☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2022-02-03 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5. //
  6. // @include     *
  7. //
  8. // @grant       GM_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     1.2.20
  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.     if (ai.imageUrl &&
  255.         !ai.xhr &&
  256.         !ai.imageUrl.startsWith(location.origin + '/') &&
  257.         location.protocol === 'https:' &&
  258.         CspSniffer.init) {
  259.       Popup.create(ai.imageUrl, ai.pageUrl, e);
  260.       return;
  261.     }
  262.     const fe = Util.formatError(e, rule);
  263.     if (!rule || !ai.urls || !ai.urls.length)
  264.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  265.     if (ai.urls && ai.urls.length) {
  266.       ai.url = ai.urls.shift();
  267.       if (ai.url) {
  268.         App.stopTimers();
  269.         App.startSingle();
  270.       } else {
  271.         App.deactivate();
  272.       }
  273.     } else if (ai.node) {
  274.       Status.set('error');
  275.       Bar.set(fe.message, 'error');
  276.     }
  277.   },
  278.  
  279.   /** @param {MessageEvent} e */
  280.   onMessage(e) {
  281.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  282.       e.stopImmediatePropagation();
  283.       for (const el of doc.getElementsByTagName('iframe')) {
  284.         if (el.contentWindow === e.source) {
  285.           const s = Calc.frameSize(el, window).join(':');
  286.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  287.           return;
  288.         }
  289.       }
  290.     }
  291.   },
  292.  
  293.   /** @param {MessageEvent} e */
  294.   onMessageChild(e) {
  295.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  296.       e.stopImmediatePropagation();
  297.       removeEventListener('message', App.onMessageChild, true);
  298.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  299.       if (w && h) ai.view = {w, h, x, y};
  300.     }
  301.   },
  302.  
  303.   start() {
  304.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  305.     if (!Util.isHovered(ai.node)) {
  306.       App.deactivate();
  307.       return;
  308.     }
  309.     App.updateStyles();
  310.     if (ai.gallery)
  311.       App.startGallery();
  312.     else
  313.       App.startSingle();
  314.   },
  315.  
  316.   startSingle() {
  317.     Status.loading();
  318.     ai.imageUrl = null;
  319.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  320.       Req.findRedirect();
  321.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  322.       App.startFromQ();
  323.     } else {
  324.       Popup.create(ai.url);
  325.       Ruler.runC();
  326.     }
  327.   },
  328.  
  329.   async startFromQ() {
  330.     try {
  331.       const {responseText, doc, finalUrl} = await Req.getDoc(ai.url);
  332.       const url = Ruler.runQ(responseText, doc, finalUrl);
  333.       if (!url)
  334.         throw 'The "q" rule did not produce any URL.';
  335.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  336.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  337.         if (!info || !info.url)
  338.           throw `Couldn't follow URL: ${url}`;
  339.         Object.assign(ai, info);
  340.         App.startSingle();
  341.       } else {
  342.         Popup.create(url, finalUrl);
  343.         Ruler.runC(responseText, doc);
  344.       }
  345.     } catch (e) {
  346.       App.handleError(e);
  347.     }
  348.   },
  349.  
  350.   async startGallery() {
  351.     Status.loading();
  352.     try {
  353.       const startUrl = ai.url;
  354.       const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
  355.       const items = await new Promise(resolve => {
  356.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  357.           resolve);
  358.         if (Array.isArray(it))
  359.           resolve(it);
  360.       });
  361.       // bail out if the gallery's async callback took too long
  362.       if (ai.url !== startUrl) return;
  363.       ai.gNum = items.length;
  364.       ai.gItems = items.length && items;
  365.       if (ai.gItems) {
  366.         const i = items.index;
  367.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  368.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  369.             Gallery.findIndex(ai.url);
  370.         setTimeout(Gallery.next);
  371.       } else {
  372.         throw 'Empty gallery';
  373.       }
  374.     } catch (e) {
  375.       App.handleError(e);
  376.     }
  377.   },
  378.  
  379.   stopTimers() {
  380.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  381.       clearTimeout(ai[timer]);
  382.     clearInterval(ai.timerProgress);
  383.   },
  384.  
  385.   toggleZoom({keepScale} = {}) {
  386.     const p = ai.popup;
  387.     if (!p || !ai.scales || ai.scales.length < 2)
  388.       return;
  389.     ai.zoomed = !ai.zoomed;
  390.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  391.     if (ai.zooming)
  392.       p.classList.add(`${PREFIX}zooming`);
  393.     Popup.move();
  394.     Bar.updateDetails();
  395.     Status.set(ai.zoomed ? 'zoom' : false);
  396.     return ai.zoomed;
  397.   },
  398.  
  399.   updateStyles() {
  400.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  401.     Util.addStyle('rule', ai.rule.css || '');
  402.   },
  403. };
  404.  
  405. const Bar = {
  406.  
  407.   set(label, className) {
  408.     let b = ai.bar;
  409.     if (typeof label !== 'string') {
  410.       $remove(b);
  411.       ai.bar = null;
  412.       return;
  413.     }
  414.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  415.     App.updateStyles();
  416.     Bar.updateDetails();
  417.     Bar.show();
  418.     b.textContent = '';
  419.     b.innerHTML = TRUSTED.createHTML(label);
  420.     if (!b.parentNode) {
  421.       doc.body.appendChild(b);
  422.       Util.forceLayout(b);
  423.     }
  424.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  425.   },
  426.  
  427.   show(isForced) {
  428.     clearTimeout(ai.timerBar);
  429.     ai.bar.style.removeProperty('opacity');
  430.     if (isForced)
  431.       ai.bar.dataset.force = '';
  432.     else
  433.       ai.timerBar = setTimeout(Bar.hide, 3000);
  434.   },
  435.  
  436.   hide(isForced) {
  437.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  438.       $css(ai.bar, {opacity: 0});
  439.       delete ai.bar.dataset.force;
  440.     }
  441.   },
  442.  
  443.   updateName() {
  444.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  445.     if (gi) {
  446.       const item = gi[i];
  447.       const noDesc = !gi.some(_ => _.desc);
  448.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  449.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  450.         item.desc,
  451.       ].filter(Boolean).join(' - ')}`;
  452.       Bar.set(c.trim() || ' ', 'gallery', true);
  453.     } else if ('caption' in ai) {
  454.       Bar.set(ai.caption, 'caption');
  455.     } else if (ai.tooltip) {
  456.       Bar.set(ai.tooltip.text, 'tooltip');
  457.     } else {
  458.       Bar.set(' ', 'info');
  459.     }
  460.   },
  461.  
  462.   updateDetails() {
  463.     if (!ai.bar) return;
  464.     const r = ai.rotate;
  465.     const zoom = ai.nwidth && `${
  466.       Math.round(ai.scale * 100)
  467.     }%${
  468.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  469.     }${
  470.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  471.     }, ${
  472.       ai.nwidth
  473.     } x ${
  474.       ai.nheight
  475.     } px, ${
  476.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  477.     } MP, ${
  478.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  479.     }`.replace(/\x20/g, '\xA0');
  480.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  481.       if (zoom) ai.bar.dataset.zoom = zoom;
  482.       else delete ai.bar.dataset.zoom;
  483.       Bar.show();
  484.     }
  485.   },
  486. };
  487.  
  488. const Calc = {
  489.  
  490.   aspectRatio(w, h) {
  491.     for (let rat = w / h, a, b = 0; ;) {
  492.       b++;
  493.       a = Math.round(w * b / h);
  494.       if (a > 10 && b > 10 || a > 100 || b > 100)
  495.         return rat.toFixed(2);
  496.       if (Math.abs(a / b - rat) < .01)
  497.         return `${a}:${b}`;
  498.     }
  499.   },
  500.  
  501.   frameSize(elFrame, wnd) {
  502.     if (!elFrame) return;
  503.     const r = elFrame.getBoundingClientRect();
  504.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  505.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  506.     const x = r.left < 0 ? -r.left : 0;
  507.     const y = r.top < 0 ? -r.top : 0;
  508.     return [w, h, x, y];
  509.   },
  510.  
  511.   generateScales(fit) {
  512.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  513.     const zoomStep = cfg.zoomStep / 100;
  514.     const arr = [scale];
  515.     if (fit !== 1) {
  516.       const diff = goal / scale;
  517.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  518.       const step = steps && Math.pow(diff, 1 / steps);
  519.       for (let i = steps; --i > 0;)
  520.         arr.push((scale *= step));
  521.       arr.push(scale = goal);
  522.     }
  523.     while ((scale *= zoomStep) <= ZOOM_MAX)
  524.       arr.push(scale);
  525.     return arr;
  526.   },
  527.  
  528.   measurePopup() {
  529.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  530.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  531.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  532.     if (p.clientWidth > nw) {
  533.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  534.       nh = ai.nheight = w / nw * nh | 0;
  535.       nw = ai.nwidth = w;
  536.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  537.     }
  538.     p.className = `${PREFIX}show`;
  539.     p.removeAttribute('style');
  540.     const s = getComputedStyle(p);
  541.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  542.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  543.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  544.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  545.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  546.     ai.extras = {
  547.       inw, inh,
  548.       outw, outh,
  549.       o: o2 / 2,
  550.       w: inw + outw,
  551.       h: inh + outh,
  552.     };
  553.     const fit = Math.min(
  554.       (ai.view.w - ai.extras.w) / ai.nwidth,
  555.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  556.     const isCustom = !cfg.fit && cfg.scales.length;
  557.     let cutoff = Math.min(1, fit);
  558.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  559.     if (isCustom) {
  560.       const dst = [];
  561.       for (const scale of cfg.scales) {
  562.         const val = parseFloat(scale) || fit;
  563.         dst.push(val);
  564.         if (isCustom && typeof scale === 'string') {
  565.           if (scale.includes('!')) cutoff = val;
  566.           if (scale.includes('*')) scaleZoom = val;
  567.         }
  568.       }
  569.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  570.     } else {
  571.       ai.scales = Calc.generateScales(fit);
  572.     }
  573.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  574.     ai.scaleFit = fit;
  575.     ai.scaleZoom = scaleZoom;
  576.   },
  577.  
  578.   rect() {
  579.     let {node, rule} = ai;
  580.     let n = rule.rect && node.closest(rule.rect);
  581.     if (n) return n.getBoundingClientRect();
  582.     const nested = node.getElementsByTagName('*');
  583.     let maxArea = 0;
  584.     let maxBounds;
  585.     n = node;
  586.     for (let i = 0; n; n = nested[i++]) {
  587.       const bounds = n.getBoundingClientRect();
  588.       const area = bounds.width * bounds.height;
  589.       if (area > maxArea) {
  590.         maxArea = area;
  591.         maxBounds = bounds;
  592.         node = n;
  593.       }
  594.     }
  595.     return maxBounds;
  596.   },
  597.  
  598.   scaleBiggerThan(scale, i, arr) {
  599.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  600.   },
  601.  
  602.   scaleIndex(dir) {
  603.     const i = ai.scales.indexOf(ai.scale);
  604.     if (i >= 0) return i + dir;
  605.     for (
  606.       let len = ai.scales.length,
  607.         i = dir > 0 ? 0 : len - 1;
  608.       i >= 0 && i < len;
  609.       i += dir
  610.     ) {
  611.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  612.         return i;
  613.     }
  614.     return -1;
  615.   },
  616.  
  617.   scaleForFirstZoom(keepScale) {
  618.     const z = ai.scaleZoom;
  619.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  620.   },
  621.  
  622.   updateViewSize() {
  623.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  624.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  625.     if (window === top) return;
  626.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  627.     if (w && h) {
  628.       ai.view = {w, h, x: 0, y: 0};
  629.     } else {
  630.       addEventListener('message', App.onMessageChild, true);
  631.       parent.postMessage(MSG.getViewSize, '*');
  632.     }
  633.   },
  634. };
  635.  
  636. class Config {
  637.  
  638.   constructor({data: c, save}) {
  639.     if (typeof c === 'string')
  640.       c = tryJSON(c);
  641.     if (typeof c !== 'object' || !c)
  642.       c = {};
  643.     const {DEFAULTS} = Config;
  644.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  645.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  646.         '';
  647.     if (c.version !== DEFAULTS.version) {
  648.       if (typeof c.hosts === 'string')
  649.         c.hosts = c.hosts.split('\n')
  650.           .map(s => tryJSON(s) || s)
  651.           .filter(Boolean);
  652.       if (c.close === true || c.close === false)
  653.         c.zoomOut = c.close ? 'auto' : 'stay';
  654.       for (const key in DEFAULTS)
  655.         if (typeof c[key] !== typeof DEFAULTS[key])
  656.           c[key] = DEFAULTS[key];
  657.       if (c.version === 3 && c.scales[0] === 0)
  658.         c.scales[0] = '0!';
  659.       for (const key in c)
  660.         if (!(key in DEFAULTS))
  661.           delete c[key];
  662.       c.version = DEFAULTS.version;
  663.       if (save)
  664.         GM.setValue('cfg', c);
  665.     }
  666.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  667.       App.globalStyle = '';
  668.     if (!Array.isArray(c.scales))
  669.       c.scales = [];
  670.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  671.     Object.assign(this, DEFAULTS, c);
  672.   }
  673.  
  674.   static async load(opts) {
  675.     opts.data = await GM.getValue('cfg');
  676.     return new Config(opts);
  677.   }
  678.  
  679.   _getCss() {
  680.     const {css} = this;
  681.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  682.   }
  683. }
  684.  
  685. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  686.   center: false,
  687.   css: '',
  688.   delay: 500,
  689.   fit: '',
  690.   globalStatus: false,
  691.   // prefer ' inside rules because " will be displayed as \"
  692.   // example: "img[src*='icon']"
  693.   hosts: [{
  694.     name: 'No popup for YouTube thumbnails',
  695.     d: 'www.youtube.com',
  696.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  697.     s: '',
  698.   }, {
  699.     name: 'No popup for SVG/PNG icons',
  700.     d: '',
  701.     e: "img[src*='icon']",
  702.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  703.     s: '',
  704.   }],
  705.   imgtab: false,
  706.   mute: false,
  707.   preload: false,
  708.   scale: 1.25,
  709.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  710.   start: 'auto',
  711.   startAlt: 'context',
  712.   startAltShown: false,
  713.   uiBackgroundColor: '#ffffff',
  714.   uiBackgroundOpacity: 100,
  715.   uiBorderColor: '#000000',
  716.   uiBorderOpacity: 100,
  717.   uiBorder: 0,
  718.   uiFadein: true,
  719.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  720.   uiShadowColor: '#000000',
  721.   uiShadowOpacity: 80,
  722.   uiShadow: 20,
  723.   uiPadding: 0,
  724.   uiMargin: 0,
  725.   version: 6,
  726.   waitLoad: false,
  727.   xhr: true,
  728.   zoom: 'context',
  729.   zoomOut: 'auto',
  730.   zoomStep: 133,
  731. });
  732.  
  733. const CspSniffer = {
  734.  
  735.   /** @type {?Object<string,string[]>} */
  736.   csp: null,
  737.   selfUrl: location.origin + '/',
  738.  
  739.   // will be null when done
  740.   init() {
  741.     this.busy = new Promise(resolve => {
  742.       const xhr = new XMLHttpRequest();
  743.       xhr.open('get', location);
  744.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  745.       xhr.onreadystatechange = () => {
  746.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  747.           this.csp = this._parse(xhr.getResponseHeader('content-security-policy'));
  748.           this.init = this.busy = xhr.onreadystatechange = null;
  749.           xhr.abort();
  750.           resolve();
  751.         }
  752.       };
  753.       xhr.send();
  754.     });
  755.   },
  756.  
  757.   async check(url, allowInit) {
  758.     if (allowInit && this.init) this.init();
  759.     if (this.busy) await this.busy;
  760.     const isVideo = Util.isVideoUrl(url);
  761.     let mode;
  762.     if (this.csp) {
  763.       const src = this.csp[isVideo ? 'media' : 'img'];
  764.       if (!src.some(this._srcMatches, url))
  765.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  766.     }
  767.     return [mode || ai.xhr, isVideo];
  768.   },
  769.  
  770.   _parse(csp) {
  771.     if (!csp) return;
  772.     const src = {};
  773.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  774.     for (let m; (m = rx.exec(csp));)
  775.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  776.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  777.       nonce = RegExp.$1;
  778.     if ((src.trusted || []).includes("'script'"))
  779.       App.NOP = () => {};
  780.     if (!src.img) src.img = src.default || [];
  781.     if (!src.media) src.media = src.default || [];
  782.     for (const set of [src.img, src.media]) {
  783.       set.forEach((item, i) => {
  784.         if (item !== '*' && item.includes('*')) {
  785.           set[i] = new RegExp(
  786.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  787.             item
  788.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  789.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  790.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  791.             .replace(/[^/]$/, '$&/'));
  792.         }
  793.       });
  794.     }
  795.     return src;
  796.   },
  797.  
  798.   /** @this string */
  799.   _srcMatches(src) {
  800.     return src instanceof RegExp ? src.test(this) :
  801.       src === '*' ||
  802.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  803.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  804.   },
  805. };
  806.  
  807. const Events = {
  808.  
  809.   hoverData: null,
  810.   hoverTimer: 0,
  811.   ignoreKeyHeld: false,
  812.  
  813.   onMouseOver(e) {
  814.     let node = e.target;
  815.     Events.ignoreKeyHeld = e.shiftKey;
  816.     if (!App.isEnabled ||
  817.         e.shiftKey ||
  818.         ai.zoomed ||
  819.         node === ai.popup ||
  820.         node === doc.body ||
  821.         node === doc.documentElement ||
  822.         node === elConfig ||
  823.         ai.gallery && ai.rectHovered)
  824.       return;
  825.     if (node.shadowRoot)
  826.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  827.     // we don't want to process everything in the path of a quickly moving mouse cursor
  828.     Events.hoverData = {e, node, start: now()};
  829.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  830.   },
  831.  
  832.   onMouseOverThrottled(force) {
  833.     if (!Events.hoverData)
  834.       return;
  835.     const {start, e, node} = Events.hoverData;
  836.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  837.     const wait = force ? 0 : start + SETTLE_TIME - now();
  838.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  839.     if (Events.hoverTimer || !Util.isHovered(node))
  840.       return;
  841.     Events.hoverData = null;
  842.     if (!Ruler.rules)
  843.       Ruler.init();
  844.     const info = RuleMatcher.adaptiveFind(node);
  845.     if (info && info.url && info.node !== ai.node)
  846.       App.activate(info, e);
  847.   },
  848.  
  849.   onMouseOut(e) {
  850.     if (!e.relatedTarget && !e.shiftKey)
  851.       App.deactivate();
  852.   },
  853.  
  854.   onMouseOutShadow(e) {
  855.     const root = e.target.shadowRoot;
  856.     if (root) {
  857.       root.removeEventListener('mouseover', Events.onMouseOver);
  858.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  859.     }
  860.   },
  861.  
  862.   onMouseMove(e) {
  863.     Events.trackMouse(e);
  864.     if (e.shiftKey)
  865.       return;
  866.     if (!ai.zoomed && !ai.rectHovered) {
  867.       App.deactivate();
  868.     } else if (ai.zoomed) {
  869.       Popup.move();
  870.       const {cx, cy, view: {w, h}} = ai;
  871.       const bx = w / 6;
  872.       const by = h / 6;
  873.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  874.       Status.set(`${onEdge ? '+' : '-'}edge`);
  875.     }
  876.   },
  877.  
  878.   onMouseDown({shiftKey, button}) {
  879.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  880.       ai.controlled = ai.zoomed = true;
  881.     } else if (button === 2 || shiftKey) {
  882.       // Shift = ignore; RMB will be processed in onContext
  883.     } else {
  884.       App.deactivate({wait: true});
  885.       doc.addEventListener('mouseup', App.enable, {once: true});
  886.     }
  887.   },
  888.  
  889.   onMouseScroll(e) {
  890.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  891.     if (ai.zoomed) {
  892.       Events.zoomInOut(dir);
  893.     } else if (ai.gNum > 1 && ai.popup) {
  894.       Gallery.next(-dir);
  895.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  896.       App.toggleZoom();
  897.     } else {
  898.       App.deactivate();
  899.       return;
  900.     }
  901.     dropEvent(e);
  902.   },
  903.  
  904.   onKeyDown(e) {
  905.     // Synthesized events may be of the wrong type and not have a `key`
  906.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  907.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  908.     if (!p &&
  909.         !Events.ignoreKeyHeld &&
  910.         key === '^Control' &&
  911.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  912.       dropEvent(e);
  913.       if (Events.hoverData) {
  914.         Events.hoverData.e = e;
  915.         Events.onMouseOverThrottled(true);
  916.       }
  917.       if (ai.node) {
  918.         ai.force = true;
  919.         App.start();
  920.       }
  921.     }
  922.     if (!p || e.repeat)
  923.       return;
  924.     switch (key) {
  925.       case '+Shift':
  926.         if (ai.shiftKeyTime)
  927.           return;
  928.         ai.shiftKeyTime = now();
  929.         Status.set('+shift');
  930.         Bar.show(true);
  931.         if (p.tagName === 'VIDEO')
  932.           p.controls = true;
  933.         return;
  934.       case 'KeyA':
  935.         if (!p.hasAttribute('data-no-aa'))
  936.           p.setAttribute('data-no-aa', '');
  937.         else
  938.           p.removeAttribute('data-no-aa');
  939.         break;
  940.       case 'ArrowRight':
  941.       case 'KeyJ':
  942.         Gallery.next(1);
  943.         break;
  944.       case 'ArrowLeft':
  945.       case 'KeyK':
  946.         Gallery.next(-1);
  947.         break;
  948.       case 'KeyD':
  949.         Req.saveFile();
  950.         break;
  951.       case 'KeyH': // flip horizontally
  952.       case 'KeyV': // flip vertically
  953.       case 'KeyL': // rotate left
  954.       case 'KeyR': // rotate right
  955.         if (!p)
  956.           return;
  957.         if (key === 'KeyH' || key === 'KeyV') {
  958.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  959.           ai[side] = !ai[side];
  960.         } else {
  961.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  962.         }
  963.         Bar.updateDetails();
  964.         Popup.move();
  965.         break;
  966.       case 'KeyM':
  967.         if (p.tagName === 'VIDEO')
  968.           p.muted = !p.muted;
  969.         break;
  970.       case 'KeyT':
  971.         GM.openInTab(Util.tabFixUrl() || p.src);
  972.         App.deactivate();
  973.         break;
  974.       case 'Minus':
  975.       case 'NumpadSubtract':
  976.         if (ai.zoomed) {
  977.           Events.zoomInOut(-1);
  978.         } else {
  979.           App.toggleZoom();
  980.         }
  981.         break;
  982.       case 'Equal':
  983.       case 'NumpadAdd':
  984.         if (ai.zoomed) {
  985.           Events.zoomInOut(1);
  986.         } else {
  987.           App.toggleZoom();
  988.         }
  989.         break;
  990.       case 'Escape':
  991.         App.deactivate({wait: true});
  992.         break;
  993.       case '!Alt':
  994.         return;
  995.       default:
  996.         App.deactivate({wait: true});
  997.         return;
  998.     }
  999.     dropEvent(e);
  1000.   },
  1001.  
  1002.   onKeyUp(e) {
  1003.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  1004.       Status.set('-shift');
  1005.       Bar.hide(true);
  1006.       if ((ai.popup || {}).controls)
  1007.         ai.popup.controls = false;
  1008.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1009.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1010.         ai.controlled = false;
  1011.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  1012.         App.toggleZoom();
  1013.       else
  1014.         App.deactivate({wait: true});
  1015.       ai.shiftKeyTime = 0;
  1016.     }
  1017.   },
  1018.  
  1019.   onContext(e) {
  1020.     if (Events.ignoreKeyHeld)
  1021.       return;
  1022.     const p = ai.popup;
  1023.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1024.       dropEvent(e);
  1025.     } else if (!p && (
  1026.       cfg.start === 'context' ||
  1027.       cfg.start === 'contextMK' ||
  1028.       cfg.start === 'contextM' && (e.button === 2) ||
  1029.       cfg.start === 'contextK' && (e.button !== 2) ||
  1030.       (cfg.start === 'auto' && ai.rule.manual)
  1031.     )) {
  1032.       // right-clicked on an image while the context menu is shown for something else
  1033.       if (!ai.node && !Events.hoverData)
  1034.         Events.onMouseOver(e);
  1035.       Events.onMouseOverThrottled(true);
  1036.       if (ai.node) {
  1037.         ai.force = true;
  1038.         App.start();
  1039.         dropEvent(e);
  1040.       }
  1041.     } else if (p) {
  1042.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1043.     }
  1044.   },
  1045.  
  1046.   pierceShadow(node, x, y) {
  1047.     for (let root; (root = node.shadowRoot);) {
  1048.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1049.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1050.       const inner = root.elementFromPoint(x, y);
  1051.       if (!inner || inner === node)
  1052.         break;
  1053.       node = inner;
  1054.     }
  1055.     return node;
  1056.   },
  1057.  
  1058.   toggle(enable) {
  1059.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1060.     const passive = {passive: true, capture: true};
  1061.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1062.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1063.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1064.     window[onOff]('keydown', Events.onKeyDown, true); // override normal page listeners
  1065.     window[onOff]('keyup', Events.onKeyUp, true);
  1066.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false});
  1067.   },
  1068.  
  1069.   trackMouse(e) {
  1070.     const cx = ai.cx = e.clientX;
  1071.     const cy = ai.cy = e.clientY;
  1072.     const r = ai.rect || (ai.rect = Calc.rect());
  1073.     ai.rectHovered =
  1074.       cx > r.left - 2 && cx < r.right + 2 &&
  1075.       cy > r.top - 2 && cy < r.bottom + 2;
  1076.   },
  1077.  
  1078.   zoomInOut(dir) {
  1079.     const i = Calc.scaleIndex(dir);
  1080.     const n = ai.scales.length;
  1081.     if (i >= 0 && i < n)
  1082.       ai.scale = ai.scales[i];
  1083.     const zo = cfg.zoomOut;
  1084.     if (i <= 0 && zo !== 'stay') {
  1085.       if (ai.scaleFit < ai.scale * .99) {
  1086.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1087.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1088.         App.deactivate({wait: true});
  1089.         return;
  1090.       }
  1091.       ai.zoomed = zo !== 'unzoom';
  1092.     } else {
  1093.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1094.     }
  1095.     if (ai.zooming)
  1096.       ai.popup.classList.add(`${PREFIX}zooming`);
  1097.     Popup.move();
  1098.     Bar.updateDetails();
  1099.   },
  1100. };
  1101.  
  1102. const Gallery = {
  1103.  
  1104.   makeParser(g) {
  1105.     return isFunction(g) ? g : Gallery.defaultParser;
  1106.   },
  1107.  
  1108.   findIndex(gUrl) {
  1109.     const sel = gUrl.split('#')[1];
  1110.     if (!sel)
  1111.       return 0;
  1112.     if (/^\d+$/.test(sel))
  1113.       return parseInt(sel);
  1114.     for (let i = ai.gNum; i--;) {
  1115.       let {url} = ai.gItems[i];
  1116.       if (Array.isArray(url))
  1117.         url = url[0];
  1118.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1119.         return i;
  1120.     }
  1121.     return 0;
  1122.   },
  1123.  
  1124.   next(dir) {
  1125.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1126.     const item = ai.gItems[ai.gIndex];
  1127.     if (Array.isArray(item.url)) {
  1128.       ai.urls = item.url.slice(1);
  1129.       ai.url = item.url[0];
  1130.     } else {
  1131.       ai.urls = null;
  1132.       ai.url = item.url;
  1133.     }
  1134.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1135.     App.startSingle();
  1136.     Bar.updateName();
  1137.   },
  1138.  
  1139.   nextIndex(dir) {
  1140.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1141.   },
  1142.  
  1143.   defaultParser(text, doc, docUrl, m, rule) {
  1144.     const {g} = rule;
  1145.     const qEntry = g.entry;
  1146.     const qCaption = ensureArray(g.caption);
  1147.     const qImage = g.image || 'img';
  1148.     const qTitle = g.title;
  1149.     const fix =
  1150.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1151.       (s => s.trim());
  1152.     const items = [...$$(qEntry || qImage, doc)]
  1153.       .map(processEntry)
  1154.       .filter(Boolean);
  1155.     items.title = processTitle();
  1156.     items.index =
  1157.       typeof g.index === 'string' &&
  1158.         Req.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1159.       RX_HAS_CODE.test(g.index) &&
  1160.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1161.       g.index;
  1162.     return items;
  1163.  
  1164.     function processEntry(entry) {
  1165.       const item = {};
  1166.       try {
  1167.         const img = qEntry ? $(qImage, entry) : entry;
  1168.         item.url = fix(Req.findImageUrl(img, docUrl), true);
  1169.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1170.       } catch (e) {}
  1171.       return item.url && item;
  1172.     }
  1173.  
  1174.     function processCaption(selector) {
  1175.       const el = $(selector, this) ||
  1176.                  $orSelf(selector, this.previousElementSibling) ||
  1177.                  $orSelf(selector, this.nextElementSibling);
  1178.       return el && fix(el.textContent);
  1179.     }
  1180.  
  1181.     function processTitle() {
  1182.       const el = $(qTitle, doc);
  1183.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1184.     }
  1185.  
  1186.     function $orSelf(selector, el) {
  1187.       if (el && !el.matches(qEntry))
  1188.         return el.matches(selector) ? el : $(selector, el);
  1189.     }
  1190.   },
  1191. };
  1192.  
  1193. const Menu = window === top && GM.registerMenuCommand && {
  1194.   curAltName: '',
  1195.   unreg: GM.unregisterMenuCommand,
  1196.   makeAltName: () => Menu.unreg
  1197.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1198.     : 'MPIV: toggle auto-start',
  1199.   register() {
  1200.     GM.registerMenuCommand('MPIV: configure', setup);
  1201.     Menu.registerAlt();
  1202.   },
  1203.   registerAlt() {
  1204.     if (cfg.startAltShown) {
  1205.       Menu.curAltName = Menu.makeAltName();
  1206.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1207.     }
  1208.   },
  1209.   reRegisterAlt() {
  1210.     const old = Menu.curAltName;
  1211.     if (old && Menu.unreg) Menu.unreg(old);
  1212.     if (!old || Menu.unreg) Menu.registerAlt();
  1213.   },
  1214.   onAltToggled() {
  1215.     const wasAuto = cfg.start === 'auto';
  1216.     if (wasAuto) {
  1217.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1218.     } else {
  1219.       cfg.startAlt = cfg.start;
  1220.       cfg.start = 'auto';
  1221.     }
  1222.     Menu.reRegisterAlt();
  1223.   },
  1224. };
  1225.  
  1226. const Popup = {
  1227.  
  1228.   async create(src, pageUrl, error) {
  1229.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1230.       (ai.popup.dataset.galleryFlip = '') === '';
  1231.     Popup.destroy();
  1232.     ai.imageUrl = src;
  1233.     if (!src)
  1234.       return;
  1235.     const myAi = ai;
  1236.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1237.     if (ai !== myAi)
  1238.       return;
  1239.     if (!xhr && error) {
  1240.       App.handleError(error);
  1241.       return;
  1242.     }
  1243.     Object.assign(ai, {pageUrl, xhr});
  1244.     if (xhr)
  1245.       [src, isVideo] = await Req.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1246.     if (ai !== myAi || !src)
  1247.       return;
  1248.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1249.     p.id = `${PREFIX}popup`;
  1250.     p.src = src;
  1251.     p.addEventListener('error', App.handleError);
  1252.     if (ai.zooming)
  1253.       p.addEventListener('transitionend', Popup.onZoom);
  1254.     if (inGallery) {
  1255.       p.dataset.galleryFlip = '';
  1256.       p.setAttribute('loaded', '');
  1257.     }
  1258.     doc.body.insertBefore(p, ai.bar || undefined);
  1259.     await 0;
  1260.     if (App.checkProgress({start: true}) === false)
  1261.       return;
  1262.     if (p.complete)
  1263.       Popup.onLoad.call(ai.popup);
  1264.     else if (!isVideo)
  1265.       p.addEventListener('load', Popup.onLoad, {once: true});
  1266.   },
  1267.  
  1268.   destroy() {
  1269.     const p = ai.popup;
  1270.     if (!p) return;
  1271.     p.removeEventListener('load', Popup.onLoad);
  1272.     p.removeEventListener('error', App.handleError);
  1273.     if (isFunction(p.pause))
  1274.       p.pause();
  1275.     if (ai.blobUrl)
  1276.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1277.     p.remove();
  1278.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1279.   },
  1280.  
  1281.   move() {
  1282.     let x, y;
  1283.     const {cx, cy, extras, view} = ai;
  1284.     const vw = view.w - extras.outw;
  1285.     const vh = view.h - extras.outh;
  1286.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1287.     const h0 = ai.scale * ai.nheight + extras.inh;
  1288.     const isSwapped = ai.rotate % 180;
  1289.     const w = isSwapped ? h0 : w0;
  1290.     const h = isSwapped ? w0 : h0;
  1291.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1292.       const r = ai.rect;
  1293.       const rx = (r.left + r.right) / 2;
  1294.       const ry = (r.top + r.bottom) / 2;
  1295.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1296.         if (h < vh - 60)
  1297.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1298.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1299.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1300.         if (w < vw - 60)
  1301.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1302.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1303.       }
  1304.     }
  1305.     if (x == null) {
  1306.       x = vw > w
  1307.         ? (vw - w) / 2 + view.x
  1308.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1309.     }
  1310.     if (y == null) {
  1311.       y = vh > h
  1312.         ? (vh - h) / 2 + view.y
  1313.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1314.     }
  1315.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1316.     x += extras.o - diff;
  1317.     y += extras.o + diff;
  1318.     $css(ai.popup, {
  1319.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1320.                  `rotate(${ai.rotate || 0}deg) ` +
  1321.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1322.       width: `${Math.round(w0)}px`,
  1323.       height: `${Math.round(h0)}px`,
  1324.     });
  1325.   },
  1326.  
  1327.   onLoad() {
  1328.     if (this === ai.popup) {
  1329.       this.setAttribute('loaded', '');
  1330.       ai.popupLoaded = true;
  1331.       Status.set('-loading');
  1332.       if (ai.preloadUrl) {
  1333.         $create('img', {src: ai.preloadUrl});
  1334.         ai.preloadUrl = null;
  1335.       }
  1336.     }
  1337.   },
  1338.  
  1339.   onZoom() {
  1340.     this.classList.remove(`${PREFIX}zooming`);
  1341.   },
  1342. };
  1343.  
  1344. const PopupVideo = {
  1345.   async create() {
  1346.     ai.bufBar = false;
  1347.     ai.bufStart = now();
  1348.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1349.     return $create('video', {
  1350.       autoplay: true,
  1351.       controls: shouldMute,
  1352.       muted: shouldMute,
  1353.       loop: true,
  1354.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1355.       onprogress: PopupVideo.progress,
  1356.       oncanplaythrough: PopupVideo.progressDone,
  1357.       onvolumechange: PopupVideo.rememberVolume,
  1358.     });
  1359.   },
  1360.  
  1361.   progress() {
  1362.     const {duration} = this;
  1363.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1364.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1365.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1366.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1367.     }
  1368.   },
  1369.  
  1370.   progressDone() {
  1371.     this.onprogress = this.oncanplaythrough = null;
  1372.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1373.       Bar.set(false);
  1374.     Popup.onLoad.call(this);
  1375.   },
  1376.  
  1377.   rememberVolume() {
  1378.     GM.setValue('volume', this.volume);
  1379.   },
  1380. };
  1381.  
  1382. const Ruler = {
  1383. /*
  1384.  'u' works only with URLs so it's ignored if 'html' is true
  1385.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1386.    |foo = url or text must start with foo
  1387.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1388.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1389.  'r' is checked only if 'u' matches first
  1390. */
  1391.   init() {
  1392.     const errors = new Map();
  1393.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1394.     const hasGMAE = typeof GM_addElement === 'function';
  1395.     const canEval = nonce || hasGMAE;
  1396.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1397.     const evalRules = [];
  1398.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1399.     for (const [rule, err] of errors.entries()) {
  1400.       if (!RX_EVAL_BLOCKED.test(err)) {
  1401.         App.handleError('Invalid custom host rule:', rule);
  1402.         continue;
  1403.       }
  1404.       if (canEval) {
  1405.         evalCode.push(evalRules.length ? ',' : '',
  1406.           '[', customRules.indexOf(rule), ',{',
  1407.           ...Object.keys(FN_ARGS)
  1408.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1409.             .filter(Boolean),
  1410.           '}]');
  1411.       }
  1412.       evalRules.push(rule);
  1413.     }
  1414.     if (evalRules.length) {
  1415.       let result, wnd;
  1416.       if (canEval) {
  1417.         const GMAE = hasGMAE
  1418.           ? GM_addElement // eslint-disable-line no-undef
  1419.           : (tag, {textContent}) => document.head.appendChild(
  1420.             Object.assign(document.createElement(tag), {
  1421.               textContent: TRUSTED.createScript(textContent),
  1422.               nonce,
  1423.             }));
  1424.         evalCode.push(']; document.currentScript.remove();');
  1425.         GMAE('script', {textContent: evalCode.join('')});
  1426.         result = (wnd = unsafeWindow)[evalId] ||
  1427.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1428.       }
  1429.       if (result) {
  1430.         for (const [index, fns] of result) {
  1431.           Object.assign(customRules[index], fns);
  1432.         }
  1433.         delete wnd[evalId];
  1434.       } else {
  1435.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1436.       }
  1437.     }
  1438.  
  1439.     // rules that disable previewing
  1440.     const disablers = [
  1441.       dotDomain.endsWith('.stackoverflow.com') && {
  1442.         e: '.post-tag, .post-tag img',
  1443.         s: '',
  1444.       },
  1445.     ];
  1446.  
  1447.     // optimization: a rule is created only when on domain
  1448.     const perDomain = [
  1449.       hostname.includes('startpage') && {
  1450.         r: /\boiu=(.+)/,
  1451.         s: '$1',
  1452.         follow: true,
  1453.       },
  1454.       dotDomain.endsWith('.4chan.org') && {
  1455.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1456.         q: '.op .fileText a',
  1457.         css: '#post-preview{display:none}',
  1458.       },
  1459.       hostname.includes('amazon.') && {
  1460.         r: /.+?images\/I\/.+?\./,
  1461.         s: m => {
  1462.           const uh = doc.getElementById('universal-hover');
  1463.           return uh ? '' : m[0] + 'jpg';
  1464.         },
  1465.         css: '#zoomWindow{display:none!important;}',
  1466.       },
  1467.       dotDomain.endsWith('.bing.com') && {
  1468.         e: 'a[m*="murl"]',
  1469.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1470.         s: '$1',
  1471.         html: true,
  1472.       },
  1473.       ...dotDomain.endsWith('.deviantart.com') && [{
  1474.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1475.         s: (m, node) =>
  1476.           $propUp(node, 'data-super-full-img') ||
  1477.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1478.           node.dataset.embedId && node.src,
  1479.       }, {
  1480.         e: '.dev-view-deviation img',
  1481.         s: () => [
  1482.           $('.dev-page-download').href,
  1483.           $('.dev-content-full').src,
  1484.         ].filter(Boolean),
  1485.       }, {
  1486.         e: 'a[data-hook=deviation_link]',
  1487.         q: 'link[as=image]',
  1488.       }] || [],
  1489.       dotDomain.endsWith('.discord.com') && {
  1490.         u: '||discordapp.net/external/',
  1491.         r: /\/https?\/(.+)/,
  1492.         s: '//$1',
  1493.         follow: true,
  1494.       },
  1495.       dotDomain.endsWith('.dropbox.com') && {
  1496.         r: /(.+?&size_mode)=\d+(.*)/,
  1497.         s: '$1=5$2',
  1498.       },
  1499.       dotDomain.endsWith('.facebook.com') && {
  1500.         e: 'a[href*="ref=hovercard"]',
  1501.         s: (m, node) =>
  1502.           'https://www.facebook.com/photo.php?fbid=' +
  1503.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1504.         follow: true,
  1505.       },
  1506.       dotDomain.endsWith('.facebook.com') && {
  1507.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1508.         s: (m, node) =>
  1509.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1510.             decodeURIComponent(m[4]),
  1511.         html: true,
  1512.         follow: true,
  1513.       },
  1514.       dotDomain.endsWith('.flickr.com') &&
  1515.       pick(unsafeWindow, 'YUI_config.flickr.api.site_key') && {
  1516.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1517.         s: m => `https://www.flickr.com/services/rest/?${
  1518.           new URLSearchParams({
  1519.             photo_id: m[1],
  1520.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1521.             method: 'flickr.photos.getSizes',
  1522.             format: 'json',
  1523.             nojsoncallback: 1,
  1524.           }).toString()}`,
  1525.         q: text => JSON.parse(text).sizes.size.pop().source,
  1526.         anonymous: true,
  1527.       },
  1528.       dotDomain.endsWith('.github.com') && {
  1529.         r: new RegExp([
  1530.           /(avatars.+?&s=)\d+/,
  1531.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1532.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1533.         ].map(rx => rx.source).join('|')),
  1534.         s: m => `https://${
  1535.           m[1] ? `${m[1]}460` :
  1536.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1537.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1538.         }`,
  1539.       },
  1540.       isGoogleImages && {
  1541.         e: 'a[href*="imgres?imgurl="] img',
  1542.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1543.         follow: true,
  1544.       },
  1545.       isGoogleImages && {
  1546.         e: '[data-tbnid] a:not([href])',
  1547.         s: (m, a) => {
  1548.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1549.           new MutationObserver((_, mo) => {
  1550.             mo.disconnect();
  1551.             App.isEnabled = true;
  1552.             a.alt = a2.innerText;
  1553.             const {left, top} = a.getBoundingClientRect();
  1554.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1555.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1556.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1557.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1558.         },
  1559.       },
  1560.       dotDomain.endsWith('.instagram.com') && {
  1561.         e: 'a[href*="/p/"],' +
  1562.           'article [role="button"][tabindex="0"],' +
  1563.           'article [role="button"][tabindex="0"] div',
  1564.         s: (m, node, rule) => {
  1565.           let data, a, n, img, src;
  1566.           if (location.pathname.startsWith('/p/')) {
  1567.             img = $('img[srcset], video', node.parentNode);
  1568.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1569.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1570.           }
  1571.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1572.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1573.           }
  1574.           const numPics = a && pick(data, 'edge_sidecar_to_children.edges.length') ||
  1575.             a && pick(data, 'carousel_media_count');
  1576.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1577.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1578.           rule.follow = !data && !rule.g;
  1579.           rule._data = data;
  1580.           rule._img = img;
  1581.           return (
  1582.             !a && !src ? false :
  1583.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1584.                 data.video_url || data.display_url);
  1585.         },
  1586.         c: (html, doc, node, rule) =>
  1587.           rule._getCaption(rule._data) || (rule._img || 0).alt || '',
  1588.         follow: true,
  1589.         _q: 'meta[property="og:video"]',
  1590.         _g(text, doc, url, m, rule) {
  1591.           const json = tryJSON(text);
  1592.           const media =
  1593.             pick(json, 'graphql.shortcode_media') ||
  1594.             pick(json, 'items[0]');
  1595.           const items =
  1596.             pick(media, 'edge_sidecar_to_children.edges', res => res.map(e => ({
  1597.               url: e.node.video_url || e.node.display_url,
  1598.             }))) ||
  1599.             pick(media, 'carousel_media', res => res.map(e => ({
  1600.               url: pick(e, 'video_versions[0].url') || pick(e, 'image_versions2.candidates[0].url'),
  1601.             })));
  1602.           items.title = rule._getCaption(media) || '';
  1603.           return items;
  1604.         },
  1605.         _getCaption: data => pick(data, 'caption.text') ||
  1606.           pick(data, 'edge_media_to_caption.edges[0].node.text'),
  1607.       },
  1608.       ...dotDomain.endsWith('.reddit.com') && [{
  1609.         u: '||i.reddituploads.com/',
  1610.       }, {
  1611.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1612.         s: (m, node) => $propUp(node, 'data-url'),
  1613.       }, {
  1614.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1615.         s: 'https://i$1',
  1616.       }] || [],
  1617.       dotDomain.endsWith('.tumblr.com') && {
  1618.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1619.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1620.         follow: true,
  1621.       },
  1622.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1623.         e: 'a.media-item, a.js-media-image-link',
  1624.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1625.         follow: true,
  1626.       },
  1627.       dotDomain.endsWith('.twitter.com') && {
  1628.         e: '.grid-tweet > .media-overlay',
  1629.         s: (m, node) => node.previousElementSibling.src,
  1630.         follow: true,
  1631.       },
  1632.     ];
  1633.  
  1634.     const main = [
  1635.       {
  1636.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1637.         s: '$1',
  1638.         follow: true,
  1639.         onerror: 'skip',
  1640.       },
  1641.       {
  1642.         u: [
  1643.           '||500px.com/photo/',
  1644.           '||cl.ly/',
  1645.           '||cweb-pix.com/',
  1646.           '//ibb.co/',
  1647.           '||imgcredit.xyz/image/',
  1648.         ],
  1649.         r: /\.\w+\/.+/,
  1650.         q: 'meta[property="og:image"]',
  1651.       },
  1652.       {
  1653.         u: 'attachment.php',
  1654.         r: /attachment\.php.+attachmentid/,
  1655.       },
  1656.       {
  1657.         u: '||abload.de/image',
  1658.         q: '#image',
  1659.       },
  1660.       {
  1661.         u: '||deviantart.com/art/',
  1662.         s: (m, node) =>
  1663.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1664.             '' :
  1665.             m.input,
  1666.         q: [
  1667.           '#download-button[href*=".jpg"]',
  1668.           '#download-button[href*=".jpeg"]',
  1669.           '#download-button[href*=".gif"]',
  1670.           '#download-button[href*=".png"]',
  1671.           '#gmi-ResViewSizer_fullimg',
  1672.           'img.dev-content-full',
  1673.         ],
  1674.       },
  1675.       {
  1676.         u: '||dropbox.com/s',
  1677.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1678.         q: (text, doc) =>
  1679.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1680.       },
  1681.       {
  1682.         r: /[./]ebay\.[^/]+\/itm\//,
  1683.         q: text =>
  1684.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1685.             .replace(/~~60_\d+/, '~~60_57'),
  1686.       },
  1687.       {
  1688.         u: '||i.ebayimg.com/',
  1689.         s: (m, node) =>
  1690.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1691.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1692.       },
  1693.       {
  1694.         u: '||fastpic.',
  1695.         e: 'a[href*="fastpic"]',
  1696.         s: m => m[0].replace('http:', 'https:').replace('fastpic.ru', 'fastpic.org'),
  1697.         q: 'img[src*="/big/"]',
  1698.       },
  1699.       {
  1700.         u: '||facebook.com/',
  1701.         r: /photo\.php|[^/]+\/photos\//,
  1702.         s: (m, node) =>
  1703.           node.id === 'fbPhotoImage' ? false :
  1704.             /gradient\.png$/.test(m.input) ? '' :
  1705.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1706.         q: [
  1707.           'div + span > a:first-child:not([href*="tag_faces"])',
  1708.           'div + span > a[href*="tag_faces"] ~ a',
  1709.         ],
  1710.         rect: '#fbProfileCover',
  1711.       },
  1712.       {
  1713.         u: '||fbcdn.',
  1714.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1715.         s: m =>
  1716.           dotDomain.endsWith('.facebook.com') &&
  1717.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1718.           false,
  1719.         manual: true,
  1720.       },
  1721.       {
  1722.         u: ['||fbcdn-', 'fbcdn.net/'],
  1723.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1724.         s: (m, node) => {
  1725.           if (node.id === 'fbPhotoImage') {
  1726.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1727.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1728.           }
  1729.           if (m[4])
  1730.             return false;
  1731.           const pn = node.parentNode;
  1732.           if (pn.outerHTML.includes('/hovercard/'))
  1733.             return '';
  1734.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1735.             return false;
  1736.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1737.         },
  1738.         rect: '.photoWrap',
  1739.       },
  1740.       {
  1741.         u: '||flickr.com/photos/',
  1742.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1743.         s: m =>
  1744.           m.input.indexOf('/sizes/') < 0 ?
  1745.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1746.             false,
  1747.         q: (text, doc) => {
  1748.           const links = $$('.sizes-list a', doc);
  1749.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1750.         },
  1751.         follow: true,
  1752.       },
  1753.       {
  1754.         u: '||flickr.com/photos/',
  1755.         r: /\/sizes\//,
  1756.         q: '#allsizes-photo > img',
  1757.       },
  1758.       {
  1759.         u: '||gfycat.com/',
  1760.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1761.         s: 'https://$1$3',
  1762.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1763.       },
  1764.       {
  1765.         u: [
  1766.           '||googleusercontent.com/proxy',
  1767.           '||googleusercontent.com/gadgets/proxy',
  1768.         ],
  1769.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1770.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1771.       },
  1772.       {
  1773.         u: [
  1774.           '||googleusercontent.com/',
  1775.           '||ggpht.com/',
  1776.         ],
  1777.         s: m => m.input.includes('webcache.') ? '' :
  1778.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1779.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1780.       },
  1781.       {
  1782.         u: '||gravatar.com/',
  1783.         r: /([a-z0-9]{32})/,
  1784.         s: 'https://gravatar.com/avatar/$1?s=200',
  1785.       },
  1786.       {
  1787.         u: '//gyazo.com/',
  1788.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1789.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1790.         _q: 'meta[name="twitter:image"]',
  1791.       },
  1792.       {
  1793.         u: '||hostingkartinok.com/show-image.php',
  1794.         q: '.image img',
  1795.       },
  1796.       {
  1797.         u: [
  1798.           '||imagecurl.com/images/',
  1799.           '||imagecurl.com/viewer.php',
  1800.         ],
  1801.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1802.         s: 'https://imagecurl.com/images/$1$2$3',
  1803.       },
  1804.       {
  1805.         u: '||imagebam.com/image/',
  1806.         q: 'meta[property="og:image"]',
  1807.         tabfix: true,
  1808.         xhr: hostname.includes('planetsuzy'),
  1809.       },
  1810.       {
  1811.         u: '||imageban.ru/thumbs',
  1812.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1813.         s: '$1out$2/$3/$4',
  1814.       },
  1815.       {
  1816.         u: [
  1817.           '||imageban.ru/show',
  1818.           '||imageban.net/show',
  1819.           '||ibn.im/',
  1820.         ],
  1821.         q: '#img_main',
  1822.       },
  1823.       {
  1824.         u: '||imageshack.us/img',
  1825.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1826.         s: 'https://$2/download/$1/$3$4',
  1827.       },
  1828.       {
  1829.         u: '||imageshack.us/i/',
  1830.         q: '#share-dl',
  1831.       },
  1832.       {
  1833.         u: '||imageteam.org/img',
  1834.         q: 'img[alt="image"]',
  1835.       },
  1836.       {
  1837.         u: [
  1838.           '||imagetwist.com/',
  1839.           '||imageshimage.com/',
  1840.         ],
  1841.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1842.         q: 'img.pic',
  1843.         xhr: true,
  1844.       },
  1845.       {
  1846.         u: '||imageupper.com/i/',
  1847.         q: '#img',
  1848.         xhr: true,
  1849.       },
  1850.       {
  1851.         u: '||imagevenue.com/',
  1852.         q: 'a[data-toggle="full"] img',
  1853.       },
  1854.       {
  1855.         u: '||imagezilla.net/show/',
  1856.         q: '#photo',
  1857.         xhr: true,
  1858.       },
  1859.       {
  1860.         u: [
  1861.           '||images-na.ssl-images-amazon.com/images/',
  1862.           '||media-imdb.com/images/',
  1863.         ],
  1864.         r: /images\/.+?\.jpg/,
  1865.         s: '/V1\\.?_.+?\\.//g',
  1866.       },
  1867.       {
  1868.         u: '||imgbox.com/',
  1869.         r: /\.com\/([a-z0-9]+)$/i,
  1870.         q: '#img',
  1871.         xhr: hostname !== 'imgbox.com',
  1872.       },
  1873.       {
  1874.         u: '||imgclick.net/',
  1875.         r: /\.net\/(\w+)/,
  1876.         q: 'img.pic',
  1877.         xhr: true,
  1878.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1879.       },
  1880.       {
  1881.         u: '.imgcredit.xyz/',
  1882.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1883.         s: ['https$1$2', 'https$1.png'],
  1884.       },
  1885.       {
  1886.         u: [
  1887.           '||imgflip.com/i/',
  1888.           '||imgflip.com/gif/',
  1889.         ],
  1890.         r: /\/(i|gif)\/([^/?#]+)/,
  1891.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1892.       },
  1893.       {
  1894.         u: [
  1895.           '||imgur.com/a/',
  1896.           '||imgur.com/gallery/',
  1897.         ],
  1898.         s: 'gallery', // suppressing an unused network request for remote `document`
  1899.         g: async (text, doc, url, m, rule, node, cb) => {
  1900.           let u = `https://imgur.com/ajaxalbums/getimages/${ai.url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1901.           let info = tryJSON((await Req.gmXhr(u)).responseText) || 0;
  1902.           let images = (info.data || 0).images || [];
  1903.           if (!images[0]) {
  1904.             info = (await Req.gmXhr(ai.url)).responseText.match(/postDataJSON=(".*?")<|$/)[1];
  1905.             info = tryJSON(tryJSON(info)) || 0;
  1906.             images = info.media;
  1907.           }
  1908.           const items = [];
  1909.           for (const img of images) {
  1910.             const meta = img.metadata || img;
  1911.             items.push({
  1912.               url: img.url ||
  1913.                 (u = `https://i.imgur.com/${img.hash}`) && (
  1914.                   img.ext === '.gif' && img.animated !== false ?
  1915.                     [`${u}.webm`, `${u}.mp4`, u] :
  1916.                     u + img.ext
  1917.                 ),
  1918.               desc: [meta.title, meta.description].filter(Boolean).join(' - '),
  1919.             });
  1920.           }
  1921.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1922.             items.title = info.title;
  1923.           cb(items);
  1924.         },
  1925.         css: '.post > .hover { display:none!important; }',
  1926.       },
  1927.       {
  1928.         u: '||imgur.com/',
  1929.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1930.         s: 'gallery',
  1931.         g: (text, doc, url, m) =>
  1932.           m[2].split(',').map(id => ({
  1933.             url: `https://i.${m[1]}${id}.jpg`,
  1934.           })),
  1935.       },
  1936.       {
  1937.         u: '||imgur.com/',
  1938.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1939.         s: (m, node) => {
  1940.           if (/memegen|random|register|search|signin/.test(m.input))
  1941.             return '';
  1942.           const a = node.closest('a');
  1943.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1944.             return false;
  1945.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1946.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1947.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1948.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1949.           return ext === 'webm' ?
  1950.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1951.             u + ext;
  1952.         },
  1953.       },
  1954.       {
  1955.         u: [
  1956.           '||instagr.am/p/',
  1957.           '||instagram.com/p/',
  1958.         ],
  1959.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1960.         q: m => (m = tryJSON(m)) && (
  1961.           m = pick(m, 'graphql.shortcode_media') || pick(m, 'items[0]') || 0
  1962.         ) && (
  1963.           m.video_url ||
  1964.           m.display_url ||
  1965.           pick(m, 'video_versions[0].url') ||
  1966.           pick(m, 'carousel_media[0].image_versions2.candidates[0].url') ||
  1967.           pick(m, 'image_versions2.candidates[0].url')
  1968.         ),
  1969.         rect: 'div.PhotoGridMediaItem',
  1970.         c: m => (m = tryJSON(m)) && (
  1971.           pick(m, 'items[0].caption.text') ||
  1972.           pick(m, 'graphql.shortcode_media.edge_media_to_caption.edges[0].node.text') ||
  1973.           ''
  1974.         ),
  1975.       },
  1976.       {
  1977.         u: [
  1978.           '||livememe.com/',
  1979.           '||lvme.me/',
  1980.         ],
  1981.         r: /\.\w+\/([^.]+)$/,
  1982.         s: 'http://i.lvme.me/$1.jpg',
  1983.       },
  1984.       {
  1985.         u: '||lostpic.net/image',
  1986.         q: '.image-viewer-image img',
  1987.       },
  1988.       {
  1989.         u: '||makeameme.org/meme/',
  1990.         r: /\/meme\/([^/?#]+)/,
  1991.         s: 'https://media.makeameme.org/created/$1.jpg',
  1992.       },
  1993.       {
  1994.         u: '||photobucket.com/',
  1995.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1996.         s: 'https://i$1$3',
  1997.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1998.       },
  1999.       {
  2000.         u: '||piccy.info/view3/',
  2001.         r: /(.+?\/view3)\/(.*)\//,
  2002.         s: '$1/$2/orig/',
  2003.         q: '#mainim',
  2004.       },
  2005.       {
  2006.         u: '||pimpandhost.com/image/',
  2007.         r: /(.+?\/image\/[0-9]+)/,
  2008.         s: '$1?size=original',
  2009.         q: 'img.original',
  2010.       },
  2011.       {
  2012.         u: [
  2013.           '||pixroute.com/',
  2014.           '||imgspice.com/',
  2015.         ],
  2016.         r: /\.html$/,
  2017.         q: 'img[id]',
  2018.         xhr: true,
  2019.       },
  2020.       {
  2021.         u: '||postima',
  2022.         r: /postima?ge?\.org\/image\/\w+/,
  2023.         q: [
  2024.           'a[href*="dl="]',
  2025.           '#main-image',
  2026.         ],
  2027.       },
  2028.       {
  2029.         u: [
  2030.           '||prntscr.com/',
  2031.           '||prnt.sc/',
  2032.         ],
  2033.         r: /\.\w+\/.+/,
  2034.         q: 'meta[property="og:image"]',
  2035.         xhr: true,
  2036.       },
  2037.       {
  2038.         u: '||radikal.ru/',
  2039.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2040.         s: (m, node, rule) =>
  2041.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2042.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2043.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2044.       },
  2045.       {
  2046.         u: '||tumblr.com',
  2047.         r: /_500\.jpg/,
  2048.         s: ['/_500/_1280/', ''],
  2049.       },
  2050.       {
  2051.         u: '||twimg.com/media/',
  2052.         r: /.+?format=(jpe?g|png|gif)/i,
  2053.         s: '$0&name=orig',
  2054.       },
  2055.       {
  2056.         u: '||twimg.com/media/',
  2057.         r: /.+?\.(jpe?g|png|gif)/i,
  2058.         s: '$0:orig',
  2059.       },
  2060.       {
  2061.         u: '||twimg.com/1/proxy',
  2062.         r: /t=([^&_]+)/i,
  2063.         s: m => atob(m[1]).match(/http.+/),
  2064.       },
  2065.       {
  2066.         u: '||twimg.com/',
  2067.         r: /\/profile_images/i,
  2068.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2069.       },
  2070.       {
  2071.         u: '||pic.twitter.com/',
  2072.         r: /\.com\/[a-z0-9]+/i,
  2073.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2074.         follow: true,
  2075.       },
  2076.       {
  2077.         u: '||twitpic.com/',
  2078.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2079.         s: 'https://twitpic.com/show/large/$2',
  2080.       },
  2081.       {
  2082.         u: '||wiki',
  2083.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  2084.         s: '/\\/thumb(?=\\/)|' +
  2085.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  2086.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  2087.         xhr: !hostname.includes('wiki'),
  2088.       },
  2089.       {
  2090.         u: '||ytimg.com/vi/',
  2091.         r: /(.+?\/vi\/[^/]+)/,
  2092.         s: '$1/0.jpg',
  2093.         rect: '.video-list-item',
  2094.       },
  2095.       {
  2096.         u: '/viewer.php?file=',
  2097.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2098.         s: '$1/images/$2',
  2099.         xhr: true,
  2100.       },
  2101.       {
  2102.         u: '/thumb_',
  2103.         r: /\/albums.+\/thumb_[^/]/,
  2104.         s: '/thumb_//',
  2105.       },
  2106.       {
  2107.         u: [
  2108.           '.th.jp',
  2109.           '.th.gif',
  2110.           '.th.png',
  2111.         ],
  2112.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2113.         s: '$1$2',
  2114.         follow: true,
  2115.       },
  2116.       {
  2117.         r: RX_MEDIA_URL,
  2118.       },
  2119.     ];
  2120.  
  2121.     /** @type mpiv.HostRule[] */
  2122.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2123.       .forEach(rule => {
  2124.         if (Array.isArray(rule.e))
  2125.           rule.e = rule.e.join(',');
  2126.       });
  2127.   },
  2128.  
  2129.   format(rule, {expand} = {}) {
  2130.     const s = Util.stringify(rule, null, ' ');
  2131.     return expand ?
  2132.       /* {"a": ...,
  2133.           "b": ...,
  2134.           "c": ...
  2135.          } */
  2136.       s.replace(/^{\s+/g, '{') :
  2137.       /* {"a": ..., "b": ..., "c": ...} */
  2138.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2139.   },
  2140.  
  2141.   fromElement(el) {
  2142.     const text = el.textContent.trim();
  2143.     if (text.startsWith('{') &&
  2144.         text.endsWith('}') &&
  2145.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2146.       const rule = tryJSON(text);
  2147.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2148.     }
  2149.   },
  2150.  
  2151.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2152.  
  2153.   /** @returns mpiv.HostRule | Error | false | undefined */
  2154.   parse(rule) {
  2155.     const isBatchOp = this instanceof Map;
  2156.     try {
  2157.       if (typeof rule === 'string')
  2158.         rule = JSON.parse(rule);
  2159.       if ('d' in rule && typeof rule.d !== 'string')
  2160.         rule.d = undefined;
  2161.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2162.         return false;
  2163.       if ('e' in rule) {
  2164.         let {e} = rule;
  2165.         if (typeof e === 'string') {
  2166.           e = e.trim();
  2167.         } else if (
  2168.           Array.isArray(e) && !e.every((s, i) => typeof s === 'string' && (e[i] = s.trim())) ||
  2169.           e && !Object.entries(e).filter(Ruler.isValidE2).length
  2170.         ) {
  2171.           throw new Error('Invalid syntax for "e". Examples: ' +
  2172.             '"e": ".image" or ' +
  2173.             '"e": [".image1", ".image2"] or ' +
  2174.             '"e": {".parent": ".image"} or ' +
  2175.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2176.         }
  2177.         if (isBatchOp) rule.e = e || undefined;
  2178.       }
  2179.       let compileTo = isBatchOp ? rule : {};
  2180.       if (rule.r)
  2181.         compileTo.r = new RegExp(rule.r, 'i');
  2182.       if (App.NOP)
  2183.         compileTo = {};
  2184.       for (const key of Object.keys(FN_ARGS)) {
  2185.         if (RX_HAS_CODE.test(rule[key])) {
  2186.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2187.           if (fn !== App.NOP || !isBatchOp) {
  2188.             compileTo[key] = fn;
  2189.           } else if (isBatchOp) {
  2190.             this.set(rule, 'unsafe-eval');
  2191.           }
  2192.         }
  2193.       }
  2194.       return rule;
  2195.     } catch (err) {
  2196.       if (isBatchOp) {
  2197.         this.set(rule, err);
  2198.         return rule;
  2199.       } else {
  2200.         return err;
  2201.       }
  2202.     }
  2203.   },
  2204.  
  2205.   runC(text, doc = document) {
  2206.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2207.     ai.caption = fn(text, doc);
  2208.   },
  2209.  
  2210.   runCHandler: {
  2211.     function: (text, doc) =>
  2212.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2213.     string: (text, doc) => {
  2214.       const el = $many(ai.rule.c, doc);
  2215.       return !el ? '' :
  2216.         el.getAttribute('content') ||
  2217.         el.getAttribute('title') ||
  2218.         el.textContent;
  2219.     },
  2220.     default: () =>
  2221.       (ai.tooltip || 0).text ||
  2222.       ai.node.alt ||
  2223.       $propUp(ai.node, 'title') ||
  2224.       Req.getFileName(
  2225.         ai.node.tagName === (ai.popup || 0).tagName
  2226.           ? ai.url
  2227.           : ai.node.src || $propUp(ai.node, 'href')),
  2228.   },
  2229.  
  2230.   runQ(text, doc, docUrl) {
  2231.     let url;
  2232.     if (isFunction(ai.rule.q)) {
  2233.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2234.       if (Array.isArray(url)) {
  2235.         ai.urls = url.slice(1);
  2236.         url = url[0];
  2237.       }
  2238.     } else {
  2239.       const el = $many(ai.rule.q, doc);
  2240.       url = Req.findImageUrl(el, docUrl);
  2241.     }
  2242.     return url;
  2243.   },
  2244.  
  2245.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2246.   runE(rule, node) {
  2247.     const {e} = rule;
  2248.     if (typeof e === 'string')
  2249.       return node.matches(e);
  2250.     let p, img, res, info;
  2251.     for (const selParent in e) {
  2252.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2253.         if (img === node)
  2254.           res = true;
  2255.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2256.           return info;
  2257.       }
  2258.     }
  2259.     return res;
  2260.   },
  2261.  
  2262.   /** @returns {?Array} if falsy then the rule should be skipped */
  2263.   runS(node, rule, m) {
  2264.     let urls = [];
  2265.     for (const s of ensureArray(rule.s))
  2266.       urls.push(
  2267.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2268.           isFunction(s) ? s(m, node, rule) :
  2269.             s);
  2270.     if (rule.q && urls.length > 1) {
  2271.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2272.       return;
  2273.     }
  2274.     if (Array.isArray(urls[0]))
  2275.       urls = urls[0];
  2276.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2277.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2278.   },
  2279.  
  2280.   /** @returns {boolean} */
  2281.   runU(rule, url) {
  2282.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2283.     return u.fn.call(u.data, url);
  2284.   },
  2285.  
  2286.   substituteSingle(s, m) {
  2287.     if (!m || m.input == null) return s;
  2288.     if (s.startsWith('/') && !s.startsWith('//')) {
  2289.       const mid = s.search(/[^\\]\//) + 1;
  2290.       const end = s.lastIndexOf('/');
  2291.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2292.       return m.input.replace(re, s.slice(mid + 1, end));
  2293.     }
  2294.     if (m.length && s.includes('$')) {
  2295.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2296.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2297.         for (let i = maxLength; i >= 0; i--) {
  2298.           const part = num.slice(0, i) | 0;
  2299.           if (part < m.length)
  2300.             return (m[part] || '') + num.slice(i);
  2301.         }
  2302.         return text;
  2303.       });
  2304.     }
  2305.     return s;
  2306.   },
  2307.  
  2308.   toggle(rule, prop, condition) {
  2309.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2310.     return condition;
  2311.   },
  2312. };
  2313.  
  2314. const RuleMatcher = {
  2315.  
  2316.   /** @returns {Object} */
  2317.   adaptiveFind(node, opts) {
  2318.     const tn = node.tagName;
  2319.     const src = node.currentSrc || node.src;
  2320.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2321.     let a, info, url;
  2322.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2323.     if (tn !== 'A') {
  2324.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2325.       info = RuleMatcher.find(url, node, opts);
  2326.     }
  2327.     if (!info && (a = node.closest('A'))) {
  2328.       const ds = a.dataset;
  2329.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2330.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2331.       url = !url.startsWith('data:') && url;
  2332.       info = RuleMatcher.find(url, a, opts);
  2333.     }
  2334.     if (!info && isPic)
  2335.       info = {node, rule: {}, url: src};
  2336.     return info;
  2337.   },
  2338.  
  2339.   /** @returns ?mpiv.RuleMatchInfo */
  2340.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2341.     const tn = node.tagName;
  2342.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2343.     const isPicOrLink = isPic || tn === 'A';
  2344.     let m, html, info;
  2345.     for (const rule of rules || Ruler.rules) {
  2346.       if (skipRules && skipRules.includes(rule) ||
  2347.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2348.           rule.e && !rules && !(info = Ruler.runE(rule, node)))
  2349.         continue;
  2350.       if (info && info.url)
  2351.         return info;
  2352.       if (rule.r)
  2353.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2354.           ? rule.r.exec(html || (html = node.outerHTML))
  2355.           : url && rule.r.exec(url);
  2356.       else if (url)
  2357.         m = Object.assign([url], {index: 0, input: url});
  2358.       else
  2359.         m = [];
  2360.       if (!m)
  2361.         continue;
  2362.       if (rule.s === '')
  2363.         return {};
  2364.       let hasS = rule.s != null;
  2365.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2366.       // but we'll only allow it to match rules without 's' in the nested find call
  2367.       if (isPic && !hasS && !skipRules)
  2368.         continue;
  2369.       hasS &= rule.s !== 'gallery';
  2370.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2371.       if (urls)
  2372.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2373.     }
  2374.   },
  2375.  
  2376.   /** @returns ?mpiv.RuleMatchInfo */
  2377.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2378.     let info;
  2379.     let url = `${urls[0]}`;
  2380.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2381.     if (url)
  2382.       url = Util.rel2abs(url);
  2383.     else
  2384.       info = {};
  2385.     if (follow)
  2386.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2387.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2388.       const xhr = cfg.xhr && rule.xhr;
  2389.       info = {
  2390.         match,
  2391.         node,
  2392.         rule,
  2393.         url,
  2394.         urls: urls.length > 1 ? urls.slice(1) : null,
  2395.         gallery: rule.g && Gallery.makeParser(rule.g),
  2396.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2397.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2398.       };
  2399.     }
  2400.     return info;
  2401.   },
  2402.  
  2403.   isFollowableUrl(url, rule) {
  2404.     const f = rule.follow;
  2405.     return isFunction(f) ? f(url) : f;
  2406.   },
  2407. };
  2408.  
  2409. const Req = {
  2410.  
  2411.   gmXhr(url, opts = {}) {
  2412.     if (ai.req)
  2413.       tryCatch.call(ai.req, ai.req.abort);
  2414.     return new Promise((resolve, reject) => {
  2415.       const {anonymous} = ai.rule || {};
  2416.       ai.req = GM.xmlHttpRequest(Object.assign({
  2417.         url,
  2418.         anonymous,
  2419.         withCredentials: !anonymous,
  2420.         method: 'GET',
  2421.         timeout: 30e3,
  2422.       }, opts, {
  2423.         onload: done,
  2424.         onerror: done,
  2425.         ontimeout() {
  2426.           ai.req = null;
  2427.           reject(`Timeout fetching ${url}`);
  2428.         },
  2429.       }));
  2430.       function done(r) {
  2431.         ai.req = null;
  2432.         if (r.status < 400 && !r.error)
  2433.           resolve(r);
  2434.         else
  2435.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2436.       }
  2437.     });
  2438.   },
  2439.  
  2440.   async getDoc(url) {
  2441.     if (!url) {
  2442.       // current document
  2443.       return {
  2444.         doc,
  2445.         finalUrl: location.href,
  2446.         responseText: doc.documentElement.outerHTML,
  2447.       };
  2448.     }
  2449.     const r = await (!ai.post ?
  2450.       Req.gmXhr(url) :
  2451.       Req.gmXhr(url, {
  2452.         method: 'POST',
  2453.         data: ai.post,
  2454.         headers: {
  2455.           'Content-Type': 'application/x-www-form-urlencoded',
  2456.           'Referer': url,
  2457.         },
  2458.       }));
  2459.     r.doc = $parseHtml(r.responseText);
  2460.     return r;
  2461.   },
  2462.  
  2463.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2464.     ai.bufBar = false;
  2465.     ai.bufStart = now();
  2466.     const response = await Req.gmXhr(url, {
  2467.       responseType: 'blob',
  2468.       headers: {
  2469.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2470.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2471.       },
  2472.       onprogress: Req.getImageProgress,
  2473.     });
  2474.     Bar.set(false);
  2475.     const type = Req.guessMimeType(response);
  2476.     let b = response.response;
  2477.     if (!b) throw 'Empty response';
  2478.     if (b.type !== type)
  2479.       b = b.slice(0, b.size, type);
  2480.     const res = xhr === 'blob'
  2481.       ? (ai.blobUrl = URL.createObjectURL(b))
  2482.       : await Req.blobToDataUrl(b);
  2483.     return [res, type.startsWith('video')];
  2484.   },
  2485.  
  2486.   getImageProgress(e) {
  2487.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2488.       ai.bufBar = true;
  2489.     if (ai.bufBar) {
  2490.       const pct = e.loaded / e.total * 100 | 0;
  2491.       const size = e.total / 1024 | 0;
  2492.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2493.     }
  2494.   },
  2495.  
  2496.   async findRedirect() {
  2497.     try {
  2498.       const {finalUrl} = await Req.gmXhr(ai.url, {
  2499.         method: 'HEAD',
  2500.         headers: {
  2501.           'Referer': location.href.split('#', 1)[0],
  2502.         },
  2503.       });
  2504.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2505.       if (!info || !info.url)
  2506.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2507.       Object.assign(ai, info);
  2508.       App.startSingle();
  2509.     } catch (e) {
  2510.       App.handleError(e);
  2511.     }
  2512.   },
  2513.  
  2514.   async saveFile() {
  2515.     const url = ai.popup.src || ai.popup.currentSrc;
  2516.     let name = Req.getFileName(ai.imageUrl || url);
  2517.     if (!name.includes('.'))
  2518.       name += '.jpg';
  2519.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2520.       $create('a', {href: url, download: name})
  2521.         .dispatchEvent(new MouseEvent('click'));
  2522.     } else {
  2523.       Status.set('+loading');
  2524.       const onload = () => Status.set('-loading');
  2525.       const gmDL = typeof GM_download === 'function';
  2526.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2527.         url,
  2528.         name,
  2529.         headers: {Referer: url},
  2530.         method: 'get', // polyfilling GM_download
  2531.         responseType: 'blob', // polyfilling GM_download
  2532.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2533.         onerror: e => {
  2534.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2535.           onload();
  2536.         },
  2537.         onprogress: Req.getImageProgress,
  2538.         onload({response}) {
  2539.           onload();
  2540.           if (!gmDL) { // polyfilling GM_download
  2541.             const a = Object.assign(document.createElement('a'), {
  2542.               href: URL.createObjectURL(response),
  2543.               download: name,
  2544.             });
  2545.             a.dispatchEvent(new MouseEvent('click'));
  2546.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2547.           }
  2548.         },
  2549.       });
  2550.     }
  2551.   },
  2552.  
  2553.   getFileName(url) {
  2554.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2555.   },
  2556.  
  2557.   blobToDataUrl(blob) {
  2558.     return new Promise((resolve, reject) => {
  2559.       const fr = new FileReader();
  2560.       fr.onload = () => resolve(fr.result);
  2561.       fr.onerror = reject;
  2562.       fr.readAsDataURL(blob);
  2563.     });
  2564.   },
  2565.  
  2566.   guessMimeType({responseHeaders, finalUrl}) {
  2567.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2568.         !RegExp.$1.includes('text/plain'))
  2569.       return RegExp.$1;
  2570.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2571.     switch (ext.toLowerCase()) {
  2572.       case 'bmp': return 'image/bmp';
  2573.       case 'gif': return 'image/gif';
  2574.       case 'jpe': return 'image/jpeg';
  2575.       case 'jpeg': return 'image/jpeg';
  2576.       case 'jpg': return 'image/jpeg';
  2577.       case 'mp4': return 'video/mp4';
  2578.       case 'png': return 'image/png';
  2579.       case 'svg': return 'image/svg+xml';
  2580.       case 'tif': return 'image/tiff';
  2581.       case 'tiff': return 'image/tiff';
  2582.       case 'webm': return 'video/webm';
  2583.       default: return 'application/octet-stream';
  2584.     }
  2585.   },
  2586.  
  2587.   findImageUrl(n, url) {
  2588.     if (!n) return;
  2589.     let html;
  2590.     const path =
  2591.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2592.       n.getAttribute('src') ||
  2593.       n.getAttribute('data-m4v') ||
  2594.       n.getAttribute('href') ||
  2595.       n.getAttribute('content') ||
  2596.       (html = n.outerHTML).includes('http') &&
  2597.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2598.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2599.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2600.   },
  2601. };
  2602.  
  2603. const Status = {
  2604.  
  2605.   set(status) {
  2606.     if (!status && !cfg.globalStatus) {
  2607.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2608.       return;
  2609.     }
  2610.     const prefix = cfg.globalStatus ? PREFIX : '';
  2611.     const action = status && /^[+-]/.test(status) && status[0];
  2612.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2613.     const el = cfg.globalStatus ? doc.documentElement :
  2614.       name === 'edge' ? ai.popup :
  2615.         ai.node;
  2616.     if (!el) return;
  2617.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2618.     const oldValue = (el.getAttribute(attr) || '').trim();
  2619.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2620.     switch (action) {
  2621.       case '-':
  2622.         cls.delete(name);
  2623.         break;
  2624.       case false:
  2625.         for (const c of cls)
  2626.           if (c.startsWith(prefix) && c !== name)
  2627.             cls.delete(c);
  2628.       // fallthrough to +
  2629.       case '+':
  2630.         if (name)
  2631.           cls.add(name);
  2632.         break;
  2633.     }
  2634.     const newValue = [...cls].join(' ');
  2635.     if (newValue !== oldValue)
  2636.       el.setAttribute(attr, newValue);
  2637.   },
  2638.  
  2639.   loading(force) {
  2640.     if (!force) {
  2641.       clearTimeout(ai.timerStatus);
  2642.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2643.     } else if (!ai.popupLoaded) {
  2644.       Status.set('+loading');
  2645.     }
  2646.   },
  2647. };
  2648.  
  2649. const UrlMatcher = (() => {
  2650.   // string-to-regexp escaped chars
  2651.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2652.   // rx for '^' symbol in simple url match
  2653.   const RX_SEP = /[^\w%._-]/y;
  2654.   const RXS_SEP = RX_SEP.source;
  2655.   return match => {
  2656.     const results = [];
  2657.     for (const s of ensureArray(match)) {
  2658.       const pinDomain = s.startsWith('||');
  2659.       const pinStart = !pinDomain && s.startsWith('|');
  2660.       const endSep = s.endsWith('^');
  2661.       let fn;
  2662.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2663.       if (needle.includes('^')) {
  2664.         let plain = '';
  2665.         for (const part of needle.split('^'))
  2666.           if (part.length > plain.length)
  2667.             plain = part;
  2668.         const rx = new RegExp(
  2669.           (pinStart ? '^' : '') +
  2670.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2671.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2672.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2673.         needle = [plain, rx];
  2674.         fn = regexp;
  2675.       } else if (pinStart) {
  2676.         fn = endSep ? equals : starts;
  2677.       } else if (pinDomain) {
  2678.         const slashPos = needle.indexOf('/');
  2679.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2680.         needle = [needle, domain, slashPos > 0, endSep];
  2681.         fn = startsDomainPrescreen;
  2682.       } else if (endSep) {
  2683.         fn = ends;
  2684.       } else {
  2685.         fn = has;
  2686.       }
  2687.       results.push({fn, data: needle});
  2688.     }
  2689.     return results.length > 1 ?
  2690.       {fn: checkArray, data: results} :
  2691.       results[0];
  2692.   };
  2693.   function checkArray(s) {
  2694.     return this.some(checkArrayItem, s);
  2695.   }
  2696.   function checkArrayItem(item) {
  2697.     return item.fn.call(item.data, this);
  2698.   }
  2699.   function ends(s) {
  2700.     return s.endsWith(this) || (
  2701.       s.length > this.length &&
  2702.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2703.       endsWithSep(s));
  2704.   }
  2705.   function endsWithSep(s, pos = s.length - 1) {
  2706.     RX_SEP.lastIndex = pos;
  2707.     return RX_SEP.test(s);
  2708.   }
  2709.   function equals(s) {
  2710.     return s.startsWith(this) && (
  2711.       s.length === this.length ||
  2712.       s.length === this.length + 1 && endsWithSep(s));
  2713.   }
  2714.   function has(s) {
  2715.     return s.includes(this);
  2716.   }
  2717.   function regexp(s) {
  2718.     return s.includes(this[0]) && this[1].test(s);
  2719.   }
  2720.   function starts(s) {
  2721.     return s.startsWith(this);
  2722.   }
  2723.   function startsDomainPrescreen(url) {
  2724.     return url.includes(this[0]) && startsDomain.call(this, url);
  2725.   }
  2726.   function startsDomain(url) {
  2727.     let hostStart = url.indexOf('//');
  2728.     if (hostStart && url[hostStart - 1] !== ':')
  2729.       return;
  2730.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2731.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2732.     const [needle, domain, pinDomainEnd, endSep] = this;
  2733.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2734.     for (; ; start++) {
  2735.       start = host.indexOf(domain, start);
  2736.       if (start < 0)
  2737.         return;
  2738.       if (!start || host[start - 1] === '.')
  2739.         break;
  2740.     }
  2741.     start += hostStart;
  2742.     if (url.lastIndexOf(needle, start) !== start)
  2743.       return;
  2744.     const end = start + needle.length;
  2745.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2746.   }
  2747. })();
  2748.  
  2749. const Util = {
  2750.  
  2751.   addStyle(name, css) {
  2752.     const id = `${PREFIX}style:${name}`;
  2753.     const el = doc.getElementById(id) ||
  2754.                css && $create('style', {id});
  2755.     if (!el) return;
  2756.     if (el.textContent !== css)
  2757.       el.textContent = css;
  2758.     if (el.parentElement !== doc.head)
  2759.       doc.head.appendChild(el);
  2760.     return el;
  2761.   },
  2762.  
  2763.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2764.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2765.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2766.   },
  2767.  
  2768.   decodeHtmlEntities(s) {
  2769.     return s
  2770.       .replace(/&quot;/g, '"')
  2771.       .replace(/&apos;/g, '\'')
  2772.       .replace(/&lt;/g, '<')
  2773.       .replace(/&gt;/g, '>')
  2774.       .replace(/&amp;/g, '&');
  2775.   },
  2776.  
  2777.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2778.   decodeUrl(url) {
  2779.     if (!url || typeof url !== 'string') return url;
  2780.     const iPct = url.indexOf('%');
  2781.     const iColon = url.indexOf(':');
  2782.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2783.       decodeURIComponent(url) :
  2784.       url;
  2785.   },
  2786.  
  2787.   deepEqual(a, b) {
  2788.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2789.       return a === b;
  2790.     if (Array.isArray(a)) {
  2791.       return Array.isArray(b) &&
  2792.         a.length === b.length &&
  2793.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2794.     }
  2795.     const keys = Object.keys(a);
  2796.     return keys.length === Object.keys(b).length &&
  2797.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2798.   },
  2799.  
  2800.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2801.  
  2802.   forceLayout(node) {
  2803.     // eslint-disable-next-line no-unused-expressions
  2804.     node.clientHeight;
  2805.   },
  2806.  
  2807.   formatError(e, rule) {
  2808.     const message =
  2809.       e.message ||
  2810.       e.readyState && 'Request failed.' ||
  2811.       e.type === 'error' && `File can't be displayed.${
  2812.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2813.       }` ||
  2814.       e;
  2815.     const m = [
  2816.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2817.       ['', 'font-weight:normal'],
  2818.     ];
  2819.     m.push(...[
  2820.       ['Node: %o', ai.node],
  2821.       ['Rule: %o', rule],
  2822.       ai.url && ['URL: %s', ai.url],
  2823.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2824.     ].filter(Boolean));
  2825.     return {
  2826.       message,
  2827.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2828.       consoleArgs: m.map(([, v]) => v),
  2829.     };
  2830.   },
  2831.  
  2832.   isHovered(el) {
  2833.     // doesn't work in image tabs, browser bug?
  2834.     return App.isImageTab || el.closest(':hover');
  2835.   },
  2836.  
  2837.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2838.  
  2839.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2840.  
  2841.   newFunction(...args) {
  2842.     try {
  2843.       return App.NOP || new Function(...args);
  2844.     } catch (e) {
  2845.       if (!RX_EVAL_BLOCKED.test(e.message))
  2846.         throw e;
  2847.       App.NOP = () => {};
  2848.       return App.NOP;
  2849.     }
  2850.   },
  2851.  
  2852.   rel2abs(rel, abs = location.href) {
  2853.     try {
  2854.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2855.         new URL(rel, abs).href;
  2856.     } catch (e) {
  2857.       return rel;
  2858.     }
  2859.   },
  2860.  
  2861.   stringify(...args) {
  2862.     const p = Array.prototype;
  2863.     const {toJSON} = p;
  2864.     if (toJSON) p.toJSON = null;
  2865.     const res = JSON.stringify(...args);
  2866.     if (toJSON) p.toJSON = toJSON;
  2867.     return res;
  2868.   },
  2869.  
  2870.   suppressTooltip() {
  2871.     for (const node of [
  2872.       ai.node.parentNode,
  2873.       ai.node,
  2874.       ai.node.firstElementChild,
  2875.     ]) {
  2876.       const t = (node || 0).title;
  2877.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2878.         ai.tooltip = {node, text: t};
  2879.         node.title = '';
  2880.         break;
  2881.       }
  2882.     }
  2883.   },
  2884.  
  2885.   tabFixUrl() {
  2886.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2887.            navigator.userAgent.includes('Gecko/') &&
  2888.            flattenHtml(`data:text/html;charset=utf8,
  2889.       <style>
  2890.         body {
  2891.           margin: 0;
  2892.           padding: 0;
  2893.           background: #222;
  2894.         }
  2895.         .fit {
  2896.           overflow: hidden
  2897.         }
  2898.         .fit > img {
  2899.           max-width: 100vw;
  2900.           max-height: 100vh;
  2901.         }
  2902.         body > img {
  2903.           margin: auto;
  2904.           position: absolute;
  2905.           left: 0;
  2906.           right: 0;
  2907.           top: 0;
  2908.           bottom: 0;
  2909.         }
  2910.       </style>
  2911.       <body class=fit>
  2912.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2913.       </body>
  2914.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2915.   },
  2916. };
  2917.  
  2918. async function setup({rule} = {}) {
  2919.   if (!isFunction(doc.body.attachShadow)) {
  2920.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2921.           'You can edit the script\'s storage directly in your userscript manager.');
  2922.     return;
  2923.   }
  2924.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2925.   let uiCfg;
  2926.   let root = (elConfig || 0).shadowRoot;
  2927.   let {blankRuleElement} = setup;
  2928.   /** @type NodeList */
  2929.   const UI = new Proxy({}, {
  2930.     get(_, id) {
  2931.       return root.getElementById(id);
  2932.     },
  2933.   });
  2934.   if (!rule || !elConfig)
  2935.     init(await Config.load({save: true}));
  2936.   if (rule)
  2937.     installRule(rule);
  2938.  
  2939.   function init(data) {
  2940.     uiCfg = data;
  2941.     $remove(elConfig);
  2942.     elConfig = $create('div', {contentEditable: true});
  2943.     root = elConfig.attachShadow({mode: 'open'});
  2944.     root.innerHTML = TRUSTED.createHTML(createConfigHtml());
  2945.     initEvents();
  2946.     renderAll();
  2947.     renderCustomScales();
  2948.     renderRules();
  2949.     doc.body.appendChild(elConfig);
  2950.     requestAnimationFrame(() => {
  2951.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2952.     });
  2953.   }
  2954.  
  2955.   function initEvents() {
  2956.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2957.     UI._export.onclick = e => {
  2958.       dropEvent(e);
  2959.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2960.       UI._exportNotification.hidden = false;
  2961.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2962.     };
  2963.     UI._import.onclick = e => {
  2964.       dropEvent(e);
  2965.       const s = prompt('Paste settings:');
  2966.       if (s)
  2967.         init(new Config({data: s}));
  2968.     };
  2969.     UI._install.onclick = setupRuleInstaller;
  2970.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2971.     UI._reveal.onclick = e => {
  2972.       e.preventDefault();
  2973.       cssApp.hidden = !cssApp.hidden;
  2974.       if (!cssApp.hidden) {
  2975.         if (!cssApp.value) {
  2976.           App.updateStyles();
  2977.           cssApp.value = App.globalStyle.trim();
  2978.           cssApp.setSelectionRange(0, 0);
  2979.         }
  2980.         cssApp.focus();
  2981.       }
  2982.     };
  2983.     UI.start.onchange = function () {
  2984.       UI.delay.closest('label').hidden =
  2985.         UI.preload.closest('label').hidden =
  2986.           this.value !== 'auto';
  2987.     };
  2988.     UI.start.onchange();
  2989.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2990.     // color
  2991.     for (const el of $$('[type="color"]', root)) {
  2992.       el.oninput = colorOnInput;
  2993.       el.elSwatch = el.nextElementSibling;
  2994.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2995.       el.elOpacity.elColor = el;
  2996.     }
  2997.     function colorOnInput() {
  2998.       this.elSwatch.style.setProperty('--color',
  2999.         Util.color(this.value, this.elOpacity.valueAsNumber));
  3000.     }
  3001.     // range
  3002.     for (const el of $$('[type="range"]', root)) {
  3003.       el.oninput = rangeOnInput;
  3004.       el.onblur = rangeOnBlur;
  3005.       el.addEventListener('focusin', rangeOnFocus);
  3006.     }
  3007.     function rangeOnBlur(e) {
  3008.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  3009.         this.elEdit.onblur(e);
  3010.     }
  3011.     function rangeOnFocus() {
  3012.       if (this.elEdit) return;
  3013.       const {min, max, step, value} = this;
  3014.       this.elEdit = $create('input', {
  3015.         value, min, max, step,
  3016.         className: 'range-edit',
  3017.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3018.         type: 'number',
  3019.         elRange: this,
  3020.         onblur: rangeEditOnBlur,
  3021.         oninput: rangeEditOnInput,
  3022.       });
  3023.       this.insertAdjacentElement('afterend', this.elEdit);
  3024.     }
  3025.     function rangeOnInput() {
  3026.       this.title = (this.dataset.title || '').replace('$', this.value);
  3027.       if (this.elColor) this.elColor.oninput();
  3028.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3029.     }
  3030.     // range-edit
  3031.     function rangeEditOnBlur(e) {
  3032.       if (e.relatedTarget !== this.elRange) {
  3033.         this.remove();
  3034.         this.elRange.elEdit = null;
  3035.       }
  3036.     }
  3037.     function rangeEditOnInput() {
  3038.       this.elRange.valueAsNumber = this.valueAsNumber;
  3039.       this.elRange.oninput();
  3040.     }
  3041.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3042.     // which may happen since it sees only the outer <div> in the event |target|
  3043.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3044.   }
  3045.  
  3046.   function closeSetup(event) {
  3047.     const isApply = this.id === '_apply';
  3048.     if (event && (this.id === '_ok' || isApply)) {
  3049.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3050.       Ruler.init();
  3051.       Menu.reRegisterAlt();
  3052.       if (isApply) {
  3053.         renderCustomScales();
  3054.         UI._css.textContent = cfg._getCss();
  3055.         return;
  3056.       }
  3057.     }
  3058.     $remove(elConfig);
  3059.     elConfig = null;
  3060.   }
  3061.  
  3062.   function collectConfig({save, clone} = {}) {
  3063.     let data = {};
  3064.     for (const el of $$('input[id], select[id]', root))
  3065.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3066.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3067.           el.value || '';
  3068.     Object.assign(data, {
  3069.       css: UI.css.value.trim(),
  3070.       delay: UI.delay.valueAsNumber * 1000,
  3071.       hosts: collectRules(),
  3072.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3073.       scales: UI.scales.value
  3074.         .trim()
  3075.         .split(/[,;]*\s+/)
  3076.         .map(x => x.replace(',', '.'))
  3077.         .filter(x => !isNaN(parseFloat(x))),
  3078.     });
  3079.     if (clone)
  3080.       data = JSON.parse(Util.stringify(data));
  3081.     return new Config({data, save});
  3082.   }
  3083.  
  3084.   function collectRules() {
  3085.     return [...UI._rules.children]
  3086.       .map(el => [el.value.trim(), el[RULE]])
  3087.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3088.       .map(([s, json]) => json || s)
  3089.       .filter(Boolean);
  3090.   }
  3091.  
  3092.   function checkRule({target: el}) {
  3093.     let json, error, title;
  3094.     const prev = el.previousElementSibling;
  3095.     if (el.value) {
  3096.       json = Ruler.parse(el.value);
  3097.       error = json instanceof Error && (json.message || String(json));
  3098.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3099.         !/^[-.a-z0-9]*$/i.test(json.d);
  3100.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3101.         .filter(Boolean).join('\n');
  3102.       el.classList.toggle('invalid-domain', invalidDomain);
  3103.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3104.       if (!prev)
  3105.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3106.     } else if (prev) {
  3107.       prev.focus();
  3108.       el.remove();
  3109.     }
  3110.     el[RULE] = !error && json;
  3111.     el.title = title;
  3112.     el.setCustomValidity(error || '');
  3113.   }
  3114.  
  3115.   async function focusRule({target: el, relatedTarget: from}) {
  3116.     if (el === this)
  3117.       return;
  3118.     await new Promise(setTimeout);
  3119.     if (el[RULE] && el.rows < 2) {
  3120.       let i = el.selectionStart;
  3121.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3122.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3123.       el.setSelectionRange(i, i);
  3124.       el.rows = txt.match(/^/gm).length;
  3125.     }
  3126.     if (!this.contains(from))
  3127.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3128.   }
  3129.  
  3130.   function installRule(rule) {
  3131.     const inputs = UI._rules.children;
  3132.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3133.     if (!el) {
  3134.       el = inputs[0];
  3135.       el[RULE] = rule;
  3136.       el.value = Ruler.format(rule);
  3137.       el.hidden = false;
  3138.       const i = Math.max(0, collectRules().indexOf(rule));
  3139.       inputs[i].insertAdjacentElement('afterend', el);
  3140.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3141.     }
  3142.     const rect = el.getBoundingClientRect();
  3143.     if (rect.bottom < 0 ||
  3144.         rect.bottom > el.parentNode.offsetHeight)
  3145.       el.scrollIntoView();
  3146.     el.classList.add('highlight');
  3147.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3148.     el.focus();
  3149.   }
  3150.  
  3151.   function renderRules() {
  3152.     const rules = UI._rules;
  3153.     rules.addEventListener('input', checkRule);
  3154.     rules.addEventListener('focusin', focusRule);
  3155.     rules.addEventListener('paste', focusRule);
  3156.     blankRuleElement =
  3157.       setup.blankRuleElement =
  3158.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3159.     for (const rule of uiCfg.hosts || []) {
  3160.       const el = blankRuleElement.cloneNode();
  3161.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3162.       rules.appendChild(el);
  3163.       checkRule({target: el});
  3164.     }
  3165.     const search = UI._search;
  3166.     search.oninput = () => {
  3167.       setup.search = search.value;
  3168.       const s = search.value.toLowerCase();
  3169.       for (const el of rules.children)
  3170.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3171.     };
  3172.     search.value = setup.search || '';
  3173.     if (search.value)
  3174.       search.oninput();
  3175.   }
  3176.  
  3177.   function renderCustomScales() {
  3178.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3179.   }
  3180.  
  3181.   function renderAll() {
  3182.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3183.       if (el.id in uiCfg)
  3184.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3185.     for (const el of $$('input[type="range"]', root))
  3186.       el.oninput();
  3187.     for (const el of $$('a[href^="http"]', root))
  3188.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3189.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3190.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3191.   }
  3192. }
  3193.  
  3194. function setupClickedRule(event) {
  3195.   let rule;
  3196.   const el = event.target.closest('blockquote, code, pre');
  3197.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3198.     dropEvent(event);
  3199.     setup({rule});
  3200.   }
  3201. }
  3202.  
  3203. async function setupRuleInstaller(e) {
  3204.   dropEvent(e);
  3205.   const parent = this.parentElement;
  3206.   parent.children._installLoading.hidden = false;
  3207.   this.remove();
  3208.   let rules;
  3209.  
  3210.   try {
  3211.     rules = extractRules(await Req.getDoc(this.href));
  3212.     const selector = $create('select', {
  3213.       size: 8,
  3214.       style: 'width: 100%',
  3215.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3216.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3217.     });
  3218.     selector.append(...rules.map(renderRule));
  3219.     selector.selectedIndex = findMatchingRuleIndex();
  3220.     parent.children._installLoading.remove();
  3221.     parent.children._installHint.hidden = false;
  3222.     parent.appendChild(selector);
  3223.     requestAnimationFrame(() => {
  3224.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3225.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3226.       selector.focus();
  3227.     });
  3228.   } catch (e) {
  3229.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3230.   }
  3231.  
  3232.   function extractRules({doc}) {
  3233.     // sort by name
  3234.     return [...$$('#wiki-body tr', doc)]
  3235.       .map(tr => [
  3236.         tr.cells[0].textContent.trim(),
  3237.         Ruler.fromElement(tr.cells[1]),
  3238.       ])
  3239.       .filter(([name, r]) =>
  3240.         name && r && (!r.d || hostname.includes(r.d)))
  3241.       .sort(([a], [b]) =>
  3242.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3243.           a > b ? 1 :
  3244.             0);
  3245.   }
  3246.  
  3247.   function findMatchingRuleIndex() {
  3248.     const dottedHost = `.${hostname}.`;
  3249.     let maxCount = 0, maxIndex = 0, index = 0;
  3250.     for (const [name, {d}] of rules) {
  3251.       let count = !!(d && hostname.includes(d)) * 10;
  3252.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3253.         count += dottedHost.includes(`.${part}.`) && part.length;
  3254.       if (count > maxCount) {
  3255.         maxCount = count;
  3256.         maxIndex = index;
  3257.       }
  3258.       index++;
  3259.     }
  3260.     return maxIndex;
  3261.   }
  3262.  
  3263.   function renderRule([name, rule]) {
  3264.     return $create('option', {
  3265.       textContent: name,
  3266.       title: Ruler.format(rule, {expand: true})
  3267.         .replace(/^{|\s*}$/g, '')
  3268.         .split('\n')
  3269.         .slice(0, 12)
  3270.         .map(renderTitleLine)
  3271.         .filter(Boolean)
  3272.         .join('\n'),
  3273.     });
  3274.   }
  3275.  
  3276.   function renderTitleLine(line, i, arr) {
  3277.     return (
  3278.       // show ... on 10th line if there are more lines
  3279.       i === 9 && arr.length > 10 ? '...' :
  3280.         i > 10 ? '' :
  3281.           // truncate to 100 chars
  3282.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3283.             // strip the leading space
  3284.             .replace(/^\s/, ''));
  3285.   }
  3286.  
  3287.   function maybeSetup(e) {
  3288.     if (!eventModifiers(e))
  3289.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3290.   }
  3291. }
  3292.  
  3293. function createConfigHtml() {
  3294.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3295.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3296.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3297.   return flattenHtml(`
  3298. <style>
  3299.   :host {
  3300.     all: initial !important;
  3301.     position: fixed !important;
  3302.     z-index: 2147483647 !important;
  3303.     top: 20px !important;
  3304.     right: 20px !important;
  3305.     padding: 1.5em !important;
  3306.     color: #000 !important;
  3307.     background: #eee !important;
  3308.     box-shadow: 5px 5px 25px 2px #000 !important;
  3309.     width: 33em !important;
  3310.     border: 1px solid black !important;
  3311.     display: flex !important;
  3312.     flex-direction: column !important;
  3313.   }
  3314.   main {
  3315.     font: 12px/15px sans-serif;
  3316.   }
  3317.   table {
  3318.     text-align:left;
  3319.   }
  3320.   ul {
  3321.     max-height: calc(100vh - 200px);
  3322.     margin: 0 0 15px 0;
  3323.     padding: 0;
  3324.     list-style: none;
  3325.   }
  3326.   li {
  3327.     margin: 0;
  3328.     padding: .25em 0;
  3329.   }
  3330.   li.options {
  3331.     display: flex;
  3332.     align-items: center;
  3333.     justify-content: space-between;
  3334.   }
  3335.   li.row {
  3336.     align-items: start;
  3337.     flex-wrap: wrap;
  3338.   }
  3339.   li.row label {
  3340.     display: flex;
  3341.     flex-direction: row;
  3342.     align-items: center;
  3343.   }
  3344.   li.row input {
  3345.     margin-right: .25em;
  3346.   }
  3347.   li.stretch label {
  3348.     flex: 1;
  3349.     white-space: nowrap;
  3350.   }
  3351.   li.stretch label > span {
  3352.     display: flex;
  3353.     flex-direction: row;
  3354.     flex: 1;
  3355.   }
  3356.   label {
  3357.     display: inline-flex;
  3358.     flex-direction: column;
  3359.   }
  3360.   label:not(:last-child) {
  3361.     margin-right: 1em;
  3362.   }
  3363.   input, select {
  3364.     min-height: 1.3em;
  3365.     box-sizing: border-box;
  3366.   }
  3367.   input[type=checkbox] {
  3368.     margin-left: 0;
  3369.   }
  3370.   input[type=number] {
  3371.     width: 4em;
  3372.   }
  3373.   input:not([type=checkbox])  {
  3374.     padding: 0 .25em;
  3375.   }
  3376.   input[type=range] {
  3377.     flex: 1;
  3378.     width: 100%;
  3379.     margin: 0 .25em;
  3380.     padding: 0;
  3381.     filter: saturate(0);
  3382.     opacity: .5;
  3383.   }
  3384.   u + input[type=range] {
  3385.     max-width: 3em;
  3386.   }
  3387.   input[type=range]:hover {
  3388.     filter: none;
  3389.     opacity: 1;
  3390.   }
  3391.   input[type=color] {
  3392.     position: absolute;
  3393.     width: calc(1.5em + 2px);
  3394.     opacity: 0;
  3395.     cursor: pointer;
  3396.   }
  3397.   u {
  3398.     position: relative;
  3399.     flex: 0 0 1.5em;
  3400.     height: 1.5em;
  3401.     border: 1px solid #888;
  3402.     pointer-events: none;
  3403.     color: #888;
  3404.     background-image:
  3405.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3406.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3407.     background-size: .5em .5em;
  3408.     background-position: 0 0, .25em .25em;
  3409.   }
  3410.   u::after {
  3411.     position: absolute;
  3412.     top: 0;
  3413.     left: 0;
  3414.     right: 0;
  3415.     bottom: 0;
  3416.     content: "";
  3417.     background-color: var(--color);
  3418.   }
  3419.   .range-edit {
  3420.     position: absolute;
  3421.     box-shadow: 0 0.25em 1em #000;
  3422.     z-index: 99;
  3423.   }
  3424.   textarea {
  3425.     resize: vertical;
  3426.     margin: 1px 0;
  3427.     font: 11px/1.25 Consolas, monospace;
  3428.   }
  3429.   :invalid {
  3430.     background-color: #f002;
  3431.     border-color: #800;
  3432.   }
  3433.   code {
  3434.     font-weight: bold;
  3435.   }
  3436.   a {
  3437.     text-decoration: none;
  3438.     color: LinkText;
  3439.   }
  3440.   a:hover {
  3441.     text-decoration: underline;
  3442.   }
  3443.   button {
  3444.     padding: .2em 1em;
  3445.     margin: 0 1em;
  3446.   }
  3447.   kbd {
  3448.     padding: 1px 6px;
  3449.     font-weight: bold;
  3450.     font-family: Consolas, monospace;
  3451.     border: 1px solid #888;
  3452.     border-radius: 3px;
  3453.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3454.   }
  3455.   .column {
  3456.     display: flex;
  3457.     flex-direction: column;
  3458.   }
  3459.   .highlight {
  3460.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3461.     animation-fill-mode: both;
  3462.   }
  3463.   #_rules > * {
  3464.     word-break: break-all;
  3465.   }
  3466.   #_rules > :not(:focus) {
  3467.     overflow: hidden; /* prevents wrapping in FF */
  3468.   }
  3469.   .invalid-domain {
  3470.     opacity: .5;
  3471.   }
  3472.   .matching-domain {
  3473.     border-color: #56b8ff;
  3474.     background: #d7eaff;
  3475.   }
  3476.   #_x {
  3477.     position: absolute;
  3478.     top: 0;
  3479.     right: 0;
  3480.     padding: 4px 8px;
  3481.     cursor: pointer;
  3482.     user-select: none;
  3483.   }
  3484.   #_x:hover {
  3485.     background-color: #8884;
  3486.   }
  3487.   #_cssApp {
  3488.     color: seagreen;
  3489.   }
  3490.   #_exportNotification {
  3491.     color: green;
  3492.     font-weight: bold;
  3493.     position: absolute;
  3494.     left: 0;
  3495.     right: 0;
  3496.     bottom: 2px;
  3497.   }
  3498.   #_installHint {
  3499.     color: green;
  3500.   }
  3501.   @keyframes fade-in {
  3502.     from { background-color: deepskyblue }
  3503.     to {}
  3504.   }
  3505.   @media (prefers-color-scheme: dark) {
  3506.     :host {
  3507.       color: #aaa !important;
  3508.       background: #333 !important;
  3509.     }
  3510.     a {
  3511.       color: deepskyblue;
  3512.     }
  3513.     button {
  3514.       background: linear-gradient(-5deg, #333, #555);
  3515.       border: 1px solid #000;
  3516.       box-shadow: 0 2px 6px #181818;
  3517.       border-radius: 3px;
  3518.       cursor: pointer;
  3519.     }
  3520.     button:hover {
  3521.       background: linear-gradient(-5deg, #333, #666);
  3522.     }
  3523.     textarea, input, select {
  3524.       background: #111;
  3525.       color: #BBB;
  3526.       border: 1px solid #555;
  3527.     }
  3528.     input[type=checkbox] {
  3529.       filter: invert(1);
  3530.     }
  3531.     input[type=range] {
  3532.       filter: invert(1) saturate(0);
  3533.     }
  3534.     input[type=range]:hover {
  3535.       filter: invert(1);
  3536.     }
  3537.     kbd {
  3538.       border-color: #666;
  3539.     }
  3540.     @supports (-moz-appearance: none) {
  3541.       input[type=checkbox],
  3542.       input[type=range],
  3543.       input[type=range]:hover {
  3544.         filter: none;
  3545.       }
  3546.     }
  3547.     .range-edit {
  3548.       box-shadow: 0 .5em 1em .5em #000;
  3549.     }
  3550.     .matching-domain {
  3551.       border-color: #0065af;
  3552.       background: #032b58;
  3553.       color: #ddd;
  3554.     }
  3555.     #_cssApp {
  3556.       color: darkseagreen;
  3557.     }
  3558.     #_installHint {
  3559.       color: greenyellow;
  3560.     }
  3561.     ::-webkit-scrollbar {
  3562.       width: 14px;
  3563.       height: 14px;
  3564.       background: #333;
  3565.     }
  3566.     ::-webkit-scrollbar-button:single-button {
  3567.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3568.     }
  3569.     ::-webkit-scrollbar-track-piece {
  3570.       background: #444;
  3571.       border: 4px solid #333;
  3572.       border-radius: 8px;
  3573.     }
  3574.     ::-webkit-scrollbar-thumb {
  3575.       border: 3px solid #333;
  3576.       border-radius: 8px;
  3577.       background: #666;
  3578.     }
  3579.     ::-webkit-resizer {
  3580.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3581.       border: 2px solid transparent;
  3582.     }
  3583.   }
  3584. </style>
  3585. <style id="_css">${cfg._getCss()}</style>
  3586. <main id="${PREFIX}setup">
  3587.   <div id=_x>x</div>
  3588.   <ul class=column>
  3589.     <details style="margin: -1em 0 0">
  3590.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3591.       <table>
  3592.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3593.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3594.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3595.         <tr><th>Force-activate<br>(for small pics)</th>
  3596.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3597.         <tr><td>&nbsp;</td></tr>
  3598.         <tr><th>Start zooming</th>
  3599.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3600.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3601.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3602.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3603.         <tr><th>Previous/next<br>in album</th>
  3604.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3605.         <tr><td>&nbsp;</td></tr>
  3606.       </table>
  3607.       <table>
  3608.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3609.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3610.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3611.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3612.       </table>
  3613.     </details>
  3614.     <li class="options stretch">
  3615.       <label>Popup shows on
  3616.         <select id=start>
  3617.           <option value=context>Right-click / &#8801; / Ctrl
  3618.           <option value=contextMK>Right-click / &#8801;
  3619.           <option value=contextM>Right-click
  3620.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3621.           <option value=ctrl>Ctrl
  3622.           <option value=auto>automatically
  3623.         </select>
  3624.       </label>
  3625.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3626.       <label title="(if the full version of the hovered image is ...% larger)">
  3627.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3628.       </label>
  3629.       <label>Zoom activates on
  3630.         <select id=zoom>
  3631.           <option value=context>Right click / Shift
  3632.           <option value=wheel>Wheel up / Shift
  3633.           <option value=shift>Shift
  3634.           <option value=auto>automatically
  3635.         </select>
  3636.       </label>
  3637.       <label>...and zooms to
  3638.         <select id=fit>
  3639.           <option value=all>fit to window
  3640.           <option value=large>fit if larger
  3641.           <option value=no>100%
  3642.           <option value="" title="Use custom scale factors">custom
  3643.         </select>
  3644.       </label>
  3645.     </li>
  3646.     <li class=options>
  3647.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3648.       </label>
  3649.       <label>When fully zoomed out:
  3650.         <select id=zoomOut>
  3651.           <option value=stay>stay in zoom mode
  3652.           <option value=auto>stay if still hovered
  3653.           <option value=unzoom>undo zoom mode
  3654.           <option value=close>close popup
  3655.         </select>
  3656.       </label>
  3657.       <label style="flex: 1" title="${trimLeft(`
  3658.         Scale factors to use when “zooms to” selector is set to “custom”.
  3659.         0 = fit to window,
  3660.         0! = same as 0 but also removes smaller values,
  3661.         * after a value marks the default zoom factor, for example: 1*
  3662.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3663.         ${scalesHint}
  3664.       `)}">Custom scale factors:
  3665.         <input id=scales placeholder="${scalesHint}">
  3666.       </label>
  3667.     </li>
  3668.     <li class="options row">
  3669.       <div>
  3670.         <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3671.           <input type=checkbox id=center>Centered*</label>
  3672.         <label title="Provides smoother experience but increases network traffic">
  3673.           <input type=checkbox id=preload>Preload on hover*</label>
  3674.         <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3675.       </div>
  3676.       <div>
  3677.         <label><input type=checkbox id=mute>Mute videos</label>
  3678.         <label title="Disable only if you spoof the HTTP headers yourself">
  3679.           <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3680.         <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3681.           <input type=checkbox id=globalStatus>Set status on &lt;html&gt;*</label>
  3682.       </div>
  3683.       <div>
  3684.         <label title="...or show a partial image while still loading">
  3685.           <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3686.         <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3687.         <label><input type=checkbox id=uiFadeinGallery>Fade-in transition in gallery</label>
  3688.       </div>
  3689.       <label><input type=checkbox id=startAltShown>
  3690.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3691.     </li>
  3692.     <li class="options stretch">
  3693.       <label>Background
  3694.         <span>
  3695.           <input id=uiBackgroundColor type=color><u></u>
  3696.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3697.         </span>
  3698.       </label>
  3699.       <label>Border color, opacity, size
  3700.         <span>
  3701.           <input id=uiBorderColor type=color><u></u>
  3702.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3703.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3704.         </span>
  3705.       </label>
  3706.       <label>Shadow color, opacity, size
  3707.         <span>
  3708.           <input id=uiShadowColor type=color><u></u>
  3709.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3710.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3711.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3712.         </span>
  3713.       </label>
  3714.       <label>Padding
  3715.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3716.       </label>
  3717.       <label>Margin
  3718.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3719.       </label>
  3720.     </li>
  3721.     <li>
  3722.       <a href="${MPIV_BASE_URL}Custom-CSS" target="_blank">Custom CSS:</a>&nbsp;
  3723.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3724.       <a tabindex=0 id=_reveal style="float: right"
  3725.          title="You can copy parts of it to override them in your custom CSS">
  3726.          View the built-in CSS</a>
  3727.       <div class=column>
  3728.         <textarea id=css spellcheck=false></textarea>
  3729.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3730.       </div>
  3731.     </li>
  3732.     <li style="display: flex; justify-content: space-between;">
  3733.       <div><a href="${MPIV_BASE_URL}Custom-host-rules" target="_blank">Custom host rules:</a></div>
  3734.       <div style="white-space: nowrap">
  3735.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3736.         in "d" value, for example <code>"d": "!foo.com"</code>
  3737.       </div>
  3738.       <div>
  3739.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3740.       </div>
  3741.     </li>
  3742.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3743.       <div id=_rules class=column>
  3744.         <textarea rows=1 spellcheck=false></textarea>
  3745.       </div>
  3746.     </li>
  3747.     <li>
  3748.       <div hidden id=_installLoading>Loading...</div>
  3749.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3750.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3751.       <a href="${MPIV_BASE_URL}Rules" id=_install target="_blank">Install rule from repository...</a>
  3752.     </li>
  3753.   </ul>
  3754.   <div style="text-align:center">
  3755.     <button id=_ok accesskey=s>OK</button>
  3756.     <button id=_apply accesskey=a>Apply</button>
  3757.     <button id=_import style="margin-right: 0">Import</button>
  3758.     <button id=_export style="margin-left: 0">Export</button>
  3759.     <button id=_cancel>Cancel</button>
  3760.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3761.   </div>
  3762. </main>`);
  3763. }
  3764.  
  3765. function createGlobalStyle() {
  3766.   App.globalStyle = /*language=CSS*/ (String.raw`
  3767. #\mpiv-bar {
  3768.   position: fixed;
  3769.   z-index: 2147483647;
  3770.   top: 0;
  3771.   left: 0;
  3772.   right: 0;
  3773.   opacity: 0;
  3774.   transition: opacity 1s ease .25s;
  3775.   text-align: center;
  3776.   font-family: sans-serif;
  3777.   font-size: 15px;
  3778.   font-weight: bold;
  3779.   background: #0005;
  3780.   color: white;
  3781.   padding: 4px 10px;
  3782.   text-shadow: .5px .5px 2px #000;
  3783. }
  3784. #\mpiv-bar.\mpiv-show,
  3785. #\mpiv-bar[data-force] {
  3786.   opacity: 1;
  3787. }
  3788. #\mpiv-bar[data-zoom]::after {
  3789.   content: " (" attr(data-zoom) ")";
  3790.   opacity: .8;
  3791. }
  3792. #\mpiv-popup.\mpiv-show {
  3793.   display: inline;
  3794. }
  3795. #\mpiv-popup {
  3796.   display: none;
  3797.   cursor: none;
  3798. ${cfg.uiFadein ? String.raw`
  3799.   animation: .2s \mpiv-fadein both;
  3800.   transition: box-shadow .25s, background-color .25s;
  3801.   ` : ''}
  3802. ${App.popupStyleBase = `
  3803.   border: none;
  3804.   box-sizing: border-box;
  3805.   background-size: cover;
  3806.   position: fixed;
  3807.   z-index: 2147483647;
  3808.   padding: 0;
  3809.   margin: 0;
  3810.   top: 0;
  3811.   left: 0;
  3812.   width: auto;
  3813.   height: auto;
  3814.   transform-origin: center;
  3815.   max-width: none;
  3816.   max-height: none;
  3817. `}
  3818. }
  3819. #\mpiv-popup.\mpiv-show {
  3820.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3821.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3822.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3823.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3824. }
  3825. #\mpiv-popup.\mpiv-show[loaded] {
  3826.   background-color: ${Util.color('Background')};
  3827.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3828. }
  3829. #\mpiv-popup[data-gallery-flip] {
  3830.   animation: none;
  3831.   transition: none;
  3832. }
  3833. #\mpiv-popup[data-no-aa],
  3834. #\mpiv-popup.\mpiv-zoom-max {
  3835.   image-rendering: pixelated;
  3836. }
  3837. #\mpiv-setup {
  3838. }
  3839. @keyframes \mpiv-fadein {
  3840.   from {
  3841.     opacity: 0;
  3842.     border-color: transparent;
  3843.   }
  3844.   to {
  3845.     opacity: 1;
  3846.   }
  3847. }
  3848. ` + (cfg.globalStatus ? String.raw`
  3849. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3850.   cursor: progress !important;
  3851. }
  3852. :root.\mpiv-edge #\mpiv-popup {
  3853.   cursor: default;
  3854. }
  3855. :root.\mpiv-error *:hover {
  3856.   cursor: not-allowed !important;
  3857. }
  3858. :root.\mpiv-ready *:hover,
  3859. :root.\mpiv-large *:hover {
  3860.   cursor: zoom-in !important;
  3861. }
  3862. :root.\mpiv-shift *:hover {
  3863.   cursor: default !important;
  3864. }
  3865. ` : String.raw`
  3866. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3867.   cursor: progress;
  3868. }
  3869. [\mpiv-status~="edge"]:hover {
  3870.   cursor: default;
  3871. }
  3872. [\mpiv-status~="error"]:hover {
  3873.   cursor: not-allowed;
  3874. }
  3875. [\mpiv-status~="ready"]:hover,
  3876. [\mpiv-status~="large"]:hover {
  3877.   cursor: zoom-in;
  3878. }
  3879. [\mpiv-status~="shift"]:hover {
  3880.   cursor: default;
  3881. }
  3882. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3883.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3884.   return App.globalStyle;
  3885. }
  3886.  
  3887. //#region Global utilities
  3888.  
  3889. const clamp = (v, min, max) =>
  3890.   v < min ? min : v > max ? max : v;
  3891.  
  3892. const compareNumbers = (a, b) =>
  3893.   a - b;
  3894.  
  3895. const flattenHtml = str =>
  3896.   str.trim().replace(/\n\s*/g, '');
  3897.  
  3898. const dropEvent = e =>
  3899.   (e.preventDefault(), e.stopPropagation());
  3900.  
  3901. const ensureArray = v =>
  3902.   Array.isArray(v) ? v : [v];
  3903.  
  3904. /** @param {KeyboardEvent} e */
  3905. const eventModifiers = e =>
  3906.   (e.altKey ? '!' : '') +
  3907.   (e.ctrlKey ? '^' : '') +
  3908.   (e.metaKey ? '#' : '') +
  3909.   (e.shiftKey ? '+' : '');
  3910.  
  3911. const isFunction = val => typeof val === 'function';
  3912.  
  3913. const now = performance.now.bind(performance);
  3914.  
  3915. const sumProps = (...props) => {
  3916.   let sum = 0;
  3917.   for (const p of props)
  3918.     sum += parseFloat(p) || 0;
  3919.   return sum;
  3920. };
  3921.  
  3922. const tryCatch = function (fn, ...args) {
  3923.   try {
  3924.     return fn.apply(this, args);
  3925.   } catch (e) {}
  3926. };
  3927.  
  3928. const tryJSON = str =>
  3929.   tryCatch(JSON.parse, str);
  3930.  
  3931. const pick = (obj, path, fn) => (
  3932.   obj = path.split(/[[.]/).reduce((res, k) => res && res[k.endsWith(']') ? k.slice(0, -1) : k], obj)
  3933. ) && (fn ? fn(obj) : obj);
  3934.  
  3935. const $ = (sel, node = doc) =>
  3936.   node.querySelector(sel) || false;
  3937.  
  3938. const $$ = (sel, node = doc) =>
  3939.   node.querySelectorAll(sel);
  3940.  
  3941. const $create = (tag, props) =>
  3942.   Object.assign(doc.createElement(tag), props);
  3943.  
  3944. const $css = (el, props) =>
  3945.   Object.entries(props).forEach(([k, v]) =>
  3946.     el.style.setProperty(k, v, 'important'));
  3947.  
  3948. const $parseHtml = str =>
  3949.   new DOMParser().parseFromString(str, 'text/html');
  3950.  
  3951. const $many = (q, doc) => {
  3952.   for (const selector of ensureArray(q)) {
  3953.     const el = selector && $(selector, doc);
  3954.     if (el)
  3955.       return el;
  3956.   }
  3957. };
  3958.  
  3959. const $prop = (sel, prop, node = doc) =>
  3960.   (node = $(sel, node)) && node[prop] || '';
  3961.  
  3962. const $propUp = (node, prop) =>
  3963.   (node = node.closest(`[${prop}]`)) &&
  3964.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3965.   '';
  3966.  
  3967. const $remove = node =>
  3968.   node && node.remove();
  3969.  
  3970. //#endregion
  3971. //#region Init
  3972.  
  3973. nonce = ($('script[nonce]') || {}).nonce || '';
  3974.  
  3975. Config.load({save: true}).then(res => {
  3976.   cfg = res;
  3977.   if (Menu) Menu.register();
  3978.  
  3979.   if (doc.body) App.checkImageTab();
  3980.   else addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3981.  
  3982.   addEventListener('mouseover', Events.onMouseOver, true);
  3983.   addEventListener('contextmenu', Events.onContext, true);
  3984.   addEventListener('keydown', Events.onKeyDown, true);
  3985.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3986.     addEventListener('click', setupClickedRule, true);
  3987.   addEventListener('message', App.onMessage, true);
  3988. });
  3989.  
  3990. //#endregion