☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-04-15 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_setClipboard
  13. // @grant       GM_setValue
  14. // @grant       GM_xmlhttpRequest
  15. //
  16. // @grant       GM.getValue
  17. // @grant       GM.openInTab
  18. // @grant       GM.registerMenuCommand
  19. // @grant       GM.setClipboard
  20. // @grant       GM.setValue
  21. // @grant       GM.xmlHttpRequest
  22. //
  23. // @version     1.2.4
  24. // @author      tophf
  25. //
  26. // @original-version 2017.9.29
  27. // @original-author  kuehlschrank
  28. //
  29. // @connect     *
  30. // CSP check:
  31. // @connect     self
  32. // rule installer in config dialog:
  33. // @connect     github.com
  34. // big/trusted hostings for the built-in rules with "q":
  35. // @connect     deviantart.com
  36. // @connect     facebook.com
  37. // @connect     fbcdn.com
  38. // @connect     flickr.com
  39. // @connect     gfycat.com
  40. // @connect     googleusercontent.com
  41. // @connect     gyazo.com
  42. // @connect     imgur.com
  43. // @connect     instagr.am
  44. // @connect     instagram.com
  45. // @connect     prnt.sc
  46. // @connect     prntscr.com
  47. // @connect     user-images.githubusercontent.com
  48. //
  49. // @supportURL  https://github.com/tophf/mpiv/issues
  50. // @icon        https://github.com/tophf/mpiv/raw/master/icon.png
  51. // ==/UserScript==
  52.  
  53. 'use strict';
  54.  
  55. //#region Globals
  56.  
  57. /** @type mpiv.Config */
  58. let cfg;
  59. /** @type mpiv.AppInfo */
  60. let ai = {rule: {}};
  61. /** @type Element */
  62. let elConfig;
  63.  
  64. const doc = document;
  65. const hostname = location.hostname;
  66. const dotDomain = '.' + hostname;
  67. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  68. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  69. const isFF = CSS.supports('-moz-appearance', 'none');
  70. const AudioContext = window.AudioContext || function () {};
  71.  
  72. const PREFIX = 'mpiv-';
  73. const STATUS_ATTR = `${PREFIX}status`;
  74. const MSG = Object.assign({}, ...[
  75.   'getViewSize',
  76.   'viewSize',
  77. ].map(k => ({[k]: `${PREFIX}${k}`})));
  78. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  79. // time for volatile things to settle down meanwhile we postpone action
  80. // examples: loading image from cache, quickly moving mouse over one element to another
  81. const SETTLE_TIME = 50;
  82. // used to detect JS code in host rules
  83. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  84. const RX_MEDIA_URL = /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i;
  85. const ZOOM_MAX = 16;
  86. const SYM_U = Symbol('u');
  87.  
  88. //#endregion
  89. //#region GM4 polyfill
  90.  
  91. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  92.   this.GM = {info: GM_info};
  93. if (!GM.getValue)
  94.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  95. if (!GM.setValue)
  96.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  97. if (!GM.openInTab)
  98.   GM.openInTab = GM_openInTab;
  99. if (!GM.registerMenuCommand)
  100.   GM.registerMenuCommand = GM_registerMenuCommand;
  101. if (!GM.setClipboard)
  102.   GM.setClipboard = GM_setClipboard;
  103. if (!GM.xmlHttpRequest)
  104.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  105.  
  106. //#endregion
  107.  
  108. const App = {
  109.  
  110.   isEnabled: true,
  111.   isImageTab: false,
  112.   globalStyle: '',
  113.   popupStyleBase: '',
  114.  
  115.   activate(info, event) {
  116.     const {match, node, rule, url} = info;
  117.     if (elConfig) console.info({node, rule, url, match});
  118.     if (ai.node) App.deactivate();
  119.     ai = info;
  120.     ai.force = event.ctrlKey;
  121.     ai.gNum = 0;
  122.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  123.     Util.suppressTooltip();
  124.     Calc.updateViewSize();
  125.     Events.toggle(true);
  126.     Events.trackMouse(event);
  127.     if (CspSniffer.init && location.protocol === 'https:')
  128.       CspSniffer.init();
  129.     if (ai.force) {
  130.       App.start();
  131.     } else if (cfg.start === 'auto' && !rule.manual) {
  132.       App.belate();
  133.     } else {
  134.       Status.set('ready');
  135.     }
  136.   },
  137.  
  138.   belate() {
  139.     if (cfg.preload) {
  140.       ai.preloadStart = now();
  141.       App.start();
  142.       Status.set('+preloading');
  143.       setTimeout(Status.set, cfg.delay, '-preloading');
  144.     } else {
  145.       ai.timer = setTimeout(App.start, cfg.delay);
  146.     }
  147.   },
  148.  
  149.   checkImageTab() {
  150.     const el = doc.body.firstElementChild;
  151.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  152.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  153.   },
  154.  
  155.   checkProgress({start} = {}) {
  156.     const p = ai.popup;
  157.     if (!p)
  158.       return;
  159.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  160.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  161.     if (h)
  162.       return App.canCommit(w, h);
  163.     if (start) {
  164.       clearInterval(ai.timerProgress);
  165.       ai.timerProgress = setInterval(App.checkProgress, 150);
  166.     }
  167.   },
  168.  
  169.   canCommit(w, h) {
  170.     if (!ai.force && ai.rect && !ai.gItems &&
  171.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  172.       App.deactivate();
  173.       return false;
  174.     }
  175.     App.stopTimers();
  176.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  177.     if (wait > 0) {
  178.       ai.timer = setTimeout(App.checkProgress, wait);
  179.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  180.       App.handleError({type: 'error'});
  181.     } else {
  182.       App.commit();
  183.     }
  184.     return true;
  185.   },
  186.  
  187.   async commit() {
  188.     const p = ai.popup;
  189.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  190.     if (isDecoded) {
  191.       await p.decode();
  192.       if (p !== ai.popup)
  193.         return;
  194.     }
  195.     App.updateStyles();
  196.     Calc.measurePopup();
  197.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  198.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  199.     if (willMove)
  200.       Popup.move();
  201.     Bar.updateName();
  202.     Bar.updateDetails();
  203.     Status.set(!ai.popupLoaded && 'loading');
  204.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  205.                ai.nheight > p.clientHeight + ai.extras.h;
  206.     if (ai.large) {
  207.       Status.set('+large');
  208.       // prevent a blank bg+border in FF
  209.       if (isFF && p.complete && !isDecoded)
  210.         p.style.backgroundImage = `url('${p.src}')`;
  211.     }
  212.   },
  213.  
  214.   deactivate({wait} = {}) {
  215.     App.stopTimers();
  216.     if (ai.req)
  217.       tryCatch.call(ai.req, ai.req.abort);
  218.     if (ai.tooltip)
  219.       ai.tooltip.node.title = ai.tooltip.text;
  220.     Status.set(false);
  221.     Bar.set(false);
  222.     Events.toggle(false);
  223.     Popup.destroy();
  224.     if (wait) {
  225.       App.isEnabled = false;
  226.       setTimeout(App.enable, 200);
  227.     }
  228.     ai = {rule: {}};
  229.   },
  230.  
  231.   enable() {
  232.     App.isEnabled = true;
  233.   },
  234.  
  235.   handleError(e, rule = ai.rule) {
  236.     if (rule && rule.onerror === 'skip')
  237.       return;
  238.     const fe = Util.formatError(e, rule);
  239.     if (!rule || !ai.urls || !ai.urls.length)
  240.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  241.     if (ai.urls && ai.urls.length) {
  242.       ai.url = ai.urls.shift();
  243.       if (ai.url) {
  244.         App.stopTimers();
  245.         App.startSingle();
  246.       } else {
  247.         App.deactivate();
  248.       }
  249.     } else if (ai.node) {
  250.       Status.set('error');
  251.       Bar.set(fe.message, 'error');
  252.     }
  253.   },
  254.  
  255.   /** @param {MessageEvent} e */
  256.   onMessage(e) {
  257.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  258.       for (const el of doc.getElementsByTagName('iframe')) {
  259.         if (el.contentWindow === e.source) {
  260.           const [w, h] = Calc.frameSize(el, window);
  261.           e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  262.           return;
  263.         }
  264.       }
  265.     }
  266.   },
  267.  
  268.   /** @param {MessageEvent} e */
  269.   onMessageChild(e) {
  270.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  271.       window.removeEventListener('message', App.onMessageChild);
  272.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  273.       if (w && h) ai.view = {w, h};
  274.     }
  275.   },
  276.  
  277.   start() {
  278.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  279.     if (!Util.isHovered(ai.node)) {
  280.       App.deactivate();
  281.       return;
  282.     }
  283.     App.updateStyles();
  284.     if (ai.gallery)
  285.       App.startGallery();
  286.     else
  287.       App.startSingle();
  288.   },
  289.  
  290.   startSingle() {
  291.     Status.loading();
  292.     ai.imageUrl = null;
  293.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  294.       Remoting.findRedirect();
  295.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  296.       App.startFromQ();
  297.     } else {
  298.       Popup.create(ai.url);
  299.       Ruler.runC();
  300.     }
  301.   },
  302.  
  303.   async startFromQ() {
  304.     try {
  305.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  306.       const url = Ruler.runQ(responseText, doc, finalUrl);
  307.       if (!url)
  308.         throw 'The "q" rule did not produce any URL.';
  309.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  310.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  311.         if (!info || !info.url)
  312.           throw `Couldn't follow URL: ${url}`;
  313.         Object.assign(ai, info);
  314.         App.startSingle();
  315.       } else {
  316.         Popup.create(url, finalUrl);
  317.         Ruler.runC(responseText, doc);
  318.       }
  319.     } catch (e) {
  320.       App.handleError(e);
  321.     }
  322.   },
  323.  
  324.   async startGallery() {
  325.     Status.loading();
  326.     try {
  327.       const startUrl = ai.url;
  328.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  329.       const items = await new Promise(resolve => {
  330.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  331.           resolve);
  332.         if (Array.isArray(it))
  333.           resolve(it);
  334.       });
  335.       // bail out if the gallery's async callback took too long
  336.       if (ai.url !== startUrl) return;
  337.       ai.gNum = items.length;
  338.       ai.gItems = items.length && items;
  339.       if (ai.gItems) {
  340.         const i = items.index;
  341.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  342.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  343.             Gallery.findIndex(ai.url);
  344.         setTimeout(Gallery.next);
  345.       } else {
  346.         throw 'Empty gallery';
  347.       }
  348.     } catch (e) {
  349.       App.handleError(e);
  350.     }
  351.   },
  352.  
  353.   stopTimers() {
  354.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  355.       clearTimeout(ai[timer]);
  356.     clearInterval(ai.timerProgress);
  357.   },
  358.  
  359.   toggleZoom({keepScale} = {}) {
  360.     const p = ai.popup;
  361.     if (!p || !ai.scales || ai.scales.length < 2)
  362.       return;
  363.     ai.zoomed = !ai.zoomed;
  364.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  365.     if (ai.zooming)
  366.       p.classList.add(`${PREFIX}zooming`);
  367.     Popup.move();
  368.     Bar.updateDetails();
  369.     Status.set(ai.zoomed ? 'zoom' : false);
  370.     return ai.zoomed;
  371.   },
  372.  
  373.   updateStyles() {
  374.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  375.     Util.addStyle('rule', ai.rule.css || '');
  376.   },
  377. };
  378.  
  379. const Bar = {
  380.  
  381.   set(label, className) {
  382.     let b = ai.bar;
  383.     if (typeof label !== 'string') {
  384.       $remove(b);
  385.       ai.bar = null;
  386.       return;
  387.     }
  388.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  389.     App.updateStyles();
  390.     Bar.updateDetails();
  391.     Bar.show();
  392.     b.innerHTML = label;
  393.     if (!b.parentNode) {
  394.       doc.body.appendChild(b);
  395.       Util.forceLayout(b);
  396.     }
  397.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  398.   },
  399.  
  400.   show(isForced) {
  401.     clearTimeout(ai.timerBar);
  402.     ai.bar.style.removeProperty('opacity');
  403.     if (isForced)
  404.       ai.bar.dataset.force = '';
  405.     else
  406.       ai.timerBar = setTimeout(Bar.hide, 3000);
  407.   },
  408.  
  409.   hide(isForced) {
  410.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  411.       $css(ai.bar, {opacity: 0});
  412.       delete ai.bar.dataset.force;
  413.     }
  414.   },
  415.  
  416.   updateName() {
  417.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  418.     if (gi) {
  419.       const item = gi[i];
  420.       const noDesc = !gi.some(_ => _.desc);
  421.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  422.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  423.         item.desc,
  424.       ].filter(Boolean).join(' - ')}`;
  425.       Bar.set(c.trim() || ' ', 'gallery', true);
  426.     } else if ('caption' in ai) {
  427.       Bar.set(ai.caption, 'caption');
  428.     } else if (ai.tooltip) {
  429.       Bar.set(ai.tooltip.text, 'tooltip');
  430.     } else {
  431.       Bar.set(' ', 'info');
  432.     }
  433.   },
  434.  
  435.   updateDetails() {
  436.     if (!ai.bar) return;
  437.     const r = ai.rotate;
  438.     const zoom = ai.nwidth && `${
  439.       Math.round(ai.scale * 100)
  440.     }%${
  441.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  442.     }${
  443.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  444.     }, ${
  445.       ai.nwidth
  446.     } x ${
  447.       ai.nheight
  448.     } px, ${
  449.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  450.     } MP`.replace(/\x20/g, '\xA0');
  451.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  452.       if (zoom) ai.bar.dataset.zoom = zoom;
  453.       else delete ai.bar.dataset.zoom;
  454.       Bar.show();
  455.     }
  456.   },
  457. };
  458.  
  459. const Calc = {
  460.  
  461.   frameSize(elFrame, parentWindow) {
  462.     if (!elFrame) return;
  463.     const r = elFrame.getBoundingClientRect();
  464.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  465.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  466.     return [w, h];
  467.   },
  468.  
  469.   generateScales(fit) {
  470.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  471.     const zoomStep = cfg.zoomStep / 100;
  472.     const arr = [scale];
  473.     if (fit !== 1) {
  474.       const diff = goal / scale;
  475.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  476.       const step = steps && Math.pow(diff, 1 / steps);
  477.       for (let i = steps; --i > 0;)
  478.         arr.push((scale *= step));
  479.       arr.push(scale = goal);
  480.     }
  481.     while ((scale *= zoomStep) <= ZOOM_MAX)
  482.       arr.push(scale);
  483.     return arr;
  484.   },
  485.  
  486.   measurePopup() {
  487.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  488.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  489.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  490.     if (p.clientWidth > nw) {
  491.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  492.       nh = ai.nheight = w / nw * nh | 0;
  493.       nw = ai.nwidth = w;
  494.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  495.     }
  496.     p.className = `${PREFIX}show`;
  497.     p.removeAttribute('style');
  498.     const s = getComputedStyle(p);
  499.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  500.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  501.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  502.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  503.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  504.     ai.extras = {
  505.       inw, inh,
  506.       outw, outh,
  507.       o: o2 / 2,
  508.       w: inw + outw,
  509.       h: inh + outh,
  510.     };
  511.     const fit = Math.min(
  512.       (ai.view.w - ai.extras.w) / ai.nwidth,
  513.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  514.     const isCustom = !cfg.fit && cfg.scales.length;
  515.     let cutoff = Math.min(1, fit);
  516.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  517.     if (isCustom) {
  518.       const dst = [];
  519.       for (const scale of cfg.scales) {
  520.         const val = parseFloat(scale) || fit;
  521.         dst.push(val);
  522.         if (isCustom && typeof scale === 'string') {
  523.           if (scale.includes('!')) cutoff = val;
  524.           if (scale.includes('*')) scaleZoom = val;
  525.         }
  526.       }
  527.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  528.     } else {
  529.       ai.scales = Calc.generateScales(fit);
  530.     }
  531.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  532.     ai.scaleFit = fit;
  533.     ai.scaleZoom = scaleZoom;
  534.   },
  535.  
  536.   rect() {
  537.     let {node, rule} = ai;
  538.     let n = rule.rect && node.closest(rule.rect);
  539.     if (n) return n.getBoundingClientRect();
  540.     const nested = node.getElementsByTagName('*');
  541.     let maxArea = 0;
  542.     let maxBounds;
  543.     n = node;
  544.     for (let i = 0; n; n = nested[i++]) {
  545.       const bounds = n.getBoundingClientRect();
  546.       const area = bounds.width * bounds.height;
  547.       if (area > maxArea) {
  548.         maxArea = area;
  549.         maxBounds = bounds;
  550.         node = n;
  551.       }
  552.     }
  553.     return maxBounds;
  554.   },
  555.  
  556.   scaleBiggerThan(scale, i, arr) {
  557.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  558.   },
  559.  
  560.   scaleIndex(dir) {
  561.     const i = ai.scales.indexOf(ai.scale);
  562.     if (i >= 0) return i + dir;
  563.     for (
  564.       let len = ai.scales.length,
  565.         i = dir > 0 ? 0 : len - 1;
  566.       i >= 0 && i < len;
  567.       i += dir
  568.     ) {
  569.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  570.         return i;
  571.     }
  572.     return -1;
  573.   },
  574.  
  575.   scaleForFirstZoom(keepScale) {
  576.     const z = ai.scaleZoom;
  577.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  578.   },
  579.  
  580.   updateViewSize() {
  581.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  582.     ai.view = {
  583.       w: view.clientWidth,
  584.       h: view.clientHeight,
  585.     };
  586.     if (window === top) return;
  587.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  588.     if (w && h) {
  589.       ai.view = {w, h};
  590.     } else {
  591.       window.addEventListener('message', App.onMessageChild);
  592.       parent.postMessage(MSG.getViewSize, '*');
  593.     }
  594.   },
  595. };
  596.  
  597. /** @namespace mpiv.Config */
  598. class Config {
  599.  
  600.   constructor({data: c, save}) {
  601.     if (typeof c === 'string')
  602.       c = tryCatch(JSON.parse, c);
  603.     if (typeof c !== 'object' || !c)
  604.       c = {};
  605.     const {/** @type mpiv.Config */ DEFAULTS} = Config;
  606.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  607.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  608.         '';
  609.     if (c.version !== DEFAULTS.version) {
  610.       if (typeof c.hosts === 'string')
  611.         c.hosts = c.hosts.split('\n')
  612.           .map(s => tryCatch(JSON.parse, s) || s)
  613.           .filter(Boolean);
  614.       if (c.close === true || c.close === false)
  615.         c.zoomOut = c.close ? 'auto' : 'stay';
  616.       for (const key in DEFAULTS)
  617.         if (typeof c[key] !== typeof DEFAULTS[key])
  618.           c[key] = DEFAULTS[key];
  619.       if (c.version === 3 && c.scales[0] === 0)
  620.         c.scales[0] = '0!';
  621.       for (const key in c)
  622.         if (!(key in DEFAULTS))
  623.           delete c[key];
  624.       c.version = DEFAULTS.version;
  625.       if (save)
  626.         GM.setValue('cfg', c);
  627.     }
  628.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  629.       App.globalStyle = '';
  630.     if (!Array.isArray(c.scales))
  631.       c.scales = [];
  632.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  633.     Object.assign(this, DEFAULTS, c);
  634.   }
  635.  
  636.   static async load(opts) {
  637.     opts.data = await GM.getValue('cfg');
  638.     return new Config(opts);
  639.   }
  640.  
  641.   _getCss() {
  642.     const {css} = this;
  643.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  644.   }
  645. }
  646.  
  647. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  648.   center: false,
  649.   css: '',
  650.   delay: 500,
  651.   fit: '',
  652.   globalStatus: false,
  653.   // prefer ' inside rules because " will be displayed as \"
  654.   // example: "img[src*='icon']"
  655.   hosts: [{
  656.     name: 'No popup for YouTube thumbnails',
  657.     d: 'www.youtube.com',
  658.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  659.     s: '',
  660.   }, {
  661.     name: 'No popup for SVG/PNG icons',
  662.     d: '',
  663.     e: "img[src*='icon']",
  664.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  665.     s: '',
  666.   }],
  667.   imgtab: false,
  668.   mute: false,
  669.   preload: false,
  670.   scale: 1.25,
  671.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  672.   start: 'auto',
  673.   uiBackgroundColor: '#ffffff',
  674.   uiBackgroundOpacity: 100,
  675.   uiBorderColor: '#000000',
  676.   uiBorderOpacity: 100,
  677.   uiBorder: 0,
  678.   uiFadein: true,
  679.   uiShadowColor: '#000000',
  680.   uiShadowOpacity: 80,
  681.   uiShadow: 20,
  682.   uiPadding: 0,
  683.   uiMargin: 0,
  684.   version: 6,
  685.   waitLoad: false,
  686.   xhr: true,
  687.   zoom: 'context',
  688.   zoomOut: 'auto',
  689.   zoomStep: 133,
  690. });
  691.  
  692. const CspSniffer = {
  693.  
  694.   /** @type {?Object<string,string[]>} */
  695.   csp: null,
  696.   /** @type {?Promise<void>} */
  697.   initPending: null,
  698.   selfUrl: location.origin + '/',
  699.  
  700.   // will be null when done
  701.   init() {
  702.     this.initPending = this.initPending || new Promise(resolve => {
  703.       GM.xmlHttpRequest({
  704.         url: location.href,
  705.         method: 'HEAD',
  706.         onload: response => {
  707.           this.csp = this._parse(response);
  708.           this.init = this.initPending = null;
  709.           resolve();
  710.         },
  711.       });
  712.     });
  713.   },
  714.  
  715.   async check(url) {
  716.     await this.initPending;
  717.     const isVideo = Util.isVideoUrl(url);
  718.     let mode;
  719.     if (this.csp) {
  720.       const src = this.csp[isVideo ? 'media' : 'img'];
  721.       if (!src.some(this._srcMatches, url))
  722.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  723.     }
  724.     return [mode || ai.xhr, isVideo];
  725.   },
  726.  
  727.   _parse({responseHeaders}) {
  728.     const csp = responseHeaders.match(/(?:^|[\r\n])\s*Content-Security-Policy:([^\r\n]*)/i);
  729.     if (!csp) return;
  730.     const src = {};
  731.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  732.     for (let m; (m = rx.exec(csp[1]));)
  733.       src[m[1]] = m[2].trim().split(/\s+/);
  734.     if (!src.img) src.img = src.default || [];
  735.     if (!src.media) src.media = src.default || [];
  736.     for (const set of [src.img, src.media]) {
  737.       set.forEach((item, i) => {
  738.         if (item !== '*' && item.includes('*')) {
  739.           set[i] = new RegExp(
  740.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  741.             item
  742.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  743.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  744.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  745.             .replace(/[^/]$/, '$&/'));
  746.         }
  747.       });
  748.     }
  749.     return src;
  750.   },
  751.  
  752.   /** @this string */
  753.   _srcMatches(src) {
  754.     return src instanceof RegExp ? src.test(this) :
  755.       src === '*' ||
  756.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  757.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  758.   },
  759. };
  760.  
  761. const Events = {
  762.  
  763.   hoverData: null,
  764.   hoverTimer: 0,
  765.  
  766.   onMouseOver(e) {
  767.     let node = e.target;
  768.     if (!App.isEnabled ||
  769.         e.shiftKey ||
  770.         ai.zoomed ||
  771.         node === ai.popup ||
  772.         node === doc.body ||
  773.         node === doc.documentElement ||
  774.         node === elConfig ||
  775.         ai.gallery && ai.rectHovered)
  776.       return;
  777.     if (node.shadowRoot)
  778.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  779.     // we don't want to process everything in the path of a quickly moving mouse cursor
  780.     Events.hoverData = {e, node, start: now()};
  781.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  782.   },
  783.  
  784.   onMouseOverThrottled(force) {
  785.     if (!Events.hoverData)
  786.       return;
  787.     const {start, e, node} = Events.hoverData;
  788.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  789.     const wait = force ? 0 : start + SETTLE_TIME - now();
  790.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  791.     if (Events.hoverTimer || !Util.isHovered(node))
  792.       return;
  793.     Events.hoverData = null;
  794.     if (!Ruler.rules)
  795.       Ruler.init();
  796.     let a;
  797.     const tag = node.tagName;
  798.     const src = node.currentSrc || node.src;
  799.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  800.     const info =
  801.       // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  802.       tag !== 'A' &&
  803.         RuleMatcher.find(isPic && !src.startsWith('data:') && Util.rel2abs(src), node) ||
  804.       (a = node.closest('A')) &&
  805.         RuleMatcher.findForLink(a) ||
  806.       isPic &&
  807.         {node, rule: {}, url: src};
  808.     if (info && info.url && info.node !== ai.node)
  809.       App.activate(info, e);
  810.   },
  811.  
  812.   onMouseOut(e) {
  813.     if (!e.relatedTarget && !e.shiftKey)
  814.       App.deactivate();
  815.   },
  816.  
  817.   onMouseOutShadow(e) {
  818.     const root = e.target.shadowRoot;
  819.     if (root) {
  820.       root.removeEventListener('mouseover', Events.onMouseOver);
  821.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  822.     }
  823.   },
  824.  
  825.   onMouseMove(e) {
  826.     Events.trackMouse(e);
  827.     if (e.shiftKey)
  828.       return;
  829.     if (!ai.zoomed && !ai.rectHovered) {
  830.       App.deactivate();
  831.     } else if (ai.zoomed) {
  832.       Popup.move();
  833.       const {cx, cy, view: {w, h}} = ai;
  834.       const bx = w / 6;
  835.       const by = h / 6;
  836.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  837.       Status.set(`${onEdge ? '+' : '-'}edge`);
  838.     }
  839.   },
  840.  
  841.   onMouseDown({shiftKey, button}) {
  842.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  843.       ai.controlled = ai.zoomed = true;
  844.     } else if (button === 2 || shiftKey) {
  845.       // Shift = ignore; RMB will be processed in onContext
  846.     } else {
  847.       App.deactivate({wait: true});
  848.       doc.addEventListener('mouseup', App.enable, {once: true});
  849.     }
  850.   },
  851.  
  852.   onMouseScroll(e) {
  853.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  854.     if (ai.zoomed) {
  855.       Events.zoomInOut(dir);
  856.     } else if (ai.gNum > 1 && ai.popup) {
  857.       Gallery.next(-dir);
  858.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  859.       App.toggleZoom();
  860.     } else {
  861.       App.deactivate();
  862.       return;
  863.     }
  864.     dropEvent(e);
  865.   },
  866.  
  867.   onKeyDown(e) {
  868.     // Synthesized events may be of the wrong type and not have a `key`
  869.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  870.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  871.     if (key === '^Control' && !p && (cfg.start !== 'auto' || ai.rule.manual)) {
  872.       dropEvent(e);
  873.       if (Events.hoverData) {
  874.         Events.hoverData.e = e;
  875.         Events.onMouseOverThrottled(true);
  876.       }
  877.       if (ai.node) {
  878.         ai.force = true;
  879.         App.start();
  880.       }
  881.     }
  882.     if (!p)
  883.       return;
  884.     switch (key) {
  885.       case '+Shift':
  886.         if (ai.shiftKeyTime)
  887.           return;
  888.         ai.shiftKeyTime = now();
  889.         Status.set('+shift');
  890.         Bar.show(true);
  891.         if (p.tagName === 'VIDEO')
  892.           p.controls = true;
  893.         return;
  894.       case 'ArrowRight':
  895.       case 'KeyJ':
  896.         Gallery.next(1);
  897.         break;
  898.       case 'ArrowLeft':
  899.       case 'KeyK':
  900.         Gallery.next(-1);
  901.         break;
  902.       case 'KeyD':
  903.         Remoting.saveFile();
  904.         break;
  905.       case 'KeyH': // flip horizontally
  906.       case 'KeyV': // flip vertically
  907.       case 'KeyL': // rotate left
  908.       case 'KeyR': // rotate right
  909.         if (!p)
  910.           return;
  911.         if (key === 'KeyH' || key === 'KeyV') {
  912.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  913.           ai[side] = !ai[side];
  914.         } else {
  915.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  916.         }
  917.         Bar.updateDetails();
  918.         Popup.move();
  919.         break;
  920.       case 'KeyM':
  921.         if (p.tagName === 'VIDEO')
  922.           p.muted = !p.muted;
  923.         break;
  924.       case 'KeyT':
  925.         GM.openInTab(Util.tabFixUrl() || p.src);
  926.         App.deactivate();
  927.         break;
  928.       case 'Minus':
  929.       case 'NumpadSubtract':
  930.         if (ai.zoomed) {
  931.           Events.zoomInOut(-1);
  932.         } else {
  933.           App.toggleZoom();
  934.         }
  935.         break;
  936.       case 'Equal':
  937.       case 'NumpadAdd':
  938.         if (ai.zoomed) {
  939.           Events.zoomInOut(1);
  940.         } else {
  941.           App.toggleZoom();
  942.         }
  943.         break;
  944.       case 'Escape':
  945.         App.deactivate({wait: true});
  946.         break;
  947.       case '!Alt':
  948.         return;
  949.       default:
  950.         App.deactivate({wait: true});
  951.         return;
  952.     }
  953.     dropEvent(e);
  954.   },
  955.  
  956.   onKeyUp(e) {
  957.     if (e.key === 'Shift') {
  958.       Status.set('-shift');
  959.       Bar.hide(true);
  960.       if ((ai.popup || {}).controls)
  961.         ai.popup.controls = false;
  962.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  963.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  964.         ai.controlled = false;
  965.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  966.         App.toggleZoom();
  967.       else
  968.         App.deactivate({wait: true});
  969.       ai.shiftKeyTime = 0;
  970.     }
  971.   },
  972.  
  973.   onContext(e) {
  974.     if (e.shiftKey) return;
  975.     const p = ai.popup;
  976.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  977.       dropEvent(e);
  978.     } else if (!p && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  979.       // right-clicked on an image while the context menu is shown for something else
  980.       if (!ai.node && !Events.hoverData)
  981.         Events.onMouseOver(e);
  982.       Events.onMouseOverThrottled(true);
  983.       if (ai.node) {
  984.         ai.force = true;
  985.         App.start();
  986.         dropEvent(e);
  987.       }
  988.     } else if (p) {
  989.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  990.     }
  991.   },
  992.  
  993.   pierceShadow(node, x, y) {
  994.     for (let root; (root = node.shadowRoot);) {
  995.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  996.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  997.       const inner = root.elementFromPoint(x, y);
  998.       if (!inner || inner === node)
  999.         break;
  1000.       node = inner;
  1001.     }
  1002.     return node;
  1003.   },
  1004.  
  1005.   toggle(enable) {
  1006.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  1007.     const passive = enable ? {passive: true} : undefined;
  1008.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  1009.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  1010.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  1011.     onOff.call(doc, 'keydown', Events.onKeyDown, true); // override normal page listeners
  1012.     onOff.call(doc, 'keyup', Events.onKeyUp);
  1013.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  1014.   },
  1015.  
  1016.   trackMouse(e) {
  1017.     const cx = ai.cx = e.clientX;
  1018.     const cy = ai.cy = e.clientY;
  1019.     const r = ai.rect || (ai.rect = Calc.rect());
  1020.     ai.rectHovered =
  1021.       cx > r.left - 2 && cx < r.right + 2 &&
  1022.       cy > r.top - 2 && cy < r.bottom + 2;
  1023.   },
  1024.  
  1025.   zoomInOut(dir) {
  1026.     const i = Calc.scaleIndex(dir);
  1027.     const n = ai.scales.length;
  1028.     if (i >= 0 && i < n)
  1029.       ai.scale = ai.scales[i];
  1030.     const zo = cfg.zoomOut;
  1031.     if (i <= 0 && zo !== 'stay') {
  1032.       if (ai.scaleFit < ai.scale * .99) {
  1033.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1034.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1035.         App.deactivate({wait: true});
  1036.         return;
  1037.       }
  1038.       ai.zoomed = zo !== 'unzoom';
  1039.     } else {
  1040.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1041.     }
  1042.     if (ai.zooming)
  1043.       ai.popup.classList.add(`${PREFIX}zooming`);
  1044.     Popup.move();
  1045.     Bar.updateDetails();
  1046.   },
  1047. };
  1048.  
  1049. const Gallery = {
  1050.  
  1051.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  1052.  
  1053.   makeParser(g) {
  1054.     return (
  1055.       typeof g === 'function' ? g :
  1056.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  1057.           Gallery.defaultParser
  1058.     );
  1059.   },
  1060.  
  1061.   findIndex(gUrl) {
  1062.     const sel = gUrl.split('#')[1];
  1063.     if (!sel)
  1064.       return 0;
  1065.     if (/^\d+$/.test(sel))
  1066.       return parseInt(sel);
  1067.     for (let i = ai.gNum; i--;) {
  1068.       let {url} = ai.gItems[i];
  1069.       if (Array.isArray(url))
  1070.         url = url[0];
  1071.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1072.         return i;
  1073.     }
  1074.     return 0;
  1075.   },
  1076.  
  1077.   next(dir) {
  1078.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1079.     const item = ai.gItems[ai.gIndex];
  1080.     if (Array.isArray(item.url)) {
  1081.       ai.urls = item.url.slice(1);
  1082.       ai.url = item.url[0];
  1083.     } else {
  1084.       ai.urls = null;
  1085.       ai.url = item.url;
  1086.     }
  1087.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1088.     App.startSingle();
  1089.     Bar.updateName();
  1090.   },
  1091.  
  1092.   nextIndex(dir) {
  1093.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1094.   },
  1095.  
  1096.   defaultParser(text, doc, docUrl, m, rule) {
  1097.     const {g} = rule;
  1098.     const qEntry = g.entry;
  1099.     const qCaption = ensureArray(g.caption);
  1100.     const qImage = g.image || 'img';
  1101.     const qTitle = g.title;
  1102.     const fix =
  1103.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1104.       (s => s.trim());
  1105.     const items = [...$$(qEntry || qImage, doc)]
  1106.       .map(processEntry)
  1107.       .filter(Boolean);
  1108.     items.title = processTitle();
  1109.     items.index =
  1110.       typeof g.index === 'string' &&
  1111.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1112.       RX_HAS_CODE.test(g.index) &&
  1113.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1114.       g.index;
  1115.     return items;
  1116.  
  1117.     function processEntry(entry) {
  1118.       const item = {};
  1119.       try {
  1120.         const img = qEntry ? $(qImage, entry) : entry;
  1121.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1122.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1123.       } catch (e) {}
  1124.       return item.url && item;
  1125.     }
  1126.  
  1127.     function processCaption(selector) {
  1128.       const el = $(selector, this) ||
  1129.                  $orSelf(selector, this.previousElementSibling) ||
  1130.                  $orSelf(selector, this.nextElementSibling);
  1131.       return el && fix(el.textContent);
  1132.     }
  1133.  
  1134.     function processTitle() {
  1135.       const el = $(qTitle, doc);
  1136.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1137.     }
  1138.  
  1139.     function $orSelf(selector, el) {
  1140.       if (el && !el.matches(qEntry))
  1141.         return el.matches(selector) ? el : $(selector, el);
  1142.     }
  1143.   },
  1144. };
  1145.  
  1146. const Popup = {
  1147.  
  1148.   async create(src, pageUrl) {
  1149.     Popup.destroy();
  1150.     ai.imageUrl = src;
  1151.     if (!src)
  1152.       return;
  1153.     const myAi = ai;
  1154.     let [xhr, isVideo] = await CspSniffer.check(src);
  1155.     if (ai !== myAi)
  1156.       return;
  1157.     if (xhr)
  1158.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1159.     if (ai !== myAi || !src)
  1160.       return;
  1161.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1162.     p.id = `${PREFIX}popup`;
  1163.     p.src = src;
  1164.     p.addEventListener('error', App.handleError);
  1165.     if (ai.zooming)
  1166.       p.addEventListener('transitionend', Popup.onZoom);
  1167.     doc.body.insertBefore(p, ai.bar || undefined);
  1168.     await 0;
  1169.     if (App.checkProgress({start: true}) === false)
  1170.       return;
  1171.     if (p.complete)
  1172.       Popup.onLoad.call(ai.popup);
  1173.     else if (!isVideo)
  1174.       p.addEventListener('load', Popup.onLoad, {once: true});
  1175.   },
  1176.  
  1177.   destroy() {
  1178.     const p = ai.popup;
  1179.     if (!p) return;
  1180.     p.removeEventListener('load', Popup.onLoad);
  1181.     p.removeEventListener('error', App.handleError);
  1182.     if (typeof p.pause === 'function')
  1183.       p.pause();
  1184.     if (ai.blobUrl)
  1185.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1186.     p.remove();
  1187.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1188.   },
  1189.  
  1190.   move() {
  1191.     let x, y;
  1192.     const {cx, cy, extras, view} = ai;
  1193.     const vw = view.w - extras.outw;
  1194.     const vh = view.h - extras.outh;
  1195.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1196.     const h0 = ai.scale * ai.nheight + extras.inh;
  1197.     const isSwapped = ai.rotate % 180;
  1198.     const w = isSwapped ? h0 : w0;
  1199.     const h = isSwapped ? w0 : h0;
  1200.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1201.       const r = ai.rect;
  1202.       const rx = (r.left + r.right) / 2;
  1203.       const ry = (r.top + r.bottom) / 2;
  1204.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1205.         if (h < vh - 60)
  1206.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1207.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1208.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1209.         if (w < vw - 60)
  1210.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1211.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1212.       }
  1213.     }
  1214.     if (x == null)
  1215.       x = (vw - w) * (vw > w ? .5 : clamp(5 / 3 * (cx / vw - .2), 0, 1));
  1216.     if (y == null)
  1217.       y = (vh - h) * (vh > h ? .5 : clamp(5 / 3 * (cy / vh - .2), 0, 1));
  1218.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1219.     x += extras.o - diff;
  1220.     y += extras.o + diff;
  1221.     $css(ai.popup, {
  1222.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1223.                  `rotate(${ai.rotate || 0}deg) ` +
  1224.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1225.       width: `${Math.round(w0)}px`,
  1226.       height: `${Math.round(h0)}px`,
  1227.     });
  1228.   },
  1229.  
  1230.   onLoad() {
  1231.     if (this === ai.popup) {
  1232.       this.setAttribute('loaded', '');
  1233.       ai.popupLoaded = true;
  1234.       Status.set('-loading');
  1235.       if (ai.preloadUrl) {
  1236.         $create('img', {src: ai.preloadUrl});
  1237.         ai.preloadUrl = null;
  1238.       }
  1239.     }
  1240.   },
  1241.  
  1242.   onZoom() {
  1243.     this.classList.remove(`${PREFIX}zooming`);
  1244.   },
  1245. };
  1246.  
  1247. const PopupVideo = {
  1248.   async create() {
  1249.     ai.bufBar = false;
  1250.     ai.bufStart = now();
  1251.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1252.     return $create('video', {
  1253.       autoplay: true,
  1254.       controls: shouldMute,
  1255.       muted: shouldMute,
  1256.       loop: true,
  1257.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1258.       onprogress: PopupVideo.progress,
  1259.       oncanplaythrough: PopupVideo.progressDone,
  1260.       onvolumechange: PopupVideo.rememberVolume,
  1261.     });
  1262.   },
  1263.  
  1264.   progress() {
  1265.     const {duration} = this;
  1266.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1267.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1268.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1269.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1270.     }
  1271.   },
  1272.  
  1273.   progressDone() {
  1274.     this.onprogress = this.oncanplaythrough = null;
  1275.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1276.       Bar.set(false);
  1277.     Popup.onLoad.call(this);
  1278.   },
  1279.  
  1280.   rememberVolume() {
  1281.     GM.setValue('volume', this.volume);
  1282.   },
  1283. };
  1284.  
  1285. const Ruler = {
  1286. /*
  1287.  'u' works only with URLs so it's ignored if 'html' is true
  1288.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1289.    |foo = url or text must start with foo
  1290.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1291.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1292.  'r' is checked only if 'u' matches first
  1293. */
  1294.   init() {
  1295.     const errors = new Map();
  1296.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1297.     for (const rule of errors.keys())
  1298.       App.handleError('Invalid custom host rule:', rule);
  1299.  
  1300.     // rules that disable previewing
  1301.     const disablers = [
  1302.       dotDomain.endsWith('.stackoverflow.com') && {
  1303.         e: '.post-tag, .post-tag img',
  1304.         s: '',
  1305.       },
  1306.       {
  1307.         u: '||disqus.com/',
  1308.         s: '',
  1309.       },
  1310.     ];
  1311.  
  1312.     // optimization: a rule is created only when on domain
  1313.     const perDomain = [
  1314.       hostname.includes('startpage') && {
  1315.         r: /\boiu=(.+)/,
  1316.         s: '$1',
  1317.         follow: true,
  1318.       },
  1319.       dotDomain.endsWith('.4chan.org') && {
  1320.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1321.         q: '.op .fileText a',
  1322.         css: '#post-preview{display:none}',
  1323.       },
  1324.       hostname.includes('amazon.') && {
  1325.         r: /.+?images\/I\/.+?\./,
  1326.         s: m => {
  1327.           const uh = doc.getElementById('universal-hover');
  1328.           return uh ? '' : m[0] + 'jpg';
  1329.         },
  1330.         css: '#zoomWindow{display:none!important;}',
  1331.       },
  1332.       dotDomain.endsWith('.bing.com') && {
  1333.         e: 'a[m*="murl"]',
  1334.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1335.         s: '$1',
  1336.         html: true,
  1337.       },
  1338.       ...dotDomain.endsWith('.deviantart.com') && [{
  1339.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1340.         s: (m, node) =>
  1341.           $propUp(node, 'data-super-full-img') ||
  1342.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1343.           node.dataset.embedId && node.src,
  1344.       }, {
  1345.         e: '.dev-view-deviation img',
  1346.         s: () => [
  1347.           $('.dev-page-download').href,
  1348.           $('.dev-content-full').src,
  1349.         ].filter(Boolean),
  1350.       }, {
  1351.         e: 'a[data-hook=deviation_link]',
  1352.         q: 'link[as=image]',
  1353.       }] || [],
  1354.       dotDomain.endsWith('.dropbox.com') && {
  1355.         r: /(.+?&size_mode)=\d+(.*)/,
  1356.         s: '$1=5$2',
  1357.       },
  1358.       dotDomain.endsWith('.facebook.com') && {
  1359.         e: 'a[href*="ref=hovercard"]',
  1360.         s: (m, node) =>
  1361.           'https://www.facebook.com/photo.php?fbid=' +
  1362.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1363.         follow: true,
  1364.       },
  1365.       dotDomain.endsWith('.facebook.com') && {
  1366.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1367.         s: (m, node) =>
  1368.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1369.             decodeURIComponent(m[4]),
  1370.         html: true,
  1371.         follow: true,
  1372.       },
  1373.       dotDomain.endsWith('.flickr.com') &&
  1374.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1375.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1376.         s: m => `https://www.flickr.com/services/rest/?${
  1377.           new URLSearchParams({
  1378.             photo_id: m[1],
  1379.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1380.             method: 'flickr.photos.getSizes',
  1381.             format: 'json',
  1382.             nojsoncallback: 1,
  1383.           }).toString()}`,
  1384.         q: text => JSON.parse(text).sizes.size.pop().source,
  1385.       },
  1386.       dotDomain.endsWith('.github.com') && {
  1387.         r: new RegExp([
  1388.           /(avatars.+?&s=)\d+/,
  1389.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1390.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1391.         ].map(rx => rx.source).join('|')),
  1392.         s: m => `https://${
  1393.           m[1] ? `${m[1]}460` :
  1394.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1395.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1396.         }`,
  1397.       },
  1398.       isGoogleImages && {
  1399.         e: 'a[href*="imgres?imgurl="] img',
  1400.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1401.         follow: true,
  1402.       },
  1403.       isGoogleImages && {
  1404.         e: '[data-tbnid] a:not([href])',
  1405.         s: (m, a) => {
  1406.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1407.           new MutationObserver((_, mo) => {
  1408.             mo.disconnect();
  1409.             App.isEnabled = true;
  1410.             a.alt = a2.innerText;
  1411.             const {left, top} = a.getBoundingClientRect();
  1412.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1413.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1414.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1415.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1416.         },
  1417.       },
  1418.       dotDomain.endsWith('.instagram.com') && {
  1419.         e: [
  1420.           'a[href*="/p/"]',
  1421.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1422.         ],
  1423.         s: (m, node, rule) => {
  1424.           let data, a, n, img, src;
  1425.           if (location.pathname.startsWith('/p/')) {
  1426.             img = $('img[srcset], video', node.parentNode);
  1427.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1428.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1429.           }
  1430.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1431.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1432.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1433.           }
  1434.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1435.           Ruler.toggle(rule, 'g', a && /<\w+[^>]+carousel/i.test(a.innerHTML));
  1436.           rule.follow = !data && !rule.g;
  1437.           rule._data = data;
  1438.           rule._img = img;
  1439.           return (
  1440.             !a && !src ? false :
  1441.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1442.                 data.video_url || data.display_url);
  1443.         },
  1444.         c: (html, doc, node, rule) =>
  1445.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1446.         follow: true,
  1447.         _q: 'meta[property="og:video"]',
  1448.         _g(text, doc, url, m, rule) {
  1449.           const media = JSON.parse(text).graphql.shortcode_media;
  1450.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1451.             url: e.node.video_url || e.node.display_url,
  1452.           }));
  1453.           items.title = tryCatch(rule._getCaption, media) || '';
  1454.           return items;
  1455.         },
  1456.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1457.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1458.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1459.       },
  1460.       ...dotDomain.endsWith('.reddit.com') && [{
  1461.         u: '||i.reddituploads.com/',
  1462.       }, {
  1463.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1464.         s: (m, node) => $propUp(node, 'data-url'),
  1465.       }, {
  1466.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1467.         s: 'https://i$1',
  1468.       }] || [],
  1469.       dotDomain.endsWith('.tumblr.com') && {
  1470.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1471.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1472.         follow: true,
  1473.       },
  1474.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1475.         e: 'a.media-item, a.js-media-image-link',
  1476.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1477.         follow: true,
  1478.       },
  1479.       dotDomain.endsWith('.twitter.com') && {
  1480.         e: '.grid-tweet > .media-overlay',
  1481.         s: (m, node) => node.previousElementSibling.src,
  1482.         follow: true,
  1483.       },
  1484.     ];
  1485.  
  1486.     const main = [
  1487.       {
  1488.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1489.         s: '$1',
  1490.         follow: true,
  1491.         onerror: 'skip',
  1492.       },
  1493.       {
  1494.         u: [
  1495.           '||500px.com/photo/',
  1496.           '||cl.ly/',
  1497.           '||cweb-pix.com/',
  1498.           '||ibb.co/',
  1499.           '||imgcredit.xyz/image/',
  1500.         ],
  1501.         r: /\.\w+\/.+/,
  1502.         q: 'meta[property="og:image"]',
  1503.       },
  1504.       {
  1505.         u: 'attachment.php',
  1506.         r: /attachment\.php.+attachmentid/,
  1507.       },
  1508.       {
  1509.         u: '||abload.de/image',
  1510.         q: '#image',
  1511.       },
  1512.       {
  1513.         u: '||deviantart.com/art/',
  1514.         s: (m, node) =>
  1515.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1516.             '' :
  1517.             m.input,
  1518.         q: [
  1519.           '#download-button[href*=".jpg"]',
  1520.           '#download-button[href*=".jpeg"]',
  1521.           '#download-button[href*=".gif"]',
  1522.           '#download-button[href*=".png"]',
  1523.           '#gmi-ResViewSizer_fullimg',
  1524.           'img.dev-content-full',
  1525.         ],
  1526.       },
  1527.       {
  1528.         u: '||dropbox.com/s',
  1529.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1530.         q: (text, doc) =>
  1531.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1532.       },
  1533.       {
  1534.         r: /[./]ebay\.[^/]+\/itm\//,
  1535.         q: text =>
  1536.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1537.             .replace(/~~60_\d+/, '~~60_57'),
  1538.       },
  1539.       {
  1540.         u: '||i.ebayimg.com/',
  1541.         s: (m, node) =>
  1542.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1543.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1544.       },
  1545.       {
  1546.         u: '||fastpic.ru',
  1547.         e: 'a',
  1548.         q: 'img[src*="/big/"]',
  1549.         xhr: true,
  1550.       },
  1551.       {
  1552.         u: '||facebook.com/',
  1553.         r: /photo\.php|[^/]+\/photos\//,
  1554.         s: (m, node) =>
  1555.           node.id === 'fbPhotoImage' ? false :
  1556.             /gradient\.png$/.test(m.input) ? '' :
  1557.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1558.         q: [
  1559.           'div + span > a:first-child:not([href*="tag_faces"])',
  1560.           'div + span > a[href*="tag_faces"] ~ a',
  1561.         ],
  1562.         rect: '#fbProfileCover',
  1563.       },
  1564.       {
  1565.         u: '||fbcdn.',
  1566.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1567.         s: m =>
  1568.           dotDomain.endsWith('.facebook.com') &&
  1569.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1570.           false,
  1571.         manual: true,
  1572.       },
  1573.       {
  1574.         u: ['||fbcdn-', 'fbcdn.net/'],
  1575.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1576.         s: (m, node) => {
  1577.           if (node.id === 'fbPhotoImage') {
  1578.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1579.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1580.           }
  1581.           if (m[4])
  1582.             return false;
  1583.           const pn = node.parentNode;
  1584.           if (pn.outerHTML.includes('/hovercard/'))
  1585.             return '';
  1586.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1587.             return false;
  1588.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1589.         },
  1590.         rect: '.photoWrap',
  1591.       },
  1592.       {
  1593.         u: '||flickr.com/photos/',
  1594.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1595.         s: m =>
  1596.           m.input.indexOf('/sizes/') < 0 ?
  1597.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1598.             false,
  1599.         q: (text, doc) => {
  1600.           const links = $$('.sizes-list a', doc);
  1601.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1602.         },
  1603.         follow: true,
  1604.       },
  1605.       {
  1606.         u: '||flickr.com/photos/',
  1607.         r: /\/sizes\//,
  1608.         q: '#allsizes-photo > img',
  1609.       },
  1610.       {
  1611.         u: '||gfycat.com/',
  1612.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1613.         s: 'https://$1$3',
  1614.         q: [
  1615.           'meta[content$=".webm"]',
  1616.           '#webmsource',
  1617.           'source[src$=".webm"]',
  1618.         ],
  1619.       },
  1620.       {
  1621.         u: [
  1622.           '||googleusercontent.com/proxy',
  1623.           '||googleusercontent.com/gadgets/proxy',
  1624.         ],
  1625.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1626.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1627.       },
  1628.       {
  1629.         u: [
  1630.           '||googleusercontent.com/',
  1631.           '||ggpht.com/',
  1632.         ],
  1633.         s: m => m.input.includes('webcache.') ? '' :
  1634.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1635.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1636.       },
  1637.       {
  1638.         u: '||gravatar.com/',
  1639.         r: /([a-z0-9]{32})/,
  1640.         s: 'https://gravatar.com/avatar/$1?s=200',
  1641.       },
  1642.       {
  1643.         u: '//gyazo.com/',
  1644.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1645.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1646.         _q: 'meta[name="twitter:image"]',
  1647.       },
  1648.       {
  1649.         u: '||hostingkartinok.com/show-image.php',
  1650.         q: '.image img',
  1651.       },
  1652.       {
  1653.         u: [
  1654.           '||imagecurl.com/images/',
  1655.           '||imagecurl.com/viewer.php',
  1656.         ],
  1657.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1658.         s: 'https://imagecurl.com/images/$1$2$3',
  1659.       },
  1660.       {
  1661.         u: '||imagebam.com/image/',
  1662.         q: 'meta[property="og:image"]',
  1663.         tabfix: true,
  1664.         xhr: hostname.includes('planetsuzy'),
  1665.       },
  1666.       {
  1667.         u: '||imageban.ru/thumbs',
  1668.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1669.         s: '$1out$2/$3/$4',
  1670.       },
  1671.       {
  1672.         u: [
  1673.           '||imageban.ru/show',
  1674.           '||imageban.net/show',
  1675.           '||ibn.im/',
  1676.         ],
  1677.         q: '#img_main',
  1678.       },
  1679.       {
  1680.         u: '||imageshack.us/img',
  1681.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1682.         s: 'https://$2/download/$1/$3$4',
  1683.       },
  1684.       {
  1685.         u: '||imageshack.us/i/',
  1686.         q: '#share-dl',
  1687.       },
  1688.       {
  1689.         u: '||imageteam.org/img',
  1690.         q: 'img[alt="image"]',
  1691.       },
  1692.       {
  1693.         u: [
  1694.           '||imagetwist.com/',
  1695.           '||imageshimage.com/',
  1696.         ],
  1697.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1698.         q: 'img.pic',
  1699.         xhr: true,
  1700.       },
  1701.       {
  1702.         u: '||imageupper.com/i/',
  1703.         q: '#img',
  1704.         xhr: true,
  1705.       },
  1706.       {
  1707.         u: '||imagevenue.com/',
  1708.         q: 'a[data-toggle="full"] img',
  1709.       },
  1710.       {
  1711.         u: '||imagezilla.net/show/',
  1712.         q: '#photo',
  1713.         xhr: true,
  1714.       },
  1715.       {
  1716.         u: [
  1717.           '||images-na.ssl-images-amazon.com/images/',
  1718.           '||media-imdb.com/images/',
  1719.         ],
  1720.         r: /images\/.+?\.jpg/,
  1721.         s: '/V1\\.?_.+?\\.//g',
  1722.       },
  1723.       {
  1724.         u: '||imgbox.com/',
  1725.         r: /\.com\/([a-z0-9]+)$/i,
  1726.         q: '#img',
  1727.         xhr: hostname !== 'imgbox.com',
  1728.       },
  1729.       {
  1730.         u: '||imgclick.net/',
  1731.         r: /\.net\/(\w+)/,
  1732.         q: 'img.pic',
  1733.         xhr: true,
  1734.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1735.       },
  1736.       {
  1737.         u: '.imgcredit.xyz/',
  1738.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1739.         s: ['https$1$2', 'https$1.png'],
  1740.       },
  1741.       {
  1742.         u: [
  1743.           '||imgflip.com/i/',
  1744.           '||imgflip.com/gif/',
  1745.         ],
  1746.         r: /\/(i|gif)\/([^/?#]+)/,
  1747.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1748.       },
  1749.       {
  1750.         u: [
  1751.           '||imgur.com/a/',
  1752.           '||imgur.com/gallery/',
  1753.         ],
  1754.         g: async (text, doc, url, m, rule, node, cb) => {
  1755.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1756.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1757.           const images = ((info || 0).data || 0).images;
  1758.           const items = [];
  1759.           for (const img of images || []) {
  1760.             u = `https://i.imgur.com/${img.hash}`;
  1761.             items.push({
  1762.               url: img.ext === '.gif' && img.animated !== false ?
  1763.                 [`${u}.webm`, `${u}.mp4`, u] :
  1764.                 u + img.ext,
  1765.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1766.             });
  1767.           }
  1768.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1769.             items.title = info.title;
  1770.           cb(items);
  1771.         },
  1772.         css: '.post > .hover { display:none!important; }',
  1773.       },
  1774.       {
  1775.         u: '||imgur.com/',
  1776.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1777.         s: 'gallery',
  1778.         g: (text, doc, url, m) =>
  1779.           m[2].split(',').map(id => ({
  1780.             url: `https://i.${m[1]}${id}.jpg`,
  1781.           })),
  1782.       },
  1783.       {
  1784.         u: '||imgur.com/',
  1785.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1786.         s: (m, node) => {
  1787.           if (/memegen|random|register|search|signin/.test(m.input))
  1788.             return '';
  1789.           const a = node.closest('a');
  1790.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1791.             return false;
  1792.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1793.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1794.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1795.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1796.           return ext === 'webm' ?
  1797.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1798.             u + ext;
  1799.         },
  1800.       },
  1801.       {
  1802.         u: [
  1803.           '||instagr.am/p/',
  1804.           '||instagram.com/p/',
  1805.         ],
  1806.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1807.         q: text => {
  1808.           const m = JSON.parse(text).graphql.shortcode_media;
  1809.           return m.video_url || m.display_url;
  1810.         },
  1811.         rect: 'div.PhotoGridMediaItem',
  1812.         c: text => {
  1813.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1814.           return m === undefined ? '(no caption)' : m.node.text;
  1815.         },
  1816.       },
  1817.       {
  1818.         u: [
  1819.           '||livememe.com/',
  1820.           '||lvme.me/',
  1821.         ],
  1822.         r: /\.\w+\/([^.]+)$/,
  1823.         s: 'http://i.lvme.me/$1.jpg',
  1824.       },
  1825.       {
  1826.         u: '||lostpic.net/image',
  1827.         q: '.image-viewer-image img',
  1828.       },
  1829.       {
  1830.         u: '||makeameme.org/meme/',
  1831.         r: /\/meme\/([^/?#]+)/,
  1832.         s: 'https://media.makeameme.org/created/$1.jpg',
  1833.       },
  1834.       {
  1835.         u: '||photobucket.com/',
  1836.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1837.         s: 'https://i$1$3',
  1838.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1839.       },
  1840.       {
  1841.         u: '||piccy.info/view3/',
  1842.         r: /(.+?\/view3)\/(.*)\//,
  1843.         s: '$1/$2/orig/',
  1844.         q: '#mainim',
  1845.       },
  1846.       {
  1847.         u: '||pimpandhost.com/image/',
  1848.         r: /(.+?\/image\/[0-9]+)/,
  1849.         s: '$1?size=original',
  1850.         q: 'img.original',
  1851.       },
  1852.       {
  1853.         u: [
  1854.           '||pixroute.com/',
  1855.           '||imgspice.com/',
  1856.         ],
  1857.         r: /\.html$/,
  1858.         q: 'img[id]',
  1859.         xhr: true,
  1860.       },
  1861.       {
  1862.         u: '||postima',
  1863.         r: /postima?ge?\.org\/image\/\w+/,
  1864.         q: [
  1865.           'a[href*="dl="]',
  1866.           '#main-image',
  1867.         ],
  1868.       },
  1869.       {
  1870.         u: [
  1871.           '||prntscr.com/',
  1872.           '||prnt.sc/',
  1873.         ],
  1874.         r: /\.\w+\/.+/,
  1875.         q: 'meta[property="og:image"]',
  1876.         xhr: true,
  1877.       },
  1878.       {
  1879.         u: '||radikal.ru/',
  1880.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1881.         s: (m, node, rule) =>
  1882.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1883.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1884.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1885.       },
  1886.       {
  1887.         u: '||tumblr.com',
  1888.         r: /_500\.jpg/,
  1889.         s: ['/_500/_1280/', ''],
  1890.       },
  1891.       {
  1892.         u: '||twimg.com/',
  1893.         r: /\/profile_images/i,
  1894.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1895.       },
  1896.       {
  1897.         u: '||twimg.com/media/',
  1898.         r: /.+?format=(jpe?g|png|gif)/i,
  1899.         s: '$0&name=orig',
  1900.       },
  1901.       {
  1902.         u: '||twimg.com/1/proxy',
  1903.         r: /t=([^&_]+)/i,
  1904.         s: m => atob(m[1]).match(/http.+/),
  1905.       },
  1906.       {
  1907.         u: '||pic.twitter.com/',
  1908.         r: /\.com\/[a-z0-9]+/i,
  1909.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1910.         follow: true,
  1911.       },
  1912.       {
  1913.         u: '||twitpic.com/',
  1914.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1915.         s: 'https://twitpic.com/show/large/$2',
  1916.       },
  1917.       {
  1918.         u: '||wiki',
  1919.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1920.         s: '/\\/thumb(?=\\/)|' +
  1921.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1922.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1923.         xhr: !hostname.includes('wiki'),
  1924.       },
  1925.       {
  1926.         u: '||ytimg.com/vi/',
  1927.         r: /(.+?\/vi\/[^/]+)/,
  1928.         s: '$1/0.jpg',
  1929.         rect: '.video-list-item',
  1930.       },
  1931.       {
  1932.         u: '/viewer.php?file=',
  1933.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1934.         s: '$1/images/$2',
  1935.         xhr: true,
  1936.       },
  1937.       {
  1938.         u: '/thumb_',
  1939.         r: /\/albums.+\/thumb_[^/]/,
  1940.         s: '/thumb_//',
  1941.       },
  1942.       {
  1943.         u: [
  1944.           '.th.jp',
  1945.           '.th.gif',
  1946.           '.th.png',
  1947.         ],
  1948.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1949.         s: '$1$2',
  1950.         follow: true,
  1951.       },
  1952.       {
  1953.         r: RX_MEDIA_URL,
  1954.       },
  1955.     ];
  1956.  
  1957.     /** @type mpiv.HostRule[] */
  1958.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1959.   },
  1960.  
  1961.   format(rule, {expand} = {}) {
  1962.     const s = Util.stringify(rule, null, ' ');
  1963.     return expand ?
  1964.       /* {"a": ...,
  1965.           "b": ...,
  1966.           "c": ...
  1967.          } */
  1968.       s.replace(/^{\s+/g, '{') :
  1969.       /* {"a": ..., "b": ..., "c": ...} */
  1970.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1971.   },
  1972.  
  1973.   fromElement(el) {
  1974.     const text = el.textContent.trim();
  1975.     if (text.startsWith('{') &&
  1976.         text.endsWith('}') &&
  1977.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  1978.       const rule = tryCatch(JSON.parse, text);
  1979.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  1980.     }
  1981.   },
  1982.  
  1983.   /** @returns mpiv.HostRule | Error | false | undefined */
  1984.   parse(rule) {
  1985.     const isBatchOp = this instanceof Map;
  1986.     try {
  1987.       if (typeof rule === 'string')
  1988.         rule = JSON.parse(rule);
  1989.       if ('d' in rule && typeof rule.d !== 'string')
  1990.         rule.d = undefined;
  1991.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1992.         return false;
  1993.       const compileTo = isBatchOp ? rule : {};
  1994.       if (rule.r)
  1995.         compileTo.r = new RegExp(rule.r, 'i');
  1996.       if (RX_HAS_CODE.test(rule.s))
  1997.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1998.       if (RX_HAS_CODE.test(rule.q))
  1999.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  2000.       if (RX_HAS_CODE.test(rule.c))
  2001.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  2002.       return rule;
  2003.     } catch (e) {
  2004.       if (!e.message.includes('unsafe-eval'))
  2005.         if (isBatchOp) {
  2006.           this.set(rule, e);
  2007.         } else {
  2008.           return e;
  2009.         }
  2010.     }
  2011.   },
  2012.  
  2013.   runC(text, doc = document) {
  2014.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2015.     ai.caption = fn(text, doc);
  2016.   },
  2017.  
  2018.   runCHandler: {
  2019.     function: (text, doc) =>
  2020.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2021.     string: (text, doc) => {
  2022.       const el = $many(ai.rule.c, doc);
  2023.       return !el ? '' :
  2024.         el.getAttribute('content') ||
  2025.         el.getAttribute('title') ||
  2026.         el.textContent;
  2027.     },
  2028.     default: () =>
  2029.       (ai.tooltip || 0).text ||
  2030.       ai.node.alt ||
  2031.       $propUp(ai.node, 'title') ||
  2032.       Remoting.getFileName(
  2033.         ai.node.tagName === (ai.popup || 0).tagName
  2034.           ? ai.url
  2035.           : ai.node.src || $propUp(ai.node, 'href')),
  2036.   },
  2037.  
  2038.   runQ(text, doc, docUrl) {
  2039.     let url;
  2040.     if (typeof ai.rule.q === 'function') {
  2041.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2042.       if (Array.isArray(url)) {
  2043.         ai.urls = url.slice(1);
  2044.         url = url[0];
  2045.       }
  2046.     } else {
  2047.       const el = $many(ai.rule.q, doc);
  2048.       url = Remoting.findImageUrl(el, docUrl);
  2049.     }
  2050.     return url;
  2051.   },
  2052.  
  2053.   /** @returns {?Array} if falsy then the rule should be skipped */
  2054.   runS(node, rule, m) {
  2055.     let urls = [];
  2056.     for (const s of ensureArray(rule.s))
  2057.       urls.push(
  2058.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2059.           typeof s === 'function' ? s(m, node, rule) :
  2060.             s);
  2061.     if (rule.q && urls.length > 1) {
  2062.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2063.       return;
  2064.     }
  2065.     if (Array.isArray(urls[0]))
  2066.       urls = urls[0];
  2067.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2068.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2069.   },
  2070.  
  2071.   substituteSingle(s, m) {
  2072.     if (!m) return s;
  2073.     if (s.startsWith('/') && !s.startsWith('//')) {
  2074.       const mid = s.search(/[^\\]\//) + 1;
  2075.       const end = s.lastIndexOf('/');
  2076.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2077.       return m.input.replace(re, s.slice(mid + 1, end));
  2078.     }
  2079.     if (m.length && s.includes('$')) {
  2080.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2081.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2082.         for (let i = maxLength; i >= 0; i--) {
  2083.           const part = num.slice(0, i) | 0;
  2084.           if (part < m.length)
  2085.             return (m[part] || '') + num.slice(i);
  2086.         }
  2087.         return text;
  2088.       });
  2089.     }
  2090.     return s;
  2091.   },
  2092.  
  2093.   toggle(rule, prop, condition) {
  2094.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2095.     return condition;
  2096.   },
  2097. };
  2098.  
  2099. const RuleMatcher = {
  2100.  
  2101.   /** @returns ?mpiv.RuleMatchInfo */
  2102.   findForLink(a) {
  2103.     let url =
  2104.       a.getAttribute('data-expanded-url') ||
  2105.       a.getAttribute('data-full-url') ||
  2106.       a.getAttribute('data-url') ||
  2107.       a.href;
  2108.     if (url.startsWith('data:'))
  2109.       url = false;
  2110.     else if (url.includes('//t.co/'))
  2111.       url = 'http://' + a.textContent;
  2112.     return RuleMatcher.find(url, a);
  2113.   },
  2114.  
  2115.   /** @returns ?mpiv.RuleMatchInfo */
  2116.   find(url, node, {noHtml, skipRules} = {}) {
  2117.     const tn = node.tagName;
  2118.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2119.     const isPicOrLink = isPic || tn === 'A';
  2120.     let m, html;
  2121.     for (const rule of Ruler.rules) {
  2122.       const u = rule[SYM_U] || rule.u && (rule[SYM_U] = UrlMatcher(rule.u));
  2123.       if (u && (!url || !u.fn.call(u.data, url)) ||
  2124.           rule.e && !node.matches(rule.e) ||
  2125.           skipRules && skipRules.includes(rule))
  2126.         continue;
  2127.       if (rule.r)
  2128.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2129.           ? rule.r.exec(html || (html = node.outerHTML))
  2130.           : url && rule.r.exec(url);
  2131.       else if (url)
  2132.         m = Object.assign([url], {index: 0, input: url});
  2133.       else
  2134.         m = [];
  2135.       if (!m)
  2136.         continue;
  2137.       if (rule.s === '')
  2138.         return {};
  2139.       let hasS = rule.s != null;
  2140.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2141.       // but we'll only allow it to match rules without 's' in the nested find call
  2142.       if (isPic && !hasS && !skipRules)
  2143.         continue;
  2144.       hasS &= rule.s !== 'gallery';
  2145.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2146.       if (urls)
  2147.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2148.     }
  2149.   },
  2150.  
  2151.   /** @returns ?mpiv.RuleMatchInfo */
  2152.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2153.     let info;
  2154.     let url = `${urls[0]}`;
  2155.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2156.     if (url)
  2157.       url = Util.rel2abs(url);
  2158.     else
  2159.       info = {};
  2160.     if (follow)
  2161.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2162.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2163.       const xhr = cfg.xhr && rule.xhr;
  2164.       info = {
  2165.         match,
  2166.         node,
  2167.         rule,
  2168.         url,
  2169.         urls: urls.length > 1 ? urls.slice(1) : null,
  2170.         gallery: rule.g && Gallery.makeParser(rule.g),
  2171.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2172.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2173.       };
  2174.     }
  2175.     return info;
  2176.   },
  2177.  
  2178.   isFollowableUrl(url, rule) {
  2179.     const f = rule.follow;
  2180.     return typeof f === 'function' ? f(url) : f;
  2181.   },
  2182. };
  2183.  
  2184. const Remoting = {
  2185.  
  2186.   gmXhr(url, opts = {}) {
  2187.     if (ai.req)
  2188.       tryCatch.call(ai.req, ai.req.abort);
  2189.     return new Promise((resolve, reject) => {
  2190.       const {anonymous} = ai.rule || {};
  2191.       ai.req = GM.xmlHttpRequest({
  2192.         url,
  2193.         anonymous,
  2194.         withCredentials: !anonymous,
  2195.         method: 'GET',
  2196.         timeout: 30e3,
  2197.         ...opts,
  2198.         onload: done,
  2199.         onerror: done,
  2200.         ontimeout() {
  2201.           ai.req = null;
  2202.           reject(`Timeout fetching ${url}`);
  2203.         },
  2204.       });
  2205.       function done(r) {
  2206.         ai.req = null;
  2207.         if (r.status < 400 && !r.error)
  2208.           resolve(r);
  2209.         else
  2210.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2211.       }
  2212.     });
  2213.   },
  2214.  
  2215.   async getDoc(url) {
  2216.     if (!url) {
  2217.       // current document
  2218.       return {
  2219.         doc,
  2220.         finalUrl: location.href,
  2221.         responseText: doc.documentElement.outerHTML,
  2222.       };
  2223.     }
  2224.     const r = await (!ai.post ?
  2225.       Remoting.gmXhr(url) :
  2226.       Remoting.gmXhr(url, {
  2227.         method: 'POST',
  2228.         data: ai.post,
  2229.         headers: {
  2230.           'Content-Type': 'application/x-www-form-urlencoded',
  2231.           'Referer': url,
  2232.         },
  2233.       }));
  2234.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2235.     return r;
  2236.   },
  2237.  
  2238.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2239.     ai.bufBar = false;
  2240.     ai.bufStart = now();
  2241.     const response = await Remoting.gmXhr(url, {
  2242.       responseType: 'blob',
  2243.       headers: {
  2244.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2245.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2246.       },
  2247.       onprogress: Remoting.getImageProgress,
  2248.     });
  2249.     Bar.set(false);
  2250.     const type = Remoting.guessMimeType(response);
  2251.     let b = response.response;
  2252.     if (!b) throw 'Empty response';
  2253.     if (b.type !== type)
  2254.       b = b.slice(0, b.size, type);
  2255.     const res = xhr === 'blob'
  2256.       ? (ai.blobUrl = URL.createObjectURL(b))
  2257.       : await Remoting.blobToDataUrl(b);
  2258.     return [res, type.startsWith('video')];
  2259.   },
  2260.  
  2261.   getImageProgress(e) {
  2262.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2263.       ai.bufBar = true;
  2264.     if (ai.bufBar) {
  2265.       const pct = e.loaded / e.total * 100 | 0;
  2266.       const size = e.total / 1024 | 0;
  2267.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2268.     }
  2269.   },
  2270.  
  2271.   async findRedirect() {
  2272.     try {
  2273.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2274.         method: 'HEAD',
  2275.         headers: {
  2276.           'Referer': location.href.split('#', 1)[0],
  2277.         },
  2278.       });
  2279.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2280.       if (!info || !info.url)
  2281.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2282.       Object.assign(ai, info);
  2283.       App.startSingle();
  2284.     } catch (e) {
  2285.       App.handleError(e);
  2286.     }
  2287.   },
  2288.  
  2289.   async saveFile() {
  2290.     const url = ai.popup.src || ai.popup.currentSrc;
  2291.     let name = Remoting.getFileName(ai.imageUrl || url);
  2292.     if (!name.includes('.'))
  2293.       name += '.jpg';
  2294.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2295.       $create('a', {href: url, download: name})
  2296.         .dispatchEvent(new MouseEvent('click'));
  2297.     } else {
  2298.       Status.set('+loading');
  2299.       const onload = () => Status.set('-loading');
  2300.       const gmDL = typeof GM_download === 'function';
  2301.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2302.         url,
  2303.         name,
  2304.         headers: {Referer: url},
  2305.         method: 'get', // polyfilling GM_download
  2306.         responseType: 'blob', // polyfilling GM_download
  2307.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2308.         onerror: e => {
  2309.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2310.           onload();
  2311.         },
  2312.         onprogress: Remoting.getImageProgress,
  2313.         onload({response}) {
  2314.           onload();
  2315.           if (!gmDL) { // polyfilling GM_download
  2316.             const a = Object.assign(document.createElement('a'), {
  2317.               href: URL.createObjectURL(response),
  2318.               download: name,
  2319.             });
  2320.             a.dispatchEvent(new MouseEvent('click'));
  2321.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2322.           }
  2323.         },
  2324.       });
  2325.     }
  2326.   },
  2327.  
  2328.   getFileName(url) {
  2329.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2330.   },
  2331.  
  2332.   blobToDataUrl(blob) {
  2333.     return new Promise((resolve, reject) => {
  2334.       const fr = new FileReader();
  2335.       fr.onload = () => resolve(fr.result);
  2336.       fr.onerror = reject;
  2337.       fr.readAsDataURL(blob);
  2338.     });
  2339.   },
  2340.  
  2341.   guessMimeType({responseHeaders, finalUrl}) {
  2342.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2343.         !RegExp.$1.includes('text/plain'))
  2344.       return RegExp.$1;
  2345.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2346.     switch (ext.toLowerCase()) {
  2347.       case 'bmp': return 'image/bmp';
  2348.       case 'gif': return 'image/gif';
  2349.       case 'jpe': return 'image/jpeg';
  2350.       case 'jpeg': return 'image/jpeg';
  2351.       case 'jpg': return 'image/jpeg';
  2352.       case 'mp4': return 'video/mp4';
  2353.       case 'png': return 'image/png';
  2354.       case 'svg': return 'image/svg+xml';
  2355.       case 'tif': return 'image/tiff';
  2356.       case 'tiff': return 'image/tiff';
  2357.       case 'webm': return 'video/webm';
  2358.       default: return 'application/octet-stream';
  2359.     }
  2360.   },
  2361.  
  2362.   findImageUrl(n, url) {
  2363.     if (!n) return;
  2364.     let html;
  2365.     const path =
  2366.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2367.       n.getAttribute('src') ||
  2368.       n.getAttribute('data-m4v') ||
  2369.       n.getAttribute('href') ||
  2370.       n.getAttribute('content') ||
  2371.       (html = n.outerHTML).includes('http') &&
  2372.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2373.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2374.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2375.   },
  2376. };
  2377.  
  2378. const Status = {
  2379.  
  2380.   set(status) {
  2381.     if (!status && !cfg.globalStatus) {
  2382.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2383.       return;
  2384.     }
  2385.     const prefix = cfg.globalStatus ? PREFIX : '';
  2386.     const action = status && /^[+-]/.test(status) && status[0];
  2387.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2388.     const el = cfg.globalStatus ? doc.documentElement :
  2389.       name === 'edge' ? ai.popup :
  2390.         ai.node;
  2391.     if (!el) return;
  2392.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2393.     const oldValue = (el.getAttribute(attr) || '').trim();
  2394.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2395.     switch (action) {
  2396.       case '-':
  2397.         cls.delete(name);
  2398.         break;
  2399.       case false:
  2400.         for (const c of cls)
  2401.           if (c.startsWith(prefix) && c !== name)
  2402.             cls.delete(c);
  2403.       // fallthrough to +
  2404.       case '+':
  2405.         if (name)
  2406.           cls.add(name);
  2407.         break;
  2408.     }
  2409.     const newValue = [...cls].join(' ');
  2410.     if (newValue !== oldValue)
  2411.       el.setAttribute(attr, newValue);
  2412.   },
  2413.  
  2414.   loading(force) {
  2415.     if (!force) {
  2416.       clearTimeout(ai.timerStatus);
  2417.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2418.     } else if (!ai.popupLoaded) {
  2419.       Status.set('+loading');
  2420.     }
  2421.   },
  2422. };
  2423.  
  2424. const UrlMatcher = (() => {
  2425.   // string-to-regexp escaped chars
  2426.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2427.   // rx for '^' symbol in simple url match
  2428.   const RX_SEP = /[^\w%._-]/y;
  2429.   const RXS_SEP = RX_SEP.source;
  2430.   return match => {
  2431.     const results = [];
  2432.     for (const s of ensureArray(match)) {
  2433.       const pinDomain = s.startsWith('||');
  2434.       const pinStart = !pinDomain && s.startsWith('|');
  2435.       const endSep = s.endsWith('^');
  2436.       let fn;
  2437.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2438.       if (needle.includes('^')) {
  2439.         let plain = '';
  2440.         for (const part of needle.split('^'))
  2441.           if (part.length > plain.length)
  2442.             plain = part;
  2443.         const rx = new RegExp(
  2444.           (pinStart ? '^' : '') +
  2445.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2446.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2447.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2448.         needle = [plain, rx];
  2449.         fn = regexp;
  2450.       } else if (pinStart) {
  2451.         fn = endSep ? equals : starts;
  2452.       } else if (pinDomain) {
  2453.         const slashPos = needle.indexOf('/');
  2454.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2455.         needle = [needle, domain, slashPos > 0, endSep];
  2456.         fn = startsDomainPrescreen;
  2457.       } else if (endSep) {
  2458.         fn = ends;
  2459.       } else {
  2460.         fn = has;
  2461.       }
  2462.       results.push({fn, data: needle});
  2463.     }
  2464.     return results.length > 1 ?
  2465.       {fn: checkArray, data: results} :
  2466.       results[0];
  2467.   };
  2468.   function checkArray(s) {
  2469.     return this.some(checkArrayItem, s);
  2470.   }
  2471.   function checkArrayItem(item) {
  2472.     return item.fn.call(item.data, this);
  2473.   }
  2474.   function ends(s) {
  2475.     return s.endsWith(this) || (
  2476.       s.length > this.length &&
  2477.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2478.       endsWithSep(s));
  2479.   }
  2480.   function endsWithSep(s, pos = s.length - 1) {
  2481.     RX_SEP.lastIndex = pos;
  2482.     return RX_SEP.test(s);
  2483.   }
  2484.   function equals(s) {
  2485.     return s.startsWith(this) && (
  2486.       s.length === this.length ||
  2487.       s.length === this.length + 1 && endsWithSep(s));
  2488.   }
  2489.   function has(s) {
  2490.     return s.includes(this);
  2491.   }
  2492.   function regexp(s) {
  2493.     return s.includes(this[0]) && this[1].test(s);
  2494.   }
  2495.   function starts(s) {
  2496.     return s.startsWith(this);
  2497.   }
  2498.   function startsDomainPrescreen(url) {
  2499.     return url.includes(this[0]) && startsDomain.call(this, url);
  2500.   }
  2501.   function startsDomain(url) {
  2502.     let hostStart = url.indexOf('//');
  2503.     if (hostStart && url[hostStart - 1] !== ':')
  2504.       return;
  2505.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2506.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2507.     const [needle, domain, pinDomainEnd, endSep] = this;
  2508.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2509.     for (; ; start++) {
  2510.       start = host.indexOf(domain, start);
  2511.       if (start < 0)
  2512.         return;
  2513.       if (!start || host[start - 1] === '.')
  2514.         break;
  2515.     }
  2516.     start += hostStart;
  2517.     if (url.lastIndexOf(needle, start) !== start)
  2518.       return;
  2519.     const end = start + needle.length;
  2520.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2521.   }
  2522. })();
  2523.  
  2524. const Util = {
  2525.  
  2526.   addStyle(name, css) {
  2527.     const id = `${PREFIX}style:${name}`;
  2528.     const el = doc.getElementById(id) ||
  2529.                css && $create('style', {id});
  2530.     if (!el) return;
  2531.     if (el.textContent !== css)
  2532.       el.textContent = css;
  2533.     if (el.parentElement !== doc.head)
  2534.       doc.head.appendChild(el);
  2535.     return el;
  2536.   },
  2537.  
  2538.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2539.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2540.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2541.   },
  2542.  
  2543.   decodeHtmlEntities(s) {
  2544.     return s
  2545.       .replace(/&quot;/g, '"')
  2546.       .replace(/&apos;/g, '\'')
  2547.       .replace(/&lt;/g, '<')
  2548.       .replace(/&gt;/g, '>')
  2549.       .replace(/&amp;/g, '&');
  2550.   },
  2551.  
  2552.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2553.   decodeUrl(url) {
  2554.     if (!url) return url;
  2555.     const iPct = url.indexOf('%');
  2556.     const iColon = url.indexOf(':');
  2557.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2558.       decodeURIComponent(url) :
  2559.       url;
  2560.   },
  2561.  
  2562.   deepEqual(a, b) {
  2563.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2564.       return a === b;
  2565.     if (Array.isArray(a)) {
  2566.       return Array.isArray(b) &&
  2567.         a.length === b.length &&
  2568.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2569.     }
  2570.     const keys = Object.keys(a);
  2571.     return keys.length === Object.keys(b).length &&
  2572.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2573.   },
  2574.  
  2575.   forceLayout(node) {
  2576.     // eslint-disable-next-line no-unused-expressions
  2577.     node.clientHeight;
  2578.   },
  2579.  
  2580.   formatError(e, rule) {
  2581.     const message =
  2582.       e.message ||
  2583.       e.readyState && 'Request failed.' ||
  2584.       e.type === 'error' && `File can't be displayed.${
  2585.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2586.       }` ||
  2587.       e;
  2588.     const m = [
  2589.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2590.       ['', 'font-weight:normal'],
  2591.     ];
  2592.     m.push(...[
  2593.       ['Node: %o', ai.node],
  2594.       ['Rule: %o', rule],
  2595.       ai.url && ['URL: %s', ai.url],
  2596.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2597.     ].filter(Boolean));
  2598.     return {
  2599.       message,
  2600.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2601.       consoleArgs: m.map(([, v]) => v),
  2602.     };
  2603.   },
  2604.  
  2605.   isHovered(el) {
  2606.     // doesn't work in image tabs, browser bug?
  2607.     return App.isImageTab || el.closest(':hover');
  2608.   },
  2609.  
  2610.   isVideoUrl(url) {
  2611.     return url.startsWith('data:video') ||
  2612.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2613.   },
  2614.  
  2615.   newFunction(...args) {
  2616.     try {
  2617.       return App.NOP || new Function(...args);
  2618.     } catch (e) {
  2619.       if (!e.message.includes('unsafe-eval'))
  2620.         throw e;
  2621.       App.NOP = () => {};
  2622.       return App.NOP;
  2623.     }
  2624.   },
  2625.  
  2626.   rel2abs(rel, abs = location.href) {
  2627.     try {
  2628.       return rel.startsWith('data:') ? rel :
  2629.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2630.           /^[-\w]+:\/\//.test(rel) ? rel :
  2631.             new URL(rel, abs).href;
  2632.     } catch (e) {
  2633.       return rel;
  2634.     }
  2635.   },
  2636.  
  2637.   stringify(...args) {
  2638.     const p = Array.prototype;
  2639.     const {toJSON} = p;
  2640.     if (toJSON) p.toJSON = null;
  2641.     const res = JSON.stringify(...args);
  2642.     if (toJSON) p.toJSON = toJSON;
  2643.     return res;
  2644.   },
  2645.  
  2646.   suppressTooltip() {
  2647.     for (const node of [
  2648.       ai.node.parentNode,
  2649.       ai.node,
  2650.       ai.node.firstElementChild,
  2651.     ]) {
  2652.       const t = (node || 0).title;
  2653.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2654.         ai.tooltip = {node, text: t};
  2655.         node.title = '';
  2656.         break;
  2657.       }
  2658.     }
  2659.   },
  2660.  
  2661.   tabFixUrl() {
  2662.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2663.            navigator.userAgent.includes('Gecko/') &&
  2664.            flattenHtml(`data:text/html;charset=utf8,
  2665.       <style>
  2666.         body {
  2667.           margin: 0;
  2668.           padding: 0;
  2669.           background: #222;
  2670.         }
  2671.         .fit {
  2672.           overflow: hidden
  2673.         }
  2674.         .fit > img {
  2675.           max-width: 100vw;
  2676.           max-height: 100vh;
  2677.         }
  2678.         body > img {
  2679.           margin: auto;
  2680.           position: absolute;
  2681.           left: 0;
  2682.           right: 0;
  2683.           top: 0;
  2684.           bottom: 0;
  2685.         }
  2686.       </style>
  2687.       <body class=fit>
  2688.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2689.       </body>
  2690.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2691.   },
  2692. };
  2693.  
  2694. async function setup({rule} = {}) {
  2695.   if (typeof doc.body.attachShadow !== 'function') {
  2696.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2697.           'You can edit the script\'s storage directly in your userscript manager.');
  2698.     return;
  2699.   }
  2700.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2701.   let uiCfg;
  2702.   let root = (elConfig || 0).shadowRoot;
  2703.   let {blankRuleElement} = setup;
  2704.   /** @type NodeList */
  2705.   const UI = new Proxy({}, {
  2706.     get(_, id) {
  2707.       return root.getElementById(id);
  2708.     },
  2709.   });
  2710.   if (!rule || !elConfig)
  2711.     init(await Config.load({save: true}));
  2712.   if (rule)
  2713.     installRule(rule);
  2714.  
  2715.   function init(data) {
  2716.     uiCfg = data;
  2717.     $remove(elConfig);
  2718.     elConfig = $create('div', {contentEditable: true});
  2719.     root = elConfig.attachShadow({mode: 'open'});
  2720.     root.innerHTML = createConfigHtml();
  2721.     initEvents();
  2722.     renderAll();
  2723.     renderCustomScales();
  2724.     renderRules();
  2725.     doc.body.appendChild(elConfig);
  2726.     requestAnimationFrame(() => {
  2727.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2728.     });
  2729.   }
  2730.  
  2731.   function initEvents() {
  2732.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2733.     UI._export.onclick = e => {
  2734.       dropEvent(e);
  2735.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2736.       UI._exportNotification.hidden = false;
  2737.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2738.     };
  2739.     UI._import.onclick = e => {
  2740.       dropEvent(e);
  2741.       const s = prompt('Paste settings:');
  2742.       if (s)
  2743.         init(new Config({data: s}));
  2744.     };
  2745.     UI._install.onclick = setupRuleInstaller;
  2746.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2747.     UI._reveal.onclick = e => {
  2748.       e.preventDefault();
  2749.       cssApp.hidden = !cssApp.hidden;
  2750.       if (!cssApp.hidden) {
  2751.         if (!cssApp.value) {
  2752.           App.updateStyles();
  2753.           cssApp.value = App.globalStyle.trim();
  2754.           cssApp.setSelectionRange(0, 0);
  2755.         }
  2756.         cssApp.focus();
  2757.       }
  2758.     };
  2759.     UI.start.onchange = function () {
  2760.       UI.delay.closest('label').hidden =
  2761.         UI.preload.closest('label').hidden =
  2762.           this.value !== 'auto';
  2763.     };
  2764.     UI.start.onchange();
  2765.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2766.     // color
  2767.     for (const el of $$('[type="color"]', root)) {
  2768.       el.oninput = colorOnInput;
  2769.       el.elSwatch = el.nextElementSibling;
  2770.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2771.       el.elOpacity.elColor = el;
  2772.     }
  2773.     function colorOnInput() {
  2774.       this.elSwatch.style.setProperty('--color',
  2775.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2776.     }
  2777.     // range
  2778.     for (const el of $$('[type="range"]', root)) {
  2779.       el.oninput = rangeOnInput;
  2780.       el.onblur = rangeOnBlur;
  2781.       el.addEventListener('focusin', rangeOnFocus);
  2782.     }
  2783.     function rangeOnBlur(e) {
  2784.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2785.         this.elEdit.onblur(e);
  2786.     }
  2787.     function rangeOnFocus() {
  2788.       if (this.elEdit) return;
  2789.       const {min, max, step, value} = this;
  2790.       this.elEdit = $create('input', {
  2791.         value, min, max, step,
  2792.         className: 'range-edit',
  2793.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2794.         type: 'number',
  2795.         elRange: this,
  2796.         onblur: rangeEditOnBlur,
  2797.         oninput: rangeEditOnInput,
  2798.       });
  2799.       this.insertAdjacentElement('afterend', this.elEdit);
  2800.     }
  2801.     function rangeOnInput() {
  2802.       this.title = (this.dataset.title || '').replace('$', this.value);
  2803.       if (this.elColor) this.elColor.oninput();
  2804.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2805.     }
  2806.     // range-edit
  2807.     function rangeEditOnBlur(e) {
  2808.       if (e.relatedTarget !== this.elRange) {
  2809.         this.remove();
  2810.         this.elRange.elEdit = null;
  2811.       }
  2812.     }
  2813.     function rangeEditOnInput() {
  2814.       this.elRange.valueAsNumber = this.valueAsNumber;
  2815.       this.elRange.oninput();
  2816.     }
  2817.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2818.     // which may happen since it sees only the outer <div> in the event |target|
  2819.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2820.   }
  2821.  
  2822.   function closeSetup(event) {
  2823.     const isApply = this.id === '_apply';
  2824.     if (event && (this.id === '_ok' || isApply)) {
  2825.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2826.       Ruler.init();
  2827.       if (isApply) {
  2828.         renderCustomScales();
  2829.         UI._css.textContent = cfg._getCss();
  2830.         return;
  2831.       }
  2832.     }
  2833.     $remove(elConfig);
  2834.     elConfig = null;
  2835.   }
  2836.  
  2837.   function collectConfig({save, clone} = {}) {
  2838.     let data = {};
  2839.     for (const el of $$('input[id], select[id]', root))
  2840.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2841.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2842.           el.value || '';
  2843.     Object.assign(data, {
  2844.       css: UI.css.value.trim(),
  2845.       delay: UI.delay.valueAsNumber * 1000,
  2846.       hosts: collectRules(),
  2847.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2848.       scales: UI.scales.value
  2849.         .trim()
  2850.         .split(/[,;]*\s+/)
  2851.         .map(x => x.replace(',', '.'))
  2852.         .filter(x => !isNaN(parseFloat(x))),
  2853.     });
  2854.     if (clone)
  2855.       data = JSON.parse(Util.stringify(data));
  2856.     return new Config({data, save});
  2857.   }
  2858.  
  2859.   function collectRules() {
  2860.     return [...UI._rules.children]
  2861.       .map(el => [el.value.trim(), el[RULE]])
  2862.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2863.       .map(([s, json]) => json || s)
  2864.       .filter(Boolean);
  2865.   }
  2866.  
  2867.   function checkRule({target: el}) {
  2868.     let json, error, title;
  2869.     const prev = el.previousElementSibling;
  2870.     if (el.value) {
  2871.       json = Ruler.parse(el.value);
  2872.       error = json instanceof Error && (json.message || String(json));
  2873.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2874.         !/^[-.a-z0-9]*$/i.test(json.d);
  2875.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2876.         .filter(Boolean).join('\n');
  2877.       el.classList.toggle('invalid-domain', invalidDomain);
  2878.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  2879.       if (!prev)
  2880.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2881.     } else if (prev) {
  2882.       prev.focus();
  2883.       el.remove();
  2884.     }
  2885.     el[RULE] = !error && json;
  2886.     el.title = title;
  2887.     el.setCustomValidity(error || '');
  2888.   }
  2889.  
  2890.   function focusRule({type, target: el, relatedTarget: from}) {
  2891.     if (el === this)
  2892.       return;
  2893.     if (type === 'paste') {
  2894.       setTimeout(() => focusRule.call(this, {target: el}));
  2895.       return;
  2896.     }
  2897.     if (el[RULE])
  2898.       el.value = Ruler.format(el[RULE], {expand: true});
  2899.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2900.     if (h > el.offsetHeight)
  2901.       el.style.minHeight = h + 'px';
  2902.     if (!this.contains(from))
  2903.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2904.     if (from) {
  2905.       from.style.minHeight = '';
  2906.       if (from[RULE])
  2907.         from.value = Ruler.format(from[RULE]);
  2908.     }
  2909.   }
  2910.  
  2911.   function installRule(rule) {
  2912.     const inputs = UI._rules.children;
  2913.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2914.     if (!el) {
  2915.       el = inputs[0];
  2916.       el[RULE] = rule;
  2917.       el.value = Ruler.format(rule);
  2918.       el.hidden = false;
  2919.       const i = Math.max(0, collectRules().indexOf(rule));
  2920.       inputs[i].insertAdjacentElement('afterend', el);
  2921.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2922.     }
  2923.     const rect = el.getBoundingClientRect();
  2924.     if (rect.bottom < 0 ||
  2925.         rect.bottom > el.parentNode.offsetHeight)
  2926.       el.scrollIntoView();
  2927.     el.classList.add('highlight');
  2928.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2929.     el.focus();
  2930.   }
  2931.  
  2932.   function renderRules() {
  2933.     const rules = UI._rules;
  2934.     rules.addEventListener('input', checkRule);
  2935.     rules.addEventListener('focusin', focusRule);
  2936.     rules.addEventListener('paste', focusRule);
  2937.     blankRuleElement =
  2938.       setup.blankRuleElement =
  2939.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2940.     for (const rule of uiCfg.hosts || []) {
  2941.       const el = blankRuleElement.cloneNode();
  2942.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2943.       rules.appendChild(el);
  2944.       checkRule({target: el});
  2945.     }
  2946.     const search = UI._search;
  2947.     search.oninput = () => {
  2948.       setup.search = search.value;
  2949.       const s = search.value.toLowerCase();
  2950.       for (const el of rules.children)
  2951.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2952.     };
  2953.     search.value = setup.search || '';
  2954.     if (search.value)
  2955.       search.oninput();
  2956.   }
  2957.  
  2958.   function renderCustomScales() {
  2959.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2960.   }
  2961.  
  2962.   function renderAll() {
  2963.     for (const el of $$('input[id], select[id], textarea[id]', root))
  2964.       if (el.id in uiCfg)
  2965.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  2966.     for (const el of $$('input[type="range"]', root))
  2967.       el.oninput();
  2968.     for (const el of $$('a[href^="http"]', root))
  2969.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  2970.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  2971.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  2972.   }
  2973. }
  2974.  
  2975. function setupClickedRule(event) {
  2976.   let rule;
  2977.   const el = event.target.closest('blockquote, code, pre');
  2978.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  2979.     dropEvent(event);
  2980.     setup({rule});
  2981.   }
  2982. }
  2983.  
  2984. async function setupRuleInstaller(e) {
  2985.   dropEvent(e);
  2986.   const parent = this.parentElement;
  2987.   parent.children._installLoading.hidden = false;
  2988.   this.remove();
  2989.   let rules;
  2990.  
  2991.   try {
  2992.     rules = extractRules(await Remoting.getDoc(this.href));
  2993.     const selector = $create('select', {
  2994.       size: 8,
  2995.       style: 'width: 100%',
  2996.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2997.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2998.     });
  2999.     selector.append(...rules.map(renderRule));
  3000.     selector.selectedIndex = findMatchingRuleIndex();
  3001.     parent.children._installLoading.remove();
  3002.     parent.children._installHint.hidden = false;
  3003.     parent.appendChild(selector);
  3004.     requestAnimationFrame(() => {
  3005.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3006.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3007.       selector.focus();
  3008.     });
  3009.   } catch (e) {
  3010.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3011.   }
  3012.  
  3013.   function extractRules({doc}) {
  3014.     // sort by name
  3015.     return [...$$('#wiki-body tr', doc)]
  3016.       .map(tr => [
  3017.         tr.cells[0].textContent.trim(),
  3018.         Ruler.fromElement(tr.cells[1]),
  3019.       ])
  3020.       .filter(([name, r]) =>
  3021.         name && r && (!r.d || hostname.includes(r.d)))
  3022.       .sort(([a], [b]) =>
  3023.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3024.           a > b ? 1 :
  3025.             0);
  3026.   }
  3027.  
  3028.   function findMatchingRuleIndex() {
  3029.     const dottedHost = `.${hostname}.`;
  3030.     let maxCount = 0, maxIndex = 0, index = 0;
  3031.     for (const [name, {d}] of rules) {
  3032.       let count = !!(d && hostname.includes(d)) * 10;
  3033.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3034.         count += dottedHost.includes(`.${part}.`) && part.length;
  3035.       if (count > maxCount) {
  3036.         maxCount = count;
  3037.         maxIndex = index;
  3038.       }
  3039.       index++;
  3040.     }
  3041.     return maxIndex;
  3042.   }
  3043.  
  3044.   function renderRule([name, rule]) {
  3045.     return $create('option', {
  3046.       textContent: name,
  3047.       title: Ruler.format(rule, {expand: true})
  3048.         .replace(/^{|\s*}$/g, '')
  3049.         .split('\n')
  3050.         .slice(0, 12)
  3051.         .map(renderTitleLine)
  3052.         .filter(Boolean)
  3053.         .join('\n'),
  3054.     });
  3055.   }
  3056.  
  3057.   function renderTitleLine(line, i, arr) {
  3058.     return (
  3059.       // show ... on 10th line if there are more lines
  3060.       i === 9 && arr.length > 10 ? '...' :
  3061.         i > 10 ? '' :
  3062.           // truncate to 100 chars
  3063.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3064.             // strip the leading space
  3065.             .replace(/^\s/, ''));
  3066.   }
  3067.  
  3068.   function maybeSetup(e) {
  3069.     if (!eventModifiers(e))
  3070.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3071.   }
  3072. }
  3073.  
  3074. function createConfigHtml() {
  3075.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/Rules';
  3076.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3077.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3078.   return flattenHtml(`
  3079. <style>
  3080.   :host {
  3081.     all: initial !important;
  3082.     position: fixed !important;
  3083.     z-index: 2147483647 !important;
  3084.     top: 20px !important;
  3085.     right: 20px !important;
  3086.     padding: 1.5em !important;
  3087.     color: #000 !important;
  3088.     background: #eee !important;
  3089.     box-shadow: 5px 5px 25px 2px #000 !important;
  3090.     width: 32em !important;
  3091.     border: 1px solid black !important;
  3092.     display: flex !important;
  3093.     flex-direction: column !important;
  3094.   }
  3095.   main {
  3096.     font: 12px/15px sans-serif;
  3097.   }
  3098.   ul {
  3099.     max-height: calc(100vh - 200px);
  3100.     margin: 10px 0 15px 0;
  3101.     padding: 0;
  3102.     list-style: none;
  3103.   }
  3104.   li {
  3105.     margin: 0;
  3106.     padding: .25em 0;
  3107.   }
  3108.   li.options {
  3109.     display: flex;
  3110.     align-items: center;
  3111.     justify-content: space-between;
  3112.   }
  3113.   li.row {
  3114.     flex-wrap: wrap;
  3115.     justify-content: flex-start;
  3116.   }
  3117.   li.row label {
  3118.     flex-direction: row;
  3119.     align-items: center;
  3120.   }
  3121.   li.row input {
  3122.     margin-right: .25em;
  3123.   }
  3124.   li.stretch label {
  3125.     flex: 1;
  3126.     white-space: nowrap;
  3127.   }
  3128.   li.stretch label > span {
  3129.     display: flex;
  3130.     flex-direction: row;
  3131.     flex: 1;
  3132.   }
  3133.   label {
  3134.     display: inline-flex;
  3135.     flex-direction: column;
  3136.   }
  3137.   label:not(:last-child) {
  3138.     margin-right: 1em;
  3139.   }
  3140.   input, select {
  3141.     min-height: 1.6em;
  3142.     box-sizing: border-box;
  3143.   }
  3144.   input[type=checkbox] {
  3145.     margin-left: 0;
  3146.   }
  3147.   input[type=number] {
  3148.     width: 4em;
  3149.   }
  3150.   input:not([type=checkbox])  {
  3151.     padding: 0 .25em;
  3152.   }
  3153.   input[type=range] {
  3154.     flex: 1;
  3155.     width: 100%;
  3156.     margin: 0 .25em;
  3157.     padding: 0;
  3158.     filter: saturate(0);
  3159.     opacity: .5;
  3160.   }
  3161.   u + input[type=range] {
  3162.     max-width: 3em;
  3163.   }
  3164.   input[type=range]:hover {
  3165.     filter: none;
  3166.     opacity: 1;
  3167.   }
  3168.   input[type=color] {
  3169.     position: absolute;
  3170.     width: calc(1.5em + 2px);
  3171.     opacity: 0;
  3172.     cursor: pointer;
  3173.   }
  3174.   u {
  3175.     position: relative;
  3176.     flex: 0 0 1.5em;
  3177.     height: 1.5em;
  3178.     border: 1px solid #888;
  3179.     pointer-events: none;
  3180.     color: #888;
  3181.     background-image:
  3182.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3183.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3184.     background-size: .5em .5em;
  3185.     background-position: 0 0, .25em .25em;
  3186.   }
  3187.   u::after {
  3188.     position: absolute;
  3189.     top: 0;
  3190.     left: 0;
  3191.     right: 0;
  3192.     bottom: 0;
  3193.     content: "";
  3194.     background-color: var(--color);
  3195.   }
  3196.   .range-edit {
  3197.     position: absolute;
  3198.     box-shadow: 0 0.25em 1em #000;
  3199.     z-index: 99;
  3200.   }
  3201.   #_rules input,
  3202.   textarea {
  3203.     flex: 1;
  3204.     resize: vertical;
  3205.     margin: 1px 0;
  3206.     font: 11px/1.25 Consolas, monospace;
  3207.   }
  3208.   :invalid {
  3209.     background-color: #f002;
  3210.     border-color: #800;
  3211.   }
  3212.   code {
  3213.     font-weight: bold;
  3214.   }
  3215.   a {
  3216.     text-decoration: none;
  3217.   }
  3218.   a:hover {
  3219.     text-decoration: underline;
  3220.   }
  3221.   button {
  3222.     padding: .2em 1em;
  3223.     margin: 0 1em;
  3224.   }
  3225.   kbd {
  3226.     padding: 1px 6px;
  3227.     font-weight: bold;
  3228.     font-family: Consolas, monospace;
  3229.     border: 1px solid #888;
  3230.     border-radius: 3px;
  3231.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3232.   }
  3233.   .column {
  3234.     display: flex;
  3235.     flex-direction: column;
  3236.   }
  3237.   .highlight {
  3238.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3239.     animation-fill-mode: both;
  3240.   }
  3241.   #_rules > * {
  3242.     word-break: break-all;
  3243.   }
  3244.   #_rules > :not(:focus) {
  3245.     overflow: hidden; /* prevents wrapping in FF */
  3246.   }
  3247.   .invalid-domain {
  3248.     opacity: .5;
  3249.   }
  3250.   .matching-domain {
  3251.     border-color: #56b8ff;
  3252.     background: #d7eaff;
  3253.   }
  3254.   #_x {
  3255.     position: absolute;
  3256.     top: 0;
  3257.     right: 0;
  3258.     padding: 4px 8px;
  3259.     cursor: pointer;
  3260.     user-select: none;
  3261.   }
  3262.   #_x:hover {
  3263.     background-color: #8884;
  3264.   }
  3265.   #_cssApp {
  3266.     color: seagreen;
  3267.   }
  3268.   #_exportNotification {
  3269.     color: green;
  3270.     font-weight: bold;
  3271.     position: absolute;
  3272.     left: 0;
  3273.     right: 0;
  3274.     bottom: 2px;
  3275.   }
  3276.   #_installHint {
  3277.     color: green;
  3278.   }
  3279.   @keyframes fade-in {
  3280.     from { background-color: deepskyblue }
  3281.     to {}
  3282.   }
  3283.   @media (prefers-color-scheme: dark) {
  3284.     :host {
  3285.       color: #aaa !important;
  3286.       background: #333 !important;
  3287.     }
  3288.     a {
  3289.       color: deepskyblue;
  3290.     }
  3291.     button {
  3292.       background: linear-gradient(-5deg, #333, #555);
  3293.       border: 1px solid #000;
  3294.       box-shadow: 0 2px 6px #181818;
  3295.       border-radius: 3px;
  3296.       cursor: pointer;
  3297.     }
  3298.     button:hover {
  3299.       background: linear-gradient(-5deg, #333, #666);
  3300.     }
  3301.     textarea, input, select {
  3302.       background: #111;
  3303.       color: #BBB;
  3304.       border: 1px solid #555;
  3305.     }
  3306.     input[type=checkbox] {
  3307.       filter: invert(1);
  3308.     }
  3309.     input[type=range] {
  3310.       filter: invert(1) saturate(0);
  3311.     }
  3312.     input[type=range]:hover {
  3313.       filter: invert(1);
  3314.     }
  3315.     kbd {
  3316.       border-color: #666;
  3317.     }
  3318.     @supports (-moz-appearance: none) {
  3319.       input[type=checkbox],
  3320.       input[type=range],
  3321.       input[type=range]:hover {
  3322.         filter: none;
  3323.       }
  3324.     }
  3325.     .range-edit {
  3326.       box-shadow: 0 .5em 1em .5em #000;
  3327.     }
  3328.     .matching-domain {
  3329.       border-color: #0065af;
  3330.       background: #032b58;
  3331.       color: #ddd;
  3332.     }
  3333.     #_cssApp {
  3334.       color: darkseagreen;
  3335.     }
  3336.     #_installHint {
  3337.       color: greenyellow;
  3338.     }
  3339.     ::-webkit-scrollbar {
  3340.       width: 14px;
  3341.       height: 14px;
  3342.       background: #333;
  3343.     }
  3344.     ::-webkit-scrollbar-button:single-button {
  3345.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3346.     }
  3347.     ::-webkit-scrollbar-track-piece {
  3348.       background: #444;
  3349.       border: 4px solid #333;
  3350.       border-radius: 8px;
  3351.     }
  3352.     ::-webkit-scrollbar-thumb {
  3353.       border: 3px solid #333;
  3354.       border-radius: 8px;
  3355.       background: #666;
  3356.     }
  3357.     ::-webkit-resizer {
  3358.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3359.       border: 2px solid transparent;
  3360.     }
  3361.   }
  3362. </style>
  3363. <style id="_css">${cfg._getCss()}</style>
  3364. <main id="${PREFIX}setup">
  3365.   <div id=_x>x</div>
  3366.   <ul class=column>
  3367.     <details style="margin: -2em 0 1em">
  3368.       <summary style="cursor:pointer"><b>Click to view help & hotkeys</b></summary>
  3369.       <table style="text-align:left">
  3370.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3371.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3372.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3373.         <tr><th>Force-activate<br>(for small pics)</th>
  3374.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3375.         <tr><td>&nbsp;</td></tr>
  3376.         <tr><th>Start zooming</th>
  3377.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3378.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3379.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3380.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3381.         <tr><th>Previous/next<br>in album</th>
  3382.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3383.         <tr><td>&nbsp;</td></tr>
  3384.         <tr><th>Download</th><td><kbd>d</kbd> key while popup is visible</td></tr>
  3385.         <tr><th>Mute/unmute</th><td><kbd>m</kbd> key while popup is visible</td></tr>
  3386.         <tr><th>Open in tab</th><td><kbd>t</kbd> key while popup is visible</td></tr>
  3387.       </table>
  3388.     </details>
  3389.     <li class=options>
  3390.       <label>Popup shows on
  3391.         <select id=start>
  3392.           <option value=auto>automatically
  3393.           <option value=context>Right click / Ctrl
  3394.           <option value=ctrl>Ctrl
  3395.         </select>
  3396.       </label>
  3397.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3398.       <label title="(if the full version of the hovered image is ...% larger)">
  3399.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3400.       </label>
  3401.       <label>Zoom activates on
  3402.         <select id=zoom>
  3403.           <option value=context>Right click / Shift
  3404.           <option value=wheel>Wheel up / Shift
  3405.           <option value=shift>Shift
  3406.           <option value=auto>automatically
  3407.         </select>
  3408.       </label>
  3409.       <label>...and zooms to
  3410.         <select id=fit>
  3411.           <option value=all>fit to window
  3412.           <option value=large>fit if larger
  3413.           <option value=no>100%
  3414.           <option value="" title="Use custom scale factors">custom
  3415.         </select>
  3416.       </label>
  3417.     </li>
  3418.     <li class=options>
  3419.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3420.       </label>
  3421.       <label>When fully zoomed out:
  3422.         <select id=zoomOut>
  3423.           <option value=stay>stay in zoom mode
  3424.           <option value=auto>stay if still hovered
  3425.           <option value=unzoom>undo zoom mode
  3426.           <option value=close>close popup
  3427.         </select>
  3428.       </label>
  3429.       <label style="flex: 1" title="${trimLeft(`
  3430.         Scale factors to use when “zooms to” selector is set to “custom”.
  3431.         0 = fit to window,
  3432.         0! = same as 0 but also removes smaller values,
  3433.         * after a value marks the default zoom factor, for example: 1*
  3434.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3435.         ${scalesHint}
  3436.       `)}">Custom scale factors:
  3437.         <input id=scales placeholder="${scalesHint}">
  3438.       </label>
  3439.     </li>
  3440.     <li class="options row">
  3441.       <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3442.         <input type=checkbox id=center>Centered*</label>
  3443.       <label title="Provides smoother experience but increases network traffic">
  3444.         <input type=checkbox id=preload>Preload on hover*</label>
  3445.       <label title="...or show a partial image while still loading">
  3446.         <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3447.       <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3448.       <label><input type=checkbox id=mute>Mute videos</label>
  3449.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3450.       <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3451.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt;*</label>
  3452.       <label title="Disable only if you spoof the HTTP headers yourself">
  3453.         <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3454.     </li>
  3455.     <li class="options stretch">
  3456.       <label>Background
  3457.         <span>
  3458.           <input id=uiBackgroundColor type=color><u></u>
  3459.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3460.         </span>
  3461.       </label>
  3462.       <label>Border color, opacity, size
  3463.         <span>
  3464.           <input id=uiBorderColor type=color><u></u>
  3465.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3466.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3467.         </span>
  3468.       </label>
  3469.       <label>Shadow color, opacity, size
  3470.         <span>
  3471.           <input id=uiShadowColor type=color><u></u>
  3472.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3473.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3474.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3475.         </span>
  3476.       </label>
  3477.       <label>Padding
  3478.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3479.       </label>
  3480.       <label>Margin
  3481.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3482.       </label>
  3483.     </li>
  3484.     <li>
  3485.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3486.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3487.       <a href="#" id=_reveal style="float: right"
  3488.          title="You can copy parts of it to override them in your custom CSS">
  3489.          View the built-in CSS</a>
  3490.       <div class=column>
  3491.         <textarea id=css spellcheck=false></textarea>
  3492.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3493.       </div>
  3494.     </li>
  3495.     <li style="display: flex; justify-content: space-between;">
  3496.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3497.       <div style="white-space: nowrap">
  3498.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3499.         in "d" value, for example <code>"d": "!foo.com"</code>
  3500.       </div>
  3501.       <div>
  3502.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3503.       </div>
  3504.     </li>
  3505.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3506.       <div id=_rules class=column>
  3507.         <textarea rows=1 spellcheck=false></textarea>
  3508.       </div>
  3509.     </li>
  3510.     <li>
  3511.       <div hidden id=_installLoading>Loading...</div>
  3512.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3513.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3514.       <a href="${MPIV_BASE_URL}" id=_install>Install rule from repository...</a>
  3515.     </li>
  3516.   </ul>
  3517.   <div style="text-align:center">
  3518.     <button id=_ok accesskey=s>OK</button>
  3519.     <button id=_apply accesskey=a>Apply</button>
  3520.     <button id=_import style="margin-right: 0">Import</button>
  3521.     <button id=_export style="margin-left: 0">Export</button>
  3522.     <button id=_cancel>Cancel</button>
  3523.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3524.   </div>
  3525. </main>`);
  3526. }
  3527.  
  3528. function createGlobalStyle() {
  3529.   App.globalStyle = /*language=CSS*/ (String.raw`
  3530. #\mpiv-bar {
  3531.   position: fixed;
  3532.   z-index: 2147483647;
  3533.   top: 0;
  3534.   left: 0;
  3535.   right: 0;
  3536.   opacity: 0;
  3537.   transition: opacity 1s ease .25s;
  3538.   text-align: center;
  3539.   font-family: sans-serif;
  3540.   font-size: 15px;
  3541.   font-weight: bold;
  3542.   background: #0005;
  3543.   color: white;
  3544.   padding: 4px 10px;
  3545.   text-shadow: .5px .5px 2px #000;
  3546. }
  3547. #\mpiv-bar.\mpiv-show,
  3548. #\mpiv-bar[data-force] {
  3549.   opacity: 1;
  3550. }
  3551. #\mpiv-bar[data-zoom]::after {
  3552.   content: " (" attr(data-zoom) ")";
  3553.   opacity: .8;
  3554. }
  3555. #\mpiv-popup.\mpiv-show {
  3556.   display: inline;
  3557. }
  3558. #\mpiv-popup {
  3559.   display: none;
  3560.   cursor: none;
  3561. ${cfg.uiFadein ? String.raw`
  3562.   animation: .2s \mpiv-fadein both;
  3563.   transition: box-shadow .25s, background-color .25s;
  3564.   ` : ''}
  3565. ${App.popupStyleBase = `
  3566.   border: none;
  3567.   box-sizing: border-box;
  3568.   position: fixed;
  3569.   z-index: 2147483647;
  3570.   padding: 0;
  3571.   margin: 0;
  3572.   top: 0;
  3573.   left: 0;
  3574.   width: auto;
  3575.   height: auto;
  3576.   transform-origin: center;
  3577.   max-width: none;
  3578.   max-height: none;
  3579. `}
  3580. }
  3581. #\mpiv-popup.\mpiv-show {
  3582.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3583.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3584.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3585.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3586. }
  3587. #\mpiv-popup.\mpiv-show[loaded] {
  3588.   background-color: ${Util.color('Background')};
  3589.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3590. }
  3591. #\mpiv-popup.\mpiv-zoom-max {
  3592.   image-rendering: pixelated;
  3593. }
  3594. #\mpiv-setup {
  3595. }
  3596. @keyframes \mpiv-fadein {
  3597.   from {
  3598.     opacity: 0;
  3599.     border-color: transparent;
  3600.   }
  3601.   to {
  3602.     opacity: 1;
  3603.   }
  3604. }
  3605. ` + (cfg.globalStatus ? String.raw`
  3606. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3607.   cursor: progress !important;
  3608. }
  3609. :root.\mpiv-edge #\mpiv-popup {
  3610.   cursor: default;
  3611. }
  3612. :root.\mpiv-error *:hover {
  3613.   cursor: not-allowed !important;
  3614. }
  3615. :root.\mpiv-ready *:hover,
  3616. :root.\mpiv-large *:hover {
  3617.   cursor: zoom-in !important;
  3618. }
  3619. :root.\mpiv-shift *:hover {
  3620.   cursor: default !important;
  3621. }
  3622. ` : String.raw`
  3623. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3624.   cursor: progress;
  3625. }
  3626. [\mpiv-status~="edge"]:hover {
  3627.   cursor: default;
  3628. }
  3629. [\mpiv-status~="error"]:hover {
  3630.   cursor: not-allowed;
  3631. }
  3632. [\mpiv-status~="ready"]:hover,
  3633. [\mpiv-status~="large"]:hover {
  3634.   cursor: zoom-in;
  3635. }
  3636. [\mpiv-status~="shift"]:hover {
  3637.   cursor: default;
  3638. }
  3639. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3640.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3641.   return App.globalStyle;
  3642. }
  3643.  
  3644. //#region Global utilities
  3645.  
  3646. const clamp = (v, min, max) =>
  3647.   v < min ? min : v > max ? max : v;
  3648.  
  3649. const compareNumbers = (a, b) =>
  3650.   a - b;
  3651.  
  3652. const flattenHtml = str =>
  3653.   str.trim().replace(/\n\s*/g, '');
  3654.  
  3655. const dropEvent = e =>
  3656.   (e.preventDefault(), e.stopPropagation());
  3657.  
  3658. const ensureArray = v =>
  3659.   Array.isArray(v) ? v : [v];
  3660.  
  3661. /** @param {KeyboardEvent} e */
  3662. const eventModifiers = e =>
  3663.   (e.altKey ? '!' : '') +
  3664.   (e.ctrlKey ? '^' : '') +
  3665.   (e.metaKey ? '#' : '') +
  3666.   (e.shiftKey ? '+' : '');
  3667.  
  3668. const now = performance.now.bind(performance);
  3669.  
  3670. const sumProps = (...props) => {
  3671.   let sum = 0;
  3672.   for (const p of props)
  3673.     sum += parseFloat(p) || 0;
  3674.   return sum;
  3675. };
  3676.  
  3677. const tryCatch = function (fn, ...args) {
  3678.   try {
  3679.     return fn.apply(this, args);
  3680.   } catch (e) {}
  3681. };
  3682.  
  3683. const $ = (sel, node = doc) =>
  3684.   node.querySelector(sel) || false;
  3685.  
  3686. const $$ = (sel, node = doc) =>
  3687.   node.querySelectorAll(sel);
  3688.  
  3689. const $create = (tag, props) =>
  3690.   Object.assign(doc.createElement(tag), props);
  3691.  
  3692. const $css = (el, props) =>
  3693.   Object.entries(props).forEach(([k, v]) =>
  3694.     el.style.setProperty(k, v, 'important'));
  3695.  
  3696. const $many = (q, doc) => {
  3697.   for (const selector of ensureArray(q)) {
  3698.     const el = selector && $(selector, doc);
  3699.     if (el)
  3700.       return el;
  3701.   }
  3702. };
  3703.  
  3704. const $prop = (sel, prop, node = doc) =>
  3705.   (node = $(sel, node)) && node[prop] || '';
  3706.  
  3707. const $propUp = (node, prop) =>
  3708.   (node = node.closest(`[${prop}]`)) &&
  3709.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3710.   '';
  3711.  
  3712. const $remove = node =>
  3713.   node && node.remove();
  3714.  
  3715. //#endregion
  3716. //#region Init
  3717.  
  3718. Config.load({save: true}).then(res => {
  3719.   cfg = res;
  3720.   if (window === top)
  3721.     GM.registerMenuCommand('MPIV: configure', setup);
  3722.  
  3723.   if (doc.body) App.checkImageTab();
  3724.   else doc.addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3725.  
  3726.   doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3727.   doc.addEventListener('contextmenu', Events.onContext);
  3728.   doc.addEventListener('keydown', Events.onKeyDown);
  3729.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3730.     doc.addEventListener('click', setupClickedRule);
  3731.   window.addEventListener('message', App.onMessage);
  3732. });
  3733.  
  3734. //#endregion