☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

目前为 2020-08-29 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. // @connect     *
  8. //
  9. // allow rule installer in config dialog https://w9p.co/userscripts/mpiv/more_host_rules.html
  10. // @connect     w9p.co
  11. //
  12. // @grant       GM_getValue
  13. // @grant       GM_setValue
  14. // @grant       GM_xmlhttpRequest
  15. // @grant       GM_download
  16. // @grant       GM_openInTab
  17. // @grant       GM_registerMenuCommand
  18. // @grant       GM_setClipboard
  19. //
  20. // @version     1.1.17
  21. // @author      tophf
  22. //
  23. // @original-version 2017.9.29
  24. // @original-author  kuehlschrank
  25. //
  26. // @supportURL  https://github.com/tophf/mpiv/issues
  27. // @homepage    https://w9p.co/userscripts/mpiv/
  28. // @icon        https://w9p.co/userscripts/mpiv/icon.png
  29. // ==/UserScript==
  30.  
  31. 'use strict';
  32.  
  33. //#region Globals
  34.  
  35. /** @type mpiv.Config */
  36. let cfg;
  37. /** @type mpiv.AppInfo */
  38. let ai = {rule: {}};
  39. /** @type Element */
  40. let elConfig;
  41.  
  42. const doc = document;
  43. const hostname = location.hostname;
  44. const dotDomain = '.' + hostname;
  45. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  46. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  47. const isFF = CSS.supports('-moz-appearance', 'none');
  48. const AudioContext = window.AudioContext || function () {};
  49.  
  50. const PREFIX = 'mpiv-';
  51. const STATUS_ATTR = `${PREFIX}status`;
  52. const MSG = Object.assign({}, ...[
  53.   'getViewSize',
  54.   'viewSize',
  55. ].map(k => ({[k]: `${PREFIX}${k}`})));
  56. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  57. // time for volatile things to settle down meanwhile we postpone action
  58. // examples: loading image from cache, quickly moving mouse over one element to another
  59. const SETTLE_TIME = 50;
  60. // used to detect JS code in host rules
  61. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  62. const RX_MEDIA_URL = /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i;
  63. const ZOOM_MAX = 16;
  64. const SYM_U = Symbol('u');
  65.  
  66. //#endregion
  67.  
  68. const App = {
  69.  
  70.   isEnabled: true,
  71.   isImageTab: false,
  72.   globalStyle: '',
  73.   popupStyleBase: '',
  74.  
  75.   activate(info, event) {
  76.     const {match, node, rule, url} = info;
  77.     if (elConfig) console.info({node, rule, url, match});
  78.     if (ai.node) App.deactivate();
  79.     ai = info;
  80.     ai.force = event.ctrlKey;
  81.     ai.gNum = 0;
  82.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  83.     Util.suppressTooltip();
  84.     Calc.updateViewSize();
  85.     Events.toggle(true);
  86.     Events.trackMouse(event);
  87.     if (CspSniffer.init && location.protocol === 'https:')
  88.       CspSniffer.init();
  89.     if (ai.force) {
  90.       App.start();
  91.     } else if (cfg.start === 'auto' && !rule.manual) {
  92.       App.belate();
  93.     } else {
  94.       Status.set('ready');
  95.     }
  96.   },
  97.  
  98.   belate() {
  99.     if (cfg.preload) {
  100.       ai.preloadStart = now();
  101.       App.start();
  102.       Status.set('+preloading');
  103.       setTimeout(Status.set, cfg.delay, '-preloading');
  104.     } else {
  105.       ai.timer = setTimeout(App.start, cfg.delay);
  106.     }
  107.   },
  108.  
  109.   checkImageTab() {
  110.     const el = doc.body.firstElementChild;
  111.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  112.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  113.   },
  114.  
  115.   checkProgress({start} = {}) {
  116.     const p = ai.popup;
  117.     if (!p)
  118.       return;
  119.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  120.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  121.     if (h)
  122.       return App.canCommit(w, h);
  123.     if (start) {
  124.       clearInterval(ai.timerProgress);
  125.       ai.timerProgress = setInterval(App.checkProgress, 150);
  126.     }
  127.   },
  128.  
  129.   canCommit(w, h) {
  130.     if (!ai.force && ai.rect && !ai.gItems &&
  131.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  132.       App.deactivate();
  133.       return false;
  134.     }
  135.     App.stopTimers();
  136.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  137.     if (wait > 0) {
  138.       ai.timer = setTimeout(App.checkProgress, wait);
  139.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  140.       App.handleError({type: 'error'});
  141.     } else {
  142.       App.commit();
  143.     }
  144.     return true;
  145.   },
  146.  
  147.   async commit() {
  148.     const p = ai.popup;
  149.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  150.     if (isDecoded) {
  151.       await p.decode();
  152.       if (p !== ai.popup)
  153.         return;
  154.     }
  155.     App.updateStyles();
  156.     Calc.measurePopup();
  157.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  158.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  159.     if (willMove)
  160.       Popup.move();
  161.     Bar.updateName();
  162.     Bar.updateDetails();
  163.     Status.set(!ai.popupLoaded && 'loading');
  164.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  165.                ai.nheight > p.clientHeight + ai.extras.h;
  166.     if (ai.large) {
  167.       Status.set('+large');
  168.       // prevent a blank bg+border in FF
  169.       if (isFF && p.complete && !isDecoded)
  170.         p.style.backgroundImage = `url('${p.src}')`;
  171.     }
  172.   },
  173.  
  174.   deactivate({wait} = {}) {
  175.     App.stopTimers();
  176.     if (ai.req)
  177.       tryCatch.call(ai.req, ai.req.abort);
  178.     if (ai.tooltip)
  179.       ai.tooltip.node.title = ai.tooltip.text;
  180.     Status.set(false);
  181.     Bar.set(false);
  182.     Events.toggle(false);
  183.     Popup.destroy();
  184.     if (wait) {
  185.       App.isEnabled = false;
  186.       setTimeout(App.enable, 200);
  187.     }
  188.     ai = {rule: {}};
  189.   },
  190.  
  191.   enable() {
  192.     App.isEnabled = true;
  193.   },
  194.  
  195.   handleError(e, rule = ai.rule) {
  196.     if (rule && rule.onerror === 'skip')
  197.       return;
  198.     const fe = Util.formatError(e, rule);
  199.     if (!rule || !ai.urls || !ai.urls.length)
  200.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  201.     if (ai.urls && ai.urls.length) {
  202.       ai.url = ai.urls.shift();
  203.       if (ai.url) {
  204.         App.stopTimers();
  205.         App.startSingle();
  206.       } else {
  207.         App.deactivate();
  208.       }
  209.     } else if (ai.node) {
  210.       Status.set('error');
  211.       Bar.set(fe.message, 'error');
  212.     }
  213.   },
  214.  
  215.   /** @param {MessageEvent} e */
  216.   onMessage(e) {
  217.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  218.       for (const el of doc.getElementsByTagName('iframe')) {
  219.         if (el.contentWindow === e.source) {
  220.           const [w, h] = Calc.frameSize(el, window);
  221.           e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  222.           return;
  223.         }
  224.       }
  225.     }
  226.   },
  227.  
  228.   /** @param {MessageEvent} e */
  229.   onMessageChild(e) {
  230.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  231.       window.removeEventListener('message', App.onMessageChild);
  232.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  233.       if (w && h) ai.view = {w, h};
  234.     }
  235.   },
  236.  
  237.   start() {
  238.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  239.     if (!Util.isHovered(ai.node)) {
  240.       App.deactivate();
  241.       return;
  242.     }
  243.     App.updateStyles();
  244.     if (ai.gallery)
  245.       App.startGallery();
  246.     else
  247.       App.startSingle();
  248.   },
  249.  
  250.   startSingle() {
  251.     Status.loading();
  252.     ai.imageUrl = null;
  253.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  254.       Remoting.findRedirect();
  255.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  256.       App.startFromQ();
  257.     } else {
  258.       Popup.create(ai.url);
  259.       Ruler.runC();
  260.     }
  261.   },
  262.  
  263.   async startFromQ() {
  264.     try {
  265.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  266.       const url = Ruler.runQ(responseText, doc, finalUrl);
  267.       if (!url)
  268.         throw 'The "q" rule did not produce any URL.';
  269.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  270.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  271.         if (!info || !info.url)
  272.           throw `Couldn't follow URL: ${url}`;
  273.         Object.assign(ai, info);
  274.         App.startSingle();
  275.       } else {
  276.         Popup.create(url, finalUrl);
  277.         Ruler.runC(responseText, doc);
  278.       }
  279.     } catch (e) {
  280.       App.handleError(e);
  281.     }
  282.   },
  283.  
  284.   async startGallery() {
  285.     Status.loading();
  286.     try {
  287.       const startUrl = ai.url;
  288.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  289.       const items = await new Promise(resolve => {
  290.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  291.           resolve);
  292.         if (Array.isArray(it))
  293.           resolve(it);
  294.       });
  295.       // bail out if the gallery's async callback took too long
  296.       if (ai.url !== startUrl) return;
  297.       ai.gNum = items.length;
  298.       ai.gItems = items.length && items;
  299.       if (ai.gItems) {
  300.         const i = items.index;
  301.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  302.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  303.             Gallery.findIndex(ai.url);
  304.         setTimeout(Gallery.next);
  305.       } else {
  306.         throw 'Empty gallery';
  307.       }
  308.     } catch (e) {
  309.       App.handleError(e);
  310.     }
  311.   },
  312.  
  313.   stopTimers() {
  314.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  315.       clearTimeout(ai[timer]);
  316.     clearInterval(ai.timerProgress);
  317.   },
  318.  
  319.   toggleZoom({keepScale} = {}) {
  320.     const p = ai.popup;
  321.     if (!p || !ai.scales || ai.scales.length < 2)
  322.       return;
  323.     ai.zoomed = !ai.zoomed;
  324.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  325.     if (ai.zooming)
  326.       p.classList.add(`${PREFIX}zooming`);
  327.     Popup.move();
  328.     Bar.updateDetails();
  329.     Status.set(ai.zoomed ? 'zoom' : false);
  330.     return ai.zoomed;
  331.   },
  332.  
  333.   updateStyles() {
  334.     Util.addStyle('global',
  335.       (App.globalStyle || createGlobalStyle()) +
  336.       (cfg.css.includes('{') ? cfg.css : `#${PREFIX}-popup {${(cfg.css)}}`));
  337.     Util.addStyle('rule', ai.rule.css || '');
  338.   },
  339. };
  340.  
  341. const Bar = {
  342.  
  343.   set(label, className) {
  344.     let b = ai.bar;
  345.     if (typeof label !== 'string') {
  346.       $remove(b);
  347.       ai.bar = null;
  348.       return;
  349.     }
  350.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  351.     App.updateStyles();
  352.     Bar.updateDetails();
  353.     Bar.show();
  354.     b.innerHTML = label;
  355.     if (!b.parentNode) {
  356.       doc.body.appendChild(b);
  357.       Util.forceLayout(b);
  358.     }
  359.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  360.   },
  361.  
  362.   show() {
  363.     clearTimeout(ai.timerBar);
  364.     ai.bar.style.removeProperty('opacity');
  365.     ai.timerBar = setTimeout(() => ai.bar && $css(ai.bar, {opacity: 0}), 3000);
  366.   },
  367.  
  368.   updateName() {
  369.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  370.     if (gi) {
  371.       const item = gi[i];
  372.       const noDesc = !gi.some(_ => _.desc);
  373.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  374.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  375.         item.desc,
  376.       ].filter(Boolean).join(' - ')}`;
  377.       Bar.set(c.trim() || ' ', 'gallery', true);
  378.     } else if ('caption' in ai) {
  379.       Bar.set(ai.caption, 'caption');
  380.     } else if (ai.tooltip) {
  381.       Bar.set(ai.tooltip.text, 'tooltip');
  382.     } else {
  383.       Bar.set(' ', 'info');
  384.     }
  385.   },
  386.  
  387.   updateDetails() {
  388.     if (!ai.bar) return;
  389.     const r = ai.rotate;
  390.     const zoom = ai.nwidth && `${
  391.       Math.round(ai.scale * 100)
  392.     }%${
  393.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  394.     }${
  395.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  396.     }, ${
  397.       ai.nwidth
  398.     } x ${
  399.       ai.nheight
  400.     } px, ${
  401.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  402.     } MP`.replace(/\x20/g, '\xA0');
  403.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  404.       if (zoom) ai.bar.dataset.zoom = zoom;
  405.       else delete ai.bar.dataset.zoom;
  406.       Bar.show();
  407.     }
  408.   },
  409. };
  410.  
  411. const Calc = {
  412.  
  413.   frameSize(elFrame, parentWindow) {
  414.     if (!elFrame) return;
  415.     const r = elFrame.getBoundingClientRect();
  416.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  417.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  418.     return [w, h];
  419.   },
  420.  
  421.   generateScales(fit) {
  422.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  423.     const zoomStep = cfg.zoomStep / 100;
  424.     const arr = [scale];
  425.     if (fit !== 1) {
  426.       const diff = goal / scale;
  427.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  428.       const step = steps && Math.pow(diff, 1 / steps);
  429.       for (let i = steps; --i > 0;)
  430.         arr.push((scale *= step));
  431.       arr.push(scale = goal);
  432.     }
  433.     while ((scale *= zoomStep) <= ZOOM_MAX)
  434.       arr.push(scale);
  435.     return arr;
  436.   },
  437.  
  438.   measurePopup() {
  439.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  440.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  441.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  442.     if (p.clientWidth > nw) {
  443.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  444.       nh = ai.nheight = w / nw * nh | 0;
  445.       nw = ai.nwidth = w;
  446.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  447.     }
  448.     p.className = `${PREFIX}show`;
  449.     p.removeAttribute('style');
  450.     const s = getComputedStyle(p);
  451.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  452.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  453.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  454.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  455.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  456.     ai.extras = {
  457.       inw, inh,
  458.       outw, outh,
  459.       o: o2 / 2,
  460.       w: inw + outw,
  461.       h: inh + outh,
  462.     };
  463.     const fit = Math.min(
  464.       (ai.view.w - ai.extras.w) / ai.nwidth,
  465.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  466.     const isCustom = !cfg.fit && cfg.scales.length;
  467.     let cutoff = Math.min(1, fit);
  468.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  469.     if (isCustom) {
  470.       const dst = [];
  471.       for (const scale of cfg.scales) {
  472.         const val = parseFloat(scale) || fit;
  473.         dst.push(val);
  474.         if (isCustom && typeof scale === 'string') {
  475.           if (scale.includes('!')) cutoff = val;
  476.           if (scale.includes('*')) scaleZoom = val;
  477.         }
  478.       }
  479.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  480.     } else {
  481.       ai.scales = Calc.generateScales(fit);
  482.     }
  483.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  484.     ai.scaleFit = fit;
  485.     ai.scaleZoom = scaleZoom;
  486.   },
  487.  
  488.   rect() {
  489.     let {node, rule} = ai;
  490.     let n = rule.rect && node.closest(rule.rect);
  491.     if (n) return n.getBoundingClientRect();
  492.     const nested = node.getElementsByTagName('*');
  493.     let maxArea = 0;
  494.     let maxBounds;
  495.     n = node;
  496.     for (let i = 0; n; n = nested[i++]) {
  497.       const bounds = n.getBoundingClientRect();
  498.       const area = bounds.width * bounds.height;
  499.       if (area > maxArea) {
  500.         maxArea = area;
  501.         maxBounds = bounds;
  502.         node = n;
  503.       }
  504.     }
  505.     return maxBounds;
  506.   },
  507.  
  508.   scaleBiggerThan(scale, i, arr) {
  509.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  510.   },
  511.  
  512.   scaleIndex(dir) {
  513.     const i = ai.scales.indexOf(ai.scale);
  514.     if (i >= 0) return i + dir;
  515.     for (
  516.       let len = ai.scales.length,
  517.         i = dir > 0 ? 0 : len - 1;
  518.       i >= 0 && i < len;
  519.       i += dir
  520.     ) {
  521.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  522.         return i;
  523.     }
  524.     return -1;
  525.   },
  526.  
  527.   scaleForFirstZoom(keepScale) {
  528.     const z = ai.scaleZoom;
  529.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  530.   },
  531.  
  532.   updateViewSize() {
  533.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  534.     ai.view = {
  535.       w: view.clientWidth,
  536.       h: view.clientHeight,
  537.     };
  538.     if (window === top) return;
  539.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  540.     if (w && h) {
  541.       ai.view = {w, h};
  542.     } else {
  543.       window.addEventListener('message', App.onMessageChild);
  544.       parent.postMessage(MSG.getViewSize, '*');
  545.     }
  546.   },
  547. };
  548.  
  549. class Config {
  550.  
  551.   constructor({data: c = GM_getValue('cfg'), save}) {
  552.     if (typeof c === 'string')
  553.       c = tryCatch(JSON.parse, c);
  554.     if (typeof c !== 'object' || !c)
  555.       c = {};
  556.     const {/** @type mpiv.Config */ DEFAULTS} = Config;
  557.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  558.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  559.         '';
  560.     if (c.version !== DEFAULTS.version) {
  561.       if (typeof c.hosts === 'string')
  562.         c.hosts = c.hosts.split('\n')
  563.           .map(s => tryCatch(JSON.parse, s) || s)
  564.           .filter(Boolean);
  565.       if (c.close === true || c.close === false)
  566.         c.zoomOut = c.close ? 'auto' : 'stay';
  567.       for (const key in DEFAULTS)
  568.         if (typeof c[key] !== typeof DEFAULTS[key])
  569.           c[key] = DEFAULTS[key];
  570.       if (c.version === 3 && c.scales[0] === 0)
  571.         c.scales[0] = '0!';
  572.       for (const key in c)
  573.         if (!(key in DEFAULTS))
  574.           delete c[key];
  575.       c.version = DEFAULTS.version;
  576.       if (save)
  577.         GM_setValue('cfg', c);
  578.     }
  579.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  580.       App.globalStyle = '';
  581.     if (!Array.isArray(c.scales))
  582.       c.scales = [];
  583.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  584.     Object.assign(this, DEFAULTS, c);
  585.   }
  586. }
  587.  
  588. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  589.   center: false,
  590.   css: '',
  591.   delay: 500,
  592.   fit: '',
  593.   globalStatus: false,
  594.   // prefer ' inside rules because " will be displayed as \"
  595.   // example: "img[src*='icon']"
  596.   hosts: [{
  597.     name: 'No popup for YouTube thumbnails',
  598.     d: 'www.youtube.com',
  599.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  600.     s: '',
  601.   }, {
  602.     name: 'No popup for SVG/PNG icons',
  603.     d: '',
  604.     e: "img[src*='icon']",
  605.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  606.     s: '',
  607.   }],
  608.   imgtab: false,
  609.   mute: false,
  610.   preload: false,
  611.   scale: 1.25,
  612.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  613.   start: 'auto',
  614.   uiBackgroundColor: '#ffffff',
  615.   uiBackgroundOpacity: 100,
  616.   uiBorderColor: '#000000',
  617.   uiBorderOpacity: 100,
  618.   uiBorder: 0,
  619.   uiFadein: true,
  620.   uiShadowColor: '#000000',
  621.   uiShadowOpacity: 80,
  622.   uiShadow: 20,
  623.   uiPadding: 0,
  624.   uiMargin: 0,
  625.   version: 6,
  626.   waitLoad: false,
  627.   xhr: true,
  628.   zoom: 'context',
  629.   zoomOut: 'auto',
  630.   zoomStep: 133,
  631. });
  632.  
  633. const CspSniffer = {
  634.  
  635.   /** @type {?Object<string,string[]>} */
  636.   csp: null,
  637.   /** @type {?Promise<void>} */
  638.   initPending: null,
  639.   selfUrl: location.origin + '/',
  640.  
  641.   // will be null when done
  642.   init() {
  643.     this.initPending = this.initPending || new Promise(resolve => {
  644.       GM_xmlhttpRequest({
  645.         url: location.href,
  646.         method: 'HEAD',
  647.         onload: response => {
  648.           this.csp = this._parse(response);
  649.           this.init = this.initPending = null;
  650.           resolve();
  651.         },
  652.       });
  653.     });
  654.   },
  655.  
  656.   async check(url) {
  657.     await this.initPending;
  658.     const isVideo = Util.isVideoUrl(url);
  659.     let mode;
  660.     if (this.csp) {
  661.       const src = this.csp[isVideo ? 'media' : 'img'];
  662.       if (!src.some(this._srcMatches, url))
  663.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  664.     }
  665.     return [mode || ai.xhr, isVideo];
  666.   },
  667.  
  668.   _parse({responseHeaders}) {
  669.     const csp = responseHeaders.match(/(?:^|[\r\n])\s*Content-Security-Policy:([^\r\n]*)/i);
  670.     if (!csp) return;
  671.     const src = {};
  672.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  673.     for (let m; (m = rx.exec(csp[1]));)
  674.       src[m[1]] = m[2].trim().split(/\s+/);
  675.     if (!src.img) src.img = src.default || [];
  676.     if (!src.media) src.media = src.default || [];
  677.     for (const set of [src.img, src.media]) {
  678.       set.forEach((item, i) => {
  679.         if (item !== '*' && item.includes('*')) {
  680.           set[i] = new RegExp(
  681.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  682.             item
  683.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  684.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  685.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  686.             .replace(/[^/]$/, '$&/'));
  687.         }
  688.       });
  689.     }
  690.     return src;
  691.   },
  692.  
  693.   /** @this string */
  694.   _srcMatches(src) {
  695.     return src instanceof RegExp ? src.test(this) :
  696.       src === '*' ||
  697.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  698.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  699.   },
  700. };
  701.  
  702. const Events = {
  703.  
  704.   hoverData: [],
  705.   hoverTimer: 0,
  706.  
  707.   onMouseOver(e) {
  708.     let node = e.target;
  709.     if (!App.isEnabled ||
  710.         e.shiftKey ||
  711.         ai.zoomed ||
  712.         node === ai.popup ||
  713.         node === doc.body ||
  714.         node === doc.documentElement ||
  715.         node === elConfig ||
  716.         ai.gallery && ai.rectHovered)
  717.       return;
  718.     if (node.shadowRoot)
  719.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  720.     // we don't want to process everything in the path of a quickly moving mouse cursor
  721.     Events.hoverData = [now(), e, node];
  722.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  723.   },
  724.  
  725.   onMouseOverThrottled() {
  726.     const [start, e, node] = Events.hoverData;
  727.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  728.     const wait = start + SETTLE_TIME - now();
  729.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  730.     if (Events.hoverTimer || !Util.isHovered(node))
  731.       return;
  732.     if (!Ruler.rules)
  733.       Ruler.init();
  734.     let a;
  735.     const tag = node.tagName;
  736.     const src = node.currentSrc || node.src;
  737.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  738.     const info =
  739.       // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  740.       tag !== 'A' &&
  741.         RuleMatcher.find(isPic && !src.startsWith('data:') && Util.rel2abs(src), node) ||
  742.       (a = node.closest('A')) &&
  743.         RuleMatcher.findForLink(a) ||
  744.       isPic &&
  745.         {node, rule: {}, url: src};
  746.     if (info && info.url && info.node !== ai.node)
  747.       App.activate(info, e);
  748.   },
  749.  
  750.   onMouseOut(e) {
  751.     if (!e.relatedTarget && !e.shiftKey)
  752.       App.deactivate();
  753.   },
  754.  
  755.   onMouseOutShadow(e) {
  756.     const root = e.target.shadowRoot;
  757.     if (root) {
  758.       root.removeEventListener('mouseover', Events.onMouseOver);
  759.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  760.     }
  761.   },
  762.  
  763.   onMouseMove(e) {
  764.     Events.trackMouse(e);
  765.     if (e.shiftKey) {
  766.       ai.lazyUnload = true;
  767.     } else if (!ai.zoomed && !ai.rectHovered) {
  768.       App.deactivate();
  769.     } else if (ai.zoomed) {
  770.       Popup.move();
  771.       const {cx, cy, view: {w, h}} = ai;
  772.       const bx = w / 6;
  773.       const by = h / 6;
  774.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  775.       Status.set(`${onEdge ? '+' : '-'}edge`);
  776.     }
  777.   },
  778.  
  779.   onMouseDown({shiftKey, button}) {
  780.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  781.       ai.controlled = ai.zoomed = true;
  782.     } else if (button === 2 || shiftKey) {
  783.       // we ignore RMB and Shift
  784.     } else {
  785.       App.deactivate({wait: true});
  786.       doc.addEventListener('mouseup', App.enable, {once: true});
  787.     }
  788.   },
  789.  
  790.   onMouseScroll(e) {
  791.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  792.     if (ai.zoomed) {
  793.       Events.zoomInOut(dir);
  794.     } else if (ai.gNum > 1 && ai.popup) {
  795.       Gallery.next(-dir);
  796.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  797.       App.toggleZoom();
  798.     } else {
  799.       App.deactivate();
  800.       return;
  801.     }
  802.     dropEvent(e);
  803.   },
  804.  
  805.   onKeyDown(e) {
  806.     const key = eventModifiers(e) + (e.key.length > 1 ? e.key : e.code);
  807.     const p = ai.popup;
  808.     switch (key) {
  809.       case '+Shift':
  810.         Status.set('+shift');
  811.         if (p && p.tagName === 'VIDEO')
  812.           p.controls = true;
  813.         return;
  814.       case '^Control':
  815.         if (!p && (cfg.start !== 'auto' || ai.rule.manual))
  816.           App.start();
  817.         return;
  818.       case 'ArrowRight':
  819.       case 'KeyJ':
  820.         Gallery.next(1);
  821.         break;
  822.       case 'ArrowLeft':
  823.       case 'KeyK':
  824.         Gallery.next(-1);
  825.         break;
  826.       case 'KeyD':
  827.         Remoting.saveFile();
  828.         break;
  829.       case 'KeyH': // flip horizontally
  830.       case 'KeyV': // flip vertically
  831.       case 'KeyL': // rotate left
  832.       case 'KeyR': // rotate right
  833.         if (!p)
  834.           return;
  835.         if (key === 'KeyH' || key === 'KeyV') {
  836.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  837.           ai[side] = !ai[side];
  838.         } else {
  839.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  840.         }
  841.         Bar.updateDetails();
  842.         Popup.move();
  843.         break;
  844.       case 'KeyM':
  845.         if (p && p.tagName === 'VIDEO')
  846.           p.muted = !p.muted;
  847.         break;
  848.       case 'KeyT':
  849.         ai.lazyUnload = true;
  850.         GM_openInTab(Util.tabFixUrl() || p.src);
  851.         App.deactivate();
  852.         break;
  853.       case 'Escape':
  854.         App.deactivate({wait: true});
  855.         break;
  856.       case '!Alt':
  857.         return;
  858.       default:
  859.         App.deactivate({wait: true});
  860.         return;
  861.     }
  862.     dropEvent(e);
  863.   },
  864.  
  865.   onKeyUp(e) {
  866.     if (e.key === 'Shift') {
  867.       Status.set('-shift');
  868.       if ((ai.popup || {}).controls)
  869.         ai.popup.controls = false;
  870.       if (ai.controlled)
  871.         ai.controlled = false;
  872.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  873.         App.toggleZoom();
  874.       else
  875.         App.deactivate({wait: true});
  876.     }
  877.   },
  878.  
  879.   onContext(e) {
  880.     if (e.shiftKey) return;
  881.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  882.       dropEvent(e);
  883.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  884.       App.start();
  885.       dropEvent(e);
  886.     } else {
  887.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  888.     }
  889.   },
  890.  
  891.   pierceShadow(node, x, y) {
  892.     for (let root; (root = node.shadowRoot);) {
  893.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  894.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  895.       const inner = root.elementFromPoint(x, y);
  896.       if (!inner || inner === node)
  897.         break;
  898.       node = inner;
  899.     }
  900.     return node;
  901.   },
  902.  
  903.   toggle(enable) {
  904.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  905.     const passive = enable ? {passive: true} : undefined;
  906.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  907.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  908.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  909.     onOff.call(doc, 'contextmenu', Events.onContext);
  910.     onOff.call(doc, 'keydown', Events.onKeyDown, true); // override normal page listeners
  911.     onOff.call(doc, 'keyup', Events.onKeyUp);
  912.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  913.   },
  914.  
  915.   trackMouse(e) {
  916.     const cx = ai.cx = e.clientX;
  917.     const cy = ai.cy = e.clientY;
  918.     const r = ai.rect || (ai.rect = Calc.rect());
  919.     ai.rectHovered =
  920.       cx > r.left - 2 && cx < r.right + 2 &&
  921.       cy > r.top - 2 && cy < r.bottom + 2;
  922.   },
  923.  
  924.   zoomInOut(dir) {
  925.     const i = Calc.scaleIndex(dir);
  926.     const n = ai.scales.length;
  927.     if (i >= 0 && i < n)
  928.       ai.scale = ai.scales[i];
  929.     const zo = cfg.zoomOut;
  930.     if (i <= 0 && zo !== 'stay') {
  931.       if (ai.scaleFit < ai.scale * .99) {
  932.         ai.scales.unshift(ai.scale = ai.scaleFit);
  933.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  934.         App.deactivate({wait: true});
  935.         return;
  936.       }
  937.       ai.zoomed = zo !== 'unzoom';
  938.     } else {
  939.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  940.     }
  941.     if (ai.zooming)
  942.       ai.popup.classList.add(`${PREFIX}zooming`);
  943.     Popup.move();
  944.     Bar.updateDetails();
  945.   },
  946. };
  947.  
  948. const Gallery = {
  949.  
  950.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  951.  
  952.   makeParser(g) {
  953.     return (
  954.       typeof g === 'function' ? g :
  955.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  956.           Gallery.defaultParser
  957.     );
  958.   },
  959.  
  960.   findIndex(gUrl) {
  961.     const sel = gUrl.split('#')[1];
  962.     if (!sel)
  963.       return 0;
  964.     if (/^\d+$/.test(sel))
  965.       return parseInt(sel);
  966.     for (let i = ai.gNum; i--;) {
  967.       let {url} = ai.gItems[i];
  968.       if (Array.isArray(url))
  969.         url = url[0];
  970.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  971.         return i;
  972.     }
  973.     return 0;
  974.   },
  975.  
  976.   next(dir) {
  977.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  978.     const item = ai.gItems[ai.gIndex];
  979.     if (Array.isArray(item.url)) {
  980.       ai.urls = item.url.slice(1);
  981.       ai.url = item.url[0];
  982.     } else {
  983.       ai.urls = null;
  984.       ai.url = item.url;
  985.     }
  986.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  987.     App.startSingle();
  988.     Bar.updateName();
  989.   },
  990.  
  991.   nextIndex(dir) {
  992.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  993.   },
  994.  
  995.   defaultParser(text, doc, docUrl, m, rule) {
  996.     const {g} = rule;
  997.     const qEntry = g.entry;
  998.     const qCaption = ensureArray(g.caption);
  999.     const qImage = g.image;
  1000.     const qTitle = g.title;
  1001.     const fix =
  1002.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1003.       (s => s.trim());
  1004.     const items = [...$$(qEntry || qImage, doc)]
  1005.       .map(processEntry)
  1006.       .filter(Boolean);
  1007.     items.title = processTitle();
  1008.     items.index =
  1009.       typeof g.index === 'string' &&
  1010.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1011.       RX_HAS_CODE.test(g.index) &&
  1012.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1013.       g.index;
  1014.     return items;
  1015.  
  1016.     function processEntry(entry) {
  1017.       const item = {};
  1018.       try {
  1019.         const img = qEntry ? $(qImage, entry) : entry;
  1020.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1021.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1022.       } catch (e) {}
  1023.       return item.url && item;
  1024.     }
  1025.  
  1026.     function processCaption(selector) {
  1027.       const el = $(selector, this) ||
  1028.                  $orSelf(selector, this.previousElementSibling) ||
  1029.                  $orSelf(selector, this.nextElementSibling);
  1030.       return el && fix(el.textContent);
  1031.     }
  1032.  
  1033.     function processTitle() {
  1034.       const el = $(qTitle, doc);
  1035.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1036.     }
  1037.  
  1038.     function $orSelf(selector, el) {
  1039.       if (el && !el.matches(qEntry))
  1040.         return el.matches(selector) ? el : $(selector, el);
  1041.     }
  1042.   },
  1043. };
  1044.  
  1045. const Popup = {
  1046.  
  1047.   async create(src, pageUrl) {
  1048.     Popup.destroy();
  1049.     ai.imageUrl = src;
  1050.     if (!src)
  1051.       return;
  1052.     const myAi = ai;
  1053.     let [xhr, isVideo] = await CspSniffer.check(src);
  1054.     if (ai !== myAi)
  1055.       return;
  1056.     if (xhr)
  1057.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1058.     if (ai !== myAi || !src)
  1059.       return;
  1060.     const p = ai.popup = isVideo ? PopupVideo.create() : $create('img');
  1061.     p.id = `${PREFIX}popup`;
  1062.     p.src = src;
  1063.     p.addEventListener('error', App.handleError);
  1064.     if (ai.zooming)
  1065.       p.addEventListener('transitionend', Popup.onZoom);
  1066.     doc.body.insertBefore(p, ai.bar || undefined);
  1067.     await 0;
  1068.     if (App.checkProgress({start: true}) === false)
  1069.       return;
  1070.     if (p.complete)
  1071.       Popup.onLoad.call(ai.popup);
  1072.     else if (!isVideo)
  1073.       p.addEventListener('load', Popup.onLoad, {once: true});
  1074.   },
  1075.  
  1076.   destroy() {
  1077.     const p = ai.popup;
  1078.     if (!p) return;
  1079.     p.removeEventListener('load', Popup.onLoad);
  1080.     p.removeEventListener('error', App.handleError);
  1081.     if (typeof p.pause === 'function')
  1082.       p.pause();
  1083.     if (!ai.lazyUnload) {
  1084.       if (p.src.startsWith('blob:'))
  1085.         URL.revokeObjectURL(p.src);
  1086.     }
  1087.     p.remove();
  1088.     ai.zoomed = ai.popup = ai.popupLoaded = null;
  1089.   },
  1090.  
  1091.   move() {
  1092.     let x, y;
  1093.     const {cx, cy, extras, view} = ai;
  1094.     const vw = view.w - extras.outw;
  1095.     const vh = view.h - extras.outh;
  1096.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1097.     const h0 = ai.scale * ai.nheight + extras.inh;
  1098.     const isSwapped = ai.rotate % 180;
  1099.     const w = isSwapped ? h0 : w0;
  1100.     const h = isSwapped ? w0 : h0;
  1101.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1102.       const r = ai.rect;
  1103.       const rx = (r.left + r.right) / 2;
  1104.       const ry = (r.top + r.bottom) / 2;
  1105.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1106.         if (h < vh - 60)
  1107.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1108.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1109.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1110.         if (w < vw - 60)
  1111.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1112.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1113.       }
  1114.     }
  1115.     if (x == null)
  1116.       x = (vw - w) * (vw > w ? .5 : clamp(5 / 3 * (cx / vw - .2), 0, 1));
  1117.     if (y == null)
  1118.       y = (vh - h) * (vh > h ? .5 : clamp(5 / 3 * (cy / vh - .2), 0, 1));
  1119.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1120.     x += extras.o - diff;
  1121.     y += extras.o + diff;
  1122.     $css(ai.popup, {
  1123.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1124.                  `rotate(${ai.rotate || 0}deg) ` +
  1125.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1126.       width: `${Math.round(w0)}px`,
  1127.       height: `${Math.round(h0)}px`,
  1128.     });
  1129.   },
  1130.  
  1131.   onLoad() {
  1132.     if (this === ai.popup) {
  1133.       this.setAttribute('loaded', '');
  1134.       ai.popupLoaded = true;
  1135.       Status.set('-loading');
  1136.       if (ai.preloadUrl) {
  1137.         $create('img', {src: ai.preloadUrl});
  1138.         ai.preloadUrl = null;
  1139.       }
  1140.     }
  1141.   },
  1142.  
  1143.   onZoom() {
  1144.     this.classList.remove(`${PREFIX}zooming`);
  1145.   },
  1146. };
  1147.  
  1148. const PopupVideo = {
  1149.   create() {
  1150.     ai.bufBar = false;
  1151.     ai.bufStart = now();
  1152.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1153.     return $create('video', {
  1154.       autoplay: true,
  1155.       controls: shouldMute,
  1156.       muted: shouldMute,
  1157.       loop: true,
  1158.       volume: clamp(+GM_getValue('volume') || .5, 0, 1),
  1159.       onprogress: PopupVideo.progress,
  1160.       oncanplaythrough: PopupVideo.progressDone,
  1161.       onvolumechange: PopupVideo.rememberVolume,
  1162.     });
  1163.   },
  1164.  
  1165.   progress() {
  1166.     const {duration} = this;
  1167.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1168.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1169.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1170.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1171.     }
  1172.   },
  1173.  
  1174.   progressDone() {
  1175.     this.onprogress = this.oncanplaythrough = null;
  1176.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1177.       Bar.set(false);
  1178.     Popup.onLoad.call(this);
  1179.   },
  1180.  
  1181.   rememberVolume() {
  1182.     GM_setValue('volume', this.volume);
  1183.   },
  1184. };
  1185.  
  1186. const Ruler = {
  1187. /*
  1188.  'u' works only with URLs so it's ignored if 'html' is true
  1189.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1190.    |foo = url or text must start with foo
  1191.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1192.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1193.  'r' is checked only if 'u' matches first
  1194. */
  1195.   init() {
  1196.     const errors = new Map();
  1197.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1198.     for (const rule of errors.keys())
  1199.       App.handleError('Invalid custom host rule:', rule);
  1200.  
  1201.     // rules that disable previewing
  1202.     const disablers = [
  1203.       dotDomain.endsWith('.stackoverflow.com') && {
  1204.         e: '.post-tag, .post-tag img',
  1205.         s: '',
  1206.       },
  1207.       {
  1208.         u: '||disqus.com/',
  1209.         s: '',
  1210.       },
  1211.     ];
  1212.  
  1213.     // optimization: a rule is created only when on domain
  1214.     const perDomain = [
  1215.       hostname.includes('startpage') && {
  1216.         r: /\boiu=(.+)/,
  1217.         s: '$1',
  1218.         follow: true,
  1219.       },
  1220.       dotDomain.endsWith('.4chan.org') && {
  1221.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1222.         q: '.op .fileText a',
  1223.         css: '#post-preview{display:none}',
  1224.       },
  1225.       hostname.includes('amazon.') && {
  1226.         r: /.+?images\/I\/.+?\./,
  1227.         s: m => {
  1228.           const uh = doc.getElementById('universal-hover');
  1229.           return uh ? '' : m[0] + 'jpg';
  1230.         },
  1231.         css: '#zoomWindow{display:none!important;}',
  1232.       },
  1233.       dotDomain.endsWith('.bing.com') && {
  1234.         e: 'a[m*="murl"]',
  1235.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1236.         s: '$1',
  1237.         html: true,
  1238.       },
  1239.       ...dotDomain.endsWith('.deviantart.com') && [{
  1240.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1241.         s: (m, node) =>
  1242.           $propUp(node, 'data-super-full-img') ||
  1243.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1244.           node.dataset.embedId && node.src,
  1245.       }, {
  1246.         e: '.dev-view-deviation img',
  1247.         s: () => [
  1248.           $('.dev-page-download').href,
  1249.           $('.dev-content-full').src,
  1250.         ].filter(Boolean),
  1251.       }, {
  1252.         e: 'a[data-hook=deviation_link]',
  1253.         q: 'link[as=image]',
  1254.       }] || [],
  1255.       dotDomain.endsWith('.dropbox.com') && {
  1256.         r: /(.+?&size_mode)=\d+(.*)/,
  1257.         s: '$1=5$2',
  1258.       },
  1259.       dotDomain.endsWith('.facebook.com') && {
  1260.         e: 'a[href*="ref=hovercard"]',
  1261.         s: (m, node) =>
  1262.           'https://www.facebook.com/photo.php?fbid=' +
  1263.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1264.         follow: true,
  1265.       },
  1266.       dotDomain.endsWith('.facebook.com') && {
  1267.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1268.         s: (m, node) =>
  1269.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1270.             decodeURIComponent(m[4]),
  1271.         html: true,
  1272.         follow: true,
  1273.       },
  1274.       dotDomain.endsWith('.flickr.com') &&
  1275.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1276.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1277.         s: m => `https://www.flickr.com/services/rest/?${
  1278.           new URLSearchParams({
  1279.             photo_id: m[1],
  1280.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1281.             method: 'flickr.photos.getSizes',
  1282.             format: 'json',
  1283.             nojsoncallback: 1,
  1284.           }).toString()}`,
  1285.         q: text => JSON.parse(text).sizes.size.pop().source,
  1286.       },
  1287.       dotDomain.endsWith('.github.com') && {
  1288.         r: new RegExp([
  1289.           /(avatars.+?&s=)\d+/,
  1290.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1291.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1292.         ].map(rx => rx.source).join('|')),
  1293.         s: m => `https://${
  1294.           m[1] ? `${m[1]}460` :
  1295.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1296.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1297.         }`,
  1298.       },
  1299.       isGoogleImages && {
  1300.         e: 'a[href*="imgres?imgurl="] img',
  1301.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1302.         follow: true,
  1303.       },
  1304.       isGoogleImages && {
  1305.         e: '[data-tbnid] a:not([href])',
  1306.         s: (m, a) => {
  1307.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1308.           new MutationObserver((_, mo) => {
  1309.             mo.disconnect();
  1310.             App.isEnabled = true;
  1311.             a.alt = a2.innerText;
  1312.             const {left, top} = a.getBoundingClientRect();
  1313.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1314.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1315.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1316.         },
  1317.       },
  1318.       dotDomain.endsWith('.instagram.com') && {
  1319.         e: [
  1320.           'a[href*="/p/"]',
  1321.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1322.         ],
  1323.         s: (m, node, rule) => {
  1324.           let data, a, n, img, src;
  1325.           if (location.pathname.startsWith('/p/')) {
  1326.             img = $('img[srcset], video', node.parentNode);
  1327.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1328.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1329.           }
  1330.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1331.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1332.             data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  1333.           }
  1334.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1335.           Ruler.toggle(rule, 'g', a && $('[class*="Carousel"]', a));
  1336.           rule.follow = !data && !rule.g;
  1337.           rule._data = data;
  1338.           rule._img = img;
  1339.           return (
  1340.             !a && !src ? false :
  1341.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1342.                 data.video_url || data.display_url);
  1343.         },
  1344.         c: (html, doc, node, rule) =>
  1345.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1346.         follow: true,
  1347.         _q: 'meta[property="og:video"]',
  1348.         _g(text, doc, url, m, rule) {
  1349.           const media = JSON.parse(text).graphql.shortcode_media;
  1350.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1351.             url: e.node.video_url || e.node.display_url,
  1352.           }));
  1353.           items.title = tryCatch(rule._getCaption, media) || '';
  1354.           return items;
  1355.         },
  1356.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1357.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1358.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1359.       },
  1360.       ...dotDomain.endsWith('.reddit.com') && [{
  1361.         u: '||i.reddituploads.com/',
  1362.       }, {
  1363.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1364.         s: (m, node) => $propUp(node, 'data-url'),
  1365.       }, {
  1366.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1367.         s: 'https://i$1',
  1368.       }] || [],
  1369.       dotDomain.endsWith('.tumblr.com') && {
  1370.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1371.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1372.         follow: true,
  1373.       },
  1374.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1375.         e: 'a.media-item, a.js-media-image-link',
  1376.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1377.         follow: true,
  1378.       },
  1379.       dotDomain.endsWith('.twitter.com') && {
  1380.         e: '.grid-tweet > .media-overlay',
  1381.         s: (m, node) => node.previousElementSibling.src,
  1382.         follow: true,
  1383.       },
  1384.     ];
  1385.  
  1386.     const main = [
  1387.       {
  1388.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1389.         s: '$1',
  1390.         follow: true,
  1391.         onerror: 'skip',
  1392.       },
  1393.       {
  1394.         u: [
  1395.           '||500px.com/photo/',
  1396.           '||cl.ly/',
  1397.           '||cweb-pix.com/',
  1398.           '||ibb.co/',
  1399.           '||imgcredit.xyz/image/',
  1400.         ],
  1401.         r: /\.\w+\/.+/,
  1402.         q: 'meta[property="og:image"]',
  1403.       },
  1404.       {
  1405.         u: 'attachment.php',
  1406.         r: /attachment\.php.+attachmentid/,
  1407.       },
  1408.       {
  1409.         u: '||abload.de/image',
  1410.         q: '#image',
  1411.       },
  1412.       {
  1413.         u: '||deviantart.com/art/',
  1414.         s: (m, node) =>
  1415.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1416.             '' :
  1417.             m.input,
  1418.         q: [
  1419.           '#download-button[href*=".jpg"]',
  1420.           '#download-button[href*=".jpeg"]',
  1421.           '#download-button[href*=".gif"]',
  1422.           '#download-button[href*=".png"]',
  1423.           '#gmi-ResViewSizer_fullimg',
  1424.           'img.dev-content-full',
  1425.         ],
  1426.       },
  1427.       {
  1428.         u: '||dropbox.com/s',
  1429.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1430.         q: (text, doc) =>
  1431.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1432.       },
  1433.       {
  1434.         r: /[./]ebay\.[^/]+\/itm\//,
  1435.         q: text =>
  1436.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1437.             .replace(/~~60_\d+/, '~~60_57'),
  1438.       },
  1439.       {
  1440.         u: '||i.ebayimg.com/',
  1441.         s: (m, node) =>
  1442.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1443.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1444.       },
  1445.       {
  1446.         u: '||fastpic.ru',
  1447.         e: 'a',
  1448.         q: 'img[src*="/big/"]',
  1449.         xhr: true,
  1450.       },
  1451.       {
  1452.         u: '||facebook.com/',
  1453.         r: /photo\.php|[^/]+\/photos\//,
  1454.         s: (m, node) =>
  1455.           node.id === 'fbPhotoImage' ? false :
  1456.             /gradient\.png$/.test(m.input) ? '' :
  1457.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1458.         q: [
  1459.           'div + span > a:first-child:not([href*="tag_faces"])',
  1460.           'div + span > a[href*="tag_faces"] ~ a',
  1461.         ],
  1462.         rect: '#fbProfileCover',
  1463.       },
  1464.       {
  1465.         u: '||fbcdn.',
  1466.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1467.         s: m =>
  1468.           dotDomain.endsWith('.facebook.com') &&
  1469.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1470.           false,
  1471.         manual: true,
  1472.       },
  1473.       {
  1474.         u: ['||fbcdn-', 'fbcdn.net/'],
  1475.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1476.         s: (m, node) => {
  1477.           if (node.id === 'fbPhotoImage') {
  1478.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1479.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1480.           }
  1481.           if (m[4])
  1482.             return false;
  1483.           const pn = node.parentNode;
  1484.           if (pn.outerHTML.includes('/hovercard/'))
  1485.             return '';
  1486.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1487.             return false;
  1488.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1489.         },
  1490.         rect: '.photoWrap',
  1491.       },
  1492.       {
  1493.         u: '||flickr.com/photos/',
  1494.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1495.         s: m =>
  1496.           m.input.indexOf('/sizes/') < 0 ?
  1497.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1498.             false,
  1499.         q: (text, doc) => {
  1500.           const links = $$('.sizes-list a', doc);
  1501.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1502.         },
  1503.         follow: true,
  1504.       },
  1505.       {
  1506.         u: '||flickr.com/photos/',
  1507.         r: /\/sizes\//,
  1508.         q: '#allsizes-photo > img',
  1509.       },
  1510.       {
  1511.         u: '||gfycat.com/',
  1512.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1513.         s: 'https://$1$3',
  1514.         q: [
  1515.           'meta[content$=".webm"]',
  1516.           '#webmsource',
  1517.           'source[src$=".webm"]',
  1518.         ],
  1519.       },
  1520.       {
  1521.         u: [
  1522.           '||googleusercontent.com/proxy',
  1523.           '||googleusercontent.com/gadgets/proxy',
  1524.         ],
  1525.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1526.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1527.       },
  1528.       {
  1529.         u: [
  1530.           '||googleusercontent.com/',
  1531.           '||ggpht.com/',
  1532.         ],
  1533.         s: m => m.input.includes('webcache.') ? '' :
  1534.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1535.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1536.       },
  1537.       {
  1538.         u: '||gravatar.com/',
  1539.         r: /([a-z0-9]{32})/,
  1540.         s: 'https://gravatar.com/avatar/$1?s=200',
  1541.       },
  1542.       {
  1543.         u: '//gyazo.com/',
  1544.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1545.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1546.         _q: 'meta[name="twitter:image"]',
  1547.       },
  1548.       {
  1549.         u: '||hostingkartinok.com/show-image.php',
  1550.         q: '.image img',
  1551.       },
  1552.       {
  1553.         u: [
  1554.           '||imagecurl.com/images/',
  1555.           '||imagecurl.com/viewer.php',
  1556.         ],
  1557.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1558.         s: 'https://imagecurl.com/images/$1$2$3',
  1559.       },
  1560.       {
  1561.         u: '||imagebam.com/image/',
  1562.         q: 'meta[property="og:image"]',
  1563.         tabfix: true,
  1564.         xhr: hostname.includes('planetsuzy'),
  1565.       },
  1566.       {
  1567.         u: '||imageban.ru/thumbs',
  1568.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1569.         s: '$1out$2/$3/$4',
  1570.       },
  1571.       {
  1572.         u: [
  1573.           '||imageban.ru/show',
  1574.           '||imageban.net/show',
  1575.           '||ibn.im/',
  1576.         ],
  1577.         q: '#img_main',
  1578.       },
  1579.       {
  1580.         u: '||imageshack.us/img',
  1581.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1582.         s: 'https://$2/download/$1/$3$4',
  1583.       },
  1584.       {
  1585.         u: '||imageshack.us/i/',
  1586.         q: '#share-dl',
  1587.       },
  1588.       {
  1589.         u: '||imageteam.org/img',
  1590.         q: 'img[alt="image"]',
  1591.       },
  1592.       {
  1593.         u: [
  1594.           '||imagetwist.com/',
  1595.           '||imageshimage.com/',
  1596.         ],
  1597.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1598.         q: 'img.pic',
  1599.         xhr: true,
  1600.       },
  1601.       {
  1602.         u: '||imageupper.com/i/',
  1603.         q: '#img',
  1604.         xhr: true,
  1605.       },
  1606.       {
  1607.         u: '||imagevenue.com/',
  1608.         q: 'a[data-toggle="full"] img',
  1609.       },
  1610.       {
  1611.         u: '||imagezilla.net/show/',
  1612.         q: '#photo',
  1613.         xhr: true,
  1614.       },
  1615.       {
  1616.         u: [
  1617.           '||images-na.ssl-images-amazon.com/images/',
  1618.           '||media-imdb.com/images/',
  1619.         ],
  1620.         r: /images\/.+?\.jpg/,
  1621.         s: '/V1\\.?_.+?\\.//g',
  1622.       },
  1623.       {
  1624.         u: '||imgbox.com/',
  1625.         r: /\.com\/([a-z0-9]+)$/i,
  1626.         q: '#img',
  1627.         xhr: hostname !== 'imgbox.com',
  1628.       },
  1629.       {
  1630.         u: '||imgclick.net/',
  1631.         r: /\.net\/(\w+)/,
  1632.         q: 'img.pic',
  1633.         xhr: true,
  1634.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1635.       },
  1636.       {
  1637.         u: [
  1638.           '||imgflip.com/i/',
  1639.           '||imgflip.com/gif/',
  1640.         ],
  1641.         r: /\/(i|gif)\/([^/?#]+)/,
  1642.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1643.       },
  1644.       {
  1645.         u: [
  1646.           '||imgur.com/a/',
  1647.           '||imgur.com/gallery/',
  1648.           '||imgur.com/t/',
  1649.         ],
  1650.         g: async (text, doc, url, m, rule, node, cb) => {
  1651.           // simplified extraction of JSON as it occupies only one line
  1652.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1653.             return;
  1654.           const info = JSON.parse(RegExp.$1);
  1655.           let images = info.is_album ? info.album_images.images : [info];
  1656.           if (info.num_images > images.length) {
  1657.             const u = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1658.             images = JSON.parse((await Remoting.gmXhr(u)).responseText).data.images;
  1659.           }
  1660.           const items = [];
  1661.           for (const img of images || []) {
  1662.             const u = `https://i.imgur.com/${img.hash}`;
  1663.             items.push({
  1664.               url: img.ext === '.gif' && img.animated !== false ?
  1665.                 [`${u}.webm`, `${u}.mp4`, u] :
  1666.                 u + img.ext,
  1667.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1668.             });
  1669.           }
  1670.           if (images && info.is_album && !`${items[0].desc || ''}`.includes(info.title))
  1671.             items.title = info.title;
  1672.           cb(items);
  1673.         },
  1674.         css: '.post > .hover { display:none!important; }',
  1675.       },
  1676.       {
  1677.         u: '||imgur.com/',
  1678.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1679.         s: 'gallery',
  1680.         g: (text, doc, url, m) =>
  1681.           m[2].split(',').map(id => ({
  1682.             url: `https://i.${m[1]}${id}.jpg`,
  1683.           })),
  1684.       },
  1685.       {
  1686.         u: '||imgur.com/',
  1687.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1688.         s: (m, node) => {
  1689.           if (/memegen|random|register|search|signin/.test(m.input))
  1690.             return '';
  1691.           const a = node.closest('a');
  1692.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1693.             return false;
  1694.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1695.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1696.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1697.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1698.           return ext === 'webm' ?
  1699.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1700.             u + ext;
  1701.         },
  1702.       },
  1703.       {
  1704.         u: [
  1705.           '||instagr.am/p/',
  1706.           '||instagram.com/p/',
  1707.         ],
  1708.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1709.         q: text => {
  1710.           const m = JSON.parse(text).graphql.shortcode_media;
  1711.           return m.video_url || m.display_url;
  1712.         },
  1713.         rect: 'div.PhotoGridMediaItem',
  1714.         c: text => {
  1715.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1716.           return m === undefined ? '(no caption)' : m.node.text;
  1717.         },
  1718.       },
  1719.       {
  1720.         u: [
  1721.           '||livememe.com/',
  1722.           '||lvme.me/',
  1723.         ],
  1724.         r: /\.\w+\/([^.]+)$/,
  1725.         s: 'http://i.lvme.me/$1.jpg',
  1726.       },
  1727.       {
  1728.         u: '||lostpic.net/image',
  1729.         q: '.image-viewer-image img',
  1730.       },
  1731.       {
  1732.         u: '||makeameme.org/meme/',
  1733.         r: /\/meme\/([^/?#]+)/,
  1734.         s: 'https://media.makeameme.org/created/$1.jpg',
  1735.       },
  1736.       {
  1737.         u: '||photobucket.com/',
  1738.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1739.         s: 'https://i$1$3',
  1740.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1741.       },
  1742.       {
  1743.         u: '||piccy.info/view3/',
  1744.         r: /(.+?\/view3)\/(.*)\//,
  1745.         s: '$1/$2/orig/',
  1746.         q: '#mainim',
  1747.       },
  1748.       {
  1749.         u: '||pimpandhost.com/image/',
  1750.         r: /(.+?\/image\/[0-9]+)/,
  1751.         s: '$1?size=original',
  1752.         q: 'img.original',
  1753.       },
  1754.       {
  1755.         u: [
  1756.           '||pixroute.com/',
  1757.           '||imgspice.com/',
  1758.         ],
  1759.         r: /\.html$/,
  1760.         q: 'img[id]',
  1761.         xhr: true,
  1762.       },
  1763.       {
  1764.         u: '||postima',
  1765.         r: /postima?ge?\.org\/image\/\w+/,
  1766.         q: [
  1767.           'a[href*="dl="]',
  1768.           '#main-image',
  1769.         ],
  1770.       },
  1771.       {
  1772.         u: [
  1773.           '||prntscr.com/',
  1774.           '||prnt.sc/',
  1775.         ],
  1776.         r: /\.\w+\/.+/,
  1777.         q: 'meta[property="og:image"]',
  1778.         xhr: true,
  1779.       },
  1780.       {
  1781.         u: '||radikal.ru/',
  1782.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1783.         s: (m, node, rule) =>
  1784.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1785.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1786.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1787.       },
  1788.       {
  1789.         u: '||tumblr.com',
  1790.         r: /_500\.jpg/,
  1791.         s: ['/_500/_1280/', ''],
  1792.       },
  1793.       {
  1794.         u: '||twimg.com/',
  1795.         r: /\/profile_images/i,
  1796.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1797.       },
  1798.       {
  1799.         u: '||twimg.com/media/',
  1800.         r: /.+?format=(jpe?g|png|gif)/i,
  1801.         s: '$0&name=orig',
  1802.       },
  1803.       {
  1804.         u: '||twimg.com/1/proxy',
  1805.         r: /t=([^&_]+)/i,
  1806.         s: m => atob(m[1]).match(/http.+/),
  1807.       },
  1808.       {
  1809.         u: '||pic.twitter.com/',
  1810.         r: /\.com\/[a-z0-9]+/i,
  1811.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1812.         follow: true,
  1813.       },
  1814.       {
  1815.         u: '||twitpic.com/',
  1816.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1817.         s: 'https://twitpic.com/show/large/$2',
  1818.       },
  1819.       {
  1820.         u: '||upix.me/files',
  1821.         s: '/#//',
  1822.       },
  1823.       {
  1824.         u: '||wiki',
  1825.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1826.         s: '/\\/thumb(?=\\/)|' +
  1827.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1828.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1829.         xhr: !hostname.includes('wiki'),
  1830.       },
  1831.       {
  1832.         u: '||ytimg.com/vi/',
  1833.         r: /(.+?\/vi\/[^/]+)/,
  1834.         s: '$1/0.jpg',
  1835.         rect: '.video-list-item',
  1836.       },
  1837.       {
  1838.         u: '/viewer.php?file=',
  1839.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1840.         s: '$1/images/$2',
  1841.         xhr: true,
  1842.       },
  1843.       {
  1844.         u: '/thumb_',
  1845.         r: /\/albums.+\/thumb_[^/]/,
  1846.         s: '/thumb_//',
  1847.       },
  1848.       {
  1849.         u: [
  1850.           '.th.jp',
  1851.           '.th.gif',
  1852.           '.th.png',
  1853.         ],
  1854.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1855.         s: '$1$2',
  1856.         follow: true,
  1857.       },
  1858.       {
  1859.         r: RX_MEDIA_URL,
  1860.       },
  1861.     ];
  1862.  
  1863.     /** @type mpiv.HostRule[] */
  1864.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1865.   },
  1866.  
  1867.   format(rule, {expand} = {}) {
  1868.     const s = Util.stringify(rule, null, ' ');
  1869.     return expand ?
  1870.       /* {"a": ...,
  1871.           "b": ...,
  1872.           "c": ...
  1873.          } */
  1874.       s.replace(/^{\s+/g, '{') :
  1875.       /* {"a": ..., "b": ..., "c": ...} */
  1876.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1877.   },
  1878.  
  1879.   /** @returns mpiv.HostRule | Error | false | undefined */
  1880.   parse(rule) {
  1881.     const isBatchOp = this instanceof Map;
  1882.     try {
  1883.       if (typeof rule === 'string')
  1884.         rule = JSON.parse(rule);
  1885.       if ('d' in rule && typeof rule.d !== 'string')
  1886.         rule.d = undefined;
  1887.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1888.         return false;
  1889.       const compileTo = isBatchOp ? rule : {};
  1890.       if (rule.r)
  1891.         compileTo.r = new RegExp(rule.r, 'i');
  1892.       if (RX_HAS_CODE.test(rule.s))
  1893.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1894.       if (RX_HAS_CODE.test(rule.q))
  1895.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1896.       if (RX_HAS_CODE.test(rule.c))
  1897.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1898.       return rule;
  1899.     } catch (e) {
  1900.       if (!e.message.includes('unsafe-eval'))
  1901.         if (isBatchOp) {
  1902.           this.set(rule, e);
  1903.         } else {
  1904.           return e;
  1905.         }
  1906.     }
  1907.   },
  1908.  
  1909.   runC(text, doc = document) {
  1910.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  1911.     ai.caption = fn(text, doc);
  1912.   },
  1913.  
  1914.   runCHandler: {
  1915.     function: (text, doc) =>
  1916.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  1917.     string: (text, doc) => {
  1918.       const el = $many(ai.rule.c, doc);
  1919.       return !el ? '' :
  1920.         el.getAttribute('content') ||
  1921.         el.getAttribute('title') ||
  1922.         el.textContent;
  1923.     },
  1924.     default: () =>
  1925.       (ai.tooltip || 0).text ||
  1926.       ai.node.alt ||
  1927.       $propUp(ai.node, 'title') ||
  1928.       Remoting.getFileName(
  1929.         ai.node.tagName === (ai.popup || 0).tagName
  1930.           ? ai.url
  1931.           : ai.node.src || $propUp(ai.node, 'href')),
  1932.   },
  1933.  
  1934.   runQ(text, doc, docUrl) {
  1935.     let url;
  1936.     if (typeof ai.rule.q === 'function') {
  1937.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1938.       if (Array.isArray(url)) {
  1939.         ai.urls = url.slice(1);
  1940.         url = url[0];
  1941.       }
  1942.     } else {
  1943.       const el = $many(ai.rule.q, doc);
  1944.       url = Remoting.findImageUrl(el, docUrl);
  1945.     }
  1946.     return url;
  1947.   },
  1948.  
  1949.   /** @returns {?Array} if falsy then the rule should be skipped */
  1950.   runS(node, rule, m) {
  1951.     let urls = [];
  1952.     for (const s of ensureArray(rule.s))
  1953.       urls.push(
  1954.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  1955.           typeof s === 'function' ? s(m, node, rule) :
  1956.             s);
  1957.     if (rule.q && urls.length > 1) {
  1958.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1959.       return;
  1960.     }
  1961.     if (Array.isArray(urls[0]))
  1962.       urls = urls[0];
  1963.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  1964.     return urls[0] !== false && urls.map(Util.decodeUrl);
  1965.   },
  1966.  
  1967.   substituteSingle(s, m) {
  1968.     if (!m) return s;
  1969.     if (s.startsWith('/') && !s.startsWith('//')) {
  1970.       const mid = s.search(/[^\\]\//) + 1;
  1971.       const end = s.lastIndexOf('/');
  1972.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1973.       return m.input.replace(re, s.slice(mid + 1, end));
  1974.     }
  1975.     if (m.length && s.includes('$')) {
  1976.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1977.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1978.         for (let i = maxLength; i >= 0; i--) {
  1979.           const part = num.slice(0, i) | 0;
  1980.           if (part < m.length)
  1981.             return (m[part] || '') + num.slice(i);
  1982.         }
  1983.         return text;
  1984.       });
  1985.     }
  1986.     return s;
  1987.   },
  1988.  
  1989.   toggle(rule, prop, condition) {
  1990.     rule[prop] = condition ? rule[`_${prop}`] : null;
  1991.     return condition;
  1992.   },
  1993. };
  1994.  
  1995. const RuleMatcher = {
  1996.  
  1997.   /** @returns ?mpiv.RuleMatchInfo */
  1998.   findForLink(a) {
  1999.     let url =
  2000.       a.getAttribute('data-expanded-url') ||
  2001.       a.getAttribute('data-full-url') ||
  2002.       a.getAttribute('data-url') ||
  2003.       a.href;
  2004.     if (url.startsWith('data:'))
  2005.       url = false;
  2006.     else if (url.includes('//t.co/'))
  2007.       url = 'http://' + a.textContent;
  2008.     return RuleMatcher.find(url, a);
  2009.   },
  2010.  
  2011.   /** @returns ?mpiv.RuleMatchInfo */
  2012.   find(url, node, {noHtml, skipRules} = {}) {
  2013.     const tn = node.tagName;
  2014.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2015.     const isPicOrLink = isPic || tn === 'A';
  2016.     let m, html;
  2017.     for (const rule of Ruler.rules) {
  2018.       const u = rule[SYM_U] || rule.u && (rule[SYM_U] = UrlMatcher(rule.u));
  2019.       if (u && (!url || !u.fn.call(u.data, url)) ||
  2020.           rule.e && !node.matches(rule.e) ||
  2021.           skipRules && skipRules.includes(rule))
  2022.         continue;
  2023.       if (rule.r)
  2024.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2025.           ? rule.r.exec(html || (html = node.outerHTML))
  2026.           : url && rule.r.exec(url);
  2027.       else if (url)
  2028.         m = Object.assign([url], {index: 0, input: url});
  2029.       else
  2030.         m = [];
  2031.       if (!m)
  2032.         continue;
  2033.       if (rule.s === '')
  2034.         return {};
  2035.       let hasS = rule.s != null;
  2036.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2037.       // but we'll only allow it to match rules without 's' in the nested find call
  2038.       if (isPic && !hasS && !skipRules)
  2039.         continue;
  2040.       hasS &= rule.s !== 'gallery';
  2041.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2042.       if (urls)
  2043.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2044.     }
  2045.   },
  2046.  
  2047.   /** @returns ?mpiv.RuleMatchInfo */
  2048.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2049.     let info;
  2050.     let url = `${urls[0]}`;
  2051.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2052.     if (!url)
  2053.       info = {};
  2054.     if (follow)
  2055.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2056.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2057.       const xhr = cfg.xhr && rule.xhr;
  2058.       if (url.startsWith('//'))
  2059.         url = location.protocol + url;
  2060.       info = {
  2061.         match,
  2062.         node,
  2063.         rule,
  2064.         url,
  2065.         urls: urls.length > 1 ? urls.slice(1) : null,
  2066.         gallery: rule.g && Gallery.makeParser(rule.g),
  2067.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2068.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2069.       };
  2070.     }
  2071.     return info;
  2072.   },
  2073.  
  2074.   isFollowableUrl(url, rule) {
  2075.     const f = rule.follow;
  2076.     return typeof f === 'function' ? f(url) : f;
  2077.   },
  2078. };
  2079.  
  2080. const Remoting = {
  2081.  
  2082.   gmXhr(url, opts = {}) {
  2083.     if (ai.req)
  2084.       tryCatch.call(ai.req, ai.req.abort);
  2085.     return new Promise((resolve, reject) => {
  2086.       ai.req = GM_xmlhttpRequest({
  2087.         url,
  2088.         method: 'GET',
  2089.         anonymous: (ai.rule || {}).anonymous,
  2090.         timeout: 30e3,
  2091.         ...opts,
  2092.         onload: done,
  2093.         onerror: done,
  2094.         ontimeout() {
  2095.           ai.req = null;
  2096.           reject(`Timeout fetching ${url}`);
  2097.         },
  2098.       });
  2099.       function done(r) {
  2100.         ai.req = null;
  2101.         if (r.status < 400 && !r.error)
  2102.           resolve(r);
  2103.         else
  2104.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2105.       }
  2106.     });
  2107.   },
  2108.  
  2109.   async getDoc(url) {
  2110.     const r = await (!ai.post ?
  2111.       Remoting.gmXhr(url) :
  2112.       Remoting.gmXhr(url, {
  2113.         method: 'POST',
  2114.         data: ai.post,
  2115.         headers: {
  2116.           'Content-Type': 'application/x-www-form-urlencoded',
  2117.           'Referer': url,
  2118.         },
  2119.       }));
  2120.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2121.     return r;
  2122.   },
  2123.  
  2124.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2125.     ai.bufBar = false;
  2126.     ai.bufStart = now();
  2127.     const response = await Remoting.gmXhr(url, {
  2128.       responseType: 'blob',
  2129.       headers: {
  2130.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2131.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2132.       },
  2133.       onprogress: Remoting.getImageProgress,
  2134.     });
  2135.     Bar.set(false);
  2136.     const type = Remoting.guessMimeType(response);
  2137.     let b = response.response;
  2138.     if (!b) throw 'Empty response';
  2139.     if (b.type !== type)
  2140.       b = b.slice(0, b.size, type);
  2141.     return [
  2142.       xhr === 'blob' ? URL.createObjectURL(b) : await Remoting.blobToDataUrl(b),
  2143.       type.startsWith('video'),
  2144.     ];
  2145.   },
  2146.  
  2147.   getImageProgress(e) {
  2148.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2149.       ai.bufBar = true;
  2150.     if (ai.bufBar) {
  2151.       const pct = e.loaded / e.total * 100 | 0;
  2152.       const size = e.total / 1024 | 0;
  2153.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2154.     }
  2155.   },
  2156.  
  2157.   async findRedirect() {
  2158.     try {
  2159.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2160.         method: 'HEAD',
  2161.         headers: {
  2162.           'Referer': location.href.split('#', 1)[0],
  2163.         },
  2164.       });
  2165.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2166.       if (!info || !info.url)
  2167.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2168.       Object.assign(ai, info);
  2169.       App.startSingle();
  2170.     } catch (e) {
  2171.       App.handleError(e);
  2172.     }
  2173.   },
  2174.  
  2175.   async saveFile() {
  2176.     const url = ai.popup.src || ai.popup.currentSrc;
  2177.     let name = Remoting.getFileName(ai.imageUrl || url);
  2178.     if (!name.includes('.'))
  2179.       name += '.jpg';
  2180.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2181.       $create('a', {href: url, download: name})
  2182.         .dispatchEvent(new MouseEvent('click'));
  2183.     } else {
  2184.       Status.set('+loading');
  2185.       const onload = () => Status.set('-loading');
  2186.       GM_download({
  2187.         url,
  2188.         name,
  2189.         headers: {Referer: url},
  2190.         onerror: e => {
  2191.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2192.           onload();
  2193.         },
  2194.         onprogress: Remoting.getImageProgress,
  2195.         onload,
  2196.       });
  2197.     }
  2198.   },
  2199.  
  2200.   getFileName(url) {
  2201.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2202.   },
  2203.  
  2204.   blobToDataUrl(blob) {
  2205.     return new Promise((resolve, reject) => {
  2206.       const fr = new FileReader();
  2207.       fr.onload = () => resolve(fr.result);
  2208.       fr.onerror = reject;
  2209.       fr.readAsDataURL(blob);
  2210.     });
  2211.   },
  2212.  
  2213.   guessMimeType({responseHeaders, finalUrl}) {
  2214.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2215.         !RegExp.$1.includes('text/plain'))
  2216.       return RegExp.$1;
  2217.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2218.     switch (ext.toLowerCase()) {
  2219.       case 'bmp': return 'image/bmp';
  2220.       case 'gif': return 'image/gif';
  2221.       case 'jpe': return 'image/jpeg';
  2222.       case 'jpeg': return 'image/jpeg';
  2223.       case 'jpg': return 'image/jpeg';
  2224.       case 'mp4': return 'video/mp4';
  2225.       case 'png': return 'image/png';
  2226.       case 'svg': return 'image/svg+xml';
  2227.       case 'tif': return 'image/tiff';
  2228.       case 'tiff': return 'image/tiff';
  2229.       case 'webm': return 'video/webm';
  2230.       default: return 'application/octet-stream';
  2231.     }
  2232.   },
  2233.  
  2234.   findImageUrl(n, url) {
  2235.     if (!n) return;
  2236.     let html;
  2237.     const path =
  2238.       n.getAttribute('src') ||
  2239.       n.getAttribute('data-m4v') ||
  2240.       n.getAttribute('href') ||
  2241.       n.getAttribute('content') ||
  2242.       (html = n.outerHTML).includes('http') &&
  2243.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2244.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2245.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2246.   },
  2247. };
  2248.  
  2249. const Status = {
  2250.  
  2251.   set(status) {
  2252.     if (!status && !cfg.globalStatus) {
  2253.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2254.       return;
  2255.     }
  2256.     const prefix = cfg.globalStatus ? PREFIX : '';
  2257.     const action = status && /^[+-]/.test(status) && status[0];
  2258.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2259.     const el = cfg.globalStatus ? doc.documentElement :
  2260.       name === 'edge' ? ai.popup :
  2261.         ai.node;
  2262.     if (!el) return;
  2263.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2264.     const oldValue = (el.getAttribute(attr) || '').trim();
  2265.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2266.     switch (action) {
  2267.       case '-':
  2268.         cls.delete(name);
  2269.         break;
  2270.       case false:
  2271.         for (const c of cls)
  2272.           if (c.startsWith(prefix) && c !== name)
  2273.             cls.delete(c);
  2274.       // fallthrough to +
  2275.       case '+':
  2276.         if (name)
  2277.           cls.add(name);
  2278.         break;
  2279.     }
  2280.     const newValue = [...cls].join(' ');
  2281.     if (newValue !== oldValue)
  2282.       el.setAttribute(attr, newValue);
  2283.   },
  2284.  
  2285.   loading(force) {
  2286.     if (!force) {
  2287.       clearTimeout(ai.timerStatus);
  2288.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2289.     } else if (!ai.popupLoaded) {
  2290.       Status.set('+loading');
  2291.     }
  2292.   },
  2293. };
  2294.  
  2295. const UrlMatcher = (() => {
  2296.   // string-to-regexp escaped chars
  2297.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2298.   // rx for '^' symbol in simple url match
  2299.   const RX_SEP = /[^\w%._-]/y;
  2300.   const RXS_SEP = RX_SEP.source;
  2301.   return match => {
  2302.     const results = [];
  2303.     for (const s of ensureArray(match)) {
  2304.       const pinDomain = s.startsWith('||');
  2305.       const pinStart = !pinDomain && s.startsWith('|');
  2306.       const endSep = s.endsWith('^');
  2307.       let fn;
  2308.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2309.       if (needle.includes('^')) {
  2310.         let plain = '';
  2311.         for (const part of needle.split('^'))
  2312.           if (part.length > plain.length)
  2313.             plain = part;
  2314.         const rx = new RegExp(
  2315.           (pinStart ? '^' : '') +
  2316.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2317.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2318.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2319.         needle = [plain, rx];
  2320.         fn = regexp;
  2321.       } else if (pinStart) {
  2322.         fn = endSep ? equals : starts;
  2323.       } else if (pinDomain) {
  2324.         const slashPos = needle.indexOf('/');
  2325.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2326.         needle = [needle, domain, slashPos > 0, endSep];
  2327.         fn = startsDomainPrescreen;
  2328.       } else if (endSep) {
  2329.         fn = ends;
  2330.       } else {
  2331.         fn = has;
  2332.       }
  2333.       results.push({fn, data: needle});
  2334.     }
  2335.     return results.length > 1 ?
  2336.       {fn: checkArray, data: results} :
  2337.       results[0];
  2338.   };
  2339.   function checkArray(s) {
  2340.     return this.some(checkArrayItem, s);
  2341.   }
  2342.   function checkArrayItem(item) {
  2343.     return item.fn.call(item.data, this);
  2344.   }
  2345.   function ends(s) {
  2346.     return s.endsWith(this) || (
  2347.       s.length > this.length &&
  2348.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2349.       endsWithSep(s));
  2350.   }
  2351.   function endsWithSep(s, pos = s.length - 1) {
  2352.     RX_SEP.lastIndex = pos;
  2353.     return RX_SEP.test(s);
  2354.   }
  2355.   function equals(s) {
  2356.     return s.startsWith(this) && (
  2357.       s.length === this.length ||
  2358.       s.length === this.length + 1 && endsWithSep(s));
  2359.   }
  2360.   function has(s) {
  2361.     return s.includes(this);
  2362.   }
  2363.   function regexp(s) {
  2364.     return s.includes(this[0]) && this[1].test(s);
  2365.   }
  2366.   function starts(s) {
  2367.     return s.startsWith(this);
  2368.   }
  2369.   function startsDomainPrescreen(url) {
  2370.     return url.includes(this[0]) && startsDomain.call(this, url);
  2371.   }
  2372.   function startsDomain(url) {
  2373.     let hostStart = url.indexOf('//');
  2374.     if (hostStart && url[hostStart - 1] !== ':')
  2375.       return;
  2376.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2377.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2378.     const [needle, domain, pinDomainEnd, endSep] = this;
  2379.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2380.     for (; ; start++) {
  2381.       start = host.indexOf(domain, start);
  2382.       if (start < 0)
  2383.         return;
  2384.       if (!start || host[start - 1] === '.')
  2385.         break;
  2386.     }
  2387.     start += hostStart;
  2388.     if (url.lastIndexOf(needle, start) !== start)
  2389.       return;
  2390.     const end = start + needle.length;
  2391.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2392.   }
  2393. })();
  2394.  
  2395. const Util = {
  2396.  
  2397.   addStyle(name, css) {
  2398.     const id = `${PREFIX}style:${name}`;
  2399.     const el = doc.getElementById(id) ||
  2400.                css && $create('style', {id});
  2401.     if (!el) return;
  2402.     if (el.textContent !== css)
  2403.       el.textContent = css;
  2404.     if (el.parentElement !== doc.head)
  2405.       doc.head.appendChild(el);
  2406.     return el;
  2407.   },
  2408.  
  2409.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2410.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2411.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2412.   },
  2413.  
  2414.   decodeHtmlEntities(s) {
  2415.     return s
  2416.       .replace(/&quot;/g, '"')
  2417.       .replace(/&apos;/g, '\'')
  2418.       .replace(/&lt;/g, '<')
  2419.       .replace(/&gt;/g, '>')
  2420.       .replace(/&amp;/g, '&');
  2421.   },
  2422.  
  2423.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2424.   decodeUrl(url) {
  2425.     if (!url) return url;
  2426.     const iPct = url.indexOf('%');
  2427.     const iColon = url.indexOf(':');
  2428.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2429.       decodeURIComponent(url) :
  2430.       url;
  2431.   },
  2432.  
  2433.   deepEqual(a, b) {
  2434.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2435.       return a === b;
  2436.     if (Array.isArray(a)) {
  2437.       return Array.isArray(b) &&
  2438.         a.length === b.length &&
  2439.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2440.     }
  2441.     const keys = Object.keys(a);
  2442.     return keys.length === Object.keys(b).length &&
  2443.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2444.   },
  2445.  
  2446.   forceLayout(node) {
  2447.     // eslint-disable-next-line no-unused-expressions
  2448.     node.clientHeight;
  2449.   },
  2450.  
  2451.   formatError(e, rule) {
  2452.     const message =
  2453.       e.message ||
  2454.       e.readyState && 'Request failed.' ||
  2455.       e.type === 'error' && `File can't be displayed.${
  2456.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2457.       }` ||
  2458.       e;
  2459.     const m = [
  2460.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2461.       ['', 'font-weight:normal;color:unset'],
  2462.     ];
  2463.     m.push(...[
  2464.       ['Node: %o', ai.node],
  2465.       ['Rule: %o', rule],
  2466.       ai.url && ['URL: %s', ai.url],
  2467.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2468.     ].filter(Boolean));
  2469.     return {
  2470.       message,
  2471.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2472.       consoleArgs: m.map(([, v]) => v),
  2473.     };
  2474.   },
  2475.  
  2476.   isHovered(el) {
  2477.     // doesn't work in image tabs, browser bug?
  2478.     return App.isImageTab || el.closest(':hover');
  2479.   },
  2480.  
  2481.   isVideoUrl(url) {
  2482.     return url.startsWith('data:video') ||
  2483.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2484.   },
  2485.  
  2486.   newFunction(...args) {
  2487.     try {
  2488.       return App.NOP || new Function(...args);
  2489.     } catch (e) {
  2490.       if (!e.message.includes('unsafe-eval'))
  2491.         throw e;
  2492.       App.NOP = () => {};
  2493.       return App.NOP;
  2494.     }
  2495.   },
  2496.  
  2497.   rel2abs(rel, abs = location.href) {
  2498.     try {
  2499.       return rel.startsWith('data:') ? rel :
  2500.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2501.           new URL(rel, abs).href;
  2502.     } catch (e) {
  2503.       return rel;
  2504.     }
  2505.   },
  2506.  
  2507.   stringify(...args) {
  2508.     const p = Array.prototype;
  2509.     const {toJSON} = p;
  2510.     if (toJSON) p.toJSON = null;
  2511.     const res = JSON.stringify(...args);
  2512.     if (toJSON) p.toJSON = toJSON;
  2513.     return res;
  2514.   },
  2515.  
  2516.   suppressTooltip() {
  2517.     for (const node of [
  2518.       ai.node.parentNode,
  2519.       ai.node,
  2520.       ai.node.firstElementChild,
  2521.     ]) {
  2522.       const t = (node || 0).title;
  2523.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2524.         ai.tooltip = {node, text: t};
  2525.         node.title = '';
  2526.         break;
  2527.       }
  2528.     }
  2529.   },
  2530.  
  2531.   tabFixUrl() {
  2532.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2533.            navigator.userAgent.includes('Gecko/') &&
  2534.            flattenHtml(`data:text/html;charset=utf8,
  2535.       <style>
  2536.         body {
  2537.           margin: 0;
  2538.           padding: 0;
  2539.           background: #222;
  2540.         }
  2541.         .fit {
  2542.           overflow: hidden
  2543.         }
  2544.         .fit > img {
  2545.           max-width: 100vw;
  2546.           max-height: 100vh;
  2547.         }
  2548.         body > img {
  2549.           margin: auto;
  2550.           position: absolute;
  2551.           left: 0;
  2552.           right: 0;
  2553.           top: 0;
  2554.           bottom: 0;
  2555.         }
  2556.       </style>
  2557.       <body class=fit>
  2558.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2559.       </body>
  2560.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2561.   },
  2562. };
  2563.  
  2564. function setup({rule} = {}) {
  2565.   if (typeof doc.body.attachShadow !== 'function') {
  2566.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2567.           'You can edit the script\'s storage directly in your userscript manager.');
  2568.     return;
  2569.   }
  2570.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2571.   let uiCfg;
  2572.   let root = (elConfig || 0).shadowRoot;
  2573.   let {blankRuleElement} = setup;
  2574.   /** @type NodeList */
  2575.   const UI = new Proxy({}, {
  2576.     get(_, id) {
  2577.       return root.getElementById(id);
  2578.     },
  2579.   });
  2580.   if (!rule || !elConfig)
  2581.     init(new Config({save: true}));
  2582.   if (rule)
  2583.     installRule(rule);
  2584.  
  2585.   function init(data) {
  2586.     uiCfg = data;
  2587.     $remove(elConfig);
  2588.     elConfig = $create('div', {contentEditable: true});
  2589.     root = elConfig.attachShadow({mode: 'open'});
  2590.     root.innerHTML = createConfigHtml();
  2591.     initEvents();
  2592.     renderAll();
  2593.     renderCustomScales();
  2594.     renderRules();
  2595.     doc.body.appendChild(elConfig);
  2596.     requestAnimationFrame(() => {
  2597.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2598.     });
  2599.   }
  2600.  
  2601.   function initEvents() {
  2602.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2603.     UI._export.onclick = e => {
  2604.       dropEvent(e);
  2605.       GM_setClipboard(Util.stringify(collectConfig(), null, '  '));
  2606.       UI._exportNotification.hidden = false;
  2607.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2608.     };
  2609.     UI._import.onclick = e => {
  2610.       dropEvent(e);
  2611.       const s = prompt('Paste settings:');
  2612.       if (s)
  2613.         init(new Config({data: s}));
  2614.     };
  2615.     UI._install.onclick = setupRuleInstaller;
  2616.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2617.     UI._reveal.onclick = e => {
  2618.       e.preventDefault();
  2619.       cssApp.hidden = !cssApp.hidden;
  2620.       if (!cssApp.hidden) {
  2621.         if (!cssApp.value) {
  2622.           App.updateStyles();
  2623.           cssApp.value = App.globalStyle.trim();
  2624.           cssApp.setSelectionRange(0, 0);
  2625.         }
  2626.         cssApp.focus();
  2627.       }
  2628.     };
  2629.     UI.start.onchange = function () {
  2630.       UI.delay.closest('label').hidden =
  2631.         UI.preload.closest('label').hidden =
  2632.           this.value !== 'auto';
  2633.     };
  2634.     UI.start.onchange();
  2635.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2636.     // color
  2637.     for (const el of $$('[type="color"]', root)) {
  2638.       el.oninput = colorOnInput;
  2639.       el.elSwatch = el.nextElementSibling;
  2640.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2641.       el.elOpacity.elColor = el;
  2642.     }
  2643.     function colorOnInput() {
  2644.       this.elSwatch.style.setProperty('--color',
  2645.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2646.     }
  2647.     // range
  2648.     for (const el of $$('[type="range"]', root)) {
  2649.       el.oninput = rangeOnInput;
  2650.       el.onblur = rangeOnBlur;
  2651.       el.addEventListener('focusin', rangeOnFocus);
  2652.     }
  2653.     function rangeOnBlur(e) {
  2654.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2655.         this.elEdit.onblur(e);
  2656.     }
  2657.     function rangeOnFocus() {
  2658.       if (this.elEdit) return;
  2659.       const {min, max, step, value} = this;
  2660.       this.elEdit = $create('input', {
  2661.         value, min, max, step,
  2662.         className: 'range-edit',
  2663.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2664.         type: 'number',
  2665.         elRange: this,
  2666.         onblur: rangeEditOnBlur,
  2667.         oninput: rangeEditOnInput,
  2668.       });
  2669.       this.insertAdjacentElement('afterend', this.elEdit);
  2670.     }
  2671.     function rangeOnInput() {
  2672.       this.title = (this.dataset.title || '').replace('$', this.value);
  2673.       if (this.elColor) this.elColor.oninput();
  2674.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2675.     }
  2676.     // range-edit
  2677.     function rangeEditOnBlur(e) {
  2678.       if (e.relatedTarget !== this.elRange) {
  2679.         this.remove();
  2680.         this.elRange.elEdit = null;
  2681.       }
  2682.     }
  2683.     function rangeEditOnInput() {
  2684.       this.elRange.valueAsNumber = this.valueAsNumber;
  2685.       this.elRange.oninput();
  2686.     }
  2687.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2688.     // which may happen since it sees only the outer <div> in the event |target|
  2689.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2690.   }
  2691.  
  2692.   function closeSetup(event) {
  2693.     const isApply = this.id === '_apply';
  2694.     if (event && (this.id === '_ok' || isApply)) {
  2695.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2696.       Ruler.init();
  2697.       if (isApply) {
  2698.         renderCustomScales();
  2699.         return;
  2700.       }
  2701.     }
  2702.     $remove(elConfig);
  2703.     elConfig = null;
  2704.   }
  2705.  
  2706.   function collectConfig({save, clone} = {}) {
  2707.     let data = {};
  2708.     for (const el of $$('input[id], select[id]', root))
  2709.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2710.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2711.           el.value || '';
  2712.     Object.assign(data, {
  2713.       css: UI.css.value.trim(),
  2714.       delay: UI.delay.valueAsNumber * 1000,
  2715.       hosts: collectRules(),
  2716.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2717.       scales: UI.scales.value
  2718.         .trim()
  2719.         .split(/[,;]*\s+/)
  2720.         .map(x => x.replace(',', '.'))
  2721.         .filter(x => !isNaN(parseFloat(x))),
  2722.     });
  2723.     if (clone)
  2724.       data = JSON.parse(Util.stringify(data));
  2725.     return new Config({data, save});
  2726.   }
  2727.  
  2728.   function collectRules() {
  2729.     return [...UI._rules.children]
  2730.       .map(el => [el.value.trim(), el[RULE]])
  2731.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2732.       .map(([s, json]) => json || s)
  2733.       .filter(Boolean);
  2734.   }
  2735.  
  2736.   function checkRule({target: el}) {
  2737.     let json, error, title;
  2738.     const prev = el.previousElementSibling;
  2739.     if (el.value) {
  2740.       json = Ruler.parse(el.value);
  2741.       error = json instanceof Error && (json.message || String(json));
  2742.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2743.         !/^[-.a-z0-9]*$/i.test(json.d);
  2744.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2745.         .filter(Boolean).join('\n');
  2746.       el.classList.toggle('invalid-domain', invalidDomain);
  2747.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  2748.       if (!prev)
  2749.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2750.     } else if (prev) {
  2751.       prev.focus();
  2752.       el.remove();
  2753.     }
  2754.     el[RULE] = !error && json;
  2755.     el.title = title;
  2756.     el.setCustomValidity(error || '');
  2757.   }
  2758.  
  2759.   function focusRule({type, target: el, relatedTarget: from}) {
  2760.     if (el === this)
  2761.       return;
  2762.     if (type === 'paste') {
  2763.       setTimeout(() => focusRule.call(this, {target: el}));
  2764.       return;
  2765.     }
  2766.     if (el[RULE])
  2767.       el.value = Ruler.format(el[RULE], {expand: true});
  2768.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2769.     if (h > el.offsetHeight)
  2770.       el.style.minHeight = h + 'px';
  2771.     if (!this.contains(from))
  2772.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2773.     if (from) {
  2774.       from.style.minHeight = '';
  2775.       if (from[RULE])
  2776.         from.value = Ruler.format(from[RULE]);
  2777.     }
  2778.   }
  2779.  
  2780.   function installRule(rule) {
  2781.     const inputs = UI._rules.children;
  2782.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2783.     if (!el) {
  2784.       el = inputs[0];
  2785.       el[RULE] = rule;
  2786.       el.value = Ruler.format(rule);
  2787.       el.hidden = false;
  2788.       const i = Math.max(0, collectRules().indexOf(rule));
  2789.       inputs[i].insertAdjacentElement('afterend', el);
  2790.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2791.     }
  2792.     const rect = el.getBoundingClientRect();
  2793.     if (rect.bottom < 0 ||
  2794.         rect.bottom > el.parentNode.offsetHeight)
  2795.       el.scrollIntoView();
  2796.     el.classList.add('highlight');
  2797.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2798.     el.focus();
  2799.   }
  2800.  
  2801.   function renderRules() {
  2802.     const rules = UI._rules;
  2803.     rules.addEventListener('input', checkRule);
  2804.     rules.addEventListener('focusin', focusRule);
  2805.     rules.addEventListener('paste', focusRule);
  2806.     blankRuleElement =
  2807.       setup.blankRuleElement =
  2808.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2809.     for (const rule of uiCfg.hosts || []) {
  2810.       const el = blankRuleElement.cloneNode();
  2811.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2812.       rules.appendChild(el);
  2813.       checkRule({target: el});
  2814.     }
  2815.     const search = UI._search;
  2816.     search.oninput = () => {
  2817.       setup.search = search.value;
  2818.       const s = search.value.toLowerCase();
  2819.       for (const el of rules.children)
  2820.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2821.     };
  2822.     search.value = setup.search || '';
  2823.     if (search.value)
  2824.       search.oninput();
  2825.   }
  2826.  
  2827.   function renderCustomScales() {
  2828.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2829.   }
  2830.  
  2831.   function renderAll() {
  2832.     for (const el of $$('input[id], select[id], textarea[id]', root))
  2833.       if (el.id in uiCfg)
  2834.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  2835.     for (const el of $$('input[type="range"]', root))
  2836.       el.oninput();
  2837.     for (const el of $$('a[href^="http"]', root))
  2838.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  2839.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  2840.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  2841.   }
  2842. }
  2843.  
  2844. function setupClickedRule(event) {
  2845.   const el = event.target.closest('blockquote, code, pre');
  2846.   const text = el && el.textContent.trim() || '';
  2847.   if (!event.button &&
  2848.       !eventModifiers(event) &&
  2849.       text.startsWith('{') &&
  2850.       text.endsWith('}') &&
  2851.       /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2852.     const rule = tryCatch(JSON.parse, text);
  2853.     if (Object.keys(rule).some(k => /^[degqrsu]$/.test(k))) {
  2854.       dropEvent(event);
  2855.       setup({rule});
  2856.     }
  2857.   }
  2858. }
  2859.  
  2860. async function setupRuleInstaller(e) {
  2861.   dropEvent(e);
  2862.   const parent = this.parentElement;
  2863.   parent.children._installLoading.hidden = false;
  2864.   this.remove();
  2865.   let rules;
  2866.  
  2867.   try {
  2868.     rules = extractRules(await Remoting.getDoc(this.href));
  2869.     const selector = $create('select', {
  2870.       size: 8,
  2871.       style: 'width: 100%',
  2872.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2873.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2874.     });
  2875.     selector.append(...rules.map(renderRule));
  2876.     selector.selectedIndex = findMatchingRuleIndex();
  2877.     // remove "name" since the installed rules don't need it
  2878.     for (const r of rules)
  2879.       delete r.name;
  2880.     parent.children._installLoading.remove();
  2881.     parent.children._installHint.hidden = false;
  2882.     parent.appendChild(selector);
  2883.     requestAnimationFrame(() => {
  2884.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  2885.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  2886.       selector.focus();
  2887.     });
  2888.   } catch (e) {
  2889.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2890.   }
  2891.  
  2892.   function extractRules({doc}) {
  2893.     const code = $('script', doc).textContent;
  2894.     // sort by name
  2895.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  2896.       .filter(r => !r.d || hostname.includes(r.d))
  2897.       .sort((a, b) =>
  2898.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  2899.           a > b ? 1 :
  2900.             0);
  2901.   }
  2902.  
  2903.   function findMatchingRuleIndex() {
  2904.     const dottedHost = `.${hostname}.`;
  2905.     let maxCount = 0, maxIndex = 0, index = 0;
  2906.     for (const {d, name} of rules) {
  2907.       let count = !!(d && hostname.includes(d)) * 10;
  2908.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  2909.         count += dottedHost.includes(`.${part}.`) && part.length;
  2910.       if (count > maxCount) {
  2911.         maxCount = count;
  2912.         maxIndex = index;
  2913.       }
  2914.       index++;
  2915.     }
  2916.     return maxIndex;
  2917.   }
  2918.  
  2919.   function renderRule(r) {
  2920.     const {name, ...copy} = r;
  2921.     return $create('option', {
  2922.       textContent: name,
  2923.       title: Ruler.format(copy, {expand: true})
  2924.         .replace(/^{|\s*}$/g, '')
  2925.         .split('\n')
  2926.         .slice(0, 12)
  2927.         .map(renderTitleLine)
  2928.         .filter(Boolean)
  2929.         .join('\n'),
  2930.     });
  2931.   }
  2932.  
  2933.   function renderTitleLine(line, i, arr) {
  2934.     return (
  2935.       // show ... on 10th line if there are more lines
  2936.       i === 9 && arr.length > 10 ? '...' :
  2937.         i > 10 ? '' :
  2938.           // truncate to 100 chars
  2939.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  2940.             // strip the leading space
  2941.             .replace(/^\s/, ''));
  2942.   }
  2943.  
  2944.   function maybeSetup(e) {
  2945.     if (!eventModifiers(e))
  2946.       setup({rule: rules[e.currentTarget.selectedIndex]});
  2947.   }
  2948. }
  2949.  
  2950. function createConfigHtml() {
  2951.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2952.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  2953.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  2954.   return flattenHtml(`
  2955. <style>
  2956.   :host {
  2957.     all: initial !important;
  2958.     position: fixed !important;
  2959.     z-index: 2147483647 !important;
  2960.     top: 20px !important;
  2961.     right: 20px !important;
  2962.     padding: 1.5em !important;
  2963.     color: #000 !important;
  2964.     background: #eee !important;
  2965.     box-shadow: 5px 5px 25px 2px #000 !important;
  2966.     width: 32em !important;
  2967.     border: 1px solid black !important;
  2968.     display: flex !important;
  2969.     flex-direction: column !important;
  2970.   }
  2971.   main {
  2972.     font: 12px/15px sans-serif;
  2973.   }
  2974.   ul {
  2975.     max-height: calc(100vh - 200px);
  2976.     margin: 10px 0 15px 0;
  2977.     padding: 0;
  2978.     list-style: none;
  2979.   }
  2980.   li {
  2981.     margin: 0;
  2982.     padding: .25em 0;
  2983.   }
  2984.   li.options {
  2985.     display: flex;
  2986.     align-items: center;
  2987.     justify-content: space-between;
  2988.   }
  2989.   li.row {
  2990.     flex-wrap: wrap;
  2991.     justify-content: flex-start;
  2992.   }
  2993.   li.row label {
  2994.     flex-direction: row;
  2995.     align-items: center;
  2996.   }
  2997.   li.row input {
  2998.     margin-right: .25em;
  2999.   }
  3000.   li.stretch label {
  3001.     flex: 1;
  3002.     white-space: nowrap;
  3003.   }
  3004.   li.stretch label > span {
  3005.     display: flex;
  3006.     flex-direction: row;
  3007.     flex: 1;
  3008.   }
  3009.   label {
  3010.     display: inline-flex;
  3011.     flex-direction: column;
  3012.   }
  3013.   label:not(:last-child) {
  3014.     margin-right: 1em;
  3015.   }
  3016.   input, select {
  3017.     min-height: 1.6em;
  3018.     box-sizing: border-box;
  3019.   }
  3020.   input[type=checkbox] {
  3021.     margin-left: 0;
  3022.   }
  3023.   input[type=number] {
  3024.     width: 4em;
  3025.   }
  3026.   input:not([type=checkbox])  {
  3027.     padding: 0 .25em;
  3028.   }
  3029.   input[type=range] {
  3030.     flex: 1;
  3031.     width: 100%;
  3032.     margin: 0 .25em;
  3033.     padding: 0;
  3034.     filter: saturate(0);
  3035.     opacity: .5;
  3036.   }
  3037.   u + input[type=range] {
  3038.     max-width: 3em;
  3039.   }
  3040.   input[type=range]:hover {
  3041.     filter: none;
  3042.     opacity: 1;
  3043.   }
  3044.   input[type=color] {
  3045.     position: absolute;
  3046.     width: calc(1.5em + 2px);
  3047.     opacity: 0;
  3048.     cursor: pointer;
  3049.   }
  3050.   u {
  3051.     display: inline-block;
  3052.     position: relative;
  3053.     width: 1.5em;
  3054.     height: 1.5em;
  3055.     border: 1px solid #888;
  3056.     pointer-events: none;
  3057.     color: #888;
  3058.     background-image:
  3059.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3060.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3061.     background-size: .5em .5em;
  3062.     background-position: 0 0, .25em .25em;
  3063.   }
  3064.   u::after {
  3065.     position: absolute;
  3066.     top: 0;
  3067.     left: 0;
  3068.     right: 0;
  3069.     bottom: 0;
  3070.     content: "";
  3071.     background-color: var(--color);
  3072.   }
  3073.   .range-edit {
  3074.     position: absolute;
  3075.     box-shadow: 0 0.25em 1em #000;
  3076.     z-index: 99;
  3077.   }
  3078.   #_rules input,
  3079.   textarea {
  3080.     flex: 1;
  3081.     resize: vertical;
  3082.     margin: 1px 0;
  3083.     font: 11px/1.25 Consolas, monospace;
  3084.   }
  3085.   :invalid {
  3086.     background-color: #f002;
  3087.     border-color: #800;
  3088.   }
  3089.   code {
  3090.     font-weight: bold;
  3091.   }
  3092.   a {
  3093.     text-decoration: none;
  3094.   }
  3095.   a:hover {
  3096.     text-decoration: underline;
  3097.   }
  3098.   button {
  3099.     padding: .2em 1em;
  3100.     margin: 0 1em;
  3101.   }
  3102.   kbd {
  3103.     padding: 1px 6px;
  3104.     font-weight: bold;
  3105.     font-family: Consolas, monospace;
  3106.     border: 1px solid #888;
  3107.     border-radius: 3px;
  3108.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3109.   }
  3110.   .column {
  3111.     display: flex;
  3112.     flex-direction: column;
  3113.   }
  3114.   .highlight {
  3115.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3116.     animation-fill-mode: both;
  3117.   }
  3118.   #_rules > * {
  3119.     word-break: break-all;
  3120.   }
  3121.   #_rules > :not(:focus) {
  3122.     overflow: hidden; /* prevents wrapping in FF */
  3123.   }
  3124.   .invalid-domain {
  3125.     opacity: .5;
  3126.   }
  3127.   .matching-domain {
  3128.     border-color: #56b8ff;
  3129.     background: #d7eaff;
  3130.   }
  3131.   #_x {
  3132.     position: absolute;
  3133.     top: 0;
  3134.     right: 0;
  3135.     padding: 4px 8px;
  3136.     cursor: pointer;
  3137.     user-select: none;
  3138.   }
  3139.   #_x:hover {
  3140.     background-color: #8884;
  3141.   }
  3142.   #_cssApp {
  3143.     color: seagreen;
  3144.   }
  3145.   #_exportNotification {
  3146.     color: green;
  3147.     font-weight: bold;
  3148.     position: absolute;
  3149.     left: 0;
  3150.     right: 0;
  3151.     bottom: 2px;
  3152.   }
  3153.   #_installHint {
  3154.     color: green;
  3155.   }
  3156.   @keyframes fade-in {
  3157.     from { background-color: deepskyblue }
  3158.     to {}
  3159.   }
  3160.   @media (prefers-color-scheme: dark) {
  3161.     :host {
  3162.       color: #aaa !important;
  3163.       background: #333 !important;
  3164.     }
  3165.     a {
  3166.       color: deepskyblue;
  3167.     }
  3168.     button {
  3169.       background: linear-gradient(-5deg, #333, #555);
  3170.       border: 1px solid #000;
  3171.       box-shadow: 0 2px 6px #181818;
  3172.       border-radius: 3px;
  3173.       cursor: pointer;
  3174.     }
  3175.     button:hover {
  3176.       background: linear-gradient(-5deg, #333, #666);
  3177.     }
  3178.     textarea, input, select {
  3179.       background: #111;
  3180.       color: #BBB;
  3181.       border: 1px solid #555;
  3182.     }
  3183.     input[type=checkbox] {
  3184.       filter: invert(1);
  3185.     }
  3186.     input[type=range] {
  3187.       filter: invert(1) saturate(0);
  3188.     }
  3189.     input[type=range]:hover {
  3190.       filter: invert(1);
  3191.     }
  3192.     kbd {
  3193.       border-color: #666;
  3194.     }
  3195.     @supports (-moz-appearance: none) {
  3196.       input[type=checkbox],
  3197.       input[type=range],
  3198.       input[type=range]:hover {
  3199.         filter: none;
  3200.       }
  3201.     }
  3202.     .range-edit {
  3203.       box-shadow: 0 .5em 1em .5em #000;
  3204.     }
  3205.     .matching-domain {
  3206.       border-color: #0065af;
  3207.       background: #032b58;
  3208.       color: #ddd;
  3209.     }
  3210.     #_cssApp {
  3211.       color: darkseagreen;
  3212.     }
  3213.     #_installHint {
  3214.       color: greenyellow;
  3215.     }
  3216.     ::-webkit-scrollbar {
  3217.       width: 14px;
  3218.       height: 14px;
  3219.       background: #333;
  3220.     }
  3221.     ::-webkit-scrollbar-button:single-button {
  3222.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3223.     }
  3224.     ::-webkit-scrollbar-track-piece {
  3225.       background: #444;
  3226.       border: 4px solid #333;
  3227.       border-radius: 8px;
  3228.     }
  3229.     ::-webkit-scrollbar-thumb {
  3230.       border: 3px solid #333;
  3231.       border-radius: 8px;
  3232.       background: #666;
  3233.     }
  3234.     ::-webkit-resizer {
  3235.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3236.       border: 2px solid transparent;
  3237.     }
  3238.   }
  3239. </style>
  3240. <main>
  3241.   <div id=_x>x</div>
  3242.   <ul class=column>
  3243.     <details style="margin: -2em 0 1em">
  3244.       <summary style="cursor:pointer"><b>Click to view help & hotkeys</b></summary>
  3245.       <table style="text-align:left">
  3246.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3247.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3248.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3249.         <tr><th>Force-activate<br>(for small pics)</th>
  3250.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3251.         <tr><td>&nbsp;</td></tr>
  3252.         <tr><th>Start zooming</th>
  3253.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3254.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3255.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3256.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3257.         <tr><th>Previous/next<br>in album</th>
  3258.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3259.         <tr><td>&nbsp;</td></tr>
  3260.         <tr><th>Download</th><td><kbd>d</kbd> key while popup is visible</td></tr>
  3261.         <tr><th>Mute/unmute</th><td><kbd>m</kbd> key while popup is visible</td></tr>
  3262.         <tr><th>Open in tab</th><td><kbd>t</kbd> key while popup is visible</td></tr>
  3263.       </table>
  3264.     </details>
  3265.     <li class=options>
  3266.       <label>Popup shows on
  3267.         <select id=start>
  3268.           <option value=auto>automatically
  3269.           <option value=context>Right click / Ctrl
  3270.           <option value=ctrl>Ctrl
  3271.         </select>
  3272.       </label>
  3273.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3274.       <label title="(if the full version of the hovered image is ...% larger)">
  3275.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3276.       </label>
  3277.       <label>Zoom activates on
  3278.         <select id=zoom>
  3279.           <option value=context>Right click / Shift
  3280.           <option value=wheel>Wheel up / Shift
  3281.           <option value=shift>Shift
  3282.           <option value=auto>automatically
  3283.         </select>
  3284.       </label>
  3285.       <label>...and zooms to
  3286.         <select id=fit>
  3287.           <option value=all>fit to window
  3288.           <option value=large>fit if larger
  3289.           <option value=no>100%
  3290.           <option value="" title="Use custom scale factors">custom
  3291.         </select>
  3292.       </label>
  3293.     </li>
  3294.     <li class=options>
  3295.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3296.       </label>
  3297.       <label>When fully zoomed out:
  3298.         <select id=zoomOut>
  3299.           <option value=stay>stay in zoom mode
  3300.           <option value=auto>stay if still hovered
  3301.           <option value=unzoom>undo zoom mode
  3302.           <option value=close>close popup
  3303.         </select>
  3304.       </label>
  3305.       <label style="flex: 1" title="${trimLeft(`
  3306.         Scale factors to use when “zooms to” selector is set to “custom”.
  3307.         0 = fit to window,
  3308.         0! = same as 0 but also removes smaller values,
  3309.         * after a value marks the default zoom factor, for example: 1*
  3310.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3311.         ${scalesHint}
  3312.       `)}">Custom scale factors:
  3313.         <input id=scales placeholder="${scalesHint}">
  3314.       </label>
  3315.     </li>
  3316.     <li class="options row">
  3317.       <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3318.         <input type=checkbox id=center>Centered*</label>
  3319.       <label title="Provides smoother experience but increases network traffic">
  3320.         <input type=checkbox id=preload>Preload on hover*</label>
  3321.       <label title="...or show a partial image while still loading">
  3322.         <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3323.       <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3324.       <label><input type=checkbox id=mute>Mute videos</label>
  3325.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3326.       <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3327.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt;*</label>
  3328.       <label title="Disable only if you spoof the HTTP headers yourself">
  3329.         <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3330.     </li>
  3331.     <li class="options stretch">
  3332.       <label>Background
  3333.         <span>
  3334.           <input id=uiBackgroundColor type=color><u></u>
  3335.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3336.         </span>
  3337.       </label>
  3338.       <label>Border color, opacity, size
  3339.         <span>
  3340.           <input id=uiBorderColor type=color><u></u>
  3341.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3342.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3343.         </span>
  3344.       </label>
  3345.       <label>Shadow color, opacity, size
  3346.         <span>
  3347.           <input id=uiShadowColor type=color><u></u>
  3348.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3349.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3350.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3351.         </span>
  3352.       </label>
  3353.       <label>Padding
  3354.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3355.       </label>
  3356.       <label>Margin
  3357.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3358.       </label>
  3359.     </li>
  3360.     <li>
  3361.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3362.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3363.       <a href="#" id=_reveal style="float: right"
  3364.          title="You can copy parts of it to override them in your custom CSS">
  3365.          View the built-in CSS</a>
  3366.       <div class=column>
  3367.         <textarea id=css spellcheck=false></textarea>
  3368.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3369.       </div>
  3370.     </li>
  3371.     <li style="display: flex; justify-content: space-between;">
  3372.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3373.       <div style="white-space: nowrap">
  3374.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3375.         in "d" value, for example <code>"d": "!foo.com"</code>
  3376.       </div>
  3377.       <div>
  3378.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3379.       </div>
  3380.     </li>
  3381.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3382.       <div id=_rules class=column>
  3383.         <textarea rows=1 spellcheck=false></textarea>
  3384.       </div>
  3385.     </li>
  3386.     <li>
  3387.       <div hidden id=_installLoading>Loading...</div>
  3388.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3389.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3390.       <a href="${MPIV_BASE_URL}more_host_rules.html" id=_install>Install rule from repository...</a>
  3391.     </li>
  3392.   </ul>
  3393.   <div style="text-align:center">
  3394.     <button id=_ok accesskey=s>OK</button>
  3395.     <button id=_apply accesskey=a>Apply</button>
  3396.     <button id=_import style="margin-right: 0">Import</button>
  3397.     <button id=_export style="margin-left: 0">Export</button>
  3398.     <button id=_cancel>Cancel</button>
  3399.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3400.   </div>
  3401. </main>`);
  3402. }
  3403.  
  3404. function createGlobalStyle() {
  3405.   App.globalStyle = /*language=CSS*/ (String.raw`
  3406. #\mpiv-bar {
  3407.   position: fixed;
  3408.   z-index: 2147483647;
  3409.   top: 0;
  3410.   left: 0;
  3411.   right: 0;
  3412.   opacity: 0;
  3413.   transition: opacity 1s ease .25s;
  3414.   text-align: center;
  3415.   font-family: sans-serif;
  3416.   font-size: 15px;
  3417.   font-weight: bold;
  3418.   background: #0005;
  3419.   color: white;
  3420.   padding: 4px 10px;
  3421.   text-shadow: .5px .5px 2px #000;
  3422. }
  3423. #\mpiv-bar.\mpiv-show {
  3424.   opacity: 1;
  3425. }
  3426. #\mpiv-bar[data-zoom]::after {
  3427.   content: " (" attr(data-zoom) ")";
  3428.   opacity: .8;
  3429. }
  3430. #\mpiv-popup.\mpiv-show {
  3431.   display: inline;
  3432. }
  3433. #\mpiv-popup {
  3434.   display: none;
  3435.   cursor: none;
  3436. ${cfg.uiFadein ? String.raw`
  3437.   animation: .2s \mpiv-fadein both;
  3438.   transition: box-shadow .25s, background-color .25s;
  3439.   ` : ''}
  3440. ${App.popupStyleBase = `
  3441.   border: none;
  3442.   box-sizing: border-box;
  3443.   position: fixed;
  3444.   z-index: 2147483647;
  3445.   padding: 0;
  3446.   margin: 0;
  3447.   top: 0;
  3448.   left: 0;
  3449.   width: auto;
  3450.   height: auto;
  3451.   transform-origin: center;
  3452.   max-width: none;
  3453.   max-height: none;
  3454. `}
  3455. }
  3456. #\mpiv-popup.\mpiv-show {
  3457.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3458.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3459.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3460.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3461. }
  3462. #\mpiv-popup.\mpiv-show[loaded] {
  3463.   background-color: ${Util.color('Background')};
  3464.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3465. }
  3466. #\mpiv-popup.\mpiv-zoom-max {
  3467.   image-rendering: pixelated;
  3468. }
  3469. @keyframes \mpiv-fadein {
  3470.   from {
  3471.     opacity: 0;
  3472.     border-color: transparent;
  3473.   }
  3474.   to {
  3475.     opacity: 1;
  3476.   }
  3477. }
  3478. ` + (cfg.globalStatus ? String.raw`
  3479. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3480.   cursor: progress !important;
  3481. }
  3482. :root.\mpiv-edge #\mpiv-popup {
  3483.   cursor: default;
  3484. }
  3485. :root.\mpiv-error *:hover {
  3486.   cursor: not-allowed !important;
  3487. }
  3488. :root.\mpiv-ready *:hover,
  3489. :root.\mpiv-large *:hover {
  3490.   cursor: zoom-in !important;
  3491. }
  3492. :root.\mpiv-shift *:hover {
  3493.   cursor: default !important;
  3494. }
  3495. ` : String.raw`
  3496. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3497.   cursor: progress;
  3498. }
  3499. [\mpiv-status~="edge"]:hover {
  3500.   cursor: default;
  3501. }
  3502. [\mpiv-status~="error"]:hover {
  3503.   cursor: not-allowed;
  3504. }
  3505. [\mpiv-status~="ready"]:hover,
  3506. [\mpiv-status~="large"]:hover {
  3507.   cursor: zoom-in;
  3508. }
  3509. [\mpiv-status~="shift"]:hover {
  3510.   cursor: default;
  3511. }
  3512. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3513.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3514.   return App.globalStyle;
  3515. }
  3516.  
  3517. //#region Global utilities
  3518.  
  3519. const clamp = (v, min, max) =>
  3520.   v < min ? min : v > max ? max : v;
  3521.  
  3522. const compareNumbers = (a, b) =>
  3523.   a - b;
  3524.  
  3525. const flattenHtml = str =>
  3526.   str.trim().replace(/\n\s*/g, '');
  3527.  
  3528. const dropEvent = e =>
  3529.   (e.preventDefault(), e.stopPropagation());
  3530.  
  3531. const ensureArray = v =>
  3532.   Array.isArray(v) ? v : [v];
  3533.  
  3534. /** @param {KeyboardEvent} e */
  3535. const eventModifiers = e =>
  3536.   (e.altKey ? '!' : '') +
  3537.   (e.ctrlKey ? '^' : '') +
  3538.   (e.metaKey ? '#' : '') +
  3539.   (e.shiftKey ? '+' : '');
  3540.  
  3541. const now = performance.now.bind(performance);
  3542.  
  3543. const sumProps = (...props) => {
  3544.   let sum = 0;
  3545.   for (const p of props)
  3546.     sum += parseFloat(p) || 0;
  3547.   return sum;
  3548. };
  3549.  
  3550. const tryCatch = function (fn, ...args) {
  3551.   try {
  3552.     return fn.apply(this, args);
  3553.   } catch (e) {}
  3554. };
  3555.  
  3556. const $ = (sel, node = doc) =>
  3557.   node.querySelector(sel) || false;
  3558.  
  3559. const $$ = (sel, node = doc) =>
  3560.   node.querySelectorAll(sel);
  3561.  
  3562. const $create = (tag, props) =>
  3563.   Object.assign(doc.createElement(tag), props);
  3564.  
  3565. const $css = (el, props) =>
  3566.   Object.entries(props).forEach(([k, v]) =>
  3567.     el.style.setProperty(k, v, 'important'));
  3568.  
  3569. const $many = (q, doc) => {
  3570.   for (const selector of ensureArray(q)) {
  3571.     const el = selector && $(selector, doc);
  3572.     if (el)
  3573.       return el;
  3574.   }
  3575. };
  3576.  
  3577. const $prop = (sel, prop, node = doc) =>
  3578.   (node = $(sel, node)) && node[prop] || '';
  3579.  
  3580. const $propUp = (node, prop) =>
  3581.   (node = node.closest(`[${prop}]`)) &&
  3582.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3583.   '';
  3584.  
  3585. const $remove = node =>
  3586.   node && node.remove();
  3587.  
  3588. //#endregion
  3589. //#region Init
  3590.  
  3591. cfg = new Config({save: true});
  3592.  
  3593. if (window === top)
  3594.   GM_registerMenuCommand('MPIV: configure', setup);
  3595.  
  3596. if (doc.body) App.checkImageTab();
  3597. else doc.addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3598.  
  3599. doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3600. if (['greasyfork.org', 'w9p.co', 'github.com'].includes(hostname))
  3601.   doc.addEventListener('click', setupClickedRule, {passive: true});
  3602. window.addEventListener('message', App.onMessage);
  3603.  
  3604. //#endregion