☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-10-03 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. //
  8. // @grant       GM_download
  9. // @grant       GM_getValue
  10. // @grant       GM_openInTab
  11. // @grant       GM_registerMenuCommand
  12. // @grant       GM_unregisterMenuCommand
  13. // @grant       GM_setClipboard
  14. // @grant       GM_setValue
  15. // @grant       GM_xmlhttpRequest
  16. //
  17. // @grant       GM.getValue
  18. // @grant       GM.openInTab
  19. // @grant       GM.registerMenuCommand
  20. // @grant       GM.unregisterMenuCommand
  21. // @grant       GM.setClipboard
  22. // @grant       GM.setValue
  23. // @grant       GM.xmlHttpRequest
  24. //
  25. // @version     1.2.7
  26. // @author      tophf
  27. //
  28. // @original-version 2017.9.29
  29. // @original-author  kuehlschrank
  30. //
  31. // @connect     *
  32. // CSP check:
  33. // @connect     self
  34. // rule installer in config dialog:
  35. // @connect     github.com
  36. // big/trusted hostings for the built-in rules with "q":
  37. // @connect     deviantart.com
  38. // @connect     facebook.com
  39. // @connect     fbcdn.com
  40. // @connect     flickr.com
  41. // @connect     gfycat.com
  42. // @connect     googleusercontent.com
  43. // @connect     gyazo.com
  44. // @connect     imgur.com
  45. // @connect     instagr.am
  46. // @connect     instagram.com
  47. // @connect     prnt.sc
  48. // @connect     prntscr.com
  49. // @connect     user-images.githubusercontent.com
  50. //
  51. // @supportURL  https://github.com/tophf/mpiv/issues
  52. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  53. // ==/UserScript==
  54.  
  55. 'use strict';
  56.  
  57. //#region Globals
  58.  
  59. /** @type mpiv.Config */
  60. let cfg;
  61. /** @type mpiv.AppInfo */
  62. let ai = {rule: {}};
  63. /** @type Element */
  64. let elConfig;
  65.  
  66. const doc = document;
  67. const hostname = location.hostname;
  68. const dotDomain = '.' + hostname;
  69. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  70. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  71. const isFF = CSS.supports('-moz-appearance', 'none');
  72. const AudioContext = window.AudioContext || function () {};
  73.  
  74. const PREFIX = 'mpiv-';
  75. const STATUS_ATTR = `${PREFIX}status`;
  76. const MSG = Object.assign({}, ...[
  77.   'getViewSize',
  78.   'viewSize',
  79. ].map(k => ({[k]: `${PREFIX}${k}`})));
  80. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  81. // time for volatile things to settle down meanwhile we postpone action
  82. // examples: loading image from cache, quickly moving mouse over one element to another
  83. const SETTLE_TIME = 50;
  84. // used to detect JS code in host rules
  85. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  86. const RX_MEDIA_URL = /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i;
  87. const ZOOM_MAX = 16;
  88. const SYM_U = Symbol('u');
  89.  
  90. //#endregion
  91. //#region GM4 polyfill
  92.  
  93. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  94.   this.GM = {info: GM_info};
  95. if (!GM.getValue)
  96.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  97. if (!GM.setValue)
  98.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  99. if (!GM.openInTab)
  100.   GM.openInTab = GM_openInTab;
  101. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  102.   GM.registerMenuCommand = GM_registerMenuCommand;
  103. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  104.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  105. if (!GM.setClipboard)
  106.   GM.setClipboard = GM_setClipboard;
  107. if (!GM.xmlHttpRequest)
  108.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  109.  
  110. //#endregion
  111.  
  112. const App = {
  113.  
  114.   isEnabled: true,
  115.   isImageTab: false,
  116.   globalStyle: '',
  117.   popupStyleBase: '',
  118.  
  119.   activate(info, event) {
  120.     const {match, node, rule, url} = info;
  121.     if (elConfig) console.info({node, rule, url, match});
  122.     if (ai.node) App.deactivate();
  123.     ai = info;
  124.     ai.force = event.ctrlKey;
  125.     ai.gNum = 0;
  126.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  127.     Util.suppressTooltip();
  128.     Calc.updateViewSize();
  129.     Events.toggle(true);
  130.     Events.trackMouse(event);
  131.     if (CspSniffer.init && location.protocol === 'https:')
  132.       CspSniffer.init();
  133.     if (ai.force) {
  134.       App.start();
  135.     } else if (cfg.start === 'auto' && !rule.manual) {
  136.       App.belate();
  137.     } else {
  138.       Status.set('ready');
  139.     }
  140.   },
  141.  
  142.   belate() {
  143.     if (cfg.preload) {
  144.       ai.preloadStart = now();
  145.       App.start();
  146.       Status.set('+preloading');
  147.       setTimeout(Status.set, cfg.delay, '-preloading');
  148.     } else {
  149.       ai.timer = setTimeout(App.start, cfg.delay);
  150.     }
  151.   },
  152.  
  153.   checkImageTab() {
  154.     const el = doc.body.firstElementChild;
  155.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  156.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  157.   },
  158.  
  159.   checkProgress({start} = {}) {
  160.     const p = ai.popup;
  161.     if (!p)
  162.       return;
  163.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  164.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  165.     if (h)
  166.       return App.canCommit(w, h);
  167.     if (start) {
  168.       clearInterval(ai.timerProgress);
  169.       ai.timerProgress = setInterval(App.checkProgress, 150);
  170.     }
  171.   },
  172.  
  173.   canCommit(w, h) {
  174.     if (!ai.force && ai.rect && !ai.gItems &&
  175.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  176.       App.deactivate();
  177.       return false;
  178.     }
  179.     App.stopTimers();
  180.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  181.     if (wait > 0) {
  182.       ai.timer = setTimeout(App.checkProgress, wait);
  183.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  184.       App.handleError({type: 'error'});
  185.     } else {
  186.       App.commit();
  187.     }
  188.     return true;
  189.   },
  190.  
  191.   async commit() {
  192.     const p = ai.popup;
  193.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  194.     if (isDecoded) {
  195.       await p.decode();
  196.       if (p !== ai.popup)
  197.         return;
  198.     }
  199.     App.updateStyles();
  200.     Calc.measurePopup();
  201.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  202.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  203.     if (willMove)
  204.       Popup.move();
  205.     Bar.updateName();
  206.     Bar.updateDetails();
  207.     Status.set(!ai.popupLoaded && 'loading');
  208.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  209.                ai.nheight > p.clientHeight + ai.extras.h;
  210.     if (ai.large) {
  211.       Status.set('+large');
  212.       // prevent a blank bg+border in FF
  213.       if (isFF && p.complete && !isDecoded)
  214.         p.style.backgroundImage = `url('${p.src}')`;
  215.     }
  216.   },
  217.  
  218.   deactivate({wait} = {}) {
  219.     App.stopTimers();
  220.     if (ai.req)
  221.       tryCatch.call(ai.req, ai.req.abort);
  222.     if (ai.tooltip)
  223.       ai.tooltip.node.title = ai.tooltip.text;
  224.     Status.set(false);
  225.     Bar.set(false);
  226.     Events.toggle(false);
  227.     Popup.destroy();
  228.     if (wait) {
  229.       App.isEnabled = false;
  230.       setTimeout(App.enable, 200);
  231.     }
  232.     ai = {rule: {}};
  233.   },
  234.  
  235.   enable() {
  236.     App.isEnabled = true;
  237.   },
  238.  
  239.   handleError(e, rule = ai.rule) {
  240.     if (rule && rule.onerror === 'skip')
  241.       return;
  242.     const fe = Util.formatError(e, rule);
  243.     if (!rule || !ai.urls || !ai.urls.length)
  244.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  245.     if (ai.urls && ai.urls.length) {
  246.       ai.url = ai.urls.shift();
  247.       if (ai.url) {
  248.         App.stopTimers();
  249.         App.startSingle();
  250.       } else {
  251.         App.deactivate();
  252.       }
  253.     } else if (ai.node) {
  254.       Status.set('error');
  255.       Bar.set(fe.message, 'error');
  256.     }
  257.   },
  258.  
  259.   /** @param {MessageEvent} e */
  260.   onMessage(e) {
  261.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  262.       for (const el of doc.getElementsByTagName('iframe')) {
  263.         if (el.contentWindow === e.source) {
  264.           const s = Calc.frameSize(el, window).join(':');
  265.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  266.           return;
  267.         }
  268.       }
  269.     }
  270.   },
  271.  
  272.   /** @param {MessageEvent} e */
  273.   onMessageChild(e) {
  274.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  275.       window.removeEventListener('message', App.onMessageChild);
  276.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  277.       if (w && h) ai.view = {w, h, x, y};
  278.     }
  279.   },
  280.  
  281.   start() {
  282.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  283.     if (!Util.isHovered(ai.node)) {
  284.       App.deactivate();
  285.       return;
  286.     }
  287.     App.updateStyles();
  288.     if (ai.gallery)
  289.       App.startGallery();
  290.     else
  291.       App.startSingle();
  292.   },
  293.  
  294.   startSingle() {
  295.     Status.loading();
  296.     ai.imageUrl = null;
  297.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  298.       Remoting.findRedirect();
  299.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  300.       App.startFromQ();
  301.     } else {
  302.       Popup.create(ai.url);
  303.       Ruler.runC();
  304.     }
  305.   },
  306.  
  307.   async startFromQ() {
  308.     try {
  309.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  310.       const url = Ruler.runQ(responseText, doc, finalUrl);
  311.       if (!url)
  312.         throw 'The "q" rule did not produce any URL.';
  313.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  314.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  315.         if (!info || !info.url)
  316.           throw `Couldn't follow URL: ${url}`;
  317.         Object.assign(ai, info);
  318.         App.startSingle();
  319.       } else {
  320.         Popup.create(url, finalUrl);
  321.         Ruler.runC(responseText, doc);
  322.       }
  323.     } catch (e) {
  324.       App.handleError(e);
  325.     }
  326.   },
  327.  
  328.   async startGallery() {
  329.     Status.loading();
  330.     try {
  331.       const startUrl = ai.url;
  332.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  333.       const items = await new Promise(resolve => {
  334.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  335.           resolve);
  336.         if (Array.isArray(it))
  337.           resolve(it);
  338.       });
  339.       // bail out if the gallery's async callback took too long
  340.       if (ai.url !== startUrl) return;
  341.       ai.gNum = items.length;
  342.       ai.gItems = items.length && items;
  343.       if (ai.gItems) {
  344.         const i = items.index;
  345.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  346.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  347.             Gallery.findIndex(ai.url);
  348.         setTimeout(Gallery.next);
  349.       } else {
  350.         throw 'Empty gallery';
  351.       }
  352.     } catch (e) {
  353.       App.handleError(e);
  354.     }
  355.   },
  356.  
  357.   stopTimers() {
  358.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  359.       clearTimeout(ai[timer]);
  360.     clearInterval(ai.timerProgress);
  361.   },
  362.  
  363.   toggleZoom({keepScale} = {}) {
  364.     const p = ai.popup;
  365.     if (!p || !ai.scales || ai.scales.length < 2)
  366.       return;
  367.     ai.zoomed = !ai.zoomed;
  368.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  369.     if (ai.zooming)
  370.       p.classList.add(`${PREFIX}zooming`);
  371.     Popup.move();
  372.     Bar.updateDetails();
  373.     Status.set(ai.zoomed ? 'zoom' : false);
  374.     return ai.zoomed;
  375.   },
  376.  
  377.   updateStyles() {
  378.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  379.     Util.addStyle('rule', ai.rule.css || '');
  380.   },
  381. };
  382.  
  383. const Bar = {
  384.  
  385.   set(label, className) {
  386.     let b = ai.bar;
  387.     if (typeof label !== 'string') {
  388.       $remove(b);
  389.       ai.bar = null;
  390.       return;
  391.     }
  392.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  393.     App.updateStyles();
  394.     Bar.updateDetails();
  395.     Bar.show();
  396.     b.innerHTML = label;
  397.     if (!b.parentNode) {
  398.       doc.body.appendChild(b);
  399.       Util.forceLayout(b);
  400.     }
  401.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  402.   },
  403.  
  404.   show(isForced) {
  405.     clearTimeout(ai.timerBar);
  406.     ai.bar.style.removeProperty('opacity');
  407.     if (isForced)
  408.       ai.bar.dataset.force = '';
  409.     else
  410.       ai.timerBar = setTimeout(Bar.hide, 3000);
  411.   },
  412.  
  413.   hide(isForced) {
  414.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  415.       $css(ai.bar, {opacity: 0});
  416.       delete ai.bar.dataset.force;
  417.     }
  418.   },
  419.  
  420.   updateName() {
  421.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  422.     if (gi) {
  423.       const item = gi[i];
  424.       const noDesc = !gi.some(_ => _.desc);
  425.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  426.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  427.         item.desc,
  428.       ].filter(Boolean).join(' - ')}`;
  429.       Bar.set(c.trim() || ' ', 'gallery', true);
  430.     } else if ('caption' in ai) {
  431.       Bar.set(ai.caption, 'caption');
  432.     } else if (ai.tooltip) {
  433.       Bar.set(ai.tooltip.text, 'tooltip');
  434.     } else {
  435.       Bar.set(' ', 'info');
  436.     }
  437.   },
  438.  
  439.   updateDetails() {
  440.     if (!ai.bar) return;
  441.     const r = ai.rotate;
  442.     const zoom = ai.nwidth && `${
  443.       Math.round(ai.scale * 100)
  444.     }%${
  445.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  446.     }${
  447.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  448.     }, ${
  449.       ai.nwidth
  450.     } x ${
  451.       ai.nheight
  452.     } px, ${
  453.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  454.     } MP, ${
  455.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  456.     }`.replace(/\x20/g, '\xA0');
  457.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  458.       if (zoom) ai.bar.dataset.zoom = zoom;
  459.       else delete ai.bar.dataset.zoom;
  460.       Bar.show();
  461.     }
  462.   },
  463. };
  464.  
  465. const Calc = {
  466.  
  467.   aspectRatio(w, h) {
  468.     for (let rat = w / h, a, b = 0; ;) {
  469.       b++;
  470.       a = Math.round(w * b / h);
  471.       if (a > 10 && b > 10 || a > 100 || b > 100)
  472.         return rat.toFixed(2);
  473.       if (Math.abs(a / b - rat) < .01)
  474.         return `${a}:${b}`;
  475.     }
  476.   },
  477.  
  478.   frameSize(elFrame, wnd) {
  479.     if (!elFrame) return;
  480.     const r = elFrame.getBoundingClientRect();
  481.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  482.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  483.     const x = r.left < 0 ? -r.left : 0;
  484.     const y = r.top < 0 ? -r.top : 0;
  485.     return [w, h, x, y];
  486.   },
  487.  
  488.   generateScales(fit) {
  489.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  490.     const zoomStep = cfg.zoomStep / 100;
  491.     const arr = [scale];
  492.     if (fit !== 1) {
  493.       const diff = goal / scale;
  494.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  495.       const step = steps && Math.pow(diff, 1 / steps);
  496.       for (let i = steps; --i > 0;)
  497.         arr.push((scale *= step));
  498.       arr.push(scale = goal);
  499.     }
  500.     while ((scale *= zoomStep) <= ZOOM_MAX)
  501.       arr.push(scale);
  502.     return arr;
  503.   },
  504.  
  505.   measurePopup() {
  506.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  507.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  508.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  509.     if (p.clientWidth > nw) {
  510.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  511.       nh = ai.nheight = w / nw * nh | 0;
  512.       nw = ai.nwidth = w;
  513.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  514.     }
  515.     p.className = `${PREFIX}show`;
  516.     p.removeAttribute('style');
  517.     const s = getComputedStyle(p);
  518.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  519.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  520.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  521.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  522.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  523.     ai.extras = {
  524.       inw, inh,
  525.       outw, outh,
  526.       o: o2 / 2,
  527.       w: inw + outw,
  528.       h: inh + outh,
  529.     };
  530.     const fit = Math.min(
  531.       (ai.view.w - ai.extras.w) / ai.nwidth,
  532.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  533.     const isCustom = !cfg.fit && cfg.scales.length;
  534.     let cutoff = Math.min(1, fit);
  535.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  536.     if (isCustom) {
  537.       const dst = [];
  538.       for (const scale of cfg.scales) {
  539.         const val = parseFloat(scale) || fit;
  540.         dst.push(val);
  541.         if (isCustom && typeof scale === 'string') {
  542.           if (scale.includes('!')) cutoff = val;
  543.           if (scale.includes('*')) scaleZoom = val;
  544.         }
  545.       }
  546.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  547.     } else {
  548.       ai.scales = Calc.generateScales(fit);
  549.     }
  550.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  551.     ai.scaleFit = fit;
  552.     ai.scaleZoom = scaleZoom;
  553.   },
  554.  
  555.   rect() {
  556.     let {node, rule} = ai;
  557.     let n = rule.rect && node.closest(rule.rect);
  558.     if (n) return n.getBoundingClientRect();
  559.     const nested = node.getElementsByTagName('*');
  560.     let maxArea = 0;
  561.     let maxBounds;
  562.     n = node;
  563.     for (let i = 0; n; n = nested[i++]) {
  564.       const bounds = n.getBoundingClientRect();
  565.       const area = bounds.width * bounds.height;
  566.       if (area > maxArea) {
  567.         maxArea = area;
  568.         maxBounds = bounds;
  569.         node = n;
  570.       }
  571.     }
  572.     return maxBounds;
  573.   },
  574.  
  575.   scaleBiggerThan(scale, i, arr) {
  576.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  577.   },
  578.  
  579.   scaleIndex(dir) {
  580.     const i = ai.scales.indexOf(ai.scale);
  581.     if (i >= 0) return i + dir;
  582.     for (
  583.       let len = ai.scales.length,
  584.         i = dir > 0 ? 0 : len - 1;
  585.       i >= 0 && i < len;
  586.       i += dir
  587.     ) {
  588.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  589.         return i;
  590.     }
  591.     return -1;
  592.   },
  593.  
  594.   scaleForFirstZoom(keepScale) {
  595.     const z = ai.scaleZoom;
  596.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  597.   },
  598.  
  599.   updateViewSize() {
  600.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  601.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  602.     if (window === top) return;
  603.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  604.     if (w && h) {
  605.       ai.view = {w, h, x: 0, y: 0};
  606.     } else {
  607.       window.addEventListener('message', App.onMessageChild);
  608.       parent.postMessage(MSG.getViewSize, '*');
  609.     }
  610.   },
  611. };
  612.  
  613. class Config {
  614.  
  615.   constructor({data: c, save}) {
  616.     if (typeof c === 'string')
  617.       c = tryCatch(JSON.parse, c);
  618.     if (typeof c !== 'object' || !c)
  619.       c = {};
  620.     const {DEFAULTS} = Config;
  621.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  622.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  623.         '';
  624.     if (c.version !== DEFAULTS.version) {
  625.       if (typeof c.hosts === 'string')
  626.         c.hosts = c.hosts.split('\n')
  627.           .map(s => tryCatch(JSON.parse, s) || s)
  628.           .filter(Boolean);
  629.       if (c.close === true || c.close === false)
  630.         c.zoomOut = c.close ? 'auto' : 'stay';
  631.       for (const key in DEFAULTS)
  632.         if (typeof c[key] !== typeof DEFAULTS[key])
  633.           c[key] = DEFAULTS[key];
  634.       if (c.version === 3 && c.scales[0] === 0)
  635.         c.scales[0] = '0!';
  636.       for (const key in c)
  637.         if (!(key in DEFAULTS))
  638.           delete c[key];
  639.       c.version = DEFAULTS.version;
  640.       if (save)
  641.         GM.setValue('cfg', c);
  642.     }
  643.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  644.       App.globalStyle = '';
  645.     if (!Array.isArray(c.scales))
  646.       c.scales = [];
  647.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  648.     Object.assign(this, DEFAULTS, c);
  649.   }
  650.  
  651.   static async load(opts) {
  652.     opts.data = await GM.getValue('cfg');
  653.     return new Config(opts);
  654.   }
  655.  
  656.   _getCss() {
  657.     const {css} = this;
  658.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  659.   }
  660. }
  661.  
  662. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  663.   center: false,
  664.   css: '',
  665.   delay: 500,
  666.   fit: '',
  667.   globalStatus: false,
  668.   // prefer ' inside rules because " will be displayed as \"
  669.   // example: "img[src*='icon']"
  670.   hosts: [{
  671.     name: 'No popup for YouTube thumbnails',
  672.     d: 'www.youtube.com',
  673.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  674.     s: '',
  675.   }, {
  676.     name: 'No popup for SVG/PNG icons',
  677.     d: '',
  678.     e: "img[src*='icon']",
  679.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  680.     s: '',
  681.   }],
  682.   imgtab: false,
  683.   mute: false,
  684.   preload: false,
  685.   scale: 1.25,
  686.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  687.   start: 'auto',
  688.   startAlt: 'context',
  689.   startAltShown: false,
  690.   uiBackgroundColor: '#ffffff',
  691.   uiBackgroundOpacity: 100,
  692.   uiBorderColor: '#000000',
  693.   uiBorderOpacity: 100,
  694.   uiBorder: 0,
  695.   uiFadein: true,
  696.   uiShadowColor: '#000000',
  697.   uiShadowOpacity: 80,
  698.   uiShadow: 20,
  699.   uiPadding: 0,
  700.   uiMargin: 0,
  701.   version: 6,
  702.   waitLoad: false,
  703.   xhr: true,
  704.   zoom: 'context',
  705.   zoomOut: 'auto',
  706.   zoomStep: 133,
  707. });
  708.  
  709. const CspSniffer = {
  710.  
  711.   /** @type {?Object<string,string[]>} */
  712.   csp: null,
  713.   /** @type {?Promise<void>} */
  714.   initPending: null,
  715.   selfUrl: location.origin + '/',
  716.  
  717.   // will be null when done
  718.   init() {
  719.     this.initPending = this.initPending ||
  720.       fetch(location).catch(() => false).then(r => { // not using method HEAD as it breaks twitter
  721.         this.csp = r && this._parse(r.headers.get('content-security-policy'));
  722.         this.init = this.initPending = null;
  723.       });
  724.   },
  725.  
  726.   async check(url) {
  727.     await this.initPending;
  728.     const isVideo = Util.isVideoUrl(url);
  729.     let mode;
  730.     if (this.csp) {
  731.       const src = this.csp[isVideo ? 'media' : 'img'];
  732.       if (!src.some(this._srcMatches, url))
  733.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  734.     }
  735.     return [mode || ai.xhr, isVideo];
  736.   },
  737.  
  738.   _parse(csp) {
  739.     if (!csp) return;
  740.     const src = {};
  741.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  742.     for (let m; (m = rx.exec(csp[1]));)
  743.       src[m[1]] = m[2].trim().split(/\s+/);
  744.     if (!src.img) src.img = src.default || [];
  745.     if (!src.media) src.media = src.default || [];
  746.     for (const set of [src.img, src.media]) {
  747.       set.forEach((item, i) => {
  748.         if (item !== '*' && item.includes('*')) {
  749.           set[i] = new RegExp(
  750.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  751.             item
  752.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  753.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  754.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  755.             .replace(/[^/]$/, '$&/'));
  756.         }
  757.       });
  758.     }
  759.     return src;
  760.   },
  761.  
  762.   /** @this string */
  763.   _srcMatches(src) {
  764.     return src instanceof RegExp ? src.test(this) :
  765.       src === '*' ||
  766.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  767.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  768.   },
  769. };
  770.  
  771. const Events = {
  772.  
  773.   hoverData: null,
  774.   hoverTimer: 0,
  775.   ignoreKeyHeld: false,
  776.  
  777.   onMouseOver(e) {
  778.     let node = e.target;
  779.     Events.ignoreKeyHeld = e.shiftKey;
  780.     if (!App.isEnabled ||
  781.         e.shiftKey ||
  782.         ai.zoomed ||
  783.         node === ai.popup ||
  784.         node === doc.body ||
  785.         node === doc.documentElement ||
  786.         node === elConfig ||
  787.         ai.gallery && ai.rectHovered)
  788.       return;
  789.     if (node.shadowRoot)
  790.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  791.     // we don't want to process everything in the path of a quickly moving mouse cursor
  792.     Events.hoverData = {e, node, start: now()};
  793.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  794.   },
  795.  
  796.   onMouseOverThrottled(force) {
  797.     if (!Events.hoverData)
  798.       return;
  799.     const {start, e, node} = Events.hoverData;
  800.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  801.     const wait = force ? 0 : start + SETTLE_TIME - now();
  802.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  803.     if (Events.hoverTimer || !Util.isHovered(node))
  804.       return;
  805.     Events.hoverData = null;
  806.     if (!Ruler.rules)
  807.       Ruler.init();
  808.     const info = RuleMatcher.adaptiveFind(node);
  809.     if (info && info.url && info.node !== ai.node)
  810.       App.activate(info, e);
  811.   },
  812.  
  813.   onMouseOut(e) {
  814.     if (!e.relatedTarget && !e.shiftKey)
  815.       App.deactivate();
  816.   },
  817.  
  818.   onMouseOutShadow(e) {
  819.     const root = e.target.shadowRoot;
  820.     if (root) {
  821.       root.removeEventListener('mouseover', Events.onMouseOver);
  822.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  823.     }
  824.   },
  825.  
  826.   onMouseMove(e) {
  827.     Events.trackMouse(e);
  828.     if (e.shiftKey)
  829.       return;
  830.     if (!ai.zoomed && !ai.rectHovered) {
  831.       App.deactivate();
  832.     } else if (ai.zoomed) {
  833.       Popup.move();
  834.       const {cx, cy, view: {w, h}} = ai;
  835.       const bx = w / 6;
  836.       const by = h / 6;
  837.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  838.       Status.set(`${onEdge ? '+' : '-'}edge`);
  839.     }
  840.   },
  841.  
  842.   onMouseDown({shiftKey, button}) {
  843.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  844.       ai.controlled = ai.zoomed = true;
  845.     } else if (button === 2 || shiftKey) {
  846.       // Shift = ignore; RMB will be processed in onContext
  847.     } else {
  848.       App.deactivate({wait: true});
  849.       doc.addEventListener('mouseup', App.enable, {once: true});
  850.     }
  851.   },
  852.  
  853.   onMouseScroll(e) {
  854.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  855.     if (ai.zoomed) {
  856.       Events.zoomInOut(dir);
  857.     } else if (ai.gNum > 1 && ai.popup) {
  858.       Gallery.next(-dir);
  859.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  860.       App.toggleZoom();
  861.     } else {
  862.       App.deactivate();
  863.       return;
  864.     }
  865.     dropEvent(e);
  866.   },
  867.  
  868.   onKeyDown(e) {
  869.     // Synthesized events may be of the wrong type and not have a `key`
  870.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  871.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  872.     if (!p &&
  873.         !Events.ignoreKeyHeld &&
  874.         key === '^Control' &&
  875.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  876.       dropEvent(e);
  877.       if (Events.hoverData) {
  878.         Events.hoverData.e = e;
  879.         Events.onMouseOverThrottled(true);
  880.       }
  881.       if (ai.node) {
  882.         ai.force = true;
  883.         App.start();
  884.       }
  885.     }
  886.     if (!p || e.repeat)
  887.       return;
  888.     switch (key) {
  889.       case '+Shift':
  890.         if (ai.shiftKeyTime)
  891.           return;
  892.         ai.shiftKeyTime = now();
  893.         Status.set('+shift');
  894.         Bar.show(true);
  895.         if (p.tagName === 'VIDEO')
  896.           p.controls = true;
  897.         return;
  898.       case 'KeyA':
  899.         if (!p.hasAttribute('data-no-aa'))
  900.           p.setAttribute('data-no-aa', '');
  901.         else
  902.           p.removeAttribute('data-no-aa');
  903.         break;
  904.       case 'ArrowRight':
  905.       case 'KeyJ':
  906.         Gallery.next(1);
  907.         break;
  908.       case 'ArrowLeft':
  909.       case 'KeyK':
  910.         Gallery.next(-1);
  911.         break;
  912.       case 'KeyD':
  913.         Remoting.saveFile();
  914.         break;
  915.       case 'KeyH': // flip horizontally
  916.       case 'KeyV': // flip vertically
  917.       case 'KeyL': // rotate left
  918.       case 'KeyR': // rotate right
  919.         if (!p)
  920.           return;
  921.         if (key === 'KeyH' || key === 'KeyV') {
  922.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  923.           ai[side] = !ai[side];
  924.         } else {
  925.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  926.         }
  927.         Bar.updateDetails();
  928.         Popup.move();
  929.         break;
  930.       case 'KeyM':
  931.         if (p.tagName === 'VIDEO')
  932.           p.muted = !p.muted;
  933.         break;
  934.       case 'KeyT':
  935.         GM.openInTab(Util.tabFixUrl() || p.src);
  936.         App.deactivate();
  937.         break;
  938.       case 'Minus':
  939.       case 'NumpadSubtract':
  940.         if (ai.zoomed) {
  941.           Events.zoomInOut(-1);
  942.         } else {
  943.           App.toggleZoom();
  944.         }
  945.         break;
  946.       case 'Equal':
  947.       case 'NumpadAdd':
  948.         if (ai.zoomed) {
  949.           Events.zoomInOut(1);
  950.         } else {
  951.           App.toggleZoom();
  952.         }
  953.         break;
  954.       case 'Escape':
  955.         App.deactivate({wait: true});
  956.         break;
  957.       case '!Alt':
  958.         return;
  959.       default:
  960.         App.deactivate({wait: true});
  961.         return;
  962.     }
  963.     dropEvent(e);
  964.   },
  965.  
  966.   onKeyUp(e) {
  967.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  968.       Status.set('-shift');
  969.       Bar.hide(true);
  970.       if ((ai.popup || {}).controls)
  971.         ai.popup.controls = false;
  972.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  973.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  974.         ai.controlled = false;
  975.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  976.         App.toggleZoom();
  977.       else
  978.         App.deactivate({wait: true});
  979.       ai.shiftKeyTime = 0;
  980.     }
  981.   },
  982.  
  983.   onContext(e) {
  984.     if (Events.ignoreKeyHeld)
  985.       return;
  986.     const p = ai.popup;
  987.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  988.       dropEvent(e);
  989.     } else if (!p && (
  990.       cfg.start === 'context' ||
  991.       cfg.start === 'contextMK' ||
  992.       cfg.start === 'contextM' && (e.button === 2) ||
  993.       cfg.start === 'contextK' && (e.button !== 2) ||
  994.       (cfg.start === 'auto' && ai.rule.manual)
  995.     )) {
  996.       // right-clicked on an image while the context menu is shown for something else
  997.       if (!ai.node && !Events.hoverData)
  998.         Events.onMouseOver(e);
  999.       Events.onMouseOverThrottled(true);
  1000.       if (ai.node) {
  1001.         ai.force = true;
  1002.         App.start();
  1003.         dropEvent(e);
  1004.       }
  1005.     } else if (p) {
  1006.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1007.     }
  1008.   },
  1009.  
  1010.   pierceShadow(node, x, y) {
  1011.     for (let root; (root = node.shadowRoot);) {
  1012.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1013.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1014.       const inner = root.elementFromPoint(x, y);
  1015.       if (!inner || inner === node)
  1016.         break;
  1017.       node = inner;
  1018.     }
  1019.     return node;
  1020.   },
  1021.  
  1022.   toggle(enable) {
  1023.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  1024.     const passive = enable ? {passive: true} : undefined;
  1025.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  1026.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  1027.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  1028.     onOff.call(doc, 'keydown', Events.onKeyDown, true); // override normal page listeners
  1029.     onOff.call(doc, 'keyup', Events.onKeyUp);
  1030.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  1031.   },
  1032.  
  1033.   trackMouse(e) {
  1034.     const cx = ai.cx = e.clientX;
  1035.     const cy = ai.cy = e.clientY;
  1036.     const r = ai.rect || (ai.rect = Calc.rect());
  1037.     ai.rectHovered =
  1038.       cx > r.left - 2 && cx < r.right + 2 &&
  1039.       cy > r.top - 2 && cy < r.bottom + 2;
  1040.   },
  1041.  
  1042.   zoomInOut(dir) {
  1043.     const i = Calc.scaleIndex(dir);
  1044.     const n = ai.scales.length;
  1045.     if (i >= 0 && i < n)
  1046.       ai.scale = ai.scales[i];
  1047.     const zo = cfg.zoomOut;
  1048.     if (i <= 0 && zo !== 'stay') {
  1049.       if (ai.scaleFit < ai.scale * .99) {
  1050.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1051.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1052.         App.deactivate({wait: true});
  1053.         return;
  1054.       }
  1055.       ai.zoomed = zo !== 'unzoom';
  1056.     } else {
  1057.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1058.     }
  1059.     if (ai.zooming)
  1060.       ai.popup.classList.add(`${PREFIX}zooming`);
  1061.     Popup.move();
  1062.     Bar.updateDetails();
  1063.   },
  1064. };
  1065.  
  1066. const Gallery = {
  1067.  
  1068.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  1069.  
  1070.   makeParser(g) {
  1071.     return (
  1072.       typeof g === 'function' ? g :
  1073.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  1074.           Gallery.defaultParser
  1075.     );
  1076.   },
  1077.  
  1078.   findIndex(gUrl) {
  1079.     const sel = gUrl.split('#')[1];
  1080.     if (!sel)
  1081.       return 0;
  1082.     if (/^\d+$/.test(sel))
  1083.       return parseInt(sel);
  1084.     for (let i = ai.gNum; i--;) {
  1085.       let {url} = ai.gItems[i];
  1086.       if (Array.isArray(url))
  1087.         url = url[0];
  1088.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1089.         return i;
  1090.     }
  1091.     return 0;
  1092.   },
  1093.  
  1094.   next(dir) {
  1095.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1096.     const item = ai.gItems[ai.gIndex];
  1097.     if (Array.isArray(item.url)) {
  1098.       ai.urls = item.url.slice(1);
  1099.       ai.url = item.url[0];
  1100.     } else {
  1101.       ai.urls = null;
  1102.       ai.url = item.url;
  1103.     }
  1104.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1105.     App.startSingle();
  1106.     Bar.updateName();
  1107.   },
  1108.  
  1109.   nextIndex(dir) {
  1110.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1111.   },
  1112.  
  1113.   defaultParser(text, doc, docUrl, m, rule) {
  1114.     const {g} = rule;
  1115.     const qEntry = g.entry;
  1116.     const qCaption = ensureArray(g.caption);
  1117.     const qImage = g.image || 'img';
  1118.     const qTitle = g.title;
  1119.     const fix =
  1120.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1121.       (s => s.trim());
  1122.     const items = [...$$(qEntry || qImage, doc)]
  1123.       .map(processEntry)
  1124.       .filter(Boolean);
  1125.     items.title = processTitle();
  1126.     items.index =
  1127.       typeof g.index === 'string' &&
  1128.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1129.       RX_HAS_CODE.test(g.index) &&
  1130.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1131.       g.index;
  1132.     return items;
  1133.  
  1134.     function processEntry(entry) {
  1135.       const item = {};
  1136.       try {
  1137.         const img = qEntry ? $(qImage, entry) : entry;
  1138.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1139.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1140.       } catch (e) {}
  1141.       return item.url && item;
  1142.     }
  1143.  
  1144.     function processCaption(selector) {
  1145.       const el = $(selector, this) ||
  1146.                  $orSelf(selector, this.previousElementSibling) ||
  1147.                  $orSelf(selector, this.nextElementSibling);
  1148.       return el && fix(el.textContent);
  1149.     }
  1150.  
  1151.     function processTitle() {
  1152.       const el = $(qTitle, doc);
  1153.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1154.     }
  1155.  
  1156.     function $orSelf(selector, el) {
  1157.       if (el && !el.matches(qEntry))
  1158.         return el.matches(selector) ? el : $(selector, el);
  1159.     }
  1160.   },
  1161. };
  1162.  
  1163. const Menu = window === top && GM.registerMenuCommand && {
  1164.   curAltName: '',
  1165.   unreg: GM.unregisterMenuCommand,
  1166.   makeAltName: () => Menu.unreg
  1167.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1168.     : 'MPIV: toggle auto-start',
  1169.   register() {
  1170.     GM.registerMenuCommand('MPIV: configure', setup);
  1171.     Menu.registerAlt();
  1172.   },
  1173.   registerAlt() {
  1174.     if (cfg.startAltShown) {
  1175.       Menu.curAltName = Menu.makeAltName();
  1176.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1177.     }
  1178.   },
  1179.   reRegisterAlt() {
  1180.     const old = Menu.curAltName;
  1181.     if (old && Menu.unreg) Menu.unreg(old);
  1182.     if (!old || Menu.unreg) Menu.registerAlt();
  1183.   },
  1184.   onAltToggled() {
  1185.     const wasAuto = cfg.start === 'auto';
  1186.     if (wasAuto) {
  1187.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1188.     } else {
  1189.       cfg.startAlt = cfg.start;
  1190.       cfg.start = 'auto';
  1191.     }
  1192.     Menu.reRegisterAlt();
  1193.   },
  1194. };
  1195.  
  1196. const Popup = {
  1197.  
  1198.   async create(src, pageUrl) {
  1199.     Popup.destroy();
  1200.     ai.imageUrl = src;
  1201.     if (!src)
  1202.       return;
  1203.     const myAi = ai;
  1204.     let [xhr, isVideo] = await CspSniffer.check(src);
  1205.     if (ai !== myAi)
  1206.       return;
  1207.     if (xhr)
  1208.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1209.     if (ai !== myAi || !src)
  1210.       return;
  1211.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1212.     p.id = `${PREFIX}popup`;
  1213.     p.src = src;
  1214.     p.addEventListener('error', App.handleError);
  1215.     if (ai.zooming)
  1216.       p.addEventListener('transitionend', Popup.onZoom);
  1217.     doc.body.insertBefore(p, ai.bar || undefined);
  1218.     await 0;
  1219.     if (App.checkProgress({start: true}) === false)
  1220.       return;
  1221.     if (p.complete)
  1222.       Popup.onLoad.call(ai.popup);
  1223.     else if (!isVideo)
  1224.       p.addEventListener('load', Popup.onLoad, {once: true});
  1225.   },
  1226.  
  1227.   destroy() {
  1228.     const p = ai.popup;
  1229.     if (!p) return;
  1230.     p.removeEventListener('load', Popup.onLoad);
  1231.     p.removeEventListener('error', App.handleError);
  1232.     if (typeof p.pause === 'function')
  1233.       p.pause();
  1234.     if (ai.blobUrl)
  1235.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1236.     p.remove();
  1237.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1238.   },
  1239.  
  1240.   move() {
  1241.     let x, y;
  1242.     const {cx, cy, extras, view} = ai;
  1243.     const vw = view.w - extras.outw;
  1244.     const vh = view.h - extras.outh;
  1245.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1246.     const h0 = ai.scale * ai.nheight + extras.inh;
  1247.     const isSwapped = ai.rotate % 180;
  1248.     const w = isSwapped ? h0 : w0;
  1249.     const h = isSwapped ? w0 : h0;
  1250.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1251.       const r = ai.rect;
  1252.       const rx = (r.left + r.right) / 2;
  1253.       const ry = (r.top + r.bottom) / 2;
  1254.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1255.         if (h < vh - 60)
  1256.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1257.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1258.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1259.         if (w < vw - 60)
  1260.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1261.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1262.       }
  1263.     }
  1264.     if (x == null) {
  1265.       x = vw > w
  1266.         ? (vw - w) / 2 + view.x
  1267.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1268.     }
  1269.     if (y == null) {
  1270.       y = vh > h
  1271.         ? (vh - h) / 2 + view.y
  1272.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1273.     }
  1274.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1275.     x += extras.o - diff;
  1276.     y += extras.o + diff;
  1277.     $css(ai.popup, {
  1278.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1279.                  `rotate(${ai.rotate || 0}deg) ` +
  1280.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1281.       width: `${Math.round(w0)}px`,
  1282.       height: `${Math.round(h0)}px`,
  1283.     });
  1284.   },
  1285.  
  1286.   onLoad() {
  1287.     if (this === ai.popup) {
  1288.       this.setAttribute('loaded', '');
  1289.       ai.popupLoaded = true;
  1290.       Status.set('-loading');
  1291.       if (ai.preloadUrl) {
  1292.         $create('img', {src: ai.preloadUrl});
  1293.         ai.preloadUrl = null;
  1294.       }
  1295.     }
  1296.   },
  1297.  
  1298.   onZoom() {
  1299.     this.classList.remove(`${PREFIX}zooming`);
  1300.   },
  1301. };
  1302.  
  1303. const PopupVideo = {
  1304.   async create() {
  1305.     ai.bufBar = false;
  1306.     ai.bufStart = now();
  1307.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1308.     return $create('video', {
  1309.       autoplay: true,
  1310.       controls: shouldMute,
  1311.       muted: shouldMute,
  1312.       loop: true,
  1313.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1314.       onprogress: PopupVideo.progress,
  1315.       oncanplaythrough: PopupVideo.progressDone,
  1316.       onvolumechange: PopupVideo.rememberVolume,
  1317.     });
  1318.   },
  1319.  
  1320.   progress() {
  1321.     const {duration} = this;
  1322.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1323.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1324.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1325.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1326.     }
  1327.   },
  1328.  
  1329.   progressDone() {
  1330.     this.onprogress = this.oncanplaythrough = null;
  1331.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1332.       Bar.set(false);
  1333.     Popup.onLoad.call(this);
  1334.   },
  1335.  
  1336.   rememberVolume() {
  1337.     GM.setValue('volume', this.volume);
  1338.   },
  1339. };
  1340.  
  1341. const Ruler = {
  1342. /*
  1343.  'u' works only with URLs so it's ignored if 'html' is true
  1344.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1345.    |foo = url or text must start with foo
  1346.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1347.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1348.  'r' is checked only if 'u' matches first
  1349. */
  1350.   init() {
  1351.     const errors = new Map();
  1352.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1353.     for (const rule of errors.keys())
  1354.       App.handleError('Invalid custom host rule:', rule);
  1355.  
  1356.     // rules that disable previewing
  1357.     const disablers = [
  1358.       dotDomain.endsWith('.stackoverflow.com') && {
  1359.         e: '.post-tag, .post-tag img',
  1360.         s: '',
  1361.       },
  1362.       {
  1363.         u: '||disqus.com/',
  1364.         s: '',
  1365.       },
  1366.     ];
  1367.  
  1368.     // optimization: a rule is created only when on domain
  1369.     const perDomain = [
  1370.       hostname.includes('startpage') && {
  1371.         r: /\boiu=(.+)/,
  1372.         s: '$1',
  1373.         follow: true,
  1374.       },
  1375.       dotDomain.endsWith('.4chan.org') && {
  1376.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1377.         q: '.op .fileText a',
  1378.         css: '#post-preview{display:none}',
  1379.       },
  1380.       hostname.includes('amazon.') && {
  1381.         r: /.+?images\/I\/.+?\./,
  1382.         s: m => {
  1383.           const uh = doc.getElementById('universal-hover');
  1384.           return uh ? '' : m[0] + 'jpg';
  1385.         },
  1386.         css: '#zoomWindow{display:none!important;}',
  1387.       },
  1388.       dotDomain.endsWith('.bing.com') && {
  1389.         e: 'a[m*="murl"]',
  1390.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1391.         s: '$1',
  1392.         html: true,
  1393.       },
  1394.       ...dotDomain.endsWith('.deviantart.com') && [{
  1395.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1396.         s: (m, node) =>
  1397.           $propUp(node, 'data-super-full-img') ||
  1398.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1399.           node.dataset.embedId && node.src,
  1400.       }, {
  1401.         e: '.dev-view-deviation img',
  1402.         s: () => [
  1403.           $('.dev-page-download').href,
  1404.           $('.dev-content-full').src,
  1405.         ].filter(Boolean),
  1406.       }, {
  1407.         e: 'a[data-hook=deviation_link]',
  1408.         q: 'link[as=image]',
  1409.       }] || [],
  1410.       dotDomain.endsWith('.dropbox.com') && {
  1411.         r: /(.+?&size_mode)=\d+(.*)/,
  1412.         s: '$1=5$2',
  1413.       },
  1414.       dotDomain.endsWith('.facebook.com') && {
  1415.         e: 'a[href*="ref=hovercard"]',
  1416.         s: (m, node) =>
  1417.           'https://www.facebook.com/photo.php?fbid=' +
  1418.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1419.         follow: true,
  1420.       },
  1421.       dotDomain.endsWith('.facebook.com') && {
  1422.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1423.         s: (m, node) =>
  1424.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1425.             decodeURIComponent(m[4]),
  1426.         html: true,
  1427.         follow: true,
  1428.       },
  1429.       dotDomain.endsWith('.flickr.com') &&
  1430.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1431.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1432.         s: m => `https://www.flickr.com/services/rest/?${
  1433.           new URLSearchParams({
  1434.             photo_id: m[1],
  1435.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1436.             method: 'flickr.photos.getSizes',
  1437.             format: 'json',
  1438.             nojsoncallback: 1,
  1439.           }).toString()}`,
  1440.         q: text => JSON.parse(text).sizes.size.pop().source,
  1441.       },
  1442.       dotDomain.endsWith('.github.com') && {
  1443.         r: new RegExp([
  1444.           /(avatars.+?&s=)\d+/,
  1445.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1446.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1447.         ].map(rx => rx.source).join('|')),
  1448.         s: m => `https://${
  1449.           m[1] ? `${m[1]}460` :
  1450.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1451.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1452.         }`,
  1453.       },
  1454.       isGoogleImages && {
  1455.         e: 'a[href*="imgres?imgurl="] img',
  1456.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1457.         follow: true,
  1458.       },
  1459.       isGoogleImages && {
  1460.         e: '[data-tbnid] a:not([href])',
  1461.         s: (m, a) => {
  1462.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1463.           new MutationObserver((_, mo) => {
  1464.             mo.disconnect();
  1465.             App.isEnabled = true;
  1466.             a.alt = a2.innerText;
  1467.             const {left, top} = a.getBoundingClientRect();
  1468.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1469.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1470.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1471.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1472.         },
  1473.       },
  1474.       dotDomain.endsWith('.instagram.com') && {
  1475.         e: [
  1476.           'a[href*="/p/"]',
  1477.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1478.         ],
  1479.         s: (m, node, rule) => {
  1480.           let data, a, n, img, src;
  1481.           if (location.pathname.startsWith('/p/')) {
  1482.             img = $('img[srcset], video', node.parentNode);
  1483.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1484.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1485.           }
  1486.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1487.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1488.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1489.           }
  1490.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1491.           Ruler.toggle(rule, 'g', a && /<\w+[^>]+carousel/i.test(a.innerHTML));
  1492.           rule.follow = !data && !rule.g;
  1493.           rule._data = data;
  1494.           rule._img = img;
  1495.           return (
  1496.             !a && !src ? false :
  1497.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1498.                 data.video_url || data.display_url);
  1499.         },
  1500.         c: (html, doc, node, rule) =>
  1501.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1502.         follow: true,
  1503.         _q: 'meta[property="og:video"]',
  1504.         _g(text, doc, url, m, rule) {
  1505.           const media = JSON.parse(text).graphql.shortcode_media;
  1506.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1507.             url: e.node.video_url || e.node.display_url,
  1508.           }));
  1509.           items.title = tryCatch(rule._getCaption, media) || '';
  1510.           return items;
  1511.         },
  1512.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1513.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1514.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1515.       },
  1516.       ...dotDomain.endsWith('.reddit.com') && [{
  1517.         u: '||i.reddituploads.com/',
  1518.       }, {
  1519.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1520.         s: (m, node) => $propUp(node, 'data-url'),
  1521.       }, {
  1522.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1523.         s: 'https://i$1',
  1524.       }] || [],
  1525.       dotDomain.endsWith('.tumblr.com') && {
  1526.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1527.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1528.         follow: true,
  1529.       },
  1530.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1531.         e: 'a.media-item, a.js-media-image-link',
  1532.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1533.         follow: true,
  1534.       },
  1535.       dotDomain.endsWith('.twitter.com') && {
  1536.         e: '.grid-tweet > .media-overlay',
  1537.         s: (m, node) => node.previousElementSibling.src,
  1538.         follow: true,
  1539.       },
  1540.     ];
  1541.  
  1542.     const main = [
  1543.       {
  1544.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1545.         s: '$1',
  1546.         follow: true,
  1547.         onerror: 'skip',
  1548.       },
  1549.       {
  1550.         u: [
  1551.           '||500px.com/photo/',
  1552.           '||cl.ly/',
  1553.           '||cweb-pix.com/',
  1554.           '//ibb.co/',
  1555.           '||imgcredit.xyz/image/',
  1556.         ],
  1557.         r: /\.\w+\/.+/,
  1558.         q: 'meta[property="og:image"]',
  1559.       },
  1560.       {
  1561.         u: 'attachment.php',
  1562.         r: /attachment\.php.+attachmentid/,
  1563.       },
  1564.       {
  1565.         u: '||abload.de/image',
  1566.         q: '#image',
  1567.       },
  1568.       {
  1569.         u: '||deviantart.com/art/',
  1570.         s: (m, node) =>
  1571.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1572.             '' :
  1573.             m.input,
  1574.         q: [
  1575.           '#download-button[href*=".jpg"]',
  1576.           '#download-button[href*=".jpeg"]',
  1577.           '#download-button[href*=".gif"]',
  1578.           '#download-button[href*=".png"]',
  1579.           '#gmi-ResViewSizer_fullimg',
  1580.           'img.dev-content-full',
  1581.         ],
  1582.       },
  1583.       {
  1584.         u: '||dropbox.com/s',
  1585.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1586.         q: (text, doc) =>
  1587.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1588.       },
  1589.       {
  1590.         r: /[./]ebay\.[^/]+\/itm\//,
  1591.         q: text =>
  1592.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1593.             .replace(/~~60_\d+/, '~~60_57'),
  1594.       },
  1595.       {
  1596.         u: '||i.ebayimg.com/',
  1597.         s: (m, node) =>
  1598.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1599.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1600.       },
  1601.       {
  1602.         u: '||fastpic.ru',
  1603.         e: 'a',
  1604.         q: 'img[src*="/big/"]',
  1605.         xhr: true,
  1606.       },
  1607.       {
  1608.         u: '||facebook.com/',
  1609.         r: /photo\.php|[^/]+\/photos\//,
  1610.         s: (m, node) =>
  1611.           node.id === 'fbPhotoImage' ? false :
  1612.             /gradient\.png$/.test(m.input) ? '' :
  1613.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1614.         q: [
  1615.           'div + span > a:first-child:not([href*="tag_faces"])',
  1616.           'div + span > a[href*="tag_faces"] ~ a',
  1617.         ],
  1618.         rect: '#fbProfileCover',
  1619.       },
  1620.       {
  1621.         u: '||fbcdn.',
  1622.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1623.         s: m =>
  1624.           dotDomain.endsWith('.facebook.com') &&
  1625.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1626.           false,
  1627.         manual: true,
  1628.       },
  1629.       {
  1630.         u: ['||fbcdn-', 'fbcdn.net/'],
  1631.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1632.         s: (m, node) => {
  1633.           if (node.id === 'fbPhotoImage') {
  1634.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1635.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1636.           }
  1637.           if (m[4])
  1638.             return false;
  1639.           const pn = node.parentNode;
  1640.           if (pn.outerHTML.includes('/hovercard/'))
  1641.             return '';
  1642.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1643.             return false;
  1644.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1645.         },
  1646.         rect: '.photoWrap',
  1647.       },
  1648.       {
  1649.         u: '||flickr.com/photos/',
  1650.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1651.         s: m =>
  1652.           m.input.indexOf('/sizes/') < 0 ?
  1653.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1654.             false,
  1655.         q: (text, doc) => {
  1656.           const links = $$('.sizes-list a', doc);
  1657.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1658.         },
  1659.         follow: true,
  1660.       },
  1661.       {
  1662.         u: '||flickr.com/photos/',
  1663.         r: /\/sizes\//,
  1664.         q: '#allsizes-photo > img',
  1665.       },
  1666.       {
  1667.         u: '||gfycat.com/',
  1668.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1669.         s: 'https://$1$3',
  1670.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1671.       },
  1672.       {
  1673.         u: [
  1674.           '||googleusercontent.com/proxy',
  1675.           '||googleusercontent.com/gadgets/proxy',
  1676.         ],
  1677.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1678.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1679.       },
  1680.       {
  1681.         u: [
  1682.           '||googleusercontent.com/',
  1683.           '||ggpht.com/',
  1684.         ],
  1685.         s: m => m.input.includes('webcache.') ? '' :
  1686.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1687.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1688.       },
  1689.       {
  1690.         u: '||gravatar.com/',
  1691.         r: /([a-z0-9]{32})/,
  1692.         s: 'https://gravatar.com/avatar/$1?s=200',
  1693.       },
  1694.       {
  1695.         u: '//gyazo.com/',
  1696.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1697.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1698.         _q: 'meta[name="twitter:image"]',
  1699.       },
  1700.       {
  1701.         u: '||hostingkartinok.com/show-image.php',
  1702.         q: '.image img',
  1703.       },
  1704.       {
  1705.         u: [
  1706.           '||imagecurl.com/images/',
  1707.           '||imagecurl.com/viewer.php',
  1708.         ],
  1709.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1710.         s: 'https://imagecurl.com/images/$1$2$3',
  1711.       },
  1712.       {
  1713.         u: '||imagebam.com/image/',
  1714.         q: 'meta[property="og:image"]',
  1715.         tabfix: true,
  1716.         xhr: hostname.includes('planetsuzy'),
  1717.       },
  1718.       {
  1719.         u: '||imageban.ru/thumbs',
  1720.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1721.         s: '$1out$2/$3/$4',
  1722.       },
  1723.       {
  1724.         u: [
  1725.           '||imageban.ru/show',
  1726.           '||imageban.net/show',
  1727.           '||ibn.im/',
  1728.         ],
  1729.         q: '#img_main',
  1730.       },
  1731.       {
  1732.         u: '||imageshack.us/img',
  1733.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1734.         s: 'https://$2/download/$1/$3$4',
  1735.       },
  1736.       {
  1737.         u: '||imageshack.us/i/',
  1738.         q: '#share-dl',
  1739.       },
  1740.       {
  1741.         u: '||imageteam.org/img',
  1742.         q: 'img[alt="image"]',
  1743.       },
  1744.       {
  1745.         u: [
  1746.           '||imagetwist.com/',
  1747.           '||imageshimage.com/',
  1748.         ],
  1749.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1750.         q: 'img.pic',
  1751.         xhr: true,
  1752.       },
  1753.       {
  1754.         u: '||imageupper.com/i/',
  1755.         q: '#img',
  1756.         xhr: true,
  1757.       },
  1758.       {
  1759.         u: '||imagevenue.com/',
  1760.         q: 'a[data-toggle="full"] img',
  1761.       },
  1762.       {
  1763.         u: '||imagezilla.net/show/',
  1764.         q: '#photo',
  1765.         xhr: true,
  1766.       },
  1767.       {
  1768.         u: [
  1769.           '||images-na.ssl-images-amazon.com/images/',
  1770.           '||media-imdb.com/images/',
  1771.         ],
  1772.         r: /images\/.+?\.jpg/,
  1773.         s: '/V1\\.?_.+?\\.//g',
  1774.       },
  1775.       {
  1776.         u: '||imgbox.com/',
  1777.         r: /\.com\/([a-z0-9]+)$/i,
  1778.         q: '#img',
  1779.         xhr: hostname !== 'imgbox.com',
  1780.       },
  1781.       {
  1782.         u: '||imgclick.net/',
  1783.         r: /\.net\/(\w+)/,
  1784.         q: 'img.pic',
  1785.         xhr: true,
  1786.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1787.       },
  1788.       {
  1789.         u: '.imgcredit.xyz/',
  1790.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1791.         s: ['https$1$2', 'https$1.png'],
  1792.       },
  1793.       {
  1794.         u: [
  1795.           '||imgflip.com/i/',
  1796.           '||imgflip.com/gif/',
  1797.         ],
  1798.         r: /\/(i|gif)\/([^/?#]+)/,
  1799.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1800.       },
  1801.       {
  1802.         u: [
  1803.           '||imgur.com/a/',
  1804.           '||imgur.com/gallery/',
  1805.         ],
  1806.         g: async (text, doc, url, m, rule, node, cb) => {
  1807.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1808.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1809.           const images = ((info || 0).data || 0).images;
  1810.           const items = [];
  1811.           for (const img of images || []) {
  1812.             u = `https://i.imgur.com/${img.hash}`;
  1813.             items.push({
  1814.               url: img.ext === '.gif' && img.animated !== false ?
  1815.                 [`${u}.webm`, `${u}.mp4`, u] :
  1816.                 u + img.ext,
  1817.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1818.             });
  1819.           }
  1820.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1821.             items.title = info.title;
  1822.           cb(items);
  1823.         },
  1824.         css: '.post > .hover { display:none!important; }',
  1825.       },
  1826.       {
  1827.         u: '||imgur.com/',
  1828.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1829.         s: 'gallery',
  1830.         g: (text, doc, url, m) =>
  1831.           m[2].split(',').map(id => ({
  1832.             url: `https://i.${m[1]}${id}.jpg`,
  1833.           })),
  1834.       },
  1835.       {
  1836.         u: '||imgur.com/',
  1837.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1838.         s: (m, node) => {
  1839.           if (/memegen|random|register|search|signin/.test(m.input))
  1840.             return '';
  1841.           const a = node.closest('a');
  1842.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1843.             return false;
  1844.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1845.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1846.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1847.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1848.           return ext === 'webm' ?
  1849.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1850.             u + ext;
  1851.         },
  1852.       },
  1853.       {
  1854.         u: [
  1855.           '||instagr.am/p/',
  1856.           '||instagram.com/p/',
  1857.         ],
  1858.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1859.         q: text => {
  1860.           const m = JSON.parse(text).graphql.shortcode_media;
  1861.           return m.video_url || m.display_url;
  1862.         },
  1863.         rect: 'div.PhotoGridMediaItem',
  1864.         c: text => {
  1865.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1866.           return m === undefined ? '(no caption)' : m.node.text;
  1867.         },
  1868.       },
  1869.       {
  1870.         u: [
  1871.           '||livememe.com/',
  1872.           '||lvme.me/',
  1873.         ],
  1874.         r: /\.\w+\/([^.]+)$/,
  1875.         s: 'http://i.lvme.me/$1.jpg',
  1876.       },
  1877.       {
  1878.         u: '||lostpic.net/image',
  1879.         q: '.image-viewer-image img',
  1880.       },
  1881.       {
  1882.         u: '||makeameme.org/meme/',
  1883.         r: /\/meme\/([^/?#]+)/,
  1884.         s: 'https://media.makeameme.org/created/$1.jpg',
  1885.       },
  1886.       {
  1887.         u: '||photobucket.com/',
  1888.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1889.         s: 'https://i$1$3',
  1890.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1891.       },
  1892.       {
  1893.         u: '||piccy.info/view3/',
  1894.         r: /(.+?\/view3)\/(.*)\//,
  1895.         s: '$1/$2/orig/',
  1896.         q: '#mainim',
  1897.       },
  1898.       {
  1899.         u: '||pimpandhost.com/image/',
  1900.         r: /(.+?\/image\/[0-9]+)/,
  1901.         s: '$1?size=original',
  1902.         q: 'img.original',
  1903.       },
  1904.       {
  1905.         u: [
  1906.           '||pixroute.com/',
  1907.           '||imgspice.com/',
  1908.         ],
  1909.         r: /\.html$/,
  1910.         q: 'img[id]',
  1911.         xhr: true,
  1912.       },
  1913.       {
  1914.         u: '||postima',
  1915.         r: /postima?ge?\.org\/image\/\w+/,
  1916.         q: [
  1917.           'a[href*="dl="]',
  1918.           '#main-image',
  1919.         ],
  1920.       },
  1921.       {
  1922.         u: [
  1923.           '||prntscr.com/',
  1924.           '||prnt.sc/',
  1925.         ],
  1926.         r: /\.\w+\/.+/,
  1927.         q: 'meta[property="og:image"]',
  1928.         xhr: true,
  1929.       },
  1930.       {
  1931.         u: '||radikal.ru/',
  1932.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1933.         s: (m, node, rule) =>
  1934.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1935.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1936.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1937.       },
  1938.       {
  1939.         u: '||tumblr.com',
  1940.         r: /_500\.jpg/,
  1941.         s: ['/_500/_1280/', ''],
  1942.       },
  1943.       {
  1944.         u: '||twimg.com/',
  1945.         r: /\/profile_images/i,
  1946.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1947.       },
  1948.       {
  1949.         u: '||twimg.com/media/',
  1950.         r: /.+?format=(jpe?g|png|gif)/i,
  1951.         s: '$0&name=orig',
  1952.       },
  1953.       {
  1954.         u: '||twimg.com/1/proxy',
  1955.         r: /t=([^&_]+)/i,
  1956.         s: m => atob(m[1]).match(/http.+/),
  1957.       },
  1958.       {
  1959.         u: '||pic.twitter.com/',
  1960.         r: /\.com\/[a-z0-9]+/i,
  1961.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1962.         follow: true,
  1963.       },
  1964.       {
  1965.         u: '||twitpic.com/',
  1966.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1967.         s: 'https://twitpic.com/show/large/$2',
  1968.       },
  1969.       {
  1970.         u: '||wiki',
  1971.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1972.         s: '/\\/thumb(?=\\/)|' +
  1973.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1974.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1975.         xhr: !hostname.includes('wiki'),
  1976.       },
  1977.       {
  1978.         u: '||ytimg.com/vi/',
  1979.         r: /(.+?\/vi\/[^/]+)/,
  1980.         s: '$1/0.jpg',
  1981.         rect: '.video-list-item',
  1982.       },
  1983.       {
  1984.         u: '/viewer.php?file=',
  1985.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1986.         s: '$1/images/$2',
  1987.         xhr: true,
  1988.       },
  1989.       {
  1990.         u: '/thumb_',
  1991.         r: /\/albums.+\/thumb_[^/]/,
  1992.         s: '/thumb_//',
  1993.       },
  1994.       {
  1995.         u: [
  1996.           '.th.jp',
  1997.           '.th.gif',
  1998.           '.th.png',
  1999.         ],
  2000.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2001.         s: '$1$2',
  2002.         follow: true,
  2003.       },
  2004.       {
  2005.         r: RX_MEDIA_URL,
  2006.       },
  2007.     ];
  2008.  
  2009.     /** @type mpiv.HostRule[] */
  2010.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  2011.   },
  2012.  
  2013.   format(rule, {expand} = {}) {
  2014.     const s = Util.stringify(rule, null, ' ');
  2015.     return expand ?
  2016.       /* {"a": ...,
  2017.           "b": ...,
  2018.           "c": ...
  2019.          } */
  2020.       s.replace(/^{\s+/g, '{') :
  2021.       /* {"a": ..., "b": ..., "c": ...} */
  2022.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2023.   },
  2024.  
  2025.   fromElement(el) {
  2026.     const text = el.textContent.trim();
  2027.     if (text.startsWith('{') &&
  2028.         text.endsWith('}') &&
  2029.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2030.       const rule = tryCatch(JSON.parse, text);
  2031.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2032.     }
  2033.   },
  2034.  
  2035.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2036.  
  2037.   /** @returns mpiv.HostRule | Error | false | undefined */
  2038.   parse(rule) {
  2039.     const isBatchOp = this instanceof Map;
  2040.     try {
  2041.       if (typeof rule === 'string')
  2042.         rule = JSON.parse(rule);
  2043.       if ('d' in rule && typeof rule.d !== 'string')
  2044.         rule.d = undefined;
  2045.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2046.         return false;
  2047.       if ('e' in rule) {
  2048.         let {e} = rule;
  2049.         if (typeof e === 'string') {
  2050.           e = e.trim();
  2051.         } else if (e) {
  2052.           e = Object.entries(e).filter(Ruler.isValidE2);
  2053.           if (!e.length) {
  2054.             throw new Error('Invalid syntax for "e". Example: ' +
  2055.               '"e": {".parent": ".image"} or ' +
  2056.               '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2057.           }
  2058.           rule.e2 = e;
  2059.           e = '';
  2060.         }
  2061.         if (isBatchOp) rule.e = e || undefined;
  2062.       }
  2063.       const compileTo = isBatchOp ? rule : {};
  2064.       if (rule.r)
  2065.         compileTo.r = new RegExp(rule.r, 'i');
  2066.       if (RX_HAS_CODE.test(rule.s))
  2067.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  2068.       if (RX_HAS_CODE.test(rule.q))
  2069.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  2070.       if (RX_HAS_CODE.test(rule.c))
  2071.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  2072.       return rule;
  2073.     } catch (err) {
  2074.       if (!err.message.includes('unsafe-eval'))
  2075.         if (isBatchOp) {
  2076.           this.set(rule, err);
  2077.         } else {
  2078.           return err;
  2079.         }
  2080.     }
  2081.   },
  2082.  
  2083.   runC(text, doc = document) {
  2084.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2085.     ai.caption = fn(text, doc);
  2086.   },
  2087.  
  2088.   runCHandler: {
  2089.     function: (text, doc) =>
  2090.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2091.     string: (text, doc) => {
  2092.       const el = $many(ai.rule.c, doc);
  2093.       return !el ? '' :
  2094.         el.getAttribute('content') ||
  2095.         el.getAttribute('title') ||
  2096.         el.textContent;
  2097.     },
  2098.     default: () =>
  2099.       (ai.tooltip || 0).text ||
  2100.       ai.node.alt ||
  2101.       $propUp(ai.node, 'title') ||
  2102.       Remoting.getFileName(
  2103.         ai.node.tagName === (ai.popup || 0).tagName
  2104.           ? ai.url
  2105.           : ai.node.src || $propUp(ai.node, 'href')),
  2106.   },
  2107.  
  2108.   runQ(text, doc, docUrl) {
  2109.     let url;
  2110.     if (typeof ai.rule.q === 'function') {
  2111.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2112.       if (Array.isArray(url)) {
  2113.         ai.urls = url.slice(1);
  2114.         url = url[0];
  2115.       }
  2116.     } else {
  2117.       const el = $many(ai.rule.q, doc);
  2118.       url = Remoting.findImageUrl(el, docUrl);
  2119.     }
  2120.     return url;
  2121.   },
  2122.  
  2123.   /** @returns {boolean} */
  2124.   runE2(rule, node) {
  2125.     let p, img;
  2126.     for (const [selParent, selImg] of rule.e2) {
  2127.       if ((p = node.closest(selParent)) && (img = $(selImg, p)))
  2128.         return RuleMatcher.adaptiveFind(img);
  2129.     }
  2130.   },
  2131.  
  2132.   /** @returns {?Array} if falsy then the rule should be skipped */
  2133.   runS(node, rule, m) {
  2134.     let urls = [];
  2135.     for (const s of ensureArray(rule.s))
  2136.       urls.push(
  2137.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2138.           typeof s === 'function' ? s(m, node, rule) :
  2139.             s);
  2140.     if (rule.q && urls.length > 1) {
  2141.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2142.       return;
  2143.     }
  2144.     if (Array.isArray(urls[0]))
  2145.       urls = urls[0];
  2146.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2147.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2148.   },
  2149.  
  2150.   /** @returns {boolean} */
  2151.   runU(rule, url) {
  2152.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2153.     return u.fn.call(u.data, url);
  2154.   },
  2155.  
  2156.   substituteSingle(s, m) {
  2157.     if (!m || m.input == null) return s;
  2158.     if (s.startsWith('/') && !s.startsWith('//')) {
  2159.       const mid = s.search(/[^\\]\//) + 1;
  2160.       const end = s.lastIndexOf('/');
  2161.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2162.       return m.input.replace(re, s.slice(mid + 1, end));
  2163.     }
  2164.     if (m.length && s.includes('$')) {
  2165.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2166.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2167.         for (let i = maxLength; i >= 0; i--) {
  2168.           const part = num.slice(0, i) | 0;
  2169.           if (part < m.length)
  2170.             return (m[part] || '') + num.slice(i);
  2171.         }
  2172.         return text;
  2173.       });
  2174.     }
  2175.     return s;
  2176.   },
  2177.  
  2178.   toggle(rule, prop, condition) {
  2179.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2180.     return condition;
  2181.   },
  2182. };
  2183.  
  2184. const RuleMatcher = {
  2185.  
  2186.   /** @returns {Object} */
  2187.   adaptiveFind(node) {
  2188.     const tn = node.tagName;
  2189.     const src = node.currentSrc || node.src;
  2190.     const isPic = tn === 'IMG' || tn === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  2191.     let a, info, url;
  2192.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2193.     if (tn !== 'A') {
  2194.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2195.       info = RuleMatcher.find(url, node);
  2196.     }
  2197.     if (!info && (a = node.closest('A'))) {
  2198.       const ds = a.dataset;
  2199.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2200.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2201.       url = !url.startsWith('data:') && url;
  2202.       info = RuleMatcher.find(url, a);
  2203.     }
  2204.     if (!info && isPic)
  2205.       info = {node, rule: {}, url: src};
  2206.     return info;
  2207.   },
  2208.  
  2209.   /** @returns ?mpiv.RuleMatchInfo */
  2210.   find(url, node, {noHtml, skipRules} = {}) {
  2211.     const tn = node.tagName;
  2212.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2213.     const isPicOrLink = isPic || tn === 'A';
  2214.     let m, html, info;
  2215.     for (const rule of Ruler.rules) {
  2216.       if (rule.u && (!url || !Ruler.runU(rule, url)) ||
  2217.           rule.e && !node.matches(rule.e) ||
  2218.           skipRules && skipRules.includes(rule))
  2219.         continue;
  2220.       if (rule.e2 && (info = Ruler.runE2(rule, node)))
  2221.         return info;
  2222.       if (rule.r)
  2223.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2224.           ? rule.r.exec(html || (html = node.outerHTML))
  2225.           : url && rule.r.exec(url);
  2226.       else if (url)
  2227.         m = Object.assign([url], {index: 0, input: url});
  2228.       else
  2229.         m = [];
  2230.       if (!m)
  2231.         continue;
  2232.       if (rule.s === '')
  2233.         return {};
  2234.       let hasS = rule.s != null;
  2235.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2236.       // but we'll only allow it to match rules without 's' in the nested find call
  2237.       if (isPic && !hasS && !skipRules)
  2238.         continue;
  2239.       hasS &= rule.s !== 'gallery';
  2240.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2241.       if (urls)
  2242.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2243.     }
  2244.   },
  2245.  
  2246.   /** @returns ?mpiv.RuleMatchInfo */
  2247.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2248.     let info;
  2249.     let url = `${urls[0]}`;
  2250.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2251.     if (url)
  2252.       url = Util.rel2abs(url);
  2253.     else
  2254.       info = {};
  2255.     if (follow)
  2256.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2257.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2258.       const xhr = cfg.xhr && rule.xhr;
  2259.       info = {
  2260.         match,
  2261.         node,
  2262.         rule,
  2263.         url,
  2264.         urls: urls.length > 1 ? urls.slice(1) : null,
  2265.         gallery: rule.g && Gallery.makeParser(rule.g),
  2266.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2267.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2268.       };
  2269.     }
  2270.     return info;
  2271.   },
  2272.  
  2273.   isFollowableUrl(url, rule) {
  2274.     const f = rule.follow;
  2275.     return typeof f === 'function' ? f(url) : f;
  2276.   },
  2277. };
  2278.  
  2279. const Remoting = {
  2280.  
  2281.   gmXhr(url, opts = {}) {
  2282.     if (ai.req)
  2283.       tryCatch.call(ai.req, ai.req.abort);
  2284.     return new Promise((resolve, reject) => {
  2285.       const {anonymous} = ai.rule || {};
  2286.       ai.req = GM.xmlHttpRequest({
  2287.         url,
  2288.         anonymous,
  2289.         withCredentials: !anonymous,
  2290.         method: 'GET',
  2291.         timeout: 30e3,
  2292.         ...opts,
  2293.         onload: done,
  2294.         onerror: done,
  2295.         ontimeout() {
  2296.           ai.req = null;
  2297.           reject(`Timeout fetching ${url}`);
  2298.         },
  2299.       });
  2300.       function done(r) {
  2301.         ai.req = null;
  2302.         if (r.status < 400 && !r.error)
  2303.           resolve(r);
  2304.         else
  2305.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2306.       }
  2307.     });
  2308.   },
  2309.  
  2310.   async getDoc(url) {
  2311.     if (!url) {
  2312.       // current document
  2313.       return {
  2314.         doc,
  2315.         finalUrl: location.href,
  2316.         responseText: doc.documentElement.outerHTML,
  2317.       };
  2318.     }
  2319.     const r = await (!ai.post ?
  2320.       Remoting.gmXhr(url) :
  2321.       Remoting.gmXhr(url, {
  2322.         method: 'POST',
  2323.         data: ai.post,
  2324.         headers: {
  2325.           'Content-Type': 'application/x-www-form-urlencoded',
  2326.           'Referer': url,
  2327.         },
  2328.       }));
  2329.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2330.     return r;
  2331.   },
  2332.  
  2333.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2334.     ai.bufBar = false;
  2335.     ai.bufStart = now();
  2336.     const response = await Remoting.gmXhr(url, {
  2337.       responseType: 'blob',
  2338.       headers: {
  2339.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2340.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2341.       },
  2342.       onprogress: Remoting.getImageProgress,
  2343.     });
  2344.     Bar.set(false);
  2345.     const type = Remoting.guessMimeType(response);
  2346.     let b = response.response;
  2347.     if (!b) throw 'Empty response';
  2348.     if (b.type !== type)
  2349.       b = b.slice(0, b.size, type);
  2350.     const res = xhr === 'blob'
  2351.       ? (ai.blobUrl = URL.createObjectURL(b))
  2352.       : await Remoting.blobToDataUrl(b);
  2353.     return [res, type.startsWith('video')];
  2354.   },
  2355.  
  2356.   getImageProgress(e) {
  2357.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2358.       ai.bufBar = true;
  2359.     if (ai.bufBar) {
  2360.       const pct = e.loaded / e.total * 100 | 0;
  2361.       const size = e.total / 1024 | 0;
  2362.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2363.     }
  2364.   },
  2365.  
  2366.   async findRedirect() {
  2367.     try {
  2368.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2369.         method: 'HEAD',
  2370.         headers: {
  2371.           'Referer': location.href.split('#', 1)[0],
  2372.         },
  2373.       });
  2374.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2375.       if (!info || !info.url)
  2376.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2377.       Object.assign(ai, info);
  2378.       App.startSingle();
  2379.     } catch (e) {
  2380.       App.handleError(e);
  2381.     }
  2382.   },
  2383.  
  2384.   async saveFile() {
  2385.     const url = ai.popup.src || ai.popup.currentSrc;
  2386.     let name = Remoting.getFileName(ai.imageUrl || url);
  2387.     if (!name.includes('.'))
  2388.       name += '.jpg';
  2389.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2390.       $create('a', {href: url, download: name})
  2391.         .dispatchEvent(new MouseEvent('click'));
  2392.     } else {
  2393.       Status.set('+loading');
  2394.       const onload = () => Status.set('-loading');
  2395.       const gmDL = typeof GM_download === 'function';
  2396.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2397.         url,
  2398.         name,
  2399.         headers: {Referer: url},
  2400.         method: 'get', // polyfilling GM_download
  2401.         responseType: 'blob', // polyfilling GM_download
  2402.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2403.         onerror: e => {
  2404.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2405.           onload();
  2406.         },
  2407.         onprogress: Remoting.getImageProgress,
  2408.         onload({response}) {
  2409.           onload();
  2410.           if (!gmDL) { // polyfilling GM_download
  2411.             const a = Object.assign(document.createElement('a'), {
  2412.               href: URL.createObjectURL(response),
  2413.               download: name,
  2414.             });
  2415.             a.dispatchEvent(new MouseEvent('click'));
  2416.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2417.           }
  2418.         },
  2419.       });
  2420.     }
  2421.   },
  2422.  
  2423.   getFileName(url) {
  2424.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2425.   },
  2426.  
  2427.   blobToDataUrl(blob) {
  2428.     return new Promise((resolve, reject) => {
  2429.       const fr = new FileReader();
  2430.       fr.onload = () => resolve(fr.result);
  2431.       fr.onerror = reject;
  2432.       fr.readAsDataURL(blob);
  2433.     });
  2434.   },
  2435.  
  2436.   guessMimeType({responseHeaders, finalUrl}) {
  2437.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2438.         !RegExp.$1.includes('text/plain'))
  2439.       return RegExp.$1;
  2440.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2441.     switch (ext.toLowerCase()) {
  2442.       case 'bmp': return 'image/bmp';
  2443.       case 'gif': return 'image/gif';
  2444.       case 'jpe': return 'image/jpeg';
  2445.       case 'jpeg': return 'image/jpeg';
  2446.       case 'jpg': return 'image/jpeg';
  2447.       case 'mp4': return 'video/mp4';
  2448.       case 'png': return 'image/png';
  2449.       case 'svg': return 'image/svg+xml';
  2450.       case 'tif': return 'image/tiff';
  2451.       case 'tiff': return 'image/tiff';
  2452.       case 'webm': return 'video/webm';
  2453.       default: return 'application/octet-stream';
  2454.     }
  2455.   },
  2456.  
  2457.   findImageUrl(n, url) {
  2458.     if (!n) return;
  2459.     let html;
  2460.     const path =
  2461.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2462.       n.getAttribute('src') ||
  2463.       n.getAttribute('data-m4v') ||
  2464.       n.getAttribute('href') ||
  2465.       n.getAttribute('content') ||
  2466.       (html = n.outerHTML).includes('http') &&
  2467.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2468.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2469.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2470.   },
  2471. };
  2472.  
  2473. const Status = {
  2474.  
  2475.   set(status) {
  2476.     if (!status && !cfg.globalStatus) {
  2477.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2478.       return;
  2479.     }
  2480.     const prefix = cfg.globalStatus ? PREFIX : '';
  2481.     const action = status && /^[+-]/.test(status) && status[0];
  2482.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2483.     const el = cfg.globalStatus ? doc.documentElement :
  2484.       name === 'edge' ? ai.popup :
  2485.         ai.node;
  2486.     if (!el) return;
  2487.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2488.     const oldValue = (el.getAttribute(attr) || '').trim();
  2489.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2490.     switch (action) {
  2491.       case '-':
  2492.         cls.delete(name);
  2493.         break;
  2494.       case false:
  2495.         for (const c of cls)
  2496.           if (c.startsWith(prefix) && c !== name)
  2497.             cls.delete(c);
  2498.       // fallthrough to +
  2499.       case '+':
  2500.         if (name)
  2501.           cls.add(name);
  2502.         break;
  2503.     }
  2504.     const newValue = [...cls].join(' ');
  2505.     if (newValue !== oldValue)
  2506.       el.setAttribute(attr, newValue);
  2507.   },
  2508.  
  2509.   loading(force) {
  2510.     if (!force) {
  2511.       clearTimeout(ai.timerStatus);
  2512.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2513.     } else if (!ai.popupLoaded) {
  2514.       Status.set('+loading');
  2515.     }
  2516.   },
  2517. };
  2518.  
  2519. const UrlMatcher = (() => {
  2520.   // string-to-regexp escaped chars
  2521.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2522.   // rx for '^' symbol in simple url match
  2523.   const RX_SEP = /[^\w%._-]/y;
  2524.   const RXS_SEP = RX_SEP.source;
  2525.   return match => {
  2526.     const results = [];
  2527.     for (const s of ensureArray(match)) {
  2528.       const pinDomain = s.startsWith('||');
  2529.       const pinStart = !pinDomain && s.startsWith('|');
  2530.       const endSep = s.endsWith('^');
  2531.       let fn;
  2532.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2533.       if (needle.includes('^')) {
  2534.         let plain = '';
  2535.         for (const part of needle.split('^'))
  2536.           if (part.length > plain.length)
  2537.             plain = part;
  2538.         const rx = new RegExp(
  2539.           (pinStart ? '^' : '') +
  2540.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2541.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2542.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2543.         needle = [plain, rx];
  2544.         fn = regexp;
  2545.       } else if (pinStart) {
  2546.         fn = endSep ? equals : starts;
  2547.       } else if (pinDomain) {
  2548.         const slashPos = needle.indexOf('/');
  2549.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2550.         needle = [needle, domain, slashPos > 0, endSep];
  2551.         fn = startsDomainPrescreen;
  2552.       } else if (endSep) {
  2553.         fn = ends;
  2554.       } else {
  2555.         fn = has;
  2556.       }
  2557.       results.push({fn, data: needle});
  2558.     }
  2559.     return results.length > 1 ?
  2560.       {fn: checkArray, data: results} :
  2561.       results[0];
  2562.   };
  2563.   function checkArray(s) {
  2564.     return this.some(checkArrayItem, s);
  2565.   }
  2566.   function checkArrayItem(item) {
  2567.     return item.fn.call(item.data, this);
  2568.   }
  2569.   function ends(s) {
  2570.     return s.endsWith(this) || (
  2571.       s.length > this.length &&
  2572.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2573.       endsWithSep(s));
  2574.   }
  2575.   function endsWithSep(s, pos = s.length - 1) {
  2576.     RX_SEP.lastIndex = pos;
  2577.     return RX_SEP.test(s);
  2578.   }
  2579.   function equals(s) {
  2580.     return s.startsWith(this) && (
  2581.       s.length === this.length ||
  2582.       s.length === this.length + 1 && endsWithSep(s));
  2583.   }
  2584.   function has(s) {
  2585.     return s.includes(this);
  2586.   }
  2587.   function regexp(s) {
  2588.     return s.includes(this[0]) && this[1].test(s);
  2589.   }
  2590.   function starts(s) {
  2591.     return s.startsWith(this);
  2592.   }
  2593.   function startsDomainPrescreen(url) {
  2594.     return url.includes(this[0]) && startsDomain.call(this, url);
  2595.   }
  2596.   function startsDomain(url) {
  2597.     let hostStart = url.indexOf('//');
  2598.     if (hostStart && url[hostStart - 1] !== ':')
  2599.       return;
  2600.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2601.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2602.     const [needle, domain, pinDomainEnd, endSep] = this;
  2603.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2604.     for (; ; start++) {
  2605.       start = host.indexOf(domain, start);
  2606.       if (start < 0)
  2607.         return;
  2608.       if (!start || host[start - 1] === '.')
  2609.         break;
  2610.     }
  2611.     start += hostStart;
  2612.     if (url.lastIndexOf(needle, start) !== start)
  2613.       return;
  2614.     const end = start + needle.length;
  2615.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2616.   }
  2617. })();
  2618.  
  2619. const Util = {
  2620.  
  2621.   addStyle(name, css) {
  2622.     const id = `${PREFIX}style:${name}`;
  2623.     const el = doc.getElementById(id) ||
  2624.                css && $create('style', {id});
  2625.     if (!el) return;
  2626.     if (el.textContent !== css)
  2627.       el.textContent = css;
  2628.     if (el.parentElement !== doc.head)
  2629.       doc.head.appendChild(el);
  2630.     return el;
  2631.   },
  2632.  
  2633.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2634.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2635.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2636.   },
  2637.  
  2638.   decodeHtmlEntities(s) {
  2639.     return s
  2640.       .replace(/&quot;/g, '"')
  2641.       .replace(/&apos;/g, '\'')
  2642.       .replace(/&lt;/g, '<')
  2643.       .replace(/&gt;/g, '>')
  2644.       .replace(/&amp;/g, '&');
  2645.   },
  2646.  
  2647.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2648.   decodeUrl(url) {
  2649.     if (!url || typeof url !== 'string') return url;
  2650.     const iPct = url.indexOf('%');
  2651.     const iColon = url.indexOf(':');
  2652.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2653.       decodeURIComponent(url) :
  2654.       url;
  2655.   },
  2656.  
  2657.   deepEqual(a, b) {
  2658.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2659.       return a === b;
  2660.     if (Array.isArray(a)) {
  2661.       return Array.isArray(b) &&
  2662.         a.length === b.length &&
  2663.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2664.     }
  2665.     const keys = Object.keys(a);
  2666.     return keys.length === Object.keys(b).length &&
  2667.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2668.   },
  2669.  
  2670.   forceLayout(node) {
  2671.     // eslint-disable-next-line no-unused-expressions
  2672.     node.clientHeight;
  2673.   },
  2674.  
  2675.   formatError(e, rule) {
  2676.     const message =
  2677.       e.message ||
  2678.       e.readyState && 'Request failed.' ||
  2679.       e.type === 'error' && `File can't be displayed.${
  2680.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2681.       }` ||
  2682.       e;
  2683.     const m = [
  2684.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2685.       ['', 'font-weight:normal'],
  2686.     ];
  2687.     m.push(...[
  2688.       ['Node: %o', ai.node],
  2689.       ['Rule: %o', rule],
  2690.       ai.url && ['URL: %s', ai.url],
  2691.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2692.     ].filter(Boolean));
  2693.     return {
  2694.       message,
  2695.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2696.       consoleArgs: m.map(([, v]) => v),
  2697.     };
  2698.   },
  2699.  
  2700.   isHovered(el) {
  2701.     // doesn't work in image tabs, browser bug?
  2702.     return App.isImageTab || el.closest(':hover');
  2703.   },
  2704.  
  2705.   isVideoUrl(url) {
  2706.     return url.startsWith('data:video') ||
  2707.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2708.   },
  2709.  
  2710.   newFunction(...args) {
  2711.     try {
  2712.       return App.NOP || new Function(...args);
  2713.     } catch (e) {
  2714.       if (!e.message.includes('unsafe-eval'))
  2715.         throw e;
  2716.       App.NOP = () => {};
  2717.       return App.NOP;
  2718.     }
  2719.   },
  2720.  
  2721.   rel2abs(rel, abs = location.href) {
  2722.     try {
  2723.       return rel.startsWith('data:') ? rel :
  2724.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2725.           /^[-\w]+:\/\//.test(rel) ? rel :
  2726.             new URL(rel, abs).href;
  2727.     } catch (e) {
  2728.       return rel;
  2729.     }
  2730.   },
  2731.  
  2732.   stringify(...args) {
  2733.     const p = Array.prototype;
  2734.     const {toJSON} = p;
  2735.     if (toJSON) p.toJSON = null;
  2736.     const res = JSON.stringify(...args);
  2737.     if (toJSON) p.toJSON = toJSON;
  2738.     return res;
  2739.   },
  2740.  
  2741.   suppressTooltip() {
  2742.     for (const node of [
  2743.       ai.node.parentNode,
  2744.       ai.node,
  2745.       ai.node.firstElementChild,
  2746.     ]) {
  2747.       const t = (node || 0).title;
  2748.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2749.         ai.tooltip = {node, text: t};
  2750.         node.title = '';
  2751.         break;
  2752.       }
  2753.     }
  2754.   },
  2755.  
  2756.   tabFixUrl() {
  2757.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2758.            navigator.userAgent.includes('Gecko/') &&
  2759.            flattenHtml(`data:text/html;charset=utf8,
  2760.       <style>
  2761.         body {
  2762.           margin: 0;
  2763.           padding: 0;
  2764.           background: #222;
  2765.         }
  2766.         .fit {
  2767.           overflow: hidden
  2768.         }
  2769.         .fit > img {
  2770.           max-width: 100vw;
  2771.           max-height: 100vh;
  2772.         }
  2773.         body > img {
  2774.           margin: auto;
  2775.           position: absolute;
  2776.           left: 0;
  2777.           right: 0;
  2778.           top: 0;
  2779.           bottom: 0;
  2780.         }
  2781.       </style>
  2782.       <body class=fit>
  2783.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2784.       </body>
  2785.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2786.   },
  2787. };
  2788.  
  2789. async function setup({rule} = {}) {
  2790.   if (typeof doc.body.attachShadow !== 'function') {
  2791.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2792.           'You can edit the script\'s storage directly in your userscript manager.');
  2793.     return;
  2794.   }
  2795.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2796.   let uiCfg;
  2797.   let root = (elConfig || 0).shadowRoot;
  2798.   let {blankRuleElement} = setup;
  2799.   /** @type NodeList */
  2800.   const UI = new Proxy({}, {
  2801.     get(_, id) {
  2802.       return root.getElementById(id);
  2803.     },
  2804.   });
  2805.   if (!rule || !elConfig)
  2806.     init(await Config.load({save: true}));
  2807.   if (rule)
  2808.     installRule(rule);
  2809.  
  2810.   function init(data) {
  2811.     uiCfg = data;
  2812.     $remove(elConfig);
  2813.     elConfig = $create('div', {contentEditable: true});
  2814.     root = elConfig.attachShadow({mode: 'open'});
  2815.     root.innerHTML = createConfigHtml();
  2816.     initEvents();
  2817.     renderAll();
  2818.     renderCustomScales();
  2819.     renderRules();
  2820.     doc.body.appendChild(elConfig);
  2821.     requestAnimationFrame(() => {
  2822.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2823.     });
  2824.   }
  2825.  
  2826.   function initEvents() {
  2827.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2828.     UI._export.onclick = e => {
  2829.       dropEvent(e);
  2830.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2831.       UI._exportNotification.hidden = false;
  2832.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2833.     };
  2834.     UI._import.onclick = e => {
  2835.       dropEvent(e);
  2836.       const s = prompt('Paste settings:');
  2837.       if (s)
  2838.         init(new Config({data: s}));
  2839.     };
  2840.     UI._install.onclick = setupRuleInstaller;
  2841.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2842.     UI._reveal.onclick = e => {
  2843.       e.preventDefault();
  2844.       cssApp.hidden = !cssApp.hidden;
  2845.       if (!cssApp.hidden) {
  2846.         if (!cssApp.value) {
  2847.           App.updateStyles();
  2848.           cssApp.value = App.globalStyle.trim();
  2849.           cssApp.setSelectionRange(0, 0);
  2850.         }
  2851.         cssApp.focus();
  2852.       }
  2853.     };
  2854.     UI.start.onchange = function () {
  2855.       UI.delay.closest('label').hidden =
  2856.         UI.preload.closest('label').hidden =
  2857.           this.value !== 'auto';
  2858.     };
  2859.     UI.start.onchange();
  2860.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2861.     // color
  2862.     for (const el of $$('[type="color"]', root)) {
  2863.       el.oninput = colorOnInput;
  2864.       el.elSwatch = el.nextElementSibling;
  2865.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2866.       el.elOpacity.elColor = el;
  2867.     }
  2868.     function colorOnInput() {
  2869.       this.elSwatch.style.setProperty('--color',
  2870.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2871.     }
  2872.     // range
  2873.     for (const el of $$('[type="range"]', root)) {
  2874.       el.oninput = rangeOnInput;
  2875.       el.onblur = rangeOnBlur;
  2876.       el.addEventListener('focusin', rangeOnFocus);
  2877.     }
  2878.     function rangeOnBlur(e) {
  2879.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2880.         this.elEdit.onblur(e);
  2881.     }
  2882.     function rangeOnFocus() {
  2883.       if (this.elEdit) return;
  2884.       const {min, max, step, value} = this;
  2885.       this.elEdit = $create('input', {
  2886.         value, min, max, step,
  2887.         className: 'range-edit',
  2888.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2889.         type: 'number',
  2890.         elRange: this,
  2891.         onblur: rangeEditOnBlur,
  2892.         oninput: rangeEditOnInput,
  2893.       });
  2894.       this.insertAdjacentElement('afterend', this.elEdit);
  2895.     }
  2896.     function rangeOnInput() {
  2897.       this.title = (this.dataset.title || '').replace('$', this.value);
  2898.       if (this.elColor) this.elColor.oninput();
  2899.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2900.     }
  2901.     // range-edit
  2902.     function rangeEditOnBlur(e) {
  2903.       if (e.relatedTarget !== this.elRange) {
  2904.         this.remove();
  2905.         this.elRange.elEdit = null;
  2906.       }
  2907.     }
  2908.     function rangeEditOnInput() {
  2909.       this.elRange.valueAsNumber = this.valueAsNumber;
  2910.       this.elRange.oninput();
  2911.     }
  2912.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2913.     // which may happen since it sees only the outer <div> in the event |target|
  2914.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2915.   }
  2916.  
  2917.   function closeSetup(event) {
  2918.     const isApply = this.id === '_apply';
  2919.     if (event && (this.id === '_ok' || isApply)) {
  2920.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2921.       Ruler.init();
  2922.       Menu.reRegisterAlt();
  2923.       if (isApply) {
  2924.         renderCustomScales();
  2925.         UI._css.textContent = cfg._getCss();
  2926.         return;
  2927.       }
  2928.     }
  2929.     $remove(elConfig);
  2930.     elConfig = null;
  2931.   }
  2932.  
  2933.   function collectConfig({save, clone} = {}) {
  2934.     let data = {};
  2935.     for (const el of $$('input[id], select[id]', root))
  2936.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2937.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2938.           el.value || '';
  2939.     Object.assign(data, {
  2940.       css: UI.css.value.trim(),
  2941.       delay: UI.delay.valueAsNumber * 1000,
  2942.       hosts: collectRules(),
  2943.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2944.       scales: UI.scales.value
  2945.         .trim()
  2946.         .split(/[,;]*\s+/)
  2947.         .map(x => x.replace(',', '.'))
  2948.         .filter(x => !isNaN(parseFloat(x))),
  2949.     });
  2950.     if (clone)
  2951.       data = JSON.parse(Util.stringify(data));
  2952.     return new Config({data, save});
  2953.   }
  2954.  
  2955.   function collectRules() {
  2956.     return [...UI._rules.children]
  2957.       .map(el => [el.value.trim(), el[RULE]])
  2958.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2959.       .map(([s, json]) => json || s)
  2960.       .filter(Boolean);
  2961.   }
  2962.  
  2963.   function checkRule({target: el}) {
  2964.     let json, error, title;
  2965.     const prev = el.previousElementSibling;
  2966.     if (el.value) {
  2967.       json = Ruler.parse(el.value);
  2968.       error = json instanceof Error && (json.message || String(json));
  2969.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2970.         !/^[-.a-z0-9]*$/i.test(json.d);
  2971.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2972.         .filter(Boolean).join('\n');
  2973.       el.classList.toggle('invalid-domain', invalidDomain);
  2974.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  2975.       if (!prev)
  2976.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2977.     } else if (prev) {
  2978.       prev.focus();
  2979.       el.remove();
  2980.     }
  2981.     el[RULE] = !error && json;
  2982.     el.title = title;
  2983.     el.setCustomValidity(error || '');
  2984.   }
  2985.  
  2986.   async function focusRule({target: el, relatedTarget: from}) {
  2987.     if (el === this)
  2988.       return;
  2989.     await new Promise(setTimeout);
  2990.     if (el[RULE] && el.rows < 2) {
  2991.       let i = el.selectionStart;
  2992.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  2993.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  2994.       el.setSelectionRange(i, i);
  2995.       el.rows = txt.match(/^/gm).length;
  2996.     }
  2997.     if (!this.contains(from))
  2998.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2999.   }
  3000.  
  3001.   function installRule(rule) {
  3002.     const inputs = UI._rules.children;
  3003.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3004.     if (!el) {
  3005.       el = inputs[0];
  3006.       el[RULE] = rule;
  3007.       el.value = Ruler.format(rule);
  3008.       el.hidden = false;
  3009.       const i = Math.max(0, collectRules().indexOf(rule));
  3010.       inputs[i].insertAdjacentElement('afterend', el);
  3011.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3012.     }
  3013.     const rect = el.getBoundingClientRect();
  3014.     if (rect.bottom < 0 ||
  3015.         rect.bottom > el.parentNode.offsetHeight)
  3016.       el.scrollIntoView();
  3017.     el.classList.add('highlight');
  3018.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3019.     el.focus();
  3020.   }
  3021.  
  3022.   function renderRules() {
  3023.     const rules = UI._rules;
  3024.     rules.addEventListener('input', checkRule);
  3025.     rules.addEventListener('focusin', focusRule);
  3026.     rules.addEventListener('paste', focusRule);
  3027.     blankRuleElement =
  3028.       setup.blankRuleElement =
  3029.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3030.     for (const rule of uiCfg.hosts || []) {
  3031.       const el = blankRuleElement.cloneNode();
  3032.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3033.       rules.appendChild(el);
  3034.       checkRule({target: el});
  3035.     }
  3036.     const search = UI._search;
  3037.     search.oninput = () => {
  3038.       setup.search = search.value;
  3039.       const s = search.value.toLowerCase();
  3040.       for (const el of rules.children)
  3041.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3042.     };
  3043.     search.value = setup.search || '';
  3044.     if (search.value)
  3045.       search.oninput();
  3046.   }
  3047.  
  3048.   function renderCustomScales() {
  3049.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3050.   }
  3051.  
  3052.   function renderAll() {
  3053.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3054.       if (el.id in uiCfg)
  3055.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3056.     for (const el of $$('input[type="range"]', root))
  3057.       el.oninput();
  3058.     for (const el of $$('a[href^="http"]', root))
  3059.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3060.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3061.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3062.   }
  3063. }
  3064.  
  3065. function setupClickedRule(event) {
  3066.   let rule;
  3067.   const el = event.target.closest('blockquote, code, pre');
  3068.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3069.     dropEvent(event);
  3070.     setup({rule});
  3071.   }
  3072. }
  3073.  
  3074. async function setupRuleInstaller(e) {
  3075.   dropEvent(e);
  3076.   const parent = this.parentElement;
  3077.   parent.children._installLoading.hidden = false;
  3078.   this.remove();
  3079.   let rules;
  3080.  
  3081.   try {
  3082.     rules = extractRules(await Remoting.getDoc(this.href));
  3083.     const selector = $create('select', {
  3084.       size: 8,
  3085.       style: 'width: 100%',
  3086.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3087.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3088.     });
  3089.     selector.append(...rules.map(renderRule));
  3090.     selector.selectedIndex = findMatchingRuleIndex();
  3091.     parent.children._installLoading.remove();
  3092.     parent.children._installHint.hidden = false;
  3093.     parent.appendChild(selector);
  3094.     requestAnimationFrame(() => {
  3095.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3096.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3097.       selector.focus();
  3098.     });
  3099.   } catch (e) {
  3100.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3101.   }
  3102.  
  3103.   function extractRules({doc}) {
  3104.     // sort by name
  3105.     return [...$$('#wiki-body tr', doc)]
  3106.       .map(tr => [
  3107.         tr.cells[0].textContent.trim(),
  3108.         Ruler.fromElement(tr.cells[1]),
  3109.       ])
  3110.       .filter(([name, r]) =>
  3111.         name && r && (!r.d || hostname.includes(r.d)))
  3112.       .sort(([a], [b]) =>
  3113.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3114.           a > b ? 1 :
  3115.             0);
  3116.   }
  3117.  
  3118.   function findMatchingRuleIndex() {
  3119.     const dottedHost = `.${hostname}.`;
  3120.     let maxCount = 0, maxIndex = 0, index = 0;
  3121.     for (const [name, {d}] of rules) {
  3122.       let count = !!(d && hostname.includes(d)) * 10;
  3123.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3124.         count += dottedHost.includes(`.${part}.`) && part.length;
  3125.       if (count > maxCount) {
  3126.         maxCount = count;
  3127.         maxIndex = index;
  3128.       }
  3129.       index++;
  3130.     }
  3131.     return maxIndex;
  3132.   }
  3133.  
  3134.   function renderRule([name, rule]) {
  3135.     return $create('option', {
  3136.       textContent: name,
  3137.       title: Ruler.format(rule, {expand: true})
  3138.         .replace(/^{|\s*}$/g, '')
  3139.         .split('\n')
  3140.         .slice(0, 12)
  3141.         .map(renderTitleLine)
  3142.         .filter(Boolean)
  3143.         .join('\n'),
  3144.     });
  3145.   }
  3146.  
  3147.   function renderTitleLine(line, i, arr) {
  3148.     return (
  3149.       // show ... on 10th line if there are more lines
  3150.       i === 9 && arr.length > 10 ? '...' :
  3151.         i > 10 ? '' :
  3152.           // truncate to 100 chars
  3153.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3154.             // strip the leading space
  3155.             .replace(/^\s/, ''));
  3156.   }
  3157.  
  3158.   function maybeSetup(e) {
  3159.     if (!eventModifiers(e))
  3160.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3161.   }
  3162. }
  3163.  
  3164. function createConfigHtml() {
  3165.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/Rules';
  3166.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3167.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3168.   return flattenHtml(`
  3169. <style>
  3170.   :host {
  3171.     all: initial !important;
  3172.     position: fixed !important;
  3173.     z-index: 2147483647 !important;
  3174.     top: 20px !important;
  3175.     right: 20px !important;
  3176.     padding: 1.5em !important;
  3177.     color: #000 !important;
  3178.     background: #eee !important;
  3179.     box-shadow: 5px 5px 25px 2px #000 !important;
  3180.     width: 33em !important;
  3181.     border: 1px solid black !important;
  3182.     display: flex !important;
  3183.     flex-direction: column !important;
  3184.   }
  3185.   main {
  3186.     font: 12px/15px sans-serif;
  3187.   }
  3188.   table {
  3189.     text-align:left;
  3190.   }
  3191.   ul {
  3192.     max-height: calc(100vh - 200px);
  3193.     margin: 0 0 15px 0;
  3194.     padding: 0;
  3195.     list-style: none;
  3196.   }
  3197.   li {
  3198.     margin: 0;
  3199.     padding: .25em 0;
  3200.   }
  3201.   li.options {
  3202.     display: flex;
  3203.     align-items: center;
  3204.     justify-content: space-between;
  3205.   }
  3206.   li.row {
  3207.     flex-wrap: wrap;
  3208.     justify-content: flex-start;
  3209.   }
  3210.   li.row label {
  3211.     flex-direction: row;
  3212.     align-items: center;
  3213.   }
  3214.   li.row input {
  3215.     margin-right: .25em;
  3216.   }
  3217.   li.stretch label {
  3218.     flex: 1;
  3219.     white-space: nowrap;
  3220.   }
  3221.   li.stretch label > span {
  3222.     display: flex;
  3223.     flex-direction: row;
  3224.     flex: 1;
  3225.   }
  3226.   label {
  3227.     display: inline-flex;
  3228.     flex-direction: column;
  3229.   }
  3230.   label:not(:last-child) {
  3231.     margin-right: 1em;
  3232.   }
  3233.   input, select {
  3234.     min-height: 1.6em;
  3235.     box-sizing: border-box;
  3236.   }
  3237.   input[type=checkbox] {
  3238.     margin-left: 0;
  3239.   }
  3240.   input[type=number] {
  3241.     width: 4em;
  3242.   }
  3243.   input:not([type=checkbox])  {
  3244.     padding: 0 .25em;
  3245.   }
  3246.   input[type=range] {
  3247.     flex: 1;
  3248.     width: 100%;
  3249.     margin: 0 .25em;
  3250.     padding: 0;
  3251.     filter: saturate(0);
  3252.     opacity: .5;
  3253.   }
  3254.   u + input[type=range] {
  3255.     max-width: 3em;
  3256.   }
  3257.   input[type=range]:hover {
  3258.     filter: none;
  3259.     opacity: 1;
  3260.   }
  3261.   input[type=color] {
  3262.     position: absolute;
  3263.     width: calc(1.5em + 2px);
  3264.     opacity: 0;
  3265.     cursor: pointer;
  3266.   }
  3267.   u {
  3268.     position: relative;
  3269.     flex: 0 0 1.5em;
  3270.     height: 1.5em;
  3271.     border: 1px solid #888;
  3272.     pointer-events: none;
  3273.     color: #888;
  3274.     background-image:
  3275.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3276.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3277.     background-size: .5em .5em;
  3278.     background-position: 0 0, .25em .25em;
  3279.   }
  3280.   u::after {
  3281.     position: absolute;
  3282.     top: 0;
  3283.     left: 0;
  3284.     right: 0;
  3285.     bottom: 0;
  3286.     content: "";
  3287.     background-color: var(--color);
  3288.   }
  3289.   .range-edit {
  3290.     position: absolute;
  3291.     box-shadow: 0 0.25em 1em #000;
  3292.     z-index: 99;
  3293.   }
  3294.   textarea {
  3295.     resize: vertical;
  3296.     margin: 1px 0;
  3297.     font: 11px/1.25 Consolas, monospace;
  3298.   }
  3299.   :invalid {
  3300.     background-color: #f002;
  3301.     border-color: #800;
  3302.   }
  3303.   code {
  3304.     font-weight: bold;
  3305.   }
  3306.   a {
  3307.     text-decoration: none;
  3308.   }
  3309.   a:hover {
  3310.     text-decoration: underline;
  3311.   }
  3312.   button {
  3313.     padding: .2em 1em;
  3314.     margin: 0 1em;
  3315.   }
  3316.   kbd {
  3317.     padding: 1px 6px;
  3318.     font-weight: bold;
  3319.     font-family: Consolas, monospace;
  3320.     border: 1px solid #888;
  3321.     border-radius: 3px;
  3322.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3323.   }
  3324.   .column {
  3325.     display: flex;
  3326.     flex-direction: column;
  3327.   }
  3328.   .highlight {
  3329.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3330.     animation-fill-mode: both;
  3331.   }
  3332.   #_rules > * {
  3333.     word-break: break-all;
  3334.   }
  3335.   #_rules > :not(:focus) {
  3336.     overflow: hidden; /* prevents wrapping in FF */
  3337.   }
  3338.   .invalid-domain {
  3339.     opacity: .5;
  3340.   }
  3341.   .matching-domain {
  3342.     border-color: #56b8ff;
  3343.     background: #d7eaff;
  3344.   }
  3345.   #_x {
  3346.     position: absolute;
  3347.     top: 0;
  3348.     right: 0;
  3349.     padding: 4px 8px;
  3350.     cursor: pointer;
  3351.     user-select: none;
  3352.   }
  3353.   #_x:hover {
  3354.     background-color: #8884;
  3355.   }
  3356.   #_cssApp {
  3357.     color: seagreen;
  3358.   }
  3359.   #_exportNotification {
  3360.     color: green;
  3361.     font-weight: bold;
  3362.     position: absolute;
  3363.     left: 0;
  3364.     right: 0;
  3365.     bottom: 2px;
  3366.   }
  3367.   #_installHint {
  3368.     color: green;
  3369.   }
  3370.   @keyframes fade-in {
  3371.     from { background-color: deepskyblue }
  3372.     to {}
  3373.   }
  3374.   @media (prefers-color-scheme: dark) {
  3375.     :host {
  3376.       color: #aaa !important;
  3377.       background: #333 !important;
  3378.     }
  3379.     a {
  3380.       color: deepskyblue;
  3381.     }
  3382.     button {
  3383.       background: linear-gradient(-5deg, #333, #555);
  3384.       border: 1px solid #000;
  3385.       box-shadow: 0 2px 6px #181818;
  3386.       border-radius: 3px;
  3387.       cursor: pointer;
  3388.     }
  3389.     button:hover {
  3390.       background: linear-gradient(-5deg, #333, #666);
  3391.     }
  3392.     textarea, input, select {
  3393.       background: #111;
  3394.       color: #BBB;
  3395.       border: 1px solid #555;
  3396.     }
  3397.     input[type=checkbox] {
  3398.       filter: invert(1);
  3399.     }
  3400.     input[type=range] {
  3401.       filter: invert(1) saturate(0);
  3402.     }
  3403.     input[type=range]:hover {
  3404.       filter: invert(1);
  3405.     }
  3406.     kbd {
  3407.       border-color: #666;
  3408.     }
  3409.     @supports (-moz-appearance: none) {
  3410.       input[type=checkbox],
  3411.       input[type=range],
  3412.       input[type=range]:hover {
  3413.         filter: none;
  3414.       }
  3415.     }
  3416.     .range-edit {
  3417.       box-shadow: 0 .5em 1em .5em #000;
  3418.     }
  3419.     .matching-domain {
  3420.       border-color: #0065af;
  3421.       background: #032b58;
  3422.       color: #ddd;
  3423.     }
  3424.     #_cssApp {
  3425.       color: darkseagreen;
  3426.     }
  3427.     #_installHint {
  3428.       color: greenyellow;
  3429.     }
  3430.     ::-webkit-scrollbar {
  3431.       width: 14px;
  3432.       height: 14px;
  3433.       background: #333;
  3434.     }
  3435.     ::-webkit-scrollbar-button:single-button {
  3436.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3437.     }
  3438.     ::-webkit-scrollbar-track-piece {
  3439.       background: #444;
  3440.       border: 4px solid #333;
  3441.       border-radius: 8px;
  3442.     }
  3443.     ::-webkit-scrollbar-thumb {
  3444.       border: 3px solid #333;
  3445.       border-radius: 8px;
  3446.       background: #666;
  3447.     }
  3448.     ::-webkit-resizer {
  3449.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3450.       border: 2px solid transparent;
  3451.     }
  3452.   }
  3453. </style>
  3454. <style id="_css">${cfg._getCss()}</style>
  3455. <main id="${PREFIX}setup">
  3456.   <div id=_x>x</div>
  3457.   <ul class=column>
  3458.     <details style="margin: -1em 0 0">
  3459.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3460.       <table>
  3461.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3462.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3463.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3464.         <tr><th>Force-activate<br>(for small pics)</th>
  3465.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3466.         <tr><td>&nbsp;</td></tr>
  3467.         <tr><th>Start zooming</th>
  3468.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3469.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3470.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3471.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3472.         <tr><th>Previous/next<br>in album</th>
  3473.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3474.         <tr><td>&nbsp;</td></tr>
  3475.       </table>
  3476.       <table>
  3477.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3478.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3479.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3480.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3481.       </table>
  3482.     </details>
  3483.     <li class=options>
  3484.       <label>Popup shows on
  3485.         <select id=start>
  3486.           <option value=context>Right-click / &#8801; / Ctrl
  3487.           <option value=contextMK>Right-click / &#8801;
  3488.           <option value=contextM>Right-click
  3489.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3490.           <option value=ctrl>Ctrl
  3491.           <option value=auto>automatically
  3492.         </select>
  3493.       </label>
  3494.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3495.       <label title="(if the full version of the hovered image is ...% larger)">
  3496.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3497.       </label>
  3498.       <label>Zoom activates on
  3499.         <select id=zoom>
  3500.           <option value=context>Right click / Shift
  3501.           <option value=wheel>Wheel up / Shift
  3502.           <option value=shift>Shift
  3503.           <option value=auto>automatically
  3504.         </select>
  3505.       </label>
  3506.       <label>...and zooms to
  3507.         <select id=fit>
  3508.           <option value=all>fit to window
  3509.           <option value=large>fit if larger
  3510.           <option value=no>100%
  3511.           <option value="" title="Use custom scale factors">custom
  3512.         </select>
  3513.       </label>
  3514.     </li>
  3515.     <li class=options>
  3516.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3517.       </label>
  3518.       <label>When fully zoomed out:
  3519.         <select id=zoomOut>
  3520.           <option value=stay>stay in zoom mode
  3521.           <option value=auto>stay if still hovered
  3522.           <option value=unzoom>undo zoom mode
  3523.           <option value=close>close popup
  3524.         </select>
  3525.       </label>
  3526.       <label style="flex: 1" title="${trimLeft(`
  3527.         Scale factors to use when “zooms to” selector is set to “custom”.
  3528.         0 = fit to window,
  3529.         0! = same as 0 but also removes smaller values,
  3530.         * after a value marks the default zoom factor, for example: 1*
  3531.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3532.         ${scalesHint}
  3533.       `)}">Custom scale factors:
  3534.         <input id=scales placeholder="${scalesHint}">
  3535.       </label>
  3536.     </li>
  3537.     <li class="options row">
  3538.       <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3539.         <input type=checkbox id=center>Centered*</label>
  3540.       <label title="Provides smoother experience but increases network traffic">
  3541.         <input type=checkbox id=preload>Preload on hover*</label>
  3542.       <label title="...or show a partial image while still loading">
  3543.         <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3544.       <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3545.       <label><input type=checkbox id=mute>Mute videos</label>
  3546.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3547.       <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3548.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt;*</label>
  3549.       <label title="Disable only if you spoof the HTTP headers yourself">
  3550.         <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3551.       <label style="width:100%"><input type=checkbox id=startAltShown>
  3552.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3553.     </li>
  3554.     <li class="options stretch">
  3555.       <label>Background
  3556.         <span>
  3557.           <input id=uiBackgroundColor type=color><u></u>
  3558.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3559.         </span>
  3560.       </label>
  3561.       <label>Border color, opacity, size
  3562.         <span>
  3563.           <input id=uiBorderColor type=color><u></u>
  3564.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3565.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3566.         </span>
  3567.       </label>
  3568.       <label>Shadow color, opacity, size
  3569.         <span>
  3570.           <input id=uiShadowColor type=color><u></u>
  3571.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3572.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3573.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3574.         </span>
  3575.       </label>
  3576.       <label>Padding
  3577.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3578.       </label>
  3579.       <label>Margin
  3580.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3581.       </label>
  3582.     </li>
  3583.     <li>
  3584.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3585.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3586.       <a href="#" id=_reveal style="float: right"
  3587.          title="You can copy parts of it to override them in your custom CSS">
  3588.          View the built-in CSS</a>
  3589.       <div class=column>
  3590.         <textarea id=css spellcheck=false></textarea>
  3591.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3592.       </div>
  3593.     </li>
  3594.     <li style="display: flex; justify-content: space-between;">
  3595.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3596.       <div style="white-space: nowrap">
  3597.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3598.         in "d" value, for example <code>"d": "!foo.com"</code>
  3599.       </div>
  3600.       <div>
  3601.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3602.       </div>
  3603.     </li>
  3604.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3605.       <div id=_rules class=column>
  3606.         <textarea rows=1 spellcheck=false></textarea>
  3607.       </div>
  3608.     </li>
  3609.     <li>
  3610.       <div hidden id=_installLoading>Loading...</div>
  3611.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3612.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3613.       <a href="${MPIV_BASE_URL}" id=_install>Install rule from repository...</a>
  3614.     </li>
  3615.   </ul>
  3616.   <div style="text-align:center">
  3617.     <button id=_ok accesskey=s>OK</button>
  3618.     <button id=_apply accesskey=a>Apply</button>
  3619.     <button id=_import style="margin-right: 0">Import</button>
  3620.     <button id=_export style="margin-left: 0">Export</button>
  3621.     <button id=_cancel>Cancel</button>
  3622.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3623.   </div>
  3624. </main>`);
  3625. }
  3626.  
  3627. function createGlobalStyle() {
  3628.   App.globalStyle = /*language=CSS*/ (String.raw`
  3629. #\mpiv-bar {
  3630.   position: fixed;
  3631.   z-index: 2147483647;
  3632.   top: 0;
  3633.   left: 0;
  3634.   right: 0;
  3635.   opacity: 0;
  3636.   transition: opacity 1s ease .25s;
  3637.   text-align: center;
  3638.   font-family: sans-serif;
  3639.   font-size: 15px;
  3640.   font-weight: bold;
  3641.   background: #0005;
  3642.   color: white;
  3643.   padding: 4px 10px;
  3644.   text-shadow: .5px .5px 2px #000;
  3645. }
  3646. #\mpiv-bar.\mpiv-show,
  3647. #\mpiv-bar[data-force] {
  3648.   opacity: 1;
  3649. }
  3650. #\mpiv-bar[data-zoom]::after {
  3651.   content: " (" attr(data-zoom) ")";
  3652.   opacity: .8;
  3653. }
  3654. #\mpiv-popup.\mpiv-show {
  3655.   display: inline;
  3656. }
  3657. #\mpiv-popup {
  3658.   display: none;
  3659.   cursor: none;
  3660. ${cfg.uiFadein ? String.raw`
  3661.   animation: .2s \mpiv-fadein both;
  3662.   transition: box-shadow .25s, background-color .25s;
  3663.   ` : ''}
  3664. ${App.popupStyleBase = `
  3665.   border: none;
  3666.   box-sizing: border-box;
  3667.   position: fixed;
  3668.   z-index: 2147483647;
  3669.   padding: 0;
  3670.   margin: 0;
  3671.   top: 0;
  3672.   left: 0;
  3673.   width: auto;
  3674.   height: auto;
  3675.   transform-origin: center;
  3676.   max-width: none;
  3677.   max-height: none;
  3678. `}
  3679. }
  3680. #\mpiv-popup.\mpiv-show {
  3681.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3682.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3683.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3684.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3685. }
  3686. #\mpiv-popup.\mpiv-show[loaded] {
  3687.   background-color: ${Util.color('Background')};
  3688.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3689. }
  3690. #\mpiv-popup[data-no-aa],
  3691. #\mpiv-popup.\mpiv-zoom-max {
  3692.   image-rendering: pixelated;
  3693. }
  3694. #\mpiv-setup {
  3695. }
  3696. @keyframes \mpiv-fadein {
  3697.   from {
  3698.     opacity: 0;
  3699.     border-color: transparent;
  3700.   }
  3701.   to {
  3702.     opacity: 1;
  3703.   }
  3704. }
  3705. ` + (cfg.globalStatus ? String.raw`
  3706. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3707.   cursor: progress !important;
  3708. }
  3709. :root.\mpiv-edge #\mpiv-popup {
  3710.   cursor: default;
  3711. }
  3712. :root.\mpiv-error *:hover {
  3713.   cursor: not-allowed !important;
  3714. }
  3715. :root.\mpiv-ready *:hover,
  3716. :root.\mpiv-large *:hover {
  3717.   cursor: zoom-in !important;
  3718. }
  3719. :root.\mpiv-shift *:hover {
  3720.   cursor: default !important;
  3721. }
  3722. ` : String.raw`
  3723. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3724.   cursor: progress;
  3725. }
  3726. [\mpiv-status~="edge"]:hover {
  3727.   cursor: default;
  3728. }
  3729. [\mpiv-status~="error"]:hover {
  3730.   cursor: not-allowed;
  3731. }
  3732. [\mpiv-status~="ready"]:hover,
  3733. [\mpiv-status~="large"]:hover {
  3734.   cursor: zoom-in;
  3735. }
  3736. [\mpiv-status~="shift"]:hover {
  3737.   cursor: default;
  3738. }
  3739. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3740.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3741.   return App.globalStyle;
  3742. }
  3743.  
  3744. //#region Global utilities
  3745.  
  3746. const clamp = (v, min, max) =>
  3747.   v < min ? min : v > max ? max : v;
  3748.  
  3749. const compareNumbers = (a, b) =>
  3750.   a - b;
  3751.  
  3752. const flattenHtml = str =>
  3753.   str.trim().replace(/\n\s*/g, '');
  3754.  
  3755. const dropEvent = e =>
  3756.   (e.preventDefault(), e.stopPropagation());
  3757.  
  3758. const ensureArray = v =>
  3759.   Array.isArray(v) ? v : [v];
  3760.  
  3761. /** @param {KeyboardEvent} e */
  3762. const eventModifiers = e =>
  3763.   (e.altKey ? '!' : '') +
  3764.   (e.ctrlKey ? '^' : '') +
  3765.   (e.metaKey ? '#' : '') +
  3766.   (e.shiftKey ? '+' : '');
  3767.  
  3768. const now = performance.now.bind(performance);
  3769.  
  3770. const sumProps = (...props) => {
  3771.   let sum = 0;
  3772.   for (const p of props)
  3773.     sum += parseFloat(p) || 0;
  3774.   return sum;
  3775. };
  3776.  
  3777. const tryCatch = function (fn, ...args) {
  3778.   try {
  3779.     return fn.apply(this, args);
  3780.   } catch (e) {}
  3781. };
  3782.  
  3783. const $ = (sel, node = doc) =>
  3784.   node.querySelector(sel) || false;
  3785.  
  3786. const $$ = (sel, node = doc) =>
  3787.   node.querySelectorAll(sel);
  3788.  
  3789. const $create = (tag, props) =>
  3790.   Object.assign(doc.createElement(tag), props);
  3791.  
  3792. const $css = (el, props) =>
  3793.   Object.entries(props).forEach(([k, v]) =>
  3794.     el.style.setProperty(k, v, 'important'));
  3795.  
  3796. const $many = (q, doc) => {
  3797.   for (const selector of ensureArray(q)) {
  3798.     const el = selector && $(selector, doc);
  3799.     if (el)
  3800.       return el;
  3801.   }
  3802. };
  3803.  
  3804. const $prop = (sel, prop, node = doc) =>
  3805.   (node = $(sel, node)) && node[prop] || '';
  3806.  
  3807. const $propUp = (node, prop) =>
  3808.   (node = node.closest(`[${prop}]`)) &&
  3809.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3810.   '';
  3811.  
  3812. const $remove = node =>
  3813.   node && node.remove();
  3814.  
  3815. //#endregion
  3816. //#region Init
  3817.  
  3818. Config.load({save: true}).then(res => {
  3819.   cfg = res;
  3820.   if (Menu) Menu.register();
  3821.  
  3822.   if (doc.body) App.checkImageTab();
  3823.   else doc.addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3824.  
  3825.   doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3826.   doc.addEventListener('contextmenu', Events.onContext);
  3827.   doc.addEventListener('keydown', Events.onKeyDown);
  3828.   if (['gf.qytechs.cn', 'github.com'].includes(hostname))
  3829.     doc.addEventListener('click', setupClickedRule);
  3830.   window.addEventListener('message', App.onMessage);
  3831. });
  3832.  
  3833. //#endregion

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