/g, '/'),
  2141.         xhr: !hostname.includes('wiki'),
  2142.       },
  2143.       {
  2144.         u: '||ytimg.com/vi/',
  2145.         r: /(.+?\/vi\/[^/]+)/,
  2146.         s: '$1/0.jpg',
  2147.         rect: '.video-list-item',
  2148.       },
  2149.       {
  2150.         u: '/viewer.php?file=',
  2151.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2152.         s: '$1/images/$2',
  2153.         xhr: true,
  2154.       },
  2155.       {
  2156.         u: '/thumb_',
  2157.         r: /\/albums.+\/thumb_[^/]/,
  2158.         s: '/thumb_//',
  2159.       },
  2160.       {
  2161.         u: [
  2162.           '.th.jp',
  2163.           '.th.gif',
  2164.           '.th.png',
  2165.         ],
  2166.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2167.         s: '$1$2',
  2168.         follow: true,
  2169.       },
  2170.       {
  2171.         r: RX_MEDIA_URL,
  2172.       }
  2173.     );
  2174.   },
  2175.  
  2176.   format(rule, {expand} = {}) {
  2177.     const s = Util.stringify(rule, null, ' ');
  2178.     return expand ?
  2179.       /* {"a": ...,
  2180.           "b": ...,
  2181.           "c": ...
  2182.          } */
  2183.       s.replace(/^{\s+/g, '{') :
  2184.       /* {"a": ..., "b": ..., "c": ...} */
  2185.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2186.   },
  2187.  
  2188.   fromElement(el) {
  2189.     const text = el.textContent.trim();
  2190.     if (text.startsWith('{') &&
  2191.         text.endsWith('}') &&
  2192.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2193.       const rule = tryJSON(text);
  2194.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2195.     }
  2196.   },
  2197.  
  2198.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2199.  
  2200.   /** @returns mpiv.HostRule | Error | false | undefined */
  2201.   parse(rule) {
  2202.     const isBatchOp = this instanceof Map;
  2203.     try {
  2204.       if (typeof rule === 'string')
  2205.         rule = JSON.parse(rule);
  2206.       if ('d' in rule && typeof rule.d !== 'string')
  2207.         rule.d = undefined;
  2208.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2209.         return false;
  2210.       let {e} = rule;
  2211.       if (e != null) {
  2212.         e = typeof e === 'string' ? e.trim()
  2213.           : isArray(e) ? e.join(',').trim()
  2214.             : Object.entries(e).every(Ruler.isValidE2) && e;
  2215.         if (!e)
  2216.           throw new Error('Invalid syntax for "e". Examples: ' +
  2217.             '"e": ".image" or ' +
  2218.             '"e": [".image1", ".image2"] or ' +
  2219.             '"e": {".parent": ".image"} or ' +
  2220.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2221.         if (isBatchOp) rule.e = e || undefined;
  2222.       }
  2223.       let compileTo = isBatchOp ? rule : {};
  2224.       if (rule.r)
  2225.         compileTo.r = new RegExp(rule.r, 'i');
  2226.       if (App.NOP)
  2227.         compileTo = {};
  2228.       for (const key of Object.keys(FN_ARGS)) {
  2229.         if (RX_HAS_CODE.test(rule[key])) {
  2230.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2231.           if (fn !== App.NOP || !isBatchOp) {
  2232.             compileTo[key] = fn;
  2233.           } else if (isBatchOp) {
  2234.             this.set(rule, 'unsafe-eval');
  2235.           }
  2236.         }
  2237.       }
  2238.       return rule;
  2239.     } catch (err) {
  2240.       if (isBatchOp) {
  2241.         this.set(rule, err);
  2242.         return rule;
  2243.       } else {
  2244.         return err;
  2245.       }
  2246.     }
  2247.   },
  2248.  
  2249.   runC(text, doc = document) {
  2250.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2251.     ai.caption = fn(text, doc);
  2252.   },
  2253.  
  2254.   runCHandler: {
  2255.     function: (text, doc) =>
  2256.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2257.     string: (text, doc) => {
  2258.       const el = $many(ai.rule.c, doc);
  2259.       return !el ? '' :
  2260.         el.getAttribute('content') ||
  2261.         el.getAttribute('title') ||
  2262.         el.textContent;
  2263.     },
  2264.     default: (text, doc, el = ai.node) =>
  2265.       (ai.tooltip || 0).text ||
  2266.       el.alt ||
  2267.       $propUp(el, 'title') ||
  2268.       Req.getFileName(
  2269.         el.tagName === (ai.popup || 0).tagName
  2270.           ? ai.url
  2271.           : el.src || $propUp(el, 'href')),
  2272.   },
  2273.  
  2274.   runQ(text, doc, docUrl) {
  2275.     let url;
  2276.     if (isFunction(ai.rule.q)) {
  2277.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2278.       if (isArray(url)) {
  2279.         ai.urls = url.slice(1);
  2280.         url = url[0];
  2281.       }
  2282.     } else {
  2283.       const el = $many(ai.rule.q, doc);
  2284.       url = Req.findImageUrl(el, docUrl);
  2285.     }
  2286.     return url;
  2287.   },
  2288.  
  2289.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2290.   runE(rule, e, node) {
  2291.     let p, img, res, info;
  2292.     for (const selParent in e) {
  2293.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2294.         if (img === node)
  2295.           res = true;
  2296.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2297.           return info;
  2298.       }
  2299.     }
  2300.     return res;
  2301.   },
  2302.  
  2303.   /** @returns {?Array} if falsy then the rule should be skipped */
  2304.   runS(node, rule, m) {
  2305.     let urls = [], u;
  2306.     for (const s of ensureArray(rule.s))
  2307.       urls.push(
  2308.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2309.           isFunction(s) ? s(m, node, rule) :
  2310.             s);
  2311.     if (rule.q && urls.length > 1) {
  2312.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2313.       return;
  2314.     }
  2315.     if (isArray(u = urls[0]))
  2316.       u = [urls = u][0];
  2317.     return u === '' /* "stop all rules" */ ? urls
  2318.       : u && arrayFrom(new Set(urls), Util.decodeUrl);
  2319.   },
  2320.  
  2321.   /** @returns {boolean} */
  2322.   runU(rule, url) {
  2323.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2324.     return u.fn.call(u.data, url);
  2325.   },
  2326.  
  2327.   substituteSingle(s, m) {
  2328.     if (!m || m.input == null) return s;
  2329.     if (s.startsWith('/') && !s.startsWith('//')) {
  2330.       const mid = s.search(/[^\\]\//) + 1;
  2331.       const end = s.lastIndexOf('/');
  2332.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2333.       return m.input.replace(re, s.slice(mid + 1, end));
  2334.     }
  2335.     if (m.length && s.includes('$')) {
  2336.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2337.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2338.         for (let i = maxLength; i >= 0; i--) {
  2339.           const part = num.slice(0, i) | 0;
  2340.           if (part < m.length)
  2341.             return (m[part] || '') + num.slice(i);
  2342.         }
  2343.         return text;
  2344.       });
  2345.     }
  2346.     return s;
  2347.   },
  2348.  
  2349.   toggle(rule, prop, condition) {
  2350.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2351.     return condition;
  2352.   },
  2353. };
  2354.  
  2355. const RuleMatcher = {
  2356.  
  2357.   /** @returns {Object} */
  2358.   adaptiveFind(node, opts) {
  2359.     const tn = node.tagName;
  2360.     const src = node.currentSrc || node.src || '';
  2361.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2362.     let a, info, url;
  2363.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2364.     if (tn !== 'A') {
  2365.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2366.       info = RuleMatcher.find(url, node, opts);
  2367.     }
  2368.     if (!info && (a = node.closest('A'))) {
  2369.       const ds = a.dataset;
  2370.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2371.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2372.       url = !url.startsWith('data:') && url;
  2373.       info = RuleMatcher.find(url, a, opts);
  2374.     }
  2375.     if (!info && isPic)
  2376.       info = {node, rule: {}, url: src};
  2377.     return info;
  2378.   },
  2379.  
  2380.   /** @returns ?mpiv.RuleMatchInfo */
  2381.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2382.     let tn, isPic, html, h;
  2383.     for (const rule of rules || Ruler.rules) {
  2384.       let e, m;
  2385.       if (skipRules && skipRules.includes(rule) ||
  2386.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2387.           !rules && (e = rule.e) &&
  2388.             !(m = typeof e === 'string' ? node.matches(e) : Ruler.runE(rule, e, node)))
  2389.         continue;
  2390.       if (m && m.url)
  2391.         return m;
  2392.       const {r, s} = rule;
  2393.       let hasS = s != null;
  2394.       h = !noHtml && (r || hasS) && rule.html && (html || (html = node.outerHTML));
  2395.       if (r) {
  2396.         m = h ? r.exec(h) : url && r.exec(url);
  2397.       } else {
  2398.         m = ['']; m[0] = m.input = h || url || ''; m.index = 0;
  2399.       }
  2400.       if (!m)
  2401.         continue;
  2402.       if (s === '')
  2403.         return {};
  2404.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2405.       // but we'll only allow it to match rules without 's' in the nested find call
  2406.       if (!hasS && !skipRules && (tn ? isPic : isPic = (tn = node.tagName) === 'IMG' || tn === 'VIDEO'))
  2407.         continue;
  2408.       hasS &= s !== 'gallery';
  2409.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2410.       if (urls)
  2411.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2412.     }
  2413.   },
  2414.  
  2415.   /** @returns ?mpiv.RuleMatchInfo */
  2416.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2417.     let info;
  2418.     let url = `${urls[0]}`;
  2419.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2420.     if (url)
  2421.       url = Util.rel2abs(url);
  2422.     else
  2423.       info = {};
  2424.     if (follow)
  2425.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2426.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2427.       const xhr = cfg.xhr && rule.xhr;
  2428.       info = {
  2429.         match,
  2430.         node,
  2431.         rule,
  2432.         url,
  2433.         urls: urls.length > 1 ? urls.slice(1) : null,
  2434.         gallery: rule.g && Gallery.makeParser(rule.g),
  2435.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2436.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2437.       };
  2438.     }
  2439.     return info;
  2440.   },
  2441.  
  2442.   isFollowableUrl(url, rule) {
  2443.     const f = rule.follow;
  2444.     return isFunction(f) ? f(url) : f;
  2445.   },
  2446. };
  2447.  
  2448. const Req = {
  2449.  
  2450.   gmXhr(url, opts = {}) {
  2451.     if (ai.req)
  2452.       tryCatch(ai.req.abort);
  2453.     return new Promise((resolve, reject) => {
  2454.       const {anonymous} = ai.rule || {};
  2455.       ai.req = GM.xmlHttpRequest(Object.assign({
  2456.         url,
  2457.         anonymous,
  2458.         withCredentials: !anonymous,
  2459.         method: 'GET',
  2460.         timeout: 30e3,
  2461.       }, opts, {
  2462.         onload: done,
  2463.         onerror: done,
  2464.         ontimeout() {
  2465.           ai.req = null;
  2466.           reject(`Timeout fetching ${url}`);
  2467.         },
  2468.       }));
  2469.       function done(r) {
  2470.         ai.req = null;
  2471.         if (r.status < 400 && !r.error)
  2472.           resolve(r);
  2473.         else
  2474.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2475.       }
  2476.     });
  2477.   },
  2478.  
  2479.   async getDoc(url) {
  2480.     if (!url) {
  2481.       // current document
  2482.       return {
  2483.         doc,
  2484.         finalUrl: location.href,
  2485.         responseText: doc.documentElement.outerHTML,
  2486.       };
  2487.     }
  2488.     const r = await (!ai.post ?
  2489.       Req.gmXhr(url) :
  2490.       Req.gmXhr(url, {
  2491.         method: 'POST',
  2492.         data: ai.post,
  2493.         headers: {
  2494.           'Content-Type': 'application/x-www-form-urlencoded',
  2495.           'Referer': url,
  2496.         },
  2497.       }));
  2498.     r.doc = $parseHtml(r.responseText);
  2499.     return r;
  2500.   },
  2501.  
  2502.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2503.     ai.bufBar = false;
  2504.     ai.bufStart = now();
  2505.     const response = await Req.gmXhr(url, {
  2506.       responseType: 'blob',
  2507.       headers: {
  2508.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2509.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2510.       },
  2511.       onprogress: Req.getImageProgress,
  2512.     });
  2513.     Bar.set(false);
  2514.     const type = Req.guessMimeType(response);
  2515.     let b = response.response;
  2516.     if (!b) throw 'Empty response';
  2517.     if (b.type !== type)
  2518.       b = b.slice(0, b.size, type);
  2519.     const res = xhr === 'blob'
  2520.       ? (ai.blobUrl = URL.createObjectURL(b))
  2521.       : await Req.blobToDataUrl(b);
  2522.     return [res, type.startsWith('video')];
  2523.   },
  2524.  
  2525.   getImageProgress(e) {
  2526.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2527.       ai.bufBar = true;
  2528.     if (ai.bufBar) {
  2529.       const pct = e.loaded / e.total * 100 | 0;
  2530.       const size = e.total / 1024 | 0;
  2531.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2532.     }
  2533.   },
  2534.  
  2535.   async findRedirect() {
  2536.     try {
  2537.       const {finalUrl} = await Req.gmXhr(ai.url, {
  2538.         method: 'HEAD',
  2539.         headers: {
  2540.           'Referer': location.href.split('#', 1)[0],
  2541.         },
  2542.       });
  2543.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2544.       if (!info || !info.url)
  2545.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2546.       Object.assign(ai, info);
  2547.       App.startSingle();
  2548.     } catch (e) {
  2549.       App.handleError(e);
  2550.     }
  2551.   },
  2552.  
  2553.   async saveFile() {
  2554.     const url = ai.popup.src || ai.popup.currentSrc;
  2555.     let name = Req.getFileName(ai.imageUrl || url);
  2556.     if (!name.includes('.'))
  2557.       name += '.jpg';
  2558.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2559.       $new('a', {href: url, download: name})
  2560.         .dispatchEvent(new MouseEvent('click'));
  2561.     } else {
  2562.       Status.set('+loading');
  2563.       const onload = () => Status.set('-loading');
  2564.       const gmDL = typeof GM_download === 'function';
  2565.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2566.         url,
  2567.         name,
  2568.         headers: {Referer: url},
  2569.         method: 'get', // polyfilling GM_download
  2570.         responseType: 'blob', // polyfilling GM_download
  2571.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2572.         onerror: e => {
  2573.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2574.           onload();
  2575.         },
  2576.         onprogress: Req.getImageProgress,
  2577.         onload({response}) {
  2578.           onload();
  2579.           if (!gmDL) { // polyfilling GM_download
  2580.             const a = Object.assign(document.createElement('a'), {
  2581.               href: URL.createObjectURL(response),
  2582.               download: name,
  2583.             });
  2584.             a.dispatchEvent(new MouseEvent('click'));
  2585.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2586.           }
  2587.         },
  2588.       });
  2589.     }
  2590.   },
  2591.  
  2592.   getFileName(url) {
  2593.     return decodeURIComponent(url).split(/[#?&]/, 1)[0].split('/').pop();
  2594.   },
  2595.  
  2596.   blobToDataUrl(blob) {
  2597.     return new Promise((resolve, reject) => {
  2598.       const fr = new FileReader();
  2599.       fr.onload = () => resolve(fr.result);
  2600.       fr.onerror = reject;
  2601.       fr.readAsDataURL(blob);
  2602.     });
  2603.   },
  2604.  
  2605.   guessMimeType({responseHeaders, finalUrl}) {
  2606.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2607.         !RegExp.$1.includes('text/plain'))
  2608.       return RegExp.$1;
  2609.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2610.     switch (ext.toLowerCase()) {
  2611.       case 'bmp': return 'image/bmp';
  2612.       case 'gif': return 'image/gif';
  2613.       case 'jpe': return 'image/jpeg';
  2614.       case 'jpeg': return 'image/jpeg';
  2615.       case 'jpg': return 'image/jpeg';
  2616.       case 'mp4': return 'video/mp4';
  2617.       case 'png': return 'image/png';
  2618.       case 'svg': return 'image/svg+xml';
  2619.       case 'tif': return 'image/tiff';
  2620.       case 'tiff': return 'image/tiff';
  2621.       case 'webm': return 'video/webm';
  2622.       default: return 'application/octet-stream';
  2623.     }
  2624.   },
  2625.  
  2626.   findImageUrl(n, url) {
  2627.     if (!n) return;
  2628.     let html;
  2629.     const path =
  2630.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2631.       n.getAttribute('src') ||
  2632.       n.getAttribute('data-m4v') ||
  2633.       n.getAttribute('href') ||
  2634.       n.getAttribute('content') ||
  2635.       (html = n.outerHTML).includes('http') &&
  2636.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2637.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2638.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2639.   },
  2640. };
  2641.  
  2642. const Status = {
  2643.  
  2644.   set(status) {
  2645.     if (!status && !cfg.globalStatus) {
  2646.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2647.       return;
  2648.     }
  2649.     const prefix = cfg.globalStatus ? PREFIX : '';
  2650.     const action = status && /^[+-]/.test(status) && status[0];
  2651.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2652.     const el = cfg.globalStatus ? doc.documentElement :
  2653.       name === 'edge' ? ai.popup :
  2654.         ai.node;
  2655.     if (!el) return;
  2656.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2657.     const oldValue = (el.getAttribute(attr) || '').trim();
  2658.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2659.     switch (action) {
  2660.       case '-':
  2661.         cls.delete(name);
  2662.         break;
  2663.       case false:
  2664.         for (const c of cls)
  2665.           if (c.startsWith(prefix) && c !== name)
  2666.             cls.delete(c);
  2667.       // fallthrough to +
  2668.       case '+':
  2669.         if (name)
  2670.           cls.add(name);
  2671.         break;
  2672.     }
  2673.     const newValue = [...cls].join(' ');
  2674.     if (newValue !== oldValue)
  2675.       el.setAttribute(attr, newValue);
  2676.   },
  2677.  
  2678.   loading(force) {
  2679.     if (!force) {
  2680.       clearTimeout(ai.timerStatus);
  2681.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2682.     } else if (!ai.popupLoaded) {
  2683.       Status.set('+loading');
  2684.     }
  2685.   },
  2686. };
  2687.  
  2688. const UrlMatcher = (() => {
  2689.   // string-to-regexp escaped chars
  2690.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2691.   // rx for '^' symbol in simple url match
  2692.   const RX_SEP = /[^\w%._-]/y;
  2693.   const RXS_SEP = RX_SEP.source;
  2694.   return match => {
  2695.     const results = [];
  2696.     for (const s of ensureArray(match)) {
  2697.       const pinDomain = s.startsWith('||');
  2698.       const pinStart = !pinDomain && s.startsWith('|');
  2699.       const endSep = s.endsWith('^');
  2700.       let fn;
  2701.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2702.       if (needle.includes('^')) {
  2703.         let plain = '';
  2704.         for (const part of needle.split('^'))
  2705.           if (part.length > plain.length)
  2706.             plain = part;
  2707.         const rx = new RegExp(
  2708.           (pinStart ? '^' : '') +
  2709.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2710.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2711.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2712.         needle = [plain, rx];
  2713.         fn = regexp;
  2714.       } else if (pinStart) {
  2715.         fn = endSep ? equals : starts;
  2716.       } else if (pinDomain) {
  2717.         const slashPos = needle.indexOf('/');
  2718.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2719.         needle = [needle, domain, slashPos > 0, endSep];
  2720.         fn = startsDomainPrescreen;
  2721.       } else if (endSep) {
  2722.         fn = ends;
  2723.       } else {
  2724.         fn = has;
  2725.       }
  2726.       results.push({fn, data: needle});
  2727.     }
  2728.     return results.length > 1 ?
  2729.       {fn: checkArray, data: results} :
  2730.       results[0];
  2731.   };
  2732.   function checkArray(s) {
  2733.     return this.some(checkArrayItem, s);
  2734.   }
  2735.   function checkArrayItem(item) {
  2736.     return item.fn.call(item.data, this);
  2737.   }
  2738.   function ends(s) {
  2739.     return s.endsWith(this) || (
  2740.       s.length > this.length &&
  2741.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2742.       endsWithSep(s));
  2743.   }
  2744.   function endsWithSep(s, pos = s.length - 1) {
  2745.     RX_SEP.lastIndex = pos;
  2746.     return RX_SEP.test(s);
  2747.   }
  2748.   function equals(s) {
  2749.     return s.startsWith(this) && (
  2750.       s.length === this.length ||
  2751.       s.length === this.length + 1 && endsWithSep(s));
  2752.   }
  2753.   function has(s) {
  2754.     return s.includes(this);
  2755.   }
  2756.   function regexp(s) {
  2757.     return s.includes(this[0]) && this[1].test(s);
  2758.   }
  2759.   function starts(s) {
  2760.     return s.startsWith(this);
  2761.   }
  2762.   function startsDomainPrescreen(url) {
  2763.     return url.includes(this[0]) && startsDomain.call(this, url);
  2764.   }
  2765.   function startsDomain(url) {
  2766.     let hostStart = url.indexOf('//');
  2767.     if (hostStart && url[hostStart - 1] !== ':')
  2768.       return;
  2769.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2770.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2771.     const [needle, domain, pinDomainEnd, endSep] = this;
  2772.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2773.     for (; ; start++) {
  2774.       start = host.indexOf(domain, start);
  2775.       if (start < 0)
  2776.         return;
  2777.       if (!start || host[start - 1] === '.')
  2778.         break;
  2779.     }
  2780.     start += hostStart;
  2781.     if (url.lastIndexOf(needle, start) !== start)
  2782.       return;
  2783.     const end = start + needle.length;
  2784.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2785.   }
  2786. })();
  2787.  
  2788. const Util = {
  2789.  
  2790.   addStyle(name, css) {
  2791.     const id = `${PREFIX}style:${name}`;
  2792.     const el = doc.getElementById(id) ||
  2793.                css && $new('style', {id});
  2794.     if (!el) return;
  2795.     if (el.textContent !== css)
  2796.       el.textContent = css;
  2797.     if (el.parentElement !== doc.head)
  2798.       doc.head.appendChild(el);
  2799.     return el;
  2800.   },
  2801.  
  2802.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2803.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2804.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2805.   },
  2806.  
  2807.   decodeHtmlEntities(s) {
  2808.     return s
  2809.       .replace(/&quot;/g, '"')
  2810.       .replace(/&apos;/g, '\'')
  2811.       .replace(/&lt;/g, '<')
  2812.       .replace(/&gt;/g, '>')
  2813.       .replace(/&amp;/g, '&');
  2814.   },
  2815.  
  2816.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2817.   decodeUrl(url) {
  2818.     if (!url || typeof url !== 'string') return url;
  2819.     const iPct = url.indexOf('%');
  2820.     const iColon = url.indexOf(':');
  2821.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2822.       decodeURIComponent(url) :
  2823.       url;
  2824.   },
  2825.  
  2826.   deepEqual(a, b) {
  2827.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2828.       return a === b;
  2829.     if (isArray(a)) {
  2830.       return isArray(b) &&
  2831.         a.length === b.length &&
  2832.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2833.     }
  2834.     const keys = Object.keys(a);
  2835.     return keys.length === Object.keys(b).length &&
  2836.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2837.   },
  2838.  
  2839.   elShown: el => el && el.classList.contains(PREFIX + 'show'),
  2840.  
  2841.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2842.  
  2843.   forceLayout(node) {
  2844.     // eslint-disable-next-line no-unused-expressions
  2845.     node.clientHeight;
  2846.   },
  2847.  
  2848.   formatError(e, rule) {
  2849.     const msg = e.message;
  2850.     const {url: u, imageUrl: iu} = ai;
  2851.     e = msg ? e :
  2852.       e.readyState && 'Request failed.' ||
  2853.       e.type === 'error' && `File can't be displayed.${
  2854.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2855.       }` ||
  2856.       e;
  2857.     let fmt;
  2858.     const res = [
  2859.       fmt = '%c%s%c', 'font-weight:bold', e, 'font-weight:normal',
  2860.       (fmt += '\nNode: %o', ai.node),
  2861.       (fmt += '\nRule: %o', rule),
  2862.       u && (fmt += '\nURL: %s', u),
  2863.       iu && iu !== u && (fmt += '\nFile: %s', iu),
  2864.       e.stack,
  2865.     ].filter(Boolean);
  2866.     res[0] = fmt;
  2867.     res.message = msg || e;
  2868.     return res;
  2869.   },
  2870.  
  2871.   getReactChildren(el, path) {
  2872.     if (isFF) el = el.wrappedJSObject || el;
  2873.     for (const k of Object.keys(el))
  2874.       if (typeof k === 'string' && k.startsWith('__reactProps'))
  2875.         return (el = el[k].children) && (path ? pick(el, path) : el);
  2876.   },
  2877.  
  2878.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2879.  
  2880.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2881.  
  2882.   newFunction(...args) {
  2883.     try {
  2884.       return App.NOP || (trustedScript
  2885.         // eslint-disable-next-line no-eval
  2886.         ? window.eval(trustedScript(`(function anonymous(${args.slice(0, -1).join(',')}){${args.slice(-1)[0]}})`))
  2887.         : new Function(...args)
  2888.       );
  2889.     } catch (e) {
  2890.       if (!RX_EVAL_BLOCKED.test(e.message))
  2891.         throw e;
  2892.       App.NOP = () => {};
  2893.       return App.NOP;
  2894.     }
  2895.   },
  2896.  
  2897.   rel2abs(rel, abs = location.href) {
  2898.     try {
  2899.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2900.         new URL(rel, abs).href;
  2901.     } catch (e) {
  2902.       return rel;
  2903.     }
  2904.   },
  2905.  
  2906.   stringify(...args) {
  2907.     const p = Array.prototype;
  2908.     const {toJSON} = p;
  2909.     if (toJSON) p.toJSON = null;
  2910.     const res = JSON.stringify(...args);
  2911.     if (toJSON) p.toJSON = toJSON;
  2912.     return res;
  2913.   },
  2914.  
  2915.   suppressTooltip() {
  2916.     for (const node of [
  2917.       ai.node.parentNode,
  2918.       ai.node,
  2919.       ai.node.firstElementChild,
  2920.     ]) {
  2921.       const t = (node || 0).title;
  2922.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2923.         ai.tooltip = {node, text: t};
  2924.         node.title = '';
  2925.         break;
  2926.       }
  2927.     }
  2928.   },
  2929.  
  2930.   tabFixUrl() {
  2931.     const {tabfix = App.tabfix} = ai.rule;
  2932.     return tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2933.            flattenHtml(`data:text/html;charset=utf8,
  2934.       <style>
  2935.         body {
  2936.           margin: 0;
  2937.           padding: 0;
  2938.           background: #222;
  2939.         }
  2940.         .fit {
  2941.           overflow: hidden
  2942.         }
  2943.         .fit > img {
  2944.           max-width: 100vw;
  2945.           max-height: 100vh;
  2946.         }
  2947.         body > img {
  2948.           margin: auto;
  2949.           position: absolute;
  2950.           left: 0;
  2951.           right: 0;
  2952.           top: 0;
  2953.           bottom: 0;
  2954.         }
  2955.       </style>
  2956.       <body class=fit>
  2957.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2958.       </body>
  2959.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2960.   },
  2961. };
  2962.  
  2963. async function setup({rule} = {}) {
  2964.   if (!isFunction(doc.body.attachShadow)) {
  2965.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2966.           'You can edit the script\'s storage directly in your userscript manager.');
  2967.     return;
  2968.   }
  2969.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2970.   let uiCfg;
  2971.   let root = (elSetup || 0).shadowRoot;
  2972.   let {blankRuleElement} = setup;
  2973.   /** @type NodeList */
  2974.   const UI = new Proxy({}, {
  2975.     get(_, id) {
  2976.       return root.getElementById(id);
  2977.     },
  2978.   });
  2979.   if (!rule || !elSetup)
  2980.     init(await Config.load({save: true}));
  2981.   if (rule)
  2982.     installRule(rule);
  2983.  
  2984.   function init(data) {
  2985.     uiCfg = data;
  2986.     $remove(elSetup);
  2987.     elSetup = $new('div', {contentEditable: true});
  2988.     root = elSetup.attachShadow({mode: 'open'});
  2989.     root.append(...createSetupElement());
  2990.     initEvents();
  2991.     renderAll();
  2992.     renderCustomScales();
  2993.     renderRules();
  2994.     doc.body.appendChild(elSetup);
  2995.     requestAnimationFrame(() => {
  2996.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elSetup.clientHeight / 4) + 'px';
  2997.     });
  2998.   }
  2999.  
  3000.   function initEvents() {
  3001.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  3002.     UI._export.onclick = e => {
  3003.       dropEvent(e);
  3004.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  3005.       UI._exportNotification.hidden = false;
  3006.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  3007.     };
  3008.     UI._import.onclick = e => {
  3009.       dropEvent(e);
  3010.       const s = prompt('Paste settings:');
  3011.       if (s)
  3012.         init(new Config({data: s}));
  3013.     };
  3014.     UI._install.onclick = setupRuleInstaller;
  3015.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  3016.     UI._reveal.onclick = e => {
  3017.       e.preventDefault();
  3018.       cssApp.hidden = !cssApp.hidden;
  3019.       if (!cssApp.hidden) {
  3020.         if (!cssApp.value) {
  3021.           App.updateStyles();
  3022.           cssApp.value = App.globalStyle.trim();
  3023.           cssApp.setSelectionRange(0, 0);
  3024.         }
  3025.         cssApp.focus();
  3026.       }
  3027.     };
  3028.     UI.start.onchange = function () {
  3029.       UI.delay.closest('label').hidden =
  3030.         UI.preload.closest('label').hidden =
  3031.           this.value !== 'auto';
  3032.     };
  3033.     UI.start.onchange();
  3034.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  3035.     // color
  3036.     for (const el of $$('[type="color"]', root)) {
  3037.       el.oninput = colorOnInput;
  3038.       el.elSwatch = el.nextElementSibling;
  3039.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  3040.       el.elOpacity.elColor = el;
  3041.     }
  3042.     function colorOnInput() {
  3043.       this.elSwatch.style.setProperty('--color',
  3044.         Util.color(this.value, this.elOpacity.valueAsNumber));
  3045.     }
  3046.     // range
  3047.     for (const el of $$('[type="range"]', root)) {
  3048.       el.oninput = rangeOnInput;
  3049.       el.onblur = rangeOnBlur;
  3050.       el.addEventListener('focusin', rangeOnFocus);
  3051.     }
  3052.     function rangeOnBlur(e) {
  3053.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  3054.         this.elEdit.onblur(e);
  3055.     }
  3056.     function rangeOnFocus() {
  3057.       if (this.elEdit) return;
  3058.       const {min, max, step, value} = this;
  3059.       this.elEdit = $new('input', {
  3060.         value, min, max, step,
  3061.         className: 'range-edit',
  3062.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3063.         type: 'number',
  3064.         elRange: this,
  3065.         onblur: rangeEditOnBlur,
  3066.         oninput: rangeEditOnInput,
  3067.       });
  3068.       this.insertAdjacentElement('afterend', this.elEdit);
  3069.     }
  3070.     function rangeOnInput() {
  3071.       this.title = (this.dataset.title || '').replace('$', this.value);
  3072.       if (this.elColor) this.elColor.oninput();
  3073.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3074.     }
  3075.     // range-edit
  3076.     function rangeEditOnBlur(e) {
  3077.       if (e.relatedTarget !== this.elRange) {
  3078.         this.remove();
  3079.         this.elRange.elEdit = null;
  3080.       }
  3081.     }
  3082.     function rangeEditOnInput() {
  3083.       this.elRange.valueAsNumber = this.valueAsNumber;
  3084.       this.elRange.oninput();
  3085.     }
  3086.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3087.     // which may happen since it sees only the outer <div> in the event |target|
  3088.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3089.   }
  3090.  
  3091.   function closeSetup(event) {
  3092.     const isApply = this.id === '_apply';
  3093.     if (event && (this.id === '_ok' || isApply)) {
  3094.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3095.       Ruler.init();
  3096.       Menu.reRegisterAlt();
  3097.       if (isApply) {
  3098.         renderCustomScales();
  3099.         UI._css.textContent = cfg._getCss();
  3100.         return;
  3101.       }
  3102.     }
  3103.     $remove(elSetup);
  3104.     elSetup = null;
  3105.   }
  3106.  
  3107.   function collectConfig({save, clone} = {}) {
  3108.     let data = {};
  3109.     for (const el of $$('input[id], select[id]', root))
  3110.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3111.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3112.           el.value || '';
  3113.     Object.assign(data, {
  3114.       css: UI.css.value.trim(),
  3115.       delay: UI.delay.valueAsNumber * 1000,
  3116.       hosts: collectRules(),
  3117.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3118.       scales: UI.scales.value
  3119.         .trim()
  3120.         .split(/[,;]*\s+/)
  3121.         .map(x => x.replace(',', '.'))
  3122.         .filter(x => !isNaN(parseFloat(x))),
  3123.     });
  3124.     if (clone)
  3125.       data = JSON.parse(Util.stringify(data));
  3126.     return new Config({data, save});
  3127.   }
  3128.  
  3129.   function collectRules() {
  3130.     return [...UI._rules.children]
  3131.       .map(el => [el.value.trim(), el[RULE]])
  3132.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3133.       .map(([s, json]) => json || s)
  3134.       .filter(Boolean);
  3135.   }
  3136.  
  3137.   function checkRule({target: el}) {
  3138.     let json, error, title;
  3139.     const prev = el.previousElementSibling;
  3140.     if (el.value) {
  3141.       json = Ruler.parse(el.value);
  3142.       error = json instanceof Error && (json.message || String(json));
  3143.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3144.         !/^[-.a-z0-9]*$/i.test(json.d);
  3145.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3146.         .filter(Boolean).join('\n');
  3147.       el.classList.toggle('invalid-domain', invalidDomain);
  3148.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3149.       if (!prev)
  3150.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3151.     } else if (prev) {
  3152.       prev.focus();
  3153.       el.remove();
  3154.     }
  3155.     el[RULE] = !error && json;
  3156.     el.title = title;
  3157.     el.setCustomValidity(error || '');
  3158.   }
  3159.  
  3160.   async function focusRule({target: el, relatedTarget: from}) {
  3161.     if (el === this)
  3162.       return;
  3163.     await new Promise(setTimeout);
  3164.     if (el[RULE] && el.rows < 2) {
  3165.       let i = el.selectionStart;
  3166.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3167.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3168.       el.setSelectionRange(i, i);
  3169.       el.rows = txt.match(/^/gm).length;
  3170.     }
  3171.     if (!this.contains(from))
  3172.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3173.   }
  3174.  
  3175.   function installRule(rule) {
  3176.     const inputs = UI._rules.children;
  3177.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3178.     if (!el) {
  3179.       el = inputs[0];
  3180.       el[RULE] = rule;
  3181.       el.value = Ruler.format(rule);
  3182.       el.hidden = false;
  3183.       const i = Math.max(0, collectRules().indexOf(rule));
  3184.       inputs[i].insertAdjacentElement('afterend', el);
  3185.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3186.     }
  3187.     const rect = el.getBoundingClientRect();
  3188.     if (rect.bottom < 0 ||
  3189.         rect.bottom > el.parentNode.offsetHeight)
  3190.       el.scrollIntoView();
  3191.     el.classList.add('highlight');
  3192.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3193.     el.focus();
  3194.   }
  3195.  
  3196.   function renderRules() {
  3197.     const rules = UI._rules;
  3198.     rules.addEventListener('input', checkRule);
  3199.     rules.addEventListener('focusin', focusRule);
  3200.     rules.addEventListener('paste', focusRule);
  3201.     blankRuleElement =
  3202.       setup.blankRuleElement =
  3203.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3204.     for (const rule of uiCfg.hosts || []) {
  3205.       const el = blankRuleElement.cloneNode();
  3206.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3207.       rules.appendChild(el);
  3208.       checkRule({target: el});
  3209.     }
  3210.     const search = UI._search;
  3211.     search.oninput = () => {
  3212.       setup.search = search.value;
  3213.       const s = search.value.toLowerCase();
  3214.       for (const el of rules.children)
  3215.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3216.     };
  3217.     search.value = setup.search || '';
  3218.     if (search.value)
  3219.       search.oninput();
  3220.   }
  3221.  
  3222.   function renderCustomScales() {
  3223.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3224.   }
  3225.  
  3226.   function renderAll() {
  3227.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3228.       if (el.id in uiCfg)
  3229.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3230.     for (const el of $$('input[type="range"]', root))
  3231.       el.oninput();
  3232.     for (const el of $$('a[href^="http"]', root))
  3233.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3234.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3235.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3236.   }
  3237. }
  3238.  
  3239. function setupClickedRule(event) {
  3240.   let rule;
  3241.   const el = event.target.closest('blockquote, code, pre');
  3242.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3243.     dropEvent(event);
  3244.     setup({rule});
  3245.   }
  3246. }
  3247.  
  3248. async function setupRuleInstaller(e) {
  3249.   dropEvent(e);
  3250.   const parent = this.parentElement;
  3251.   parent.children._installLoading.hidden = false;
  3252.   this.remove();
  3253.   let rules;
  3254.  
  3255.   try {
  3256.     rules = extractRules(await Req.getDoc(this.href));
  3257.     const selector = $new('select', {
  3258.       size: 8,
  3259.       style: 'width: 100%',
  3260.       selectedIndex: findMatchingRuleIndex(),
  3261.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3262.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3263.     }, rules.map(renderRule));
  3264.     parent.children._installLoading.remove();
  3265.     parent.children._installHint.hidden = false;
  3266.     parent.appendChild(selector);
  3267.     requestAnimationFrame(() => {
  3268.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3269.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3270.       selector.focus();
  3271.     });
  3272.   } catch (e) {
  3273.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3274.   }
  3275.  
  3276.   function extractRules({doc}) {
  3277.     // sort by name
  3278.     return [...$$('#wiki-body tr', doc)]
  3279.       .map(tr => [
  3280.         tr.cells[0].textContent.trim(),
  3281.         Ruler.fromElement(tr.cells[1]),
  3282.       ])
  3283.       .filter(([name, r]) =>
  3284.         name && r && (!r.d || hostname.includes(r.d)))
  3285.       .sort(([a], [b]) =>
  3286.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3287.           a > b ? 1 :
  3288.             0);
  3289.   }
  3290.  
  3291.   function findMatchingRuleIndex() {
  3292.     const dottedHost = `.${hostname}.`;
  3293.     let maxCount = 0, maxIndex = 0, index = 0;
  3294.     for (const [name, {d}] of rules) {
  3295.       let count = !!(d && hostname.includes(d)) * 10;
  3296.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3297.         count += dottedHost.includes(`.${part}.`) && part.length;
  3298.       if (count > maxCount) {
  3299.         maxCount = count;
  3300.         maxIndex = index;
  3301.       }
  3302.       index++;
  3303.     }
  3304.     return maxIndex;
  3305.   }
  3306.  
  3307.   function renderRule([name, rule]) {
  3308.     return $new('option', {
  3309.       textContent: name,
  3310.       title: Ruler.format(rule, {expand: true})
  3311.         .replace(/^{|\s*}$/g, '')
  3312.         .split('\n')
  3313.         .slice(0, 12)
  3314.         .map(renderTitleLine)
  3315.         .filter(Boolean)
  3316.         .join('\n'),
  3317.     });
  3318.   }
  3319.  
  3320.   function renderTitleLine(line, i, arr) {
  3321.     return (
  3322.       // show ... on 10th line if there are more lines
  3323.       i === 9 && arr.length > 10 ? '...' :
  3324.         i > 10 ? '' :
  3325.           // truncate to 100 chars
  3326.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3327.             // strip the leading space
  3328.             .replace(/^\s/, ''));
  3329.   }
  3330.  
  3331.   function maybeSetup(e) {
  3332.     if (!eventModifiers(e))
  3333.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3334.   }
  3335. }
  3336.  
  3337. const CSS_SETUP = /*language=css*/ `
  3338.   :host {
  3339.     all: initial !important;
  3340.     position: fixed !important;
  3341.     z-index: 2147483647 !important;
  3342.     top: 20px !important;
  3343.     right: 20px !important;
  3344.     padding: 1.5em !important;
  3345.     color: #000 !important;
  3346.     background: #eee !important;
  3347.     box-shadow: 5px 5px 25px 2px #000 !important;
  3348.     width: 33em !important;
  3349.     border: 1px solid black !important;
  3350.     display: flex !important;
  3351.     flex-direction: column !important;
  3352.   }
  3353.   main {
  3354.     font: 12px/15px sans-serif;
  3355.   }
  3356.   table {
  3357.     text-align:left;
  3358.   }
  3359.   ul {
  3360.     max-height: calc(100vh - 200px);
  3361.     margin: 0 0 15px 0;
  3362.     padding: 0;
  3363.     list-style: none;
  3364.   }
  3365.   li {
  3366.     margin: 0;
  3367.     padding: .25em 0;
  3368.   }
  3369.   li.options {
  3370.     display: flex;
  3371.     align-items: center;
  3372.     justify-content: space-between;
  3373.   }
  3374.   li.row {
  3375.     align-items: start;
  3376.     flex-wrap: wrap;
  3377.   }
  3378.   li.row label {
  3379.     display: flex;
  3380.     flex-direction: row;
  3381.     align-items: center;
  3382.   }
  3383.   li.row input {
  3384.     margin-right: .25em;
  3385.   }
  3386.   li.stretch label {
  3387.     flex: 1;
  3388.     white-space: nowrap;
  3389.   }
  3390.   li.stretch label > span {
  3391.     display: flex;
  3392.     flex-direction: row;
  3393.     flex: 1;
  3394.   }
  3395.   label {
  3396.     display: inline-flex;
  3397.     flex-direction: column;
  3398.   }
  3399.   label:not(:last-child) {
  3400.     margin-right: 1em;
  3401.   }
  3402.   input, select {
  3403.     min-height: 1.3em;
  3404.     box-sizing: border-box;
  3405.   }
  3406.   input[type=checkbox] {
  3407.     margin-left: 0;
  3408.   }
  3409.   input[type=number] {
  3410.     width: 4em;
  3411.   }
  3412.   input:not([type=checkbox])  {
  3413.     padding: 0 .25em;
  3414.   }
  3415.   input[type=range] {
  3416.     flex: 1;
  3417.     width: 100%;
  3418.     margin: 0 .25em;
  3419.     padding: 0;
  3420.     filter: saturate(0);
  3421.     opacity: .5;
  3422.   }
  3423.   u + input[type=range] {
  3424.     max-width: 3em;
  3425.   }
  3426.   input[type=range]:hover {
  3427.     filter: none;
  3428.     opacity: 1;
  3429.   }
  3430.   input[type=color] {
  3431.     position: absolute;
  3432.     width: calc(1.5em + 2px);
  3433.     opacity: 0;
  3434.     cursor: pointer;
  3435.   }
  3436.   u {
  3437.     position: relative;
  3438.     flex: 0 0 1.5em;
  3439.     height: 1.5em;
  3440.     border: 1px solid #888;
  3441.     pointer-events: none;
  3442.     color: #888;
  3443.     background-image:
  3444.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3445.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3446.     background-size: .5em .5em;
  3447.     background-position: 0 0, .25em .25em;
  3448.   }
  3449.   u::after {
  3450.     position: absolute;
  3451.     top: 0;
  3452.     left: 0;
  3453.     right: 0;
  3454.     bottom: 0;
  3455.     content: "";
  3456.     background-color: var(--color);
  3457.   }
  3458.   .range-edit {
  3459.     position: absolute;
  3460.     box-shadow: 0 0.25em 1em #000;
  3461.     z-index: 99;
  3462.   }
  3463.   textarea {
  3464.     resize: vertical;
  3465.     margin: 1px 0;
  3466.     font: 11px/1.25 Consolas, monospace;
  3467.   }
  3468.   :invalid {
  3469.     background-color: #f002;
  3470.     border-color: #800;
  3471.   }
  3472.   code {
  3473.     font-weight: bold;
  3474.   }
  3475.   a {
  3476.     text-decoration: none;
  3477.     color: LinkText;
  3478.     cursor: pointer;
  3479.   }
  3480.   a:hover {
  3481.     text-decoration: underline;
  3482.   }
  3483.   button {
  3484.     padding: .2em 1em;
  3485.     margin: 0 1em;
  3486.   }
  3487.   kbd {
  3488.     padding: 1px 6px;
  3489.     font-weight: bold;
  3490.     font-family: Consolas, monospace;
  3491.     border: 1px solid #888;
  3492.     border-radius: 3px;
  3493.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3494.   }
  3495.   .column {
  3496.     display: flex;
  3497.     flex-direction: column;
  3498.   }
  3499.   .highlight {
  3500.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3501.     animation-fill-mode: both;
  3502.   }
  3503.   #_rules > * {
  3504.     word-break: break-all;
  3505.   }
  3506.   #_rules > :not(:focus) {
  3507.     overflow: hidden; /* prevents wrapping in FF */
  3508.   }
  3509.   .invalid-domain {
  3510.     opacity: .5;
  3511.   }
  3512.   .matching-domain {
  3513.     border-color: #56b8ff;
  3514.     background: #d7eaff;
  3515.   }
  3516.   #_x {
  3517.     position: absolute;
  3518.     top: 0;
  3519.     right: 0;
  3520.     padding: 4px 8px;
  3521.     cursor: pointer;
  3522.     user-select: none;
  3523.   }
  3524.   #_x:hover {
  3525.     background-color: #8884;
  3526.   }
  3527.   #_cssApp {
  3528.     color: seagreen;
  3529.   }
  3530.   #_exportNotification {
  3531.     color: green;
  3532.     font-weight: bold;
  3533.     position: absolute;
  3534.     left: 0;
  3535.     right: 0;
  3536.     bottom: 2px;
  3537.   }
  3538.   #_installHint {
  3539.     color: green;
  3540.   }
  3541.   #_usage {
  3542.     display: flex;
  3543.     flex-wrap: wrap;
  3544.     align-items: flex-start;
  3545.     gap: 1em;
  3546.   }
  3547.   #_usage th {
  3548.     font-weight: normal;
  3549.     padding-right: .5em;
  3550.   }
  3551.   #_usage tr:nth-last-child(n + 2) > :not(br) {
  3552.     white-space: pre-line;
  3553.     border-bottom: 1px dotted #8888;
  3554.   }
  3555.   #_usage kbd {
  3556.     font-family: monospace;
  3557.     font-weight: bold;
  3558.   }
  3559.   @keyframes fade-in {
  3560.     from { background-color: deepskyblue }
  3561.     to {}
  3562.   }
  3563.   @media (prefers-color-scheme: dark) {
  3564.     :host {
  3565.       color: #aaa !important;
  3566.       background: #333 !important;
  3567.     }
  3568.     a {
  3569.       color: deepskyblue;
  3570.     }
  3571.     button {
  3572.       background: linear-gradient(-5deg, #333, #555);
  3573.       border: 1px solid #000;
  3574.       box-shadow: 0 2px 6px #181818;
  3575.       border-radius: 3px;
  3576.       cursor: pointer;
  3577.     }
  3578.     button:hover {
  3579.       background: linear-gradient(-5deg, #333, #666);
  3580.     }
  3581.     textarea, input, select {
  3582.       background: #111;
  3583.       color: #BBB;
  3584.       border: 1px solid #555;
  3585.     }
  3586.     input[type=checkbox] {
  3587.       filter: invert(1);
  3588.     }
  3589.     input[type=range] {
  3590.       filter: invert(1) saturate(0);
  3591.     }
  3592.     input[type=range]:hover {
  3593.       filter: invert(1);
  3594.     }
  3595.     kbd {
  3596.       border-color: #666;
  3597.     }
  3598.     @supports (-moz-appearance: none) {
  3599.       input[type=checkbox],
  3600.       input[type=range],
  3601.       input[type=range]:hover {
  3602.         filter: none;
  3603.       }
  3604.     }
  3605.     .range-edit {
  3606.       box-shadow: 0 .5em 1em .5em #000;
  3607.     }
  3608.     .matching-domain {
  3609.       border-color: #0065af;
  3610.       background: #032b58;
  3611.       color: #ddd;
  3612.     }
  3613.     #_cssApp {
  3614.       color: darkseagreen;
  3615.     }
  3616.     #_installHint {
  3617.       color: greenyellow;
  3618.     }
  3619.     ::-webkit-scrollbar {
  3620.       width: 14px;
  3621.       height: 14px;
  3622.       background: #333;
  3623.     }
  3624.     ::-webkit-scrollbar-button:single-button {
  3625.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3626.     }
  3627.     ::-webkit-scrollbar-track-piece {
  3628.       background: #444;
  3629.       border: 4px solid #333;
  3630.       border-radius: 8px;
  3631.     }
  3632.     ::-webkit-scrollbar-thumb {
  3633.       border: 3px solid #333;
  3634.       border-radius: 8px;
  3635.       background: #666;
  3636.     }
  3637.     ::-webkit-resizer {
  3638.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3639.       border: 2px solid transparent;
  3640.     }
  3641.   }
  3642. `;
  3643.  
  3644. function createSetupElement() {
  3645.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3646.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3647.   const $newLink = (text, href, props) =>
  3648.     $new('a', Object.assign({target: '_blank'}, href && {href}, props), text);
  3649.   const $newCheck = (label, id, title = '', props) =>
  3650.     $new('label', Object.assign({title}, props), [
  3651.       $new('input', {id, type: 'checkbox'}),
  3652.       label,
  3653.     ]);
  3654.   const $newKbd = s => s[0] === '{' ? $new('kbd', s.slice(1, -1)) : s;
  3655.   const $newRange = (id, title = '', min = 0, max = 100, step = 1, type = 'range') =>
  3656.     $new('input', {id, min, max, step, type, 'data-title': title});
  3657.   const $newSelect = (label, id, values) =>
  3658.     $new('label', [
  3659.       label,
  3660.       $new('select', {id}, Object.entries(values).map(([k, v]) =>
  3661.         $new('option', Object.assign({value: k}, typeof v === 'object' ? v : {textContent: v})))),
  3662.     ]);
  3663.   const $newTR = ([name, val]) =>
  3664.     $new('tr', !name ? $new('br') : [
  3665.       $new('th', ((name = name.split(/(\n)/))[0] = $new('b', name[0])) && name),
  3666.       $new('td', val.split(/({.+?})/).map($newKbd)),
  3667.     ]);
  3668.   return [
  3669.     $new('style', CSS_SETUP),
  3670.     $new('style#_css', cfg._getCss()),
  3671.     $new(`main#${PREFIX}setup`, [
  3672.       $new('div#_x', 'x'),
  3673.       $new('ul.column', [
  3674.         $new('details', {style: 'order:1; padding-top: .5em;'}, [
  3675.           $new('summary', {style: 'cursor: pointer'},
  3676.             $new('b', 'Help & hotkeys')),
  3677.           $new('#_usage', [
  3678.             $new('table', [
  3679.               ['Activate', 'hover the target'],
  3680.               ['Deactivate', 'move cursor off target, or click, or zoom out fully'],
  3681.               ['Ignore target', 'hold {Shift} ⏵ hover the target ⏵ release the key'],
  3682.               ['Freeze popup', 'hold {Shift} ⏵ leave the target ⏵ release the key'],
  3683.               ['Force-activate\n(videos or small pics)', 'hold {Ctrl} ⏵ hover the target ⏵ release the key'],
  3684.             ].map($newTR)),
  3685.             $new('table', [
  3686.               ['Start zooming', 'configurable (automatic or via right-click)\nor tap {Shift} while popup is visible'],
  3687.               ['Zoom', 'mouse wheel'],
  3688.               [],
  3689.               ['Rotate', '{L} {r} for "left" or "right"'],
  3690.               ['Flip/mirror', '{h} {v} for "horizontal" or "vertical"'],
  3691.               ['Previous/next\n(in album)', 'mouse wheel, {j} {k} or {←} {→} keys'],
  3692.             ].map($newTR)),
  3693.             $new('table', [
  3694.               ['Antialiasing', '{a}'],
  3695.               ['Caption in info', '{c}'],
  3696.               ['Download', '{d}'],
  3697.               ['Fullscreen', '{f}'],
  3698.               ['Info', '{i}'],
  3699.               ['Mute', '{m}'],
  3700.               ['Night mode', '{n}'],
  3701.               ['Open in tab', '{t}'],
  3702.             ].map($newTR)),
  3703.           ]),
  3704.         ]),
  3705.         $new('li.options.stretch', [
  3706.           $newSelect('Popup shows on', 'start', {
  3707.             context: 'Right-click / \u2261 / Ctrl',
  3708.             contextMK: 'Right-click / \u2261',
  3709.             contextM: 'Right-click',
  3710.             contextK: {
  3711.               textContent: '\u2261 key',
  3712.               title: '\u2261 is the Menu key (near the right Ctrl)',
  3713.             },
  3714.             ctrl: 'Ctrl',
  3715.             auto: 'automatically',
  3716.           }),
  3717.           $new('label', ['after, sec', $newRange('delay', 'seconds', .05, 10, .05, 'number')]),
  3718.           $new('label', {title: '(if the full version of the hovered image is ...% larger)'},
  3719.             ['if larger, %', $newRange('scale', null, 0, 100, 1, 'number')]),
  3720.           $newSelect('Zoom activates on', 'zoom', {
  3721.             context: 'Right click / Shift',
  3722.             wheel: 'Wheel up / Shift',
  3723.             shift: 'Shift',
  3724.             auto: 'automatically',
  3725.           }),
  3726.           $newSelect('...and zooms to', 'fit', {
  3727.             'all': 'fit to window',
  3728.             'large': 'fit if larger',
  3729.             'no': '100%',
  3730.             '': {textContent: 'custom', title: 'Use custom scale factors'},
  3731.           }),
  3732.         ]),
  3733.         $new('li.options', [
  3734.           $new('label', ['Zoom step, %', $newRange('zoomStep', null, 100, 400, 1, 'number')]),
  3735.           $newSelect('When fully zoomed out:', 'zoomOut', {
  3736.             stay: 'stay in zoom mode',
  3737.             auto: 'stay if still hovered',
  3738.             unzoom: 'undo zoom mode',
  3739.             close: 'close popup',
  3740.           }),
  3741.           $new('label', {
  3742.             style: 'flex: 1',
  3743.             title: `
  3744.               Scale factors to use when “zooms to” selector is set to “custom”.
  3745.               0 = fit to window,
  3746.               0! = same as 0 but also removes smaller values,
  3747.               * after a value marks the default zoom factor, for example: 1*
  3748.               The popup won't shrink below the image's natural size or window size for bigger mages.
  3749.               ${scalesHint}
  3750.             `.trim().replace(/\n\s+/g, '\r'),
  3751.           }, ['Custom scale factors:', $new('input#scales', {placeholder: scalesHint})]),
  3752.         ]),
  3753.         $new('li.options.row', [
  3754.           $new([
  3755.             $newCheck('Centered*', 'center',
  3756.               '...or try to keep the original link/thumbnail unobscured by the popup'),
  3757.             $newCheck('Preload on hover*', 'preload',
  3758.               'Provides smoother experience but increases network traffic'),
  3759.             $newCheck('Require Ctrl key for video', 'videoCtrl'),
  3760.             $newCheck('Mute videos*', 'mute', 'Hotkey: "m" in the popup'),
  3761.             $newCheck('Keep playing video*', 'keepVids',
  3762.               '...until you press Esc key or click elsewhere'),
  3763.             $newCheck('Keep preview on blur*', 'keepOnBlur',
  3764.               'i.e. when mouse pointer moves outside the page'),
  3765.           ]),
  3766.           $new([
  3767.             $newCheck('Wait for complete image*', 'waitLoad',
  3768.               '...or immediately show a partial image while still loading'),
  3769.             $new({style: 'display:flex; align-items:center'}, [
  3770.               $newCheck('Info: show for', 'uiInfo', 'Hotkey: "i" (or hold "Shift") in the popup'),
  3771.               $new('input#uiInfoHide', {min: 1, step: 'any', type: 'number'}),
  3772.               'sec',
  3773.             ]),
  3774.             $newCheck('Info: only once*', 'uiInfoOnce', '...or every time the info changes'),
  3775.             $newCheck('Info: caption*', 'uiInfoCaption', 'Hotkey: "c" in the popup'),
  3776.             $newCheck('Fade-in transition', 'uiFadein'),
  3777.             $newCheck('Fade-in transition in gallery', 'uiFadeinGallery'),
  3778.           ]),
  3779.           $new([
  3780.             $newCheck('Night mode*', 'night', 'Hotkey: "n" in the popup'),
  3781.             $newCheck('Run in image tabs', 'imgtab'),
  3782.             $newCheck('Spoof hotlinking*', 'xhr',
  3783.               'Disable only if you spoof the HTTP headers yourself'),
  3784.             $newCheck('Set status on <html>*', 'globalStatus',
  3785.               "Causes slowdowns so don't enable unless you explicitly use it in your custom CSS"),
  3786.             $newCheck('Auto-start switch in menu*', 'startAltShown',
  3787.               "Show a switch for 'auto-start' mode in userscript manager menu"),
  3788.           ]),
  3789.         ]),
  3790.         $new('li.options.stretch', [
  3791.           $new('label', [
  3792.             'Background',
  3793.             $new('span', [
  3794.               $new('input#uiBackgroundColor', {type: 'color'}), $new('u'),
  3795.               $newRange('uiBackgroundOpacity', 'Opacity: $%'),
  3796.             ]),
  3797.           ]),
  3798.           $new('label', [
  3799.             'Border color, opacity, size',
  3800.             $new('span', [
  3801.               $new('input#uiBorderColor', {type: 'color'}), $new('u'),
  3802.               $newRange('uiBorderOpacity', 'Opacity: $%'),
  3803.               $newRange('uiBorder', 'Border size: $px', 0, 20),
  3804.             ]),
  3805.           ]),
  3806.           $new('label', [
  3807.             'Shadow color, opacity, size',
  3808.             $new('span', [
  3809.               $new('input#uiShadowColor', {type: 'color'}), $new('u'),
  3810.               $newRange('uiShadowOpacity', 'Opacity: $%'),
  3811.               $newRange('uiShadow', 'Shadow blur radius: $px\n"0" disables the shadow.', 0, 20),
  3812.             ]),
  3813.           ]),
  3814.           $new('label', ['Padding', $new('span', $newRange('uiPadding', 'Padding: $px'))]),
  3815.           $new('label', ['Margin', $new('span', $newRange('uiMargin', 'Margin: $px'))]),
  3816.         ]),
  3817.         $new('li', [
  3818.           $newLink('Custom CSS:', `${MPIV_BASE_URL}Custom-CSS`),
  3819.           ' e.g. ', $new('b', '#mpiv-popup { animation: none !important }'),
  3820.           $newLink('View the built-in CSS', '', {
  3821.             id: '_reveal',
  3822.             tabIndex: 0,
  3823.             style: 'float: right',
  3824.             title: 'You can copy parts of it to override them in your custom CSS',
  3825.           }),
  3826.           $new('.column', [
  3827.             $new('textarea#css', {spellcheck: false}),
  3828.             $new('textarea#_cssApp', {spellcheck: false, hidden: true, readOnly: true, rows: 30}),
  3829.           ]),
  3830.         ]),
  3831.         $new('li', {style: 'display: flex; justify-content: space-between;'}, [
  3832.           $new('div',
  3833.             $newLink('Custom host rules:', `${MPIV_BASE_URL}Custom-host-rules`)),
  3834.           $new('div', {style: 'white-space: pre-line'}, [
  3835.             'To disable, put any symbol except ', $new('code', 'a..z 0..9 - .'),
  3836.             '\nin "d" value, for example ', $new('code', '"d": "!foo.com"'),
  3837.           ]),
  3838.           $new('div',
  3839.             $new('input#_search',
  3840.               {type: 'search', placeholder: 'Search', style: 'width: 10em; margin-left: 1em'})),
  3841.         ]),
  3842.         $new('li', {
  3843.           style: 'margin-left: -3px; margin-right: -3px; overflow-y: auto; ' +
  3844.                  'padding-left: 3px; padding-right: 3px;',
  3845.         }, [
  3846.           $new('div#_rules.column',
  3847.             $new('textarea', {spellcheck: false, rows: 1})),
  3848.         ]),
  3849.         $new('li', [
  3850.           $new('div#_installLoading', {hidden: true}, 'Loading...'),
  3851.           $new('div#_installHint', {hidden: true}, [
  3852.             'Double-click the rule (or select and press Enter) to add it. ',
  3853.             'Click ', $new('code', 'Apply'), ' or ', $new('code', 'OK'), ' to confirm.',
  3854.           ]),
  3855.           $newLink('Install rule from repository...', `${MPIV_BASE_URL}Rules`, {id: '_install'}),
  3856.         ]),
  3857.       ]),
  3858.       $new('div', {style: 'text-align:center'}, [
  3859.         $new('button#_ok', {accessKey: 'o'}, 'OK'),
  3860.         $new('button#_apply', {accessKey: 'a'}, 'Apply'),
  3861.         $new('button#_import', {style: 'margin-right: 0'}, 'Import'),
  3862.         $new('button#_export', {style: 'margin-left: 0'}, 'Export'),
  3863.         $new('button#_cancel', 'Cancel'),
  3864.         $new('div#_exportNotification', {hidden: true}, 'Copied to clipboard'),
  3865.       ]),
  3866.     ]),
  3867.   ];
  3868. }
  3869.  
  3870. function createGlobalStyle() {
  3871.   App.globalStyle = /*language=CSS*/ (String.raw`
  3872. #\mpiv-bar {
  3873.   position: fixed;
  3874.   z-index: 2147483647;
  3875.   top: 0;
  3876.   left: 0;
  3877.   right: 0;
  3878.   text-align: center;
  3879.   font-family: sans-serif;
  3880.   font-size: 15px;
  3881.   font-weight: bold;
  3882.   background: #0005;
  3883.   color: white;
  3884.   padding: 4px 10px;
  3885.   text-shadow: .5px .5px 2px #000;
  3886.   transition: opacity 1s ease .25s;
  3887.   opacity: 0;
  3888. }
  3889. #\mpiv-bar[data-force] {
  3890.   transition: none;
  3891. }
  3892. #\mpiv-bar.\mpiv-show {
  3893.   opacity: 1;
  3894. }
  3895. #\mpiv-bar[data-zoom]:not(:empty)::after {
  3896.   content: " (" attr(data-zoom) ")";
  3897.   opacity: .8;
  3898. }
  3899. #\mpiv-bar[data-zoom]:empty::after {
  3900.   content: attr(data-zoom);
  3901. }
  3902. #\mpiv-popup.\mpiv-show {
  3903.   display: inline;
  3904. }
  3905. #\mpiv-popup {
  3906.   display: none;
  3907.   cursor: none;
  3908. ${cfg.uiFadein ? String.raw`
  3909.   animation: .2s \mpiv-fadein both;
  3910.   transition: box-shadow .25s, background-color .25s;
  3911.   ` : ''}
  3912. ${App.popupStyleBase = `
  3913.   border: none;
  3914.   box-sizing: border-box;
  3915.   background-size: cover;
  3916.   position: fixed;
  3917.   z-index: 2147483647;
  3918.   padding: 0;
  3919.   margin: 0;
  3920.   top: 0;
  3921.   left: 0;
  3922.   width: auto;
  3923.   height: auto;
  3924.   transform-origin: center;
  3925.   max-width: none;
  3926.   max-height: none;
  3927. `}
  3928. }
  3929. #\mpiv-popup.\mpiv-show {
  3930.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3931.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3932.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3933.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3934. }
  3935. #\mpiv-popup.\mpiv-show[loaded] {
  3936.   background-color: ${Util.color('Background')};
  3937.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3938. }
  3939. #\mpiv-popup[data-gallery-flip] {
  3940.   animation: none;
  3941.   transition: none;
  3942. }
  3943. #\mpiv-popup[${NOAA_ATTR}],
  3944. #\mpiv-popup.\mpiv-zoom-max {
  3945.   image-rendering: pixelated;
  3946. }
  3947. #\mpiv-popup.\mpiv-night:not(#\\0) {
  3948.   box-shadow: 0 0 0 9999px #000;
  3949. }
  3950. body:has(#\mpiv-popup.\mpiv-night)::-webkit-scrollbar {
  3951.   background: #000;
  3952. }
  3953. #\mpiv-setup {
  3954. }
  3955. @keyframes \mpiv-fadein {
  3956.   from {
  3957.     opacity: 0;
  3958.     border-color: transparent;
  3959.   }
  3960.   to {
  3961.     opacity: 1;
  3962.   }
  3963. }
  3964. ` + (cfg.globalStatus ? String.raw`
  3965. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3966.   cursor: progress !important;
  3967. }
  3968. :root.\mpiv-edge #\mpiv-popup {
  3969.   cursor: default;
  3970. }
  3971. :root.\mpiv-error *:hover {
  3972.   cursor: not-allowed !important;
  3973. }
  3974. :root.\mpiv-ready *:hover,
  3975. :root.\mpiv-large *:hover {
  3976.   cursor: zoom-in !important;
  3977. }
  3978. :root.\mpiv-shift *:hover {
  3979.   cursor: default !important;
  3980. }
  3981. ` : String.raw`
  3982. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3983.   cursor: progress;
  3984. }
  3985. [\mpiv-status~="edge"]:hover {
  3986.   cursor: default;
  3987. }
  3988. [\mpiv-status~="error"]:hover {
  3989.   cursor: not-allowed;
  3990. }
  3991. [\mpiv-status~="ready"]:hover,
  3992. [\mpiv-status~="large"]:hover {
  3993.   cursor: zoom-in;
  3994. }
  3995. [\mpiv-status~="shift"]:hover {
  3996.   cursor: default;
  3997. }
  3998. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3999.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  4000.   return App.globalStyle;
  4001. }
  4002.  
  4003. //#region Global utilities
  4004.  
  4005. const clamp = (v, min, max) =>
  4006.   v < min ? min : v > max ? max : v;
  4007.  
  4008. const compareNumbers = (a, b) =>
  4009.   a - b;
  4010.  
  4011. const flattenHtml = str =>
  4012.   str.trim().replace(/\n\s*/g, '');
  4013.  
  4014. const dropEvent = e =>
  4015.   (e.preventDefault(), e.stopPropagation());
  4016.  
  4017. const ensureArray = v =>
  4018.   isArray(v) ? v : [v];
  4019.  
  4020. /** @param {KeyboardEvent} e */
  4021. const eventModifiers = e =>
  4022.   (e.altKey ? '!' : '') +
  4023.   (e.ctrlKey ? '^' : '') +
  4024.   (e.metaKey ? '#' : '') +
  4025.   (e.shiftKey ? '+' : '');
  4026.  
  4027. /** @param {KeyboardEvent} e */
  4028. const describeKey = e => eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  4029.  
  4030. const isFunction = val => typeof val === 'function';
  4031.  
  4032. const isVideo = el => el && el.tagName === 'VIDEO';
  4033.  
  4034. const now = performance.now.bind(performance);
  4035.  
  4036. const sumProps = (...props) => {
  4037.   let sum = 0;
  4038.   for (const p of props)
  4039.     sum += parseFloat(p) || 0;
  4040.   return sum;
  4041. };
  4042.  
  4043. const tryCatch = (fn, ...args) => {
  4044.   try {
  4045.     return fn(...args);
  4046.   } catch (e) {}
  4047. };
  4048.  
  4049. const tryJSON = str =>
  4050.   tryCatch(JSON.parse, str);
  4051.  
  4052. const pick = (obj, path, fn) => {
  4053.   if (obj && path)
  4054.     for (const p of path.split('.'))
  4055.       if (obj) obj = obj[p]; else break;
  4056.   return fn && obj !== undefined ? fn(obj) : obj;
  4057. };
  4058.  
  4059. const $ = (sel, node = doc) =>
  4060.   node.querySelector(sel) || false;
  4061.  
  4062. const $$ = (sel, node = doc) =>
  4063.   node.querySelectorAll(sel);
  4064.  
  4065. const $new = (sel, props, children) => {
  4066.   if (typeof sel !== 'string') {
  4067.     children = props;
  4068.     props = sel;
  4069.     sel = '';
  4070.   }
  4071.   if (!children && props != null && ({}).toString.call(props) !== '[object Object]') {
  4072.     children = props;
  4073.     props = null;
  4074.   }
  4075.   const isFrag = sel === 'fragment';
  4076.   const [, tag, id, cls] = sel.match(/^(\w*)(?:#([^.]+))?(?:\.(.+))?$/);
  4077.   const el = isFrag ? doc.createDocumentFragment() : doc.createElement(tag || 'div');
  4078.   if (id) el.id = id;
  4079.   if (cls) el.className = cls.replace(/\./g, ' ');
  4080.   if (props) {
  4081.     for (const [k, v] of Object.entries(props)) {
  4082.       if (!k.startsWith('data-')) {
  4083.         el[k] = v;
  4084.       } else if (v != null) {
  4085.         el.setAttribute(k, v);
  4086.       }
  4087.     }
  4088.   }
  4089.   if (children != null) {
  4090.     if (isArray(children))
  4091.       el.append(...children.filter(Boolean));
  4092.     else if (children instanceof Node)
  4093.       el.appendChild(children);
  4094.     else
  4095.       el.textContent = children;
  4096.   }
  4097.   return el;
  4098. };
  4099.  
  4100. const $css = (el, props) =>
  4101.   Object.entries(props).forEach(([k, v]) =>
  4102.     el.style.setProperty(k, v, 'important'));
  4103.  
  4104. const $parseHtml = str =>
  4105.   new DOMParser().parseFromString(str, 'text/html');
  4106.  
  4107. const $many = (q, doc) => {
  4108.   for (const selector of ensureArray(q)) {
  4109.     const el = selector && $(selector, doc);
  4110.     if (el)
  4111.       return el;
  4112.   }
  4113. };
  4114.  
  4115. const $prop = (sel, prop, node = doc) =>
  4116.   (node = $(sel, node)) && node[prop] || '';
  4117.  
  4118. const $propUp = (node, prop) =>
  4119.   (node = node.closest(`[${prop}]`)) &&
  4120.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  4121.   '';
  4122.  
  4123. const $remove = node =>
  4124.   node && node.remove();
  4125.  
  4126. const $dataset = ({dataset: d}, key, val) =>
  4127.   val == null ? delete d[key] : (d[key] = val);
  4128.  
  4129. //#endregion
  4130. //#region Init
  4131.  
  4132. (async () => {
  4133.   cfg = await Config.load({save: true});
  4134.   if (!doc.body) {
  4135.     await new Promise(resolve =>
  4136.       new MutationObserver((_, mo) => doc.body && (mo.disconnect(), resolve()))
  4137.         .observe(document, {subtree: true, childList: true}));
  4138.   }
  4139.   const el = doc.body.firstElementChild;
  4140.   if (el) {
  4141.     App.isImageTab = el === doc.body.lastElementChild && el.matches('img, video');
  4142.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  4143.   }
  4144.   if (Menu) Menu.register();
  4145.   addEventListener('mouseover', Events.onMouseOver, true);
  4146.   addEventListener('contextmenu', Events.onContext, true);
  4147.   addEventListener('keydown', Events.onKeyDown, true);
  4148.   addEventListener('visibilitychange', Events.onVisibility, true);
  4149.   addEventListener('blur', Events.onVisibility, true);
  4150.   if (['greasyfork.org', 'github.com'].includes(hostname))
  4151.     addEventListener('click', setupClickedRule, true);
  4152.   addEventListener('message', App.onMessage, true);
  4153. })();
  4154.  
  4155. if (window.trustedTypes) {
  4156.   const TT = window.trustedTypes;
  4157.   const CP = 'createPolicy';
  4158.   const createPolicy = TT[CP];
  4159.   TT[CP] = function ovr(name, opts) {
  4160.     let fn;
  4161.     const p = createPolicy.call(TT, name, opts);
  4162.     if ((trustedHTML || opts[fn = 'createHTML'] && (trustedHTML = p[fn].bind(p))) &&
  4163.         (trustedScript || opts[fn = 'createScript'] && (trustedScript = p[fn].bind(p))) &&
  4164.         TT[CP] === ovr)
  4165.       TT[CP] = createPolicy;
  4166.     return p;
  4167.   };
  4168. }
  4169.  
  4170. //#endregion