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Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

اعتبارا من 01-01-2022. شاهد أحدث إصدار.

  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     1.2.19
  27. // @author      tophf
  28. //
  29. // @original-version 2017.9.29
  30. // @original-author  kuehlschrank
  31. //
  32. // @connect     *
  33. // CSP check:
  34. // @connect     self
  35. // rule installer in config dialog:
  36. // @connect     github.com
  37. // big/trusted hostings for the built-in rules with "q":
  38. // @connect     deviantart.com
  39. // @connect     facebook.com
  40. // @connect     fbcdn.com
  41. // @connect     flickr.com
  42. // @connect     gfycat.com
  43. // @connect     googleusercontent.com
  44. // @connect     gyazo.com
  45. // @connect     imgur.com
  46. // @connect     instagr.am
  47. // @connect     instagram.com
  48. // @connect     prnt.sc
  49. // @connect     prntscr.com
  50. // @connect     user-images.githubusercontent.com
  51. //
  52. // @supportURL  https://github.com/tophf/mpiv/issues
  53. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  54. // ==/UserScript==
  55.  
  56. 'use strict';
  57.  
  58. //#region Globals
  59.  
  60. /** @type mpiv.Config */
  61. let cfg;
  62. /** @type mpiv.AppInfo */
  63. let ai = {rule: {}};
  64. /** @type Element */
  65. let elConfig;
  66. let nonce;
  67.  
  68. const doc = document;
  69. const hostname = location.hostname;
  70. const dotDomain = '.' + hostname;
  71. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  72. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75.  
  76. const PREFIX = 'mpiv-';
  77. const STATUS_ATTR = `${PREFIX}status`;
  78. const MSG = Object.assign({}, ...[
  79.   'getViewSize',
  80.   'viewSize',
  81. ].map(k => ({[k]: `${PREFIX}${k}`})));
  82. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  83. // time for volatile things to settle down meanwhile we postpone action
  84. // examples: loading image from cache, quickly moving mouse over one element to another
  85. const SETTLE_TIME = 50;
  86. // used to detect JS code in host rules
  87. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  88. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  89. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  90. const ZOOM_MAX = 16;
  91. const SYM_U = Symbol('u');
  92. const TRUSTED = (({trustedTypes}, policy) =>
  93.   trustedTypes ? trustedTypes.createPolicy('mpiv', policy) : policy
  94. )(window, {
  95.   createHTML: str => str,
  96.   createScript: str => str,
  97. });
  98. const FN_ARGS = {
  99.   s: ['m', 'node', 'rule'],
  100.   c: ['text', 'doc', 'node', 'rule'],
  101.   q: ['text', 'doc', 'node', 'rule'],
  102.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  103. };
  104. //#endregion
  105. //#region GM4 polyfill
  106.  
  107. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  108.   this.GM = {info: GM_info};
  109. if (!GM.getValue)
  110.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  111. if (!GM.setValue)
  112.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  113. if (!GM.openInTab)
  114.   GM.openInTab = GM_openInTab;
  115. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  116.   GM.registerMenuCommand = GM_registerMenuCommand;
  117. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  118.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  119. if (!GM.setClipboard)
  120.   GM.setClipboard = GM_setClipboard;
  121. if (!GM.xmlHttpRequest)
  122.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  123.  
  124. //#endregion
  125.  
  126. const App = {
  127.  
  128.   isEnabled: true,
  129.   isImageTab: false,
  130.   globalStyle: '',
  131.   popupStyleBase: '',
  132.  
  133.   activate(info, event) {
  134.     const {match, node, rule, url} = info;
  135.     if (elConfig) console.info({node, rule, url, match});
  136.     if (ai.node) App.deactivate();
  137.     ai = info;
  138.     ai.force = event.ctrlKey;
  139.     ai.gNum = 0;
  140.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  141.     Util.suppressTooltip();
  142.     Calc.updateViewSize();
  143.     Events.toggle(true);
  144.     Events.trackMouse(event);
  145.     if (ai.force) {
  146.       App.start();
  147.     } else if (cfg.start === 'auto' && !rule.manual) {
  148.       App.belate();
  149.     } else {
  150.       Status.set('ready');
  151.     }
  152.   },
  153.  
  154.   belate() {
  155.     if (cfg.preload) {
  156.       ai.preloadStart = now();
  157.       App.start();
  158.       Status.set('+preloading');
  159.       setTimeout(Status.set, cfg.delay, '-preloading');
  160.     } else {
  161.       ai.timer = setTimeout(App.start, cfg.delay);
  162.     }
  163.   },
  164.  
  165.   checkImageTab() {
  166.     const el = doc.body.firstElementChild;
  167.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  168.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  169.   },
  170.  
  171.   checkProgress({start} = {}) {
  172.     const p = ai.popup;
  173.     if (!p)
  174.       return;
  175.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  176.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  177.     if (h)
  178.       return App.canCommit(w, h);
  179.     if (start) {
  180.       clearInterval(ai.timerProgress);
  181.       ai.timerProgress = setInterval(App.checkProgress, 150);
  182.     }
  183.   },
  184.  
  185.   canCommit(w, h) {
  186.     if (!ai.force && ai.rect && !ai.gItems &&
  187.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  188.       App.deactivate();
  189.       return false;
  190.     }
  191.     App.stopTimers();
  192.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  193.     if (wait > 0) {
  194.       ai.timer = setTimeout(App.checkProgress, wait);
  195.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  196.       App.handleError({type: 'error'});
  197.     } else {
  198.       App.commit();
  199.     }
  200.     return true;
  201.   },
  202.  
  203.   async commit() {
  204.     const p = ai.popup;
  205.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  206.     if (isDecoded) {
  207.       await p.decode();
  208.       if (p !== ai.popup)
  209.         return;
  210.     }
  211.     App.updateStyles();
  212.     Calc.measurePopup();
  213.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  214.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  215.     if (willMove)
  216.       Popup.move();
  217.     Bar.updateName();
  218.     Bar.updateDetails();
  219.     Status.set(!ai.popupLoaded && 'loading');
  220.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  221.                ai.nheight > p.clientHeight + ai.extras.h;
  222.     if (ai.large) {
  223.       Status.set('+large');
  224.       // prevent a blank bg+border in FF
  225.       if (isFF && p.complete && !isDecoded)
  226.         p.style.backgroundImage = `url('${p.src}')`;
  227.     }
  228.   },
  229.  
  230.   deactivate({wait} = {}) {
  231.     App.stopTimers();
  232.     if (ai.req)
  233.       tryCatch.call(ai.req, ai.req.abort);
  234.     if (ai.tooltip)
  235.       ai.tooltip.node.title = ai.tooltip.text;
  236.     Status.set(false);
  237.     Bar.set(false);
  238.     Events.toggle(false);
  239.     Popup.destroy();
  240.     if (wait) {
  241.       App.isEnabled = false;
  242.       setTimeout(App.enable, 200);
  243.     }
  244.     ai = {rule: {}};
  245.   },
  246.  
  247.   enable() {
  248.     App.isEnabled = true;
  249.   },
  250.  
  251.   handleError(e, rule = ai.rule) {
  252.     if (rule && rule.onerror === 'skip')
  253.       return;
  254.     if (CspSniffer.init &&
  255.         location.protocol === 'https:' &&
  256.         !ai.xhr &&
  257.         !ai.imageUrl.startsWith(location.origin + '/')) {
  258.       Popup.create(ai.imageUrl, ai.pageUrl, e);
  259.       return;
  260.     }
  261.     const fe = Util.formatError(e, rule);
  262.     if (!rule || !ai.urls || !ai.urls.length)
  263.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  264.     if (ai.urls && ai.urls.length) {
  265.       ai.url = ai.urls.shift();
  266.       if (ai.url) {
  267.         App.stopTimers();
  268.         App.startSingle();
  269.       } else {
  270.         App.deactivate();
  271.       }
  272.     } else if (ai.node) {
  273.       Status.set('error');
  274.       Bar.set(fe.message, 'error');
  275.     }
  276.   },
  277.  
  278.   /** @param {MessageEvent} e */
  279.   onMessage(e) {
  280.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  281.       e.stopImmediatePropagation();
  282.       for (const el of doc.getElementsByTagName('iframe')) {
  283.         if (el.contentWindow === e.source) {
  284.           const s = Calc.frameSize(el, window).join(':');
  285.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  286.           return;
  287.         }
  288.       }
  289.     }
  290.   },
  291.  
  292.   /** @param {MessageEvent} e */
  293.   onMessageChild(e) {
  294.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  295.       e.stopImmediatePropagation();
  296.       removeEventListener('message', App.onMessageChild, true);
  297.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  298.       if (w && h) ai.view = {w, h, x, y};
  299.     }
  300.   },
  301.  
  302.   start() {
  303.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  304.     if (!Util.isHovered(ai.node)) {
  305.       App.deactivate();
  306.       return;
  307.     }
  308.     App.updateStyles();
  309.     if (ai.gallery)
  310.       App.startGallery();
  311.     else
  312.       App.startSingle();
  313.   },
  314.  
  315.   startSingle() {
  316.     Status.loading();
  317.     ai.imageUrl = null;
  318.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  319.       Remoting.findRedirect();
  320.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  321.       App.startFromQ();
  322.     } else {
  323.       Popup.create(ai.url);
  324.       Ruler.runC();
  325.     }
  326.   },
  327.  
  328.   async startFromQ() {
  329.     try {
  330.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  331.       const url = Ruler.runQ(responseText, doc, finalUrl);
  332.       if (!url)
  333.         throw 'The "q" rule did not produce any URL.';
  334.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  335.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  336.         if (!info || !info.url)
  337.           throw `Couldn't follow URL: ${url}`;
  338.         Object.assign(ai, info);
  339.         App.startSingle();
  340.       } else {
  341.         Popup.create(url, finalUrl);
  342.         Ruler.runC(responseText, doc);
  343.       }
  344.     } catch (e) {
  345.       App.handleError(e);
  346.     }
  347.   },
  348.  
  349.   async startGallery() {
  350.     Status.loading();
  351.     try {
  352.       const startUrl = ai.url;
  353.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  354.       const items = await new Promise(resolve => {
  355.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  356.           resolve);
  357.         if (Array.isArray(it))
  358.           resolve(it);
  359.       });
  360.       // bail out if the gallery's async callback took too long
  361.       if (ai.url !== startUrl) return;
  362.       ai.gNum = items.length;
  363.       ai.gItems = items.length && items;
  364.       if (ai.gItems) {
  365.         const i = items.index;
  366.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  367.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  368.             Gallery.findIndex(ai.url);
  369.         setTimeout(Gallery.next);
  370.       } else {
  371.         throw 'Empty gallery';
  372.       }
  373.     } catch (e) {
  374.       App.handleError(e);
  375.     }
  376.   },
  377.  
  378.   stopTimers() {
  379.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  380.       clearTimeout(ai[timer]);
  381.     clearInterval(ai.timerProgress);
  382.   },
  383.  
  384.   toggleZoom({keepScale} = {}) {
  385.     const p = ai.popup;
  386.     if (!p || !ai.scales || ai.scales.length < 2)
  387.       return;
  388.     ai.zoomed = !ai.zoomed;
  389.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  390.     if (ai.zooming)
  391.       p.classList.add(`${PREFIX}zooming`);
  392.     Popup.move();
  393.     Bar.updateDetails();
  394.     Status.set(ai.zoomed ? 'zoom' : false);
  395.     return ai.zoomed;
  396.   },
  397.  
  398.   updateStyles() {
  399.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  400.     Util.addStyle('rule', ai.rule.css || '');
  401.   },
  402. };
  403.  
  404. const Bar = {
  405.  
  406.   set(label, className) {
  407.     let b = ai.bar;
  408.     if (typeof label !== 'string') {
  409.       $remove(b);
  410.       ai.bar = null;
  411.       return;
  412.     }
  413.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  414.     App.updateStyles();
  415.     Bar.updateDetails();
  416.     Bar.show();
  417.     b.textContent = '';
  418.     b.innerHTML = TRUSTED.createHTML(label);
  419.     if (!b.parentNode) {
  420.       doc.body.appendChild(b);
  421.       Util.forceLayout(b);
  422.     }
  423.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  424.   },
  425.  
  426.   show(isForced) {
  427.     clearTimeout(ai.timerBar);
  428.     ai.bar.style.removeProperty('opacity');
  429.     if (isForced)
  430.       ai.bar.dataset.force = '';
  431.     else
  432.       ai.timerBar = setTimeout(Bar.hide, 3000);
  433.   },
  434.  
  435.   hide(isForced) {
  436.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  437.       $css(ai.bar, {opacity: 0});
  438.       delete ai.bar.dataset.force;
  439.     }
  440.   },
  441.  
  442.   updateName() {
  443.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  444.     if (gi) {
  445.       const item = gi[i];
  446.       const noDesc = !gi.some(_ => _.desc);
  447.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  448.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  449.         item.desc,
  450.       ].filter(Boolean).join(' - ')}`;
  451.       Bar.set(c.trim() || ' ', 'gallery', true);
  452.     } else if ('caption' in ai) {
  453.       Bar.set(ai.caption, 'caption');
  454.     } else if (ai.tooltip) {
  455.       Bar.set(ai.tooltip.text, 'tooltip');
  456.     } else {
  457.       Bar.set(' ', 'info');
  458.     }
  459.   },
  460.  
  461.   updateDetails() {
  462.     if (!ai.bar) return;
  463.     const r = ai.rotate;
  464.     const zoom = ai.nwidth && `${
  465.       Math.round(ai.scale * 100)
  466.     }%${
  467.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  468.     }${
  469.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  470.     }, ${
  471.       ai.nwidth
  472.     } x ${
  473.       ai.nheight
  474.     } px, ${
  475.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  476.     } MP, ${
  477.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  478.     }`.replace(/\x20/g, '\xA0');
  479.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  480.       if (zoom) ai.bar.dataset.zoom = zoom;
  481.       else delete ai.bar.dataset.zoom;
  482.       Bar.show();
  483.     }
  484.   },
  485. };
  486.  
  487. const Calc = {
  488.  
  489.   aspectRatio(w, h) {
  490.     for (let rat = w / h, a, b = 0; ;) {
  491.       b++;
  492.       a = Math.round(w * b / h);
  493.       if (a > 10 && b > 10 || a > 100 || b > 100)
  494.         return rat.toFixed(2);
  495.       if (Math.abs(a / b - rat) < .01)
  496.         return `${a}:${b}`;
  497.     }
  498.   },
  499.  
  500.   frameSize(elFrame, wnd) {
  501.     if (!elFrame) return;
  502.     const r = elFrame.getBoundingClientRect();
  503.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  504.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  505.     const x = r.left < 0 ? -r.left : 0;
  506.     const y = r.top < 0 ? -r.top : 0;
  507.     return [w, h, x, y];
  508.   },
  509.  
  510.   generateScales(fit) {
  511.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  512.     const zoomStep = cfg.zoomStep / 100;
  513.     const arr = [scale];
  514.     if (fit !== 1) {
  515.       const diff = goal / scale;
  516.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  517.       const step = steps && Math.pow(diff, 1 / steps);
  518.       for (let i = steps; --i > 0;)
  519.         arr.push((scale *= step));
  520.       arr.push(scale = goal);
  521.     }
  522.     while ((scale *= zoomStep) <= ZOOM_MAX)
  523.       arr.push(scale);
  524.     return arr;
  525.   },
  526.  
  527.   measurePopup() {
  528.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  529.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  530.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  531.     if (p.clientWidth > nw) {
  532.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  533.       nh = ai.nheight = w / nw * nh | 0;
  534.       nw = ai.nwidth = w;
  535.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  536.     }
  537.     p.className = `${PREFIX}show`;
  538.     p.removeAttribute('style');
  539.     const s = getComputedStyle(p);
  540.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  541.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  542.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  543.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  544.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  545.     ai.extras = {
  546.       inw, inh,
  547.       outw, outh,
  548.       o: o2 / 2,
  549.       w: inw + outw,
  550.       h: inh + outh,
  551.     };
  552.     const fit = Math.min(
  553.       (ai.view.w - ai.extras.w) / ai.nwidth,
  554.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  555.     const isCustom = !cfg.fit && cfg.scales.length;
  556.     let cutoff = Math.min(1, fit);
  557.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  558.     if (isCustom) {
  559.       const dst = [];
  560.       for (const scale of cfg.scales) {
  561.         const val = parseFloat(scale) || fit;
  562.         dst.push(val);
  563.         if (isCustom && typeof scale === 'string') {
  564.           if (scale.includes('!')) cutoff = val;
  565.           if (scale.includes('*')) scaleZoom = val;
  566.         }
  567.       }
  568.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  569.     } else {
  570.       ai.scales = Calc.generateScales(fit);
  571.     }
  572.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  573.     ai.scaleFit = fit;
  574.     ai.scaleZoom = scaleZoom;
  575.   },
  576.  
  577.   rect() {
  578.     let {node, rule} = ai;
  579.     let n = rule.rect && node.closest(rule.rect);
  580.     if (n) return n.getBoundingClientRect();
  581.     const nested = node.getElementsByTagName('*');
  582.     let maxArea = 0;
  583.     let maxBounds;
  584.     n = node;
  585.     for (let i = 0; n; n = nested[i++]) {
  586.       const bounds = n.getBoundingClientRect();
  587.       const area = bounds.width * bounds.height;
  588.       if (area > maxArea) {
  589.         maxArea = area;
  590.         maxBounds = bounds;
  591.         node = n;
  592.       }
  593.     }
  594.     return maxBounds;
  595.   },
  596.  
  597.   scaleBiggerThan(scale, i, arr) {
  598.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  599.   },
  600.  
  601.   scaleIndex(dir) {
  602.     const i = ai.scales.indexOf(ai.scale);
  603.     if (i >= 0) return i + dir;
  604.     for (
  605.       let len = ai.scales.length,
  606.         i = dir > 0 ? 0 : len - 1;
  607.       i >= 0 && i < len;
  608.       i += dir
  609.     ) {
  610.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  611.         return i;
  612.     }
  613.     return -1;
  614.   },
  615.  
  616.   scaleForFirstZoom(keepScale) {
  617.     const z = ai.scaleZoom;
  618.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  619.   },
  620.  
  621.   updateViewSize() {
  622.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  623.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  624.     if (window === top) return;
  625.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  626.     if (w && h) {
  627.       ai.view = {w, h, x: 0, y: 0};
  628.     } else {
  629.       addEventListener('message', App.onMessageChild, true);
  630.       parent.postMessage(MSG.getViewSize, '*');
  631.     }
  632.   },
  633. };
  634.  
  635. class Config {
  636.  
  637.   constructor({data: c, save}) {
  638.     if (typeof c === 'string')
  639.       c = tryCatch(JSON.parse, c);
  640.     if (typeof c !== 'object' || !c)
  641.       c = {};
  642.     const {DEFAULTS} = Config;
  643.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  644.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  645.         '';
  646.     if (c.version !== DEFAULTS.version) {
  647.       if (typeof c.hosts === 'string')
  648.         c.hosts = c.hosts.split('\n')
  649.           .map(s => tryCatch(JSON.parse, s) || s)
  650.           .filter(Boolean);
  651.       if (c.close === true || c.close === false)
  652.         c.zoomOut = c.close ? 'auto' : 'stay';
  653.       for (const key in DEFAULTS)
  654.         if (typeof c[key] !== typeof DEFAULTS[key])
  655.           c[key] = DEFAULTS[key];
  656.       if (c.version === 3 && c.scales[0] === 0)
  657.         c.scales[0] = '0!';
  658.       for (const key in c)
  659.         if (!(key in DEFAULTS))
  660.           delete c[key];
  661.       c.version = DEFAULTS.version;
  662.       if (save)
  663.         GM.setValue('cfg', c);
  664.     }
  665.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  666.       App.globalStyle = '';
  667.     if (!Array.isArray(c.scales))
  668.       c.scales = [];
  669.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  670.     Object.assign(this, DEFAULTS, c);
  671.   }
  672.  
  673.   static async load(opts) {
  674.     opts.data = await GM.getValue('cfg');
  675.     return new Config(opts);
  676.   }
  677.  
  678.   _getCss() {
  679.     const {css} = this;
  680.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  681.   }
  682. }
  683.  
  684. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  685.   center: false,
  686.   css: '',
  687.   delay: 500,
  688.   fit: '',
  689.   globalStatus: false,
  690.   // prefer ' inside rules because " will be displayed as \"
  691.   // example: "img[src*='icon']"
  692.   hosts: [{
  693.     name: 'No popup for YouTube thumbnails',
  694.     d: 'www.youtube.com',
  695.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  696.     s: '',
  697.   }, {
  698.     name: 'No popup for SVG/PNG icons',
  699.     d: '',
  700.     e: "img[src*='icon']",
  701.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  702.     s: '',
  703.   }],
  704.   imgtab: false,
  705.   mute: false,
  706.   preload: false,
  707.   scale: 1.25,
  708.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  709.   start: 'auto',
  710.   startAlt: 'context',
  711.   startAltShown: false,
  712.   uiBackgroundColor: '#ffffff',
  713.   uiBackgroundOpacity: 100,
  714.   uiBorderColor: '#000000',
  715.   uiBorderOpacity: 100,
  716.   uiBorder: 0,
  717.   uiFadein: true,
  718.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  719.   uiShadowColor: '#000000',
  720.   uiShadowOpacity: 80,
  721.   uiShadow: 20,
  722.   uiPadding: 0,
  723.   uiMargin: 0,
  724.   version: 6,
  725.   waitLoad: false,
  726.   xhr: true,
  727.   zoom: 'context',
  728.   zoomOut: 'auto',
  729.   zoomStep: 133,
  730. });
  731.  
  732. const CspSniffer = {
  733.  
  734.   /** @type {?Object<string,string[]>} */
  735.   csp: null,
  736.   selfUrl: location.origin + '/',
  737.  
  738.   // will be null when done
  739.   init() {
  740.     this.busy = new Promise(resolve => {
  741.       const xhr = new XMLHttpRequest();
  742.       xhr.open('get', location);
  743.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  744.       xhr.onreadystatechange = () => {
  745.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  746.           this.csp = this._parse(xhr.getResponseHeader('content-security-policy'));
  747.           this.init = this.busy = xhr.onreadystatechange = null;
  748.           xhr.abort();
  749.           resolve();
  750.         }
  751.       };
  752.       xhr.send();
  753.     });
  754.   },
  755.  
  756.   async check(url, allowInit) {
  757.     if (allowInit && this.init) this.init();
  758.     if (this.busy) await this.busy;
  759.     const isVideo = Util.isVideoUrl(url);
  760.     let mode;
  761.     if (this.csp) {
  762.       const src = this.csp[isVideo ? 'media' : 'img'];
  763.       if (!src.some(this._srcMatches, url))
  764.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  765.     }
  766.     return [mode || ai.xhr, isVideo];
  767.   },
  768.  
  769.   _parse(csp) {
  770.     if (!csp) return;
  771.     const src = {};
  772.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  773.     for (let m; (m = rx.exec(csp));)
  774.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  775.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  776.       nonce = RegExp.$1;
  777.     if ((src.trusted || []).includes("'script'"))
  778.       App.NOP = () => {};
  779.     if (!src.img) src.img = src.default || [];
  780.     if (!src.media) src.media = src.default || [];
  781.     for (const set of [src.img, src.media]) {
  782.       set.forEach((item, i) => {
  783.         if (item !== '*' && item.includes('*')) {
  784.           set[i] = new RegExp(
  785.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  786.             item
  787.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  788.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  789.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  790.             .replace(/[^/]$/, '$&/'));
  791.         }
  792.       });
  793.     }
  794.     return src;
  795.   },
  796.  
  797.   /** @this string */
  798.   _srcMatches(src) {
  799.     return src instanceof RegExp ? src.test(this) :
  800.       src === '*' ||
  801.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  802.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  803.   },
  804. };
  805.  
  806. const Events = {
  807.  
  808.   hoverData: null,
  809.   hoverTimer: 0,
  810.   ignoreKeyHeld: false,
  811.  
  812.   onMouseOver(e) {
  813.     let node = e.target;
  814.     Events.ignoreKeyHeld = e.shiftKey;
  815.     if (!App.isEnabled ||
  816.         e.shiftKey ||
  817.         ai.zoomed ||
  818.         node === ai.popup ||
  819.         node === doc.body ||
  820.         node === doc.documentElement ||
  821.         node === elConfig ||
  822.         ai.gallery && ai.rectHovered)
  823.       return;
  824.     if (node.shadowRoot)
  825.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  826.     // we don't want to process everything in the path of a quickly moving mouse cursor
  827.     Events.hoverData = {e, node, start: now()};
  828.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  829.   },
  830.  
  831.   onMouseOverThrottled(force) {
  832.     if (!Events.hoverData)
  833.       return;
  834.     const {start, e, node} = Events.hoverData;
  835.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  836.     const wait = force ? 0 : start + SETTLE_TIME - now();
  837.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  838.     if (Events.hoverTimer || !Util.isHovered(node))
  839.       return;
  840.     Events.hoverData = null;
  841.     if (!Ruler.rules)
  842.       Ruler.init();
  843.     const info = RuleMatcher.adaptiveFind(node);
  844.     if (info && info.url && info.node !== ai.node)
  845.       App.activate(info, e);
  846.   },
  847.  
  848.   onMouseOut(e) {
  849.     if (!e.relatedTarget && !e.shiftKey)
  850.       App.deactivate();
  851.   },
  852.  
  853.   onMouseOutShadow(e) {
  854.     const root = e.target.shadowRoot;
  855.     if (root) {
  856.       root.removeEventListener('mouseover', Events.onMouseOver);
  857.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  858.     }
  859.   },
  860.  
  861.   onMouseMove(e) {
  862.     Events.trackMouse(e);
  863.     if (e.shiftKey)
  864.       return;
  865.     if (!ai.zoomed && !ai.rectHovered) {
  866.       App.deactivate();
  867.     } else if (ai.zoomed) {
  868.       Popup.move();
  869.       const {cx, cy, view: {w, h}} = ai;
  870.       const bx = w / 6;
  871.       const by = h / 6;
  872.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  873.       Status.set(`${onEdge ? '+' : '-'}edge`);
  874.     }
  875.   },
  876.  
  877.   onMouseDown({shiftKey, button}) {
  878.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  879.       ai.controlled = ai.zoomed = true;
  880.     } else if (button === 2 || shiftKey) {
  881.       // Shift = ignore; RMB will be processed in onContext
  882.     } else {
  883.       App.deactivate({wait: true});
  884.       doc.addEventListener('mouseup', App.enable, {once: true});
  885.     }
  886.   },
  887.  
  888.   onMouseScroll(e) {
  889.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  890.     if (ai.zoomed) {
  891.       Events.zoomInOut(dir);
  892.     } else if (ai.gNum > 1 && ai.popup) {
  893.       Gallery.next(-dir);
  894.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  895.       App.toggleZoom();
  896.     } else {
  897.       App.deactivate();
  898.       return;
  899.     }
  900.     dropEvent(e);
  901.   },
  902.  
  903.   onKeyDown(e) {
  904.     // Synthesized events may be of the wrong type and not have a `key`
  905.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  906.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  907.     if (!p &&
  908.         !Events.ignoreKeyHeld &&
  909.         key === '^Control' &&
  910.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  911.       dropEvent(e);
  912.       if (Events.hoverData) {
  913.         Events.hoverData.e = e;
  914.         Events.onMouseOverThrottled(true);
  915.       }
  916.       if (ai.node) {
  917.         ai.force = true;
  918.         App.start();
  919.       }
  920.     }
  921.     if (!p || e.repeat)
  922.       return;
  923.     switch (key) {
  924.       case '+Shift':
  925.         if (ai.shiftKeyTime)
  926.           return;
  927.         ai.shiftKeyTime = now();
  928.         Status.set('+shift');
  929.         Bar.show(true);
  930.         if (p.tagName === 'VIDEO')
  931.           p.controls = true;
  932.         return;
  933.       case 'KeyA':
  934.         if (!p.hasAttribute('data-no-aa'))
  935.           p.setAttribute('data-no-aa', '');
  936.         else
  937.           p.removeAttribute('data-no-aa');
  938.         break;
  939.       case 'ArrowRight':
  940.       case 'KeyJ':
  941.         Gallery.next(1);
  942.         break;
  943.       case 'ArrowLeft':
  944.       case 'KeyK':
  945.         Gallery.next(-1);
  946.         break;
  947.       case 'KeyD':
  948.         Remoting.saveFile();
  949.         break;
  950.       case 'KeyH': // flip horizontally
  951.       case 'KeyV': // flip vertically
  952.       case 'KeyL': // rotate left
  953.       case 'KeyR': // rotate right
  954.         if (!p)
  955.           return;
  956.         if (key === 'KeyH' || key === 'KeyV') {
  957.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  958.           ai[side] = !ai[side];
  959.         } else {
  960.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  961.         }
  962.         Bar.updateDetails();
  963.         Popup.move();
  964.         break;
  965.       case 'KeyM':
  966.         if (p.tagName === 'VIDEO')
  967.           p.muted = !p.muted;
  968.         break;
  969.       case 'KeyT':
  970.         GM.openInTab(Util.tabFixUrl() || p.src);
  971.         App.deactivate();
  972.         break;
  973.       case 'Minus':
  974.       case 'NumpadSubtract':
  975.         if (ai.zoomed) {
  976.           Events.zoomInOut(-1);
  977.         } else {
  978.           App.toggleZoom();
  979.         }
  980.         break;
  981.       case 'Equal':
  982.       case 'NumpadAdd':
  983.         if (ai.zoomed) {
  984.           Events.zoomInOut(1);
  985.         } else {
  986.           App.toggleZoom();
  987.         }
  988.         break;
  989.       case 'Escape':
  990.         App.deactivate({wait: true});
  991.         break;
  992.       case '!Alt':
  993.         return;
  994.       default:
  995.         App.deactivate({wait: true});
  996.         return;
  997.     }
  998.     dropEvent(e);
  999.   },
  1000.  
  1001.   onKeyUp(e) {
  1002.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  1003.       Status.set('-shift');
  1004.       Bar.hide(true);
  1005.       if ((ai.popup || {}).controls)
  1006.         ai.popup.controls = false;
  1007.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1008.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1009.         ai.controlled = false;
  1010.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  1011.         App.toggleZoom();
  1012.       else
  1013.         App.deactivate({wait: true});
  1014.       ai.shiftKeyTime = 0;
  1015.     }
  1016.   },
  1017.  
  1018.   onContext(e) {
  1019.     if (Events.ignoreKeyHeld)
  1020.       return;
  1021.     const p = ai.popup;
  1022.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1023.       dropEvent(e);
  1024.     } else if (!p && (
  1025.       cfg.start === 'context' ||
  1026.       cfg.start === 'contextMK' ||
  1027.       cfg.start === 'contextM' && (e.button === 2) ||
  1028.       cfg.start === 'contextK' && (e.button !== 2) ||
  1029.       (cfg.start === 'auto' && ai.rule.manual)
  1030.     )) {
  1031.       // right-clicked on an image while the context menu is shown for something else
  1032.       if (!ai.node && !Events.hoverData)
  1033.         Events.onMouseOver(e);
  1034.       Events.onMouseOverThrottled(true);
  1035.       if (ai.node) {
  1036.         ai.force = true;
  1037.         App.start();
  1038.         dropEvent(e);
  1039.       }
  1040.     } else if (p) {
  1041.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1042.     }
  1043.   },
  1044.  
  1045.   pierceShadow(node, x, y) {
  1046.     for (let root; (root = node.shadowRoot);) {
  1047.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1048.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1049.       const inner = root.elementFromPoint(x, y);
  1050.       if (!inner || inner === node)
  1051.         break;
  1052.       node = inner;
  1053.     }
  1054.     return node;
  1055.   },
  1056.  
  1057.   toggle(enable) {
  1058.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1059.     const passive = {passive: true, capture: true};
  1060.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1061.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1062.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1063.     window[onOff]('keydown', Events.onKeyDown, true); // override normal page listeners
  1064.     window[onOff]('keyup', Events.onKeyUp, true);
  1065.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false});
  1066.   },
  1067.  
  1068.   trackMouse(e) {
  1069.     const cx = ai.cx = e.clientX;
  1070.     const cy = ai.cy = e.clientY;
  1071.     const r = ai.rect || (ai.rect = Calc.rect());
  1072.     ai.rectHovered =
  1073.       cx > r.left - 2 && cx < r.right + 2 &&
  1074.       cy > r.top - 2 && cy < r.bottom + 2;
  1075.   },
  1076.  
  1077.   zoomInOut(dir) {
  1078.     const i = Calc.scaleIndex(dir);
  1079.     const n = ai.scales.length;
  1080.     if (i >= 0 && i < n)
  1081.       ai.scale = ai.scales[i];
  1082.     const zo = cfg.zoomOut;
  1083.     if (i <= 0 && zo !== 'stay') {
  1084.       if (ai.scaleFit < ai.scale * .99) {
  1085.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1086.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1087.         App.deactivate({wait: true});
  1088.         return;
  1089.       }
  1090.       ai.zoomed = zo !== 'unzoom';
  1091.     } else {
  1092.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1093.     }
  1094.     if (ai.zooming)
  1095.       ai.popup.classList.add(`${PREFIX}zooming`);
  1096.     Popup.move();
  1097.     Bar.updateDetails();
  1098.   },
  1099. };
  1100.  
  1101. const Gallery = {
  1102.  
  1103.   makeParser(g) {
  1104.     return isFunction(g) ? g : Gallery.defaultParser;
  1105.   },
  1106.  
  1107.   findIndex(gUrl) {
  1108.     const sel = gUrl.split('#')[1];
  1109.     if (!sel)
  1110.       return 0;
  1111.     if (/^\d+$/.test(sel))
  1112.       return parseInt(sel);
  1113.     for (let i = ai.gNum; i--;) {
  1114.       let {url} = ai.gItems[i];
  1115.       if (Array.isArray(url))
  1116.         url = url[0];
  1117.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1118.         return i;
  1119.     }
  1120.     return 0;
  1121.   },
  1122.  
  1123.   next(dir) {
  1124.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1125.     const item = ai.gItems[ai.gIndex];
  1126.     if (Array.isArray(item.url)) {
  1127.       ai.urls = item.url.slice(1);
  1128.       ai.url = item.url[0];
  1129.     } else {
  1130.       ai.urls = null;
  1131.       ai.url = item.url;
  1132.     }
  1133.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1134.     App.startSingle();
  1135.     Bar.updateName();
  1136.   },
  1137.  
  1138.   nextIndex(dir) {
  1139.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1140.   },
  1141.  
  1142.   defaultParser(text, doc, docUrl, m, rule) {
  1143.     const {g} = rule;
  1144.     const qEntry = g.entry;
  1145.     const qCaption = ensureArray(g.caption);
  1146.     const qImage = g.image || 'img';
  1147.     const qTitle = g.title;
  1148.     const fix =
  1149.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1150.       (s => s.trim());
  1151.     const items = [...$$(qEntry || qImage, doc)]
  1152.       .map(processEntry)
  1153.       .filter(Boolean);
  1154.     items.title = processTitle();
  1155.     items.index =
  1156.       typeof g.index === 'string' &&
  1157.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1158.       RX_HAS_CODE.test(g.index) &&
  1159.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1160.       g.index;
  1161.     return items;
  1162.  
  1163.     function processEntry(entry) {
  1164.       const item = {};
  1165.       try {
  1166.         const img = qEntry ? $(qImage, entry) : entry;
  1167.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1168.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1169.       } catch (e) {}
  1170.       return item.url && item;
  1171.     }
  1172.  
  1173.     function processCaption(selector) {
  1174.       const el = $(selector, this) ||
  1175.                  $orSelf(selector, this.previousElementSibling) ||
  1176.                  $orSelf(selector, this.nextElementSibling);
  1177.       return el && fix(el.textContent);
  1178.     }
  1179.  
  1180.     function processTitle() {
  1181.       const el = $(qTitle, doc);
  1182.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1183.     }
  1184.  
  1185.     function $orSelf(selector, el) {
  1186.       if (el && !el.matches(qEntry))
  1187.         return el.matches(selector) ? el : $(selector, el);
  1188.     }
  1189.   },
  1190. };
  1191.  
  1192. const Menu = window === top && GM.registerMenuCommand && {
  1193.   curAltName: '',
  1194.   unreg: GM.unregisterMenuCommand,
  1195.   makeAltName: () => Menu.unreg
  1196.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1197.     : 'MPIV: toggle auto-start',
  1198.   register() {
  1199.     GM.registerMenuCommand('MPIV: configure', setup);
  1200.     Menu.registerAlt();
  1201.   },
  1202.   registerAlt() {
  1203.     if (cfg.startAltShown) {
  1204.       Menu.curAltName = Menu.makeAltName();
  1205.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1206.     }
  1207.   },
  1208.   reRegisterAlt() {
  1209.     const old = Menu.curAltName;
  1210.     if (old && Menu.unreg) Menu.unreg(old);
  1211.     if (!old || Menu.unreg) Menu.registerAlt();
  1212.   },
  1213.   onAltToggled() {
  1214.     const wasAuto = cfg.start === 'auto';
  1215.     if (wasAuto) {
  1216.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1217.     } else {
  1218.       cfg.startAlt = cfg.start;
  1219.       cfg.start = 'auto';
  1220.     }
  1221.     Menu.reRegisterAlt();
  1222.   },
  1223. };
  1224.  
  1225. const Popup = {
  1226.  
  1227.   async create(src, pageUrl, error) {
  1228.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1229.       (ai.popup.dataset.galleryFlip = '') === '';
  1230.     Popup.destroy();
  1231.     ai.imageUrl = src;
  1232.     if (!src)
  1233.       return;
  1234.     const myAi = ai;
  1235.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1236.     if (ai !== myAi)
  1237.       return;
  1238.     if (!xhr && error) {
  1239.       App.handleError(error);
  1240.       return;
  1241.     }
  1242.     Object.assign(ai, {pageUrl, xhr});
  1243.     if (xhr)
  1244.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1245.     if (ai !== myAi || !src)
  1246.       return;
  1247.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1248.     p.id = `${PREFIX}popup`;
  1249.     p.src = src;
  1250.     p.addEventListener('error', App.handleError);
  1251.     if (ai.zooming)
  1252.       p.addEventListener('transitionend', Popup.onZoom);
  1253.     if (inGallery) {
  1254.       p.dataset.galleryFlip = '';
  1255.       p.setAttribute('loaded', '');
  1256.     }
  1257.     doc.body.insertBefore(p, ai.bar || undefined);
  1258.     await 0;
  1259.     if (App.checkProgress({start: true}) === false)
  1260.       return;
  1261.     if (p.complete)
  1262.       Popup.onLoad.call(ai.popup);
  1263.     else if (!isVideo)
  1264.       p.addEventListener('load', Popup.onLoad, {once: true});
  1265.   },
  1266.  
  1267.   destroy() {
  1268.     const p = ai.popup;
  1269.     if (!p) return;
  1270.     p.removeEventListener('load', Popup.onLoad);
  1271.     p.removeEventListener('error', App.handleError);
  1272.     if (isFunction(p.pause))
  1273.       p.pause();
  1274.     if (ai.blobUrl)
  1275.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1276.     p.remove();
  1277.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1278.   },
  1279.  
  1280.   move() {
  1281.     let x, y;
  1282.     const {cx, cy, extras, view} = ai;
  1283.     const vw = view.w - extras.outw;
  1284.     const vh = view.h - extras.outh;
  1285.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1286.     const h0 = ai.scale * ai.nheight + extras.inh;
  1287.     const isSwapped = ai.rotate % 180;
  1288.     const w = isSwapped ? h0 : w0;
  1289.     const h = isSwapped ? w0 : h0;
  1290.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1291.       const r = ai.rect;
  1292.       const rx = (r.left + r.right) / 2;
  1293.       const ry = (r.top + r.bottom) / 2;
  1294.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1295.         if (h < vh - 60)
  1296.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1297.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1298.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1299.         if (w < vw - 60)
  1300.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1301.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1302.       }
  1303.     }
  1304.     if (x == null) {
  1305.       x = vw > w
  1306.         ? (vw - w) / 2 + view.x
  1307.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1308.     }
  1309.     if (y == null) {
  1310.       y = vh > h
  1311.         ? (vh - h) / 2 + view.y
  1312.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1313.     }
  1314.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1315.     x += extras.o - diff;
  1316.     y += extras.o + diff;
  1317.     $css(ai.popup, {
  1318.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1319.                  `rotate(${ai.rotate || 0}deg) ` +
  1320.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1321.       width: `${Math.round(w0)}px`,
  1322.       height: `${Math.round(h0)}px`,
  1323.     });
  1324.   },
  1325.  
  1326.   onLoad() {
  1327.     if (this === ai.popup) {
  1328.       this.setAttribute('loaded', '');
  1329.       ai.popupLoaded = true;
  1330.       Status.set('-loading');
  1331.       if (ai.preloadUrl) {
  1332.         $create('img', {src: ai.preloadUrl});
  1333.         ai.preloadUrl = null;
  1334.       }
  1335.     }
  1336.   },
  1337.  
  1338.   onZoom() {
  1339.     this.classList.remove(`${PREFIX}zooming`);
  1340.   },
  1341. };
  1342.  
  1343. const PopupVideo = {
  1344.   async create() {
  1345.     ai.bufBar = false;
  1346.     ai.bufStart = now();
  1347.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1348.     return $create('video', {
  1349.       autoplay: true,
  1350.       controls: shouldMute,
  1351.       muted: shouldMute,
  1352.       loop: true,
  1353.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1354.       onprogress: PopupVideo.progress,
  1355.       oncanplaythrough: PopupVideo.progressDone,
  1356.       onvolumechange: PopupVideo.rememberVolume,
  1357.     });
  1358.   },
  1359.  
  1360.   progress() {
  1361.     const {duration} = this;
  1362.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1363.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1364.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1365.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1366.     }
  1367.   },
  1368.  
  1369.   progressDone() {
  1370.     this.onprogress = this.oncanplaythrough = null;
  1371.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1372.       Bar.set(false);
  1373.     Popup.onLoad.call(this);
  1374.   },
  1375.  
  1376.   rememberVolume() {
  1377.     GM.setValue('volume', this.volume);
  1378.   },
  1379. };
  1380.  
  1381. const Ruler = {
  1382. /*
  1383.  'u' works only with URLs so it's ignored if 'html' is true
  1384.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1385.    |foo = url or text must start with foo
  1386.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1387.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1388.  'r' is checked only if 'u' matches first
  1389. */
  1390.   init() {
  1391.     const errors = new Map();
  1392.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1393.     const hasGMAE = typeof GM_addElement === 'function';
  1394.     const canEval = nonce || hasGMAE;
  1395.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1396.     const evalRules = [];
  1397.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1398.     for (const [rule, err] of errors.entries()) {
  1399.       if (!RX_EVAL_BLOCKED.test(err)) {
  1400.         App.handleError('Invalid custom host rule:', rule);
  1401.         continue;
  1402.       }
  1403.       if (canEval) {
  1404.         evalCode.push(evalRules.length ? ',' : '',
  1405.           '[', customRules.indexOf(rule), ',{',
  1406.           ...Object.keys(FN_ARGS)
  1407.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1408.             .filter(Boolean),
  1409.           '}]');
  1410.       }
  1411.       evalRules.push(rule);
  1412.     }
  1413.     if (evalRules.length) {
  1414.       let result, wnd;
  1415.       if (canEval) {
  1416.         const GMAE = hasGMAE
  1417.           ? GM_addElement // eslint-disable-line no-undef
  1418.           : (tag, {textContent}) => document.head.appendChild(
  1419.             Object.assign(document.createElement(tag), {
  1420.               textContent: TRUSTED.createScript(textContent),
  1421.               nonce,
  1422.             }));
  1423.         evalCode.push(']; document.currentScript.remove();');
  1424.         GMAE('script', {textContent: evalCode.join('')});
  1425.         result = (wnd = unsafeWindow)[evalId] ||
  1426.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1427.       }
  1428.       if (result) {
  1429.         for (const [index, fns] of result) {
  1430.           Object.assign(customRules[index], fns);
  1431.         }
  1432.         delete wnd[evalId];
  1433.       } else {
  1434.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1435.       }
  1436.     }
  1437.  
  1438.     // rules that disable previewing
  1439.     const disablers = [
  1440.       dotDomain.endsWith('.stackoverflow.com') && {
  1441.         e: '.post-tag, .post-tag img',
  1442.         s: '',
  1443.       },
  1444.       {
  1445.         u: '||disqus.com/',
  1446.         s: '',
  1447.       },
  1448.     ];
  1449.  
  1450.     // optimization: a rule is created only when on domain
  1451.     const perDomain = [
  1452.       hostname.includes('startpage') && {
  1453.         r: /\boiu=(.+)/,
  1454.         s: '$1',
  1455.         follow: true,
  1456.       },
  1457.       dotDomain.endsWith('.4chan.org') && {
  1458.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1459.         q: '.op .fileText a',
  1460.         css: '#post-preview{display:none}',
  1461.       },
  1462.       hostname.includes('amazon.') && {
  1463.         r: /.+?images\/I\/.+?\./,
  1464.         s: m => {
  1465.           const uh = doc.getElementById('universal-hover');
  1466.           return uh ? '' : m[0] + 'jpg';
  1467.         },
  1468.         css: '#zoomWindow{display:none!important;}',
  1469.       },
  1470.       dotDomain.endsWith('.bing.com') && {
  1471.         e: 'a[m*="murl"]',
  1472.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1473.         s: '$1',
  1474.         html: true,
  1475.       },
  1476.       ...dotDomain.endsWith('.deviantart.com') && [{
  1477.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1478.         s: (m, node) =>
  1479.           $propUp(node, 'data-super-full-img') ||
  1480.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1481.           node.dataset.embedId && node.src,
  1482.       }, {
  1483.         e: '.dev-view-deviation img',
  1484.         s: () => [
  1485.           $('.dev-page-download').href,
  1486.           $('.dev-content-full').src,
  1487.         ].filter(Boolean),
  1488.       }, {
  1489.         e: 'a[data-hook=deviation_link]',
  1490.         q: 'link[as=image]',
  1491.       }] || [],
  1492.       dotDomain.endsWith('.discord.com') && {
  1493.         u: '||discordapp.net/external/',
  1494.         r: /\/https?\/(.+)/,
  1495.         s: '//$1',
  1496.         follow: true,
  1497.       },
  1498.       dotDomain.endsWith('.dropbox.com') && {
  1499.         r: /(.+?&size_mode)=\d+(.*)/,
  1500.         s: '$1=5$2',
  1501.       },
  1502.       dotDomain.endsWith('.facebook.com') && {
  1503.         e: 'a[href*="ref=hovercard"]',
  1504.         s: (m, node) =>
  1505.           'https://www.facebook.com/photo.php?fbid=' +
  1506.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1507.         follow: true,
  1508.       },
  1509.       dotDomain.endsWith('.facebook.com') && {
  1510.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1511.         s: (m, node) =>
  1512.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1513.             decodeURIComponent(m[4]),
  1514.         html: true,
  1515.         follow: true,
  1516.       },
  1517.       dotDomain.endsWith('.flickr.com') &&
  1518.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1519.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1520.         s: m => `https://www.flickr.com/services/rest/?${
  1521.           new URLSearchParams({
  1522.             photo_id: m[1],
  1523.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1524.             method: 'flickr.photos.getSizes',
  1525.             format: 'json',
  1526.             nojsoncallback: 1,
  1527.           }).toString()}`,
  1528.         q: text => JSON.parse(text).sizes.size.pop().source,
  1529.         anonymous: true,
  1530.       },
  1531.       dotDomain.endsWith('.github.com') && {
  1532.         r: new RegExp([
  1533.           /(avatars.+?&s=)\d+/,
  1534.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1535.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1536.         ].map(rx => rx.source).join('|')),
  1537.         s: m => `https://${
  1538.           m[1] ? `${m[1]}460` :
  1539.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1540.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1541.         }`,
  1542.       },
  1543.       isGoogleImages && {
  1544.         e: 'a[href*="imgres?imgurl="] img',
  1545.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1546.         follow: true,
  1547.       },
  1548.       isGoogleImages && {
  1549.         e: '[data-tbnid] a:not([href])',
  1550.         s: (m, a) => {
  1551.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1552.           new MutationObserver((_, mo) => {
  1553.             mo.disconnect();
  1554.             App.isEnabled = true;
  1555.             a.alt = a2.innerText;
  1556.             const {left, top} = a.getBoundingClientRect();
  1557.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1558.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1559.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1560.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1561.         },
  1562.       },
  1563.       dotDomain.endsWith('.instagram.com') && {
  1564.         e: 'a[href*="/p/"],' +
  1565.           'article [role="button"][tabindex="0"],' +
  1566.           'article [role="button"][tabindex="0"] div',
  1567.         s: (m, node, rule) => {
  1568.           let data, a, n, img, src;
  1569.           if (location.pathname.startsWith('/p/')) {
  1570.             img = $('img[srcset], video', node.parentNode);
  1571.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1572.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1573.           }
  1574.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1575.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1576.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1577.           }
  1578.           const numPics = a && tryCatch(() => data.edge_sidecar_to_children.edges.length);
  1579.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1580.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1581.           rule.follow = !data && !rule.g;
  1582.           rule._data = data;
  1583.           rule._img = img;
  1584.           return (
  1585.             !a && !src ? false :
  1586.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1587.                 data.video_url || data.display_url);
  1588.         },
  1589.         c: (html, doc, node, rule) =>
  1590.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1591.         follow: true,
  1592.         _q: 'meta[property="og:video"]',
  1593.         _g(text, doc, url, m, rule) {
  1594.           const media = JSON.parse(text).graphql.shortcode_media;
  1595.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1596.             url: e.node.video_url || e.node.display_url,
  1597.           }));
  1598.           items.title = tryCatch(rule._getCaption, media) || '';
  1599.           return items;
  1600.         },
  1601.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1602.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1603.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1604.       },
  1605.       ...dotDomain.endsWith('.reddit.com') && [{
  1606.         u: '||i.reddituploads.com/',
  1607.       }, {
  1608.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1609.         s: (m, node) => $propUp(node, 'data-url'),
  1610.       }, {
  1611.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1612.         s: 'https://i$1',
  1613.       }] || [],
  1614.       dotDomain.endsWith('.tumblr.com') && {
  1615.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1616.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1617.         follow: true,
  1618.       },
  1619.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1620.         e: 'a.media-item, a.js-media-image-link',
  1621.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1622.         follow: true,
  1623.       },
  1624.       dotDomain.endsWith('.twitter.com') && {
  1625.         e: '.grid-tweet > .media-overlay',
  1626.         s: (m, node) => node.previousElementSibling.src,
  1627.         follow: true,
  1628.       },
  1629.     ];
  1630.  
  1631.     const main = [
  1632.       {
  1633.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1634.         s: '$1',
  1635.         follow: true,
  1636.         onerror: 'skip',
  1637.       },
  1638.       {
  1639.         u: [
  1640.           '||500px.com/photo/',
  1641.           '||cl.ly/',
  1642.           '||cweb-pix.com/',
  1643.           '//ibb.co/',
  1644.           '||imgcredit.xyz/image/',
  1645.         ],
  1646.         r: /\.\w+\/.+/,
  1647.         q: 'meta[property="og:image"]',
  1648.       },
  1649.       {
  1650.         u: 'attachment.php',
  1651.         r: /attachment\.php.+attachmentid/,
  1652.       },
  1653.       {
  1654.         u: '||abload.de/image',
  1655.         q: '#image',
  1656.       },
  1657.       {
  1658.         u: '||deviantart.com/art/',
  1659.         s: (m, node) =>
  1660.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1661.             '' :
  1662.             m.input,
  1663.         q: [
  1664.           '#download-button[href*=".jpg"]',
  1665.           '#download-button[href*=".jpeg"]',
  1666.           '#download-button[href*=".gif"]',
  1667.           '#download-button[href*=".png"]',
  1668.           '#gmi-ResViewSizer_fullimg',
  1669.           'img.dev-content-full',
  1670.         ],
  1671.       },
  1672.       {
  1673.         u: '||dropbox.com/s',
  1674.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1675.         q: (text, doc) =>
  1676.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1677.       },
  1678.       {
  1679.         r: /[./]ebay\.[^/]+\/itm\//,
  1680.         q: text =>
  1681.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1682.             .replace(/~~60_\d+/, '~~60_57'),
  1683.       },
  1684.       {
  1685.         u: '||i.ebayimg.com/',
  1686.         s: (m, node) =>
  1687.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1688.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1689.       },
  1690.       {
  1691.         u: '||fastpic.',
  1692.         e: 'a[href*="fastpic"][href*=".html"]',
  1693.         s: m => m[0].replace('http:', 'https:').replace('fastpic.ru', 'fastpic.org'),
  1694.         q: 'img[src*="/big/"]',
  1695.       },
  1696.       {
  1697.         u: '||facebook.com/',
  1698.         r: /photo\.php|[^/]+\/photos\//,
  1699.         s: (m, node) =>
  1700.           node.id === 'fbPhotoImage' ? false :
  1701.             /gradient\.png$/.test(m.input) ? '' :
  1702.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1703.         q: [
  1704.           'div + span > a:first-child:not([href*="tag_faces"])',
  1705.           'div + span > a[href*="tag_faces"] ~ a',
  1706.         ],
  1707.         rect: '#fbProfileCover',
  1708.       },
  1709.       {
  1710.         u: '||fbcdn.',
  1711.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1712.         s: m =>
  1713.           dotDomain.endsWith('.facebook.com') &&
  1714.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1715.           false,
  1716.         manual: true,
  1717.       },
  1718.       {
  1719.         u: ['||fbcdn-', 'fbcdn.net/'],
  1720.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1721.         s: (m, node) => {
  1722.           if (node.id === 'fbPhotoImage') {
  1723.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1724.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1725.           }
  1726.           if (m[4])
  1727.             return false;
  1728.           const pn = node.parentNode;
  1729.           if (pn.outerHTML.includes('/hovercard/'))
  1730.             return '';
  1731.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1732.             return false;
  1733.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1734.         },
  1735.         rect: '.photoWrap',
  1736.       },
  1737.       {
  1738.         u: '||flickr.com/photos/',
  1739.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1740.         s: m =>
  1741.           m.input.indexOf('/sizes/') < 0 ?
  1742.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1743.             false,
  1744.         q: (text, doc) => {
  1745.           const links = $$('.sizes-list a', doc);
  1746.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1747.         },
  1748.         follow: true,
  1749.       },
  1750.       {
  1751.         u: '||flickr.com/photos/',
  1752.         r: /\/sizes\//,
  1753.         q: '#allsizes-photo > img',
  1754.       },
  1755.       {
  1756.         u: '||gfycat.com/',
  1757.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1758.         s: 'https://$1$3',
  1759.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1760.       },
  1761.       {
  1762.         u: [
  1763.           '||googleusercontent.com/proxy',
  1764.           '||googleusercontent.com/gadgets/proxy',
  1765.         ],
  1766.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1767.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1768.       },
  1769.       {
  1770.         u: [
  1771.           '||googleusercontent.com/',
  1772.           '||ggpht.com/',
  1773.         ],
  1774.         s: m => m.input.includes('webcache.') ? '' :
  1775.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1776.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1777.       },
  1778.       {
  1779.         u: '||gravatar.com/',
  1780.         r: /([a-z0-9]{32})/,
  1781.         s: 'https://gravatar.com/avatar/$1?s=200',
  1782.       },
  1783.       {
  1784.         u: '//gyazo.com/',
  1785.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1786.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1787.         _q: 'meta[name="twitter:image"]',
  1788.       },
  1789.       {
  1790.         u: '||hostingkartinok.com/show-image.php',
  1791.         q: '.image img',
  1792.       },
  1793.       {
  1794.         u: [
  1795.           '||imagecurl.com/images/',
  1796.           '||imagecurl.com/viewer.php',
  1797.         ],
  1798.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1799.         s: 'https://imagecurl.com/images/$1$2$3',
  1800.       },
  1801.       {
  1802.         u: '||imagebam.com/image/',
  1803.         q: 'meta[property="og:image"]',
  1804.         tabfix: true,
  1805.         xhr: hostname.includes('planetsuzy'),
  1806.       },
  1807.       {
  1808.         u: '||imageban.ru/thumbs',
  1809.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1810.         s: '$1out$2/$3/$4',
  1811.       },
  1812.       {
  1813.         u: [
  1814.           '||imageban.ru/show',
  1815.           '||imageban.net/show',
  1816.           '||ibn.im/',
  1817.         ],
  1818.         q: '#img_main',
  1819.       },
  1820.       {
  1821.         u: '||imageshack.us/img',
  1822.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1823.         s: 'https://$2/download/$1/$3$4',
  1824.       },
  1825.       {
  1826.         u: '||imageshack.us/i/',
  1827.         q: '#share-dl',
  1828.       },
  1829.       {
  1830.         u: '||imageteam.org/img',
  1831.         q: 'img[alt="image"]',
  1832.       },
  1833.       {
  1834.         u: [
  1835.           '||imagetwist.com/',
  1836.           '||imageshimage.com/',
  1837.         ],
  1838.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1839.         q: 'img.pic',
  1840.         xhr: true,
  1841.       },
  1842.       {
  1843.         u: '||imageupper.com/i/',
  1844.         q: '#img',
  1845.         xhr: true,
  1846.       },
  1847.       {
  1848.         u: '||imagevenue.com/',
  1849.         q: 'a[data-toggle="full"] img',
  1850.       },
  1851.       {
  1852.         u: '||imagezilla.net/show/',
  1853.         q: '#photo',
  1854.         xhr: true,
  1855.       },
  1856.       {
  1857.         u: [
  1858.           '||images-na.ssl-images-amazon.com/images/',
  1859.           '||media-imdb.com/images/',
  1860.         ],
  1861.         r: /images\/.+?\.jpg/,
  1862.         s: '/V1\\.?_.+?\\.//g',
  1863.       },
  1864.       {
  1865.         u: '||imgbox.com/',
  1866.         r: /\.com\/([a-z0-9]+)$/i,
  1867.         q: '#img',
  1868.         xhr: hostname !== 'imgbox.com',
  1869.       },
  1870.       {
  1871.         u: '||imgclick.net/',
  1872.         r: /\.net\/(\w+)/,
  1873.         q: 'img.pic',
  1874.         xhr: true,
  1875.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1876.       },
  1877.       {
  1878.         u: '.imgcredit.xyz/',
  1879.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1880.         s: ['https$1$2', 'https$1.png'],
  1881.       },
  1882.       {
  1883.         u: [
  1884.           '||imgflip.com/i/',
  1885.           '||imgflip.com/gif/',
  1886.         ],
  1887.         r: /\/(i|gif)\/([^/?#]+)/,
  1888.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1889.       },
  1890.       {
  1891.         u: [
  1892.           '||imgur.com/a/',
  1893.           '||imgur.com/gallery/',
  1894.         ],
  1895.         g: async (text, doc, url, m, rule, node, cb) => {
  1896.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1897.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1898.           const images = ((info || 0).data || 0).images;
  1899.           const items = [];
  1900.           for (const img of images || []) {
  1901.             u = `https://i.imgur.com/${img.hash}`;
  1902.             items.push({
  1903.               url: img.ext === '.gif' && img.animated !== false ?
  1904.                 [`${u}.webm`, `${u}.mp4`, u] :
  1905.                 u + img.ext,
  1906.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1907.             });
  1908.           }
  1909.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1910.             items.title = info.title;
  1911.           cb(items);
  1912.         },
  1913.         css: '.post > .hover { display:none!important; }',
  1914.       },
  1915.       {
  1916.         u: '||imgur.com/',
  1917.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1918.         s: 'gallery',
  1919.         g: (text, doc, url, m) =>
  1920.           m[2].split(',').map(id => ({
  1921.             url: `https://i.${m[1]}${id}.jpg`,
  1922.           })),
  1923.       },
  1924.       {
  1925.         u: '||imgur.com/',
  1926.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1927.         s: (m, node) => {
  1928.           if (/memegen|random|register|search|signin/.test(m.input))
  1929.             return '';
  1930.           const a = node.closest('a');
  1931.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1932.             return false;
  1933.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1934.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1935.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1936.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1937.           return ext === 'webm' ?
  1938.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1939.             u + ext;
  1940.         },
  1941.       },
  1942.       {
  1943.         u: [
  1944.           '||instagr.am/p/',
  1945.           '||instagram.com/p/',
  1946.         ],
  1947.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1948.         q: text => {
  1949.           const m = JSON.parse(text).graphql.shortcode_media;
  1950.           return m.video_url || m.display_url;
  1951.         },
  1952.         rect: 'div.PhotoGridMediaItem',
  1953.         c: text => {
  1954.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1955.           return m === undefined ? '(no caption)' : m.node.text;
  1956.         },
  1957.       },
  1958.       {
  1959.         u: [
  1960.           '||livememe.com/',
  1961.           '||lvme.me/',
  1962.         ],
  1963.         r: /\.\w+\/([^.]+)$/,
  1964.         s: 'http://i.lvme.me/$1.jpg',
  1965.       },
  1966.       {
  1967.         u: '||lostpic.net/image',
  1968.         q: '.image-viewer-image img',
  1969.       },
  1970.       {
  1971.         u: '||makeameme.org/meme/',
  1972.         r: /\/meme\/([^/?#]+)/,
  1973.         s: 'https://media.makeameme.org/created/$1.jpg',
  1974.       },
  1975.       {
  1976.         u: '||photobucket.com/',
  1977.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1978.         s: 'https://i$1$3',
  1979.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1980.       },
  1981.       {
  1982.         u: '||piccy.info/view3/',
  1983.         r: /(.+?\/view3)\/(.*)\//,
  1984.         s: '$1/$2/orig/',
  1985.         q: '#mainim',
  1986.       },
  1987.       {
  1988.         u: '||pimpandhost.com/image/',
  1989.         r: /(.+?\/image\/[0-9]+)/,
  1990.         s: '$1?size=original',
  1991.         q: 'img.original',
  1992.       },
  1993.       {
  1994.         u: [
  1995.           '||pixroute.com/',
  1996.           '||imgspice.com/',
  1997.         ],
  1998.         r: /\.html$/,
  1999.         q: 'img[id]',
  2000.         xhr: true,
  2001.       },
  2002.       {
  2003.         u: '||postima',
  2004.         r: /postima?ge?\.org\/image\/\w+/,
  2005.         q: [
  2006.           'a[href*="dl="]',
  2007.           '#main-image',
  2008.         ],
  2009.       },
  2010.       {
  2011.         u: [
  2012.           '||prntscr.com/',
  2013.           '||prnt.sc/',
  2014.         ],
  2015.         r: /\.\w+\/.+/,
  2016.         q: 'meta[property="og:image"]',
  2017.         xhr: true,
  2018.       },
  2019.       {
  2020.         u: '||radikal.ru/',
  2021.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2022.         s: (m, node, rule) =>
  2023.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2024.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2025.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2026.       },
  2027.       {
  2028.         u: '||tumblr.com',
  2029.         r: /_500\.jpg/,
  2030.         s: ['/_500/_1280/', ''],
  2031.       },
  2032.       {
  2033.         u: '||twimg.com/media/',
  2034.         r: /.+?format=(jpe?g|png|gif)/i,
  2035.         s: '$0&name=orig',
  2036.       },
  2037.       {
  2038.         u: '||twimg.com/media/',
  2039.         r: /.+?\.(jpe?g|png|gif)/i,
  2040.         s: '$0:orig',
  2041.       },
  2042.       {
  2043.         u: '||twimg.com/1/proxy',
  2044.         r: /t=([^&_]+)/i,
  2045.         s: m => atob(m[1]).match(/http.+/),
  2046.       },
  2047.       {
  2048.         u: '||twimg.com/',
  2049.         r: /\/profile_images/i,
  2050.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2051.       },
  2052.       {
  2053.         u: '||pic.twitter.com/',
  2054.         r: /\.com\/[a-z0-9]+/i,
  2055.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2056.         follow: true,
  2057.       },
  2058.       {
  2059.         u: '||twitpic.com/',
  2060.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2061.         s: 'https://twitpic.com/show/large/$2',
  2062.       },
  2063.       {
  2064.         u: '||wiki',
  2065.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  2066.         s: '/\\/thumb(?=\\/)|' +
  2067.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  2068.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  2069.         xhr: !hostname.includes('wiki'),
  2070.       },
  2071.       {
  2072.         u: '||ytimg.com/vi/',
  2073.         r: /(.+?\/vi\/[^/]+)/,
  2074.         s: '$1/0.jpg',
  2075.         rect: '.video-list-item',
  2076.       },
  2077.       {
  2078.         u: '/viewer.php?file=',
  2079.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2080.         s: '$1/images/$2',
  2081.         xhr: true,
  2082.       },
  2083.       {
  2084.         u: '/thumb_',
  2085.         r: /\/albums.+\/thumb_[^/]/,
  2086.         s: '/thumb_//',
  2087.       },
  2088.       {
  2089.         u: [
  2090.           '.th.jp',
  2091.           '.th.gif',
  2092.           '.th.png',
  2093.         ],
  2094.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2095.         s: '$1$2',
  2096.         follow: true,
  2097.       },
  2098.       {
  2099.         r: RX_MEDIA_URL,
  2100.       },
  2101.     ];
  2102.  
  2103.     /** @type mpiv.HostRule[] */
  2104.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2105.       .forEach(rule => {
  2106.         if (Array.isArray(rule.e))
  2107.           rule.e = rule.e.join(',');
  2108.       });
  2109.   },
  2110.  
  2111.   format(rule, {expand} = {}) {
  2112.     const s = Util.stringify(rule, null, ' ');
  2113.     return expand ?
  2114.       /* {"a": ...,
  2115.           "b": ...,
  2116.           "c": ...
  2117.          } */
  2118.       s.replace(/^{\s+/g, '{') :
  2119.       /* {"a": ..., "b": ..., "c": ...} */
  2120.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2121.   },
  2122.  
  2123.   fromElement(el) {
  2124.     const text = el.textContent.trim();
  2125.     if (text.startsWith('{') &&
  2126.         text.endsWith('}') &&
  2127.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2128.       const rule = tryCatch(JSON.parse, text);
  2129.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2130.     }
  2131.   },
  2132.  
  2133.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2134.  
  2135.   /** @returns mpiv.HostRule | Error | false | undefined */
  2136.   parse(rule) {
  2137.     const isBatchOp = this instanceof Map;
  2138.     try {
  2139.       if (typeof rule === 'string')
  2140.         rule = JSON.parse(rule);
  2141.       if ('d' in rule && typeof rule.d !== 'string')
  2142.         rule.d = undefined;
  2143.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2144.         return false;
  2145.       if ('e' in rule) {
  2146.         let {e} = rule;
  2147.         if (typeof e === 'string') {
  2148.           e = e.trim();
  2149.         } else if (
  2150.           Array.isArray(e) && !e.every((s, i) => typeof s === 'string' && (e[i] = s.trim())) ||
  2151.           e && !Object.entries(e).filter(Ruler.isValidE2).length
  2152.         ) {
  2153.           throw new Error('Invalid syntax for "e". Examples: ' +
  2154.             '"e": ".image" or ' +
  2155.             '"e": [".image1", ".image2"] or ' +
  2156.             '"e": {".parent": ".image"} or ' +
  2157.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2158.         }
  2159.         if (isBatchOp) rule.e = e || undefined;
  2160.       }
  2161.       let compileTo = isBatchOp ? rule : {};
  2162.       if (rule.r)
  2163.         compileTo.r = new RegExp(rule.r, 'i');
  2164.       if (App.NOP)
  2165.         compileTo = {};
  2166.       for (const key of Object.keys(FN_ARGS)) {
  2167.         if (RX_HAS_CODE.test(rule[key])) {
  2168.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2169.           if (fn !== App.NOP || !isBatchOp) {
  2170.             compileTo[key] = fn;
  2171.           } else if (isBatchOp) {
  2172.             this.set(rule, 'unsafe-eval');
  2173.           }
  2174.         }
  2175.       }
  2176.       return rule;
  2177.     } catch (err) {
  2178.       if (isBatchOp) {
  2179.         this.set(rule, err);
  2180.         return rule;
  2181.       } else {
  2182.         return err;
  2183.       }
  2184.     }
  2185.   },
  2186.  
  2187.   runC(text, doc = document) {
  2188.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2189.     ai.caption = fn(text, doc);
  2190.   },
  2191.  
  2192.   runCHandler: {
  2193.     function: (text, doc) =>
  2194.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2195.     string: (text, doc) => {
  2196.       const el = $many(ai.rule.c, doc);
  2197.       return !el ? '' :
  2198.         el.getAttribute('content') ||
  2199.         el.getAttribute('title') ||
  2200.         el.textContent;
  2201.     },
  2202.     default: () =>
  2203.       (ai.tooltip || 0).text ||
  2204.       ai.node.alt ||
  2205.       $propUp(ai.node, 'title') ||
  2206.       Remoting.getFileName(
  2207.         ai.node.tagName === (ai.popup || 0).tagName
  2208.           ? ai.url
  2209.           : ai.node.src || $propUp(ai.node, 'href')),
  2210.   },
  2211.  
  2212.   runQ(text, doc, docUrl) {
  2213.     let url;
  2214.     if (isFunction(ai.rule.q)) {
  2215.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2216.       if (Array.isArray(url)) {
  2217.         ai.urls = url.slice(1);
  2218.         url = url[0];
  2219.       }
  2220.     } else {
  2221.       const el = $many(ai.rule.q, doc);
  2222.       url = Remoting.findImageUrl(el, docUrl);
  2223.     }
  2224.     return url;
  2225.   },
  2226.  
  2227.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2228.   runE(rule, node) {
  2229.     const {e} = rule;
  2230.     if (typeof e === 'string')
  2231.       return node.matches(e);
  2232.     let p, img, res, info;
  2233.     for (const selParent in e) {
  2234.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2235.         if (img === node)
  2236.           res = true;
  2237.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2238.           return info;
  2239.       }
  2240.     }
  2241.     return res;
  2242.   },
  2243.  
  2244.   /** @returns {?Array} if falsy then the rule should be skipped */
  2245.   runS(node, rule, m) {
  2246.     let urls = [];
  2247.     for (const s of ensureArray(rule.s))
  2248.       urls.push(
  2249.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2250.           isFunction(s) ? s(m, node, rule) :
  2251.             s);
  2252.     if (rule.q && urls.length > 1) {
  2253.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2254.       return;
  2255.     }
  2256.     if (Array.isArray(urls[0]))
  2257.       urls = urls[0];
  2258.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2259.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2260.   },
  2261.  
  2262.   /** @returns {boolean} */
  2263.   runU(rule, url) {
  2264.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2265.     return u.fn.call(u.data, url);
  2266.   },
  2267.  
  2268.   substituteSingle(s, m) {
  2269.     if (!m || m.input == null) return s;
  2270.     if (s.startsWith('/') && !s.startsWith('//')) {
  2271.       const mid = s.search(/[^\\]\//) + 1;
  2272.       const end = s.lastIndexOf('/');
  2273.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2274.       return m.input.replace(re, s.slice(mid + 1, end));
  2275.     }
  2276.     if (m.length && s.includes('$')) {
  2277.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2278.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2279.         for (let i = maxLength; i >= 0; i--) {
  2280.           const part = num.slice(0, i) | 0;
  2281.           if (part < m.length)
  2282.             return (m[part] || '') + num.slice(i);
  2283.         }
  2284.         return text;
  2285.       });
  2286.     }
  2287.     return s;
  2288.   },
  2289.  
  2290.   toggle(rule, prop, condition) {
  2291.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2292.     return condition;
  2293.   },
  2294. };
  2295.  
  2296. const RuleMatcher = {
  2297.  
  2298.   /** @returns {Object} */
  2299.   adaptiveFind(node, opts) {
  2300.     const tn = node.tagName;
  2301.     const src = node.currentSrc || node.src;
  2302.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2303.     let a, info, url;
  2304.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2305.     if (tn !== 'A') {
  2306.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2307.       info = RuleMatcher.find(url, node, opts);
  2308.     }
  2309.     if (!info && (a = node.closest('A'))) {
  2310.       const ds = a.dataset;
  2311.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2312.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2313.       url = !url.startsWith('data:') && url;
  2314.       info = RuleMatcher.find(url, a, opts);
  2315.     }
  2316.     if (!info && isPic)
  2317.       info = {node, rule: {}, url: src};
  2318.     return info;
  2319.   },
  2320.  
  2321.   /** @returns ?mpiv.RuleMatchInfo */
  2322.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2323.     const tn = node.tagName;
  2324.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2325.     const isPicOrLink = isPic || tn === 'A';
  2326.     let m, html, info;
  2327.     for (const rule of rules || Ruler.rules) {
  2328.       if (skipRules && skipRules.includes(rule) ||
  2329.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2330.           rule.e && !rules && !(info = Ruler.runE(rule, node)))
  2331.         continue;
  2332.       if (info && info.url)
  2333.         return info;
  2334.       if (rule.r)
  2335.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2336.           ? rule.r.exec(html || (html = node.outerHTML))
  2337.           : url && rule.r.exec(url);
  2338.       else if (url)
  2339.         m = Object.assign([url], {index: 0, input: url});
  2340.       else
  2341.         m = [];
  2342.       if (!m)
  2343.         continue;
  2344.       if (rule.s === '')
  2345.         return {};
  2346.       let hasS = rule.s != null;
  2347.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2348.       // but we'll only allow it to match rules without 's' in the nested find call
  2349.       if (isPic && !hasS && !skipRules)
  2350.         continue;
  2351.       hasS &= rule.s !== 'gallery';
  2352.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2353.       if (urls)
  2354.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2355.     }
  2356.   },
  2357.  
  2358.   /** @returns ?mpiv.RuleMatchInfo */
  2359.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2360.     let info;
  2361.     let url = `${urls[0]}`;
  2362.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2363.     if (url)
  2364.       url = Util.rel2abs(url);
  2365.     else
  2366.       info = {};
  2367.     if (follow)
  2368.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2369.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2370.       const xhr = cfg.xhr && rule.xhr;
  2371.       info = {
  2372.         match,
  2373.         node,
  2374.         rule,
  2375.         url,
  2376.         urls: urls.length > 1 ? urls.slice(1) : null,
  2377.         gallery: rule.g && Gallery.makeParser(rule.g),
  2378.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2379.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2380.       };
  2381.     }
  2382.     return info;
  2383.   },
  2384.  
  2385.   isFollowableUrl(url, rule) {
  2386.     const f = rule.follow;
  2387.     return isFunction(f) ? f(url) : f;
  2388.   },
  2389. };
  2390.  
  2391. const Remoting = {
  2392.  
  2393.   gmXhr(url, opts = {}) {
  2394.     if (ai.req)
  2395.       tryCatch.call(ai.req, ai.req.abort);
  2396.     return new Promise((resolve, reject) => {
  2397.       const {anonymous} = ai.rule || {};
  2398.       ai.req = GM.xmlHttpRequest({
  2399.         url,
  2400.         anonymous,
  2401.         withCredentials: !anonymous,
  2402.         method: 'GET',
  2403.         timeout: 30e3,
  2404.         ...opts,
  2405.         onload: done,
  2406.         onerror: done,
  2407.         ontimeout() {
  2408.           ai.req = null;
  2409.           reject(`Timeout fetching ${url}`);
  2410.         },
  2411.       });
  2412.       function done(r) {
  2413.         ai.req = null;
  2414.         if (r.status < 400 && !r.error)
  2415.           resolve(r);
  2416.         else
  2417.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2418.       }
  2419.     });
  2420.   },
  2421.  
  2422.   async getDoc(url) {
  2423.     if (!url) {
  2424.       // current document
  2425.       return {
  2426.         doc,
  2427.         finalUrl: location.href,
  2428.         responseText: doc.documentElement.outerHTML,
  2429.       };
  2430.     }
  2431.     const r = await (!ai.post ?
  2432.       Remoting.gmXhr(url) :
  2433.       Remoting.gmXhr(url, {
  2434.         method: 'POST',
  2435.         data: ai.post,
  2436.         headers: {
  2437.           'Content-Type': 'application/x-www-form-urlencoded',
  2438.           'Referer': url,
  2439.         },
  2440.       }));
  2441.     r.doc = $parseHtml(r.responseText);
  2442.     return r;
  2443.   },
  2444.  
  2445.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2446.     ai.bufBar = false;
  2447.     ai.bufStart = now();
  2448.     const response = await Remoting.gmXhr(url, {
  2449.       responseType: 'blob',
  2450.       headers: {
  2451.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2452.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2453.       },
  2454.       onprogress: Remoting.getImageProgress,
  2455.     });
  2456.     Bar.set(false);
  2457.     const type = Remoting.guessMimeType(response);
  2458.     let b = response.response;
  2459.     if (!b) throw 'Empty response';
  2460.     if (b.type !== type)
  2461.       b = b.slice(0, b.size, type);
  2462.     const res = xhr === 'blob'
  2463.       ? (ai.blobUrl = URL.createObjectURL(b))
  2464.       : await Remoting.blobToDataUrl(b);
  2465.     return [res, type.startsWith('video')];
  2466.   },
  2467.  
  2468.   getImageProgress(e) {
  2469.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2470.       ai.bufBar = true;
  2471.     if (ai.bufBar) {
  2472.       const pct = e.loaded / e.total * 100 | 0;
  2473.       const size = e.total / 1024 | 0;
  2474.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2475.     }
  2476.   },
  2477.  
  2478.   async findRedirect() {
  2479.     try {
  2480.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2481.         method: 'HEAD',
  2482.         headers: {
  2483.           'Referer': location.href.split('#', 1)[0],
  2484.         },
  2485.       });
  2486.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2487.       if (!info || !info.url)
  2488.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2489.       Object.assign(ai, info);
  2490.       App.startSingle();
  2491.     } catch (e) {
  2492.       App.handleError(e);
  2493.     }
  2494.   },
  2495.  
  2496.   async saveFile() {
  2497.     const url = ai.popup.src || ai.popup.currentSrc;
  2498.     let name = Remoting.getFileName(ai.imageUrl || url);
  2499.     if (!name.includes('.'))
  2500.       name += '.jpg';
  2501.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2502.       $create('a', {href: url, download: name})
  2503.         .dispatchEvent(new MouseEvent('click'));
  2504.     } else {
  2505.       Status.set('+loading');
  2506.       const onload = () => Status.set('-loading');
  2507.       const gmDL = typeof GM_download === 'function';
  2508.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2509.         url,
  2510.         name,
  2511.         headers: {Referer: url},
  2512.         method: 'get', // polyfilling GM_download
  2513.         responseType: 'blob', // polyfilling GM_download
  2514.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2515.         onerror: e => {
  2516.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2517.           onload();
  2518.         },
  2519.         onprogress: Remoting.getImageProgress,
  2520.         onload({response}) {
  2521.           onload();
  2522.           if (!gmDL) { // polyfilling GM_download
  2523.             const a = Object.assign(document.createElement('a'), {
  2524.               href: URL.createObjectURL(response),
  2525.               download: name,
  2526.             });
  2527.             a.dispatchEvent(new MouseEvent('click'));
  2528.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2529.           }
  2530.         },
  2531.       });
  2532.     }
  2533.   },
  2534.  
  2535.   getFileName(url) {
  2536.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2537.   },
  2538.  
  2539.   blobToDataUrl(blob) {
  2540.     return new Promise((resolve, reject) => {
  2541.       const fr = new FileReader();
  2542.       fr.onload = () => resolve(fr.result);
  2543.       fr.onerror = reject;
  2544.       fr.readAsDataURL(blob);
  2545.     });
  2546.   },
  2547.  
  2548.   guessMimeType({responseHeaders, finalUrl}) {
  2549.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2550.         !RegExp.$1.includes('text/plain'))
  2551.       return RegExp.$1;
  2552.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2553.     switch (ext.toLowerCase()) {
  2554.       case 'bmp': return 'image/bmp';
  2555.       case 'gif': return 'image/gif';
  2556.       case 'jpe': return 'image/jpeg';
  2557.       case 'jpeg': return 'image/jpeg';
  2558.       case 'jpg': return 'image/jpeg';
  2559.       case 'mp4': return 'video/mp4';
  2560.       case 'png': return 'image/png';
  2561.       case 'svg': return 'image/svg+xml';
  2562.       case 'tif': return 'image/tiff';
  2563.       case 'tiff': return 'image/tiff';
  2564.       case 'webm': return 'video/webm';
  2565.       default: return 'application/octet-stream';
  2566.     }
  2567.   },
  2568.  
  2569.   findImageUrl(n, url) {
  2570.     if (!n) return;
  2571.     let html;
  2572.     const path =
  2573.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2574.       n.getAttribute('src') ||
  2575.       n.getAttribute('data-m4v') ||
  2576.       n.getAttribute('href') ||
  2577.       n.getAttribute('content') ||
  2578.       (html = n.outerHTML).includes('http') &&
  2579.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2580.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2581.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2582.   },
  2583. };
  2584.  
  2585. const Status = {
  2586.  
  2587.   set(status) {
  2588.     if (!status && !cfg.globalStatus) {
  2589.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2590.       return;
  2591.     }
  2592.     const prefix = cfg.globalStatus ? PREFIX : '';
  2593.     const action = status && /^[+-]/.test(status) && status[0];
  2594.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2595.     const el = cfg.globalStatus ? doc.documentElement :
  2596.       name === 'edge' ? ai.popup :
  2597.         ai.node;
  2598.     if (!el) return;
  2599.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2600.     const oldValue = (el.getAttribute(attr) || '').trim();
  2601.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2602.     switch (action) {
  2603.       case '-':
  2604.         cls.delete(name);
  2605.         break;
  2606.       case false:
  2607.         for (const c of cls)
  2608.           if (c.startsWith(prefix) && c !== name)
  2609.             cls.delete(c);
  2610.       // fallthrough to +
  2611.       case '+':
  2612.         if (name)
  2613.           cls.add(name);
  2614.         break;
  2615.     }
  2616.     const newValue = [...cls].join(' ');
  2617.     if (newValue !== oldValue)
  2618.       el.setAttribute(attr, newValue);
  2619.   },
  2620.  
  2621.   loading(force) {
  2622.     if (!force) {
  2623.       clearTimeout(ai.timerStatus);
  2624.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2625.     } else if (!ai.popupLoaded) {
  2626.       Status.set('+loading');
  2627.     }
  2628.   },
  2629. };
  2630.  
  2631. const UrlMatcher = (() => {
  2632.   // string-to-regexp escaped chars
  2633.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2634.   // rx for '^' symbol in simple url match
  2635.   const RX_SEP = /[^\w%._-]/y;
  2636.   const RXS_SEP = RX_SEP.source;
  2637.   return match => {
  2638.     const results = [];
  2639.     for (const s of ensureArray(match)) {
  2640.       const pinDomain = s.startsWith('||');
  2641.       const pinStart = !pinDomain && s.startsWith('|');
  2642.       const endSep = s.endsWith('^');
  2643.       let fn;
  2644.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2645.       if (needle.includes('^')) {
  2646.         let plain = '';
  2647.         for (const part of needle.split('^'))
  2648.           if (part.length > plain.length)
  2649.             plain = part;
  2650.         const rx = new RegExp(
  2651.           (pinStart ? '^' : '') +
  2652.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2653.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2654.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2655.         needle = [plain, rx];
  2656.         fn = regexp;
  2657.       } else if (pinStart) {
  2658.         fn = endSep ? equals : starts;
  2659.       } else if (pinDomain) {
  2660.         const slashPos = needle.indexOf('/');
  2661.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2662.         needle = [needle, domain, slashPos > 0, endSep];
  2663.         fn = startsDomainPrescreen;
  2664.       } else if (endSep) {
  2665.         fn = ends;
  2666.       } else {
  2667.         fn = has;
  2668.       }
  2669.       results.push({fn, data: needle});
  2670.     }
  2671.     return results.length > 1 ?
  2672.       {fn: checkArray, data: results} :
  2673.       results[0];
  2674.   };
  2675.   function checkArray(s) {
  2676.     return this.some(checkArrayItem, s);
  2677.   }
  2678.   function checkArrayItem(item) {
  2679.     return item.fn.call(item.data, this);
  2680.   }
  2681.   function ends(s) {
  2682.     return s.endsWith(this) || (
  2683.       s.length > this.length &&
  2684.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2685.       endsWithSep(s));
  2686.   }
  2687.   function endsWithSep(s, pos = s.length - 1) {
  2688.     RX_SEP.lastIndex = pos;
  2689.     return RX_SEP.test(s);
  2690.   }
  2691.   function equals(s) {
  2692.     return s.startsWith(this) && (
  2693.       s.length === this.length ||
  2694.       s.length === this.length + 1 && endsWithSep(s));
  2695.   }
  2696.   function has(s) {
  2697.     return s.includes(this);
  2698.   }
  2699.   function regexp(s) {
  2700.     return s.includes(this[0]) && this[1].test(s);
  2701.   }
  2702.   function starts(s) {
  2703.     return s.startsWith(this);
  2704.   }
  2705.   function startsDomainPrescreen(url) {
  2706.     return url.includes(this[0]) && startsDomain.call(this, url);
  2707.   }
  2708.   function startsDomain(url) {
  2709.     let hostStart = url.indexOf('//');
  2710.     if (hostStart && url[hostStart - 1] !== ':')
  2711.       return;
  2712.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2713.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2714.     const [needle, domain, pinDomainEnd, endSep] = this;
  2715.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2716.     for (; ; start++) {
  2717.       start = host.indexOf(domain, start);
  2718.       if (start < 0)
  2719.         return;
  2720.       if (!start || host[start - 1] === '.')
  2721.         break;
  2722.     }
  2723.     start += hostStart;
  2724.     if (url.lastIndexOf(needle, start) !== start)
  2725.       return;
  2726.     const end = start + needle.length;
  2727.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2728.   }
  2729. })();
  2730.  
  2731. const Util = {
  2732.  
  2733.   addStyle(name, css) {
  2734.     const id = `${PREFIX}style:${name}`;
  2735.     const el = doc.getElementById(id) ||
  2736.                css && $create('style', {id});
  2737.     if (!el) return;
  2738.     if (el.textContent !== css)
  2739.       el.textContent = css;
  2740.     if (el.parentElement !== doc.head)
  2741.       doc.head.appendChild(el);
  2742.     return el;
  2743.   },
  2744.  
  2745.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2746.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2747.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2748.   },
  2749.  
  2750.   decodeHtmlEntities(s) {
  2751.     return s
  2752.       .replace(/&quot;/g, '"')
  2753.       .replace(/&apos;/g, '\'')
  2754.       .replace(/&lt;/g, '<')
  2755.       .replace(/&gt;/g, '>')
  2756.       .replace(/&amp;/g, '&');
  2757.   },
  2758.  
  2759.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2760.   decodeUrl(url) {
  2761.     if (!url || typeof url !== 'string') return url;
  2762.     const iPct = url.indexOf('%');
  2763.     const iColon = url.indexOf(':');
  2764.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2765.       decodeURIComponent(url) :
  2766.       url;
  2767.   },
  2768.  
  2769.   deepEqual(a, b) {
  2770.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2771.       return a === b;
  2772.     if (Array.isArray(a)) {
  2773.       return Array.isArray(b) &&
  2774.         a.length === b.length &&
  2775.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2776.     }
  2777.     const keys = Object.keys(a);
  2778.     return keys.length === Object.keys(b).length &&
  2779.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2780.   },
  2781.  
  2782.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2783.  
  2784.   forceLayout(node) {
  2785.     // eslint-disable-next-line no-unused-expressions
  2786.     node.clientHeight;
  2787.   },
  2788.  
  2789.   formatError(e, rule) {
  2790.     const message =
  2791.       e.message ||
  2792.       e.readyState && 'Request failed.' ||
  2793.       e.type === 'error' && `File can't be displayed.${
  2794.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2795.       }` ||
  2796.       e;
  2797.     const m = [
  2798.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2799.       ['', 'font-weight:normal'],
  2800.     ];
  2801.     m.push(...[
  2802.       ['Node: %o', ai.node],
  2803.       ['Rule: %o', rule],
  2804.       ai.url && ['URL: %s', ai.url],
  2805.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2806.     ].filter(Boolean));
  2807.     return {
  2808.       message,
  2809.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2810.       consoleArgs: m.map(([, v]) => v),
  2811.     };
  2812.   },
  2813.  
  2814.   isHovered(el) {
  2815.     // doesn't work in image tabs, browser bug?
  2816.     return App.isImageTab || el.closest(':hover');
  2817.   },
  2818.  
  2819.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2820.  
  2821.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2822.  
  2823.   newFunction(...args) {
  2824.     try {
  2825.       return App.NOP || new Function(...args);
  2826.     } catch (e) {
  2827.       if (!RX_EVAL_BLOCKED.test(e.message))
  2828.         throw e;
  2829.       App.NOP = () => {};
  2830.       return App.NOP;
  2831.     }
  2832.   },
  2833.  
  2834.   rel2abs(rel, abs = location.href) {
  2835.     try {
  2836.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2837.         new URL(rel, abs).href;
  2838.     } catch (e) {
  2839.       return rel;
  2840.     }
  2841.   },
  2842.  
  2843.   stringify(...args) {
  2844.     const p = Array.prototype;
  2845.     const {toJSON} = p;
  2846.     if (toJSON) p.toJSON = null;
  2847.     const res = JSON.stringify(...args);
  2848.     if (toJSON) p.toJSON = toJSON;
  2849.     return res;
  2850.   },
  2851.  
  2852.   suppressTooltip() {
  2853.     for (const node of [
  2854.       ai.node.parentNode,
  2855.       ai.node,
  2856.       ai.node.firstElementChild,
  2857.     ]) {
  2858.       const t = (node || 0).title;
  2859.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2860.         ai.tooltip = {node, text: t};
  2861.         node.title = '';
  2862.         break;
  2863.       }
  2864.     }
  2865.   },
  2866.  
  2867.   tabFixUrl() {
  2868.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2869.            navigator.userAgent.includes('Gecko/') &&
  2870.            flattenHtml(`data:text/html;charset=utf8,
  2871.       <style>
  2872.         body {
  2873.           margin: 0;
  2874.           padding: 0;
  2875.           background: #222;
  2876.         }
  2877.         .fit {
  2878.           overflow: hidden
  2879.         }
  2880.         .fit > img {
  2881.           max-width: 100vw;
  2882.           max-height: 100vh;
  2883.         }
  2884.         body > img {
  2885.           margin: auto;
  2886.           position: absolute;
  2887.           left: 0;
  2888.           right: 0;
  2889.           top: 0;
  2890.           bottom: 0;
  2891.         }
  2892.       </style>
  2893.       <body class=fit>
  2894.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2895.       </body>
  2896.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2897.   },
  2898. };
  2899.  
  2900. async function setup({rule} = {}) {
  2901.   if (!isFunction(doc.body.attachShadow)) {
  2902.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2903.           'You can edit the script\'s storage directly in your userscript manager.');
  2904.     return;
  2905.   }
  2906.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2907.   let uiCfg;
  2908.   let root = (elConfig || 0).shadowRoot;
  2909.   let {blankRuleElement} = setup;
  2910.   /** @type NodeList */
  2911.   const UI = new Proxy({}, {
  2912.     get(_, id) {
  2913.       return root.getElementById(id);
  2914.     },
  2915.   });
  2916.   if (!rule || !elConfig)
  2917.     init(await Config.load({save: true}));
  2918.   if (rule)
  2919.     installRule(rule);
  2920.  
  2921.   function init(data) {
  2922.     uiCfg = data;
  2923.     $remove(elConfig);
  2924.     elConfig = $create('div', {contentEditable: true});
  2925.     root = elConfig.attachShadow({mode: 'open'});
  2926.     root.innerHTML = TRUSTED.createHTML(createConfigHtml());
  2927.     initEvents();
  2928.     renderAll();
  2929.     renderCustomScales();
  2930.     renderRules();
  2931.     doc.body.appendChild(elConfig);
  2932.     requestAnimationFrame(() => {
  2933.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2934.     });
  2935.   }
  2936.  
  2937.   function initEvents() {
  2938.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2939.     UI._export.onclick = e => {
  2940.       dropEvent(e);
  2941.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2942.       UI._exportNotification.hidden = false;
  2943.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2944.     };
  2945.     UI._import.onclick = e => {
  2946.       dropEvent(e);
  2947.       const s = prompt('Paste settings:');
  2948.       if (s)
  2949.         init(new Config({data: s}));
  2950.     };
  2951.     UI._install.onclick = setupRuleInstaller;
  2952.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2953.     UI._reveal.onclick = e => {
  2954.       e.preventDefault();
  2955.       cssApp.hidden = !cssApp.hidden;
  2956.       if (!cssApp.hidden) {
  2957.         if (!cssApp.value) {
  2958.           App.updateStyles();
  2959.           cssApp.value = App.globalStyle.trim();
  2960.           cssApp.setSelectionRange(0, 0);
  2961.         }
  2962.         cssApp.focus();
  2963.       }
  2964.     };
  2965.     UI.start.onchange = function () {
  2966.       UI.delay.closest('label').hidden =
  2967.         UI.preload.closest('label').hidden =
  2968.           this.value !== 'auto';
  2969.     };
  2970.     UI.start.onchange();
  2971.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2972.     // color
  2973.     for (const el of $$('[type="color"]', root)) {
  2974.       el.oninput = colorOnInput;
  2975.       el.elSwatch = el.nextElementSibling;
  2976.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2977.       el.elOpacity.elColor = el;
  2978.     }
  2979.     function colorOnInput() {
  2980.       this.elSwatch.style.setProperty('--color',
  2981.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2982.     }
  2983.     // range
  2984.     for (const el of $$('[type="range"]', root)) {
  2985.       el.oninput = rangeOnInput;
  2986.       el.onblur = rangeOnBlur;
  2987.       el.addEventListener('focusin', rangeOnFocus);
  2988.     }
  2989.     function rangeOnBlur(e) {
  2990.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2991.         this.elEdit.onblur(e);
  2992.     }
  2993.     function rangeOnFocus() {
  2994.       if (this.elEdit) return;
  2995.       const {min, max, step, value} = this;
  2996.       this.elEdit = $create('input', {
  2997.         value, min, max, step,
  2998.         className: 'range-edit',
  2999.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3000.         type: 'number',
  3001.         elRange: this,
  3002.         onblur: rangeEditOnBlur,
  3003.         oninput: rangeEditOnInput,
  3004.       });
  3005.       this.insertAdjacentElement('afterend', this.elEdit);
  3006.     }
  3007.     function rangeOnInput() {
  3008.       this.title = (this.dataset.title || '').replace('$', this.value);
  3009.       if (this.elColor) this.elColor.oninput();
  3010.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3011.     }
  3012.     // range-edit
  3013.     function rangeEditOnBlur(e) {
  3014.       if (e.relatedTarget !== this.elRange) {
  3015.         this.remove();
  3016.         this.elRange.elEdit = null;
  3017.       }
  3018.     }
  3019.     function rangeEditOnInput() {
  3020.       this.elRange.valueAsNumber = this.valueAsNumber;
  3021.       this.elRange.oninput();
  3022.     }
  3023.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3024.     // which may happen since it sees only the outer <div> in the event |target|
  3025.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3026.   }
  3027.  
  3028.   function closeSetup(event) {
  3029.     const isApply = this.id === '_apply';
  3030.     if (event && (this.id === '_ok' || isApply)) {
  3031.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3032.       Ruler.init();
  3033.       Menu.reRegisterAlt();
  3034.       if (isApply) {
  3035.         renderCustomScales();
  3036.         UI._css.textContent = cfg._getCss();
  3037.         return;
  3038.       }
  3039.     }
  3040.     $remove(elConfig);
  3041.     elConfig = null;
  3042.   }
  3043.  
  3044.   function collectConfig({save, clone} = {}) {
  3045.     let data = {};
  3046.     for (const el of $$('input[id], select[id]', root))
  3047.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3048.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3049.           el.value || '';
  3050.     Object.assign(data, {
  3051.       css: UI.css.value.trim(),
  3052.       delay: UI.delay.valueAsNumber * 1000,
  3053.       hosts: collectRules(),
  3054.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3055.       scales: UI.scales.value
  3056.         .trim()
  3057.         .split(/[,;]*\s+/)
  3058.         .map(x => x.replace(',', '.'))
  3059.         .filter(x => !isNaN(parseFloat(x))),
  3060.     });
  3061.     if (clone)
  3062.       data = JSON.parse(Util.stringify(data));
  3063.     return new Config({data, save});
  3064.   }
  3065.  
  3066.   function collectRules() {
  3067.     return [...UI._rules.children]
  3068.       .map(el => [el.value.trim(), el[RULE]])
  3069.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3070.       .map(([s, json]) => json || s)
  3071.       .filter(Boolean);
  3072.   }
  3073.  
  3074.   function checkRule({target: el}) {
  3075.     let json, error, title;
  3076.     const prev = el.previousElementSibling;
  3077.     if (el.value) {
  3078.       json = Ruler.parse(el.value);
  3079.       error = json instanceof Error && (json.message || String(json));
  3080.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3081.         !/^[-.a-z0-9]*$/i.test(json.d);
  3082.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3083.         .filter(Boolean).join('\n');
  3084.       el.classList.toggle('invalid-domain', invalidDomain);
  3085.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3086.       if (!prev)
  3087.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3088.     } else if (prev) {
  3089.       prev.focus();
  3090.       el.remove();
  3091.     }
  3092.     el[RULE] = !error && json;
  3093.     el.title = title;
  3094.     el.setCustomValidity(error || '');
  3095.   }
  3096.  
  3097.   async function focusRule({target: el, relatedTarget: from}) {
  3098.     if (el === this)
  3099.       return;
  3100.     await new Promise(setTimeout);
  3101.     if (el[RULE] && el.rows < 2) {
  3102.       let i = el.selectionStart;
  3103.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3104.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3105.       el.setSelectionRange(i, i);
  3106.       el.rows = txt.match(/^/gm).length;
  3107.     }
  3108.     if (!this.contains(from))
  3109.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3110.   }
  3111.  
  3112.   function installRule(rule) {
  3113.     const inputs = UI._rules.children;
  3114.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3115.     if (!el) {
  3116.       el = inputs[0];
  3117.       el[RULE] = rule;
  3118.       el.value = Ruler.format(rule);
  3119.       el.hidden = false;
  3120.       const i = Math.max(0, collectRules().indexOf(rule));
  3121.       inputs[i].insertAdjacentElement('afterend', el);
  3122.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3123.     }
  3124.     const rect = el.getBoundingClientRect();
  3125.     if (rect.bottom < 0 ||
  3126.         rect.bottom > el.parentNode.offsetHeight)
  3127.       el.scrollIntoView();
  3128.     el.classList.add('highlight');
  3129.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3130.     el.focus();
  3131.   }
  3132.  
  3133.   function renderRules() {
  3134.     const rules = UI._rules;
  3135.     rules.addEventListener('input', checkRule);
  3136.     rules.addEventListener('focusin', focusRule);
  3137.     rules.addEventListener('paste', focusRule);
  3138.     blankRuleElement =
  3139.       setup.blankRuleElement =
  3140.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3141.     for (const rule of uiCfg.hosts || []) {
  3142.       const el = blankRuleElement.cloneNode();
  3143.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3144.       rules.appendChild(el);
  3145.       checkRule({target: el});
  3146.     }
  3147.     const search = UI._search;
  3148.     search.oninput = () => {
  3149.       setup.search = search.value;
  3150.       const s = search.value.toLowerCase();
  3151.       for (const el of rules.children)
  3152.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3153.     };
  3154.     search.value = setup.search || '';
  3155.     if (search.value)
  3156.       search.oninput();
  3157.   }
  3158.  
  3159.   function renderCustomScales() {
  3160.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3161.   }
  3162.  
  3163.   function renderAll() {
  3164.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3165.       if (el.id in uiCfg)
  3166.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3167.     for (const el of $$('input[type="range"]', root))
  3168.       el.oninput();
  3169.     for (const el of $$('a[href^="http"]', root))
  3170.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3171.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3172.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3173.   }
  3174. }
  3175.  
  3176. function setupClickedRule(event) {
  3177.   let rule;
  3178.   const el = event.target.closest('blockquote, code, pre');
  3179.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3180.     dropEvent(event);
  3181.     setup({rule});
  3182.   }
  3183. }
  3184.  
  3185. async function setupRuleInstaller(e) {
  3186.   dropEvent(e);
  3187.   const parent = this.parentElement;
  3188.   parent.children._installLoading.hidden = false;
  3189.   this.remove();
  3190.   let rules;
  3191.  
  3192.   try {
  3193.     rules = extractRules(await Remoting.getDoc(this.href));
  3194.     const selector = $create('select', {
  3195.       size: 8,
  3196.       style: 'width: 100%',
  3197.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3198.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3199.     });
  3200.     selector.append(...rules.map(renderRule));
  3201.     selector.selectedIndex = findMatchingRuleIndex();
  3202.     parent.children._installLoading.remove();
  3203.     parent.children._installHint.hidden = false;
  3204.     parent.appendChild(selector);
  3205.     requestAnimationFrame(() => {
  3206.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3207.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3208.       selector.focus();
  3209.     });
  3210.   } catch (e) {
  3211.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3212.   }
  3213.  
  3214.   function extractRules({doc}) {
  3215.     // sort by name
  3216.     return [...$$('#wiki-body tr', doc)]
  3217.       .map(tr => [
  3218.         tr.cells[0].textContent.trim(),
  3219.         Ruler.fromElement(tr.cells[1]),
  3220.       ])
  3221.       .filter(([name, r]) =>
  3222.         name && r && (!r.d || hostname.includes(r.d)))
  3223.       .sort(([a], [b]) =>
  3224.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3225.           a > b ? 1 :
  3226.             0);
  3227.   }
  3228.  
  3229.   function findMatchingRuleIndex() {
  3230.     const dottedHost = `.${hostname}.`;
  3231.     let maxCount = 0, maxIndex = 0, index = 0;
  3232.     for (const [name, {d}] of rules) {
  3233.       let count = !!(d && hostname.includes(d)) * 10;
  3234.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3235.         count += dottedHost.includes(`.${part}.`) && part.length;
  3236.       if (count > maxCount) {
  3237.         maxCount = count;
  3238.         maxIndex = index;
  3239.       }
  3240.       index++;
  3241.     }
  3242.     return maxIndex;
  3243.   }
  3244.  
  3245.   function renderRule([name, rule]) {
  3246.     return $create('option', {
  3247.       textContent: name,
  3248.       title: Ruler.format(rule, {expand: true})
  3249.         .replace(/^{|\s*}$/g, '')
  3250.         .split('\n')
  3251.         .slice(0, 12)
  3252.         .map(renderTitleLine)
  3253.         .filter(Boolean)
  3254.         .join('\n'),
  3255.     });
  3256.   }
  3257.  
  3258.   function renderTitleLine(line, i, arr) {
  3259.     return (
  3260.       // show ... on 10th line if there are more lines
  3261.       i === 9 && arr.length > 10 ? '...' :
  3262.         i > 10 ? '' :
  3263.           // truncate to 100 chars
  3264.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3265.             // strip the leading space
  3266.             .replace(/^\s/, ''));
  3267.   }
  3268.  
  3269.   function maybeSetup(e) {
  3270.     if (!eventModifiers(e))
  3271.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3272.   }
  3273. }
  3274.  
  3275. function createConfigHtml() {
  3276.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3277.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3278.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3279.   return flattenHtml(`
  3280. <style>
  3281.   :host {
  3282.     all: initial !important;
  3283.     position: fixed !important;
  3284.     z-index: 2147483647 !important;
  3285.     top: 20px !important;
  3286.     right: 20px !important;
  3287.     padding: 1.5em !important;
  3288.     color: #000 !important;
  3289.     background: #eee !important;
  3290.     box-shadow: 5px 5px 25px 2px #000 !important;
  3291.     width: 33em !important;
  3292.     border: 1px solid black !important;
  3293.     display: flex !important;
  3294.     flex-direction: column !important;
  3295.   }
  3296.   main {
  3297.     font: 12px/15px sans-serif;
  3298.   }
  3299.   table {
  3300.     text-align:left;
  3301.   }
  3302.   ul {
  3303.     max-height: calc(100vh - 200px);
  3304.     margin: 0 0 15px 0;
  3305.     padding: 0;
  3306.     list-style: none;
  3307.   }
  3308.   li {
  3309.     margin: 0;
  3310.     padding: .25em 0;
  3311.   }
  3312.   li.options {
  3313.     display: flex;
  3314.     align-items: center;
  3315.     justify-content: space-between;
  3316.   }
  3317.   li.row {
  3318.     align-items: start;
  3319.     flex-wrap: wrap;
  3320.   }
  3321.   li.row label {
  3322.     display: flex;
  3323.     flex-direction: row;
  3324.     align-items: center;
  3325.   }
  3326.   li.row input {
  3327.     margin-right: .25em;
  3328.   }
  3329.   li.stretch label {
  3330.     flex: 1;
  3331.     white-space: nowrap;
  3332.   }
  3333.   li.stretch label > span {
  3334.     display: flex;
  3335.     flex-direction: row;
  3336.     flex: 1;
  3337.   }
  3338.   label {
  3339.     display: inline-flex;
  3340.     flex-direction: column;
  3341.   }
  3342.   label:not(:last-child) {
  3343.     margin-right: 1em;
  3344.   }
  3345.   input, select {
  3346.     min-height: 1.3em;
  3347.     box-sizing: border-box;
  3348.   }
  3349.   input[type=checkbox] {
  3350.     margin-left: 0;
  3351.   }
  3352.   input[type=number] {
  3353.     width: 4em;
  3354.   }
  3355.   input:not([type=checkbox])  {
  3356.     padding: 0 .25em;
  3357.   }
  3358.   input[type=range] {
  3359.     flex: 1;
  3360.     width: 100%;
  3361.     margin: 0 .25em;
  3362.     padding: 0;
  3363.     filter: saturate(0);
  3364.     opacity: .5;
  3365.   }
  3366.   u + input[type=range] {
  3367.     max-width: 3em;
  3368.   }
  3369.   input[type=range]:hover {
  3370.     filter: none;
  3371.     opacity: 1;
  3372.   }
  3373.   input[type=color] {
  3374.     position: absolute;
  3375.     width: calc(1.5em + 2px);
  3376.     opacity: 0;
  3377.     cursor: pointer;
  3378.   }
  3379.   u {
  3380.     position: relative;
  3381.     flex: 0 0 1.5em;
  3382.     height: 1.5em;
  3383.     border: 1px solid #888;
  3384.     pointer-events: none;
  3385.     color: #888;
  3386.     background-image:
  3387.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3388.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3389.     background-size: .5em .5em;
  3390.     background-position: 0 0, .25em .25em;
  3391.   }
  3392.   u::after {
  3393.     position: absolute;
  3394.     top: 0;
  3395.     left: 0;
  3396.     right: 0;
  3397.     bottom: 0;
  3398.     content: "";
  3399.     background-color: var(--color);
  3400.   }
  3401.   .range-edit {
  3402.     position: absolute;
  3403.     box-shadow: 0 0.25em 1em #000;
  3404.     z-index: 99;
  3405.   }
  3406.   textarea {
  3407.     resize: vertical;
  3408.     margin: 1px 0;
  3409.     font: 11px/1.25 Consolas, monospace;
  3410.   }
  3411.   :invalid {
  3412.     background-color: #f002;
  3413.     border-color: #800;
  3414.   }
  3415.   code {
  3416.     font-weight: bold;
  3417.   }
  3418.   a {
  3419.     text-decoration: none;
  3420.     color: LinkText;
  3421.   }
  3422.   a:hover {
  3423.     text-decoration: underline;
  3424.   }
  3425.   button {
  3426.     padding: .2em 1em;
  3427.     margin: 0 1em;
  3428.   }
  3429.   kbd {
  3430.     padding: 1px 6px;
  3431.     font-weight: bold;
  3432.     font-family: Consolas, monospace;
  3433.     border: 1px solid #888;
  3434.     border-radius: 3px;
  3435.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3436.   }
  3437.   .column {
  3438.     display: flex;
  3439.     flex-direction: column;
  3440.   }
  3441.   .highlight {
  3442.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3443.     animation-fill-mode: both;
  3444.   }
  3445.   #_rules > * {
  3446.     word-break: break-all;
  3447.   }
  3448.   #_rules > :not(:focus) {
  3449.     overflow: hidden; /* prevents wrapping in FF */
  3450.   }
  3451.   .invalid-domain {
  3452.     opacity: .5;
  3453.   }
  3454.   .matching-domain {
  3455.     border-color: #56b8ff;
  3456.     background: #d7eaff;
  3457.   }
  3458.   #_x {
  3459.     position: absolute;
  3460.     top: 0;
  3461.     right: 0;
  3462.     padding: 4px 8px;
  3463.     cursor: pointer;
  3464.     user-select: none;
  3465.   }
  3466.   #_x:hover {
  3467.     background-color: #8884;
  3468.   }
  3469.   #_cssApp {
  3470.     color: seagreen;
  3471.   }
  3472.   #_exportNotification {
  3473.     color: green;
  3474.     font-weight: bold;
  3475.     position: absolute;
  3476.     left: 0;
  3477.     right: 0;
  3478.     bottom: 2px;
  3479.   }
  3480.   #_installHint {
  3481.     color: green;
  3482.   }
  3483.   @keyframes fade-in {
  3484.     from { background-color: deepskyblue }
  3485.     to {}
  3486.   }
  3487.   @media (prefers-color-scheme: dark) {
  3488.     :host {
  3489.       color: #aaa !important;
  3490.       background: #333 !important;
  3491.     }
  3492.     a {
  3493.       color: deepskyblue;
  3494.     }
  3495.     button {
  3496.       background: linear-gradient(-5deg, #333, #555);
  3497.       border: 1px solid #000;
  3498.       box-shadow: 0 2px 6px #181818;
  3499.       border-radius: 3px;
  3500.       cursor: pointer;
  3501.     }
  3502.     button:hover {
  3503.       background: linear-gradient(-5deg, #333, #666);
  3504.     }
  3505.     textarea, input, select {
  3506.       background: #111;
  3507.       color: #BBB;
  3508.       border: 1px solid #555;
  3509.     }
  3510.     input[type=checkbox] {
  3511.       filter: invert(1);
  3512.     }
  3513.     input[type=range] {
  3514.       filter: invert(1) saturate(0);
  3515.     }
  3516.     input[type=range]:hover {
  3517.       filter: invert(1);
  3518.     }
  3519.     kbd {
  3520.       border-color: #666;
  3521.     }
  3522.     @supports (-moz-appearance: none) {
  3523.       input[type=checkbox],
  3524.       input[type=range],
  3525.       input[type=range]:hover {
  3526.         filter: none;
  3527.       }
  3528.     }
  3529.     .range-edit {
  3530.       box-shadow: 0 .5em 1em .5em #000;
  3531.     }
  3532.     .matching-domain {
  3533.       border-color: #0065af;
  3534.       background: #032b58;
  3535.       color: #ddd;
  3536.     }
  3537.     #_cssApp {
  3538.       color: darkseagreen;
  3539.     }
  3540.     #_installHint {
  3541.       color: greenyellow;
  3542.     }
  3543.     ::-webkit-scrollbar {
  3544.       width: 14px;
  3545.       height: 14px;
  3546.       background: #333;
  3547.     }
  3548.     ::-webkit-scrollbar-button:single-button {
  3549.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3550.     }
  3551.     ::-webkit-scrollbar-track-piece {
  3552.       background: #444;
  3553.       border: 4px solid #333;
  3554.       border-radius: 8px;
  3555.     }
  3556.     ::-webkit-scrollbar-thumb {
  3557.       border: 3px solid #333;
  3558.       border-radius: 8px;
  3559.       background: #666;
  3560.     }
  3561.     ::-webkit-resizer {
  3562.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3563.       border: 2px solid transparent;
  3564.     }
  3565.   }
  3566. </style>
  3567. <style id="_css">${cfg._getCss()}</style>
  3568. <main id="${PREFIX}setup">
  3569.   <div id=_x>x</div>
  3570.   <ul class=column>
  3571.     <details style="margin: -1em 0 0">
  3572.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3573.       <table>
  3574.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3575.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3576.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3577.         <tr><th>Force-activate<br>(for small pics)</th>
  3578.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3579.         <tr><td>&nbsp;</td></tr>
  3580.         <tr><th>Start zooming</th>
  3581.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3582.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3583.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3584.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3585.         <tr><th>Previous/next<br>in album</th>
  3586.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3587.         <tr><td>&nbsp;</td></tr>
  3588.       </table>
  3589.       <table>
  3590.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3591.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3592.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3593.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3594.       </table>
  3595.     </details>
  3596.     <li class="options stretch">
  3597.       <label>Popup shows on
  3598.         <select id=start>
  3599.           <option value=context>Right-click / &#8801; / Ctrl
  3600.           <option value=contextMK>Right-click / &#8801;
  3601.           <option value=contextM>Right-click
  3602.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3603.           <option value=ctrl>Ctrl
  3604.           <option value=auto>automatically
  3605.         </select>
  3606.       </label>
  3607.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3608.       <label title="(if the full version of the hovered image is ...% larger)">
  3609.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3610.       </label>
  3611.       <label>Zoom activates on
  3612.         <select id=zoom>
  3613.           <option value=context>Right click / Shift
  3614.           <option value=wheel>Wheel up / Shift
  3615.           <option value=shift>Shift
  3616.           <option value=auto>automatically
  3617.         </select>
  3618.       </label>
  3619.       <label>...and zooms to
  3620.         <select id=fit>
  3621.           <option value=all>fit to window
  3622.           <option value=large>fit if larger
  3623.           <option value=no>100%
  3624.           <option value="" title="Use custom scale factors">custom
  3625.         </select>
  3626.       </label>
  3627.     </li>
  3628.     <li class=options>
  3629.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3630.       </label>
  3631.       <label>When fully zoomed out:
  3632.         <select id=zoomOut>
  3633.           <option value=stay>stay in zoom mode
  3634.           <option value=auto>stay if still hovered
  3635.           <option value=unzoom>undo zoom mode
  3636.           <option value=close>close popup
  3637.         </select>
  3638.       </label>
  3639.       <label style="flex: 1" title="${trimLeft(`
  3640.         Scale factors to use when “zooms to” selector is set to “custom”.
  3641.         0 = fit to window,
  3642.         0! = same as 0 but also removes smaller values,
  3643.         * after a value marks the default zoom factor, for example: 1*
  3644.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3645.         ${scalesHint}
  3646.       `)}">Custom scale factors:
  3647.         <input id=scales placeholder="${scalesHint}">
  3648.       </label>
  3649.     </li>
  3650.     <li class="options row">
  3651.       <div>
  3652.         <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3653.           <input type=checkbox id=center>Centered*</label>
  3654.         <label title="Provides smoother experience but increases network traffic">
  3655.           <input type=checkbox id=preload>Preload on hover*</label>
  3656.         <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3657.       </div>
  3658.       <div>
  3659.         <label><input type=checkbox id=mute>Mute videos</label>
  3660.         <label title="Disable only if you spoof the HTTP headers yourself">
  3661.           <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3662.         <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3663.           <input type=checkbox id=globalStatus>Set status on &lt;html&gt;*</label>
  3664.       </div>
  3665.       <div>
  3666.         <label title="...or show a partial image while still loading">
  3667.           <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3668.         <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3669.         <label><input type=checkbox id=uiFadeinGallery>Fade-in transition in gallery</label>
  3670.       </div>
  3671.       <label><input type=checkbox id=startAltShown>
  3672.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3673.     </li>
  3674.     <li class="options stretch">
  3675.       <label>Background
  3676.         <span>
  3677.           <input id=uiBackgroundColor type=color><u></u>
  3678.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3679.         </span>
  3680.       </label>
  3681.       <label>Border color, opacity, size
  3682.         <span>
  3683.           <input id=uiBorderColor type=color><u></u>
  3684.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3685.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3686.         </span>
  3687.       </label>
  3688.       <label>Shadow color, opacity, size
  3689.         <span>
  3690.           <input id=uiShadowColor type=color><u></u>
  3691.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3692.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3693.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3694.         </span>
  3695.       </label>
  3696.       <label>Padding
  3697.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3698.       </label>
  3699.       <label>Margin
  3700.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3701.       </label>
  3702.     </li>
  3703.     <li>
  3704.       <a href="${MPIV_BASE_URL}Custom-CSS" target="_blank">Custom CSS:</a>&nbsp;
  3705.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3706.       <a tabindex=0 id=_reveal style="float: right"
  3707.          title="You can copy parts of it to override them in your custom CSS">
  3708.          View the built-in CSS</a>
  3709.       <div class=column>
  3710.         <textarea id=css spellcheck=false></textarea>
  3711.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3712.       </div>
  3713.     </li>
  3714.     <li style="display: flex; justify-content: space-between;">
  3715.       <div><a href="${MPIV_BASE_URL}Custom-host-rules" target="_blank">Custom host rules:</a></div>
  3716.       <div style="white-space: nowrap">
  3717.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3718.         in "d" value, for example <code>"d": "!foo.com"</code>
  3719.       </div>
  3720.       <div>
  3721.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3722.       </div>
  3723.     </li>
  3724.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3725.       <div id=_rules class=column>
  3726.         <textarea rows=1 spellcheck=false></textarea>
  3727.       </div>
  3728.     </li>
  3729.     <li>
  3730.       <div hidden id=_installLoading>Loading...</div>
  3731.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3732.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3733.       <a href="${MPIV_BASE_URL}Rules" id=_install target="_blank">Install rule from repository...</a>
  3734.     </li>
  3735.   </ul>
  3736.   <div style="text-align:center">
  3737.     <button id=_ok accesskey=s>OK</button>
  3738.     <button id=_apply accesskey=a>Apply</button>
  3739.     <button id=_import style="margin-right: 0">Import</button>
  3740.     <button id=_export style="margin-left: 0">Export</button>
  3741.     <button id=_cancel>Cancel</button>
  3742.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3743.   </div>
  3744. </main>`);
  3745. }
  3746.  
  3747. function createGlobalStyle() {
  3748.   App.globalStyle = /*language=CSS*/ (String.raw`
  3749. #\mpiv-bar {
  3750.   position: fixed;
  3751.   z-index: 2147483647;
  3752.   top: 0;
  3753.   left: 0;
  3754.   right: 0;
  3755.   opacity: 0;
  3756.   transition: opacity 1s ease .25s;
  3757.   text-align: center;
  3758.   font-family: sans-serif;
  3759.   font-size: 15px;
  3760.   font-weight: bold;
  3761.   background: #0005;
  3762.   color: white;
  3763.   padding: 4px 10px;
  3764.   text-shadow: .5px .5px 2px #000;
  3765. }
  3766. #\mpiv-bar.\mpiv-show,
  3767. #\mpiv-bar[data-force] {
  3768.   opacity: 1;
  3769. }
  3770. #\mpiv-bar[data-zoom]::after {
  3771.   content: " (" attr(data-zoom) ")";
  3772.   opacity: .8;
  3773. }
  3774. #\mpiv-popup.\mpiv-show {
  3775.   display: inline;
  3776. }
  3777. #\mpiv-popup {
  3778.   display: none;
  3779.   cursor: none;
  3780. ${cfg.uiFadein ? String.raw`
  3781.   animation: .2s \mpiv-fadein both;
  3782.   transition: box-shadow .25s, background-color .25s;
  3783.   ` : ''}
  3784. ${App.popupStyleBase = `
  3785.   border: none;
  3786.   box-sizing: border-box;
  3787.   background-size: cover;
  3788.   position: fixed;
  3789.   z-index: 2147483647;
  3790.   padding: 0;
  3791.   margin: 0;
  3792.   top: 0;
  3793.   left: 0;
  3794.   width: auto;
  3795.   height: auto;
  3796.   transform-origin: center;
  3797.   max-width: none;
  3798.   max-height: none;
  3799. `}
  3800. }
  3801. #\mpiv-popup.\mpiv-show {
  3802.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3803.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3804.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3805.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3806. }
  3807. #\mpiv-popup.\mpiv-show[loaded] {
  3808.   background-color: ${Util.color('Background')};
  3809.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3810. }
  3811. #\mpiv-popup[data-gallery-flip] {
  3812.   animation: none;
  3813.   transition: none;
  3814. }
  3815. #\mpiv-popup[data-no-aa],
  3816. #\mpiv-popup.\mpiv-zoom-max {
  3817.   image-rendering: pixelated;
  3818. }
  3819. #\mpiv-setup {
  3820. }
  3821. @keyframes \mpiv-fadein {
  3822.   from {
  3823.     opacity: 0;
  3824.     border-color: transparent;
  3825.   }
  3826.   to {
  3827.     opacity: 1;
  3828.   }
  3829. }
  3830. ` + (cfg.globalStatus ? String.raw`
  3831. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3832.   cursor: progress !important;
  3833. }
  3834. :root.\mpiv-edge #\mpiv-popup {
  3835.   cursor: default;
  3836. }
  3837. :root.\mpiv-error *:hover {
  3838.   cursor: not-allowed !important;
  3839. }
  3840. :root.\mpiv-ready *:hover,
  3841. :root.\mpiv-large *:hover {
  3842.   cursor: zoom-in !important;
  3843. }
  3844. :root.\mpiv-shift *:hover {
  3845.   cursor: default !important;
  3846. }
  3847. ` : String.raw`
  3848. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3849.   cursor: progress;
  3850. }
  3851. [\mpiv-status~="edge"]:hover {
  3852.   cursor: default;
  3853. }
  3854. [\mpiv-status~="error"]:hover {
  3855.   cursor: not-allowed;
  3856. }
  3857. [\mpiv-status~="ready"]:hover,
  3858. [\mpiv-status~="large"]:hover {
  3859.   cursor: zoom-in;
  3860. }
  3861. [\mpiv-status~="shift"]:hover {
  3862.   cursor: default;
  3863. }
  3864. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3865.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3866.   return App.globalStyle;
  3867. }
  3868.  
  3869. //#region Global utilities
  3870.  
  3871. const clamp = (v, min, max) =>
  3872.   v < min ? min : v > max ? max : v;
  3873.  
  3874. const compareNumbers = (a, b) =>
  3875.   a - b;
  3876.  
  3877. const flattenHtml = str =>
  3878.   str.trim().replace(/\n\s*/g, '');
  3879.  
  3880. const dropEvent = e =>
  3881.   (e.preventDefault(), e.stopPropagation());
  3882.  
  3883. const ensureArray = v =>
  3884.   Array.isArray(v) ? v : [v];
  3885.  
  3886. /** @param {KeyboardEvent} e */
  3887. const eventModifiers = e =>
  3888.   (e.altKey ? '!' : '') +
  3889.   (e.ctrlKey ? '^' : '') +
  3890.   (e.metaKey ? '#' : '') +
  3891.   (e.shiftKey ? '+' : '');
  3892.  
  3893. const isFunction = val => typeof val === 'function';
  3894.  
  3895. const now = performance.now.bind(performance);
  3896.  
  3897. const sumProps = (...props) => {
  3898.   let sum = 0;
  3899.   for (const p of props)
  3900.     sum += parseFloat(p) || 0;
  3901.   return sum;
  3902. };
  3903.  
  3904. const tryCatch = function (fn, ...args) {
  3905.   try {
  3906.     return fn.apply(this, args);
  3907.   } catch (e) {}
  3908. };
  3909.  
  3910. const $ = (sel, node = doc) =>
  3911.   node.querySelector(sel) || false;
  3912.  
  3913. const $$ = (sel, node = doc) =>
  3914.   node.querySelectorAll(sel);
  3915.  
  3916. const $create = (tag, props) =>
  3917.   Object.assign(doc.createElement(tag), props);
  3918.  
  3919. const $css = (el, props) =>
  3920.   Object.entries(props).forEach(([k, v]) =>
  3921.     el.style.setProperty(k, v, 'important'));
  3922.  
  3923. const $parseHtml = str =>
  3924.   new DOMParser().parseFromString(str, 'text/html');
  3925.  
  3926. const $many = (q, doc) => {
  3927.   for (const selector of ensureArray(q)) {
  3928.     const el = selector && $(selector, doc);
  3929.     if (el)
  3930.       return el;
  3931.   }
  3932. };
  3933.  
  3934. const $prop = (sel, prop, node = doc) =>
  3935.   (node = $(sel, node)) && node[prop] || '';
  3936.  
  3937. const $propUp = (node, prop) =>
  3938.   (node = node.closest(`[${prop}]`)) &&
  3939.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3940.   '';
  3941.  
  3942. const $remove = node =>
  3943.   node && node.remove();
  3944.  
  3945. //#endregion
  3946. //#region Init
  3947.  
  3948. nonce = ($('script[nonce]') || {}).nonce || '';
  3949.  
  3950. Config.load({save: true}).then(res => {
  3951.   cfg = res;
  3952.   if (Menu) Menu.register();
  3953.  
  3954.   if (doc.body) App.checkImageTab();
  3955.   else addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3956.  
  3957.   addEventListener('mouseover', Events.onMouseOver, true);
  3958.   addEventListener('contextmenu', Events.onContext, true);
  3959.   addEventListener('keydown', Events.onKeyDown, true);
  3960.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3961.     addEventListener('click', setupClickedRule, true);
  3962.   addEventListener('message', App.onMessage, true);
  3963. });
  3964.  
  3965. //#endregion