☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-12-31 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     1.2.18
  27. // @author      tophf
  28. //
  29. // @original-version 2017.9.29
  30. // @original-author  kuehlschrank
  31. //
  32. // @connect     *
  33. // CSP check:
  34. // @connect     self
  35. // rule installer in config dialog:
  36. // @connect     github.com
  37. // big/trusted hostings for the built-in rules with "q":
  38. // @connect     deviantart.com
  39. // @connect     facebook.com
  40. // @connect     fbcdn.com
  41. // @connect     flickr.com
  42. // @connect     gfycat.com
  43. // @connect     googleusercontent.com
  44. // @connect     gyazo.com
  45. // @connect     imgur.com
  46. // @connect     instagr.am
  47. // @connect     instagram.com
  48. // @connect     prnt.sc
  49. // @connect     prntscr.com
  50. // @connect     user-images.githubusercontent.com
  51. //
  52. // @supportURL  https://github.com/tophf/mpiv/issues
  53. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  54. // ==/UserScript==
  55.  
  56. 'use strict';
  57.  
  58. //#region Globals
  59.  
  60. /** @type mpiv.Config */
  61. let cfg;
  62. /** @type mpiv.AppInfo */
  63. let ai = {rule: {}};
  64. /** @type Element */
  65. let elConfig;
  66. let nonce;
  67.  
  68. const doc = document;
  69. const hostname = location.hostname;
  70. const dotDomain = '.' + hostname;
  71. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  72. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75.  
  76. const PREFIX = 'mpiv-';
  77. const STATUS_ATTR = `${PREFIX}status`;
  78. const MSG = Object.assign({}, ...[
  79.   'getViewSize',
  80.   'viewSize',
  81. ].map(k => ({[k]: `${PREFIX}${k}`})));
  82. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  83. // time for volatile things to settle down meanwhile we postpone action
  84. // examples: loading image from cache, quickly moving mouse over one element to another
  85. const SETTLE_TIME = 50;
  86. // used to detect JS code in host rules
  87. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  88. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  89. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  90. const ZOOM_MAX = 16;
  91. const SYM_U = Symbol('u');
  92. const TRUSTED = (({trustedTypes}, policy) =>
  93.   trustedTypes ? trustedTypes.createPolicy('mpiv', policy) : policy
  94. )(window, {
  95.   createHTML: str => str,
  96.   createScript: str => str,
  97. });
  98. const FN_ARGS = {
  99.   s: ['m', 'node', 'rule'],
  100.   c: ['text', 'doc', 'node', 'rule'],
  101.   q: ['text', 'doc', 'node', 'rule'],
  102.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  103. };
  104. //#endregion
  105. //#region GM4 polyfill
  106.  
  107. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  108.   this.GM = {info: GM_info};
  109. if (!GM.getValue)
  110.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  111. if (!GM.setValue)
  112.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  113. if (!GM.openInTab)
  114.   GM.openInTab = GM_openInTab;
  115. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  116.   GM.registerMenuCommand = GM_registerMenuCommand;
  117. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  118.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  119. if (!GM.setClipboard)
  120.   GM.setClipboard = GM_setClipboard;
  121. if (!GM.xmlHttpRequest)
  122.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  123.  
  124. //#endregion
  125.  
  126. const App = {
  127.  
  128.   isEnabled: true,
  129.   isImageTab: false,
  130.   globalStyle: '',
  131.   popupStyleBase: '',
  132.  
  133.   activate(info, event) {
  134.     const {match, node, rule, url} = info;
  135.     if (elConfig) console.info({node, rule, url, match});
  136.     if (ai.node) App.deactivate();
  137.     ai = info;
  138.     ai.force = event.ctrlKey;
  139.     ai.gNum = 0;
  140.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  141.     Util.suppressTooltip();
  142.     Calc.updateViewSize();
  143.     Events.toggle(true);
  144.     Events.trackMouse(event);
  145.     if (ai.force) {
  146.       App.start();
  147.     } else if (cfg.start === 'auto' && !rule.manual) {
  148.       App.belate();
  149.     } else {
  150.       Status.set('ready');
  151.     }
  152.   },
  153.  
  154.   belate() {
  155.     if (cfg.preload) {
  156.       ai.preloadStart = now();
  157.       App.start();
  158.       Status.set('+preloading');
  159.       setTimeout(Status.set, cfg.delay, '-preloading');
  160.     } else {
  161.       ai.timer = setTimeout(App.start, cfg.delay);
  162.     }
  163.   },
  164.  
  165.   checkImageTab() {
  166.     const el = doc.body.firstElementChild;
  167.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  168.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  169.   },
  170.  
  171.   checkProgress({start} = {}) {
  172.     const p = ai.popup;
  173.     if (!p)
  174.       return;
  175.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  176.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  177.     if (h)
  178.       return App.canCommit(w, h);
  179.     if (start) {
  180.       clearInterval(ai.timerProgress);
  181.       ai.timerProgress = setInterval(App.checkProgress, 150);
  182.     }
  183.   },
  184.  
  185.   canCommit(w, h) {
  186.     if (!ai.force && ai.rect && !ai.gItems &&
  187.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  188.       App.deactivate();
  189.       return false;
  190.     }
  191.     App.stopTimers();
  192.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  193.     if (wait > 0) {
  194.       ai.timer = setTimeout(App.checkProgress, wait);
  195.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  196.       App.handleError({type: 'error'});
  197.     } else {
  198.       App.commit();
  199.     }
  200.     return true;
  201.   },
  202.  
  203.   async commit() {
  204.     const p = ai.popup;
  205.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  206.     if (isDecoded) {
  207.       await p.decode();
  208.       if (p !== ai.popup)
  209.         return;
  210.     }
  211.     App.updateStyles();
  212.     Calc.measurePopup();
  213.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  214.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  215.     if (willMove)
  216.       Popup.move();
  217.     Bar.updateName();
  218.     Bar.updateDetails();
  219.     Status.set(!ai.popupLoaded && 'loading');
  220.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  221.                ai.nheight > p.clientHeight + ai.extras.h;
  222.     if (ai.large) {
  223.       Status.set('+large');
  224.       // prevent a blank bg+border in FF
  225.       if (isFF && p.complete && !isDecoded)
  226.         p.style.backgroundImage = `url('${p.src}')`;
  227.     }
  228.   },
  229.  
  230.   deactivate({wait} = {}) {
  231.     App.stopTimers();
  232.     if (ai.req)
  233.       tryCatch.call(ai.req, ai.req.abort);
  234.     if (ai.tooltip)
  235.       ai.tooltip.node.title = ai.tooltip.text;
  236.     Status.set(false);
  237.     Bar.set(false);
  238.     Events.toggle(false);
  239.     Popup.destroy();
  240.     if (wait) {
  241.       App.isEnabled = false;
  242.       setTimeout(App.enable, 200);
  243.     }
  244.     ai = {rule: {}};
  245.   },
  246.  
  247.   enable() {
  248.     App.isEnabled = true;
  249.   },
  250.  
  251.   handleError(e, rule = ai.rule) {
  252.     if (rule && rule.onerror === 'skip')
  253.       return;
  254.     const fe = Util.formatError(e, rule);
  255.     if (!rule || !ai.urls || !ai.urls.length)
  256.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  257.     if (ai.urls && ai.urls.length) {
  258.       ai.url = ai.urls.shift();
  259.       if (ai.url) {
  260.         App.stopTimers();
  261.         App.startSingle();
  262.       } else {
  263.         App.deactivate();
  264.       }
  265.     } else if (ai.node) {
  266.       Status.set('error');
  267.       Bar.set(fe.message, 'error');
  268.     }
  269.   },
  270.  
  271.   /** @param {MessageEvent} e */
  272.   onMessage(e) {
  273.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  274.       e.stopImmediatePropagation();
  275.       for (const el of doc.getElementsByTagName('iframe')) {
  276.         if (el.contentWindow === e.source) {
  277.           const s = Calc.frameSize(el, window).join(':');
  278.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  279.           return;
  280.         }
  281.       }
  282.     }
  283.   },
  284.  
  285.   /** @param {MessageEvent} e */
  286.   onMessageChild(e) {
  287.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  288.       e.stopImmediatePropagation();
  289.       removeEventListener('message', App.onMessageChild, true);
  290.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  291.       if (w && h) ai.view = {w, h, x, y};
  292.     }
  293.   },
  294.  
  295.   start() {
  296.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  297.     if (!Util.isHovered(ai.node)) {
  298.       App.deactivate();
  299.       return;
  300.     }
  301.     App.updateStyles();
  302.     if (ai.gallery)
  303.       App.startGallery();
  304.     else
  305.       App.startSingle();
  306.   },
  307.  
  308.   startSingle() {
  309.     Status.loading();
  310.     ai.imageUrl = null;
  311.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  312.       Remoting.findRedirect();
  313.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  314.       App.startFromQ();
  315.     } else {
  316.       Popup.create(ai.url);
  317.       Ruler.runC();
  318.     }
  319.   },
  320.  
  321.   async startFromQ() {
  322.     try {
  323.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  324.       const url = Ruler.runQ(responseText, doc, finalUrl);
  325.       if (!url)
  326.         throw 'The "q" rule did not produce any URL.';
  327.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  328.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  329.         if (!info || !info.url)
  330.           throw `Couldn't follow URL: ${url}`;
  331.         Object.assign(ai, info);
  332.         App.startSingle();
  333.       } else {
  334.         Popup.create(url, finalUrl);
  335.         Ruler.runC(responseText, doc);
  336.       }
  337.     } catch (e) {
  338.       App.handleError(e);
  339.     }
  340.   },
  341.  
  342.   async startGallery() {
  343.     Status.loading();
  344.     try {
  345.       const startUrl = ai.url;
  346.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  347.       const items = await new Promise(resolve => {
  348.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  349.           resolve);
  350.         if (Array.isArray(it))
  351.           resolve(it);
  352.       });
  353.       // bail out if the gallery's async callback took too long
  354.       if (ai.url !== startUrl) return;
  355.       ai.gNum = items.length;
  356.       ai.gItems = items.length && items;
  357.       if (ai.gItems) {
  358.         const i = items.index;
  359.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  360.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  361.             Gallery.findIndex(ai.url);
  362.         setTimeout(Gallery.next);
  363.       } else {
  364.         throw 'Empty gallery';
  365.       }
  366.     } catch (e) {
  367.       App.handleError(e);
  368.     }
  369.   },
  370.  
  371.   stopTimers() {
  372.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  373.       clearTimeout(ai[timer]);
  374.     clearInterval(ai.timerProgress);
  375.   },
  376.  
  377.   toggleZoom({keepScale} = {}) {
  378.     const p = ai.popup;
  379.     if (!p || !ai.scales || ai.scales.length < 2)
  380.       return;
  381.     ai.zoomed = !ai.zoomed;
  382.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  383.     if (ai.zooming)
  384.       p.classList.add(`${PREFIX}zooming`);
  385.     Popup.move();
  386.     Bar.updateDetails();
  387.     Status.set(ai.zoomed ? 'zoom' : false);
  388.     return ai.zoomed;
  389.   },
  390.  
  391.   updateStyles() {
  392.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  393.     Util.addStyle('rule', ai.rule.css || '');
  394.   },
  395. };
  396.  
  397. const Bar = {
  398.  
  399.   set(label, className) {
  400.     let b = ai.bar;
  401.     if (typeof label !== 'string') {
  402.       $remove(b);
  403.       ai.bar = null;
  404.       return;
  405.     }
  406.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  407.     App.updateStyles();
  408.     Bar.updateDetails();
  409.     Bar.show();
  410.     b.textContent = '';
  411.     b.innerHTML = TRUSTED.createHTML(label);
  412.     if (!b.parentNode) {
  413.       doc.body.appendChild(b);
  414.       Util.forceLayout(b);
  415.     }
  416.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  417.   },
  418.  
  419.   show(isForced) {
  420.     clearTimeout(ai.timerBar);
  421.     ai.bar.style.removeProperty('opacity');
  422.     if (isForced)
  423.       ai.bar.dataset.force = '';
  424.     else
  425.       ai.timerBar = setTimeout(Bar.hide, 3000);
  426.   },
  427.  
  428.   hide(isForced) {
  429.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  430.       $css(ai.bar, {opacity: 0});
  431.       delete ai.bar.dataset.force;
  432.     }
  433.   },
  434.  
  435.   updateName() {
  436.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  437.     if (gi) {
  438.       const item = gi[i];
  439.       const noDesc = !gi.some(_ => _.desc);
  440.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  441.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  442.         item.desc,
  443.       ].filter(Boolean).join(' - ')}`;
  444.       Bar.set(c.trim() || ' ', 'gallery', true);
  445.     } else if ('caption' in ai) {
  446.       Bar.set(ai.caption, 'caption');
  447.     } else if (ai.tooltip) {
  448.       Bar.set(ai.tooltip.text, 'tooltip');
  449.     } else {
  450.       Bar.set(' ', 'info');
  451.     }
  452.   },
  453.  
  454.   updateDetails() {
  455.     if (!ai.bar) return;
  456.     const r = ai.rotate;
  457.     const zoom = ai.nwidth && `${
  458.       Math.round(ai.scale * 100)
  459.     }%${
  460.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  461.     }${
  462.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  463.     }, ${
  464.       ai.nwidth
  465.     } x ${
  466.       ai.nheight
  467.     } px, ${
  468.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  469.     } MP, ${
  470.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  471.     }`.replace(/\x20/g, '\xA0');
  472.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  473.       if (zoom) ai.bar.dataset.zoom = zoom;
  474.       else delete ai.bar.dataset.zoom;
  475.       Bar.show();
  476.     }
  477.   },
  478. };
  479.  
  480. const Calc = {
  481.  
  482.   aspectRatio(w, h) {
  483.     for (let rat = w / h, a, b = 0; ;) {
  484.       b++;
  485.       a = Math.round(w * b / h);
  486.       if (a > 10 && b > 10 || a > 100 || b > 100)
  487.         return rat.toFixed(2);
  488.       if (Math.abs(a / b - rat) < .01)
  489.         return `${a}:${b}`;
  490.     }
  491.   },
  492.  
  493.   frameSize(elFrame, wnd) {
  494.     if (!elFrame) return;
  495.     const r = elFrame.getBoundingClientRect();
  496.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  497.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  498.     const x = r.left < 0 ? -r.left : 0;
  499.     const y = r.top < 0 ? -r.top : 0;
  500.     return [w, h, x, y];
  501.   },
  502.  
  503.   generateScales(fit) {
  504.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  505.     const zoomStep = cfg.zoomStep / 100;
  506.     const arr = [scale];
  507.     if (fit !== 1) {
  508.       const diff = goal / scale;
  509.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  510.       const step = steps && Math.pow(diff, 1 / steps);
  511.       for (let i = steps; --i > 0;)
  512.         arr.push((scale *= step));
  513.       arr.push(scale = goal);
  514.     }
  515.     while ((scale *= zoomStep) <= ZOOM_MAX)
  516.       arr.push(scale);
  517.     return arr;
  518.   },
  519.  
  520.   measurePopup() {
  521.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  522.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  523.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  524.     if (p.clientWidth > nw) {
  525.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  526.       nh = ai.nheight = w / nw * nh | 0;
  527.       nw = ai.nwidth = w;
  528.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  529.     }
  530.     p.className = `${PREFIX}show`;
  531.     p.removeAttribute('style');
  532.     const s = getComputedStyle(p);
  533.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  534.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  535.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  536.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  537.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  538.     ai.extras = {
  539.       inw, inh,
  540.       outw, outh,
  541.       o: o2 / 2,
  542.       w: inw + outw,
  543.       h: inh + outh,
  544.     };
  545.     const fit = Math.min(
  546.       (ai.view.w - ai.extras.w) / ai.nwidth,
  547.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  548.     const isCustom = !cfg.fit && cfg.scales.length;
  549.     let cutoff = Math.min(1, fit);
  550.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  551.     if (isCustom) {
  552.       const dst = [];
  553.       for (const scale of cfg.scales) {
  554.         const val = parseFloat(scale) || fit;
  555.         dst.push(val);
  556.         if (isCustom && typeof scale === 'string') {
  557.           if (scale.includes('!')) cutoff = val;
  558.           if (scale.includes('*')) scaleZoom = val;
  559.         }
  560.       }
  561.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  562.     } else {
  563.       ai.scales = Calc.generateScales(fit);
  564.     }
  565.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  566.     ai.scaleFit = fit;
  567.     ai.scaleZoom = scaleZoom;
  568.   },
  569.  
  570.   rect() {
  571.     let {node, rule} = ai;
  572.     let n = rule.rect && node.closest(rule.rect);
  573.     if (n) return n.getBoundingClientRect();
  574.     const nested = node.getElementsByTagName('*');
  575.     let maxArea = 0;
  576.     let maxBounds;
  577.     n = node;
  578.     for (let i = 0; n; n = nested[i++]) {
  579.       const bounds = n.getBoundingClientRect();
  580.       const area = bounds.width * bounds.height;
  581.       if (area > maxArea) {
  582.         maxArea = area;
  583.         maxBounds = bounds;
  584.         node = n;
  585.       }
  586.     }
  587.     return maxBounds;
  588.   },
  589.  
  590.   scaleBiggerThan(scale, i, arr) {
  591.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  592.   },
  593.  
  594.   scaleIndex(dir) {
  595.     const i = ai.scales.indexOf(ai.scale);
  596.     if (i >= 0) return i + dir;
  597.     for (
  598.       let len = ai.scales.length,
  599.         i = dir > 0 ? 0 : len - 1;
  600.       i >= 0 && i < len;
  601.       i += dir
  602.     ) {
  603.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  604.         return i;
  605.     }
  606.     return -1;
  607.   },
  608.  
  609.   scaleForFirstZoom(keepScale) {
  610.     const z = ai.scaleZoom;
  611.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  612.   },
  613.  
  614.   updateViewSize() {
  615.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  616.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  617.     if (window === top) return;
  618.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  619.     if (w && h) {
  620.       ai.view = {w, h, x: 0, y: 0};
  621.     } else {
  622.       addEventListener('message', App.onMessageChild, true);
  623.       parent.postMessage(MSG.getViewSize, '*');
  624.     }
  625.   },
  626. };
  627.  
  628. class Config {
  629.  
  630.   constructor({data: c, save}) {
  631.     if (typeof c === 'string')
  632.       c = tryCatch(JSON.parse, c);
  633.     if (typeof c !== 'object' || !c)
  634.       c = {};
  635.     const {DEFAULTS} = Config;
  636.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  637.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  638.         '';
  639.     if (c.version !== DEFAULTS.version) {
  640.       if (typeof c.hosts === 'string')
  641.         c.hosts = c.hosts.split('\n')
  642.           .map(s => tryCatch(JSON.parse, s) || s)
  643.           .filter(Boolean);
  644.       if (c.close === true || c.close === false)
  645.         c.zoomOut = c.close ? 'auto' : 'stay';
  646.       for (const key in DEFAULTS)
  647.         if (typeof c[key] !== typeof DEFAULTS[key])
  648.           c[key] = DEFAULTS[key];
  649.       if (c.version === 3 && c.scales[0] === 0)
  650.         c.scales[0] = '0!';
  651.       for (const key in c)
  652.         if (!(key in DEFAULTS))
  653.           delete c[key];
  654.       c.version = DEFAULTS.version;
  655.       if (save)
  656.         GM.setValue('cfg', c);
  657.     }
  658.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  659.       App.globalStyle = '';
  660.     if (!Array.isArray(c.scales))
  661.       c.scales = [];
  662.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  663.     Object.assign(this, DEFAULTS, c);
  664.   }
  665.  
  666.   static async load(opts) {
  667.     opts.data = await GM.getValue('cfg');
  668.     return new Config(opts);
  669.   }
  670.  
  671.   _getCss() {
  672.     const {css} = this;
  673.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  674.   }
  675. }
  676.  
  677. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  678.   center: false,
  679.   css: '',
  680.   delay: 500,
  681.   fit: '',
  682.   globalStatus: false,
  683.   // prefer ' inside rules because " will be displayed as \"
  684.   // example: "img[src*='icon']"
  685.   hosts: [{
  686.     name: 'No popup for YouTube thumbnails',
  687.     d: 'www.youtube.com',
  688.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  689.     s: '',
  690.   }, {
  691.     name: 'No popup for SVG/PNG icons',
  692.     d: '',
  693.     e: "img[src*='icon']",
  694.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  695.     s: '',
  696.   }],
  697.   imgtab: false,
  698.   mute: false,
  699.   preload: false,
  700.   scale: 1.25,
  701.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  702.   start: 'auto',
  703.   startAlt: 'context',
  704.   startAltShown: false,
  705.   uiBackgroundColor: '#ffffff',
  706.   uiBackgroundOpacity: 100,
  707.   uiBorderColor: '#000000',
  708.   uiBorderOpacity: 100,
  709.   uiBorder: 0,
  710.   uiFadein: true,
  711.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  712.   uiShadowColor: '#000000',
  713.   uiShadowOpacity: 80,
  714.   uiShadow: 20,
  715.   uiPadding: 0,
  716.   uiMargin: 0,
  717.   version: 6,
  718.   waitLoad: false,
  719.   xhr: true,
  720.   zoom: 'context',
  721.   zoomOut: 'auto',
  722.   zoomStep: 133,
  723. });
  724.  
  725. const CspSniffer = {
  726.  
  727.   /** @type {?Object<string,string[]>} */
  728.   csp: null,
  729.   selfUrl: location.origin + '/',
  730.  
  731.   // will be null when done
  732.   init() {
  733.     this.init = location.protocol === 'https:' && new Promise(resolve => {
  734.       const done = () => {
  735.         this.init = null;
  736.         resolve();
  737.       };
  738.       const xhr = GM.xmlHttpRequest({
  739.         url: location.href,
  740.         method: 'GET',
  741.         timeout: Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2),
  742.         onprogress: ({responseHeaders: rh}) => {
  743.           if (rh && this.init) {
  744.             this.csp = this._parse(rh.match(/^\s*Content-Security-Policy:\s*(.+)/mi));
  745.             if (xhr) xhr.abort();
  746.             done();
  747.           }
  748.         },
  749.         onerror: done,
  750.       });
  751.     });
  752.   },
  753.  
  754.   async check(url) {
  755.     if (this.init) await this.init;
  756.     const isVideo = Util.isVideoUrl(url);
  757.     let mode;
  758.     if (this.csp) {
  759.       const src = this.csp[isVideo ? 'media' : 'img'];
  760.       if (!src.some(this._srcMatches, url))
  761.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  762.     }
  763.     return [mode || ai.xhr, isVideo];
  764.   },
  765.  
  766.   _parse(csp) {
  767.     if (!csp) return;
  768.     const src = {};
  769.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  770.     for (let m; (m = rx.exec(csp));)
  771.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  772.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  773.       nonce = RegExp.$1;
  774.     if ((src.trusted || []).includes("'script'"))
  775.       App.NOP = () => {};
  776.     if (!src.img) src.img = src.default || [];
  777.     if (!src.media) src.media = src.default || [];
  778.     for (const set of [src.img, src.media]) {
  779.       set.forEach((item, i) => {
  780.         if (item !== '*' && item.includes('*')) {
  781.           set[i] = new RegExp(
  782.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  783.             item
  784.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  785.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  786.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  787.             .replace(/[^/]$/, '$&/'));
  788.         }
  789.       });
  790.     }
  791.     return src;
  792.   },
  793.  
  794.   /** @this string */
  795.   _srcMatches(src) {
  796.     return src instanceof RegExp ? src.test(this) :
  797.       src === '*' ||
  798.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  799.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  800.   },
  801. };
  802.  
  803. const Events = {
  804.  
  805.   hoverData: null,
  806.   hoverTimer: 0,
  807.   ignoreKeyHeld: false,
  808.  
  809.   onMouseOver(e) {
  810.     let node = e.target;
  811.     Events.ignoreKeyHeld = e.shiftKey;
  812.     if (!App.isEnabled ||
  813.         e.shiftKey ||
  814.         ai.zoomed ||
  815.         node === ai.popup ||
  816.         node === doc.body ||
  817.         node === doc.documentElement ||
  818.         node === elConfig ||
  819.         ai.gallery && ai.rectHovered)
  820.       return;
  821.     if (node.shadowRoot)
  822.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  823.     // we don't want to process everything in the path of a quickly moving mouse cursor
  824.     Events.hoverData = {e, node, start: now()};
  825.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  826.   },
  827.  
  828.   onMouseOverThrottled(force) {
  829.     if (!Events.hoverData)
  830.       return;
  831.     const {start, e, node} = Events.hoverData;
  832.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  833.     const wait = force ? 0 : start + SETTLE_TIME - now();
  834.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  835.     if (Events.hoverTimer || !Util.isHovered(node))
  836.       return;
  837.     Events.hoverData = null;
  838.     if (!Ruler.rules)
  839.       Ruler.init();
  840.     const info = RuleMatcher.adaptiveFind(node);
  841.     if (info && info.url && info.node !== ai.node)
  842.       App.activate(info, e);
  843.   },
  844.  
  845.   onMouseOut(e) {
  846.     if (!e.relatedTarget && !e.shiftKey)
  847.       App.deactivate();
  848.   },
  849.  
  850.   onMouseOutShadow(e) {
  851.     const root = e.target.shadowRoot;
  852.     if (root) {
  853.       root.removeEventListener('mouseover', Events.onMouseOver);
  854.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  855.     }
  856.   },
  857.  
  858.   onMouseMove(e) {
  859.     Events.trackMouse(e);
  860.     if (e.shiftKey)
  861.       return;
  862.     if (!ai.zoomed && !ai.rectHovered) {
  863.       App.deactivate();
  864.     } else if (ai.zoomed) {
  865.       Popup.move();
  866.       const {cx, cy, view: {w, h}} = ai;
  867.       const bx = w / 6;
  868.       const by = h / 6;
  869.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  870.       Status.set(`${onEdge ? '+' : '-'}edge`);
  871.     }
  872.   },
  873.  
  874.   onMouseDown({shiftKey, button}) {
  875.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  876.       ai.controlled = ai.zoomed = true;
  877.     } else if (button === 2 || shiftKey) {
  878.       // Shift = ignore; RMB will be processed in onContext
  879.     } else {
  880.       App.deactivate({wait: true});
  881.       doc.addEventListener('mouseup', App.enable, {once: true});
  882.     }
  883.   },
  884.  
  885.   onMouseScroll(e) {
  886.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  887.     if (ai.zoomed) {
  888.       Events.zoomInOut(dir);
  889.     } else if (ai.gNum > 1 && ai.popup) {
  890.       Gallery.next(-dir);
  891.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  892.       App.toggleZoom();
  893.     } else {
  894.       App.deactivate();
  895.       return;
  896.     }
  897.     dropEvent(e);
  898.   },
  899.  
  900.   onKeyDown(e) {
  901.     // Synthesized events may be of the wrong type and not have a `key`
  902.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  903.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  904.     if (!p &&
  905.         !Events.ignoreKeyHeld &&
  906.         key === '^Control' &&
  907.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  908.       dropEvent(e);
  909.       if (Events.hoverData) {
  910.         Events.hoverData.e = e;
  911.         Events.onMouseOverThrottled(true);
  912.       }
  913.       if (ai.node) {
  914.         ai.force = true;
  915.         App.start();
  916.       }
  917.     }
  918.     if (!p || e.repeat)
  919.       return;
  920.     switch (key) {
  921.       case '+Shift':
  922.         if (ai.shiftKeyTime)
  923.           return;
  924.         ai.shiftKeyTime = now();
  925.         Status.set('+shift');
  926.         Bar.show(true);
  927.         if (p.tagName === 'VIDEO')
  928.           p.controls = true;
  929.         return;
  930.       case 'KeyA':
  931.         if (!p.hasAttribute('data-no-aa'))
  932.           p.setAttribute('data-no-aa', '');
  933.         else
  934.           p.removeAttribute('data-no-aa');
  935.         break;
  936.       case 'ArrowRight':
  937.       case 'KeyJ':
  938.         Gallery.next(1);
  939.         break;
  940.       case 'ArrowLeft':
  941.       case 'KeyK':
  942.         Gallery.next(-1);
  943.         break;
  944.       case 'KeyD':
  945.         Remoting.saveFile();
  946.         break;
  947.       case 'KeyH': // flip horizontally
  948.       case 'KeyV': // flip vertically
  949.       case 'KeyL': // rotate left
  950.       case 'KeyR': // rotate right
  951.         if (!p)
  952.           return;
  953.         if (key === 'KeyH' || key === 'KeyV') {
  954.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  955.           ai[side] = !ai[side];
  956.         } else {
  957.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  958.         }
  959.         Bar.updateDetails();
  960.         Popup.move();
  961.         break;
  962.       case 'KeyM':
  963.         if (p.tagName === 'VIDEO')
  964.           p.muted = !p.muted;
  965.         break;
  966.       case 'KeyT':
  967.         GM.openInTab(Util.tabFixUrl() || p.src);
  968.         App.deactivate();
  969.         break;
  970.       case 'Minus':
  971.       case 'NumpadSubtract':
  972.         if (ai.zoomed) {
  973.           Events.zoomInOut(-1);
  974.         } else {
  975.           App.toggleZoom();
  976.         }
  977.         break;
  978.       case 'Equal':
  979.       case 'NumpadAdd':
  980.         if (ai.zoomed) {
  981.           Events.zoomInOut(1);
  982.         } else {
  983.           App.toggleZoom();
  984.         }
  985.         break;
  986.       case 'Escape':
  987.         App.deactivate({wait: true});
  988.         break;
  989.       case '!Alt':
  990.         return;
  991.       default:
  992.         App.deactivate({wait: true});
  993.         return;
  994.     }
  995.     dropEvent(e);
  996.   },
  997.  
  998.   onKeyUp(e) {
  999.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  1000.       Status.set('-shift');
  1001.       Bar.hide(true);
  1002.       if ((ai.popup || {}).controls)
  1003.         ai.popup.controls = false;
  1004.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1005.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1006.         ai.controlled = false;
  1007.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  1008.         App.toggleZoom();
  1009.       else
  1010.         App.deactivate({wait: true});
  1011.       ai.shiftKeyTime = 0;
  1012.     }
  1013.   },
  1014.  
  1015.   onContext(e) {
  1016.     if (Events.ignoreKeyHeld)
  1017.       return;
  1018.     const p = ai.popup;
  1019.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1020.       dropEvent(e);
  1021.     } else if (!p && (
  1022.       cfg.start === 'context' ||
  1023.       cfg.start === 'contextMK' ||
  1024.       cfg.start === 'contextM' && (e.button === 2) ||
  1025.       cfg.start === 'contextK' && (e.button !== 2) ||
  1026.       (cfg.start === 'auto' && ai.rule.manual)
  1027.     )) {
  1028.       // right-clicked on an image while the context menu is shown for something else
  1029.       if (!ai.node && !Events.hoverData)
  1030.         Events.onMouseOver(e);
  1031.       Events.onMouseOverThrottled(true);
  1032.       if (ai.node) {
  1033.         ai.force = true;
  1034.         App.start();
  1035.         dropEvent(e);
  1036.       }
  1037.     } else if (p) {
  1038.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1039.     }
  1040.   },
  1041.  
  1042.   pierceShadow(node, x, y) {
  1043.     for (let root; (root = node.shadowRoot);) {
  1044.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1045.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1046.       const inner = root.elementFromPoint(x, y);
  1047.       if (!inner || inner === node)
  1048.         break;
  1049.       node = inner;
  1050.     }
  1051.     return node;
  1052.   },
  1053.  
  1054.   toggle(enable) {
  1055.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1056.     const passive = {passive: true, capture: true};
  1057.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1058.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1059.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1060.     window[onOff]('keydown', Events.onKeyDown, true); // override normal page listeners
  1061.     window[onOff]('keyup', Events.onKeyUp, true);
  1062.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false});
  1063.   },
  1064.  
  1065.   trackMouse(e) {
  1066.     const cx = ai.cx = e.clientX;
  1067.     const cy = ai.cy = e.clientY;
  1068.     const r = ai.rect || (ai.rect = Calc.rect());
  1069.     ai.rectHovered =
  1070.       cx > r.left - 2 && cx < r.right + 2 &&
  1071.       cy > r.top - 2 && cy < r.bottom + 2;
  1072.   },
  1073.  
  1074.   zoomInOut(dir) {
  1075.     const i = Calc.scaleIndex(dir);
  1076.     const n = ai.scales.length;
  1077.     if (i >= 0 && i < n)
  1078.       ai.scale = ai.scales[i];
  1079.     const zo = cfg.zoomOut;
  1080.     if (i <= 0 && zo !== 'stay') {
  1081.       if (ai.scaleFit < ai.scale * .99) {
  1082.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1083.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1084.         App.deactivate({wait: true});
  1085.         return;
  1086.       }
  1087.       ai.zoomed = zo !== 'unzoom';
  1088.     } else {
  1089.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1090.     }
  1091.     if (ai.zooming)
  1092.       ai.popup.classList.add(`${PREFIX}zooming`);
  1093.     Popup.move();
  1094.     Bar.updateDetails();
  1095.   },
  1096. };
  1097.  
  1098. const Gallery = {
  1099.  
  1100.   makeParser(g) {
  1101.     return isFunction(g) ? g : Gallery.defaultParser;
  1102.   },
  1103.  
  1104.   findIndex(gUrl) {
  1105.     const sel = gUrl.split('#')[1];
  1106.     if (!sel)
  1107.       return 0;
  1108.     if (/^\d+$/.test(sel))
  1109.       return parseInt(sel);
  1110.     for (let i = ai.gNum; i--;) {
  1111.       let {url} = ai.gItems[i];
  1112.       if (Array.isArray(url))
  1113.         url = url[0];
  1114.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1115.         return i;
  1116.     }
  1117.     return 0;
  1118.   },
  1119.  
  1120.   next(dir) {
  1121.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1122.     const item = ai.gItems[ai.gIndex];
  1123.     if (Array.isArray(item.url)) {
  1124.       ai.urls = item.url.slice(1);
  1125.       ai.url = item.url[0];
  1126.     } else {
  1127.       ai.urls = null;
  1128.       ai.url = item.url;
  1129.     }
  1130.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1131.     App.startSingle();
  1132.     Bar.updateName();
  1133.   },
  1134.  
  1135.   nextIndex(dir) {
  1136.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1137.   },
  1138.  
  1139.   defaultParser(text, doc, docUrl, m, rule) {
  1140.     const {g} = rule;
  1141.     const qEntry = g.entry;
  1142.     const qCaption = ensureArray(g.caption);
  1143.     const qImage = g.image || 'img';
  1144.     const qTitle = g.title;
  1145.     const fix =
  1146.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1147.       (s => s.trim());
  1148.     const items = [...$$(qEntry || qImage, doc)]
  1149.       .map(processEntry)
  1150.       .filter(Boolean);
  1151.     items.title = processTitle();
  1152.     items.index =
  1153.       typeof g.index === 'string' &&
  1154.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1155.       RX_HAS_CODE.test(g.index) &&
  1156.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1157.       g.index;
  1158.     return items;
  1159.  
  1160.     function processEntry(entry) {
  1161.       const item = {};
  1162.       try {
  1163.         const img = qEntry ? $(qImage, entry) : entry;
  1164.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1165.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1166.       } catch (e) {}
  1167.       return item.url && item;
  1168.     }
  1169.  
  1170.     function processCaption(selector) {
  1171.       const el = $(selector, this) ||
  1172.                  $orSelf(selector, this.previousElementSibling) ||
  1173.                  $orSelf(selector, this.nextElementSibling);
  1174.       return el && fix(el.textContent);
  1175.     }
  1176.  
  1177.     function processTitle() {
  1178.       const el = $(qTitle, doc);
  1179.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1180.     }
  1181.  
  1182.     function $orSelf(selector, el) {
  1183.       if (el && !el.matches(qEntry))
  1184.         return el.matches(selector) ? el : $(selector, el);
  1185.     }
  1186.   },
  1187. };
  1188.  
  1189. const Menu = window === top && GM.registerMenuCommand && {
  1190.   curAltName: '',
  1191.   unreg: GM.unregisterMenuCommand,
  1192.   makeAltName: () => Menu.unreg
  1193.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1194.     : 'MPIV: toggle auto-start',
  1195.   register() {
  1196.     GM.registerMenuCommand('MPIV: configure', setup);
  1197.     Menu.registerAlt();
  1198.   },
  1199.   registerAlt() {
  1200.     if (cfg.startAltShown) {
  1201.       Menu.curAltName = Menu.makeAltName();
  1202.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1203.     }
  1204.   },
  1205.   reRegisterAlt() {
  1206.     const old = Menu.curAltName;
  1207.     if (old && Menu.unreg) Menu.unreg(old);
  1208.     if (!old || Menu.unreg) Menu.registerAlt();
  1209.   },
  1210.   onAltToggled() {
  1211.     const wasAuto = cfg.start === 'auto';
  1212.     if (wasAuto) {
  1213.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1214.     } else {
  1215.       cfg.startAlt = cfg.start;
  1216.       cfg.start = 'auto';
  1217.     }
  1218.     Menu.reRegisterAlt();
  1219.   },
  1220. };
  1221.  
  1222. const Popup = {
  1223.  
  1224.   async create(src, pageUrl) {
  1225.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1226.       (ai.popup.dataset.galleryFlip = '') === '';
  1227.     Popup.destroy();
  1228.     ai.imageUrl = src;
  1229.     if (!src)
  1230.       return;
  1231.     const myAi = ai;
  1232.     let [xhr, isVideo] = await CspSniffer.check(src);
  1233.     if (ai !== myAi)
  1234.       return;
  1235.     if (xhr)
  1236.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1237.     if (ai !== myAi || !src)
  1238.       return;
  1239.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1240.     p.id = `${PREFIX}popup`;
  1241.     p.src = src;
  1242.     p.addEventListener('error', App.handleError);
  1243.     if (ai.zooming)
  1244.       p.addEventListener('transitionend', Popup.onZoom);
  1245.     if (inGallery) {
  1246.       p.dataset.galleryFlip = '';
  1247.       p.setAttribute('loaded', '');
  1248.     }
  1249.     doc.body.insertBefore(p, ai.bar || undefined);
  1250.     await 0;
  1251.     if (App.checkProgress({start: true}) === false)
  1252.       return;
  1253.     if (p.complete)
  1254.       Popup.onLoad.call(ai.popup);
  1255.     else if (!isVideo)
  1256.       p.addEventListener('load', Popup.onLoad, {once: true});
  1257.   },
  1258.  
  1259.   destroy() {
  1260.     const p = ai.popup;
  1261.     if (!p) return;
  1262.     p.removeEventListener('load', Popup.onLoad);
  1263.     p.removeEventListener('error', App.handleError);
  1264.     if (isFunction(p.pause))
  1265.       p.pause();
  1266.     if (ai.blobUrl)
  1267.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1268.     p.remove();
  1269.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1270.   },
  1271.  
  1272.   move() {
  1273.     let x, y;
  1274.     const {cx, cy, extras, view} = ai;
  1275.     const vw = view.w - extras.outw;
  1276.     const vh = view.h - extras.outh;
  1277.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1278.     const h0 = ai.scale * ai.nheight + extras.inh;
  1279.     const isSwapped = ai.rotate % 180;
  1280.     const w = isSwapped ? h0 : w0;
  1281.     const h = isSwapped ? w0 : h0;
  1282.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1283.       const r = ai.rect;
  1284.       const rx = (r.left + r.right) / 2;
  1285.       const ry = (r.top + r.bottom) / 2;
  1286.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1287.         if (h < vh - 60)
  1288.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1289.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1290.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1291.         if (w < vw - 60)
  1292.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1293.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1294.       }
  1295.     }
  1296.     if (x == null) {
  1297.       x = vw > w
  1298.         ? (vw - w) / 2 + view.x
  1299.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1300.     }
  1301.     if (y == null) {
  1302.       y = vh > h
  1303.         ? (vh - h) / 2 + view.y
  1304.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1305.     }
  1306.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1307.     x += extras.o - diff;
  1308.     y += extras.o + diff;
  1309.     $css(ai.popup, {
  1310.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1311.                  `rotate(${ai.rotate || 0}deg) ` +
  1312.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1313.       width: `${Math.round(w0)}px`,
  1314.       height: `${Math.round(h0)}px`,
  1315.     });
  1316.   },
  1317.  
  1318.   onLoad() {
  1319.     if (this === ai.popup) {
  1320.       this.setAttribute('loaded', '');
  1321.       ai.popupLoaded = true;
  1322.       Status.set('-loading');
  1323.       if (ai.preloadUrl) {
  1324.         $create('img', {src: ai.preloadUrl});
  1325.         ai.preloadUrl = null;
  1326.       }
  1327.     }
  1328.   },
  1329.  
  1330.   onZoom() {
  1331.     this.classList.remove(`${PREFIX}zooming`);
  1332.   },
  1333. };
  1334.  
  1335. const PopupVideo = {
  1336.   async create() {
  1337.     ai.bufBar = false;
  1338.     ai.bufStart = now();
  1339.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1340.     return $create('video', {
  1341.       autoplay: true,
  1342.       controls: shouldMute,
  1343.       muted: shouldMute,
  1344.       loop: true,
  1345.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1346.       onprogress: PopupVideo.progress,
  1347.       oncanplaythrough: PopupVideo.progressDone,
  1348.       onvolumechange: PopupVideo.rememberVolume,
  1349.     });
  1350.   },
  1351.  
  1352.   progress() {
  1353.     const {duration} = this;
  1354.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1355.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1356.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1357.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1358.     }
  1359.   },
  1360.  
  1361.   progressDone() {
  1362.     this.onprogress = this.oncanplaythrough = null;
  1363.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1364.       Bar.set(false);
  1365.     Popup.onLoad.call(this);
  1366.   },
  1367.  
  1368.   rememberVolume() {
  1369.     GM.setValue('volume', this.volume);
  1370.   },
  1371. };
  1372.  
  1373. const Ruler = {
  1374. /*
  1375.  'u' works only with URLs so it's ignored if 'html' is true
  1376.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1377.    |foo = url or text must start with foo
  1378.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1379.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1380.  'r' is checked only if 'u' matches first
  1381. */
  1382.   init() {
  1383.     const errors = new Map();
  1384.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1385.     const hasGMAE = typeof GM_addElement === 'function';
  1386.     const canEval = nonce || hasGMAE;
  1387.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1388.     const evalRules = [];
  1389.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1390.     for (const [rule, err] of errors.entries()) {
  1391.       if (!RX_EVAL_BLOCKED.test(err)) {
  1392.         App.handleError('Invalid custom host rule:', rule);
  1393.         continue;
  1394.       }
  1395.       if (canEval) {
  1396.         evalCode.push(evalRules.length ? ',' : '',
  1397.           '[', customRules.indexOf(rule), ',{',
  1398.           ...Object.keys(FN_ARGS)
  1399.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1400.             .filter(Boolean),
  1401.           '}]');
  1402.       }
  1403.       evalRules.push(rule);
  1404.     }
  1405.     if (evalRules.length) {
  1406.       let result, wnd;
  1407.       if (canEval) {
  1408.         const GMAE = hasGMAE
  1409.           ? GM_addElement // eslint-disable-line no-undef
  1410.           : (tag, {textContent}) => document.head.appendChild(
  1411.             Object.assign(document.createElement(tag), {
  1412.               textContent: TRUSTED.createScript(textContent),
  1413.               nonce,
  1414.             }));
  1415.         evalCode.push(']; document.currentScript.remove();');
  1416.         GMAE('script', {textContent: evalCode.join('')});
  1417.         result = (wnd = unsafeWindow)[evalId] ||
  1418.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1419.       }
  1420.       if (result) {
  1421.         for (const [index, fns] of result) {
  1422.           Object.assign(customRules[index], fns);
  1423.         }
  1424.         delete wnd[evalId];
  1425.       } else {
  1426.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1427.       }
  1428.     }
  1429.  
  1430.     // rules that disable previewing
  1431.     const disablers = [
  1432.       dotDomain.endsWith('.stackoverflow.com') && {
  1433.         e: '.post-tag, .post-tag img',
  1434.         s: '',
  1435.       },
  1436.       {
  1437.         u: '||disqus.com/',
  1438.         s: '',
  1439.       },
  1440.     ];
  1441.  
  1442.     // optimization: a rule is created only when on domain
  1443.     const perDomain = [
  1444.       hostname.includes('startpage') && {
  1445.         r: /\boiu=(.+)/,
  1446.         s: '$1',
  1447.         follow: true,
  1448.       },
  1449.       dotDomain.endsWith('.4chan.org') && {
  1450.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1451.         q: '.op .fileText a',
  1452.         css: '#post-preview{display:none}',
  1453.       },
  1454.       hostname.includes('amazon.') && {
  1455.         r: /.+?images\/I\/.+?\./,
  1456.         s: m => {
  1457.           const uh = doc.getElementById('universal-hover');
  1458.           return uh ? '' : m[0] + 'jpg';
  1459.         },
  1460.         css: '#zoomWindow{display:none!important;}',
  1461.       },
  1462.       dotDomain.endsWith('.bing.com') && {
  1463.         e: 'a[m*="murl"]',
  1464.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1465.         s: '$1',
  1466.         html: true,
  1467.       },
  1468.       ...dotDomain.endsWith('.deviantart.com') && [{
  1469.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1470.         s: (m, node) =>
  1471.           $propUp(node, 'data-super-full-img') ||
  1472.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1473.           node.dataset.embedId && node.src,
  1474.       }, {
  1475.         e: '.dev-view-deviation img',
  1476.         s: () => [
  1477.           $('.dev-page-download').href,
  1478.           $('.dev-content-full').src,
  1479.         ].filter(Boolean),
  1480.       }, {
  1481.         e: 'a[data-hook=deviation_link]',
  1482.         q: 'link[as=image]',
  1483.       }] || [],
  1484.       dotDomain.endsWith('.discord.com') && {
  1485.         u: '||discordapp.net/external/',
  1486.         r: /\/https?\/(.+)/,
  1487.         s: '//$1',
  1488.         follow: true,
  1489.       },
  1490.       dotDomain.endsWith('.dropbox.com') && {
  1491.         r: /(.+?&size_mode)=\d+(.*)/,
  1492.         s: '$1=5$2',
  1493.       },
  1494.       dotDomain.endsWith('.facebook.com') && {
  1495.         e: 'a[href*="ref=hovercard"]',
  1496.         s: (m, node) =>
  1497.           'https://www.facebook.com/photo.php?fbid=' +
  1498.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1499.         follow: true,
  1500.       },
  1501.       dotDomain.endsWith('.facebook.com') && {
  1502.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1503.         s: (m, node) =>
  1504.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1505.             decodeURIComponent(m[4]),
  1506.         html: true,
  1507.         follow: true,
  1508.       },
  1509.       dotDomain.endsWith('.flickr.com') &&
  1510.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1511.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1512.         s: m => `https://www.flickr.com/services/rest/?${
  1513.           new URLSearchParams({
  1514.             photo_id: m[1],
  1515.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1516.             method: 'flickr.photos.getSizes',
  1517.             format: 'json',
  1518.             nojsoncallback: 1,
  1519.           }).toString()}`,
  1520.         q: text => JSON.parse(text).sizes.size.pop().source,
  1521.         anonymous: true,
  1522.       },
  1523.       dotDomain.endsWith('.github.com') && {
  1524.         r: new RegExp([
  1525.           /(avatars.+?&s=)\d+/,
  1526.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1527.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1528.         ].map(rx => rx.source).join('|')),
  1529.         s: m => `https://${
  1530.           m[1] ? `${m[1]}460` :
  1531.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1532.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1533.         }`,
  1534.       },
  1535.       isGoogleImages && {
  1536.         e: 'a[href*="imgres?imgurl="] img',
  1537.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1538.         follow: true,
  1539.       },
  1540.       isGoogleImages && {
  1541.         e: '[data-tbnid] a:not([href])',
  1542.         s: (m, a) => {
  1543.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1544.           new MutationObserver((_, mo) => {
  1545.             mo.disconnect();
  1546.             App.isEnabled = true;
  1547.             a.alt = a2.innerText;
  1548.             const {left, top} = a.getBoundingClientRect();
  1549.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1550.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1551.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1552.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1553.         },
  1554.       },
  1555.       dotDomain.endsWith('.instagram.com') && {
  1556.         e: 'a[href*="/p/"],' +
  1557.           'article [role="button"][tabindex="0"],' +
  1558.           'article [role="button"][tabindex="0"] div',
  1559.         s: (m, node, rule) => {
  1560.           let data, a, n, img, src;
  1561.           if (location.pathname.startsWith('/p/')) {
  1562.             img = $('img[srcset], video', node.parentNode);
  1563.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1564.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1565.           }
  1566.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1567.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1568.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1569.           }
  1570.           const numPics = a && tryCatch(() => data.edge_sidecar_to_children.edges.length);
  1571.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1572.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1573.           rule.follow = !data && !rule.g;
  1574.           rule._data = data;
  1575.           rule._img = img;
  1576.           return (
  1577.             !a && !src ? false :
  1578.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1579.                 data.video_url || data.display_url);
  1580.         },
  1581.         c: (html, doc, node, rule) =>
  1582.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1583.         follow: true,
  1584.         _q: 'meta[property="og:video"]',
  1585.         _g(text, doc, url, m, rule) {
  1586.           const media = JSON.parse(text).graphql.shortcode_media;
  1587.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1588.             url: e.node.video_url || e.node.display_url,
  1589.           }));
  1590.           items.title = tryCatch(rule._getCaption, media) || '';
  1591.           return items;
  1592.         },
  1593.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1594.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1595.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1596.       },
  1597.       ...dotDomain.endsWith('.reddit.com') && [{
  1598.         u: '||i.reddituploads.com/',
  1599.       }, {
  1600.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1601.         s: (m, node) => $propUp(node, 'data-url'),
  1602.       }, {
  1603.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1604.         s: 'https://i$1',
  1605.       }] || [],
  1606.       dotDomain.endsWith('.tumblr.com') && {
  1607.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1608.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1609.         follow: true,
  1610.       },
  1611.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1612.         e: 'a.media-item, a.js-media-image-link',
  1613.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1614.         follow: true,
  1615.       },
  1616.       dotDomain.endsWith('.twitter.com') && {
  1617.         e: '.grid-tweet > .media-overlay',
  1618.         s: (m, node) => node.previousElementSibling.src,
  1619.         follow: true,
  1620.       },
  1621.     ];
  1622.  
  1623.     const main = [
  1624.       {
  1625.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1626.         s: '$1',
  1627.         follow: true,
  1628.         onerror: 'skip',
  1629.       },
  1630.       {
  1631.         u: [
  1632.           '||500px.com/photo/',
  1633.           '||cl.ly/',
  1634.           '||cweb-pix.com/',
  1635.           '//ibb.co/',
  1636.           '||imgcredit.xyz/image/',
  1637.         ],
  1638.         r: /\.\w+\/.+/,
  1639.         q: 'meta[property="og:image"]',
  1640.       },
  1641.       {
  1642.         u: 'attachment.php',
  1643.         r: /attachment\.php.+attachmentid/,
  1644.       },
  1645.       {
  1646.         u: '||abload.de/image',
  1647.         q: '#image',
  1648.       },
  1649.       {
  1650.         u: '||deviantart.com/art/',
  1651.         s: (m, node) =>
  1652.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1653.             '' :
  1654.             m.input,
  1655.         q: [
  1656.           '#download-button[href*=".jpg"]',
  1657.           '#download-button[href*=".jpeg"]',
  1658.           '#download-button[href*=".gif"]',
  1659.           '#download-button[href*=".png"]',
  1660.           '#gmi-ResViewSizer_fullimg',
  1661.           'img.dev-content-full',
  1662.         ],
  1663.       },
  1664.       {
  1665.         u: '||dropbox.com/s',
  1666.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1667.         q: (text, doc) =>
  1668.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1669.       },
  1670.       {
  1671.         r: /[./]ebay\.[^/]+\/itm\//,
  1672.         q: text =>
  1673.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1674.             .replace(/~~60_\d+/, '~~60_57'),
  1675.       },
  1676.       {
  1677.         u: '||i.ebayimg.com/',
  1678.         s: (m, node) =>
  1679.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1680.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1681.       },
  1682.       {
  1683.         u: '||fastpic.',
  1684.         e: 'a[href*="fastpic"][href*=".html"]',
  1685.         s: m => m[0].replace('http:', 'https:').replace('fastpic.ru', 'fastpic.org'),
  1686.         q: 'img[src*="/big/"]',
  1687.       },
  1688.       {
  1689.         u: '||facebook.com/',
  1690.         r: /photo\.php|[^/]+\/photos\//,
  1691.         s: (m, node) =>
  1692.           node.id === 'fbPhotoImage' ? false :
  1693.             /gradient\.png$/.test(m.input) ? '' :
  1694.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1695.         q: [
  1696.           'div + span > a:first-child:not([href*="tag_faces"])',
  1697.           'div + span > a[href*="tag_faces"] ~ a',
  1698.         ],
  1699.         rect: '#fbProfileCover',
  1700.       },
  1701.       {
  1702.         u: '||fbcdn.',
  1703.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1704.         s: m =>
  1705.           dotDomain.endsWith('.facebook.com') &&
  1706.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1707.           false,
  1708.         manual: true,
  1709.       },
  1710.       {
  1711.         u: ['||fbcdn-', 'fbcdn.net/'],
  1712.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1713.         s: (m, node) => {
  1714.           if (node.id === 'fbPhotoImage') {
  1715.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1716.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1717.           }
  1718.           if (m[4])
  1719.             return false;
  1720.           const pn = node.parentNode;
  1721.           if (pn.outerHTML.includes('/hovercard/'))
  1722.             return '';
  1723.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1724.             return false;
  1725.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1726.         },
  1727.         rect: '.photoWrap',
  1728.       },
  1729.       {
  1730.         u: '||flickr.com/photos/',
  1731.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1732.         s: m =>
  1733.           m.input.indexOf('/sizes/') < 0 ?
  1734.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1735.             false,
  1736.         q: (text, doc) => {
  1737.           const links = $$('.sizes-list a', doc);
  1738.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1739.         },
  1740.         follow: true,
  1741.       },
  1742.       {
  1743.         u: '||flickr.com/photos/',
  1744.         r: /\/sizes\//,
  1745.         q: '#allsizes-photo > img',
  1746.       },
  1747.       {
  1748.         u: '||gfycat.com/',
  1749.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1750.         s: 'https://$1$3',
  1751.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1752.       },
  1753.       {
  1754.         u: [
  1755.           '||googleusercontent.com/proxy',
  1756.           '||googleusercontent.com/gadgets/proxy',
  1757.         ],
  1758.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1759.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1760.       },
  1761.       {
  1762.         u: [
  1763.           '||googleusercontent.com/',
  1764.           '||ggpht.com/',
  1765.         ],
  1766.         s: m => m.input.includes('webcache.') ? '' :
  1767.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1768.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1769.       },
  1770.       {
  1771.         u: '||gravatar.com/',
  1772.         r: /([a-z0-9]{32})/,
  1773.         s: 'https://gravatar.com/avatar/$1?s=200',
  1774.       },
  1775.       {
  1776.         u: '//gyazo.com/',
  1777.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1778.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1779.         _q: 'meta[name="twitter:image"]',
  1780.       },
  1781.       {
  1782.         u: '||hostingkartinok.com/show-image.php',
  1783.         q: '.image img',
  1784.       },
  1785.       {
  1786.         u: [
  1787.           '||imagecurl.com/images/',
  1788.           '||imagecurl.com/viewer.php',
  1789.         ],
  1790.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1791.         s: 'https://imagecurl.com/images/$1$2$3',
  1792.       },
  1793.       {
  1794.         u: '||imagebam.com/image/',
  1795.         q: 'meta[property="og:image"]',
  1796.         tabfix: true,
  1797.         xhr: hostname.includes('planetsuzy'),
  1798.       },
  1799.       {
  1800.         u: '||imageban.ru/thumbs',
  1801.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1802.         s: '$1out$2/$3/$4',
  1803.       },
  1804.       {
  1805.         u: [
  1806.           '||imageban.ru/show',
  1807.           '||imageban.net/show',
  1808.           '||ibn.im/',
  1809.         ],
  1810.         q: '#img_main',
  1811.       },
  1812.       {
  1813.         u: '||imageshack.us/img',
  1814.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1815.         s: 'https://$2/download/$1/$3$4',
  1816.       },
  1817.       {
  1818.         u: '||imageshack.us/i/',
  1819.         q: '#share-dl',
  1820.       },
  1821.       {
  1822.         u: '||imageteam.org/img',
  1823.         q: 'img[alt="image"]',
  1824.       },
  1825.       {
  1826.         u: [
  1827.           '||imagetwist.com/',
  1828.           '||imageshimage.com/',
  1829.         ],
  1830.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1831.         q: 'img.pic',
  1832.         xhr: true,
  1833.       },
  1834.       {
  1835.         u: '||imageupper.com/i/',
  1836.         q: '#img',
  1837.         xhr: true,
  1838.       },
  1839.       {
  1840.         u: '||imagevenue.com/',
  1841.         q: 'a[data-toggle="full"] img',
  1842.       },
  1843.       {
  1844.         u: '||imagezilla.net/show/',
  1845.         q: '#photo',
  1846.         xhr: true,
  1847.       },
  1848.       {
  1849.         u: [
  1850.           '||images-na.ssl-images-amazon.com/images/',
  1851.           '||media-imdb.com/images/',
  1852.         ],
  1853.         r: /images\/.+?\.jpg/,
  1854.         s: '/V1\\.?_.+?\\.//g',
  1855.       },
  1856.       {
  1857.         u: '||imgbox.com/',
  1858.         r: /\.com\/([a-z0-9]+)$/i,
  1859.         q: '#img',
  1860.         xhr: hostname !== 'imgbox.com',
  1861.       },
  1862.       {
  1863.         u: '||imgclick.net/',
  1864.         r: /\.net\/(\w+)/,
  1865.         q: 'img.pic',
  1866.         xhr: true,
  1867.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1868.       },
  1869.       {
  1870.         u: '.imgcredit.xyz/',
  1871.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1872.         s: ['https$1$2', 'https$1.png'],
  1873.       },
  1874.       {
  1875.         u: [
  1876.           '||imgflip.com/i/',
  1877.           '||imgflip.com/gif/',
  1878.         ],
  1879.         r: /\/(i|gif)\/([^/?#]+)/,
  1880.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1881.       },
  1882.       {
  1883.         u: [
  1884.           '||imgur.com/a/',
  1885.           '||imgur.com/gallery/',
  1886.         ],
  1887.         g: async (text, doc, url, m, rule, node, cb) => {
  1888.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1889.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1890.           const images = ((info || 0).data || 0).images;
  1891.           const items = [];
  1892.           for (const img of images || []) {
  1893.             u = `https://i.imgur.com/${img.hash}`;
  1894.             items.push({
  1895.               url: img.ext === '.gif' && img.animated !== false ?
  1896.                 [`${u}.webm`, `${u}.mp4`, u] :
  1897.                 u + img.ext,
  1898.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1899.             });
  1900.           }
  1901.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1902.             items.title = info.title;
  1903.           cb(items);
  1904.         },
  1905.         css: '.post > .hover { display:none!important; }',
  1906.       },
  1907.       {
  1908.         u: '||imgur.com/',
  1909.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1910.         s: 'gallery',
  1911.         g: (text, doc, url, m) =>
  1912.           m[2].split(',').map(id => ({
  1913.             url: `https://i.${m[1]}${id}.jpg`,
  1914.           })),
  1915.       },
  1916.       {
  1917.         u: '||imgur.com/',
  1918.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1919.         s: (m, node) => {
  1920.           if (/memegen|random|register|search|signin/.test(m.input))
  1921.             return '';
  1922.           const a = node.closest('a');
  1923.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1924.             return false;
  1925.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1926.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1927.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1928.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1929.           return ext === 'webm' ?
  1930.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1931.             u + ext;
  1932.         },
  1933.       },
  1934.       {
  1935.         u: [
  1936.           '||instagr.am/p/',
  1937.           '||instagram.com/p/',
  1938.         ],
  1939.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1940.         q: text => {
  1941.           const m = JSON.parse(text).graphql.shortcode_media;
  1942.           return m.video_url || m.display_url;
  1943.         },
  1944.         rect: 'div.PhotoGridMediaItem',
  1945.         c: text => {
  1946.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1947.           return m === undefined ? '(no caption)' : m.node.text;
  1948.         },
  1949.       },
  1950.       {
  1951.         u: [
  1952.           '||livememe.com/',
  1953.           '||lvme.me/',
  1954.         ],
  1955.         r: /\.\w+\/([^.]+)$/,
  1956.         s: 'http://i.lvme.me/$1.jpg',
  1957.       },
  1958.       {
  1959.         u: '||lostpic.net/image',
  1960.         q: '.image-viewer-image img',
  1961.       },
  1962.       {
  1963.         u: '||makeameme.org/meme/',
  1964.         r: /\/meme\/([^/?#]+)/,
  1965.         s: 'https://media.makeameme.org/created/$1.jpg',
  1966.       },
  1967.       {
  1968.         u: '||photobucket.com/',
  1969.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1970.         s: 'https://i$1$3',
  1971.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1972.       },
  1973.       {
  1974.         u: '||piccy.info/view3/',
  1975.         r: /(.+?\/view3)\/(.*)\//,
  1976.         s: '$1/$2/orig/',
  1977.         q: '#mainim',
  1978.       },
  1979.       {
  1980.         u: '||pimpandhost.com/image/',
  1981.         r: /(.+?\/image\/[0-9]+)/,
  1982.         s: '$1?size=original',
  1983.         q: 'img.original',
  1984.       },
  1985.       {
  1986.         u: [
  1987.           '||pixroute.com/',
  1988.           '||imgspice.com/',
  1989.         ],
  1990.         r: /\.html$/,
  1991.         q: 'img[id]',
  1992.         xhr: true,
  1993.       },
  1994.       {
  1995.         u: '||postima',
  1996.         r: /postima?ge?\.org\/image\/\w+/,
  1997.         q: [
  1998.           'a[href*="dl="]',
  1999.           '#main-image',
  2000.         ],
  2001.       },
  2002.       {
  2003.         u: [
  2004.           '||prntscr.com/',
  2005.           '||prnt.sc/',
  2006.         ],
  2007.         r: /\.\w+\/.+/,
  2008.         q: 'meta[property="og:image"]',
  2009.         xhr: true,
  2010.       },
  2011.       {
  2012.         u: '||radikal.ru/',
  2013.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2014.         s: (m, node, rule) =>
  2015.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2016.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2017.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2018.       },
  2019.       {
  2020.         u: '||tumblr.com',
  2021.         r: /_500\.jpg/,
  2022.         s: ['/_500/_1280/', ''],
  2023.       },
  2024.       {
  2025.         u: '||twimg.com/media/',
  2026.         r: /.+?format=(jpe?g|png|gif)/i,
  2027.         s: '$0&name=orig',
  2028.       },
  2029.       {
  2030.         u: '||twimg.com/media/',
  2031.         r: /.+?\.(jpe?g|png|gif)/i,
  2032.         s: '$0:orig',
  2033.       },
  2034.       {
  2035.         u: '||twimg.com/1/proxy',
  2036.         r: /t=([^&_]+)/i,
  2037.         s: m => atob(m[1]).match(/http.+/),
  2038.       },
  2039.       {
  2040.         u: '||twimg.com/',
  2041.         r: /\/profile_images/i,
  2042.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2043.       },
  2044.       {
  2045.         u: '||pic.twitter.com/',
  2046.         r: /\.com\/[a-z0-9]+/i,
  2047.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2048.         follow: true,
  2049.       },
  2050.       {
  2051.         u: '||twitpic.com/',
  2052.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2053.         s: 'https://twitpic.com/show/large/$2',
  2054.       },
  2055.       {
  2056.         u: '||wiki',
  2057.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  2058.         s: '/\\/thumb(?=\\/)|' +
  2059.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  2060.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  2061.         xhr: !hostname.includes('wiki'),
  2062.       },
  2063.       {
  2064.         u: '||ytimg.com/vi/',
  2065.         r: /(.+?\/vi\/[^/]+)/,
  2066.         s: '$1/0.jpg',
  2067.         rect: '.video-list-item',
  2068.       },
  2069.       {
  2070.         u: '/viewer.php?file=',
  2071.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2072.         s: '$1/images/$2',
  2073.         xhr: true,
  2074.       },
  2075.       {
  2076.         u: '/thumb_',
  2077.         r: /\/albums.+\/thumb_[^/]/,
  2078.         s: '/thumb_//',
  2079.       },
  2080.       {
  2081.         u: [
  2082.           '.th.jp',
  2083.           '.th.gif',
  2084.           '.th.png',
  2085.         ],
  2086.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2087.         s: '$1$2',
  2088.         follow: true,
  2089.       },
  2090.       {
  2091.         r: RX_MEDIA_URL,
  2092.       },
  2093.     ];
  2094.  
  2095.     /** @type mpiv.HostRule[] */
  2096.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2097.       .forEach(rule => {
  2098.         if (Array.isArray(rule.e))
  2099.           rule.e = rule.e.join(',');
  2100.       });
  2101.   },
  2102.  
  2103.   format(rule, {expand} = {}) {
  2104.     const s = Util.stringify(rule, null, ' ');
  2105.     return expand ?
  2106.       /* {"a": ...,
  2107.           "b": ...,
  2108.           "c": ...
  2109.          } */
  2110.       s.replace(/^{\s+/g, '{') :
  2111.       /* {"a": ..., "b": ..., "c": ...} */
  2112.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2113.   },
  2114.  
  2115.   fromElement(el) {
  2116.     const text = el.textContent.trim();
  2117.     if (text.startsWith('{') &&
  2118.         text.endsWith('}') &&
  2119.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2120.       const rule = tryCatch(JSON.parse, text);
  2121.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2122.     }
  2123.   },
  2124.  
  2125.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2126.  
  2127.   /** @returns mpiv.HostRule | Error | false | undefined */
  2128.   parse(rule) {
  2129.     const isBatchOp = this instanceof Map;
  2130.     try {
  2131.       if (typeof rule === 'string')
  2132.         rule = JSON.parse(rule);
  2133.       if ('d' in rule && typeof rule.d !== 'string')
  2134.         rule.d = undefined;
  2135.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2136.         return false;
  2137.       if ('e' in rule) {
  2138.         let {e} = rule;
  2139.         if (typeof e === 'string') {
  2140.           e = e.trim();
  2141.         } else if (
  2142.           Array.isArray(e) && !e.every((s, i) => typeof s === 'string' && (e[i] = s.trim())) ||
  2143.           e && !Object.entries(e).filter(Ruler.isValidE2).length
  2144.         ) {
  2145.           throw new Error('Invalid syntax for "e". Examples: ' +
  2146.             '"e": ".image" or ' +
  2147.             '"e": [".image1", ".image2"] or ' +
  2148.             '"e": {".parent": ".image"} or ' +
  2149.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2150.         }
  2151.         if (isBatchOp) rule.e = e || undefined;
  2152.       }
  2153.       let compileTo = isBatchOp ? rule : {};
  2154.       if (rule.r)
  2155.         compileTo.r = new RegExp(rule.r, 'i');
  2156.       if (App.NOP)
  2157.         compileTo = {};
  2158.       for (const key of Object.keys(FN_ARGS)) {
  2159.         if (RX_HAS_CODE.test(rule[key])) {
  2160.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2161.           if (fn !== App.NOP || !isBatchOp) {
  2162.             compileTo[key] = fn;
  2163.           } else if (isBatchOp) {
  2164.             this.set(rule, 'unsafe-eval');
  2165.           }
  2166.         }
  2167.       }
  2168.       return rule;
  2169.     } catch (err) {
  2170.       if (isBatchOp) {
  2171.         this.set(rule, err);
  2172.         return rule;
  2173.       } else {
  2174.         return err;
  2175.       }
  2176.     }
  2177.   },
  2178.  
  2179.   runC(text, doc = document) {
  2180.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2181.     ai.caption = fn(text, doc);
  2182.   },
  2183.  
  2184.   runCHandler: {
  2185.     function: (text, doc) =>
  2186.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2187.     string: (text, doc) => {
  2188.       const el = $many(ai.rule.c, doc);
  2189.       return !el ? '' :
  2190.         el.getAttribute('content') ||
  2191.         el.getAttribute('title') ||
  2192.         el.textContent;
  2193.     },
  2194.     default: () =>
  2195.       (ai.tooltip || 0).text ||
  2196.       ai.node.alt ||
  2197.       $propUp(ai.node, 'title') ||
  2198.       Remoting.getFileName(
  2199.         ai.node.tagName === (ai.popup || 0).tagName
  2200.           ? ai.url
  2201.           : ai.node.src || $propUp(ai.node, 'href')),
  2202.   },
  2203.  
  2204.   runQ(text, doc, docUrl) {
  2205.     let url;
  2206.     if (isFunction(ai.rule.q)) {
  2207.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2208.       if (Array.isArray(url)) {
  2209.         ai.urls = url.slice(1);
  2210.         url = url[0];
  2211.       }
  2212.     } else {
  2213.       const el = $many(ai.rule.q, doc);
  2214.       url = Remoting.findImageUrl(el, docUrl);
  2215.     }
  2216.     return url;
  2217.   },
  2218.  
  2219.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2220.   runE(rule, node) {
  2221.     const {e} = rule;
  2222.     if (typeof e === 'string')
  2223.       return node.matches(e);
  2224.     let p, img, res, info;
  2225.     for (const selParent in e) {
  2226.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2227.         if (img === node)
  2228.           res = true;
  2229.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2230.           return info;
  2231.       }
  2232.     }
  2233.     return res;
  2234.   },
  2235.  
  2236.   /** @returns {?Array} if falsy then the rule should be skipped */
  2237.   runS(node, rule, m) {
  2238.     let urls = [];
  2239.     for (const s of ensureArray(rule.s))
  2240.       urls.push(
  2241.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2242.           isFunction(s) ? s(m, node, rule) :
  2243.             s);
  2244.     if (rule.q && urls.length > 1) {
  2245.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2246.       return;
  2247.     }
  2248.     if (Array.isArray(urls[0]))
  2249.       urls = urls[0];
  2250.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2251.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2252.   },
  2253.  
  2254.   /** @returns {boolean} */
  2255.   runU(rule, url) {
  2256.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2257.     return u.fn.call(u.data, url);
  2258.   },
  2259.  
  2260.   substituteSingle(s, m) {
  2261.     if (!m || m.input == null) return s;
  2262.     if (s.startsWith('/') && !s.startsWith('//')) {
  2263.       const mid = s.search(/[^\\]\//) + 1;
  2264.       const end = s.lastIndexOf('/');
  2265.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2266.       return m.input.replace(re, s.slice(mid + 1, end));
  2267.     }
  2268.     if (m.length && s.includes('$')) {
  2269.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2270.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2271.         for (let i = maxLength; i >= 0; i--) {
  2272.           const part = num.slice(0, i) | 0;
  2273.           if (part < m.length)
  2274.             return (m[part] || '') + num.slice(i);
  2275.         }
  2276.         return text;
  2277.       });
  2278.     }
  2279.     return s;
  2280.   },
  2281.  
  2282.   toggle(rule, prop, condition) {
  2283.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2284.     return condition;
  2285.   },
  2286. };
  2287.  
  2288. const RuleMatcher = {
  2289.  
  2290.   /** @returns {Object} */
  2291.   adaptiveFind(node, opts) {
  2292.     const tn = node.tagName;
  2293.     const src = node.currentSrc || node.src;
  2294.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2295.     let a, info, url;
  2296.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2297.     if (tn !== 'A') {
  2298.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2299.       info = RuleMatcher.find(url, node, opts);
  2300.     }
  2301.     if (!info && (a = node.closest('A'))) {
  2302.       const ds = a.dataset;
  2303.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2304.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2305.       url = !url.startsWith('data:') && url;
  2306.       info = RuleMatcher.find(url, a, opts);
  2307.     }
  2308.     if (!info && isPic)
  2309.       info = {node, rule: {}, url: src};
  2310.     return info;
  2311.   },
  2312.  
  2313.   /** @returns ?mpiv.RuleMatchInfo */
  2314.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2315.     const tn = node.tagName;
  2316.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2317.     const isPicOrLink = isPic || tn === 'A';
  2318.     let m, html, info;
  2319.     for (const rule of rules || Ruler.rules) {
  2320.       if (skipRules && skipRules.includes(rule) ||
  2321.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2322.           rule.e && !rules && !(info = Ruler.runE(rule, node)))
  2323.         continue;
  2324.       if (info && info.url)
  2325.         return info;
  2326.       if (rule.r)
  2327.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2328.           ? rule.r.exec(html || (html = node.outerHTML))
  2329.           : url && rule.r.exec(url);
  2330.       else if (url)
  2331.         m = Object.assign([url], {index: 0, input: url});
  2332.       else
  2333.         m = [];
  2334.       if (!m)
  2335.         continue;
  2336.       if (rule.s === '')
  2337.         return {};
  2338.       let hasS = rule.s != null;
  2339.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2340.       // but we'll only allow it to match rules without 's' in the nested find call
  2341.       if (isPic && !hasS && !skipRules)
  2342.         continue;
  2343.       hasS &= rule.s !== 'gallery';
  2344.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2345.       if (urls)
  2346.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2347.     }
  2348.   },
  2349.  
  2350.   /** @returns ?mpiv.RuleMatchInfo */
  2351.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2352.     let info;
  2353.     let url = `${urls[0]}`;
  2354.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2355.     if (url)
  2356.       url = Util.rel2abs(url);
  2357.     else
  2358.       info = {};
  2359.     if (follow)
  2360.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2361.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2362.       const xhr = cfg.xhr && rule.xhr;
  2363.       info = {
  2364.         match,
  2365.         node,
  2366.         rule,
  2367.         url,
  2368.         urls: urls.length > 1 ? urls.slice(1) : null,
  2369.         gallery: rule.g && Gallery.makeParser(rule.g),
  2370.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2371.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2372.       };
  2373.     }
  2374.     return info;
  2375.   },
  2376.  
  2377.   isFollowableUrl(url, rule) {
  2378.     const f = rule.follow;
  2379.     return isFunction(f) ? f(url) : f;
  2380.   },
  2381. };
  2382.  
  2383. const Remoting = {
  2384.  
  2385.   gmXhr(url, opts = {}) {
  2386.     if (ai.req)
  2387.       tryCatch.call(ai.req, ai.req.abort);
  2388.     return new Promise((resolve, reject) => {
  2389.       const {anonymous} = ai.rule || {};
  2390.       ai.req = GM.xmlHttpRequest({
  2391.         url,
  2392.         anonymous,
  2393.         withCredentials: !anonymous,
  2394.         method: 'GET',
  2395.         timeout: 30e3,
  2396.         ...opts,
  2397.         onload: done,
  2398.         onerror: done,
  2399.         ontimeout() {
  2400.           ai.req = null;
  2401.           reject(`Timeout fetching ${url}`);
  2402.         },
  2403.       });
  2404.       function done(r) {
  2405.         ai.req = null;
  2406.         if (r.status < 400 && !r.error)
  2407.           resolve(r);
  2408.         else
  2409.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2410.       }
  2411.     });
  2412.   },
  2413.  
  2414.   async getDoc(url) {
  2415.     if (!url) {
  2416.       // current document
  2417.       return {
  2418.         doc,
  2419.         finalUrl: location.href,
  2420.         responseText: doc.documentElement.outerHTML,
  2421.       };
  2422.     }
  2423.     const r = await (!ai.post ?
  2424.       Remoting.gmXhr(url) :
  2425.       Remoting.gmXhr(url, {
  2426.         method: 'POST',
  2427.         data: ai.post,
  2428.         headers: {
  2429.           'Content-Type': 'application/x-www-form-urlencoded',
  2430.           'Referer': url,
  2431.         },
  2432.       }));
  2433.     r.doc = $parseHtml(r.responseText);
  2434.     return r;
  2435.   },
  2436.  
  2437.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2438.     ai.bufBar = false;
  2439.     ai.bufStart = now();
  2440.     const response = await Remoting.gmXhr(url, {
  2441.       responseType: 'blob',
  2442.       headers: {
  2443.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2444.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2445.       },
  2446.       onprogress: Remoting.getImageProgress,
  2447.     });
  2448.     Bar.set(false);
  2449.     const type = Remoting.guessMimeType(response);
  2450.     let b = response.response;
  2451.     if (!b) throw 'Empty response';
  2452.     if (b.type !== type)
  2453.       b = b.slice(0, b.size, type);
  2454.     const res = xhr === 'blob'
  2455.       ? (ai.blobUrl = URL.createObjectURL(b))
  2456.       : await Remoting.blobToDataUrl(b);
  2457.     return [res, type.startsWith('video')];
  2458.   },
  2459.  
  2460.   getImageProgress(e) {
  2461.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2462.       ai.bufBar = true;
  2463.     if (ai.bufBar) {
  2464.       const pct = e.loaded / e.total * 100 | 0;
  2465.       const size = e.total / 1024 | 0;
  2466.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2467.     }
  2468.   },
  2469.  
  2470.   async findRedirect() {
  2471.     try {
  2472.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2473.         method: 'HEAD',
  2474.         headers: {
  2475.           'Referer': location.href.split('#', 1)[0],
  2476.         },
  2477.       });
  2478.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2479.       if (!info || !info.url)
  2480.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2481.       Object.assign(ai, info);
  2482.       App.startSingle();
  2483.     } catch (e) {
  2484.       App.handleError(e);
  2485.     }
  2486.   },
  2487.  
  2488.   async saveFile() {
  2489.     const url = ai.popup.src || ai.popup.currentSrc;
  2490.     let name = Remoting.getFileName(ai.imageUrl || url);
  2491.     if (!name.includes('.'))
  2492.       name += '.jpg';
  2493.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2494.       $create('a', {href: url, download: name})
  2495.         .dispatchEvent(new MouseEvent('click'));
  2496.     } else {
  2497.       Status.set('+loading');
  2498.       const onload = () => Status.set('-loading');
  2499.       const gmDL = typeof GM_download === 'function';
  2500.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2501.         url,
  2502.         name,
  2503.         headers: {Referer: url},
  2504.         method: 'get', // polyfilling GM_download
  2505.         responseType: 'blob', // polyfilling GM_download
  2506.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2507.         onerror: e => {
  2508.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2509.           onload();
  2510.         },
  2511.         onprogress: Remoting.getImageProgress,
  2512.         onload({response}) {
  2513.           onload();
  2514.           if (!gmDL) { // polyfilling GM_download
  2515.             const a = Object.assign(document.createElement('a'), {
  2516.               href: URL.createObjectURL(response),
  2517.               download: name,
  2518.             });
  2519.             a.dispatchEvent(new MouseEvent('click'));
  2520.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2521.           }
  2522.         },
  2523.       });
  2524.     }
  2525.   },
  2526.  
  2527.   getFileName(url) {
  2528.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2529.   },
  2530.  
  2531.   blobToDataUrl(blob) {
  2532.     return new Promise((resolve, reject) => {
  2533.       const fr = new FileReader();
  2534.       fr.onload = () => resolve(fr.result);
  2535.       fr.onerror = reject;
  2536.       fr.readAsDataURL(blob);
  2537.     });
  2538.   },
  2539.  
  2540.   guessMimeType({responseHeaders, finalUrl}) {
  2541.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2542.         !RegExp.$1.includes('text/plain'))
  2543.       return RegExp.$1;
  2544.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2545.     switch (ext.toLowerCase()) {
  2546.       case 'bmp': return 'image/bmp';
  2547.       case 'gif': return 'image/gif';
  2548.       case 'jpe': return 'image/jpeg';
  2549.       case 'jpeg': return 'image/jpeg';
  2550.       case 'jpg': return 'image/jpeg';
  2551.       case 'mp4': return 'video/mp4';
  2552.       case 'png': return 'image/png';
  2553.       case 'svg': return 'image/svg+xml';
  2554.       case 'tif': return 'image/tiff';
  2555.       case 'tiff': return 'image/tiff';
  2556.       case 'webm': return 'video/webm';
  2557.       default: return 'application/octet-stream';
  2558.     }
  2559.   },
  2560.  
  2561.   findImageUrl(n, url) {
  2562.     if (!n) return;
  2563.     let html;
  2564.     const path =
  2565.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2566.       n.getAttribute('src') ||
  2567.       n.getAttribute('data-m4v') ||
  2568.       n.getAttribute('href') ||
  2569.       n.getAttribute('content') ||
  2570.       (html = n.outerHTML).includes('http') &&
  2571.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2572.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2573.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2574.   },
  2575. };
  2576.  
  2577. const Status = {
  2578.  
  2579.   set(status) {
  2580.     if (!status && !cfg.globalStatus) {
  2581.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2582.       return;
  2583.     }
  2584.     const prefix = cfg.globalStatus ? PREFIX : '';
  2585.     const action = status && /^[+-]/.test(status) && status[0];
  2586.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2587.     const el = cfg.globalStatus ? doc.documentElement :
  2588.       name === 'edge' ? ai.popup :
  2589.         ai.node;
  2590.     if (!el) return;
  2591.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2592.     const oldValue = (el.getAttribute(attr) || '').trim();
  2593.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2594.     switch (action) {
  2595.       case '-':
  2596.         cls.delete(name);
  2597.         break;
  2598.       case false:
  2599.         for (const c of cls)
  2600.           if (c.startsWith(prefix) && c !== name)
  2601.             cls.delete(c);
  2602.       // fallthrough to +
  2603.       case '+':
  2604.         if (name)
  2605.           cls.add(name);
  2606.         break;
  2607.     }
  2608.     const newValue = [...cls].join(' ');
  2609.     if (newValue !== oldValue)
  2610.       el.setAttribute(attr, newValue);
  2611.   },
  2612.  
  2613.   loading(force) {
  2614.     if (!force) {
  2615.       clearTimeout(ai.timerStatus);
  2616.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2617.     } else if (!ai.popupLoaded) {
  2618.       Status.set('+loading');
  2619.     }
  2620.   },
  2621. };
  2622.  
  2623. const UrlMatcher = (() => {
  2624.   // string-to-regexp escaped chars
  2625.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2626.   // rx for '^' symbol in simple url match
  2627.   const RX_SEP = /[^\w%._-]/y;
  2628.   const RXS_SEP = RX_SEP.source;
  2629.   return match => {
  2630.     const results = [];
  2631.     for (const s of ensureArray(match)) {
  2632.       const pinDomain = s.startsWith('||');
  2633.       const pinStart = !pinDomain && s.startsWith('|');
  2634.       const endSep = s.endsWith('^');
  2635.       let fn;
  2636.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2637.       if (needle.includes('^')) {
  2638.         let plain = '';
  2639.         for (const part of needle.split('^'))
  2640.           if (part.length > plain.length)
  2641.             plain = part;
  2642.         const rx = new RegExp(
  2643.           (pinStart ? '^' : '') +
  2644.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2645.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2646.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2647.         needle = [plain, rx];
  2648.         fn = regexp;
  2649.       } else if (pinStart) {
  2650.         fn = endSep ? equals : starts;
  2651.       } else if (pinDomain) {
  2652.         const slashPos = needle.indexOf('/');
  2653.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2654.         needle = [needle, domain, slashPos > 0, endSep];
  2655.         fn = startsDomainPrescreen;
  2656.       } else if (endSep) {
  2657.         fn = ends;
  2658.       } else {
  2659.         fn = has;
  2660.       }
  2661.       results.push({fn, data: needle});
  2662.     }
  2663.     return results.length > 1 ?
  2664.       {fn: checkArray, data: results} :
  2665.       results[0];
  2666.   };
  2667.   function checkArray(s) {
  2668.     return this.some(checkArrayItem, s);
  2669.   }
  2670.   function checkArrayItem(item) {
  2671.     return item.fn.call(item.data, this);
  2672.   }
  2673.   function ends(s) {
  2674.     return s.endsWith(this) || (
  2675.       s.length > this.length &&
  2676.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2677.       endsWithSep(s));
  2678.   }
  2679.   function endsWithSep(s, pos = s.length - 1) {
  2680.     RX_SEP.lastIndex = pos;
  2681.     return RX_SEP.test(s);
  2682.   }
  2683.   function equals(s) {
  2684.     return s.startsWith(this) && (
  2685.       s.length === this.length ||
  2686.       s.length === this.length + 1 && endsWithSep(s));
  2687.   }
  2688.   function has(s) {
  2689.     return s.includes(this);
  2690.   }
  2691.   function regexp(s) {
  2692.     return s.includes(this[0]) && this[1].test(s);
  2693.   }
  2694.   function starts(s) {
  2695.     return s.startsWith(this);
  2696.   }
  2697.   function startsDomainPrescreen(url) {
  2698.     return url.includes(this[0]) && startsDomain.call(this, url);
  2699.   }
  2700.   function startsDomain(url) {
  2701.     let hostStart = url.indexOf('//');
  2702.     if (hostStart && url[hostStart - 1] !== ':')
  2703.       return;
  2704.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2705.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2706.     const [needle, domain, pinDomainEnd, endSep] = this;
  2707.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2708.     for (; ; start++) {
  2709.       start = host.indexOf(domain, start);
  2710.       if (start < 0)
  2711.         return;
  2712.       if (!start || host[start - 1] === '.')
  2713.         break;
  2714.     }
  2715.     start += hostStart;
  2716.     if (url.lastIndexOf(needle, start) !== start)
  2717.       return;
  2718.     const end = start + needle.length;
  2719.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2720.   }
  2721. })();
  2722.  
  2723. const Util = {
  2724.  
  2725.   addStyle(name, css) {
  2726.     const id = `${PREFIX}style:${name}`;
  2727.     const el = doc.getElementById(id) ||
  2728.                css && $create('style', {id});
  2729.     if (!el) return;
  2730.     if (el.textContent !== css)
  2731.       el.textContent = css;
  2732.     if (el.parentElement !== doc.head)
  2733.       doc.head.appendChild(el);
  2734.     return el;
  2735.   },
  2736.  
  2737.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2738.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2739.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2740.   },
  2741.  
  2742.   decodeHtmlEntities(s) {
  2743.     return s
  2744.       .replace(/&quot;/g, '"')
  2745.       .replace(/&apos;/g, '\'')
  2746.       .replace(/&lt;/g, '<')
  2747.       .replace(/&gt;/g, '>')
  2748.       .replace(/&amp;/g, '&');
  2749.   },
  2750.  
  2751.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2752.   decodeUrl(url) {
  2753.     if (!url || typeof url !== 'string') return url;
  2754.     const iPct = url.indexOf('%');
  2755.     const iColon = url.indexOf(':');
  2756.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2757.       decodeURIComponent(url) :
  2758.       url;
  2759.   },
  2760.  
  2761.   deepEqual(a, b) {
  2762.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2763.       return a === b;
  2764.     if (Array.isArray(a)) {
  2765.       return Array.isArray(b) &&
  2766.         a.length === b.length &&
  2767.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2768.     }
  2769.     const keys = Object.keys(a);
  2770.     return keys.length === Object.keys(b).length &&
  2771.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2772.   },
  2773.  
  2774.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2775.  
  2776.   forceLayout(node) {
  2777.     // eslint-disable-next-line no-unused-expressions
  2778.     node.clientHeight;
  2779.   },
  2780.  
  2781.   formatError(e, rule) {
  2782.     const message =
  2783.       e.message ||
  2784.       e.readyState && 'Request failed.' ||
  2785.       e.type === 'error' && `File can't be displayed.${
  2786.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2787.       }` ||
  2788.       e;
  2789.     const m = [
  2790.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2791.       ['', 'font-weight:normal'],
  2792.     ];
  2793.     m.push(...[
  2794.       ['Node: %o', ai.node],
  2795.       ['Rule: %o', rule],
  2796.       ai.url && ['URL: %s', ai.url],
  2797.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2798.     ].filter(Boolean));
  2799.     return {
  2800.       message,
  2801.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2802.       consoleArgs: m.map(([, v]) => v),
  2803.     };
  2804.   },
  2805.  
  2806.   isHovered(el) {
  2807.     // doesn't work in image tabs, browser bug?
  2808.     return App.isImageTab || el.closest(':hover');
  2809.   },
  2810.  
  2811.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2812.  
  2813.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2814.  
  2815.   newFunction(...args) {
  2816.     try {
  2817.       return App.NOP || new Function(...args);
  2818.     } catch (e) {
  2819.       if (!RX_EVAL_BLOCKED.test(e.message))
  2820.         throw e;
  2821.       App.NOP = () => {};
  2822.       return App.NOP;
  2823.     }
  2824.   },
  2825.  
  2826.   rel2abs(rel, abs = location.href) {
  2827.     try {
  2828.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2829.         new URL(rel, abs).href;
  2830.     } catch (e) {
  2831.       return rel;
  2832.     }
  2833.   },
  2834.  
  2835.   stringify(...args) {
  2836.     const p = Array.prototype;
  2837.     const {toJSON} = p;
  2838.     if (toJSON) p.toJSON = null;
  2839.     const res = JSON.stringify(...args);
  2840.     if (toJSON) p.toJSON = toJSON;
  2841.     return res;
  2842.   },
  2843.  
  2844.   suppressTooltip() {
  2845.     for (const node of [
  2846.       ai.node.parentNode,
  2847.       ai.node,
  2848.       ai.node.firstElementChild,
  2849.     ]) {
  2850.       const t = (node || 0).title;
  2851.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2852.         ai.tooltip = {node, text: t};
  2853.         node.title = '';
  2854.         break;
  2855.       }
  2856.     }
  2857.   },
  2858.  
  2859.   tabFixUrl() {
  2860.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2861.            navigator.userAgent.includes('Gecko/') &&
  2862.            flattenHtml(`data:text/html;charset=utf8,
  2863.       <style>
  2864.         body {
  2865.           margin: 0;
  2866.           padding: 0;
  2867.           background: #222;
  2868.         }
  2869.         .fit {
  2870.           overflow: hidden
  2871.         }
  2872.         .fit > img {
  2873.           max-width: 100vw;
  2874.           max-height: 100vh;
  2875.         }
  2876.         body > img {
  2877.           margin: auto;
  2878.           position: absolute;
  2879.           left: 0;
  2880.           right: 0;
  2881.           top: 0;
  2882.           bottom: 0;
  2883.         }
  2884.       </style>
  2885.       <body class=fit>
  2886.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2887.       </body>
  2888.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2889.   },
  2890. };
  2891.  
  2892. async function setup({rule} = {}) {
  2893.   if (!isFunction(doc.body.attachShadow)) {
  2894.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2895.           'You can edit the script\'s storage directly in your userscript manager.');
  2896.     return;
  2897.   }
  2898.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2899.   let uiCfg;
  2900.   let root = (elConfig || 0).shadowRoot;
  2901.   let {blankRuleElement} = setup;
  2902.   /** @type NodeList */
  2903.   const UI = new Proxy({}, {
  2904.     get(_, id) {
  2905.       return root.getElementById(id);
  2906.     },
  2907.   });
  2908.   if (!rule || !elConfig)
  2909.     init(await Config.load({save: true}));
  2910.   if (rule)
  2911.     installRule(rule);
  2912.  
  2913.   function init(data) {
  2914.     uiCfg = data;
  2915.     $remove(elConfig);
  2916.     elConfig = $create('div', {contentEditable: true});
  2917.     root = elConfig.attachShadow({mode: 'open'});
  2918.     root.innerHTML = TRUSTED.createHTML(createConfigHtml());
  2919.     initEvents();
  2920.     renderAll();
  2921.     renderCustomScales();
  2922.     renderRules();
  2923.     doc.body.appendChild(elConfig);
  2924.     requestAnimationFrame(() => {
  2925.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2926.     });
  2927.   }
  2928.  
  2929.   function initEvents() {
  2930.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2931.     UI._export.onclick = e => {
  2932.       dropEvent(e);
  2933.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2934.       UI._exportNotification.hidden = false;
  2935.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2936.     };
  2937.     UI._import.onclick = e => {
  2938.       dropEvent(e);
  2939.       const s = prompt('Paste settings:');
  2940.       if (s)
  2941.         init(new Config({data: s}));
  2942.     };
  2943.     UI._install.onclick = setupRuleInstaller;
  2944.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2945.     UI._reveal.onclick = e => {
  2946.       e.preventDefault();
  2947.       cssApp.hidden = !cssApp.hidden;
  2948.       if (!cssApp.hidden) {
  2949.         if (!cssApp.value) {
  2950.           App.updateStyles();
  2951.           cssApp.value = App.globalStyle.trim();
  2952.           cssApp.setSelectionRange(0, 0);
  2953.         }
  2954.         cssApp.focus();
  2955.       }
  2956.     };
  2957.     UI.start.onchange = function () {
  2958.       UI.delay.closest('label').hidden =
  2959.         UI.preload.closest('label').hidden =
  2960.           this.value !== 'auto';
  2961.     };
  2962.     UI.start.onchange();
  2963.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2964.     // color
  2965.     for (const el of $$('[type="color"]', root)) {
  2966.       el.oninput = colorOnInput;
  2967.       el.elSwatch = el.nextElementSibling;
  2968.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2969.       el.elOpacity.elColor = el;
  2970.     }
  2971.     function colorOnInput() {
  2972.       this.elSwatch.style.setProperty('--color',
  2973.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2974.     }
  2975.     // range
  2976.     for (const el of $$('[type="range"]', root)) {
  2977.       el.oninput = rangeOnInput;
  2978.       el.onblur = rangeOnBlur;
  2979.       el.addEventListener('focusin', rangeOnFocus);
  2980.     }
  2981.     function rangeOnBlur(e) {
  2982.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2983.         this.elEdit.onblur(e);
  2984.     }
  2985.     function rangeOnFocus() {
  2986.       if (this.elEdit) return;
  2987.       const {min, max, step, value} = this;
  2988.       this.elEdit = $create('input', {
  2989.         value, min, max, step,
  2990.         className: 'range-edit',
  2991.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2992.         type: 'number',
  2993.         elRange: this,
  2994.         onblur: rangeEditOnBlur,
  2995.         oninput: rangeEditOnInput,
  2996.       });
  2997.       this.insertAdjacentElement('afterend', this.elEdit);
  2998.     }
  2999.     function rangeOnInput() {
  3000.       this.title = (this.dataset.title || '').replace('$', this.value);
  3001.       if (this.elColor) this.elColor.oninput();
  3002.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3003.     }
  3004.     // range-edit
  3005.     function rangeEditOnBlur(e) {
  3006.       if (e.relatedTarget !== this.elRange) {
  3007.         this.remove();
  3008.         this.elRange.elEdit = null;
  3009.       }
  3010.     }
  3011.     function rangeEditOnInput() {
  3012.       this.elRange.valueAsNumber = this.valueAsNumber;
  3013.       this.elRange.oninput();
  3014.     }
  3015.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3016.     // which may happen since it sees only the outer <div> in the event |target|
  3017.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3018.   }
  3019.  
  3020.   function closeSetup(event) {
  3021.     const isApply = this.id === '_apply';
  3022.     if (event && (this.id === '_ok' || isApply)) {
  3023.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3024.       Ruler.init();
  3025.       Menu.reRegisterAlt();
  3026.       if (isApply) {
  3027.         renderCustomScales();
  3028.         UI._css.textContent = cfg._getCss();
  3029.         return;
  3030.       }
  3031.     }
  3032.     $remove(elConfig);
  3033.     elConfig = null;
  3034.   }
  3035.  
  3036.   function collectConfig({save, clone} = {}) {
  3037.     let data = {};
  3038.     for (const el of $$('input[id], select[id]', root))
  3039.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3040.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3041.           el.value || '';
  3042.     Object.assign(data, {
  3043.       css: UI.css.value.trim(),
  3044.       delay: UI.delay.valueAsNumber * 1000,
  3045.       hosts: collectRules(),
  3046.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3047.       scales: UI.scales.value
  3048.         .trim()
  3049.         .split(/[,;]*\s+/)
  3050.         .map(x => x.replace(',', '.'))
  3051.         .filter(x => !isNaN(parseFloat(x))),
  3052.     });
  3053.     if (clone)
  3054.       data = JSON.parse(Util.stringify(data));
  3055.     return new Config({data, save});
  3056.   }
  3057.  
  3058.   function collectRules() {
  3059.     return [...UI._rules.children]
  3060.       .map(el => [el.value.trim(), el[RULE]])
  3061.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3062.       .map(([s, json]) => json || s)
  3063.       .filter(Boolean);
  3064.   }
  3065.  
  3066.   function checkRule({target: el}) {
  3067.     let json, error, title;
  3068.     const prev = el.previousElementSibling;
  3069.     if (el.value) {
  3070.       json = Ruler.parse(el.value);
  3071.       error = json instanceof Error && (json.message || String(json));
  3072.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3073.         !/^[-.a-z0-9]*$/i.test(json.d);
  3074.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3075.         .filter(Boolean).join('\n');
  3076.       el.classList.toggle('invalid-domain', invalidDomain);
  3077.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3078.       if (!prev)
  3079.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3080.     } else if (prev) {
  3081.       prev.focus();
  3082.       el.remove();
  3083.     }
  3084.     el[RULE] = !error && json;
  3085.     el.title = title;
  3086.     el.setCustomValidity(error || '');
  3087.   }
  3088.  
  3089.   async function focusRule({target: el, relatedTarget: from}) {
  3090.     if (el === this)
  3091.       return;
  3092.     await new Promise(setTimeout);
  3093.     if (el[RULE] && el.rows < 2) {
  3094.       let i = el.selectionStart;
  3095.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3096.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3097.       el.setSelectionRange(i, i);
  3098.       el.rows = txt.match(/^/gm).length;
  3099.     }
  3100.     if (!this.contains(from))
  3101.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3102.   }
  3103.  
  3104.   function installRule(rule) {
  3105.     const inputs = UI._rules.children;
  3106.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3107.     if (!el) {
  3108.       el = inputs[0];
  3109.       el[RULE] = rule;
  3110.       el.value = Ruler.format(rule);
  3111.       el.hidden = false;
  3112.       const i = Math.max(0, collectRules().indexOf(rule));
  3113.       inputs[i].insertAdjacentElement('afterend', el);
  3114.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3115.     }
  3116.     const rect = el.getBoundingClientRect();
  3117.     if (rect.bottom < 0 ||
  3118.         rect.bottom > el.parentNode.offsetHeight)
  3119.       el.scrollIntoView();
  3120.     el.classList.add('highlight');
  3121.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3122.     el.focus();
  3123.   }
  3124.  
  3125.   function renderRules() {
  3126.     const rules = UI._rules;
  3127.     rules.addEventListener('input', checkRule);
  3128.     rules.addEventListener('focusin', focusRule);
  3129.     rules.addEventListener('paste', focusRule);
  3130.     blankRuleElement =
  3131.       setup.blankRuleElement =
  3132.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3133.     for (const rule of uiCfg.hosts || []) {
  3134.       const el = blankRuleElement.cloneNode();
  3135.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3136.       rules.appendChild(el);
  3137.       checkRule({target: el});
  3138.     }
  3139.     const search = UI._search;
  3140.     search.oninput = () => {
  3141.       setup.search = search.value;
  3142.       const s = search.value.toLowerCase();
  3143.       for (const el of rules.children)
  3144.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3145.     };
  3146.     search.value = setup.search || '';
  3147.     if (search.value)
  3148.       search.oninput();
  3149.   }
  3150.  
  3151.   function renderCustomScales() {
  3152.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3153.   }
  3154.  
  3155.   function renderAll() {
  3156.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3157.       if (el.id in uiCfg)
  3158.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3159.     for (const el of $$('input[type="range"]', root))
  3160.       el.oninput();
  3161.     for (const el of $$('a[href^="http"]', root))
  3162.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3163.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3164.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3165.   }
  3166. }
  3167.  
  3168. function setupClickedRule(event) {
  3169.   let rule;
  3170.   const el = event.target.closest('blockquote, code, pre');
  3171.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3172.     dropEvent(event);
  3173.     setup({rule});
  3174.   }
  3175. }
  3176.  
  3177. async function setupRuleInstaller(e) {
  3178.   dropEvent(e);
  3179.   const parent = this.parentElement;
  3180.   parent.children._installLoading.hidden = false;
  3181.   this.remove();
  3182.   let rules;
  3183.  
  3184.   try {
  3185.     rules = extractRules(await Remoting.getDoc(this.href));
  3186.     const selector = $create('select', {
  3187.       size: 8,
  3188.       style: 'width: 100%',
  3189.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3190.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3191.     });
  3192.     selector.append(...rules.map(renderRule));
  3193.     selector.selectedIndex = findMatchingRuleIndex();
  3194.     parent.children._installLoading.remove();
  3195.     parent.children._installHint.hidden = false;
  3196.     parent.appendChild(selector);
  3197.     requestAnimationFrame(() => {
  3198.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3199.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3200.       selector.focus();
  3201.     });
  3202.   } catch (e) {
  3203.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3204.   }
  3205.  
  3206.   function extractRules({doc}) {
  3207.     // sort by name
  3208.     return [...$$('#wiki-body tr', doc)]
  3209.       .map(tr => [
  3210.         tr.cells[0].textContent.trim(),
  3211.         Ruler.fromElement(tr.cells[1]),
  3212.       ])
  3213.       .filter(([name, r]) =>
  3214.         name && r && (!r.d || hostname.includes(r.d)))
  3215.       .sort(([a], [b]) =>
  3216.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3217.           a > b ? 1 :
  3218.             0);
  3219.   }
  3220.  
  3221.   function findMatchingRuleIndex() {
  3222.     const dottedHost = `.${hostname}.`;
  3223.     let maxCount = 0, maxIndex = 0, index = 0;
  3224.     for (const [name, {d}] of rules) {
  3225.       let count = !!(d && hostname.includes(d)) * 10;
  3226.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3227.         count += dottedHost.includes(`.${part}.`) && part.length;
  3228.       if (count > maxCount) {
  3229.         maxCount = count;
  3230.         maxIndex = index;
  3231.       }
  3232.       index++;
  3233.     }
  3234.     return maxIndex;
  3235.   }
  3236.  
  3237.   function renderRule([name, rule]) {
  3238.     return $create('option', {
  3239.       textContent: name,
  3240.       title: Ruler.format(rule, {expand: true})
  3241.         .replace(/^{|\s*}$/g, '')
  3242.         .split('\n')
  3243.         .slice(0, 12)
  3244.         .map(renderTitleLine)
  3245.         .filter(Boolean)
  3246.         .join('\n'),
  3247.     });
  3248.   }
  3249.  
  3250.   function renderTitleLine(line, i, arr) {
  3251.     return (
  3252.       // show ... on 10th line if there are more lines
  3253.       i === 9 && arr.length > 10 ? '...' :
  3254.         i > 10 ? '' :
  3255.           // truncate to 100 chars
  3256.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3257.             // strip the leading space
  3258.             .replace(/^\s/, ''));
  3259.   }
  3260.  
  3261.   function maybeSetup(e) {
  3262.     if (!eventModifiers(e))
  3263.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3264.   }
  3265. }
  3266.  
  3267. function createConfigHtml() {
  3268.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3269.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3270.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3271.   return flattenHtml(`
  3272. <style>
  3273.   :host {
  3274.     all: initial !important;
  3275.     position: fixed !important;
  3276.     z-index: 2147483647 !important;
  3277.     top: 20px !important;
  3278.     right: 20px !important;
  3279.     padding: 1.5em !important;
  3280.     color: #000 !important;
  3281.     background: #eee !important;
  3282.     box-shadow: 5px 5px 25px 2px #000 !important;
  3283.     width: 33em !important;
  3284.     border: 1px solid black !important;
  3285.     display: flex !important;
  3286.     flex-direction: column !important;
  3287.   }
  3288.   main {
  3289.     font: 12px/15px sans-serif;
  3290.   }
  3291.   table {
  3292.     text-align:left;
  3293.   }
  3294.   ul {
  3295.     max-height: calc(100vh - 200px);
  3296.     margin: 0 0 15px 0;
  3297.     padding: 0;
  3298.     list-style: none;
  3299.   }
  3300.   li {
  3301.     margin: 0;
  3302.     padding: .25em 0;
  3303.   }
  3304.   li.options {
  3305.     display: flex;
  3306.     align-items: center;
  3307.     justify-content: space-between;
  3308.   }
  3309.   li.row {
  3310.     align-items: start;
  3311.     flex-wrap: wrap;
  3312.   }
  3313.   li.row label {
  3314.     display: flex;
  3315.     flex-direction: row;
  3316.     align-items: center;
  3317.   }
  3318.   li.row input {
  3319.     margin-right: .25em;
  3320.   }
  3321.   li.stretch label {
  3322.     flex: 1;
  3323.     white-space: nowrap;
  3324.   }
  3325.   li.stretch label > span {
  3326.     display: flex;
  3327.     flex-direction: row;
  3328.     flex: 1;
  3329.   }
  3330.   label {
  3331.     display: inline-flex;
  3332.     flex-direction: column;
  3333.   }
  3334.   label:not(:last-child) {
  3335.     margin-right: 1em;
  3336.   }
  3337.   input, select {
  3338.     min-height: 1.3em;
  3339.     box-sizing: border-box;
  3340.   }
  3341.   input[type=checkbox] {
  3342.     margin-left: 0;
  3343.   }
  3344.   input[type=number] {
  3345.     width: 4em;
  3346.   }
  3347.   input:not([type=checkbox])  {
  3348.     padding: 0 .25em;
  3349.   }
  3350.   input[type=range] {
  3351.     flex: 1;
  3352.     width: 100%;
  3353.     margin: 0 .25em;
  3354.     padding: 0;
  3355.     filter: saturate(0);
  3356.     opacity: .5;
  3357.   }
  3358.   u + input[type=range] {
  3359.     max-width: 3em;
  3360.   }
  3361.   input[type=range]:hover {
  3362.     filter: none;
  3363.     opacity: 1;
  3364.   }
  3365.   input[type=color] {
  3366.     position: absolute;
  3367.     width: calc(1.5em + 2px);
  3368.     opacity: 0;
  3369.     cursor: pointer;
  3370.   }
  3371.   u {
  3372.     position: relative;
  3373.     flex: 0 0 1.5em;
  3374.     height: 1.5em;
  3375.     border: 1px solid #888;
  3376.     pointer-events: none;
  3377.     color: #888;
  3378.     background-image:
  3379.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3380.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3381.     background-size: .5em .5em;
  3382.     background-position: 0 0, .25em .25em;
  3383.   }
  3384.   u::after {
  3385.     position: absolute;
  3386.     top: 0;
  3387.     left: 0;
  3388.     right: 0;
  3389.     bottom: 0;
  3390.     content: "";
  3391.     background-color: var(--color);
  3392.   }
  3393.   .range-edit {
  3394.     position: absolute;
  3395.     box-shadow: 0 0.25em 1em #000;
  3396.     z-index: 99;
  3397.   }
  3398.   textarea {
  3399.     resize: vertical;
  3400.     margin: 1px 0;
  3401.     font: 11px/1.25 Consolas, monospace;
  3402.   }
  3403.   :invalid {
  3404.     background-color: #f002;
  3405.     border-color: #800;
  3406.   }
  3407.   code {
  3408.     font-weight: bold;
  3409.   }
  3410.   a {
  3411.     text-decoration: none;
  3412.     color: LinkText;
  3413.   }
  3414.   a:hover {
  3415.     text-decoration: underline;
  3416.   }
  3417.   button {
  3418.     padding: .2em 1em;
  3419.     margin: 0 1em;
  3420.   }
  3421.   kbd {
  3422.     padding: 1px 6px;
  3423.     font-weight: bold;
  3424.     font-family: Consolas, monospace;
  3425.     border: 1px solid #888;
  3426.     border-radius: 3px;
  3427.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3428.   }
  3429.   .column {
  3430.     display: flex;
  3431.     flex-direction: column;
  3432.   }
  3433.   .highlight {
  3434.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3435.     animation-fill-mode: both;
  3436.   }
  3437.   #_rules > * {
  3438.     word-break: break-all;
  3439.   }
  3440.   #_rules > :not(:focus) {
  3441.     overflow: hidden; /* prevents wrapping in FF */
  3442.   }
  3443.   .invalid-domain {
  3444.     opacity: .5;
  3445.   }
  3446.   .matching-domain {
  3447.     border-color: #56b8ff;
  3448.     background: #d7eaff;
  3449.   }
  3450.   #_x {
  3451.     position: absolute;
  3452.     top: 0;
  3453.     right: 0;
  3454.     padding: 4px 8px;
  3455.     cursor: pointer;
  3456.     user-select: none;
  3457.   }
  3458.   #_x:hover {
  3459.     background-color: #8884;
  3460.   }
  3461.   #_cssApp {
  3462.     color: seagreen;
  3463.   }
  3464.   #_exportNotification {
  3465.     color: green;
  3466.     font-weight: bold;
  3467.     position: absolute;
  3468.     left: 0;
  3469.     right: 0;
  3470.     bottom: 2px;
  3471.   }
  3472.   #_installHint {
  3473.     color: green;
  3474.   }
  3475.   @keyframes fade-in {
  3476.     from { background-color: deepskyblue }
  3477.     to {}
  3478.   }
  3479.   @media (prefers-color-scheme: dark) {
  3480.     :host {
  3481.       color: #aaa !important;
  3482.       background: #333 !important;
  3483.     }
  3484.     a {
  3485.       color: deepskyblue;
  3486.     }
  3487.     button {
  3488.       background: linear-gradient(-5deg, #333, #555);
  3489.       border: 1px solid #000;
  3490.       box-shadow: 0 2px 6px #181818;
  3491.       border-radius: 3px;
  3492.       cursor: pointer;
  3493.     }
  3494.     button:hover {
  3495.       background: linear-gradient(-5deg, #333, #666);
  3496.     }
  3497.     textarea, input, select {
  3498.       background: #111;
  3499.       color: #BBB;
  3500.       border: 1px solid #555;
  3501.     }
  3502.     input[type=checkbox] {
  3503.       filter: invert(1);
  3504.     }
  3505.     input[type=range] {
  3506.       filter: invert(1) saturate(0);
  3507.     }
  3508.     input[type=range]:hover {
  3509.       filter: invert(1);
  3510.     }
  3511.     kbd {
  3512.       border-color: #666;
  3513.     }
  3514.     @supports (-moz-appearance: none) {
  3515.       input[type=checkbox],
  3516.       input[type=range],
  3517.       input[type=range]:hover {
  3518.         filter: none;
  3519.       }
  3520.     }
  3521.     .range-edit {
  3522.       box-shadow: 0 .5em 1em .5em #000;
  3523.     }
  3524.     .matching-domain {
  3525.       border-color: #0065af;
  3526.       background: #032b58;
  3527.       color: #ddd;
  3528.     }
  3529.     #_cssApp {
  3530.       color: darkseagreen;
  3531.     }
  3532.     #_installHint {
  3533.       color: greenyellow;
  3534.     }
  3535.     ::-webkit-scrollbar {
  3536.       width: 14px;
  3537.       height: 14px;
  3538.       background: #333;
  3539.     }
  3540.     ::-webkit-scrollbar-button:single-button {
  3541.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3542.     }
  3543.     ::-webkit-scrollbar-track-piece {
  3544.       background: #444;
  3545.       border: 4px solid #333;
  3546.       border-radius: 8px;
  3547.     }
  3548.     ::-webkit-scrollbar-thumb {
  3549.       border: 3px solid #333;
  3550.       border-radius: 8px;
  3551.       background: #666;
  3552.     }
  3553.     ::-webkit-resizer {
  3554.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3555.       border: 2px solid transparent;
  3556.     }
  3557.   }
  3558. </style>
  3559. <style id="_css">${cfg._getCss()}</style>
  3560. <main id="${PREFIX}setup">
  3561.   <div id=_x>x</div>
  3562.   <ul class=column>
  3563.     <details style="margin: -1em 0 0">
  3564.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3565.       <table>
  3566.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3567.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3568.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3569.         <tr><th>Force-activate<br>(for small pics)</th>
  3570.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3571.         <tr><td>&nbsp;</td></tr>
  3572.         <tr><th>Start zooming</th>
  3573.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3574.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3575.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3576.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3577.         <tr><th>Previous/next<br>in album</th>
  3578.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3579.         <tr><td>&nbsp;</td></tr>
  3580.       </table>
  3581.       <table>
  3582.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3583.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3584.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3585.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3586.       </table>
  3587.     </details>
  3588.     <li class="options stretch">
  3589.       <label>Popup shows on
  3590.         <select id=start>
  3591.           <option value=context>Right-click / &#8801; / Ctrl
  3592.           <option value=contextMK>Right-click / &#8801;
  3593.           <option value=contextM>Right-click
  3594.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3595.           <option value=ctrl>Ctrl
  3596.           <option value=auto>automatically
  3597.         </select>
  3598.       </label>
  3599.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3600.       <label title="(if the full version of the hovered image is ...% larger)">
  3601.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3602.       </label>
  3603.       <label>Zoom activates on
  3604.         <select id=zoom>
  3605.           <option value=context>Right click / Shift
  3606.           <option value=wheel>Wheel up / Shift
  3607.           <option value=shift>Shift
  3608.           <option value=auto>automatically
  3609.         </select>
  3610.       </label>
  3611.       <label>...and zooms to
  3612.         <select id=fit>
  3613.           <option value=all>fit to window
  3614.           <option value=large>fit if larger
  3615.           <option value=no>100%
  3616.           <option value="" title="Use custom scale factors">custom
  3617.         </select>
  3618.       </label>
  3619.     </li>
  3620.     <li class=options>
  3621.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3622.       </label>
  3623.       <label>When fully zoomed out:
  3624.         <select id=zoomOut>
  3625.           <option value=stay>stay in zoom mode
  3626.           <option value=auto>stay if still hovered
  3627.           <option value=unzoom>undo zoom mode
  3628.           <option value=close>close popup
  3629.         </select>
  3630.       </label>
  3631.       <label style="flex: 1" title="${trimLeft(`
  3632.         Scale factors to use when “zooms to” selector is set to “custom”.
  3633.         0 = fit to window,
  3634.         0! = same as 0 but also removes smaller values,
  3635.         * after a value marks the default zoom factor, for example: 1*
  3636.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3637.         ${scalesHint}
  3638.       `)}">Custom scale factors:
  3639.         <input id=scales placeholder="${scalesHint}">
  3640.       </label>
  3641.     </li>
  3642.     <li class="options row">
  3643.       <div>
  3644.         <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3645.           <input type=checkbox id=center>Centered*</label>
  3646.         <label title="Provides smoother experience but increases network traffic">
  3647.           <input type=checkbox id=preload>Preload on hover*</label>
  3648.         <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3649.       </div>
  3650.       <div>
  3651.         <label><input type=checkbox id=mute>Mute videos</label>
  3652.         <label title="Disable only if you spoof the HTTP headers yourself">
  3653.           <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3654.         <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3655.           <input type=checkbox id=globalStatus>Set status on &lt;html&gt;*</label>
  3656.       </div>
  3657.       <div>
  3658.         <label title="...or show a partial image while still loading">
  3659.           <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3660.         <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3661.         <label><input type=checkbox id=uiFadeinGallery>Fade-in transition in gallery</label>
  3662.       </div>
  3663.       <label><input type=checkbox id=startAltShown>
  3664.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3665.     </li>
  3666.     <li class="options stretch">
  3667.       <label>Background
  3668.         <span>
  3669.           <input id=uiBackgroundColor type=color><u></u>
  3670.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3671.         </span>
  3672.       </label>
  3673.       <label>Border color, opacity, size
  3674.         <span>
  3675.           <input id=uiBorderColor type=color><u></u>
  3676.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3677.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3678.         </span>
  3679.       </label>
  3680.       <label>Shadow color, opacity, size
  3681.         <span>
  3682.           <input id=uiShadowColor type=color><u></u>
  3683.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3684.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3685.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3686.         </span>
  3687.       </label>
  3688.       <label>Padding
  3689.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3690.       </label>
  3691.       <label>Margin
  3692.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3693.       </label>
  3694.     </li>
  3695.     <li>
  3696.       <a href="${MPIV_BASE_URL}Custom-CSS" target="_blank">Custom CSS:</a>&nbsp;
  3697.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3698.       <a tabindex=0 id=_reveal style="float: right"
  3699.          title="You can copy parts of it to override them in your custom CSS">
  3700.          View the built-in CSS</a>
  3701.       <div class=column>
  3702.         <textarea id=css spellcheck=false></textarea>
  3703.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3704.       </div>
  3705.     </li>
  3706.     <li style="display: flex; justify-content: space-between;">
  3707.       <div><a href="${MPIV_BASE_URL}Custom-host-rules" target="_blank">Custom host rules:</a></div>
  3708.       <div style="white-space: nowrap">
  3709.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3710.         in "d" value, for example <code>"d": "!foo.com"</code>
  3711.       </div>
  3712.       <div>
  3713.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3714.       </div>
  3715.     </li>
  3716.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3717.       <div id=_rules class=column>
  3718.         <textarea rows=1 spellcheck=false></textarea>
  3719.       </div>
  3720.     </li>
  3721.     <li>
  3722.       <div hidden id=_installLoading>Loading...</div>
  3723.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3724.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3725.       <a href="${MPIV_BASE_URL}Rules" id=_install target="_blank">Install rule from repository...</a>
  3726.     </li>
  3727.   </ul>
  3728.   <div style="text-align:center">
  3729.     <button id=_ok accesskey=s>OK</button>
  3730.     <button id=_apply accesskey=a>Apply</button>
  3731.     <button id=_import style="margin-right: 0">Import</button>
  3732.     <button id=_export style="margin-left: 0">Export</button>
  3733.     <button id=_cancel>Cancel</button>
  3734.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3735.   </div>
  3736. </main>`);
  3737. }
  3738.  
  3739. function createGlobalStyle() {
  3740.   App.globalStyle = /*language=CSS*/ (String.raw`
  3741. #\mpiv-bar {
  3742.   position: fixed;
  3743.   z-index: 2147483647;
  3744.   top: 0;
  3745.   left: 0;
  3746.   right: 0;
  3747.   opacity: 0;
  3748.   transition: opacity 1s ease .25s;
  3749.   text-align: center;
  3750.   font-family: sans-serif;
  3751.   font-size: 15px;
  3752.   font-weight: bold;
  3753.   background: #0005;
  3754.   color: white;
  3755.   padding: 4px 10px;
  3756.   text-shadow: .5px .5px 2px #000;
  3757. }
  3758. #\mpiv-bar.\mpiv-show,
  3759. #\mpiv-bar[data-force] {
  3760.   opacity: 1;
  3761. }
  3762. #\mpiv-bar[data-zoom]::after {
  3763.   content: " (" attr(data-zoom) ")";
  3764.   opacity: .8;
  3765. }
  3766. #\mpiv-popup.\mpiv-show {
  3767.   display: inline;
  3768. }
  3769. #\mpiv-popup {
  3770.   display: none;
  3771.   cursor: none;
  3772. ${cfg.uiFadein ? String.raw`
  3773.   animation: .2s \mpiv-fadein both;
  3774.   transition: box-shadow .25s, background-color .25s;
  3775.   ` : ''}
  3776. ${App.popupStyleBase = `
  3777.   border: none;
  3778.   box-sizing: border-box;
  3779.   background-size: cover;
  3780.   position: fixed;
  3781.   z-index: 2147483647;
  3782.   padding: 0;
  3783.   margin: 0;
  3784.   top: 0;
  3785.   left: 0;
  3786.   width: auto;
  3787.   height: auto;
  3788.   transform-origin: center;
  3789.   max-width: none;
  3790.   max-height: none;
  3791. `}
  3792. }
  3793. #\mpiv-popup.\mpiv-show {
  3794.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3795.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3796.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3797.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3798. }
  3799. #\mpiv-popup.\mpiv-show[loaded] {
  3800.   background-color: ${Util.color('Background')};
  3801.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3802. }
  3803. #\mpiv-popup[data-gallery-flip] {
  3804.   animation: none;
  3805.   transition: none;
  3806. }
  3807. #\mpiv-popup[data-no-aa],
  3808. #\mpiv-popup.\mpiv-zoom-max {
  3809.   image-rendering: pixelated;
  3810. }
  3811. #\mpiv-setup {
  3812. }
  3813. @keyframes \mpiv-fadein {
  3814.   from {
  3815.     opacity: 0;
  3816.     border-color: transparent;
  3817.   }
  3818.   to {
  3819.     opacity: 1;
  3820.   }
  3821. }
  3822. ` + (cfg.globalStatus ? String.raw`
  3823. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3824.   cursor: progress !important;
  3825. }
  3826. :root.\mpiv-edge #\mpiv-popup {
  3827.   cursor: default;
  3828. }
  3829. :root.\mpiv-error *:hover {
  3830.   cursor: not-allowed !important;
  3831. }
  3832. :root.\mpiv-ready *:hover,
  3833. :root.\mpiv-large *:hover {
  3834.   cursor: zoom-in !important;
  3835. }
  3836. :root.\mpiv-shift *:hover {
  3837.   cursor: default !important;
  3838. }
  3839. ` : String.raw`
  3840. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3841.   cursor: progress;
  3842. }
  3843. [\mpiv-status~="edge"]:hover {
  3844.   cursor: default;
  3845. }
  3846. [\mpiv-status~="error"]:hover {
  3847.   cursor: not-allowed;
  3848. }
  3849. [\mpiv-status~="ready"]:hover,
  3850. [\mpiv-status~="large"]:hover {
  3851.   cursor: zoom-in;
  3852. }
  3853. [\mpiv-status~="shift"]:hover {
  3854.   cursor: default;
  3855. }
  3856. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3857.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3858.   return App.globalStyle;
  3859. }
  3860.  
  3861. //#region Global utilities
  3862.  
  3863. const clamp = (v, min, max) =>
  3864.   v < min ? min : v > max ? max : v;
  3865.  
  3866. const compareNumbers = (a, b) =>
  3867.   a - b;
  3868.  
  3869. const flattenHtml = str =>
  3870.   str.trim().replace(/\n\s*/g, '');
  3871.  
  3872. const dropEvent = e =>
  3873.   (e.preventDefault(), e.stopPropagation());
  3874.  
  3875. const ensureArray = v =>
  3876.   Array.isArray(v) ? v : [v];
  3877.  
  3878. /** @param {KeyboardEvent} e */
  3879. const eventModifiers = e =>
  3880.   (e.altKey ? '!' : '') +
  3881.   (e.ctrlKey ? '^' : '') +
  3882.   (e.metaKey ? '#' : '') +
  3883.   (e.shiftKey ? '+' : '');
  3884.  
  3885. const isFunction = val => typeof val === 'function';
  3886.  
  3887. const now = performance.now.bind(performance);
  3888.  
  3889. const sumProps = (...props) => {
  3890.   let sum = 0;
  3891.   for (const p of props)
  3892.     sum += parseFloat(p) || 0;
  3893.   return sum;
  3894. };
  3895.  
  3896. const tryCatch = function (fn, ...args) {
  3897.   try {
  3898.     return fn.apply(this, args);
  3899.   } catch (e) {}
  3900. };
  3901.  
  3902. const $ = (sel, node = doc) =>
  3903.   node.querySelector(sel) || false;
  3904.  
  3905. const $$ = (sel, node = doc) =>
  3906.   node.querySelectorAll(sel);
  3907.  
  3908. const $create = (tag, props) =>
  3909.   Object.assign(doc.createElement(tag), props);
  3910.  
  3911. const $css = (el, props) =>
  3912.   Object.entries(props).forEach(([k, v]) =>
  3913.     el.style.setProperty(k, v, 'important'));
  3914.  
  3915. const $parseHtml = str =>
  3916.   new DOMParser().parseFromString(str, 'text/html');
  3917.  
  3918. const $many = (q, doc) => {
  3919.   for (const selector of ensureArray(q)) {
  3920.     const el = selector && $(selector, doc);
  3921.     if (el)
  3922.       return el;
  3923.   }
  3924. };
  3925.  
  3926. const $prop = (sel, prop, node = doc) =>
  3927.   (node = $(sel, node)) && node[prop] || '';
  3928.  
  3929. const $propUp = (node, prop) =>
  3930.   (node = node.closest(`[${prop}]`)) &&
  3931.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3932.   '';
  3933.  
  3934. const $remove = node =>
  3935.   node && node.remove();
  3936.  
  3937. //#endregion
  3938. //#region Init
  3939.  
  3940. nonce = ($('script[nonce]') || {}).nonce || '';
  3941. CspSniffer.init();
  3942.  
  3943. Config.load({save: true}).then(res => {
  3944.   cfg = res;
  3945.   if (Menu) Menu.register();
  3946.  
  3947.   if (doc.body) App.checkImageTab();
  3948.   else addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3949.  
  3950.   addEventListener('mouseover', Events.onMouseOver, true);
  3951.   addEventListener('contextmenu', Events.onContext, true);
  3952.   addEventListener('keydown', Events.onKeyDown, true);
  3953.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3954.     addEventListener('click', setupClickedRule, true);
  3955.   addEventListener('message', App.onMessage, true);
  3956. });
  3957.  
  3958. //#endregion