☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-12-30 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_addElement
  9. // @grant       GM_download
  10. // @grant       GM_getValue
  11. // @grant       GM_openInTab
  12. // @grant       GM_registerMenuCommand
  13. // @grant       GM_unregisterMenuCommand
  14. // @grant       GM_setClipboard
  15. // @grant       GM_setValue
  16. // @grant       GM_xmlhttpRequest
  17. //
  18. // @grant       GM.getValue
  19. // @grant       GM.openInTab
  20. // @grant       GM.registerMenuCommand
  21. // @grant       GM.unregisterMenuCommand
  22. // @grant       GM.setClipboard
  23. // @grant       GM.setValue
  24. // @grant       GM.xmlHttpRequest
  25. //
  26. // @version     1.2.16
  27. // @author      tophf
  28. //
  29. // @original-version 2017.9.29
  30. // @original-author  kuehlschrank
  31. //
  32. // @connect     *
  33. // CSP check:
  34. // @connect     self
  35. // rule installer in config dialog:
  36. // @connect     github.com
  37. // big/trusted hostings for the built-in rules with "q":
  38. // @connect     deviantart.com
  39. // @connect     facebook.com
  40. // @connect     fbcdn.com
  41. // @connect     flickr.com
  42. // @connect     gfycat.com
  43. // @connect     googleusercontent.com
  44. // @connect     gyazo.com
  45. // @connect     imgur.com
  46. // @connect     instagr.am
  47. // @connect     instagram.com
  48. // @connect     prnt.sc
  49. // @connect     prntscr.com
  50. // @connect     user-images.githubusercontent.com
  51. //
  52. // @supportURL  https://github.com/tophf/mpiv/issues
  53. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  54. // ==/UserScript==
  55.  
  56. 'use strict';
  57.  
  58. //#region Globals
  59.  
  60. /** @type mpiv.Config */
  61. let cfg;
  62. /** @type mpiv.AppInfo */
  63. let ai = {rule: {}};
  64. /** @type Element */
  65. let elConfig;
  66. let nonce;
  67.  
  68. const doc = document;
  69. const hostname = location.hostname;
  70. const dotDomain = '.' + hostname;
  71. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  72. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75.  
  76. const PREFIX = 'mpiv-';
  77. const STATUS_ATTR = `${PREFIX}status`;
  78. const MSG = Object.assign({}, ...[
  79.   'getViewSize',
  80.   'viewSize',
  81. ].map(k => ({[k]: `${PREFIX}${k}`})));
  82. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  83. // time for volatile things to settle down meanwhile we postpone action
  84. // examples: loading image from cache, quickly moving mouse over one element to another
  85. const SETTLE_TIME = 50;
  86. // used to detect JS code in host rules
  87. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  88. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  89. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  90. const ZOOM_MAX = 16;
  91. const SYM_U = Symbol('u');
  92. const TRUSTED = (({trustedTypes}, policy) =>
  93.   trustedTypes ? trustedTypes.createPolicy('mpiv', policy) : policy
  94. )(window, {
  95.   createHTML: str => str,
  96.   createScript: str => str,
  97. });
  98. const FN_ARGS = {
  99.   s: ['m', 'node', 'rule'],
  100.   c: ['text', 'doc', 'node', 'rule'],
  101.   q: ['text', 'doc', 'node', 'rule'],
  102.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  103. };
  104. //#endregion
  105. //#region GM4 polyfill
  106.  
  107. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  108.   this.GM = {info: GM_info};
  109. if (!GM.getValue)
  110.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  111. if (!GM.setValue)
  112.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  113. if (!GM.openInTab)
  114.   GM.openInTab = GM_openInTab;
  115. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  116.   GM.registerMenuCommand = GM_registerMenuCommand;
  117. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  118.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  119. if (!GM.setClipboard)
  120.   GM.setClipboard = GM_setClipboard;
  121. if (!GM.xmlHttpRequest)
  122.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  123.  
  124. //#endregion
  125.  
  126. const App = {
  127.  
  128.   isEnabled: true,
  129.   isImageTab: false,
  130.   globalStyle: '',
  131.   popupStyleBase: '',
  132.  
  133.   activate(info, event) {
  134.     const {match, node, rule, url} = info;
  135.     if (elConfig) console.info({node, rule, url, match});
  136.     if (ai.node) App.deactivate();
  137.     ai = info;
  138.     ai.force = event.ctrlKey;
  139.     ai.gNum = 0;
  140.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  141.     Util.suppressTooltip();
  142.     Calc.updateViewSize();
  143.     Events.toggle(true);
  144.     Events.trackMouse(event);
  145.     if (ai.force) {
  146.       App.start();
  147.     } else if (cfg.start === 'auto' && !rule.manual) {
  148.       App.belate();
  149.     } else {
  150.       Status.set('ready');
  151.     }
  152.   },
  153.  
  154.   belate() {
  155.     if (cfg.preload) {
  156.       ai.preloadStart = now();
  157.       App.start();
  158.       Status.set('+preloading');
  159.       setTimeout(Status.set, cfg.delay, '-preloading');
  160.     } else {
  161.       ai.timer = setTimeout(App.start, cfg.delay);
  162.     }
  163.   },
  164.  
  165.   checkImageTab() {
  166.     const el = doc.body.firstElementChild;
  167.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  168.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  169.   },
  170.  
  171.   checkProgress({start} = {}) {
  172.     const p = ai.popup;
  173.     if (!p)
  174.       return;
  175.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  176.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  177.     if (h)
  178.       return App.canCommit(w, h);
  179.     if (start) {
  180.       clearInterval(ai.timerProgress);
  181.       ai.timerProgress = setInterval(App.checkProgress, 150);
  182.     }
  183.   },
  184.  
  185.   canCommit(w, h) {
  186.     if (!ai.force && ai.rect && !ai.gItems &&
  187.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  188.       App.deactivate();
  189.       return false;
  190.     }
  191.     App.stopTimers();
  192.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  193.     if (wait > 0) {
  194.       ai.timer = setTimeout(App.checkProgress, wait);
  195.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  196.       App.handleError({type: 'error'});
  197.     } else {
  198.       App.commit();
  199.     }
  200.     return true;
  201.   },
  202.  
  203.   async commit() {
  204.     const p = ai.popup;
  205.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  206.     if (isDecoded) {
  207.       await p.decode();
  208.       if (p !== ai.popup)
  209.         return;
  210.     }
  211.     App.updateStyles();
  212.     Calc.measurePopup();
  213.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  214.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  215.     if (willMove)
  216.       Popup.move();
  217.     Bar.updateName();
  218.     Bar.updateDetails();
  219.     Status.set(!ai.popupLoaded && 'loading');
  220.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  221.                ai.nheight > p.clientHeight + ai.extras.h;
  222.     if (ai.large) {
  223.       Status.set('+large');
  224.       // prevent a blank bg+border in FF
  225.       if (isFF && p.complete && !isDecoded)
  226.         p.style.backgroundImage = `url('${p.src}')`;
  227.     }
  228.   },
  229.  
  230.   deactivate({wait} = {}) {
  231.     App.stopTimers();
  232.     if (ai.req)
  233.       tryCatch.call(ai.req, ai.req.abort);
  234.     if (ai.tooltip)
  235.       ai.tooltip.node.title = ai.tooltip.text;
  236.     Status.set(false);
  237.     Bar.set(false);
  238.     Events.toggle(false);
  239.     Popup.destroy();
  240.     if (wait) {
  241.       App.isEnabled = false;
  242.       setTimeout(App.enable, 200);
  243.     }
  244.     ai = {rule: {}};
  245.   },
  246.  
  247.   enable() {
  248.     App.isEnabled = true;
  249.   },
  250.  
  251.   handleError(e, rule = ai.rule) {
  252.     if (rule && rule.onerror === 'skip')
  253.       return;
  254.     const fe = Util.formatError(e, rule);
  255.     if (!rule || !ai.urls || !ai.urls.length)
  256.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  257.     if (ai.urls && ai.urls.length) {
  258.       ai.url = ai.urls.shift();
  259.       if (ai.url) {
  260.         App.stopTimers();
  261.         App.startSingle();
  262.       } else {
  263.         App.deactivate();
  264.       }
  265.     } else if (ai.node) {
  266.       Status.set('error');
  267.       Bar.set(fe.message, 'error');
  268.     }
  269.   },
  270.  
  271.   /** @param {MessageEvent} e */
  272.   onMessage(e) {
  273.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  274.       e.stopImmediatePropagation();
  275.       for (const el of doc.getElementsByTagName('iframe')) {
  276.         if (el.contentWindow === e.source) {
  277.           const s = Calc.frameSize(el, window).join(':');
  278.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  279.           return;
  280.         }
  281.       }
  282.     }
  283.   },
  284.  
  285.   /** @param {MessageEvent} e */
  286.   onMessageChild(e) {
  287.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  288.       e.stopImmediatePropagation();
  289.       removeEventListener('message', App.onMessageChild, true);
  290.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  291.       if (w && h) ai.view = {w, h, x, y};
  292.     }
  293.   },
  294.  
  295.   start() {
  296.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  297.     if (!Util.isHovered(ai.node)) {
  298.       App.deactivate();
  299.       return;
  300.     }
  301.     App.updateStyles();
  302.     if (ai.gallery)
  303.       App.startGallery();
  304.     else
  305.       App.startSingle();
  306.   },
  307.  
  308.   startSingle() {
  309.     Status.loading();
  310.     ai.imageUrl = null;
  311.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  312.       Remoting.findRedirect();
  313.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  314.       App.startFromQ();
  315.     } else {
  316.       Popup.create(ai.url);
  317.       Ruler.runC();
  318.     }
  319.   },
  320.  
  321.   async startFromQ() {
  322.     try {
  323.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  324.       const url = Ruler.runQ(responseText, doc, finalUrl);
  325.       if (!url)
  326.         throw 'The "q" rule did not produce any URL.';
  327.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  328.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  329.         if (!info || !info.url)
  330.           throw `Couldn't follow URL: ${url}`;
  331.         Object.assign(ai, info);
  332.         App.startSingle();
  333.       } else {
  334.         Popup.create(url, finalUrl);
  335.         Ruler.runC(responseText, doc);
  336.       }
  337.     } catch (e) {
  338.       App.handleError(e);
  339.     }
  340.   },
  341.  
  342.   async startGallery() {
  343.     Status.loading();
  344.     try {
  345.       const startUrl = ai.url;
  346.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  347.       const items = await new Promise(resolve => {
  348.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  349.           resolve);
  350.         if (Array.isArray(it))
  351.           resolve(it);
  352.       });
  353.       // bail out if the gallery's async callback took too long
  354.       if (ai.url !== startUrl) return;
  355.       ai.gNum = items.length;
  356.       ai.gItems = items.length && items;
  357.       if (ai.gItems) {
  358.         const i = items.index;
  359.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  360.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  361.             Gallery.findIndex(ai.url);
  362.         setTimeout(Gallery.next);
  363.       } else {
  364.         throw 'Empty gallery';
  365.       }
  366.     } catch (e) {
  367.       App.handleError(e);
  368.     }
  369.   },
  370.  
  371.   stopTimers() {
  372.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  373.       clearTimeout(ai[timer]);
  374.     clearInterval(ai.timerProgress);
  375.   },
  376.  
  377.   toggleZoom({keepScale} = {}) {
  378.     const p = ai.popup;
  379.     if (!p || !ai.scales || ai.scales.length < 2)
  380.       return;
  381.     ai.zoomed = !ai.zoomed;
  382.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  383.     if (ai.zooming)
  384.       p.classList.add(`${PREFIX}zooming`);
  385.     Popup.move();
  386.     Bar.updateDetails();
  387.     Status.set(ai.zoomed ? 'zoom' : false);
  388.     return ai.zoomed;
  389.   },
  390.  
  391.   updateStyles() {
  392.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  393.     Util.addStyle('rule', ai.rule.css || '');
  394.   },
  395. };
  396.  
  397. const Bar = {
  398.  
  399.   set(label, className) {
  400.     let b = ai.bar;
  401.     if (typeof label !== 'string') {
  402.       $remove(b);
  403.       ai.bar = null;
  404.       return;
  405.     }
  406.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  407.     App.updateStyles();
  408.     Bar.updateDetails();
  409.     Bar.show();
  410.     b.textContent = '';
  411.     b.innerHTML = TRUSTED.createHTML(label);
  412.     if (!b.parentNode) {
  413.       doc.body.appendChild(b);
  414.       Util.forceLayout(b);
  415.     }
  416.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  417.   },
  418.  
  419.   show(isForced) {
  420.     clearTimeout(ai.timerBar);
  421.     ai.bar.style.removeProperty('opacity');
  422.     if (isForced)
  423.       ai.bar.dataset.force = '';
  424.     else
  425.       ai.timerBar = setTimeout(Bar.hide, 3000);
  426.   },
  427.  
  428.   hide(isForced) {
  429.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  430.       $css(ai.bar, {opacity: 0});
  431.       delete ai.bar.dataset.force;
  432.     }
  433.   },
  434.  
  435.   updateName() {
  436.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  437.     if (gi) {
  438.       const item = gi[i];
  439.       const noDesc = !gi.some(_ => _.desc);
  440.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  441.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  442.         item.desc,
  443.       ].filter(Boolean).join(' - ')}`;
  444.       Bar.set(c.trim() || ' ', 'gallery', true);
  445.     } else if ('caption' in ai) {
  446.       Bar.set(ai.caption, 'caption');
  447.     } else if (ai.tooltip) {
  448.       Bar.set(ai.tooltip.text, 'tooltip');
  449.     } else {
  450.       Bar.set(' ', 'info');
  451.     }
  452.   },
  453.  
  454.   updateDetails() {
  455.     if (!ai.bar) return;
  456.     const r = ai.rotate;
  457.     const zoom = ai.nwidth && `${
  458.       Math.round(ai.scale * 100)
  459.     }%${
  460.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  461.     }${
  462.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  463.     }, ${
  464.       ai.nwidth
  465.     } x ${
  466.       ai.nheight
  467.     } px, ${
  468.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  469.     } MP, ${
  470.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  471.     }`.replace(/\x20/g, '\xA0');
  472.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  473.       if (zoom) ai.bar.dataset.zoom = zoom;
  474.       else delete ai.bar.dataset.zoom;
  475.       Bar.show();
  476.     }
  477.   },
  478. };
  479.  
  480. const Calc = {
  481.  
  482.   aspectRatio(w, h) {
  483.     for (let rat = w / h, a, b = 0; ;) {
  484.       b++;
  485.       a = Math.round(w * b / h);
  486.       if (a > 10 && b > 10 || a > 100 || b > 100)
  487.         return rat.toFixed(2);
  488.       if (Math.abs(a / b - rat) < .01)
  489.         return `${a}:${b}`;
  490.     }
  491.   },
  492.  
  493.   frameSize(elFrame, wnd) {
  494.     if (!elFrame) return;
  495.     const r = elFrame.getBoundingClientRect();
  496.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  497.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  498.     const x = r.left < 0 ? -r.left : 0;
  499.     const y = r.top < 0 ? -r.top : 0;
  500.     return [w, h, x, y];
  501.   },
  502.  
  503.   generateScales(fit) {
  504.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  505.     const zoomStep = cfg.zoomStep / 100;
  506.     const arr = [scale];
  507.     if (fit !== 1) {
  508.       const diff = goal / scale;
  509.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  510.       const step = steps && Math.pow(diff, 1 / steps);
  511.       for (let i = steps; --i > 0;)
  512.         arr.push((scale *= step));
  513.       arr.push(scale = goal);
  514.     }
  515.     while ((scale *= zoomStep) <= ZOOM_MAX)
  516.       arr.push(scale);
  517.     return arr;
  518.   },
  519.  
  520.   measurePopup() {
  521.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  522.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  523.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  524.     if (p.clientWidth > nw) {
  525.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  526.       nh = ai.nheight = w / nw * nh | 0;
  527.       nw = ai.nwidth = w;
  528.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  529.     }
  530.     p.className = `${PREFIX}show`;
  531.     p.removeAttribute('style');
  532.     const s = getComputedStyle(p);
  533.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  534.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  535.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  536.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  537.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  538.     ai.extras = {
  539.       inw, inh,
  540.       outw, outh,
  541.       o: o2 / 2,
  542.       w: inw + outw,
  543.       h: inh + outh,
  544.     };
  545.     const fit = Math.min(
  546.       (ai.view.w - ai.extras.w) / ai.nwidth,
  547.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  548.     const isCustom = !cfg.fit && cfg.scales.length;
  549.     let cutoff = Math.min(1, fit);
  550.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  551.     if (isCustom) {
  552.       const dst = [];
  553.       for (const scale of cfg.scales) {
  554.         const val = parseFloat(scale) || fit;
  555.         dst.push(val);
  556.         if (isCustom && typeof scale === 'string') {
  557.           if (scale.includes('!')) cutoff = val;
  558.           if (scale.includes('*')) scaleZoom = val;
  559.         }
  560.       }
  561.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  562.     } else {
  563.       ai.scales = Calc.generateScales(fit);
  564.     }
  565.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  566.     ai.scaleFit = fit;
  567.     ai.scaleZoom = scaleZoom;
  568.   },
  569.  
  570.   rect() {
  571.     let {node, rule} = ai;
  572.     let n = rule.rect && node.closest(rule.rect);
  573.     if (n) return n.getBoundingClientRect();
  574.     const nested = node.getElementsByTagName('*');
  575.     let maxArea = 0;
  576.     let maxBounds;
  577.     n = node;
  578.     for (let i = 0; n; n = nested[i++]) {
  579.       const bounds = n.getBoundingClientRect();
  580.       const area = bounds.width * bounds.height;
  581.       if (area > maxArea) {
  582.         maxArea = area;
  583.         maxBounds = bounds;
  584.         node = n;
  585.       }
  586.     }
  587.     return maxBounds;
  588.   },
  589.  
  590.   scaleBiggerThan(scale, i, arr) {
  591.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  592.   },
  593.  
  594.   scaleIndex(dir) {
  595.     const i = ai.scales.indexOf(ai.scale);
  596.     if (i >= 0) return i + dir;
  597.     for (
  598.       let len = ai.scales.length,
  599.         i = dir > 0 ? 0 : len - 1;
  600.       i >= 0 && i < len;
  601.       i += dir
  602.     ) {
  603.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  604.         return i;
  605.     }
  606.     return -1;
  607.   },
  608.  
  609.   scaleForFirstZoom(keepScale) {
  610.     const z = ai.scaleZoom;
  611.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  612.   },
  613.  
  614.   updateViewSize() {
  615.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  616.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  617.     if (window === top) return;
  618.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  619.     if (w && h) {
  620.       ai.view = {w, h, x: 0, y: 0};
  621.     } else {
  622.       addEventListener('message', App.onMessageChild, true);
  623.       parent.postMessage(MSG.getViewSize, '*');
  624.     }
  625.   },
  626. };
  627.  
  628. class Config {
  629.  
  630.   constructor({data: c, save}) {
  631.     if (typeof c === 'string')
  632.       c = tryCatch(JSON.parse, c);
  633.     if (typeof c !== 'object' || !c)
  634.       c = {};
  635.     const {DEFAULTS} = Config;
  636.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  637.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  638.         '';
  639.     if (c.version !== DEFAULTS.version) {
  640.       if (typeof c.hosts === 'string')
  641.         c.hosts = c.hosts.split('\n')
  642.           .map(s => tryCatch(JSON.parse, s) || s)
  643.           .filter(Boolean);
  644.       if (c.close === true || c.close === false)
  645.         c.zoomOut = c.close ? 'auto' : 'stay';
  646.       for (const key in DEFAULTS)
  647.         if (typeof c[key] !== typeof DEFAULTS[key])
  648.           c[key] = DEFAULTS[key];
  649.       if (c.version === 3 && c.scales[0] === 0)
  650.         c.scales[0] = '0!';
  651.       for (const key in c)
  652.         if (!(key in DEFAULTS))
  653.           delete c[key];
  654.       c.version = DEFAULTS.version;
  655.       if (save)
  656.         GM.setValue('cfg', c);
  657.     }
  658.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  659.       App.globalStyle = '';
  660.     if (!Array.isArray(c.scales))
  661.       c.scales = [];
  662.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  663.     Object.assign(this, DEFAULTS, c);
  664.   }
  665.  
  666.   static async load(opts) {
  667.     opts.data = await GM.getValue('cfg');
  668.     return new Config(opts);
  669.   }
  670.  
  671.   _getCss() {
  672.     const {css} = this;
  673.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  674.   }
  675. }
  676.  
  677. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  678.   center: false,
  679.   css: '',
  680.   delay: 500,
  681.   fit: '',
  682.   globalStatus: false,
  683.   // prefer ' inside rules because " will be displayed as \"
  684.   // example: "img[src*='icon']"
  685.   hosts: [{
  686.     name: 'No popup for YouTube thumbnails',
  687.     d: 'www.youtube.com',
  688.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  689.     s: '',
  690.   }, {
  691.     name: 'No popup for SVG/PNG icons',
  692.     d: '',
  693.     e: "img[src*='icon']",
  694.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  695.     s: '',
  696.   }],
  697.   imgtab: false,
  698.   mute: false,
  699.   preload: false,
  700.   scale: 1.25,
  701.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  702.   start: 'auto',
  703.   startAlt: 'context',
  704.   startAltShown: false,
  705.   uiBackgroundColor: '#ffffff',
  706.   uiBackgroundOpacity: 100,
  707.   uiBorderColor: '#000000',
  708.   uiBorderOpacity: 100,
  709.   uiBorder: 0,
  710.   uiFadein: true,
  711.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  712.   uiShadowColor: '#000000',
  713.   uiShadowOpacity: 80,
  714.   uiShadow: 20,
  715.   uiPadding: 0,
  716.   uiMargin: 0,
  717.   version: 6,
  718.   waitLoad: false,
  719.   xhr: true,
  720.   zoom: 'context',
  721.   zoomOut: 'auto',
  722.   zoomStep: 133,
  723. });
  724.  
  725. const CspSniffer = {
  726.  
  727.   /** @type {?Object<string,string[]>} */
  728.   csp: null,
  729.   selfUrl: location.origin + '/',
  730.  
  731.   // will be null when done
  732.   init() {
  733.     this.init = location.protocol === 'https:' && new Promise(resolve => {
  734.       const xhr = GM.xmlHttpRequest({
  735.         url: location.href,
  736.         method: 'get',
  737.         onprogress: ({responseHeaders: rh}) => {
  738.           if (rh && this.init) {
  739.             this.csp = this._parse(rh.match(/^\s*Content-Security-Policy:\s*(.+)/mi));
  740.             this.init = null;
  741.             if (xhr) xhr.abort();
  742.             resolve();
  743.           }
  744.         },
  745.       });
  746.     });
  747.   },
  748.  
  749.   async check(url) {
  750.     if (this.init) await this.init;
  751.     const isVideo = Util.isVideoUrl(url);
  752.     let mode;
  753.     if (this.csp) {
  754.       const src = this.csp[isVideo ? 'media' : 'img'];
  755.       if (!src.some(this._srcMatches, url))
  756.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  757.     }
  758.     return [mode || ai.xhr, isVideo];
  759.   },
  760.  
  761.   _parse(csp) {
  762.     if (!csp) return;
  763.     const src = {};
  764.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  765.     for (let m; (m = rx.exec(csp));)
  766.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  767.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  768.       nonce = RegExp.$1;
  769.     if ((src.trusted || []).includes("'script'"))
  770.       App.NOP = () => {};
  771.     if (!src.img) src.img = src.default || [];
  772.     if (!src.media) src.media = src.default || [];
  773.     for (const set of [src.img, src.media]) {
  774.       set.forEach((item, i) => {
  775.         if (item !== '*' && item.includes('*')) {
  776.           set[i] = new RegExp(
  777.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  778.             item
  779.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  780.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  781.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  782.             .replace(/[^/]$/, '$&/'));
  783.         }
  784.       });
  785.     }
  786.     return src;
  787.   },
  788.  
  789.   /** @this string */
  790.   _srcMatches(src) {
  791.     return src instanceof RegExp ? src.test(this) :
  792.       src === '*' ||
  793.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  794.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  795.   },
  796. };
  797.  
  798. const Events = {
  799.  
  800.   hoverData: null,
  801.   hoverTimer: 0,
  802.   ignoreKeyHeld: false,
  803.  
  804.   onMouseOver(e) {
  805.     let node = e.target;
  806.     Events.ignoreKeyHeld = e.shiftKey;
  807.     if (!App.isEnabled ||
  808.         e.shiftKey ||
  809.         ai.zoomed ||
  810.         node === ai.popup ||
  811.         node === doc.body ||
  812.         node === doc.documentElement ||
  813.         node === elConfig ||
  814.         ai.gallery && ai.rectHovered)
  815.       return;
  816.     if (node.shadowRoot)
  817.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  818.     // we don't want to process everything in the path of a quickly moving mouse cursor
  819.     Events.hoverData = {e, node, start: now()};
  820.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  821.   },
  822.  
  823.   onMouseOverThrottled(force) {
  824.     if (!Events.hoverData)
  825.       return;
  826.     const {start, e, node} = Events.hoverData;
  827.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  828.     const wait = force ? 0 : start + SETTLE_TIME - now();
  829.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  830.     if (Events.hoverTimer || !Util.isHovered(node))
  831.       return;
  832.     Events.hoverData = null;
  833.     if (!Ruler.rules)
  834.       Ruler.init();
  835.     const info = RuleMatcher.adaptiveFind(node);
  836.     if (info && info.url && info.node !== ai.node)
  837.       App.activate(info, e);
  838.   },
  839.  
  840.   onMouseOut(e) {
  841.     if (!e.relatedTarget && !e.shiftKey)
  842.       App.deactivate();
  843.   },
  844.  
  845.   onMouseOutShadow(e) {
  846.     const root = e.target.shadowRoot;
  847.     if (root) {
  848.       root.removeEventListener('mouseover', Events.onMouseOver);
  849.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  850.     }
  851.   },
  852.  
  853.   onMouseMove(e) {
  854.     Events.trackMouse(e);
  855.     if (e.shiftKey)
  856.       return;
  857.     if (!ai.zoomed && !ai.rectHovered) {
  858.       App.deactivate();
  859.     } else if (ai.zoomed) {
  860.       Popup.move();
  861.       const {cx, cy, view: {w, h}} = ai;
  862.       const bx = w / 6;
  863.       const by = h / 6;
  864.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  865.       Status.set(`${onEdge ? '+' : '-'}edge`);
  866.     }
  867.   },
  868.  
  869.   onMouseDown({shiftKey, button}) {
  870.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  871.       ai.controlled = ai.zoomed = true;
  872.     } else if (button === 2 || shiftKey) {
  873.       // Shift = ignore; RMB will be processed in onContext
  874.     } else {
  875.       App.deactivate({wait: true});
  876.       doc.addEventListener('mouseup', App.enable, {once: true});
  877.     }
  878.   },
  879.  
  880.   onMouseScroll(e) {
  881.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  882.     if (ai.zoomed) {
  883.       Events.zoomInOut(dir);
  884.     } else if (ai.gNum > 1 && ai.popup) {
  885.       Gallery.next(-dir);
  886.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  887.       App.toggleZoom();
  888.     } else {
  889.       App.deactivate();
  890.       return;
  891.     }
  892.     dropEvent(e);
  893.   },
  894.  
  895.   onKeyDown(e) {
  896.     // Synthesized events may be of the wrong type and not have a `key`
  897.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  898.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  899.     if (!p &&
  900.         !Events.ignoreKeyHeld &&
  901.         key === '^Control' &&
  902.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  903.       dropEvent(e);
  904.       if (Events.hoverData) {
  905.         Events.hoverData.e = e;
  906.         Events.onMouseOverThrottled(true);
  907.       }
  908.       if (ai.node) {
  909.         ai.force = true;
  910.         App.start();
  911.       }
  912.     }
  913.     if (!p || e.repeat)
  914.       return;
  915.     switch (key) {
  916.       case '+Shift':
  917.         if (ai.shiftKeyTime)
  918.           return;
  919.         ai.shiftKeyTime = now();
  920.         Status.set('+shift');
  921.         Bar.show(true);
  922.         if (p.tagName === 'VIDEO')
  923.           p.controls = true;
  924.         return;
  925.       case 'KeyA':
  926.         if (!p.hasAttribute('data-no-aa'))
  927.           p.setAttribute('data-no-aa', '');
  928.         else
  929.           p.removeAttribute('data-no-aa');
  930.         break;
  931.       case 'ArrowRight':
  932.       case 'KeyJ':
  933.         Gallery.next(1);
  934.         break;
  935.       case 'ArrowLeft':
  936.       case 'KeyK':
  937.         Gallery.next(-1);
  938.         break;
  939.       case 'KeyD':
  940.         Remoting.saveFile();
  941.         break;
  942.       case 'KeyH': // flip horizontally
  943.       case 'KeyV': // flip vertically
  944.       case 'KeyL': // rotate left
  945.       case 'KeyR': // rotate right
  946.         if (!p)
  947.           return;
  948.         if (key === 'KeyH' || key === 'KeyV') {
  949.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  950.           ai[side] = !ai[side];
  951.         } else {
  952.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  953.         }
  954.         Bar.updateDetails();
  955.         Popup.move();
  956.         break;
  957.       case 'KeyM':
  958.         if (p.tagName === 'VIDEO')
  959.           p.muted = !p.muted;
  960.         break;
  961.       case 'KeyT':
  962.         GM.openInTab(Util.tabFixUrl() || p.src);
  963.         App.deactivate();
  964.         break;
  965.       case 'Minus':
  966.       case 'NumpadSubtract':
  967.         if (ai.zoomed) {
  968.           Events.zoomInOut(-1);
  969.         } else {
  970.           App.toggleZoom();
  971.         }
  972.         break;
  973.       case 'Equal':
  974.       case 'NumpadAdd':
  975.         if (ai.zoomed) {
  976.           Events.zoomInOut(1);
  977.         } else {
  978.           App.toggleZoom();
  979.         }
  980.         break;
  981.       case 'Escape':
  982.         App.deactivate({wait: true});
  983.         break;
  984.       case '!Alt':
  985.         return;
  986.       default:
  987.         App.deactivate({wait: true});
  988.         return;
  989.     }
  990.     dropEvent(e);
  991.   },
  992.  
  993.   onKeyUp(e) {
  994.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  995.       Status.set('-shift');
  996.       Bar.hide(true);
  997.       if ((ai.popup || {}).controls)
  998.         ai.popup.controls = false;
  999.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1000.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1001.         ai.controlled = false;
  1002.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  1003.         App.toggleZoom();
  1004.       else
  1005.         App.deactivate({wait: true});
  1006.       ai.shiftKeyTime = 0;
  1007.     }
  1008.   },
  1009.  
  1010.   onContext(e) {
  1011.     if (Events.ignoreKeyHeld)
  1012.       return;
  1013.     const p = ai.popup;
  1014.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1015.       dropEvent(e);
  1016.     } else if (!p && (
  1017.       cfg.start === 'context' ||
  1018.       cfg.start === 'contextMK' ||
  1019.       cfg.start === 'contextM' && (e.button === 2) ||
  1020.       cfg.start === 'contextK' && (e.button !== 2) ||
  1021.       (cfg.start === 'auto' && ai.rule.manual)
  1022.     )) {
  1023.       // right-clicked on an image while the context menu is shown for something else
  1024.       if (!ai.node && !Events.hoverData)
  1025.         Events.onMouseOver(e);
  1026.       Events.onMouseOverThrottled(true);
  1027.       if (ai.node) {
  1028.         ai.force = true;
  1029.         App.start();
  1030.         dropEvent(e);
  1031.       }
  1032.     } else if (p) {
  1033.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1034.     }
  1035.   },
  1036.  
  1037.   pierceShadow(node, x, y) {
  1038.     for (let root; (root = node.shadowRoot);) {
  1039.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1040.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1041.       const inner = root.elementFromPoint(x, y);
  1042.       if (!inner || inner === node)
  1043.         break;
  1044.       node = inner;
  1045.     }
  1046.     return node;
  1047.   },
  1048.  
  1049.   toggle(enable) {
  1050.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1051.     const passive = {passive: true, capture: true};
  1052.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1053.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1054.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1055.     window[onOff]('keydown', Events.onKeyDown, true); // override normal page listeners
  1056.     window[onOff]('keyup', Events.onKeyUp, true);
  1057.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false});
  1058.   },
  1059.  
  1060.   trackMouse(e) {
  1061.     const cx = ai.cx = e.clientX;
  1062.     const cy = ai.cy = e.clientY;
  1063.     const r = ai.rect || (ai.rect = Calc.rect());
  1064.     ai.rectHovered =
  1065.       cx > r.left - 2 && cx < r.right + 2 &&
  1066.       cy > r.top - 2 && cy < r.bottom + 2;
  1067.   },
  1068.  
  1069.   zoomInOut(dir) {
  1070.     const i = Calc.scaleIndex(dir);
  1071.     const n = ai.scales.length;
  1072.     if (i >= 0 && i < n)
  1073.       ai.scale = ai.scales[i];
  1074.     const zo = cfg.zoomOut;
  1075.     if (i <= 0 && zo !== 'stay') {
  1076.       if (ai.scaleFit < ai.scale * .99) {
  1077.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1078.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1079.         App.deactivate({wait: true});
  1080.         return;
  1081.       }
  1082.       ai.zoomed = zo !== 'unzoom';
  1083.     } else {
  1084.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1085.     }
  1086.     if (ai.zooming)
  1087.       ai.popup.classList.add(`${PREFIX}zooming`);
  1088.     Popup.move();
  1089.     Bar.updateDetails();
  1090.   },
  1091. };
  1092.  
  1093. const Gallery = {
  1094.  
  1095.   makeParser(g) {
  1096.     return isFunction(g) ? g : Gallery.defaultParser;
  1097.   },
  1098.  
  1099.   findIndex(gUrl) {
  1100.     const sel = gUrl.split('#')[1];
  1101.     if (!sel)
  1102.       return 0;
  1103.     if (/^\d+$/.test(sel))
  1104.       return parseInt(sel);
  1105.     for (let i = ai.gNum; i--;) {
  1106.       let {url} = ai.gItems[i];
  1107.       if (Array.isArray(url))
  1108.         url = url[0];
  1109.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1110.         return i;
  1111.     }
  1112.     return 0;
  1113.   },
  1114.  
  1115.   next(dir) {
  1116.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1117.     const item = ai.gItems[ai.gIndex];
  1118.     if (Array.isArray(item.url)) {
  1119.       ai.urls = item.url.slice(1);
  1120.       ai.url = item.url[0];
  1121.     } else {
  1122.       ai.urls = null;
  1123.       ai.url = item.url;
  1124.     }
  1125.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1126.     App.startSingle();
  1127.     Bar.updateName();
  1128.   },
  1129.  
  1130.   nextIndex(dir) {
  1131.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1132.   },
  1133.  
  1134.   defaultParser(text, doc, docUrl, m, rule) {
  1135.     const {g} = rule;
  1136.     const qEntry = g.entry;
  1137.     const qCaption = ensureArray(g.caption);
  1138.     const qImage = g.image || 'img';
  1139.     const qTitle = g.title;
  1140.     const fix =
  1141.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1142.       (s => s.trim());
  1143.     const items = [...$$(qEntry || qImage, doc)]
  1144.       .map(processEntry)
  1145.       .filter(Boolean);
  1146.     items.title = processTitle();
  1147.     items.index =
  1148.       typeof g.index === 'string' &&
  1149.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1150.       RX_HAS_CODE.test(g.index) &&
  1151.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1152.       g.index;
  1153.     return items;
  1154.  
  1155.     function processEntry(entry) {
  1156.       const item = {};
  1157.       try {
  1158.         const img = qEntry ? $(qImage, entry) : entry;
  1159.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1160.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1161.       } catch (e) {}
  1162.       return item.url && item;
  1163.     }
  1164.  
  1165.     function processCaption(selector) {
  1166.       const el = $(selector, this) ||
  1167.                  $orSelf(selector, this.previousElementSibling) ||
  1168.                  $orSelf(selector, this.nextElementSibling);
  1169.       return el && fix(el.textContent);
  1170.     }
  1171.  
  1172.     function processTitle() {
  1173.       const el = $(qTitle, doc);
  1174.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1175.     }
  1176.  
  1177.     function $orSelf(selector, el) {
  1178.       if (el && !el.matches(qEntry))
  1179.         return el.matches(selector) ? el : $(selector, el);
  1180.     }
  1181.   },
  1182. };
  1183.  
  1184. const Menu = window === top && GM.registerMenuCommand && {
  1185.   curAltName: '',
  1186.   unreg: GM.unregisterMenuCommand,
  1187.   makeAltName: () => Menu.unreg
  1188.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1189.     : 'MPIV: toggle auto-start',
  1190.   register() {
  1191.     GM.registerMenuCommand('MPIV: configure', setup);
  1192.     Menu.registerAlt();
  1193.   },
  1194.   registerAlt() {
  1195.     if (cfg.startAltShown) {
  1196.       Menu.curAltName = Menu.makeAltName();
  1197.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1198.     }
  1199.   },
  1200.   reRegisterAlt() {
  1201.     const old = Menu.curAltName;
  1202.     if (old && Menu.unreg) Menu.unreg(old);
  1203.     if (!old || Menu.unreg) Menu.registerAlt();
  1204.   },
  1205.   onAltToggled() {
  1206.     const wasAuto = cfg.start === 'auto';
  1207.     if (wasAuto) {
  1208.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1209.     } else {
  1210.       cfg.startAlt = cfg.start;
  1211.       cfg.start = 'auto';
  1212.     }
  1213.     Menu.reRegisterAlt();
  1214.   },
  1215. };
  1216.  
  1217. const Popup = {
  1218.  
  1219.   async create(src, pageUrl) {
  1220.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1221.       (ai.popup.dataset.galleryFlip = '') === '';
  1222.     Popup.destroy();
  1223.     ai.imageUrl = src;
  1224.     if (!src)
  1225.       return;
  1226.     const myAi = ai;
  1227.     let [xhr, isVideo] = await CspSniffer.check(src);
  1228.     if (ai !== myAi)
  1229.       return;
  1230.     if (xhr)
  1231.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1232.     if (ai !== myAi || !src)
  1233.       return;
  1234.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1235.     p.id = `${PREFIX}popup`;
  1236.     p.src = src;
  1237.     p.addEventListener('error', App.handleError);
  1238.     if (ai.zooming)
  1239.       p.addEventListener('transitionend', Popup.onZoom);
  1240.     if (inGallery) {
  1241.       p.dataset.galleryFlip = '';
  1242.       p.setAttribute('loaded', '');
  1243.     }
  1244.     doc.body.insertBefore(p, ai.bar || undefined);
  1245.     await 0;
  1246.     if (App.checkProgress({start: true}) === false)
  1247.       return;
  1248.     if (p.complete)
  1249.       Popup.onLoad.call(ai.popup);
  1250.     else if (!isVideo)
  1251.       p.addEventListener('load', Popup.onLoad, {once: true});
  1252.   },
  1253.  
  1254.   destroy() {
  1255.     const p = ai.popup;
  1256.     if (!p) return;
  1257.     p.removeEventListener('load', Popup.onLoad);
  1258.     p.removeEventListener('error', App.handleError);
  1259.     if (isFunction(p.pause))
  1260.       p.pause();
  1261.     if (ai.blobUrl)
  1262.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1263.     p.remove();
  1264.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1265.   },
  1266.  
  1267.   move() {
  1268.     let x, y;
  1269.     const {cx, cy, extras, view} = ai;
  1270.     const vw = view.w - extras.outw;
  1271.     const vh = view.h - extras.outh;
  1272.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1273.     const h0 = ai.scale * ai.nheight + extras.inh;
  1274.     const isSwapped = ai.rotate % 180;
  1275.     const w = isSwapped ? h0 : w0;
  1276.     const h = isSwapped ? w0 : h0;
  1277.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1278.       const r = ai.rect;
  1279.       const rx = (r.left + r.right) / 2;
  1280.       const ry = (r.top + r.bottom) / 2;
  1281.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1282.         if (h < vh - 60)
  1283.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1284.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1285.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1286.         if (w < vw - 60)
  1287.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1288.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1289.       }
  1290.     }
  1291.     if (x == null) {
  1292.       x = vw > w
  1293.         ? (vw - w) / 2 + view.x
  1294.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1295.     }
  1296.     if (y == null) {
  1297.       y = vh > h
  1298.         ? (vh - h) / 2 + view.y
  1299.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1300.     }
  1301.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1302.     x += extras.o - diff;
  1303.     y += extras.o + diff;
  1304.     $css(ai.popup, {
  1305.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1306.                  `rotate(${ai.rotate || 0}deg) ` +
  1307.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1308.       width: `${Math.round(w0)}px`,
  1309.       height: `${Math.round(h0)}px`,
  1310.     });
  1311.   },
  1312.  
  1313.   onLoad() {
  1314.     if (this === ai.popup) {
  1315.       this.setAttribute('loaded', '');
  1316.       ai.popupLoaded = true;
  1317.       Status.set('-loading');
  1318.       if (ai.preloadUrl) {
  1319.         $create('img', {src: ai.preloadUrl});
  1320.         ai.preloadUrl = null;
  1321.       }
  1322.     }
  1323.   },
  1324.  
  1325.   onZoom() {
  1326.     this.classList.remove(`${PREFIX}zooming`);
  1327.   },
  1328. };
  1329.  
  1330. const PopupVideo = {
  1331.   async create() {
  1332.     ai.bufBar = false;
  1333.     ai.bufStart = now();
  1334.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1335.     return $create('video', {
  1336.       autoplay: true,
  1337.       controls: shouldMute,
  1338.       muted: shouldMute,
  1339.       loop: true,
  1340.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1341.       onprogress: PopupVideo.progress,
  1342.       oncanplaythrough: PopupVideo.progressDone,
  1343.       onvolumechange: PopupVideo.rememberVolume,
  1344.     });
  1345.   },
  1346.  
  1347.   progress() {
  1348.     const {duration} = this;
  1349.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1350.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1351.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1352.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1353.     }
  1354.   },
  1355.  
  1356.   progressDone() {
  1357.     this.onprogress = this.oncanplaythrough = null;
  1358.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1359.       Bar.set(false);
  1360.     Popup.onLoad.call(this);
  1361.   },
  1362.  
  1363.   rememberVolume() {
  1364.     GM.setValue('volume', this.volume);
  1365.   },
  1366. };
  1367.  
  1368. const Ruler = {
  1369. /*
  1370.  'u' works only with URLs so it's ignored if 'html' is true
  1371.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1372.    |foo = url or text must start with foo
  1373.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1374.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1375.  'r' is checked only if 'u' matches first
  1376. */
  1377.   init() {
  1378.     const errors = new Map();
  1379.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1380.     const hasGMAE = typeof GM_addElement === 'function';
  1381.     const canEval = nonce || hasGMAE;
  1382.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1383.     const evalRules = [];
  1384.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1385.     for (const [rule, err] of errors.entries()) {
  1386.       if (!RX_EVAL_BLOCKED.test(err)) {
  1387.         App.handleError('Invalid custom host rule:', rule);
  1388.         continue;
  1389.       }
  1390.       if (canEval) {
  1391.         evalCode.push(evalRules.length ? ',' : '',
  1392.           '[', customRules.indexOf(rule), ',{',
  1393.           ...Object.keys(FN_ARGS)
  1394.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1395.             .filter(Boolean),
  1396.           '}]');
  1397.       }
  1398.       evalRules.push(rule);
  1399.     }
  1400.     if (evalRules.length) {
  1401.       let result, wnd;
  1402.       if (canEval) {
  1403.         const GMAE = hasGMAE
  1404.           ? GM_addElement // eslint-disable-line no-undef
  1405.           : (tag, {textContent}) => document.head.appendChild(
  1406.             Object.assign(document.createElement(tag), {
  1407.               textContent: TRUSTED.createScript(textContent),
  1408.               nonce,
  1409.             }));
  1410.         evalCode.push(']; document.currentScript.remove();');
  1411.         GMAE('script', {textContent: evalCode.join('')});
  1412.         result = (wnd = unsafeWindow)[evalId] ||
  1413.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1414.       }
  1415.       if (result) {
  1416.         for (const [index, fns] of result) {
  1417.           Object.assign(customRules[index], fns);
  1418.         }
  1419.         delete wnd[evalId];
  1420.       } else {
  1421.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1422.       }
  1423.     }
  1424.  
  1425.     // rules that disable previewing
  1426.     const disablers = [
  1427.       dotDomain.endsWith('.stackoverflow.com') && {
  1428.         e: '.post-tag, .post-tag img',
  1429.         s: '',
  1430.       },
  1431.       {
  1432.         u: '||disqus.com/',
  1433.         s: '',
  1434.       },
  1435.     ];
  1436.  
  1437.     // optimization: a rule is created only when on domain
  1438.     const perDomain = [
  1439.       hostname.includes('startpage') && {
  1440.         r: /\boiu=(.+)/,
  1441.         s: '$1',
  1442.         follow: true,
  1443.       },
  1444.       dotDomain.endsWith('.4chan.org') && {
  1445.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1446.         q: '.op .fileText a',
  1447.         css: '#post-preview{display:none}',
  1448.       },
  1449.       hostname.includes('amazon.') && {
  1450.         r: /.+?images\/I\/.+?\./,
  1451.         s: m => {
  1452.           const uh = doc.getElementById('universal-hover');
  1453.           return uh ? '' : m[0] + 'jpg';
  1454.         },
  1455.         css: '#zoomWindow{display:none!important;}',
  1456.       },
  1457.       dotDomain.endsWith('.bing.com') && {
  1458.         e: 'a[m*="murl"]',
  1459.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1460.         s: '$1',
  1461.         html: true,
  1462.       },
  1463.       ...dotDomain.endsWith('.deviantart.com') && [{
  1464.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1465.         s: (m, node) =>
  1466.           $propUp(node, 'data-super-full-img') ||
  1467.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1468.           node.dataset.embedId && node.src,
  1469.       }, {
  1470.         e: '.dev-view-deviation img',
  1471.         s: () => [
  1472.           $('.dev-page-download').href,
  1473.           $('.dev-content-full').src,
  1474.         ].filter(Boolean),
  1475.       }, {
  1476.         e: 'a[data-hook=deviation_link]',
  1477.         q: 'link[as=image]',
  1478.       }] || [],
  1479.       dotDomain.endsWith('.discord.com') && {
  1480.         u: '||discordapp.net/external/',
  1481.         r: /\/https?\/(.+)/,
  1482.         s: '//$1',
  1483.         follow: true,
  1484.       },
  1485.       dotDomain.endsWith('.dropbox.com') && {
  1486.         r: /(.+?&size_mode)=\d+(.*)/,
  1487.         s: '$1=5$2',
  1488.       },
  1489.       dotDomain.endsWith('.facebook.com') && {
  1490.         e: 'a[href*="ref=hovercard"]',
  1491.         s: (m, node) =>
  1492.           'https://www.facebook.com/photo.php?fbid=' +
  1493.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1494.         follow: true,
  1495.       },
  1496.       dotDomain.endsWith('.facebook.com') && {
  1497.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1498.         s: (m, node) =>
  1499.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1500.             decodeURIComponent(m[4]),
  1501.         html: true,
  1502.         follow: true,
  1503.       },
  1504.       dotDomain.endsWith('.flickr.com') &&
  1505.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1506.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1507.         s: m => `https://www.flickr.com/services/rest/?${
  1508.           new URLSearchParams({
  1509.             photo_id: m[1],
  1510.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1511.             method: 'flickr.photos.getSizes',
  1512.             format: 'json',
  1513.             nojsoncallback: 1,
  1514.           }).toString()}`,
  1515.         q: text => JSON.parse(text).sizes.size.pop().source,
  1516.         anonymous: true,
  1517.       },
  1518.       dotDomain.endsWith('.github.com') && {
  1519.         r: new RegExp([
  1520.           /(avatars.+?&s=)\d+/,
  1521.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1522.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1523.         ].map(rx => rx.source).join('|')),
  1524.         s: m => `https://${
  1525.           m[1] ? `${m[1]}460` :
  1526.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1527.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1528.         }`,
  1529.       },
  1530.       isGoogleImages && {
  1531.         e: 'a[href*="imgres?imgurl="] img',
  1532.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1533.         follow: true,
  1534.       },
  1535.       isGoogleImages && {
  1536.         e: '[data-tbnid] a:not([href])',
  1537.         s: (m, a) => {
  1538.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1539.           new MutationObserver((_, mo) => {
  1540.             mo.disconnect();
  1541.             App.isEnabled = true;
  1542.             a.alt = a2.innerText;
  1543.             const {left, top} = a.getBoundingClientRect();
  1544.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1545.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1546.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1547.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1548.         },
  1549.       },
  1550.       dotDomain.endsWith('.instagram.com') && {
  1551.         e: 'a[href*="/p/"],' +
  1552.           'article [role="button"][tabindex="0"],' +
  1553.           'article [role="button"][tabindex="0"] div',
  1554.         s: (m, node, rule) => {
  1555.           let data, a, n, img, src;
  1556.           if (location.pathname.startsWith('/p/')) {
  1557.             img = $('img[srcset], video', node.parentNode);
  1558.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1559.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1560.           }
  1561.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1562.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1563.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1564.           }
  1565.           const numPics = a && tryCatch(() => data.edge_sidecar_to_children.edges.length);
  1566.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1567.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1568.           rule.follow = !data && !rule.g;
  1569.           rule._data = data;
  1570.           rule._img = img;
  1571.           return (
  1572.             !a && !src ? false :
  1573.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1574.                 data.video_url || data.display_url);
  1575.         },
  1576.         c: (html, doc, node, rule) =>
  1577.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1578.         follow: true,
  1579.         _q: 'meta[property="og:video"]',
  1580.         _g(text, doc, url, m, rule) {
  1581.           const media = JSON.parse(text).graphql.shortcode_media;
  1582.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1583.             url: e.node.video_url || e.node.display_url,
  1584.           }));
  1585.           items.title = tryCatch(rule._getCaption, media) || '';
  1586.           return items;
  1587.         },
  1588.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1589.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1590.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1591.       },
  1592.       ...dotDomain.endsWith('.reddit.com') && [{
  1593.         u: '||i.reddituploads.com/',
  1594.       }, {
  1595.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1596.         s: (m, node) => $propUp(node, 'data-url'),
  1597.       }, {
  1598.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1599.         s: 'https://i$1',
  1600.       }] || [],
  1601.       dotDomain.endsWith('.tumblr.com') && {
  1602.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1603.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1604.         follow: true,
  1605.       },
  1606.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1607.         e: 'a.media-item, a.js-media-image-link',
  1608.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1609.         follow: true,
  1610.       },
  1611.       dotDomain.endsWith('.twitter.com') && {
  1612.         e: '.grid-tweet > .media-overlay',
  1613.         s: (m, node) => node.previousElementSibling.src,
  1614.         follow: true,
  1615.       },
  1616.     ];
  1617.  
  1618.     const main = [
  1619.       {
  1620.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1621.         s: '$1',
  1622.         follow: true,
  1623.         onerror: 'skip',
  1624.       },
  1625.       {
  1626.         u: [
  1627.           '||500px.com/photo/',
  1628.           '||cl.ly/',
  1629.           '||cweb-pix.com/',
  1630.           '//ibb.co/',
  1631.           '||imgcredit.xyz/image/',
  1632.         ],
  1633.         r: /\.\w+\/.+/,
  1634.         q: 'meta[property="og:image"]',
  1635.       },
  1636.       {
  1637.         u: 'attachment.php',
  1638.         r: /attachment\.php.+attachmentid/,
  1639.       },
  1640.       {
  1641.         u: '||abload.de/image',
  1642.         q: '#image',
  1643.       },
  1644.       {
  1645.         u: '||deviantart.com/art/',
  1646.         s: (m, node) =>
  1647.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1648.             '' :
  1649.             m.input,
  1650.         q: [
  1651.           '#download-button[href*=".jpg"]',
  1652.           '#download-button[href*=".jpeg"]',
  1653.           '#download-button[href*=".gif"]',
  1654.           '#download-button[href*=".png"]',
  1655.           '#gmi-ResViewSizer_fullimg',
  1656.           'img.dev-content-full',
  1657.         ],
  1658.       },
  1659.       {
  1660.         u: '||dropbox.com/s',
  1661.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1662.         q: (text, doc) =>
  1663.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1664.       },
  1665.       {
  1666.         r: /[./]ebay\.[^/]+\/itm\//,
  1667.         q: text =>
  1668.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1669.             .replace(/~~60_\d+/, '~~60_57'),
  1670.       },
  1671.       {
  1672.         u: '||i.ebayimg.com/',
  1673.         s: (m, node) =>
  1674.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1675.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1676.       },
  1677.       {
  1678.         u: '||fastpic.',
  1679.         e: 'a[href*="fastpic"][href*=".html"]',
  1680.         s: m => m[0].replace('http:', 'https:').replace('fastpic.ru', 'fastpic.org'),
  1681.         q: 'img[src*="/big/"]',
  1682.       },
  1683.       {
  1684.         u: '||facebook.com/',
  1685.         r: /photo\.php|[^/]+\/photos\//,
  1686.         s: (m, node) =>
  1687.           node.id === 'fbPhotoImage' ? false :
  1688.             /gradient\.png$/.test(m.input) ? '' :
  1689.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1690.         q: [
  1691.           'div + span > a:first-child:not([href*="tag_faces"])',
  1692.           'div + span > a[href*="tag_faces"] ~ a',
  1693.         ],
  1694.         rect: '#fbProfileCover',
  1695.       },
  1696.       {
  1697.         u: '||fbcdn.',
  1698.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1699.         s: m =>
  1700.           dotDomain.endsWith('.facebook.com') &&
  1701.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1702.           false,
  1703.         manual: true,
  1704.       },
  1705.       {
  1706.         u: ['||fbcdn-', 'fbcdn.net/'],
  1707.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1708.         s: (m, node) => {
  1709.           if (node.id === 'fbPhotoImage') {
  1710.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1711.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1712.           }
  1713.           if (m[4])
  1714.             return false;
  1715.           const pn = node.parentNode;
  1716.           if (pn.outerHTML.includes('/hovercard/'))
  1717.             return '';
  1718.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1719.             return false;
  1720.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1721.         },
  1722.         rect: '.photoWrap',
  1723.       },
  1724.       {
  1725.         u: '||flickr.com/photos/',
  1726.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1727.         s: m =>
  1728.           m.input.indexOf('/sizes/') < 0 ?
  1729.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1730.             false,
  1731.         q: (text, doc) => {
  1732.           const links = $$('.sizes-list a', doc);
  1733.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1734.         },
  1735.         follow: true,
  1736.       },
  1737.       {
  1738.         u: '||flickr.com/photos/',
  1739.         r: /\/sizes\//,
  1740.         q: '#allsizes-photo > img',
  1741.       },
  1742.       {
  1743.         u: '||gfycat.com/',
  1744.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1745.         s: 'https://$1$3',
  1746.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1747.       },
  1748.       {
  1749.         u: [
  1750.           '||googleusercontent.com/proxy',
  1751.           '||googleusercontent.com/gadgets/proxy',
  1752.         ],
  1753.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1754.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1755.       },
  1756.       {
  1757.         u: [
  1758.           '||googleusercontent.com/',
  1759.           '||ggpht.com/',
  1760.         ],
  1761.         s: m => m.input.includes('webcache.') ? '' :
  1762.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1763.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1764.       },
  1765.       {
  1766.         u: '||gravatar.com/',
  1767.         r: /([a-z0-9]{32})/,
  1768.         s: 'https://gravatar.com/avatar/$1?s=200',
  1769.       },
  1770.       {
  1771.         u: '//gyazo.com/',
  1772.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1773.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1774.         _q: 'meta[name="twitter:image"]',
  1775.       },
  1776.       {
  1777.         u: '||hostingkartinok.com/show-image.php',
  1778.         q: '.image img',
  1779.       },
  1780.       {
  1781.         u: [
  1782.           '||imagecurl.com/images/',
  1783.           '||imagecurl.com/viewer.php',
  1784.         ],
  1785.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1786.         s: 'https://imagecurl.com/images/$1$2$3',
  1787.       },
  1788.       {
  1789.         u: '||imagebam.com/image/',
  1790.         q: 'meta[property="og:image"]',
  1791.         tabfix: true,
  1792.         xhr: hostname.includes('planetsuzy'),
  1793.       },
  1794.       {
  1795.         u: '||imageban.ru/thumbs',
  1796.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1797.         s: '$1out$2/$3/$4',
  1798.       },
  1799.       {
  1800.         u: [
  1801.           '||imageban.ru/show',
  1802.           '||imageban.net/show',
  1803.           '||ibn.im/',
  1804.         ],
  1805.         q: '#img_main',
  1806.       },
  1807.       {
  1808.         u: '||imageshack.us/img',
  1809.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1810.         s: 'https://$2/download/$1/$3$4',
  1811.       },
  1812.       {
  1813.         u: '||imageshack.us/i/',
  1814.         q: '#share-dl',
  1815.       },
  1816.       {
  1817.         u: '||imageteam.org/img',
  1818.         q: 'img[alt="image"]',
  1819.       },
  1820.       {
  1821.         u: [
  1822.           '||imagetwist.com/',
  1823.           '||imageshimage.com/',
  1824.         ],
  1825.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1826.         q: 'img.pic',
  1827.         xhr: true,
  1828.       },
  1829.       {
  1830.         u: '||imageupper.com/i/',
  1831.         q: '#img',
  1832.         xhr: true,
  1833.       },
  1834.       {
  1835.         u: '||imagevenue.com/',
  1836.         q: 'a[data-toggle="full"] img',
  1837.       },
  1838.       {
  1839.         u: '||imagezilla.net/show/',
  1840.         q: '#photo',
  1841.         xhr: true,
  1842.       },
  1843.       {
  1844.         u: [
  1845.           '||images-na.ssl-images-amazon.com/images/',
  1846.           '||media-imdb.com/images/',
  1847.         ],
  1848.         r: /images\/.+?\.jpg/,
  1849.         s: '/V1\\.?_.+?\\.//g',
  1850.       },
  1851.       {
  1852.         u: '||imgbox.com/',
  1853.         r: /\.com\/([a-z0-9]+)$/i,
  1854.         q: '#img',
  1855.         xhr: hostname !== 'imgbox.com',
  1856.       },
  1857.       {
  1858.         u: '||imgclick.net/',
  1859.         r: /\.net\/(\w+)/,
  1860.         q: 'img.pic',
  1861.         xhr: true,
  1862.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1863.       },
  1864.       {
  1865.         u: '.imgcredit.xyz/',
  1866.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1867.         s: ['https$1$2', 'https$1.png'],
  1868.       },
  1869.       {
  1870.         u: [
  1871.           '||imgflip.com/i/',
  1872.           '||imgflip.com/gif/',
  1873.         ],
  1874.         r: /\/(i|gif)\/([^/?#]+)/,
  1875.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1876.       },
  1877.       {
  1878.         u: [
  1879.           '||imgur.com/a/',
  1880.           '||imgur.com/gallery/',
  1881.         ],
  1882.         g: async (text, doc, url, m, rule, node, cb) => {
  1883.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1884.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1885.           const images = ((info || 0).data || 0).images;
  1886.           const items = [];
  1887.           for (const img of images || []) {
  1888.             u = `https://i.imgur.com/${img.hash}`;
  1889.             items.push({
  1890.               url: img.ext === '.gif' && img.animated !== false ?
  1891.                 [`${u}.webm`, `${u}.mp4`, u] :
  1892.                 u + img.ext,
  1893.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1894.             });
  1895.           }
  1896.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1897.             items.title = info.title;
  1898.           cb(items);
  1899.         },
  1900.         css: '.post > .hover { display:none!important; }',
  1901.       },
  1902.       {
  1903.         u: '||imgur.com/',
  1904.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1905.         s: 'gallery',
  1906.         g: (text, doc, url, m) =>
  1907.           m[2].split(',').map(id => ({
  1908.             url: `https://i.${m[1]}${id}.jpg`,
  1909.           })),
  1910.       },
  1911.       {
  1912.         u: '||imgur.com/',
  1913.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1914.         s: (m, node) => {
  1915.           if (/memegen|random|register|search|signin/.test(m.input))
  1916.             return '';
  1917.           const a = node.closest('a');
  1918.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1919.             return false;
  1920.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1921.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1922.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1923.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1924.           return ext === 'webm' ?
  1925.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1926.             u + ext;
  1927.         },
  1928.       },
  1929.       {
  1930.         u: [
  1931.           '||instagr.am/p/',
  1932.           '||instagram.com/p/',
  1933.         ],
  1934.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1935.         q: text => {
  1936.           const m = JSON.parse(text).graphql.shortcode_media;
  1937.           return m.video_url || m.display_url;
  1938.         },
  1939.         rect: 'div.PhotoGridMediaItem',
  1940.         c: text => {
  1941.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1942.           return m === undefined ? '(no caption)' : m.node.text;
  1943.         },
  1944.       },
  1945.       {
  1946.         u: [
  1947.           '||livememe.com/',
  1948.           '||lvme.me/',
  1949.         ],
  1950.         r: /\.\w+\/([^.]+)$/,
  1951.         s: 'http://i.lvme.me/$1.jpg',
  1952.       },
  1953.       {
  1954.         u: '||lostpic.net/image',
  1955.         q: '.image-viewer-image img',
  1956.       },
  1957.       {
  1958.         u: '||makeameme.org/meme/',
  1959.         r: /\/meme\/([^/?#]+)/,
  1960.         s: 'https://media.makeameme.org/created/$1.jpg',
  1961.       },
  1962.       {
  1963.         u: '||photobucket.com/',
  1964.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1965.         s: 'https://i$1$3',
  1966.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1967.       },
  1968.       {
  1969.         u: '||piccy.info/view3/',
  1970.         r: /(.+?\/view3)\/(.*)\//,
  1971.         s: '$1/$2/orig/',
  1972.         q: '#mainim',
  1973.       },
  1974.       {
  1975.         u: '||pimpandhost.com/image/',
  1976.         r: /(.+?\/image\/[0-9]+)/,
  1977.         s: '$1?size=original',
  1978.         q: 'img.original',
  1979.       },
  1980.       {
  1981.         u: [
  1982.           '||pixroute.com/',
  1983.           '||imgspice.com/',
  1984.         ],
  1985.         r: /\.html$/,
  1986.         q: 'img[id]',
  1987.         xhr: true,
  1988.       },
  1989.       {
  1990.         u: '||postima',
  1991.         r: /postima?ge?\.org\/image\/\w+/,
  1992.         q: [
  1993.           'a[href*="dl="]',
  1994.           '#main-image',
  1995.         ],
  1996.       },
  1997.       {
  1998.         u: [
  1999.           '||prntscr.com/',
  2000.           '||prnt.sc/',
  2001.         ],
  2002.         r: /\.\w+\/.+/,
  2003.         q: 'meta[property="og:image"]',
  2004.         xhr: true,
  2005.       },
  2006.       {
  2007.         u: '||radikal.ru/',
  2008.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2009.         s: (m, node, rule) =>
  2010.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2011.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2012.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2013.       },
  2014.       {
  2015.         u: '||tumblr.com',
  2016.         r: /_500\.jpg/,
  2017.         s: ['/_500/_1280/', ''],
  2018.       },
  2019.       {
  2020.         u: '||twimg.com/media/',
  2021.         r: /.+?format=(jpe?g|png|gif)/i,
  2022.         s: '$0&name=orig',
  2023.       },
  2024.       {
  2025.         u: '||twimg.com/media/',
  2026.         r: /.+?\.(jpe?g|png|gif)/i,
  2027.         s: '$0:orig',
  2028.       },
  2029.       {
  2030.         u: '||twimg.com/1/proxy',
  2031.         r: /t=([^&_]+)/i,
  2032.         s: m => atob(m[1]).match(/http.+/),
  2033.       },
  2034.       {
  2035.         u: '||twimg.com/',
  2036.         r: /\/profile_images/i,
  2037.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2038.       },
  2039.       {
  2040.         u: '||pic.twitter.com/',
  2041.         r: /\.com\/[a-z0-9]+/i,
  2042.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2043.         follow: true,
  2044.       },
  2045.       {
  2046.         u: '||twitpic.com/',
  2047.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2048.         s: 'https://twitpic.com/show/large/$2',
  2049.       },
  2050.       {
  2051.         u: '||wiki',
  2052.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  2053.         s: '/\\/thumb(?=\\/)|' +
  2054.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  2055.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  2056.         xhr: !hostname.includes('wiki'),
  2057.       },
  2058.       {
  2059.         u: '||ytimg.com/vi/',
  2060.         r: /(.+?\/vi\/[^/]+)/,
  2061.         s: '$1/0.jpg',
  2062.         rect: '.video-list-item',
  2063.       },
  2064.       {
  2065.         u: '/viewer.php?file=',
  2066.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2067.         s: '$1/images/$2',
  2068.         xhr: true,
  2069.       },
  2070.       {
  2071.         u: '/thumb_',
  2072.         r: /\/albums.+\/thumb_[^/]/,
  2073.         s: '/thumb_//',
  2074.       },
  2075.       {
  2076.         u: [
  2077.           '.th.jp',
  2078.           '.th.gif',
  2079.           '.th.png',
  2080.         ],
  2081.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2082.         s: '$1$2',
  2083.         follow: true,
  2084.       },
  2085.       {
  2086.         r: RX_MEDIA_URL,
  2087.       },
  2088.     ];
  2089.  
  2090.     /** @type mpiv.HostRule[] */
  2091.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2092.       .forEach(rule => {
  2093.         if (Array.isArray(rule.e))
  2094.           rule.e = rule.e.join(',');
  2095.       });
  2096.   },
  2097.  
  2098.   format(rule, {expand} = {}) {
  2099.     const s = Util.stringify(rule, null, ' ');
  2100.     return expand ?
  2101.       /* {"a": ...,
  2102.           "b": ...,
  2103.           "c": ...
  2104.          } */
  2105.       s.replace(/^{\s+/g, '{') :
  2106.       /* {"a": ..., "b": ..., "c": ...} */
  2107.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2108.   },
  2109.  
  2110.   fromElement(el) {
  2111.     const text = el.textContent.trim();
  2112.     if (text.startsWith('{') &&
  2113.         text.endsWith('}') &&
  2114.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2115.       const rule = tryCatch(JSON.parse, text);
  2116.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2117.     }
  2118.   },
  2119.  
  2120.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2121.  
  2122.   /** @returns mpiv.HostRule | Error | false | undefined */
  2123.   parse(rule) {
  2124.     const isBatchOp = this instanceof Map;
  2125.     try {
  2126.       if (typeof rule === 'string')
  2127.         rule = JSON.parse(rule);
  2128.       if ('d' in rule && typeof rule.d !== 'string')
  2129.         rule.d = undefined;
  2130.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2131.         return false;
  2132.       if ('e' in rule) {
  2133.         let {e} = rule;
  2134.         if (typeof e === 'string') {
  2135.           e = e.trim();
  2136.         } else if (
  2137.           Array.isArray(e) && !e.every((s, i) => typeof s === 'string' && (e[i] = s.trim())) ||
  2138.           e && !Object.entries(e).filter(Ruler.isValidE2).length
  2139.         ) {
  2140.           throw new Error('Invalid syntax for "e". Examples: ' +
  2141.             '"e": ".image" or ' +
  2142.             '"e": [".image1", ".image2"] or ' +
  2143.             '"e": {".parent": ".image"} or ' +
  2144.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2145.         }
  2146.         if (isBatchOp) rule.e = e || undefined;
  2147.       }
  2148.       let compileTo = isBatchOp ? rule : {};
  2149.       if (rule.r)
  2150.         compileTo.r = new RegExp(rule.r, 'i');
  2151.       if (App.NOP)
  2152.         compileTo = {};
  2153.       for (const key of Object.keys(FN_ARGS)) {
  2154.         if (RX_HAS_CODE.test(rule[key])) {
  2155.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2156.           if (fn !== App.NOP || !isBatchOp) {
  2157.             compileTo[key] = fn;
  2158.           } else if (isBatchOp) {
  2159.             this.set(rule, 'unsafe-eval');
  2160.           }
  2161.         }
  2162.       }
  2163.       return rule;
  2164.     } catch (err) {
  2165.       if (isBatchOp) {
  2166.         this.set(rule, err);
  2167.         return rule;
  2168.       } else {
  2169.         return err;
  2170.       }
  2171.     }
  2172.   },
  2173.  
  2174.   runC(text, doc = document) {
  2175.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2176.     ai.caption = fn(text, doc);
  2177.   },
  2178.  
  2179.   runCHandler: {
  2180.     function: (text, doc) =>
  2181.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2182.     string: (text, doc) => {
  2183.       const el = $many(ai.rule.c, doc);
  2184.       return !el ? '' :
  2185.         el.getAttribute('content') ||
  2186.         el.getAttribute('title') ||
  2187.         el.textContent;
  2188.     },
  2189.     default: () =>
  2190.       (ai.tooltip || 0).text ||
  2191.       ai.node.alt ||
  2192.       $propUp(ai.node, 'title') ||
  2193.       Remoting.getFileName(
  2194.         ai.node.tagName === (ai.popup || 0).tagName
  2195.           ? ai.url
  2196.           : ai.node.src || $propUp(ai.node, 'href')),
  2197.   },
  2198.  
  2199.   runQ(text, doc, docUrl) {
  2200.     let url;
  2201.     if (isFunction(ai.rule.q)) {
  2202.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2203.       if (Array.isArray(url)) {
  2204.         ai.urls = url.slice(1);
  2205.         url = url[0];
  2206.       }
  2207.     } else {
  2208.       const el = $many(ai.rule.q, doc);
  2209.       url = Remoting.findImageUrl(el, docUrl);
  2210.     }
  2211.     return url;
  2212.   },
  2213.  
  2214.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2215.   runE(rule, node) {
  2216.     const {e} = rule;
  2217.     if (typeof e === 'string')
  2218.       return node.matches(e);
  2219.     let p, img, res, info;
  2220.     for (const selParent in e) {
  2221.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2222.         if (img === node)
  2223.           res = true;
  2224.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2225.           return info;
  2226.       }
  2227.     }
  2228.     return res;
  2229.   },
  2230.  
  2231.   /** @returns {?Array} if falsy then the rule should be skipped */
  2232.   runS(node, rule, m) {
  2233.     let urls = [];
  2234.     for (const s of ensureArray(rule.s))
  2235.       urls.push(
  2236.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2237.           isFunction(s) ? s(m, node, rule) :
  2238.             s);
  2239.     if (rule.q && urls.length > 1) {
  2240.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2241.       return;
  2242.     }
  2243.     if (Array.isArray(urls[0]))
  2244.       urls = urls[0];
  2245.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2246.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2247.   },
  2248.  
  2249.   /** @returns {boolean} */
  2250.   runU(rule, url) {
  2251.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2252.     return u.fn.call(u.data, url);
  2253.   },
  2254.  
  2255.   substituteSingle(s, m) {
  2256.     if (!m || m.input == null) return s;
  2257.     if (s.startsWith('/') && !s.startsWith('//')) {
  2258.       const mid = s.search(/[^\\]\//) + 1;
  2259.       const end = s.lastIndexOf('/');
  2260.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2261.       return m.input.replace(re, s.slice(mid + 1, end));
  2262.     }
  2263.     if (m.length && s.includes('$')) {
  2264.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2265.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2266.         for (let i = maxLength; i >= 0; i--) {
  2267.           const part = num.slice(0, i) | 0;
  2268.           if (part < m.length)
  2269.             return (m[part] || '') + num.slice(i);
  2270.         }
  2271.         return text;
  2272.       });
  2273.     }
  2274.     return s;
  2275.   },
  2276.  
  2277.   toggle(rule, prop, condition) {
  2278.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2279.     return condition;
  2280.   },
  2281. };
  2282.  
  2283. const RuleMatcher = {
  2284.  
  2285.   /** @returns {Object} */
  2286.   adaptiveFind(node, opts) {
  2287.     const tn = node.tagName;
  2288.     const src = node.currentSrc || node.src;
  2289.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2290.     let a, info, url;
  2291.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2292.     if (tn !== 'A') {
  2293.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2294.       info = RuleMatcher.find(url, node, opts);
  2295.     }
  2296.     if (!info && (a = node.closest('A'))) {
  2297.       const ds = a.dataset;
  2298.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2299.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2300.       url = !url.startsWith('data:') && url;
  2301.       info = RuleMatcher.find(url, a, opts);
  2302.     }
  2303.     if (!info && isPic)
  2304.       info = {node, rule: {}, url: src};
  2305.     return info;
  2306.   },
  2307.  
  2308.   /** @returns ?mpiv.RuleMatchInfo */
  2309.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2310.     const tn = node.tagName;
  2311.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2312.     const isPicOrLink = isPic || tn === 'A';
  2313.     let m, html, info;
  2314.     for (const rule of rules || Ruler.rules) {
  2315.       if (skipRules && skipRules.includes(rule) ||
  2316.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2317.           rule.e && !rules && !(info = Ruler.runE(rule, node)))
  2318.         continue;
  2319.       if (info && info.url)
  2320.         return info;
  2321.       if (rule.r)
  2322.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2323.           ? rule.r.exec(html || (html = node.outerHTML))
  2324.           : url && rule.r.exec(url);
  2325.       else if (url)
  2326.         m = Object.assign([url], {index: 0, input: url});
  2327.       else
  2328.         m = [];
  2329.       if (!m)
  2330.         continue;
  2331.       if (rule.s === '')
  2332.         return {};
  2333.       let hasS = rule.s != null;
  2334.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2335.       // but we'll only allow it to match rules without 's' in the nested find call
  2336.       if (isPic && !hasS && !skipRules)
  2337.         continue;
  2338.       hasS &= rule.s !== 'gallery';
  2339.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2340.       if (urls)
  2341.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2342.     }
  2343.   },
  2344.  
  2345.   /** @returns ?mpiv.RuleMatchInfo */
  2346.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2347.     let info;
  2348.     let url = `${urls[0]}`;
  2349.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2350.     if (url)
  2351.       url = Util.rel2abs(url);
  2352.     else
  2353.       info = {};
  2354.     if (follow)
  2355.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2356.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2357.       const xhr = cfg.xhr && rule.xhr;
  2358.       info = {
  2359.         match,
  2360.         node,
  2361.         rule,
  2362.         url,
  2363.         urls: urls.length > 1 ? urls.slice(1) : null,
  2364.         gallery: rule.g && Gallery.makeParser(rule.g),
  2365.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2366.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2367.       };
  2368.     }
  2369.     return info;
  2370.   },
  2371.  
  2372.   isFollowableUrl(url, rule) {
  2373.     const f = rule.follow;
  2374.     return isFunction(f) ? f(url) : f;
  2375.   },
  2376. };
  2377.  
  2378. const Remoting = {
  2379.  
  2380.   gmXhr(url, opts = {}) {
  2381.     if (ai.req)
  2382.       tryCatch.call(ai.req, ai.req.abort);
  2383.     return new Promise((resolve, reject) => {
  2384.       const {anonymous} = ai.rule || {};
  2385.       ai.req = GM.xmlHttpRequest({
  2386.         url,
  2387.         anonymous,
  2388.         withCredentials: !anonymous,
  2389.         method: 'GET',
  2390.         timeout: 30e3,
  2391.         ...opts,
  2392.         onload: done,
  2393.         onerror: done,
  2394.         ontimeout() {
  2395.           ai.req = null;
  2396.           reject(`Timeout fetching ${url}`);
  2397.         },
  2398.       });
  2399.       function done(r) {
  2400.         ai.req = null;
  2401.         if (r.status < 400 && !r.error)
  2402.           resolve(r);
  2403.         else
  2404.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2405.       }
  2406.     });
  2407.   },
  2408.  
  2409.   async getDoc(url) {
  2410.     if (!url) {
  2411.       // current document
  2412.       return {
  2413.         doc,
  2414.         finalUrl: location.href,
  2415.         responseText: doc.documentElement.outerHTML,
  2416.       };
  2417.     }
  2418.     const r = await (!ai.post ?
  2419.       Remoting.gmXhr(url) :
  2420.       Remoting.gmXhr(url, {
  2421.         method: 'POST',
  2422.         data: ai.post,
  2423.         headers: {
  2424.           'Content-Type': 'application/x-www-form-urlencoded',
  2425.           'Referer': url,
  2426.         },
  2427.       }));
  2428.     r.doc = $parseHtml(r.responseText);
  2429.     return r;
  2430.   },
  2431.  
  2432.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2433.     ai.bufBar = false;
  2434.     ai.bufStart = now();
  2435.     const response = await Remoting.gmXhr(url, {
  2436.       responseType: 'blob',
  2437.       headers: {
  2438.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2439.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2440.       },
  2441.       onprogress: Remoting.getImageProgress,
  2442.     });
  2443.     Bar.set(false);
  2444.     const type = Remoting.guessMimeType(response);
  2445.     let b = response.response;
  2446.     if (!b) throw 'Empty response';
  2447.     if (b.type !== type)
  2448.       b = b.slice(0, b.size, type);
  2449.     const res = xhr === 'blob'
  2450.       ? (ai.blobUrl = URL.createObjectURL(b))
  2451.       : await Remoting.blobToDataUrl(b);
  2452.     return [res, type.startsWith('video')];
  2453.   },
  2454.  
  2455.   getImageProgress(e) {
  2456.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2457.       ai.bufBar = true;
  2458.     if (ai.bufBar) {
  2459.       const pct = e.loaded / e.total * 100 | 0;
  2460.       const size = e.total / 1024 | 0;
  2461.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2462.     }
  2463.   },
  2464.  
  2465.   async findRedirect() {
  2466.     try {
  2467.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2468.         method: 'HEAD',
  2469.         headers: {
  2470.           'Referer': location.href.split('#', 1)[0],
  2471.         },
  2472.       });
  2473.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2474.       if (!info || !info.url)
  2475.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2476.       Object.assign(ai, info);
  2477.       App.startSingle();
  2478.     } catch (e) {
  2479.       App.handleError(e);
  2480.     }
  2481.   },
  2482.  
  2483.   async saveFile() {
  2484.     const url = ai.popup.src || ai.popup.currentSrc;
  2485.     let name = Remoting.getFileName(ai.imageUrl || url);
  2486.     if (!name.includes('.'))
  2487.       name += '.jpg';
  2488.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2489.       $create('a', {href: url, download: name})
  2490.         .dispatchEvent(new MouseEvent('click'));
  2491.     } else {
  2492.       Status.set('+loading');
  2493.       const onload = () => Status.set('-loading');
  2494.       const gmDL = typeof GM_download === 'function';
  2495.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2496.         url,
  2497.         name,
  2498.         headers: {Referer: url},
  2499.         method: 'get', // polyfilling GM_download
  2500.         responseType: 'blob', // polyfilling GM_download
  2501.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2502.         onerror: e => {
  2503.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2504.           onload();
  2505.         },
  2506.         onprogress: Remoting.getImageProgress,
  2507.         onload({response}) {
  2508.           onload();
  2509.           if (!gmDL) { // polyfilling GM_download
  2510.             const a = Object.assign(document.createElement('a'), {
  2511.               href: URL.createObjectURL(response),
  2512.               download: name,
  2513.             });
  2514.             a.dispatchEvent(new MouseEvent('click'));
  2515.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2516.           }
  2517.         },
  2518.       });
  2519.     }
  2520.   },
  2521.  
  2522.   getFileName(url) {
  2523.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2524.   },
  2525.  
  2526.   blobToDataUrl(blob) {
  2527.     return new Promise((resolve, reject) => {
  2528.       const fr = new FileReader();
  2529.       fr.onload = () => resolve(fr.result);
  2530.       fr.onerror = reject;
  2531.       fr.readAsDataURL(blob);
  2532.     });
  2533.   },
  2534.  
  2535.   guessMimeType({responseHeaders, finalUrl}) {
  2536.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2537.         !RegExp.$1.includes('text/plain'))
  2538.       return RegExp.$1;
  2539.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2540.     switch (ext.toLowerCase()) {
  2541.       case 'bmp': return 'image/bmp';
  2542.       case 'gif': return 'image/gif';
  2543.       case 'jpe': return 'image/jpeg';
  2544.       case 'jpeg': return 'image/jpeg';
  2545.       case 'jpg': return 'image/jpeg';
  2546.       case 'mp4': return 'video/mp4';
  2547.       case 'png': return 'image/png';
  2548.       case 'svg': return 'image/svg+xml';
  2549.       case 'tif': return 'image/tiff';
  2550.       case 'tiff': return 'image/tiff';
  2551.       case 'webm': return 'video/webm';
  2552.       default: return 'application/octet-stream';
  2553.     }
  2554.   },
  2555.  
  2556.   findImageUrl(n, url) {
  2557.     if (!n) return;
  2558.     let html;
  2559.     const path =
  2560.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2561.       n.getAttribute('src') ||
  2562.       n.getAttribute('data-m4v') ||
  2563.       n.getAttribute('href') ||
  2564.       n.getAttribute('content') ||
  2565.       (html = n.outerHTML).includes('http') &&
  2566.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2567.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2568.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2569.   },
  2570. };
  2571.  
  2572. const Status = {
  2573.  
  2574.   set(status) {
  2575.     if (!status && !cfg.globalStatus) {
  2576.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2577.       return;
  2578.     }
  2579.     const prefix = cfg.globalStatus ? PREFIX : '';
  2580.     const action = status && /^[+-]/.test(status) && status[0];
  2581.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2582.     const el = cfg.globalStatus ? doc.documentElement :
  2583.       name === 'edge' ? ai.popup :
  2584.         ai.node;
  2585.     if (!el) return;
  2586.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2587.     const oldValue = (el.getAttribute(attr) || '').trim();
  2588.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2589.     switch (action) {
  2590.       case '-':
  2591.         cls.delete(name);
  2592.         break;
  2593.       case false:
  2594.         for (const c of cls)
  2595.           if (c.startsWith(prefix) && c !== name)
  2596.             cls.delete(c);
  2597.       // fallthrough to +
  2598.       case '+':
  2599.         if (name)
  2600.           cls.add(name);
  2601.         break;
  2602.     }
  2603.     const newValue = [...cls].join(' ');
  2604.     if (newValue !== oldValue)
  2605.       el.setAttribute(attr, newValue);
  2606.   },
  2607.  
  2608.   loading(force) {
  2609.     if (!force) {
  2610.       clearTimeout(ai.timerStatus);
  2611.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2612.     } else if (!ai.popupLoaded) {
  2613.       Status.set('+loading');
  2614.     }
  2615.   },
  2616. };
  2617.  
  2618. const UrlMatcher = (() => {
  2619.   // string-to-regexp escaped chars
  2620.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2621.   // rx for '^' symbol in simple url match
  2622.   const RX_SEP = /[^\w%._-]/y;
  2623.   const RXS_SEP = RX_SEP.source;
  2624.   return match => {
  2625.     const results = [];
  2626.     for (const s of ensureArray(match)) {
  2627.       const pinDomain = s.startsWith('||');
  2628.       const pinStart = !pinDomain && s.startsWith('|');
  2629.       const endSep = s.endsWith('^');
  2630.       let fn;
  2631.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2632.       if (needle.includes('^')) {
  2633.         let plain = '';
  2634.         for (const part of needle.split('^'))
  2635.           if (part.length > plain.length)
  2636.             plain = part;
  2637.         const rx = new RegExp(
  2638.           (pinStart ? '^' : '') +
  2639.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2640.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2641.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2642.         needle = [plain, rx];
  2643.         fn = regexp;
  2644.       } else if (pinStart) {
  2645.         fn = endSep ? equals : starts;
  2646.       } else if (pinDomain) {
  2647.         const slashPos = needle.indexOf('/');
  2648.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2649.         needle = [needle, domain, slashPos > 0, endSep];
  2650.         fn = startsDomainPrescreen;
  2651.       } else if (endSep) {
  2652.         fn = ends;
  2653.       } else {
  2654.         fn = has;
  2655.       }
  2656.       results.push({fn, data: needle});
  2657.     }
  2658.     return results.length > 1 ?
  2659.       {fn: checkArray, data: results} :
  2660.       results[0];
  2661.   };
  2662.   function checkArray(s) {
  2663.     return this.some(checkArrayItem, s);
  2664.   }
  2665.   function checkArrayItem(item) {
  2666.     return item.fn.call(item.data, this);
  2667.   }
  2668.   function ends(s) {
  2669.     return s.endsWith(this) || (
  2670.       s.length > this.length &&
  2671.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2672.       endsWithSep(s));
  2673.   }
  2674.   function endsWithSep(s, pos = s.length - 1) {
  2675.     RX_SEP.lastIndex = pos;
  2676.     return RX_SEP.test(s);
  2677.   }
  2678.   function equals(s) {
  2679.     return s.startsWith(this) && (
  2680.       s.length === this.length ||
  2681.       s.length === this.length + 1 && endsWithSep(s));
  2682.   }
  2683.   function has(s) {
  2684.     return s.includes(this);
  2685.   }
  2686.   function regexp(s) {
  2687.     return s.includes(this[0]) && this[1].test(s);
  2688.   }
  2689.   function starts(s) {
  2690.     return s.startsWith(this);
  2691.   }
  2692.   function startsDomainPrescreen(url) {
  2693.     return url.includes(this[0]) && startsDomain.call(this, url);
  2694.   }
  2695.   function startsDomain(url) {
  2696.     let hostStart = url.indexOf('//');
  2697.     if (hostStart && url[hostStart - 1] !== ':')
  2698.       return;
  2699.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2700.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2701.     const [needle, domain, pinDomainEnd, endSep] = this;
  2702.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2703.     for (; ; start++) {
  2704.       start = host.indexOf(domain, start);
  2705.       if (start < 0)
  2706.         return;
  2707.       if (!start || host[start - 1] === '.')
  2708.         break;
  2709.     }
  2710.     start += hostStart;
  2711.     if (url.lastIndexOf(needle, start) !== start)
  2712.       return;
  2713.     const end = start + needle.length;
  2714.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2715.   }
  2716. })();
  2717.  
  2718. const Util = {
  2719.  
  2720.   addStyle(name, css) {
  2721.     const id = `${PREFIX}style:${name}`;
  2722.     const el = doc.getElementById(id) ||
  2723.                css && $create('style', {id});
  2724.     if (!el) return;
  2725.     if (el.textContent !== css)
  2726.       el.textContent = css;
  2727.     if (el.parentElement !== doc.head)
  2728.       doc.head.appendChild(el);
  2729.     return el;
  2730.   },
  2731.  
  2732.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2733.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2734.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2735.   },
  2736.  
  2737.   decodeHtmlEntities(s) {
  2738.     return s
  2739.       .replace(/&quot;/g, '"')
  2740.       .replace(/&apos;/g, '\'')
  2741.       .replace(/&lt;/g, '<')
  2742.       .replace(/&gt;/g, '>')
  2743.       .replace(/&amp;/g, '&');
  2744.   },
  2745.  
  2746.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2747.   decodeUrl(url) {
  2748.     if (!url || typeof url !== 'string') return url;
  2749.     const iPct = url.indexOf('%');
  2750.     const iColon = url.indexOf(':');
  2751.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2752.       decodeURIComponent(url) :
  2753.       url;
  2754.   },
  2755.  
  2756.   deepEqual(a, b) {
  2757.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2758.       return a === b;
  2759.     if (Array.isArray(a)) {
  2760.       return Array.isArray(b) &&
  2761.         a.length === b.length &&
  2762.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2763.     }
  2764.     const keys = Object.keys(a);
  2765.     return keys.length === Object.keys(b).length &&
  2766.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2767.   },
  2768.  
  2769.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2770.  
  2771.   forceLayout(node) {
  2772.     // eslint-disable-next-line no-unused-expressions
  2773.     node.clientHeight;
  2774.   },
  2775.  
  2776.   formatError(e, rule) {
  2777.     const message =
  2778.       e.message ||
  2779.       e.readyState && 'Request failed.' ||
  2780.       e.type === 'error' && `File can't be displayed.${
  2781.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2782.       }` ||
  2783.       e;
  2784.     const m = [
  2785.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2786.       ['', 'font-weight:normal'],
  2787.     ];
  2788.     m.push(...[
  2789.       ['Node: %o', ai.node],
  2790.       ['Rule: %o', rule],
  2791.       ai.url && ['URL: %s', ai.url],
  2792.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2793.     ].filter(Boolean));
  2794.     return {
  2795.       message,
  2796.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2797.       consoleArgs: m.map(([, v]) => v),
  2798.     };
  2799.   },
  2800.  
  2801.   isHovered(el) {
  2802.     // doesn't work in image tabs, browser bug?
  2803.     return App.isImageTab || el.closest(':hover');
  2804.   },
  2805.  
  2806.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2807.  
  2808.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2809.  
  2810.   newFunction(...args) {
  2811.     try {
  2812.       return App.NOP || new Function(...args);
  2813.     } catch (e) {
  2814.       if (!RX_EVAL_BLOCKED.test(e.message))
  2815.         throw e;
  2816.       App.NOP = () => {};
  2817.       return App.NOP;
  2818.     }
  2819.   },
  2820.  
  2821.   rel2abs(rel, abs = location.href) {
  2822.     try {
  2823.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2824.         new URL(rel, abs).href;
  2825.     } catch (e) {
  2826.       return rel;
  2827.     }
  2828.   },
  2829.  
  2830.   stringify(...args) {
  2831.     const p = Array.prototype;
  2832.     const {toJSON} = p;
  2833.     if (toJSON) p.toJSON = null;
  2834.     const res = JSON.stringify(...args);
  2835.     if (toJSON) p.toJSON = toJSON;
  2836.     return res;
  2837.   },
  2838.  
  2839.   suppressTooltip() {
  2840.     for (const node of [
  2841.       ai.node.parentNode,
  2842.       ai.node,
  2843.       ai.node.firstElementChild,
  2844.     ]) {
  2845.       const t = (node || 0).title;
  2846.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2847.         ai.tooltip = {node, text: t};
  2848.         node.title = '';
  2849.         break;
  2850.       }
  2851.     }
  2852.   },
  2853.  
  2854.   tabFixUrl() {
  2855.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2856.            navigator.userAgent.includes('Gecko/') &&
  2857.            flattenHtml(`data:text/html;charset=utf8,
  2858.       <style>
  2859.         body {
  2860.           margin: 0;
  2861.           padding: 0;
  2862.           background: #222;
  2863.         }
  2864.         .fit {
  2865.           overflow: hidden
  2866.         }
  2867.         .fit > img {
  2868.           max-width: 100vw;
  2869.           max-height: 100vh;
  2870.         }
  2871.         body > img {
  2872.           margin: auto;
  2873.           position: absolute;
  2874.           left: 0;
  2875.           right: 0;
  2876.           top: 0;
  2877.           bottom: 0;
  2878.         }
  2879.       </style>
  2880.       <body class=fit>
  2881.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2882.       </body>
  2883.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2884.   },
  2885. };
  2886.  
  2887. async function setup({rule} = {}) {
  2888.   if (!isFunction(doc.body.attachShadow)) {
  2889.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2890.           'You can edit the script\'s storage directly in your userscript manager.');
  2891.     return;
  2892.   }
  2893.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2894.   let uiCfg;
  2895.   let root = (elConfig || 0).shadowRoot;
  2896.   let {blankRuleElement} = setup;
  2897.   /** @type NodeList */
  2898.   const UI = new Proxy({}, {
  2899.     get(_, id) {
  2900.       return root.getElementById(id);
  2901.     },
  2902.   });
  2903.   if (!rule || !elConfig)
  2904.     init(await Config.load({save: true}));
  2905.   if (rule)
  2906.     installRule(rule);
  2907.  
  2908.   function init(data) {
  2909.     uiCfg = data;
  2910.     $remove(elConfig);
  2911.     elConfig = $create('div', {contentEditable: true});
  2912.     root = elConfig.attachShadow({mode: 'open'});
  2913.     root.innerHTML = TRUSTED.createHTML(createConfigHtml());
  2914.     initEvents();
  2915.     renderAll();
  2916.     renderCustomScales();
  2917.     renderRules();
  2918.     doc.body.appendChild(elConfig);
  2919.     requestAnimationFrame(() => {
  2920.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2921.     });
  2922.   }
  2923.  
  2924.   function initEvents() {
  2925.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2926.     UI._export.onclick = e => {
  2927.       dropEvent(e);
  2928.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2929.       UI._exportNotification.hidden = false;
  2930.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2931.     };
  2932.     UI._import.onclick = e => {
  2933.       dropEvent(e);
  2934.       const s = prompt('Paste settings:');
  2935.       if (s)
  2936.         init(new Config({data: s}));
  2937.     };
  2938.     UI._install.onclick = setupRuleInstaller;
  2939.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2940.     UI._reveal.onclick = e => {
  2941.       e.preventDefault();
  2942.       cssApp.hidden = !cssApp.hidden;
  2943.       if (!cssApp.hidden) {
  2944.         if (!cssApp.value) {
  2945.           App.updateStyles();
  2946.           cssApp.value = App.globalStyle.trim();
  2947.           cssApp.setSelectionRange(0, 0);
  2948.         }
  2949.         cssApp.focus();
  2950.       }
  2951.     };
  2952.     UI.start.onchange = function () {
  2953.       UI.delay.closest('label').hidden =
  2954.         UI.preload.closest('label').hidden =
  2955.           this.value !== 'auto';
  2956.     };
  2957.     UI.start.onchange();
  2958.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2959.     // color
  2960.     for (const el of $$('[type="color"]', root)) {
  2961.       el.oninput = colorOnInput;
  2962.       el.elSwatch = el.nextElementSibling;
  2963.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2964.       el.elOpacity.elColor = el;
  2965.     }
  2966.     function colorOnInput() {
  2967.       this.elSwatch.style.setProperty('--color',
  2968.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2969.     }
  2970.     // range
  2971.     for (const el of $$('[type="range"]', root)) {
  2972.       el.oninput = rangeOnInput;
  2973.       el.onblur = rangeOnBlur;
  2974.       el.addEventListener('focusin', rangeOnFocus);
  2975.     }
  2976.     function rangeOnBlur(e) {
  2977.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2978.         this.elEdit.onblur(e);
  2979.     }
  2980.     function rangeOnFocus() {
  2981.       if (this.elEdit) return;
  2982.       const {min, max, step, value} = this;
  2983.       this.elEdit = $create('input', {
  2984.         value, min, max, step,
  2985.         className: 'range-edit',
  2986.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2987.         type: 'number',
  2988.         elRange: this,
  2989.         onblur: rangeEditOnBlur,
  2990.         oninput: rangeEditOnInput,
  2991.       });
  2992.       this.insertAdjacentElement('afterend', this.elEdit);
  2993.     }
  2994.     function rangeOnInput() {
  2995.       this.title = (this.dataset.title || '').replace('$', this.value);
  2996.       if (this.elColor) this.elColor.oninput();
  2997.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2998.     }
  2999.     // range-edit
  3000.     function rangeEditOnBlur(e) {
  3001.       if (e.relatedTarget !== this.elRange) {
  3002.         this.remove();
  3003.         this.elRange.elEdit = null;
  3004.       }
  3005.     }
  3006.     function rangeEditOnInput() {
  3007.       this.elRange.valueAsNumber = this.valueAsNumber;
  3008.       this.elRange.oninput();
  3009.     }
  3010.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3011.     // which may happen since it sees only the outer <div> in the event |target|
  3012.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3013.   }
  3014.  
  3015.   function closeSetup(event) {
  3016.     const isApply = this.id === '_apply';
  3017.     if (event && (this.id === '_ok' || isApply)) {
  3018.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3019.       Ruler.init();
  3020.       Menu.reRegisterAlt();
  3021.       if (isApply) {
  3022.         renderCustomScales();
  3023.         UI._css.textContent = cfg._getCss();
  3024.         return;
  3025.       }
  3026.     }
  3027.     $remove(elConfig);
  3028.     elConfig = null;
  3029.   }
  3030.  
  3031.   function collectConfig({save, clone} = {}) {
  3032.     let data = {};
  3033.     for (const el of $$('input[id], select[id]', root))
  3034.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3035.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3036.           el.value || '';
  3037.     Object.assign(data, {
  3038.       css: UI.css.value.trim(),
  3039.       delay: UI.delay.valueAsNumber * 1000,
  3040.       hosts: collectRules(),
  3041.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3042.       scales: UI.scales.value
  3043.         .trim()
  3044.         .split(/[,;]*\s+/)
  3045.         .map(x => x.replace(',', '.'))
  3046.         .filter(x => !isNaN(parseFloat(x))),
  3047.     });
  3048.     if (clone)
  3049.       data = JSON.parse(Util.stringify(data));
  3050.     return new Config({data, save});
  3051.   }
  3052.  
  3053.   function collectRules() {
  3054.     return [...UI._rules.children]
  3055.       .map(el => [el.value.trim(), el[RULE]])
  3056.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3057.       .map(([s, json]) => json || s)
  3058.       .filter(Boolean);
  3059.   }
  3060.  
  3061.   function checkRule({target: el}) {
  3062.     let json, error, title;
  3063.     const prev = el.previousElementSibling;
  3064.     if (el.value) {
  3065.       json = Ruler.parse(el.value);
  3066.       error = json instanceof Error && (json.message || String(json));
  3067.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3068.         !/^[-.a-z0-9]*$/i.test(json.d);
  3069.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3070.         .filter(Boolean).join('\n');
  3071.       el.classList.toggle('invalid-domain', invalidDomain);
  3072.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3073.       if (!prev)
  3074.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3075.     } else if (prev) {
  3076.       prev.focus();
  3077.       el.remove();
  3078.     }
  3079.     el[RULE] = !error && json;
  3080.     el.title = title;
  3081.     el.setCustomValidity(error || '');
  3082.   }
  3083.  
  3084.   async function focusRule({target: el, relatedTarget: from}) {
  3085.     if (el === this)
  3086.       return;
  3087.     await new Promise(setTimeout);
  3088.     if (el[RULE] && el.rows < 2) {
  3089.       let i = el.selectionStart;
  3090.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3091.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3092.       el.setSelectionRange(i, i);
  3093.       el.rows = txt.match(/^/gm).length;
  3094.     }
  3095.     if (!this.contains(from))
  3096.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3097.   }
  3098.  
  3099.   function installRule(rule) {
  3100.     const inputs = UI._rules.children;
  3101.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3102.     if (!el) {
  3103.       el = inputs[0];
  3104.       el[RULE] = rule;
  3105.       el.value = Ruler.format(rule);
  3106.       el.hidden = false;
  3107.       const i = Math.max(0, collectRules().indexOf(rule));
  3108.       inputs[i].insertAdjacentElement('afterend', el);
  3109.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3110.     }
  3111.     const rect = el.getBoundingClientRect();
  3112.     if (rect.bottom < 0 ||
  3113.         rect.bottom > el.parentNode.offsetHeight)
  3114.       el.scrollIntoView();
  3115.     el.classList.add('highlight');
  3116.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3117.     el.focus();
  3118.   }
  3119.  
  3120.   function renderRules() {
  3121.     const rules = UI._rules;
  3122.     rules.addEventListener('input', checkRule);
  3123.     rules.addEventListener('focusin', focusRule);
  3124.     rules.addEventListener('paste', focusRule);
  3125.     blankRuleElement =
  3126.       setup.blankRuleElement =
  3127.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3128.     for (const rule of uiCfg.hosts || []) {
  3129.       const el = blankRuleElement.cloneNode();
  3130.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3131.       rules.appendChild(el);
  3132.       checkRule({target: el});
  3133.     }
  3134.     const search = UI._search;
  3135.     search.oninput = () => {
  3136.       setup.search = search.value;
  3137.       const s = search.value.toLowerCase();
  3138.       for (const el of rules.children)
  3139.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3140.     };
  3141.     search.value = setup.search || '';
  3142.     if (search.value)
  3143.       search.oninput();
  3144.   }
  3145.  
  3146.   function renderCustomScales() {
  3147.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3148.   }
  3149.  
  3150.   function renderAll() {
  3151.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3152.       if (el.id in uiCfg)
  3153.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3154.     for (const el of $$('input[type="range"]', root))
  3155.       el.oninput();
  3156.     for (const el of $$('a[href^="http"]', root))
  3157.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3158.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3159.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3160.   }
  3161. }
  3162.  
  3163. function setupClickedRule(event) {
  3164.   let rule;
  3165.   const el = event.target.closest('blockquote, code, pre');
  3166.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3167.     dropEvent(event);
  3168.     setup({rule});
  3169.   }
  3170. }
  3171.  
  3172. async function setupRuleInstaller(e) {
  3173.   dropEvent(e);
  3174.   const parent = this.parentElement;
  3175.   parent.children._installLoading.hidden = false;
  3176.   this.remove();
  3177.   let rules;
  3178.  
  3179.   try {
  3180.     rules = extractRules(await Remoting.getDoc(this.href));
  3181.     const selector = $create('select', {
  3182.       size: 8,
  3183.       style: 'width: 100%',
  3184.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3185.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3186.     });
  3187.     selector.append(...rules.map(renderRule));
  3188.     selector.selectedIndex = findMatchingRuleIndex();
  3189.     parent.children._installLoading.remove();
  3190.     parent.children._installHint.hidden = false;
  3191.     parent.appendChild(selector);
  3192.     requestAnimationFrame(() => {
  3193.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3194.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3195.       selector.focus();
  3196.     });
  3197.   } catch (e) {
  3198.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3199.   }
  3200.  
  3201.   function extractRules({doc}) {
  3202.     // sort by name
  3203.     return [...$$('#wiki-body tr', doc)]
  3204.       .map(tr => [
  3205.         tr.cells[0].textContent.trim(),
  3206.         Ruler.fromElement(tr.cells[1]),
  3207.       ])
  3208.       .filter(([name, r]) =>
  3209.         name && r && (!r.d || hostname.includes(r.d)))
  3210.       .sort(([a], [b]) =>
  3211.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3212.           a > b ? 1 :
  3213.             0);
  3214.   }
  3215.  
  3216.   function findMatchingRuleIndex() {
  3217.     const dottedHost = `.${hostname}.`;
  3218.     let maxCount = 0, maxIndex = 0, index = 0;
  3219.     for (const [name, {d}] of rules) {
  3220.       let count = !!(d && hostname.includes(d)) * 10;
  3221.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3222.         count += dottedHost.includes(`.${part}.`) && part.length;
  3223.       if (count > maxCount) {
  3224.         maxCount = count;
  3225.         maxIndex = index;
  3226.       }
  3227.       index++;
  3228.     }
  3229.     return maxIndex;
  3230.   }
  3231.  
  3232.   function renderRule([name, rule]) {
  3233.     return $create('option', {
  3234.       textContent: name,
  3235.       title: Ruler.format(rule, {expand: true})
  3236.         .replace(/^{|\s*}$/g, '')
  3237.         .split('\n')
  3238.         .slice(0, 12)
  3239.         .map(renderTitleLine)
  3240.         .filter(Boolean)
  3241.         .join('\n'),
  3242.     });
  3243.   }
  3244.  
  3245.   function renderTitleLine(line, i, arr) {
  3246.     return (
  3247.       // show ... on 10th line if there are more lines
  3248.       i === 9 && arr.length > 10 ? '...' :
  3249.         i > 10 ? '' :
  3250.           // truncate to 100 chars
  3251.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3252.             // strip the leading space
  3253.             .replace(/^\s/, ''));
  3254.   }
  3255.  
  3256.   function maybeSetup(e) {
  3257.     if (!eventModifiers(e))
  3258.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3259.   }
  3260. }
  3261.  
  3262. function createConfigHtml() {
  3263.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3264.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3265.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3266.   return flattenHtml(`
  3267. <style>
  3268.   :host {
  3269.     all: initial !important;
  3270.     position: fixed !important;
  3271.     z-index: 2147483647 !important;
  3272.     top: 20px !important;
  3273.     right: 20px !important;
  3274.     padding: 1.5em !important;
  3275.     color: #000 !important;
  3276.     background: #eee !important;
  3277.     box-shadow: 5px 5px 25px 2px #000 !important;
  3278.     width: 33em !important;
  3279.     border: 1px solid black !important;
  3280.     display: flex !important;
  3281.     flex-direction: column !important;
  3282.   }
  3283.   main {
  3284.     font: 12px/15px sans-serif;
  3285.   }
  3286.   table {
  3287.     text-align:left;
  3288.   }
  3289.   ul {
  3290.     max-height: calc(100vh - 200px);
  3291.     margin: 0 0 15px 0;
  3292.     padding: 0;
  3293.     list-style: none;
  3294.   }
  3295.   li {
  3296.     margin: 0;
  3297.     padding: .25em 0;
  3298.   }
  3299.   li.options {
  3300.     display: flex;
  3301.     align-items: center;
  3302.     justify-content: space-between;
  3303.   }
  3304.   li.row {
  3305.     align-items: start;
  3306.     flex-wrap: wrap;
  3307.   }
  3308.   li.row label {
  3309.     display: flex;
  3310.     flex-direction: row;
  3311.     align-items: center;
  3312.   }
  3313.   li.row input {
  3314.     margin-right: .25em;
  3315.   }
  3316.   li.stretch label {
  3317.     flex: 1;
  3318.     white-space: nowrap;
  3319.   }
  3320.   li.stretch label > span {
  3321.     display: flex;
  3322.     flex-direction: row;
  3323.     flex: 1;
  3324.   }
  3325.   label {
  3326.     display: inline-flex;
  3327.     flex-direction: column;
  3328.   }
  3329.   label:not(:last-child) {
  3330.     margin-right: 1em;
  3331.   }
  3332.   input, select {
  3333.     min-height: 1.3em;
  3334.     box-sizing: border-box;
  3335.   }
  3336.   input[type=checkbox] {
  3337.     margin-left: 0;
  3338.   }
  3339.   input[type=number] {
  3340.     width: 4em;
  3341.   }
  3342.   input:not([type=checkbox])  {
  3343.     padding: 0 .25em;
  3344.   }
  3345.   input[type=range] {
  3346.     flex: 1;
  3347.     width: 100%;
  3348.     margin: 0 .25em;
  3349.     padding: 0;
  3350.     filter: saturate(0);
  3351.     opacity: .5;
  3352.   }
  3353.   u + input[type=range] {
  3354.     max-width: 3em;
  3355.   }
  3356.   input[type=range]:hover {
  3357.     filter: none;
  3358.     opacity: 1;
  3359.   }
  3360.   input[type=color] {
  3361.     position: absolute;
  3362.     width: calc(1.5em + 2px);
  3363.     opacity: 0;
  3364.     cursor: pointer;
  3365.   }
  3366.   u {
  3367.     position: relative;
  3368.     flex: 0 0 1.5em;
  3369.     height: 1.5em;
  3370.     border: 1px solid #888;
  3371.     pointer-events: none;
  3372.     color: #888;
  3373.     background-image:
  3374.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3375.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3376.     background-size: .5em .5em;
  3377.     background-position: 0 0, .25em .25em;
  3378.   }
  3379.   u::after {
  3380.     position: absolute;
  3381.     top: 0;
  3382.     left: 0;
  3383.     right: 0;
  3384.     bottom: 0;
  3385.     content: "";
  3386.     background-color: var(--color);
  3387.   }
  3388.   .range-edit {
  3389.     position: absolute;
  3390.     box-shadow: 0 0.25em 1em #000;
  3391.     z-index: 99;
  3392.   }
  3393.   textarea {
  3394.     resize: vertical;
  3395.     margin: 1px 0;
  3396.     font: 11px/1.25 Consolas, monospace;
  3397.   }
  3398.   :invalid {
  3399.     background-color: #f002;
  3400.     border-color: #800;
  3401.   }
  3402.   code {
  3403.     font-weight: bold;
  3404.   }
  3405.   a {
  3406.     text-decoration: none;
  3407.     color: LinkText;
  3408.   }
  3409.   a:hover {
  3410.     text-decoration: underline;
  3411.   }
  3412.   button {
  3413.     padding: .2em 1em;
  3414.     margin: 0 1em;
  3415.   }
  3416.   kbd {
  3417.     padding: 1px 6px;
  3418.     font-weight: bold;
  3419.     font-family: Consolas, monospace;
  3420.     border: 1px solid #888;
  3421.     border-radius: 3px;
  3422.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3423.   }
  3424.   .column {
  3425.     display: flex;
  3426.     flex-direction: column;
  3427.   }
  3428.   .highlight {
  3429.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3430.     animation-fill-mode: both;
  3431.   }
  3432.   #_rules > * {
  3433.     word-break: break-all;
  3434.   }
  3435.   #_rules > :not(:focus) {
  3436.     overflow: hidden; /* prevents wrapping in FF */
  3437.   }
  3438.   .invalid-domain {
  3439.     opacity: .5;
  3440.   }
  3441.   .matching-domain {
  3442.     border-color: #56b8ff;
  3443.     background: #d7eaff;
  3444.   }
  3445.   #_x {
  3446.     position: absolute;
  3447.     top: 0;
  3448.     right: 0;
  3449.     padding: 4px 8px;
  3450.     cursor: pointer;
  3451.     user-select: none;
  3452.   }
  3453.   #_x:hover {
  3454.     background-color: #8884;
  3455.   }
  3456.   #_cssApp {
  3457.     color: seagreen;
  3458.   }
  3459.   #_exportNotification {
  3460.     color: green;
  3461.     font-weight: bold;
  3462.     position: absolute;
  3463.     left: 0;
  3464.     right: 0;
  3465.     bottom: 2px;
  3466.   }
  3467.   #_installHint {
  3468.     color: green;
  3469.   }
  3470.   @keyframes fade-in {
  3471.     from { background-color: deepskyblue }
  3472.     to {}
  3473.   }
  3474.   @media (prefers-color-scheme: dark) {
  3475.     :host {
  3476.       color: #aaa !important;
  3477.       background: #333 !important;
  3478.     }
  3479.     a {
  3480.       color: deepskyblue;
  3481.     }
  3482.     button {
  3483.       background: linear-gradient(-5deg, #333, #555);
  3484.       border: 1px solid #000;
  3485.       box-shadow: 0 2px 6px #181818;
  3486.       border-radius: 3px;
  3487.       cursor: pointer;
  3488.     }
  3489.     button:hover {
  3490.       background: linear-gradient(-5deg, #333, #666);
  3491.     }
  3492.     textarea, input, select {
  3493.       background: #111;
  3494.       color: #BBB;
  3495.       border: 1px solid #555;
  3496.     }
  3497.     input[type=checkbox] {
  3498.       filter: invert(1);
  3499.     }
  3500.     input[type=range] {
  3501.       filter: invert(1) saturate(0);
  3502.     }
  3503.     input[type=range]:hover {
  3504.       filter: invert(1);
  3505.     }
  3506.     kbd {
  3507.       border-color: #666;
  3508.     }
  3509.     @supports (-moz-appearance: none) {
  3510.       input[type=checkbox],
  3511.       input[type=range],
  3512.       input[type=range]:hover {
  3513.         filter: none;
  3514.       }
  3515.     }
  3516.     .range-edit {
  3517.       box-shadow: 0 .5em 1em .5em #000;
  3518.     }
  3519.     .matching-domain {
  3520.       border-color: #0065af;
  3521.       background: #032b58;
  3522.       color: #ddd;
  3523.     }
  3524.     #_cssApp {
  3525.       color: darkseagreen;
  3526.     }
  3527.     #_installHint {
  3528.       color: greenyellow;
  3529.     }
  3530.     ::-webkit-scrollbar {
  3531.       width: 14px;
  3532.       height: 14px;
  3533.       background: #333;
  3534.     }
  3535.     ::-webkit-scrollbar-button:single-button {
  3536.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3537.     }
  3538.     ::-webkit-scrollbar-track-piece {
  3539.       background: #444;
  3540.       border: 4px solid #333;
  3541.       border-radius: 8px;
  3542.     }
  3543.     ::-webkit-scrollbar-thumb {
  3544.       border: 3px solid #333;
  3545.       border-radius: 8px;
  3546.       background: #666;
  3547.     }
  3548.     ::-webkit-resizer {
  3549.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3550.       border: 2px solid transparent;
  3551.     }
  3552.   }
  3553. </style>
  3554. <style id="_css">${cfg._getCss()}</style>
  3555. <main id="${PREFIX}setup">
  3556.   <div id=_x>x</div>
  3557.   <ul class=column>
  3558.     <details style="margin: -1em 0 0">
  3559.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3560.       <table>
  3561.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3562.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3563.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3564.         <tr><th>Force-activate<br>(for small pics)</th>
  3565.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3566.         <tr><td>&nbsp;</td></tr>
  3567.         <tr><th>Start zooming</th>
  3568.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3569.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3570.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3571.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3572.         <tr><th>Previous/next<br>in album</th>
  3573.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3574.         <tr><td>&nbsp;</td></tr>
  3575.       </table>
  3576.       <table>
  3577.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3578.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3579.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3580.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3581.       </table>
  3582.     </details>
  3583.     <li class="options stretch">
  3584.       <label>Popup shows on
  3585.         <select id=start>
  3586.           <option value=context>Right-click / &#8801; / Ctrl
  3587.           <option value=contextMK>Right-click / &#8801;
  3588.           <option value=contextM>Right-click
  3589.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3590.           <option value=ctrl>Ctrl
  3591.           <option value=auto>automatically
  3592.         </select>
  3593.       </label>
  3594.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3595.       <label title="(if the full version of the hovered image is ...% larger)">
  3596.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3597.       </label>
  3598.       <label>Zoom activates on
  3599.         <select id=zoom>
  3600.           <option value=context>Right click / Shift
  3601.           <option value=wheel>Wheel up / Shift
  3602.           <option value=shift>Shift
  3603.           <option value=auto>automatically
  3604.         </select>
  3605.       </label>
  3606.       <label>...and zooms to
  3607.         <select id=fit>
  3608.           <option value=all>fit to window
  3609.           <option value=large>fit if larger
  3610.           <option value=no>100%
  3611.           <option value="" title="Use custom scale factors">custom
  3612.         </select>
  3613.       </label>
  3614.     </li>
  3615.     <li class=options>
  3616.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3617.       </label>
  3618.       <label>When fully zoomed out:
  3619.         <select id=zoomOut>
  3620.           <option value=stay>stay in zoom mode
  3621.           <option value=auto>stay if still hovered
  3622.           <option value=unzoom>undo zoom mode
  3623.           <option value=close>close popup
  3624.         </select>
  3625.       </label>
  3626.       <label style="flex: 1" title="${trimLeft(`
  3627.         Scale factors to use when “zooms to” selector is set to “custom”.
  3628.         0 = fit to window,
  3629.         0! = same as 0 but also removes smaller values,
  3630.         * after a value marks the default zoom factor, for example: 1*
  3631.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3632.         ${scalesHint}
  3633.       `)}">Custom scale factors:
  3634.         <input id=scales placeholder="${scalesHint}">
  3635.       </label>
  3636.     </li>
  3637.     <li class="options row">
  3638.       <div>
  3639.         <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3640.           <input type=checkbox id=center>Centered*</label>
  3641.         <label title="Provides smoother experience but increases network traffic">
  3642.           <input type=checkbox id=preload>Preload on hover*</label>
  3643.         <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3644.       </div>
  3645.       <div>
  3646.         <label><input type=checkbox id=mute>Mute videos</label>
  3647.         <label title="Disable only if you spoof the HTTP headers yourself">
  3648.           <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3649.         <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3650.           <input type=checkbox id=globalStatus>Set status on &lt;html&gt;*</label>
  3651.       </div>
  3652.       <div>
  3653.         <label title="...or show a partial image while still loading">
  3654.           <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3655.         <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3656.         <label><input type=checkbox id=uiFadeinGallery>Fade-in transition in gallery</label>
  3657.       </div>
  3658.       <label><input type=checkbox id=startAltShown>
  3659.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3660.     </li>
  3661.     <li class="options stretch">
  3662.       <label>Background
  3663.         <span>
  3664.           <input id=uiBackgroundColor type=color><u></u>
  3665.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3666.         </span>
  3667.       </label>
  3668.       <label>Border color, opacity, size
  3669.         <span>
  3670.           <input id=uiBorderColor type=color><u></u>
  3671.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3672.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3673.         </span>
  3674.       </label>
  3675.       <label>Shadow color, opacity, size
  3676.         <span>
  3677.           <input id=uiShadowColor type=color><u></u>
  3678.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3679.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3680.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3681.         </span>
  3682.       </label>
  3683.       <label>Padding
  3684.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3685.       </label>
  3686.       <label>Margin
  3687.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3688.       </label>
  3689.     </li>
  3690.     <li>
  3691.       <a href="${MPIV_BASE_URL}Custom-CSS" target="_blank">Custom CSS:</a>&nbsp;
  3692.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3693.       <a tabindex=0 id=_reveal style="float: right"
  3694.          title="You can copy parts of it to override them in your custom CSS">
  3695.          View the built-in CSS</a>
  3696.       <div class=column>
  3697.         <textarea id=css spellcheck=false></textarea>
  3698.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3699.       </div>
  3700.     </li>
  3701.     <li style="display: flex; justify-content: space-between;">
  3702.       <div><a href="${MPIV_BASE_URL}Custom-host-rules" target="_blank">Custom host rules:</a></div>
  3703.       <div style="white-space: nowrap">
  3704.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3705.         in "d" value, for example <code>"d": "!foo.com"</code>
  3706.       </div>
  3707.       <div>
  3708.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3709.       </div>
  3710.     </li>
  3711.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3712.       <div id=_rules class=column>
  3713.         <textarea rows=1 spellcheck=false></textarea>
  3714.       </div>
  3715.     </li>
  3716.     <li>
  3717.       <div hidden id=_installLoading>Loading...</div>
  3718.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3719.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3720.       <a href="${MPIV_BASE_URL}Rules" id=_install target="_blank">Install rule from repository...</a>
  3721.     </li>
  3722.   </ul>
  3723.   <div style="text-align:center">
  3724.     <button id=_ok accesskey=s>OK</button>
  3725.     <button id=_apply accesskey=a>Apply</button>
  3726.     <button id=_import style="margin-right: 0">Import</button>
  3727.     <button id=_export style="margin-left: 0">Export</button>
  3728.     <button id=_cancel>Cancel</button>
  3729.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3730.   </div>
  3731. </main>`);
  3732. }
  3733.  
  3734. function createGlobalStyle() {
  3735.   App.globalStyle = /*language=CSS*/ (String.raw`
  3736. #\mpiv-bar {
  3737.   position: fixed;
  3738.   z-index: 2147483647;
  3739.   top: 0;
  3740.   left: 0;
  3741.   right: 0;
  3742.   opacity: 0;
  3743.   transition: opacity 1s ease .25s;
  3744.   text-align: center;
  3745.   font-family: sans-serif;
  3746.   font-size: 15px;
  3747.   font-weight: bold;
  3748.   background: #0005;
  3749.   color: white;
  3750.   padding: 4px 10px;
  3751.   text-shadow: .5px .5px 2px #000;
  3752. }
  3753. #\mpiv-bar.\mpiv-show,
  3754. #\mpiv-bar[data-force] {
  3755.   opacity: 1;
  3756. }
  3757. #\mpiv-bar[data-zoom]::after {
  3758.   content: " (" attr(data-zoom) ")";
  3759.   opacity: .8;
  3760. }
  3761. #\mpiv-popup.\mpiv-show {
  3762.   display: inline;
  3763. }
  3764. #\mpiv-popup {
  3765.   display: none;
  3766.   cursor: none;
  3767. ${cfg.uiFadein ? String.raw`
  3768.   animation: .2s \mpiv-fadein both;
  3769.   transition: box-shadow .25s, background-color .25s;
  3770.   ` : ''}
  3771. ${App.popupStyleBase = `
  3772.   border: none;
  3773.   box-sizing: border-box;
  3774.   background-size: cover;
  3775.   position: fixed;
  3776.   z-index: 2147483647;
  3777.   padding: 0;
  3778.   margin: 0;
  3779.   top: 0;
  3780.   left: 0;
  3781.   width: auto;
  3782.   height: auto;
  3783.   transform-origin: center;
  3784.   max-width: none;
  3785.   max-height: none;
  3786. `}
  3787. }
  3788. #\mpiv-popup.\mpiv-show {
  3789.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3790.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3791.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3792.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3793. }
  3794. #\mpiv-popup.\mpiv-show[loaded] {
  3795.   background-color: ${Util.color('Background')};
  3796.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3797. }
  3798. #\mpiv-popup[data-gallery-flip] {
  3799.   animation: none;
  3800.   transition: none;
  3801. }
  3802. #\mpiv-popup[data-no-aa],
  3803. #\mpiv-popup.\mpiv-zoom-max {
  3804.   image-rendering: pixelated;
  3805. }
  3806. #\mpiv-setup {
  3807. }
  3808. @keyframes \mpiv-fadein {
  3809.   from {
  3810.     opacity: 0;
  3811.     border-color: transparent;
  3812.   }
  3813.   to {
  3814.     opacity: 1;
  3815.   }
  3816. }
  3817. ` + (cfg.globalStatus ? String.raw`
  3818. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3819.   cursor: progress !important;
  3820. }
  3821. :root.\mpiv-edge #\mpiv-popup {
  3822.   cursor: default;
  3823. }
  3824. :root.\mpiv-error *:hover {
  3825.   cursor: not-allowed !important;
  3826. }
  3827. :root.\mpiv-ready *:hover,
  3828. :root.\mpiv-large *:hover {
  3829.   cursor: zoom-in !important;
  3830. }
  3831. :root.\mpiv-shift *:hover {
  3832.   cursor: default !important;
  3833. }
  3834. ` : String.raw`
  3835. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3836.   cursor: progress;
  3837. }
  3838. [\mpiv-status~="edge"]:hover {
  3839.   cursor: default;
  3840. }
  3841. [\mpiv-status~="error"]:hover {
  3842.   cursor: not-allowed;
  3843. }
  3844. [\mpiv-status~="ready"]:hover,
  3845. [\mpiv-status~="large"]:hover {
  3846.   cursor: zoom-in;
  3847. }
  3848. [\mpiv-status~="shift"]:hover {
  3849.   cursor: default;
  3850. }
  3851. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3852.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3853.   return App.globalStyle;
  3854. }
  3855.  
  3856. //#region Global utilities
  3857.  
  3858. const clamp = (v, min, max) =>
  3859.   v < min ? min : v > max ? max : v;
  3860.  
  3861. const compareNumbers = (a, b) =>
  3862.   a - b;
  3863.  
  3864. const flattenHtml = str =>
  3865.   str.trim().replace(/\n\s*/g, '');
  3866.  
  3867. const dropEvent = e =>
  3868.   (e.preventDefault(), e.stopPropagation());
  3869.  
  3870. const ensureArray = v =>
  3871.   Array.isArray(v) ? v : [v];
  3872.  
  3873. /** @param {KeyboardEvent} e */
  3874. const eventModifiers = e =>
  3875.   (e.altKey ? '!' : '') +
  3876.   (e.ctrlKey ? '^' : '') +
  3877.   (e.metaKey ? '#' : '') +
  3878.   (e.shiftKey ? '+' : '');
  3879.  
  3880. const isFunction = val => typeof val === 'function';
  3881.  
  3882. const now = performance.now.bind(performance);
  3883.  
  3884. const sumProps = (...props) => {
  3885.   let sum = 0;
  3886.   for (const p of props)
  3887.     sum += parseFloat(p) || 0;
  3888.   return sum;
  3889. };
  3890.  
  3891. const tryCatch = function (fn, ...args) {
  3892.   try {
  3893.     return fn.apply(this, args);
  3894.   } catch (e) {}
  3895. };
  3896.  
  3897. const $ = (sel, node = doc) =>
  3898.   node.querySelector(sel) || false;
  3899.  
  3900. const $$ = (sel, node = doc) =>
  3901.   node.querySelectorAll(sel);
  3902.  
  3903. const $create = (tag, props) =>
  3904.   Object.assign(doc.createElement(tag), props);
  3905.  
  3906. const $css = (el, props) =>
  3907.   Object.entries(props).forEach(([k, v]) =>
  3908.     el.style.setProperty(k, v, 'important'));
  3909.  
  3910. const $parseHtml = str =>
  3911.   new DOMParser().parseFromString(str, 'text/html');
  3912.  
  3913. const $many = (q, doc) => {
  3914.   for (const selector of ensureArray(q)) {
  3915.     const el = selector && $(selector, doc);
  3916.     if (el)
  3917.       return el;
  3918.   }
  3919. };
  3920.  
  3921. const $prop = (sel, prop, node = doc) =>
  3922.   (node = $(sel, node)) && node[prop] || '';
  3923.  
  3924. const $propUp = (node, prop) =>
  3925.   (node = node.closest(`[${prop}]`)) &&
  3926.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3927.   '';
  3928.  
  3929. const $remove = node =>
  3930.   node && node.remove();
  3931.  
  3932. //#endregion
  3933. //#region Init
  3934.  
  3935. nonce = ($('script[nonce]') || {}).nonce || '';
  3936. CspSniffer.init();
  3937.  
  3938. Config.load({save: true}).then(res => {
  3939.   cfg = res;
  3940.   if (Menu) Menu.register();
  3941.  
  3942.   if (doc.body) App.checkImageTab();
  3943.   else addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3944.  
  3945.   addEventListener('mouseover', Events.onMouseOver, true);
  3946.   addEventListener('contextmenu', Events.onContext, true);
  3947.   addEventListener('keydown', Events.onKeyDown, true);
  3948.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3949.     addEventListener('click', setupClickedRule, true);
  3950.   addEventListener('message', App.onMessage, true);
  3951. });
  3952.  
  3953. //#endregion