☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-01-27 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
  10. // @connect     github.com
  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     1.1.20
  21. // @author      tophf
  22. //
  23. // @original-version 2017.9.29
  24. // @original-author  kuehlschrank
  25. //
  26. // @supportURL  https://github.com/tophf/mpiv/issues
  27. // @icon        https://github.com/tophf/mpiv/raw/master/icon.png
  28. // ==/UserScript==
  29.  
  30. 'use strict';
  31.  
  32. //#region Globals
  33.  
  34. /** @type mpiv.Config */
  35. let cfg;
  36. /** @type mpiv.AppInfo */
  37. let ai = {rule: {}};
  38. /** @type Element */
  39. let elConfig;
  40.  
  41. const doc = document;
  42. const hostname = location.hostname;
  43. const dotDomain = '.' + hostname;
  44. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  45. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  46. const isFF = CSS.supports('-moz-appearance', 'none');
  47. const AudioContext = window.AudioContext || function () {};
  48.  
  49. const PREFIX = 'mpiv-';
  50. const STATUS_ATTR = `${PREFIX}status`;
  51. const MSG = Object.assign({}, ...[
  52.   'getViewSize',
  53.   'viewSize',
  54. ].map(k => ({[k]: `${PREFIX}${k}`})));
  55. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  56. // time for volatile things to settle down meanwhile we postpone action
  57. // examples: loading image from cache, quickly moving mouse over one element to another
  58. const SETTLE_TIME = 50;
  59. // used to detect JS code in host rules
  60. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  61. const RX_MEDIA_URL = /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i;
  62. const ZOOM_MAX = 16;
  63. const SYM_U = Symbol('u');
  64.  
  65. //#endregion
  66.  
  67. const App = {
  68.  
  69.   isEnabled: true,
  70.   isImageTab: false,
  71.   globalStyle: '',
  72.   popupStyleBase: '',
  73.  
  74.   activate(info, event) {
  75.     const {match, node, rule, url} = info;
  76.     if (elConfig) console.info({node, rule, url, match});
  77.     if (ai.node) App.deactivate();
  78.     ai = info;
  79.     ai.force = event.ctrlKey;
  80.     ai.gNum = 0;
  81.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  82.     Util.suppressTooltip();
  83.     Calc.updateViewSize();
  84.     Events.toggle(true);
  85.     Events.trackMouse(event);
  86.     if (CspSniffer.init && location.protocol === 'https:')
  87.       CspSniffer.init();
  88.     if (ai.force) {
  89.       App.start();
  90.     } else if (cfg.start === 'auto' && !rule.manual) {
  91.       App.belate();
  92.     } else {
  93.       Status.set('ready');
  94.     }
  95.   },
  96.  
  97.   belate() {
  98.     if (cfg.preload) {
  99.       ai.preloadStart = now();
  100.       App.start();
  101.       Status.set('+preloading');
  102.       setTimeout(Status.set, cfg.delay, '-preloading');
  103.     } else {
  104.       ai.timer = setTimeout(App.start, cfg.delay);
  105.     }
  106.   },
  107.  
  108.   checkImageTab() {
  109.     const el = doc.body.firstElementChild;
  110.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  111.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  112.   },
  113.  
  114.   checkProgress({start} = {}) {
  115.     const p = ai.popup;
  116.     if (!p)
  117.       return;
  118.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  119.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  120.     if (h)
  121.       return App.canCommit(w, h);
  122.     if (start) {
  123.       clearInterval(ai.timerProgress);
  124.       ai.timerProgress = setInterval(App.checkProgress, 150);
  125.     }
  126.   },
  127.  
  128.   canCommit(w, h) {
  129.     if (!ai.force && ai.rect && !ai.gItems &&
  130.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  131.       App.deactivate();
  132.       return false;
  133.     }
  134.     App.stopTimers();
  135.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  136.     if (wait > 0) {
  137.       ai.timer = setTimeout(App.checkProgress, wait);
  138.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  139.       App.handleError({type: 'error'});
  140.     } else {
  141.       App.commit();
  142.     }
  143.     return true;
  144.   },
  145.  
  146.   async commit() {
  147.     const p = ai.popup;
  148.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  149.     if (isDecoded) {
  150.       await p.decode();
  151.       if (p !== ai.popup)
  152.         return;
  153.     }
  154.     App.updateStyles();
  155.     Calc.measurePopup();
  156.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  157.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  158.     if (willMove)
  159.       Popup.move();
  160.     Bar.updateName();
  161.     Bar.updateDetails();
  162.     Status.set(!ai.popupLoaded && 'loading');
  163.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  164.                ai.nheight > p.clientHeight + ai.extras.h;
  165.     if (ai.large) {
  166.       Status.set('+large');
  167.       // prevent a blank bg+border in FF
  168.       if (isFF && p.complete && !isDecoded)
  169.         p.style.backgroundImage = `url('${p.src}')`;
  170.     }
  171.   },
  172.  
  173.   deactivate({wait} = {}) {
  174.     App.stopTimers();
  175.     if (ai.req)
  176.       tryCatch.call(ai.req, ai.req.abort);
  177.     if (ai.tooltip)
  178.       ai.tooltip.node.title = ai.tooltip.text;
  179.     Status.set(false);
  180.     Bar.set(false);
  181.     Events.toggle(false);
  182.     Popup.destroy();
  183.     if (wait) {
  184.       App.isEnabled = false;
  185.       setTimeout(App.enable, 200);
  186.     }
  187.     ai = {rule: {}};
  188.   },
  189.  
  190.   enable() {
  191.     App.isEnabled = true;
  192.   },
  193.  
  194.   handleError(e, rule = ai.rule) {
  195.     if (rule && rule.onerror === 'skip')
  196.       return;
  197.     const fe = Util.formatError(e, rule);
  198.     if (!rule || !ai.urls || !ai.urls.length)
  199.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  200.     if (ai.urls && ai.urls.length) {
  201.       ai.url = ai.urls.shift();
  202.       if (ai.url) {
  203.         App.stopTimers();
  204.         App.startSingle();
  205.       } else {
  206.         App.deactivate();
  207.       }
  208.     } else if (ai.node) {
  209.       Status.set('error');
  210.       Bar.set(fe.message, 'error');
  211.     }
  212.   },
  213.  
  214.   /** @param {MessageEvent} e */
  215.   onMessage(e) {
  216.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  217.       for (const el of doc.getElementsByTagName('iframe')) {
  218.         if (el.contentWindow === e.source) {
  219.           const [w, h] = Calc.frameSize(el, window);
  220.           e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  221.           return;
  222.         }
  223.       }
  224.     }
  225.   },
  226.  
  227.   /** @param {MessageEvent} e */
  228.   onMessageChild(e) {
  229.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  230.       window.removeEventListener('message', App.onMessageChild);
  231.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  232.       if (w && h) ai.view = {w, h};
  233.     }
  234.   },
  235.  
  236.   start() {
  237.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  238.     if (!Util.isHovered(ai.node)) {
  239.       App.deactivate();
  240.       return;
  241.     }
  242.     App.updateStyles();
  243.     if (ai.gallery)
  244.       App.startGallery();
  245.     else
  246.       App.startSingle();
  247.   },
  248.  
  249.   startSingle() {
  250.     Status.loading();
  251.     ai.imageUrl = null;
  252.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  253.       Remoting.findRedirect();
  254.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  255.       App.startFromQ();
  256.     } else {
  257.       Popup.create(ai.url);
  258.       Ruler.runC();
  259.     }
  260.   },
  261.  
  262.   async startFromQ() {
  263.     try {
  264.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  265.       const url = Ruler.runQ(responseText, doc, finalUrl);
  266.       if (!url)
  267.         throw 'The "q" rule did not produce any URL.';
  268.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  269.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  270.         if (!info || !info.url)
  271.           throw `Couldn't follow URL: ${url}`;
  272.         Object.assign(ai, info);
  273.         App.startSingle();
  274.       } else {
  275.         Popup.create(url, finalUrl);
  276.         Ruler.runC(responseText, doc);
  277.       }
  278.     } catch (e) {
  279.       App.handleError(e);
  280.     }
  281.   },
  282.  
  283.   async startGallery() {
  284.     Status.loading();
  285.     try {
  286.       const startUrl = ai.url;
  287.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  288.       const items = await new Promise(resolve => {
  289.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  290.           resolve);
  291.         if (Array.isArray(it))
  292.           resolve(it);
  293.       });
  294.       // bail out if the gallery's async callback took too long
  295.       if (ai.url !== startUrl) return;
  296.       ai.gNum = items.length;
  297.       ai.gItems = items.length && items;
  298.       if (ai.gItems) {
  299.         const i = items.index;
  300.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  301.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  302.             Gallery.findIndex(ai.url);
  303.         setTimeout(Gallery.next);
  304.       } else {
  305.         throw 'Empty gallery';
  306.       }
  307.     } catch (e) {
  308.       App.handleError(e);
  309.     }
  310.   },
  311.  
  312.   stopTimers() {
  313.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  314.       clearTimeout(ai[timer]);
  315.     clearInterval(ai.timerProgress);
  316.   },
  317.  
  318.   toggleZoom({keepScale} = {}) {
  319.     const p = ai.popup;
  320.     if (!p || !ai.scales || ai.scales.length < 2)
  321.       return;
  322.     ai.zoomed = !ai.zoomed;
  323.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  324.     if (ai.zooming)
  325.       p.classList.add(`${PREFIX}zooming`);
  326.     Popup.move();
  327.     Bar.updateDetails();
  328.     Status.set(ai.zoomed ? 'zoom' : false);
  329.     return ai.zoomed;
  330.   },
  331.  
  332.   updateStyles() {
  333.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  334.     Util.addStyle('rule', ai.rule.css || '');
  335.   },
  336. };
  337.  
  338. const Bar = {
  339.  
  340.   set(label, className) {
  341.     let b = ai.bar;
  342.     if (typeof label !== 'string') {
  343.       $remove(b);
  344.       ai.bar = null;
  345.       return;
  346.     }
  347.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  348.     App.updateStyles();
  349.     Bar.updateDetails();
  350.     Bar.show();
  351.     b.innerHTML = label;
  352.     if (!b.parentNode) {
  353.       doc.body.appendChild(b);
  354.       Util.forceLayout(b);
  355.     }
  356.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  357.   },
  358.  
  359.   show() {
  360.     clearTimeout(ai.timerBar);
  361.     ai.bar.style.removeProperty('opacity');
  362.     ai.timerBar = setTimeout(() => ai.bar && $css(ai.bar, {opacity: 0}), 3000);
  363.   },
  364.  
  365.   updateName() {
  366.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  367.     if (gi) {
  368.       const item = gi[i];
  369.       const noDesc = !gi.some(_ => _.desc);
  370.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  371.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  372.         item.desc,
  373.       ].filter(Boolean).join(' - ')}`;
  374.       Bar.set(c.trim() || ' ', 'gallery', true);
  375.     } else if ('caption' in ai) {
  376.       Bar.set(ai.caption, 'caption');
  377.     } else if (ai.tooltip) {
  378.       Bar.set(ai.tooltip.text, 'tooltip');
  379.     } else {
  380.       Bar.set(' ', 'info');
  381.     }
  382.   },
  383.  
  384.   updateDetails() {
  385.     if (!ai.bar) return;
  386.     const r = ai.rotate;
  387.     const zoom = ai.nwidth && `${
  388.       Math.round(ai.scale * 100)
  389.     }%${
  390.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  391.     }${
  392.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  393.     }, ${
  394.       ai.nwidth
  395.     } x ${
  396.       ai.nheight
  397.     } px, ${
  398.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  399.     } MP`.replace(/\x20/g, '\xA0');
  400.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  401.       if (zoom) ai.bar.dataset.zoom = zoom;
  402.       else delete ai.bar.dataset.zoom;
  403.       Bar.show();
  404.     }
  405.   },
  406. };
  407.  
  408. const Calc = {
  409.  
  410.   frameSize(elFrame, parentWindow) {
  411.     if (!elFrame) return;
  412.     const r = elFrame.getBoundingClientRect();
  413.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  414.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  415.     return [w, h];
  416.   },
  417.  
  418.   generateScales(fit) {
  419.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  420.     const zoomStep = cfg.zoomStep / 100;
  421.     const arr = [scale];
  422.     if (fit !== 1) {
  423.       const diff = goal / scale;
  424.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  425.       const step = steps && Math.pow(diff, 1 / steps);
  426.       for (let i = steps; --i > 0;)
  427.         arr.push((scale *= step));
  428.       arr.push(scale = goal);
  429.     }
  430.     while ((scale *= zoomStep) <= ZOOM_MAX)
  431.       arr.push(scale);
  432.     return arr;
  433.   },
  434.  
  435.   measurePopup() {
  436.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  437.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  438.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  439.     if (p.clientWidth > nw) {
  440.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  441.       nh = ai.nheight = w / nw * nh | 0;
  442.       nw = ai.nwidth = w;
  443.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  444.     }
  445.     p.className = `${PREFIX}show`;
  446.     p.removeAttribute('style');
  447.     const s = getComputedStyle(p);
  448.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  449.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  450.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  451.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  452.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  453.     ai.extras = {
  454.       inw, inh,
  455.       outw, outh,
  456.       o: o2 / 2,
  457.       w: inw + outw,
  458.       h: inh + outh,
  459.     };
  460.     const fit = Math.min(
  461.       (ai.view.w - ai.extras.w) / ai.nwidth,
  462.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  463.     const isCustom = !cfg.fit && cfg.scales.length;
  464.     let cutoff = Math.min(1, fit);
  465.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  466.     if (isCustom) {
  467.       const dst = [];
  468.       for (const scale of cfg.scales) {
  469.         const val = parseFloat(scale) || fit;
  470.         dst.push(val);
  471.         if (isCustom && typeof scale === 'string') {
  472.           if (scale.includes('!')) cutoff = val;
  473.           if (scale.includes('*')) scaleZoom = val;
  474.         }
  475.       }
  476.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  477.     } else {
  478.       ai.scales = Calc.generateScales(fit);
  479.     }
  480.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  481.     ai.scaleFit = fit;
  482.     ai.scaleZoom = scaleZoom;
  483.   },
  484.  
  485.   rect() {
  486.     let {node, rule} = ai;
  487.     let n = rule.rect && node.closest(rule.rect);
  488.     if (n) return n.getBoundingClientRect();
  489.     const nested = node.getElementsByTagName('*');
  490.     let maxArea = 0;
  491.     let maxBounds;
  492.     n = node;
  493.     for (let i = 0; n; n = nested[i++]) {
  494.       const bounds = n.getBoundingClientRect();
  495.       const area = bounds.width * bounds.height;
  496.       if (area > maxArea) {
  497.         maxArea = area;
  498.         maxBounds = bounds;
  499.         node = n;
  500.       }
  501.     }
  502.     return maxBounds;
  503.   },
  504.  
  505.   scaleBiggerThan(scale, i, arr) {
  506.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  507.   },
  508.  
  509.   scaleIndex(dir) {
  510.     const i = ai.scales.indexOf(ai.scale);
  511.     if (i >= 0) return i + dir;
  512.     for (
  513.       let len = ai.scales.length,
  514.         i = dir > 0 ? 0 : len - 1;
  515.       i >= 0 && i < len;
  516.       i += dir
  517.     ) {
  518.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  519.         return i;
  520.     }
  521.     return -1;
  522.   },
  523.  
  524.   scaleForFirstZoom(keepScale) {
  525.     const z = ai.scaleZoom;
  526.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  527.   },
  528.  
  529.   updateViewSize() {
  530.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  531.     ai.view = {
  532.       w: view.clientWidth,
  533.       h: view.clientHeight,
  534.     };
  535.     if (window === top) return;
  536.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  537.     if (w && h) {
  538.       ai.view = {w, h};
  539.     } else {
  540.       window.addEventListener('message', App.onMessageChild);
  541.       parent.postMessage(MSG.getViewSize, '*');
  542.     }
  543.   },
  544. };
  545.  
  546. /** @namespace mpiv.Config */
  547. class Config {
  548.  
  549.   constructor({data: c = GM_getValue('cfg'), save}) {
  550.     if (typeof c === 'string')
  551.       c = tryCatch(JSON.parse, c);
  552.     if (typeof c !== 'object' || !c)
  553.       c = {};
  554.     const {/** @type mpiv.Config */ DEFAULTS} = Config;
  555.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  556.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  557.         '';
  558.     if (c.version !== DEFAULTS.version) {
  559.       if (typeof c.hosts === 'string')
  560.         c.hosts = c.hosts.split('\n')
  561.           .map(s => tryCatch(JSON.parse, s) || s)
  562.           .filter(Boolean);
  563.       if (c.close === true || c.close === false)
  564.         c.zoomOut = c.close ? 'auto' : 'stay';
  565.       for (const key in DEFAULTS)
  566.         if (typeof c[key] !== typeof DEFAULTS[key])
  567.           c[key] = DEFAULTS[key];
  568.       if (c.version === 3 && c.scales[0] === 0)
  569.         c.scales[0] = '0!';
  570.       for (const key in c)
  571.         if (!(key in DEFAULTS))
  572.           delete c[key];
  573.       c.version = DEFAULTS.version;
  574.       if (save)
  575.         GM_setValue('cfg', c);
  576.     }
  577.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  578.       App.globalStyle = '';
  579.     if (!Array.isArray(c.scales))
  580.       c.scales = [];
  581.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  582.     Object.assign(this, DEFAULTS, c);
  583.   }
  584.  
  585.   _getCss() {
  586.     const {css} = this;
  587.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  588.   }
  589. }
  590.  
  591. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  592.   center: false,
  593.   css: '',
  594.   delay: 500,
  595.   fit: '',
  596.   globalStatus: false,
  597.   // prefer ' inside rules because " will be displayed as \"
  598.   // example: "img[src*='icon']"
  599.   hosts: [{
  600.     name: 'No popup for YouTube thumbnails',
  601.     d: 'www.youtube.com',
  602.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  603.     s: '',
  604.   }, {
  605.     name: 'No popup for SVG/PNG icons',
  606.     d: '',
  607.     e: "img[src*='icon']",
  608.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  609.     s: '',
  610.   }],
  611.   imgtab: false,
  612.   mute: false,
  613.   preload: false,
  614.   scale: 1.25,
  615.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  616.   start: 'auto',
  617.   uiBackgroundColor: '#ffffff',
  618.   uiBackgroundOpacity: 100,
  619.   uiBorderColor: '#000000',
  620.   uiBorderOpacity: 100,
  621.   uiBorder: 0,
  622.   uiFadein: true,
  623.   uiShadowColor: '#000000',
  624.   uiShadowOpacity: 80,
  625.   uiShadow: 20,
  626.   uiPadding: 0,
  627.   uiMargin: 0,
  628.   version: 6,
  629.   waitLoad: false,
  630.   xhr: true,
  631.   zoom: 'context',
  632.   zoomOut: 'auto',
  633.   zoomStep: 133,
  634. });
  635.  
  636. const CspSniffer = {
  637.  
  638.   /** @type {?Object<string,string[]>} */
  639.   csp: null,
  640.   /** @type {?Promise<void>} */
  641.   initPending: null,
  642.   selfUrl: location.origin + '/',
  643.  
  644.   // will be null when done
  645.   init() {
  646.     this.initPending = this.initPending || new Promise(resolve => {
  647.       GM_xmlhttpRequest({
  648.         url: location.href,
  649.         method: 'HEAD',
  650.         onload: response => {
  651.           this.csp = this._parse(response);
  652.           this.init = this.initPending = null;
  653.           resolve();
  654.         },
  655.       });
  656.     });
  657.   },
  658.  
  659.   async check(url) {
  660.     await this.initPending;
  661.     const isVideo = Util.isVideoUrl(url);
  662.     let mode;
  663.     if (this.csp) {
  664.       const src = this.csp[isVideo ? 'media' : 'img'];
  665.       if (!src.some(this._srcMatches, url))
  666.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  667.     }
  668.     return [mode || ai.xhr, isVideo];
  669.   },
  670.  
  671.   _parse({responseHeaders}) {
  672.     const csp = responseHeaders.match(/(?:^|[\r\n])\s*Content-Security-Policy:([^\r\n]*)/i);
  673.     if (!csp) return;
  674.     const src = {};
  675.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  676.     for (let m; (m = rx.exec(csp[1]));)
  677.       src[m[1]] = m[2].trim().split(/\s+/);
  678.     if (!src.img) src.img = src.default || [];
  679.     if (!src.media) src.media = src.default || [];
  680.     for (const set of [src.img, src.media]) {
  681.       set.forEach((item, i) => {
  682.         if (item !== '*' && item.includes('*')) {
  683.           set[i] = new RegExp(
  684.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  685.             item
  686.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  687.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  688.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  689.             .replace(/[^/]$/, '$&/'));
  690.         }
  691.       });
  692.     }
  693.     return src;
  694.   },
  695.  
  696.   /** @this string */
  697.   _srcMatches(src) {
  698.     return src instanceof RegExp ? src.test(this) :
  699.       src === '*' ||
  700.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  701.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  702.   },
  703. };
  704.  
  705. const Events = {
  706.  
  707.   hoverData: [],
  708.   hoverTimer: 0,
  709.  
  710.   onMouseOver(e) {
  711.     let node = e.target;
  712.     if (!App.isEnabled ||
  713.         e.shiftKey ||
  714.         ai.zoomed ||
  715.         node === ai.popup ||
  716.         node === doc.body ||
  717.         node === doc.documentElement ||
  718.         node === elConfig ||
  719.         ai.gallery && ai.rectHovered)
  720.       return;
  721.     if (node.shadowRoot)
  722.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  723.     // we don't want to process everything in the path of a quickly moving mouse cursor
  724.     Events.hoverData = [now(), e, node];
  725.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  726.   },
  727.  
  728.   onMouseOverThrottled() {
  729.     const [start, e, node] = Events.hoverData;
  730.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  731.     const wait = start + SETTLE_TIME - now();
  732.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  733.     if (Events.hoverTimer || !Util.isHovered(node))
  734.       return;
  735.     if (!Ruler.rules)
  736.       Ruler.init();
  737.     let a;
  738.     const tag = node.tagName;
  739.     const src = node.currentSrc || node.src;
  740.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  741.     const info =
  742.       // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  743.       tag !== 'A' &&
  744.         RuleMatcher.find(isPic && !src.startsWith('data:') && Util.rel2abs(src), node) ||
  745.       (a = node.closest('A')) &&
  746.         RuleMatcher.findForLink(a) ||
  747.       isPic &&
  748.         {node, rule: {}, url: src};
  749.     if (info && info.url && info.node !== ai.node)
  750.       App.activate(info, e);
  751.   },
  752.  
  753.   onMouseOut(e) {
  754.     if (!e.relatedTarget && !e.shiftKey)
  755.       App.deactivate();
  756.   },
  757.  
  758.   onMouseOutShadow(e) {
  759.     const root = e.target.shadowRoot;
  760.     if (root) {
  761.       root.removeEventListener('mouseover', Events.onMouseOver);
  762.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  763.     }
  764.   },
  765.  
  766.   onMouseMove(e) {
  767.     Events.trackMouse(e);
  768.     if (e.shiftKey) {
  769.       ai.lazyUnload = true;
  770.     } else if (!ai.zoomed && !ai.rectHovered) {
  771.       App.deactivate();
  772.     } else if (ai.zoomed) {
  773.       Popup.move();
  774.       const {cx, cy, view: {w, h}} = ai;
  775.       const bx = w / 6;
  776.       const by = h / 6;
  777.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  778.       Status.set(`${onEdge ? '+' : '-'}edge`);
  779.     }
  780.   },
  781.  
  782.   onMouseDown({shiftKey, button}) {
  783.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  784.       ai.controlled = ai.zoomed = true;
  785.     } else if (button === 2 || shiftKey) {
  786.       // we ignore RMB and Shift
  787.     } else {
  788.       App.deactivate({wait: true});
  789.       doc.addEventListener('mouseup', App.enable, {once: true});
  790.     }
  791.   },
  792.  
  793.   onMouseScroll(e) {
  794.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  795.     if (ai.zoomed) {
  796.       Events.zoomInOut(dir);
  797.     } else if (ai.gNum > 1 && ai.popup) {
  798.       Gallery.next(-dir);
  799.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  800.       App.toggleZoom();
  801.     } else {
  802.       App.deactivate();
  803.       return;
  804.     }
  805.     dropEvent(e);
  806.   },
  807.  
  808.   onKeyDown(e) {
  809.     const key = eventModifiers(e) + (e.key.length > 1 ? e.key : e.code);
  810.     const p = ai.popup;
  811.     switch (key) {
  812.       case '+Shift':
  813.         Status.set('+shift');
  814.         if (p && p.tagName === 'VIDEO')
  815.           p.controls = true;
  816.         return;
  817.       case '^Control':
  818.         if (!p && (cfg.start !== 'auto' || ai.rule.manual))
  819.           App.start();
  820.         return;
  821.       case 'ArrowRight':
  822.       case 'KeyJ':
  823.         Gallery.next(1);
  824.         break;
  825.       case 'ArrowLeft':
  826.       case 'KeyK':
  827.         Gallery.next(-1);
  828.         break;
  829.       case 'KeyD':
  830.         Remoting.saveFile();
  831.         break;
  832.       case 'KeyH': // flip horizontally
  833.       case 'KeyV': // flip vertically
  834.       case 'KeyL': // rotate left
  835.       case 'KeyR': // rotate right
  836.         if (!p)
  837.           return;
  838.         if (key === 'KeyH' || key === 'KeyV') {
  839.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  840.           ai[side] = !ai[side];
  841.         } else {
  842.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  843.         }
  844.         Bar.updateDetails();
  845.         Popup.move();
  846.         break;
  847.       case 'KeyM':
  848.         if (p && p.tagName === 'VIDEO')
  849.           p.muted = !p.muted;
  850.         break;
  851.       case 'KeyT':
  852.         ai.lazyUnload = true;
  853.         GM_openInTab(Util.tabFixUrl() || p.src);
  854.         App.deactivate();
  855.         break;
  856.       case 'Minus':
  857.       case 'NumpadSubtract':
  858.         if (ai.zoomed) {
  859.           Events.zoomInOut(-1);
  860.         } else {
  861.           App.toggleZoom();
  862.         }
  863.         break;
  864.       case 'Equal':
  865.       case 'NumpadAdd':
  866.         if (ai.zoomed) {
  867.           Events.zoomInOut(1);
  868.         } else {
  869.           App.toggleZoom();
  870.         }
  871.         break;
  872.       case 'Escape':
  873.         App.deactivate({wait: true});
  874.         break;
  875.       case '!Alt':
  876.         return;
  877.       default:
  878.         App.deactivate({wait: true});
  879.         return;
  880.     }
  881.     dropEvent(e);
  882.   },
  883.  
  884.   onKeyUp(e) {
  885.     if (e.key === 'Shift') {
  886.       Status.set('-shift');
  887.       if ((ai.popup || {}).controls)
  888.         ai.popup.controls = false;
  889.       if (ai.controlled)
  890.         ai.controlled = false;
  891.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  892.         App.toggleZoom();
  893.       else
  894.         App.deactivate({wait: true});
  895.     }
  896.   },
  897.  
  898.   onContext(e) {
  899.     if (e.shiftKey) return;
  900.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  901.       dropEvent(e);
  902.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  903.       App.start();
  904.       dropEvent(e);
  905.     } else {
  906.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  907.     }
  908.   },
  909.  
  910.   pierceShadow(node, x, y) {
  911.     for (let root; (root = node.shadowRoot);) {
  912.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  913.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  914.       const inner = root.elementFromPoint(x, y);
  915.       if (!inner || inner === node)
  916.         break;
  917.       node = inner;
  918.     }
  919.     return node;
  920.   },
  921.  
  922.   toggle(enable) {
  923.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  924.     const passive = enable ? {passive: true} : undefined;
  925.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  926.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  927.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  928.     onOff.call(doc, 'contextmenu', Events.onContext);
  929.     onOff.call(doc, 'keydown', Events.onKeyDown, true); // override normal page listeners
  930.     onOff.call(doc, 'keyup', Events.onKeyUp);
  931.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  932.   },
  933.  
  934.   trackMouse(e) {
  935.     const cx = ai.cx = e.clientX;
  936.     const cy = ai.cy = e.clientY;
  937.     const r = ai.rect || (ai.rect = Calc.rect());
  938.     ai.rectHovered =
  939.       cx > r.left - 2 && cx < r.right + 2 &&
  940.       cy > r.top - 2 && cy < r.bottom + 2;
  941.   },
  942.  
  943.   zoomInOut(dir) {
  944.     const i = Calc.scaleIndex(dir);
  945.     const n = ai.scales.length;
  946.     if (i >= 0 && i < n)
  947.       ai.scale = ai.scales[i];
  948.     const zo = cfg.zoomOut;
  949.     if (i <= 0 && zo !== 'stay') {
  950.       if (ai.scaleFit < ai.scale * .99) {
  951.         ai.scales.unshift(ai.scale = ai.scaleFit);
  952.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  953.         App.deactivate({wait: true});
  954.         return;
  955.       }
  956.       ai.zoomed = zo !== 'unzoom';
  957.     } else {
  958.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  959.     }
  960.     if (ai.zooming)
  961.       ai.popup.classList.add(`${PREFIX}zooming`);
  962.     Popup.move();
  963.     Bar.updateDetails();
  964.   },
  965. };
  966.  
  967. const Gallery = {
  968.  
  969.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  970.  
  971.   makeParser(g) {
  972.     return (
  973.       typeof g === 'function' ? g :
  974.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  975.           Gallery.defaultParser
  976.     );
  977.   },
  978.  
  979.   findIndex(gUrl) {
  980.     const sel = gUrl.split('#')[1];
  981.     if (!sel)
  982.       return 0;
  983.     if (/^\d+$/.test(sel))
  984.       return parseInt(sel);
  985.     for (let i = ai.gNum; i--;) {
  986.       let {url} = ai.gItems[i];
  987.       if (Array.isArray(url))
  988.         url = url[0];
  989.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  990.         return i;
  991.     }
  992.     return 0;
  993.   },
  994.  
  995.   next(dir) {
  996.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  997.     const item = ai.gItems[ai.gIndex];
  998.     if (Array.isArray(item.url)) {
  999.       ai.urls = item.url.slice(1);
  1000.       ai.url = item.url[0];
  1001.     } else {
  1002.       ai.urls = null;
  1003.       ai.url = item.url;
  1004.     }
  1005.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1006.     App.startSingle();
  1007.     Bar.updateName();
  1008.   },
  1009.  
  1010.   nextIndex(dir) {
  1011.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1012.   },
  1013.  
  1014.   defaultParser(text, doc, docUrl, m, rule) {
  1015.     const {g} = rule;
  1016.     const qEntry = g.entry;
  1017.     const qCaption = ensureArray(g.caption);
  1018.     const qImage = g.image;
  1019.     const qTitle = g.title;
  1020.     const fix =
  1021.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1022.       (s => s.trim());
  1023.     const items = [...$$(qEntry || qImage, doc)]
  1024.       .map(processEntry)
  1025.       .filter(Boolean);
  1026.     items.title = processTitle();
  1027.     items.index =
  1028.       typeof g.index === 'string' &&
  1029.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1030.       RX_HAS_CODE.test(g.index) &&
  1031.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1032.       g.index;
  1033.     return items;
  1034.  
  1035.     function processEntry(entry) {
  1036.       const item = {};
  1037.       try {
  1038.         const img = qEntry ? $(qImage, entry) : entry;
  1039.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1040.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1041.       } catch (e) {}
  1042.       return item.url && item;
  1043.     }
  1044.  
  1045.     function processCaption(selector) {
  1046.       const el = $(selector, this) ||
  1047.                  $orSelf(selector, this.previousElementSibling) ||
  1048.                  $orSelf(selector, this.nextElementSibling);
  1049.       return el && fix(el.textContent);
  1050.     }
  1051.  
  1052.     function processTitle() {
  1053.       const el = $(qTitle, doc);
  1054.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1055.     }
  1056.  
  1057.     function $orSelf(selector, el) {
  1058.       if (el && !el.matches(qEntry))
  1059.         return el.matches(selector) ? el : $(selector, el);
  1060.     }
  1061.   },
  1062. };
  1063.  
  1064. const Popup = {
  1065.  
  1066.   async create(src, pageUrl) {
  1067.     Popup.destroy();
  1068.     ai.imageUrl = src;
  1069.     if (!src)
  1070.       return;
  1071.     const myAi = ai;
  1072.     let [xhr, isVideo] = await CspSniffer.check(src);
  1073.     if (ai !== myAi)
  1074.       return;
  1075.     if (xhr)
  1076.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1077.     if (ai !== myAi || !src)
  1078.       return;
  1079.     const p = ai.popup = isVideo ? PopupVideo.create() : $create('img');
  1080.     p.id = `${PREFIX}popup`;
  1081.     p.src = src;
  1082.     p.addEventListener('error', App.handleError);
  1083.     if (ai.zooming)
  1084.       p.addEventListener('transitionend', Popup.onZoom);
  1085.     doc.body.insertBefore(p, ai.bar || undefined);
  1086.     await 0;
  1087.     if (App.checkProgress({start: true}) === false)
  1088.       return;
  1089.     if (p.complete)
  1090.       Popup.onLoad.call(ai.popup);
  1091.     else if (!isVideo)
  1092.       p.addEventListener('load', Popup.onLoad, {once: true});
  1093.   },
  1094.  
  1095.   destroy() {
  1096.     const p = ai.popup;
  1097.     if (!p) return;
  1098.     p.removeEventListener('load', Popup.onLoad);
  1099.     p.removeEventListener('error', App.handleError);
  1100.     if (typeof p.pause === 'function')
  1101.       p.pause();
  1102.     if (!ai.lazyUnload) {
  1103.       if (p.src.startsWith('blob:'))
  1104.         URL.revokeObjectURL(p.src);
  1105.     }
  1106.     p.remove();
  1107.     ai.zoomed = ai.popup = ai.popupLoaded = null;
  1108.   },
  1109.  
  1110.   move() {
  1111.     let x, y;
  1112.     const {cx, cy, extras, view} = ai;
  1113.     const vw = view.w - extras.outw;
  1114.     const vh = view.h - extras.outh;
  1115.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1116.     const h0 = ai.scale * ai.nheight + extras.inh;
  1117.     const isSwapped = ai.rotate % 180;
  1118.     const w = isSwapped ? h0 : w0;
  1119.     const h = isSwapped ? w0 : h0;
  1120.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1121.       const r = ai.rect;
  1122.       const rx = (r.left + r.right) / 2;
  1123.       const ry = (r.top + r.bottom) / 2;
  1124.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1125.         if (h < vh - 60)
  1126.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1127.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1128.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1129.         if (w < vw - 60)
  1130.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1131.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1132.       }
  1133.     }
  1134.     if (x == null)
  1135.       x = (vw - w) * (vw > w ? .5 : clamp(5 / 3 * (cx / vw - .2), 0, 1));
  1136.     if (y == null)
  1137.       y = (vh - h) * (vh > h ? .5 : clamp(5 / 3 * (cy / vh - .2), 0, 1));
  1138.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1139.     x += extras.o - diff;
  1140.     y += extras.o + diff;
  1141.     $css(ai.popup, {
  1142.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1143.                  `rotate(${ai.rotate || 0}deg) ` +
  1144.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1145.       width: `${Math.round(w0)}px`,
  1146.       height: `${Math.round(h0)}px`,
  1147.     });
  1148.   },
  1149.  
  1150.   onLoad() {
  1151.     if (this === ai.popup) {
  1152.       this.setAttribute('loaded', '');
  1153.       ai.popupLoaded = true;
  1154.       Status.set('-loading');
  1155.       if (ai.preloadUrl) {
  1156.         $create('img', {src: ai.preloadUrl});
  1157.         ai.preloadUrl = null;
  1158.       }
  1159.     }
  1160.   },
  1161.  
  1162.   onZoom() {
  1163.     this.classList.remove(`${PREFIX}zooming`);
  1164.   },
  1165. };
  1166.  
  1167. const PopupVideo = {
  1168.   create() {
  1169.     ai.bufBar = false;
  1170.     ai.bufStart = now();
  1171.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1172.     return $create('video', {
  1173.       autoplay: true,
  1174.       controls: shouldMute,
  1175.       muted: shouldMute,
  1176.       loop: true,
  1177.       volume: clamp(+GM_getValue('volume') || .5, 0, 1),
  1178.       onprogress: PopupVideo.progress,
  1179.       oncanplaythrough: PopupVideo.progressDone,
  1180.       onvolumechange: PopupVideo.rememberVolume,
  1181.     });
  1182.   },
  1183.  
  1184.   progress() {
  1185.     const {duration} = this;
  1186.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1187.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1188.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1189.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1190.     }
  1191.   },
  1192.  
  1193.   progressDone() {
  1194.     this.onprogress = this.oncanplaythrough = null;
  1195.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1196.       Bar.set(false);
  1197.     Popup.onLoad.call(this);
  1198.   },
  1199.  
  1200.   rememberVolume() {
  1201.     GM_setValue('volume', this.volume);
  1202.   },
  1203. };
  1204.  
  1205. const Ruler = {
  1206. /*
  1207.  'u' works only with URLs so it's ignored if 'html' is true
  1208.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1209.    |foo = url or text must start with foo
  1210.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1211.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1212.  'r' is checked only if 'u' matches first
  1213. */
  1214.   init() {
  1215.     const errors = new Map();
  1216.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1217.     for (const rule of errors.keys())
  1218.       App.handleError('Invalid custom host rule:', rule);
  1219.  
  1220.     // rules that disable previewing
  1221.     const disablers = [
  1222.       dotDomain.endsWith('.stackoverflow.com') && {
  1223.         e: '.post-tag, .post-tag img',
  1224.         s: '',
  1225.       },
  1226.       {
  1227.         u: '||disqus.com/',
  1228.         s: '',
  1229.       },
  1230.     ];
  1231.  
  1232.     // optimization: a rule is created only when on domain
  1233.     const perDomain = [
  1234.       hostname.includes('startpage') && {
  1235.         r: /\boiu=(.+)/,
  1236.         s: '$1',
  1237.         follow: true,
  1238.       },
  1239.       dotDomain.endsWith('.4chan.org') && {
  1240.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1241.         q: '.op .fileText a',
  1242.         css: '#post-preview{display:none}',
  1243.       },
  1244.       hostname.includes('amazon.') && {
  1245.         r: /.+?images\/I\/.+?\./,
  1246.         s: m => {
  1247.           const uh = doc.getElementById('universal-hover');
  1248.           return uh ? '' : m[0] + 'jpg';
  1249.         },
  1250.         css: '#zoomWindow{display:none!important;}',
  1251.       },
  1252.       dotDomain.endsWith('.bing.com') && {
  1253.         e: 'a[m*="murl"]',
  1254.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1255.         s: '$1',
  1256.         html: true,
  1257.       },
  1258.       ...dotDomain.endsWith('.deviantart.com') && [{
  1259.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1260.         s: (m, node) =>
  1261.           $propUp(node, 'data-super-full-img') ||
  1262.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1263.           node.dataset.embedId && node.src,
  1264.       }, {
  1265.         e: '.dev-view-deviation img',
  1266.         s: () => [
  1267.           $('.dev-page-download').href,
  1268.           $('.dev-content-full').src,
  1269.         ].filter(Boolean),
  1270.       }, {
  1271.         e: 'a[data-hook=deviation_link]',
  1272.         q: 'link[as=image]',
  1273.       }] || [],
  1274.       dotDomain.endsWith('.dropbox.com') && {
  1275.         r: /(.+?&size_mode)=\d+(.*)/,
  1276.         s: '$1=5$2',
  1277.       },
  1278.       dotDomain.endsWith('.facebook.com') && {
  1279.         e: 'a[href*="ref=hovercard"]',
  1280.         s: (m, node) =>
  1281.           'https://www.facebook.com/photo.php?fbid=' +
  1282.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1283.         follow: true,
  1284.       },
  1285.       dotDomain.endsWith('.facebook.com') && {
  1286.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1287.         s: (m, node) =>
  1288.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1289.             decodeURIComponent(m[4]),
  1290.         html: true,
  1291.         follow: true,
  1292.       },
  1293.       dotDomain.endsWith('.flickr.com') &&
  1294.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1295.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1296.         s: m => `https://www.flickr.com/services/rest/?${
  1297.           new URLSearchParams({
  1298.             photo_id: m[1],
  1299.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1300.             method: 'flickr.photos.getSizes',
  1301.             format: 'json',
  1302.             nojsoncallback: 1,
  1303.           }).toString()}`,
  1304.         q: text => JSON.parse(text).sizes.size.pop().source,
  1305.       },
  1306.       dotDomain.endsWith('.github.com') && {
  1307.         r: new RegExp([
  1308.           /(avatars.+?&s=)\d+/,
  1309.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1310.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1311.         ].map(rx => rx.source).join('|')),
  1312.         s: m => `https://${
  1313.           m[1] ? `${m[1]}460` :
  1314.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1315.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1316.         }`,
  1317.       },
  1318.       isGoogleImages && {
  1319.         e: 'a[href*="imgres?imgurl="] img',
  1320.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1321.         follow: true,
  1322.       },
  1323.       isGoogleImages && {
  1324.         e: '[data-tbnid] a:not([href])',
  1325.         s: (m, a) => {
  1326.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1327.           new MutationObserver((_, mo) => {
  1328.             mo.disconnect();
  1329.             App.isEnabled = true;
  1330.             a.alt = a2.innerText;
  1331.             const {left, top} = a.getBoundingClientRect();
  1332.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1333.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1334.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1335.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1336.         },
  1337.       },
  1338.       dotDomain.endsWith('.instagram.com') && {
  1339.         e: [
  1340.           'a[href*="/p/"]',
  1341.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1342.         ],
  1343.         s: (m, node, rule) => {
  1344.           let data, a, n, img, src;
  1345.           if (location.pathname.startsWith('/p/')) {
  1346.             img = $('img[srcset], video', node.parentNode);
  1347.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1348.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1349.           }
  1350.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1351.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1352.             data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  1353.           }
  1354.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1355.           Ruler.toggle(rule, 'g', a && $('[class*="Carousel"]', a));
  1356.           rule.follow = !data && !rule.g;
  1357.           rule._data = data;
  1358.           rule._img = img;
  1359.           return (
  1360.             !a && !src ? false :
  1361.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1362.                 data.video_url || data.display_url);
  1363.         },
  1364.         c: (html, doc, node, rule) =>
  1365.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1366.         follow: true,
  1367.         _q: 'meta[property="og:video"]',
  1368.         _g(text, doc, url, m, rule) {
  1369.           const media = JSON.parse(text).graphql.shortcode_media;
  1370.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1371.             url: e.node.video_url || e.node.display_url,
  1372.           }));
  1373.           items.title = tryCatch(rule._getCaption, media) || '';
  1374.           return items;
  1375.         },
  1376.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1377.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1378.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1379.       },
  1380.       ...dotDomain.endsWith('.reddit.com') && [{
  1381.         u: '||i.reddituploads.com/',
  1382.       }, {
  1383.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1384.         s: (m, node) => $propUp(node, 'data-url'),
  1385.       }, {
  1386.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1387.         s: 'https://i$1',
  1388.       }] || [],
  1389.       dotDomain.endsWith('.tumblr.com') && {
  1390.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1391.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1392.         follow: true,
  1393.       },
  1394.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1395.         e: 'a.media-item, a.js-media-image-link',
  1396.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1397.         follow: true,
  1398.       },
  1399.       dotDomain.endsWith('.twitter.com') && {
  1400.         e: '.grid-tweet > .media-overlay',
  1401.         s: (m, node) => node.previousElementSibling.src,
  1402.         follow: true,
  1403.       },
  1404.     ];
  1405.  
  1406.     const main = [
  1407.       {
  1408.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1409.         s: '$1',
  1410.         follow: true,
  1411.         onerror: 'skip',
  1412.       },
  1413.       {
  1414.         u: [
  1415.           '||500px.com/photo/',
  1416.           '||cl.ly/',
  1417.           '||cweb-pix.com/',
  1418.           '||ibb.co/',
  1419.           '||imgcredit.xyz/image/',
  1420.         ],
  1421.         r: /\.\w+\/.+/,
  1422.         q: 'meta[property="og:image"]',
  1423.       },
  1424.       {
  1425.         u: 'attachment.php',
  1426.         r: /attachment\.php.+attachmentid/,
  1427.       },
  1428.       {
  1429.         u: '||abload.de/image',
  1430.         q: '#image',
  1431.       },
  1432.       {
  1433.         u: '||deviantart.com/art/',
  1434.         s: (m, node) =>
  1435.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1436.             '' :
  1437.             m.input,
  1438.         q: [
  1439.           '#download-button[href*=".jpg"]',
  1440.           '#download-button[href*=".jpeg"]',
  1441.           '#download-button[href*=".gif"]',
  1442.           '#download-button[href*=".png"]',
  1443.           '#gmi-ResViewSizer_fullimg',
  1444.           'img.dev-content-full',
  1445.         ],
  1446.       },
  1447.       {
  1448.         u: '||dropbox.com/s',
  1449.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1450.         q: (text, doc) =>
  1451.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1452.       },
  1453.       {
  1454.         r: /[./]ebay\.[^/]+\/itm\//,
  1455.         q: text =>
  1456.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1457.             .replace(/~~60_\d+/, '~~60_57'),
  1458.       },
  1459.       {
  1460.         u: '||i.ebayimg.com/',
  1461.         s: (m, node) =>
  1462.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1463.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1464.       },
  1465.       {
  1466.         u: '||fastpic.ru',
  1467.         e: 'a',
  1468.         q: 'img[src*="/big/"]',
  1469.         xhr: true,
  1470.       },
  1471.       {
  1472.         u: '||facebook.com/',
  1473.         r: /photo\.php|[^/]+\/photos\//,
  1474.         s: (m, node) =>
  1475.           node.id === 'fbPhotoImage' ? false :
  1476.             /gradient\.png$/.test(m.input) ? '' :
  1477.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1478.         q: [
  1479.           'div + span > a:first-child:not([href*="tag_faces"])',
  1480.           'div + span > a[href*="tag_faces"] ~ a',
  1481.         ],
  1482.         rect: '#fbProfileCover',
  1483.       },
  1484.       {
  1485.         u: '||fbcdn.',
  1486.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1487.         s: m =>
  1488.           dotDomain.endsWith('.facebook.com') &&
  1489.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1490.           false,
  1491.         manual: true,
  1492.       },
  1493.       {
  1494.         u: ['||fbcdn-', 'fbcdn.net/'],
  1495.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1496.         s: (m, node) => {
  1497.           if (node.id === 'fbPhotoImage') {
  1498.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1499.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1500.           }
  1501.           if (m[4])
  1502.             return false;
  1503.           const pn = node.parentNode;
  1504.           if (pn.outerHTML.includes('/hovercard/'))
  1505.             return '';
  1506.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1507.             return false;
  1508.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1509.         },
  1510.         rect: '.photoWrap',
  1511.       },
  1512.       {
  1513.         u: '||flickr.com/photos/',
  1514.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1515.         s: m =>
  1516.           m.input.indexOf('/sizes/') < 0 ?
  1517.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1518.             false,
  1519.         q: (text, doc) => {
  1520.           const links = $$('.sizes-list a', doc);
  1521.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1522.         },
  1523.         follow: true,
  1524.       },
  1525.       {
  1526.         u: '||flickr.com/photos/',
  1527.         r: /\/sizes\//,
  1528.         q: '#allsizes-photo > img',
  1529.       },
  1530.       {
  1531.         u: '||gfycat.com/',
  1532.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1533.         s: 'https://$1$3',
  1534.         q: [
  1535.           'meta[content$=".webm"]',
  1536.           '#webmsource',
  1537.           'source[src$=".webm"]',
  1538.         ],
  1539.       },
  1540.       {
  1541.         u: [
  1542.           '||googleusercontent.com/proxy',
  1543.           '||googleusercontent.com/gadgets/proxy',
  1544.         ],
  1545.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1546.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1547.       },
  1548.       {
  1549.         u: [
  1550.           '||googleusercontent.com/',
  1551.           '||ggpht.com/',
  1552.         ],
  1553.         s: m => m.input.includes('webcache.') ? '' :
  1554.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1555.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1556.       },
  1557.       {
  1558.         u: '||gravatar.com/',
  1559.         r: /([a-z0-9]{32})/,
  1560.         s: 'https://gravatar.com/avatar/$1?s=200',
  1561.       },
  1562.       {
  1563.         u: '//gyazo.com/',
  1564.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1565.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1566.         _q: 'meta[name="twitter:image"]',
  1567.       },
  1568.       {
  1569.         u: '||hostingkartinok.com/show-image.php',
  1570.         q: '.image img',
  1571.       },
  1572.       {
  1573.         u: [
  1574.           '||imagecurl.com/images/',
  1575.           '||imagecurl.com/viewer.php',
  1576.         ],
  1577.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1578.         s: 'https://imagecurl.com/images/$1$2$3',
  1579.       },
  1580.       {
  1581.         u: '||imagebam.com/image/',
  1582.         q: 'meta[property="og:image"]',
  1583.         tabfix: true,
  1584.         xhr: hostname.includes('planetsuzy'),
  1585.       },
  1586.       {
  1587.         u: '||imageban.ru/thumbs',
  1588.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1589.         s: '$1out$2/$3/$4',
  1590.       },
  1591.       {
  1592.         u: [
  1593.           '||imageban.ru/show',
  1594.           '||imageban.net/show',
  1595.           '||ibn.im/',
  1596.         ],
  1597.         q: '#img_main',
  1598.       },
  1599.       {
  1600.         u: '||imageshack.us/img',
  1601.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1602.         s: 'https://$2/download/$1/$3$4',
  1603.       },
  1604.       {
  1605.         u: '||imageshack.us/i/',
  1606.         q: '#share-dl',
  1607.       },
  1608.       {
  1609.         u: '||imageteam.org/img',
  1610.         q: 'img[alt="image"]',
  1611.       },
  1612.       {
  1613.         u: [
  1614.           '||imagetwist.com/',
  1615.           '||imageshimage.com/',
  1616.         ],
  1617.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1618.         q: 'img.pic',
  1619.         xhr: true,
  1620.       },
  1621.       {
  1622.         u: '||imageupper.com/i/',
  1623.         q: '#img',
  1624.         xhr: true,
  1625.       },
  1626.       {
  1627.         u: '||imagevenue.com/',
  1628.         q: 'a[data-toggle="full"] img',
  1629.       },
  1630.       {
  1631.         u: '||imagezilla.net/show/',
  1632.         q: '#photo',
  1633.         xhr: true,
  1634.       },
  1635.       {
  1636.         u: [
  1637.           '||images-na.ssl-images-amazon.com/images/',
  1638.           '||media-imdb.com/images/',
  1639.         ],
  1640.         r: /images\/.+?\.jpg/,
  1641.         s: '/V1\\.?_.+?\\.//g',
  1642.       },
  1643.       {
  1644.         u: '||imgbox.com/',
  1645.         r: /\.com\/([a-z0-9]+)$/i,
  1646.         q: '#img',
  1647.         xhr: hostname !== 'imgbox.com',
  1648.       },
  1649.       {
  1650.         u: '||imgclick.net/',
  1651.         r: /\.net\/(\w+)/,
  1652.         q: 'img.pic',
  1653.         xhr: true,
  1654.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1655.       },
  1656.       {
  1657.         u: '.imgcredit.xyz/',
  1658.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1659.         s: ['https$1$2', 'https$1.png']
  1660.       },
  1661.       {
  1662.         u: [
  1663.           '||imgflip.com/i/',
  1664.           '||imgflip.com/gif/',
  1665.         ],
  1666.         r: /\/(i|gif)\/([^/?#]+)/,
  1667.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1668.       },
  1669.       {
  1670.         u: [
  1671.           '||imgur.com/a/',
  1672.           '||imgur.com/gallery/',
  1673.         ],
  1674.         g: async (text, doc, url, m, rule, node, cb) => {
  1675.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1676.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1677.           const images = ((info || 0).data || 0).images;
  1678.           const items = [];
  1679.           for (const img of images || []) {
  1680.             u = `https://i.imgur.com/${img.hash}`;
  1681.             items.push({
  1682.               url: img.ext === '.gif' && img.animated !== false ?
  1683.                 [`${u}.webm`, `${u}.mp4`, u] :
  1684.                 u + img.ext,
  1685.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1686.             });
  1687.           }
  1688.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1689.             items.title = info.title;
  1690.           cb(items);
  1691.         },
  1692.         css: '.post > .hover { display:none!important; }',
  1693.       },
  1694.       {
  1695.         u: '||imgur.com/',
  1696.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1697.         s: 'gallery',
  1698.         g: (text, doc, url, m) =>
  1699.           m[2].split(',').map(id => ({
  1700.             url: `https://i.${m[1]}${id}.jpg`,
  1701.           })),
  1702.       },
  1703.       {
  1704.         u: '||imgur.com/',
  1705.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1706.         s: (m, node) => {
  1707.           if (/memegen|random|register|search|signin/.test(m.input))
  1708.             return '';
  1709.           const a = node.closest('a');
  1710.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1711.             return false;
  1712.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1713.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1714.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1715.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1716.           return ext === 'webm' ?
  1717.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1718.             u + ext;
  1719.         },
  1720.       },
  1721.       {
  1722.         u: [
  1723.           '||instagr.am/p/',
  1724.           '||instagram.com/p/',
  1725.         ],
  1726.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1727.         q: text => {
  1728.           const m = JSON.parse(text).graphql.shortcode_media;
  1729.           return m.video_url || m.display_url;
  1730.         },
  1731.         rect: 'div.PhotoGridMediaItem',
  1732.         c: text => {
  1733.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1734.           return m === undefined ? '(no caption)' : m.node.text;
  1735.         },
  1736.       },
  1737.       {
  1738.         u: [
  1739.           '||livememe.com/',
  1740.           '||lvme.me/',
  1741.         ],
  1742.         r: /\.\w+\/([^.]+)$/,
  1743.         s: 'http://i.lvme.me/$1.jpg',
  1744.       },
  1745.       {
  1746.         u: '||lostpic.net/image',
  1747.         q: '.image-viewer-image img',
  1748.       },
  1749.       {
  1750.         u: '||makeameme.org/meme/',
  1751.         r: /\/meme\/([^/?#]+)/,
  1752.         s: 'https://media.makeameme.org/created/$1.jpg',
  1753.       },
  1754.       {
  1755.         u: '||photobucket.com/',
  1756.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1757.         s: 'https://i$1$3',
  1758.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1759.       },
  1760.       {
  1761.         u: '||piccy.info/view3/',
  1762.         r: /(.+?\/view3)\/(.*)\//,
  1763.         s: '$1/$2/orig/',
  1764.         q: '#mainim',
  1765.       },
  1766.       {
  1767.         u: '||pimpandhost.com/image/',
  1768.         r: /(.+?\/image\/[0-9]+)/,
  1769.         s: '$1?size=original',
  1770.         q: 'img.original',
  1771.       },
  1772.       {
  1773.         u: [
  1774.           '||pixroute.com/',
  1775.           '||imgspice.com/',
  1776.         ],
  1777.         r: /\.html$/,
  1778.         q: 'img[id]',
  1779.         xhr: true,
  1780.       },
  1781.       {
  1782.         u: '||postima',
  1783.         r: /postima?ge?\.org\/image\/\w+/,
  1784.         q: [
  1785.           'a[href*="dl="]',
  1786.           '#main-image',
  1787.         ],
  1788.       },
  1789.       {
  1790.         u: [
  1791.           '||prntscr.com/',
  1792.           '||prnt.sc/',
  1793.         ],
  1794.         r: /\.\w+\/.+/,
  1795.         q: 'meta[property="og:image"]',
  1796.         xhr: true,
  1797.       },
  1798.       {
  1799.         u: '||radikal.ru/',
  1800.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1801.         s: (m, node, rule) =>
  1802.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1803.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1804.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1805.       },
  1806.       {
  1807.         u: '||tumblr.com',
  1808.         r: /_500\.jpg/,
  1809.         s: ['/_500/_1280/', ''],
  1810.       },
  1811.       {
  1812.         u: '||twimg.com/',
  1813.         r: /\/profile_images/i,
  1814.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1815.       },
  1816.       {
  1817.         u: '||twimg.com/media/',
  1818.         r: /.+?format=(jpe?g|png|gif)/i,
  1819.         s: '$0&name=orig',
  1820.       },
  1821.       {
  1822.         u: '||twimg.com/1/proxy',
  1823.         r: /t=([^&_]+)/i,
  1824.         s: m => atob(m[1]).match(/http.+/),
  1825.       },
  1826.       {
  1827.         u: '||pic.twitter.com/',
  1828.         r: /\.com\/[a-z0-9]+/i,
  1829.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1830.         follow: true,
  1831.       },
  1832.       {
  1833.         u: '||twitpic.com/',
  1834.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1835.         s: 'https://twitpic.com/show/large/$2',
  1836.       },
  1837.       {
  1838.         u: '||wiki',
  1839.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1840.         s: '/\\/thumb(?=\\/)|' +
  1841.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1842.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1843.         xhr: !hostname.includes('wiki'),
  1844.       },
  1845.       {
  1846.         u: '||ytimg.com/vi/',
  1847.         r: /(.+?\/vi\/[^/]+)/,
  1848.         s: '$1/0.jpg',
  1849.         rect: '.video-list-item',
  1850.       },
  1851.       {
  1852.         u: '/viewer.php?file=',
  1853.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1854.         s: '$1/images/$2',
  1855.         xhr: true,
  1856.       },
  1857.       {
  1858.         u: '/thumb_',
  1859.         r: /\/albums.+\/thumb_[^/]/,
  1860.         s: '/thumb_//',
  1861.       },
  1862.       {
  1863.         u: [
  1864.           '.th.jp',
  1865.           '.th.gif',
  1866.           '.th.png',
  1867.         ],
  1868.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1869.         s: '$1$2',
  1870.         follow: true,
  1871.       },
  1872.       {
  1873.         r: RX_MEDIA_URL,
  1874.       },
  1875.     ];
  1876.  
  1877.     /** @type mpiv.HostRule[] */
  1878.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1879.   },
  1880.  
  1881.   format(rule, {expand} = {}) {
  1882.     const s = Util.stringify(rule, null, ' ');
  1883.     return expand ?
  1884.       /* {"a": ...,
  1885.           "b": ...,
  1886.           "c": ...
  1887.          } */
  1888.       s.replace(/^{\s+/g, '{') :
  1889.       /* {"a": ..., "b": ..., "c": ...} */
  1890.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1891.   },
  1892.  
  1893.   fromElement(el) {
  1894.     const text = el.textContent.trim();
  1895.     if (text.startsWith('{') &&
  1896.         text.endsWith('}') &&
  1897.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  1898.       const rule = tryCatch(JSON.parse, text);
  1899.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  1900.     }
  1901.   },
  1902.  
  1903.   /** @returns mpiv.HostRule | Error | false | undefined */
  1904.   parse(rule) {
  1905.     const isBatchOp = this instanceof Map;
  1906.     try {
  1907.       if (typeof rule === 'string')
  1908.         rule = JSON.parse(rule);
  1909.       if ('d' in rule && typeof rule.d !== 'string')
  1910.         rule.d = undefined;
  1911.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1912.         return false;
  1913.       const compileTo = isBatchOp ? rule : {};
  1914.       if (rule.r)
  1915.         compileTo.r = new RegExp(rule.r, 'i');
  1916.       if (RX_HAS_CODE.test(rule.s))
  1917.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1918.       if (RX_HAS_CODE.test(rule.q))
  1919.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1920.       if (RX_HAS_CODE.test(rule.c))
  1921.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1922.       return rule;
  1923.     } catch (e) {
  1924.       if (!e.message.includes('unsafe-eval'))
  1925.         if (isBatchOp) {
  1926.           this.set(rule, e);
  1927.         } else {
  1928.           return e;
  1929.         }
  1930.     }
  1931.   },
  1932.  
  1933.   runC(text, doc = document) {
  1934.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  1935.     ai.caption = fn(text, doc);
  1936.   },
  1937.  
  1938.   runCHandler: {
  1939.     function: (text, doc) =>
  1940.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  1941.     string: (text, doc) => {
  1942.       const el = $many(ai.rule.c, doc);
  1943.       return !el ? '' :
  1944.         el.getAttribute('content') ||
  1945.         el.getAttribute('title') ||
  1946.         el.textContent;
  1947.     },
  1948.     default: () =>
  1949.       (ai.tooltip || 0).text ||
  1950.       ai.node.alt ||
  1951.       $propUp(ai.node, 'title') ||
  1952.       Remoting.getFileName(
  1953.         ai.node.tagName === (ai.popup || 0).tagName
  1954.           ? ai.url
  1955.           : ai.node.src || $propUp(ai.node, 'href')),
  1956.   },
  1957.  
  1958.   runQ(text, doc, docUrl) {
  1959.     let url;
  1960.     if (typeof ai.rule.q === 'function') {
  1961.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1962.       if (Array.isArray(url)) {
  1963.         ai.urls = url.slice(1);
  1964.         url = url[0];
  1965.       }
  1966.     } else {
  1967.       const el = $many(ai.rule.q, doc);
  1968.       url = Remoting.findImageUrl(el, docUrl);
  1969.     }
  1970.     return url;
  1971.   },
  1972.  
  1973.   /** @returns {?Array} if falsy then the rule should be skipped */
  1974.   runS(node, rule, m) {
  1975.     let urls = [];
  1976.     for (const s of ensureArray(rule.s))
  1977.       urls.push(
  1978.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  1979.           typeof s === 'function' ? s(m, node, rule) :
  1980.             s);
  1981.     if (rule.q && urls.length > 1) {
  1982.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1983.       return;
  1984.     }
  1985.     if (Array.isArray(urls[0]))
  1986.       urls = urls[0];
  1987.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  1988.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  1989.   },
  1990.  
  1991.   substituteSingle(s, m) {
  1992.     if (!m) return s;
  1993.     if (s.startsWith('/') && !s.startsWith('//')) {
  1994.       const mid = s.search(/[^\\]\//) + 1;
  1995.       const end = s.lastIndexOf('/');
  1996.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1997.       return m.input.replace(re, s.slice(mid + 1, end));
  1998.     }
  1999.     if (m.length && s.includes('$')) {
  2000.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2001.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2002.         for (let i = maxLength; i >= 0; i--) {
  2003.           const part = num.slice(0, i) | 0;
  2004.           if (part < m.length)
  2005.             return (m[part] || '') + num.slice(i);
  2006.         }
  2007.         return text;
  2008.       });
  2009.     }
  2010.     return s;
  2011.   },
  2012.  
  2013.   toggle(rule, prop, condition) {
  2014.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2015.     return condition;
  2016.   },
  2017. };
  2018.  
  2019. const RuleMatcher = {
  2020.  
  2021.   /** @returns ?mpiv.RuleMatchInfo */
  2022.   findForLink(a) {
  2023.     let url =
  2024.       a.getAttribute('data-expanded-url') ||
  2025.       a.getAttribute('data-full-url') ||
  2026.       a.getAttribute('data-url') ||
  2027.       a.href;
  2028.     if (url.startsWith('data:'))
  2029.       url = false;
  2030.     else if (url.includes('//t.co/'))
  2031.       url = 'http://' + a.textContent;
  2032.     return RuleMatcher.find(url, a);
  2033.   },
  2034.  
  2035.   /** @returns ?mpiv.RuleMatchInfo */
  2036.   find(url, node, {noHtml, skipRules} = {}) {
  2037.     const tn = node.tagName;
  2038.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2039.     const isPicOrLink = isPic || tn === 'A';
  2040.     let m, html;
  2041.     for (const rule of Ruler.rules) {
  2042.       const u = rule[SYM_U] || rule.u && (rule[SYM_U] = UrlMatcher(rule.u));
  2043.       if (u && (!url || !u.fn.call(u.data, url)) ||
  2044.           rule.e && !node.matches(rule.e) ||
  2045.           skipRules && skipRules.includes(rule))
  2046.         continue;
  2047.       if (rule.r)
  2048.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2049.           ? rule.r.exec(html || (html = node.outerHTML))
  2050.           : url && rule.r.exec(url);
  2051.       else if (url)
  2052.         m = Object.assign([url], {index: 0, input: url});
  2053.       else
  2054.         m = [];
  2055.       if (!m)
  2056.         continue;
  2057.       if (rule.s === '')
  2058.         return {};
  2059.       let hasS = rule.s != null;
  2060.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2061.       // but we'll only allow it to match rules without 's' in the nested find call
  2062.       if (isPic && !hasS && !skipRules)
  2063.         continue;
  2064.       hasS &= rule.s !== 'gallery';
  2065.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2066.       if (urls)
  2067.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2068.     }
  2069.   },
  2070.  
  2071.   /** @returns ?mpiv.RuleMatchInfo */
  2072.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2073.     let info;
  2074.     let url = `${urls[0]}`;
  2075.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2076.     if (!url)
  2077.       info = {};
  2078.     if (follow)
  2079.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2080.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2081.       const xhr = cfg.xhr && rule.xhr;
  2082.       if (url.startsWith('//'))
  2083.         url = location.protocol + url;
  2084.       info = {
  2085.         match,
  2086.         node,
  2087.         rule,
  2088.         url,
  2089.         urls: urls.length > 1 ? urls.slice(1) : null,
  2090.         gallery: rule.g && Gallery.makeParser(rule.g),
  2091.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2092.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2093.       };
  2094.     }
  2095.     return info;
  2096.   },
  2097.  
  2098.   isFollowableUrl(url, rule) {
  2099.     const f = rule.follow;
  2100.     return typeof f === 'function' ? f(url) : f;
  2101.   },
  2102. };
  2103.  
  2104. const Remoting = {
  2105.  
  2106.   gmXhr(url, opts = {}) {
  2107.     if (ai.req)
  2108.       tryCatch.call(ai.req, ai.req.abort);
  2109.     return new Promise((resolve, reject) => {
  2110.       ai.req = GM_xmlhttpRequest({
  2111.         url,
  2112.         method: 'GET',
  2113.         anonymous: (ai.rule || {}).anonymous,
  2114.         timeout: 30e3,
  2115.         ...opts,
  2116.         onload: done,
  2117.         onerror: done,
  2118.         ontimeout() {
  2119.           ai.req = null;
  2120.           reject(`Timeout fetching ${url}`);
  2121.         },
  2122.       });
  2123.       function done(r) {
  2124.         ai.req = null;
  2125.         if (r.status < 400 && !r.error)
  2126.           resolve(r);
  2127.         else
  2128.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2129.       }
  2130.     });
  2131.   },
  2132.  
  2133.   async getDoc(url) {
  2134.     const r = await (!ai.post ?
  2135.       Remoting.gmXhr(url) :
  2136.       Remoting.gmXhr(url, {
  2137.         method: 'POST',
  2138.         data: ai.post,
  2139.         headers: {
  2140.           'Content-Type': 'application/x-www-form-urlencoded',
  2141.           'Referer': url,
  2142.         },
  2143.       }));
  2144.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2145.     return r;
  2146.   },
  2147.  
  2148.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2149.     ai.bufBar = false;
  2150.     ai.bufStart = now();
  2151.     const response = await Remoting.gmXhr(url, {
  2152.       responseType: 'blob',
  2153.       headers: {
  2154.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2155.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2156.       },
  2157.       onprogress: Remoting.getImageProgress,
  2158.     });
  2159.     Bar.set(false);
  2160.     const type = Remoting.guessMimeType(response);
  2161.     let b = response.response;
  2162.     if (!b) throw 'Empty response';
  2163.     if (b.type !== type)
  2164.       b = b.slice(0, b.size, type);
  2165.     return [
  2166.       xhr === 'blob' ? URL.createObjectURL(b) : await Remoting.blobToDataUrl(b),
  2167.       type.startsWith('video'),
  2168.     ];
  2169.   },
  2170.  
  2171.   getImageProgress(e) {
  2172.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2173.       ai.bufBar = true;
  2174.     if (ai.bufBar) {
  2175.       const pct = e.loaded / e.total * 100 | 0;
  2176.       const size = e.total / 1024 | 0;
  2177.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2178.     }
  2179.   },
  2180.  
  2181.   async findRedirect() {
  2182.     try {
  2183.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2184.         method: 'HEAD',
  2185.         headers: {
  2186.           'Referer': location.href.split('#', 1)[0],
  2187.         },
  2188.       });
  2189.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2190.       if (!info || !info.url)
  2191.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2192.       Object.assign(ai, info);
  2193.       App.startSingle();
  2194.     } catch (e) {
  2195.       App.handleError(e);
  2196.     }
  2197.   },
  2198.  
  2199.   async saveFile() {
  2200.     const url = ai.popup.src || ai.popup.currentSrc;
  2201.     let name = Remoting.getFileName(ai.imageUrl || url);
  2202.     if (!name.includes('.'))
  2203.       name += '.jpg';
  2204.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2205.       $create('a', {href: url, download: name})
  2206.         .dispatchEvent(new MouseEvent('click'));
  2207.     } else {
  2208.       Status.set('+loading');
  2209.       const onload = () => Status.set('-loading');
  2210.       GM_download({
  2211.         url,
  2212.         name,
  2213.         headers: {Referer: url},
  2214.         onerror: e => {
  2215.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2216.           onload();
  2217.         },
  2218.         onprogress: Remoting.getImageProgress,
  2219.         onload,
  2220.       });
  2221.     }
  2222.   },
  2223.  
  2224.   getFileName(url) {
  2225.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2226.   },
  2227.  
  2228.   blobToDataUrl(blob) {
  2229.     return new Promise((resolve, reject) => {
  2230.       const fr = new FileReader();
  2231.       fr.onload = () => resolve(fr.result);
  2232.       fr.onerror = reject;
  2233.       fr.readAsDataURL(blob);
  2234.     });
  2235.   },
  2236.  
  2237.   guessMimeType({responseHeaders, finalUrl}) {
  2238.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2239.         !RegExp.$1.includes('text/plain'))
  2240.       return RegExp.$1;
  2241.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2242.     switch (ext.toLowerCase()) {
  2243.       case 'bmp': return 'image/bmp';
  2244.       case 'gif': return 'image/gif';
  2245.       case 'jpe': return 'image/jpeg';
  2246.       case 'jpeg': return 'image/jpeg';
  2247.       case 'jpg': return 'image/jpeg';
  2248.       case 'mp4': return 'video/mp4';
  2249.       case 'png': return 'image/png';
  2250.       case 'svg': return 'image/svg+xml';
  2251.       case 'tif': return 'image/tiff';
  2252.       case 'tiff': return 'image/tiff';
  2253.       case 'webm': return 'video/webm';
  2254.       default: return 'application/octet-stream';
  2255.     }
  2256.   },
  2257.  
  2258.   findImageUrl(n, url) {
  2259.     if (!n) return;
  2260.     let html;
  2261.     const path =
  2262.       n.getAttribute('src') ||
  2263.       n.getAttribute('data-m4v') ||
  2264.       n.getAttribute('href') ||
  2265.       n.getAttribute('content') ||
  2266.       (html = n.outerHTML).includes('http') &&
  2267.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2268.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2269.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2270.   },
  2271. };
  2272.  
  2273. const Status = {
  2274.  
  2275.   set(status) {
  2276.     if (!status && !cfg.globalStatus) {
  2277.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2278.       return;
  2279.     }
  2280.     const prefix = cfg.globalStatus ? PREFIX : '';
  2281.     const action = status && /^[+-]/.test(status) && status[0];
  2282.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2283.     const el = cfg.globalStatus ? doc.documentElement :
  2284.       name === 'edge' ? ai.popup :
  2285.         ai.node;
  2286.     if (!el) return;
  2287.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2288.     const oldValue = (el.getAttribute(attr) || '').trim();
  2289.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2290.     switch (action) {
  2291.       case '-':
  2292.         cls.delete(name);
  2293.         break;
  2294.       case false:
  2295.         for (const c of cls)
  2296.           if (c.startsWith(prefix) && c !== name)
  2297.             cls.delete(c);
  2298.       // fallthrough to +
  2299.       case '+':
  2300.         if (name)
  2301.           cls.add(name);
  2302.         break;
  2303.     }
  2304.     const newValue = [...cls].join(' ');
  2305.     if (newValue !== oldValue)
  2306.       el.setAttribute(attr, newValue);
  2307.   },
  2308.  
  2309.   loading(force) {
  2310.     if (!force) {
  2311.       clearTimeout(ai.timerStatus);
  2312.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2313.     } else if (!ai.popupLoaded) {
  2314.       Status.set('+loading');
  2315.     }
  2316.   },
  2317. };
  2318.  
  2319. const UrlMatcher = (() => {
  2320.   // string-to-regexp escaped chars
  2321.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2322.   // rx for '^' symbol in simple url match
  2323.   const RX_SEP = /[^\w%._-]/y;
  2324.   const RXS_SEP = RX_SEP.source;
  2325.   return match => {
  2326.     const results = [];
  2327.     for (const s of ensureArray(match)) {
  2328.       const pinDomain = s.startsWith('||');
  2329.       const pinStart = !pinDomain && s.startsWith('|');
  2330.       const endSep = s.endsWith('^');
  2331.       let fn;
  2332.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2333.       if (needle.includes('^')) {
  2334.         let plain = '';
  2335.         for (const part of needle.split('^'))
  2336.           if (part.length > plain.length)
  2337.             plain = part;
  2338.         const rx = new RegExp(
  2339.           (pinStart ? '^' : '') +
  2340.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2341.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2342.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2343.         needle = [plain, rx];
  2344.         fn = regexp;
  2345.       } else if (pinStart) {
  2346.         fn = endSep ? equals : starts;
  2347.       } else if (pinDomain) {
  2348.         const slashPos = needle.indexOf('/');
  2349.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2350.         needle = [needle, domain, slashPos > 0, endSep];
  2351.         fn = startsDomainPrescreen;
  2352.       } else if (endSep) {
  2353.         fn = ends;
  2354.       } else {
  2355.         fn = has;
  2356.       }
  2357.       results.push({fn, data: needle});
  2358.     }
  2359.     return results.length > 1 ?
  2360.       {fn: checkArray, data: results} :
  2361.       results[0];
  2362.   };
  2363.   function checkArray(s) {
  2364.     return this.some(checkArrayItem, s);
  2365.   }
  2366.   function checkArrayItem(item) {
  2367.     return item.fn.call(item.data, this);
  2368.   }
  2369.   function ends(s) {
  2370.     return s.endsWith(this) || (
  2371.       s.length > this.length &&
  2372.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2373.       endsWithSep(s));
  2374.   }
  2375.   function endsWithSep(s, pos = s.length - 1) {
  2376.     RX_SEP.lastIndex = pos;
  2377.     return RX_SEP.test(s);
  2378.   }
  2379.   function equals(s) {
  2380.     return s.startsWith(this) && (
  2381.       s.length === this.length ||
  2382.       s.length === this.length + 1 && endsWithSep(s));
  2383.   }
  2384.   function has(s) {
  2385.     return s.includes(this);
  2386.   }
  2387.   function regexp(s) {
  2388.     return s.includes(this[0]) && this[1].test(s);
  2389.   }
  2390.   function starts(s) {
  2391.     return s.startsWith(this);
  2392.   }
  2393.   function startsDomainPrescreen(url) {
  2394.     return url.includes(this[0]) && startsDomain.call(this, url);
  2395.   }
  2396.   function startsDomain(url) {
  2397.     let hostStart = url.indexOf('//');
  2398.     if (hostStart && url[hostStart - 1] !== ':')
  2399.       return;
  2400.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2401.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2402.     const [needle, domain, pinDomainEnd, endSep] = this;
  2403.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2404.     for (; ; start++) {
  2405.       start = host.indexOf(domain, start);
  2406.       if (start < 0)
  2407.         return;
  2408.       if (!start || host[start - 1] === '.')
  2409.         break;
  2410.     }
  2411.     start += hostStart;
  2412.     if (url.lastIndexOf(needle, start) !== start)
  2413.       return;
  2414.     const end = start + needle.length;
  2415.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2416.   }
  2417. })();
  2418.  
  2419. const Util = {
  2420.  
  2421.   addStyle(name, css) {
  2422.     const id = `${PREFIX}style:${name}`;
  2423.     const el = doc.getElementById(id) ||
  2424.                css && $create('style', {id});
  2425.     if (!el) return;
  2426.     if (el.textContent !== css)
  2427.       el.textContent = css;
  2428.     if (el.parentElement !== doc.head)
  2429.       doc.head.appendChild(el);
  2430.     return el;
  2431.   },
  2432.  
  2433.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2434.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2435.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2436.   },
  2437.  
  2438.   decodeHtmlEntities(s) {
  2439.     return s
  2440.       .replace(/&quot;/g, '"')
  2441.       .replace(/&apos;/g, '\'')
  2442.       .replace(/&lt;/g, '<')
  2443.       .replace(/&gt;/g, '>')
  2444.       .replace(/&amp;/g, '&');
  2445.   },
  2446.  
  2447.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2448.   decodeUrl(url) {
  2449.     if (!url) return url;
  2450.     const iPct = url.indexOf('%');
  2451.     const iColon = url.indexOf(':');
  2452.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2453.       decodeURIComponent(url) :
  2454.       url;
  2455.   },
  2456.  
  2457.   deepEqual(a, b) {
  2458.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2459.       return a === b;
  2460.     if (Array.isArray(a)) {
  2461.       return Array.isArray(b) &&
  2462.         a.length === b.length &&
  2463.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2464.     }
  2465.     const keys = Object.keys(a);
  2466.     return keys.length === Object.keys(b).length &&
  2467.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2468.   },
  2469.  
  2470.   forceLayout(node) {
  2471.     // eslint-disable-next-line no-unused-expressions
  2472.     node.clientHeight;
  2473.   },
  2474.  
  2475.   formatError(e, rule) {
  2476.     const message =
  2477.       e.message ||
  2478.       e.readyState && 'Request failed.' ||
  2479.       e.type === 'error' && `File can't be displayed.${
  2480.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2481.       }` ||
  2482.       e;
  2483.     const m = [
  2484.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2485.       ['', 'font-weight:normal;color:unset'],
  2486.     ];
  2487.     m.push(...[
  2488.       ['Node: %o', ai.node],
  2489.       ['Rule: %o', rule],
  2490.       ai.url && ['URL: %s', ai.url],
  2491.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2492.     ].filter(Boolean));
  2493.     return {
  2494.       message,
  2495.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2496.       consoleArgs: m.map(([, v]) => v),
  2497.     };
  2498.   },
  2499.  
  2500.   isHovered(el) {
  2501.     // doesn't work in image tabs, browser bug?
  2502.     return App.isImageTab || el.closest(':hover');
  2503.   },
  2504.  
  2505.   isVideoUrl(url) {
  2506.     return url.startsWith('data:video') ||
  2507.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2508.   },
  2509.  
  2510.   newFunction(...args) {
  2511.     try {
  2512.       return App.NOP || new Function(...args);
  2513.     } catch (e) {
  2514.       if (!e.message.includes('unsafe-eval'))
  2515.         throw e;
  2516.       App.NOP = () => {};
  2517.       return App.NOP;
  2518.     }
  2519.   },
  2520.  
  2521.   rel2abs(rel, abs = location.href) {
  2522.     try {
  2523.       return rel.startsWith('data:') ? rel :
  2524.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2525.           new URL(rel, abs).href;
  2526.     } catch (e) {
  2527.       return rel;
  2528.     }
  2529.   },
  2530.  
  2531.   stringify(...args) {
  2532.     const p = Array.prototype;
  2533.     const {toJSON} = p;
  2534.     if (toJSON) p.toJSON = null;
  2535.     const res = JSON.stringify(...args);
  2536.     if (toJSON) p.toJSON = toJSON;
  2537.     return res;
  2538.   },
  2539.  
  2540.   suppressTooltip() {
  2541.     for (const node of [
  2542.       ai.node.parentNode,
  2543.       ai.node,
  2544.       ai.node.firstElementChild,
  2545.     ]) {
  2546.       const t = (node || 0).title;
  2547.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2548.         ai.tooltip = {node, text: t};
  2549.         node.title = '';
  2550.         break;
  2551.       }
  2552.     }
  2553.   },
  2554.  
  2555.   tabFixUrl() {
  2556.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2557.            navigator.userAgent.includes('Gecko/') &&
  2558.            flattenHtml(`data:text/html;charset=utf8,
  2559.       <style>
  2560.         body {
  2561.           margin: 0;
  2562.           padding: 0;
  2563.           background: #222;
  2564.         }
  2565.         .fit {
  2566.           overflow: hidden
  2567.         }
  2568.         .fit > img {
  2569.           max-width: 100vw;
  2570.           max-height: 100vh;
  2571.         }
  2572.         body > img {
  2573.           margin: auto;
  2574.           position: absolute;
  2575.           left: 0;
  2576.           right: 0;
  2577.           top: 0;
  2578.           bottom: 0;
  2579.         }
  2580.       </style>
  2581.       <body class=fit>
  2582.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2583.       </body>
  2584.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2585.   },
  2586. };
  2587.  
  2588. function setup({rule} = {}) {
  2589.   if (typeof doc.body.attachShadow !== 'function') {
  2590.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2591.           'You can edit the script\'s storage directly in your userscript manager.');
  2592.     return;
  2593.   }
  2594.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2595.   let uiCfg;
  2596.   let root = (elConfig || 0).shadowRoot;
  2597.   let {blankRuleElement} = setup;
  2598.   /** @type NodeList */
  2599.   const UI = new Proxy({}, {
  2600.     get(_, id) {
  2601.       return root.getElementById(id);
  2602.     },
  2603.   });
  2604.   if (!rule || !elConfig)
  2605.     init(new Config({save: true}));
  2606.   if (rule)
  2607.     installRule(rule);
  2608.  
  2609.   function init(data) {
  2610.     uiCfg = data;
  2611.     $remove(elConfig);
  2612.     elConfig = $create('div', {contentEditable: true});
  2613.     root = elConfig.attachShadow({mode: 'open'});
  2614.     root.innerHTML = createConfigHtml();
  2615.     initEvents();
  2616.     renderAll();
  2617.     renderCustomScales();
  2618.     renderRules();
  2619.     doc.body.appendChild(elConfig);
  2620.     requestAnimationFrame(() => {
  2621.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2622.     });
  2623.   }
  2624.  
  2625.   function initEvents() {
  2626.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2627.     UI._export.onclick = e => {
  2628.       dropEvent(e);
  2629.       GM_setClipboard(Util.stringify(collectConfig(), null, '  '));
  2630.       UI._exportNotification.hidden = false;
  2631.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2632.     };
  2633.     UI._import.onclick = e => {
  2634.       dropEvent(e);
  2635.       const s = prompt('Paste settings:');
  2636.       if (s)
  2637.         init(new Config({data: s}));
  2638.     };
  2639.     UI._install.onclick = setupRuleInstaller;
  2640.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2641.     UI._reveal.onclick = e => {
  2642.       e.preventDefault();
  2643.       cssApp.hidden = !cssApp.hidden;
  2644.       if (!cssApp.hidden) {
  2645.         if (!cssApp.value) {
  2646.           App.updateStyles();
  2647.           cssApp.value = App.globalStyle.trim();
  2648.           cssApp.setSelectionRange(0, 0);
  2649.         }
  2650.         cssApp.focus();
  2651.       }
  2652.     };
  2653.     UI.start.onchange = function () {
  2654.       UI.delay.closest('label').hidden =
  2655.         UI.preload.closest('label').hidden =
  2656.           this.value !== 'auto';
  2657.     };
  2658.     UI.start.onchange();
  2659.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2660.     // color
  2661.     for (const el of $$('[type="color"]', root)) {
  2662.       el.oninput = colorOnInput;
  2663.       el.elSwatch = el.nextElementSibling;
  2664.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2665.       el.elOpacity.elColor = el;
  2666.     }
  2667.     function colorOnInput() {
  2668.       this.elSwatch.style.setProperty('--color',
  2669.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2670.     }
  2671.     // range
  2672.     for (const el of $$('[type="range"]', root)) {
  2673.       el.oninput = rangeOnInput;
  2674.       el.onblur = rangeOnBlur;
  2675.       el.addEventListener('focusin', rangeOnFocus);
  2676.     }
  2677.     function rangeOnBlur(e) {
  2678.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2679.         this.elEdit.onblur(e);
  2680.     }
  2681.     function rangeOnFocus() {
  2682.       if (this.elEdit) return;
  2683.       const {min, max, step, value} = this;
  2684.       this.elEdit = $create('input', {
  2685.         value, min, max, step,
  2686.         className: 'range-edit',
  2687.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2688.         type: 'number',
  2689.         elRange: this,
  2690.         onblur: rangeEditOnBlur,
  2691.         oninput: rangeEditOnInput,
  2692.       });
  2693.       this.insertAdjacentElement('afterend', this.elEdit);
  2694.     }
  2695.     function rangeOnInput() {
  2696.       this.title = (this.dataset.title || '').replace('$', this.value);
  2697.       if (this.elColor) this.elColor.oninput();
  2698.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2699.     }
  2700.     // range-edit
  2701.     function rangeEditOnBlur(e) {
  2702.       if (e.relatedTarget !== this.elRange) {
  2703.         this.remove();
  2704.         this.elRange.elEdit = null;
  2705.       }
  2706.     }
  2707.     function rangeEditOnInput() {
  2708.       this.elRange.valueAsNumber = this.valueAsNumber;
  2709.       this.elRange.oninput();
  2710.     }
  2711.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2712.     // which may happen since it sees only the outer <div> in the event |target|
  2713.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2714.   }
  2715.  
  2716.   function closeSetup(event) {
  2717.     const isApply = this.id === '_apply';
  2718.     if (event && (this.id === '_ok' || isApply)) {
  2719.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2720.       Ruler.init();
  2721.       if (isApply) {
  2722.         renderCustomScales();
  2723.         UI._css.textContent = cfg._getCss();
  2724.         return;
  2725.       }
  2726.     }
  2727.     $remove(elConfig);
  2728.     elConfig = null;
  2729.   }
  2730.  
  2731.   function collectConfig({save, clone} = {}) {
  2732.     let data = {};
  2733.     for (const el of $$('input[id], select[id]', root))
  2734.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2735.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2736.           el.value || '';
  2737.     Object.assign(data, {
  2738.       css: UI.css.value.trim(),
  2739.       delay: UI.delay.valueAsNumber * 1000,
  2740.       hosts: collectRules(),
  2741.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2742.       scales: UI.scales.value
  2743.         .trim()
  2744.         .split(/[,;]*\s+/)
  2745.         .map(x => x.replace(',', '.'))
  2746.         .filter(x => !isNaN(parseFloat(x))),
  2747.     });
  2748.     if (clone)
  2749.       data = JSON.parse(Util.stringify(data));
  2750.     return new Config({data, save});
  2751.   }
  2752.  
  2753.   function collectRules() {
  2754.     return [...UI._rules.children]
  2755.       .map(el => [el.value.trim(), el[RULE]])
  2756.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2757.       .map(([s, json]) => json || s)
  2758.       .filter(Boolean);
  2759.   }
  2760.  
  2761.   function checkRule({target: el}) {
  2762.     let json, error, title;
  2763.     const prev = el.previousElementSibling;
  2764.     if (el.value) {
  2765.       json = Ruler.parse(el.value);
  2766.       error = json instanceof Error && (json.message || String(json));
  2767.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2768.         !/^[-.a-z0-9]*$/i.test(json.d);
  2769.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2770.         .filter(Boolean).join('\n');
  2771.       el.classList.toggle('invalid-domain', invalidDomain);
  2772.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  2773.       if (!prev)
  2774.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2775.     } else if (prev) {
  2776.       prev.focus();
  2777.       el.remove();
  2778.     }
  2779.     el[RULE] = !error && json;
  2780.     el.title = title;
  2781.     el.setCustomValidity(error || '');
  2782.   }
  2783.  
  2784.   function focusRule({type, target: el, relatedTarget: from}) {
  2785.     if (el === this)
  2786.       return;
  2787.     if (type === 'paste') {
  2788.       setTimeout(() => focusRule.call(this, {target: el}));
  2789.       return;
  2790.     }
  2791.     if (el[RULE])
  2792.       el.value = Ruler.format(el[RULE], {expand: true});
  2793.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2794.     if (h > el.offsetHeight)
  2795.       el.style.minHeight = h + 'px';
  2796.     if (!this.contains(from))
  2797.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2798.     if (from) {
  2799.       from.style.minHeight = '';
  2800.       if (from[RULE])
  2801.         from.value = Ruler.format(from[RULE]);
  2802.     }
  2803.   }
  2804.  
  2805.   function installRule(rule) {
  2806.     const inputs = UI._rules.children;
  2807.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2808.     if (!el) {
  2809.       el = inputs[0];
  2810.       el[RULE] = rule;
  2811.       el.value = Ruler.format(rule);
  2812.       el.hidden = false;
  2813.       const i = Math.max(0, collectRules().indexOf(rule));
  2814.       inputs[i].insertAdjacentElement('afterend', el);
  2815.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2816.     }
  2817.     const rect = el.getBoundingClientRect();
  2818.     if (rect.bottom < 0 ||
  2819.         rect.bottom > el.parentNode.offsetHeight)
  2820.       el.scrollIntoView();
  2821.     el.classList.add('highlight');
  2822.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2823.     el.focus();
  2824.   }
  2825.  
  2826.   function renderRules() {
  2827.     const rules = UI._rules;
  2828.     rules.addEventListener('input', checkRule);
  2829.     rules.addEventListener('focusin', focusRule);
  2830.     rules.addEventListener('paste', focusRule);
  2831.     blankRuleElement =
  2832.       setup.blankRuleElement =
  2833.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2834.     for (const rule of uiCfg.hosts || []) {
  2835.       const el = blankRuleElement.cloneNode();
  2836.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2837.       rules.appendChild(el);
  2838.       checkRule({target: el});
  2839.     }
  2840.     const search = UI._search;
  2841.     search.oninput = () => {
  2842.       setup.search = search.value;
  2843.       const s = search.value.toLowerCase();
  2844.       for (const el of rules.children)
  2845.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2846.     };
  2847.     search.value = setup.search || '';
  2848.     if (search.value)
  2849.       search.oninput();
  2850.   }
  2851.  
  2852.   function renderCustomScales() {
  2853.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2854.   }
  2855.  
  2856.   function renderAll() {
  2857.     for (const el of $$('input[id], select[id], textarea[id]', root))
  2858.       if (el.id in uiCfg)
  2859.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  2860.     for (const el of $$('input[type="range"]', root))
  2861.       el.oninput();
  2862.     for (const el of $$('a[href^="http"]', root))
  2863.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  2864.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  2865.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  2866.   }
  2867. }
  2868.  
  2869. function setupClickedRule(event) {
  2870.   let rule;
  2871.   const el = event.target.closest('blockquote, code, pre');
  2872.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  2873.     dropEvent(event);
  2874.     setup({rule});
  2875.   }
  2876. }
  2877.  
  2878. async function setupRuleInstaller(e) {
  2879.   dropEvent(e);
  2880.   const parent = this.parentElement;
  2881.   parent.children._installLoading.hidden = false;
  2882.   this.remove();
  2883.   let rules;
  2884.  
  2885.   try {
  2886.     rules = extractRules(await Remoting.getDoc(this.href));
  2887.     const selector = $create('select', {
  2888.       size: 8,
  2889.       style: 'width: 100%',
  2890.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2891.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2892.     });
  2893.     selector.append(...rules.map(renderRule));
  2894.     selector.selectedIndex = findMatchingRuleIndex();
  2895.     parent.children._installLoading.remove();
  2896.     parent.children._installHint.hidden = false;
  2897.     parent.appendChild(selector);
  2898.     requestAnimationFrame(() => {
  2899.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  2900.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  2901.       selector.focus();
  2902.     });
  2903.   } catch (e) {
  2904.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2905.   }
  2906.  
  2907.   function extractRules({doc}) {
  2908.     // sort by name
  2909.     return [...$$('#wiki-body tr', doc)]
  2910.       .map(tr => [
  2911.         tr.cells[0].textContent.trim(),
  2912.         Ruler.fromElement(tr.cells[1]),
  2913.       ])
  2914.       .filter(([name, r]) =>
  2915.         name && r && (!r.d || hostname.includes(r.d)))
  2916.       .sort(([a], [b]) =>
  2917.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  2918.           a > b ? 1 :
  2919.             0);
  2920.   }
  2921.  
  2922.   function findMatchingRuleIndex() {
  2923.     const dottedHost = `.${hostname}.`;
  2924.     let maxCount = 0, maxIndex = 0, index = 0;
  2925.     for (const [name, {d}] of rules) {
  2926.       let count = !!(d && hostname.includes(d)) * 10;
  2927.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  2928.         count += dottedHost.includes(`.${part}.`) && part.length;
  2929.       if (count > maxCount) {
  2930.         maxCount = count;
  2931.         maxIndex = index;
  2932.       }
  2933.       index++;
  2934.     }
  2935.     return maxIndex;
  2936.   }
  2937.  
  2938.   function renderRule([name, rule]) {
  2939.     return $create('option', {
  2940.       textContent: name,
  2941.       title: Ruler.format(rule, {expand: true})
  2942.         .replace(/^{|\s*}$/g, '')
  2943.         .split('\n')
  2944.         .slice(0, 12)
  2945.         .map(renderTitleLine)
  2946.         .filter(Boolean)
  2947.         .join('\n'),
  2948.     });
  2949.   }
  2950.  
  2951.   function renderTitleLine(line, i, arr) {
  2952.     return (
  2953.       // show ... on 10th line if there are more lines
  2954.       i === 9 && arr.length > 10 ? '...' :
  2955.         i > 10 ? '' :
  2956.           // truncate to 100 chars
  2957.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  2958.             // strip the leading space
  2959.             .replace(/^\s/, ''));
  2960.   }
  2961.  
  2962.   function maybeSetup(e) {
  2963.     if (!eventModifiers(e))
  2964.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  2965.   }
  2966. }
  2967.  
  2968. function createConfigHtml() {
  2969.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/Rules';
  2970.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  2971.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  2972.   return flattenHtml(`
  2973. <style>
  2974.   :host {
  2975.     all: initial !important;
  2976.     position: fixed !important;
  2977.     z-index: 2147483647 !important;
  2978.     top: 20px !important;
  2979.     right: 20px !important;
  2980.     padding: 1.5em !important;
  2981.     color: #000 !important;
  2982.     background: #eee !important;
  2983.     box-shadow: 5px 5px 25px 2px #000 !important;
  2984.     width: 32em !important;
  2985.     border: 1px solid black !important;
  2986.     display: flex !important;
  2987.     flex-direction: column !important;
  2988.   }
  2989.   main {
  2990.     font: 12px/15px sans-serif;
  2991.   }
  2992.   ul {
  2993.     max-height: calc(100vh - 200px);
  2994.     margin: 10px 0 15px 0;
  2995.     padding: 0;
  2996.     list-style: none;
  2997.   }
  2998.   li {
  2999.     margin: 0;
  3000.     padding: .25em 0;
  3001.   }
  3002.   li.options {
  3003.     display: flex;
  3004.     align-items: center;
  3005.     justify-content: space-between;
  3006.   }
  3007.   li.row {
  3008.     flex-wrap: wrap;
  3009.     justify-content: flex-start;
  3010.   }
  3011.   li.row label {
  3012.     flex-direction: row;
  3013.     align-items: center;
  3014.   }
  3015.   li.row input {
  3016.     margin-right: .25em;
  3017.   }
  3018.   li.stretch label {
  3019.     flex: 1;
  3020.     white-space: nowrap;
  3021.   }
  3022.   li.stretch label > span {
  3023.     display: flex;
  3024.     flex-direction: row;
  3025.     flex: 1;
  3026.   }
  3027.   label {
  3028.     display: inline-flex;
  3029.     flex-direction: column;
  3030.   }
  3031.   label:not(:last-child) {
  3032.     margin-right: 1em;
  3033.   }
  3034.   input, select {
  3035.     min-height: 1.6em;
  3036.     box-sizing: border-box;
  3037.   }
  3038.   input[type=checkbox] {
  3039.     margin-left: 0;
  3040.   }
  3041.   input[type=number] {
  3042.     width: 4em;
  3043.   }
  3044.   input:not([type=checkbox])  {
  3045.     padding: 0 .25em;
  3046.   }
  3047.   input[type=range] {
  3048.     flex: 1;
  3049.     width: 100%;
  3050.     margin: 0 .25em;
  3051.     padding: 0;
  3052.     filter: saturate(0);
  3053.     opacity: .5;
  3054.   }
  3055.   u + input[type=range] {
  3056.     max-width: 3em;
  3057.   }
  3058.   input[type=range]:hover {
  3059.     filter: none;
  3060.     opacity: 1;
  3061.   }
  3062.   input[type=color] {
  3063.     position: absolute;
  3064.     width: calc(1.5em + 2px);
  3065.     opacity: 0;
  3066.     cursor: pointer;
  3067.   }
  3068.   u {
  3069.     display: inline-block;
  3070.     position: relative;
  3071.     width: 1.5em;
  3072.     height: 1.5em;
  3073.     border: 1px solid #888;
  3074.     pointer-events: none;
  3075.     color: #888;
  3076.     background-image:
  3077.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3078.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3079.     background-size: .5em .5em;
  3080.     background-position: 0 0, .25em .25em;
  3081.   }
  3082.   u::after {
  3083.     position: absolute;
  3084.     top: 0;
  3085.     left: 0;
  3086.     right: 0;
  3087.     bottom: 0;
  3088.     content: "";
  3089.     background-color: var(--color);
  3090.   }
  3091.   .range-edit {
  3092.     position: absolute;
  3093.     box-shadow: 0 0.25em 1em #000;
  3094.     z-index: 99;
  3095.   }
  3096.   #_rules input,
  3097.   textarea {
  3098.     flex: 1;
  3099.     resize: vertical;
  3100.     margin: 1px 0;
  3101.     font: 11px/1.25 Consolas, monospace;
  3102.   }
  3103.   :invalid {
  3104.     background-color: #f002;
  3105.     border-color: #800;
  3106.   }
  3107.   code {
  3108.     font-weight: bold;
  3109.   }
  3110.   a {
  3111.     text-decoration: none;
  3112.   }
  3113.   a:hover {
  3114.     text-decoration: underline;
  3115.   }
  3116.   button {
  3117.     padding: .2em 1em;
  3118.     margin: 0 1em;
  3119.   }
  3120.   kbd {
  3121.     padding: 1px 6px;
  3122.     font-weight: bold;
  3123.     font-family: Consolas, monospace;
  3124.     border: 1px solid #888;
  3125.     border-radius: 3px;
  3126.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3127.   }
  3128.   .column {
  3129.     display: flex;
  3130.     flex-direction: column;
  3131.   }
  3132.   .highlight {
  3133.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3134.     animation-fill-mode: both;
  3135.   }
  3136.   #_rules > * {
  3137.     word-break: break-all;
  3138.   }
  3139.   #_rules > :not(:focus) {
  3140.     overflow: hidden; /* prevents wrapping in FF */
  3141.   }
  3142.   .invalid-domain {
  3143.     opacity: .5;
  3144.   }
  3145.   .matching-domain {
  3146.     border-color: #56b8ff;
  3147.     background: #d7eaff;
  3148.   }
  3149.   #_x {
  3150.     position: absolute;
  3151.     top: 0;
  3152.     right: 0;
  3153.     padding: 4px 8px;
  3154.     cursor: pointer;
  3155.     user-select: none;
  3156.   }
  3157.   #_x:hover {
  3158.     background-color: #8884;
  3159.   }
  3160.   #_cssApp {
  3161.     color: seagreen;
  3162.   }
  3163.   #_exportNotification {
  3164.     color: green;
  3165.     font-weight: bold;
  3166.     position: absolute;
  3167.     left: 0;
  3168.     right: 0;
  3169.     bottom: 2px;
  3170.   }
  3171.   #_installHint {
  3172.     color: green;
  3173.   }
  3174.   @keyframes fade-in {
  3175.     from { background-color: deepskyblue }
  3176.     to {}
  3177.   }
  3178.   @media (prefers-color-scheme: dark) {
  3179.     :host {
  3180.       color: #aaa !important;
  3181.       background: #333 !important;
  3182.     }
  3183.     a {
  3184.       color: deepskyblue;
  3185.     }
  3186.     button {
  3187.       background: linear-gradient(-5deg, #333, #555);
  3188.       border: 1px solid #000;
  3189.       box-shadow: 0 2px 6px #181818;
  3190.       border-radius: 3px;
  3191.       cursor: pointer;
  3192.     }
  3193.     button:hover {
  3194.       background: linear-gradient(-5deg, #333, #666);
  3195.     }
  3196.     textarea, input, select {
  3197.       background: #111;
  3198.       color: #BBB;
  3199.       border: 1px solid #555;
  3200.     }
  3201.     input[type=checkbox] {
  3202.       filter: invert(1);
  3203.     }
  3204.     input[type=range] {
  3205.       filter: invert(1) saturate(0);
  3206.     }
  3207.     input[type=range]:hover {
  3208.       filter: invert(1);
  3209.     }
  3210.     kbd {
  3211.       border-color: #666;
  3212.     }
  3213.     @supports (-moz-appearance: none) {
  3214.       input[type=checkbox],
  3215.       input[type=range],
  3216.       input[type=range]:hover {
  3217.         filter: none;
  3218.       }
  3219.     }
  3220.     .range-edit {
  3221.       box-shadow: 0 .5em 1em .5em #000;
  3222.     }
  3223.     .matching-domain {
  3224.       border-color: #0065af;
  3225.       background: #032b58;
  3226.       color: #ddd;
  3227.     }
  3228.     #_cssApp {
  3229.       color: darkseagreen;
  3230.     }
  3231.     #_installHint {
  3232.       color: greenyellow;
  3233.     }
  3234.     ::-webkit-scrollbar {
  3235.       width: 14px;
  3236.       height: 14px;
  3237.       background: #333;
  3238.     }
  3239.     ::-webkit-scrollbar-button:single-button {
  3240.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3241.     }
  3242.     ::-webkit-scrollbar-track-piece {
  3243.       background: #444;
  3244.       border: 4px solid #333;
  3245.       border-radius: 8px;
  3246.     }
  3247.     ::-webkit-scrollbar-thumb {
  3248.       border: 3px solid #333;
  3249.       border-radius: 8px;
  3250.       background: #666;
  3251.     }
  3252.     ::-webkit-resizer {
  3253.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3254.       border: 2px solid transparent;
  3255.     }
  3256.   }
  3257. </style>
  3258. <style id="_css">${cfg._getCss()}</style>
  3259. <main id="${PREFIX}setup">
  3260.   <div id=_x>x</div>
  3261.   <ul class=column>
  3262.     <details style="margin: -2em 0 1em">
  3263.       <summary style="cursor:pointer"><b>Click to view help & hotkeys</b></summary>
  3264.       <table style="text-align:left">
  3265.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3266.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3267.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3268.         <tr><th>Force-activate<br>(for small pics)</th>
  3269.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3270.         <tr><td>&nbsp;</td></tr>
  3271.         <tr><th>Start zooming</th>
  3272.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3273.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3274.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3275.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3276.         <tr><th>Previous/next<br>in album</th>
  3277.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3278.         <tr><td>&nbsp;</td></tr>
  3279.         <tr><th>Download</th><td><kbd>d</kbd> key while popup is visible</td></tr>
  3280.         <tr><th>Mute/unmute</th><td><kbd>m</kbd> key while popup is visible</td></tr>
  3281.         <tr><th>Open in tab</th><td><kbd>t</kbd> key while popup is visible</td></tr>
  3282.       </table>
  3283.     </details>
  3284.     <li class=options>
  3285.       <label>Popup shows on
  3286.         <select id=start>
  3287.           <option value=auto>automatically
  3288.           <option value=context>Right click / Ctrl
  3289.           <option value=ctrl>Ctrl
  3290.         </select>
  3291.       </label>
  3292.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3293.       <label title="(if the full version of the hovered image is ...% larger)">
  3294.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3295.       </label>
  3296.       <label>Zoom activates on
  3297.         <select id=zoom>
  3298.           <option value=context>Right click / Shift
  3299.           <option value=wheel>Wheel up / Shift
  3300.           <option value=shift>Shift
  3301.           <option value=auto>automatically
  3302.         </select>
  3303.       </label>
  3304.       <label>...and zooms to
  3305.         <select id=fit>
  3306.           <option value=all>fit to window
  3307.           <option value=large>fit if larger
  3308.           <option value=no>100%
  3309.           <option value="" title="Use custom scale factors">custom
  3310.         </select>
  3311.       </label>
  3312.     </li>
  3313.     <li class=options>
  3314.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3315.       </label>
  3316.       <label>When fully zoomed out:
  3317.         <select id=zoomOut>
  3318.           <option value=stay>stay in zoom mode
  3319.           <option value=auto>stay if still hovered
  3320.           <option value=unzoom>undo zoom mode
  3321.           <option value=close>close popup
  3322.         </select>
  3323.       </label>
  3324.       <label style="flex: 1" title="${trimLeft(`
  3325.         Scale factors to use when “zooms to” selector is set to “custom”.
  3326.         0 = fit to window,
  3327.         0! = same as 0 but also removes smaller values,
  3328.         * after a value marks the default zoom factor, for example: 1*
  3329.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3330.         ${scalesHint}
  3331.       `)}">Custom scale factors:
  3332.         <input id=scales placeholder="${scalesHint}">
  3333.       </label>
  3334.     </li>
  3335.     <li class="options row">
  3336.       <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3337.         <input type=checkbox id=center>Centered*</label>
  3338.       <label title="Provides smoother experience but increases network traffic">
  3339.         <input type=checkbox id=preload>Preload on hover*</label>
  3340.       <label title="...or show a partial image while still loading">
  3341.         <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3342.       <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3343.       <label><input type=checkbox id=mute>Mute videos</label>
  3344.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3345.       <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3346.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt;*</label>
  3347.       <label title="Disable only if you spoof the HTTP headers yourself">
  3348.         <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3349.     </li>
  3350.     <li class="options stretch">
  3351.       <label>Background
  3352.         <span>
  3353.           <input id=uiBackgroundColor type=color><u></u>
  3354.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3355.         </span>
  3356.       </label>
  3357.       <label>Border color, opacity, size
  3358.         <span>
  3359.           <input id=uiBorderColor type=color><u></u>
  3360.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3361.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3362.         </span>
  3363.       </label>
  3364.       <label>Shadow color, opacity, size
  3365.         <span>
  3366.           <input id=uiShadowColor type=color><u></u>
  3367.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3368.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3369.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3370.         </span>
  3371.       </label>
  3372.       <label>Padding
  3373.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3374.       </label>
  3375.       <label>Margin
  3376.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3377.       </label>
  3378.     </li>
  3379.     <li>
  3380.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3381.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3382.       <a href="#" id=_reveal style="float: right"
  3383.          title="You can copy parts of it to override them in your custom CSS">
  3384.          View the built-in CSS</a>
  3385.       <div class=column>
  3386.         <textarea id=css spellcheck=false></textarea>
  3387.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3388.       </div>
  3389.     </li>
  3390.     <li style="display: flex; justify-content: space-between;">
  3391.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3392.       <div style="white-space: nowrap">
  3393.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3394.         in "d" value, for example <code>"d": "!foo.com"</code>
  3395.       </div>
  3396.       <div>
  3397.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3398.       </div>
  3399.     </li>
  3400.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3401.       <div id=_rules class=column>
  3402.         <textarea rows=1 spellcheck=false></textarea>
  3403.       </div>
  3404.     </li>
  3405.     <li>
  3406.       <div hidden id=_installLoading>Loading...</div>
  3407.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3408.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3409.       <a href="${MPIV_BASE_URL}" id=_install>Install rule from repository...</a>
  3410.     </li>
  3411.   </ul>
  3412.   <div style="text-align:center">
  3413.     <button id=_ok accesskey=s>OK</button>
  3414.     <button id=_apply accesskey=a>Apply</button>
  3415.     <button id=_import style="margin-right: 0">Import</button>
  3416.     <button id=_export style="margin-left: 0">Export</button>
  3417.     <button id=_cancel>Cancel</button>
  3418.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3419.   </div>
  3420. </main>`);
  3421. }
  3422.  
  3423. function createGlobalStyle() {
  3424.   App.globalStyle = /*language=CSS*/ (String.raw`
  3425. #\mpiv-bar {
  3426.   position: fixed;
  3427.   z-index: 2147483647;
  3428.   top: 0;
  3429.   left: 0;
  3430.   right: 0;
  3431.   opacity: 0;
  3432.   transition: opacity 1s ease .25s;
  3433.   text-align: center;
  3434.   font-family: sans-serif;
  3435.   font-size: 15px;
  3436.   font-weight: bold;
  3437.   background: #0005;
  3438.   color: white;
  3439.   padding: 4px 10px;
  3440.   text-shadow: .5px .5px 2px #000;
  3441. }
  3442. #\mpiv-bar.\mpiv-show {
  3443.   opacity: 1;
  3444. }
  3445. #\mpiv-bar[data-zoom]::after {
  3446.   content: " (" attr(data-zoom) ")";
  3447.   opacity: .8;
  3448. }
  3449. #\mpiv-popup.\mpiv-show {
  3450.   display: inline;
  3451. }
  3452. #\mpiv-popup {
  3453.   display: none;
  3454.   cursor: none;
  3455. ${cfg.uiFadein ? String.raw`
  3456.   animation: .2s \mpiv-fadein both;
  3457.   transition: box-shadow .25s, background-color .25s;
  3458.   ` : ''}
  3459. ${App.popupStyleBase = `
  3460.   border: none;
  3461.   box-sizing: border-box;
  3462.   position: fixed;
  3463.   z-index: 2147483647;
  3464.   padding: 0;
  3465.   margin: 0;
  3466.   top: 0;
  3467.   left: 0;
  3468.   width: auto;
  3469.   height: auto;
  3470.   transform-origin: center;
  3471.   max-width: none;
  3472.   max-height: none;
  3473. `}
  3474. }
  3475. #\mpiv-popup.\mpiv-show {
  3476.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3477.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3478.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3479.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3480. }
  3481. #\mpiv-popup.\mpiv-show[loaded] {
  3482.   background-color: ${Util.color('Background')};
  3483.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3484. }
  3485. #\mpiv-popup.\mpiv-zoom-max {
  3486.   image-rendering: pixelated;
  3487. }
  3488. #\mpiv-setup {
  3489. }
  3490. @keyframes \mpiv-fadein {
  3491.   from {
  3492.     opacity: 0;
  3493.     border-color: transparent;
  3494.   }
  3495.   to {
  3496.     opacity: 1;
  3497.   }
  3498. }
  3499. ` + (cfg.globalStatus ? String.raw`
  3500. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3501.   cursor: progress !important;
  3502. }
  3503. :root.\mpiv-edge #\mpiv-popup {
  3504.   cursor: default;
  3505. }
  3506. :root.\mpiv-error *:hover {
  3507.   cursor: not-allowed !important;
  3508. }
  3509. :root.\mpiv-ready *:hover,
  3510. :root.\mpiv-large *:hover {
  3511.   cursor: zoom-in !important;
  3512. }
  3513. :root.\mpiv-shift *:hover {
  3514.   cursor: default !important;
  3515. }
  3516. ` : String.raw`
  3517. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3518.   cursor: progress;
  3519. }
  3520. [\mpiv-status~="edge"]:hover {
  3521.   cursor: default;
  3522. }
  3523. [\mpiv-status~="error"]:hover {
  3524.   cursor: not-allowed;
  3525. }
  3526. [\mpiv-status~="ready"]:hover,
  3527. [\mpiv-status~="large"]:hover {
  3528.   cursor: zoom-in;
  3529. }
  3530. [\mpiv-status~="shift"]:hover {
  3531.   cursor: default;
  3532. }
  3533. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3534.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3535.   return App.globalStyle;
  3536. }
  3537.  
  3538. //#region Global utilities
  3539.  
  3540. const clamp = (v, min, max) =>
  3541.   v < min ? min : v > max ? max : v;
  3542.  
  3543. const compareNumbers = (a, b) =>
  3544.   a - b;
  3545.  
  3546. const flattenHtml = str =>
  3547.   str.trim().replace(/\n\s*/g, '');
  3548.  
  3549. const dropEvent = e =>
  3550.   (e.preventDefault(), e.stopPropagation());
  3551.  
  3552. const ensureArray = v =>
  3553.   Array.isArray(v) ? v : [v];
  3554.  
  3555. /** @param {KeyboardEvent} e */
  3556. const eventModifiers = e =>
  3557.   (e.altKey ? '!' : '') +
  3558.   (e.ctrlKey ? '^' : '') +
  3559.   (e.metaKey ? '#' : '') +
  3560.   (e.shiftKey ? '+' : '');
  3561.  
  3562. const now = performance.now.bind(performance);
  3563.  
  3564. const sumProps = (...props) => {
  3565.   let sum = 0;
  3566.   for (const p of props)
  3567.     sum += parseFloat(p) || 0;
  3568.   return sum;
  3569. };
  3570.  
  3571. const tryCatch = function (fn, ...args) {
  3572.   try {
  3573.     return fn.apply(this, args);
  3574.   } catch (e) {}
  3575. };
  3576.  
  3577. const $ = (sel, node = doc) =>
  3578.   node.querySelector(sel) || false;
  3579.  
  3580. const $$ = (sel, node = doc) =>
  3581.   node.querySelectorAll(sel);
  3582.  
  3583. const $create = (tag, props) =>
  3584.   Object.assign(doc.createElement(tag), props);
  3585.  
  3586. const $css = (el, props) =>
  3587.   Object.entries(props).forEach(([k, v]) =>
  3588.     el.style.setProperty(k, v, 'important'));
  3589.  
  3590. const $many = (q, doc) => {
  3591.   for (const selector of ensureArray(q)) {
  3592.     const el = selector && $(selector, doc);
  3593.     if (el)
  3594.       return el;
  3595.   }
  3596. };
  3597.  
  3598. const $prop = (sel, prop, node = doc) =>
  3599.   (node = $(sel, node)) && node[prop] || '';
  3600.  
  3601. const $propUp = (node, prop) =>
  3602.   (node = node.closest(`[${prop}]`)) &&
  3603.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3604.   '';
  3605.  
  3606. const $remove = node =>
  3607.   node && node.remove();
  3608.  
  3609. //#endregion
  3610. //#region Init
  3611.  
  3612. cfg = new Config({save: true});
  3613.  
  3614. if (window === top)
  3615.   GM_registerMenuCommand('MPIV: configure', setup);
  3616.  
  3617. if (doc.body) App.checkImageTab();
  3618. else doc.addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3619.  
  3620. doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3621. if (['gf.qytechs.cn', 'github.com'].includes(hostname))
  3622.   doc.addEventListener('click', setupClickedRule);
  3623. window.addEventListener('message', App.onMessage);
  3624.  
  3625. //#endregion

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